Questions&Answers

The flame shape

It is a thin disk - shaped flame that extends evenly around the wall or top of the furnace.

structure

It is composed of ejector, head and burner (fire hole).

The working principle

The gas is inhaled by the nozzle for one time, mixed and then discharged through the strip fire hole of the head. The secondary air is inhaled by the negative pressure in the furnace and meets with the gas mixture at the outlet of the fire hole. When the two are mixed, they burn in the brick groove of the burner, forming a flat flame.

The characteristics 

1,Uniform heating to prevent local overheating -- as the flame center is a reflux zone, it has the effect of stabilizing the flame and stirring.

2, the center of the flame is the reflux zone - enhanced combustion, need less excess air - reduce the NOx content in the flue gas.

3, the furnace heating (convection, radiation heat transfer intensifies), and close to the heated parts - heating materials quickly, save gas.

4,Uniform pressure inside the furnace (positive pressure zone around the furnace wall) -- prevent cold air inhalation.

5,High requirements for manufacturing and installation, limited positioning, and not too large thermal load.

The NOx produced during combustion mainly includes fuel type, thermal type and rapid type. As for gas fuel, the NOx produced by gas combustion is mainly of the rapid type and thermal type due to the little nitrogen in the fuel. From the perspective of reducing thermal type and rapid type NOx, the core technology of low nitrogen combustion is to rationally optimize the mixing process of fuel and combustion air and control the local high temperature in the furnace.

At present, low-nitrogen gas burners generally adopt technologies such as graded combustion and thick-light combustion, etc. Although NOx production can be reduced to a certain extent, it cannot meet the existing environmental protection standards [3]. On the basis of the existing technology, the new low-nitrogen gas burner integrates the most advanced ultra-low nitrogen combustion technologies, such as subsonic supermixing and strong and weak cyclone hedging dynamics [4-5] (FIG. 1 -- FIG. 3). On the one hand, fuel and air are fully mixed, local high-temperature zone in the furnace is eliminated, and the residence time of flue gas in the high-temperature zone is reduced. On the other hand, it enhances the combustion stability and provides a favorable guarantee for increasing the flue gas external circulation technology. In order to meet the standard that NOx emission mass concentration of gas boiler is lower than 30 mg/m3, flue gas recirculation technology must be added on the basis of existing low-nitrogen burners to achieve the emission standard of gas boiler. Flue gas recirulation will be low temperature flue gas boiler tail into the combustion air, and fully mixed with the combustion air to participate in combustion, can effectively reduce the volume fraction of oxygen in the combustion air, thus reducing the initial mixing combustion intensity and combustion temperature in the furnace, and finally reduce the furnace thermal NOx generation effect.

Considering the flue gas recirculation effect and the influence of combustion stability, a new type of low nitrogen gas burner design makes the gas fuel in the throat section into plane distribution, combustion flame along the radial and axis from the inner to the outer layers of support, superior combustion stability, and overcome the existing low nitrogen gas burners in after adding flue gas recirculation combustion efficiency is low, the problem of the flame, and can effectively control quality of NOx emission concentration under 30 mg/m3. New type burner with low nitrogen recycling flue gas is mainly in guarantee under the condition of combustion stability, reduce the combustion air oxygen volume fraction, burner combustion intensity decrease throat area, makes the fuel part turned back along the depth of the chamber of a stove or furnace combustion, flame length longer, can make full use of furnace space to reduce the flame temperature, thus inhibiting type thermal NOx formation.

1. Positioning of burner

Many companies use "light column" burners positioning, accurate control, but not easy to operate. It is better to use the position scale to locate on the kiln head section. Generally, it is better to control the position slightly to the right of the X axis of the kiln head section or slightly to the fourth quadrant. In special process conditions can do a little fine tuning.

2. Influence of burner position on kiln conditions

During installation, when the burner is in the horizontal position, the center point and the cross section center point of the kiln are at the same point. Before the end of each overhaul, the position of the burner is corrected and checked more than once. During normal production, the method to determine the correct position of the burner and to adjust the burner is as follows:

Look from the kiln, the shape of the flame should complete strong, lively, not scour kiln skin, also can't top material calcined, outer flame of fire in contact with the material with stove, if the location of the burner is too partial, the flame will flush into the kiln, kiln cylinder local high temperature, reduce the service life of kiln lining, and the calcining zone of the kiln will be backward outspread, furnace thermal system disorder, serious when, soon red kiln feeding. At this point, the burner should be properly adjusted to the direction of the material, so that the flame flame and material contact. If the burner is too close to the material, the flame will support the material, causing the top fire forced burning incomplete coal powder is wrapped by the rolling material, burning with a serious reduction atmosphere, reducing the quality of clinker. The gas with a serious reducing atmosphere is brought into the preheater system to reduce the temperature of the liquid phase of the material, make the preheater system crust or even block, and affect the normal calcining of the kiln. At this time, the burner should be properly adjusted away from the material to make the flame smooth and powerful.

3. Adjustment of normal and abnormal conditions

In normal operation, if the temperature of the kiln firing zone is low, the opening of the inner wind butterfly valve should be increased and the opening of the outer wind butterfly valve should be reduced to shorten the flame and improve the temperature before kiln. When the sintering temperature is too high, it is necessary to open the outer wind butterfly valve and close the inner wind butterfly valve, so as to make the flame elongate, maintain a certain fast turning rate of the kiln, and improve the output and quality of clinker.

If found thick kiln stove or ring, should be disposed in time, otherwise it will affect the yield and quality of clinker, into the furnace burner that outside the wind butterfly valve fully open, endogenous wind butterfly valve is short, the center of butterfly valve will open a big wind, make the flame, burning with ward, improve the body temperature, if found burnt with a flat piece of material, certificate after circle has dropped, the burner all back to the furnace mouth position, outside the wind butterfly valve closed small open degree, endogenous wind butterfly valve open big, center of butterfly valve to close small wind, shorten the flame, improve kiln speed, good control of clinker junction temperature, protect the calcining zone kiln. Because there are a lot of factors, should be according to the kiln type and the structure of the ring, the specific situation analysis, as long as the method is reasonable, it is not difficult to deal with.

Therefore, the method can be used to solve the problem

1. Close all switches without power supply and check the fuse

1. Limit controller TL is turned on for adjustment or update

1. Adjust or update the security controller

1. Control box lock restart (1 second after lock)

1. Disconnect the motor protection (phase loss) and reset the thermal relay

1. Replace the stuck pump after damage

1. Check the connection for electrical connection errors

1. Control box is damaged and replaced

1. Replace the motor controller if it is damaged

1. Motor damage and replacement

1. Photocell short circuit replace the photocell

1. Eliminate the light source or replace the control box when light and simulated flame appear

1. Reset after phase-missing protection connection

1. There is no oil in the oil tank or there is water in the oil tank. Raise the oil level or drain the water

1. Improper adjustment of combustion head and air control valve. See page 5-8

1. Primary solenoid valve or safety solenoid valve has not been opened to check the circuit and replace the solenoid valve

1. The primary nozzle is blocked, dirty or damaged and replaced

1. The ignition electrode is not adjusted or dirty-adjusted or cleaned

1. The electrode is replaced due to the failure of the insulation equipment

1. Damage of high voltage cable or replacement of ground

1. Deformation replacement and protection of high voltage cable due to high temperature

1. Ignition transformer is damaged and replaced

1. Solenoid valve or transformer connection error check

1. Control box is damaged and replaced

1. Pump does not move restart and see the reason for previous immobility

1. The connecting shaft joint is damaged and replaced

1. Inversely connect the inlet and outlet pipelines

1. The pump connection valve is closed and open

1. Dirty filter: pipeline - pump - nozzle cleaning

1. Replace the connection by reversing the motor

Lock within 5 seconds after successful ignition. 1. Photocell or control box damaged and replaced

1. Clean the dirty photocell

1. The first-class hydraulic cylinder is not opened to replace the hydraulic cylinder

Pulsating ignition or ignition instability 1. Incorrect setting of combustion head

1. Dirty electrode or improper position adjustment (see Figure B on page 5)

1. The damper is set incorrectly, and the level 1 wind is too high for adjustment (see Figure D on page 8).

1. Primary nozzle not suitable for boiler or burner adjustment (see table on page 4)

1. First stage nozzle is damaged and replaced

1. The pump pressure is not suitable for adjustment between 10 and 14bar

The control device TR is not closed for adjustment or replacement

1. Control box is damaged and replaced

1. Secondary solenoid valve coil is damaged or solenoid valve is blocked and replaced

The second nozzle is sprayed with oil, but the damper cannot reach the fire position. 

1. Secondary hydraulic cylinder is damaged and replaced

The burner will stop at the stage of fire switching, and the burner will start again. 

1. Clean the dirty photocell

1. Excessive air volume reduction

Abnormal fuel supply 1. Check that oil is supplied to the burner from a tank close to the burner due to the oil supply system or pump

There is water in the tank. Remove the water from the bottom of the pump with other pumps

Pump noise, abnormal movement 1. Inlet pipe intake. The inlet pressure of the oil pump is too high (higher than 35cm hg) to tighten the connection

1. Too large liquid level difference between tank/burner adopts circulating circuit for oil supply

1. Pipe diameter is too small to increase

1. Plug and clean the oil inlet filter

1. Oil inlet valve is closed and open

1. The condensation of paraffin causes the temperature to drop and another light oil is added

After a long time of interruption, the pump does not start. 1. The return pipe is not immersed in the oil, return it to the inlet oil level

1. The inlet gas of the oil system fastens the joint

Pump leakage 1. Leakage from the seal to replace the pump

Smoke - black or white smoke 1. Insufficient air volume adjust the damper according to page 5,8

1. Wrong nozzle type selection or plug replacement

1. Replace or clean the nozzle filter block

1. Wrong adjustment of pump pressure to 10-14bar

1. Keep the fire blade dirty, loose or damaged. Clean, tighten or replace it

1. The furnace exhaust capacity is not large enough to increase

- white smoke 1. Too much air intake adjust the damper according to page 5,8

Dirty burner 1. Replace the dirty nozzle or filter

1. Improper injection amount or Angle of the nozzle refer to the push nozzle, page 4

1. Screw the nozzle loose and tight

1. Clean sundries on fire stabilizers

1. Incorrect combustion head or insufficient air volume adjust according to page 5 to open the damper

1. The length of the combustion head is not suitable for the connection between boiler and boiler plant

1. Burner nozzle does not spray oil

The possible causes are oil supply pipeline blockage, oil pump not pumping, oil supply pipeline vacuum leakage, etc. Remove the high pressure discharge pipe to check the oil condition of the oil pump. When pumping oil normally, the oil column should be ejected outward. There is another reason why the nozzle does not spray oil, that is, the oil solenoid valve is not energized. When the oil break solenoid valve loses power, even if the oil pump is in normal operation, the high-pressure end will not supply oil to the fuel injection nozzle. Only after the controller makes the oil break solenoid valve electrified can diesel fuel be allowed to blow out, the purpose of which is to prevent the original accumulation of diesel fuel in the furnace from deflating when it meets an open fire. Under normal circumstances, the burner carries out a pre-blow air to clean the combustion chamber of residual diesel oil, and then fuel injection ignition. In the pre-blowing stage, although the oil pump motor is running, the oil cut-off solenoid valve is not energized, and the high-pressure diesel oil pumped by the oil cut-off solenoid valve cannot reach the fuel injection nozzle.

2. No ignition high pressure

When the ignition transformer is energized, a high voltage of about 8KV is generated. This voltage breaks through the electrode gap, generating a strong spark that ignites the diesel oil mist. When the flame burns stably, the spark ignition is no longer needed, and the flame sensor sends the flame status information to the controller to stop the work of the ignition transformer. First, the ignition transformer is not energized (it may be due to poor contact of the power supply line or the relay in the controller). The other is that the insulation between the two thermal electrodes is poor due to carbon deposition, and the high voltage is leaked, so there is no discharge spark. The distance between the ignition electrodes should be about 3mm, and the distance between the ignition electrodes and the front face of the nozzle should be about 5-7mm. The two electrodes must be well insulated.

3. Low pressure of burner oil pump

After long-term use and wear of the oil pump, its maximum pressure will gradually decrease, resulting in bad oil injection atomization and difficulty in ignition. After fire, there will be a large number of smoke and unstable flame, and it is of no help to adjust the pressure of the oil pump. The aging of the nozzle results in a similar situation of poor atomization.

Look: that is, by observing the surface phenomena, so as to find and troubleshoot. Such as indicator light, alarm light, motor steering, electric eye, electrode position, damper and combustion head position, servo motor action, chimney installation, tubing diameter, wiring, thermal relay, flame color, smoke color, oil pressure gauge, gas pressure gauge, etc.

Listen: Use the sound to determine the fault position of the burner. For example, the sound of electrode rod discharge, ignition and deflagration, oil pump, motor, program controller running, fire switching, solenoid valve switch, etc.

Q: That is, ask the user. Such as wire modification, voltage fluctuation, temperature setting, fuel replacement, oil line cleaning, failure time, failure regularity, the length of service time, the recent self-inspection position and process.

Repair: according to the above three points and combined with the working principle of the burner to determine the fault location and repair.

1. For the newly installed furnace, before commissioning, it is necessary to carefully test whether the gas and pressure meet the requirements of the burner; Check whether the testing instrument on the air supply pipeline is normal and whether the valve of the pipeline is open and closed normally, and whether it is convenient for future use and maintenance.

2. For newly installed piping, all piping shall be carefully checked for installation reliability and piping tightness.

3. Users using separate gasification stations should ensure that the air supply quantity and gas supply parameters meet the requirements of safe combustion.

4. The operator should read the instruction carefully and master the safe operation knowledge and method.

5. Check whether the gas valve is open before starting each time, otherwise the burner will not work (and will not alarm).

6. Start the "running" button on the control cabinet. At this time, the digital display table will show the current temperature of water discharge, return and smoke exhaust of the furnace. The temperature of the new installation furnace is the ambient temperature.

7. After the delay of boiler controller is about 1 minute, the relay of combustion engine is controlled to suck in, and the fan of combustion engine works for about 45 seconds to prepurge. If the burner fan does not work and does not alarm, check whether the low gas pressure switch is protected (if the BURNER rs38-50 on Riya Road should also check whether the plug cap is in good contact); Check whether the outlet temperature of boiler water meets the working requirements of boiler controller temperature parameters, that is, whether the outlet water temperature is lower than the set temperature.

8. Combustion machine in advance after the purging throttle down to ignition, burning machine controller yellow lights flashing, ignition transformer discharge, about 2-3 seconds after gas solenoid valve open electricity, formed after the fire, flame detector detect flame and flame stability after combustion, ignition power transformer, secondary electro-magnetic valve or 2 fire on fire.

9. When the combustion controller receives a signal that is not favorable to combustion (e.g., failed ignition, unstable air pressure, circuit problem), etc., the combustion controller will immediately turn off the gas and issue an alarm signal.

10. If the combustion controller alarms, it must be manually reset by the operator after the fault is solved before it can continue to work.

11. For the operation of the whole equipment, operators should refer to the furnace safety operation rules and production process requirements for operation.

12. When the control temperature needs to be adjusted according to the production process requirements, the operator should refer to the intelligent NUMERICAL control table manual for adjustment.

1. Preliminary blowing

Before the combustion machine ignition, there must be a period of pre-blowing, the furnace and flue in the residual air blown away or diluted. Because the combustion chamber is inevitably left over gas, if not pre-blowing and ignition, there is a risk of explosion. The residual gas must be blown clean or diluted to ensure that the gas concentration is not within the explosion limit. The preblowing time is generally set to 15-60 seconds depending on the structure of the furnace and the blowing volume.

2. Automatic ignition

Electric spark ignition is suitable for gas burning machine, which is easy to realize automatic control. High voltage ignition transformer can be used to generate arc ignition, and its output energy is required to be: voltage ≥ 3.5K V, current ≥15mA, ignition time is generally: 2 ~ 5 seconds.

3. Combustion status monitoring

The combustion state must be dynamically monitored. Once the flame detector detects the flameout signal, it must be fed back to the burner within a very short time. The burner will then enter the protection state and cut off the gas supply.The flame detector should be able to sense the flame signal normally, neither sensitive nor dull. Because of sensitivity, if the combustion state fluctuates, it is easy to produce false action and slow, and the feedback flame signal lags behind, which is not conducive to safe operation.It is generally required that the response time from flameout to flame-detector flameout signal should not exceed 0.2 seconds.

4. Protection after ignition failure

When the burner ignites, the gas is fed into the burner and ignited. The ignition action should take place before the gas inlet, and the ignition temperature field should be formed first to facilitate the ignition and combustion. If the fire is not lit, the flame detector cannot detect the flame signal, and the burner enters the protective state.The time from ignition to protection should be appropriate, neither too short nor too long. Too short, too late to form a stable flame; Too long, when the ignition does not cause a large amount of gas into the furnace. Generally, it is required that the burner judge the flame signal detected by the flame detector in 2-3 seconds after the gas is injected. If there is no fire, the burner will enter the protective state, and if there is fire, the combustion will be maintained.

5. Protect the burner by extinguishing it

In the combustion process, if the combustion machine accidentally shut off, the combustion machine into the protection state. Because the furnace is hot. Gas entry is prone to deflagration, so it is necessary to enter the protection state in a very short time and cut off the gas supply.The response time is required to be no more than 1 second from the occurrence of flameout to the state of combustion entry protection.

6. Gas pressure high and low limit protection

The steady combustion of the gas burner has a certain range, and only the gas pressure is allowed to fluctuate within a certain range. The purpose of limiting the gas high and low pressure is to ensure the flame stability: it does not take off, does not flameout and does not temper, and at the same time, it limits the heat output power of the burner to ensure the safe and economic operation of the equipment. When the gas pressure exceeds this range, the burner should be locked in operation.Generally, gas pressure switch is used in the design of combustion machine to sense pressure signal and output switching signal, so as to control the corresponding work of combustion machine.

7. Insufficient air pressure protection

Gas-fired combustion engine is designed with high thermal intensity, and its combustion mode adopts blast forced mode. If the failure of the fan causes air interruption or air shortage, cut off the gas immediately, otherwise the furnace deflagration or tempering to the fan will occur. Therefore, while improving the quality of the fan, the gas control must be interlinked with the air pressure. When the air pressure is insufficient, the gas supply should be cut off immediately.Generally, the gas pressure switch is used to sense the air pressure signal and output the switching signal to control the corresponding work of the gas solenoid valve.

8. Blackout protection

If the power is suddenly cut off in the working process of the burner, the gas supply must be cut off immediately to protect the safety of the equipment. Gas control solenoid valve must be normally closed, once power off, automatically shut off the gas supply. Solenoid valve closing response time ≤5s.

9. Measures to prevent gas leakage accidents

Gas leakage may cause boiler explosion. There are several ways to solve the problem of gas leakage in the gas furnace: first, strengthen the pre-blowing time and blowing volume, blow off or dilute the gas in the furnace; Second, the gas pipeline adopts two solenoid valves in series to improve the system safety; Third, the pipeline leakage detection device is used to detect the gas pipeline before ignition. If the gas leakage reaches a certain amount, the combustion machine will be locked.

1. The cooling air valve system is set in front of the burner's primary air elbow, and the main equipment is the shut-off valve and the backcheck valve with the actuator. Basic operation requirements are as follows:

1）When the oil gun is put into operation (the valve is opened), air is provided at the initial stage of combustion;

2) When the burner is out of service (the valve is open), provide cooling air to cool the burner's primary air pipe;

3) When burning coal, the shutoff valve will be closed.

2. In the process of starting the oil gun operation, coaxial combustion mode of oil and coal is not allowed, that is, the same burner cannot start the oil gun and coal powder at the same time.

3. When the burner is put into operation, it is necessary to open the relevant valves on the sealing air duct and cooling air pipe of the burner to prevent the burner from burning.

4. When the burner is put into operation, the primary wind speed must not be too high or too low.

5. When the burner is out of service, the inlet baffle of the large bellows shall be placed at the cooling position, and the secondary air actuator outside the swirl of the burner shall be placed at the cooling position (commonly known as the off position).

6. The burner oil gun shall be operated at regular intervals, and any blockage or inflexibility shall be dealt with in time to ensure that it can be put into use immediately when needed.

7. The purge pipe of oil gun and peephole of burner shall be purged regularly to prevent dust accumulation.

1. Positioning of burners. Many companies adopt "light column method" for positioning, accurate control, but inconvenient operation. It is better to use the position scale to locate on the kiln head section. Generally, it is better to control the position slightly to the right of the X axis of the kiln head section or slightly to the fourth quadrant. In special process conditions can do a little fine tuning.

2. Influence of flame Shape on calcining The best flame shape for burner design is the position of axial flow wind and swirling wind at (0.0) (the maximum ventilation rate of each duct at this time), when the flame shape is complete and powerful. Lateral distribution of burners. Flame shape adjustment is accomplished by adjusting the ventilation cross-sectional area of each duct. The ventilation cross-sectional area of axial and swirling winds is maximized. The shape of the flame is obtained through the mutual influence and restriction of the swirling wind and axial flow wind. The stability of the flame shape is achieved through the central wind, which can neither be too large nor too small. To change the flame shape, a stable primary air outlet pressure is needed to maintain the flame shape. The flame shape can be changed by stabilizing the pressure on the burner and changing the ventilation cross-sectional area of each duct. A change in the shape of a specific flame. When adjusting the shape of the flame, to avoid extreme phenomenon, when the flame is too thick, it will be very long, very soft. When the flame is too thin, the flame will be too short, burning into a strip requires the shape of the flame integrity, lively, powerful, which requires our long-term observation and summary of experience.

3. Regulation of normal and abnormal conditions: In normal operation, if the temperature of the kiln firing zone is low, open the inner wind butterfly valve to a large extent and close the outer wind butterfly valve to shorten the flame and increase the temperature before the kiln; When the sintering temperature is too high, it is necessary to open the outer wind butterfly valve and close the inner wind butterfly valve, so as to make the flame elongate, maintain a certain fast turning rate of the kiln, and improve the output and quality of clinker. If found thick kiln stove or ring, should be disposed in time, otherwise it will affect the yield and quality of clinker, into the furnace burner that outside the wind butterfly valve fully open, endogenous wind butterfly valve is short, the center of butterfly valve will open a big wind, make the flame, burning with ward, improve the body temperature, if found burnt with a flat piece of material, certificate after circle has dropped, the burner all back to the furnace mouth position, outside the wind butterfly valve closed small open degree, endogenous wind butterfly valve open big, center of butterfly valve to close small wind, shorten the flame, improve kiln speed, good control of clinker junction temperature, protect the calcining zone kiln. Because there are a lot of factors, should be according to the kiln type and the structure of the ring, the specific situation analysis, as long as the method is reasonable, it is not difficult to deal with.

1.The system consists of fuel tank, fuel pump, burner oil pump, injection valve (nozzle), etc., the system pressure is low, not only can not guarantee the atomization effect, but also can not complete the oil supply of the burner.

2.Fuel oil temperature is low, viscosity increases the oil temperature, affect the atomization effect, low temperature viscosity is not easy to atomize and easy to cause the filter (mesh 300 m) plug oil pressure reduction, due to the viscosity, combustion is not sufficient to ensure the temperature and a lot of black smoke and furnace carbon; The environment temperature is low in the long winter in this area, and the burner operates at low temperature. The automatic control system is equipped with low temperature alarm for fuel oil or the low temperature alarm system automatically shuts down the burner.

3.High water cut, resulting in low oil cut in the early stage of production, no fuel tank bottom water cut off, after long-term operation, there is more water in the tank, there is high water cut off, no high water cut off after the bottom water.

4.equipment failure, leading to stop the furnace.

5.The spring of the nozzle oil gun is damaged and broken, and the fuel oil cannot be sprayed, which leads to the furnace stopping or secondary combustion and explosion accidents. The nozzle thimble is damaged and broken, and the fuel oil cannot be ejected, and the fuel oil is transported back to the fuel tank through the return line. The flame monitor cannot catch the flame signal, and automatically stops the burner; Oil gun spring is damaged, due to the fuel oil pressure, part of the fuel oil through the nozzle, flow into the chamber of a stove or furnace space within a large number of oil and gas gathering, failed to timely check point furnace, secondary burning in the hearth or explosion accidents, the wind oil ratio is in accordance with the normal operation of the set, a large amount of fuel oil cannot adhere to fully burning form coking furnace lining, affect the efficiency, forming a large number of black smoke, damage to the environment, the furnace, part of the fuel oil in burning in the hearth, formation of coked again.

6.Flame monitor fault stop furnace in operation, the flame monitor damage or probe dust, unable to detect the flame in real time, due to the flame signal and flame monitoring loop failure and lock stop furnace, regularly check the flame monitor and clean the flame monitor dust effectively eliminate due to the flame monitor fault stop furnace.

7.Breakdown or ignition electrode gap is big, not ignite fuel oil ignition electrode in high temperature environment for a long time, porcelain tube burst will happen or electrode in the condition of high voltage breakdown caused by heavy short circuit or ignition electrode gap (5 to 8 mm) is too heavy to pull arc, ignition process, the fan after purging, the pump running, not ignite after atomization of fuel oil, regularly check the ignition electrode and adjust ignition electrode gap effectively improve furnace operation.

8.Was programmed, and insurance is damaged, unable to start the burner program controller is an important device of control the operation of the burner, the price is relatively expensive, is hub station automatic control equipment, the main fan start exercising control (purging and provides combustion-supporting air) and burner ignition burning, various control commands and data transmission control circuit function.

9.Pet-name ruby temperature control switch, the oil temperature electronic regulator is damaged, can't be heating burner installed electronic two oil temperature controller and electric heater, as a fuel oil for heating, maximize the fuel oil atomization effect, keep the oil temperature is between 75-80 degrees Celsius, once damaged, can't guarantee the atomization effect, fuel oil viscosity increases, lead to program the lock or low oil temperature, burner can't run.

10.Attending automatic control equipment damage lock, signal can't pass or no signal source furnace respectively set overtemperature and overpressure alarm stop chain furnace parameters, was stopped by the transmission temperature overtemperature and overpressure furnace, boiler water temperature overtemperature pause furnace and furnace flue overtemperature alarm shutdown was stopped and the low hydraulic oil temperature alarm chain composition such as low water boiler stop, once the lock, without removal of boiler stop unlock after recovery, fault point are starting operation of the burner; In automatic control link, installed than apparatus, modules, safety barrier, and all kinds of relay, pressure and temperature sensors and signal transmission cables, parts damage, signals can be collected or transmission error signals, cause the burner control system data chaos, cause the burner to start or start of super WenChao pressure as a result of error signals after such accidents.

Marine boiler is an important factor that determines the safety and stability of shipping. In modern ships, diesel engines are mainly used as the main power output device for ship propulsion, and combustion equipment is used to provide good combustion conditions, so as to release the chemical energy of fuel to the maximum extent and convert it into heat energy. This mainly depends on the supporting equipment of the boiler, so the management and maintenance of the supporting equipment of the Marine boiler is paid more and more attention. General supporting equipment includes: burner, control box, oil pump set, water pump, water level control system and so on.

1) Check the installation of burner on boiler

Ensure that the installation is correct, safe and the flame is completely in the combustion chamber. The following shall be performed at least once a year before starting the burner :(1) set the fuel flow to ensure the heat required by the boiler; Regulating the flow of combustion air has obtained the required working range; (2) Check the situation of combustion, ensure that the toxic substances produced and the unburned gas content does not exceed the requirements of the current rules, confirm that the combustion product elimination is smooth.

2) start

(1) Start the thermal oil circulating pump, and make the pressure stable by circulating normally for about 0.5 hour after starting the pump; (2) Press the start button of the burner to observe whether the furnace flame is burning normally. If it is not ignited, the burner should be started again after troubleshooting.

3) Stop furnace operation

(1) Normal stop of furnace: In case of shutdown, after scavenging should be carried out first. At this time, the main fuel valve will be automatically closed and the main flame will be extinguished. The time of afterscavenging should be over 60s. (2) Gradually reduce the temperature, close the burner, stop burning; (2) Emergency shutdown of furnace. In case of emergency when the furnace is stopped, the burner should be shut down quickly, and the burner should be moved along the hinge shaft of the burner to form a natural ventilation state between the furnace chamber and the chimney to dissipate the heat storage in the furnace, so as to allow the thermal oil to cool naturally and prevent overheating.

4) Routine maintenance and precautions

(1) In order to optimize the characteristics of all aspects of the equipment, regular maintenance must be carried out, mainly including: atomizing cup -- daily removal of sediment on the surface and at the rear distribution hole; Fuel filter - remove the filter daily for cleaning; Igniter to clear sediments and reset electrode gaps every 3 months; Linkage -- Check screw tightness and lubrication support points every 3 months; Burner bearings - check for wear every 6 months; Burner cartridge heaters -- check electrical continuity every 6 months; Pressure switch -- checks every 6 months whether the setting value is equal to the debugging value; Motor bearings - wear and tear checked every 12 months; Modulating motor controller - Check potentiometer and brush every 12 months and replace if necessary.

5) Matters needing attention when using

(1) Operation to be reasonable, gently press the control button and switch; The operation of the burner should be carried out with extreme care and under strict monitoring, and the burner should never be run in an unsupervised state; (3) In order to ensure the safety of the operation of equipment, it is not allowed to repeatedly ineffective ignition of the burner, such as two consecutive ignition can not establish the flame, it should be found out the reason, and should be conducted for a long enough time after scavenged again ignition; (4) after routine maintenance or a long-term cease-fire, the need to re-test the burner.