Questions&Answers

How to Deal with the Increase of Noise in the Work of Gas Boiler Burners?

(1) Check whether the valve in the pipeline is open and whether the oil filter is working normally, and clean the filter screen of the oil pump.

(2) Raise or lower the oil temperature

(3) Replace the oil pump

(4) Replace the motor or bearings

(5) Replace the blower impeller

What are the Reasons for the Increase of Noise in the Work of Gas Boiler Burners?

The stop valve in the oil circuit is closed or the oil intake is insufficient, or the oil filter is blocked.

The oil temperature at the inlet is too low, or the oil viscosity is too high, or the temperature in the oil pump is too high.

Oil pump damage

The blower motor bearing damaged

The blower impeller is too dirty

Precautions for Cleaning Burner Components.

Remove dirt from the flame stabilization plate, open up gaps, and remove carbon deposits from the electrodes.

Use carburetor cleaner to clean oil nozzles, spray heads, tubing, suction tubing. If the oil pipe and suction pipe wall accumulated scale, use strip object to clean and through.

Remove the oil dirt on the heating wire and temperature sensor, and remove the oil mud at the bottom of the heating oil pool.

Clean the filter tank and filter screen, empty the oil storage tank, remove the bottom oily sludge, and clean the tank.

The purging function of the burner before and after starting is normal, but what is the reason for the failure to ignite?

(1) Insufficient gas supply at ignition
(2) Main solenoid valve or ignition electronic valve is not working properly
(3) Solenoid valve damage
(4) The supply pressure is unstable
(5) Excessive air volume

The filter is used to filter out impurities and oil in the fuel gas to ensure the normal operation of the burner valve group. According to the quality of gas, the filter should be cleaned regularly. If wet gas is used, the air inlet valve can be closed periodically, the valve under the filter can be unscrewed, and the settled liquid can be discharged into a special container for dumping. Then, the upper cover can be removed, and the fastening screws of the filter screen can be loosened to remove the filter screen and the attached dirt. If clean dry gas is used, the cleaning cycle can be extended.

Cause of failure:

a. The air volume is too small

b. The air humidity is too high.

c. The exhaust temperature is low.

Solutions: (1) Turn down the damper. (2) Reduce the air volume appropriately and increase the inlet air temperature. (3) Take measures to increase the exhaust temperature.

1、The fan shaft is not concentric with the electrode shaft.

2、The rigidity of the foundation or the whole support is not enough.

3、Loose impeller bolts or rivets and deformation of impeller.

4、The impeller shaft disc hole is loosely matched with the shaft.

5、The connecting bolts of casing, bearing seat and bracket, bearing seat and bearing cover are loose.

6、The blade has dust, dirt, blade wear, impeller deformation and shaft bending, which makes the rotor unbalanced.

7、Poor installation of the inlet and outlet pipes of the fan causes resonance.

Possible reasons:

1、The control box may be faulty (damaged).

2、It may be a malfunction of the combustion engine motor. The motor can't start, except that the motor coil or capacitor is damaged, it may also be a bearing problem, perhaps the wind impeller is stuck and can't rotate.

Possible reasons:

1、It may only be a minor problem, such as the power supply is not connected. It may also be that the ball valve of the gas switch has not been opened or the gas pressure is insufficient (lower than the set value on the gas low-pressure switch)

2、Please check the fuse of the power supply, and check the temperature of the thermostat for the gas burner. If the burner is connected with other automatic control devices at the same time, please check whether there is no power supply to the burner due to the influence of these devices.

3、Please check whether the voltage is normal. The burner control box basically has a under-voltage protection function. When the voltage is too low, the burner cannot be started.

4、Please check whether the control box of the burner is firmly inserted into the socket, and also check whether the power supply wiring is loose or not.

5、The control box may be faulty (damaged).

Possible reason:

• The clearance of cyclone ventilation is blocked by carbon deposit, which leads to poor ventilation.
• Nozzle is dirty, blocked or worn.
• The throttle setting angle is too small.
• The distance between the tip of the ignition match and the leading edge of the oil nozzle is not appropriate (too protruding or retracted).
• Oil gun solenoid valve is blocked by sundries (small oil gun).
• The oil is too viscous to flow easily, or the filter system is blocked or the oil valve is not opened, so that the oil pump does not absorb enough oil and the oil pressure is low.
• The filter screen of the oil pump itself is blocked.
• There is too muchwater in the oil (abnormal boiling noise in the heater).

Treatment measures include:

• Cleaning; Clean it first, if problem notfixed, replace a new one; Turning down test; Adjust the distance (preferably 3~4mm); Remove and clean (clean the parts with diesel oil); Check the pipeline, oil filter and thermal insulation equipment; Remove the peripheral screws of the oil pump, carefully remove the outer cover, take out the oil net inside, and soak it with diesel oil; Try it with new oil.

Possible reasons:

The cut-off valve in the oil circuit is closed or the oil intake is insufficient, or the oil filter is blocked.

The oil inlet temperature is low, the viscosity is too high or the oil inlet temperature of the pump is too high.

The oil pump is out of order.

The bearing of the fan motor is damaged.

Fan impeller is too dirty.

Solutions: 

① Check whether the valve in the oil pipeline is open, whether the oil filter works normally, and clean the filter screen of the pump. ② Raise or lower the oil temperature. ③ Replace the oil pump. ④ Replace the motor or bearing. ⑤ Clean the fan impeller.

On the one hand, the mixing, mass transfer and heat transfer caused by the entrainment of high-temperature flue gas in the furnace by airflow. On the other hand, the high-temperature flame radiation heat exchange in the furnace. Among them, the entrainment of pulverized coal airflow is the main one.

Change some adjustable parameters and control modes (i.e. fuel supply mode and air distribution mode) in a planned way, comprehensively adjust the combustion conditions and measure some single index values, and then scientifically analyze the obtained results, compare them from the aspects of economy and safety, determine the best operation mode and calibrate the operation characteristics of the equipment. Such experiments, measurements, analysis and research work are boiler combustion adjustment tests.