Construction, maintenance and use of asphalt mixing building burners

1. Maintenance of burner

(1) Pressure regulating valve

Periodically check the fuel pressure regulating valve or pressure reducing valve to make sure that the locking nut surface on the adjustable bolt is clean and removable. If the surface of the screw or nut is too dirty or rusty, repair or replace the regulating valve.

(2) the oil pump

Check the oil pump regularly to make sure whether the sealing device is in good condition and the internal pressure is stable. Replace the damaged or leaking sealing device. When using hot oil, check that all tubing is well insulated.

(3) Filters

The filter installed between the tank and the oil pump should be cleaned regularly and checked for excessive wear to ensure the oil tank reaches the pump smoothly and reduce the possibility of failure of potential components. Especially when using heavy oil or residuum, can prevent the nozzle and valve plug. When working, check the pressure gauge on the burner to see if it is within the normal range.

(4) Pressure device

For burners that require compressed air, check the pressure unit to see if the required pressure is generated within the burner, clean all filters on the supply line and check for leaks in the line.

(5) fan

Check whether the inlet protection device on the combustion and atomizing air blower is properly installed and whether the fan housing is free from damage and leakage. Observe the operation of the blade, when the noise is too large or vibration, the blade can be adjusted to eliminate. To the blower that belt wheel drives, want to lubricate bearing regularly and tighten belt, make sure blower can produce rated pressure. Clean and lubricate the air valve connection to see if it is smooth and replace parts if there is a malfunction. If the wind pressure is too low, it will cause tempering, which will lead to overheating of the guide plate at the front end of the drum and the feeding plate in the combustion area. If the wind pressure is too high, the current will be too large, the temperature of the cloth bag will be too high and even the bag will be burnt.

(6) Fuel nozzle

The nozzle should be cleaned regularly and the spark gap of the ignition electrode should be checked (about 3mm).

(7) Flame detector

Always clean the flame detector (electric eye) to make sure whether the location is installed correctly, the temperature is appropriate, the location is out of alignment and the temperature is too high will cause the photoelectric signal instability, or even break the fire.

2. Rational use of burning oil

Combustion oil is divided into light oil and heavy oil according to viscosity grade. Light oil can obtain good atomization effect without heating. Before using heavy oil or residuum, the oil should be heated to ensure that the oil viscosity is within the allowable range of the burner. The viscometer can be used to measure the results and find the best heating temperature of the fuel.

The burner should be checked and adjusted after heavy oil or residuum has been used for a period of time. Combustion gas analyzer can be used to determine whether the fuel is fully burned, and at the same time, check the drying drum and bag dust remover to see whether there is oil mist or oil smell, in order to avoid fire and grease blockage. The accumulation of grease on the atomizer will increase with the deterioration of the oil product, so it should be cleaned regularly. After the work is over, the burner switch should be turned off first, and then the heavy oil heating should be turned off. The oil valve should be changed when the machine stops for a long time or it is cold. The oil valve should be cleaned with light oil, otherwise the oil will be blocked or difficult to ignite.