The Reasonable Selection Of Burner

Changes at the same time occurred in the demand for fuel to the burner, the quality requirements are increasingly high, good ignition performance, high combustion efficiency, wide regulating ratio, often is the construction unit target. But many different manufacturers, brand burner, only suitable to meet the above requirements.

Using 1 different types of burner

According to the 1.1 burner atomization mode is divided into medium pressure atomization, atomization, rotary cup atomization

(1) pressure atomization is the fuel to the combustion with oxygen nozzle atomization by high pressure pump, which is characterized by uniform atomization, simple, less consumables, low cost, most of the current road construction machinery are made of the atomization models.

(2) medium atomization by 5 ~ 8kg of compressed air or pressure vapor pressure and nozzle peripheral and fuel is premixed combustion, characteristic is not high requirements of fuels (such as oil, poor oil), but consumption goods more, higher costs, the current road machinery industry with the models less.

(3) cup atomization is through a high speed rotating cup (about 6000 RPM) will fuel from atomization. Can burn poor oil, such as high viscosity oil etc.. But the machine is expensive, and the easy to wear, the debugging requires very high. At present, road machinery industry basically do not have this type.

1.2 burner by the machine structure can be divided into one gun type machine and split type machine gun

(1) one gun type machine is that the fan motor, oil pump, chassis and other control elements are combined in one, and has the characteristics of small volume, adjusting the ratio is small, typically 1:2.5, multiple high voltage electronic ignition system, low cost, but high requirement for fuel quality and environment. The material in the 120t/h and to the diesel fuel equipment can use such models, such as the German "weasel".

(2) split gun type machine is to host, fan, pump group, control components into four independent institutions. Characteristics of large volume, high output power, the gas ignition system, regulation is relatively large, generally is 1:4 ~ 1:6, and even up to 1:10, the noise is low, not high on quality and environmental requirements of fuel. Domestic and foreign construction industry more choice of this type, such as "Parke", "Tanaka", "Japan Italy ABS".

Composition of 1.3 burner

Automatic control of burner can be divided into the air supply system, fuel supply system, control system, combustion system.

(1) the air supply system

Fuel to burn completely to provide enough oxygen, different fuels have different requirements such as air, No. 0 diesel oil standard atmospheric condition per kg of oil to burn completely to 15.7m3/h air distribution. Calorific value is 9550Kcal/Kg heavy oil to burn completely to 15m3/h air distribution.

(2) fuel supply system to complete combustion must have reasonable combustion space and mixed space. Transportation fuels can be divided into high pressure transmission and low pressure. The pressure nozzle with high pressure transmission, pressure is 15 ~ 28bar. Rotary cup atomizer burner adopts low voltage transmission, pressure is 5 ~ 8bar. At present, the fuel supply system of road machinery industry with high pressure transmission mode.

(3) control system for construction machinery industry due to its special working condition of the burner with mechanical control, proportional control mode.

(4) combustion system, the combustion flame shape completely depends on the combustion system. The burner flame diameter generally require less than 1.6m, adjust the width as well, generally is 1:4 ~ 1:6. Flame diameter is too large can cause serious coking furnace tube, long flame will lead to exhaust temperature exceed the standard and damage the dust bag, will also feed bake coke or make the material screens on the greasy. To my unit 2000 asphalt mixing plant as an example: drying cylinder diameter 2.2M, length 7.7m, maximum diameter is not greater than 1.5m, the flame, the flame length is best within 2.5 ~ 4.5m adjustable.

Maintain the 2 Burner

(1) the pressure regulating valve

Regularly check the fuel pressure regulating valve or pressure relief valve, determine the adjustable nut surface is clean and remove lock bolts. Such as a screw or nut surface too dirty or rust, repair or replacement of valve.

(2) pump

Regularly check the pump sealing device is intact, to determine the internal pressure is stable, the replacement of damaged or leak sealing device. The use of oil, should check whether the insulation good all tubing.

(3) is arranged between the oil tank and oil filter should be cleaned regularly and check for excessive wear, can ensure that the fuel from the tank to reach the oil pump, and reduce the potential for component failure. The burner on the "Y" type filter should be cleaned regularly, especially using heavy oil or residual oil, can prevent the nozzle and the valve plug. When working, pressure table to check on the burner, to see whether in the normal range.

(4) to the burner of compressed air, to check to see if the pressure device produces the desired pressure in the burner, cleaning supplies on the line all filter and check whether the pipeline leakage.

(5) check combustion, entrance protection device for atomizing air blower is installed correctly, the fan housing is no damage and leakage. Observe the running condition of leaf, too much noise or vibration, adjustable blade to remove. The blower for belt drive, periodically to the bearing lubrication and tighten the belt, determine the blower can produce rated pressure. Cleaning and lubricating air valve connection, see whether smooth running, running a barrier to replacement parts. Determination of pressure meets the requirements, the pressure is too low will cause tempering, to guide the front end of the cylinder and combustion zone dial plate heat, pressure is too high will make the current is too large, the temperature is too high or even scorched bag.

(6) the nozzle to be cleaned regularly, check the ignition electrode spark gap (about 3mm).

(7) clean flame detector (eye), determine the location is correctly installed, temperature is appropriate, malposition and the temperature is too high will cause the photoelectric signal is unstable, even off the fire.

The rational use of 3 burning oil

Burning oil according to the viscosity grade is divided into light oil, heavy oil. Light oil without heating can obtain good atomization effects, the oil is heated to ensure that the viscosity of the oil within the allowable range burner heavy oil or residual oil before use, can use viscometer measurement result and find the best fuel heating temperature. Residue samples to advance to test its calorific value.

Heavy oil or residual oil after a period of use, to check and adjustment of the burner. The combustion gas analyzer to determine whether the available fuel combustion, and check the drying drum and bag dust collector, to see whether there is oil mist or oil, to avoid fire and oil plug. The accumulation of oil atomizer will increase with oil variation, so regular cleaning.

The use of residual oil, oil tank outlet positions should be higher than the bottom of about 50cm, to avoid the oil tank bottom sediment water and debris into the fuel line. The fuel to the burner, to be filtered using 40 objective filter, filter on each side of an oil pressure gauge to ensure good filter, can be found in time and cleaning in the jam.

In addition, after the end of the work, should first turn the LB2000 Asphalt Mixing Plant burner switch, and then close the heavy oil heating, should switch circuit valve long time shutdown or in cold weather, clean the oil with light oil, otherwise it will cause the circuit poor or difficult ignition.

4 Conclusion

In today's rapid development of highway construction enterprise, effective use of combustion system not only prolongs the service life of machinery, but also reduce the engineering cost, save a lot of money and energy.