Maintenance of the burner in the mixing plant

1. Fuel-fired burner

Filter - For fuel-fired burners, it is required to clean the basket filter between the oil tank and the oil pump. Regular cleaning of the filter can ensure that the fuel reaches the fuel pump smoothly and reduce the possibility of potential component failure. It is also necessary to check the filter for any signs of excessive wear or damage.

Pressure regulating valve - Inspect the fuel pressure regulating valve or pressure reducing valve to ensure that the surface of the lock nut on the adjustable bolt is clean and detachable. If the surface of the screws and nuts is found to be too dirty or rusty, the regulating valve should be repaired or replaced. A fuel regulating valve that lacks maintenance may cause the burner to malfunction.

Oil pump - Inspect the oil pump to ensure that its sealing device is intact and that the internal pressure can be maintained stably. Replace any damaged or leaking sealing elements. If hot oil is used, it is necessary to ensure that all the oil pipes are well insulated. If there are long oil pipes in the oil circuit, it is necessary to check whether the installation route is appropriate. Replace the damaged and poorly insulated oil pipes.

Burner - For fuel-fired burners, clean the "y" type filter. Good filtration effect on heavy oil and residual oil is the key to preventing clogging of fuel injectors and valves. Check the pressure difference on the burner to see if it is working properly and if the oil pressure is within the appropriate range. This can ensure that the fuel pressure can be accurately read after adjusting the burner. Adjust the extension length of the atomizer on the oil nozzle, and regulate and test the low oil pressure switch.

When using heavy oil, check the fuel heating and control devices, and inspect the oil temperature switch on the burner tube group. Consult the manufacturer about the required oil viscosity to ensure the normal operation of the burner, and regularly check whether the viscosity of the heavy oil or residual oil used meets the requirements.

It is also necessary to clean and lubricate the connection of the lubricating oil valve. If the connection is stuck or too rough, it needs to be repaired or replaced with suitable parts.

Finally, clean the oil nozzle regularly as required by the manufacturer.

2. Natural gas burner

Main gas source - For burners fueled by natural gas, check the main gas source regulating valve to ensure the integrity of the circuit. Do not adjust the regulating valve of the gas company. The gas company will assist in cleaning, maintaining and adjusting the regulating valve of the main gas source. If there are sensor lines, check whether they are damaged.

Filter - If a "y" type filter is installed before the control regulating valve, special attention should be paid to cleaning it.

Control regulating valve - Check the control regulating valve on the gas burner to see if the regulating bolts are easy to adjust. Make sure that all the outlets and screens are not blocked.

Burner - Check the gas pipe group and confirm whether the manual switch adjustment is sensitive and whether the valve handle is installed. Check whether the barometer is working properly. When adjusting a gas burner, an accurate pressure display is crucial. Rotate the low-pressure and high-pressure switches to confirm their working conditions. The connection points of the air valve need to be cleaned and lubricated. If the connection points are stuck or too rough, suitable parts should be replaced. If the burner is equipped with detachable pipelines, cleaning should also be paid attention to.

3 Burners for other fuels

In addition to the above-mentioned fuels, there are many other types of fuels used for burners. Burner manufacturers can assist in providing maintenance schedules and procedures for burners when using other fuels, and determine the best maintenance plan.

4. Do not neglect the supply of oxygen

Once the maintenance plans for the fuel supply system and burners have been determined, the oxygen supply volume of the system should be checked. The oxygen supply for most burners is achieved through a fan or a combined fan system.

Compressed air - Many burners require compressed air to operate normally. First, check whether the compressor can provide the pressure required by the burner. Clean all the filters on the pipeline and check if there is any leakage in the pipeline. If so, repair it in time.

Combustion/atomization air blower - Check whether a protective device is installed at the inlet of the combustion or atomization air blower and whether the working environment meets the requirements. Repair the leakage and damage of the fan casing. Observe the operation of the blades to see if there is too much noise or vibration. If so, it can be eliminated by adjusting the blades. Check the connecting pipe between the air outlet of the fan and the air inlet of the burner, and repair any possible leakage.

For belt-driven blowers, it is necessary to apply lubricating oil to the bearings regularly and tighten the belt. Determine that the blower can generate the rated pressure and test the current intensity. Clean and lubricate the connection points of the air valve, and adjust the valve to check if the operation is smooth.

Main fan - Check whether protective devices are installed at the inlet of the main fan and whether the working environment meets the requirements. Repair any leakage points on the fan. Observe the operation of the blades to see if there is too much noise or vibration. If such phenomena occur, they can be eliminated by adjusting the blades.

In addition to ensuring that the required air pressure is met, cleaning and lubricating the connections, adjust the air valve to check if the operation is smooth.

Induced air (exhaust air) - Confirm whether the exhaust damper control is working properly and whether the Settings are correct. Lubricate the connection of the damper to see if it operates smoothly. Check the wear condition of the damper blades.

Ignition device - Clean the oil nozzle of the ignition device and confirm whether the spark gap of the ignition electrode is normal.

Components - Clean the flame detector, determine whether its observation position is appropriate, and whether it is cooled correctly.

5. Coordination between the burner and other parts of the system

The maintenance procedures of the burner include the commissioning of the burner. A well-debugged burner will be able to achieve higher working efficiency. Portable combustion analyzers can provide accurate information on the working conditions of burners. Typical burner commissioning methods include fuel analysis and a series of adjustments that can enable the burner to achieve optimal operating performance while maintaining combustion power. Basic debugging can be completed in one day or less and before various tests are carried out.

It is particularly important to debug the burner after the complete burner maintenance procedure is completed, especially in the early stage when the equipment is put into operation. The burner should be debugged under normal conditions. Fuel samples should be extracted from the fuel tank so as to effectively and accurately describe the working condition of the burner.

The commissioning of the burner is carried out based on the sampling information of the combustion flue gas. Any adjustment to the air or fuel will affect the flue gas emissions. The components of the flue gas can be studied and the combustion efficiency can be analyzed based on this. The following table lists the combustion products and their causes of formation.

Regular burner maintenance procedures are necessary to avoid shutdowns and extend the lifespan of the combustion system. Combining some of the steps listed above with the suggestions provided by the burner manufacturer can determine an effective maintenance procedure. This not only reduces the losses caused by shutdowns due to malfunctions but also improves combustion efficiency and saves fuel costs