The main different classifications of braize coal pulverized coal burners
The braize coal pulverized coal burner is a combined machine of hammer mill crushing and centrifugal blast, which can grind raw coal less than 20 mm into fine powder and spray it into the furnace for combustion. The pulverized coal burner can reduce coal consumption and increase the heat utilization rate. During equipment maintenance, check the bearing lubrication condition of the front and rear bearing chambers of the main engine. If grease is deposited, clean it and replace with new grease. It depends on whether the bearing wear condition is confirmed or not and whether it is replaced. Start sequence, start the electric vibrating coal feeder after the motor of the pulverized coal machine is normal. Stop sequence, stop the coal feeder for about 3-5 minutes and then turn off the pulverized coal machine. Pay attention to electrical instrument prompts during equipment operation and observe the equipment operating conditions. If abnormalities are found, stop and inspect immediately, check whether the bolts of each component are loose, and the amount of lubricating oil in the front and rear bearing chambers. The equipment should be injected into the front and rear bearing chambers for 24 hours of continuous operation. Lithium-based grease oil, check whether the return pipe at the bottom of the pulverizer separator is unblocked, if it is blocked, it should be cleared in time, and the equipment can be operated after inspection. The maintenance work must be frequent. After each shutdown, check whether the bolts of each part of the machine are loose or not. The looseness must be firm. Check the amount of lubricating oil in the front and rear bearing chambers of the main engine, and refill it on time. The bearing chamber uses a shaft gun to the end cover oil nozzle Inject lithium-based lubricants.
There are three main types of pulverized coal burners:
1. Single-layer pulverized coal burner, its shell is single-layer, and the plate is 0.8mm thick. Its principle is to inject into the burner through a pulverized coal machine. The shell is equipped with an oxygen fan to assist in blowing. The cost is relatively small, so the price is cheaper, but one thing is that the single-layer shell will heat up during use. This is a bit flawed and does not affect arbitrary use.
2. Double-layer pulverized coal burner. Its shell is double-layered. The main purpose of the double-layer is the effect of heat insulation. The auxiliary blower of the fan in the interlayer will reduce the temperature of the shell of the pulverized coal burner. Reducing the temperature does not mean that there is no temperature, it has the same effect as the use of a single layer.
3. Rotating the pulverized coal burner means that the main engine keeps running at a low speed during use, so that the stability of the air volume is determined, and the drying can be done smoothly. Its function has an advantage. The main engine keeps running. There will be no accumulation of debris in the pulverized coal burner.
The pulverized coal burner is compact, occupies a small area, saves electricity consumption (about 50~75% of the low-speed pulverized coal burner), low noise, light and sensitive operation control, etc.; but the structure and manufacturing are more complicated, and the maintenance cost is more complicated. Larger and not suitable for grinding harder coal. This product can reduce the labor intensity of personnel, reduce costs, improve economic efficiency, and achieve indicators. The pulverized coal burner firstly grinds the coal, and then sends the ground pulverized coal that meets the standard into the combustion furnace, so that the pulverized coal is fully burned, and the purpose of energy saving is achieved.
Pay attention to the electrical instrument prompts during the operation of the coal mill and powder sprayer. Observe the operating conditions of the equipment. If an abnormality is found, stop and check immediately, check whether the bolts of each component are loose, and the amount of lubricating oil in the front and rear bearing chambers. The equipment should be operated continuously for 24 hours. Inject lithium-based grease into the front and rear bearing chambers, and check whether the return pipe at the bottom of the coal sprayer separator is unblocked. If it is blocked, it should be cleared in time. After checking that the equipment is normal, the production can be started. Coal-pulverized coal injection machines are commonly used in: dryer coal injection machines, coal injection machines, rotary kiln coal injection machines and other supporting equipment.
1. The coal grinding mechanism of the coal powder injection machine is that the raw coal enters the grinding area of the grinding roller and the grinding disc, and is ground into pulverized coal under the rolling mill of the grinding roller.
2. The loading force of the grinding roller is an important parameter for the economic operation of the coal mill. As the loading force of the grinding roller increases, the grinding pressure of the grinding roller increases, the pulverized coal becomes finer, the coal output increases, and the characteristic coefficient of pulverized coal particles becomes larger. , The unit consumption of coal grinding is reduced, but the vibration of the coal mill equipment is intensified, the wear is too fast, and the service life of the grinding parts is reduced.
3. The coal-grinding and powder spraying machine has the characteristics of smashing and conveying the supply and other technological processes, which can be completed at one time.
