How to reduce the fly ash combustibles of the steam generator?
How to reduce the fly ash combustibles of steam generators
Introduce how to reduce the fly ash combustibles of the steam generator:
1. Minimize the fineness of pulverized coal while ensuring the output of the milling powder.
2. Appropriately reduce the primary air pressure to increase the primary air temperature as much as possible.
3. Ensure sufficient secondary air volume. The intermediate air baffle opening is appropriately opened while the combustion is kept stable to sufficiently mix the wind powder.
4. Under the condition of ensuring steam temperature, steam pressure and load, reduce the rotation speed of the upper layer powder feeder and increase the rotation speed of the lower layer powder feeder.
5. Appropriately increase the temperature of the powder pulverized coal.
6. Avoid the occurrence of coal and coal breakage in the milling system as much as possible, ensure the stability of the operation of the milling system, maintain reasonable ventilation and reduce the air volume.
7, can not blindly pursue reheating temperature and put the fire mouth too high, the price of energy-saving steam generator, the flame center moves up, causing the pulverized coal to stay in the furnace to reduce the time can not burn out;
8. Reasonably control the oxygen content of the furnace at 4~6 °C, so that the combustion is fully burned in the furnace;
9, reduce the fineness of pulverized coal, should be controlled in the fineness of coal ash, generally control fineness of pulverized coal <10%
10. Reasonably control the opening of the secondary wind small damper; ensure a suitable secondary air pressure;
11. Reasonably control the speed of the coal feeder, that is, the concentration of coal powder
12. Minimize the number of coal breaks in the coal feeder. After the coal is broken, organize personnel to deal with it in time to make the coal come into normal;
13. In a class, too many times to start or stop the coal mill will also increase the fly ash combustibles;
14. Regularly blow the ash to keep the boiler in good working condition.
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