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Plasma ignition boiler safety operation


Burning normal monitor display. Found poor combustion, furnace pressure fluctuations, one should quickly adjust the amount of air flow and adjust the combustion of coal. If results are poor, investment in oil gun combustion. If combustion is still not good, should immediately stop the blood to the coal phase, if necessary, stop the plasma generator, well-ventilated, identify the cause before making investment. The boiler before firing the corresponding plasma ignition device mill should be set at \Early in the boiler ignition, as a result of burning coal or other causes of instability, there flashing and furnace pressure fluctuations in the flame, should be put into the gun with oil burning, combustion stability until after the timely withdrawal of the oil gun, in order to facilitate fuel . In the \TM Ji pot, the way of protection action by FSSS,[link widoczny dla zalogowanych], while all the plasma generator trip, and ban Kai. Off the oil boiler load to above the negative Ya, who bleed at the nose to run the operating mode in time to switch to the mill \2.4 The rear of the boiler to prevent the occurrence of strictly secondary combustion beginning of each plasma ignition O. 5h test fly a fuel, ignition within 0.5h l gray hair should generally be less than 35%; ignition within 1.0h 1 {- gray zone containing fuel should generally be less than 25%; ignition fly ash more than 2.0h should generally be less than 15%. Such as fuel over and above the value of fly ash, should be adjusted first and second wind, mill output, coal fineness, flow distribution between the various tubes, ignition replacement of coal power so that, as far as possible to improve combustion. Coal and air mixture to prevent improper, the first and second air volume is too small, the deposition of the fuel into the tail; or a. Shu secondary air is too large,[link widoczny dla zalogowanych], then into the flue duct as well as the amount of fuel too. Plasma ignition process, the air preheater soot blowing device must be put into operation, before blowing a full drainage, and prevent the hydrophobic zone, causing preheater block. Case of the following cases, should increase the number of air preheater as well as continuous soot blowing: fuel type deviation from the design value, or larger changes and larger coal ash, burning bad time; plasma burner is not normal operation, the combustion unstable when the co-combustion of coal by oil; when the fuel is greater than 15% fly ash, after the adjustment can not effectively reduce the time; air heater differential pressure increases, import and export. Air heater is running, found that \If the reset signal can not afford to, should strengthen the air preheater soot blowing, air preheater body check, but to contact about maintenance staff. If the boiler longer stable combustion at low load plasma combustion of coal or oil, according to the specific circumstances of use of the shutdown of the air preheater, electric dust collector, hopper departments to check if there are questions to be a timely manner. To prevent fuel leakage after shutdown and in the end were the accumulation of the furnace; shutdown and post-MFT to fully purge the furnace, to avoid unburned coal or oil accumulation in the tail. Boiler startup, ministries should ensure liF rear flue temperature monitoring NiE often, should always check the air heater smoke, air side pressure and the import and export of tobacco,[link widoczny dla zalogowanych], air temperature, always check the air preheater hot spot detection system situation. When the flue gas temperature exceeds the limit operating procedures should be immediately shutdown. 2.5 units of plasma ignition start curve must meet the requirements of the initial amount of coal into the boiler operating conditions should be less than BMCR 8% of the total amount of coal to light after the power control and then put under the total input power to the BMCR 5%. The plasma ignition device put into operation,[link widoczny dla zalogowanych], it is necessary to observe the rate of increase in the boiler steam pressure and superheater, reheater temperature rise, according to the boiler-liter or Yu-curve,[link widoczny dla zalogowanych], by adjusting the unit bypass valve opening system, Boost Platinum J boiler control, heating rate. 2.6 Avoid over-temperature plasma burner, the incidence of failure of coke plant put into operation the plasma ignition process, should be closely monitored plasma burner wall temperature, and record. Wall temperature control to advance, or to control the temperature lower, the burner wall temperature over 400oC or above 300oC, but when the wall temperature is still rising rapidly, and the state should take measures to reduce the wall temperature, including reduced mill output, plus the entrance of a large amount of wind mill, lower plasma generator power, etc., the burner wall temperature exceeds 500 ℃, the angle of inspection should be stopped. Plasma ignition in the state, the coal pulverizer should be controlled plasma ignition state power range for the design of the burner, such as the coal burner design efforts over the same range, should be taken to gradually increase the amount of coal the way The increase is about 2t / h, stable 1 ~ 2h, and closely monitor changes in the burner wall temperature. Stable combustion in the boiler when the low load, plasma ignition device input, King Mill coal burner should be strictly controlled in the plasma state within the same range of design efforts
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