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Analysis of dangerous points and preventive measures during deep peak shaving
Release Time:
2022-02-03
Peak shaving can also reduce the risks caused during peak shaving. Next, I will talk to you about the analysis of risk points and preventive measures during deep peak shaving.
Peak shaving can also reduce the risks caused during peak shaving. Next, I will talk to you about the analysis of risk points and preventive measures during deep peak shaving.
During the process of deep peak shaving, the fuel will also decrease, and the temperature inside the boiler will also decrease, and the combustion conditions will become more severe, making it very easy for the boiler to extinguish the fire. Therefore, during the period of deep peak shaving, the combustion cycle must also be adjusted. During the low load process, it is required that the calorific value received by coal should be greater than 108 kJ per gram and the moisture content generated by air drying should be greater than 24%. During the low load process, the primary air pressure must be maintained at around 8000 Pa, while the oxygen content should be maintained between 3.5 and 4%, which should not be too large or too small, to avoid combustion being weakened.
In the low load stage, the coal mill is prone to vibration. Therefore, it is necessary to keep the magic air volume relatively small and control the air pressure at the outlet at about 2000 Pa. If the load of a single equipment has decreased to 240 coal less than 120 tons per hour, the operation of the overhead coal mill can be based on the specific situation to ensure the concentration of pulverized coal and ensure stable combustion of the boiler.
During deep peak shaving, if the unit load is less than 250MW, it is required to switch the steam source of the small turbine. The process of switching the steam source should be carried out as soon as possible when the load is high. When switching the steam source, the electric valves from the high auxiliary to the small turbine must be opened intermittently, and close attention should be paid to checking that the action of the steam inlet regulating valve of the small turbine is normal, the speed and flow of the small turbine are stable, and preparations should be made for standby combined startup to prevent high auxiliary During the switching process of the four extraction units, steam leakage caused the small turbine to fail, resulting in a low feedwater flow protection action.
During deep peak regulation, when the flow of the feed pump approaches the opening value of the feed pump flow valve, the action of the flow valve should be closely monitored. Therefore, when the flow of the feed pump approaches the opening value of the feed pump flow valve, close monitoring should be conducted. If necessary, the feed pump flow valve can be opened to a fixed opening in advance to achieve the goal of stabilizing water supply, thereby better achieving the goal of deep peak regulation and maintaining voltage balance.
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We specialize in the research and development and production of clean heating products such as solid electric energy storage heating devices, high-voltage electrode boilers, air waste heat recovery machines, electric coal substitutes, wind power heating, and peak shaving.
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