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670t / h boiler coal pulverizing system causes the sharp increase in consumption and improving measures

668 Chih-4 Thermal Power Engineering in 2001 to take measures to reduce exhaust gas temperature. No. 4 boiler at low load to take to run the B side of the main milling system, while its four primary air tube damper closed. Although the exhaust gas temperature has decreased substantially, but a great impact on the output of each mill ball mill load is about 80I (designed to 100I), run time power consumption significantly,[link widoczny dla zalogowanych], thus increasing its efforts to shorten running time, reducing the consumption of electricity plant to be shut down significant parts of l1J an air duct damper open, but you can not fight the throttle open, the reason given for the corresponding powder machine is not running and a throttle fully open, the time wind speed will increase a lot. Coupled with the lower burner and the output of the low turnout is less. The lower burner at a relatively low temperature is not fully open to vote if the primary air pipe powder damper, the temperature will be a tremendous impact on the furnace lag, so you can control the powder is not cast an air duct damper is not opening more than 40%. People due to the increased amount of primary air furnace exhaust gas temperature will rise, so people should be strictly controlled amount of primary air furnace. Cold mixed people milling system (warm air) the more the air heater through the air flow more (in the same boiler load and oxygen conditions), the exhaust gas temperature increased, the primary air into the furnace control the amount of should contribute to a large mill was sung and its population of cold (warm air) f1 off Boiler No. 4 is the best low-load,[link widoczny dla zalogowanych], all of the top eight burners running, make excessive primary air furnace, which resulted in a doped side milling system's cold (warm air) above normal, the second steam boiler low-load to ensure the premise of steam temperature can be taken to stop the supply the upper part of the burner to the powder, while the other to increase the upper powder machine output, then an air duct damper off small, to reduce the amount of cold air mixed with one another not only the people milling system air leak increased the amount of primary air furnace, but also excluded the amount of added hot mill population, so the leakage should be milling system strengthening governance. If the mill gate and the atmosphere cold cold population, the door is not closed tight, dry and mill output to decrease air leakage, especially at low load air temperature is low, a greater impact on the milling system output. Milling system should be strengthened so that all throttle control adjustment to the actual opening and remote do the same general direction. Damper in the closed position, the damper of the baffle and the circular rigid duct seal between the inner wall, due to deformation, maintenance personnel and some other factors responsible, there may be air leakage problems. To solve this problem,[link widoczny dla zalogowanych], can take place in the wind, f the baffle wall circular duct gasket or seal paste, the type selected should be determined according to operating temperature, and both wear resistance, should be regularly replaced. One particular population of cold mill gate (warm air), atmospheric cold doors of mill and the total population of the door the wind shortcut governance, should be a top priority. Commonly used in a ball mill population decline in the drying tube, when the mill population, low temperature, it will decline in the coal-fired drying tube drying effects of variation, when people fired coal moisture content rises, it could Population product coal pulverizer. Since the interface milling system recycling drop drying tube in the export,[link widoczny dla zalogowanych], so hot and cold mill population (warm air) to become a drop of the desiccant drying tube. To solve the problem of coal pulverizer product of population, population by reducing the mill cold (warm air) mixed with human traffic, increasing air flow method of recycling a word, to solve the problem of coal pulverizer population plot, you can wear coal population dropped from 800 a l000Pa 400Pa, so the system can reduce leakage and increase the drying capacity mill. 5, No. 4 furnace-benefit analysis of using the opportunity to minor repairs + on a comprehensive governance milling system, according to the program changes the way the operation of pulverizing system, after a month of trial operation, although the exhaust gas temperature increased slightly, but the results of comprehensive sets or made significant social and economic benefits: (1) reduce the load of the boiler low power consumption milling system to address the low load sharp increase in the unit consumption of coal pulverizing system problems, milling system further decline in the average unit consumption the l ~ 2k Volume 1 / t (2) extend the life of the equipment, reducing equipment maintenance costs 6 Conclusion 670t / h boiler furnace to control the people should be a wind mill and its people for the maximum output LI cold (temperature wind) doors closed better, while maximizing mill boiler population, the lower the temperature to balance the problem of uneven output burners, thermal calculation should check the boiler and a steam system based on the results of the transformation. References: [1J CAO Wei-Kom system operation on the system down generous leavened temperature of Pai [JJ. Thermal Power Generation,[link widoczny dla zalogowanych], 2OOO (4) :45-462] Lien Chen. Principles of Building Boiler combustion equipment [M], Xi'an: Xi'an Electric Power School, 1986 (Hui edit)
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