Thermal power plant boiler exhaust heat recovery and utilization system
A waste heat recovery, thermal power plant technology, applied in preheating, lighting and heating equipment, indirect carbon dioxide emission reduction and other directions, can solve problems such as reducing power generation capacity and reducing economic benefits, reducing boiler energy consumption, improving boiler efficiency and effectiveness significant effect
Inactive Publication Date: 2015-07-29
上海成信设施科技有限公司 +1
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Problems solved by technology
In this case, compared with the case without a heater, if the temperature of the cold air is increased, the temperature of the air entering the boiler will increase, thereby improving the efficiency of the boiler, but the power generation capacity will be reduced due to the use of high-grade steam extraction by the steam turbine. , comprehensively considered, reduces the economic benefit
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[0022] Such as figure 2 As shown, the waste heat recovery system for thermal power plant boilers includes a boiler 10, a fan 11, an air preheater 12, a dust collector 13, an induced draft fan 14, a booster fan 15, a desulfurization tower 16, a chimney 17, a steam turbine 20 and a heat recovery system 22, the heat recovery system 22 includes a condenser 23 and several condensed water heaters 24 connected in series, the steam output end of the boiler 10 is connected to the steam input end of the steam turbine 20, and the condensed water output end of the steam turbine 20 is connected to the The input end of the heat recovery system 22 is described, and the output end of the heat recovery system 22 is connected to the condensate input end of the boiler 10. This system also includes an air heater 7, a high temperature heat exchanger 3, a first low temperature heat exchanger 4, a second A circulating pump 71, a first flow control valve 31, a second flow control valve 32 and a thir...
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The invention discloses an exhaust waste heat recycling system of a power plant boiler. An air heater is connected in series to a boiler air input cold air duct, a high-temperature heat exchanger is connected in series between an induced draft fan and a booster fan of a boiler smoke flue, a first low-temperature heat exchanger is connected between the booster fan of the boiler smoke flue and a desulfurizing tower, the condensed water input and output ends of the high-temperature heat exchanger are respectively connected in series between condensed water heaters through flow control valves, and the first low-temperature heat exchanger is connected with the medium input / output end of the air heater through a circulating pump. According to the system, the exhaust waste heat recycling effect of the boiler is remarkable, the efficiency of the boiler is effectively improved, the energy consumption of the boiler is reduced, and relatively high economic benefit is gained.
Description
technical field [0001] The invention relates to a system for recovering and utilizing waste heat from exhaust smoke of a boiler in a thermal power plant. Background technique [0002] Coal-fired boilers in thermal power plants provide the power generation energy of the generator sets, and at the same time a large amount of heat energy is discharged with the boiler chimney; under the background of vigorously advocating energy conservation and emission reduction, how to reduce the loss of heat energy in the exhaust of coal-fired boilers in thermal power plants, so as to save energy , Protecting the environment is of great significance. The exhaust gas loss during boiler operation is the most important heat energy loss. If the exhaust gas heat of the boiler can be recovered to the maximum extent and utilized in the generator set, the boiler operation efficiency and economic benefits can be improved. [0003] Such as figure 1 As shown, the air from the boiler 10 is usually inp...
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IPC IPC(8): F23L15/00F22D11/06
CPCY02E20/34
Inventor 袁一军王金旺
Owner 上海成信设施科技有限公司