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Double-circulation heating system and double-circulation heating method for low-low temperature economizer

A low-low temperature economizer and heating system technology, applied in feedwater heaters, lighting and heating equipment, preheating, etc., can solve problems such as inability to rationally utilize the waste heat of flue gas, reducing boiler exhaust gas temperature, and hidden dangers in operation, etc. Achieve the effect of avoiding heat shortage, saving coal consumption and more waste heat

Inactive Publication Date: 2017-08-08
山西中源科扬节能服务有限公司
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Problems solved by technology

[0004] At present, power plants reduce boiler exhaust gas temperature and recover flue gas waste heat in the form of heating condensed water alone or combining heaters to heat primary air and secondary air, which cannot make reasonable use of flue gas waste heat, and there are certain safety hazards in operation. Serious waste of heat, sometimes resulting in a lack of heat

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  • Double-circulation heating system and double-circulation heating method for low-low temperature economizer

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Embodiment Construction

[0028] The low-temperature economizer double-circulation heating furnace air and condensate water system of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] Such as figure 1 As shown, the low-temperature economizer double-cycle heating furnace air and condensed water system of the present invention includes a water-water heat exchanger 1, a booster pump 2, a low-low temperature economizer 3, a steam-water heat exchanger 4, and a primary air heater 5. Secondary air heater 6. Condensate flow regulating valve 7. Heat medium water temperature sensor at the outlet of the water-to-water heat exchanger 8. Condensate temperature sensor at the outlet of the water-to-water heat exchanger 9. Water volume regulating valve at the inlet of the low and low temperature economizer 10. Steam inlet regulating valve of steam-water heat exchanger 11. Primary heater inlet water regulating valve 12. Primary heater air duct outlet air tempe...

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Abstract

The invention provides a double-circulation heating system for a low-low temperature economizer, and belongs to the technical field of energy saving. The double-circulation heating system for the low-low temperature economizer comprises an intake furnace air heating system and is characterized in that the double-circulation heating system further comprises a condensed water heating system, the intake furnace air heating system and the condensed water heating system are connected to the low-low temperature economizer through a booster pump and a water quantity regulation valve. According to the double-circulation heating system for the low-low temperature economizer, the air supply temperature of a boiler is increased and the condensed water system is heated while the smoke temperature at an electric precipitation inlet can be decreased, and the purposes of safety, stability and multi-application of waste heat are achieved.

Description

technical field [0001] The invention belongs to the energy-saving technology, in particular to the technical field of waste heat recovery from flue gas of power plant boilers. Background technique [0002] As the country pays more and more attention to energy conservation and environmental protection, it is becoming more and more urgent to improve the thermal efficiency of boilers. Among them, the use of waste heat from boiler exhaust is one of the most effective ways. The exhaust heat loss depends on the exhaust temperature and the exhaust gas volume. The boiler model is certain, and the exhaust gas volume is determined. [0003] At present, most of them reduce the heat loss of flue gas by reducing the exhaust gas temperature. Studies have shown that every 15-20°C reduction in the boiler flue gas temperature can increase the boiler thermal efficiency by 1%, so reducing the boiler flue gas temperature has become an important way for boilers to save energy. [0004] At pre...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22D1/00F22D5/34
CPCF22D1/003F22D5/34
Inventor 张海郭军刘志云张朝晖任勇
Owner 山西中源科扬节能服务有限公司
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