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Method for improving quality of recyclable exhaust waste heat in power plant boiler and progressively utilizing exhaust waste heat

A technology for thermal power plants and boilers, which is applied in the field of step-by-step utilization and can solve the problems of boiler efficiency and low quality.

Active Publication Date: 2012-04-04
CHENGXIN GREEN INTEGRATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the temperatures at both ends of the general heat exchanger 2 are 115°C and 90°C respectively, and the temperature difference is 25°C. Similarly, the quality of the waste heat of the flue gas is not high, and the heat exchanger 2 can only be used for heating and desulfurization after the temperature is low. The flue gas does not affect the improvement of boiler efficiency

Method used

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  • Method for improving quality of recyclable exhaust waste heat in power plant boiler and progressively utilizing exhaust waste heat
  • Method for improving quality of recyclable exhaust waste heat in power plant boiler and progressively utilizing exhaust waste heat
  • Method for improving quality of recyclable exhaust waste heat in power plant boiler and progressively utilizing exhaust waste heat

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Embodiment Construction

[0024] Such as image 3 As shown, the method of the present invention to improve the quality of recyclable exhaust smoke waste heat of boilers in thermal power plants and to utilize them step by step connects a heat source 9 in series at the front end of the air preheater 10 where the air of the boiler 1 is input into the cold air duct to heat the air entering the air preheater 10 , the first heat exchanger 21 is connected in series in the exhaust flue 3 of the boiler 1, the first heat exchanger 21 is arranged after the air preheater 10 of the exhaust flue 3 of the boiler and before the desulfurization tower 6 and is used for heating the boiler return Boiler feed water for thermal system 4.

[0025] The above-mentioned heat source 9 can be an air heater, and the second heat exchanger 23 is arranged before the desulfurization tower 6 of the boiler exhaust flue 3 and after the first heat exchanger 21, and the heat of the second heat exchanger 23 provides the air heater for The ...

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Abstract

The invention discloses a method for improving the quality of recyclable exhaust waste heat in a power plant boiler and progressively utilizing the exhaust waste heat. A heat source for heating air entering an air pre-heater is connected in series to the front end of the air pre-heater of a boiler air input cold air duct, a first heat exchanger is connected in series to a boiler exhaust flue, andthe first heat exchanger is arranged in back of the air pre-heater of the boiler exhaust flue and in front of a desulfurizing tower and used for heating boiler water of a boiler heat recovery system.By using the method, the quality of the recyclable exhaust waste heat can be effectively improved, so that the recycling efficiency of the boiler exhaust waste heat is higher, the efficiency of the boiler and a steam turbine is improved, and the energy consumption for power generation is reduced.

Description

technical field [0001] The invention relates to a method for improving the quality of recyclable smoke waste heat of a boiler in a thermal power plant and utilizing it step by step. Background technique [0002] Coal-fired boilers in thermal power plants provide power generation energy for generating units, and at the same time a large amount of heat energy is discharged from the chimney along with boiler flue gas; in the context of vigorously advocating energy conservation and emission reduction today, how to reduce the heat loss of exhaust gas for coal-fired boilers in thermal power plants, Therefore, saving energy and protecting the environment are of great significance. [0003] The exhaust smoke loss in the operation of the thermal power plant boiler is the most important heat loss. If the exhaust heat of the boiler can be recovered to the maximum extent and utilized in the generator set, the boiler efficiency, economic benefits and social benefits can be improved. ben...

Claims

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Application Information

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IPC IPC(8): F22D1/00F23L15/00F23J15/08
CPCY02E20/34
Inventor 袁一军王金旺
Owner CHENGXIN GREEN INTEGRATION
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