Flue gas residual heat recovery system with absorption type heat pump circulation

An absorption heat pump, flue gas waste heat technology, applied in heat recovery systems, preheating, feed water heaters, etc. Effect

Inactive Publication Date: 2015-02-18
XINJIANG INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of the solution to absorb the waste heat of the flue gas by installing the tail flue gas air preheater on the flue of the gas boiler can only use the heat transfer method of temperature difference as the driving force to utilize t

Method used

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  • Flue gas residual heat recovery system with absorption type heat pump circulation

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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, a flue gas waste heat recovery system of an absorption heat pump cycle includes a gas boiler 1, an air preheater 2 and an absorption heat pump device 3, and the absorption heat pump device 3 includes an evaporator 3-1 and a condenser 3 -2, throttling mechanism 3-3, absorber 3-4, solution pump 3-5, generator 3-6 and throttle valve 3-7, the absorber 3-4, solution pump 3-5, generator The generator 3-6 and the throttle valve 3-7 are sequentially connected to form a circuit, and the generator 3-6 is sequentially connected to the condenser 3-2, the throttling mechanism 3-3, the evaporator 3-1, and finally connected to the absorber 3-4; the evaporator 3-1 is provided with a discharge pipe 3-8 for discharging flue gas and condensed water, and the condenser 3-2 is provided with a boiler low-temperature water supply channel 3-9 and a ...

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Abstract

The invention discloses a flue gas residual heat recovery system with absorption type heat pump circulation. The system comprises a gas boiler, an air preheater and an absorption type heat pump device, wherein the absorption type heat pump device comprises an evaporator, a condenser, a throttle mechanism, an absorber, a solution pump, a generator and a throttle valve, the absorber, the solution pump, the generator and the throttle valve are connected sequentially, so as to form a loop, and the generator is sequentially connected with the condenser, the throttle mechanism and the evaporator and is finally connected to the absorber; the evaporator is provided with discharging pipes which are used for discharging flue gas and condensation water, the condenser is provided with a boiler low-temperature water supplying passage and a boiler high-temperature water supplying passage, and the boiler high-temperature water supplying passage is connected to the gas boiler; the gas boiler is provided with a high-temperature flue gas passage and a steam branch passage. Compared with the prior art, the system has the advantages that the temperature of supplied water is increased by 5-8 DEG C, and the heat absorption capacity of the supplied water in the boiler is lowered, so that the volume of combusted gas is reduced, and the aims of energy saving and emission reduction are achieved.

Description

technical field [0001] The invention relates to a heat recovery device, in particular to a flue gas waste heat recovery system of an absorption heat pump cycle. Background technique [0002] In order to change the air pollution caused by coal-fired heating in Urumqi in winter, since 2010, Urumqi has launched a "coal-to-gas" project. The implementation of the "coal-to-gas" project has resulted in the blue sky and white clouds in Urumqi. At present, the heating ratio of clean energy in Tianshan District, Shayibake District, High-tech Zone (New District), Shuimogou District, and Midong District in the main urban area of ​​Urumqi has reached 100%, completely realizing natural gas heating, becoming the first in the country A city heated by natural gas. As of the heating period in 2014, a total of more than 700 gas-fired boilers with a hot water capacity of 100,000 to 1 million tons have been installed. These gas-fired boilers absorb the waste heat of the flue gas by installing ...

Claims

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Application Information

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IPC IPC(8): F22D1/36
CPCY02B30/52
Inventor 代元军李保华任常在陈晓云石黄霞李资姚金龙张磊
Owner XINJIANG INST OF ENG
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