Flue gas waste heat recovery device of waste incineration system
A flue gas waste heat and waste incineration technology, applied in incinerators, combustion methods, combustion types, etc., can solve the problems of corrosion of equipment and chimneys, waste of heat energy, low recovery rate of latent heat of steam liquefaction, etc. The effect of improving thermal efficiency
Pending Publication Date: 2021-12-03
杭州科晟能源技术有限公司
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Problems solved by technology
At present, the temperature of the flue gas after purification is generally between 130-160°C, and the water content in the flue gas is about 28%. That is to say, there is still a lot of "waste heat" in the flue gas at this time. Exhausting flue gas will cause waste of heat energy. At the same time, flue gas with high water content will form a large number of white plumes when discharged.
The waste heat in the flue gas after purification treatment mainly includes two parts: the sensible heat of the flue gas and the latent heat of water vapor liquefaction, and the existing waste heat recovery and utilization technology has a very low recovery rate for the latent heat of water vapor liquefaction
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[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0029] Such as figure 1 As shown, a waste incineration system flue gas waste heat recovery device includes a waste incineration treatment device and a flue gas waste heat recovery device, wherein the waste incineration treatment device includes a waste incinerator 1 for burning waste, and is used to convert the heat of the flue gas A waste heat boiler converted into steam for power generation 2, and a post-processing device for purifying flue gas. Of course, the present invention also includes a hot water pipe network 4 for providing hot water, a heat exchange device 5 including a heat supply end 51 and a heat absorption end 52, the heat absorption end of the heat exchange device is connected to the hot water pipe network, The heat supply end of the heat exchange device exchanges the waste heat generated by flue gas in the present invention wi...
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The invention discloses a flue gas waste heat recovery device of a waste incineration system. The device comprises a waste incineration treatment device, an absorption tower with an ejector and a solution generation tower with a spraying device, and the solution generation tower is communicated with the ejector of the absorption tower. Flue gas subjected to incineration treatment through the waste incineration treatment device enters the absorption tower and the solution generation tower, the ejector ejects a high-concentration liquid moisture absorbent to absorb water vapor in the flue gas to become a low-concentration solution, and the low-concentration solution conducts heat to a hot water pipe network through a heat exchange device. At the moment, the low-concentration solution is sprayed out downwards through the spraying device in the solution generation tower and makes contact with the flue gas in the solution generation tower for heat exchange, the low-concentration solution is heated to evaporate water to become a high-concentration liquid moisture absorbent, and the high-concentration liquid moisture absorbent enters the absorption tower again for moisture absorption. By adoption of the method, the waste heat in the flue gas can be fully recycled, the dew point temperature of the flue gas is reduced, the chimney is prevented from being corroded by flue gas condensation, and the heat efficiency of a garbage power plant can be improved.
Description
technical field [0001] The invention relates to the technical field of domestic waste incineration flue gas treatment and waste heat recovery, and specifically relates to a waste heat recovery device for flue gas in a waste incineration system. Background technique [0002] Garbage incineration treatment has attracted much attention due to its high degree of harmlessness, large capacity reduction, recyclable heat energy (power generation, heat supply), and timely treatment. Many cities have built waste incineration power plants to process domestic waste. In the prior art, people usually incinerate garbage in the waste incineration boiler to generate high-temperature flue gas, which is recycled in the waste heat boiler, and the flue gas with reduced temperature enters the flue gas purification system for purification treatment, and the treated flue gas The gas can be exhausted outside. At present, the temperature of the flue gas after purification is generally between 130-16...
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Patent Timeline
Login to View More IPC IPC(8): F23G5/46F22B1/18F23J15/00F23J15/06
CPCF23G5/46F22B1/18F23J15/003F23J15/06F23G2206/203Y02E20/30Y02E20/12
Inventor 凌佩武叶龙祥张维辉郝琦徐晓芳
Owner 杭州科晟能源技术有限公司