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Method and device for recovering waste heat of ammonia-process desulfurization and decarbonization system

A waste heat recovery and ammonia desulfurization technology, applied in separation methods, chemical instruments and methods, and greenhouse gas reduction, etc., can solve the problems of strict storage conditions and no reuse function.

Pending Publication Date: 2022-08-09
JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the regenerator relies on optical fiber transmission, has strict requirements on storage conditions and does not have multiplexing functions

Method used

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  • Method and device for recovering waste heat of ammonia-process desulfurization and decarbonization system
  • Method and device for recovering waste heat of ammonia-process desulfurization and decarbonization system

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Embodiment

[0040] like figure 1 shown, process gas 1 (ie, coal-fired boiler flue gas, which contains CO 2 , SO 2 , O 2 , N 2 and dust particles) the temperature is 128℃, and the flue gas volume is 857662Nm 3 / h, after passing through the gas heat exchanger 2, it drops to 100 °C and then enters the desulfurization equipment 4. The intermediate medium 14 (ie, water) passes through the gas heat exchanger 2 and then rises from 72 °C to 96 °C, and then goes to the refrigerator 3 to freeze Water 15 was reduced from 17°C to 7°C.

[0041]The temperature of the gas after desulfurization is 45°C, and it enters the cooling device 5 and the decarburization device 7 in turn. The cooling device 5 and the decarburization device 7 are of tower structure and are separated by a liquid collector 6 . The liquid collector 6 is a tray gas cap structure, allowing the gas to enter the decarburization device 7 from the cooling device 5 through the gas cap. Both the cooling equipment 5 and the decarburizat...

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Abstract

The invention relates to a method for recovering waste heat of an ammonia desulfurization and decarburization system, which comprises the following steps of: removing heat of a decarburization system by utilizing heat of process gas before desulfurization, heating an intermediate medium by the process gas before desulfurization through a gas heat exchanger, and driving a refrigerating machine to refrigerate by the intermediate medium; and after obtaining the cooling capacity, the secondary refrigerant cools the decarburized process gas through the liquid-liquid heat exchanger. The waste heat in the process gas is fully utilized for cooling the decarburization process gas, so that the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method and a device for recycling waste heat of ammonia desulfurization and decarbonization. Background technique [0002] The direct discharge of low-temperature flue gas from industrial boilers and other low-temperature industrial gases is widely used in petroleum, chemical, and domestic heating fields. Although the low-temperature gas waste heat has a lower taste, its total amount is large and has good energy saving potential. And with the intensification of environmental pollution and energy shortage, the state vigorously advocates energy conservation and emission reduction. Under this background, enterprises pay more and more attention to how to use the waste heat of low-temperature gas generated in the production process. [0003] CN105240826A discloses a low-temperature flue gas waste heat recovery system, which includes: a heat collecting ...

Claims

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Application Information

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IPC IPC(8): B01D53/34B01D53/50B01D53/62B01D53/78
CPCB01D53/343B01D53/504B01D53/62B01D53/78B01D2257/504Y02P20/129C09K5/048F27D17/004
Inventor 罗静王金勇张军祁丽昉
Owner JIANGSU NEW CENTURY JIANGNAN ENVIRONMENTAL PROTECTION
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