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Flue gas purification system and cooling capacity comprehensive utilization process thereof

A flue gas purification system and flue gas technology, used in gas treatment, chemical instruments and methods, lighting and heating equipment, etc. Take advantage of the full effect

Pending Publication Date: 2021-11-23
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that only COAP technology is used to process the flue gas and then directly evacuate the flue gas and cannot meet the needs of flue gas evacuation, thereby providing a kind of flue gas that solves the above problems. Air Purification System and Its Cooling Capacity Comprehensive Utilization Process

Method used

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  • Flue gas purification system and cooling capacity comprehensive utilization process thereof
  • Flue gas purification system and cooling capacity comprehensive utilization process thereof

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Embodiment 1

[0052] A flue gas purification system includes a COAP system 1 and a carbon capture system 2 whose air inlet communicates with the exhaust port of the COAP system 1 . Among them, the COAP system 1 is used to desulfurize and denitrify the flue gas and then discharge it, and the carbon capture system 2 is used to remove carbon in the flue gas discharged from the COAP system 1 .

[0053] The present invention uses the COAP system and the carbon capture system in combination, not only can use the COAP process to remove SOx, NOx, Hg, HCl, HF, VOCs, etc. in the flue gas of the power plant; at the same time, combined with the carbon capture system, it can also The carbon in the flue gas can be removed, and the flue gas treated by the COAP system and the carbon capture system can achieve the goal of environmental protection and double carbon, and meet the needs of flue gas emptying.

[0054] The COAP system 1 in this embodiment may be a conventional COAP system, or a COAP system with ...

Embodiment 2

[0056] In this embodiment, the structure of a flue gas purification system is further optimized on the basis of Embodiment 1. In this embodiment, the carbon capture system 2 is a CO2 chemical absorption system, and a cooling capacity utilization pipeline system 3 is added at the same time. Effectively and rationally apply the cooling capacity in the low-temperature flue gas discharged from the COAP system 1, such as figure 2 As shown, the details are as follows:

[0057] The carbon capture system 2 includes an absorption tower 21 , a regeneration tower 22 , a rich liquid pipe 23 , a rich liquid pump 24 , a lean liquid pipe 25 , a lean liquid pump 26 , a reboiler 27 and a condenser 28 . Wherein, the absorption tower 21 has an air inlet, a gas outlet, a liquid inlet and a liquid outlet, and the regeneration tower 22 has a liquid inlet, a liquid outlet and an exhaust port; the bottom of the regeneration tower 22 is provided with a reboiler 27, and the top exhaust A condenser 28...

Embodiment 3

[0064] This embodiment further optimizes the structure of a flue gas purification system on the basis of embodiment 2. In this embodiment, a steam heat utilization pipeline system 4 is added, which can utilize steam of different qualities in the power plant step by step , to improve energy utilization, as follows:

[0065] The steam heat utilization pipeline system 4 includes a high-temperature steam delivery pipe 41 , a regeneration gas discharge pipe 42 , a steam recovery pipe 43 and a third heat exchanger 44 . Among them, the high-temperature steam delivery pipe 41 communicates with the regeneration gas inlet of the desulfurization adsorption tower 12 and / or the denitrification adsorption tower 14; the high-temperature steam discharged from the steam turbine of the power plant up to 300-350 ° C is used as the regeneration gas, and the regeneration gas is used as the regeneration gas The temperature of the regeneration gas after the desulfurization adsorption tower 12 and / or...

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Abstract

The invention discloses a flue gas purification system and a cooling capacity comprehensive utilization process thereof. The flue gas purification system comprises a COAP system and a carbon capture system; the COAP system is used for conducting desulfurization and denitration on flue gas and then discharging the flue gas; a gas inlet of the carbon capture system is communicated with a gas outlet of the COAP system, and the carbon capture system is used for removing carbon in flue gas exhausted by the COAP system. The flue gas purification system further comprises a cooling capacity utilization pipeline system which is used for sequentially conveying flue gas discharged by the COAP system to a regeneration tower top condenser and a barren liquor pipe of the carbon capture system to be subjected to heat exchange with discharged carbon dioxide and barren liquor respectively, and then the flue gas enters an absorption tower to be subjected to decarburization treatment. The flue gas treated by the COAP system and the carbon capture system in a combined manner can achieve the purposes of environmental protection and double carbon, the requirement of flue gas emptying is met, and the cooling capacity of the flue gas discharged by the COAP system can be utilized more sufficiently.

Description

technical field [0001] The invention relates to the technical field of power plant energy recovery, in particular to a flue gas purification system and a comprehensive utilization process of cooling capacity thereof. Background technique [0002] Low-temperature integrated pollutant removal technology (abbreviation: COAP technology) is a comprehensive treatment technology for flue gas pollutants. This technology is based on the principle of low-temperature adsorption and denitrification of flue gas. 2 and residual moisture, while also adsorbing SO 3 , Hg, HCl, HF, VOCs and a small amount of NOx; the flue gas after desulfurization and dehumidification is cooled to the sub-zero temperature zone, and then enters the low-temperature denitrification adsorption tower, and NOx is deeply adsorbed and removed at low temperature, achieving pollutant-oriented'integrated removal In addition to 'and' near-zero emissions' two major goals. For example: Chinese patent CN110743312A disclos...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/02F28D21/00
CPCB01D53/18B01D53/1437B01D53/1475B01D53/1425B01D53/02F28D21/001B01D2258/0283B01D2259/4009B01D2257/302B01D2257/40B01D2257/602B01D2257/2045B01D2257/2047B01D2257/708Y02C20/40
Inventor 刘练波王焕君郭东方刘蓉范金航牛红伟郜时旺
Owner HUANENG CLEAN ENERGY RES INST
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