CN210385368U - Carbon dioxide capture system based on power supply of coal-fired steam injection boiler system - Google Patents
Carbon dioxide capture system based on power supply of coal-fired steam injection boiler system Download PDFInfo
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Abstract
本实用新型提供了一种基于燃煤注汽锅炉系统供电的二氧化碳捕集系统,其包括吸收塔、富液泵、贫富液换热器、解吸塔、贫液泵、贫液冷却器、燃煤注汽锅炉系统、汽轮发电机、煮沸器。其中,除盐水吸热升温,然后经由贫液冷却器第一出口进入燃煤注汽锅炉系统中;除盐水在燃煤注汽锅炉系统中变为高温高压蒸汽,一部分高温高压蒸汽通入汽轮发电机中,在汽轮发电机中高温高压蒸汽转变为电能和低温低压蒸汽,汽轮发电机电连接富液泵和贫液泵,以对富液泵和贫液泵提供电能;低温低压蒸汽进入煮沸器中与解吸塔底的部分液体进行第三热交换。汽轮发电机产生的电能可用于富液泵和贫液泵的供电,从而节省了富液泵和贫液泵额外消耗的电能,降低了捕集成本。
The utility model provides a carbon dioxide capture system powered by a coal-fired steam injection boiler system, which comprises an absorption tower, a rich liquid pump, a lean and rich liquid heat exchanger, a desorption tower, a lean liquid pump, a lean liquid cooler, a Coal steam injection boiler system, turbine generator, boiler. Among them, the demineralized water absorbs heat and heats up, and then enters the coal-fired steam injection boiler system through the first outlet of the lean liquid cooler; the demineralized water turns into high-temperature and high-pressure steam in the coal-fired steam-injection boiler system, and part of the high-temperature and high-pressure steam is passed into the steam turbine In the generator, the high-temperature and high-pressure steam is converted into electric energy and low-temperature and low-pressure steam in the turbo-generator, and the turbo-generator is electrically connected to the rich liquid pump and the lean liquid pump to provide electrical energy to the rich liquid pump and the lean liquid pump; the low temperature and low pressure steam enters A third heat exchange occurs in the boiler with a portion of the liquid at the bottom of the desorption column. The electric energy generated by the turbo-generator can be used for power supply of the rich liquid pump and the lean liquid pump, thereby saving the extra electric energy consumed by the rich liquid pump and the lean liquid pump, and reducing the capture cost.
Description
技术领域technical field
本实用新型涉及二氧化碳捕集领域,尤其涉及一种基于燃煤注汽锅炉系统供电的二氧化碳捕集系统。The utility model relates to the field of carbon dioxide capture, in particular to a carbon dioxide capture system powered by a coal-fired steam injection boiler system.
背景技术Background technique
由于化石燃料的大量燃烧,大气中CO2的含量也不断上升,大量CO2的排放导致温室效应越来越严重,给全球的生态平衡和人类社会的发展带来了不可忽视的负面影响。Due to the massive combustion of fossil fuels, the content of CO 2 in the atmosphere is also rising, and the emission of a large amount of CO 2 has led to an increasingly serious greenhouse effect, which has brought negative impacts to the global ecological balance and the development of human society that cannot be ignored.
CO2减排主要有三种方式,第一种是提高能效,提高设备和工艺的能效可以有效的减少CO2的排放。第二种是寻找替代能源,新能源的发现和清洁能源的利用可以减少化石能源的使用从而有效的减小CO2的排放。第三种是对CO2进行捕集和封存(CCS)。前两种方式很难在短时间内有突破性的发展,而对排出的CO2进行捕集和封存已经成为减小大气中CO2排放的最直接最有效的方式。There are three main ways to reduce CO 2 emissions. The first is to improve energy efficiency. Improving the energy efficiency of equipment and processes can effectively reduce CO 2 emissions. The second is to look for alternative energy sources. The discovery of new energy sources and the utilization of clean energy can reduce the use of fossil energy and thus effectively reduce CO 2 emissions. The third is CO capture and storage (CCS). It is difficult for the first two methods to achieve breakthrough development in a short period of time, and the capture and storage of exhausted CO 2 has become the most direct and effective way to reduce CO 2 emissions in the atmosphere.
目前利用有机胺捕集CO2技术是目前最成熟的技术,有机胺法捕集CO2技术的主要不足之处是解吸塔再生能耗过高,为了更有效地减少CO2排放,开发新的CO2捕集系统,国内外学者正不断对现有流程进行优化与开发。At present, the use of organic amines to capture CO2 technology is the most mature technology at present. The main disadvantage of the organic amine method to capture CO2 technology is that the energy consumption of desorption tower regeneration is too high. In order to reduce CO2 emissions more effectively, new For CO 2 capture systems, domestic and foreign scholars are constantly optimizing and developing existing processes.
然而燃煤注汽锅炉是烟气CO2捕集技术的“蓝海”,目前尚未有示范工程建设,也未有具体的技术成果发布。However, coal-fired steam injection boilers are the "blue ocean" of flue gas CO 2 capture technology. At present, there is no demonstration project construction, and no specific technical achievements have been released.
实用新型内容Utility model content
鉴于背景技术中存在的问题,本实用新型的目的在于提供一种基于燃煤注汽锅炉系统供电的二氧化碳捕集系统,其将蒸汽发电技术用于二氧化碳以及吸收剂的再生,同时有效利用解吸塔中二氧化碳和吸收剂再生产生的废热来加热注入燃煤注汽锅炉系统内的补给水,从而能够降低二氧化碳捕集成本和锅炉煤耗。In view of the problems existing in the background technology, the purpose of the present utility model is to provide a carbon dioxide capture system powered by a coal-fired steam injection boiler system, which uses the steam power generation technology for the regeneration of carbon dioxide and absorbent, while effectively utilizing the desorption tower. The waste heat generated by the regeneration of carbon dioxide and the absorbent is used to heat the make-up water injected into the coal-fired steam injection boiler system, thereby reducing the cost of carbon dioxide capture and boiler coal consumption.
为了实现上述目的,本实用新型提供了一种基于燃煤注汽锅炉系统供电的二氧化碳捕集系统,其包括吸收塔、富液泵、贫富液换热器、解吸塔、贫液泵、贫液冷却器、燃煤注汽锅炉系统、汽轮发电机、煮沸器。In order to achieve the above purpose, the present invention provides a carbon dioxide capture system powered by a coal-fired steam injection boiler system, which includes an absorption tower, a rich liquid pump, a lean and rich liquid heat exchanger, a desorption tower, a lean liquid pump, a lean liquid pump, and a lean liquid pump. Liquid coolers, coal-fired steam injection boiler systems, turbine generators, boilers.
吸收塔包括:吸收塔第一入口,位于吸收塔的下部,供烟气进入;吸收塔第二入口,位于吸收塔的上部;吸收塔第一出口,位于吸收塔的底部;吸收塔第二出口,位于吸收塔的顶部。The absorption tower includes: the first inlet of the absorption tower, located at the lower part of the absorption tower, for the entry of flue gas; the second inlet of the absorption tower, located at the upper part of the absorption tower; the first outlet of the absorption tower, located at the bottom of the absorption tower; the second outlet of the absorption tower , located at the top of the absorption tower.
贫富液换热器包括:贫富液换热器第一入口;贫富液换热器第二入口;贫富液换热器第一出口;贫富液换热器第二出口。The lean-rich liquid heat exchanger includes: a first inlet of the lean-rich liquid heat exchanger; a second inlet of the lean-rich liquid heat exchanger; a first outlet of the lean-rich liquid heat exchanger; and a second outlet of the lean-rich liquid heat exchanger.
富液泵的一侧连通于吸收塔第一出口,另一侧连通于贫富液换热器第一入口。One side of the rich liquid pump is connected to the first outlet of the absorption tower, and the other side is connected to the first inlet of the lean-rich liquid heat exchanger.
解吸塔包括:解吸塔第一入口,位于解吸塔的上部,连通贫富液换热器第一出口;解吸塔第二入口,位于解吸塔的底部;解吸塔第一出口,位于解吸塔的底部;解吸塔第二出口,位于解吸塔的顶部;解吸塔第三出口,位于解吸塔的下部。The desorption tower includes: the first inlet of the desorption tower, located at the upper part of the desorption tower, connected to the first outlet of the lean-rich liquid heat exchanger; the second inlet of the desorption tower, located at the bottom of the desorption tower; the first outlet of the desorption tower, located at the bottom of the desorption tower ; The second outlet of the desorption tower is located at the top of the desorption tower; the third outlet of the desorption tower is located at the lower part of the desorption tower.
贫液泵的一侧连通于解吸塔第一出口,另一侧连通于贫富液换热器第二入口。One side of the lean liquid pump is connected to the first outlet of the desorption tower, and the other side is connected to the second inlet of the lean and rich liquid heat exchanger.
贫液冷却器包括:贫液冷却器第一入口,连通贫富液换热器第二出口;贫液冷却器第二入口,供外部除盐水进入;贫液冷却器第一出口,连通于燃煤注汽锅炉系统;贫液冷却器第二出口,连通于吸收塔第二入口。The lean liquid cooler includes: the first inlet of the lean liquid cooler, which is connected to the second outlet of the lean and rich liquid heat exchanger; the second inlet of the lean liquid cooler is for the entry of external demineralized water; the first outlet of the lean liquid cooler is connected to the fuel Coal steam injection boiler system; the second outlet of the lean liquid cooler is connected to the second inlet of the absorption tower.
汽轮发电机包括:汽轮发电机蒸汽入口,连通于燃煤注汽锅炉系统;汽轮发电机蒸汽出口;汽轮发电机发电接口,分别电连接于富液泵、贫液泵。The steam turbine generator comprises: the steam inlet of the steam turbine generator, which is connected to the coal-fired steam injection boiler system; the steam outlet of the steam turbine generator;
煮沸器包括:煮沸器第一入口,连通于汽轮发电机蒸汽出口;煮沸器第二入口,连通于解吸塔第三出口;煮沸器第一出口,连通于燃煤注汽锅炉系统;煮沸器第二出口,连通于解吸塔第二入口。The boiler includes: the first inlet of the boiler, which is connected to the steam outlet of the steam turbine generator; the second inlet of the boiler, which is connected to the third outlet of the desorption tower; the first outlet of the boiler, which is connected to the coal-fired steam injection boiler system; the boiler The second outlet is connected to the second inlet of the desorption tower.
其中,烟气经由吸收塔第一入口进入吸收塔中且从下往上运动,吸收剂经由吸收塔第二入口进入吸收塔中且往下喷淋,往下喷淋的吸收剂与烟气逆流接触,从而吸收剂吸收烟气中的二氧化碳而变为富液,富液向下沉降,脱除了二氧化碳的烟气继续向上运动并经由吸收塔第二出口排出;富液经由富液泵从吸收塔第一出口、贫富液换热器第一入口泵入到贫富液换热器中进行第一热交换,富液吸热升温;The flue gas enters the absorption tower through the first inlet of the absorption tower and moves from bottom to top, the absorbent enters the absorption tower through the second inlet of the absorption tower and is sprayed downward, and the absorbent sprayed downward is countercurrent to the flue gas contact, so that the absorbent absorbs carbon dioxide in the flue gas and becomes rich liquid, the rich liquid settles down, and the flue gas from which carbon dioxide has been removed continues to move upward and is discharged through the second outlet of the absorption tower; the rich liquid passes through the rich liquid pump from the absorption tower. The first outlet and the first inlet of the lean-rich liquid heat exchanger are pumped into the lean-rich liquid heat exchanger for the first heat exchange, and the rich liquid absorbs heat to heat up;
完成第一热交换的富液经由贫富液换热器第一出口、解吸塔第一入口进入解吸塔中,富液在解吸塔中被加热解吸并分解为贫液和二氧化碳,贫液在解吸塔中向下沉降,二氧化碳向上运动并经由解吸塔第二出口排出;The rich liquid that has completed the first heat exchange enters the desorption tower through the first outlet of the lean-rich liquid heat exchanger and the first inlet of the desorption tower. The rich liquid is heated and desorbed in the desorption tower and decomposed into lean liquid and carbon dioxide. The tower settles downward, and the carbon dioxide moves upward and is discharged through the second outlet of the desorption tower;
解吸塔中解吸出的贫液经由贫液泵从解吸塔第一出口、贫富液换热器第二入口泵入到贫富液换热器中,与经由贫富液换热器第一入口进入的富液进行前述的第一热交换,贫液放热降温;The lean liquid desorbed from the desorption tower is pumped into the lean and rich liquid heat exchanger from the first outlet of the desorption tower and the second inlet of the lean and rich liquid heat exchanger through the lean liquid pump, and is pumped into the lean and rich liquid heat exchanger through the lean liquid pump, and is passed through the first inlet of the lean and rich liquid heat exchanger. The incoming rich liquid is subjected to the aforementioned first heat exchange, and the lean liquid is exothermic and cooled;
完成第一热交换的贫液经由贫富液换热器第二出口、贫液冷却器第一入口进入贫液冷却器中,与经由贫液冷却器第二入口进入的除盐水进行第二热交换,贫液再次放热降温,降温后的贫液经由贫液冷却器第二出口、吸收塔第二入口进入吸收塔中作为前述吸收剂使用;The lean liquid that has completed the first heat exchange enters the lean liquid cooler through the second outlet of the lean-rich liquid heat exchanger and the first inlet of the lean liquid cooler, and conducts second heat with the demineralized water entering through the second inlet of the lean liquid cooler. Exchange, the lean liquid is exothermic and cooled again, and the cooled lean liquid enters the absorption tower through the second outlet of the lean liquid cooler and the second inlet of the absorption tower to be used as the aforementioned absorbent;
经由贫液冷却器第二入口进入的除盐水吸热升温,吸热升温后的除盐水经由贫液冷却器第一出口进入燃煤注汽锅炉系统中,以作为燃煤注汽锅炉系统的补给水使用;The demineralized water entering through the second inlet of the lean liquid cooler absorbs heat and heats up, and the demineralized water after the endothermic temperature rises enters the coal-fired steam injection boiler system through the first outlet of the lean liquid cooler, as a supply to the coal-fired steam injection boiler system water use;
补给水在燃煤注汽锅炉系统的作用下变为高温高压蒸汽,一部分高温高压蒸汽通入汽轮发电机中,在汽轮发电机中高温高压蒸汽转变为电能和低温低压蒸汽,汽轮发电机的汽轮发电机发电接口电连接富液泵和贫液泵,以对富液泵和贫液泵提供电能;The make-up water becomes high-temperature and high-pressure steam under the action of the coal-fired steam injection boiler system, and a part of the high-temperature and high-pressure steam is passed into the turbine generator, where the high-temperature and high-pressure steam is converted into electric energy and low-temperature and low-pressure steam, and the turbine generates electricity. The steam turbine generator power generation interface of the engine is electrically connected to the rich liquid pump and the lean liquid pump to provide electrical energy to the rich liquid pump and the lean liquid pump;
低温低压蒸汽经由汽轮发电机蒸汽出口、煮沸器第一入口进入煮沸器中进行第三热交换;The low-temperature and low-pressure steam enters the boiler through the steam outlet of the steam turbine generator and the first inlet of the boiler for the third heat exchange;
解吸塔底的部分液体经由解吸塔第三出口、煮沸器第二入口进入煮沸器中,与经由煮沸器第一入口进入煮沸器的低温低压蒸汽进行前述第三热交换,所述部分液体在煮沸器中吸热升温而被部分汽化并由煮沸器第二出口、解吸塔第二入口进入解吸塔中,以为解吸塔中的富液解吸提供蒸汽和热量;煮沸器中低温低压蒸汽放热降温而变为凝结水,凝结水经由煮沸器第一出口进入到燃煤注汽锅炉系统中,以作为燃煤注汽锅炉系统的补给水使用。Part of the liquid at the bottom of the desorption tower enters the boiler through the third outlet of the desorption tower and the second inlet of the boiler, and performs the third heat exchange with the low-temperature and low-pressure steam entering the boiler through the first inlet of the boiler, and the part of the liquid is boiled. The boiler absorbs heat and heats up and is partially vaporized and enters into the desorption tower from the second outlet of the boiler and the second inlet of the desorption tower to provide steam and heat for the desorption of the rich liquid in the desorption tower; It becomes condensed water, and the condensed water enters the coal-fired steam injection boiler system through the first outlet of the boiler to be used as the make-up water of the coal-fired steam injection boiler system.
在一实施例中,燃煤注汽锅炉系统包括锅炉除氧器、锅炉汽包和注汽锅炉本体。In one embodiment, a coal-fired steam injection boiler system includes a boiler deaerator, a boiler drum and a steam injection boiler body.
锅炉除氧器包括:锅炉除氧器第一入口,连通贫液冷却器第一出口;锅炉除氧器出口。The boiler deaerator includes: the first inlet of the boiler deaerator, which is connected to the first outlet of the lean liquid cooler; and the outlet of the boiler deaerator.
锅炉汽包包括:锅炉汽包第一入口,连通锅炉除氧器出口;锅炉汽包出口。The boiler steam drum includes: the first inlet of the boiler steam drum, which is connected to the outlet of the boiler deaerator; and the outlet of the boiler steam drum.
注汽锅炉本体包括:注汽锅炉本体入口,连通锅炉汽包出口;注汽锅炉本体第一出口,连通汽轮发电机蒸汽入口;注汽锅炉本体第二出口。The steam injection boiler body includes: an inlet of the steam injection boiler body, which is connected to the boiler steam drum outlet; a first outlet of the steam injection boiler body, which is connected to the steam inlet of the steam turbine generator; and a second outlet of the steam injection boiler body.
其中,经由贫液冷却器第二入口进入的除盐水进行前述第二热交换后吸热升温,吸热升温的除盐水经由贫液冷却器第一出口、锅炉除氧器第一入口进入锅炉除氧器中进行除氧处理,脱氧的除盐水经由锅炉除氧器出口、锅炉汽包第一入口进入锅炉汽包中被汽化而变为蒸汽;蒸汽经由锅炉汽包出口、注汽锅炉本体入口进入注汽锅炉本体中,蒸汽在注汽锅炉本体中被加热而成为高温高压蒸汽,前述的一部分高温高压蒸汽经由注汽锅炉本体第一出口、汽轮发电机蒸汽入口进入汽轮发电机中,以向汽轮发电机提供蒸汽;另一部分高温高压蒸汽经由注汽锅炉本体第二出口流向外界。Wherein, the demineralized water entering through the second inlet of the lean liquid cooler undergoes the aforementioned second heat exchange and then endothermic temperature rises, and the demineralized water that has endothermic temperature rise enters the boiler deaerator through the first outlet of the lean liquid cooler and the first inlet of the boiler deaerator. The deoxygenation treatment is carried out in the deaerator, and the deoxidized demineralized water enters the boiler steam drum through the outlet of the boiler deaerator and the first inlet of the boiler steam drum and is vaporized into steam; the steam enters through the outlet of the boiler steam drum and the inlet of the steam injection boiler body. In the steam injection boiler body, the steam is heated in the steam injection boiler body to become high-temperature and high-pressure steam. Provide steam to the steam turbine generator; another part of the high temperature and high pressure steam flows to the outside through the second outlet of the steam injection boiler body.
在一实施例中,锅炉除氧器还包括:锅炉除氧器第二入口。In one embodiment, the boiler deaerator further comprises: a second inlet of the boiler deaerator.
基于燃煤注汽锅炉系统供电的二氧化碳捕集系统还包括再生气冷却器、压缩机、压缩气冷却器。The carbon dioxide capture system based on the power supply of the coal-fired steam injection boiler system also includes a regeneration gas cooler, a compressor, and a compressed gas cooler.
再生气冷却器包括:再生气冷却器第一入口,连通解吸塔第二出口;再生气冷却器第二入口,供外部除盐水进入;再生气冷却器第一出口,连通锅炉除氧器第二入口;再生气冷却器第二出口。The regeneration gas cooler includes: the first inlet of the regeneration gas cooler, which is connected to the second outlet of the desorption tower; the second inlet of the regeneration gas cooler, for the entry of external demineralized water; the first outlet of the regeneration gas cooler, which is connected to the second outlet of the boiler deaerator Inlet; second outlet of regeneration gas cooler.
压缩机包括:压缩机入口,连通再生气冷却器第二出口;压缩机出口。The compressor includes: an inlet of the compressor, which is communicated with the second outlet of the regenerating gas cooler; and an outlet of the compressor.
压缩气冷却器包括:压缩气冷却器第一入口,连通压缩机出口;压缩气冷却器第二入口,供外部除盐水进入;压缩气冷却器第一出口;压缩气冷却器第二出口,连通锅炉除氧器第二入口。The compressed gas cooler includes: a first inlet of the compressed gas cooler, which is connected to the compressor outlet; a second inlet of the compressed gas cooler, which is used for external demineralized water to enter; a first outlet of the compressed gas cooler; and a second outlet of the compressed gas cooler, which is communicated with The second inlet of the boiler deaerator.
其中,经由解吸塔第二出口排出的二氧化碳经由再生气冷却器第一入口进入再生气冷却器中,与经由再生气冷却器第二入口进入的除盐水进行第四热交换,Wherein, the carbon dioxide discharged through the second outlet of the desorption tower enters the regeneration gas cooler through the first inlet of the regeneration gas cooler, and performs a fourth heat exchange with the demineralized water entering through the second inlet of the regeneration gas cooler,
二氧化碳放热降温然后经由再生气冷却器第二出口、压缩机入口进入压缩机中,二氧化碳被压缩机压缩增压,增压后的二氧化碳经由压缩机出口、压缩气冷却器第一入口进入压缩气冷却器中进行第五热交换,二氧化碳再次放热降温,然后经由压缩气冷却器第一出口排出;The carbon dioxide releases heat and cools down, and then enters the compressor through the second outlet of the regenerating gas cooler and the compressor inlet. The carbon dioxide is compressed and pressurized by the compressor, and the pressurized carbon dioxide enters the compressed gas through the compressor outlet and the first inlet of the compressed air cooler. The fifth heat exchange is carried out in the cooler, and the carbon dioxide exotherms and cools down again, and is then discharged through the first outlet of the compressed air cooler;
经由再生气冷却器第二入口进入的除盐水与经由再生气冷却器第一入口进入的二氧化碳进行前述第四热交换,除盐水吸热升温然后经由再生气冷却器第一出口、锅炉除氧器第二入口进入锅炉除氧器中进行除氧,脱氧后的除盐水经由锅炉除氧器出口、锅炉汽包入口进入锅炉汽包中,以作为补给水使用;The demineralized water entering through the second inlet of the regenerating gas cooler and the carbon dioxide entering through the first inlet of the regenerating gas cooler perform the aforementioned fourth heat exchange, the demineralized water absorbs heat and raises the temperature and then passes through the first outlet of the regenerating gas cooler and the boiler deaerator The second inlet enters the boiler deaerator for deoxidation, and the deoxidized demineralized water enters the boiler steam drum through the outlet of the boiler deaerator and the inlet of the boiler drum to be used as make-up water;
经由压缩气冷却器第二入口进入的除盐水与经由压缩气冷却器第一入口进入的二氧化碳进行前述第五热交换,除盐水吸热升温然后经由压缩气冷却器第二出口、锅炉除氧器第二入口进入锅炉除氧器中进行除氧,脱氧后的除盐水经由锅炉除氧器出口、锅炉汽包入口进入锅炉汽包中,以作为补给水使用。The demineralized water entering through the second inlet of the compressed gas cooler and the carbon dioxide entering through the first inlet of the compressed gas cooler perform the aforementioned fifth heat exchange, the demineralized water absorbs heat and warms up and then passes through the second outlet of the compressed gas cooler, the boiler deaerator The second inlet enters the boiler deaerator for deoxidation, and the deoxidized demineralized water enters the boiler steam drum through the outlet of the boiler deaerator and the inlet of the boiler drum to be used as make-up water.
在一实施例中,汽轮发电机的汽轮发电机发电接口还电连接于压缩机,以向压缩机供电。In one embodiment, the turbo-generator power generation interface of the turbo-generator is also electrically connected to the compressor to supply power to the compressor.
在一实施例中,锅炉汽包还包括锅炉汽包第二入口,锅炉汽包第二入口与煮沸器第一出口连通;其中,经由煮沸器第一出口排出的凝结水通过锅炉汽包第二入口进入锅炉汽包中,以作为锅炉汽包的补给水使用。In one embodiment, the boiler steam drum further comprises a second inlet of the boiler steam drum, and the second inlet of the boiler steam drum communicates with the first outlet of the boiler; wherein, the condensed water discharged through the first outlet of the boiler passes through the second inlet of the boiler steam drum. The inlet enters the boiler steam drum to be used as the make-up water for the boiler steam drum.
在一实施例中,燃煤锅炉的二氧化碳捕集系统还包括引风机。引风机包括:引风机入口,供外部烟气进入;引风机出口,连通吸收塔第一入口;其中,外部的烟气经由引风机入口进入到引风机中,然后经由引风机出口、吸收塔第一入口进入到吸收塔中。In one embodiment, the carbon dioxide capture system of the coal-fired boiler further includes an induced draft fan. The induced draft fan includes: the induced draft fan inlet, which is used for the entry of external flue gas; the induced draft fan outlet, which is connected to the first inlet of the absorption tower; wherein, the external flue gas enters the induced draft fan through the induced draft fan inlet, and then passes through the induced draft fan outlet and the absorption tower. An inlet goes into the absorption tower.
在一实施例中,汽轮发电机的汽轮发电机发电接口还电连接于引风机,以向引风机供电。In one embodiment, the turbo-generator power generation interface of the turbo-generator is also electrically connected to the induced draft fan to supply power to the induced draft fan.
在一实施例中,引风机入口连通于燃煤注汽锅炉系统,以使燃煤注汽锅炉系统产生的烟气经由引风机进入吸收塔以进行二氧化碳的捕集。In one embodiment, the inlet of the induced draft fan is connected to the coal-fired steam injection boiler system, so that the flue gas generated by the coal-fired steam injection boiler system enters the absorption tower through the induced draft fan for carbon dioxide capture.
本实用新型的有益效果如下:The beneficial effects of the present utility model are as follows:
在根据本实用新型的基于燃煤注汽锅炉系统供电的二氧化碳捕集系统中,完成第一热交换的贫液仍具有较高的热量,完成第一热交换的贫液在贫液冷却器中与经由贫液冷却器第二入口流入的除盐水进行第二热交换,贫液继续放热降温,除盐水吸热升温,吸热升温的除盐水流入到燃煤注汽锅炉系统中作为补给水使用,这一换热过程有效地回收了贫液的废热,且吸热升温的除盐水减少了燃煤注汽锅炉系统在加热补给水过程的耗煤量,进而降低了基于燃煤注汽锅炉系统供电的二氧化碳捕集系统捕集二氧化碳的成本;此外,燃煤注汽锅炉系统向汽轮发电机输出高温高压蒸汽,汽轮发电机将高温高压蒸汽转变为电能和低温低压蒸汽,富液泵和贫液泵电连接汽轮发电机发电接口,汽轮发电机产生的电能可用于富液泵和贫液泵的供电,从而节省了捕集二氧化碳过程中富液泵和贫液泵额外消耗的电能,降低了捕集成本;再者,产生的低温低压蒸汽直接通入到煮沸器中,并在煮沸器中与经由煮沸器第二入口进入的液体进行热交换,使得汽轮发电机产生的低温低压蒸汽得到了有效的回收利用,同时避免了额外向煮沸器提供蒸汽所消耗的能耗,节约了捕集成本;此外,低温低压蒸汽在煮沸器中放热降温后变为凝结水,凝结水直接注入到燃煤注汽锅炉系统中作为补给水使用,有效地回收、利用了废水,同时补给水在燃煤注汽锅炉系统需要加热转变为蒸汽,而凝结水相对于普通的锅炉补给水而言,具有较高的温度,具有较高温度的凝结水在燃煤注汽锅炉系统中转变为蒸汽的过程煤耗相比于普通的补给水更少,由此,凝结水的回收利用还降低了燃煤注汽锅炉系统的能耗,节约了成本。In the carbon dioxide capture system based on the power supply of the coal-fired steam injection boiler system according to the present invention, the lean liquid that has completed the first heat exchange still has relatively high heat, and the lean liquid that has completed the first heat exchange is stored in the lean liquid cooler. The second heat exchange is carried out with the demineralized water flowing in through the second inlet of the lean liquid cooler, the lean liquid continues to release heat to cool down, the demineralized water absorbs heat to heat up, and the demineralized water that absorbs heat and heats up flows into the coal-fired steam injection boiler system as make-up water Use, this heat exchange process effectively recovers the waste heat of the lean liquid, and the demineralized water that absorbs heat and increases the temperature reduces the coal consumption of the coal-fired steam injection boiler system in the process of heating the make-up water, thereby reducing the coal-fired steam injection boiler system. The cost of carbon dioxide capture system powered by the system; in addition, the coal-fired steam injection boiler system outputs high-temperature and high-pressure steam to the turbo-generator, which converts the high-temperature and high-pressure steam into electrical energy and low-temperature and low-pressure steam, and the rich liquid pump It is electrically connected to the power generation interface of the turbo-generator with the lean liquid pump, and the electric energy generated by the turbo-generator can be used to power the rich liquid pump and the lean liquid pump, thus saving the extra power consumed by the rich liquid pump and the lean liquid pump in the process of capturing carbon dioxide. , reducing the capture cost; in addition, the generated low-temperature and low-pressure steam is directly introduced into the boiler, and heat-exchanges with the liquid entering through the second inlet of the boiler in the boiler, so that the low-temperature steam generated by the turbine generator The low-pressure steam is effectively recycled, and at the same time, it avoids the energy consumption of additional steam provided to the boiler, and saves the cost of capturing; in addition, the low-temperature and low-pressure steam turns into condensed water after exothermic cooling in the boiler. It is directly injected into the coal-fired steam injection boiler system as make-up water, which effectively recovers and utilizes waste water. At the same time, the make-up water needs to be heated and converted into steam in the coal-fired steam injection boiler system. In other words, with a higher temperature, the coal consumption in the process of converting the condensate water with a higher temperature into steam in the coal-fired steam injection boiler system is less than that of ordinary make-up water, so the recovery and utilization of the condensate water is also reduced. The energy consumption of the coal-fired steam injection boiler system saves the cost.
附图说明Description of drawings
图1是根据本实用新型的基于燃煤注汽锅炉系统供电的二氧化碳捕集系统的示意图。1 is a schematic diagram of a carbon dioxide capture system powered by a coal-fired steam injection boiler system according to the present invention.
其中,附图标记说明如下:Among them, the reference numerals are described as follows:
11吸收塔 173注汽锅炉本体11
11A1吸收塔第一入口 173A注汽锅炉本体入口11A1 The first inlet of the
11A2吸收塔第二入口 173B1注汽锅炉本体第一出口11A2 The second inlet of the absorption tower 173B1 The first outlet of the steam injection boiler body
11B1吸收塔第一出口11B1 absorption tower first outlet
11B2吸收塔第二出口 173B2注汽锅炉本体第二出口11B2 The second outlet of the absorption tower 173B2 The second outlet of the steam injection boiler body
12富液泵12 Rich liquid pump
13贫富液换热器 18汽轮发电机13 Lean rich liquid heat exchanger 18 Turbogenerator
13A1贫富液换热器第一入口 18A汽轮发电机蒸汽入口13A1 lean-rich liquid heat exchanger
13A2贫富液换热器第二入口 18B汽轮发电机蒸汽出口13A2 The second inlet of the lean-rich
13B1贫富液换热器第一出口 18C汽轮发电机发电接口13B1 The first outlet of the lean and rich
13B2贫富液换热器第二出口 19煮沸器13B2 Lean and rich liquid heat exchanger
14解吸塔 19A1煮沸器第一入口14 Desorption tower 19A1 boiler first inlet
14A1解吸塔第一入口 19A2煮沸器第二入口14A1 The first inlet of the desorption tower 19A2 The second inlet of the boiler
14A2解吸塔第二入口 19B1煮沸器第一出口14A2 The second inlet of the desorption tower 19B1 The first outlet of the boiler
14B1解吸塔第一出口 19B2煮沸器第二出口14B1 The first outlet of the desorption tower 19B2 The second outlet of the boiler
14B2解吸塔第二出口 20再生气冷却器14B2 second outlet of
14B3解吸塔第三出口 20A1再生气冷却器第一入口14B3 The third outlet of the desorption tower 20A1 The first inlet of the regeneration gas cooler
15贫液泵 20A2再生气冷却器第二入口15 lean liquid pump 20A2 regeneration gas cooler second inlet
16贫液冷却器 20B1再生气冷却器第一出口16 Lean liquid cooler 20B1 First outlet of regeneration gas cooler
16A1贫液冷却器第一入口 20B2再生气冷却器第二出口16A1 First inlet of lean liquid cooler 20B2 Second outlet of regeneration gas cooler
16A2贫液冷却器第二入口 21压缩机16A2 lean liquid cooler
16B1贫液冷却器第一出口 21A压缩机入口16B1 lean liquid cooler
16B2贫液冷却器第二出口 21B压缩机出口16B2 Second outlet of lean liquid cooler 21B compressor outlet
17燃煤注汽锅炉系统 22压缩气冷却器17 Coal-fired steam
171锅炉除氧器 22A1压缩气冷却器第一入口171 boiler deaerator 22A1 compressed air cooler first inlet
171A1锅炉除氧器第一入口 22A2压缩气冷却器第二入口171A1 Boiler deaerator first inlet 22A2 Compressed gas cooler second inlet
171A2锅炉除氧器第二入口 22B1压缩气冷却器第一出口171A2 Boiler deaerator second inlet 22B1 Compressed gas cooler first outlet
171B锅炉除氧器出口 22B2压缩气冷却器第二出口171B boiler deaerator outlet 22B2 second outlet of compressed air cooler
172锅炉汽包 23引风机172
172A1锅炉汽包第一入口 23A引风机入口172A1 Boiler drum
172A2锅炉汽包第二入口 23B引风机出口172A2 The second inlet of the
172B锅炉汽包出口172B Boiler drum outlet
具体实施方式Detailed ways
参照图1,本实用新型的基于燃煤注汽锅炉系统供电的二氧化碳捕集系统包括吸收塔11、富液泵12、贫富液换热器13、解吸塔14、贫液泵15、贫液冷却器16、燃煤注汽锅炉系统17、汽轮发电机18、煮沸器19。本实用新型的基于燃煤注汽锅炉系统供电的二氧化碳捕集系统还包括再生气冷却器20、压缩机21、压缩气冷却器22和引风机23。Referring to FIG. 1 , the carbon dioxide capture system based on the power supply of the coal-fired steam injection boiler system of the present invention includes an
吸收塔11包括:吸收塔第一入口11A1,位于吸收塔11的下部,供烟气进入;吸收塔第二入口11A2,位于吸收塔11的上部;吸收塔第一出口11B1,位于吸收塔11的底部;吸收塔第二出口11B2,位于吸收塔11的顶部。The
贫富液换热器13包括:贫富液换热器第一入口13A1;贫富液换热器第二入口13A2;贫富液换热器第一出口13B1;贫富液换热器第二出口13B2。The lean-rich liquid heat exchanger 13 includes: a first inlet 13A1 of the lean-rich liquid heat exchanger; a second inlet 13A2 of the lean-rich liquid heat exchanger; a first outlet 13B1 of the lean-rich liquid heat exchanger; Exit 13B2.
富液泵12的一侧连通于吸收塔第一出口11B1,另一侧连通于贫富液换热器第一入口13A1。One side of the rich
解吸塔14包括:解吸塔第一入口14A1,位于解吸塔14的上部,连通贫富液换热器第一出口13B1;解吸塔第二入口14A2,位于解吸塔14的底部;解吸塔第一出口14B1,位于解吸塔14的底部;解吸塔第二出口14B2,位于解吸塔14的顶部;解吸塔第三出口14B3,位于解吸塔14的下部。The
贫液泵15的一侧连通于解吸塔第一出口14B1,另一侧连通于贫富液换热器第二入口13A2。One side of the lean
贫液冷却器16包括:贫液冷却器第一入口16A1,连通贫富液换热器第二出口13B2;贫液冷却器第二入口16A2,供外部除盐水进入;贫液冷却器第一出口16B1,连通于燃煤注汽锅炉系统17;贫液冷却器第二出口16B2,连通于吸收塔第二入口11A2。The
汽轮发电机18包括:汽轮发电机蒸汽入口18A,连通于燃煤注汽锅炉系统17;汽轮发电机蒸汽出口18B;汽轮发电机发电接口18C,分别电连接于富液泵12、贫液泵15(图1中的虚线代表电连接关系)。The turbogenerator 18 includes: a
煮沸器19包括:煮沸器第一入口19A1,连通于汽轮发电机蒸汽出口18B;煮沸器第二入口19A2,连通于解吸塔第三出口14B3;煮沸器第一出口19B1,连通于燃煤注汽锅炉系统17;煮沸器第二出口19B2,连通于解吸塔第二入口14A2。The
其中,烟气经由吸收塔第一入口11A1进入吸收塔11中且从下往上运动,吸收剂经由吸收塔第二入口11A2进入吸收塔11中且往下喷淋,往下喷淋的吸收剂与烟气逆流接触,从而吸收剂吸收烟气中的二氧化碳而变为富液,富液向下沉降,脱除了二氧化碳的烟气继续向上运动并经由吸收塔第二出口11B2排出;Among them, the flue gas enters the
富液经由富液泵12从吸收塔第一出口11B1、贫富液换热器第一入口13A1泵入到贫富液换热器13中进行第一热交换,富液吸热升温;The rich liquid is pumped into the lean-rich liquid heat exchanger 13 from the first outlet 11B1 of the absorption tower and the first inlet 13A1 of the lean-rich liquid heat exchanger via the rich
完成第一热交换的富液经由贫富液换热器第一出口13B1、解吸塔第一入口14A1进入解吸塔14中,富液在解吸塔14中被加热解吸并分解为贫液和二氧化碳,贫液在解吸塔14中向下沉降,二氧化碳向上运动并经由解吸塔第二出口14B2排出;The rich liquid that has completed the first heat exchange enters the
解吸塔14中解吸出的贫液经由贫液泵15从解吸塔第一出口14B1、贫富液换热器第二入口13A2泵入到贫富液换热器13中,与经由贫富液换热器第一入口13A1进入的富液进行前述的第一热交换,贫液放热降温;The lean liquid desorbed from the
完成第一热交换的贫液经由贫富液换热器第二出口13B2、贫液冷却器第一入口16A1进入贫液冷却器16中,与经由贫液冷却器第二入口16A2进入的除盐水进行第二热交换,贫液再次放热降温,降温后的贫液经由贫液冷却器第二出口16B2、吸收塔第二入口11A2进入吸收塔11中作为前述吸收剂使用;The lean liquid that has completed the first heat exchange enters the
经由贫液冷却器第二入口16A2进入的除盐水吸热升温,吸热升温后的除盐水经由贫液冷却器第一出口16B1进入燃煤注汽锅炉系统17中,以作为燃煤注汽锅炉系统17的补给水使用;The demineralized water entering through the second inlet 16A2 of the lean liquid cooler absorbs heat and heats up, and the demineralized water after the endothermic temperature rises enters the coal-fired steam
补给水(除盐水)在燃煤注汽锅炉系统17的作用下变为高温高压蒸汽,一部分高温高压蒸汽通入汽轮发电机18中,在汽轮发电机18中高温高压蒸汽转变为电能和低温低压蒸汽,汽轮发电机18的汽轮发电机发电接口18C电连接富液泵12和贫液泵15,以对富液泵12和贫液泵15提供电能;The make-up water (demineralized water) becomes high-temperature and high-pressure steam under the action of the coal-fired steam
低温低压蒸汽经由汽轮发电机蒸汽出口18B、煮沸器第一入口19A1进入煮沸器19中进行第三热交换;The low temperature and low pressure steam enters the
解吸塔14底的部分液体(可以是解吸彻底的贫液,也可以是解吸不彻底的半贫液)经由解吸塔第三出口14B3、煮沸器第二入口19A2进入煮沸器19中,与经由煮沸器第一入口19A1进入煮沸器19的低温低压蒸汽进行前述第三热交换,所述部分液体在煮沸器19中吸热升温而被部分汽化并由煮沸器第二出口19B2、解吸塔第二入口14A2进入解吸塔14中,以为解吸塔14中的富液解吸提供蒸汽和热量;煮沸器19中的低温低压蒸汽放热降温而变为凝结水,凝结水经由煮沸器第一出口19B1进入到燃煤注汽锅炉系统17中,以作为燃煤注汽锅炉系统17的补给水使用。Part of the liquid at the bottom of the desorption tower 14 (it may be a lean liquid with complete desorption, or a semi-lean liquid with incomplete desorption) enters the
需要说明的是,二氧化碳的吸收需要在较低的温度下进行,从而保证吸收塔11中的二氧化碳的吸收量达到最大化,而二氧化碳的解吸需要在较高的温度下进行,从而使得解吸塔14中的二氧化碳充分解吸出来。It should be noted that the absorption of carbon dioxide needs to be carried out at a lower temperature, so as to ensure that the absorption of carbon dioxide in the
在根据本实用新型的基于燃煤注汽锅炉系统供电的二氧化碳捕集系统中,经由吸收塔第一出口11B1排出的富液(为冷富液)流入到贫富液换热器13中,与经由解吸塔第一出口14B1流出的贫液(热贫液)进行第一热交换,富液吸热升温然后流入到解吸塔14中进行解吸,有效地利用了热贫液的废热;完成第一热交换的贫液仍具有较高的热量,完成第一热交换的贫液在贫液冷却器13中与经由贫液冷却器第二入口13A2流入的除盐水进行第二热交换,贫液被继续冷却,除盐水吸热升温,吸热升温的除盐水流入到燃煤注汽锅炉系统17中作为补给水使用,这一换热过程有效地回收了贫液的废热,且吸热升温的除盐水减少了燃煤注汽锅炉系统17在加热补给水过程的耗煤量,进而降低了基于燃煤注汽锅炉系统供电的二氧化碳捕集系统捕集二氧化碳的成本;此外,燃煤注汽锅炉系统17向汽轮发电机18输出高温高压蒸汽,汽轮发电机18将高温高压蒸汽转变为电能和低温低压蒸汽,富液泵12和贫液泵15电连接汽轮发电机发电接口18C,汽轮发电机18产生的电能可用于富液泵12和贫液泵15的供电,从而节省了捕集二氧化碳过程中富液泵12和贫液泵15额外消耗的电能,降低了捕集成本;再者,产生的低温低压蒸汽直接通入到煮沸器19中,并在煮沸器19中与经由煮沸器第二入口19A2进入的液体进行热交换,需要说明的是,低温低压蒸汽仍然具有很高的温度,而低温低压蒸汽直接流入煮沸器19中作为蒸汽使用,使得汽轮发电机18产生的低温低压蒸汽得到了有效的回收利用,同时避免了额外向煮沸器19提供蒸汽所消耗的能耗,节约了捕集成本;此外,低温低压蒸汽在煮沸器19中放热降温后变为凝结水,凝结水直接注入到燃煤注汽锅炉系统17中作为补给水使用,有效地回收、利用了废水(凝结水),同时补给水在燃煤注汽锅炉系统17需要加热转变为蒸汽,而凝结水相对于普通的锅炉补给水而言,具有较高的温度,具有较高温度的凝结水在燃煤注汽锅炉系统17中转变为蒸汽的过程煤耗相比于普通的补给水更少,由此,凝结水的回收利用还降低了燃煤注汽锅炉系统17的能耗,节约了成本。In the carbon dioxide capture system based on the power supply of the coal-fired steam injection boiler system according to the present invention, the rich liquid (cold rich liquid) discharged through the first outlet 11B1 of the absorption tower flows into the lean and rich liquid heat exchanger 13, and is mixed with the rich liquid heat exchanger 13. The lean liquid (hot lean liquid) flowing out through the first outlet 14B1 of the desorption tower carries out the first heat exchange, and the rich liquid absorbs heat and heats up and then flows into the
燃煤注汽锅炉系统17包括锅炉除氧器171、锅炉汽包172和注汽锅炉本体173。The coal-fired steam
锅炉除氧器171包括:锅炉除氧器第一入口171A1,连通贫液冷却器第一出口16B1;锅炉除氧器出口171B。The boiler deaerator 171 includes: a first inlet 171A1 of the boiler deaerator, which is connected to the first outlet 16B1 of the lean liquid cooler; and an
锅炉汽包172包括:锅炉汽包第一入口172A1,连通锅炉除氧器出口171B;锅炉汽包出口172B。The
注汽锅炉本体173包括:注汽锅炉本体入口173A,连通锅炉汽包出口172B;注汽锅炉本体第一出口173B1,连通汽轮发电机蒸汽入口18A;注汽锅炉本体第二出口173B2。The steam
其中,经由贫液冷却器第二入口16A2进入的除盐水进行前述第二热交换后吸热升温,吸热升温的除盐水经由贫液冷却器第一出口16B1、锅炉除氧器第一入口171A1进入锅炉除氧器171中进行除氧处理,脱氧的除盐水经由锅炉除氧器出口171B、锅炉汽包第一入口172A1进入锅炉汽包172中被汽化而变为蒸汽;蒸汽经由锅炉汽包出口172B、注汽锅炉本体入口173A进入注汽锅炉本体173中,蒸汽在注汽锅炉本体173中被加热而成为高温高压蒸汽,前述的一部分高温高压蒸汽经由注汽锅炉本体第一出口173B1、汽轮发电机蒸汽入口18A进入汽轮发电机18中,以向汽轮发电机18提供蒸汽;另一部分高温高压蒸汽经由注汽锅炉本体第二出口173B2流向外界。除盐水进行脱氧处理可以防止锅炉的氧腐蚀,提高注汽锅炉本体173的使用寿命。需要说明的是,高温高压蒸汽流入外界指的是流入油气田中使用。Among them, the demineralized water entering through the second inlet 16A2 of the lean liquid cooler undergoes the aforementioned second heat exchange and then endothermic temperature rises, and the demineralized water that has endothermic temperature rise passes through the first outlet 16B1 of the lean liquid cooler and the first inlet 171A1 of the boiler deaerator Entering the
如前所述,经由贫液冷却器第二入口16A2进入的除盐水(冷却水)对经由贫液冷却器第一入口16A1进入的贫液进行冷却,除盐水吸热升温,吸热升温的除盐水流入到燃煤注汽锅炉系统17中作为补给水使用,这一过程既有效地回收了贫液的废热,减少了燃煤注汽锅炉系统17将补给水加热而转变为蒸汽过程的煤耗,还避免了作为冷却剂使用的除盐水的浪费,降低了捕集成本。As mentioned above, the demineralized water (cooling water) entering through the second inlet 16A2 of the depleted liquid cooler cools the depleted liquid entering through the first inlet 16A1 of the depleted liquid cooler, the demineralized water absorbs heat and heats up, and the demineralized water that absorbs heat increases. The brine flows into the coal-fired steam
锅炉除氧器171还包括:锅炉除氧器第二入口171A2。The boiler deaerator 171 further includes: a second inlet 171A2 of the boiler deaerator.
基于燃煤注汽锅炉系统供电的二氧化碳捕集系统还包括再生气冷却器20、压缩机21、压缩气冷却器22。The carbon dioxide capture system powered by the coal-fired steam injection boiler system further includes a
再生气冷却器20包括:再生气冷却器第一入口20A1,连通解吸塔第二出口14B2;再生气冷却器第二入口20A2,供外部除盐水进入;再生气冷却器第一出口20B1,连通锅炉除氧器第二入口171A2;再生气冷却器第二出口20B2。The
压缩机21包括:压缩机入口21A,连通再生气冷却器第二出口20B2;压缩机出口21B。The
压缩气冷却器22包括:压缩气冷却器第一入口22A1,连通压缩机出口21B;压缩气冷却器第二入口22A2,供外部除盐水进入;压缩气冷却器第一出口22B1;压缩气冷却器第二出口22B2,连通锅炉除氧器第二入口171A2。The
其中,经由解吸塔第二出口14B2排出的二氧化碳经由再生气冷却器第一入口20A1进入再生气冷却器20中,与经由再生气冷却器第二入口20A2进入的除盐水进行第四热交换,Wherein, the carbon dioxide discharged through the second outlet 14B2 of the desorption tower enters the
二氧化碳放热降温然后经由再生气冷却器第二出口20B2、压缩机入口21A进入压缩机21中,二氧化碳被压缩机21压缩增压,增压后的二氧化碳升温升压然后经由压缩机出口21B、压缩气冷却器第一入口22A1进入压缩气冷却器22中进行第五热交换,二氧化碳再次放热降温,然后经由压缩气冷却器第一出口22B1排出;The carbon dioxide releases heat to cool down and then enters the
经由再生气冷却器第二入口20A2进入的除盐水与经由再生气冷却器第一入口20A1进入的二氧化碳进行前述第四热交换,除盐水吸热升温然后经由再生气冷却器第一出口20B1、锅炉除氧器第二入口171A2进入锅炉除氧器171中进行除氧,脱氧后的除盐水经由锅炉除氧器出口171B、锅炉汽包172入口进入锅炉汽包172中,以作为补给水使用;The demineralized water entering via the second inlet 20A2 of the regenerating gas cooler and the carbon dioxide entering via the first inlet 20A1 of the regenerating gas cooler perform the aforementioned fourth heat exchange, the demineralized water absorbs heat and raises the temperature and then passes through the first outlet 20B1 of the regenerating gas cooler, the boiler The second inlet 171A2 of the deaerator enters the
经由压缩气冷却器第二入口22A2进入的除盐水与经由压缩气冷却器第一入口22A1进入的二氧化碳进行前述第五热交换,除盐水吸热升温然后经由压缩气冷却器第二出口22B2、锅炉除氧器第二入口171A2进入锅炉除氧器171中进行除氧,脱氧后的除盐水经由锅炉除氧器出口171B、锅炉汽包172入口进入锅炉汽包172中,以作为补给水使用。The demineralized water entering through the second inlet 22A2 of the compressed gas cooler and the carbon dioxide entering through the first inlet 22A1 of the compressed gas cooler perform the aforementioned fifth heat exchange, the demineralized water absorbs heat and raises the temperature and then passes through the second outlet 22B2 of the compressed gas cooler, the boiler The second inlet 171A2 of the deaerator enters the
在基于燃煤注汽锅炉系统供电的二氧化碳捕集系统中,从解吸塔第二出口14B2排出的二氧化碳具有很高的热量,高热量的二氧化碳被经由再生气冷却器第二入口20A2进入的除盐水降温,然后吸热升温的除盐水进入锅炉系统中作为补给水使用,吸热升温的除盐水相对于燃煤注汽锅炉系统17普通的补给水而言,具有较高的热量,因此其在燃煤注汽锅炉系统17中转化为蒸汽的过程所需的燃煤用量大大降低,由此降低了燃煤注汽锅炉系统17加热补给水所需的煤耗,同时有效回收了二氧化碳所携带的废热,降低了能量的损耗;在压缩机21中增压后的二氧化碳具有高温高压,高温高压的二氧化碳在压缩气冷却器22中再次进行降温,经由压缩气冷却器第二入口22A2进入的除盐水吸热升温,然后吸热升温的除盐水进入燃煤注汽锅炉系统17中作为补给水使用,同上所述,吸热升温的除盐水相对于燃煤注汽锅炉系统17普通的补给水而言,具有较高的热量,因此其在燃煤注汽锅炉系统17中转化为蒸汽的过程所需的燃煤用量大大降低,有效回收了废热。完成第四热交换和第五热交换的二氧化碳流入到外界的二氧化碳输送管道中,以进行进一步的处理。In the carbon dioxide capture system powered by coal-fired steam injection boiler system, the carbon dioxide discharged from the second outlet 14B2 of the desorption tower has a high heat, and the high heat carbon dioxide is demineralized by the demineralized water entering through the second inlet 20A2 of the regeneration gas cooler Cooling, and then the demineralized water that absorbs heat and heats up enters the boiler system to be used as make-up water. The demineralized water that absorbs heat and heats up has higher heat than the ordinary make-up water of the coal-fired steam-
在一实施例中,汽轮发电机18的汽轮发电机发电接口18C还电连接于压缩机21,以向压缩机21供电。汽轮发电机18向压缩机21供电,避免了压缩机21需要额外的电能来运转,有效地利用了汽轮发电机18所产生的电能,降低了捕集成本。In one embodiment, the turbo-generator
在一实施例中,锅炉汽包172还包括锅炉汽包第二入口172A2,锅炉汽包第二入口172A2与煮沸器第一出口19B1连通;其中,经由煮沸器第一出口19B1排出的凝结水通过锅炉汽包第二入口172A2进入锅炉汽包172中,以作为锅炉汽包172的补给水使用。凝结水初始来源于燃煤锅炉173释放的高温高压蒸汽,因此,凝结水无需脱氧处理便可直接通入到锅炉汽包172中再次作为补给水使用,且凝结水带有热量,直接通入到锅炉汽包172中,能够降低凝结水转变为蒸汽所需的煤耗,同时凝结水得到了有效地回收利用,降低了损耗。In one embodiment, the
燃煤锅炉的二氧化碳捕集系统还包括引风机23,引风机23包括:引风机入口23A,供外部烟气进入;引风机出口23B,连通吸收塔第一入口11A1;其中,外部的烟气经由引风机入口23A进入到引风机23中,然后经由引风机出口23B、吸收塔第一入口11A1进入到吸收塔11中。The carbon dioxide capture system of the coal-fired boiler also includes an induced
汽轮发电机18的汽轮发电机发电接口18C还电连接于引风机23,以向引风机23供电。汽轮发电机18向引风机23供电,避免了引风机23需要额外的电能来运转,有效地利用了汽轮发电机18所产生的电能,降低了捕集成本。The turbo-generator
在一实施例中,引风机入口23A连通于燃煤注汽锅炉系统17,以使燃煤注汽锅炉系统17产生的烟气经由引风机23进入吸收塔11以进行二氧化碳的捕集。这一设计有效地将燃煤注汽锅炉系统产生的烟气进行了处理,减少了二氧化碳的排放。In one embodiment, the induced
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