WO2021238023A1 - Carbon dioxide capture and utilization system integrated with steel mill, and use method thereof - Google Patents
Carbon dioxide capture and utilization system integrated with steel mill, and use method thereof Download PDFInfo
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
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- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1418—Recovery of products
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01D—SEPARATION
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- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- C—CHEMISTRY; METALLURGY
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Abstract
A carbon dioxide capture and utilization system integrated with a steel mill, and a use method thereof. The system comprises a regeneration tower (1). CO2 gas at the top of the regeneration tower (1) is introduced into the lower end of a cooling tower (4). A gas outlet at the top of the cooling tower (4) is in communication with an inlet of a carbon dioxide compressor (9). An outlet of the carbon dioxide compressor (9) is divided into two paths. One path is in communication with a CO2 gas inlet of a liquefier (14), and the other path is in communication with a cushion tank (10). An outlet at the top of the cushion tank (10) is in communication with an inlet of a valve station (11). An outlet of the valve station (11) is in communication with the bottom of a converter (12).
Description
本发明属于二氧化碳捕集、利用与封存技术领域，特别涉及一种与钢厂集成的二氧化碳捕集利用系统及其使用方法。The invention belongs to the technical field of carbon dioxide capture, utilization and storage, and particularly relates to a carbon dioxide capture and utilization system integrated with a steel plant and a use method thereof.
全球气候变化已经成为国际社会关注的热点。低碳发展作为解决气候变化问题、协调社会经济发展的综合路径，为应对气候变化提供了新的机遇。中国年产钢约6亿吨，按吨钢CO
2排放量2.3吨计算，总排放量达到13.8亿吨，成为CO
2排放的大户，占国内工业总排放量的16％左右。在全球碳排放控制日趋严格的大环境下，大力发展钢铁行业低碳技术、推广低碳技术的应用，是钢铁行业实现低碳发展，保证绿色可持续发展的有效途径。
Global climate change has become a hot spot of concern to the international community. Low-carbon development, as a comprehensive path to solve the problem of climate change and coordinate social and economic development, provides new opportunities for tackling climate change. China produces about 600 million tons of steel per year. Calculated on the basis of 2.3 tons of CO 2 emissions per ton of steel, the total emissions have reached 1.38 billion tons, making it a major CO 2 emission producer, accounting for about 16% of the total domestic industrial emissions. In the context of increasingly stringent global carbon emissions control, vigorously developing low-carbon technologies in the steel industry and promoting the application of low-carbon technologies are an effective way for the steel industry to achieve low-carbon development and ensure green and sustainable development.
现钢厂吹炼采用氩气，一部分氩气来自于空分系统，另一部分氩气来自于市场采购，用成本较低的CO
2代替部分成本较高的氩气用作炼钢过程的搅拌气源、反应介质及保护气源，是降低CO
2排放、实现炼钢过程节能降耗及提高钢水质量的有效手段，目前已经取得了显著的研究进展。但钢厂采用的CO
2气源多为外购低温液态工业二氧化碳，不仅成本高，而且使用前需加压升温，消耗大量热能，并受到外部供货连续性的扰动，影响钢厂长期稳定生产。
The current steel plant uses argon gas for blowing, part of the argon gas comes from the air separation system, and the other part of the argon gas comes from market purchases. The lower cost CO 2 is used to replace part of the higher cost argon gas as the stirring gas in the steelmaking process. Sources, reaction media and protective gas sources are effective means to reduce CO 2 emissions, realize energy saving and consumption reduction in the steelmaking process, and improve the quality of molten steel. At present, significant research progress has been made. However, the CO 2 gas source used by steel plants is mostly purchased low-temperature liquid industrial carbon dioxide, which is not only expensive, but also needs to be pressurized and heated before use, consumes a lot of heat energy, and is disturbed by the continuity of external supply, which affects the long-term stable production of steel plants. .
发明内容Summary of the invention
为了克服上述现有技术存在的缺点，本发明的目的在于提供一种与钢厂集成的二氧化碳捕集利用系统及其使用方法，尤其适用于燃煤锅炉烟道气、高炉煤气等产生的烟气中低浓度二氧化碳的捕集，将二氧化碳回收的同时用作转炉底吹气，用以减少钢厂二氧化碳的排放和降低吹炼系统用气成本。In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a carbon dioxide capture and utilization system integrated with a steel plant and its use method, especially suitable for flue gas generated by coal-fired boiler flue gas, blast furnace gas, etc. The medium and low concentration carbon dioxide is captured, and the carbon dioxide is recovered as the bottom blowing gas of the converter to reduce the carbon dioxide emission of the steel plant and reduce the gas cost of the blowing system.
为了达到上述目的，本发明采用以下技术方案：一种与钢厂集成的二氧化碳捕集利用系统，包括再生塔，所述再生塔顶部的CO
2气体通入降温塔下端，降温塔顶端气体出口与二氧化碳压缩机入口连通，二氧化碳压缩机出口分为两路，一路与液化器的CO
2气体入口连通，另一路与缓冲罐连通，所述缓冲罐顶部出口与阀站入口连通，阀站出口与转炉底部连通。
In order to achieve the above objectives, the present invention adopts the following technical solutions: a carbon dioxide capture and utilization system integrated with a steel plant, including a regeneration tower, the CO 2 gas at the top of the regeneration tower is passed into the lower end of the cooling tower, and the gas outlet at the top of the cooling tower is connected with The inlet of the carbon dioxide compressor is connected, and the outlet of the carbon dioxide compressor is divided into two paths, one is connected to the CO 2 gas inlet of the liquefier, the other is connected to the buffer tank, the top outlet of the buffer tank is connected to the valve station inlet, and the valve station outlet is connected to the converter The bottom is connected.
进一步的，所述液化器的CO
2液体出口与CO
2储槽入口连通，CO
2储槽出口与增压泵入口连通，增压泵出口分为两路，一路去往液体CO
2槽车，另一路与气化器的液体CO
2入口连通，气化器气体CO
2出口与缓冲罐连通，气化器冷端去往凝结水箱。
Further, the CO 2 liquid outlet of the liquefier is connected with the inlet of the CO 2 storage tank, the outlet of the CO 2 storage tank is connected with the inlet of the booster pump, and the outlet of the booster pump is divided into two ways, one way to the liquid CO 2 tanker, The other way is connected with the liquid CO 2 inlet of the gasifier, the gas CO 2 outlet of the gasifier is connected with the buffer tank, and the cold end of the gasifier goes to the condensate tank.
进一步的，所述再生塔下段连接有再沸器，再沸器蒸汽入口与来自蒸汽管网的低压蒸汽管道连通，再沸器凝结水出口分为两路，一路去厂区凝结水箱，另一路与气化器热端相连，再沸器溶液入口与再生塔中段连通，再沸器溶液出口与再生塔下段连通。Further, a reboiler is connected to the lower section of the regeneration tower, the steam inlet of the reboiler is connected with a low-pressure steam pipe from the steam pipe network, and the condensate outlet of the reboiler is divided into two routes, one goes to the plant condensate tank, and the other goes to the plant condensate tank. The hot end of the vaporizer is connected, the solution inlet of the reboiler is connected with the middle section of the regeneration tower, and the solution outlet of the reboiler is connected with the lower section of the regeneration tower.
进一步的，所述的降温塔分为上下两段，下段液体出口与水洗泵入口相连，水洗泵出口一端与水冷器热端相连，另一端与再生塔上端连通，水冷器冷端与降温塔下段液体入口相连，降温塔上段液体出口与氨冷泵入口连通，氨冷泵出口与氨冷器热端连通，氨冷器冷端与降温塔上段液体入口连通。Further, the cooling tower is divided into two upper and lower sections, the liquid outlet of the lower section is connected to the inlet of the water washing pump, one end of the water washing pump outlet is connected to the hot end of the water cooler, the other end is connected to the upper end of the regeneration tower, and the cold end of the water cooler is connected to the lower section of the cooling tower. The liquid inlet is connected, the liquid outlet of the upper section of the cooling tower is connected with the inlet of the ammonia cooling pump, the outlet of the ammonia cooling pump is connected with the hot end of the ammonia cooler, and the cold end of the ammonia cooler is connected with the liquid inlet of the upper section of the cooling tower.
进一步的，所述氨冷器的冷源由氨压缩机提供，氨冷器冷源入口与氨压缩机出口连通，氨冷器冷源出口与氨压缩机入口连通。Further, the cold source of the ammonia cooler is provided by an ammonia compressor, the cold source inlet of the ammonia cooler is in communication with the outlet of the ammonia compressor, and the cold source outlet of the ammonia cooler is in communication with the inlet of the ammonia compressor.
进一步的，所述液化器的冷源由氨压缩机提供，液化器冷源入口与氨压缩机出口连通，液化器冷源出口与氨压缩机入口连通。Further, the cold source of the liquefier is provided by an ammonia compressor, the cold source inlet of the liquefier is communicated with the outlet of the ammonia compressor, and the cold source outlet of the liquefier is communicated with the inlet of the ammonia compressor.
进一步的，所述的再生塔顶部设置有除沫器。Further, a demister is provided on the top of the regeneration tower.
本发明还提供了一种与钢厂集成的二氧化碳捕集利用系统的使用方法，将吸收过燃煤锅炉烟道气或高炉煤气中CO
2的富液通入再生塔上端填料层进行解吸再生，解吸后的半贫液由再生塔中段进入再沸器加热到110℃，再沸器的热源采用低压蒸汽，再沸器凝结水出口分为两路，一路去厂区凝结水箱，另一路为气化器提供热源，经加热再生后的贫液由再生塔底部通往吸收塔上端，吸收溶剂循环使用；
The present invention also provides a method for using a carbon dioxide capture and utilization system integrated with a steel plant . The rich liquid that has absorbed the CO 2 in the flue gas of the coal-fired boiler or the blast furnace gas is passed into the packing layer at the upper end of the regeneration tower for desorption and regeneration. The desorbed semi-lean liquid enters the reboiler from the middle section of the regeneration tower and is heated to 110°C. The heat source of the reboiler is low-pressure steam. The condensate outlet of the reboiler is divided into two routes, one goes to the plant condensate tank, and the other is gasification. The heat source is provided by the heater, and the lean liquid after heating and regeneration flows from the bottom of the regeneration tower to the upper end of the absorption tower, and the absorption solvent is recycled for use;
所述再生塔顶部的CO
2气体经除沫器进入降温塔降温，降温塔分为上下两段，下段冷源采用厂区循环冷却水，CO
2气体冷却到40℃后进入降温塔上段，下段冷源采用液氨，CO
2气体冷却到5℃后进入二氧化碳压缩机；
The reproducing the CO 2 gas at the top of the column through the demister into the cooling tower to cool the cooling tower is divided into two sections, the lower section of the cold source is plant circulating cooling water, the CO 2 gas was cooled to 40 ℃ into the segments on the cooling tower, and the lower cold The source uses liquid ammonia, and the CO 2 gas is cooled to 5°C and then enters the carbon dioxide compressor;
气态CO
2经二氧化碳压缩机升压至3Mpa后分为两路，一路气体CO
2进入缓冲罐，缓冲罐出来的CO
2气体通往阀站，经阀站调节流量与压力后，通往转炉底部，用于炼钢底吹，另一路气体CO
2去往液化器，经液化器液化后去增压泵；
The gaseous CO 2 is boosted to 3Mpa by the carbon dioxide compressor and divided into two paths. One way is the gas CO 2 enters the buffer tank, and the CO 2 gas from the buffer tank leads to the valve station. After adjusting the flow and pressure through the valve station, it leads to the bottom of the converter. , Used for bottom blowing in steelmaking, the other gas CO 2 goes to the liquefier, after being liquefied in the liquefier, it goes to the booster pump;
增压泵出口分为两路，一路去往液体CO
2槽车，用于销售液体CO
2产品，另一路与气化器液体CO
2入口连通，气化后的气体CO
2去往缓冲罐，用于钢材吹炼气调峰；
The outlet of the booster pump is divided into two paths, one goes to the liquid CO 2 tanker, which is used to sell liquid CO 2 products, and the other is connected to the liquid CO 2 inlet of the vaporizer, and the gasified CO 2 goes to the buffer tank. Used for steel blowing gas peak shaving;
氨压缩机为氨冷器和液化器提供冷源。The ammonia compressor provides the cold source for the ammonia cooler and the liquefier.
与现有技术相比，本发明至少具有以下有益效果，本发明将二氧化碳捕集技术与利用技术相结合，在从钢厂燃煤锅炉烟道气或者高炉煤气所捕集的二氧化碳通过压缩机加压，加压后分为两路，一路直接送入转炉用于碳钢或不锈钢等钢材的吹炼，替代部分氩气，不仅可以降低该部分用气的成本，而且有望大大降低剩余部分氩气的采购成本，另一路降温液化后存储在CO
2储槽，储槽里的液态CO
2一方面可用于钢材吹炼气调峰，另一方面可用于销售，可以在获取双重经济效益的同时实现CO
2的减排与资源化利用。本发明还将蒸汽进行多级有效利用，从厂区蒸汽主管道引接的低压蒸汽用于对再沸器内的富液进行加热，低压蒸汽与气化器热端相连可用于对气化器内的液态CO
2进行加热，在充分利用蒸汽热量的同时，减少了对蒸汽凝结水进行冷却的冷却水耗量。
Compared with the prior art, the present invention has at least the following beneficial effects. The present invention combines carbon dioxide capture technology with utilization technology. The carbon dioxide captured from the flue gas or blast furnace gas of a coal-fired boiler in a steel plant is fed by a compressor. After pressing and pressurizing, it is divided into two paths. One way is directly sent to the converter for the blowing of carbon steel or stainless steel, replacing part of the argon. The other way is stored in the CO 2 storage tank after cooling and liquefaction. On the one hand, the liquid CO 2 in the storage tank can be used for peak shaving of steel blowing gas, and on the other hand, it can be used for sales, which can achieve double economic benefits at the same time. CO 2 emission reduction and resource utilization. The invention also makes effective use of steam in multiple stages. The low-pressure steam introduced from the main steam pipeline of the plant is used to heat the rich liquid in the reboiler. The low-pressure steam is connected to the hot end of the vaporizer and can be used to The liquid CO 2 is heated, and while making full use of the steam heat, it reduces the cooling water consumption for cooling the steam condensate.
图1为本发明的结构示意图。Figure 1 is a schematic diagram of the structure of the present invention.
其中，1为再生塔，2为除沫器，3为再沸器，4为降温塔，5为氨冷器，6为氨冷泵，7为水冷泵，8为水冷器，9为二氧化碳压缩机，10为缓冲罐，11为阀站，12为转炉，13为氨压缩机，14为液化器，15为CO
2储槽，16为增压泵，17为气化器。
Among them, 1 is a regeneration tower, 2 is a demister, 3 is a reboiler, 4 is a cooling tower, 5 is an ammonia cooler, 6 is an ammonia cooling pump, 7 is a water-cooled pump, 8 is a water cooler, and 9 is a carbon dioxide compressor Engine, 10 is a buffer tank, 11 is a valve station, 12 is a converter, 13 is an ammonia compressor, 14 is a liquefier, 15 is a CO 2 storage tank, 16 is a booster pump, and 17 is a gasifier.
下面结合附图和具体实施方式对本发明作更详细的说明。The present invention will be described in more detail below in conjunction with the drawings and specific embodiments.
如图1所示，本发明的一种与钢厂集成的二氧化碳捕集利用系统包括与再生塔1下段相连的再沸器3，再沸器3蒸汽入口与来自蒸汽管网的低压蒸汽管道连通，再沸器3凝结水出口分为两路，一路去厂区凝结水箱，另一路与气化器17热端相连，再沸器3溶液入口与再生塔1中段连通，再沸器3溶液出口与再生塔1下段连通；再生塔1顶部设置有除沫器2，再生塔1顶部的CO
2气体与降温塔4下端连通，降温塔4顶端气体出口与二氧化碳压缩机9入口连通，二氧化碳压缩机9出口分为两路，一路与液化器14的CO
2气体入口连通，另一路与缓冲罐10连通，缓冲罐10顶部出口与阀站11入口连通，阀站11出口与转炉12底部连通；
As shown in Figure 1, a carbon dioxide capture and utilization system integrated with a steel plant of the present invention includes a reboiler 3 connected to the lower section of the regeneration tower 1, and the steam inlet of the reboiler 3 is connected to a low-pressure steam pipe from a steam pipe network. , The condensate outlet of reboiler 3 is divided into two routes, one goes to the plant condensate tank, the other is connected to the hot end of vaporizer 17, the solution inlet of reboiler 3 is connected to the middle section of regeneration tower 1, and the solution outlet of reboiler 3 is connected with The lower part of the regeneration tower 1 is connected; the top of the regeneration tower 1 is provided with a demister 2, the CO 2 gas at the top of the regeneration tower 1 is connected to the lower end of the cooling tower 4, the gas outlet at the top of the cooling tower 4 is connected to the inlet of the carbon dioxide compressor 9, and the carbon dioxide compressor 9 The outlet is divided into two paths, one is connected to the CO 2 gas inlet of the liquefier 14, the other is connected to the buffer tank 10, the top outlet of the buffer tank 10 is connected to the inlet of the valve station 11, and the outlet of the valve station 11 is connected to the bottom of the converter 12;
降温塔4分为上下两段，下段液体出口与水洗泵7入口相连，水洗泵7出口一端与水冷器8热端相连，另一端与再生塔1上端连通，水冷器8冷端与降温塔4下段液体入口相连，降温塔4上段液体出口与氨冷泵6入口连通，氨冷泵6出口与氨冷器5热端连通，氨冷器5冷端与降温塔4上段液体入口连通；氨冷器5的冷源由氨压缩机13提供，氨冷器5冷源入口与氨压缩机13出口连通，氨冷器5冷源出口与氨压缩机13入口连通；液化器14的冷源由氨压缩机13提供，液化器14冷源入口与氨压缩机13出口连通，液化器14冷源出口与氨压缩机13入口连通；液化器14的CO
2液体出口与CO
2储槽15入口连通，CO
2储槽15出口与增压泵16入口连通，增压泵16出口分为两路，一路去往液体CO
2槽车，另一路与气化器17液体CO
2入口连通，气化器17气体CO
2出口与缓冲罐10连通，气化器17冷端去往凝结水箱。
The cooling tower 4 is divided into upper and lower sections. The liquid outlet of the lower section is connected to the inlet of the washing pump 7. One end of the outlet of the washing pump 7 is connected with the hot end of the water cooler 8, the other end is connected with the upper end of the regeneration tower 1, and the cold end of the water cooler 8 is connected to the cooling tower 4. The lower liquid inlet is connected, the upper liquid outlet of the cooling tower 4 is connected with the inlet of the ammonia cooling pump 6, the outlet of the ammonia cooling pump 6 is connected with the hot end of the ammonia cooler 5, and the cold end of the ammonia cooler 5 is connected with the upper liquid inlet of the cooling tower 4; The cold source of the device 5 is provided by the ammonia compressor 13, the cold source inlet of the ammonia cooler 5 is connected with the outlet of the ammonia compressor 13, and the cold source outlet of the ammonia cooler 5 is connected with the inlet of the ammonia compressor 13; the cold source of the liquefier 14 is provided by ammonia The compressor 13 is provided, the cold source inlet of the liquefier 14 is connected with the outlet of the ammonia compressor 13, the cold source outlet of the liquefier 14 is connected with the inlet of the ammonia compressor 13; the CO 2 liquid outlet of the liquefier 14 is connected with the inlet of the CO 2 storage tank 15, The outlet of the CO 2 storage tank 15 is connected to the inlet of the booster pump 16, and the outlet of the booster pump 16 is divided into two paths, one is to the liquid CO 2 tanker, and the other is connected to the liquid CO 2 inlet of the vaporizer 17, and the vaporizer 17 The gas CO 2 outlet is connected to the buffer tank 10, and the cold end of the gasifier 17 goes to the condensate tank.
本发明的工艺过程和原理为：The process and principle of the present invention are:
吸收过燃煤锅炉烟道气或高炉煤气中CO
2的富液进入再生塔1上端填料层进行解吸再生，解吸再生得到的CO2气体进入再生塔1顶部，解吸后的半贫液由再生塔1中段进入再沸器3加热到110℃，再沸器3的热源采用低压蒸汽，再沸器3凝结水出口分为两路，一路去厂区凝结水箱，另一路为气化器17提供热源，经加热再生后的贫液由再生塔1底部通往吸收塔上端，吸收溶剂循环使用。
The rich liquid that has absorbed CO 2 in coal-fired boiler flue gas or blast furnace gas enters the upper packing layer of regeneration tower 1 for desorption and regeneration. The CO2 gas obtained from desorption and regeneration enters the top of regeneration tower 1, and the desorbed semi-lean liquid is discharged from regeneration tower 1. The middle section enters the reboiler 3 and is heated to 110°C. The heat source of the reboiler 3 adopts low-pressure steam. The condensate outlet of the reboiler 3 is divided into two routes. The lean liquid after heating and regeneration flows from the bottom of the regeneration tower 1 to the upper end of the absorption tower, and the absorption solvent is recycled for use.
再生塔1顶部的CO
2气体经除沫器2进入降温塔4降温，降温塔4分为上下两段，下段冷源采用厂区循环冷却水，CO
2气体冷却到40℃后进入降温塔4上段，下段冷源采用液氨，CO
2气体冷却到5℃后进入二氧化碳压缩机9。
The CO 2 gas at the top of the regeneration tower 1 enters the cooling tower 4 through the demister 2 to cool down. The cooling tower 4 is divided into upper and lower sections. The cooling source in the lower section uses plant circulating cooling water, and the CO 2 gas enters the upper section of the cooling tower 4 after cooling to 40°C. , The lower cooling source adopts liquid ammonia, and the CO 2 gas enters the carbon dioxide compressor 9 after being cooled to 5°C.
气态CO
2经二氧化碳压缩机9升压至3Mpa后分为两路，一路气体CO
2进入缓冲罐10，缓冲罐10出来的CO
2气体通往阀站11，经阀站调节流量与压力后，通往转炉12底部，用于炼钢底吹，另一路气体CO
2去往液化器14，经液化器14液化后去增压泵16。
The gaseous CO 2 is boosted to 3Mpa by the carbon dioxide compressor 9 and divided into two paths. One way of gas CO 2 enters the buffer tank 10, and the CO 2 gas from the buffer tank 10 leads to the valve station 11. After the valve station adjusts the flow and pressure, It leads to the bottom of the converter 12 and is used for bottom blowing in steelmaking. The other gas CO 2 goes to the liquefier 14, after being liquefied by the liquefier 14, it goes to the booster pump 16.
增压泵16出口分为两路，一路去往液体CO
2槽车，用于销售液体CO
2产品，另一路与气化器17液体CO
2入口连通，气化后的气体CO
2去往缓冲罐10，用于钢材吹炼气调峰。
The outlet of the booster pump 16 is divided into two paths, one goes to the liquid CO 2 tanker, which is used to sell liquid CO 2 products, and the other is connected to the liquid CO 2 inlet of the vaporizer 17, and the gasified CO 2 goes to the buffer Tank 10 is used for peak shaving of steel blowing gas.
氨压缩机13同时为氨冷器5和液化器14提供冷源。The ammonia compressor 13 provides cold sources for the ammonia cooler 5 and the liquefier 14 at the same time.
该系统有效的将二氧化碳捕集技术与利用技术相结合，从燃煤锅炉烟道气或者高炉煤气捕集得到的二氧化碳产品加压后分为两路，一路直接送入转炉用于碳钢或不锈钢等钢材的吹炼， 替代部分氩气，不仅可以降低该部分用气的成本，而且有望大大降低剩余部分氩气的采购成本，另一路降温液化后存储在CO
2储槽，储槽里的液态CO
2一方面可用于钢材吹炼气调峰，另一方面可用于销售，可以在获取双重经济效益的同时实现CO
2的减排与资源化利用。
The system effectively combines carbon dioxide capture technology with utilization technology. The carbon dioxide product captured from coal-fired boiler flue gas or blast furnace gas is pressurized and divided into two paths, and one way is directly sent to the converter for carbon steel or stainless steel. Substituting part of the argon for steel blowing can not only reduce the cost of this part of the gas, but also is expected to greatly reduce the purchase cost of the remaining part of the argon. The other way is cooled and liquefied and stored in the CO 2 storage tank. On the one hand, CO 2 can be used for peak shaving of steel refining gas, and on the other hand, it can be used for sales. It can achieve CO 2 emission reduction and resource utilization while obtaining double economic benefits.
Claims (9)
- 一种与钢厂集成的二氧化碳捕集利用系统，其特征在于，包括再生塔(1)，所述再生塔(1)顶部的CO 2气体通入降温塔(4)下端，降温塔(4)顶端气体出口与二氧化碳压缩机(9)入口连通，二氧化碳压缩机(9)出口分为两路，一路与液化器(14)的CO 2气体入口连通，另一路与缓冲罐(10)连通，所述缓冲罐(10)顶部出口与阀站(11)入口连通，阀站(11)出口与转炉(12)底部连通。 A carbon dioxide capture and utilization system integrated with a steel plant is characterized by comprising a regeneration tower (1), the CO 2 gas at the top of the regeneration tower (1) is passed into the lower end of the cooling tower (4), and the cooling tower (4) The top gas outlet is connected to the inlet of the carbon dioxide compressor (9). The outlet of the carbon dioxide compressor (9) is divided into two paths, one is connected to the CO 2 gas inlet of the liquefier (14), and the other is connected to the buffer tank (10). The outlet at the top of the buffer tank (10) is communicated with the inlet of the valve station (11), and the outlet of the valve station (11) is communicated with the bottom of the converter (12).
- 根据权利要求1所述的一种与钢厂集成的二氧化碳捕集利用系统，其特征在于，所述液化器(14)的CO 2液体出口与CO 2储槽(15)入口连通，CO 2储槽(15)出口与增压泵(16)入口连通，增压泵(16)出口分为两路，一路去往液体CO 2槽车，另一路与气化器(17)的液体CO 2入口连通，气化器(17)气体CO 2出口与缓冲罐(10)连通，气化器(17)冷端去往凝结水箱。 The carbon dioxide capture and utilization system integrated with a steel plant according to claim 1, wherein the CO 2 liquid outlet of the liquefier (14) is in communication with the CO 2 storage tank (15) inlet, and the CO 2 storage The outlet of the tank (15) is connected with the inlet of the booster pump (16), and the outlet of the booster pump (16) is divided into two paths, one goes to the liquid CO 2 tanker, and the other goes to the liquid CO 2 inlet of the vaporizer (17) Connected, the gas CO 2 outlet of the gasifier (17) is connected with the buffer tank (10), and the cold end of the gasifier (17) goes to the condensate tank.
- 根据权利要求1所述的一种与钢厂集成的二氧化碳捕集利用系统，其特征在于，所述再生塔(1)下段连接有再沸器(3)，再沸器(3)蒸汽入口与来自蒸汽管网的低压蒸汽管道连通，再沸器(3)凝结水出口分为两路，一路去厂区凝结水箱，另一路与气化器(17)热端相连，再沸器(3)溶液入口与再生塔(1)中段连通，再沸器(3)溶液出口与再生塔(1)下段连通。A carbon dioxide capture and utilization system integrated with a steel plant according to claim 1, wherein the lower section of the regeneration tower (1) is connected with a reboiler (3), and the steam inlet of the reboiler (3) is connected with The low-pressure steam pipeline from the steam pipe network is connected, and the condensate outlet of the reboiler (3) is divided into two paths, one goes to the condensate tank in the plant area, and the other is connected to the hot end of the vaporizer (17), and the reboiler (3) solution The inlet is connected with the middle section of the regeneration tower (1), and the solution outlet of the reboiler (3) is connected with the lower section of the regeneration tower (1).
- 根据权利要求1所述的一种与钢厂集成的二氧化碳捕集利用系统，其特征在于，所述的降温塔(4)分为上下两段，下段液体出口与水洗泵(7)入口相连，水洗泵(7)出口一端与水冷器(8)热端相连，另一端与再生塔(1)上端连通，水冷器(8)冷端与降温塔(4)下段液体入口相连，降温塔(4)上段液体出口与氨冷泵(6)入口连通，氨冷泵(6)出口与氨冷器(5)热端连通，氨冷器(5)冷端与降温塔(4)上段液体入口连通。The carbon dioxide capture and utilization system integrated with a steel plant according to claim 1, wherein the cooling tower (4) is divided into two upper and lower sections, and the liquid outlet of the lower section is connected with the inlet of the washing pump (7), One end of the outlet of the water washing pump (7) is connected with the hot end of the water cooler (8), the other end is connected with the upper end of the regeneration tower (1), and the cold end of the water cooler (8) is connected with the lower liquid inlet of the cooling tower (4). ) The upper liquid outlet is connected with the inlet of the ammonia cooling pump (6), the outlet of the ammonia cooling pump (6) is connected with the hot end of the ammonia cooler (5), and the cold end of the ammonia cooler (5) is connected with the upper liquid inlet of the cooling tower (4) .
- 根据权利要求1所述的一种与钢厂集成的二氧化碳捕集利用系统，其特征在于，所述氨冷器(5)的冷源由氨压缩机(13)提供，氨冷器(5)冷源入口与氨压缩机(13)出口连通，氨冷器(5)冷源出口与氨压缩机(13)入口连通。The carbon dioxide capture and utilization system integrated with a steel plant according to claim 1, wherein the cold source of the ammonia cooler (5) is provided by an ammonia compressor (13), and the ammonia cooler (5) The cold source inlet is communicated with the outlet of the ammonia compressor (13), and the cold source outlet of the ammonia cooler (5) is communicated with the inlet of the ammonia compressor (13).
- 根据权利要求1所述的一种与钢厂集成的二氧化碳捕集利用系统，其特征在于，所述液化器(14)的冷源由氨压缩机(13)提供，液化器(14)冷源入口与氨压缩机(13)出口连通，液化器(14)冷源出口与氨压缩机(13)入口连通。The carbon dioxide capture and utilization system integrated with a steel plant according to claim 1, wherein the cold source of the liquefier (14) is provided by an ammonia compressor (13), and the cold source of the liquefier (14) The inlet is communicated with the outlet of the ammonia compressor (13), and the cold source outlet of the liquefier (14) is communicated with the inlet of the ammonia compressor (13).
- 根据权利要求1所述的一种与钢厂集成的二氧化碳捕集利用系统，其特征在于，所述的再生塔(1)顶部设置有除沫器(2)。A carbon dioxide capture and utilization system integrated with a steel plant according to claim 1, characterized in that a demister (2) is provided on the top of the regeneration tower (1).
- 根据权利要求1-7任一项所述的一种与钢厂集成的二氧化碳捕集利用系统的使用方法，其特征在于，将吸收过燃煤锅炉烟道气或高炉煤气中CO 2的富液通入再生塔(1)上端填料层进行解吸再生，解吸后的半贫液由再生塔(1)中段进入再沸器(3)加热到110℃，再沸器(3)的热源采用低压蒸汽，再沸器(3)凝结水出口分为两路，一路去厂区凝结水箱，另一路为气化器(17)提供热源，经加热再生后的贫液由再生塔(1)底部通往吸收塔上端，吸收溶剂循环使用； The use method of a carbon dioxide capture and utilization system integrated with a steel plant according to any one of claims 1-7, wherein the rich liquid that has absorbed CO 2 in the flue gas of a coal-fired boiler or blast furnace gas is used Enter the upper packing layer of the regeneration tower (1) for desorption and regeneration. The desorbed semi-lean liquid enters the reboiler (3) from the middle section of the regeneration tower (1) and is heated to 110°C. The heat source of the reboiler (3) is low-pressure steam. , The condensate outlet of the reboiler (3) is divided into two routes, one goes to the condensate tank in the plant area, and the other provides a heat source for the gasifier (17). The lean liquid after heating and regeneration flows from the bottom of the regeneration tower (1) to the absorption At the upper end of the tower, the absorption solvent is recycled;所述再生塔(1)顶部的CO 2气体经除沫器(2)进入降温塔(4)降温，降温塔(4)分为上下两段，下段冷源采用厂区循环冷却水，CO 2气体冷却到40℃后进入降温塔(4)上段，下段冷源采用液氨，CO 2气体冷却到5℃后进入二氧化碳压缩机(9)； The regeneration tower (1) CO 2 gas through the top of the demister (2) into the cooling tower (4) cooling, cooling tower (4) is divided into two sections, the lower section of the cold source is the cooling water circulating plant, gas CO.'S 2 After cooling to 40°C, it enters the upper section of the cooling tower (4), the lower section uses liquid ammonia as the cold source, and the CO 2 gas is cooled to 5°C and enters the carbon dioxide compressor (9);气态CO 2经二氧化碳压缩机(9)升压至3Mpa后分为两路，一路气体CO 2进入缓冲罐(10)，缓冲罐(10)出来的CO 2气体通往阀站(11)，经阀站(11)调节流量与压力后，通往转炉(12)底部，用于炼钢底吹，另一路气体CO 2去往液化器(14)，经液化器(14)液化后去增压泵(16)； After the gaseous CO 2 is boosted to 3Mpa by the carbon dioxide compressor (9), it is divided into two paths. One way gas CO 2 enters the buffer tank (10), and the CO 2 gas from the buffer tank (10) leads to the valve station (11). After the valve station (11) adjusts the flow and pressure, it leads to the bottom of the converter (12) for bottom blowing in steelmaking. The other gas CO 2 goes to the liquefier (14), which is liquefied by the liquefier (14) and depressurized Pump (16);增压泵(16)出口分为两路，一路去往液体CO 2槽车，用于销售液体CO 2产品，另一路与气化器(17)液体CO 2入口连通，气化后的气体CO 2去往缓冲罐(10)，用于钢材吹炼气调峰。 The outlet of the booster pump (16) is divided into two paths, one goes to the liquid CO 2 tanker, which is used to sell liquid CO 2 products, and the other is connected to the liquid CO 2 inlet of the vaporizer (17), and the gasified gas CO 2 Go to the buffer tank (10) for peak shaving of steel blowing gas.
- 根据权利要求8所述的一种与钢厂集成的二氧化碳捕集利用系统的使用方法，其特征在于，氨压缩机(13)为氨冷器(5)和液化器(14)提供冷源。The method for using a carbon dioxide capture and utilization system integrated with a steel plant according to claim 8, wherein the ammonia compressor (13) provides a cold source for the ammonia cooler (5) and the liquefier (14).
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005097299A1 (en) * | 2004-03-15 | 2005-10-20 | Mitsubishi Heavy Industries, Ltd. | Apparatus and method for recovering co2 |
| CN101575653A (en) * | 2009-06-17 | 2009-11-11 | 北京大学 | Method and device for separating carbon dioxide to improve mass energy of blast furnace gas |
| CN106823754A (en) * | 2017-04-18 | 2017-06-13 | 长沙紫宸科技开发有限公司 | A kind of hydrate continuously traps CO in cement kiln flue gas2Change system |
| CN108211671A (en) * | 2018-03-15 | 2018-06-29 | 中国华能集团清洁能源技术研究院有限公司 | A kind of energy-saving carbon dioxide regeneration and compressibility and method |
| CN111530238A (en) * | 2020-05-28 | 2020-08-14 | 中国华能集团清洁能源技术研究院有限公司 | Carbon dioxide capturing and utilizing system integrated with steel mill and using method thereof |
-
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- 2020-10-15 WO PCT/CN2020/121181 patent/WO2021238023A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005097299A1 (en) * | 2004-03-15 | 2005-10-20 | Mitsubishi Heavy Industries, Ltd. | Apparatus and method for recovering co2 |
| CN101575653A (en) * | 2009-06-17 | 2009-11-11 | 北京大学 | Method and device for separating carbon dioxide to improve mass energy of blast furnace gas |
| CN106823754A (en) * | 2017-04-18 | 2017-06-13 | 长沙紫宸科技开发有限公司 | A kind of hydrate continuously traps CO in cement kiln flue gas2Change system |
| CN108211671A (en) * | 2018-03-15 | 2018-06-29 | 中国华能集团清洁能源技术研究院有限公司 | A kind of energy-saving carbon dioxide regeneration and compressibility and method |
| CN111530238A (en) * | 2020-05-28 | 2020-08-14 | 中国华能集团清洁能源技术研究院有限公司 | Carbon dioxide capturing and utilizing system integrated with steel mill and using method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114275784A (en) * | 2021-12-24 | 2022-04-05 | 上海大学 | By using CO2System and method for preparing CO gas |
| CN114275784B (en) * | 2021-12-24 | 2023-05-19 | 上海大学 | CO utilization 2 System and method for preparing CO gas |
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