CN206843385U - A kind of gasification system using supercritical carbon dioxide as gasifying agent - Google Patents
A kind of gasification system using supercritical carbon dioxide as gasifying agent Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 200
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 100
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 100
- 238000002309 gasification Methods 0.000 title claims abstract description 74
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 25
- 239000003245 coal Substances 0.000 claims abstract description 54
- 230000009919 sequestration Effects 0.000 claims abstract description 6
- 238000010791 quenching Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 85
- 238000000926 separation method Methods 0.000 claims description 24
- 238000000746 purification Methods 0.000 claims description 21
- 239000000428 dust Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 229910001868 water Inorganic materials 0.000 claims description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 239000003034 coal gas Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 239000002956 ash Substances 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract 2
- 238000010926 purge Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 239000003250 coal slurry Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- PPBAJDRXASKAGH-UHFFFAOYSA-N azane;urea Chemical compound N.NC(N)=O PPBAJDRXASKAGH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/54—Improvements relating to the production of bulk chemicals using solvents, e.g. supercritical solvents or ionic liquids
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Abstract
Description
技术领域technical field
本实用新型属于煤炭气化领域，涉及一种以超临界二氧化碳为气化剂的煤气化系统。The utility model belongs to the field of coal gasification and relates to a coal gasification system using supercritical carbon dioxide as a gasification agent.
背景技术Background technique
煤炭气化是指在气化炉内，煤在高温下与气化剂反应，生成煤气的过程。煤炭气化过程的基本条件是：气化炉、气化原料和气化剂。气化炉是煤炭气化的核心设备，气化剂为氧气或空气以及水蒸气等。煤气化工艺是煤化工、IGCC、煤炭间接液化等的基础，煤经过气化后制得合成气，有效成分为CO、H2和CH4，用于化工合成或者燃烧发电。现有的气化工艺大多为自热式气化，即气化过程中不需要外界供热，煤与水蒸气进行吸热反应所消耗的热量，是由煤与氧进行的放热反应所提供的，因此在煤气中有相当量的二氧化碳存在。尤其是对于水煤浆气化，由于水煤浆浓度通常低于65％,即35％以上为水，系统耗水量大，且在气化炉中水的气化需要吸收大量的热，为维持气化操作稳定运行，相当量的碳与氧气反应生成二氧化碳，放出热量。在后续的煤气净化过程中，二氧化碳被洗涤分离出来，目前这些二氧化碳在化肥企业可以部分得到利用，其它企业大多作为废气直接排放，不但增加了碳排放，而且还浪费了碳资源。Coal gasification refers to the process in which coal reacts with gasification agent at high temperature in the gasifier to generate coal gas. The basic conditions of the coal gasification process are: gasifier, gasification raw material and gasification agent. The gasifier is the core equipment of coal gasification, and the gasification agent is oxygen or air and water vapor. The coal gasification process is the basis of coal chemical industry, IGCC, coal indirect liquefaction, etc. After coal is gasified, synthesis gas is produced. The effective components are CO, H 2 and CH 4 , which are used for chemical synthesis or combustion for power generation. Most of the existing gasification processes are self-heating gasification, that is, the gasification process does not require external heat supply, and the heat consumed by the endothermic reaction of coal and water vapor is provided by the exothermic reaction of coal and oxygen. Therefore, there is a considerable amount of carbon dioxide in the gas. Especially for coal-water slurry gasification, since the concentration of coal-water slurry is usually lower than 65%, that is, more than 35% is water, the system consumes a lot of water, and the gasification of water in the gasifier needs to absorb a large amount of heat. In order to maintain The gasification operation runs stably, and a considerable amount of carbon reacts with oxygen to form carbon dioxide and release heat. In the subsequent gas purification process, carbon dioxide is washed and separated. At present, some of these carbon dioxide can be used in fertilizer enterprises, and most of other enterprises are directly discharged as waste gas, which not only increases carbon emissions, but also wastes carbon resources.
二氧化碳在高温下可以与碳反应，因此可以作为气化剂用于煤气化，可将二氧化碳部分替代甚至全部替代水蒸气，既实现了二氧化碳的利用，又能够减少水的用量，同时实现节水，同时可以减少气化废水处理量。超临界二氧化碳有很好的换热能力，在煤气冷却的换热器中采用超临界二氧化碳作为冷流体，对煤气有很好的冷却效果。Carbon dioxide can react with carbon at high temperature, so it can be used as a gasification agent for coal gasification, and carbon dioxide can be partially replaced or even completely replaced by water vapor, which not only realizes the utilization of carbon dioxide, but also reduces the amount of water used, and realizes water saving At the same time, the amount of gasification wastewater treatment can be reduced. Supercritical carbon dioxide has a good heat exchange capacity, and supercritical carbon dioxide is used as the cold fluid in the gas-cooled heat exchanger, which has a good cooling effect on the gas.
因此，如果能够开发出一种新的煤气化系统，该系统可以以超临界二氧化碳为气化剂用于煤气化过程，则必然会对我国的传统的煤气化工艺，尤其是对于干旱缺水地区的煤气化工艺带来巨大影响。目前已公开的报道中，如中国专利CN 101381629 A公布了一种二氧化碳减排干粉煤气化炉，气化剂仍以水和氧气为主，二氧化碳作为补充气化剂，中国专利CN 103468320 A公布了一种二氧化碳煤浆的制备与气化系统，将液态的二氧化碳与煤混合制成煤浆，送入气化炉气化，但还未曾有将超临界二氧化碳作为气化剂用于煤炭气化的报道。Therefore, if a new coal gasification system can be developed, which can use supercritical carbon dioxide as a gasification agent for the coal gasification process, it will inevitably affect the traditional coal gasification process in our country, especially for arid and water-deficient areas. The coal gasification process has a huge impact. In the published reports, such as Chinese patent CN 101381629 A has announced a carbon dioxide emission reduction dry pulverized coal gasifier, the gasification agent is still mainly water and oxygen, carbon dioxide is used as a supplementary gasification agent, Chinese patent CN 103468320 A has announced A carbon dioxide coal slurry preparation and gasification system, which mixes liquid carbon dioxide and coal to make a coal slurry, and sends it to a gasifier for gasification. However, there has been no report on the use of supercritical carbon dioxide as a gasification agent for coal gasification .
实用新型内容Utility model content
本实用新型的目的在于克服上述现有技术的缺点，提供了一种以超临界二氧化碳为气化剂的煤气化系统，该系统能够将超临界二氧化碳作为气化剂用于煤炭气化。The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and provide a coal gasification system using supercritical carbon dioxide as a gasification agent. The system can use supercritical carbon dioxide as a gasification agent for coal gasification.
为达到上述目的，本实用新型所述的以超临界二氧化碳为气化剂的煤气化系统包括气化炉系统、煤气净化系统及二氧化碳封存及利用系统，其中，气化炉系统包括粉煤加压装置、烧嘴及气化炉，煤气净化系统包括煤气冷却器、气体净化系统、激冷气压缩机、二氧化碳分离系统、二氧化碳压缩机及激冷换热器；In order to achieve the above purpose, the coal gasification system using supercritical carbon dioxide as the gasification agent described in the utility model includes a gasification furnace system, a coal gas purification system, and a carbon dioxide storage and utilization system, wherein the gasification furnace system includes pulverized coal pressurization Device, burner and gasifier, gas purification system including gas cooler, gas purification system, chilled gas compressor, carbon dioxide separation system, carbon dioxide compressor and chilled heat exchanger;
粉煤加压装置的出口与烧嘴的粉煤入口相连通，烧嘴上设有氧气入口，烧嘴的出口与气化炉的原料入口相连通，气化炉的激冷气入口与激冷气压缩机的出口相连通，气化炉的气体出口与煤气冷却器的热流体入口相连通，煤气冷却器的热流体出口经气体净化系统与二氧化碳分离系统的入口相连通，二氧化碳分离系统的二氧化碳出口与二氧化碳压缩机的入口及二氧化碳封存及利用系统的入口相连通，二氧化碳压缩机的出口分为两路，其中，一路与粉煤加压装置的气体入口相连通，另一路依次经煤气冷却器的低温管路及激冷换热器的低温管路与烧嘴的超临界二氧化碳入口相连通。The outlet of the pulverized coal pressurizing device is connected with the pulverized coal inlet of the burner. The burner is provided with an oxygen inlet. The outlet of the burner is connected with the raw material inlet of the gasifier. The outlet of the gasifier is connected with the outlet of the gasifier, the gas outlet of the gasifier is connected with the hot fluid inlet of the gas cooler, the hot fluid outlet of the gas cooler is connected with the inlet of the carbon dioxide separation system through the gas purification system, and the carbon dioxide outlet of the carbon dioxide separation system is connected with the The inlet of the carbon dioxide compressor is connected with the inlet of the carbon dioxide storage and utilization system. The outlet of the carbon dioxide compressor is divided into two paths, one of which is connected with the gas inlet of the pulverized coal pressurization device, and the other path passes through the low-temperature gas cooler in turn. The pipeline and the low-temperature pipeline of the quenching heat exchanger are connected with the supercritical carbon dioxide inlet of the burner.
气体净化系统包括干法除尘器及湿法洗涤器，其中，煤气冷却器的热流体出口与干法除尘器的入口相连通，干法除尘器的出口与激冷气压缩机的入口及湿法洗涤器的入口相连通，湿法洗涤器的出口与激冷气压缩机的入口及二氧化碳分离系统的入口相连通。The gas purification system includes a dry dust collector and a wet scrubber, wherein the hot fluid outlet of the gas cooler is connected to the inlet of the dry dust collector, and the outlet of the dry dust collector is connected to the inlet of the chilled gas compressor and wet scrubber The inlet of the scrubber is connected, and the outlet of the wet scrubber is connected with the inlet of the chilled air compressor and the inlet of the carbon dioxide separation system.
煤气净化系统还包括煤气利用系统，二氧化碳分离系统的可燃组分出口与煤气利用系统的入口相连通。The gas purification system also includes a gas utilization system, the outlet of the combustible components of the carbon dioxide separation system is connected with the inlet of the gas utilization system.
气化炉的底部设有灰渣出口。The bottom of the gasifier is provided with an ash outlet.
干法除尘器的底部设有飞灰出口。There is a fly ash outlet at the bottom of the dry dust collector.
湿法洗涤器的底部设有酸泥水出口。The bottom of the wet scrubber is provided with an acid mud water outlet.
本实用新型具有以下有益效果：The utility model has the following beneficial effects:
本实用新型所述的以超临界二氧化碳为气化剂的煤气化系统在具体操作时，二氧化碳分离系统分离出来的二氧化碳经二氧化碳压缩机压缩后分为两路，其中一路经煤气冷却器及激冷换热器吸热后作为气化用超临界二氧化碳进入烧嘴中，再经烧嘴与粉煤及氧气一起喷入气化炉中，在气化炉中煤粉在氧气及气化用超临界二氧化碳的作用下发生气化反应，生成煤气，从而将超临界二氧化碳作为气化剂用于煤炭气化，实现二氧化碳利用的同时减少传统气化剂水蒸气的使用，降低气化废水的处理量，同时提高气化反应的速率，提高气化强度，大幅提高单位体积气化炉在单位时间的产气量。另外，超临界二氧化碳具有较好的换热效果，通过在煤气冷却器及激冷换热器中进行热量的交换，实现对高温煤气的冷却。During the specific operation of the coal gasification system using supercritical carbon dioxide as the gasification agent described in the utility model, the carbon dioxide separated by the carbon dioxide separation system is divided into two paths after being compressed by the carbon dioxide compressor, and one path is passed through the gas cooler and chilled After the heat exchanger absorbs heat, it enters the burner as supercritical carbon dioxide for gasification, and then sprays it into the gasifier together with pulverized coal and oxygen through the burner. Under the action of carbon dioxide, a gasification reaction occurs to generate coal gas, so that supercritical carbon dioxide is used as a gasification agent for coal gasification, realizing the utilization of carbon dioxide while reducing the use of traditional gasification agent water vapor, reducing the treatment capacity of gasification wastewater, At the same time, the gasification reaction rate is increased, the gasification intensity is increased, and the gas production per unit volume of the gasifier is greatly increased in unit time. In addition, supercritical carbon dioxide has a good heat exchange effect, and the high-temperature gas can be cooled by exchanging heat in the gas cooler and chilling heat exchanger.
附图说明Description of drawings
图1为本实用新型的结构示意图。Fig. 1 is the structural representation of the utility model.
其中，1为激冷气压缩机、2为粉煤加压装置、3为二氧化碳压缩机、4为烧嘴、5为气化炉、6为二氧化碳分离系统、7为激冷换热器、8为煤气冷却器、9为干法除尘器、10为二氧化碳封存及利用系统、11为湿法洗涤器、12为煤气利用系统。Among them, 1 is chilled gas compressor, 2 is pulverized coal pressurization device, 3 is carbon dioxide compressor, 4 is burner, 5 is gasifier, 6 is carbon dioxide separation system, 7 is chilled heat exchanger, 8 is Gas cooler, 9 is a dry dust collector, 10 is a carbon dioxide storage and utilization system, 11 is a wet scrubber, and 12 is a gas utilization system.
具体实施方式detailed description
下面结合附图对本实用新型做进一步详细描述：Below in conjunction with accompanying drawing, the utility model is described in further detail:
参考图1，本实用新型所述的以超临界二氧化碳为气化剂的煤气化系统包括气化炉系统、煤气净化系统及二氧化碳封存及利用系统10，其中，气化炉系统包括粉煤加压装置2、烧嘴4及气化炉5，煤气净化系统包括煤气冷却器8、气体净化系统、激冷气压缩机1、二氧化碳分离系统6、二氧化碳压缩机3及激冷换热器7；粉煤加压装置2的出口与烧嘴4的粉煤入口相连通，烧嘴4上设有氧气入口，烧嘴4的出口与气化炉5的原料入口相连通，气化炉5的激冷气入口与激冷气压缩机1的出口相连通，气化炉5的气体出口与煤气冷却器8的热流体入口相连通，煤气冷却器8的热流体出口经气体净化系统与二氧化碳分离系统6的入口相连通，二氧化碳分离系统6的二氧化碳出口与二氧化碳压缩机3的入口及二氧化碳封存及利用系统10的入口相连通，二氧化碳压缩机3的出口分为两路，其中，一路与粉煤加压装置2的气体入口相连通，另一路依次经煤气冷却器8的低温管路及激冷换热器7的低温管路与烧嘴4的超临界二氧化碳入口相连通。Referring to Fig. 1, the coal gasification system using supercritical carbon dioxide as the gasification agent described in the utility model includes a gasifier system, a coal gas purification system, and a carbon dioxide storage and utilization system 10, wherein the gasifier system includes a pulverized coal pressurized Device 2, burner 4 and gasifier 5, gas purification system includes gas cooler 8, gas purification system, chilled gas compressor 1, carbon dioxide separation system 6, carbon dioxide compressor 3 and chilled heat exchanger 7; pulverized coal The outlet of the pressurizing device 2 is connected with the pulverized coal inlet of the burner 4, and the oxygen inlet is provided on the burner 4, and the outlet of the burner 4 is connected with the raw material inlet of the gasifier 5, and the chilled gas inlet of the gasifier 5 is It is connected with the outlet of the chilled gas compressor 1, the gas outlet of the gasifier 5 is connected with the hot fluid inlet of the gas cooler 8, and the hot fluid outlet of the gas cooler 8 is connected with the inlet of the carbon dioxide separation system 6 through the gas purification system The carbon dioxide outlet of the carbon dioxide separation system 6 is connected with the inlet of the carbon dioxide compressor 3 and the inlet of the carbon dioxide sequestration and utilization system 10, and the outlet of the carbon dioxide compressor 3 is divided into two paths, wherein, one path is connected with the pulverized coal pressurization device 2 The gas inlet is connected, and the other path is connected with the supercritical carbon dioxide inlet of the burner 4 through the low-temperature pipeline of the gas cooler 8 and the low-temperature pipeline of the quenching heat exchanger 7 in sequence.
气体净化系统包括干法除尘器9及湿法洗涤器11，其中，煤气冷却器8的热流体出口与干法除尘器9的入口相连通，干法除尘器9的出口与激冷气压缩机1的入口及湿法洗涤器11的入口相连通，湿法洗涤器11的出口与激冷气压缩机1的入口及二氧化碳分离系统6的入口相连通；煤气净化系统还包括煤气利用系统12，二氧化碳分离系统6的可燃组分出口与煤气利用系统12的入口相连通。The gas purification system includes a dry dust collector 9 and a wet scrubber 11, wherein the hot fluid outlet of the gas cooler 8 is connected to the inlet of the dry dust collector 9, and the outlet of the dry dust collector 9 is connected to the chilled gas compressor 1 The inlet of the wet scrubber 11 is connected, and the outlet of the wet scrubber 11 is connected with the inlet of the chilled gas compressor 1 and the inlet of the carbon dioxide separation system 6; the gas purification system also includes a gas utilization system 12, and the carbon dioxide separation The combustible component outlet of the system 6 communicates with the inlet of the gas utilization system 12 .
气化炉5的底部设有灰渣出口；干法除尘器9的底部设有飞灰出口；湿法洗涤器11的底部设有酸泥水出口。The bottom of the gasifier 5 is provided with an ash outlet; the bottom of the dry dust collector 9 is provided with a fly ash outlet; the bottom of the wet scrubber 11 is provided with an acid mud water outlet.
本实用新型的具体操作过程为：The concrete operating process of the present utility model is:
1)二氧化碳压缩机3输出的二氧化碳分为两路，其中一路作为载气进入到粉煤加压装置2中，另一路依次经煤气冷却器8的低温管路及激冷换热器7的低温管路吸热后作为气化用超临界二氧化碳进入烧嘴4中，外界环境的氧气进入到烧嘴4中，粉煤在粉煤加压装置2中经载气加压后输送至烧嘴4中，然后经喷嘴与氧气及气化用超临界二氧化碳一起喷入气化炉5中，在气化炉5中粉煤在氧气及气化用超临界二氧化碳的作用下发生气化反应，生成煤气；1) The carbon dioxide output by the carbon dioxide compressor 3 is divided into two paths, one of which enters the pulverized coal pressurization device 2 as a carrier gas, and the other path passes through the low-temperature pipeline of the gas cooler 8 and the low-temperature pipeline of the chilling heat exchanger 7 in turn. After the pipeline absorbs heat, it enters the burner 4 as supercritical carbon dioxide for gasification, oxygen from the external environment enters the burner 4, and the pulverized coal is pressurized by the carrier gas in the pulverized coal pressurization device 2 and then transported to the burner 4 In the gasification furnace 5, the pulverized coal is gasified under the action of oxygen and supercritical carbon dioxide for gasification to generate coal gas. ;
2)激冷气压缩机1输出的激冷气进入到气化炉5中，在气化炉5中煤气与激冷气混合后温度降低，再与激冷换热器7低温管路中的二氧化碳进行换热，然后再从气化炉5中排出进入到煤气冷却器8中；2) The chilled gas output by the chilled gas compressor 1 enters the gasifier 5, and after the gas is mixed with the chilled gas in the gasifier 5, the temperature drops, and then exchanges with the carbon dioxide in the low-temperature pipeline of the chilled heat exchanger 7. heat, and then discharged from the gasifier 5 into the gas cooler 8;
3)煤气经过煤气冷却器8的冷却后进入到气体净化系统中，再经气体净化系统净化后进入到二氧化碳分离系统6中，二氧化碳分离系统6分离出的二氧化碳进入到二氧化碳压缩机3及二氧化碳封存及利用系统10中。3) The gas enters the gas purification system after being cooled by the gas cooler 8, and then enters the carbon dioxide separation system 6 after being purified by the gas purification system, and the carbon dioxide separated by the carbon dioxide separation system 6 enters the carbon dioxide compressor 3 and carbon dioxide sequestration And utilize system 10 in.
其中，煤气冷却器8输出的煤气进入到干法除尘器9中，并通过干法除尘器9捕集煤气中的飞灰，干法除尘器9输出的煤气分为两路，其中一路进入到激冷气压缩机1中，另一路进入到湿法洗涤器11中除去未被捕集的飞灰及分布杂质气体，湿法洗涤器11的输出煤气分为两路，其中一路进入到激冷气压缩机1中，另一路进入到二氧化碳分离系统6中，二氧化碳分离系统6分离出的可燃组分进入到煤气利用系统12中，二氧化碳分离系统6分离出的二氧化碳进入到二氧化碳压缩机3及二氧化碳封存及利用系统10中。Among them, the coal gas output by the gas cooler 8 enters the dry dust collector 9, and the fly ash in the gas is captured by the dry dust collector 9. The gas output by the dry dust collector 9 is divided into two paths, one of which enters the In the chilled gas compressor 1, the other path enters the wet scrubber 11 to remove uncaptured fly ash and distribute impurity gas. The output gas of the wet scrubber 11 is divided into two paths, one of which enters the chilled gas compressor In the machine 1, the other way enters the carbon dioxide separation system 6, the combustible components separated by the carbon dioxide separation system 6 enter the gas utilization system 12, the carbon dioxide separated by the carbon dioxide separation system 6 enters the carbon dioxide compressor 3 and the carbon dioxide sequestration and Use system 10.
所述的二氧化碳分离系统6采用低温甲醇洗工艺，煤气利用系统12是燃气轮机发电系统、合成氨系统或合成甲醇系统，所述的二氧化碳封存及利用系统10可以是合成氨制尿素系统。The carbon dioxide separation system 6 adopts a low-temperature methanol washing process, the gas utilization system 12 is a gas turbine power generation system, a synthetic ammonia system or a synthetic methanol system, and the carbon dioxide sequestration and utilization system 10 can be a synthetic ammonia urea system.
在实际使用时，可以通过烧嘴4的结构优化，粉煤、氧气与气化用超临界二氧化碳的配比优化，使得煤气化过程中碳转化率不断提高，气化强度不断提高，冷煤气效率效率也会不断提高。In actual use, through the optimization of the structure of the burner 4 and the optimization of the ratio of pulverized coal, oxygen and supercritical carbon dioxide for gasification, the carbon conversion rate during the coal gasification process is continuously improved, the gasification intensity is continuously improved, and the cold gas efficiency Efficiency will also continue to improve.
需要指出的是，上述实施例只为说明本实用新型的技术构思和特点，具体的实施方法，如二氧化碳分离系统6的类型，煤气利用系统12的类型，气化用超临界二氧化碳流经各换热器的顺序等等仍可进行修改和改进，但都不会由此而背离权利要求书中所规定的本实用新型的范围和基本精神。It should be pointed out that the above-mentioned embodiment is only to illustrate the technical concept and characteristics of the present utility model, and the specific implementation method, such as the type of the carbon dioxide separation system 6, the type of the gas utilization system 12, and the supercritical carbon dioxide used for gasification flowing through each exchange The order of the heaters, etc. can still be modified and improved, but all will not depart from the scope and basic spirit of the utility model specified in the claims.
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| CN110040518A (en) * | 2019-05-08 | 2019-07-23 | 宁夏神耀科技有限责任公司 | The system and its delivery method of supercritical carbon dioxide conveying solid substance raw material |
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| CN110040518A (en) * | 2019-05-08 | 2019-07-23 | 宁夏神耀科技有限责任公司 | The system and its delivery method of supercritical carbon dioxide conveying solid substance raw material |
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