CN204342750U - The structure of a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas - Google Patents
The structure of a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas Download PDFInfo
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- CN204342750U CN204342750U CN201420802042.2U CN201420802042U CN204342750U CN 204342750 U CN204342750 U CN 204342750U CN 201420802042 U CN201420802042 U CN 201420802042U CN 204342750 U CN204342750 U CN 204342750U
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Abstract
The structure of a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas, comprise standby coal unit, standby coal unit is connected with vapourizing furnace, the outlet of vapourizing furnace raw gas is connected with the first absorption tower entrance, first absorption tower outlet main line lead up to converter unit connect be connected with low-temperature rectisol unit, by-pass one tunnel is connected with power plant, and electric energy directly supplies water electrolysis hydrogen production unit, the circulating sewage outlet of vapourizing furnace is connected by second absorption tower and is connected with water electrolysis hydrogen production unit, be connected with methanation unit after the hydrogen outlet of water electrolysis hydrogen production unit and low-temperature rectisol unit outlet merging, the oxygen outlet of water electrolysis hydrogen production unit is connected with relevant device, this structure not only solves the demand of the required high-purity hydrogen of methanation catalyst reduction, the hydrogen make conversion section simultaneously adopting purity higher in preparing natural gas process regulates the hydrogen-carbon ratio in synthetic gas, alleviate the production load of conversion section in conventional coal process for producing natural, improve carbon utilisation rate.
Description
Technical field
The utility model belongs to Sweet natural gas technical field, particularly the structure of a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas.
Background technology
During existing coal preparing natural gas is produced, raw gas after gasification must regulate hydrogen-carbon ratio by conversion section, and this can make a large amount of monoxide conversion become carbonic acid gas, reduces the effective rate of utilization of carbon, too increase the load of downstream cryogenic methanol wash column unit simultaneously, cause the waste of the energy.
Coal process for producing natural technical process can produce a large amount of industrial sewages, unconfined discharge not only contaminate environment, and a large amount of wastes causing water resources; Also can produce a large amount of technique heat energy in production process, direct discharge is selected for reducing improvement expenses by many factories simultaneously; Moreover, coal preparing natural gas enterprise great majority are all in the renewable energy sources such as the wind energy such as Inner Mongol, Xinjiang, photovoltaic than more rich remote districts, and renewable energy power generation is not easy to realize grid-connected conveying, if the significant wastage that electricity more than this part can cause the energy can not be made full use of in process of production, run counter to the energy principles and policies of China's energy-saving and emission-reduction.
Ripe gradually along with electrolysis hydrogen producing process technology, by electricity and technique thermoelectricity water electrolysis hydrogen production more than power plant, greatly reduces process for making hydrogen cost, the more important thing is that hydrogen purity prepared by brine electrolysis is higher, can obtain the high-purity hydrogen of more than 99%.In recent years, along with the popularization of packaged process, water electrolysis hydrogen production plays an increasingly important role at technique hydrogen preparation field.Also water electrolysis hydrogen production is not applied to coal preparing natural gas at present to produce.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the purpose of this utility model is the structure providing a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas, has energy consumption low, easy to operate, the feature that catalyzed reaction efficiency is high.
To achieve these goals, the technical solution adopted in the utility model is:
The structure of a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas, comprise standby coal unit 1, the outlet of standby coal unit 1 is connected with the entrance of vapourizing furnace 2, the raw gas outlet of vapourizing furnace 2 upper end is connected with the first absorption tower 3 entrance, first absorption tower 3 outlet is divided into main line and by-pass two-way, main line one tunnel is connected with converter unit 5 entrance, and converter unit 5 outlet is connected with low-temperature rectisol unit 6 entrance; First absorption tower 3 exports by-pass one tunnel and is connected with power plant 7, and the electric energy produced by thermoelectricity, wind-powered electricity generation, photovoltaic by power plant 7 directly supplies water electrolysis hydrogen production unit 8; The lower end circulating sewage outlet of vapourizing furnace 2 is connected with second absorption tower 4 entrance, second absorption tower 4 outlet is connected with the entrance of water electrolysis hydrogen production unit 8, hydrogen outlet and the low-temperature rectisol unit 6 of water electrolysis hydrogen production unit 8 are connected with methanation unit 9 entrance after exporting and merging, and the oxygen outlet of water electrolysis hydrogen production unit 8 is connected with relevant device.
Described first absorption tower 3 adopts cooling condensation, physical absorption carries out dedusting and thick desulfurization to raw gas.
Described second absorption tower 4 adopts active carbon adsorption and coagulant sedimentation to carry out advanced treatment to circulating sewage.
Advantage of the present utility model: in coal preparing natural gas methanation, the introducing of water electrolysis hydrogen production unit 8, not only solve the demand of required high-purity hydrogen during methanation unit 9 catalyst reduction, the hydrogen make conversion section that simultaneously purity can be adopted in preparing natural gas process higher regulates the hydrogen-carbon ratio in synthetic gas, alleviate the production load of conversion section in conventional coal process for producing natural, effectively reduce the cost of investment of coal preparing natural gas, improve carbon utilisation rate.Can change flexible operating first absorption tower 3 according to working condition in process of production exports major-minor circuit uninterrupted simultaneously, and stable power supply, effectively improves capacity usage ratio.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail.
With reference to accompanying drawing, the structure of a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas, comprise standby coal unit 1, the outlet of standby coal unit 1 is connected with the entrance of vapourizing furnace 2, the raw gas outlet of vapourizing furnace 2 upper end is connected with the first absorption tower 3 entrance, first absorption tower 3 outlet is divided into main line and by-pass two-way, and main line one tunnel is connected with converter unit 5 entrance, and converter unit 5 outlet is connected with low-temperature rectisol unit 6 entrance; First absorption tower 3 exports by-pass one tunnel and is connected with power plant 7, and the electric energy produced by thermoelectricity, wind-powered electricity generation, photovoltaic by power plant 7 directly supplies water electrolysis hydrogen production unit 8; The lower end circulating sewage outlet of vapourizing furnace 2 is connected with second absorption tower 4 entrance, second absorption tower 4 outlet is connected with the entrance of water electrolysis hydrogen production unit, hydrogen outlet and the low-temperature rectisol unit 6 of water electrolysis hydrogen production unit 8 are connected with methanation unit 9 entrance after exporting and merging, and the oxygen outlet of water electrolysis hydrogen production unit 8 is connected with relevant device.
Described first absorption tower 3 adopts cooling condensation, physical absorption carries out dedusting and thick desulfurization to raw gas, and pitch, tar, middle oil, light oil, naphthalene, benzene, ammonia, hydrogen sulfide and various hydrocarbon compound in removing coal gas, obtain satisfactory raw material coal gas.
Described second absorption tower 4 adopts active carbon adsorption and coagulant sedimentation to carry out advanced treatment to circulating sewage, except the mud in decontaminated water, suspended substance and corrosives, obtain the water quality of load electrolysis requirement, extend work-ing life of electrolytic cell electrode, improve electrolytic efficiency and reduce the load of follow-up workshop section.
The process for making hydrogen of described structure, comprise the following steps: the pure oxygen that water electrolysis hydrogen production unit 8 richness is produced, purity reaches 99.5%-99.8%, fully mix with the overheated process steam of 300 DEG C-350 DEG C, its oxygen, steam enter into vapourizing furnace 2 together with providing the coal dust of coal unit 1 for oneself, oxidizing reaction is carried out, CH in the raw gas of generation under the pressure of 3.9MPa
4content 8-13%, CO content 12-18%, H
2content 35-45%, CO
2content 28-35% and a small amount of pitch, tar, H
2s, SO
2impurity, is processed by the first absorption tower 3, obtains satisfactory raw material coal gas; Close the first absorption tower 3 and export main line one tunnel, raw material coal gas exports by-pass one tunnel by the first absorption tower 3 and directly enters power plant 7 and supplement electric energy needed for water electrolysis hydrogen production unit 8 as fuel power generation function; The circulating sewage that vapourizing furnace 2 lower end produces is processed by second absorption tower 4, obtain satisfactory brine electrolysis, be incorporated to the heat energy power-generating that gasification workshop section produces simultaneously, adopt water electrolysis hydrogen production unit 8 water electrolysis hydrogen production, obtain the high-purity hydrogen of more than 99%, obtained the methanation catalyst of dispersed higher reduction-state by the reduction process of methanation unit 9.
The process for producing natural of described structure, comprise the following steps: the circulating sewage that vapourizing furnace 2 lower end produces is processed by second absorption tower 4, obtain satisfactory brine electrolysis water quality, prepare high-purity hydrogen by water electrolysis hydrogen production unit 8, electric energy major part needed for period water electrolysis hydrogen production unit 8 carrys out the thermoelectricity of the remaining electricity of power plant and thermoelectricity, wind-powered electricity generation, photovoltaic institute richness product; First from the pure oxygen that water electrolysis hydrogen production unit 8 richness is produced, purity reaches 99.5%-99.8%, fully mix with the overheated process steam of 300 DEG C-350 DEG C, its oxygen, steam enter into vapourizing furnace 2 together with providing the coal dust of coal unit 1 for oneself, oxidizing reaction is carried out, CH in the raw gas of generation under the pressure of 3.9MPa
4content 8-13%, CO content 12-16%, H
2content 35-40%, CO
2content 28-35% and a small amount of pitch, tar, H
2s, SO
2impurity, processed by the first absorption tower 3, obtain satisfactory raw material coal gas, open the first absorption tower 3 and export main line one tunnel, raw material coal gas carries out the preliminary adjustment of hydrogen-carbon ratio by converter unit 5, then removes sulfocompound, CO at-50 DEG C of low-temperature rectisol unit 6
2sour gas, the purified gas that low-temperature rectisol unit 6 exports mixes with the high-purity hydrogen that water electrolysis hydrogen production unit 8 exports, supplementary adjustment meets the hydrogen-carbon ratio 3.01-3.05 that methanation unit 9 reacts required, carries out methanation reaction, obtain satisfactory Sweet natural gas by methanation unit 9; Period produces load according to brine electrolysis process section, controls conversion section, reduces the production intensity of conversion section.
Claims (3)
1. the structure of an electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas, comprise standby coal unit (1), it is characterized in that: the outlet of standby coal unit (1) is connected with the entrance of vapourizing furnace (2), the raw gas outlet of vapourizing furnace (2) upper end is connected with the first absorption tower (3) entrance, first absorption tower (3) outlet is divided into main line and by-pass two-way, main line one tunnel is connected with converter unit (5) entrance, and converter unit (5) outlet is connected with low-temperature rectisol unit (6) entrance; Outlet by-pass one tunnel, first absorption tower (3) is connected with power plant (7), and the electric energy produced by thermoelectricity, wind-powered electricity generation, photovoltaic by power plant (7) directly supplies water electrolysis hydrogen production unit (8); The lower end circulating sewage outlet of vapourizing furnace (2) is connected with second absorption tower (4) entrance, second absorption tower (4) outlet is connected with the entrance of water electrolysis hydrogen production unit (8), be connected with methanation unit (9) entrance after the hydrogen outlet of water electrolysis hydrogen production unit (8) and low-temperature rectisol unit (6) outlet merging, the oxygen outlet of water electrolysis hydrogen production unit (8) is connected with relevant device.
2. the structure of a kind of electrolytic hydrogen production according to claim 1 and producing synthesis gas from coal preparing natural gas, is characterized in that: described first absorption tower (3) adopts cooling condensation, physical absorption carries out dedusting and thick desulfurization to raw gas.
3. the structure of a kind of electrolytic hydrogen production according to claim 1 and producing synthesis gas from coal preparing natural gas, is characterized in that: described second absorption tower (4) adopts active carbon adsorption and coagulant sedimentation to carry out advanced treatment to circulating sewage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420802042.2U CN204342750U (en) | 2014-12-16 | 2014-12-16 | The structure of a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas |
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| CN201420802042.2U CN204342750U (en) | 2014-12-16 | 2014-12-16 | The structure of a kind of electrolytic hydrogen production and producing synthesis gas from coal preparing natural gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531246A (en) * | 2014-12-16 | 2015-04-22 | 中国华能集团清洁能源技术研究院有限公司 | System for producing natural gas by electrolytic hydrogen production and gas synthesis from coal |
| GB2539021A (en) * | 2015-06-04 | 2016-12-07 | Advanced Plasma Power Ltd | Process for producing a substitute natural gas |
| CN110862838A (en) * | 2018-08-27 | 2020-03-06 | 襄阳中诚检测科技有限公司 | Chemical product providing system |
| CN111559956A (en) * | 2020-06-08 | 2020-08-21 | 甘肃华亭煤电股份有限公司煤制甲醇分公司 | Carbon dioxide conversion system in methanol preparation process from coal and working method thereof |
-
2014
- 2014-12-16 CN CN201420802042.2U patent/CN204342750U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531246A (en) * | 2014-12-16 | 2015-04-22 | 中国华能集团清洁能源技术研究院有限公司 | System for producing natural gas by electrolytic hydrogen production and gas synthesis from coal |
| GB2539021A (en) * | 2015-06-04 | 2016-12-07 | Advanced Plasma Power Ltd | Process for producing a substitute natural gas |
| CN110862838A (en) * | 2018-08-27 | 2020-03-06 | 襄阳中诚检测科技有限公司 | Chemical product providing system |
| CN111559956A (en) * | 2020-06-08 | 2020-08-21 | 甘肃华亭煤电股份有限公司煤制甲醇分公司 | Carbon dioxide conversion system in methanol preparation process from coal and working method thereof |
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