CN219885968U - Based on CO 2 Environment-friendly low-carbon salt chemical production system for resource utilization - Google Patents
Based on CO 2 Environment-friendly low-carbon salt chemical production system for resource utilization Download PDFInfo
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- CN219885968U CN219885968U CN202321027126.9U CN202321027126U CN219885968U CN 219885968 U CN219885968 U CN 219885968U CN 202321027126 U CN202321027126 U CN 202321027126U CN 219885968 U CN219885968 U CN 219885968U
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- carbon dioxide
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- olefin
- methanol
- hydrogen
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- 238000012824 chemical production Methods 0.000 title claims abstract description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 335
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 167
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 167
- 238000004519 manufacturing process Methods 0.000 claims abstract description 120
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 103
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 98
- 239000001257 hydrogen Substances 0.000 claims abstract description 94
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 94
- 150000001336 alkenes Chemical class 0.000 claims abstract description 89
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims abstract description 88
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 80
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000005977 Ethylene Substances 0.000 claims abstract description 72
- 150000003839 salts Chemical class 0.000 claims abstract description 59
- 238000010248 power generation Methods 0.000 claims abstract description 49
- 239000004743 Polypropylene Substances 0.000 claims abstract description 45
- -1 polypropylene Polymers 0.000 claims abstract description 45
- 229920001155 polypropylene Polymers 0.000 claims abstract description 45
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 37
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 37
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 27
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 291
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 120
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 69
- 239000004800 polyvinyl chloride Substances 0.000 claims description 57
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 54
- 238000002360 preparation method Methods 0.000 claims description 45
- 238000004523 catalytic cracking Methods 0.000 claims description 36
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 33
- 239000000460 chlorine Substances 0.000 claims description 33
- 229910052801 chlorine Inorganic materials 0.000 claims description 33
- 238000005984 hydrogenation reaction Methods 0.000 claims description 30
- 239000000047 product Substances 0.000 claims description 28
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 26
- 239000000243 solution Substances 0.000 claims description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 22
- 239000003546 flue gas Substances 0.000 claims description 22
- 238000004064 recycling Methods 0.000 claims description 16
- 150000002431 hydrogen Chemical class 0.000 claims description 15
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 13
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 239000013589 supplement Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 22
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 238000010168 coupling process Methods 0.000 abstract description 8
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 238000012412 chemical coupling Methods 0.000 abstract description 2
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 238000006386 neutralization reaction Methods 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 37
- 235000017550 sodium carbonate Nutrition 0.000 description 29
- 229910000029 sodium carbonate Inorganic materials 0.000 description 29
- 238000000034 method Methods 0.000 description 27
- 239000012528 membrane Substances 0.000 description 11
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 7
- 229910052808 lithium carbonate Inorganic materials 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 239000005997 Calcium carbide Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000009621 Solvay process Methods 0.000 description 1
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 229910052642 spodumene Inorganic materials 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The utility model disclosesCO-based is disclosed 2 A green low-carbon salt chemical production system for resource utilization belongs to the technical field of energy and chemical coupling, and comprises: a new energy power generation device, a salt water electrolysis device, a device for preparing olefin by a carbon dioxide capturing device and a device for preparing polypropylene; the new energy power generation device and the salt water electrolysis device are respectively connected with a new energy power generation power grid through cables; the olefin making device is connected with the carbon dioxide capturing device through a carbon dioxide first conveying line, and is connected with the saline solution electrolysis device through a hydrogen first conveying line; a propylene conveying line and an ethylene first conveying line are connected between the polypropylene production device and the olefin production device. The utility model can realize CO 2 Emission reduction and carbon neutralization are realized, the cyclic comprehensive utilization of materials and energy is realized, a green low-carbon energy consumption system and a production system are constructed, and the integration of chemical industry and energy coupling development and industry is realized.
Description
Technical Field
The utility model belongs to the technical field of energy and chemical coupling, and in particular relates to a coupling method based on CO 2 A green low-carbon salt chemical production system for resource utilization.
Background
The production methods of polyvinyl chloride (PVC) in the prior art are mainly two kinds: acetylene method and ethylene method. The method for producing PVC by using the calcium carbide acetylene method consumes a large amount of fresh water resources, and can produce calcium carbide slag and mercury catalyst pollution, and the high energy consumption and the large pollution are always important problems existing in the production of PVC by using the calcium carbide acetylene method. In addition, the PVC product prepared by adopting the ethylene method has less impurity content and obviously better quality than the calcium carbide acetylene method, so that the PVC product has more advantages in the fields of medical use, drinking water pipes and the like with strict requirements on impurity content and higher added value of the product.
The rapid development of photovoltaic and lithium batteries in new energy industries brings new increment of sodium carbonate requirements. Lithium carbonate is an essential material for the positive electrode of lithium ion batteries, and sodium carbonate is essential in the process of lithium carbonate. In the prior art, lithium carbonate is mainly extracted from ores taking spodumene as a raw material or from salt lake brine. Both extraction processes require about 2 units of soda ash to produce 1 unit of lithium carbonate. Most of traditional sodium carbonate production modes adopt synthesis routes of an ammonia-soda process and a combined soda process, the product quality is difficult to be greatly improved, and the requirements of two industries of photovoltaic and lithium batteries in new energy industries on the quality of high-quality sodium carbonate cannot be completely met.
On the other hand, CO 2 As a safe, readily available carbon oxide, its conversion to chemicals and fuels will directly reduce CO 2 And the consumption of fossil energy. But CO 2 Is a worldwide problem.
Therefore, the industrial production system is designed, the resource utilization of the carbon dioxide can be realized through the deep coupling of the new energy power and the chemical device, and the technical problem to be solved by the technicians in the technical field is urgent.
Disclosure of Invention
Aiming at the technical problems that in the prior art, the carbon dioxide emission reduction pressure is high, the technology and resource coupling development of multi-product across industries is difficult, the recycling and comprehensive utilization of materials and energy are difficult to realize, and a green low-carbon energy consumption system and a production system are difficult to construct, the utility model provides a method based on CO 2 The green low-carbon salt chemical production system for resource utilization at least solves the technical problems.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
based on CO 2 The green low-carbon salt chemical production system of resource utilization includes: new energy power generation device, salt water electrolysis device, carbon dioxide capturing device, olefin production device and olefin production deviceA polypropylene device;
the new energy power generation device generates power by using wind power, light energy and water power;
the salt water electrolysis device is used for electrolyzing salt water to prepare sodium hydroxide solution, chlorine and hydrogen by utilizing the electricity generated by the new energy power generation device;
the carbon dioxide capturing device captures and collects carbon dioxide from the flue gas containing carbon dioxide;
the olefin production device is used for producing olefin by taking carbon dioxide and hydrogen as raw materials and separating the olefin into propylene and ethylene;
the polypropylene production device polymerizes propylene and a part of ethylene to produce a polypropylene product;
the new energy power generation device and the salt water electrolysis device are respectively connected with a new energy power generation power grid through cables;
the olefin making device is connected with the carbon dioxide capturing device through a carbon dioxide first conveying line, and is connected with the saline solution electrolysis device through a hydrogen first conveying line;
a propylene conveying line and an ethylene first conveying line are connected between the polypropylene production device and the olefin production device.
Further, the olefin preparing device comprises a device for directly preparing olefin by carbon dioxide hydrogenation or a device for preparing methanol by carbon dioxide hydrogenation and a device for preparing olefin by catalytic cracking of methanol;
wherein the device for directly preparing olefin by carbon dioxide hydrogenation is used for directly preparing olefin by carbon dioxide hydrogenation, and simultaneously separating olefin into propylene and ethylene; the device for directly preparing olefin by hydrogenating carbon dioxide is connected with the carbon dioxide trapping device through a first carbon dioxide conveying line and is connected with the saline solution electrolysis device through a first hydrogen conveying line; a propylene conveying line and an ethylene first conveying line are connected between the device for directly preparing olefin by carbon dioxide hydrogenation and the device for preparing polypropylene;
the device for preparing methanol by carbon dioxide hydrogenation is used for producing methanol by carbon dioxide hydrogenation catalysis; the device for preparing olefin by catalytic cracking of methanol is used for preparing olefin by catalytic cracking of methanol, and simultaneously separating the olefin into ethylene and propylene; the device for preparing the methanol by hydrogenating the carbon dioxide is connected with the carbon dioxide trapping device through a first carbon dioxide conveying line, is connected with the saline solution electrolysis device through a first hydrogen conveying line, and is connected with the device for preparing the olefin by catalytic cracking the methanol through a methanol conveying line; a propylene conveying line and an ethylene first conveying line are connected between the polypropylene production device and the methanol catalytic cracking olefin production device.
Further, the device also comprises a polyvinyl chloride preparation device for producing a polyvinyl chloride product by chlorine and another part of ethylene; the polyvinyl chloride preparation device is connected with the saline solution electrolysis device through a chlorine gas conveying line;
the polyvinyl chloride preparation device is connected with the device for directly preparing olefin by hydrogenation of carbon dioxide through an ethylene second conveying line; or is connected with an olefin preparing device by catalytic cracking of methanol through an ethylene second conveying line.
Further, the sodium carbonate production device is used for absorbing the carbon dioxide by the sodium hydroxide solution to produce sodium carbonate or sodium bicarbonate products; the soda device is connected with the carbon dioxide capturing device through a carbon dioxide second conveying line; is connected with a salt water electrolysis device through a sodium hydroxide conveying line.
Further, the device also comprises an electrolytic water hydrogen production device, hydrogen is produced by utilizing the electric electrolytic water generated by the new energy power generation device, and the electrolytic water hydrogen production device is connected with a new energy power generation grid through a cable;
the electrolytic water hydrogen production device is connected with the methanol production device through a hydrogen second conveying line; or the electrolytic water hydrogen production device is connected with the device for directly producing olefin by hydrogenating carbon dioxide through the hydrogen second conveying line.
Further, the system also comprises a coal-fired power plant, wherein part of electric energy generated by the coal-fired power plant is green new energy, and the electric energy is supplemented and stabilized in frequency modulation when water or salt water is electrolyzed; the coal-fired power plant is connected with a new energy power generation grid through a cable.
Further, the carbon dioxide capturing device is connected with the coal-fired power plant through a flue gas conveying pipe.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model has scientific design and ingenious conception, realizes the recycling utilization of carbon dioxide through the deep coupling of new energy power and chemical equipment, and constructs a low-carbon green salt chemical circulating production system.
By adopting the production system, green electricity produced by new energy sources is sent to the water electrolysis hydrogen production device and the salt water electrolysis device to prepare green hydrogen, carbon dioxide of a thermal power plant is captured and recycled to produce methanol and high-quality sodium carbonate or baking soda in a recycling manner, an industrial chain is further extended, novel polymer materials of polypropylene and polyvinyl chloride are produced, and a low-carbon green salt chemical industry circulation production process and system are constructed, so that the production system has good economic and social benefits.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
FIG. 2 is a schematic diagram of example 1 of the present utility model with annual production of 30 ten thousand tons of polyvinyl chloride and 20 ten thousand tons of polypropylene products as balance basis, with annual operating time of 8000 hours.
FIG. 3 is a schematic view of another embodiment of the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1, the utility model provides a method based on CO 2 The green low-carbon salt chemical production system of resource utilization includes: the device comprises a new energy power generation device, a salt water electrolysis device, a carbon dioxide trapping device, a methanol preparation device, a methanol catalytic cracking olefin preparation device, a polypropylene preparation device, a polyvinyl chloride preparation device and a sodium carbonate production device;
the new energy power generation device and the salt water electrolysis device are respectively connected with a new energy power generation power grid through cables;
the methanol preparation device is connected with the carbon dioxide trapping device through a carbon dioxide first conveying line, is connected with the saline solution electrolysis device through a hydrogen first conveying line, and is connected with the methanol catalytic cracking olefin preparation device through a methanol conveying line;
a propylene conveying line and an ethylene first conveying line are connected between the polypropylene preparation device and the methanol catalytic cracking olefin preparation device;
the polyvinyl chloride preparing device is connected with the olefin preparing device by catalytic cracking of methanol through an ethylene second conveying line and is connected with the saline solution electrolysis device through a chlorine conveying line.
The soda device is connected with the carbon dioxide capturing device through a carbon dioxide second conveying line; is connected with a salt water electrolysis device through a sodium hydroxide conveying line.
When the novel energy power generation device is used, the novel energy power generation device generates power by using wind power, photovoltaic, photo-thermal and other novel energy sources, and the obtained power is sent to the salt water electrolysis device to electrolyze salt water to prepare sodium hydroxide solution, chlorine and hydrogen; wherein the hydrogen is sent to the methanol preparation device through a hydrogen first conveying line. The electrolysis of the salt water adopts an ionic membrane electrolysis method to produce sodium hydroxide solution, chlorine and hydrogen.
The carbon dioxide capturing device captures and collects carbon dioxide from the flue gas containing carbon dioxide; a part of the captured and collected carbon dioxide is sent to a methanol preparation device through a carbon dioxide first conveying line. Carbon dioxide is recovered from the flue gas by membrane separation, chemical solvent absorption or pressure swing adsorption.
In a methanol preparation device, the carbon dioxide is hydrogenated and catalyzed to produce methanol, and the obtained methanol is sent to a methanol catalytic cracking olefin preparation device through a methanol conveying line. The methanol production method of the utility model takes carbon dioxide as raw material, and is prepared by hydrogenation under the action of catalyst, and the prepared methanol is a liquid chemical hydrogen storage medium. The methanol catalytic cracking olefin producing device is used for preparing olefin by methanol catalytic cracking, and simultaneously separating the olefin into ethylene and propylene. The propylene is sent to the polypropylene making device through a propylene conveying line, and a part of ethylene is sent to the polypropylene making device through an ethylene first conveying line. The polypropylene production unit polymerizes propylene and a portion of ethylene to produce a polypropylene product.
Chlorine obtained by electrolysis of the salt water electrolysis device is sent to the polyvinyl chloride preparation device through a chlorine conveying line, and the other part of ethylene prepared by the olefin preparation device through catalytic cracking of methanol is sent to the polyvinyl chloride preparation device through an ethylene second conveying line. The PVC production device produces chlorine and another part of ethylene into PVC products. The method for producing polyvinyl chloride by adopting the utility model is that ethylene and chlorine are obtained by green energy, and the method for producing the polyvinyl chloride by adopting an ethylene method is a mercury-free green production process.
And conveying sodium hydroxide solution obtained by electrolysis of the salt water electrolysis device to the soda ash device through a sodium hydroxide conveying line, capturing the other part of carbon dioxide collected by the carbon dioxide capturing device, and conveying the other part of carbon dioxide to the soda ash device through a carbon dioxide second conveying line. The sodium hydroxide device absorbs the carbon dioxide from the sodium hydroxide solution to produce sodium carbonate or sodium bicarbonate products.
Example 2
As shown in fig. 1, the utility model provides a method based on CO 2 The green low-carbon salt chemical production system of resource utilization includes: the device comprises a new energy power generation device, an electrolytic water hydrogen production device, a saline solution electrolysis device, a carbon dioxide trapping device, a methanol production device, a methanol catalytic cracking olefin production device, a polypropylene production device, a polyvinyl chloride production device and a sodium carbonate production device;
the new energy power generation device, the saline solution electrolysis device and the water electrolysis hydrogen production device are respectively connected with a new energy power generation power grid through cables;
the methanol preparation device is connected with the carbon dioxide trapping device through a carbon dioxide first conveying line, is connected with the saline solution electrolysis device through a hydrogen first conveying line, is connected with the electrolyzed water hydrogen production device through a hydrogen second conveying line, and is connected with the methanol catalytic cracking olefin preparation device through a methanol conveying line;
a propylene conveying line and an ethylene first conveying line are connected between the polypropylene preparation device and the methanol catalytic cracking olefin preparation device;
the polyvinyl chloride preparing device is connected with the olefin preparing device by catalytic cracking of methanol through an ethylene second conveying line and is connected with the saline solution electrolysis device through a chlorine conveying line.
The soda device is connected with the carbon dioxide capturing device through a carbon dioxide second conveying line; is connected with a salt water electrolysis device through a sodium hydroxide conveying line.
When the novel energy power generation device is used, the novel energy power generation device generates power by using novel energy sources such as wind power, photovoltaic, photo-thermal and the like, and the obtained power is sent to the water electrolysis hydrogen production device and the salt water electrolysis device. The hydrogen production device by using the electrolyzed water generated by the new energy power generation device is used for producing hydrogen, and the obtained hydrogen is sent to the methanol production device through a hydrogen second conveying line. The salt water electrolysis device is used for electrolyzing salt water by utilizing electricity generated by the new energy power generation device to prepare sodium hydroxide solution, chlorine and hydrogen; the obtained hydrogen is sent to a methanol preparation device through a hydrogen first conveying line. The electrolysis of the salt water adopts an ionic membrane electrolysis method to produce sodium hydroxide solution, chlorine and hydrogen.
The carbon dioxide capturing device captures and collects carbon dioxide from the flue gas containing carbon dioxide; a part of the captured and collected carbon dioxide is sent to a methanol preparation device through a carbon dioxide first conveying line. Carbon dioxide is recovered from the flue gas by membrane separation, chemical solvent absorption or pressure swing adsorption.
In a methanol preparation device, the carbon dioxide is hydrogenated and catalyzed to produce methanol, and the obtained methanol is sent to a methanol catalytic cracking olefin preparation device through a methanol conveying line. The methanol production method of the utility model takes carbon dioxide as raw material, and is prepared by hydrogenation under the action of catalyst, and the prepared methanol is a liquid chemical hydrogen storage medium.
The methanol catalytic cracking olefin producing device is used for preparing olefin by methanol catalytic cracking, and simultaneously separating the olefin into ethylene and propylene. The propylene is sent to the polypropylene making device through a propylene conveying line, and a part of ethylene is sent to the polypropylene making device through an ethylene first conveying line. The polypropylene production unit polymerizes propylene and a portion of ethylene to produce a polypropylene product.
Chlorine obtained by electrolysis of the salt water electrolysis device is sent to the polyvinyl chloride preparation device through a chlorine conveying line, and the other part of ethylene prepared by the olefin preparation device through catalytic cracking of methanol is sent to the polyvinyl chloride preparation device through an ethylene second conveying line. The PVC production device produces chlorine and another part of ethylene into PVC products. The method for producing polyvinyl chloride by adopting the utility model is that ethylene and chlorine are obtained by green energy, and the method for producing the polyvinyl chloride by adopting an ethylene method is a mercury-free green production process.
And conveying sodium hydroxide solution obtained by electrolysis of the salt water electrolysis device to the soda ash device through a sodium hydroxide conveying line, capturing the other part of carbon dioxide collected by the carbon dioxide capturing device, and conveying the other part of carbon dioxide to the soda ash device through a carbon dioxide second conveying line. The sodium hydroxide device absorbs the carbon dioxide from the sodium hydroxide solution to produce sodium carbonate or sodium bicarbonate products. This embodiment 2 gives a more preferable system configuration based on embodiment 1, specifically: the device also comprises an electrolytic water hydrogen production device which utilizes the electric electrolytic water generated by the new energy power generation device to produce hydrogen and sends the hydrogen to the methanol production device for producing methanol. The hydrogen production device for electrolyzing water adopts an alkaline water electrolysis method, a proton exchange membrane electrolysis method (PEM) or a solid oxide electrolysis method (SOEC) to electrolyze water for producing hydrogen, and hydrogen supplementing is provided for the system.
Example 3
As shown in fig. 1, the utility model provides a method based on CO 2 The green low-carbon salt chemical production system of resource utilization includes: the system comprises a new energy power generation device, an electrolytic water hydrogen production device, a saline solution electrolysis device, a carbon dioxide trapping device, a methanol production device, a methanol catalytic cracking olefin production device, a polypropylene production device, a polyvinyl chloride production device, a soda production device and a coal-fired power plant.
The new energy power generation device, the saline solution electrolysis device and the water electrolysis hydrogen production device are respectively connected with a new energy power generation power grid through cables;
the coal-fired power plant is connected with a new energy power generation grid through a cable, and partial electric energy generated by the coal-fired power plant is green new energy generated by the new energy, and the electric power is supplemented and stabilized in frequency modulation when water or salt water is electrolyzed. The carbon dioxide trapping device is connected with the coal-fired power plant through a flue gas conveying pipe.
The methanol preparation device is connected with the carbon dioxide trapping device through a carbon dioxide first conveying line, is connected with the saline solution electrolysis device through a hydrogen first conveying line, is connected with the electrolyzed water hydrogen production device through a hydrogen second conveying line, and is connected with the methanol catalytic cracking olefin preparation device through a methanol conveying line;
a propylene conveying line and an ethylene first conveying line are connected between the polypropylene preparation device and the methanol catalytic cracking olefin preparation device;
the polyvinyl chloride preparing device is connected with the olefin preparing device by catalytic cracking of methanol through an ethylene second conveying line and is connected with the saline solution electrolysis device through a chlorine conveying line.
The soda device is connected with the carbon dioxide capturing device through a carbon dioxide second conveying line; is connected with a salt water electrolysis device through a sodium hydroxide conveying line.
When the novel energy power generation device is used, the novel energy power generation device generates power by using novel energy sources such as wind power, photovoltaic, photo-thermal and the like, and the obtained power is sent to the water electrolysis hydrogen production device and the salt water electrolysis device. The part of electric energy generated by the coal-fired power plant is green new energy, and the electric energy is supplemented and stabilized in frequency modulation when water or salt water is electrolyzed.
The hydrogen production device by using the electrolyzed water generated by the new energy power generation device is used for producing hydrogen, and the obtained hydrogen is sent to the methanol production device through a hydrogen second conveying line. The salt water electrolysis device is used for electrolyzing salt water by utilizing electricity generated by the new energy power generation device to prepare sodium hydroxide solution, chlorine and hydrogen; the obtained hydrogen is sent to a methanol preparation device through a hydrogen first conveying line.
The carbon dioxide capturing device captures and collects carbon dioxide from the flue gas containing carbon dioxide; a part of the captured and collected carbon dioxide is sent to a methanol preparation device through a carbon dioxide first conveying line. Carbon dioxide is recovered from the flue gas by membrane separation, chemical solvent absorption or pressure swing adsorption.
In a methanol preparation device, the carbon dioxide is hydrogenated and catalyzed to produce methanol, and the obtained methanol is sent to a methanol catalytic cracking olefin preparation device through a methanol conveying line. The methanol production method of the utility model takes carbon dioxide as raw material, and is prepared by hydrogenation under the action of catalyst, and the obtained methanol is a liquid chemical hydrogen storage medium.
The methanol catalytic cracking olefin producing device is used for preparing olefin by methanol catalytic cracking, and simultaneously separating the olefin into ethylene and propylene. The propylene is sent to the polypropylene making device through a propylene conveying line, and a part of ethylene is sent to the polypropylene making device through an ethylene first conveying line. The polypropylene production unit polymerizes propylene and a portion of ethylene to produce a polypropylene product.
Chlorine obtained by electrolysis of the salt water electrolysis device is sent to the polyvinyl chloride preparation device through a chlorine conveying line, and the other part of ethylene prepared by the olefin preparation device through catalytic cracking of methanol is sent to the polyvinyl chloride preparation device through an ethylene second conveying line. The PVC production device produces chlorine and another part of ethylene into PVC products. The method for producing polyvinyl chloride by adopting the utility model is that ethylene and chlorine are obtained by green energy, and the method for producing the polyvinyl chloride by adopting an ethylene method is a mercury-free green production process.
And conveying sodium hydroxide solution obtained by electrolysis of the salt water electrolysis device to the soda ash device through a sodium hydroxide conveying line, capturing the other part of carbon dioxide collected by the carbon dioxide capturing device, and conveying the other part of carbon dioxide to the soda ash device through a carbon dioxide second conveying line. The sodium hydroxide device absorbs the carbon dioxide from the sodium hydroxide solution to produce sodium carbonate or sodium bicarbonate products.
This embodiment 3 gives a more preferable system configuration based on embodiment 2, specifically: the system also comprises a coal-fired power plant, wherein part of electric energy generated by the coal-fired power plant is green new energy, and the electric energy is subjected to electric power supplement and frequency modulation stabilization when water or saline water is electrolyzed, and carbon dioxide-containing flue gas is provided.
Example 4
As shown in fig. 3, the utility model provides a method based on CO 2 A green low-carbon salt chemical production system for resource utilization; comprising the following steps: the device comprises a new energy power generation device, an electrolytic water hydrogen production device, a salt water electrolysis device, a carbon dioxide trapping device, a device for directly preparing olefin by carbon dioxide hydrogenation, a device for preparing polypropylene, a device for preparing polyvinyl chloride, a soda production device and a coal-fired power plant.
The new energy power generation device, the saline solution electrolysis device and the water electrolysis hydrogen production device are respectively connected with a new energy power generation power grid through cables;
the coal-fired power plant is connected with a new energy power generation grid through a cable, and partial electric energy generated by the coal-fired power plant is green new energy generated by the new energy, and the electric power is supplemented and stabilized in frequency modulation when water or salt water is electrolyzed. The carbon dioxide trapping device is connected with the coal-fired power plant through a flue gas conveying pipe.
The device for directly preparing olefin by hydrogenating carbon dioxide is connected with the carbon dioxide trapping device through a carbon dioxide first conveying line, is connected with the saline solution electrolysis device through a hydrogen first conveying line and is connected with the electrolyzed water hydrogen production device through a hydrogen second conveying line;
a propylene conveying line and an ethylene first conveying line are connected between the polypropylene production device and the carbon dioxide hydrogenation direct olefin production device;
the polyvinyl chloride making device is connected with the device for directly making olefin by hydrogenation of carbon dioxide through an ethylene second conveying line and is connected with the saline solution electrolysis device through a chlorine conveying line.
The soda device is connected with the carbon dioxide capturing device through a carbon dioxide second conveying line; is connected with a salt water electrolysis device through a sodium hydroxide conveying line.
When the novel energy power generation device is used, the novel energy power generation device generates power by using novel energy sources such as wind power, photovoltaic, photo-thermal and the like, and the obtained power is sent to the water electrolysis hydrogen production device and the salt water electrolysis device. The part of electric energy generated by the coal-fired power plant is green new energy, and the electric energy is supplemented and stabilized in frequency modulation when water or salt water is electrolyzed.
The hydrogen production device by using the electrolyzed water generated by the new energy power generation device is used for producing hydrogen, and the obtained hydrogen is sent to the device for directly producing olefin by hydrogenation of carbon dioxide through the hydrogen second conveying line. The salt water electrolysis device is used for electrolyzing salt water by utilizing electricity generated by the new energy power generation device to prepare sodium hydroxide solution, chlorine and hydrogen; the obtained hydrogen is sent to a device for directly preparing olefin by hydrogenation of carbon dioxide through a hydrogen first conveying line.
The carbon dioxide capturing device captures and collects carbon dioxide from the flue gas containing carbon dioxide; and part of the captured and collected carbon dioxide is sent to a device for directly preparing olefin by hydrogenating the carbon dioxide through a first carbon dioxide conveying line. Carbon dioxide is recovered from the flue gas by membrane separation, chemical solvent absorption or pressure swing adsorption.
In a device for directly preparing olefin by carbon dioxide hydrogenation, the olefin is directly produced by carbon dioxide hydrogenation through catalysis, and meanwhile, the olefin is separated into propylene and ethylene. The propylene is sent to the polypropylene making device through a propylene conveying line, and a part of ethylene is sent to the polypropylene making device through an ethylene first conveying line. The polypropylene production unit polymerizes propylene and a portion of ethylene to produce a polypropylene product.
Chlorine obtained by electrolysis of the salt water electrolysis device is sent to the polyvinyl chloride preparation device through a chlorine conveying line, and the other part of ethylene prepared by the olefin preparation device directly through carbon dioxide hydrogenation is sent to the polyvinyl chloride preparation device through an ethylene second conveying line. The PVC production device produces chlorine and another part of ethylene into PVC products. The method for producing polyvinyl chloride by adopting the utility model is that ethylene and chlorine are obtained by green energy, and the method for producing the polyvinyl chloride by adopting an ethylene method is a mercury-free green production process.
And conveying sodium hydroxide solution obtained by electrolysis of the salt water electrolysis device to the soda ash device through a sodium hydroxide conveying line, capturing the other part of carbon dioxide collected by the carbon dioxide capturing device, and conveying the other part of carbon dioxide to the soda ash device through a carbon dioxide second conveying line. The sodium hydroxide device absorbs the carbon dioxide from the sodium hydroxide solution to produce sodium carbonate or sodium bicarbonate products.
The technology of the present utility model will be described in detail below by way of examples. The technology of the utility model is explained in detail by taking 30 ten thousand tons of polyvinyl chloride (PVC) produced in one year and 20 ten thousand tons of polypropylene products as balance references and taking 8000 hours of annual operation time as an example.
Example 1
As shown in fig. 2, the new energy power generation device is used for producing green electricity by renewable energy sources such as solar energy, wind energy and the like, and the green electricity is sent to a downstream alkaline water electrolysis hydrogen production device and a salt water electrolysis device for producing hydrogen. Because the solar energy or the wind energy has instability, the electric energy is supplemented by the coupling thermal power plant to regulate the stable electric power, the reliable and stable electric power is provided for the production device, and the continuous production operation is maintained. The thermal power plant can also provide a source of carbon dioxide. The carbon dioxide required for producing the methanol is obtained by capturing flue gas of a thermal power plant, and is catalyzed and synthesized with hydrogen generated by an alkaline water electrolysis hydrogen production device and a salt water electrolysis device to obtain a methanol product, and the methanol is further used for preparing olefin (MTO); MTO separation to obtain ethylene and propylene, polymerization of propylene to produce new material polypropylene and production of polyvinyl chloride with chlorine produced by electrolysis of salt waterThe method comprises the steps of carrying out a first treatment on the surface of the Caustic soda solution produced by electrolysis of salt water absorbs the carbon dioxide collected and recovered by flue gas, and produces high-quality sodium carbonate (Na 2 CO 3 ) Or baking soda (NaHCO) 3 )。
The production of 30 ten thousand tons of polyvinyl chloride (PVC) and 20 ten thousand tons of polypropylene in a year is balanced in scale, the required chlorine gas is from a saline water electrolysis device, the scale is 20 ten thousand tons of caustic soda (100 percent NaOH) in a year, the MTO device is 34 ten thousand tons/year, the methanol scale is 90 ten thousand tons in a year, the consumed hydrogen gas is from a saline water electrolysis and water electrolysis hydrogen production device, and the water electrolysis hydrogen production scale is 244,000Nm 3 The byproduct hydrogen of the saline solution is 7230Nm3/hr; the methanol is produced by capturing and recycling 131 ten thousand tons of carbon dioxide per year; the produced caustic soda absorbs the flue gas carbon dioxide to prepare sodium carbonate with the scale of 26 ten thousand tons/year and consumes 15 ten thousand tons/year of carbon dioxide.
By adopting the utility model, about 146 ten thousand tons of carbon dioxide per year can be consumed in the thermal power plant, and the emission reduction effect is obvious. According to the carbon tax of 50 yuan/ton of carbon dioxide, the economic benefit of about 7300 ten thousand yuan/year can be obtained. And meanwhile, the high-purity caustic soda solution produced by utilizing the ion membrane electrolysis can absorb carbon dioxide, so that high-quality sodium carbonate or baking soda products can be prepared, the added value of the products is improved, and the method is more suitable for lithium carbonate, photovoltaic glass and medical-grade high-end users. The polyvinyl chloride material is further produced by adopting the ethylene obtained by separating chlorine from MTO from the electrolysis of the saline solution to polymerize, so that the problems of high energy consumption and environmental protection caused by the production of the calcium carbide method are avoided.
Example 2
This example is compared to example 1, except that the carbon dioxide is directly catalytically synthesized with hydrogen to olefins, all the other conditions being the same.
The high-quality sodium carbonate can be used in high-end markets such as lithium carbonate, photovoltaic glass, pharmaceutical grade and the like; the high-quality baking soda can also be used for users in pharmaceutical grade (oral administration, injection), electronic industry and the like. The methanol production method of the utility model takes carbon dioxide as raw material, and is prepared by hydrogenation under the action of catalyst, and the prepared methanol is a liquid chemical hydrogen storage medium. The PVC production method is that ethylene and chlorine gas are obtained from green energy, and the PVC is produced by ethylene method, which is a mercury-free green production process.
The utility model directly catalyzes the carbon dioxide hydrogenation gas to produce olefin, and has short process route and good economy.
According to the utility model, through the deep coupling of new energy power and chemical equipment, the recycling of carbon dioxide is realized, and a low-carbon green salt chemical circulating production system is constructed.
The caustic soda solution of the utility model absorbs carbon dioxide, directly absorbs low-concentration carbon dioxide in flue gas, and further reduces the cost of carbon dioxide capturing and recycling.
The utility model prepares green hydrogen by green electrolysis water and electrolysis salt water produced by new energy, captures and recovers carbon dioxide of a thermal power plant to produce methanol and high-quality sodium carbonate or baking soda in a recycling way, further extends an industrial chain to produce novel polymeric materials of polypropylene and polyvinyl chloride, constructs a low-carbon green salt chemical industry circulation production process and system, and has good economic benefit and social benefit.
The utility model prepares green hydrogen by green electrolysis water or electrolysis salt water produced by new energy, captures and recovers flue gas carbon dioxide, and carries out recycling to produce methanol and high-quality sodium carbonate or baking soda, further extends the industrial chain to produce novel polymeric materials of polypropylene and polyvinyl chloride, and constructs a low-carbon green salt chemical industry circulation production process and system.
The utility model adopts carbon dioxide discharged as a byproduct in the production process by taking coal as a raw material, in particular to a method for capturing carbon dioxide in flue gas of a coal-fired power plant by adopting a membrane separation method, a chemical solvent absorption method or a pressure swing adsorption method.
The high-quality sodium carbonate can be used in high-end markets such as lithium carbonate, photovoltaic glass, pharmaceutical grade and the like; the high-quality baking soda can also be used for users in pharmaceutical grade (oral administration, injection), electronic industry and the like. The methanol production method of the utility model takes carbon dioxide as raw material, and is prepared by hydrogenation under the action of catalyst, and the prepared methanol is a liquid chemical hydrogen storage medium. The PVC production method is that ethylene and chlorine gas are obtained from green energy, and the PVC is produced by ethylene method, which is a mercury-free green production process. The water electrolysis process of the present utility model may employ alkaline water electrolysis, proton exchange membrane electrolysis (PEM) or Solid Oxide (SOEC) electrolysis.
According to the utility model, through the deep coupling of new energy power and chemical equipment, the recycling of carbon dioxide is realized, and a low-carbon green salt chemical circulating production system is constructed.
The caustic soda solution of the utility model absorbs carbon dioxide, directly absorbs low-concentration carbon dioxide in flue gas, and further reduces the cost of carbon dioxide capturing and recycling. The utility model adopts ionic membrane electrolysis method to produce caustic soda, chlorine and hydrogen.
Finally, it should be noted that: the above embodiments are merely preferred embodiments of the present utility model to illustrate the technical solution of the present utility model, and are not limited thereto. All the changes or color-rendering which are made in the main design idea and spirit of the utility model and which are not significant are considered to be the same as the utility model, and all the technical problems which are solved are included in the protection scope of the utility model; in addition, the technical scheme of the utility model is directly or indirectly applied to other related technical fields, and the technical scheme is included in the scope of the utility model.
Claims (7)
1. Based on CO 2 The utility model provides a green low-carbon salt chemical production system of resource utilization which characterized in that includes: a new energy power generation device, a salt water electrolysis device, a carbon dioxide capturing device, an olefin production device and a polypropylene production device;
the new energy power generation device generates power by utilizing wind power and/or light energy and/or water power;
the salt water electrolysis device is used for electrolyzing salt water to prepare sodium hydroxide solution, chlorine and hydrogen by utilizing the electricity generated by the new energy power generation device;
the carbon dioxide capturing device captures and collects carbon dioxide from the flue gas containing carbon dioxide;
the olefin production device is used for producing olefin by taking carbon dioxide and hydrogen as raw materials and separating the olefin into propylene and ethylene;
the polypropylene production device polymerizes propylene and a part of ethylene to produce a polypropylene product;
the new energy power generation device and the salt water electrolysis device are respectively connected with a new energy power generation power grid through cables;
the olefin making device is connected with the carbon dioxide capturing device through a carbon dioxide first conveying line, and is connected with the saline solution electrolysis device through a hydrogen first conveying line;
a propylene conveying line and an ethylene first conveying line are connected between the polypropylene production device and the olefin production device.
2. The CO-based according to claim 1 2 The environment-friendly low-carbon salt chemical production system for recycling is characterized in that the olefin production device comprises a device for directly producing olefin by carbon dioxide hydrogenation or a device for producing methanol by carbon dioxide hydrogenation and a device for producing olefin by catalytic cracking of methanol;
wherein the device for directly preparing olefin by carbon dioxide hydrogenation is used for directly preparing olefin by carbon dioxide hydrogenation, and simultaneously separating olefin into propylene and ethylene; the device for directly preparing olefin by hydrogenating carbon dioxide is connected with the carbon dioxide trapping device through a first carbon dioxide conveying line and is connected with the saline solution electrolysis device through a first hydrogen conveying line; a propylene conveying line and an ethylene first conveying line are connected between the device for directly preparing olefin by carbon dioxide hydrogenation and the device for preparing polypropylene;
the device for preparing methanol by carbon dioxide hydrogenation is used for producing methanol by carbon dioxide hydrogenation catalysis; the device for preparing olefin by catalytic cracking of methanol is used for preparing olefin by catalytic cracking of methanol, and simultaneously separating the olefin into ethylene and propylene; the device for preparing the methanol by hydrogenating the carbon dioxide is connected with the carbon dioxide trapping device through a first carbon dioxide conveying line, is connected with the saline solution electrolysis device through a first hydrogen conveying line, and is connected with the device for preparing the olefin by catalytic cracking the methanol through a methanol conveying line; a propylene conveying line and an ethylene first conveying line are connected between the polypropylene production device and the methanol catalytic cracking olefin production device.
3. CO-based according to claim 2 2 The environment-friendly low-carbon salt chemical production system for recycling is characterized by also comprising a system for producing polyvinyl chloride products by using chlorine and another part of ethyleneA polyvinyl chloride production device; the polyvinyl chloride preparation device is connected with the saline solution electrolysis device through a chlorine gas conveying line;
the polyvinyl chloride preparation device is connected with the device for directly preparing olefin by hydrogenation of carbon dioxide through an ethylene second conveying line; or is connected with an olefin preparing device by catalytic cracking of methanol through an ethylene second conveying line.
4. The CO-based according to claim 1 2 The environment-friendly low-carbon salt chemical production system for recycling is characterized by further comprising a soda production device for absorbing carbon dioxide with sodium hydroxide solution to produce soda or baking soda products; the soda device is connected with the carbon dioxide capturing device through a carbon dioxide second conveying line; is connected with a salt water electrolysis device through a sodium hydroxide conveying line.
5. CO-based according to claim 2 2 The environment-friendly low-carbon salt chemical production system for recycling is characterized by further comprising an electrolytic water hydrogen production device, wherein the electrolytic water hydrogen production device is connected with a new energy power generation grid through a cable and is used for producing hydrogen by utilizing electric electrolytic water generated by the new energy power generation device;
the electrolytic water hydrogen production device is connected with the methanol production device through a hydrogen second conveying line; or the electrolytic water hydrogen production device is connected with the device for directly producing olefin by hydrogenating carbon dioxide through the hydrogen second conveying line.
6. CO-based according to claim 1 or 5 2 The environment-friendly low-carbon salt chemical production system for recycling is characterized by further comprising a coal-fired power plant, wherein part of electric energy generated by the coal-fired power plant is generated by green new energy, and electric power supplement and frequency modulation stabilization are performed when water or salt water is electrolyzed; the coal-fired power plant is connected with a new energy power generation grid through a cable.
7. The CO-based system of claim 6 2 The environment-friendly low-carbon salt chemical production system for recycling is characterized in that the carbon dioxide trapping device is connected with the coal-fired power plant through a flue gas conveying pipe.
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