CN215886933U - Zero carbon of rich CO tail gas/low carbon emission production carbon base compound's device - Google Patents

Zero carbon of rich CO tail gas/low carbon emission production carbon base compound's device Download PDF

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CN215886933U
CN215886933U CN202121512244.XU CN202121512244U CN215886933U CN 215886933 U CN215886933 U CN 215886933U CN 202121512244 U CN202121512244 U CN 202121512244U CN 215886933 U CN215886933 U CN 215886933U
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tail gas
carbon
rich tail
unit
rich
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王煊
贺鑫平
骆彩萍
余涛
熊超
张镇
吴艳
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Hualu Engineering and Technology Co Ltd
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Hualu Engineering and Technology Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency
    • Y02P20/133—Renewable energy sources, e.g. sunlight

Abstract

The utility model discloses a device for producing carbon-based compounds from CO-rich tail gas with zero carbon/low carbon emission, which comprises a renewable energy power generation device, a water electrolysis device, a CO-rich tail gas treatment device and a carbon-based compound synthesis device which are sequentially arranged; the water electrolysis device utilizes electricity provided by the renewable energy power generation device to electrolyze water to generate H2The water electrolysis device comprises a water electrolysis hydrogen production unit, a hydrogen purification unit and a hydrogen compression unit which are connected in sequence; what is needed isThe CO-rich tail gas treatment device comprises a CO-rich tail gas primary compression unit, a CO-rich tail gas purification unit, a CO-rich tail gas separation unit and a secondary compression unit which are sequentially connected; the carbon-based compound synthesis device is used for producing carbon-based compounds. By the device, the comprehensive utilization of the CO-rich gas of the industrial byproduct can be realized, and the economic benefit is improved; at the same time, CO in the whole process can be ensured2Low emission and even zero emission.

Description

Zero carbon of rich CO tail gas/low carbon emission production carbon base compound's device
Technical Field
The utility model belongs to the technical field of industrial tail gas utilization, and relates to a system for producing carbon-based compounds from CO-rich tail gas with zero carbon/low carbon emission.
Background
The CO-rich tail gas generally comes from coal chemical industry and ore smelting production. For example, a CO-rich tail gas is a byproduct in a device for synthesizing ethanol from coal-made synthesis gas by dimethyl ether, wherein the content of carbon monoxide is 60.0-65.0% (volume percentage), the content of hydrogen is 20.0-25.0% (volume percentage), and the balance is mainly nitrogen and the like; and for ore smelting production, generally, ores are used as raw materials, coke and the like are used as a carbon reducing agent and fuel, the reaction is carried out in a high-temperature ore smelting furnace, products meeting requirements are prepared, and CO-rich tail gas is a byproduct, most of the tail gas generated in the ore smelting process is reducing gas, and the tail gas mainly comprises carbon monoxide, hydrogen, carbon dioxide, oxygen, nitrogen and the like, wherein the carbon monoxide content is 50.0-95.0% (volume percentage), the hydrogen content is 1.0-15.0% (volume percentage), the carbon dioxide content is 2.0-15.0% (volume percentage), the oxygen content is generally 0.1-1.0% (volume percentage), and the balance is nitrogen and the like. Typical CO-rich tail gas represents CO-rich tail gas by-produced in the calcium carbide production process, CO-rich tail gas by-produced in the ferrosilicon production process, CO-rich tail gas by-produced in the silico-calcium alloy production process, CO-rich tail gas by-produced in the ferronickel production process, CO-rich tail gas by-produced in the silico-manganese alloy production process, CO-rich tail gas by-produced in the ferrochrome production process, and other CO-rich tail gases.
At present, the industry is directed to CO-rich tail gasThere are generally three routes used: the first is that the CO-rich tail gas is directly discharged to a torch and discharged to the atmosphere after combustion treatment, which not only causes waste of CO-rich tail gas resources, but also causes environmental pollution, and simultaneously, CO in the CO-rich tail gas is completely converted into CO2And (4) emissions, resulting in higher carbon emissions. The second is that the CO-rich tail gas is sent to a fuel gas power generation system for fuel gas power generation, the CO-rich tail gas is rich in CO, the direct combustion reduces the utilization value of the CO, and simultaneously, the CO in the CO-rich tail gas is completely converted into CO2And (4) emissions, resulting in higher carbon emissions. The third is the production of chemicals from CO-rich tail gas, such as methanol and other chemicals from CO-rich tail gas, but shift reaction is often involved in the production of chemicals from CO-rich tail gas, i.e. CO and H2Reaction of O to H2And CO2This process produces large amounts of CO2The national "double carbon target" is not met, i.e. carbon dioxide emissions peak by 2030 and strive to achieve carbon neutralization by 2060.
At present, the research on the industrial application of the CO-rich tail gas in China is relatively more on the CO-rich tail gas as a byproduct of the calcium carbide device. Patent CN103072945 gives typical CO-rich tail gas composition in calcium carbide production, wherein carbon monoxide ranges from 65% to 85% (volume percent), hydrogen ranges from 7% to 15% (volume percent), carbon dioxide ranges from 2% to 5% (volume percent), nitrogen + oxygen ranges from 5% to 12% (volume percent), methane content is less than or equal to 0.3% (volume percent), and the like. The CO-rich tail gas of carbide device byproduct is only one of a lot of CO-rich tail gases, and the CO scope is 50.0 ~ 95.0% (volume percent) in the CO-rich tail gas that this patent relates, not only contains the CO-rich tail gas of carbide device byproduct, also contains other types of CO-rich tail gas.
Patent CN106187684 reports a method for preparing methanol and dimethyl ether based on accuse temperature transform's carbide stove rich CO tail gas, and this utility model utilizes the rich CO tail gas of surplus carbide stove byproduct to react with vapor in accuse temperature transform reaction process, forms partial hydrogen, mixes with the hydrogen after the outside purification again and prepares firstAlcohol, the defect that the traditional method discharges the rich tail gas of the calcium carbide furnace after purification is avoided, although external hydrogen is introduced in the production process, the method still needs deep conversion of CO in the CO-rich tail gas by-product of the calcium carbide device, and a large amount of CO is generated in the deep conversion process2Cannot effectively avoid CO2Discharging of (3); meanwhile, the compressed CO-rich tail gas of the calcium carbide device byproduct does not contain water, and a large amount of water vapor needs to be supplemented so as to facilitate the CO-rich tail gas of the calcium carbide device byproduct to generate shift reaction, so that the production benefit is reduced, and the energy consumption is increased.
Hualuo engineering science and technology Limited liability company patent CN109592639 discloses a process for separating and purifying carbon monoxide and hydrogen from low-hydrogen low-sulfur high-carbon monoxide ore furnace tail gas, which comprises raw material gas pretreatment, raw material gas purification, raw material gas deoxidation, raw material gas conversion and hydrogenation, desulfurization and decarburization and CO/H2And (5) separating and purifying. The utility model discloses a low H has been solved under the condition that need not supply the extra-oral hydrogen2Poor deoxidation effect of low-S high-CO ore furnace tail gas, easy over-temperature transformation, easy reverse vulcanization of transformation catalyst and high energy consumption for desulfurization and decarburization of ore furnace tail gas. However, since the gas source only has a CO-rich tail gas, the process also inevitably requires a shift unit to produce some H2Resulting in CO production during CO-rich tail gas shift2Cannot effectively avoid CO2The problem of emissions.
In view of the above, research and development of a low-CO catalyst with reasonable economy, feasible process technology and low CO content is urgently needed2Emission of even zero CO2The device for producing the carbon-based compound by the discharged CO-rich tail gas can realize the comprehensive utilization of the CO-rich tail gas which is an industrial byproduct and improve the economic benefit; at the same time, CO in the whole process can be ensured2Low or even zero emissions, which is of great significance to achieve the "dual carbon goal," i.e., the peak is reached until 2030 years before the carbon dioxide emissions strive to achieve carbon neutralization before 2060 years.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for producing carbon-based compounds from CO-rich tail gas with zero carbon/low carbon emission, which is used for generating and electrolyzing CO in the CO-rich tail gas and renewable energy sourcesH produced by water hydrogen production device2Combined, making it suitable for downstream carbon-based compound production.
The device for producing the carbon-based compound from the CO-rich tail gas with zero carbon/low carbon emission is characterized by comprising a renewable energy power generation device, a water electrolysis device, a CO-rich tail gas treatment device and a carbon-based compound synthesis device which are sequentially arranged;
the renewable energy power generation device generates power by using renewable energy;
the water electrolysis device utilizes electricity provided by the renewable energy power generation device to electrolyze water to generate H2The water electrolysis device comprises a water electrolysis hydrogen production unit, a hydrogen purification unit and a hydrogen compression unit which are connected in sequence;
the CO-rich tail gas treatment device is used for compressing, purifying and separating CO-rich tail gas to meet the requirements of a carbon-based compound synthesis device on raw material gas, and comprises a CO-rich tail gas primary compression unit, a CO-rich tail gas purification unit, a CO-rich tail gas separation unit and a secondary compression unit which are sequentially connected;
the carbon-based compound synthesis device is used for producing carbon-based compounds.
Further, the CO-rich tail gas purification unit is connected with the secondary compression unit through the CO-rich tail gas separation unit.
Further, the CO-rich tail gas purification unit is connected with the secondary compression unit through a first bypass.
Further, the hydrogen compression unit is directly connected with the carbon-based compound synthesis device.
Further, a hydrogen compression unit is connected between the CO-rich tail gas separation unit and the secondary compression unit via a second bypass.
Furthermore, the hydrogen compression unit is connected with the second-stage compression unit after being connected with the first bypass through the second bypass.
Further, the CO-rich tail gas separation unit is directly connected with the carbon-based compound synthesis device through a third bypass.
Further, renewable energy power generation devices include, but are not limited to, solar, hydro, wind, biomass, wave, tidal, ocean thermal, geothermal, or other renewable energy power generation devices.
Further, the water electrolysis hydrogen production unit includes, but is not limited to, an alkaline electrolysis cell, a polymer membrane electrolysis cell, a solid oxide electrolysis cell or other water electrolysis hydrogen production units.
The utility model has the beneficial effects that the device for producing the carbon-based compound from the CO-rich tail gas with zero carbon/low carbon emission mainly solves the following problems:
(1) aiming at the high CO in the traditional CO-rich tail gas utilization2The discharge problem is solved, and the whole process device has low carbon and even zero carbon discharge.
(2) The traditional CO-rich tail gas has high CO concentration, so that the overtemperature of a shift converter is easy to occur in the CO shift process, the high-concentration CO shift reaction is effectively avoided, and the safety of the device is improved to the maximum extent.
(3) H required for carbon-based compounds2The hydrogen comes from green hydrogen instead of traditional grey hydrogen, namely the hydrogen comes from a water electrolysis device, the electricity needed by the water electrolysis device comes from a renewable energy power generation device, and zero carbon emission is generated in the hydrogen production process.
(4) The renewable energy power generation device can not only provide the required electricity for the water electrolysis hydrogen production device, but also provide electricity for the CO-rich tail gas treatment device and the carbon-based compound synthesis device, and external power supply is reduced to the maximum extent.
The device for producing the carbon-based compound from the CO-rich tail gas with zero carbon/low carbon emission can realize the comprehensive utilization of the CO-rich gas as an industrial byproduct and improve the economic benefit; at the same time, CO in the whole process can be ensured2Low emission and even zero emission.
Drawings
FIG. 1 is a schematic structural diagram of a system for producing carbon-based compounds from CO-rich tail gas with zero carbon/low carbon emission according to the present invention.
In the figure, 1, a CO-rich tail gas primary compression unit, 2, a CO-rich tail gas purification unit, 3, a CO-rich tail gas separation unit, 4, a first bypass, 5, a secondary compression unit, 6, a carbon-based compound synthesis device, 7, a renewable energy power generation device, 8, a water electrolysis hydrogen production unit, 9, a hydrogen purification unit, 10, a hydrogen compression unit, 11, a second bypass and 12, a third bypass are adopted.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples of the present invention without any inventive step, are within the scope of the present invention.
The utility model relates to a device for producing carbon-based compounds from CO-rich tail gas with zero carbon/low carbon emission, which comprises a renewable energy power generation device, a water electrolysis device, a CO-rich tail gas treatment device and a carbon-based compound synthesis device which are sequentially arranged as shown in figure 1.
Renewable energy power generation devices utilize renewable energy sources to generate power, and the renewable energy power generation devices include but are not limited to solar energy, hydroenergy, wind energy, biomass energy, wave energy, tidal energy, ocean temperature difference energy, geothermal energy and other renewable energy power generation devices.
The water electrolysis device utilizes electricity provided by the renewable energy power generation device to electrolyze water to generate H2. The water electrolysis device comprises a water electrolysis hydrogen production unit 8, a hydrogen purification unit 9 and a hydrogen compression unit 10 which are connected in sequence;
the water electrolysis hydrogen production unit 8 includes, but is not limited to, an alkaline electrolysis cell, a polymer membrane electrolysis cell, a solid oxide electrolysis cell, and other water electrolysis hydrogen production devices. Hydrogen production by Water Electrolysis Unit 82Can not meet the requirement of a carbon-based compound synthesis device on H under normal conditions2The carbon-based compound synthesis device 6 is directly sent to a hydrogen compression unit 10 after further purification is carried out by a hydrogen purification unit 9. The compressor outlet pressure of the hydrogen compression unit 10 is generally determined by the H required for the synthesis of carbon-based compounds2Pressure; in addition, according toCarbon-based compound pair CO and H in carbon-based compound synthesis device 62According to different requirements, the CO-rich tail gas can be mixed with the purified CO-rich tail gas through the second bypass 11 and is sent to the second-stage compression unit 5 without directly entering the carbon-based compound synthesis device 6. Production of H in addition to Electrolysis in Water Electrolysis Hydrogen production Unit 82While also generating a certain amount of O21Nm per production3H of (A) to (B)2Approximately 0.5Nm3O of (A) to (B)2，O2Then the product is sent to the outside or sold as a product.
The CO-rich tail gas treatment device is used for compressing, purifying and separating CO-rich tail gas, and meets the requirements of the carbon-based compound synthesis device on raw material gas. The CO-rich tail gas treatment device comprises a CO-rich tail gas primary compression unit 1, a CO-rich tail gas purification unit 2, a CO-rich tail gas separation unit 3, a first bypass 4, a secondary compression unit 5 and a third bypass 12 which are connected in sequence.
The CO-rich tail gas from the outside is compressed by the CO-rich tail gas first-stage compression unit 1 and then enters the CO-rich tail gas purification unit 2. The first-stage compression unit 1 for the CO-rich tail gas mainly compresses the CO-rich tail gas, and the outlet pressure of the compression unit depends on various factors, such as the pressure required by the CO-rich tail gas purification; the CO-rich tail gas purification unit 2 is mainly used for removing impurities carried in the CO-rich tail gas, such as chlorine, fluorine, oxygen, tar, naphthalene, benzene and the like, so as to meet the quality requirement of carbon-based compound synthesis on CO. The purified CO-rich tail gas enters a CO-rich tail gas separation unit 3 for further separating CO and a small amount of H2The common technical routes adopted by CO-rich tail gas separation include Pressure Swing Adsorption (PSA), membrane separation, cryogenic separation and the like; of course, the different carbon-based compounds are synthesized in the process of CO and H2The requirement is different, the CO-rich tail gas from the unit 2 can be directly fed into the second-stage compression unit 5 through the first bypass 4, and the CO-rich tail gas does not need to be fed into the CO-rich tail gas separation unit 3; the synthesis gas entering the second-stage compression unit 5 enters the carbon-based compound synthesis device 6 after being compressed, and the outlet pressure of the compression unit depends on the pressure required by the carbon-based compound synthesis device 6; of course, if the CO-rich tail gas first-stage compression unit 1 pressure and the hydrogen compression unit 10 outlet pressure can already satisfy the carbon-based compoundThe pressure required by the carbon-based compound synthesizing device 6 can enter the carbon-based compound synthesizing device 6 through a third bypass 12.
The carbon-based compound synthesis device is used for producing the carbon-based compound. The carbon-based compound is a compound which can pass through CO and H2Carbon and hydrogen containing compounds synthesized directly and/or indirectly by reaction include, but are not limited to, methane, methanol, ethanol, ethylene glycol, butanol, and the like.
As required in the methanol synthesis process, CO and H2The mixed gas of (2) and the mixed gas needs certain CO2If the downstream carbon-based compound product is methanol, the CO-rich tail gas from the CO-rich tail gas purification unit 2 can directly enter the second-stage compression unit 5 through the first bypass 4 without entering the CO-rich tail gas separation unit 3; also, the outlet H of the hydrogen compressing unit 102Directly through the second bypass 11 to be mixed with the CO-rich purified gas from the first bypass 4, and the mixed gas enters the carbon-based compound synthesis device 6 through the second-stage compression unit 5.
If carbon-based compound-methanol is produced, CO and H are required for methanol synthesis2The mixed gas of (2) and (2) needs to contain certain CO2By adopting the device for producing the carbon-based compound from the CO-rich tail gas with zero carbon/low carbon emission, zero carbon emission can be realized in the whole process. Producing the carbon-based compound-glycol.
If higher purity CO and higher purity H are required for the synthesis of ethylene glycol (indirect synthesis gas process)2By adopting the device for producing the carbon-based compound from the CO-rich tail gas with zero carbon/low carbon emission, the low carbon emission can be realized in the whole process (the carbon emission only contains the CO contained in the CO-rich tail gas per se)2)。

Claims (9)

1. A device for producing carbon-based compounds from CO-rich tail gas with zero carbon/low carbon emission is characterized by comprising a renewable energy power generation device, an electrolytic water device, a CO-rich tail gas treatment device and a carbon-based compound synthesis device (6);
the renewable energy power generation device generates power by using renewable energy;
the water electrolysis device utilizes electricity provided by the renewable energy power generation device to electrolyze water to generate H2The water electrolysis device comprises a water electrolysis hydrogen production unit (8), a hydrogen purification unit (9) and a hydrogen compression unit (10) which are connected in sequence;
the CO-rich tail gas treatment device is used for compressing, purifying and separating CO-rich tail gas to meet the requirements of a carbon-based compound synthesis device on raw material gas, and comprises a CO-rich tail gas primary compression unit (1), a CO-rich tail gas purification unit (2), a CO-rich tail gas separation unit (3) and a secondary compression unit (5) which are sequentially connected;
the carbon-based compound synthesis device (6) is used for producing carbon-based compounds.
2. The plant according to claim 1, characterized in that the CO-rich tail gas purification unit (2) is connected to the secondary compression unit (5) via a CO-rich tail gas separation unit (3).
3. The arrangement according to claim 1, characterized in that the CO-rich tail gas cleaning unit (2) is connected to the secondary compression unit (5) by a first bypass (4).
4. The apparatus according to claim 1, characterized in that the hydrogen compression unit (10) is directly connected to the carbon-based compound synthesis apparatus (6).
5. The plant according to claim 1, characterized in that the hydrogen compression unit (10) is connected between the CO-rich tail gas separation unit (3) and the secondary compression unit (5) via a second bypass (11).
6. The device according to claim 1, characterized in that the hydrogen compression unit (10) is connected to the second compression unit (5) after being connected to the first bypass (4) via the second bypass (11).
7. The plant according to claim 1, characterized in that the CO-rich tail gas separation unit (3) is directly connected to the carbon based compound synthesis plant (6) through a third bypass (12).
8. The device according to claim 1, characterized in that the renewable energy power generation device (7) comprises but is not limited to solar, hydro, wind, biomass, wave, tidal, ocean thermal, geothermal or other renewable energy power generation device.
9. The apparatus according to claim 1, wherein the water electrolysis hydrogen production unit (8) comprises but is not limited to an alkaline electrolysis cell, a polymer membrane electrolysis cell, a solid oxide electrolysis cell or other water electrolysis hydrogen production unit.
CN202121512244.XU 2021-07-05 2021-07-05 Zero carbon of rich CO tail gas/low carbon emission production carbon base compound's device Active CN215886933U (en)

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