CN111925837A - Converter gas purification treatment method - Google Patents
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- CN111925837A CN111925837A CN202010801776.9A CN202010801776A CN111925837A CN 111925837 A CN111925837 A CN 111925837A CN 202010801776 A CN202010801776 A CN 202010801776A CN 111925837 A CN111925837 A CN 111925837A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/02—Liquid carbonaceous fuels essentially based on components consisting of carbon, hydrogen, and oxygen only
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Abstract
The invention belongs to the technical field of converter gas treatment methods, and discloses a converter gas purification treatment method. Then, the oxygen and cyanide in the coal gas are removed by using the sulfurized molybdenum multi-element catalyst, so that the coal gas is fully purified, and the subsequent production is facilitated. The activity of the catalyst is kept by adding carbon disulfide, so that the reaction is more efficient, and the purification effect is improved. The treatment method has simple operation and good purification effect on the coal gas, and is beneficial to the biological fermentation of the converter coal gas to produce the ethanol.
Description
Technical Field
The invention belongs to the technical field of converter gas treatment methods, and particularly relates to a converter gas purification method.
Background
The total amount of energy resources in China is relatively rich, but the population base is too large, the per-capita energy resource possession is at a lower level in the world, and particularly the per-capita energy resource possession of petroleum and natural gas is only less than 10% of the average level in the world. With the steady and rapid development of national economy and the upgrading of urban and rural resident consumption structures, energy consumption will keep increasing trend continuously, and the contradiction of resource constraint is more prominent. Therefore, it is urgent to find and develop new energy sources for replacing crude oil as soon as possible, and the urgent need of energy source safety in China is provided. The fuel ethanol and the biodiesel can replace gasoline and diesel, and are accepted as the most promising alternative fuels. At present, various industrial tail gases discharged by domestic steel mills cause great pollution to the air quality. However, the main component of these tail gases is carbon monoxide, and can be used for combustion. If abundant industrial tail gas of a steel mill is used for producing the fuel ethanol, the emission of carbon dioxide can be reduced by 1.9 tons compared with direct combustion for producing each ton of the fuel ethanol. The utilization amount of fuel ethanol in China reaches 1000 ten thousand tons in 2020, and if the traditional process is adopted completely, 3000-4000 ten thousand mu of land planting raw materials are needed, which accounts for 1.64-2.19% of the area of cultivated land in China. Land resources have become a bottleneck for the development of the fuel ethanol industry.
The fuel ethanol is produced by taking the industrial tail gas of the steel mill as the raw material, so that the dependence of the raw material on land is thoroughly avoided, and the development requirement of 'no competition with people for grain and no competition with grain for land' is really realized, wherein the effective component of the industrial tail gas of the steel mill is CO, the volume content is about 53 percent, and the CO conversion rate of ethanol produced by a fermentation method is about 85 percent. The gas purification technology for producing ethanol by biological fermentation of converter gas mainly comprises deoxidation and hydrogen cyanide, and most of oxygen and cyanide harmful to fermentation organisms must be removed. Most of the existing treatment methods are complex, and the purification of coal gas is not thorough enough, so that the conversion rate is low in the process of producing ethanol, and the waste of resources is caused.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a converter gas purification treatment method capable of well removing oxygen and cyanide in gas.
The technical scheme adopted by the invention is as follows:
a converter gas purification treatment method comprises the following steps:
s1, removing impurities in coal gas by using activated carbon;
s2, removing oxygen and cyanide in the coal gas by using a sulfurized molybdenum multi-element catalyst.
Further, the molybdenum multi-element catalyst in a vulcanized state is an NSTO-1 sulfur-resistant deoxidizer.
In the process method for producing the ethanol by utilizing the biological fermentation of the converter gas, the gas needs to be purified, and most of oxygen and cyanide which is harmful to the fermentation organisms in the gas are removed. As the deoxidizer, there can be used an iron-manganese-based catalyst, a sulfidized multi-element molybdenum-based catalyst, and a noble metal catalyst, and the deoxidizer is specifically as follows:
the treatment method of the invention is divided into the following two parts:
firstly, considering that the gas may contain impurities such as tar, naphthalene, dust and the like which are harmful to the catalyst, arranging a protective tank at the front end, and adsorbing and removing the impurities by utilizing the strong adsorption capacity of the activated carbon so as to protect the rear-end catalyst;
secondly, oxygen and cyanide contained in the coal gas are removed, and the raw material gas has high CO content and contains H2The molybdenum-based multi-component catalyst in a sulfided state is selected. For example, the sulfur tolerant deoxidizer NSTO-1 manufactured by Hua Tuo science and technology Limited. The catalyst is used to make H2And O2Generating flameless reaction to remove O2. HCN is hydrolyzed to generate NH under the action of the catalyst3And CO, thereby. To ensure the activity of the catalyst, it is necessary to maintain the sulfided form of the catalyst, requiring a sulfur content in the gas of greater than 20 ppm. The invention adopts a mode of adding carbon disulfide to supplement sulfur. The main reaction formula is as follows:
①、H2+O2＝H2O
②、CS2+H2O＝CO2+H2S
③、CS2+H2＝H2S+CH4
④、HCN+H2O＝NH3+CO
further, step S2 is to supplement the sulfur by adding carbon disulfide during the reaction.
Furthermore, the sulfur content in the coal gas in the reaction process of the step S2 is more than 20 ppm.
Further, the above step S1 is performed in a protection tank.
Further, the step S1 includes the following steps:
(1.1) compressing the raw material coal gas to 0.5-0.8 MPa;
(1.2) removing impurities in the coal gas to obtain clean coal gas;
(1.3) introducing the prepared clean coal gas into a heat exchanger, and then introducing the clean coal gas into a heater to heat to 160 ℃ at 130 ℃ to obtain heated coal gas.
Further, the step S2 includes the following steps:
(2.1) introducing the heated coal gas into a reaction tower, removing oxygen and cyanide in the heated coal gas by using a sulfurized molybdenum-based multi-element catalyst, and adding carbon disulfide into the reaction tower by using a sulfur adding system in the removing process to ensure that the sulfur content in the reaction tower is more than 20ppm to obtain clean coal gas;
(2.2) introducing the prepared clean coal gas into a heat exchanger, so that the temperature of the clean coal gas is reduced to 70-90 ℃;
(2.3) introducing the clean coal gas into a water cooler, so that the temperature of the clean coal gas is reduced to 30-50 ℃;
and (2.4) carrying out precise filtration on the clean coal gas to obtain purified coal gas with the pressure of 0.4-0.7 MPa.
Furthermore, in the step (1.1), the raw material gas is compressed to 0.6 MPa; in the step (1.3), the clean coal gas is heated to 150 ℃.
Furthermore, in the step (2.2), the temperature of the clean coal gas is reduced to 80 ℃; in the step (2.3), the temperature of the clean coal gas is reduced to 40 ℃; in the step (2.4), the purified gas with the pressure of 0.5MPa is obtained.
The invention has the beneficial effects that:
the treatment method firstly utilizes the adsorption effect of the activated carbon to remove impurities such as tar, naphthalene, dust and the like in the raw material gas, and can play a role in protecting a subsequent catalyst while removing the impurities. Then, the oxygen and cyanide in the coal gas are removed by using the sulfide molybdenum multi-element catalyst, so that the coal gas is fully purified, and the subsequent production is facilitated. The activity of the catalyst is kept by adding carbon disulfide, so that the reaction is more efficient, and the purification effect is improved. The treatment method has simple operation and good purification effect on the coal gas, and is beneficial to the biological fermentation of the converter coal gas to produce the ethanol.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1:
as shown in fig. 1, the method for purifying converter gas of this embodiment includes the following steps:
s1, removing impurities in coal gas by using activated carbon;
s2, removing oxygen and cyanide in the coal gas by using a sulfurized molybdenum multi-element catalyst.
Example 2:
the present embodiment is limited to the above embodiment 1 by optimization, and as shown in fig. 1, the method for purifying converter gas of the present embodiment includes the following steps:
s1, removing impurities in coal gas by using activated carbon;
s2, removing oxygen and cyanide in the coal gas by using a sulfurized molybdenum multi-element catalyst.
Further, the molybdenum multi-element catalyst in a vulcanized state is an NSTO-1 sulfur-resistant deoxidizer.
In the process method for producing the ethanol by utilizing the biological fermentation of the converter gas, the gas needs to be purified, and most of oxygen and cyanide which is harmful to the fermentation organisms in the gas are removed. The treatment method of the invention is divided into the following two parts:
firstly, considering that the gas may contain impurities such as tar, naphthalene, dust and the like which are harmful to the catalyst, arranging a protective tank at the front end, and adsorbing and removing the impurities by utilizing the strong adsorption capacity of the activated carbon so as to protect the rear-end catalyst;
secondly, removing oxygen and cyanide contained in the gas, and selecting a molybdenum multicomponent catalyst in a sulfuration state aiming at the special condition that the raw material gas has high CO content and contains H2. For example, the sulfur-resistant deoxidizer NSTO-1 manufactured by Hua Tuo science and technology Limited. The catalyst enables H2 and O2 to have flameless reaction, and removes O2. HCN is hydrolyzed by the catalyst to NH3 and CO. To ensure the activity of the catalyst, it is necessary to maintain the sulfided form of the catalyst, requiring a sulfur content in the gas of greater than 20 ppm. The invention adopts a mode of adding carbon disulfide to supplement sulfur. The main reaction formula is as follows:
①、H2+O2＝H2O
②、CS2+H2O＝CO2+H2S
④、CS2+H2＝H2S+CH4
⑤、HCN+H2O＝NH3+CO
example 3:
the present embodiment is limited to the above embodiment 2 by optimization, and as shown in fig. 1, the method for purifying converter gas of the present embodiment includes the following steps:
s1, removing impurities in coal gas by using activated carbon;
s2, removing oxygen and cyanide in the coal gas by using a sulfurized molybdenum multi-element catalyst.
Further, the molybdenum multi-element catalyst in a vulcanized state is an NSTO-1 sulfur-resistant deoxidizer.
In the process method for producing the ethanol by utilizing the biological fermentation of the converter gas, the gas needs to be purified, and most of oxygen and cyanide which is harmful to the fermentation organisms in the gas are removed. The treatment method of the invention is divided into the following two parts:
firstly, considering that the gas may contain impurities such as tar, naphthalene, dust and the like which are harmful to the catalyst, arranging a protective tank at the front end, and adsorbing and removing the impurities by utilizing the strong adsorption capacity of the activated carbon so as to protect the rear-end catalyst;
secondly, removing oxygen and cyanide contained in the gas, and selecting a molybdenum multicomponent catalyst in a sulfuration state aiming at the special condition that the raw material gas has high CO content and contains H2. For example, the sulfur-resistant deoxidizer NSTO-1 manufactured by Hua Tuo science and technology Limited. The catalyst enables H2 and O2 to have flameless reaction, and removes O2. HCN is hydrolyzed by the catalyst to NH3 and CO. To ensure the activity of the catalyst, it is necessary to maintain the sulfided form of the catalyst, requiring a sulfur content in the gas of greater than 20 ppm. The invention adopts a mode of adding carbon disulfide to supplement sulfur. The main reaction formula is as follows:
①、H2+O2＝H2O
②、CS2+H2O＝CO2+H2S
③、CS2+H2＝H2S+CH4
HCN+H2O＝NH3+CO
the above step S2 replenishes sulfur by adding carbon disulfide during the reaction.
Example 4:
the present embodiment is limited to the above embodiment 3 by optimization, and as shown in fig. 1, the method for purifying converter gas of the present embodiment includes the following steps:
s1, removing impurities in coal gas by using activated carbon;
s2, removing oxygen and cyanide in the coal gas by using a sulfurized molybdenum multi-element catalyst.
Further, the molybdenum multi-element catalyst in a vulcanized state is an NSTO-1 sulfur-resistant deoxidizer.
In the process method for producing the ethanol by utilizing the biological fermentation of the converter gas, the gas needs to be purified, and most of oxygen and cyanide which is harmful to the fermentation organisms in the gas are removed. The treatment method of the invention is divided into the following two parts:
firstly, considering that the gas may contain impurities such as tar, naphthalene, dust and the like which are harmful to the catalyst, arranging a protective tank at the front end, and adsorbing and removing the impurities by utilizing the strong adsorption capacity of the activated carbon so as to protect the rear-end catalyst;
secondly, removing oxygen and cyanide contained in the gas, and selecting a molybdenum multicomponent catalyst in a sulfuration state aiming at the special condition that the raw material gas has high CO content and contains H2. For example, the sulfur-resistant deoxidizer NSTO-1 manufactured by Hua Tuo science and technology Limited. The catalyst enables H2 and O2 to have flameless reaction, and removes O2. HCN is hydrolyzed by the catalyst to NH3 and CO. To ensure the activity of the catalyst, it is necessary to maintain the sulfided form of the catalyst, requiring a sulfur content in the gas of greater than 20 ppm. The invention adopts a mode of adding carbon disulfide to supplement sulfur. The main reaction formula is as follows:
①、H2+O2＝H2O
②、CS2+H2O＝CO2+H2S
③、CS2+H2＝H2S+CH4
HCN+H2O＝NH3+CO
the above step S2 replenishes sulfur by adding carbon disulfide during the reaction. The sulfur content in the coal gas in the reaction process of the step S2 is more than 20 ppm.
Example 5:
the present embodiment is limited to the above embodiment 3 by optimization, and as shown in fig. 1, the method for purifying converter gas of the present embodiment includes the following steps:
s1, removing impurities in coal gas by using activated carbon;
s2, removing oxygen and cyanide in the coal gas by using a sulfurized molybdenum multi-element catalyst.
Further, the molybdenum multi-element catalyst in a vulcanized state is an NSTO-1 sulfur-resistant deoxidizer.
In the process method for producing the ethanol by utilizing the biological fermentation of the converter gas, the gas needs to be purified, and most of oxygen and cyanide which is harmful to the fermentation organisms in the gas are removed. The treatment method of the invention is divided into the following two parts:
firstly, considering that the gas may contain impurities such as tar, naphthalene, dust and the like which are harmful to the catalyst, arranging a protective tank at the front end, and adsorbing and removing the impurities by utilizing the strong adsorption capacity of the activated carbon so as to protect the rear-end catalyst;
secondly, removing oxygen and cyanide contained in the gas, and selecting a molybdenum multicomponent catalyst in a sulfuration state aiming at the special condition that the raw material gas has high CO content and contains H2. For example, the sulfur-resistant deoxidizer NSTO-1 manufactured by Hua Tuo science and technology Limited. The catalyst enables H2 and O2 to have flameless reaction, and removes O2. HCN is hydrolyzed by the catalyst to NH3 and CO. To ensure the activity of the catalyst, it is necessary to maintain the sulfided form of the catalyst, requiring a sulfur content in the gas of greater than 20 ppm. The invention adopts a mode of adding carbon disulfide to supplement sulfur. The main reaction formula is as follows:
①、H2+O2＝H2O
②、CS2+H2O＝CO2+H2S
③、CS2+H2＝H2S+CH4
HCN+H2O＝NH3+CO
the above step S2 replenishes sulfur by adding carbon disulfide during the reaction. The sulfur content in the coal gas in the reaction process of the step S2 is more than 20 ppm. The above step S1 is performed in the protection tank.
Example 6:
the present embodiment is limited to the above embodiment 5 by optimization, and as shown in fig. 1, the method for purifying converter gas of the present embodiment includes the following steps:
s1, removing impurities in coal gas by using activated carbon;
s2, removing oxygen and cyanide in the coal gas by using a sulfurized molybdenum multi-element catalyst.
Further, the molybdenum multi-element catalyst in a vulcanized state is an NSTO-1 sulfur-resistant deoxidizer.
In the process method for producing the ethanol by utilizing the biological fermentation of the converter gas, the gas needs to be purified, and most of oxygen and cyanide which is harmful to the fermentation organisms in the gas are removed. The treatment method of the invention is divided into the following two parts:
firstly, considering that the gas may contain impurities such as tar, naphthalene, dust and the like which are harmful to the catalyst, arranging a protective tank at the front end, and adsorbing and removing the impurities by utilizing the strong adsorption capacity of the activated carbon so as to protect the rear-end catalyst;
secondly, removing oxygen and cyanide contained in the gas, and selecting a molybdenum multicomponent catalyst in a sulfuration state aiming at the special condition that the raw material gas has high CO content and contains H2. For example, the sulfur-resistant deoxidizer NSTO-1 manufactured by Hua Tuo science and technology Limited. The catalyst enables H2 and O2 to have flameless reaction, and removes O2. HCN is hydrolyzed by the catalyst to NH3 and CO. To ensure the activity of the catalyst, it is necessary to maintain the sulfided form of the catalyst, requiring a sulfur content in the gas of greater than 20 ppm. The invention adopts a mode of adding carbon disulfide to supplement sulfur. The main reaction formula is as follows:
①、H2+O2＝H2O
②、CS2+H2O＝CO2+H2S
③、CS2+H2＝H2S+CH4
HCN+H2O＝NH3+CO
the above step S2 replenishes sulfur by adding carbon disulfide during the reaction. The sulfur content in the coal gas in the reaction process of the step S2 is more than 20 ppm. The above step S1 is performed in the protection tank.
The step S1 includes the following steps:
(1.1) compressing the raw material coal gas to 0.5-0.8 MPa;
(1.2) removing impurities in the coal gas to obtain clean coal gas;
(1.3) introducing the prepared clean coal gas into a heat exchanger, and then introducing the clean coal gas into a heater to heat to 160 ℃ at 130 ℃ to obtain heated coal gas.
The step S2 includes the following steps:
(2.1) introducing the heated coal gas into a reaction tower, removing oxygen and cyanide in the heated coal gas by using a sulfurized molybdenum-based multi-element catalyst, and adding carbon disulfide into the reaction tower by using a sulfur adding system in the removing process to ensure that the sulfur content in the reaction tower is more than 20ppm to obtain clean coal gas;
(2.2) introducing the prepared clean coal gas into a heat exchanger, so that the temperature of the clean coal gas is reduced to 70-90 ℃;
(2.3) introducing the clean coal gas into a water cooler, so that the temperature of the clean coal gas is reduced to 30-50 ℃;
and (2.4) carrying out precise filtration on the clean coal gas to obtain purified coal gas with the pressure of 0.4-0.7 MPa.
In the step (1.1), the raw material gas is compressed to 0.6 MPa; in the step (1.3), the clean coal gas is heated to 150 ℃. In the step (2.2), the temperature of the clean coal gas is reduced to 80 ℃; in the step (2.3), the temperature of the clean coal gas is reduced to 40 ℃; in the step (2.4), the purified gas with the pressure of 0.5MPa is obtained.
The invention is not limited to the above alternative embodiments, and any other various products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, all of which fall within the scope of the claims of the present invention, fall within the protection scope of the present invention.
Claims (9)
1. A converter gas purification treatment method is characterized by comprising the following steps: the method comprises the following steps:
s1, removing impurities in coal gas by using activated carbon;
s2, removing oxygen and cyanide in the coal gas by using a sulfurized molybdenum multi-element catalyst.
2. The converter gas purification treatment method according to claim 1, characterized in that: the sulfurized molybdenum multi-element catalyst is NSTO-1 sulfur-resistant deoxidizer.
3. The converter gas purification treatment method according to claim 1, characterized in that: the above step S2 replenishes sulfur by adding carbon disulfide during the reaction.
4. The converter gas purification treatment method according to claim 1, characterized in that: the sulfur content in the coal gas in the reaction process of the step S2 is more than 20 ppm.
5. The converter gas purification treatment method according to claim 1, characterized in that: the above step S1 is performed in the protection tank.
6. The converter gas purification treatment method according to claim 1, characterized in that: the step S1 includes the following steps:
(1.1) compressing the raw material coal gas to 0.5-0.8 MPa;
(1.2) removing impurities in the coal gas to obtain clean coal gas;
(1.3) introducing the prepared clean coal gas into a heat exchanger, and then introducing the clean coal gas into a heater to heat to 160 ℃ at 130 ℃ to obtain heated coal gas.
7. The converter gas purification treatment method according to claim 6, characterized in that: the step S2 includes the following steps:
(2.1) introducing the heated coal gas into a reaction tower, removing oxygen and cyanide in the heated coal gas by using a sulfurized molybdenum-based multi-element catalyst, and adding carbon disulfide into the reaction tower by using a sulfur adding system in the removing process to ensure that the sulfur content in the reaction tower is more than 20ppm to obtain clean coal gas;
(2.2) introducing the prepared clean coal gas into a heat exchanger, so that the temperature of the clean coal gas is reduced to 70-90 ℃;
(2.3) introducing the clean coal gas into a water cooler, so that the temperature of the clean coal gas is reduced to 30-50 ℃;
and (2.4) carrying out precise filtration on the clean coal gas to obtain purified coal gas with the pressure of 0.4-0.7 MPa.
8. The converter gas purification treatment method according to claim 6, characterized in that: in the step (1.1), the raw material gas is compressed to 0.6 MPa; in the step (1.3), the clean coal gas is heated to 150 ℃.
9. The converter gas purification treatment method according to claim 7, characterized in that: in the step (2.2), the temperature of the clean coal gas is reduced to 80 ℃; in the step (2.3), the temperature of the clean coal gas is reduced to 40 ℃; in the step (2.4), the purified gas with the pressure of 0.5MPa is obtained.
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| CN114367182A (en) * | 2022-01-17 | 2022-04-19 | 湖北禾谷环保有限公司 | Low-hydrogen low-pressure sulfur-resistant deoxidation process for tail gas of submerged arc furnace |
| CN115445385A (en) * | 2022-08-26 | 2022-12-09 | 北京首钢朗泽科技股份有限公司 | Industrial tail gas treatment system and method |
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| CN114367182A (en) * | 2022-01-17 | 2022-04-19 | 湖北禾谷环保有限公司 | Low-hydrogen low-pressure sulfur-resistant deoxidation process for tail gas of submerged arc furnace |
| CN114367182B (en) * | 2022-01-17 | 2022-10-04 | 湖北禾谷环保有限公司 | Low-hydrogen low-pressure sulfur-resistant deoxidation process for tail gas of submerged arc furnace |
| CN115445385A (en) * | 2022-08-26 | 2022-12-09 | 北京首钢朗泽科技股份有限公司 | Industrial tail gas treatment system and method |
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