CN115814563A - Blast furnace gas dry desulphurization adsorbent cyclic regeneration system and method - Google Patents
Blast furnace gas dry desulphurization adsorbent cyclic regeneration system and method Download PDFInfo
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- CN115814563A CN115814563A CN202211642620.6A CN202211642620A CN115814563A CN 115814563 A CN115814563 A CN 115814563A CN 202211642620 A CN202211642620 A CN 202211642620A CN 115814563 A CN115814563 A CN 115814563A
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Abstract
The invention discloses a circulating regeneration system and a method of a blast furnace gas dry desulphurization adsorbent, which effectively solve the treatment problem of gas analyzed by a microcrystal or molecular sieve blast furnace gas fine desulphurization process, ensure that the fine desulphurization adsorbent is recycled, prolong the adsorption life, reduce the replacement frequency and reduce the investment and the operation cost; the analytic gas adopts small-gas-volume nitrogen, so that the energy consumption is effectively reduced and the operation safety is improved.
Description
Technical Field
The invention relates to the field of steel blast furnace gas desulfurization, in particular to a blast furnace gas dry desulfurization adsorbent circulating regeneration system and a method.
Background
In the iron and steel industry, a large amount of blast furnace gas is produced in blast furnace ironmaking, and it is estimated that each ton of iron produced by smelting generally produces 1700-2200m 3 Of blast furnace gas, due to whichContaining CO and H 2 The combustible gas is generally used as fuel for downstream boilers, hot blast stoves, power plants, steel rolling hot blast stoves and other users, but the blast furnace gas also contains COS and CS 2 、H 2 S, etc. sulfur-containing compounds, which form SO after combustion 2 Harmful gases and no effective terminal pollution control equipment exist, and the concentration of the harmful gases often exceeds the current national emission standard. The blast furnace gas end users are scattered, the amount of flue gas is multiplied after combustion, the site is limited, and the like, so that the difficulty of end treatment is high, and the investment and operation cost is high. Therefore, the front-end fine desulfurization of the blast furnace gas is an effective way for solving the problem of standard emission at present. The existing blast furnace gas purification process can be mainly divided into two types: the first one is stepped fine desulfurizing process including the first step of eliminating COS and CS from blast furnace gas 2 The organic sulfur difficult to remove is converted into inorganic H easy to treat by catalyst hydrolysis 2 S, then H is removed by dry or wet method 2 S, finally realizing fine desulfurization of blast furnace gas; the second is integrated fine desulfurization, which directly uses the organic sulfur represented by COS and H through the absorbent such as microcrystal material or molecular sieve 2 Inorganic sulfur represented by S is directly absorbed and removed. The microcrystal or molecular sieve adsorption fine desulfurization process has a higher application prospect due to the advantages of simple process flow, small occupied area, no secondary pollution and the like, after the microcrystal or molecular sieve is adsorbed and saturated at present, the desulfurizer which is adsorbed and saturated is analyzed and adsorbed after the clean coal gas after fine desulfurization is heated by a steam heat exchanger, the cyclic regeneration of the desulfurizer is realized, the problem that the analyzed high-concentration sulfur-containing gas cannot be well treated is solved, most of available ways are sent to sintering ignition or gas boiler combustion, the practical process is limited by the field and users and cannot be realized, and the application of the integrated fine desulfurization process is severely restricted.
It is noted that the information disclosed in this background of the invention section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a circulating regeneration system and a circulating regeneration method of a blast furnace gas dry desulphurization adsorbent, which are used for solving the problem that the high-concentration sulfur-containing gas after analysis cannot be well treated in the prior art.
In order to solve the technical problems, the invention provides a blast furnace gas dry desulphurization adsorbent cyclic regeneration system, which comprises an adsorption tower, a multi-stage analysis gas treatment device, a nitrogen gas storage device and a heating device;
the adsorption tower is used for receiving the blast furnace gas, adsorbing high-concentration sulfides in the blast furnace gas and outputting the analyzed high-concentration sulfur-containing analysis gas to the multistage analysis gas treatment device;
the multi-stage analysis gas treatment device is used for carrying out multi-stage treatment on the blast furnace gas to remove acid gas, particles and sulfur-containing gas in the blast furnace gas, and outputting purified nitrogen to the nitrogen gas storage device for recycling;
the nitrogen gas storage device is used for storing nitrogen gas;
and the heating device heats and conveys the nitrogen in the nitrogen gas storage device into the adsorption tower.
Optionally, the multi-stage resolution gas treatment unit comprises a first stage deacidification tower for removing acid gases and particulates.
Optionally, the multistage desorption gas treatment device further comprises a device for converting organic sulfide into H under the action of a catalyst 2 S gas hydrolysis tower.
Optionally, the multistage stripping gas treatment plant further comprises a secondary deacidification column for removing sulfur-containing gas.
Optionally, a circulating fan is further disposed between the multistage analysis gas processing apparatus and the nitrogen gas storage apparatus, and is configured to output nitrogen gas to the nitrogen gas storage tank.
Optionally, the heating device is a steam heat exchanger.
Optionally, the nitrogen storage device is a nitrogen storage tank.
Optionally, the adsorption tower comprises an outlet for outputting clean gas to a gas pipe network.
Optionally, the nitrogen gas storage device comprises an outlet for outputting clean gas to a gas pipe network.
Based on the same invention concept, the invention also provides a blast furnace gas dry desulphurization adsorbent cyclic regeneration method, which comprises the following steps:
the adsorption tower receives the blast furnace gas, adsorbs high-concentration sulfides in the blast furnace gas, uses heated nitrogen gas to analyze adsorbed sulfur-containing substances after adsorption saturation, and outputs the analyzed gas to the multistage analysis gas treatment device;
the multistage analysis gas treatment device carries out multistage treatment on the analyzed gas to remove acid gas, particulate matters and sulfur-containing gas in the gas, and outputs purified nitrogen to the nitrogen gas storage device;
the nitrogen gas storage device stores nitrogen gas;
and the heating device heats the nitrogen in the nitrogen gas storage device and conveys the nitrogen into the adsorption tower.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a blast furnace gas dry desulphurization adsorbent circulating regeneration system, which comprises an adsorption tower, a multi-stage analysis gas treatment device, a nitrogen gas storage device and a heating device. The adsorption tower is used for receiving the blast furnace gas, adsorbing high-concentration sulfides in the blast furnace gas, resolving the high-concentration sulfides by using high-temperature nitrogen after the high-concentration sulfides are adsorbed and saturated, and outputting high-concentration sulfur-containing resolving gas to the multistage resolving gas treatment device. The multi-stage analysis gas treatment device is used for carrying out multi-stage treatment on the high-concentration sulfur-containing analysis gas to remove acid gas, particulate matters and sulfur-containing gas in the high-concentration sulfur-containing analysis gas, and outputting purified nitrogen to the nitrogen gas storage device. The nitrogen gas storage device is used for storing nitrogen gas, and the heating device heats the nitrogen gas in the nitrogen gas storage device and conveys the nitrogen gas into the adsorption tower. The treatment problem of the gas analyzed by the microcrystalline or molecular sieve blast furnace gas fine desulfurization process is effectively solved, the fine desulfurization adsorbent is recycled, the adsorption life is prolonged, the replacement frequency is reduced, and the investment and operation cost are reduced; the analytic gas adopts small-gas-volume nitrogen, so that the energy consumption is effectively reduced and the operation safety is improved.
The blast furnace gas dry desulphurization adsorbent recycling method provided by the invention and the blast furnace gas dry desulphurization adsorbent recycling system belong to the same invention concept, so that the method has the same beneficial effects, and the method is not repeated herein.
Drawings
FIG. 1 is a schematic structural diagram of a blast furnace gas dry desulfurization adsorbent recycling regeneration system according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for cyclically regenerating a blast furnace gas dry desulfurization adsorbent according to an embodiment of the present invention;
1-an adsorption tower, 2-a primary deacidification tower, 3-a hydrolysis tower, 4-a secondary deacidification tower, 5-a circulating fan, 6-a nitrogen gas storage device and 7-a heating device.
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Referring to fig. 1, an embodiment of the present invention provides a cyclic regeneration system of a blast furnace gas dry desulfurization adsorbent, including an adsorption tower, a multi-stage desorption gas treatment device, a nitrogen gas storage device, and a heating device;
the adsorption tower is used for receiving the blast furnace gas, adsorbing high-concentration sulfides in the blast furnace gas and outputting the analyzed high-concentration sulfur-containing analysis gas to the multistage analysis gas treatment device;
the multi-stage analysis gas treatment device is used for carrying out multi-stage treatment on the high-concentration sulfur-containing analysis gas to remove acid gas, particulate matters and sulfur-containing gas in the high-concentration sulfur-containing analysis gas, and outputting purified nitrogen to the nitrogen gas storage device for recycling;
the nitrogen gas storage device is used for storing nitrogen gas;
and the heating device heats and conveys the nitrogen in the nitrogen gas storage device into the adsorption tower.
The blast furnace gas dry desulphurization adsorbent recycling system provided by the embodiment comprises an adsorption tower, a multi-stage analysis gas treatment device, a nitrogen gas storage device and a heating device. The adsorption tower is used for receiving the blast furnace gas, adsorbing high-concentration sulfides in the blast furnace gas and outputting the analyzed high-concentration sulfur-containing analysis gas to the multistage analysis gas treatment device. The multi-stage analysis gas treatment device is used for carrying out multi-stage treatment on the high-concentration sulfur-containing analysis gas to remove acid gas, particles and sulfur-containing gas in the high-concentration sulfur-containing analysis gas, and outputting purified nitrogen to the nitrogen gas storage device. The nitrogen gas storage device is used for storing nitrogen gas, and the heating device heats the nitrogen gas in the nitrogen gas storage device and conveys the nitrogen gas into the adsorption tower. The treatment problem of the gas analyzed by the microcrystalline or molecular sieve blast furnace gas fine desulfurization process is effectively solved, the fine desulfurization adsorbent is recycled, the adsorption life is prolonged, the replacement frequency is reduced, and the investment and operation cost are reduced; the analytic gas adopts small-gas-volume nitrogen, so that the energy consumption is effectively reduced and the operation safety is improved.
By the scheme, the fine desulfurization of the blast furnace gas can be realized, and the total sulfur content (calculated by simple substance S) after purification can be reduced to 25mg/Nm 3 The existing discharge standard is met; the service life of the absorbent is prolonged, the replacement frequency of the absorbent is reduced, the operation cost is saved, the treatment problem of the integrated blast furnace gas fine desulfurization gas is effectively solved, and the blast furnace gas fine desulfurization can be completed early.
Specifically, in an embodiment of the present invention, the multi-stage resolution gas treatment unit comprises a first-stage deacidification tower for removing acid gases and particulates.
Specifically, in the embodiment of the invention, the multistage desorption gas treatment device further comprises a device for converting organic sulfide into H under the action of a catalyst 2 S gas hydrolysis tower.
Specifically, in the embodiment of the present invention, the multistage stripping gas treatment device further includes a secondary deacidification tower for removing sulfur-containing gas.
Specifically, in the embodiment of the present invention, a circulating fan is further disposed between the multistage analysis gas processing apparatus and the nitrogen gas storage apparatus, and is configured to output nitrogen gas to the nitrogen gas storage tank.
Specifically, in the embodiment of the invention, the heating device is a steam heat exchanger.
Specifically, in the embodiment of the present invention, the nitrogen gas storage device is a nitrogen gas storage tank.
Specifically, in the embodiment of the invention, the adsorption tower comprises an outlet for outputting clean gas to a gas pipe network.
Specifically, in the embodiment of the invention, the nitrogen gas storage device comprises an outlet for outputting clean gas to a gas pipe network.
According to the scheme provided in the embodiment, circulating hot nitrogen is adopted to desorb and adsorb saturated adsorbent, and the desorbed high-concentration sulfur-containing gas is subjected to H removal in the coal gas by a first-stage deacidification tower 2 S, cl-and other acidic gases, and then hydrolyzing COS in the coal gas by a hydrolysis tower to convert COS into H 2 S, finally performing secondary deacidificationColumn for removing H produced after hydrolysis 2 S gas, the removal of high-concentration sulfide in the desorption gas is realized. Realizes the problems of the cyclic regeneration of the desulfurizer and the analytic gas treatment of the integrated fine desulfurization process. Because the desorption gas generally only occupies 1 to 1.5 percent of the blast furnace gas, the acid removal tower and the hydrolysis tower in the regeneration process occupy smaller area, various devices are correspondingly smaller, the investment is saved, and the method has good economic benefit and social environmental benefit.
Referring to fig. 1, the original blast furnace gas passes through an adsorption tower filled with microcrystalline or molecular sieve adsorption material to remove high concentration COS and H contained in the blast furnace gas 2 S and other sulfides, and the total sulfur content (calculated by simple substance S) in the purified clean coal gas is reduced to 25mg/Nm 3 Sending the gas to a gas pipe network for use by downstream users; after the adsorbent is adsorbed and saturated, the adsorbent passes through a steam heat exchanger, hot nitrogen with the temperature of 150-180 ℃ enters an adsorption tower, and the high-concentration sulfur-containing gas after being analyzed passes through a first-stage deacidification tower to remove H contained in the high-concentration sulfur-containing gas 2 Acidic gases such as S, cl-and the like, particles such as dust and the like, and the subsequent hydrolysis catalyst are protected, the desorption gas passing through the primary deacidification tower enters the hydrolysis tower, and organic sulfides such as COS and the like are converted into H under the action of the catalyst 2 S, then enters a secondary deacidification tower to remove H 2 S gas and sulfur-containing gas in the nitrogen are removed finally, and the nitrogen is recycled by a draught fan, so that the problems of cyclic regeneration of the desulfurization adsorbent and reasonable disposal of the desorbed gas are solved.
Based on the same inventive concept, the present invention further provides a method for cyclically regenerating a blast furnace gas dry desulphurization adsorbent, please refer to fig. 2, which comprises:
s1: the adsorption tower receives the blast furnace gas, adsorbs high-concentration sulfides in the blast furnace gas, uses heated nitrogen to analyze adsorbed sulfur-containing substances after adsorption saturation, and outputs analyzed gas to the multistage analysis gas processing device;
s2: the multistage analysis gas treatment device carries out multistage treatment on the analyzed gas to remove acid gas, particulate matters and sulfur-containing gas in the gas, and outputs purified nitrogen to the nitrogen gas storage device;
s3: the nitrogen gas storage device stores nitrogen gas;
s4: and the heating device heats and conveys the nitrogen in the nitrogen gas storage device into the adsorption tower.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a blast furnace gas dry desulphurization adsorbent cyclic regeneration system, which comprises an adsorption tower, a multi-stage analysis gas treatment device, a nitrogen gas storage device and a heating device. The adsorption tower is used for receiving the blast furnace gas, adsorbing high-concentration sulfides in the blast furnace gas, resolving the high-concentration sulfides by using high-temperature nitrogen after the high-concentration sulfides are adsorbed and saturated, and outputting high-concentration sulfur-containing resolving gas to the multistage resolving gas treatment device. The multi-stage analysis gas treatment device is used for carrying out multi-stage treatment on the blast furnace gas to remove acid gas, particles and sulfur-containing gas in the blast furnace gas, and outputting purified nitrogen to the nitrogen gas storage device. The nitrogen gas storage device is used for storing nitrogen gas, and the heating device heats the nitrogen gas in the nitrogen gas storage device and conveys the nitrogen gas into the adsorption tower. The treatment problem of the gas analyzed by the microcrystalline or molecular sieve blast furnace gas fine desulfurization process is effectively solved, the fine desulfurization adsorbent is recycled, the adsorption life is prolonged, the replacement frequency is reduced, and the investment and operation cost are reduced; the analytic gas adopts small-gas-volume nitrogen, so that the energy consumption is effectively reduced and the operation safety is improved.
The blast furnace gas dry desulphurization adsorbent recycling method provided by the invention and the blast furnace gas dry desulphurization adsorbent recycling system belong to the same invention concept, so that the method has the same beneficial effects, and the method is not repeated herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example" or "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. And the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A blast furnace gas dry desulphurization adsorbent circulating regeneration system is characterized by comprising an adsorption tower, a multi-stage analysis gas treatment device, a nitrogen gas storage device and a heating device;
the adsorption tower is used for receiving the blast furnace gas, adsorbing high-concentration sulfides in the blast furnace gas and outputting the analyzed sulfur-containing gas to the multistage analysis gas processing device;
the multistage analysis gas treatment device is used for carrying out multistage treatment on the analyzed sulfur-containing gas to remove acid gas, particulate matters and the sulfur-containing gas, and outputting purified nitrogen to the nitrogen gas storage device for recycling;
the nitrogen gas storage device is used for storing nitrogen gas;
and the heating device heats and conveys the nitrogen in the nitrogen gas storage device into the adsorption tower.
2. The blast furnace gas dry desulfurization adsorbent cycle regeneration system of claim 1, wherein the multi-stage stripping gas treatment unit comprises a first-stage deacidification tower for removing acid gases and particulates.
3. The blast furnace gas dry desulfurization adsorbent cycle regeneration system of claim 2, wherein the multi-stage stripping gas treatment unit further comprisesFor converting organic sulfides into H under the action of catalysts 2 S gas hydrolysis tower.
4. The blast furnace gas dry desulfurization adsorbent cycle regeneration system of claim 3, wherein the multi-stage stripping gas treatment unit further comprises a secondary deacidification tower for removing sulfur-containing gases.
5. The blast furnace gas dry desulfurization adsorbent recycling and regenerating system according to claim 1, wherein a recycle blower is further provided between the multistage analysis gas processing device and the nitrogen gas storage device, and is used for outputting nitrogen gas into the nitrogen gas storage tank.
6. The blast furnace gas dry desulfurization adsorbent cycle regeneration system of claim 1, wherein the heating device is a steam heat exchanger.
7. The blast furnace gas dry desulfurization adsorbent cycle regeneration system of claim 1, wherein the nitrogen gas storage device is a nitrogen gas storage tank.
8. The blast furnace gas dry desulfurization adsorbent recycling system according to claim 1, wherein the adsorption tower comprises an outlet for outputting clean gas to a gas pipe network.
9. The blast furnace gas dry desulfurization adsorbent recycling regeneration system according to claim 1, wherein the nitrogen gas storage means comprises an outlet for outputting clean gas to a gas pipe network.
10. A blast furnace gas dry desulphurization adsorbent cyclic regeneration method is characterized by comprising the following steps:
the adsorption tower receives the blast furnace gas, adsorbs high-concentration sulfides in the blast furnace gas, uses heated nitrogen gas to analyze adsorbed sulfur-containing substances after adsorption saturation, and outputs the analyzed gas to the multistage analysis gas treatment device;
the multistage analysis gas treatment device carries out multistage treatment on the analyzed gas to remove acid gas, particulate matters and sulfur-containing gas in the gas, and outputs purified nitrogen to the nitrogen gas storage device;
the nitrogen gas storage device stores nitrogen gas;
and the heating device heats and conveys the nitrogen in the nitrogen gas storage device into the adsorption tower.
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| CN202211642620.6A CN115814563A (en) | 2022-12-20 | 2022-12-20 | Blast furnace gas dry desulphurization adsorbent cyclic regeneration system and method |
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