CN204057951U - The system of a kind of gas-based shaft kiln system reducing gas purification and vent gas treatment - Google Patents
The system of a kind of gas-based shaft kiln system reducing gas purification and vent gas treatment Download PDFInfo
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- CN204057951U CN204057951U CN201420333873.XU CN201420333873U CN204057951U CN 204057951 U CN204057951 U CN 204057951U CN 201420333873 U CN201420333873 U CN 201420333873U CN 204057951 U CN204057951 U CN 204057951U
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- Prior art keywords
- gas
- desulfurization
- unit
- decarburization
- shaft kiln
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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- Treating Waste Gases (AREA)
- Industrial Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model provides the system of the purification of a kind of gas-based shaft kiln system reducing gas and vent gas treatment, comprises the thick reducing gas unit (1) of system, thick reducing gas desulfurization and decarburization unit (2), desulfurization and decarburization acid gas processing unit (3), vent gas treatment and catalyst regeneration units (4), gas-based shaft kiln reduction iron production unit (5); Wherein, described system thick reducing gas unit (1) connects thick reducing gas desulfurization and decarburization unit (2), desulfurization and decarburization acid gas processing unit (3), vent gas treatment and catalyst regeneration units (4) successively; Described gas-based shaft kiln reduction iron production unit (5) is connected with described vent gas treatment and catalyst regeneration units (4); Described desulfurization and decarburization acid gas processing unit (3) comprises claus reaction device (14), molten sulfur storage tank (15); Described vent gas treatment and catalyst regeneration units (4) comprise tail gas catalyzed absorption tower (16) and catalyst regeneration tower (17).The utility model decreases exhaust emissions and environmental pollution.
Description
Technical field
The utility model relates to technical field of chemistry and chemical engineering, is specifically related to the thick reducing gas of a kind of coal/Sweet natural gas system, as the desulfurization and decarburization of gas-based shaft kiln reducing gas and the system and method for vent gas treatment.
Background technology
Current external multiplex product Sweet natural gas (wherein H
2s content≤20mg/m
3) make its partial oxidation production main component be CO and H
2reducing gas as the raw material direct reduction iron making of gas-based shaft kiln reducing gas.Compared with abroad, the natural gas source of China is relatively deficient, and there is most of Sweet natural gas to contain higher hydrogen sulfide in the natural gas source of China, if greatly production cost can be reduced with the relatively poor Sweet natural gas of this part quality as the synthesis material of gas-based shaft kiln reduction iron production reducing gas.In addition, coal resources in China relative abundance, not only increases the utilising efficiency of China's low-grade coal, and can reduce the production cost of gas-based shaft kiln reduction iron production further as the raw materials for production of gas-based shaft kiln reducing gas using the feed coal of poor quality.Current reducing gas refines the lower high-grade fuel coal of main employing sulphur content as raw material, or uses treated H
2s content is 20mg/m
3two following class natural gas are raw material.
Therefore, the Sweet natural gas that the latent sulfur content of employing is higher or low grade coal are as the reducing gas of producing gas-based shaft kiln, increase the utilization ratio of domestic inferior raw material coal and Sweet natural gas, enrich the utilization ways of low grade coal and Sweet natural gas, avoid the low grade coal release of acid atmosphere pollution etc. that directly burns to be the task of top priority.The Sweet natural gas that the latent sulfur content of the utility model employing is higher or low grade coal are raw material, can not only meet gas-based shaft kiln reduction iron production reducing gas specification of quality, can also make the H of whole gas-based shaft kiln reduction iron production system
2s and SO
2deng environmental pollutant zero release.
Utility model content
The purpose of this utility model solves the subproblem existed in the preparation purification of existing gas-based shaft kiln system reducing gas and vent gas treatment process, the Sweet natural gas that the latent sulfur content of exploitation is higher or low grade coal, as the reducing gas of producing gas-based shaft kiln, provide the system of the purification of a kind of gas-based shaft kiln system reducing gas and vent gas treatment.
The purpose of this utility model is achieved through the following technical solutions:
A system for the purification of gas-based shaft kiln system reducing gas and vent gas treatment, comprises the thick reducing gas unit of system, thick reducing gas desulfurization and decarburization unit, desulfurization and decarburization acid gas processing unit, vent gas treatment and catalyst regeneration units, gas-based shaft kiln reduction iron production unit; Wherein, described system thick reducing gas unit connects thick reducing gas desulfurization and decarburization unit, desulfurization and decarburization acid gas processing unit, vent gas treatment and catalyst regeneration units successively; Described gas-based shaft kiln reduction iron production unit is connected with vent gas treatment and catalyst regeneration units; Described desulfurization and decarburization acid gas processing unit comprises claus reaction device, molten sulfur storage tank; Described vent gas treatment and catalyst regeneration units comprise tail gas catalyzed absorption tower and catalyst regeneration tower.
Preferably, described thick reducing gas desulfurization and decarburization unit comprises water wash column, absorption tower, flash tank, regenerator column, water cooler, interchanger, lean pump, described water wash column connects absorption tower, flash tank, interchanger, water cooler, lean pump successively, and one end of described lean pump is connected to one end, absorption tower.
Preferably, described in described thick reducing gas desulfurization and decarburization unit, interchanger one end is connected with regenerator column top by pipeline, and the described interchanger the other end is connected with regenerator column by another pipeline.
Preferably, described in described desulfurization and decarburization acid gas processing unit master, desulfurization and decarburization acid gas processing unit also comprises acid gas incinerator, and described acid gas incinerator connects claus reaction device and molten sulfur storage tank successively.
Preferably, the tail gas catalyzed absorption tower in described vent gas treatment and catalyst regeneration units and catalyst regeneration tower can blocked operations.
The beneficial effect that the utility model provides:
(1) this utility model can reduce gas-based shaft kiln ironmaking preparation thick reducing gas raw material---coal, quality of natural gas requirement, low grade coal, Sweet natural gas can be adapted to, still this system can be used when sulphur content in coal or Sweet natural gas raises, ensure the reducing gas makings condition of gas-based shaft kiln ironmaking, and exhaust emissions requirement can be reached;
(2) this utility model can realize H
2s, SO
2zero release, adopts this utility model technique, and all gas all enters decarbonization desulfurization system and carries out circular treatment, makes the H that gasification system produces
2s or SO
2all be converted to byproduct sulphur thus accomplish H
2s and SO
2zero release;
(3) H in desulfurization and decarburization acid gas
2s all transforms, the desulfurization and decarburization acid gas processing unit involved by this utility model and conventional Claus sulphur recovery unit unlike, make more H
2s is converted to SO in acid gas incinerator
2, make to enter the SO in claus reaction device
2with H
2the ratio of S is slightly larger than 1/3rd, thus the H that guarantee enters in claus reaction device
2s all transforms.
(4) the changeable operation in tail gas catalyzed absorption tower is for absorbing SO
2, the vent gas treatment that this utility model relates to and catalyst regeneration units adopt Double-Tower Structure, and wherein one is tail gas catalyzed absorption tower, and another is catalyst regeneration tower, and two towers can switch use.Guarantee the SO in tail gas
2whole absorption, and blocked operation ensure that the continuity of vent gas treatment process.
(5) share resurgent gases system, vent gas treatment and catalyst regeneration units regeneration reducing used gas makings form the same with gas-based shaft kiln reducing gas, all come from thick reducing gas desulfurization and decarburization unit, avoid the expense of building resurgent gases generating unit again and producing.
(6) regeneration tail gas reusable edible, the same with gas-based shaft kiln circulation gas, regeneration tail gas returns thick reducing gas desulfurization and decarburization unit equally and carries out recycle, and reducing gas is used to greatest extent, reach while reducing discharging object, the consumption of coal and Sweet natural gas can be reduced again.
Accompanying drawing explanation
Fig. 1 is a kind of gas-based shaft kiln reducing gas purification of the utility model and exhaust treatment system structural map
1, thick reducing gas unit 2, thick reducing gas desulfurization and decarburization unit 3, desulfurization and decarburization acid gas processing unit 4, vent gas treatment and catalyst regeneration units 5, gas-based shaft kiln reduction iron production unit is made;
Fig. 2 thick reducing gas desulfurization and decarburization unit structural map
6, water wash column 7, absorption tower 8, flash tank 9, regenerator column 10, water cooler 11, interchanger 12, lean pump;
Fig. 3 desulfurization and decarburization acid gas processing unit structural map
13, acid gas incinerator 14, claus reaction device 15, molten sulfur storage tank;
Fig. 4 vent gas treatment and catalyst regeneration units structural map
16, tail gas catalyzed absorption tower 17, catalyst regeneration tower.
Embodiment
In order to better the utility model is described, below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described.
A kind of gas-based shaft kiln reducing gas purification provided by the utility model and exhaust treatment system comprise the thick reducing gas unit 1 of system, thick reducing gas desulfurization and decarburization unit 2, desulfurization and decarburization acid gas processing unit 3, vent gas treatment and catalyst regeneration units 4, gas-based shaft kiln reduction iron production unit 5 as shown in the figure.
Described system thick reducing gas unit 1 connects described thick reducing gas desulfurization and decarburization unit 2, described desulfurization and decarburization acid gas processing unit 3, described vent gas treatment and catalyst regeneration units 4 successively; Described thick reducing gas desulfurization and decarburization unit 2 and described vent gas treatment and catalyst regeneration units 4, described gas-based shaft kiln reduction iron production unit 5 are connected respectively; Described gas-based shaft kiln reduction iron production unit 5 is connected with described vent gas treatment and catalyst regeneration units 4.
Described thick reducing gas desulfurization and decarburization unit 2 comprises water wash column 6, absorption tower 7, flash tank 8, regenerator column 9, water cooler 10, interchanger 11, lean pump 12, described water wash column 6 connects absorption tower 7, flash tank 8, interchanger 11, water cooler 10, lean pump 12 successively, and one end of described lean pump 12 is connected to one end, absorption tower 7; Described interchanger 11 one end is connected with regenerator column 9 top by pipeline, and described interchanger 11 the other end is connected with regenerator column 9 by another pipeline.
Described desulfurization and decarburization acid gas processing unit 3 comprises acid gas incinerator 13, claus reaction device 14, molten sulfur storage tank 15, and described acid gas incinerator 13 connects claus reaction device 14 and molten sulfur storage tank 15 successively.
Described in described vent gas treatment and catalyst regeneration units 4, tail gas catalyzed absorption tower 16 and catalyst regeneration tower 17 can switch use in vent gas treatment agent catalyst regeneration process, guarantee the SO in tail gas
2whole absorption, and blocked operation ensure that the continuity of vent gas treatment process.
A kind of gas-based shaft kiln reducing gas purification that the utility model provides and the principle of work of exhaust treatment system as follows: prepare in unit 1 in thick reducing gas and adopt the method for pulverized coal pyrolysis or the method for gas by partial oxidation of natural to prepare thick reducing gas, obtained thick reducing gas enters thick reducing gas desulfurization and decarburization unit 2.First enter thick reducing gas water wash column 6, the water counter current contact that gas sprays with water wash column 6 tower top from bottom to top, wash away the dust be mixed in the middle of thick reducing gas.Gas after washing out enters absorption tower 7 afterwards from water wash column 6 top.Gas enters from bottom, absorption tower 7, and the desulfurization and decarburization solution counter current contact sprayed with tower top reacts, and absorbs H wherein
2s and CO
2.After purification, reducing gas one tunnel enters gas-based shaft kiln reduction iron production unit 5 after heater heats, and another road enters vent gas treatment and catalyst regeneration units 4.Desulfurization and decarburization solution in absorption tower 7 enters flash tank 8 by pressure reduction, and the rich solution after flash distillation to be entered in regenerator column 9 by top by interchanger 11 and regenerates.Desulfurization and decarburization solution after regeneration carries out heat exchange through interchanger 11 and desulfurization and decarburization rich solution.After heat exchange, desulfurization and decarburization solution completes circulation by being returned in absorption tower 7 by lean pump 12 after water cooler 10 cooling again.Sour gas after desulfurization and decarburization regeneration of waste liquor enters desulfurization and decarburization acid gas processing unit 3.
First sour gas from desulfurization and decarburization unit 2 enters acid gas incinerator 13, at this and O
2react.Acid gas after reaction enters claus reaction device 14, under the effect of claus catalyst, claus reaction occurs, and required catalyzer is γ-Al
2o
3or TiO
2.During owing to reacting in acid gas incinerator 13, control more O
2enter.Therefore the SO in claus reaction device 14 is entered
2: H
2s>1:2 thus ensure in reaction process, H
2s reacts completely.The elemental sulfur produced is Molten sulphur, enters molten sulfur storage tank 15.Main component is CO
2and SO
2tail gas enter vent gas treatment and catalyst regeneration units 4.
Vent gas treatment and catalyst regeneration units are made up of tail gas catalyzed absorption tower 16 and catalyst regeneration tower 17, and two one of them towers of tower absorb, and another tower regenerates, blocked operation.From the tail gas of desulfurization acid gas processing unit 3, enter tail gas catalyzed absorption tower 16 by top, absorption agent is through the modified magnesium aluminum-hydrotalcite of Fe, La.
Tail gas expellant gas after tail gas absorber 16 is CO
2, by compression cooling recovering liquid CO
2.When the sorbent material in tail gas catalyzed absorption tower 16 wherein reach absorption saturated after, switch catalyst regeneration tower 17 as tail gas catalyzed absorption tower.Tail gas catalyzed absorption tower 16 switches to catalyst regeneration tower.Resurgent gases is the reducing gas coming from thick reducing gas desulfurization and decarburization unit 2 equally.After regenerative response, tail gas returns thick reducing gas desulfurization and decarburization unit 2 and processes, and main component is H
2s, CO
2, CO and H
2.Operation before can repeating after catalyst regeneration tower 17 is saturated as the absorption of tail gas catalyzed absorption tower.Tail gas after vent gas treatment and catalyst regeneration units 4 process consists of: CO
2content 99.9%, SO
2do not detect, H
2s does not detect.
Reducing gas from thick reducing gas desulfurization and decarburization unit 2 enters gas-based shaft kiln reduction iron production unit 5 reducing iron oxides pelletizing, and the reduction iron production circulation gas main component after reaction is H
2o, CO
2, CO and H
2, return thick reducing gas desulfurization and decarburization unit 2 and utilize through desulfurization and decarburization process Posterior circle.Also can pass into catalyst regeneration tower 17 pairs of catalyzer to regenerate, then enter the recycle of thick reducing gas desulfurization and decarburization unit 2 by regeneration recycle gas.
The utility model compared with prior art, has the following advantages and improves:
(1) this system is for the reducing gas makings condition of latent sulfur content higher (>=5t/d), replaces desulfurizer, gas-based shaft kiln reduction iron production system can be made to realize H by desulfurization and decarburization acid gas processing unit and vent gas treatment and catalyst regeneration units
2s and SO
2zero release, and recyclable byproduct sulphur and carbonic acid gas;
(2) this technique can reduce the environmental pollution of system itself, accomplishes low-carbon emission reduction, and achieves the Appropriate application of resource;
(3) this technique avoids H compared with original technique only having desulfurizer to carry out vent gas treatment
2the secondary pollution that S desorption brings and desulfurization are given up the solid waste pollution of agent.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (6)
1. the system of a gas-based shaft kiln system reducing gas purification and vent gas treatment, it is characterized in that, comprise the thick reducing gas unit (1) of system, thick reducing gas desulfurization and decarburization unit (2), desulfurization and decarburization acid gas processing unit (3), vent gas treatment and catalyst regeneration units (4), gas-based shaft kiln reduction iron production unit (5); Wherein, described system thick reducing gas unit (1) connects thick reducing gas desulfurization and decarburization unit (2), desulfurization and decarburization acid gas processing unit (3), vent gas treatment and catalyst regeneration units (4) successively; Described gas-based shaft kiln reduction iron production unit (5) is connected with described vent gas treatment and catalyst regeneration units (4); Described desulfurization and decarburization acid gas processing unit (3) comprises claus reaction device (14), molten sulfur storage tank (15); Described vent gas treatment and catalyst regeneration units (4) comprise tail gas catalyzed absorption tower (16) and catalyst regeneration tower (17).
2. the system of gas-based shaft kiln system reducing gas purification according to claim 1 and vent gas treatment, it is characterized in that, described thick reducing gas desulfurization and decarburization unit (2) and described vent gas treatment and catalyst regeneration units (4), described gas-based shaft kiln reduction iron production unit (5) are connected respectively.
3. the system of gas-based shaft kiln system reducing gas purification according to claim 1 and vent gas treatment, it is characterized in that, described thick reducing gas desulfurization and decarburization unit (2) comprises water wash column (6), absorption tower (7), flash tank (8), regenerator column (9), water cooler (10), interchanger (11), lean pump (12), described water wash column (6) connects absorption tower (7) successively, flash tank (8), interchanger (11), water cooler (10), lean pump (12), one end of described lean pump (12) is connected to absorption tower (7) one end.
4. the system of gas-based shaft kiln system reducing gas purification according to claim 3 and vent gas treatment, it is characterized in that, described in described thick reducing gas desulfurization and decarburization unit (2), interchanger (11) one end is connected with regenerator column (9) top by pipeline, and described interchanger (11) the other end is connected with regenerator column (9) by another pipeline.
5. the system of gas-based shaft kiln system reducing gas purification according to claim 1 and vent gas treatment, it is characterized in that, described desulfurization and decarburization acid gas processing unit (3) also comprises acid gas incinerator (13), and described acid gas incinerator (13) connects claus reaction device (14) and molten sulfur storage tank (15) successively.
6. the system of gas-based shaft kiln system reducing gas purification according to claim 1 and vent gas treatment, it is characterized in that, described in described vent gas treatment and catalyst regeneration units (4), tail gas catalyzed absorption tower (16) and catalyst regeneration tower (17) can switch use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420333873.XU CN204057951U (en) | 2014-06-20 | 2014-06-20 | The system of a kind of gas-based shaft kiln system reducing gas purification and vent gas treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420333873.XU CN204057951U (en) | 2014-06-20 | 2014-06-20 | The system of a kind of gas-based shaft kiln system reducing gas purification and vent gas treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204057951U true CN204057951U (en) | 2014-12-31 |
Family
ID=52199506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420333873.XU Withdrawn - After Issue CN204057951U (en) | 2014-06-20 | 2014-06-20 | The system of a kind of gas-based shaft kiln system reducing gas purification and vent gas treatment |
Country Status (1)
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|---|---|
| CN (1) | CN204057951U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030243A (en) * | 2014-06-20 | 2014-09-10 | 北京神雾环境能源科技集团股份有限公司 | System and method for reducing gas purification and tail gas treatment of gas base shaft furnace system |
| CN109071226A (en) * | 2016-03-23 | 2018-12-21 | 埃克森美孚研究工程公司 | The Claus unit processing of parking tail gas |
-
2014
- 2014-06-20 CN CN201420333873.XU patent/CN204057951U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104030243A (en) * | 2014-06-20 | 2014-09-10 | 北京神雾环境能源科技集团股份有限公司 | System and method for reducing gas purification and tail gas treatment of gas base shaft furnace system |
| CN104030243B (en) * | 2014-06-20 | 2016-04-20 | 北京神雾环境能源科技集团股份有限公司 | The system and method for a kind of gas-based shaft kiln system reducing gas purification and vent gas treatment |
| CN109071226A (en) * | 2016-03-23 | 2018-12-21 | 埃克森美孚研究工程公司 | The Claus unit processing of parking tail gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141231 Effective date of abandoning: 20160420 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |