CN202786159U - Reducing gas purification system matched with air base shaft furnace - Google Patents
Reducing gas purification system matched with air base shaft furnace Download PDFInfo
- Publication number
- CN202786159U CN202786159U CN201220496879XU CN201220496879U CN202786159U CN 202786159 U CN202786159 U CN 202786159U CN 201220496879X U CN201220496879X U CN 201220496879XU CN 201220496879 U CN201220496879 U CN 201220496879U CN 202786159 U CN202786159 U CN 202786159U
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- Prior art keywords
- unit
- gas
- desulfurization
- reducing gas
- gas purification
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- 238000000746 purification Methods 0.000 title claims abstract description 22
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 40
- 230000023556 desulfurization Effects 0.000 claims abstract description 40
- 238000005261 decarburization Methods 0.000 claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 12
- 230000008929 regeneration Effects 0.000 claims description 9
- 238000011069 regeneration method Methods 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 abstract description 4
- 238000002309 gasification Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 83
- 238000000034 method Methods 0.000 description 24
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 13
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000007788 liquid Substances 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 7
- 239000011593 sulfur Substances 0.000 description 7
- 239000003034 coal gas Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 241000282326 Felis catus Species 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 235000009508 confectionery Nutrition 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
Images
Classifications
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model provides a reducing gas purification system matched with air base shaft furnace, which is characterized of including a coal gasification unit, a coarse desulfurization unit, a first compression unit, a commutation unit, a mixed unit, a first decarburization desulfurization unit, a heating unit, a reduction shaft furnace unit, a second decarburization desulfurization unit, and a second compression unit; wherein the coal gasification unit is connected with the coarse desulfurization unit, the first compression unit, the commutation unit, and the mixed unit. The reducing gas purification system not only reduces energy consumption, but also make full use of top gas of the shaft furnace, and can achieve the purification and recycle of the top gas at the same time.
Description
Technical field
The present invention relates to a kind of gas treating system, particularly relate to reducing gas purification system a kind of and that gas-based shaft kiln is supporting.
Background technology
At present, the mode of external multiplex gas renormalizing reducing gas processed provides CO+H
2Reducing gas, and abroad compare owing to be subject to the restriction of natural gas source, China does not have large-scale shaft furnace process direct-reduced iron production plant so far.Yet rich coal resources in China, the level of resources utilization of coal is lower, if will carry out after the gasification deep purifying desulfurization process as unstripped gas, mix with an amount of water vapour etc. again, advance shift converter and carry out transformationreation and can obtain H
2The H of/CO between 4.6-1.5
2Gas mixture with CO.These gas mixtures can be used as the reducing gas that direct-reduction is produced sponge iron, and have the advantages such as cheap.
Most sulfur-bearing in the gas of gasification, this operating mode will be brought very adverse influence to type selecting and the operation of gas compressor, therefore require to carry out first the raw gas desulfurization, then just can enter gas-based shaft kiln as the process gas of reduced iron through operations such as overdraft, CO conversion, smart desulfurization, decarburizations.In the raw gas sulfur removal technology, if take ammoniacal liquor liquid catalytic, modified ADA method, tannin extract method, KCA method etc., also can satisfy the requirement of desulfurizing and purifying technique, but because the greatest drawback of these sulfur methods is that the solution Sulfur capacity is low, high and process broad-minded operating mode for sulphur content, exist the drawbacks such as the solution circulated amount is large, manipulation strength is large, energy consumption is high.And the raw gas desulfurization is to adopt different Technologies to finish with processes such as follow-up smart desulfurization, decarburizations.This is so that whole device flow process is comparatively complicated, and operational administrative is inconvenient, and the facility investment expense is higher.
The utility model content
The utility model is for the deficiencies in the prior art, reducing gas purification system a kind of and that gas-based shaft kiln is supporting is provided, the problems such as the manipulation strength that exists in traditional sulfur method is large, energy consumption is high have been solved, and the raw gas desulfurization is adopted different Technologies with process needs such as follow-up smart desulfurization, decarburizations and the device flow process that causes is complicated, the problems such as facility investment expense height solve simultaneously top gas and purify and recycle.
The purpose of this utility model is achieved through the following technical solutions:
The used system of reducing gas purification process that a kind of and gas-based shaft kiln is supporting comprises the gas maked coal unit, thick desulfurization unit, the first compressed element, converter unit, mixed cell, smart desulfurization and decarburization unit, heating unit, the reduction shaft furnace unit, the second compressed element, wherein, described gas maked coal unit connects thick desulfurization unit successively, the first compressed element, converter unit, mixed cell, smart desulfurization and decarburization unit, heating unit, the reduction shaft furnace unit, the second compressed element, mixed cell.
Described gas maked coal unit is connected with described heating unit.
Described the second compressed element is connected with smart desulfurization and decarburization unit.
Described heating unit is tubular oven.
Also comprise the regeneration of waste liquor unit, described regeneration of waste liquor unit respectively with described thick desulfurization unit be connected smart desulfurization and decarburization unit and be connected.
Also comprise clean unit, described clean unit connects reduction shaft furnace unit and smart desulfurization and decarburization unit.
The Heating temperature of described heating unit is 900 ℃.
The technical scheme that the utility model provides, adopt the thick desulfurization of coal gas and reducing gas desulfurization and decarburization all in the equipment that adopts same solvent N methyldiethanol amine (being MDEA), to carry out, the MDEA of simultaneously desulfurization and the MDEA of desulfurization and decarburization share a cover solution regeneration system, simultaneously because the CO that generates except reaction in the vertical furnace top gas
2Outside water, a large amount of CO and H are arranged still
2Do not participate in reaction, for utilization ratio and the raising economic performance that improves reducing gas, the purification process of shaft furnace furnace roof circulation gas also can be merged in the purification system of the present invention, thus simplified system, saving energy consumption, the utilization ratio that improves reducing gas, minimizing number of devices and investment.
Description of drawings
Fig. 1 be in the utility model with the process flow sheet of the supporting reduction purification system of gas-based shaft kiln
Embodiment
For the utility model better is described, the accompanying drawing below in conjunction with among the embodiment is clearly and completely described technical scheme.
1. thick desulfurization: raw gas enters purification system after the techniques such as dedusting, washing, in thionizer with tower in MDEA solution counter current contact so that most of H of gas mixture body weight
2S and part SO
2Be absorbed with COS.The raw gas (normal temperature) that goes out thionizer enters the cat head water cooler, will be cooled to 40 ℃ because absorbing the process gas that heats up, and process gas is carried out gas-liquid separation, reclaims the MDEA absorption liquid.Then process gas gas delivery compression.The rich solution of discharging at the bottom of the thionizer carries out desulfurization regeneration, and the MDEA solution after the regeneration returns thionizer after interchanger and solution cooler heat exchange and decarbonizing tower recycles.
2. compress 1: after compressor is compressed to certain pressure with coal gas, import shift conversion step.
3. conversion: the gas compressor exit gas enters shift conversion step under certain pressure and temperature, separate entrained oil water in the compression process through water-and-oil separator, entering mixing tank with water vapor makes steam fully mix with coal gas, about 65% raw gas enters heat exchanger, is that the heat exchange of entrance coal gas heats up with the conversion gas that goes out shift converter.Coal gas rises to 300～360 ℃ by 130 ℃; Conversion gas is down to 150～180 ℃ by 400～350 ℃.Then through water cooler, temperature is down to about 40 ℃, then enters gas-liquid separator, returns gas compressor behind the separating technology phlegma, H in the reducing gas behind the compressed machine pressure-raising
2/ CO volume ratio is between 4.6-1.5.
4. mix: gas compressor outlet conversion gas mixes with shaft furnace furnace roof recycle gas compressor outlet reducing gas.The reducing gas that Sweet natural gas or coke-oven gas make is mixed with shaft furnace furnace roof recycle gas compressor outlet reducing gas.
5. smart desulfurization and decarburization: enter the air inlet oil eliminator after the reducing gas of the conversion gas of gas maked coal and recycle gas compressor outlet (or the reducing gas that makes of Sweet natural gas or coke-oven gas is mixed with the shaft furnace furnace roof recycle gas compressor outlet reducing gas) mixing, laggard smart desulfurization and decarburization tower, the reducing gas bottom in and top out, the absorption liquid upper entering and lower leaving, counter current contact.Gas after the decarburization by cat head out enters the cat head water cooler, reclaiming MDEA absorption liquid.Send into tubular oven (H behind the reducing gas upon mediation pressure after the purification
2+ CO can reach more than 88%, H
2/ CO can regulate between 4.6-1.5, and oxidisability can reach＜5%, the about 1.0MPa of pressure (G)) send process furnace after regulating pressure.
6. diamond heating: be used for being heated to the needed temperature of reduction shaft furnace iron ~ 900 ℃ to reducing gas.
7. compress 2: carrying 400～450 ℃ in iron ore dust secretly through the reacted process gas of reduction shaft furnace and discharged by the shaft furnace top, eject the top gas that comes by shaft furnace and enter the water washing dedust tower, purified gas is made fuel through circulation gas gas-liquid separator small part as discharging the pneumatic transmission process furnace, to keep the inert gas balance of system, major part is sent into the clean desulfurization and decarburization of MDEA with fresh conversion gas after boosting to certain pressure as circulation pneumatic transmission recycle gas compressor.
Of the present utility model have a following beneficial effect:
1. the difficulty of reduce cost, reduction operation removed the most of sulphur in the raw gas before transformationreation in advance, had reduced the e-quipment and pipe of conversion and decarbonization process to the design requirements of material, had reduced investment; The MDEA stability of solution is good, does not degrade, and volatility is little, and is little to carbon steel equipment corrosion, low to hydrocarbon solubility; Same solvent MDEA is all adopted in the purification of the thick desulfurization of coal gas, reducing gas desulfurization and decarburization and vertical furnace top gas, and MDEA desulfurization and MDEA desulfurization and decarburization share a cover solution regeneration system, have been convenient to operation and management.
2. multiple-effect removes performance, can remove simultaneously H in a system
2S, organosulfur, SO
2, COS, CO
2Deng, and satisfy by-product CO in regeneration time-division other places reason
2Gas product, H
2S concentrates and waits requirement.
3. degree of purification is high, purified gas total sulfur≤10mg/m
3, CO
2Content≤1%.
4. the solution absorption ability is large, because MDEA is for CO
2, H
2S has superior absorptive character at low temperatures, compares with other purifying method to have solution Sulfur capacity height, absorbs CO
2Ability is high, and the solution circulated amount is low, manipulation strength is large, energy consumption is high
5. reduction energy consumption adopts the recycle of vertical furnace top gas, participates in the reaction of reduction shaft furnace iron, has saved the required reducing gas of the reduction identical taste iron ore of unit mass, thereby has saved consumption of coal.
From above-mentioned analysis as can be known, the gas purifying technique that the utility model uses has been saved technology investment and running cost, and the simultaneously recycle of vertical furnace top gas has reduced energy consumption.
The above; it only is the better embodiment of the utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the 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 (7)
1. a system used with the supporting reducing gas purification process of gas-based shaft kiln is characterized in that, comprises the gas maked coal unit, thick desulfurization unit, the first compressed element, converter unit, mixed cell, smart desulfurization and decarburization unit, heating unit, the reduction shaft furnace unit, the second compressed element, wherein, described gas maked coal unit connects thick desulfurization unit successively, the first compressed element, converter unit, mixed cell, the first smart desulfurization and decarburization unit, heating unit, the reduction shaft furnace unit, the second compressed element, mixed cell.
2. the supporting used system of reducing gas purification process of according to claim 1 and gas-based shaft kiln is characterized in that described gas maked coal unit is connected with described heating unit.
3. the supporting used system of reducing gas purification process of according to claim 1 and gas-based shaft kiln is characterized in that described the second compressed element is connected with smart desulfurization and decarburization unit.
4. the supporting used system of reducing gas purification process of according to claim 1 and gas-based shaft kiln is characterized in that described heating unit is tubular oven.
5. system according to claim 1, used with the supporting reducing gas purification process of gas-based shaft kiln is characterized in that, also comprises the regeneration of waste liquor unit, described regeneration of waste liquor unit respectively with described thick desulfurization unit be connected smart desulfurization and decarburization unit and be connected.
6. the supporting used system of reducing gas purification process of according to claim 1 and gas-based shaft kiln is characterized in that also comprise clean unit, described clean unit connects reduction shaft furnace unit and smart desulfurization and decarburization unit.
7. the supporting used system of reducing gas purification process of according to claim 1 and gas-based shaft kiln is characterized in that the Heating temperature of described heating unit is 900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220496879XU CN202786159U (en) | 2012-09-26 | 2012-09-26 | Reducing gas purification system matched with air base shaft furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220496879XU CN202786159U (en) | 2012-09-26 | 2012-09-26 | Reducing gas purification system matched with air base shaft furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202786159U true CN202786159U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220496879XU Expired - Fee Related CN202786159U (en) | 2012-09-26 | 2012-09-26 | Reducing gas purification system matched with air base shaft furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876828A (en) * | 2012-09-26 | 2013-01-16 | 北京神雾环境能源科技集团股份有限公司 | Reducing gas purification process and system matched with gas-based shaft furnace |
-
2012
- 2012-09-26 CN CN201220496879XU patent/CN202786159U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876828A (en) * | 2012-09-26 | 2013-01-16 | 北京神雾环境能源科技集团股份有限公司 | Reducing gas purification process and system matched with gas-based shaft furnace |
| CN102876828B (en) * | 2012-09-26 | 2015-07-01 | 北京神雾环境能源科技集团股份有限公司 | Reducing gas purification process and system matched with gas-based shaft furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: BEIJING HUAFU ENGINEERING Co.,Ltd. Assignor: BEIJING SHENWU ENVIRONMENT AND ENERGY TECHNOLOGY Co.,Ltd. Contract record no.: 2013990000862 Denomination of utility model: Reducing gas purification system matched with air base shaft furnace Granted publication date: 20130313 License type: Exclusive License Record date: 20131219 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 102200 Beijing City, Changping District science and Technology Park Chang Huai Lu No. 155 Patentee after: Shenwu Technology Group Co.,Ltd. Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18 Patentee before: BEIJING SHENWU ENVIRONMENT AND ENERGY TECHNOLOGY Co.,Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Reducing gas purification system matched with air base shaft furnace Effective date of registration: 20180322 Granted publication date: 20130313 Pledgee: The Bank of Beijing Limited by Share Ltd. Anwar Road Branch Pledgor: Shenwu Technology Group Co.,Ltd. Registration number: 2018990000210 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20190121 Granted publication date: 20130313 |
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| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20220921 Granted publication date: 20130313 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 |