CN205635670U - System for clean gas of coal gasification preparation base shaft furnace is crude gas still - Google Patents
System for clean gas of coal gasification preparation base shaft furnace is crude gas still Download PDFInfo
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- CN205635670U CN205635670U CN201620298143.XU CN201620298143U CN205635670U CN 205635670 U CN205635670 U CN 205635670U CN 201620298143 U CN201620298143 U CN 201620298143U CN 205635670 U CN205635670 U CN 205635670U
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- 238000002309 gasification Methods 0.000 title claims abstract description 52
- 239000003245 coal Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 93
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 63
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 38
- 230000023556 desulfurization Effects 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 28
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 17
- 239000001257 hydrogen Substances 0.000 claims abstract description 17
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 30
- 238000001816 cooling Methods 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 238000010521 absorption reaction Methods 0.000 claims description 16
- 229910002804 graphite Inorganic materials 0.000 claims description 16
- 239000010439 graphite Substances 0.000 claims description 16
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 16
- 230000035939 shock Effects 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 11
- 229910052697 platinum Inorganic materials 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910001423 beryllium ion Inorganic materials 0.000 claims description 2
- 125000002091 cationic group Chemical group 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 239000003014 ion exchange membrane Substances 0.000 claims description 2
- 229910001092 metal group alloy Inorganic materials 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 22
- 239000002250 absorbent Substances 0.000 abstract description 14
- 230000002745 absorbent Effects 0.000 abstract description 14
- 230000008929 regeneration Effects 0.000 abstract description 3
- 238000011069 regeneration method Methods 0.000 abstract description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 9
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000003034 coal gas Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011946 reduction process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005341 cation exchange Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 231100000957 no side effect Toxicity 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
-
- 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
Landscapes
- Gas Separation By Absorption (AREA)
- Industrial Gases (AREA)
Abstract
The utility model relates to a pass through system for clean gas of coal gasification preparation base shaft furnace is crude gas still, including coal gasification unit, desulfurization unit and electrolysis equipment, the gas outlet of coal gasification unit connect in the air inlet of desulfurization unit, the gas outlet of desulfurization unit with electrolysis equipment's hydrogen export is connected to still crude gas's admission line of gas base shaft furnace jointly, the liquid outlet of desulfurization unit is connected to electrolysis equipment's inlet, electrolysis equipment's reverse being connected to of liquid outlet the inlet of desulfurization unit. The utility model discloses a system through electrolysis regeneration absorbent method, can realize the cyclic utilization of absorbent, and still crude gas's H2CO proportion can be adjusted to the hydrogen that electrolysis simultaneously produced to messenger still crude gas reaches the still crude gas requirement of gas base shaft furnace, and the oxygen source of coal gasification still can further be regarded as to the oxygen that the electrolysis produced.
Description
Technical field
This utility model relates to the system and method for the clean gas-based shaft kiln reducing gases of a kind of coal gasification preparation, relates to reducing gases and prepares field of purification.
Background technology
The resources characteristic of China is many coals, few oil, few natural gas, and the coal gas therefore obtained using coal for the energy with coke-stove gas, coal gas etc. is the inevitable choice of China's Shaft Furnace Direct Reduction Process development as reducing gases.During the coking and gasification of coal, the sulfur in coal is mainly with H2The form of S enters gas phase so that all contain substantial amounts of H in coke-stove gas and coal gas2S, being required to after desulfurization could be further with, otherwise can affect the quality of shaft kiln directly reduced product sponge iron.
For the removing of hydrogen sulfide, reported processing method is a lot, and these methods are broadly divided into two big classes: dry-desulphurizer sulfur removal technology and wet desulphurization agent sulfur removal technology.Removing H2S both can environment purification, the most recyclable sulfur, therefore, research and develop efficient removal H2S new technique, has great importance to environmental conservation.The removing sulfuldioxide of hydrogen sulfide, through the development of decades, has been achieved for a lot of achievement.Increasingly strict along with environmental regulation, input efficient, low, resource, the technology of non-secondary pollution cause the attention of people the most day by day, the emerging sulfur method such as such as microbial decomposition method, Ozonation, electrochemical process, microwave method.
At present, equipment is simple, small investment, mild condition, desulfuration efficiency are high owing to having for Electrochemistry Desulfurization method, does not has the advantages such as secondary pollution to environment, it has also become the focus of Recent study.Electrochemical process removing hydrogen sulfide is used to have following superiority: (1) electrochemical apparatus is simple, investment, it is not necessary to original equipment is carried out bigger transformation；(2) Operation and Maintenance is simple, can use the most continuously, practicable unattended, easily regulate；(3) physics and chemical property impact on system are less, have no side effect.
In reduction shaft furnace prepares the actual production of sponge iron, any shaft furnace process all must use hydrogen-rich gas also original production sponge iron.Owing to CO reduction process is exothermic reaction, hydrogen reducing reaction is the endothermic reaction.If CO too high levels in reducing gases, the thermal accumlation that the reduction exothermic reaction of Local C O produces may make the temperature of local furnace charge more than 950 DEG C, cause local furnace charge to soften caking.It addition, during be higher than the reducing gases also original production sponge iron of 33% containing CO, serious analysis carbon can occur in 400 DEG C～700 DEG C of heating and cooling process, have a strong impact on shaft furnace and the trouble-free operation of reducing gases heating furnace.And, under long term high temperature environment, CO can corrode furnace tubing, is locally generated lamellar Fe3C, irregularly comes off, and long is easy for occurring the serious accident of boiler tube gas leak.In CO reduction process, pellet is easily generated the phenomenons such as expansion, fragmentation, and by these phenomenons during hydrogen reducing almost without occurring.It addition, the reduction rate of hydrogen is significantly larger than the reduction rate of CO.Therefore, use hydrogen-rich gas to produce the stable operation that sponge iron is more beneficial for producing, reduce operating cost and process energy consumption.
Utility model content
The purpose of this utility model is to provide a kind of system by the clean gas-based shaft kiln reducing gases of coal gasification preparation.
System described in the utility model, including coal gasification unit, desulfurization unit and electrolysis installation；The gas outlet of described coal gasification unit is connected to the air inlet of described desulfurization unit, and the gas outlet of described desulfurization unit and the hydrogen outlet of described electrolysis installation are commonly connected to the admission line of gas-based shaft kiln reducing gases；
The liquid outlet of described desulfurization unit is connected to the inlet of described electrolysis installation, the inlet of the liquid outlet Opposite direction connection of described electrolysis installation to described desulfurization unit.
System described in the utility model, the oxygen outlet of described electrolysis installation is connected to the air inlet of described coal gasification unit.
System described in the utility model, described desulfurization unit includes that absorption tower and subsider, the tower body on described absorption tower are provided with air inlet, gas outlet, inlet and liquid outlet, and described gas outlet is positioned at the top of inlet, and described inlet is positioned at the top of air inlet；The top of described subsider is provided with inlet and liquid outlet, and bottom is provided with elemental sulfur outlet；The liquid outlet on described absorption tower is connected to the inlet of described subsider, and the liquid outlet of described subsider is connected to the inlet of electrolysis installation.
System described in the utility model, described coal gasification unit includes gasification furnace and is positioned at the shock chamber bottom described gasification furnace and cooling tower；The down-comer of described gasification furnace leads in the cooling chamber of described shock chamber；The gas outlet of described shock chamber is connected with described cooling tower, and the gas outlet of described cooling tower is connected to the air inlet of described desulfurization unit；
The top of described shock chamber is provided with cooling water inlet and gas outlet, and lower section is provided with lime-ash outlet；
Described gasification furnace is water-cooling wall airflow bed gasification furnace.
System described in the utility model, described electrolysis installation is electrolysis bath, and the anode of described electrolysis bath selects graphite electrode or metal electrode；The material of described graphite electrode is graphite cake or carbon cloth, and the material of described metal electrode is lead, titanium, ruthenium or corrosion resistant metal alloy electrodes；Negative electrode is platinum electrode, platinum plating graphite electrode or stainless steel electrode；Described electrolysis bath is divided into anode chamber and cathode chamber, described barrier film to be ion exchange membrane by barrier film.
Described electrolysis bath is preferably: the anode of electrolysis bath selects graphite electrode；Negative electrode is platinum plating graphite electrode；Described electrolysis bath is divided into anode chamber and cathode chamber by cation exchange membrane.
System described in the utility model, the absorbent in described desulfurization unit is Fe3+The mixed solution of acid of halogen saline solution and corresponding halogen, the pH of described solution is 4～7.
System described in the utility model, its structure is preferably:
Including coal gasification unit, desulfurization unit and electrolysis installation；The gas outlet of described coal gasification unit is connected to the air inlet of described desulfurization unit, and the gas outlet of described desulfurization unit and the hydrogen outlet of described electrolysis installation are commonly connected to the admission line of gas-based shaft kiln reducing gases；
The liquid outlet of described desulfurization unit is connected to the inlet of described electrolysis installation, the inlet of the liquid outlet Opposite direction connection of described electrolysis installation to described desulfurization unit.
The inlet of the liquid outlet Opposite direction connection of described electrolysis installation extremely described desulfurization unit.
Described desulfurization unit includes that absorption tower and subsider, the tower body on described absorption tower are provided with air inlet, gas outlet, inlet and liquid outlet, and described gas outlet is positioned at the top of inlet, and described inlet is positioned at the top of air inlet；The top of described subsider is provided with inlet and liquid outlet, and bottom is provided with elemental sulfur outlet；The liquid outlet on described absorption tower is connected to the inlet of described subsider, and the liquid outlet of described subsider is connected to the inlet of electrolysis installation.
Described coal gasification unit includes water-cooling wall airflow bed gasification furnace and is positioned at the shock chamber bottom described gasification furnace and cooling tower；The down-comer of described gasification furnace leads in the cooling chamber of described shock chamber；The gas outlet of described shock chamber is connected with described cooling tower, and the gas outlet of described cooling tower is connected to the air inlet of described desulfurization unit.
The anode of described electrolysis bath selects graphite electrode；Negative electrode is platinum plating graphite electrode；Described electrolysis bath is divided into anode chamber and cathode chamber by cationic membrane.
The operational approach of system described in the utility model is as follows:
1) feed coal carries out gasification reaction with gasifying agent after crushed in coal gasification unit, obtains raw gas；
2) described raw gas is passed through absorption tower, absorbs through absorbent, remove hydrogen sulfide therein, obtain purified gas；
3) hydrogen that described purified gas is prepared with described electrolysis installation mixes, and obtains gas-based shaft kiln hydrogen-rich reducing gases；The work process of described electrolysis bath is, absorbs and has the absorbent of hydrogen sulfide to be passed through described electrolysis bath, retrieves absorbent after electrolysis bath processes, and the liquid inlet being passed through absorption tower is circulated use；The oxygen produced during electrolytic tank electrolysis is passed through the gas access of described gasification furnace, as the oxygen sources of gasifying agent.
(3) beneficial effect
System described in the utility model has the advantages that
1) by introducing electrolysis installation, the H that yield is controlled can be prepared2, gained H2H after mixing with coal gas, in scalable purified gas2/ CO ratio, obtains meeting gas-based shaft kiln and uses the reducing gases (H required2/CO≥0.7)。
2) system described in the utility model desulfuration efficiency in sweetening process is high, uses electrolytic regeneration absorbent method, can realize recycling of absorbent, to environment non-secondary pollution；And absorb and in regenerative process, the sulfur that obtains and hydrogen are the product that added value is higher.Additive method relatively, the hydrogen cost that this method obtains is the cheapest.Improve resource utilization, reduce operation cost.
3) system described in the utility model is during absorbent electrolytic regeneration, is also accompanied by part H2O oxidized generation by-product oxygen, this partial oxidation can serve as coal gasification gasifying agent, participates in coal gasification reaction, reduces air compression station load, reduces operation cost.
4) raw sorbent used by system described in the utility model is simple and easy to get, cheap, it is easy to accomplish the recycling in later stage, also can get elemental sulfur.
Accompanying drawing explanation
Fig. 1 is the system schematic of the clean gas-based shaft kiln reducing gases of coal gasification preparation；
In figure: 1, gasification furnace；2, quench chamber；3, absorption tower；4, subsider；5, electrolysis bath；6, cooling tower.
Detailed description of the invention
Following example are used for illustrating this utility model, but are not limited to scope of the present utility model.
Embodiment 1
The present embodiment relates to the system of the coal gasification described in the utility model clean gas-based shaft kiln reducing gases of preparation:
Including coal gasification unit, desulfurization unit and electrolysis installation；The gas outlet of described coal gasification unit is connected to the air inlet of described desulfurization unit, and the gas outlet of described desulfurization unit and the hydrogen outlet of described electrolysis installation are commonly connected to the admission line of gas-based shaft kiln reducing gases；
The liquid outlet of described desulfurization unit is connected to the inlet of described electrolysis installation, the inlet of the liquid outlet Opposite direction connection of described electrolysis installation to described desulfurization unit.
The oxygen outlet of described electrolysis installation is connected to the air inlet of described coal gasification unit.
Embodiment 2
The present embodiment relates to the system of the clean gas-based shaft kiln reducing gases of coal gasification described in the utility model preparation, its structural representation such as Fig. 1:
Compared with embodiment 1, its difference is,
Described electrolysis installation is electrolysis bath 5, and the anode material of described electrolysis bath is graphite electrode, and cathode material is platinum plating graphite electrode, and barrier film is cation exchange membrane.
Described desulfurization unit includes that absorption tower 3 and subsider 4, the tower body on described absorption tower 3 are provided with air inlet, gas outlet, inlet and liquid outlet, and described gas outlet is positioned at the top of inlet, and described inlet is positioned at the top of air inlet；
The top of described subsider 4 is provided with inlet and liquid outlet, and bottom is provided with elemental sulfur outlet；The liquid outlet on described absorption tower is connected to the inlet of described subsider, and the liquid outlet of described subsider is connected to the inlet of electrolysis bath 4.
Embodiment 3
The present embodiment relates to the system of the coal gasification described in the utility model clean gas-based shaft kiln reducing gases of preparation:
Compared with embodiment 2, its difference is, described coal gasification unit includes gasification furnace 1 and is positioned at the shock chamber 2 bottom described gasification furnace and cooling tower 6, and the top of described shock chamber is provided with cooling water inlet and gas outlet, and lower section is provided with lime-ash outlet；The down-comer of described gasification furnace 1 leads in the cooling chamber of described shock chamber 2；The gas outlet of described shock chamber is connected to described cooling tower 6, and the gas outlet of described cooling tower 6 is connected to the air inlet on described absorption tower 3.
Embodiment 4
The present embodiment relates to the use of the method that device described in the utility model prepares gas-based shaft kiln reducing gases, comprises the steps:
The present embodiment relates to the use of the method that the system described in embodiment 3 prepares gas-based shaft kiln reducing gases, comprises the steps:
1) feed coal carries out gasification reaction with gasifying agent after crushed, obtains raw gas；
Particle diameter after described coal is pulverized is 90 μm, and described gasifying agent is oxygen；
2) by described raw gas by absorbent, remove hydrogen sulfide therein, obtain purified gas；Described absorbent be pH value be the FeBr of 63With the mixed solution of HBr, the temperature that is passed through of described raw gas is 80 DEG C, and the speed that is passed through of described raw gas is 18m/s, and the spray rate of described absorbent is 4 × 103m3/h。
3) hydrogen that described purified gas is prepared with described electrolysis installation mixes, and obtains H2/ CO is the gas-based shaft kiln hydrogen-rich reducing gases of 2.0；Described electrolysis installation is electrolysis bath, and the electric current density of described electrolysis bath is 20mA/cm2；Absorbing has the absorbent of hydrogen sulfide to be passed through described electrolysis bath, retrieves absorbent, be circulated use after electrolysis bath processes；Also producing oxygen during electrolytic tank electrolysis, described oxygen is as the oxygen sources in gasifying agent.
In the present embodiment, H2The absorbance of S is 99%.
Although, to use general explanation, detailed description of the invention and test, this utility model has been made detailed description, but on the basis of this utility model, it can have been made some modifications or improvements, this will be apparent to those skilled in the art.Therefore, these modifications or improvements on the basis of without departing from this utility model spirit, belong to the scope that this utility model is claimed.
Claims (7)
1. the system of the clean gas-based shaft kiln reducing gases of coal gasification preparation, it is characterised in that include coal gasification unit, desulfurization unit and electrolysis installation；The gas outlet of described coal gasification unit is connected to the air inlet of described desulfurization unit, and the gas outlet of described desulfurization unit and the hydrogen outlet of described electrolysis installation are commonly connected to the admission line of gas-based shaft kiln reducing gases；
The liquid outlet of described desulfurization unit is connected to the inlet of described electrolysis installation, the inlet of the liquid outlet Opposite direction connection of described electrolysis installation to described desulfurization unit.
System the most according to claim 1, it is characterised in that the oxygen outlet of described electrolysis installation is connected to the air inlet of described coal gasification unit.
System the most according to claim 2, it is characterized in that, described desulfurization unit includes that absorption tower and subsider, the tower body on described absorption tower are provided with air inlet, gas outlet, inlet and liquid outlet, described gas outlet is positioned at the top of inlet, and described inlet is positioned at the top of air inlet；The top of described subsider is provided with inlet and liquid outlet, and bottom is provided with elemental sulfur outlet；The liquid outlet on described absorption tower is connected to the inlet of described subsider, and the liquid outlet of described subsider is connected to the inlet of electrolysis installation.
4. according to the system described in any one of claims 1 to 3, it is characterised in that described coal gasification unit includes gasification furnace and is positioned at the shock chamber bottom described gasification furnace and cooling tower；The down-comer of described gasification furnace leads in the cooling chamber of described shock chamber；The gas outlet of described shock chamber is connected with described cooling tower, and the gas outlet of described cooling tower is connected to the air inlet of described desulfurization unit.
System the most according to claim 4, it is characterised in that described gasification furnace is water-cooling wall airflow bed gasification furnace.
The most according to claim 1 or 5, system, it is characterised in that described electrolysis installation is electrolysis bath, the anode of described electrolysis bath selects graphite electrode or metal electrode；The material of described graphite electrode is graphite cake or carbon cloth, and the material of described metal electrode is lead, titanium, ruthenium or corrosion resistant metal alloy electrodes；Negative electrode is platinum electrode, platinum plating graphite electrode or stainless steel electrode；Described electrolysis bath is divided into anode chamber and cathode chamber, described barrier film to be ion exchange membrane by barrier film.
System the most according to claim 6, it is characterised in that the anode of described electrolysis bath selects graphite electrode；Negative electrode is platinum plating graphite electrode；Described electrolysis bath is divided into anode chamber and cathode chamber by cationic membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620298143.XU CN205635670U (en) | 2016-04-11 | 2016-04-11 | System for clean gas of coal gasification preparation base shaft furnace is crude gas still |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620298143.XU CN205635670U (en) | 2016-04-11 | 2016-04-11 | System for clean gas of coal gasification preparation base shaft furnace is crude gas still |
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| CN205635670U true CN205635670U (en) | 2016-10-12 |
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| CN201620298143.XU Active CN205635670U (en) | 2016-04-11 | 2016-04-11 | System for clean gas of coal gasification preparation base shaft furnace is crude gas still |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695655A (en) * | 2016-04-11 | 2016-06-22 | 北京神雾环境能源科技集团股份有限公司 | System and method for preparing clean gas base vertical furnace reducing gas through coal gasification |
-
2016
- 2016-04-11 CN CN201620298143.XU patent/CN205635670U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695655A (en) * | 2016-04-11 | 2016-06-22 | 北京神雾环境能源科技集团股份有限公司 | System and method for preparing clean gas base vertical furnace reducing gas through coal gasification |
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