CN107013201A - The method generated electricity using underground coal gasification(UCG) product gas - Google Patents
The method generated electricity using underground coal gasification(UCG) product gas Download PDFInfo
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- 238000002309 gasification Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 69
- 239000003245 coal Substances 0.000 title claims abstract description 55
- 230000005611 electricity Effects 0.000 title claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 138
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 78
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 76
- 239000000047 product Substances 0.000 claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 claims abstract description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 18
- 239000001301 oxygen Substances 0.000 claims abstract description 18
- 239000000446 fuel Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000005516 engineering process Methods 0.000 claims abstract description 13
- 239000006227 byproduct Substances 0.000 claims abstract description 12
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 239000002737 fuel gas Substances 0.000 claims abstract description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 31
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 27
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000002485 combustion reaction Methods 0.000 claims description 22
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 18
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 14
- 239000011280 coal tar Substances 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- 239000005864 Sulphur Substances 0.000 claims description 9
- 239000001569 carbon dioxide Substances 0.000 claims description 9
- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Chemical compound CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 229910052717 sulfur Inorganic materials 0.000 claims description 8
- 239000011593 sulfur Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 238000006477 desulfuration reaction Methods 0.000 claims description 5
- 230000023556 desulfurization Effects 0.000 claims description 5
- 230000007062 hydrolysis Effects 0.000 claims description 5
- 238000006460 hydrolysis reaction Methods 0.000 claims description 5
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000006071 cream Substances 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 3
- 238000004807 desolvation Methods 0.000 claims description 3
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 3
- 229940043279 diisopropylamine Drugs 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 5
- 230000001590 oxidative effect Effects 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 239000002956 ash Substances 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011286 gas tar Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/006—Hydrogen cyanide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/16—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/34—Purifying combustible gases containing carbon monoxide by catalytic conversion of impurities to more readily removable materials
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/04—Liquid carbonaceous fuels essentially based on blends of hydrocarbons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
- F02C3/22—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being gaseous at standard temperature and pressure
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Industrial Gases (AREA)
Abstract
The present invention relates to a kind of method that utilization underground coal gasification(UCG) product gas generates electricity, step is as follows：（1）The crude synthesis gas that multiple underground gasification furnace or gasification furnace groups pass through air gasification, oxygen-rich gasification or the appropriate economic scale of pure oxygen gasification technique productions；（2）Crude synthesis gas is delivered to ground by product well, and enters crude synthesis gas cooling, washing and separative element, obtains dry synthesis gas；（3）Dry synthesis gas is fed directly to fuel element and the generator unit of its mechanical couplings carries out fuel gas generation, produces electric power.The method that the utilization underground coal gasification(UCG) product gas that the present invention is provided generates electricity, makes full use of the principal by product in coal underground gasifying technology to extend downstream finished product scope, reduces the cost of post-production processing and discharge.
Description
Technical field
The present invention relates to a kind of method that utilization underground coal gasification(UCG) product gas generates electricity, belong to underground coal gasification(UCG) product gas
Technical field of comprehensive utilization.
Background technology
Underground coal gasification(UCG)（ISC）Be one by oxidant, burning and gasification reaction by subterranean coal are straight coal
Switch through the process for turning to product gas.Product gas is commonly known as synthesis gas, can be used as fuel production, Chemical Manufacture, generating etc.
The raw material of downstream process.The technical process set shaft building completion, underground coal mining and coal gasification process technology, with security
Well, the advantages of investing small, high efficiency, pollution less.
Coal gasification process is the process that coal is changed into synthesis gas by a series of chemical reaction.It is wherein main
Reaction includes：
C+H20 → H2+CO（Steam gasification reacts）
CO+H20 ↔ H2+CO2（Water gas shift reaction）
CO+3H2↔ CH4+H20 （Methanation reaction）
C+2H2 → CH4（Hydrogen gasification reaction）
C+½O2→ CO （Partial oxidation reaction）
C+O2 → CO2（Complete oxidation）
C+CO2→ 2CO（Carbon dioxide gasification reacts）
One drilling well for being used for oxidant injection is referred to as " injection well ", and another drilling well for being used to produce product gas is referred to as " production
Product well ".Directed drilling and vertical drilling can all be used as injection well or product well.Underground coal gasification(UCG)（ISC）May be in injection well
Also need to use one or more peupendicular holes between product well（For example：Functional well and service well）.
When having injection well, product well and horizontal channel to connect the two in coal seam, this construction is referred to as a coal
Charcoal underground gasification（ISC）Unit or well pair.ISC units include combustion zone, gasification zone and pyrolysis zone.Wherein, combustion zone is in coal seam
Near middle oxidant decanting point；Gasification zone is centered around around combustion zone with radial form or in combustion zone downstream, and coal exists
Gasification zone is gasified, part is oxidized, so as to generate product gas；Pyrolysis zone typically exists in gasification zone downstream, the pyrolytic reaction of coal
Here occur.The product gas of high temperature is finally transported to ground from gasification zone toward downstream flow from product well well head.In coal combustion
Or while gasification, it is big that the ISC burned out area in coal seam can grow change.
The product gas generated by underground coal gasification(UCG)（Crude synthesis gas）Usually contain synthesis gas（CO、CO2、H2、CH4And its
The mixture of his gas）And other compositions（Solid particle, water, coal tar, hydrocarbon vapours, other microcomponents include H2S、
NH4, COS etc.）.Its complicated component degree depends on many aspects：Oxidant used in underground coal gasification(UCG)（Air or other
Oxidant, such as oxygen, oxygen-enriched air or vapour mixture）, inherent water in coal seam or surrounding formations penetrate into coal seam water,
The operating parameter of ature of coal and coal underground gasifying technology, including temperature, pressure etc..
According to existing patent document, the comprehensive utilization of current underground coal gasification(UCG) product gas is still faced with many problems,
It is specific as follows：
A) small-scale air gasification synthesis gas power generating demonstration project is removed（Including the direct generation of electricity and mix burning generate electricity）Outside, lack extensive
Industrialize project implementation and operation.
B) all kinds of byproducts of underground coal gasification(UCG) production, such as hydrogen sulfide/sulphur, process water, carbon dioxide, coal tar
Oil etc. reduces or removed these byproducts without clear and definite and ripe industrialization method of comprehensive utilization or technique.
C) the technological process side of downstream syngas and byproduct the coal tar generating for coal underground gasifying technology is lacked
Case.
D) air gasification, three kinds of different process of oxygen-rich gasification and pure oxygen gasification in coal underground gasifying technology are produced
Synthesis gas product quality difference it is larger, directly affect processing condition and method downstream, it is impossible to lump together.
The content of the invention
It is an object of the invention to solve the deficiencies in the prior art to generate electricity using underground coal gasification(UCG) product gas there is provided one kind
Method.The method that the utilization underground coal gasification(UCG) product gas that the present invention is provided generates electricity, makes full use of coal underground gasifying technology
In principal by product extension downstream finished product scope, not only reduce post-production processing and discharge cost, also add
Project Product yield and income from sales.
The technical solution adopted for the present invention to solve the technical problems is：
The method generated electricity using underground coal gasification(UCG) product gas, methods described is comprised the following steps：
（1）Multiple underground gasification furnaces or gasification furnace group are thick by oxygen-rich gasification or the appropriate economic scale of pure oxygen gasification technique productions
Synthesis gas；
（2）Crude synthesis gas is delivered to ground by product well, and enters crude synthesis gas cooling, washing and separative element, is done
Synthesis gas, the dry synthesis gas includes H2、CO、CO2、CH4、H2S, COS and HCN composition；
（3）Dry synthesis gas is fed directly to fuel element and the generator unit of its mechanical couplings carries out fuel gas generation, produces electric power.
It is preferred that, step（2）The direct cooling technique that the middle step of use cooling water washing one is carried out, or use cooling water washing two
Walk the indirect cooling technique carried out.
It is preferred that, the fuel element uses reciprocating engine or gas turbine or boiler, when using reciprocating engine
During machine, dry synthesis gas carries out reduced pressure treatment in advance.
It is preferred that, step（3）Dry synthesis gas is delivered to desulfurization unit, wherein the COS and HCN in dry synthesis gas pass through catalysis
Hydrolysis unit is converted into H2S and NH3, then by using diisopropylamine（DIPAM）Or diethylamine（DETA）Select adsorbing and removing
H2S, hydrogen sulfide delivers to sulfur cream cellular manufacture sulphur, afterwards by syngas combustion unit, driving generator unit production electricity
Power.
It is preferred that, step（2）Dry synthesis gas, is firstly transferred to acid gas removal cell processing, and the sour gas takes off
Except the porch of unit includes COS hydrolysis units, COS in synthesis gas and HCN are changed into H2S and NH3, acid gas removal list
Member uses counter-current gas absorption process, absorbs the sour gas in synthesis gas using renewable solvent in absorption tower, is met
Downstream synthesis technique requires H2S contents<1ppmv dry synthesis gas.
It is preferred that, step（2）It is molten with the physics of SELEXOL techniques that middle acid gas removal unit uses low-temp methanol to wash
Agent adsorption technology, the solvent rich in sour gas for leaving absorption tower bottom is sent in regeneration reactor, passes through low-pressure steam
Strip the H that desolvation absorbs2S, then converts it into sulphur, is handled by multi-step pressure reduction and nitrogen stripping, will be with H2S mono-
Absorbed carbon dioxide is played to remove from solvent.
It is preferred that, byproduct coal tar can produce high steam as boiler oil, and be produced by steam turbine unit
Additional power.The high-temp combustion tail gas that boiler feedwater is discharged by Waste Heat Recovery steam production unit and fuel element carries out hot friendship
Change production steam.The condensed water that steam turbine unit is produced is recycled.
The beneficial effects of the invention are as follows：The method that the utilization underground coal gasification(UCG) product gas that the present invention is provided generates electricity, fully
Using in coal underground gasifying technology principal by product extend downstream finished product scope, not only reduce post-production processing and
The cost of discharge, also add Project Product yield and income from sales.
Brief description of the drawings
Retouched to more clearly describe the accompanying drawing used required in the technology flow of the present invention, specific embodiment
State as follows.It should be evident that drawings in the following description are only some embodiments of the present invention, for the common skill in this area
For art personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the square process chart that underground coal gasification(UCG) air gasification product gas generates electricity, scheme one；
Fig. 2 is the square process chart that underground coal gasification(UCG) air gasification product gas generates electricity, scheme two；
Fig. 3 is the square process chart that underground coal gasification(UCG) oxygen-rich gasification product gas generates electricity；
Fig. 4 is the square process chart that underground coal gasification(UCG) pure oxygen gasification product gas generates electricity.
In the accompanying drawings, identical reference refers to same parts.
1st, air-separating plant（ASU）；2nd, oxygen；3rd, nitrogen；4th, ISC underground gasification furnaces；5th, crude synthesis gas；6th, thick synthesis
Air cooling, washing and separative element；7th, dry synthesis gas；8th, process water；9th, technique unit for treating water；10th, raw water；11st, Waste
Material；12nd, the process water of processing；13rd, gasify unit for treating water；14th, gasified water；15th, coal tar；16th, coal tar processing unit；
17th, the coal tar of processing；18th, acid gas removal（AGR）Unit；19th, carbon dioxide；20th, sulfur cream unit；21st, sulphur；
22nd, boiler；23rd, steam；24th, desulfurization unit；25th, hydrogen sulfide；26th, air compressor；27th, compressed air；28th, burn single
Member；29th, high-temp combustion tail gas；30th, generator unit；31st, electric power；32nd, Waste Heat Recovery steam production unit；33rd, combustion tail gas；
34th, steam turbine unit；35th, condensed water；36th, oxygen-enriched air.
Embodiment
Below by specific embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
In one embodiment, generated electricity using underground coal gasification(UCG) product gas.For containing with ultra-low sulfur, chlorine
The high heating value of amount, phosphorus content and content of beary metal（LHV>24MJ/kg）Coal seam, dry synthesis gas 7, can be direct without extra processing
Generated electricity（Fig. 1）.The technique can use air gasification, oxygen-rich gasification or pure oxygen gasification.The synthesis gas of air gasification production
Calorific value is relatively low, 4-6MJ/Nm3；The flow rate of pure oxygen gasification production is higher, 10-12MJ/Nm3.Its main distinction is in synthesis gas
Interior inert component N2Content, N in air gasification synthesis gas2Content may be up to 50mole%, and N in pure oxygen gasification synthesis gas2Contain
Amount is less than 1mole%.For rich in coal bed gas（Methane）Coal seam, methane content and calorific value will increased in synthesis gas.Such as
Shown in Fig. 1, air gasification is injected into ISC underground gasification furnaces 4 using the production of air compressor 26 compressed air 26.Crude synthesis gas 5
Ground is delivered to by product well, and enters crude synthesis gas cooling, washing and separative element 6.Crude synthesis gas 5 is by directly cooling down
Technique（Liquid or gas cooling, Venturi, cooling tower etc.）Or indirect cooling technique（Blade fan, heat exchanger etc.）It hurry up
Speed is cooled to<150oC.Wherein, direct cooling technique contains the step of crude synthesis gas is washed, and cooling technique then needs indirectly
At least one scrubbing tower is by the trace contaminant in crude synthesis gas（Particulate matter, chloride, mercury, ammonia etc.）Moved from crude synthesis gas
Remove.Synthesis gas after washing removes the free fluid remained in synthesis gas, the dry synthesis of generation subsequently into gas-liquid separator
Gas 7.Dry synthesis gas 7 is fed directly to fuel element 28 and the generator unit 30 of its mechanical couplings carries out fuel gas generation, production electricity
Power 31.The high-temp combustion tail gas 29 emitted from fuel element 28 has to comply with the discharge standard of environmental requirement.According to sky
Gas gasifies, N2（Up to 50mole%）Substantial amounts of NO will be produced after burningxDischarge, therefore oxygen-rich gasification or pure oxygen gasification are more favourable
Required in meeting environmental protection and low emission.If fuel element 28 uses reciprocating engine（Internal combustion engine）, combustion process by heat energy turn
Mechanical energy is turned to, and drives generator unit 30 to produce electric power.Reciprocating engine is quite durable, scaleable（Single-machine capacity
100kW-10MW, based on natural gas feed）, and Parallel sets item controlled scale can be passed through.Then reciprocating engine
Feed gas pressure requirement is close to environmental pressure, and dry synthesis gas 7 needs to carry out reduced pressure treatment.If fuel element 28 uses combustion gas
Turbine, the then high pressure that ISC underground gasification furnaces 4 are exported aids in determining whether turbine.The monovalent capacity 4MW- of typical case of gas turbine
425+MW, is more suitable for extensive power generation project.For gas turbine, the flow rate of air gasification production be in its it is minimum will
Ask, more suitable for oxygen-rich gasification and the synthesis gas of pure oxygen gasification.Can also be from boiler as fuel element 28, production high pressure is steamed
Generator unit 30 is driven by steam turbine after vapour, electric power 31 is produced.The process water of all production processes（Fig. 1 is not indicated）, lead to
Technique water treatment plant can be sent to as make-up water by crossing after condensation is reclaimed, substitution or the reduction consumption of raw water 10.
In another embodiment, by being purified and being handled to synthesis gas, underground coal gasification(UCG) product gas is improved
Coal seam of the adaptability of electrification technique so as to fit high sulfur content.As shown in Fig. 2 dry synthesis gas 7 is delivered to desulfurization unit 24,
COS and HCN wherein in synthesis gas 7 are converted into H by catalyzing hydrolysis unit2S and NH3.Then by using diisopropylamine
（DIPAM）Or diethylamine（DETA）Select adsorbing and removing H2S.Synthesis gas sulfur content after desulfurization is extremely low（H2S<
0.1ppmv）, key component is CO2, CH4, H2And CO.Hydrogen sulfide 25 delivers to the production sulphur 21 of sulfur cream unit 20.Lead to afterwards
Cross syngas combustion unit 28, the driving production electric power 31 of generator unit 30.Boiler feedwater uses gasified water 14, passes through Waste Heat Recovery
Steam production unit 32 carries out heat exchange production steam with the high-temp combustion tail gas 29 that fuel element 28 is discharged.The conduct of coal tar 17
Fuel is used for the production high steam 23 of heating boiler 22 and discharge combustion tail gas 33.Coal tar calorific value can typically reach 34-
38MJ/kg, can be with diesel oil calorific value（44MJ/kg）Match in excellence or beauty.High steam 23 drives generator unit by steam turbine unit 34
30 to produce electric power 31.The condensed water 35 that steam turbine unit 34 is produced is reclaimed and is delivered at gasification unit for treating water 13
Manage and recycle.
In another embodiment, by increasing air-separating plant（ASU）1 production high-purity oxygen 2（And accessory substance
Nitrogen 3）To implement oxygen-rich gasification, improve flow rate to meet gas turbine operation requirement（Fig. 3）.Other technological process classes
Like Fig. 2 air elelctrochemical power generation technique.
In another embodiment, using pure oxygen gasification（>96%, preferably>98.5%）Technique（Fig. 4）.With higher
Calorific value（LHV, 10-12MJ/Nm3）Dry synthesis gas 7, be firstly transferred to acid gas removal（AGR）Unit 18 is handled.The flow
COS hydrolysis units will be included in the porch of acid gas removal unit 18（Fig. 4 is not marked）, COS in synthesis gas and HCN is turned
It is melted into H2S and NH3.The unit uses counter-current gas absorption process, and the acid in synthesis gas is absorbed using renewable solvent in absorption tower
Property gas（H2S and CO2）, obtain and meet downstream synthesis technique requirement H2S contents<1ppmv synthesis gas, preferably H2S contents<
0.1ppmv.The technology that the unit is used is that low-temp methanol washes physical solvent adsorption technology with SELEXOL techniques.Leave suction
The solvent rich in sour gas for receiving tower bottom is sent in regeneration reactor, strips what desolvation absorbed by low-pressure steam
H2S, then converts it into sulphur 21.Handled by multi-step pressure reduction and nitrogen stripping, can by with H2S absorbed dioxies together
Change carbon 19 to remove from solvent.By acid gas removal（AGR）The synthesis gas hardly sulfur-bearing of the processing of unit 18, containing a small amount of
CO2, only leave H2, CO and CH4Key component.The Lower heat value of the synthesis gas（LHV）For 17-20MJ/Nm3.Synthesis gas afterwards
Fuel element 28 is delivered to, is burnt using oxygen 2, the driving production electric power 31 of generator unit 30.Similar waste heat recovery flow side
Case is as described above（Fig. 2）, boiler feedwater use gasified water 14, pass through Waste Heat Recovery steam production unit 32 and the row of fuel element 28
The high-temp combustion tail gas 29 put carries out heat exchange production steam.Coal tar 17 is burnt for heating kettle as fuel using oxygen 2
Stove 22 produces high steam 23.High steam 23 drives generator unit 30 to produce electric power 31 by steam turbine unit 34.Adopt
With synthesis gas and coal tar oxygen combustion process, N will not be introduced2, can avoid forming NO in combustion tail gas 33xDischarge.
By implementing the technological process, power generation is not in coal ash, solid pollutant discharge, SOxAnd NOxDischarge and
Environmental issue.Most ash contents and solid impurity are remained in the burned out area of ISC underground gasification furnaces 4, micro- in crude synthesis gas
The ash content and solid impurity of amount are reached and are removed after product well well head in crude synthesis gas cooling, washing and separative element 6.Afterwards
Sulphur in synthesis gas is in acid gas removal（AGR）It is removed in unit 18.Whole technical process uses oxygen combustion, does not introduce
N2, it is to avoid formation forms NO in combustion tail gasx.Unique discharge of whole technical process is acid gas removal process and burning
The carbon dioxide 19 of process is discharged.If increasing decarburization unit in technical process, the carbon dioxide 19 of removing is given birth to available for fertilizer
Production, carbon dioxide drive（EOR）Or technical grade and food-grade carbon-dioxide sale are further used as after purification.
Embodiment described above is a kind of preferably scheme of the present invention, not makees any formal to the present invention
Limitation, also has other variants and remodeling on the premise of without departing from the technical scheme described in claim.
Claims (7)
1. the method generated electricity using underground coal gasification(UCG) product gas, it is characterised in that：Methods described comprises the following steps：
（1）Multiple underground gasification furnace or gasification furnace groups are suitably passed through by air gasification, oxygen-rich gasification or pure oxygen gasification technique productions
The crude synthesis gas of Ji scale；
（2）Crude synthesis gas is delivered to ground by product well, and enters crude synthesis gas cooling, washing and separative element, is done
Synthesis gas, the dry synthesis gas includes H2、CO、CO2、CH4、H2S, COS and HCN composition；
（3）Dry synthesis gas is fed directly to fuel element and the generator unit of its mechanical couplings carries out fuel gas generation, produces electric power.
2. the method that utilization underground coal gasification(UCG) product gas according to claim 1 generates electricity, it is characterised in that：Step（2）
The direct cooling technique that the middle step of use cooling water washing one is carried out, or the indirect cooling technique carried out using the step of cooling water washing two.
3. the method that utilization underground coal gasification(UCG) product gas according to claim 1 generates electricity, it is characterised in that：The burning
Unit uses reciprocating engine or gas turbine or boiler, and when using reciprocating engine, dry synthesis gas is subtracted in advance
Pressure processing.
4. the method that utilization underground coal gasification(UCG) product gas according to claim 1 generates electricity, it is characterised in that：Step（3）
Dry synthesis gas is delivered to desulfurization unit, wherein the COS and HCN in dry synthesis gas are converted into H by catalyzing hydrolysis unit2S and NH3,
Then by using diisopropylamine（DIPAM）Or diethylamine（DETA）Select adsorbing and removing H2S, hydrogen sulfide delivers to sulfur cream list
Member production sulphur, afterwards by syngas combustion unit, driving generator unit production electric power.
5. the method that utilization underground coal gasification(UCG) product gas according to claim 1 generates electricity, it is characterised in that：Step（2）
Dry synthesis gas, is firstly transferred to acid gas removal cell processing, and the porch of the acid gas removal unit includes COS water
Unit is solved, COS in synthesis gas and HCN are changed into H2S and NH3, acid gas removal unit use counter-current gas absorption process,
The sour gas in synthesis gas is absorbed using renewable solvent in absorption tower, acquisition meets downstream synthesis technique requirement H2S contents<
1ppmv dry synthesis gas.
6. the method that utilization underground coal gasification(UCG) product gas according to claim 5 generates electricity, it is characterised in that：Step（2）
Middle acid gas removal unit uses low-temp methanol to wash the physical solvent adsorption technology with SELEXOL techniques, leaves absorption tower
The solvent rich in sour gas of bottom is sent in regeneration reactor, and the H that desolvation absorbs is stripped by low-pressure steam2S,
Then sulphur is converted it into, is handled by multi-step pressure reduction and nitrogen stripping, will be with H2S together absorbed carbon dioxide from molten
Removed in agent.
7. the method that utilization underground coal gasification(UCG) product gas according to claim 1 generates electricity, it is characterised in that：Byproduct coal
Tar can produce high steam as boiler oil, and produce additional power by steam turbine unit, and boiler feedwater passes through useless
Heat recovery steam production unit carries out heat exchange production steam, steam turbine unit with the high-temp combustion tail gas that fuel element is discharged
The condensed water of generation is recycled.
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| CN109138952A (en) * | 2018-10-29 | 2019-01-04 | 邓晓亮 | A kind of system and method for overcritical underground coal gasification(UCG) output power generation |
| CN111655825A (en) * | 2018-03-14 | 2020-09-11 | 三菱重工工程株式会社 | Gas refining device |
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