CN106223925A - Auxiliary raw materials for production feed process for coal underground gasifying technology - Google Patents
Auxiliary raw materials for production feed process for coal underground gasifying technology Download PDFInfo
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- CN106223925A CN106223925A CN201610712795.8A CN201610712795A CN106223925A CN 106223925 A CN106223925 A CN 106223925A CN 201610712795 A CN201610712795 A CN 201610712795A CN 106223925 A CN106223925 A CN 106223925A
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- 239000003245 coal Substances 0.000 title claims abstract description 142
- 239000002994 raw material Substances 0.000 title claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 42
- 238000005516 engineering process Methods 0.000 title claims abstract description 28
- 238000012546 transfer Methods 0.000 claims abstract description 133
- 238000002309 gasification Methods 0.000 claims abstract description 90
- 239000003054 catalyst Substances 0.000 claims abstract description 55
- 238000002347 injection Methods 0.000 claims abstract description 43
- 239000007924 injection Substances 0.000 claims abstract description 43
- 239000000376 reactant Substances 0.000 claims abstract description 29
- 239000000654 additive Substances 0.000 claims abstract description 28
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- 239000007800 oxidant agent Substances 0.000 claims abstract description 25
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 21
- 238000010926 purge Methods 0.000 claims abstract description 19
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- 230000015572 biosynthetic process Effects 0.000 claims description 64
- 238000003786 synthesis reaction Methods 0.000 claims description 63
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 21
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 18
- 239000011280 coal tar Substances 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 11
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- 229930195733 hydrocarbon Natural products 0.000 description 10
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000001569 carbon dioxide Substances 0.000 description 6
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- 239000002253 acid Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- -1 corrosion inhibiter Substances 0.000 description 3
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- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 3
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 3
- 229910052756 noble gas Inorganic materials 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
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- 239000007787 solid Substances 0.000 description 3
- 239000011269 tar Substances 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910020630 Co Ni Inorganic materials 0.000 description 2
- 229910002440 Co–Ni Inorganic materials 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
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- 150000001413 amino acids Chemical class 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- NVIVJPRCKQTWLY-UHFFFAOYSA-N cobalt nickel Chemical compound [Co][Ni][Co] NVIVJPRCKQTWLY-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
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- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
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- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
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- 238000012216 screening Methods 0.000 description 2
- 229910052712 strontium Inorganic materials 0.000 description 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 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
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
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- 230000002411 adverse Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- RRTCFFFUTAGOSG-UHFFFAOYSA-N benzene;phenol Chemical compound C1=CC=CC=C1.OC1=CC=CC=C1 RRTCFFFUTAGOSG-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process 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
- 239000003034 coal gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
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- 229910001873 dinitrogen Inorganic materials 0.000 description 1
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- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- 235000012239 silicon dioxide Nutrition 0.000 description 1
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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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Industrial Gases (AREA)
Abstract
The present invention relates to a kind of for coal underground gasifying technology (ISC) auxiliary raw materials for production feed process, wherein a scheme is as follows: by the first transfer passage a, from ground the first transfer passage a port, catalyst, reactant, additive and purging medium are delivered directly to high-temperature gasification district and combustion zone；The auxiliary raw materials for production being carried secretly injection by current will be needed to be transported to high-temperature gasification district and combustion zone by the second transfer passage a port of the second transfer passage a；First transfer passage a is to inject casing and the circular passage injecting into well between bushing pipe of concentric setting, second transfer passage a is to inject into well the circular passage between bushing pipe and coiled tubing oxidant injection device, and the second transfer passage a isolates until entering high-temperature gasification district and combustion zone with coal seam completely.Catalyst, purging medium and pre-thermal medium can be transported to reaction zones different in underground gasification furnace and humidity province by technological requirement by this feed process, it is achieved improve the purpose of processing performance.
Description
Technical field
The present invention relates to a kind of method assisting raw materials for production to feed, more particularly to one for underground coal gasification(UCG)
The feed process of technique (ISC) auxiliary raw materials for production charging.
Background technology
Underground coal gasification(UCG) (ISC) be one by oxidant, by burning and the gasification reaction of subterranean coal, coal is straight
Switch through the process turning to product gas.Product gas is commonly called synthesis gas, can be as fuel production, Chemical Manufacture, generating etc.
The raw material of downstream process.This technical process set shaft building completion, underground coal mining and coal gasification process technology, have safety
Good, invest the advantages such as little, high efficiency, pollution are few.
Coal gasification process is the process that coal is changed into synthesis gas by a series of chemical reaction.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 injected for oxidant is referred to as " injection well ", and another one is referred to as " producing for the drilling well producing product gas
Product well ".Directed drilling and vertical drilling all can be as injecting well or product well.Underground coal gasification(UCG) (ISC) may inject well
And also need between product well use one or more peupendicular holes (such as: functional well and service well).
When having injection well, product well and horizontal channel the two to be coupled together in coal seam, this structure is referred to as a coal
Charcoal underground gasification (ISC) unit or well pair.ISC unit includes 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 at combustion zone downstream, coal exists
Gasified in gasification zone, part is oxidized, thus generates product gas；Pyrolysis zone is in downstream, gasification zone, and the pyrolytic reaction of coal typically exists
Here occur.The product gas of high temperature toward downstream flow, and is finally transported to ground from product well well head from gasification zone.At coal combustion
Or while gasification, it is big that the ISC burned out area in coal seam can grow change.
The product gas (crude synthesis gas) generated by underground coal gasification(UCG) usually contains synthesis gas (CO, CO2、H2、CH4And
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 that underground coal gasification(UCG) is used (air or other
Oxidant, such as oxygen, oxygen-enriched air or vapour mixture), inherent water in coal seam or surrounding formations penetrate into the water in coal seam,
Ature of coal and the operating parameter of coal underground gasifying technology, including temperature, pressure etc..
The Main Bottleneck of coal underground gasification technology is efficiency and the degradation of gasifying process in running and makes
The defective synthesis gas product become and equipment fault or damage.According to existing patent documentation, the concrete technology faced at present is asked
Topic includes:
(1) ature of coal problem causes synthesis gas second-rate, or the synthesis gas yield that girdle or high ash cause is not enough, final decline
The economic benefit of low coal underground gasifying technology；
(2) acid compound (example hydrochloric acid, sulphuric acid etc.) that in coal seam, sulfur and chlorine element are formed under reduction and wet environment causes
To well integrity and the corrosion of ground installation；
(3) substantial amounts of tar and Colophonium cause the blocking of product well and surface duct.Stopping state usually occurs in ignition process
During rear or underrun.When the temperature of well is relatively low or is less than freezing point when surface duct ambient temperature, blockage problem
By more acute；
(4) when injecting remaining oxidizing agent in well soft air passage, surprisingly burn along soft air passage in coal seam.Maybe work as product
In product well soft air passage after remaining oxidizing agent and synthesis gas Product mix, cause the unexpected fuel of product well or upstream device
Or blast；
(5) product well is long for preheating time, causes higher exhaust emissions amount and the loss of synthesis gas product.
Summary of the invention
It is an object of the invention to solve the deficiencies in the prior art, it is provided that a kind of for coal underground gasifying technology (ISC)
Auxiliary raw materials for production feed process.Can be by catalyst, reactant, additive, purging medium and pre-heating agent by this feed process
It is situated between and is transported to different reaction zones and humidity province in underground gasification furnace (ISC well to) by technological requirement, it is achieved optimize and improve it
The purpose of processing performance.
The technical solution adopted for the present invention to solve the technical problems is:
The present invention solves the first technical scheme of its technical problem, for coal underground gasifying technology auxiliary raw materials for production charging
System, orientation based on underground coal gasification(UCG) unit is injected well, is oriented injection well and include vertical section, segmental arc and horizontal segment, institute
State feed system and include following assembly:
What injection casing and concentric were arranged injects into well bushing pipe, injects casing and includes vertical section and segmental arc, injects well
Internal lining pipe includes vertical section, segmental arc and horizontal segment；
Inject casing and inject into well the circular passage between bushing pipe as the first transfer passage a, inside the first transfer passage a
It is provided with underground instrumentation, injects into well and inside bushing pipe, be provided with coiled tubing oxidant injection device, inject into well bushing pipe and company
Circular passage between continuous oil pipe oxidant injection device is the second transfer passage a, and the second transfer passage a isolates with coal seam completely
Until entering high-temperature gasification district (this regional temperature is higher than 550 DEG C) and combustion zone, the second transfer passage a is used for injecting gasifying process
Water and need to be carried secretly the auxiliary raw materials for production of injection by current.
The feed process of this technical scheme is as follows: and blown catalyst, reactant, additive by the first transfer passage a
Sweep medium and be delivered directly to high-temperature gasification district and combustion zone from ground the first transfer passage a port；By the second transfer passage a's
Second transfer passage a port is transported to high-temperature gasification district and burning by needing the auxiliary raw materials for production being carried secretly injection by current
District.
Auxiliary raw materials for production can be effectively communicated to underground coal gasification(UCG) (ISC) high temperature reaction zone (i.e. by this technical scheme
High-temperature gasification district and combustion zone), wherein auxiliary raw materials for production include:
Reactant: solid hydrocarbon particulates (through pulverizing, grind, screening), liquid hydrocarbon, gas nytron
Thing or product water (low fouling, middle low-corrosiveness).
Catalyst: be used for improving gasification efficiency and synthesis gas quality, producing for coal tar heavy duty rectification property and reduction coal tar
Powder solid phase, liquid phase or the gas phase catalyst of rate.
Additive: for preventing or reduce the corrosion in catalyst and reactant course of conveying and fouling.
The mixture of catalyst, reactant and additive can be simultaneously injected into high temperature reaction zone by same transfer passage
Territory, reaches to optimize and improve the purpose of coal underground gasifying technology performance.
Purging medium such as nitrogen is injected into the first transfer passage a, it is ensured that the most unexpected coal combustion region, this region
It is in inert gas shielding.Similarly, carbon dioxide, water or steam are also injected into the first transfer passage a to replace this district
In territory, to protect the coal seam of rear end, reaction zone, (gasification reaction needs temperature to be higher than 550 to the oxidant of remainingoC).
Auxiliary raw materials for production can be by injecting casing and circular passage (the first transfer passage injected into well between bushing pipe
A vertical section) and inject well and the circular passage (the first transfer passage a horizontal segment) that injects into well between bushing pipe is transported to the ground therapeutic method to keep the adverse QI flowing downwards
Change the high temperature reaction zone (> 550 of stove (ISC well to)oC).
Auxiliary raw materials for production are also by circular passage (the second transfer passage injected into well between bushing pipe and coiled tubing
A) high temperature reaction zone (> 550 of underground gasification furnace (ISC well to) it is transported tooC).
The present invention solves the second technical scheme of its technical problem, and the auxiliary for coal underground gasifying technology produces former
Material feed system, vertical product well based on underground coal gasification(UCG) unit, described feed system includes following assembly: product pipe and
Product casing, circular passage therebetween is the first transfer passage b, and product pipe includes that complete product pipe pipeline section and perforate are produced
QC pipeline section, is provided with underground instrumentation inside the first transfer passage b, and in vertical product bottom, product casing arrives coal
Layer vertical drilling top terminates, and intersects with coal seam vertical drilling and is provided with injection well perforate internal lining pipe, and complete product pipe pipeline section terminates in
Top, coal seam, perforate product pipe pipeline section starts from top, coal seam, under maximum heat stretches situation, product pipe and injection well perforate internal lining pipe
Between distance more than zero；
Described feed system also includes the parallel water cooling tube be located at product pipe side and be positioned at product casing, and water cooling tube is only provided with
Returning valve and nozzle, water cooling tube is until in the vertical drilling of coal seam, water cooling tube length exceedes perforate product pipe pipeline section end, and water cooling tube is made
It is the second transfer passage b, needs to be carried secretly by current the auxiliary raw materials for production of injection for conveying.
The feed process of this technical scheme is as follows: driving ignition phase, will purge medium with pre-by the first transfer passage b
Thermal medium is delivered directly in the vertical drilling of coal seam from ground the first transfer passage b port, by perforate product pipe pipeline section, preheating
Medium circulates between the first transfer passage b and product pipe, improves whole product well temperature；
Under normal operation, by the first transfer passage b by catalyst, reactant and additive from ground the first transfer passage
B port is delivered directly in the vertical drilling of coal seam, is passed through by needs by the second transfer passage b port of the second transfer passage b
Current are carried the auxiliary raw materials for production of injection secretly and are transported in the vertical drilling of coal seam, and the auxiliary raw materials for production of all inputs are all in coal seam
In vertical drilling, synthesis gas quenching district and crude synthesis gas are fully contacted and react, and are produced by perforate along with crude synthesis gas stream afterwards
QC pipeline section enters product pipe, and is entrained to floor outlet by crude synthesis gas stream.
In this technical scheme, by vertical product well, auxiliary raw materials for production can be effectively communicated to underground coal gasification(UCG)
(ISC) cryogenic reaction zone, wherein auxiliary raw materials for production include:
Catalyst: for changing powder solid phase, liquid phase or the gas phase catalyst of synthesis gas components.
Additive: for product well anticorrosion, good antiscale property, blockage resisting and coal tar and product water close in pipeline can be reduced
Degree, viscosity and the additive of freezing point.
The mixture of catalyst, reactant and additive can be simultaneously injected into cryogenic reaction zone by same transfer passage
Territory, reaches to optimize and improve the purpose of coal underground gasifying technology performance.
Purging medium such as nitrogen or carbon dioxide are injected into the first transfer passage b, it is ensured that this region is in noble gas
Non-explosive admixture of gas (synthesis gas and oxidant) in protection.
Pre-thermal medium such as air or nitrogen etc., for being preheated by product casing before ignition process, shorten ignition process
Transit time to normal course of operation.After this medium can be by ground level heat switch or heating devices heat, circulation is injected
In product well.Or, the hot synthesis gas that neighbouring operating underground gasification furnace produces also can be injected into this product as pre-thermal medium
Product well.
Auxiliary raw materials for production can be transported to underground gasification furnace by the circular passage between product casing and product pipe
The coal seam vertical drilling of (ISC well to), i.e. cryogenic reaction zone (< 350oC).
The coal seam that auxiliary raw materials for production are delivered directly to underground gasification furnace (ISC well to) also by water cooling tube is vertically bored
Hole, i.e. cryogenic reaction zone (< 350oC).
The third technical scheme that the present invention solves its technical problem is as follows:
For the auxiliary raw materials for production feed system of coal underground gasifying technology, confined goods based on underground coal gasification(UCG) unit
Well, confined goods well includes that vertical section, segmental arc and horizontal segment, described feed system include following assembly:
The product casing arranged including concentric and product pipe, circular passage therebetween is the first transfer passage b, first
It is provided with underground instrumentation, product casing and product pipe inside transfer passage b to extend in the horizontal drilling of coal seam；
Also including the parallel water cooling tube be located at product pipe side and be positioned at product casing, water cooling tube is provided with check-valves and nozzle,
Water cooling tube extends in the horizontal drilling of coal seam, and water cooling tube length exceedes complete product pipe pipeline section to perforate product pipe pipeline section, water-cooled
Pipe, as the second transfer passage b, needs to be carried secretly the auxiliary raw materials for production of injection by current for conveying；
Product pipe vertical section and segmental arc are complete product pipe pipeline section, and product pipe horizontal segment uses perforate design, if being provided with dry gas
Hole, forms perforate product pipe pipeline section, is provided with synthesis gas deflector in perforate product pipe pipeline section.
The feed process of this technical scheme is: driving ignition phase, will purge medium and preheating by the first transfer passage b
Medium is delivered directly in the horizontal drilling of coal seam from ground the first transfer passage b port, by perforate product pipe pipeline section, pre-heating agent
It is situated between and circulates between the first transfer passage b and product pipe, improve whole product well temperature；
Under normal operation, by the first transfer passage b by catalyst, reactant and additive from ground the first transfer passage
B port is delivered directly in the horizontal drilling of coal seam；By the second transfer passage b port of the second transfer passage b, needs are passed through
Current are carried the auxiliary raw materials for production of injection secretly and are transported in the horizontal drilling of coal seam, and synthesis gas deflector forces crude synthesis gas from perforate
The tapping of product pipe pipeline section enters in the circular passage between product casing and perforate product pipe, the auxiliary of all inputs
All in the horizontal drilling of coal seam, synthesis gas is quenched district to raw materials for production and crude synthesis gas is fully contacted and reacts, afterwards along with thick synthesis
Entraining air stream enters product pipe by perforate product pipe pipeline section, and is entrained to floor outlet by crude synthesis gas stream.
In this embodiment, by confined goods well, auxiliary raw materials for production are effectively communicated to underground coal gasification(UCG)
(ISC) low-temp reaction region, the program uses circular passage (the first conveying between product casing and complete product pipe pipeline section
Passage b vertical section) and product casing and perforate product pipe pipeline section between circular passage (the first transfer passage b horizontal segment)
Auxiliary raw materials for production are transported to the low-temp reaction region (< 350 of underground gasification furnace (ISC well to)oC).For confined goods well,
Auxiliary raw materials for production are maintained at inside product casing horizontal segment, will not contact any coal seam.
The present invention solves the 4th kind of technical scheme of its technical problem substantially with the third scheme, is a difference in that: perforate
Product pipe pipeline section is off-tube, raw materials for production and can be assisted to be fully contacted and react disconnecting district's crude synthesis gas, water cooling tube length
Exceed complete product pipe pipeline section to the disconnecting unit of perforate product pipe pipeline section.
Accompanying drawing explanation
The structural representation of Fig. 1 the first solution of the present invention；
The structural representation of Fig. 2 the second of the present invention solution；
The structural representation of Fig. 3 the third solution of the present invention；
The structural representation of the 4th kind of solution of Fig. 4 present invention.
1:1, the second transfer passage a port in figure, the 2, first transfer passage a port, 3, inject casing, 4, inject into well
Bushing pipe, 5, coiled tubing oxidant injection device, 6, underground instrumentation, the 7, first transfer passage a, the 8, second transfer passage a,
9, nozzle, 10, coal seam, 11, inject well coal seam horizontal drilling, 12, gasification zone, 13, combustion zone, 14, syngas outlet, 15, the
One transfer passage b port, the 16, second transfer passage b port, 17, product casing, 18, product pipe, 19, water cooling tube, 20,
One transfer passage b, the 21, second transfer passage b, 22, perforate product pipe pipeline section, 23, check-valves, 24, nozzle, 25, synthesis gas rapid
Cold-zone, 26, crude synthesis gas, 27, inject well perforate internal lining pipe, 28 product well perforate internal lining pipes, 29, product well coal seam water flat drill
Hole, 30, deflector.
Detailed description of the invention
Below in conjunction with the accompanying drawings, technical scheme is further elaborated.
The invention discloses a kind of auxiliary raw materials for production feed process for coal underground gasifying technology (ISC).Pass through
Catalyst, reactant, additive, purging medium and pre-thermal medium can be transported to underground gasification furnace by technological requirement by the method
Different reaction zones and humidity province in (ISC well to), it is achieved optimize and improve the purpose of its processing performance.
This system specifically describes the standard completion parts including can buying in different suppliers.The innovation of the present invention it
Place, according to single parts different qualities and function, has invented the auxiliary raw materials for production for coal underground gasifying technology (ISC) and has entered
Material system and method, the present invention totally four kinds of technical schemes, specifically illustrate such as embodiment 1-4.
Embodiment 1
As it is shown in figure 1, assist raw materials for production feed system for coal underground gasifying technology, based on underground coal gasification(UCG) unit
Orientation injects well, and orientation is injected well and included that vertical section, segmental arc and horizontal segment, described feed system include following assembly:
What injection casing 3 and concentric were arranged injects into well bushing pipe 4, injects casing 3 and includes vertical section and segmental arc, injects
Well internal lining pipe 4 includes vertical section, segmental arc and horizontal segment；
Inject casing 3 and inject into well the circular passage between bushing pipe 4 as the first transfer passage a7, the first transfer passage a7
Inside is provided with underground instrumentation 6, injects into well bushing pipe 4 inside and is provided with coiled tubing oxidant injection device 5, injects into well lining
Circular passage between pipe 4 and coiled tubing oxidant injection device 5 is the second transfer passage a8, and the second transfer passage a8 is complete
With coal seam isolation until entering high-temperature gasification district this regional temperature of 12(higher than 550 DEG C) and combustion zone 13, the second transfer passage a8
For injecting gasifying process water and needing to be carried secretly by current the auxiliary raw materials for production of injection.
The feed process of this technical scheme is as follows: and blown catalyst, reactant, additive by the first transfer passage a7
Sweep medium and be delivered directly to high-temperature gasification district 12 and combustion zone 13 from ground the first transfer passage port a2；Logical by the second conveying
The second transfer passage port a1 of road a8 will need the auxiliary raw materials for production being carried secretly injection by current to be transported to high-temperature gasification district
12 and combustion zone 13.
Auxiliary raw materials for production can be effectively communicated to underground coal gasification(UCG) (ISC) high temperature reaction zone by this technical scheme, its
Middle auxiliary raw materials for production include:
Reactant: solid hydrocarbon particulates (through pulverizing, grind, screening), liquid hydrocarbon, gas nytron
Thing or product water (low fouling, middle low-corrosiveness).
Catalyst: be used for improving gasification efficiency and synthesis gas quality, producing for coal tar heavy duty rectification property and reduction coal tar
Powder solid phase, liquid phase or the gas phase catalyst of rate.
Additive: for preventing or reduce the corrosion in catalyst and reactant course of conveying and fouling.
The mixture of catalyst, reactant and additive can be simultaneously injected into high temperature reaction zone by same transfer passage
Territory, reaches to optimize and improve the purpose of coal underground gasifying technology performance.
Purging medium such as nitrogen is injected into the first transfer passage a7, it is ensured that the most unexpected coal combustion region, this region
It is in inert gas shielding.Similarly, carbon dioxide, water or steam are also injected into the first transfer passage a7 to replace this district
In territory, to protect the coal seam of rear end, reaction zone, (gasification reaction needs temperature to be higher than 550 to the oxidant of remainingoC).
Auxiliary raw materials for production can (the first conveying be logical by injection casing 3 and the circular passage injected into well between bushing pipe 4
Road a7 vertical section) and inject well and circular passage (horizontal segment of the first transfer passage a7) conveying injected into well between bushing pipe 4
High temperature reaction zone (> 550 to underground gasification furnace (ISC well to)oC).
Auxiliary raw materials for production lead to also by the annular injected into well between bushing pipe 4 and coiled tubing oxidant injection device
Road (the second transfer passage a8) is transported to the high temperature reaction zone (> 550 of underground gasification furnace (ISC well to)oC).
Embodiment 2
For the auxiliary raw materials for production feed system of coal underground gasifying technology, vertical product based on underground coal gasification(UCG) unit
Well, described feed system includes following assembly: product pipe 18 and product casing 17, and circular passage therebetween is first defeated
Send passage b20, product pipe 18 to include complete product pipe pipeline section and perforate product pipe pipeline section 22, set inside the first transfer passage b20
Having underground instrumentation 6, in vertical product bottom, product casing 17 arrives vertical drilling top, coal seam and terminates, with coal seam
Vertical drilling is crossing is provided with injection well perforate internal lining pipe 27, and complete product pipe pipeline section terminates in top, coal seam, perforate product pipe pipeline section
22 start from top, coal seam, and under maximum heat stretches situation, product pipe 18 and the distance injected between well perforate internal lining pipe 27 are more than zero；
Described feed system also includes the parallel water cooling tube 19 be located at product pipe 18 side and be positioned at product casing 17, water cooling tube
19 are provided with check-valves 23 and nozzle 24, and water cooling tube 19 is until in the vertical drilling of coal seam, water cooling tube 19 is logical simultaneously as the second conveying
Road b21, needs to be carried secretly the auxiliary raw materials for production of injection by current for conveying.
The feed process of this technical scheme is as follows: driving ignition phase, by the first transfer passage b20 by catalyst, anti-
Agent, additive and purging medium is answered to be delivered directly in the vertical drilling of coal seam, by opening from ground the first transfer passage b port 15
Hole product pipe pipeline section 22, auxiliary raw materials for production circulate between the first transfer passage b20 and product pipe 18, improve whole product well
Temperature；
Under normal operation, by the first transfer passage b20 by catalyst, reactant, additive and purging medium from ground
First transfer passage b15 is delivered directly in the vertical drilling of coal seam, by the second transfer passage b end of the second transfer passage b21
Mouth 16 will need the auxiliary raw materials for production being carried secretly injection by current to be transported in the vertical drilling of coal seam, and the auxiliary of all inputs is raw
All in the vertical drilling of coal seam, synthesis gas is quenched district 25 and crude synthesis gas 26 is fully contacted and reacts to produce raw material, closes along with thick afterwards
Become gas 26 air-flow to enter product pipe 18 by perforate product pipe pipeline section 22, and be entrained to floor outlet by crude synthesis gas 26 air-flow.
In this technical scheme, by vertical product well, auxiliary raw materials for production can be effectively communicated to underground coal gasification(UCG)
(ISC) cryogenic reaction zone, wherein auxiliary raw materials for production include:
Catalyst: for changing powder solid phase, liquid phase or the gas phase catalyst of synthesis gas components.
Additive: for product well anticorrosion, good antiscale property, blockage resisting and coal tar and product water close in pipeline can be reduced
Degree, viscosity and the additive of freezing point.
The mixture of catalyst, reactant and additive can be simultaneously injected into cryogenic reaction zone by same transfer passage
Territory, reaches to optimize and improve the purpose of coal underground gasifying technology performance.
Purging medium such as nitrogen or carbon dioxide are injected into the first transfer passage, it is ensured that this region is in noble gas and protects
Protect middle non-explosive admixture of gas (synthesis gas and oxidant).
Pre-thermal medium such as air or nitrogen etc., for being preheated by product casing before ignition process, shorten ignition process
Transit time to normal course of operation.After this medium can be by ground level heat switch or heating devices heat, circulation is injected
In product well.
Auxiliary raw materials for production can be transported to ground by the first transfer passage b20 between product casing 17 and product pipe 18
The coal seam vertical drilling of gasified stove (ISC well to), i.e. cryogenic reaction zone (< 350oC).
Auxiliary raw materials for production are delivered directly to the coal of underground gasification furnace (ISC well to) also by the second transfer passage b21
Layer vertical drilling, i.e. cryogenic reaction zone (< 350oC).
Embodiment 3
For the auxiliary raw materials for production feed system of coal underground gasifying technology, confined goods based on underground coal gasification(UCG) unit
Well, confined goods well includes that vertical section, segmental arc and horizontal segment, described feed system include following assembly:
The product casing 17 arranged including concentric and product pipe 18, circular passage therebetween is the first transfer passage
B20, is provided with underground instrumentation 6, product casing 17 and product pipe 18 and extends to coal seam level inside the first transfer passage b20
In boring；
Also including the parallel water cooling tube 19 be located at product pipe 18 side and be positioned at product casing 17, water cooling tube 19 is provided with check-valves
23 and nozzle 24, water cooling tube 19 extends in the horizontal drilling of coal seam, and water cooling tube 19, simultaneously as the second transfer passage b 21, is used for
Conveying needs to be carried secretly the auxiliary raw materials for production of injection by current；
Product pipe 18 vertical section and segmental arc are complete product pipe pipeline section, and product pipe 18 horizontal segment uses perforate design, if being provided with
Dry gas hole, forms perforate product pipe pipeline section 22, is provided with synthesis gas deflector 30 in perforate product pipe pipeline section 22.
The feed process of this technical scheme is: driving ignition phase, by the first transfer passage b20 by catalyst, reaction
Agent, additive and purging medium are delivered directly in the horizontal drilling of coal seam from ground the first transfer passage b port 15, pass through perforate
Product pipe pipeline section 22, auxiliary raw materials for production circulate between the first transfer passage b20 and product pipe 18, improve whole product well temperature
Degree；
Under normal operation, by the first transfer passage b20 by catalyst, reactant, additive and purging medium from ground
First transfer passage b port 15 is delivered directly in the horizontal drilling of coal seam；By the of the second transfer passage b21 of water cooling tube 19
Two transfer passage b ports 16 will need the auxiliary raw materials for production being carried secretly injection by current to be transported in the horizontal drilling of coal seam, closes
Become gas deflector 27 to force crude synthesis gas to enter into product casing 17 from the tapping of perforate product pipe pipeline section 22 and perforate is produced
In circular passage between QC pipeline section, the auxiliary raw materials for production of all inputs all synthesis gas quenching districts in the horizontal drilling of coal seam
25 and crude synthesis gas 26 be fully contacted and react, afterwards along with crude synthesis gas 26 air-flow by perforate product pipe pipeline section 22 enter produce
QC 18, and it is entrained to floor outlet by crude synthesis gas 26 air-flow.
In this embodiment, by confined goods well, auxiliary raw materials for production are effectively communicated to underground coal gasification(UCG)
(ISC) low-temp reaction region, the program uses the circular passage between product casing 17 and complete product pipe pipeline section and product
Auxiliary raw materials for production are transported to underground gasification furnace (ISC by the circular passage between product casing 17 and perforate product pipe pipeline section 22
Well to) low-temp reaction region (< 350oC).For confined goods well, auxiliary raw materials for production are maintained at product casing 17 level
Intrasegmental part, will not contact any coal seam.
Embodiment 4
Technical scheme with the scheme of embodiment 3, is a difference in that substantially: perforate product pipe pipeline section 22 is off-tube, disconnects district
Crude synthesis gas 26 and can assist raw materials for production be fully contacted and react.
The reactant that can be transported to high temperature reaction zone in the present invention by injecting well includes following auxiliary raw materials for production: pass through
The biological particles pulverize, grind, screened.Biological particles can inject water by gasification and carries secretly and be transported to underground gasification
The high temperature reaction zone of stove (ISC well to).As time goes on this reaction zone moves to injection well direction.When biological particles and
When injection water is transported to high temperature reaction zone, injects water heat absorption and become steam.Biological particles is heated simultaneously, through devolatilization
Divide and after pyrolytic reaction, become nascent coke.Afterwards, nascent coke is 550oC to 1500oC interval with in steam and reaction zone
Other gaseous component generating gasification reaction:
Biomass → nascent coke+volatile matter
Nascent coke gasification:
C + ½O2 → CO
C + O2 → CO2
C + H2O → H2+CO
C + CO2 → 2CO
C + 2H2 → CH4
Typical volatile hydrocarbons with methane as representative divides reaction:
CH4 + 2O2 → CO2 + 2H2O
CH4 + H2O ↔ CO + 3H2
Simultaneously, there is a large amount of simultaneous oxidation and reduction reaction in high temperature reaction zone.Biological particles is through gas
Can be stayed by substantial amounts of ash after changing reaction in underground gasification furnace (ISC well to) burned out area, a small amount of grey branch is pressed from both sides by product gas
Take ground to and remove in surface separation device.The benefit injecting biological particles is that effectively to supplement Hydrocarbon former
Expect in underground gasification furnace, in identical gasification furnace cost of investment, improve yield, minimize the increment of running cost, effectively
Improve the economic benefit of underground coal gasification(UCG) (ISC).Meanwhile, the biomass injecting high heating value can be effectively improved synthesis makings
Amount, reduces the coal tar yield of unit synthesis gas.
Similar with biological particles, coal dust also can be transported to the height of underground gasification furnace (ISC well to) as a kind of reactant
Temperature reaction zone.
Coal tar is one of side-product of coal underground gasifying technology.If local coal tar selling market is in bad order,
It can also be transported in underground gasification furnace as a kind of reactant.In entering high temperature reaction zone, coal tar heat absorption evaporation becomes
For gas phase.Afterwards, after thermal cracking, steam reformation and gasification, synthesis gas is generated.Part unreacted coal tar component completely
It is synthesized gas product clip to take to and capable of circulation after ground carries out separating treatment be transported to underground gasification furnace reaction zone.
Product water, another side-product of coal underground gasifying technology, containing impurity such as dissolving salt, Hydrocarbon, benzene
Phenol and other compounds.After entering into high temperature reaction zone, in product water, all organic compound are all by burned and gasification；Other
Inorganic compound generates salt after burning and is deposited in underground gasification furnace in the coal ash remained；Part unreacted in product water
Component is synthesized gas product clip and takes to and capable of circulation after ground carries out separating treatment be transported to underground gasification furnace pyroreaction completely
District.Different from above-mentioned biomass, coal dust or coal tar, the key benefit injecting product water is the note that can reduce gasification fresh water
Enter amount and reduce the expense that product water stores and processes.
The coal seam being suitable for injection into reactant needs to there is effective area of isolation between its overlying rock and underlying stratum,
To guarantee that the reactant raw material injected and gasification reaction exist only in coal seam.Use and reclaim gas injection point (CRIP) injection oxygen continuously
The technique of agent can ensure that can to will be located in, eventually through burning and gasification reaction, the reactant that flame rear do not reacts whole
Consume.The reactant injected has to pass through high temperature reaction zone, so can be greatly promoted its reactivity, minimizes its reaction not exclusively
Probability.Meanwhile, only (bigger injection flow) conveying reactant when underground gasification furnace is properly functioning, to ensure to inject flow
Enough carry reactant secretly to high temperature reaction zone, prevent the blocking of well.In load down operation, abnormal running and short-term closed furnace process
In, need stopped reaction agent to inject and inject fresh water and rinse this passage to keep its unimpeded reactionless dose of deposition.
The present invention can be transported to the catalyst of high temperature reaction zone include following auxiliary raw materials for production by injecting well: water coal
Gas catalyst for water-gas shift reaction is naturally present in coal seam, particularly in the mineral of coal (ash).These catalyst are main
It is aluminium sesquioxide (Al2O3) and iron sesquioxide (Fe2O3), its content in ash is typically respectively 15-25wt% and 15-
35wt%(ash main component silicon dioxide is 30-50wt%).But the catalyst activity in ash is generally than industrial catalyst
Activity much lower, less mainly due to its active surface area, effective active component is less and the sulfur of self, hydrargyrum in coal seam
And chloride poisoning.Therefore, catalyst conversion efficiency based on ash is the lowest and useful life is the shortest.Water gas shift reaction is
One reversible reaction:
CO +H2O ↔ CO2 +H2
If target is to reduce sulfide emission, then can add these high-temperature water gas conversion catalysts.By following
Reaction, these catalyst can generate more gasifying agent (steam) while sulfur catching:
Al2O3 + 3H2S → Al2S3 + 3H2O
Fe2O3 + 3H2S → 2FeS + 3H2O + S
Other catalyst with preferable sulphur removal (or sulfur poisoning) are Catalysts for Low-temperature Water-gas Shift Reactions:
ZnO + H2S → ZnS +H2O
CuO + H2S → CuS + H2O
Cobalt-molybdenum composite catalyst has preferable anti-sulfur poisonous performance.Such as, the cobalt-molybdenum/aluminium oxide (Co-of potassium (k) has been supported
Mo/Al2O3) or cobalt-nickel/aluminium oxide (Co-Ni/Al2O3) catalyst shows higher Water gas shift/WGS activity.These catalysis
The active component of agent is at relatively low temperature (250-350oC) under the most complete cure but there is higher activity equally.
Catalyst for methanation in presence of sulfur, such as magnesium nisiloy hydrochlorate (MNS) catalyst show H2S and NH3Higher tolerance
Property.This catalyst has higher activity to methanation reaction, and MNS catalyst can pass through high-temperature steam and CO2Reform (700-
900oC) tar and light hydrocarbon are converted into synthesis gas by process.
CO + 3H2 ↔ CH4 + H2O
CO2 + 4H2 ↔ CH4 +2H2O
In order to reduce catalyst (Al in ash2O3And Fe2O3) activity to water gas shift reaction, injecting catalyst can be passed through
Toxicity includes that sulfide is (such as H2S), ammonia is (such as NH3), sodium salt (such as NaCl) and chloride (such as HCl) suppress or reduce its ash
The catalysis activity divided, improves carbon monoxide productivity.
The present invention can be transported to the additive of high temperature reaction zone include following auxiliary raw materials for production by injecting well: anticorrosion
Inhibitor and pH nertralizer can carry together with the product water containing acid, chloride and phenols.When temperature is higher than 100oC, phenols
Show stronger corrosivity.This can occur injecting into well the bushing pipe position near oxidant decanting point.Due to horizontal liner
Pipe is consumptive in gasification furnace useful life, in therefore the major function of anticorrosion inhibitor is to ensure that gasification furnace useful life
Inject the integrity of well.
Good antiscale property additive can effectively prevent from injecting the fouling of distribution channel inwall.Such as phosphonic acids alkali antisludging agent can be effective
Prevent carbonate and sulfate scale；Polymer base antisludging agent can effectively prevent the sulfate/carbonate fouling of barium, strontium and calcium.
The aminoacid of a kind of synthetic of poly-aspartate, can be as antisludging agent, corrosion inhibiter, dispersant, chelating agen and water absorbent.
Poly-aspartate is nontoxic due to it, biodegradable and pollution-free, is optimal underground coal gasification(UCG) (ISC) process.
The present invention can include by injecting the purging medium of well conveying:
Nitrogen is injected in the first transfer passage a7, it is ensured that the most unexpected coal combustion region, this region is in noble gas
In protection.In draining dry run before the ignition event, it is passed through nitrogen simultaneously and replaces the residual air in this region.
Similarly, carbon dioxide, water or steam are also injected into this first transfer passage a7 with remaining in replacing this region
Oxidant with protection rear end, reaction zone (gasification reaction needs temperature to be higher than 550 in coal seamoC).
The present invention injects casing 3 and injects into well the circular passage of bushing pipe 4 as the first transfer passage a7:
This first transfer passage a7 for be positioned at injection casing 3 vertical section internal (external diameter is 7 ", 7 ", 7 ", 8 ", 9
") with inject into well bushing pipe 4 outside (external diameter is 4 ", 5 ", 5 ", 5 ", 5 ", 6 ") circular passage.Due to ground
Lower instrumentation 6(external diameter is ", ", 1 ") be arranged in this circular passage, cause its effective aisle spare to reduce.Inject well
Sleeve pipe 3 terminates after bottom is become horizontal direction from vertical direction.Start from this position to product well intersection, first
Transfer passage a7 is horizontal drilling inside, coal seam and injects into well the circular passage outside bushing pipe 4.
Directly contact in auxiliary raw materials for production can being transported to coal bed drilling by this first transfer passage a7 and with coal seam.
Afterwards auxiliary raw materials for production can be delivered directly to high temperature reaction zone (coal seam temperature > 550oC, ignition temperature may be up to 2000oC).By
Directly contact with coal seam in auxiliary raw materials for production, the additional materials preferably not reacted with coal seam under low temperature.
The present invention injects into well the circular passage between bushing pipe 4 and coiled tubing oxidant injection device 5 as second
Transfer passage a8, this second transfer passage a8 be positioned at inject into well bushing pipe 4 internal (injecting into well bushing pipe 4 external diameter is 4 ", 5 ",
5 ", 5 ", 5 " and, 6 ") outside with coiled tubing oxidant injection device 5 (outside coiled tubing oxidant injection device 5
Footpath is 2 ", 2 ", 2 ", 3 ", 4 ") circular passage.This second transfer passage a8 from well head vertical section start to
Under extend to horizontal segment, until underground gasification furnace high temperature reaction zone.
The auxiliary raw materials for production that this second transfer passage a8 is suitable for directly to contact with coal seam are (as containing dissolving salt, carbon
The product water of hydrogen compound, phenol and other compound impurities).Auxiliary raw materials for production can be completely sealed in note by this passage
Enter in well internal lining pipe 4, until underground gasification furnace high temperature reaction zone.This additional materials will directly be burned after entering high temperature reaction zone
With gasification reaction consumption.Can be by design with control in the minimum entrainment rate of liquid phase fluid guarantees passage in this passage without solid
Phase impurity deposits.
The present invention can be transported to the catalyst of cryogenic reaction zone by product well and include following auxiliary raw materials for production: cobalt-
Molybdenum composite catalyst has preferable anti-sulfur poisonous performance.Such as, the cobalt-molybdenum/aluminium oxide (Co-Mo/Al of potassium (k) has been supported2O3)
Or cobalt-nickel/aluminium oxide (Co-Ni/Al2O3) catalyst shows higher Water gas shift/WGS activity.Active group of these catalyst
Divide at relatively low temperature (250-350oC) under the most complete cure but there is higher activity equally.
Catalyst for methanation in presence of sulfur, such as magnesium nisiloy hydrochlorate (MNS) catalyst show H2S and NH3Higher tolerance
Property.This catalyst has higher activity to methanation reaction, and MNS catalyst can pass through high-temperature steam and CO2Reform (700-
900oC) tar and light hydrocarbon are converted into synthesis gas by process.
CO + 3H2 ↔ CH4 + H2O
CO2 + 4H2 ↔ CH4 +2H2O
The present invention can be transported to the additive of cryogenic reaction zone by product well and include following auxiliary raw materials for production: anticorrosion suppresses
Agent and pH nertralizer can carry together with the product water containing acid, chloride and phenols.When temperature is higher than 100oC, phenols shows
Go out stronger corrosivity.This can occur in the position close to cooling water decanting point.The major function of anticorrosion inhibitor is to ensure that gas
The integrity of product well in change stove useful life.
Good antiscale property additive can effectively prevent from injecting the fouling of distribution channel inwall.Such as phosphonic acids alkali antisludging agent can be effective
Prevent carbonate and sulfate scale；Polymer base antisludging agent can effectively prevent the sulfate/carbonate fouling of barium, strontium and calcium.
The aminoacid of a kind of synthetic of poly-aspartate, can be as antisludging agent, corrosion inhibiter, dispersant, chelating agen and water absorbent.
Poly-aspartate is nontoxic due to it, biodegradable and pollution-free, is optimal underground coal gasification(UCG) (ISC) process.
Alcohols, can reduce product water and the freezing point of coal tar of well head output such as methanol.When ambient temperature is less than producing
During the freezing point of product water and coal tar, can be used for preventing it from condensing in surface duct.Meanwhile, methanol can also reduce product well
The density of interior coal tar and viscosity, prevent product well from blocking.
Nitrogen is injected into the first transfer passage b20, it is ensured that this region is in inert gas shielding, non-explosive gas
Mixture (synthesis gas and oxidant).In draining dry run before the ignition event, it is passed through nitrogen simultaneously and replaces this region
Interior residual air.Product well purging has only to carry out once at whole underground gasification furnace run duration.Afterwards, in this region meeting
Owing to migrating of a small amount of synthesis gas forms synthesis gas and the mixture of nitrogen.
Pre-thermal medium, for being preheated by product casing 17 before ignition process, shortens ignition process to normal course of operation
Transit time.After this medium can be by ground level heat switch or heating devices heat, product well is injected in circulation.Air or nitrogen
Gas can be as pre-thermal medium.The hot synthesis gas that neighbouring operating underground gasification furnace produces also can be injected into this as pre-thermal medium
Product well.Similarly, steam can also be used for this passage, maintains the temperature of product well in load down operational mode.
The first transfer passage b20 between vertical product casing 17 and the product pipe 18 of the present invention as transfer passage,
This transfer passage be positioned at product casing 17 internal (external diameter is 7 ", 7 ", 8 ", 9 ", 9 ", 9 ", 10 ")
Outside with product pipe 18 (external diameter is 4 ", 4 ", 5 ", 5 ", 5 ", 5 ") circular passage.Due to water cooling tube 19(external diameter
It is 1 ". 1 ", 216", 2 ") and underground instrumentation 6(external diameter be ", ", 1 ") be arranged in this circular passage, its
Effectively aisle spare can reduce.By this transfer passage, auxiliary raw materials for production can be transported to coal seam vertical drilling and coal
Layer directly contact.
The confined goods casing 17 of the present invention and the first transfer passage b20 of product pipe 18 are as transfer passage: this is defeated
Send passage be positioned at product casing 17 internal (external diameter is 7 ", 7 ", 8 ", 9 ", 9 ", 9 ", 10 ") with produce
QC 18 outside (external diameter is 4 ", 4 ", 5 ", 5 ", 5 ", 5 ") circular passage.Owing to water cooling tube 19(external diameter is 1
¼”. 1½”, 2⅟16", 2 ") and underground instrumentation 6(external diameter be ", ", 1 ") be arranged in this circular passage, it has
Effect aisle spare can reduce.Product casing 17 starts from ground to bottom from vertically becoming level.Perforate product
Pipe pipeline section 22 starts to extend in the horizontal drilling of coal seam from horizontal level.Perforate product pipe pipeline section 22 can be selected for synthesis
Pipe or the off-tube continuously of gas deflector 30.Auxiliary raw materials for production can be transported to level set by this first transfer passage b20
In pipe, discord coal seam directly contacts.
It is internal (outer that the water cooling tube 19 of the present invention is positioned at water cooling tube 19 simultaneously as the second transfer passage b21: this transfer passage
Footpath is 1 ", 1 ", 216", 2 "), end comprises check-valves 23 and nozzle 24.
For vertical product well, water cooling tube 19 perforate to be exceeded product pipe pipeline section 22 end, raw materials for production can will be assisted straight
Connect in being transported to coal seam vertical drilling and contact with coal seam.
For confined goods well, water cooling tube 19 complete product to be exceeded pipe pipeline section, be positioned at perforate product pipe pipeline section 22 or its
Auxiliary raw materials for production can be delivered directly in horizontal case, directly contact with crude synthesis gas 26 by gap.
" embodiment " mentioned above be included in the correlation properties described in embodiment, structure, feature all with
At least one of which embodiment of the present invention is correlated with.Therefore, the above repeatedly mentions the place of " in an embodiment "
The most all refer in particular to same embodiment.Additionally, the correlation properties described in embodiments, structure, feature can be with any
The suitably one or more combination of mode, the foregoing is only the preferred embodiments of the invention, is not limited to this
Invention.For those skilled in the art, the present invention can have various change and change.All the spirit and principles in the present invention it
In, any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.
Claims (4)
1. for the feed process of coal underground gasifying technology auxiliary raw materials for production, it is characterised in that described feed process is as follows:
By the first transfer passage a by catalyst, reactant, additive and purging medium from ground the first transfer passage a port
It is delivered directly to high-temperature gasification district and combustion zone；
To need to be carried secretly the auxiliary raw materials for production of injection by current by the second transfer passage a port of the second transfer passage a
It is transported to high-temperature gasification district and combustion zone；
Described first transfer passage a is to inject casing and the circular passage injecting into well between bushing pipe of concentric setting, the
Two transfer passage a are to inject into well the circular passage between bushing pipe and coiled tubing oxidant injection device, the second transfer passage a
Isolate until entering high-temperature gasification district and combustion zone with coal seam completely.
2. for the feed process of coal underground gasifying technology auxiliary raw materials for production, it is characterised in that described feed process is as follows:
Driving ignition phase, will purge medium and pre-thermal medium from ground the first transfer passage b port by the first transfer passage b
Be delivered directly in the vertical drilling of coal seam, by perforate product pipe pipeline section, pre-thermal medium the first transfer passage b and product pipe it
Between circulate, improve whole product well temperature；
Under normal operation, by the first transfer passage b by catalyst, reactant and additive from ground the first transfer passage
B port is delivered directly in the vertical drilling of coal seam, is passed through by needs by the second transfer passage b port of the second transfer passage b
Current are carried the auxiliary raw materials for production of injection secretly and are transported in the vertical drilling of coal seam, and the auxiliary raw materials for production of all inputs are all in coal seam
In vertical drilling, synthesis gas quenching district and crude synthesis gas are fully contacted and react, and are produced by perforate along with crude synthesis gas stream afterwards
QC pipeline section enters product pipe, and is entrained to floor outlet by crude synthesis gas stream；
Described first transfer passage b is the circular passage between product pipe and product casing, and product pipe includes complete product pipe
Pipeline section and perforate product pipe pipeline section,
Second transfer passage b is the parallel water cooling tube be located at product pipe side and be positioned at product casing, and water cooling tube is provided with non-return
Valve and nozzle, water cooling tube is until in the vertical drilling of coal seam, water cooling tube length exceedes perforate product pipe pipeline section end.
3. for the feed process of coal underground gasifying technology auxiliary raw materials for production, it is characterised in that described feed process is as follows:
Driving ignition phase, will purge medium and pre-thermal medium from ground the first transfer passage b port by the first transfer passage b
Be delivered directly in the horizontal drilling of coal seam, by perforate product pipe pipeline section, pre-thermal medium the first transfer passage b and product pipe it
Between circulate, improve whole product well temperature；
Under normal operation, by the first transfer passage b by catalyst, reactant and additive from ground the first transfer passage
B port is delivered directly in the horizontal drilling of coal seam；By the second transfer passage b port of the second transfer passage b, needs are passed through
Current are carried the auxiliary raw materials for production of injection secretly and are transported in the horizontal drilling of coal seam, and synthesis gas deflector forces crude synthesis gas from perforate
The tapping of product pipe pipeline section enters in the circular passage between product casing and perforate product pipe, the auxiliary of all inputs
All in the horizontal drilling of coal seam, synthesis gas is quenched district to raw materials for production and crude synthesis gas is fully contacted and reacts, afterwards along with thick synthesis
Entraining air stream enters product pipe by perforate product pipe pipeline section, and is entrained to floor outlet by crude synthesis gas stream；
First transfer passage b be concentric arrange product casing and product pipe between circular passage, product casing and
Product pipe extends in the horizontal drilling of coal seam, and product pipe includes complete product pipe pipeline section, and perforate product pipe pipeline section, perforate product
Synthesis gas deflector it is provided with in pipe pipeline section；
Second transfer passage b is the parallel water cooling tube be located at product pipe side and be positioned at product casing, and water cooling tube is provided with non-return
Valve and nozzle, water cooling tube extends in the horizontal drilling of coal seam, and water cooling tube length exceedes complete product pipe pipeline section to perforate product pipe
Pipeline section.
The most according to claim 3, for the feed process assisting raw materials for production of coal underground gasifying technology, its feature exists
In: described perforate product pipe pipeline section is off-tube, raw materials for production and can be assisted to be fully contacted and react disconnecting district's crude synthesis gas,
Water cooling tube length exceedes complete product pipe pipeline section to the disconnecting unit of perforate product pipe pipeline section.
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| CN108518211A (en) * | 2018-03-29 | 2018-09-11 | 中为(上海)能源技术有限公司 | Oxidant mixed injection system and operating method for coal underground gasifying technology |
| CN113338934A (en) * | 2021-07-07 | 2021-09-03 | 中国矿业大学 | Deep coal fluidization exploitation in-situ gasification device |
| CN115355786A (en) * | 2022-08-26 | 2022-11-18 | 中国矿业大学 | Method for eliminating CO product of efficient catalytic oxidation blasting |
| CN115467648A (en) * | 2022-08-31 | 2022-12-13 | 西安石油大学 | Microwave energy coal underground anaerobic gasification method |
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|---|---|
| CN106223925B (en) | 2019-01-08 |
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