CN205990904U - Waste heat recovery product well system for coal underground gasifying technology - Google Patents
Waste heat recovery product well system for coal underground gasifying technology Download PDFInfo
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- CN205990904U CN205990904U CN201620929802.5U CN201620929802U CN205990904U CN 205990904 U CN205990904 U CN 205990904U CN 201620929802 U CN201620929802 U CN 201620929802U CN 205990904 U CN205990904 U CN 205990904U
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Abstract
This utility model provides a kind of waste heat recovery product well system for coal underground gasifying technology, and this waste heat recovery product well system includes：Product pipe, jacket pipe, water cooling tube, measuring instrument system, product casing, High Temperature High Pressure wellhead equipment and ground waste-heat recovery device etc., in this product well system, all parts all easily reclaim, reuse, and the heat that down-hole high pressure high temperature vapor is carried out can be used for surface production technique, steam turbine power generation, boiler generate electricity, other ground public utilities or plant area's life are personal etc..The effective monitoring to product well not only can be realized, control and protection by this utility model; and reliable and effective recovery and comprehensive utilization has been carried out to the waste heat of high-temperature crude synthesis gas; significantly decrease cooling water amount and reduce the requirement that waste water downstream is processed; it is truly realized coal comprehensive high-efficiency to utilize, reduce whole coal underground gasifying technology（ISC）Energy consumption, finally solve existing coal underground gasifying technology（ISC）The technical barrier facing.
Description
Technical field
This utility model is related to a kind of residual neat recovering system, more particularly to a kind of for coal underground gasifying technology
Waste heat recovery product well system.
Background technology
Underground coal gasification(UCG)（ISC）It is a kind of by the controlled burning to subterranean coal（Imperfect combustion）And gasified reverse
Should, coal is converted into the technical process of gas products.Product gas are commonly known as synthesis gas, can as fuel production,
The raw material of the downstream processes such as Chemical Manufacture, generating.This technical process set shaft building completion, underground coal mining and coal gasifying process skill
Art, have the advantages that safety is good, the little, high efficiency of investment, pollution few.
Coal seam is led directly to by ground drilling, the injection of oxygen supply agent and product gas output provide effective passage.One is used for
The drilling well of oxidant injection is referred to as " injection well ", and the drilling well that another one is used for producing product gas is referred to as " product well ".Directional Drilling
Well and vertical drilling all can be used as injection well or product wells.
When having injection well, product well and horizontal channel to couple together the two in coal seam, this construction is referred to as a coal
Charcoal underground gasification（ISC）Unit or well pair.ISC unit includes combustion zone, gasification zone and pyrolysis zone.Given birth to by underground coal gasification(UCG)
The product gas becoming（Crude synthesis gas）Usually contain synthesis gas（CO、CO2、 H2、 CH4Deng）And other impurities composition（Solid
Grain, water, coal tar, H2S、NH4, COS etc.）.Its complicated component degree depends on many aspects, including：The coal ground therapeutic method to keep the adverse QI flowing downwards
Change used oxidant（Air or other oxidants such as oxygen, oxygen-enriched air or vapour mixture）, underground coal gasification(UCG) work
The operating parameter of skill（As temperature, pressure, flow etc.）, the inherent water in coal seam or surrounding formations penetrate into water in coal seam, ature of coal
Deng.
One of Main Bottleneck of coal underground gasification technology is that the effective discharge of product well in running limits and produces
The damage of product well.The main cause of these problems includes the wrong type selecting of product well, and happen suddenly high-temperature condition, and heat dissipation design considers not
Foot, corrosion protection design considers not enough and stopping state etc..According to existing patent documentation, the concrete technical problems facing at present
Including：
（1）Because high heat load acts directly on its absolute high temperature causing on product well（May be up to 700oC）.When this temperature
Degree exceedes the yield stress invalid temperature of product casing material, ultimately causes the damage of product well.
（2）Due to thermal expansion limited by well cementing of cement sleeve pipe（Thermal stretching）The sleeve pipe causing and/or the damage of cementing position
Bad.
（3）Due to not considering the free suspension of product pipe in vertical or confined goods well（Deadweight）Thermal stretching and the product that causes
QC flexural deformation.
（4）Because web rot corrosion synthesis gas causes deterioration and the damage of product well integrity.Including granule with a high speed
Gas pickling, hydrogen embrittlement or hydrogen induced cracking (HIC), chloride ion spot corrosion, sulfide（H2S）Stress corrosion cracking, CO2Corrosion, dissimilar metal
Couple corrosion and other corrosion mechanisms.
（5）In ignition process, because product well temperature is relatively low, the volatile matters of coal and thermal decomposition product heavy constituent（Tar, Colophonium
Deng）Easily condense in product well and mix with solid particle and coal ash, ultimately cause the partially or completely blocking of product well.Class
As, when underground gasification load down runs, because the reduction of product well temperature and air-flow are carried solid, liquid body impurity secretly and not exclusively made
The product well plugging becoming.
（6）Product well underground monitoring device system is not enough, causes cannot detect in advance and process product well plugging and/or damage
Bad problem.
（7）Product well does not have enough security system devices and processing method, to tackle high-temperature product well and to damage, gas is dirty
The problems such as design of dye thing leakage and system exception ruuning situation and the not enough strata pressure causing of configuration are too high.
（8）The product well equipment easily not reclaiming and can re-using.
（9）Waste heat in crude synthesis gas under suitable process recovery well is not had to reduce whole underground coal gasification(UCG)
（ISC）The energy consumption of technique.
Utility model content
One of the purpose of this utility model is to solve the deficiencies in the prior art, provides one kind to be used for underground coal gasification(UCG) work
The waste heat recovery product well system of skill.
This utility model solves its technical problem and be employed technical scheme comprise that：
A kind of waste heat recovery product well system for coal underground gasifying technology, based on underground coal gasification(UCG) unit
（ISC）Vertical waste heat recovery product well, described waste heat recovery product well system includes following assembly：
Well mouth hanger, is fixed at product well well head, for hanging the associated component of waste heat recovery product well system；
Product pipe, in product well, is freely suspended from well mouth hanger, the end section of product pipe is set using perforate
Meter, is provided with some pores, forms perforate product pipe pipeline section, and remainder is complete product pipe pipeline section, perforate product pipe pipeline section side
Just crude synthesis gas enter product stream by pore and earthward export；
Jacket pipe, is freely suspended from well mouth hanger, positioned at product pipe outside and with product pipe concentric setting, jacket pipe
Form circular passage and product pipe between, jacket pipe end caliber is progressively decreased to be in close contact with product pipe outer wall, contact site
Position forms a metal to metal seal structure（Product pipe is contacted by ring surface with jacket pipe, more closely pastes between contact site
Close, reach the effect of sealing）；When continuous cooling water is injected in circular passage, carry out heat exchange type with high-temperature crude synthesis gas
Become high pressure high temperature vapor, steam flows to ground by circular passage, carries out waste heat recovery；
Water cooling tube, by eccentric well mouth hanger inner ring, parallel be freely suspended from by product pipe, and be located at jacket pipe
Interior, for injection cooling water, unsaturated steam and/or anticorrosion good antiscale property toward in the circular passage between jacket pipe and product pipe
Medium, described water cooling tube extends to the bottom of circular passage between jacket pipe and product pipe, and water-cooled tube end is provided with nozzle, water-cooled
It is provided with check-valves, check-valves are used for maintaining in water cooling tube water-column and prevent reverse steam from entering water cooling tube in pipe；Cooling water
Injection rate is controlled by the crude synthesis gas temperature that product pipe top measures it is ensured that crude synthesis gas temperature is less than design temperature
（300-350℃）；
Measuring instrument system, including distributed temperature sensor, pressure transducer and sonic sensor, described measuring instrument
System is fixed at product pipe periphery, and is in the position contour with water cooling tube nozzle, and described distributed temperature sensor is used for
By monitoring product well downhole temperature and then controlling cooling water flow in water cooling tube, distributed pressure sensor is used for monitoring product
Well down-hole and chuck overpressure, distributed acoustic wave sensor is used for monitoring product well down-hole emergency case, such as sleeve pipe or product
QC damages（Cracking, bending etc.）, solid particle or liquid bolt enter product pipe and product blockage etc.；
Product casing, is fixed in the stratum of product well periphery by high-temperature cement set, described product casing conduct
Product pipe, the shell of jacket pipe, water cooling tube and measuring instrument system, start to extend to coal seam near top from product well well head,
Remaining vertical coal bed drilling is not provided with sleeve pipe, and the annular channels between product casing and jacket pipe are as system exception running
Standby pressure release passage；Specifically, product casing passes through high temperature resistant box cupling and screw thread by some sections of product casing bodies
It is formed by connecting.
The wellhead equipment of high temperature high voltage resistant（Wherein pressure sets rated range and is defined by meeting lithostatic pressure, and temperature meets
180-350 DEG C of operating temperature range）, comprise at least one instrument pressed joint port, for connecting measuring instrument system；Also
Including at least four groups of circulation passage ports and valves, the effect of described four groups of circulation passage ports and valve is as follows：One stream is all
As crude synthesis gas outlet, a circulation passage port and the valve in product pipe when road port and valve normally run for system
As the outlet of circular passage between product casing and jacket pipe when running for system exception, a circulation passage port and valve
As the outlet of circular passage between jacket pipe and product pipe when door normally runs for system, steam for the high pressure in circular passage
Steam flow goes out, and a circulation passage port connects the medium inlet of water cooling tube with valve, for toward injected media in water cooling tube, described
Wellhead equipment is additionally provided with thermometer and pressure gauge, for directly displaying the temperature and pressure numerical value of each passage of well head, and data
Transmitting device, for monitoring the situation of synthesis gas, high steam and cooling water distribution channel, and the data that each sensor is obtained
Signal feeds back to control system and is stored in data base；
Ground waste-heat recovery device, annular channel outlet and water cooling tube inlet between connection product pipe and jacket pipe, will
The waste heat that High Temperature High Pressure saturated vapor in circular passage between product pipe and jacket pipe is carried out is used for surface production technique,
（As air separation unit, air compressor, synthesic gas compressor, downstream purification or synthesis technique etc.）, steam turbine power generation or directly replace
Use by oneself for Motor drive pump, boiler generating, other ground public utility or plant area's life etc..
It is as follows that this utility model solves another technical scheme that its technical problem adopted：
For the waste heat recovery product well system of coal underground gasifying technology, more than the orientation based on underground coal gasification(UCG) unit
Recuperation of heat product well, described product well includes vertical section, segmental arc and horizontal segment, described waste heat recovery product well system include as
Lower assembly：
Well mouth hanger, is fixed at product well well head, for hanging the associated component of waste heat recovery product well system；
Product pipe, in product well, the end section of product pipe adopts perforate to design, and is provided with some pores, formation is opened
Hole product pipe pipeline section, remainder is complete product pipe pipeline section, facilitates crude synthesis gas to enter product stream earthward by pore
Outlet；
Jacket pipe, positioned at product pipe is outside and the concentric setting with product pipe, forms annular between jacket pipe and product pipe
Passage, jacket pipe end caliber is progressively decreased to be in close contact with product pipe outer wall, and contact site forms a metal to metal seal
Structure；When continuous cooling water is injected in circular passage, carries out heat exchange with high-temperature crude synthesis gas and form high pressure high temperature vapor,
Steam flows to ground by circular passage, carries out waste heat recovery；
Water cooling tube, by the parallel pipe located at product, and is located in jacket pipe, for toward the annular between jacket pipe and product pipe
Injection cooling water, unsaturated steam and/or anticorrosion good antiscale property medium in passage, described water cooling tube extends to jacket pipe and product
Circular passage bottom between pipe, water-cooled tube end is provided with nozzle, is provided with check-valves inside water cooling tube, for maintaining water in water cooling tube
Pillar height degree and prevent reverse steam from entering water cooling tube；The crude synthesis gas temperature that cooling water injection rate is measured by product pipe top Lai
Control it is ensured that crude synthesis gas temperature is less than design temperature（300-350℃）；
Measuring instrument system, including distributed temperature sensor, pressure transducer and sonic sensor, described measuring instrument
System is fixed at product pipe periphery, and is in the position contour with water cooling tube nozzle, and described distributed temperature sensor is used for
Control cooling water flow in water cooling tube by monitoring product well downhole temperature, distributed pressure sensor is used for monitoring product Jing Jing
Descend and chuck overpressure, distributed acoustic wave sensor is used for monitoring product well down-hole emergency case, such as sleeve pipe or product pipe
Damage（Cracking, bending etc.）, solid particle or liquid bolt enter product pipe and product blockage etc.；
Product casing, is fixed in the stratum of product well periphery by high-temperature cement set, described product casing conduct
Product pipe, the shell of jacket pipe, water cooling tube and measuring instrument system, start to extend to inside coal seam from product well well head, product
Annular channels between casing and jacket pipe are as the standby pressure release passage of system exception running；
The wellhead equipment of high temperature high voltage resistant（Wherein pressure setting rated range meets lithostatic pressure and is defined, and temperature meets
180-350 DEG C of operating temperature range）, comprise at least one measuring instrument splice port, for connecting measuring instrument system；Also
Including at least four groups of circulation passage ports and valves, wherein：Make when one circulation passage port and valve normally run for system
Export for the crude synthesis gas in product pipe, a circulation passage port and valve are used for when system exception runs as product casing
When the outlet of circular passage and jacket pipe between, a circulation passage port and valve normally run for system as jacket pipe and
The outlet of circular passage between product pipe, flows out for the high steam in circular passage, a circulation passage port connects with valve
The medium inlet of water cooling tube, for toward injected media in water cooling tube, described wellhead equipment is additionally provided with thermometer and pressure gauge, uses
In the temperature and pressure numerical value directly displaying each passage of well head, and data transmission device, for monitoring synthesis gas, high steam
With the situation of cooling water distribution channel, and by each sensor obtain data signal feed back to control system；
Ground waste-heat recovery device, annular channel outlet and water cooling tube inlet between connection product pipe and jacket pipe, will
The waste heat that High Temperature High Pressure saturated vapor in circular passage between product pipe and jacket pipe is carried out is used for surface production technique；
（As air separation unit, air compressor, synthesic gas compressor, downstream purification or synthesis technique etc.）, steam turbine power generation or directly replace
Use by oneself for Motor drive pump, boiler generating, other ground public utility or plant area's life etc.；
In the technical program, described product pipe, jacket pipe, water cooling tube and product casing all with orientation waste heat recovery product
The shape of well is consistent, namely all includes vertical section, segmental arc and horizontal segment, and the vertical section of product pipe, jacket pipe and water cooling tube is equal
By well mouth hanger free suspension, bending section passes through product casing bending section and supports, and horizontal component passes through product casing
Horizontal component supports；
The vertical section of product casing and segmental arc are fixed in the stratum of product well periphery by high-temperature cement set, described
Perforate product pipe pipeline section self-produced QC segmental arc end starts, and extends to the directional well top in no sleeve pipe coal bed drilling, and with
Injection well horizontal bore internal lining pipe intersects.
Preferably, described perforate product pipe length of pipe section is that 1-3 pipeline section is long（I.e. 6-18 rice）, the aperture of perforate is 5-
35mm, perforate accounts for the 5-35% of tube wall area with interval mode layout of interlocking, the perforate gross area.
Preferably, in described vertical product well complete product pipe pipeline section and perforate product pipe pipeline section all using corrosion-resistant nickelic
Chromium alloy material（As section alloy 600 like this, Meng Naier alloy 400 and with first-class）Process, under maximum heat stretches situation, open
The distance between the end of hole product pipe pipeline section and product bottom are more than zero.
Preferably, in described confined goods well complete product pipe pipeline section and perforate product pipe pipeline section all using corrosion-resistant nickelic
Chromium alloy material（As section alloy 600 like this, Meng Naier alloy 400 and with first-class）Process, horizontal bore internal lining pipe is in coal
Can progressively consume in charcoal underground gasification process, material selection carbon steel pipe.
Preferably, described perforate product pipe pipeline section diameter is less than complete product pipe pipeline section diameter, in order in Completion Operations
Perforate product pipe pipeline section and complete product pipe pipeline section connecting portion box cupling pass through jacket pipe caliber and reduce part；Or it is located at folder
Sleeve pipe caliber reduces the complete product pipe pipeline section of part from the size bigger than product pipe other parts pipeline section diameter.
Preferably, under the maximum axial elongated distance situation that thermal expansion and free suspension deadweight cause, metal-metal is close
The position of seal structure is still located at complete product pipe pipeline section.
Preferably, described check-valves（4）1-3 above perforate product pipe pipeline section with complete product pipe pipeline section joint
The low temperature zone position of pipeline section length, the length of each pipeline section length is 6m, check-valves（4）It is provided with several, realize multiple protection functions,
Maintain water column suitable height and prevent high pressure high temperature vapor from revealing.
Preferably, there is appropriate gap structure between the contact portion of metal to metal seal structure and product pipe（Product pipe
Contacted by ring surface with jacket pipe, more closely fit between contact site, reach the effect of sealing, but due to being all rigidity
, there is a little gap, i.e. gap structure in face）, cooling water after water cooling tube is injected between product pipe and jacket pipe, a small amount of water
High-temperature crude synthesis gas stream is leaked into, to play part shock chilling function fall at gap structure by metal to metal seal joint
The temperature of low crude synthesis gas.
The beneficial effects of the utility model：In this product well system, all parts all easily reclaim, reuse, and down-hole is high
The heat that warm high compressed steam is carried out can be used for surface production technique, steam turbine power generation, boiler generates electricity, other ground are public sets
Apply or plant area's life is personal etc.；The effective monitoring to product well not only can be realized, control and protection by this utility model, and
And the waste heat of high-temperature crude synthesis gas carried out reliable and effective reclaim and comprehensively utilize, significantly decrease cooling water amount and
Reduce the requirement that waste water downstream is processed, be truly realized coal comprehensive high-efficiency and utilize, reduce whole underground coal gasification(UCG) work
Skill（ISC）Energy consumption, finally solve existing coal underground gasifying technology（ISC）The technical barrier facing.
Brief description
Fig. 1 is the structural representation of the first implementation of the present utility model；
Fig. 2 is the structural representation of second implementation of the present utility model.
In figure：1st, product pipe, 1a, perforate product pipe pipeline section, 1b, complete product pipe pipeline section, 2, water cooling tube, 3, check-valves,
4th, nozzle, 5, jacket pipe, 6, metal to metal seal structure, 7, product casing, 8, high-temperature cement set, 9, measuring instrument system,
10th, measuring instrument splice port, 11, crude synthesis gas outlet, the outlet of circular passage between 12, product casing and jacket pipe,
13rd, the outlet of High Temperature High Pressure saturated vapor, 14, medium inlet, 15, ground waste-heat recovery device, 16, surface production technique,
17th, horizontal bore internal lining pipe.
Specific embodiment
Below by specific embodiment, and combine accompanying drawing, the technical solution of the utility model is made further specifically
Bright.
System of the present utility model specifically describes the building block including can buying in different suppliers, and specific sets
Meter and the part manufacturing.Innovation of the present utility model, the different qualities according to single part and special part and function, sieve
Select most suitable part and integrate out a set of exclusive device systems.
Embodiment 1：
As shown in Figure 1, a kind of waste heat recovery product well system for coal underground gasifying technology, based on coal underground
Gasification unit（ISC）Vertical waste heat recovery product well, described waste heat recovery product well system includes following assembly：
One well mouth hanger, is fixed at product well well head, for hanging the relevant group of waste heat recovery product well system
Part；
One product pipe 1, in product well, is freely suspended from well mouth hanger, and the end section of product pipe 1 is using opening
Hole is designed, and is provided with some pores, facilitates crude synthesis gas to enter product stream by pore and earthward exports；
One jacket pipe 5, is freely suspended from well mouth hanger, outside and concentric with product pipe 1 set positioned at product pipe 1
Put, form circular passage between jacket pipe 5 and product pipe 1, jacket pipe 5 end caliber is progressively decreased to tight with product pipe 1 outer wall
Contiguity is touched, and contact site forms a metal to metal seal structure 6；When continuous cooling water is injected in circular passage, with high temperature
Crude synthesis gas carry out heat exchange and form high pressure high temperature vapor, and steam flows to ground by circular passage, carries out waste heat recovery；
Water cooling tube 2, by eccentric well mouth hanger inner ring, parallel be freely suspended from by product pipe 1, and be located at jacket pipe
In 5, prevent for injection cooling water, unsaturated steam and/or anticorrosion toward in the circular passage between jacket pipe 5 and product pipe 1
Fouling medium, described water cooling tube 2 extends to circular passage bottom between jacket pipe 5 and product pipe 1, and water cooling tube 2 end is provided with spray
Mouth 4, is provided with check-valves 3 in water cooling tube 2, for maintaining in water cooling tube 2 water-column and preventing reverse steam from entering water cooling tube 2；
Cooling water injection rate is controlled by the crude synthesis gas temperature that product pipe 1 top measures it is ensured that crude synthesis gas temperature is less than setting
Temperature（300-350℃）；
Measuring instrument system 9, including distributed temperature sensor, pressure transducer and sonic sensor, described monitor
Table system 9 is fixed at product pipe 1 periphery, and is in the position contour with the nozzle 4 of water cooling tube 2, and described distributed temperature passes
Sensor is used for by monitoring product well downhole temperature and then controlling cooling water flow in water cooling tube 2, and distributed pressure sensor is used
Pressure in monitoring product well down-hole and jacket pipe 5, distributed acoustic wave sensor is used for monitoring product well down-hole emergency case, example
As sleeve pipe or product pipe damage（Cracking, bending etc.）, solid particle or liquid bolt enter product pipe and product blockage etc.；
Product casing 7, is formed with threadeding by high temperature resistant box cupling by some sections of product casing bodies, and passes through
High-temperature cement set 8 is fixed in the stratum of product well periphery, and described product casing 7 is as product pipe 1, jacket pipe 5, water cooling tube
2 and the shell of measuring instrument system 9, start to extend to coal seam near top from product well well head, remaining vertical coal bed drilling is not
Setting sleeve pipe, the annular channels between product casing 7 and jacket pipe 5 are as the standby pressure release passage of system exception running；
The wellhead equipment of high temperature high voltage resistant（Wherein pressure setting rated range meets lithostatic pressure and is defined, and temperature meets
180-350 DEG C of operating temperature range）, comprise at least one instrument pressed joint port 10, for connecting measuring instrument system
9；Also include at least four groups circulation passage ports and valve, the effect of described four groups of circulation passage ports and valve is as follows：First-class
As the crude synthesis gas outlet 11 in product pipe, a circulation passage port when circulation passage port and valve normally run for system
With valve is used for the outlet 12 as circular passage between product casing and jacket pipe, a circulation passage when system exception runs
As the outlet 13 of circular passage between jacket pipe 5 and product pipe 1 when port and valve normally run for system, logical for annular
High steam in road flows out, and a circulation passage port connects the medium inlet 14 of water cooling tube with valve, for toward water cooling tube
Interior injected media, described wellhead equipment is additionally provided with thermometer and pressure gauge, for directly displaying the temperature of each passage of well head
And pressure value, and data transmission device, for monitoring the situation of synthesis gas, high steam and cooling water distribution channel；
Ground waste-heat recovery device 15, connects wellhead equipment and supplies the circulation passage port of high steam outflow and for medium note
The circulation passage port entering, the waste heat that the High Temperature High Pressure saturated vapor in jacket pipe 5 is carried out is used for surface production technique
16（As air separation unit, air compressor, synthesic gas compressor, downstream purification or synthesis technique etc.）, steam turbine power generation or directly
Replacement Motor drive pump, boiler generating, other ground public utility or plant area live personal etc..
In this utility model, functioning primarily as of product pipe 1 cools down the main circulation that crude synthesis gas are transported to ground
Passage, high-temperature crude synthesis gas are cooled to the temperature of setting, the metal to metal seal of jacket pipe 5 and product pipe 1 through two ways
The leakage prevention structure leak of structure 6 is quenched the conduction of heat/exchange process in process and product pipe 1.By product pipe 1 with full of cooling
The jacket pipe 5 of water or steam can protect product casing 7, it is to avoid TRANSIENT HIGH TEMPERATURE changes, and is that product casing 7 provides slowly
Heating and the protection to web rot corrosion sour gas.The type selecting of product pipe 1 in product well and choice requirement are as follows：
（a）Product bore is determined according to the maximum productivity of each ISC unit（ID）Size.To meet synthesis gas
The maximum water leakage of the leakage prevention structure of big flow, maximum temperature and jacket pipe and product pipe metal to metal seal structure 6 will
Ask.
（b）According to design pressure in design pressure in free suspension weight, maximum product pipe and maximum jacket pipe（Saturation is steamed
Air pressure）Determine product pipe external diameter（OD）Size and wall thickness.Meet multiple underground work requirement simultaneously.
（c）Determine the maximum axial elongated distance that thermal expansion and free suspension deadweight cause.Guarantee that product pipe 1 has enough
Degree of freedom, prevents product pipe 1 from bending and perforate product pipe 1a enters in jacket pipe 5.
（d）According to the minimum load down operation production capacity of each ISC unit determine minimum synthesis gas range of flow and
Minimum oxidant injects range of flow.Synthesis gas velocity needs to carry liquid therein and solid impurity enough secretly to ground.
（e）The selection aspect of product pipe 1, inwall needs to meet high temperature web rot corrosion sour gas job requirements, and outer wall needs
Meet high temperature and high pressure steam job requirements.Material antiseptic mainly considers high temperature hydrogen burn into stress corrosion cracking（As hydrogen embrittlement or hydrogen
Cause cracking, sulfide-stress cracking, chloride stress cracking corrosion cracking etc.）, sour gas corrosion is (as CO2, H2S,
H2SO4, HCl, etc.), dew point corrosion, ammonium chloride and ammonium hydro sulfide burn into sulfidation corrosion, graphitic corrosion, dissimilar metal electrification rotten
Erosion etc..
（f）Perforate product pipe pipeline section 1a length is that 1-3 pipeline section is long（I.e. 6-18 rice）, the aperture of perforate is 5-35mm, opens
Hole accounts for the 5-35% of tube wall area with interval mode layout of interlocking, the perforate gross area.
In embodiment 1, system is based on vertical product well, and the top of product pipe 1 needs to install a part of height corrosion-resistant material
The perforate product pipe of material（Namely foregoing product pipe 1 is by complete product pipe pipeline section 1b and perforate product pipe pipeline section 1a group
Become）.In order to prevent the bending of product pipe 1 in gasification, after considering that its maximum heat is stretched, the end of perforate product pipe 1a can not
Contact with product bottom（Namely distance is more than zero）.Perforate product pipe size is more smaller than complete product pipe, is easy to completion mistake
In journey, the box cupling of perforate product pipe pipeline section 1a and complete product pipe pipeline section 1b connecting portion passes through the portion that jacket pipe 5 caliber reduces
Point.
This structure division such as can reduce the complete product pipe pipe of part using other replacement schemes in jacket pipe 5 caliber
Section 1b（With respect to perforate product pipeline section 1a, this section is no perforate design）From than product pipe 1 other parts pipeline section（Same sample ruler
Very little）Bigger size.
In this utility model, complete product pipe pipeline section 1b（I.e. non-perforate pipeline section）Corrosion resistance material from higher level
Material, gasification terminates rear recyclable and reuses；Box cupling positioned at metal to metal seal structure 6 position（Non- tube having holes
Section）Can be reused after sanding and polishing.
In this utility model, jacket pipe 5 is arranged in product casing 7.Its type selecting and choice requirement are as follows：
（a）The internal diameter (ID) of jacket pipe 5 is sufficiently large, can load product pipe 1, water cooling tube 2 and measuring instrument system 9.Chuck
Circular passage size between pipe 5 and these pipelines can produce enough steam, meets needed for the waste-heat recovery device of ground
Big steam requires.
（b）According to design pressure in free suspension weight, underground work requirement, maximum jacket pipe 5（Saturated vapour pressure）With
Maximum ISC unit operating pressure determines product pipe 1 external diameter（OD）Size and wall thickness.
（c）Jacket pipe 5 caliber reduces part and product pipe 1 is fitted close, and forms a metal to metal seal structure 6.Folder
The pipeline section inwall that sleeve pipe 5 caliber reduces part needs sanding and polishing to form a smooth surface so that product pipe 1 is more easy to enter well
Descend and improve the sealing of metal to metal seal structure 6.
（d）Determine the maximum axial elongated distance that thermal expansion and free suspension deadweight cause, to ensure metal to metal seal
Structure 6 is always on complete product pipe 1b（Non- perforate designs part）, prevent perforate product pipe 1a from entering in jacket pipe 5.
（e）The selection aspect of jacket pipe 5 meets high temperature and high pressure steam job requirements, and can provide good metal -- Au
Belong to the material of sealing property.
In this utility model, water cooling tube 2 is made up of following part：
The size of water cooling tube 2 meets its flow and the requirement of corresponding construction integrity（It is applied to water under high pressure and High Temperature High Pressure
Steam working environment）.Material aspect selects the material of rustless steel or higher level, and gasification reclaims after terminating and repeats to make
With.Water cooling tube 2 is located in jacket pipe 5, by well mouth hanger bias inner ring, parallel is freely suspended from by product pipe 1.Water cooling tube
2 tops will extend to jacket pipe 5 and reduce section bottom.
One check-valves 3 being provided with Opening pressure is arranged on water cooling tube 2.When ground cooling water injected system goes wrong
Water-column in pipe can be maintained, prevent reverse steam from entering water cooling tube.Simultaneously can be to folder when in water cooling tube 2, steam pressure is too high
Sleeve pipe 5 direction pressure release.In order to ensure the integrity of check-valves 3, check-valves 3 are arranged on the relatively low region of temperature（It is located at gold
Genus-shape metallic leak-proof structure 7 more than 1 pipeline section in top is long）.Meanwhile, preferably, multiple check-valves 3 can be installed,
Simultaneously using realizing standby functions.
Nozzle 4 device of water cooling tube 2 end can spray or spray enough cooling waters between product pipe 1 and jacket pipe 5
Circular passage in.Circulating condensing water after cooling water, waste heat recovery, unsaturated steam and additive/inhibitor（Anticorrosion is prevented
Fouling）Jacket pipe 5 is injected into by this pipe and is used as circulating coolant.
Cooling water（Steam）Cyclic process is as follows：Cooling water is injected into from product well wellhead equipment and passes through gold with product pipe 1
In the jacket pipe 5 that genus-metal sealing engages.Leakage prevention structure at metal to metal seal structure 6 for a small amount of water leaks into high temperature
Raw synthesis gas stream, the temperature that can slightly reduce crude synthesis gas plays part shock chilling function.In jacket pipe 5, injection water is changing
For forming the water column of certain altitude before steam.Steam after conversion enters ground waste-heat recovery device 15 by wellhead equipment, uses
In surface production technique 16（As steam turbine/boiler generating, steam heat-exchanger, other surface technology steamturbines etc.）Carry out heat
Can recycle.Finally, the condensed water after waste heat recovery is injected in jacket pipe 5 by wellhead equipment circulation.
In the present embodiment, the material of higher level selected by water cooling tube 2, and gasification terminates rear recyclable and reuses.
In this utility model, measuring instrument system 9 is fixed on complete product pipe pipeline section 1b（Non- perforate designs part）Top
End, the top of perforate product pipe 1a.The sensor of measuring instrument system 9 enters underground work after being placed in a protection sleeve pipe
Area, gasification terminates rear recyclable and reuses.Measuring instrument system 9 includes following functions：
The temperature on temperature sensor monitors product pipe 1 top, for controlling and adjusting the injection flow of cooling water, finally really
Protect and control the temperature of this position to be less than 300-350 DEG C of design temperature.The temperature of this position is simultaneously used for the safety system of whole technique
System, can cut off oxidant injection when this temperature exceedes security settings temperature at once.This utility model specifically adopts distributed
Temperature sensor, a distributed temperature sensor is arranged on product pipe 1 and is used for measuring the Temperature Distribution of whole product pipe, with
When can indicate cooling water liquid level in jacket pipe 5.
Pressure transducer is used for monitoring the down-hole pressure situation of product well using distributed sensor.Simultaneously it can be found that by
The extruding of the instrument system sheath causing in vapour pressure or operating pressure or damage.
Sonic sensor adopts distributed sensor.Can be used for monitoring and find product well down-hole emergency case, for example
Sleeve pipe or product pipe 1 damage（As cracking, bending etc.）, solid particle or liquid bolt enter product pipe 1 and product pipe 1 blocking etc..
Cooling boiling water in jacket pipe 5 can be monitored simultaneously（Bubbling）Position range, can determine that the height of cooling water level in jacket pipe 5
Degree.
In this utility model, product casing 7 includes following equipment and cementing method：
（a）Product casing 7 size need sufficiently large to dispose product pipe 1, jacket pipe 5, water cooling tube 2 and measuring instrument system
System 9（Such as 4.5 inches of product pipe, 8.625 inches of jacket pipe, 2 inches of water cooling tube, 0.75 inch of measuring instrument system, sleeve pipe
10.75 inches）.Simultaneously need to being determined in outer ring product according to situations such as the concrete feature such as water-bearing layer on stratum, unconsolidated formation
The quantity of casing 7 and size（Such as conduit 16-36 inch, surface pipe 13.375-20 inch, protective casing 9.625-
13.375 inch etc.）.
（b）The selection of product casing 7 wall thickness will meet drilling and well completion job requirements, and requirement simultaneously can be born more than quiet
The pressure of rock pressure.
（c）Product casing 7 box cupling, screw thread and cementing concrete set 8 select to meet the requirement of high temperature well working environment.Product
Casing 7 selection mainly for inner tubal wall as the annular channels of abnormal operation current path therefore, to assure that the whole production cycle
The integrity of interior well.This cycle includes the parking of ISC unit, equipment Removal and shut-in well disused well.
For the present embodiment based on vertical product well, product casing 78 is fixed to coal seam always by high-temperature cement set
Near top.For confined goods well, it is attached that product casing 7 is fixed to horizontal level in coal seam always by high-temperature cement set 8
Closely（The coal seam being directed to inclination angle is then fixed near the position parallel with seat earth）.
In this utility model, product well wellhead equipment will meet following functions and requirement：
（a）Wellhead equipment is suitable for high temperature well working environment, and in the case of maximum operating pressure, its operation temperature is up to 180-
350℃ .
（b）Wellhead equipment selection aspect, the exit region contacting with down-hole product considers solid/particle collision High Temperature High Pressure
Steam and the Working Environments of high temperature web rot corrosion sour gas.
Wellhead equipment comprises one or more measuring instrument ports and the down-hole such as corresponding synthesis gas, cooling water, steam
The import and export of product.
Wellhead equipment installs temperature, pressure gauge and the data transmission device that can directly display numerical value, even if to guarantee it
When his all systems are in fault or off-line state, also can direct situation in monitoring well.Temperature and pressure signal transmitting apparatus can
Data signal is fed back to control system simultaneously and be stored in data base.Wellhead temperature signal provides synthesis gas in product pipe 1
The temperature of steam in temperature and jacket pipe 5.When wellhead temperature reaches 280-350 DEG C of setting, system will automatically cut off oxidation
The injection of agent.Meanwhile, wellhead temperature also can as the serials control of cooling water flow to increase cooling water injection flow it is ensured that
Wellhead temperature is less than design temperature.Because well head pressure is consistently lower than down-hole pressure, therefore well head pressure signal data can be made
Instruction for down-hole product pipe 1 and jacket pipe 5 annular interval pressure.
Wellhead equipment removable renovation, reuse after shut-in well disused well.
In this utility model, ground waste-heat recovery device 15 connects the outlet of wellhead equipment high temperature and high pressure steam and cooling water note
Entrance.The heat that High Temperature High Pressure saturated vapor in jacket pipe 5 can be carried out by this ground waste-heat recovery device 15 is used for ground
Look unfamiliar production. art 16（As air separation unit, air compressor, synthesic gas compressor, downstream purification or synthesis technique etc.）, steam turbine
Generating or directly replacement Motor drive pump, boiler generating, other ground public utilities or plant area live personal etc.（As steam heat
Exchanger, heating etc.）.
As shown in figure 1, the working method of embodiment 1 is as follows：
High-temperature crude synthesis gas enter the boring of injection well horizontal seam and injection well horizontal bore internal lining pipe from ISC gasification zone
17, flow to the vertical coal bed drilling of product well.Afterwards, high-temperature crude synthesis gas enter perforate product pipe 1a and complete product pipe 1b, with
The cooling water by the injection of wellhead equipment cooling water inlet of its outer wall carries out heat exchange cooling.Cooling water is injected into water cooling tube 2,
Through check-valves 3 and nozzle 4, it is sprayed onto in the circular passage of jacket pipe 5 surrounding product pipe.In the end of jacket pipe 5, reduce
The diameter of jacket pipe 5 makes itself and product pipe 1 fluid-tight engagement form a metal to metal seal structure 6.So in jacket pipe 5
Enough cooling waters can be stored in portion circular passage and form the water column of certain altitude.Cooling water absorbs product pipe 1 and thick conjunction
Become the heat of gas, the crude synthesis gas in cooling product pipe 1.The water absorbing enough heats is converted into high temperature and high pressure steam by well head
Equipment steam (vapor) outlet enters into ground waste-heat recovery device 15, for steam turbine power generation, surface production technique or other public set
Apply.Condensed water after waste heat recovery passes through the circulation of wellhead equipment cooling water inlet and is injected into down-hole.The injection stream of cooling water
Amount is by the temperature sensor control being arranged on product pipe 1 it is ensured that the temperature of product pipe 1 is less than default temperature 300-350 DEG C
.Check-valves 3 are provided with an Opening pressure, can guarantee that the water-column in water cooling tube 2 in well head cooling water inlet no flow.
It is provided with leakage prevention structure at metal to metal seal mechanism 6, a small amount of cooling water leakage is had by leakage prevention structure and slightly closes to high temperature
Become gas and injection well horizontal bore internal lining pipe 17, can slightly reduce the temperature of crude synthesis gas.Product pipe 1, water cooling tube 2 and monitor
Table system 9 is arranged on inside jacket pipe 5.Jacket pipe 5 is in inside the concentric circular of product casing 7.This product casing 7 passes through
High-temperature cement set 8 is fixing in the earth formation, extends to coal seam near top from ground.Between product casing 7 and jacket pipe 5
Annular channels as system exception running standby pressure release passage, synthesis gas pass through wellhead equipment on synthesis gas ring shape lead to
Way outlet flows out.
Embodiment 2
As shown in Fig. 2 a kind of waste heat recovery product well system for coal underground gasifying technology, based on the coal ground therapeutic method to keep the adverse QI flowing downwards
Change the orientation waste heat recovery product well of unit, including vertical section, segmental arc and horizontal segment, described waste heat recovery product Jing Xitongbao
Include the assembly of assembly and technical requirements substantially with embodiment 1, difference is as follows：
（a）Described product pipe 1, jacket pipe 5, water cooling tube 2 and product casing 7 shape all with orientation waste heat recovery product well
Shape is consistent, namely all includes vertical section, segmental arc and horizontal segment, and the vertical section of product pipe 1, jacket pipe 5 and water cooling tube 2 all passes through
Well mouth hanger free suspension, bending section passes through product casing 7 bending section and supports, and horizontal component passes through product casing 7 water
Flat part supports；
（b）Measuring instrument system 9 is fixed on complete product pipe 1b（Non- perforate）Top, the rear of perforate product pipe 1a
（The present embodiment is based on confined goods well）.
（c）High-temperature cement set 8 terminates from segmental arc tail end, and described perforate product pipe pipeline section 1a covers 8 ends from high-temperature cement
Start, extend to the directional well top in the coal bed drilling of no high-temperature cement set 8, and horizontally disposed with injection well there is perforate
The horizontal bore internal lining pipe 17 of design intersects.Specifically, the present embodiment is based on confined goods well, and perforate product pipe 1a is from high temperature
Cement sheath 8 end（Jacket pipe 5 and product pipe 1 metal to metal seal structure 6 position rear）Start, extend through and no cover
Pipe coal bed drilling is intersected until the horizontal bore internal lining pipe 17 with injection well with perforate design.Perforate in coal bed drilling
Product pipe（Also referred to as product well water is opened flat in the hole bushing pipe 17）Major function be to prevent in gasification coal bed drilling avalanche to block up
Plug gasification tunnel.This horizontal bore internal lining pipe 17 is consumed with the process of coal underground gasifying technology simultaneously.Due in coal
It is consumed in underground gasification process, the selection of the horizontal bore internal lining pipe 17 in coal bed drilling is unimportant, general employing
Carbon steel pipe can meet requirement.Perforate product pipe pipeline section 1a in jacket pipe 5 needs to select high corrosion resistance material
Keep the integrity of product well.
As shown in Fig. 2 the working method of embodiment 2 is as follows：
The pipeline section that jacket pipe 5 caliber reduces is located in the flat no cement sleeve pipe of product well water.High-temperature crude synthesis gas gasify from ISC
Area is opened flat in the hole bushing pipe 17 by product well water and the boring of product well water level coal flows to product pipe 1 until ground.Product pipe 1 leads to
Cross a jacket pipe 5 containing water cooling tube 2 to cool down.In jacket pipe 5, cooling water absorbs the heat of product pipe 1 and crude synthesis gas
It is converted into high temperature and high pressure steam.Steam enters into ground waste-heat recovery device 15 by jacket pipe 5 circular passage afterwards, for vapour
Turbine generating, surface production technique 16 or other public utilities etc..For confined goods well, its product casing 7 passes through high temperature
Cement sheath 8 is fixing in the earth formation, extends to the position parallel to seat earth for the product casing 7 from ground.
Correlation properties that mentioned above " embodiment " inclusion describes in embodiments, structure, feature
All related to wherein at least one embodiment of the present utility model.Therefore, the above repeatedly refers to " an embodiment
In " place not all refer in particular to same embodiment.Additionally, the correlation properties describing in embodiments, structure, feature can
With one or more combinations in any suitable manner.
Claims (9)
1. it is used for the waste heat recovery product well system of coal underground gasifying technology, the vertical waste heat based on underground coal gasification(UCG) unit
Reclaim product well it is characterised in that：Described waste heat recovery product well system includes following assembly：
Well mouth hanger, is fixed at product well well head, for hanging the associated component of waste heat recovery product well system；
Product pipe（1）, in product well, it is freely suspended from well mouth hanger, product pipe（1）End section set using perforate
Meter, is provided with some pores, forms perforate product pipe pipeline section（1a）, remainder is complete product pipe pipeline section（1b）；
Jacket pipe（5）, it is freely suspended from well mouth hanger, positioned at product pipe（1）Outside and with product pipe（1）Concentric setting,
Jacket pipe（5）With product pipe（1）Between formed circular passage, jacket pipe（5）End caliber is progressively decreased to and product pipe（1）Outward
Wall is in close contact, and contact site forms a metal to metal seal structure（6）；
Water cooling tube（2）, by eccentric well mouth hanger inner ring, parallel it is freely suspended from product pipe（1）Side, and it is located at jacket pipe
（5）Interior, for toward jacket pipe（5）With product pipe（1）Between circular passage in injection cooling water, unsaturated steam and/or anti-
Corrosion good antiscale property medium, described water cooling tube（2）Extend to jacket pipe（5）With product pipe（1）Between circular passage bottom, water-cooled
Pipe（2）End is provided with nozzle（4）, water cooling tube（2）Inside it is provided with check-valves（3）, check-valves（3）For maintaining water cooling tube（2）Interior water
Pillar height degree and prevent reverse steam from entering water cooling tube（2）；
Measuring instrument system（9）, including distributed temperature sensor, pressure transducer and sonic sensor, described measuring instrument
System（9）It is fixed at product pipe（1）Periphery, and be in and water cooling tube（2）Nozzle（4）Contour position, described distributed
Temperature sensor is used for controlling water cooling tube by monitoring product well downhole temperature（2）Interior cooling water flow, distributed pressure senses
Device is used for monitoring product well down-hole and jacket pipe（5）Interior pressure, distributed acoustic wave sensor is used for monitoring the burst of product well down-hole
Situation；
Product casing（7）, by high-temperature cement set（8）It is fixed in the stratum of product well periphery, product casing（7）As
Product pipe（1）, jacket pipe（5）, water cooling tube（2）With measuring instrument system（9）Shell, start to extend to coal from product well well head
Layer top, product casing（7）With jacket pipe（5）Between annular channels as misoperation process standby pressure release passage；
The wellhead equipment of high temperature high voltage resistant, comprises at least one measuring instrument splice port（10）, for connecting measuring instrument system
System（9）；Also include at least four groups circulation passage ports and valve, wherein：One circulation passage port and valve are normal for system
Export as the crude synthesis gas in product pipe during operation（11）, a circulation passage port and valve are used for making when system exception runs
Outlet for circular passage between product casing and jacket pipe（12）, a circulation passage port and valve are normally transported for system
As the outlet of High Temperature High Pressure saturated vapor in circular passage between jacket pipe and product pipe during row（13）, a circulation passage port
Connect the medium inlet of water cooling tube with valve（14）, described wellhead equipment is additionally provided with thermometer and pressure gauge, for directly showing
Show the temperature and pressure numerical value of each passage of well head, and data transmission device, for monitoring synthesis gas, high steam and cooling water
The situation of distribution channel, and the data signal of each sensor acquisition is fed back to control system and is stored in data base；
Ground waste-heat recovery device（15）, connect product pipe（1）And jacket pipe（5）Between annular channel outlet and water cooling tube（2）
Inlet, by product pipe（1）And jacket pipe（5）Between the waste heat that is carried out of High Temperature High Pressure saturated vapor in circular passage use
In surface production technique（16）.
2. it is used for the waste heat recovery product well system of coal underground gasifying technology, the orientation waste heat based on underground coal gasification(UCG) unit
Reclaim product well, described orientation waste heat recovery product well include vertical section, segmental arc and horizontal segment it is characterised in that：Described remaining
Recuperation of heat product well system includes following assembly：
Well mouth hanger, is fixed at product well well head, for hanging the associated component of waste heat recovery product well system；
Product pipe（1）, in product well, product pipe（1）End section adopt perforate design, be provided with some pores, formed
Perforate product pipe pipeline section（1a）, remainder is complete product pipe pipeline section（1b）；
Jacket pipe（5）, positioned at product pipe（1）Outside and with product pipe（1）Concentric setting, jacket pipe（5）With product pipe（1）It
Between formed circular passage, jacket pipe（5）End caliber is progressively decreased to and product pipe（1）Outer wall is in close contact, contact site shape
Become a metal to metal seal structure（6）；
Water cooling tube（2）, parallel located at product pipe（1）Side, and it is located at jacket pipe（5）Interior, for toward jacket pipe（5）With product pipe
（1）Between circular passage in injection cooling water, unsaturated steam and/or anticorrosion good antiscale property medium, described water cooling tube（2）Prolong
Extend jacket pipe（5）With product pipe（1）Between circular passage bottom, water cooling tube（2）End is provided with nozzle（3）, water cooling tube（2）
Inside is provided with check-valves（4）, check-valves（4）For maintaining water cooling tube（2）Interior water-column and prevent reverse steam from entering water-cooled
Pipe（2）；
Measuring instrument system（9）, including distributed temperature sensor, pressure transducer and sonic sensor, described measuring instrument
System（9）It is fixed at product pipe（1）Periphery, and be in and water cooling tube（2）Nozzle（3）Contour position, described distributed
Temperature sensor is used for controlling water cooling tube by monitoring product well downhole temperature（2）Interior cooling water flow, distributed pressure senses
Device is used for monitoring product well down-hole and jacket pipe（5）Interior pressure, distributed acoustic wave sensor is used for monitoring the burst of product well down-hole
Situation；
Product casing（7）, by high-temperature cement set（8）It is fixed in the stratum of product well periphery, described product casing（7）
As product pipe（1）, jacket pipe（5）, water cooling tube（2）With measuring instrument system（9）Shell, from product well well head start extend
To coal seam, product casing（7）With jacket pipe（5）Between annular channels as system exception running standby pressure release
Passage；
The wellhead equipment of high temperature high voltage resistant, comprises at least one measuring instrument splice port（10）, for connecting measuring instrument system
System（9）；Also include at least four groups circulation passage ports and valve, wherein：One circulation passage port and valve are normal for system
Export as the crude synthesis gas in product pipe during operation（11）, a circulation passage port and valve are used for making when system exception runs
Outlet for circular passage between product casing and jacket pipe（12）, a circulation passage port and valve are normally transported for system
As the outlet of High Temperature High Pressure saturated vapor in circular passage between jacket pipe and product pipe during row（13）, a circulation passage port
Connect the medium inlet of water cooling tube with valve（14）, described wellhead equipment is additionally provided with thermometer and pressure gauge, for directly showing
Show the temperature and pressure numerical value of each passage of well head, and data transmission device, for monitoring synthesis gas, high steam and cooling water
The situation of distribution channel, and the data signal that each sensor is obtained feeds back to control system；
Ground waste-heat recovery device（15）, connect product pipe（1）And jacket pipe（5）Between annular channel outlet and water cooling tube（2）
Inlet, by product pipe（1）And jacket pipe（5）Between High Temperature High Pressure saturated vapor is carried out in circular passage waste heat be used for
Surface production technique（16）；
Described product pipe（1）, jacket pipe（5）, water cooling tube（2）With product casing（7）All with orientation waste heat recovery product well
Shape is consistent, all includes vertical section, segmental arc and horizontal segment, product pipe（1）, jacket pipe（5）And water cooling tube（2）Vertical section equal
By well mouth hanger free suspension, bending section passes through product casing（7）Bending section supports, and horizontal component passes through product well set
Pipe（7）Horizontal component supports；
Product casing（7）Vertical section and segmental arc pass through high-temperature cement set（8）It is fixed in the stratum of product well periphery, institute
State the self-produced QC of perforate product pipe pipeline section（1）Segmental arc end starts, and extends to the directional well top in no sleeve pipe coal bed drilling,
And with injection well horizontal bore internal lining pipe（17）Intersecting.
3. the waste heat recovery product well system for coal underground gasifying technology according to claim 1 and 2, its feature exists
In：Described perforate product pipe pipeline section（1a）Length is that 1-3 pipeline section is long, and the length of each pipeline section length is 6m, and the aperture of perforate is
5-35mm, perforate accounts for the 5-35% of tube wall area with interval mode layout of interlocking, the perforate gross area.
4. the waste heat recovery product well system for coal underground gasifying technology according to claim 1 it is characterised in that：
Described complete product pipe pipeline section（1b）With perforate product pipe pipeline section（1a）All processed using corrosion-resistant nickelic chromium alloy material,
Under maximum heat stretches situation, perforate product pipe pipeline section（1a）The distance between end and product bottom be more than zero.
5. the waste heat recovery product well system for coal underground gasifying technology according to claim 2 it is characterised in that：
Described complete product pipe pipeline section（1b）With perforate product pipe pipeline section（1a）All processed using corrosion-resistant nickelic chromium alloy material,
Horizontal bore internal lining pipe（17）Underground Coal Gasification Process can progressively consume, material selection carbon steel pipe.
6. the waste heat recovery product well system for coal underground gasifying technology according to claim 1 and 2, its feature exists
In：Described perforate product pipe pipeline section（1a）Diameter is less than complete product pipe pipeline section（1b）Diameter, in order to perforate in Completion Operations
Product pipe pipeline section（1a）With complete product pipe pipeline section（1b）Connecting portion box cupling passes through jacket pipe（5）Caliber reduces part；Or
Person is located at jacket pipe（5）Caliber reduces the complete product pipe pipeline section of part（1b）From ratio product pipe（1）Other parts pipeline section is straight
The big size in footpath.
7. the waste heat recovery product well system for coal underground gasifying technology according to claim 1 and 2, its feature exists
In：Under the maximum axial elongated distance situation that thermal expansion and free suspension deadweight cause, metal to metal seal structure（6）'s
Position is still located at complete product pipe pipeline section（1b）.
8. the waste heat recovery product well system for coal underground gasifying technology according to claim 1 and 2, its feature exists
In：Described check-valves（4）The low temperature of 1-3 pipeline section length above perforate product pipe pipeline section with complete product pipe pipeline section joint
Zone position, the length of each pipeline section length is 6m, check-valves（4）It is provided with several, realizes multiple protection functions, maintain water column suitable
Height and prevent high pressure high temperature vapor reveal.
9. the waste heat recovery product well system for coal underground gasifying technology according to claim 7 it is characterised in that：
Metal to metal seal structure（6）With product pipe（1）Contact portion between there is suitable gap structure, cooling water is from water-cooled
Pipe（2）It is injected into product pipe（1）With jacket pipe（5）Between after, a small amount of water passes through metal to metal seal structure（6）The seam at place
High-temperature crude synthesis gas stream is leaked into, to play the temperature that part shock chilling function reduces crude synthesis gas at gap structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620929802.5U CN205990904U (en) | 2016-08-24 | 2016-08-24 | Waste heat recovery product well system for coal underground gasifying technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620929802.5U CN205990904U (en) | 2016-08-24 | 2016-08-24 | Waste heat recovery product well system for coal underground gasifying technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205990904U true CN205990904U (en) | 2017-03-01 |
Family
ID=58107113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620929802.5U Withdrawn - After Issue CN205990904U (en) | 2016-08-24 | 2016-08-24 | Waste heat recovery product well system for coal underground gasifying technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN205990904U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121617A (en) * | 2016-08-24 | 2016-11-16 | 中为(上海)能源技术有限公司 | Waste heat recovery product well system and operational approach for coal underground gasifying technology |
| CN109740203A (en) * | 2018-12-18 | 2019-05-10 | 新疆贝肯能源工程股份有限公司 | Orientation trajectory design method for underground heat well development |
| CN111022026A (en) * | 2020-01-03 | 2020-04-17 | 中国矿业大学 | Waste heat power generation device and method used in underground coal gasification process |
| CN113452880A (en) * | 2021-06-08 | 2021-09-28 | 常州大学 | Underground video detection device suitable for high-temperature geothermal well and control method thereof |
| CN114592813A (en) * | 2022-04-18 | 2022-06-07 | 大庆长垣能源科技有限公司 | Well washing device for screen pipe well completion |
| WO2023124897A1 (en) * | 2021-12-27 | 2023-07-06 | 中国石油天然气集团有限公司 | Annulus water injection distributed spray cooling method for high-temperature underground gas |
-
2016
- 2016-08-24 CN CN201620929802.5U patent/CN205990904U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121617A (en) * | 2016-08-24 | 2016-11-16 | 中为(上海)能源技术有限公司 | Waste heat recovery product well system and operational approach for coal underground gasifying technology |
| CN109740203A (en) * | 2018-12-18 | 2019-05-10 | 新疆贝肯能源工程股份有限公司 | Orientation trajectory design method for underground heat well development |
| CN111022026A (en) * | 2020-01-03 | 2020-04-17 | 中国矿业大学 | Waste heat power generation device and method used in underground coal gasification process |
| CN113452880A (en) * | 2021-06-08 | 2021-09-28 | 常州大学 | Underground video detection device suitable for high-temperature geothermal well and control method thereof |
| WO2023124897A1 (en) * | 2021-12-27 | 2023-07-06 | 中国石油天然气集团有限公司 | Annulus water injection distributed spray cooling method for high-temperature underground gas |
| CN114592813A (en) * | 2022-04-18 | 2022-06-07 | 大庆长垣能源科技有限公司 | Well washing device for screen pipe well completion |
| CN114592813B (en) * | 2022-04-18 | 2023-11-21 | 大庆长垣能源科技有限公司 | Well flushing device for screen pipe well completion |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170301 Effective date of abandoning: 20190108 |