CN104533377A - Nozzle and gasification method thereof - Google Patents
Nozzle and gasification method thereof Download PDFInfo
- Publication number
- CN104533377A CN104533377A CN201410623634.2A CN201410623634A CN104533377A CN 104533377 A CN104533377 A CN 104533377A CN 201410623634 A CN201410623634 A CN 201410623634A CN 104533377 A CN104533377 A CN 104533377A
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- China
- Prior art keywords
- nozzle
- water
- water injection
- gasification
- pipe
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention provides a nozzle and an injection method thereof. The nozzle comprises a nozzle body which is of a casing structure; the nozzle comprises a center tube and an outer ring casing, wherein the cross section of the center tube is in an annular shape and the cross section of the outer ring casing is in an annular shape; the tail end of the center tube is of a conical structure which gradually retracts and the tail end of the outer ring casing is of a conical structure which gradually retracts to form a nozzle top cap; the nozzle top cap is provided with an air injection opening which is communicated with the center tube; the side wall of the outer ring casing is provided with a plurality of water injection holes; an oxygen contained gasification agent is accessed into the center tube and the water or a water solution is accessed into the outer ring casing in the gasification process; the water or the water solution enters a gasification furnace from the water injection holes formed in the side wall of the outer ring casing and water injection holes formed in the nozzle top cap. According to the nozzle and the gasification method thereof, the water injection and the cooling of the nozzle can be achieved in an integrated mode and accordingly the water required by the water gas reaction is effectively provided, meanwhile the nozzle can be effectively cooled, and the heated condition of the nozzle can be speculated through the changes of the water injection pressure so as to adjust the gasification process.
Description
Technical field
The present invention relates to underground coal gasification(UCG) field, more specifically, relate to a kind of nozzle and gasification process.
Background technology
Coal underground gasification technology is a kind of emerging coal chemical technology, and wherein decanting point fallback techniques is owing to having good controllability, and effectively can reduce drilling hole amount, is paid close attention to widely.Undertaken in the process of Coal Gasification by this technology, in the gasification tunnel in coal seam, oxygen-containing gas is injected by air injection pipe, oxygen-containing gas sprays and reacts with surrounding coal seam from the nozzle of air injection pipe, along with the generation of high heat, to be subject to before gasification furnace pressure, nozzle ambient oxygen concentration and nozzle the factor impacts such as lime-ash obstruction, easily cause air injection pipe and nozzle fusing or damage, and then affecting the stability of gasification.
Chinese patent 201420299991.3 discloses a kind of underground coal gasification(UCG) nozzle, and described nozzle comprises nozzle body, offers main venthole in nozzle body, sidewall also offers the side direction venthole be communicated with main venthole.Although it is by spraying gasifying agent from side direction venthole, the ash after coal seam only can be stoped to burn in gasification is attached to nozzle side, can not solve this height of nozzle heat problem.
Summary of the invention
Technical problem to be solved by this invention is to provide one can solve this height of nozzle heat, avoids the nozzle that nozzle damages.
Another technical problem to be solved by this invention is to provide a kind of coal underground gasification method.
For achieving the above object, nozzle of the present invention, comprise nozzle body, described nozzle body is sleeve structure, comprise central tube and outer shroud sleeve pipe that cross section is ring-type, the end of central tube and outer shroud sleeve pipe adopts tapering type pyramidal structure, forms nozzle top cap, nozzle top cap is provided with the gas injection port be communicated with central tube, and the sidewall of described outer shroud sleeve pipe is provided with multiple hole for water spraying.
Preferably, described nozzle also includes water injection pipe and air injection pipe, and described water injection pipe is communicated with outer shroud sleeve pipe, and described air injection pipe is communicated with central tube.
Preferably, described water injection pipe is provided with device for detecting water pressure.
Preferably, described water injection pipe is connected with outer shroud sleeve pipe by adapter sleeve, and described air injection pipe is communicated with central tube by the gap of adapter sleeve.
Preferably, described nozzle also includes at least one thermocouple wire, and the point for measuring temperature of described thermocouple wire is arranged on central tube.
Preferably, described gas injection port outer peripheral edge on the cap of nozzle top is provided with multiple hole for water spraying.
For method for implanting of the present invention, comprising: in gasification, pass into oxygenous agent in central tube, pass into water or the aqueous solution outside in eyelet thimble, described water or the aqueous solution enter gasification furnace from the hole for water spraying of outer shroud sleeve side walls.
Preferably, in gasification, when nozzle temperature being detected more than 100 DEG C, detect the change of the gas composition of underground gasification outlet of still further.
If gas composition declines be less than 10%, increase water injection rate.
If gas composition declines be more than or equal to 10%, moving nozzle position backward.
Preferably, the water injection rate of increase is the 10%-30% of normal water injection rate.
Preferably, the method also comprises: preset a normal pressure value and an abnormal pressure value; In gasification, by the outside eyelet thimble conveying water of water injection pipe or the aqueous solution, detect the actual pressure value of water in described water injection pipe, when actual pressure value reaches abnormal pressure value, increase water injection rate and/or the moving nozzle position backward of 10%-30%, until actual pressure value returns to normal pressure value.
Preferably, the method also comprises: described abnormal pressure value is 110% of normal pressure value.
Preferably, the method also comprises: inject gasification furnace the water yield can gasification furnace water requirement V ± 30% scope in fluctuate.
Beneficial effect of the present invention is: because the present invention adopts the nozzle arrangements of central tube and outer shroud sleeve pipe with holes, water filling and cooling integration are completed, water required for water gas reaction is not only effectively provided, these water can walk heat by effetive zone simultaneously, cooling jet, improves the application life of nozzle.In addition, infer the situation of being heated of nozzle by the variation in water pressure detected in the variations in temperature at nozzle place, the change of coal gas component and water injection pipe simultaneously, and adjust gasifying process in real time according to the situation of being heated, can more effective protection nozzle.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for manual, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the structural representation of nozzle first embodiment of the present invention;
Fig. 2 is the structural representation of nozzle first embodiment ascending pipe of the present invention and nozzle body junction;
Fig. 3 is the structural representation of nozzle first embodiment nozzle top of the present invention cap;
Fig. 4 is the structural representation of nozzle second embodiment of the present invention and the 3rd embodiment ascending pipe and nozzle body junction;
Fig. 5 is the structural representation of nozzle second embodiment of the present invention and the 3rd embodiment nozzle top cap;
Fig. 6 is the structural representation of nozzle of the present invention 4th embodiment;
Fig. 7 is the structural representation of nozzle of the present invention 4th embodiment ascending pipe and nozzle body junction;
Description of reference numerals
10 nozzle body 11 central tube 12 outer shroud sleeve pipes
13 nozzle top cap 14 gas injection port 15,16 hole for water sprayings
17 point for measuring temperature 20 ascending pipe 21 air injection pipe
22 water injection pipe 23 thermocouple wire 24 device for detecting water pressure
25 adapter sleeve 26 tube connectors
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to the direction as shown in Figure of description.
Please refer to Fig. 1 and Fig. 2, nozzle of the present invention comprises nozzle body 10, nozzle body 10 is sleeve structure, comprise central tube 11 and outer shroud sleeve pipe 12 that cross section is ring-type, the end of central tube 11 and outer shroud sleeve pipe 12 adopts tapering type pyramidal structure, form nozzle top cap 13, nozzle top cap 13 is provided with the gas injection port 14 be communicated with central tube 11, and the sidewall of described outer shroud sleeve pipe 12 is provided with multiple hole for water spraying 16.
Wherein, central tube 11 is oxygenous agent passage, and outer shroud sleeve pipe 12 is cooling-water duct, as shown in Figure 3, gas injection port 14 be arranged on nozzle top cap 13 just to the position of central tube nozzle.
In addition, multiple hole for water spraying 15 can also be provided with on the outer peripheral edge of the gas injection port 14 of nozzle top cap 13, although the sidewall of eyelet thimble 12 is outside provided with multiple hole for water spraying 16, can realize object of the present invention, but multiple hole for water spraying 15 is set on nozzle top cap 13 again, cooling effect of the present invention can be improved further.
This nozzle also comprises ascending pipe 20, is connected to nozzle body 10, is provided with air injection pipe 21, water injection pipe 22 and at least one thermocouple wire 23 in this ascending pipe 20 by the mode of welding or screw thread.This water injection pipe 22 is connected with outer shroud pipe box 12 by adapter sleeve 25, for will gasification and cooling water or the aqueous solution (aqueous solution refers to liquid, aqueous, hereinafter be referred to as " water ") be transported in outer shroud pipe box 12, described water is sprayed by the hole for water spraying 15 on the hole for water spraying 16 on outer shroud pipe box 12 sidewall and nozzle top cap 13.This air injection pipe 21 is connected with central tube 11 by the gap of adapter sleeve 25, for carrying oxygen containing gasifying agent.
This water injection pipe 22 described is provided with device for detecting water pressure 24, and the hydraulic pressure force value in water injection pipe 22 is sent in surface water pressure control system and/pressure-display device by device for detecting water pressure 24.One end of thermocouple wire 23 in ascending pipe 20 is connected to the central tube 11 on nozzle body 13, forms point for measuring temperature 17, in the temperature control system that the other end is connected to ground and/or temperature indicating device.
It is to be noted, the hole for water spraying quantity be arranged on nozzle top cap 13 to change, the quantity of preferred hole for water spraying is 6 ~ 12, the hole for water spraying quantity be arranged on outer shroud sleeve pipe 12 sidewall to change, the quantity of preferred hole for water spraying is 4 ~ 6 row, hole for water spraying distribution mode on nozzle top cap 13 and on its outer shroud sleeve pipe 12 sidewall can be that to be uniformly distributed also can be uneven distribution, is preferably even distribution pattern.
When gasifying coal seam, by air injection pipe 21, oxygen-containing gas is injected gasification furnace, by water injection pipe 22 water filling in outer shroud sleeve pipe 12, these water play the object of cooling jet on the one hand, these water enter gasification furnace by the hole for water spraying 15,16 of outer shroud sleeve pipe 12 and nozzle top cap 13 on the other hand, complete water gas reaction.
The water injecting gasification furnace can control according to gasification furnace water requirement, and gasification furnace water requirement V design formulas is as follows:
V=MC × α-9 (H goes out-H coal)
MC---carbon amount in Coal-fired capacity
H goes out---hydrogen content in outlet coal gas
H coal---hydrogen content in Coal-fired capacity
α---preset steam/hydrocarbons ratio inject gasification furnace the water yield can gasification furnace water requirement ± 30% scope in fluctuate.
In the process of water injection pipe to gasification furnace water filling, device for detecting water pressure 24 detects the pressure in water injection pipe 22, under normal circumstances, when there is not larger change in condition in gasification furnace, pressure in water injection pipe 22 can not change suddenly, but when if the outer temperature of nozzle significantly raises, steam can be become very soon from the water of hole for water spraying ejection, volume expands, cause the pressure in water injection pipe 22 to raise, device for detecting water pressure 24 by the pressure signal transmission in water injection pipe to ground control unit and/or display unit.
In gasification, if thermocouple 23 detects that the temperature at nozzle place is more than 100 DEG C, just detect the situation of change of the gas composition of underground gasification outlet of still further, if gas composition declines be less than 10%, then increase water filling, the water injection rate of increase is the 10%-30% of normal water injection rate; If gas composition declines be more than or equal to 10%, moving nozzle position backward.
In gasification, by the outside eyelet thimble conveying water of water injection pipe or the aqueous solution, when water in described water injection pipe or aqueous solution actual pressure value exceed 110% of normal pressure value, then increase water injection rate to the 110%-130% of normal water injection rate and/or moving nozzle position backward, until actual pressure value returns to normal pressure value.Specific embodiment one
As shown in Figures 2 and 3, in the present embodiment, outer shroud sleeve pipe 12 is connected by adapter sleeve 25 with water injection pipe 22, and three tube connectors 26 that adapter sleeve 25 is 120 ° for angle form, and are connected with outer shroud sleeve pipe 12 by this tube connector 26.Cap 13 outer peripheral edge is provided with 6 hole for water sprayings on nozzle top, outer shroud sleeve pipe 12 sidewall is arranged 4 row hole for water sprayings 6, often arranges with 90 ° of pitch arrangement.
Specific embodiment two
As shown in Figure 4 and Figure 5, in the present embodiment, outer shroud sleeve pipe 12 is connected by adapter sleeve 25 with water injection pipe 22, and four tube connectors 26 that adapter sleeve 25 is 90 ° for angle form, and are connected with outer shroud sleeve pipe 12 by this tube connector 26.Cap 13 outer peripheral edge is provided with 12 hole for water sprayings on nozzle top, outer shroud sleeve pipe 12 sidewall is arranged 6 row hole for water sprayings 6, often arranges with 60 ° of pitch arrangement.
Specific embodiment three
As shown in Figure 4 and Figure 5, in the present embodiment, outer shroud sleeve pipe 12 is connected by adapter sleeve 25 with water injection pipe 22, and four tube connectors 26 that adapter sleeve 25 is 90 ° for angle form, and are connected with outer shroud sleeve pipe 12 by this tube connector 26.Cap 13 outer peripheral edge is provided with 12 hole for water sprayings on nozzle top, outer shroud sleeve pipe 12 sidewall is arranged 6 row hole for water sprayings 6, often arranges with 60 ° of pitch arrangement.
In this gasification, water injection pressure is 0.5MPa, normal fluctuation is 5%, namely pressure is in 0.5 ± 0.025MPa, if the pressure oscillation of water filling is more than 0.05MPa, then think that leading portion nozzle place is subject to the impact of high temperature, need increase 10%-30% water filling flow or backward moving nozzle position until pressure recover is normal.
Specific embodiment four
As shown in Figure 6 and Figure 7, in the present embodiment, outer shroud sleeve pipe 12 is connected by adapter sleeve 25 with water injection pipe 22, adapter sleeve 25 is the steel bushing of a taper, be angle 60 ° with nozzle throat area, 6 water injection holes are had to be communicated with the outer shroud sleeve pipe 12 of nozzle in the middle of adapter sleeve 25, can by the gasifying agent injected in the gap of adapter sleeve 25.Cap 13 outer peripheral edge is provided with 6 hole for water sprayings on nozzle top, outer shroud sleeve pipe 12 sidewall is arranged 4 row hole for water sprayings 6, often arranges with 90 ° of pitch arrangement.
In this gasification, water injection pressure is 1.5MPa, normal fluctuation is 8%, namely pressure is in 1.5 ± 0.12MPa, if the pressure oscillation of water filling is more than 0.15MPa, then think that leading portion nozzle place is subject to the impact of high temperature, need increase 10%-30% water filling flow or backward moving nozzle position until pressure recover is normal.Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. a nozzle, comprise nozzle body, it is characterized in that: described nozzle body is sleeve structure, comprise central tube and outer shroud sleeve pipe that cross section is ring-type, the end of central tube and outer shroud sleeve pipe adopts tapering type pyramidal structure, form nozzle top cap, nozzle top cap is provided with the gas injection port be communicated with central tube, and the sidewall of described outer shroud sleeve pipe is provided with multiple hole for water spraying.
2. nozzle as claimed in claim 1, it is characterized in that: described nozzle also includes water injection pipe and air injection pipe, described water injection pipe is communicated with outer shroud sleeve pipe, and described air injection pipe is communicated with central tube.
3. nozzle as claimed in claim 2, is characterized in that: described water injection pipe is provided with device for detecting water pressure.
4. nozzle as claimed in claim 2, is characterized in that: described water injection pipe is connected with outer shroud sleeve pipe by adapter sleeve, and described air injection pipe is communicated with central tube by the gap of adapter sleeve.
5. nozzle as claimed in claim 1, it is characterized in that: described nozzle also includes at least one thermocouple wire, the point for measuring temperature of described thermocouple wire is arranged on central tube.
6. nozzle as claimed in claim 1, is characterized in that: the gas injection port outer peripheral edge on the cap of described nozzle top is provided with multiple hole for water spraying.
7. have a method for implanting for the arbitrary structure nozzle of claim 1-6, it is characterized in that: in gasification, pass into oxygenous agent in central tube, pass into water or the aqueous solution outside in eyelet thimble, described water or the aqueous solution enter gasification furnace from hole for water spraying.
8. method for implanting as claimed in claim 7, is characterized in that: in gasification, when nozzle temperature is more than 100 DEG C,
If the gas composition of underground gasification outlet of still declines be less than 10%, then increase water injection rate;
If the gas composition of underground gasification outlet of still declines be more than or equal to 10%, then moving nozzle position backward.
9. method for implanting as claimed in claim 8, is characterized in that: the water injection rate of increase is the 10%-30% of normal water injection rate.
10. method for implanting as claimed in claim 7, is characterized in that, comprising:
In gasification, by the outside eyelet thimble conveying water of water injection pipe or the aqueous solution, when water in described water injection pipe or aqueous solution actual pressure value exceed 110% of normal pressure value, then increase water injection rate to the 110%-130% of normal water injection rate and/or moving nozzle position backward, until actual pressure value returns to normal pressure value.
11. method for implanting as claimed in claim 7, is characterized in that, inject the water yield of gasification furnace be gasification furnace water requirement ± 30% scope in.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410623634.2A CN104533377A (en) | 2014-11-06 | 2014-11-06 | Nozzle and gasification method thereof |
| PCT/CN2015/091873 WO2016070700A1 (en) | 2014-11-06 | 2015-10-13 | Nozzle and injection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410623634.2A CN104533377A (en) | 2014-11-06 | 2014-11-06 | Nozzle and gasification method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104533377A true CN104533377A (en) | 2015-04-22 |
Family
ID=52848977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410623634.2A Pending CN104533377A (en) | 2014-11-06 | 2014-11-06 | Nozzle and gasification method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104533377A (en) |
| WO (1) | WO2016070700A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632179A (en) * | 2015-01-28 | 2015-05-20 | 新奥气化采煤有限公司 | Nozzle |
| CN104632181A (en) * | 2015-02-03 | 2015-05-20 | 新奥气化采煤有限公司 | Nozzle |
| CN105041291A (en) * | 2015-06-12 | 2015-11-11 | 新奥气化采煤有限公司 | Spray nozzle |
| WO2016070700A1 (en) * | 2014-11-06 | 2016-05-12 | 新奥气化采煤有限公司 | Nozzle and injection method |
| CN106761653A (en) * | 2017-01-12 | 2017-05-31 | 中为(上海)能源技术有限公司 | For the shower nozzle equipment and its operating method of coal underground gasifying technology |
| CN110318726A (en) * | 2019-08-23 | 2019-10-11 | 新疆国利衡清洁能源科技有限公司 | Nozzle and continuous pipe device for underground coal gasification(UCG) |
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| US4512403A (en) * | 1980-08-01 | 1985-04-23 | Air Products And Chemicals, Inc. | In situ coal gasification |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016070700A1 (en) * | 2014-11-06 | 2016-05-12 | 新奥气化采煤有限公司 | Nozzle and injection method |
| CN104632179A (en) * | 2015-01-28 | 2015-05-20 | 新奥气化采煤有限公司 | Nozzle |
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| US11066916B2 (en) | 2017-01-12 | 2021-07-20 | Zhongwei (Shanghai) Energy Technology Co. Ltd | Nozzle and injection device for use in underground coal gasification process and method for operating injection device |
| CN106761653B (en) * | 2017-01-12 | 2023-03-14 | 中为(上海)能源技术有限公司 | Nozzle equipment for coal underground gasification process and operation method thereof |
| CN110318726A (en) * | 2019-08-23 | 2019-10-11 | 新疆国利衡清洁能源科技有限公司 | Nozzle and continuous pipe device for underground coal gasification(UCG) |
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|---|---|
| WO2016070700A1 (en) | 2016-05-12 |
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Effective date of registration: 20170207 Address after: 065001 Hebei economic and Technological Development Zone, Langfang science and Technology Park in the Southern District of B building, room 522 Applicant after: ENN SCIENCE & TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: The 065001 Hebei economic and Technological Development Zone of Langfang Huaxiang Xinyuan host new Austrian Science and Technology Park in Southern District Applicant before: ENN Coal Gasification Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150422 |