CN108443239B - Multifunctional static injection device - Google Patents
Multifunctional static injection device Download PDFInfo
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- CN108443239B CN108443239B CN201810322024.7A CN201810322024A CN108443239B CN 108443239 B CN108443239 B CN 108443239B CN 201810322024 A CN201810322024 A CN 201810322024A CN 108443239 B CN108443239 B CN 108443239B
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- static
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- 230000003068 static effect Effects 0.000 title claims abstract description 35
- 238000002347 injection Methods 0.000 title claims description 23
- 239000007924 injection Substances 0.000 title claims description 23
- 239000012530 fluid Substances 0.000 claims abstract description 61
- 230000008602 contraction Effects 0.000 claims description 40
- 238000009792 diffusion process Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 24
- 239000003345 natural gas Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 15
- 238000011161 development Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- -1 coalbed methane Chemical compound 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
A multifunctional static ejection device belongs to the technical field of ejecting low-pressure fluid by using high-pressure fluid. The multifunctional static ejector increases the pressure grade number of the low-pressure fluid inlet by increasing the number of low-pressure fluid, reduces the energy loss at the low-pressure fluid inlet, improves the gathering and transportation efficiency of unconventional natural gas, and reduces the gathering and transportation cost. The axial flow and the rotational flow realize the axial and circumferential momentum exchange of different fluids during mixing, and compared with the single-direction momentum exchange of the traditional ejector, the mixing effect of the fluids is better. The shape of the static swirl blades enables the axial flowing fluid flowing through the static swirl blades to generate swirl, an auxiliary power supply device is not needed to be additionally arranged, and the self performance can be adjusted by changing different swirl blades. In order to meet the requirements of more working conditions, the ejector can be switched to traditional speed type ejection or rotational flow type ejection through adjustment of pipelines and components to complete ejection of single fluid.
Description
Technical Field
The invention relates to a multifunctional static ejection device, and belongs to the technical field of ejection of low-pressure fluid by high-pressure fluid.
Background
The development and utilization of unconventional natural gas such as coalbed methane, shale gas and the like can generate huge economic benefits, are beneficial to safety and environmental protection, but also have a certain bottleneck problem. At present, most coalbed methane single well in China has smaller gas yield, and shale gas wells have larger gas yield but faster attenuation. The average daily production per well is statistically less than 800 cubic meters, even less than 500 cubic meters, for blocks on the scale of hundreds or thousands of wells. Some block gas wells have higher initial production rates, but within 1-3 years, the average daily production per well drops to only a few hundred cubic meters. Because the ratio of the rapid attenuation block to the low-yield block in the unconventional natural gas block in the development stage is large, whether the pressure of different gas wells can be reasonably utilized to realize the efficient gathering and transportation of unconventional natural gas is a key problem restricting the industry.
The traditional ejector belongs to speed type ejection, the purpose of sucking single-strand high-pressure fluid by single-strand high-pressure fluid is realized by means of the characteristic of low pressure of fluid flowing at high speed, the range of applicable working conditions is smaller, the corresponding ejector needs to be designed aiming at the actual working conditions of different wellheads, the exploitation cost is undoubtedly increased for unconventional natural gas with small single-well yield, and the requirement of low-cost development cannot be met. The non-conventional natural gas of a plurality of low-pressure wellheads is concentrated and conveyed by a single ejector, and because of the large difference of pressure among different low-pressure wellheads, the design of a concentrated and conveyed pipeline can only be carried out aiming at the wellhead with the lowest pressure level, and the energy loss caused by the fact that the pressure of other gas wells is higher than the pressure level of the concentrated and conveyed pipeline at an inlet is large, so that high-efficiency concentrated and conveyed cannot be realized. Therefore, the traditional ejector is limited in large-scale use in the field of unconventional natural gas gathering and transportation such as coal bed gas, shale gas and the like.
The patent number 2015102865890 discloses a dynamic strong cyclone ejector which provides a function of sucking single low-pressure gas by means of low-pressure compaction formed by cyclone. The circular seam ejector with the patent number of 201710278955.7 realizes the function of sucking single low-pressure gas by means of a vacuum environment formed by circular high-speed air flow. The core of the injection devices is to inject single-strand low-pressure fluid by utilizing single-strand high-pressure fluid, so that reasonable utilization of pressure energy of gas collection and transmission bodies with different pressure grades cannot be considered, and certain energy loss is caused. Although the problem can be solved by connecting a plurality of injection devices in series, the equipment and the pipelines are complex, the cost is increased, and the low-cost gathering and transportation requirement of unconventional natural gas cannot be met, so that the research and development of the multifunctional injection device for injecting a plurality of low-pressure fluids by using a single high-pressure fluid has better application value.
Disclosure of Invention
The invention discloses a multifunctional static ejector, which adopts a pressure classification method for low-pressure fluid with different pressure grades on the premise of keeping the ejector function of a traditional static ejector on single-fluid, so that the low-pressure fluid with different pressures enters equipment through a collecting and conveying pipeline corresponding to the pressure grades, the pressure energy loss caused by the fact that the pressure of the low-pressure fluid is higher than the pressure grade of the pipeline when the low-pressure fluid flows through the collecting and conveying pipeline can be avoided, the collecting and conveying efficiency of unconventional natural gas is improved, and the development cost of the ejector is reduced. The multi-strand low-pressure fluid with different pressure grades is sucked into the device by a low-pressure area formed by axial high-speed flow and high-speed rotational flow of one strand of high-pressure fluid or mixed fluid of the high-pressure fluid and the low-pressure fluid, and energy exchange is carried out, so that the function of jetting the multi-strand low-pressure fluid by a single strand of high-pressure fluid is realized. The single equipment of the multifunctional static injection device can realize the parallel connection function of a plurality of traditional ejectors, thereby avoiding the problems of complex pipeline process, high equipment cost, large occupied area and the like in the injection process of gases with various pressure grades and having better application value.
In addition, when the device only opens one of the low-pressure inlets, the device is equivalent to the scheme of injecting single fluid by single fluid of the traditional injector, and has the function of one machine with multiple purposes.
The technical scheme adopted by the invention is as follows: the utility model provides a multi-functional static injection device, it includes afterbody shrink section, throat pipe and diffusion section, characterized by: the high-pressure inlet section, each stage of contraction section, the mixing section, the tail contraction section, the throat pipe and the diffusion section are sequentially and coaxially connected in a sealing manner to form a main body of the injection device; a first-stage inclined low-pressure air inlet pipe communicated with the main body is arranged outside the first-stage mixing section, a second-stage inclined low-pressure air inlet pipe communicated with the main body is arranged outside the second-stage mixing section, and an axial low-pressure air inlet pipe and a static cyclone blade are arranged in the main body; the inner diameters of the contraction sections of each stage are gradually reduced along the axial direction, the inclined low-pressure air inlet pipes of each stage are arranged at the small inner diameter outlets close to the contraction sections of the corresponding stages, the static cyclone blades are arranged at the tail end of the final-stage mixing section, the outlet ends of the axial low-pressure air inlet pipes are arranged at the connection positions of the final-stage mixing section and the tail contraction sections, the inner diameters of the throat pipes are larger than the inner diameters of the axial low-pressure air inlet pipes, and the inner diameters of the outlets of the diffusion sections are larger than the inner diameters of the inlets of the high-pressure inlet sections.
The inclined low-pressure air inlet pipes of all stages adopt annular structures communicated with the inlet ends of the corresponding mixing sections of all stages.
The high-pressure fluid between the main body and the axial low-pressure air inlet pipe ejects all levels of low-pressure fluid at the outer side by means of axial high-speed flow, and the static swirl blades generate swirl to eject the low-pressure fluid from the center of the device.
The injection device is used for injecting gas and injecting liquid, and injecting gas and liquid.
The injection device can increase or decrease the number of stages during processing to meet the injection requirement.
The beneficial effects of the invention are as follows: the multifunctional static ejector performs pressure classification on low-pressure fluid with different pressure grades by increasing the number of low-pressure fluid strands, reduces energy loss at the inlet of the low-pressure fluid, improves the gathering and transportation efficiency of unconventional natural gas, and reduces gathering and transportation cost; the axial flow and the rotational flow realize axial and circumferential momentum exchange when the fluid is mixed, and compared with the single-direction momentum exchange of the traditional ejector, the fluid mixing effect is better; the shape of the static swirl blades enables the axial flowing fluid flowing through the static swirl blades to generate swirl, an auxiliary power supply device is not needed to be additionally arranged, and the self performance can be adjusted by changing different swirl blades; in order to meet the requirements of more working conditions, the ejector can be switched to traditional speed type ejection or rotational flow type ejection through adjustment of pipelines and components to complete ejection of single fluid.
Drawings
FIG. 1 is a block diagram of a multi-functional static injection device.
FIG. 2 is a schematic workflow diagram of a multi-functional static injection device injecting two low pressure fluids.
In the figure: 1. the high-pressure inlet section, the 2, the first-stage contraction section, the 3, the first-stage slant low-pressure air inlet pipe, the 4, the first-stage mixing section, the 5, the second-stage contraction section, the 6, the second-stage slant low-pressure air inlet pipe, the 7, the axial low-pressure air inlet pipe, the 8, the second-stage mixing section, the 9, the last-stage mixing section, the 10, the static swirl vane, the 11, the tail contraction section, the 12, the throat pipe, the 13, the diffusion section.
Detailed Description
The invention will be further described with reference to the drawings and detailed description.
FIG. 1 shows a block diagram of a multi-functional static injection device. In the figure, the multifunctional static injection device comprises a tail contraction section 11, a throat pipe 12, a diffusion section 13, a high-pressure inlet section 1, a first-stage contraction section 2, a first-stage mixing section 4, a second-stage contraction section 5 and a second-stage mixing section 8. The high-pressure inlet section 1, the first-stage contraction section and the mixing section (the first-stage contraction section 2 and the first-stage mixing section 4), the second-stage contraction section and the mixing section (the second-stage contraction section 5 and the second-stage mixing section 8), the tail contraction section 11, the throat pipe 12 and the diffusion section 13 are coaxially and sequentially connected in a sealing manner to form a main body of the injection device; a primary inclined low-pressure air inlet pipe 3 communicated with the main body is arranged outside the primary mixing section 4, a secondary inclined low-pressure air inlet pipe 6 communicated with the main body is arranged outside the secondary mixing section 8, and an axial low-pressure air inlet pipe 7 and a static swirl vane 10 are arranged in the main body; the inner diameters of the contraction sections (a first-stage contraction section 2, a second-stage contraction section 5 and a tail contraction section 11) are gradually reduced along the axial direction, the inclined low-pressure air inlet pipes (a first-stage inclined low-pressure air inlet pipe 3 and a second-stage inclined low-pressure air inlet pipe 6) of each stage are arranged at the outlet of the small inner diameter close to the corresponding contraction sections (the first-stage contraction section 2 and the second-stage contraction section 5), the static swirl blades 10 are arranged at the tail end of the final-stage mixing section 9, the outlet end of the axial low-pressure air inlet pipe 7 is arranged at the joint of the final-stage mixing section 9 and the tail contraction section 11, the inner diameter of the throat pipe 12 is larger than the inner diameter of the axial low-pressure air inlet pipe 7, and the inner diameter of the outlet of the diffusion section 13 is larger than the inner diameter of the inlet of the high-pressure inlet section 1. The inclined low-pressure air inlet pipes of each stage adopt an annular structure communicated with the inlet ends of the corresponding mixing sections (the first-stage mixing section 4 and the second-stage mixing section 8).
Fig. 2 shows a schematic workflow diagram illustrating a multifunctional static injection device with the injection of two low pressure fluids as an example. When the device works, high-pressure fluid enters the first-stage contraction section 2 through the high-pressure inlet section 1, the radius of the cross section of the first-stage contraction section 2 flowing through the device is gradually reduced, the flow speed of the fluid medium is increased along with the gradual reduction, the flow speed of the fluid medium is maximum when the fluid medium reaches the tail end, as known by Bernoulli equation, the larger the flow speed is, the smaller the air pressure is, namely the pressure at the tail end of the first-stage contraction section 2 is minimum, and the first low-pressure fluid is sucked into the device through the first-stage inclined low-pressure air inlet pipe 3 and is mixed and transported with the incoming flow in the first-stage mixing section 4. The mixed fluid flows through the static swirl blades 10 to form a swirl, the flow velocity at the center of the swirl is highest, and the pressure is lowest at the center of the swirl, as known from Bernoulli equation, and the second low-pressure fluid is also sucked into the device through the axial low-pressure air inlet pipe 7 to be mixed with the swirl, so that momentum exchange is completed, and the suction of two fluids by a single fluid is realized.
The inlet of the first-stage inclined low-pressure air inlet pipe 3 is closed and can be switched to a rotational flow injection mode, and high-pressure fluid flows through the first-stage contraction section 2 and the first-stage mixing section 4 through the high-pressure inlet section 1 and then passes through the static rotational flow blades 10 to form rotational flow. The flow velocity in the center of the rotational flow is high and the pressure is low, the low-pressure fluid is sucked into the device through the axial low-pressure air inlet pipe 7 and is mixed with the high-pressure fluid, and then the mixture is discharged through the tail contraction section 11, the throat pipe 12 and the diffusion section 13.
The inlet of the axial low-pressure air inlet pipe 7 is closed to be switched to a traditional speed type injection mode, at the moment, high-pressure fluid flows from the high-pressure inlet section 1 to the first-stage contraction section 2 to accelerate, the pressure of the high-pressure fluid is reduced, and the low-pressure air is sucked into equipment to be mixed through the first-stage inclined low-pressure air inlet pipe 3 at the outlet of the first-stage contraction section 2 and is discharged through the tail contraction section 11, the throat pipe 12 and the diffusion section 13.
Claims (5)
1. The utility model provides a multi-functional static injection device, it includes afterbody shrink section (11), throat pipe (12) and diffusion section (13), characterized by: the injection device further comprises a high-pressure inlet section (1), a first-stage contraction section (2), a first-stage mixing section (4), a second-stage contraction section (5) and a second-stage mixing section (8), wherein the high-pressure inlet section (1), the first-stage contraction section and the mixing section, the second-stage contraction section and the mixing section, a tail contraction section (11), a throat pipe (12) and a diffusion section (13) are coaxially and sequentially connected in a sealing manner to form a main body of the injection device; a primary inclined low-pressure air inlet pipe (3) communicated with the main body is arranged outside the primary mixing section (4), a secondary inclined low-pressure air inlet pipe (6) communicated with the main body is arranged outside the secondary mixing section (8), and an axial low-pressure air inlet pipe (7) and a static swirl vane (10) are arranged in the main body; the inner diameters of the contraction sections of each stage are gradually reduced along the axial direction, the inclined low-pressure air inlet pipes of each stage are arranged at small inner diameter outlets close to the contraction sections of the corresponding stages, the static cyclone blades (10) are arranged at the tail end of the final-stage mixing section (9), the outlet ends of the axial low-pressure air inlet pipes (7) are arranged at the connection positions of the final-stage mixing section (9) and the tail contraction section (11), the inner diameters of the throat pipes (12) are larger than the inner diameters of the axial low-pressure air inlet pipes (7), and the inner diameters of the outlets of the diffusion sections (13) are larger than the inner diameters of the inlets of the high-pressure inlet sections (1).
2. A multi-functional static ejection device according to claim 1, wherein: the inclined low-pressure air inlet pipes of all stages adopt annular structures communicated with the inlet ends of the corresponding mixing sections of all stages.
3. A multifunctional static ejection device according to claim 1 is characterized in that high-pressure fluid between the main body and the axial low-pressure air inlet pipe (7) ejects low-pressure fluid at each level at the outer side by means of axial high-speed flow, and static swirl vanes (10) generate swirl to eject low-pressure fluid from the center of the device.
4. The multifunctional static ejection device of claim 1, wherein the ejection device is used for ejecting gas, ejecting liquid and ejecting gas and liquid.
5. A multifunctional static ejection device according to claim 1, wherein the ejection device increases or decreases the number of stages during processing to meet the ejection requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810322024.7A CN108443239B (en) | 2018-04-11 | 2018-04-11 | Multifunctional static injection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810322024.7A CN108443239B (en) | 2018-04-11 | 2018-04-11 | Multifunctional static injection device |
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| CN108443239A CN108443239A (en) | 2018-08-24 |
| CN108443239B true CN108443239B (en) | 2023-10-31 |
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| CN201810322024.7A Active CN108443239B (en) | 2018-04-11 | 2018-04-11 | Multifunctional static injection device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108970430A (en) * | 2018-09-10 | 2018-12-11 | 广州赛宝计量检测中心服务有限公司 | Portable low humidity steam generating device |
| CN112627780B (en) * | 2019-09-24 | 2022-11-04 | 中国石油化工股份有限公司 | Ejector |
| CN113278749B (en) * | 2021-05-17 | 2022-06-17 | 中冶京诚工程技术有限公司 | Parallel pressure-equalizing diffused gas full-recovery method |
| CN113374743B (en) * | 2021-07-13 | 2023-10-03 | 中国铁建重工集团股份有限公司 | Vacuum generator |
| CN113550760B (en) * | 2021-07-26 | 2022-11-25 | 中国铁建重工集团股份有限公司 | Slag discharging device |
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| CN102500256A (en) * | 2011-11-11 | 2012-06-20 | 南通申东冶金机械有限公司 | Rotary jet mixer |
| CN102563945A (en) * | 2012-02-16 | 2012-07-11 | 西安交通大学 | Refrigeration circulating system with double-stage-injection ejector |
| CN104863904A (en) * | 2015-05-30 | 2015-08-26 | 大连理工大学 | Strong dynamic cyclone ejector |
| CN206386315U (en) * | 2016-11-29 | 2017-08-08 | 北京航天试验技术研究所 | A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber |
| CN208123131U (en) * | 2018-04-11 | 2018-11-20 | 大连理工大学 | A kind of multifunctional static induction apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050061378A1 (en) * | 2003-08-01 | 2005-03-24 | Foret Todd L. | Multi-stage eductor apparatus |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500256A (en) * | 2011-11-11 | 2012-06-20 | 南通申东冶金机械有限公司 | Rotary jet mixer |
| CN102563945A (en) * | 2012-02-16 | 2012-07-11 | 西安交通大学 | Refrigeration circulating system with double-stage-injection ejector |
| CN104863904A (en) * | 2015-05-30 | 2015-08-26 | 大连理工大学 | Strong dynamic cyclone ejector |
| CN206386315U (en) * | 2016-11-29 | 2017-08-08 | 北京航天试验技术研究所 | A kind of supersonic gas injector of the tangential tonifying Qi of mixing chamber |
| CN208123131U (en) * | 2018-04-11 | 2018-11-20 | 大连理工大学 | A kind of multifunctional static induction apparatus |
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