CN114682404A - External rotational flow cross hole ejector - Google Patents

External rotational flow cross hole ejector Download PDF

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Publication number
CN114682404A
CN114682404A CN202011638476.XA CN202011638476A CN114682404A CN 114682404 A CN114682404 A CN 114682404A CN 202011638476 A CN202011638476 A CN 202011638476A CN 114682404 A CN114682404 A CN 114682404A
Authority
CN
China
Prior art keywords
cavity
cross
fluid
channel
tapered
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011638476.XA
Other languages
Chinese (zh)
Inventor
隆武强
田华
崔靖晨
田江平
陈晓瑜
赵成微
于聪
张振先
礼博
董东升
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalian University of Technology
Original Assignee
Dalian University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dalian University of Technology filed Critical Dalian University of Technology
Priority to CN202011638476.XA priority Critical patent/CN114682404A/en
Publication of CN114682404A publication Critical patent/CN114682404A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02Spray pistols; Apparatus for discharge
    • B05B7/04Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02Spray pistols; Apparatus for discharge
    • B05B7/04Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2570/00Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/14Nitrogen oxides
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1453Sprayers or atomisers; Arrangement thereof in the exhaust apparatus

Abstract

The invention discloses an external rotational flow cross hole ejector, belonging to the technical field of ejectors, comprising: the body is provided with a first cavity, a third cavity and a second cavity, wherein the first cavity and the third cavity are arranged up and down, and the second cavity is arranged on the periphery of the first cavity and the third cavity; the first cavity and the third cavity are communicated through a first channel; an injection cylinder is arranged between the second cavity and the third cavity, and a plurality of second channels communicated with the second cavity and the third cavity are arranged on the injection cylinder. The ejector with the crossed holes can be used for enhancing the effect of crushing, atomizing and mixing the fluid; high-disturbance cross spray holes are adopted, so that disturbance can be effectively enhanced, and spray crushing and atomization are promoted; meanwhile, the second fluid with rotational flow is shot to the fluid first cavity at high speed, is mixed with the first fluid, enhances the mixing and assists the atomization of the first fluid; the sprayer provided by the invention can effectively improve the fluid mixing uniformity, the spray particle size is reduced by more than 25% under the same spray pressure, and the fluid evaporation, atomization and mixing efficiency is improved by more than 50%.

Description

External rotational flow cross hole ejector
Technical Field
The invention belongs to the technical field of ejectors, and particularly relates to an external swirl cross hole ejector.
Background
The ejector is applied to various spraying, atomizing, oil spraying, sand blasting, spraying and other equipment, plays an important role, and is a part which is very critical to influence the fluid atomization effect.
The use of injectors in the industry is very widespread:
for example, in the field of internal combustion engines, during the fuel atomization and injection process in the engine cylinder, the fuel atomization effect has a great influence on the fuel combustion effect, thereby directly influencing the pollutant discharge amount. As national emission regulations become more stringent, the requirements for fuel injectors become more stringent.
For example, in an engine aftertreatment system, in order to reduce the amount of NOx emissions, a reductant is injected into the exhaust gas, mixed with NOx and reacted in an SCR system to reduce the emissions. However, the atomization effect of the reducing agent is to be improved, and there is a problem of crystallization.
For example, the mixed gas of trichlorosilane and hydrogen in the field of polysilicon production enters a furnace chamber of a reduction furnace through a mixed gas nozzle, the reaction is completed at high temperature and high pressure, and the generated silicon is deposited on a silicon core rod.
But unqualified polysilicon can be generated in the process, and the phenomenon of silicon melting such as burning flow and the like can occur in serious cases, so that the appearance quality of the polysilicon is greatly reduced, and the processing and the sale of products are not facilitated.
Disclosure of Invention
In order to solve the technical problems, the invention adopts the following technical scheme:
an external swirl cross-hole injector comprising: the body is provided with a first cavity, a third cavity and a second cavity, wherein the first cavity and the third cavity are arranged up and down, and the second cavity is arranged on the periphery of the first cavity and the third cavity;
the first cavity and the third cavity are communicated through a first channel; an injection cylinder is arranged between the second cavity and the third cavity, and a plurality of second channels communicated with the second cavity and the third cavity are arranged on the injection cylinder.
Further, the first channel is at least 1 branch flow and confluence channel, wherein the branch flow part is arranged at one side close to the first cavity.
Further, the longitudinal section of the first channel is one of a tapered type, a divergent type, a tapered divergent type, or a tapered divergent type.
Further, the first channel is a single-hole channel, and the single-hole channel is a straight cylindrical round hole.
Further, the center line of the second channel is obliquely arranged with the radial section of the spray cylinder, and the included angle is more than or equal to 0 degrees and less than arcsin (R1/R2), wherein R1 is the inner diameter of the spray cylinder, and R2 is the outer diameter of the spray cylinder.
Further, the inclined included angles between the central lines of the second passages and the radial section of the injection cylinder are arranged in the same or different modes.
Further, an included angle between a center line of the second channel and an axis of the injection cylinder is β, where the included angle β between the center line of the second channel and the axis of the injection cylinder is a right angle or a non-right angle, and included angles β between the center lines of the plurality of second channels and the axis of the injection cylinder are the same or different.
Further, the longitudinal section of the second channel is one of a straight cylinder type, a tapered type, a divergent type, a tapered divergent type, or a tapered divergent type.
Further, the longitudinal section of the injection cylinder is in a splayed shape which expands outwards.
Has the beneficial effects that:
the invention provides an external swirl cross hole injector, firstly, the injector with cross holes can be used for enhancing the effect of crushing, atomizing and mixing fluid; secondly, high-disturbance cross spray holes are adopted, so that disturbance can be effectively enhanced, and spray crushing and atomization are promoted; meanwhile, the second fluid with rotational flow is shot to the fluid first cavity at high speed, is mixed with the first fluid, enhances the mixing and assists the atomization of the first fluid; thirdly, the ejector provided by the invention can effectively improve the fluid mixing uniformity, the spray particle size is reduced by more than 25% under the same spray pressure, and the fluid evaporation, atomization and mixing efficiency is improved by more than 50%.
Simultaneously, compare with prior art, can strengthen the inside turbulence disturbance of orifice of sprayer, obtain better mixing and injection characteristic, the air is at the supplementary spraying atomizing of the outside high-speed whirl of sprayer and mixes, can further promote the evaporation pyrolysis speed of spraying.
Drawings
FIG. 1 is a schematic view of a swirl cross hole injector structure outside a straight barrel type injection barrel;
FIG. 2 is a schematic structural view of an external swirl cross-hole injector of a splayed injection cylinder;
FIG. 3 is a schematic diagram of a splayed spray barrel external swirl cross-hole injector structure with beta < 90;
FIG. 4 is a schematic cross-sectional view of a second channel in the form of a straight tube;
FIG. 5 is a schematic cross-sectional view of a second channel in a tapered form;
FIG. 6 is a schematic cross-sectional view of a second channel of a divergent type;
FIG. 7 is a schematic cross-sectional view of a second channel of a tapered and diverging type;
FIG. 8 is a schematic cross-sectional view of a second channel of a tapered type;
FIG. 9 is a schematic cross-sectional view of a second passage hole of a straight tube type;
FIG. 10 is a schematic cross-sectional view of a second channel in the form of a straight tube;
FIG. 11 is a schematic cross-sectional view of a first channel being a straight cylinder;
FIG. 12 is a schematic cross-sectional view of the first channel being a straight tubular;
FIG. 13 is a schematic cross-sectional view of a first channel that is tapered;
FIG. 14 is a schematic cross-sectional view of a first channel that is divergent;
FIG. 15 is a schematic cross-sectional view of a first channel of the tapered and diverging type;
FIG. 16 is a schematic cross-sectional view of a first passage of a diverging and converging type;
wherein, 1, a first cavity; 2. a second lumen; 3. a first channel; 4. a second channel; 5. an ejection cartridge; 6. and a third cavity.
Detailed Description
Example 1
An external swirl cross-hole injector comprising: the device comprises a body, a first cavity body 1, a third cavity body 6 and a second cavity body 2, wherein the first cavity body 1 and the third cavity body 6 are arranged up and down, and the second cavity body 2 is arranged at the periphery of the first cavity body 1 and the third cavity body 6;
the first cavity 1 is communicated with the third cavity 6 through a first channel 3; an injection cylinder 5 is arranged between the second cavity 2 and the third cavity 6, and a plurality of second channels 4 for communicating the second cavity 2 with the third cavity 6 are arranged on the injection cylinder 5.
In the present embodiment, the first chamber 1, the second chamber 2, and the third chamber 6 are coaxially disposed.
Wherein the third cavity 6 is a mixing cavity.
The first channel 3 is at least 1 split-flow merging channel, wherein the split-flow part is arranged at one side close to the first cavity 1.
In this embodiment, the first channel 3 adopts a cross-jet structure, which enhances the turbulence of the mixed fluid and is beneficial to spray atomization.
Wherein, the longitudinal section shape of the first channel 3 is one of a tapered type, a gradually expanding type or a gradually expanding and gradually contracting type.
In other embodiments, the first channel 3 is a single-hole channel, and the single-hole channel is a straight cylindrical circular hole.
In the present embodiment, the center line of the second passage 4 is inclined at an angle of 0 ° or more a < arcsin (R1/R2) with respect to the radial cross-section of the cartridge 5, where R1 is the inner diameter of the cartridge 5 and R2 is the outer diameter of the cartridge 5.
Wherein the inclined angles between the center lines of the plurality of second passages 4 and the radial section of the injection cylinder 5 may be the same.
In other embodiments, the inclined angles between the centerlines of the plurality of second passages 4 and the radial section of the ejection cylinder 5 may be arranged differently.
In the present embodiment, an included angle β between the center line of the second channel 4 and the axis of the injection cylinder 5 is β, where the included angles β between the center lines of the plurality of second channels 4 and the axis of the injection cylinder 5 may all be right angles;
the included angles β between the center lines of the plurality of second passages 4 and the axis of the ejection cylinder 5 may be all non-right angles, or the included angles β between the center lines of some of the second passages 4 and the axis of the ejection cylinder 5 may be right angles, and the remaining included angles may be non-right angles.
The included angles beta between the central lines of the second passages 4 and the axis of the injection cylinder 5 can be the same or different.
In the present embodiment, the longitudinal sectional shape of the second passage 4 is one of a straight cylinder type, a tapered type, a divergent type, a tapered divergent type, or a tapered divergent type.
The longitudinal section of the injection cylinder 5 is cylindrical or splayed outwards.
The inclined angle between the central line of the second passages 4 and the radial section of the injection cylinder 5 and the inclined angle β between the central line of the second passages 4 and the axis of the injection cylinder 5 can be set in any combination.
In the working principle of the embodiment: the first fluid is sprayed into the third cavity 6 from the first cavity 1 through the first channel 3, the second fluid increases the rotational velocity from the second cavity 2 through the second channel 4, and the second fluid is sprayed into the third cavity 6 at a high speed to be mixed with the first fluid, so that the spraying effect of the first fluid is enhanced.
Example 2
In the embodiment, an external swirl cross-hole injector is adopted, in the case of mixing gas and liquid, in order to reduce the discharge amount of NOx in an engine aftertreatment system, a reducing agent is injected into tail gas, an air-assisted nozzle is applied, NH3 in urea is mixed with NOx and then reacts in an SCR system, the discharge is reduced, and the problem of crystallization of a urea solution is effectively relieved.
In this embodiment, the first chamber is used for inputting liquid, and the second chamber is used for inputting gas.
Example 3
In the embodiment, an external rotational flow cross hole ejector is adopted, and in the case of mixing two gases, the mixed gas of trichlorosilane and hydrogen in the field of polycrystalline silicon production enters a furnace chamber of a reduction furnace through a mixed gas nozzle, the reaction is completed at high temperature and high pressure, and the generated silicon is deposited on a silicon core rod.
In this embodiment, the first cavity is used for inputting trichlorosilane, and the second cavity is used for inputting hydrogen.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims (9)

1. An external swirl cross hole injector, comprising: the body is provided with a first cavity, a third cavity and a second cavity, wherein the first cavity and the third cavity are arranged up and down, and the second cavity is arranged on the periphery of the first cavity and the third cavity;
the first cavity and the third cavity are communicated through a first channel; an injection cylinder is arranged between the second cavity and the third cavity, and a plurality of second channels communicated with the second cavity and the third cavity are arranged on the injection cylinder.
2. The external swirl cross bore injector of claim 1 wherein the first passage is at least 1 split converging passage with a split portion disposed on a side adjacent the first cavity.
3. The external swirl cross-hole injector of claim 2 wherein the longitudinal cross-sectional shape of the first passage is one of tapered, diverging, tapered diverging, or tapered diverging.
4. The external swirl cross-hole injector of claim 1 wherein the first passage is a single-hole passage that is a straight cylindrical circular hole.
5. The external swirl cross-hole injector of claim 1 wherein the centerline of the second passage is inclined at an angle of 0 ° a < arcsin (R1/R2) to the radial cross-section of the cartridge, where R1 is the inner diameter of the cartridge and R2 is the outer diameter of the cartridge.
6. The external swirl cross-hole injector of claim 5 wherein the inclined angles between the centerlines of the plurality of second passages and the radial profile of the jet cartridge are arranged the same or different.
7. The external swirl cross-hole injector of claim 6 wherein the centerline of the second channel is at an angle β to the axis of the jet cylinder, wherein the centerline of the second channel is at a right or non-right angle to the axis of the jet cylinder, and wherein the centerlines of the second channels are at the same or different angles β to the axis of the jet cylinder.
8. The external swirl cross-hole injector of claim 7 wherein the longitudinal cross-sectional shape of the second passage is one of a straight barrel, tapered, diverging, tapered diverging, or tapered diverging.
9. The external swirl cross-hole injector of claim 5 wherein the longitudinal cross-sectional shape of the cartridge is in the form of an outwardly flared "splay".
CN202011638476.XA 2020-12-31 2020-12-31 External rotational flow cross hole ejector Pending CN114682404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011638476.XA CN114682404A (en) 2020-12-31 2020-12-31 External rotational flow cross hole ejector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011638476.XA CN114682404A (en) 2020-12-31 2020-12-31 External rotational flow cross hole ejector

Publications (1)

Publication Number Publication Date
CN114682404A true CN114682404A (en) 2022-07-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115254496A (en) * 2022-08-10 2022-11-01 黄河交通学院 Automatic spraying device is used in robot production and processing
CN115254496B (en) * 2022-08-10 2024-04-26 黄河交通学院 Automatic spraying device for robot production and processing

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0205739A1 (en) * 1985-04-25 1986-12-30 Deutsche Babcock Werke Aktiengesellschaft Device and process for the supply of sludge
JPH0641856U (en) * 1992-11-17 1994-06-03 株式会社イナックス Combustion equipment using a spray nozzle
JP2002159889A (en) * 2000-11-24 2002-06-04 Ikeuchi:Kk Two-fluid nozzle
CN101287555A (en) * 2005-10-07 2008-10-15 迪特尔·沃尔兹 Atomizing nozzle for two substances
US20100163647A1 (en) * 2006-02-24 2010-07-01 Dieter Wurz Two-Component Nozzle With Secondary Air Nozzles Arranged in Circular Form
CN201529588U (en) * 2009-06-11 2010-07-21 中国石油化工集团公司 Atomizing cool-down nozzle
CN201807473U (en) * 2010-07-09 2011-04-27 中冶京诚工程技术有限公司 Novel aerosol nozzle without air resistance
CN104384037A (en) * 2014-10-28 2015-03-04 亿川科技(成都)有限责任公司 Two-fluid atomization nozzle
CN110170393A (en) * 2019-06-28 2019-08-27 无锡职业技术学院 A kind of high-low pressure mixed aerosol nozzle
CN110805512A (en) * 2018-08-05 2020-02-18 大连理工大学 Nozzle with torsional composite hole
CN111207414A (en) * 2020-01-17 2020-05-29 西北工业大学 Strong rotational flow centrifugal reflux type nozzle

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0205739A1 (en) * 1985-04-25 1986-12-30 Deutsche Babcock Werke Aktiengesellschaft Device and process for the supply of sludge
JPH0641856U (en) * 1992-11-17 1994-06-03 株式会社イナックス Combustion equipment using a spray nozzle
JP2002159889A (en) * 2000-11-24 2002-06-04 Ikeuchi:Kk Two-fluid nozzle
CN101287555A (en) * 2005-10-07 2008-10-15 迪特尔·沃尔兹 Atomizing nozzle for two substances
US20100163647A1 (en) * 2006-02-24 2010-07-01 Dieter Wurz Two-Component Nozzle With Secondary Air Nozzles Arranged in Circular Form
CN201529588U (en) * 2009-06-11 2010-07-21 中国石油化工集团公司 Atomizing cool-down nozzle
CN201807473U (en) * 2010-07-09 2011-04-27 中冶京诚工程技术有限公司 Novel aerosol nozzle without air resistance
CN104384037A (en) * 2014-10-28 2015-03-04 亿川科技(成都)有限责任公司 Two-fluid atomization nozzle
CN110805512A (en) * 2018-08-05 2020-02-18 大连理工大学 Nozzle with torsional composite hole
CN110170393A (en) * 2019-06-28 2019-08-27 无锡职业技术学院 A kind of high-low pressure mixed aerosol nozzle
CN111207414A (en) * 2020-01-17 2020-05-29 西北工业大学 Strong rotational flow centrifugal reflux type nozzle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115254496A (en) * 2022-08-10 2022-11-01 黄河交通学院 Automatic spraying device is used in robot production and processing
CN115254496B (en) * 2022-08-10 2024-04-26 黄河交通学院 Automatic spraying device for robot production and processing

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Application publication date: 20220701

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