CN113102132A - Strong corrosive liquid ejector - Google Patents

Strong corrosive liquid ejector Download PDF

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Publication number
CN113102132A
CN113102132A CN202110405366.7A CN202110405366A CN113102132A CN 113102132 A CN113102132 A CN 113102132A CN 202110405366 A CN202110405366 A CN 202110405366A CN 113102132 A CN113102132 A CN 113102132A
Authority
CN
China
Prior art keywords
throat pipe
flange
pipe
end flange
nozzle
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
CN202110405366.7A
Other languages
Chinese (zh)
Inventor
彭宏亮
彭毅
申彪
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.)
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Original Assignee
Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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 Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd filed Critical Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
Priority to CN202110405366.7A priority Critical patent/CN113102132A/en
Publication of CN113102132A publication Critical patent/CN113102132A/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
    • B05B7/24Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/262Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L49/00Connecting arrangements, e.g. joints, specially adapted for pipes of brittle material, e.g. glass, earthenware
    • F16L49/04Flanged joints
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04Coatings characterised by the materials used
    • F16L58/14Coatings characterised by the materials used by ceramic or vitreous materials

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The invention discloses a strong corrosive liquid ejector, which comprises a nozzle, a throat pipe, a front end flange, a rear end flange, a suction pipe and a boss, wherein the front end of the throat pipe is provided with a front annular table, the front end flange is clamped on the front annular table, the rear end of the throat pipe is provided with a rear annular table, the rear end flange is clamped on the rear annular table, the boss is arranged in the middle of the throat pipe, the boss is provided with a through hole communicated with the interior of the throat pipe, the suction pipe is inserted in the through hole, the throat pipe, the nozzle and the suction pipe are quartz pipes, titanium tetrachloride is injected into the throat pipe from an inlet of the flange at a high speed to form inner jet flow, the dynamic pressure of high-speed liquid is reduced, the interior of the throat pipe is vacuumized, water is sucked into the throat pipe through the suction pipe, the titanium tetrachloride and the water are hydrolyzed in the throat pipe and are injected to the exterior through an outlet of the throat pipe flange, and the nozzle, the throat pipe and the suction, and the internal reaction conditions are transparent.

Description

Strong corrosive liquid ejector
Technical Field
The invention relates to the technical field of chemical equipment, in particular to a strong-corrosion liquid ejector.
Background
The sprayer structural style is more in the existing market, and the main part material has: common carbon steel, stainless steel, engineering plastics and the like. The working condition of the TiCl4 injector used in the titanium sponge factory is in a strong acid corrosion environment, common carbon steel cannot be used, TiCl4 is mixed with water for reaction, and generated chloride ions are not suitable for stainless steel. Therefore, the general strong-corrosion liquid ejector is generally made of engineering plastics such as polytetrafluoroethylene or PVDF through welding, but has the following problems that the welding seam of the outer cylinder is broken: mainly occurs at the welding position of the throat pipe structure, and the outer cylinder is replaced once in about 24 hours at worst; and (3) bursting of a nozzle outlet: when the spray nozzle is welded at the outlet of the spray nozzle, after the outlet of the spray nozzle bursts, a vacuum area of the sprayer cannot be formed, water cannot be sucked normally, TiCl4 is caused to flow back from the water inlet, and the spray nozzle is replaced once in about 4 hours at worst; the blockage of the outer cylinder contraction section of the ejector mainly occurs at the welding part of the throat pipe structure, and the initial judgment is that the spray nozzle outlet bursts; the technical defects influence the working efficiency of the ejector and bring inconvenience to daily production of a factory.
Therefore, how to improve the service life of the ejector and improve the continuous operation efficiency of the ejector is a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a strong-corrosion liquid ejector, which is designed into an integral structure, and a nozzle, a throat pipe and a suction pipe are made of quartz glass materials, so that the ejector not only resists strong acid and alkali corrosion and erosion and abrasion, but also can bear the high temperature of 200 ℃ generated by hydrolysis reaction, and the internal reaction condition is transparent.
In order to solve the technical problem, the invention provides a strong-corrosion liquid ejector which comprises a nozzle, a throat pipe, a front end flange, a rear end flange, a suction pipe and a boss, wherein the front end of the throat pipe is provided with a front annular table, the front end flange is clamped on the front annular table, the rear end of the throat pipe is provided with a rear annular table, the rear end flange is clamped on the rear annular table, the boss is arranged in the middle of the throat pipe, the boss is provided with a through hole communicated with the interior of the throat pipe, the suction pipe is inserted into the through hole, and the throat pipe, the nozzle and the suction pipe are quartz pipes.
Preferably, the nozzle further comprises a flange plate connected with the rear end flange and used for fixing the nozzle.
Preferably, the flange plate and the rear end flange are detachably connected through a first fastener.
Preferably, first sealing gaskets are arranged between the flange plate and the nozzle and between the rear annular table and the nozzle.
Preferably, the suction pipe further comprises a clamping plate connected with the boss and used for fixing the suction pipe.
Preferably, the clamping plate is mounted on the boss by a second fastener.
Preferably, a second sealing gasket is arranged between the suction pipe and the boss.
Preferably, the front end flange and the rear end flange are both half-section flanges.
Preferably, an elastic gasket is arranged between the front end flange and the outlet flange.
Preferably, the outer periphery of the throat pipe is wound with a cloth strip.
The invention provides a strong-corrosion liquid ejector which comprises a nozzle, a throat pipe, a front end flange, a rear end flange, a suction pipe and a boss, wherein the front end of the throat pipe is provided with a front annular table, the front end flange is clamped on the front annular table, the rear end of the throat pipe is provided with a rear annular table, the rear end flange is clamped on the rear annular table, the boss is arranged in the middle of the throat pipe, the boss is provided with a through hole communicated with the interior of the throat pipe, and the suction pipe is inserted into the through hole. The application discloses strong corrosion liquid ejector, titanium tetrachloride gets into the nozzle and jets into the choke at a high speed from the flange entry and forms interior efflux, because high-speed liquid dynamic pressure reduces, the inside vacuum that forms of choke, inhale the choke with outside reactant water through the suction tube, titanium tetrachloride and reactant water hydrolyze in the choke, then, spout outside passageway through the choke flange export, accomplish titanium tetrachloride hydrolysis operation, because the choke of strong corrosion liquid ejector is overall structure, and through the mode and flange entry and the flange exit linkage of preceding ring platform of front end flange joint, rear end flange joint back ring platform, satisfy titanium tetrachloride's injection pressure intensity demand, avoid appearing the circumstances such as the outer barrel welding seam breaks, the shower nozzle export bursts and the shrink section of ejector urceolus blocks up, improve ejector life, improve ejector continuous operation efficiency. Meanwhile, the nozzle, the throat pipe and the suction pipe are made of quartz glass materials, so that the nozzle, the throat pipe and the suction pipe are resistant to strong acid and alkali corrosion and erosion and abrasion, can bear the high temperature of 200 ℃ generated by hydrolysis reaction, and can see the internal reaction condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
fig. 2 is a cross-sectional view of the structure shown in fig. 1.
Wherein, in fig. 1-2:
the sealing structure comprises a throat pipe-1, a front end flange-2, a rear end flange-3, a suction pipe-4, a boss-5, a front annular table-6, a rear annular table-7, a nozzle-8, a flange-9, a first fastening piece-10, a first sealing gasket-11, a clamping plate-12, a second fastening piece-13, a second sealing gasket-14, an outlet flange-15 and an elastic gasket-16.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, fig. 1 is a schematic overall structure diagram of an embodiment of the present invention; fig. 2 is a cross-sectional view of the structure shown in fig. 1.
In a specific embodiment provided by the invention, the throat-shaped air conditioner mainly comprises a throat pipe 1, a front end flange 2, a rear end flange 3, a suction pipe 4, a boss 5 and a nozzle 8, wherein the front end of the throat pipe 1 is provided with a front annular table 6, the front end flange 2 is clamped on the front annular table 6, the rear end of the throat pipe 1 is provided with a rear annular table 7, the rear end flange 3 is clamped on the rear annular table 7, the boss 5 is arranged in the middle of the throat pipe 1, the boss 5 is provided with a through hole communicated with the interior of the throat pipe 1, and the suction pipe 4 is inserted into the through hole.
The throat pipe 1 is used for a liquid injection pipeline, the front end flange 2 and the front annular table 6 are in matched clamping connection and used for connecting a liquid outlet of the throat pipe 1 with the outside, the rear end flange 3 and the rear annular table 7 are in matched clamping connection and used for connecting the nozzle 8 with the throat pipe 1, and the suction pipe 4 and the boss 5 are in matched connection and used for sucking water into the throat pipe 1 when negative pressure is generated by liquid injection.
Specifically, in the practical application process, titanium tetrachloride enters a nozzle 8 from a flange inlet at the joint of a rear end flange 3 and a rear annular platform 7 and is injected into a throat pipe 1 at a high speed to form an inner jet flow, vacuum is formed inside the throat pipe 1 due to the reduction of high-speed liquid dynamic pressure, external reactant water is sucked into the throat pipe 1 through a suction pipe 4, the titanium tetrachloride and the reactant water are hydrolyzed in the throat pipe 1 and then are injected into an external channel through a flange outlet of the throat pipe 1 to complete the hydrolysis operation of the titanium tetrachloride, the throat pipe 1 of the strong corrosion liquid ejector is of an integral structure and is connected with the flange inlet and the flange outlet in a manner that a front end flange 2 is clamped with a front annular platform 6 and the rear end flange 3 is clamped with the rear annular platform 7, the injection pressure strength requirement of the titanium tetrachloride is met, the situations of outer barrel weld joint breakage, nozzle outlet burst, outer barrel contraction section blockage and the like, the service life of the ejector is prolonged, and the continuous operation efficiency of the ejector is improved.
In order to facilitate the installation and connection of the nozzle 8, the strong corrosive liquid ejector further comprises a flange plate 9 which is connected with the rear end flange 3 and used for fixing the nozzle 8, the flange plate 9 and the rear end flange 3 are detachably connected through a first fastening piece 10, the flange plate 9 of the nozzle 8 and the rear end flange 3 are fixedly connected through the first fastening piece 10, and the function of connecting the nozzle 8 and the throat pipe 1 is achieved.
Furthermore, first sealing gaskets 11 are arranged between the flange 9 and the nozzle 8 and between the rear annular table 7 and the nozzle 8, and the first sealing gaskets 11 are used for sealing gaps between the flange 9 and the nozzle 8 and between the rear annular table 7 and the nozzle 8, so that the titanium tetrachloride is ensured to be isolated from the outside when the nozzle 8 sprays the titanium tetrachloride, the vacuum effect in the throat pipe 1 is ensured, and the suction pipe 4 is enabled to normally suck the reactants.
The strong corrosive liquid ejector further comprises a clamping plate 12 which is connected with the boss 5 and used for fixing the suction pipe 4, the clamping plate 12 is installed on the boss 5 through a second fastener 13, and the clamping plate 12 is respectively placed on the suction pipe 4 and below the boss 5 and used for fixing the suction pipe 4 at the inlet of a reactant channel of the throat pipe 1 through the second fastener 13; and a second sealing gasket 14 is arranged between the suction pipe 4 and the boss 5, and the second sealing gasket 14 is also used for sealing, which is not described in detail herein.
Further, front end flange 2 and rear end flange 3 are the half-section flange, and the half-section flange is the part structure, and is simpler when installation and dismantlement, and does benefit to the maintenance and changes.
It should be noted that an elastic gasket 16 is arranged between the front end flange 2 and the outlet flange 15, and the elastic gasket 16 is also used for sealing a gap between the front end flange 2 and the outlet flange 15, so as to protect the front end flange 2 and the outlet flange 15 while ensuring vacuum formation in the throat pipe 1, and increase the service life of the front end flange 2 and the outlet flange 15.
In order to prevent the quartz glass from cracking due to excessive internal stress, cloth strips are wound on the periphery of the throat pipe 1 and pre-pressure is applied; meanwhile, as the quartz glass is fragile, in order to prevent collision and damage in transportation, a layer of thicker foam plastic is coated outside the quartz glass, so that the transportation safety of the quartz glass is ensured.
To sum up, the strong corrosive liquid ejector that this embodiment provided mainly includes choke, front end flange, rear end flange, suction pipe and boss, and the choke front end is equipped with preceding annular platform, and front end flange joint is on preceding annular platform, and the choke rear end is equipped with back annular platform, and rear end flange joint is on back annular platform, and the boss sets up in the choke middle part, is equipped with the through-hole with the inside intercommunication of choke on the boss, and the suction pipe pegs graft in the through-hole. The application discloses strong corrosion liquid ejector, titanium tetrachloride gets into the nozzle and jets into the choke at a high speed from the flange entry and forms interior efflux, because high-speed liquid dynamic pressure reduces, the inside vacuum that forms of choke, inhale the choke with outside reactant water through the suction tube, titanium tetrachloride and reactant water hydrolyze in the choke, then, spout outside passageway through the choke flange export, accomplish titanium tetrachloride hydrolysis operation, because the choke of strong corrosion liquid ejector is overall structure, and through the mode and flange entry and the flange exit linkage of preceding ring platform of front end flange joint, rear end flange joint back ring platform, satisfy titanium tetrachloride's injection pressure intensity demand, avoid appearing the circumstances such as the outer barrel welding seam breaks, the shower nozzle export bursts and the shrink section of ejector urceolus blocks up, improve ejector life, improve ejector continuous operation efficiency. Meanwhile, the nozzle, the throat pipe and the suction pipe are made of quartz glass materials, so that the nozzle, the throat pipe and the suction pipe are resistant to strong acid and alkali corrosion and erosion and abrasion, can bear the high temperature of 200 ℃ generated by hydrolysis reaction, and can see the internal reaction condition.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The jet device is characterized by comprising a nozzle, a throat pipe, a front end flange, a rear end flange, a suction pipe and a boss, wherein the front end of the throat pipe is provided with a front annular table, the front end flange is clamped on the front annular table, the rear end of the throat pipe is provided with a rear annular table, the rear end flange is clamped on the rear annular table, the boss is arranged in the middle of the throat pipe, the boss is provided with a through hole communicated with the interior of the throat pipe, the suction pipe is inserted into the through hole, and the throat pipe, the nozzle and the suction pipe are quartz pipes.
2. The high-corrosion liquid ejector according to claim 1, further comprising a flange plate connected to the rear end flange and configured to hold a nozzle.
3. The high-corrosion liquid ejector according to claim 2, wherein the flange plate is detachably connected to the rear end flange by a first fastening member.
4. The high-corrosion liquid ejector according to claim 3, wherein a first sealing gasket is arranged between the flange plate and the nozzle and between the rear annular table and the nozzle.
5. The high-corrosion liquid ejector according to claim 1, further comprising a clamping plate connected to the boss and configured to fix the suction pipe.
6. The high-corrosion liquid ejector according to claim 5, wherein the clamp plate is mounted on the boss by a second fastener.
7. The high-corrosion liquid ejector according to claim 6, wherein a second sealing gasket is arranged between the suction pipe and the boss.
8. The high-corrosion liquid ejector according to any one of claims 1 to 7, wherein both the front end flange and the rear end flange are half-section flanges.
9. The high-corrosion liquid ejector according to claim 8, wherein an elastic gasket is arranged between the front end flange and the outlet flange.
10. The high-corrosion liquid ejector according to claim 8, wherein the throat is wrapped with a cloth strip.
CN202110405366.7A 2021-04-15 2021-04-15 Strong corrosive liquid ejector Pending CN113102132A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110405366.7A CN113102132A (en) 2021-04-15 2021-04-15 Strong corrosive liquid ejector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110405366.7A CN113102132A (en) 2021-04-15 2021-04-15 Strong corrosive liquid ejector

Publications (1)

Publication Number Publication Date
CN113102132A true CN113102132A (en) 2021-07-13

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CN202110405366.7A Pending CN113102132A (en) 2021-04-15 2021-04-15 Strong corrosive liquid ejector

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29612769U1 (en) * 1996-07-26 1996-11-07 Dmt Gmbh Device for wetting fine-grained material
JP2001334181A (en) * 2000-05-30 2001-12-04 Dainippon Screen Mfg Co Ltd Cleaning nozzle and substrate cleaning device
CN2595137Y (en) * 2003-02-21 2003-12-31 天津市水利科学研究所 Wenturi fertilizer injector with one-way valve
CN2905201Y (en) * 2006-05-23 2007-05-30 兰州理工大学 A jet mixing device
CN201074612Y (en) * 2007-07-10 2008-06-18 中电投远达环保工程有限公司 Vortex flow type efflux pump
CN102301174A (en) * 2009-01-28 2011-12-28 斯科特·多伊格 Wear resistant slurry pipe fitting
CA2710363A1 (en) * 2010-07-28 2012-01-28 Randel Brandstrom Cladding the interior of a straight pipe section
FR2968580A1 (en) * 2010-12-14 2012-06-15 Robinetterie Mingori Mixing device for shower installation used in e.g. hotels, has outlet opening connected to conduit of water supply of shower head, and holes arranged along longitudinal axis between inlet opening and outlet opening
CN203668015U (en) * 2013-12-06 2014-06-25 攀枝花钢企欣宇化工有限公司 Crude titanium tetrachloride hydrolysis watering device
CN207122612U (en) * 2017-12-15 2018-03-20 山东成森科技有限公司 Jet accelerates water admixing device
CN207822823U (en) * 2017-12-05 2018-09-07 宁夏金梯氟塑防腐设备有限公司 Injector mixing chamber

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29612769U1 (en) * 1996-07-26 1996-11-07 Dmt Gmbh Device for wetting fine-grained material
JP2001334181A (en) * 2000-05-30 2001-12-04 Dainippon Screen Mfg Co Ltd Cleaning nozzle and substrate cleaning device
CN2595137Y (en) * 2003-02-21 2003-12-31 天津市水利科学研究所 Wenturi fertilizer injector with one-way valve
CN2905201Y (en) * 2006-05-23 2007-05-30 兰州理工大学 A jet mixing device
CN201074612Y (en) * 2007-07-10 2008-06-18 中电投远达环保工程有限公司 Vortex flow type efflux pump
CN102301174A (en) * 2009-01-28 2011-12-28 斯科特·多伊格 Wear resistant slurry pipe fitting
CA2710363A1 (en) * 2010-07-28 2012-01-28 Randel Brandstrom Cladding the interior of a straight pipe section
FR2968580A1 (en) * 2010-12-14 2012-06-15 Robinetterie Mingori Mixing device for shower installation used in e.g. hotels, has outlet opening connected to conduit of water supply of shower head, and holes arranged along longitudinal axis between inlet opening and outlet opening
CN203668015U (en) * 2013-12-06 2014-06-25 攀枝花钢企欣宇化工有限公司 Crude titanium tetrachloride hydrolysis watering device
CN207822823U (en) * 2017-12-05 2018-09-07 宁夏金梯氟塑防腐设备有限公司 Injector mixing chamber
CN207122612U (en) * 2017-12-15 2018-03-20 山东成森科技有限公司 Jet accelerates water admixing device

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王学生等主编: "《压力容器》", 31 May 2018, 华东理工大学出版社 *
许晓风主编: "《大学实验室基础训练教程:化学与生物专业》", 30 June 2018, 东南大学出版社 *

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Application publication date: 20210713