CN112452072A - Liquid oxygen preparation system - Google Patents

Liquid oxygen preparation system Download PDF

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Publication number
CN112452072A
CN112452072A CN202011225856.0A CN202011225856A CN112452072A CN 112452072 A CN112452072 A CN 112452072A CN 202011225856 A CN202011225856 A CN 202011225856A CN 112452072 A CN112452072 A CN 112452072A
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CN
China
Prior art keywords
liquid oxygen
conical gear
filter screen
bevel gear
wall
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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
CN202011225856.0A
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Chinese (zh)
Inventor
唐正平
李万学
徐仁龙
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.)
Changde Tiansheng Electrification Co ltd
Original Assignee
Changde Tiansheng Electrification 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 Changde Tiansheng Electrification Co ltd filed Critical Changde Tiansheng Electrification Co ltd
Priority to CN202011225856.0A priority Critical patent/CN112452072A/en
Publication of CN112452072A publication Critical patent/CN112452072A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411Filter cartridges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66Regeneration of the filtering material or filter elements inside the filter
    • B01D46/68Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
    • B01D46/681Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Materials (AREA)

Abstract

The invention discloses a liquid oxygen preparation system which comprises a filtering mechanism, wherein a decontamination mechanism is arranged below the filtering mechanism, a fixed frame is arranged on one side of the decontamination mechanism, a connecting pipe is arranged inside the fixed frame, a liquid oxygen storage tank main body is connected above the connecting pipe, an oxygen recovery pipe is connected to the top of the liquid oxygen storage tank main body, a connecting heat exchanger is connected to one side of the oxygen recovery pipe, a liquid nitrogen output pipe is connected to one side of the connecting heat exchanger, and the tail end of the bottom of the liquid nitrogen output pipe is connected with the liquid nitrogen storage tank main body. The inner tube that this liquid oxygen preparation system set up can be effectual provides the support for the filter screen reel, maintains the appearance of filter screen reel to and the filter screen reel can be effectual for gaseous filtration processing that provides, the impurity that can effectual reduction gas carried, and the inner tube can be effectual provides the reposition of redundant personnel passageway for gaseous through the filtration pore, can effectually handle gaseous dispersion.

Description

Liquid oxygen preparation system
Technical Field
The invention relates to the technical field of liquid oxygen preparation, in particular to a liquid oxygen preparation system.
Background
Liquid oxygen has a wide range of industrial and medical uses. The industrial process for producing liquid oxygen consists in fractionating liquid air. The total expansion ratio of liquid oxygen is as high as 860:1, because of the advantage that the liquid oxygen is widely applied to industrial production and military aspects in modern times. Due to its low temperature characteristics, liquid oxygen can make the materials it contacts very brittle. Liquid oxygen is also a very strong oxidant, organic matter burns violently in liquid oxygen. Some materials, including bitumen, may explode if immersed in liquid oxygen for extended periods of time. In the aerospace industry, liquid oxygen is an important oxidant, usually used in combination with liquid hydrogen or kerosene (both as reducing agents). Some of the earliest ballistic missiles used liquid oxygen as the oxidant, such as V2 (liquid oxygen-alcohol) and R-7 (liquid oxygen-kerosene). When used as a propellant, liquid oxygen can provide high specific impulse for an engine.
The existing liquid oxygen preparation system is easy to adsorb impurities carried by gas in the system, influences gas supply and reduces the preparation effect of the system easily, and can not well meet the use requirements of people.
Disclosure of Invention
The invention aims to provide a liquid oxygen preparation system, which aims to solve the problems that impurities carried by gas are easy to adsorb in the system and influence the gas supply of the gas, the preparation effect of the system is easy to reduce, and the use requirements of people cannot be well met in the use process of the conventional liquid oxygen preparation system in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a liquid oxygen preparation system, includes filtering mechanism, scrubbing mechanism is installed to filtering mechanism's below, and one side of scrubbing mechanism installs fixed frame, fixed frame's inside is provided with the connecting pipe, and the top of connecting pipe is connected with liquid oxygen storage tank main part, the top of liquid oxygen storage tank main part is connected with the oxygen recovery pipe, and one side of oxygen recovery pipe is connected with the connection heat exchanger, one side of connecting the heat exchanger is connected with the liquid nitrogen output tube, and the end-to-end connection of liquid nitrogen output tube bottom has liquid nitrogen storage tank main part.
Preferably, filtering mechanism includes step motor, intake pipe, canister casing, inner tube, filtration pore, filter screen reel, partition plate, lead screw socle and central lead screw, the intake pipe is installed to step motor's front end, the canister casing is installed to step motor's below, and the inside of canister casing is provided with the inner tube, the filtration pore has been seted up to the inner wall of inner tube, the inside of inner tube is provided with the filter screen reel, and the inside of filter screen reel is provided with the partition plate, the inside through connection of partition plate has the lead screw socle, and the inside through connection of lead screw socle has central lead screw.
Preferably, coincide between the axis of straining jar casing and inner tube mutually, and the inner wall evenly distributed of filtration pore edge inner tube to be fixed connection between inner tube and the filter screen reel.
Preferably, the width of the outer wall of the partition frame plate is equal to the width of the inner wall of the filter screen drum, the partition frame plate is fixedly connected with the screw rod sleeve column, and the central screw rod is connected with the screw rod sleeve column through a thread pair.
Preferably, the dirt removing mechanism comprises a dirt groove chamber, a dirt discharge port, a shifting sheet, a through hole, a connecting shaft rod, a positioning conical gear, a first transverse conical gear, a connecting cross rod, a fixed sleeve plate, a second transverse conical gear, an adjusting conical gear and a servo motor, the bottom of the outer wall of the sewage tank chamber is provided with a sewage discharge outlet, the inside of the sewage tank chamber is provided with a shifting sheet, the left side and the right side of the inner wall of the shifting piece are both provided with through holes, the middle part inside the shifting piece is connected with a connecting shaft lever in a penetrating way, and the tail end of the bottom of the connecting shaft lever is connected with a positioning conical gear, one side of the positioning conical gear is provided with a first transverse conical gear, the input end of the first transverse conical gear is connected with a connecting cross rod, the input end of the connecting cross rod is connected with a second transverse conical gear, and an adjusting bevel gear is arranged above the second transverse bevel gear, and the input end of the adjusting bevel gear is connected with a servo motor.
Preferably, the through holes are uniformly distributed along the vertical central line direction of the shifting sheet, and the width of the outer wall of the shifting sheet is equal to that of the inner wall of the sewage tank chamber.
Preferably, the plectrum is fixed connection through connecting between axostylus axostyle and the location conical gear, and location conical gear meshes with first horizontal conical gear mutually, first horizontal conical gear is connected with second horizontal conical gear through connecting the horizontal pole, and connects the horizontal pole and run through in the bottom of fixed lagging, and second horizontal conical gear meshes with adjusting conical gear mutually.
Compared with the prior art, the invention has the following beneficial effects:
the filter mechanism is arranged, the stepping motor can effectively push the screw rod sleeve column to move along the vertical central line direction of the inner cylinder through the central screw rod, the screw rod sleeve column is connected with the partition frame plate, the partition frame plate and the screw rod sleeve column can synchronously move, and the position of the partition frame plate can be effectively changed, so that dust adsorbed on the inner wall of the filter screen drum at different heights can be effectively scraped, the dust can be effectively removed, and the filter screen drum can provide stable filtering treatment for gas; the inner tube can effectually support for the filter screen reel provides, maintains the appearance of filter screen reel to and the filter screen reel can effectually provide filtration treatment for gas, can the gaseous impurity that carries of effectual reduction, and the inner tube can effectually provide the reposition of redundant personnel passageway for gas through the filtration pore, can effectually handle gaseous dispersion.
The sewage treatment device is provided with the sewage removal mechanism, the servo motor can effectively push the second transverse conical gear to rotate by adjusting the conical gear, the second transverse conical gear is connected with the first transverse conical gear by the connecting cross rod, the second transverse conical gear and the first transverse conical gear can synchronously rotate, and the first transverse conical gear is meshed with the positioning conical gear, so that the positioning conical gear can effectively drive the shifting sheet to rotate by the connecting shaft rod, and the impurities in the sewage tank chamber can be conveniently treated; the plectrum can effectually scrape out the adsorbed impurity of dirty inslot indoor wall to and can effectually promote impurity rotation, can pass through the drain with impurity and derive, and the resistance that the through-hole can effectually alleviate the plectrum and receive.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic structural view of an inner barrel according to the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 1 at B according to the present invention;
fig. 5 is a schematic top view of the spacer plate according to the present invention.
In the figure: 1. a filtering mechanism; 101. a stepping motor; 102. an air inlet pipe; 103. a canister housing; 104. an inner barrel; 105. filtering holes; 106. a screen drum; 107. a spacer plate; 108. a screw rod sleeve column; 109. a central screw rod; 2. a decontamination mechanism; 201. a sewage tank chamber; 202. a sewage draining outlet; 203. a shifting sheet; 204. a through hole; 205. connecting the shaft lever; 206. positioning the bevel gear; 207. a first transverse bevel gear; 208. connecting the cross bars; 209. fixing the sleeve plate; 210. a second transverse bevel gear; 211. adjusting the bevel gear; 212. a servo motor; 3. a fixed frame; 4. a connecting pipe; 5. a liquid oxygen storage tank main body; 6. a liquid nitrogen storage tank main body; 7. an oxygen recovery tube; 8. connecting a heat exchanger; 9. and a liquid nitrogen output pipe.
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. 1-5, the present invention provides a technical solution: the utility model provides a liquid oxygen preparation system, including filtering mechanism 1, scrubbing mechanism 2 is installed to filtering mechanism 1's below, and scrubbing mechanism 2's one side installs fixed frame 3, fixed frame 3's inside is provided with connecting pipe 4, and the top of connecting pipe 4 is connected with liquid oxygen storage tank main part 5, liquid oxygen storage tank main part 5's top is connected with oxygen recovery tube 7, and one side of oxygen recovery tube 7 is connected with connection heat exchanger 8, one side of connecting heat exchanger 8 is connected with liquid nitrogen output tube 9, and the end-to-end connection of liquid nitrogen output tube 9 bottom has liquid nitrogen storage tank main part 6.
In the invention: filtering mechanism 1 includes step motor 101, intake pipe 102, canister casing 103, inner tube 104, filtration pore 105, filter screen reel 106, partition plate 107, lead screw sleeve column 108 and central lead screw 109, intake pipe 102 is installed to step motor 101's front end, canister casing 103 is installed to step motor 101's below, and canister casing 103's inside is provided with inner tube 104, filtration pore 105 has been seted up to inner tube 104's inner wall, inner tube 104's inside is provided with filter screen reel 106, and filter screen reel 106's inside is provided with partition plate 107, the inside through connection of partition plate 107 has lead screw sleeve column 108, and the inside through connection of lead screw sleeve column 108 has central lead screw 109.
In the invention: the central axes of the filter tank shell 103 and the inner cylinder 104 are coincident, the filter holes 105 are uniformly distributed along the inner wall of the inner cylinder 104, and the inner cylinder 104 is fixedly connected with the filter screen winding drum 106; inner tube 104 can be effectual for filter screen reel 106 provides the support, maintains the appearance of filter screen reel 106 to and filter screen reel 106 can be effectual for gaseous filtration treatment that provides, can the effectual impurity that reduces gaseous carrying, and inner tube 104 can be effectual for gaseous reposition of redundant personnel passageway that provides through filtration pore 105, can be effectual with gaseous dispersion treatment.
In the invention: the width of the outer wall of the partition plate 107 is equal to the width of the inner wall of the filter screen winding drum 106, the partition plate 107 is fixedly connected with the screw rod sleeve column 108, and the central screw rod 109 is in threaded pair connection with the screw rod sleeve column 108; under servo motor 212's effect, can effectually promote lead screw cover post 108 along the vertical central line direction removal of inner tube 104 through central lead screw 109, and lead screw cover post 108 is connected with spacer plate 107, can be with synchronous motion between spacer plate 107 and the lead screw cover post 108, can the effectual position that changes spacer plate 107, thereby can effectually strike off the not adsorbed dust of co-altitude of filter screen reel 106 inner wall, can effectually clear away the dust, filter screen reel 106 can provide stable filtration for gas.
In the invention: the dirt removing mechanism 2 comprises a dirt groove chamber 201, a dirt discharging port 202, a shifting sheet 203, a through hole 204, a connecting shaft rod 205, a positioning conical gear 206, a first transverse conical gear 207, a connecting cross rod 208, a fixed sleeve plate 209, a second transverse conical gear 210, an adjusting conical gear 211 and a servo motor 212, wherein the dirt discharging port 202 is arranged at the bottom of the outer wall of the dirt groove chamber 201, the shifting sheet 203 is arranged in the dirt groove chamber 201, the through holes 204 are arranged on the left side and the right side of the inner wall of the shifting sheet 203, the connecting shaft rod 205 is connected in the middle of the inner part of the shifting sheet 203 in a penetrating manner, the positioning conical gear 206 is connected to the tail end of the bottom of the connecting shaft rod 205, the first transverse conical gear 207 is installed on one side of the positioning conical gear 206, the connecting cross rod 208 is connected to the input end of the first transverse conical gear 207, the second transverse conical gear 210 is connected to the input end, and a servo motor 212 is connected to an input end of the adjustment bevel gear 211.
In the invention: the through holes 204 are uniformly distributed along the vertical central line direction of the poking sheet 203, and the width of the outer wall of the poking sheet 203 is equal to that of the inner wall of the sewage tank chamber 201; the plectrum 203 can effectually scrape out the adsorbed impurity of dirty groove indoor 201 inner wall to and can effectually promote impurity rotation, can lead out impurity through drain 202, and the resistance that the through-hole 204 can effectually alleviate plectrum 203 and receive.
In the invention: the plectrum 203 is fixedly connected with the positioning bevel gear 206 through the connecting shaft rod 205, the positioning bevel gear 206 is meshed with the first transverse bevel gear 207, the first transverse bevel gear 207 is connected with the second transverse bevel gear 210 through the connecting cross rod 208, the connecting cross rod 208 penetrates through the bottom of the fixed sleeve plate 209, and the second transverse bevel gear 210 is meshed with the adjusting bevel gear 211; under the effect of servo motor 212, can be effectual through adjusting bevel gear 211 promotion second horizontal bevel gear 210 and rotate, and second horizontal bevel gear 210 is connected with first horizontal bevel gear 207 through connecting horizontal pole 208, can be with second horizontal bevel gear 210 and first horizontal bevel gear 207 between synchronous rotation, and first horizontal bevel gear 207 meshes with location bevel gear 206 mutually to location bevel gear 206 can be effectual drive plectrum 203 through connecting axostylus axostyle 205 and rotate, be convenient for handle the impurity of dirty cell chamber 201 inside.
The working principle of the liquid oxygen preparation system is as follows: firstly, gas is introduced into the interior of the canister housing 103 through the gas inlet pipe 102, at this time, the filter screen reel 106 can effectively provide filtering treatment for the gas, and the inner cylinder 104 can effectively provide a flow dividing channel for the gas through the filtering holes 105, then, the servo motor 212 is started, the servo motor 212 pushes the screw rod sleeve column 108 to move along the vertical central line direction of the inner cylinder 104 through the central screw rod 109, the screw rod sleeve column 108 is connected with the partition plate 107, the partition plate 107 and the screw rod sleeve column 108 can synchronously move, and dust adsorbed on the inner wall of the filter screen reel 106 at different heights can be scraped;
then, the servo motor 212 is started, the servo motor 212 pushes the second transverse bevel gear 210 to rotate through the adjusting bevel gear 211, the second transverse bevel gear 210 is connected with the first transverse bevel gear 207 through the connecting cross rod 208, the second transverse bevel gear 210 and the first transverse bevel gear 207 can synchronously rotate, the first transverse bevel gear 207 is meshed with the positioning bevel gear 206, and therefore the positioning bevel gear 206 can effectively drive the shifting piece 203 to rotate through the connecting shaft rod 205, and impurities in the sewage tank chamber 201 can be conveniently treated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. A liquid oxygen preparation system, includes filter mechanism (1), its characterized in that: scrubbing mechanism (2) is installed to the below of filtering mechanism (1), and fixed frame (3) are installed to one side of scrubbing mechanism (2), the inside of fixed frame (3) is provided with connecting pipe (4), and the top of connecting pipe (4) is connected with liquid oxygen storage tank main part (5), the top of liquid oxygen storage tank main part (5) is connected with oxygen recovery pipe (7), and one side of oxygen recovery pipe (7) is connected with and connects heat exchanger (8), one side of connecting heat exchanger (8) is connected with liquid nitrogen output tube (9), and the end-to-end connection of liquid nitrogen output tube (9) bottom has liquid nitrogen storage tank main part (6).
2. The liquid oxygen production system according to claim 1, wherein: filtering mechanism (1) includes step motor (101), intake pipe (102), canister casing (103), inner tube (104), filtration pore (105), filter screen reel (106), partition frame board (107), lead screw socle (108) and central lead screw (109), intake pipe (102) are installed to the front end of step motor (101), canister casing (103) is installed to the below of step motor (101), and the inside of canister casing (103) is provided with inner tube (104), filtration pore (105) have been seted up to the inner wall of inner tube (104), the inside of inner tube (104) is provided with filter screen reel (106), and the inside of filter screen reel (106) is provided with partition frame board (107), the inside through connection of partition frame board (107) has lead screw socle (108), and the inside through connection of lead screw socle (108) has central lead screw (109).
3. The liquid oxygen production system according to claim 2, wherein: the central axes of the filter tank shell (103) and the inner cylinder (104) are coincided, the filter holes (105) are uniformly distributed along the inner wall of the inner cylinder (104), and the inner cylinder (104) is fixedly connected with the filter screen winding drum (106).
4. The liquid oxygen production system according to claim 2, wherein: the width of the outer wall of the partition plate (107) is equal to the width of the inner wall of the filter screen winding drum (106), the partition plate (107) is fixedly connected with the screw rod sleeve column (108), and the central screw rod (109) is in threaded pair connection with the screw rod sleeve column (108).
5. The liquid oxygen production system according to claim 1, wherein: the decontamination mechanism (2) comprises a decontamination groove chamber (201), a sewage outlet (202), a shifting sheet (203), a through hole (204), a connecting shaft rod (205), a positioning conical gear (206), a first transverse conical gear (207), a connecting cross rod (208), a fixed sleeve plate (209), a second transverse conical gear (210), an adjusting conical gear (211) and a servo motor (212), wherein the sewage outlet (202) is arranged at the bottom of the outer wall of the decontamination groove chamber (201), the shifting sheet (203) is arranged in the decontamination groove chamber (201), the through holes (204) are arranged at the left side and the right side of the inner wall of the shifting sheet (203), the connecting shaft rod (205) is connected to the middle part of the inner part of the shifting sheet (203) in a penetrating way, the positioning conical gear (206) is connected to the tail end of the bottom of the connecting shaft rod (205), and the first transverse conical gear (207) is arranged at one side of the, and the input of first horizontal conical gear (207) is connected with and connects horizontal pole (208), the input of connecting horizontal pole (208) is connected with second horizontal conical gear (210), and the top of second horizontal conical gear (210) is installed and is adjusted conical gear (211) to the input of adjusting conical gear (211) is connected with servo motor (212).
6. The liquid oxygen production system according to claim 5, wherein: the through holes (204) are uniformly distributed along the vertical central line direction of the shifting sheet (203), and the width of the outer wall of the shifting sheet (203) is equal to that of the inner wall of the sewage tank chamber (201).
7. The liquid oxygen production system according to claim 5, wherein: the plectrum (203) is fixedly connected with the positioning bevel gear (206) through a connecting shaft rod (205), the positioning bevel gear (206) is meshed with the first transverse bevel gear (207), the first transverse bevel gear (207) is connected with the second transverse bevel gear (210) through a connecting cross rod (208), the connecting cross rod (208) penetrates through the bottom of the fixed sleeve plate (209), and the second transverse bevel gear (210) is meshed with the adjusting bevel gear (211).
CN202011225856.0A 2020-11-05 2020-11-05 Liquid oxygen preparation system Pending CN112452072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011225856.0A CN112452072A (en) 2020-11-05 2020-11-05 Liquid oxygen preparation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011225856.0A CN112452072A (en) 2020-11-05 2020-11-05 Liquid oxygen preparation system

Publications (1)

Publication Number Publication Date
CN112452072A true CN112452072A (en) 2021-03-09

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Application Number Title Priority Date Filing Date
CN202011225856.0A Pending CN112452072A (en) 2020-11-05 2020-11-05 Liquid oxygen preparation system

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CN (1) CN112452072A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202666521U (en) * 2012-03-27 2013-01-16 上海神明控制工程有限公司 Filter device with function of automatic cleaning
CN108379964A (en) * 2018-04-22 2018-08-10 北方民族大学 A kind of cleaning plant of dedusting filter cylinder
CN108434893A (en) * 2018-04-04 2018-08-24 陕西煤业化工集团神木天元化工有限公司 Vertical vacuum scraper type filter device
CN110860149A (en) * 2019-12-18 2020-03-06 张垚坷 Air purification equipment with dust removal function
CN210512327U (en) * 2019-08-13 2020-05-12 安徽加力气体有限公司 High-purity liquid oxygen production device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202666521U (en) * 2012-03-27 2013-01-16 上海神明控制工程有限公司 Filter device with function of automatic cleaning
CN108434893A (en) * 2018-04-04 2018-08-24 陕西煤业化工集团神木天元化工有限公司 Vertical vacuum scraper type filter device
CN108379964A (en) * 2018-04-22 2018-08-10 北方民族大学 A kind of cleaning plant of dedusting filter cylinder
CN210512327U (en) * 2019-08-13 2020-05-12 安徽加力气体有限公司 High-purity liquid oxygen production device
CN110860149A (en) * 2019-12-18 2020-03-06 张垚坷 Air purification equipment with dust removal function

Non-Patent Citations (1)

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Title
杜晓蒙主编: "《建筑垃圾及工业固废再生砖》", 31 May 2019, 中国建材出版社 *

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Application publication date: 20210309