CN113230778B - Waste gas purifying equipment with filtering capability for chemical machinery - Google Patents
Waste gas purifying equipment with filtering capability for chemical machinery Download PDFInfo
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- CN113230778B CN113230778B CN202110329398.3A CN202110329398A CN113230778B CN 113230778 B CN113230778 B CN 113230778B CN 202110329398 A CN202110329398 A CN 202110329398A CN 113230778 B CN113230778 B CN 113230778B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration 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
- B01D46/681—Regeneration 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses waste gas purifying equipment with a filtering function for chemical machinery, which comprises a purifying box, wherein a vertical plate is fixedly connected in the purifying box, a transverse plate is fixedly connected between the vertical plate and the purifying box, a first inner cavity, a second inner cavity and a third inner cavity are formed among the purifying box, the vertical plate and the transverse plate, an air inlet pipe communicated with the first inner cavity is arranged on the purifying box in a penetrating manner, an air outlet pipe communicated with the second inner cavity is arranged on the purifying box in a penetrating manner, and the vertical plate is communicated with the second inner cavity through a first through groove. The invention has reasonable structure, can filter the particle impurities in the waste gas, can remove the harmful gas in the waste gas, can clean the blocked dust removing net automatically without manual cleaning, thereby ensuring the normal filtration and purification of the waste gas, greatly reducing the labor intensity of workers, simultaneously, without stopping the machine and improving the working efficiency.
Description
Technical Field
The invention relates to the technical field of chemical machinery, in particular to waste gas purifying equipment with a filtering function for chemical machinery.
Background
The chemical machinery is a general name of machines and equipment used in chemical industrial production, in order to process raw materials into finished products with certain specifications in chemical production, a series of chemical processes such as raw material pretreatment, chemical reaction, separation and refining of reaction products are often needed, the chemical production process is a process of converting raw materials into products through chemical reaction, and the raw materials can be made into products after passing through a plurality of equipment or a plurality of groups of equipment in sequence in each step and being subjected to treatment in various modes.
Chemical machinery often generates a large amount of industrial waste gas due to chemical reaction or ventilation requirements of other equipment in the production process, so that the waste gas is often concentrated in the production process, filtered and purified and then discharged into the air, but the purification equipment used at present only uses one filter screen plate for removing impurities for filtration, and has poor filtration effect; second, the harmful gas is present in a part of the exhaust gas, and the exhaust gas cannot be effectively treated only by the treatment of the filter screen.
To solve the above problems, we have devised an exhaust gas purifying apparatus for chemical machinery having a filtering function.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides the waste gas purifying equipment with the filtering function for the chemical machinery, which can not only filter particle impurities in waste gas, but also remove harmful gases in the waste gas, and can clean a blocked dust removing net automatically without manual cleaning, thereby ensuring that the filtering and purifying work of the waste gas is normally carried out, greatly reducing the labor intensity of workers, simultaneously, without stopping the machinery, and improving the working efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a chemical machinery exhaust purification equipment with filtering capability, includes the purifying box, fixedly connected with riser in the purifying box, fixedly connected with diaphragm between riser and the purifying box, constitute first inner chamber, second inner chamber and third inner chamber between purifying box, riser and the diaphragm, the intake pipe that is linked together with first inner chamber is installed in the run-through on the purifying box, the outlet duct that is linked together with the second inner chamber is installed in the run-through on the purifying box, the riser is linked together with the second inner chamber through first logical groove, be equipped with the installing frame in the second inner chamber, the upper end of installing frame runs through the upper end of diaphragm and extends to in the third inner chamber, install the dust removal net in the installing frame, install first purification net in the second inner chamber, install the collecting box in the third inner chamber, the collecting box is located the below of dust removal net, the inside top fixedly connected with of second inner chamber, the riser is equipped with fixed connection with the fixed bolster, the fixed bolster is equipped with on the fixed bolster is equipped with the fixed bolster and runs through with the fixed bolster, the fixed bolster is equipped with the fixed bolster, the fixed bolster is connected with the fixed bolster in the fixed bolster, the fixed bolster is connected with the air brush.
Preferably, the first purifying net and the second purifying net are both activated carbon net plates.
Preferably, the mounting frame is fixedly connected with the upper end of the inner wall of the collection box, and the collection box is fixedly connected with the bottom of the purification box through bolts.
Preferably, the transmission mechanism comprises a protection box on the fixed rod, a first bevel gear and a second bevel gear are arranged in the protection box, the short rod and the long rod penetrate through the protection box and are rotationally connected with the protection box, the first bevel gear is fixedly connected with the short rod, and the second bevel gear is connected with the long rod.
Preferably, the driving mechanism comprises a positioning block fixed on the transverse plate, the positioning block transversely penetrates through a sliding rod which is connected with the positioning block in a sliding mode, a rubber block is fixedly connected to one end of the sliding rod, a first magnetic block is fixedly connected to the other end of the sliding rod, a first spring is fixedly connected between the first magnetic block and the positioning block, the first spring is sleeved outside the sliding rod, two second magnetic blocks are fixedly connected to the long rod, and one magnetic pole polarity of the second magnetic block opposite to that of the first magnetic block is the same.
Preferably, the switch mechanism comprises a second through groove which penetrates through the vertical plate, the inner wall of the second through groove is rotationally connected with a sealing block, and a second spring is fixedly connected between the sealing block and the inner bottom of the third inner cavity.
Preferably, the second through groove is eccentrically opposite to the baffle plate.
Preferably, the inner wall of the third inner cavity is fixedly connected with a vertically arranged filter screen.
Compared with the prior art, the invention has the beneficial effects that:
1. along with the time increase to exhaust-gas treatment, then the dust granule on the dust removal net increases, and then lead to the gas permeability of dust removal net to reduce, so, the pressure in first inner chamber and the second inner chamber increases, along with the increase of pressure, final waste gas extrudes the sealing block and makes it rotate, then waste gas blows to the baffle through the second through groove, the baffle removes and drives the fixed block and rotate, thereby realize the stock rotation, the stock rotation drives second bevel gear and first bevel gear rotation, thereby realize the quarter turn, the quarter turn rotates and drives the cleaning brush and rotate, can clear up on the dust removal net through the cleaning brush.
2. Simultaneously, the stock rotates and drives two second magnetic path and rotate, can intermittent type nature when the second magnetic path rotates and is relative with first magnetic path, because the magnetic pole polarity of first magnetic path and second magnetic path opposite face is the same, because repulsion then first magnetic path, slide bar and rubber block remove, the rubber block striking installing frame, under the effect of first spring, can realize the reset of first magnetic path, so can the continuous rotation of stock, can realize the striking installing frame of rubber block intermittent type nature, thereby realize the vibrations of dust removal net, it is more effective to the clearance of dust removal net.
3. After the dust removal net is cleaned, and the ventilation quantity is increased, then under the effect of the second spring, the sealing block resets to can continue to carry out waste gas purification treatment through the dust removal net, need not manual treatment, greatly reduced staff's amount of labour, need not to stop machinery when cleaning the dust removal net simultaneously, improved work efficiency.
In conclusion, the invention has reasonable structure, not only can filter the particle impurities in the waste gas, but also can remove the harmful gas in the waste gas, and can clean the blocked dust removing net automatically without manual cleaning, thereby ensuring that the filtering and purifying work of the waste gas is normally carried out, greatly reducing the labor intensity of workers, simultaneously, without stopping the machine, and improving the working efficiency.
Drawings
FIG. 1 is a schematic diagram of a construction of an exhaust gas purifying apparatus for a chemical machine with a filtering function according to the present invention;
FIG. 2 is a schematic diagram showing the connection of a part of the structure of the exhaust gas purifying device with the filtering function for the chemical machinery;
FIG. 3 is an enlarged view of the structure A of the exhaust gas purifying device with filtering function for chemical machinery according to the present invention;
fig. 4 is a top view of a second through groove and a baffle plate in the exhaust gas purifying apparatus for chemical machinery with a filtering function according to the present invention.
In the figure: 1 purifying box, 2 vertical plates, 3 transverse plates, 4 air inlet pipes, 5 air outlet pipes, 6 conveying pipes, 7 one-way valves, 8 first inner cavities, 9 second inner cavities, 10 third inner cavities, 11 first through grooves, 12 second through grooves, 13 sealing blocks, 14 second springs, 15 collecting boxes, 16 first purifying nets, 17 second purifying nets, 18 mounting frames, 19 dust removing nets, 20 cleaning brushes, 21 fixing rods, 22 short rods, 23 protecting boxes, 24 first bevel gears, 25 second bevel gears, 26 long rods, 27 fixing blocks, 28 baffle plates, 29 second magnetic blocks, 30 first magnetic blocks, 31 positioning blocks, 32 first springs, 33 sliding rods, 34 rubber blocks and 35 filter screens.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-4, an exhaust gas purifying device for chemical machinery with a filtering function comprises a purifying box 1, wherein a vertical plate 2 is fixedly connected in the purifying box 1, a transverse plate 3 is fixedly connected between the vertical plate 2 and the purifying box 1, a first inner cavity 8, a second inner cavity 9 and a third inner cavity 10 are formed among the purifying box 1, the vertical plate 2 and the transverse plate 3, and the vertical plate 2 and the transverse plate 3 are fixedly connected with the inner wall of the purifying box 1 in a sealing way.
The purifying box 1 is provided with an air inlet pipe 4 communicated with a first inner cavity 8 in a penetrating manner, the purifying box 1 is provided with an air outlet pipe 5 communicated with a second inner cavity 9 in a penetrating manner, a vertical plate 2 is communicated with the second inner cavity 9 through a first through groove 11, a mounting frame 18 is arranged in the second inner cavity 9, the upper end of the mounting frame 18 penetrates through the upper end of the transverse plate 3 and extends into a third inner cavity 10, the transverse plate 3 penetrates through a groove body up and down, and the mounting frame 18 penetrates through the groove body to be arranged and in sliding connection with the groove body.
The dust removing net 19 is arranged in the mounting frame 18, the first purifying net 16 is arranged in the second inner cavity 9, the second purifying net 17 is arranged in the third inner cavity 10, the first purifying net 16 and the second purifying net 17 are arranged close to the air outlet pipe 5, and the first purifying net 16 and the second purifying net 17 are all active carbon net plates, so that harmful gases in waste gas can be removed.
The collecting box 15 is installed to the bottom of purifying box 1, and collecting box 15 is located the below of dust removal net 19, and mounting frame 18 and collecting box 15's inner wall upper end fixed connection, and collecting box 15 passes through the bottom fixed connection of bolt and purifying box 1, demolishs collecting box 15 promptly and can tear down mounting frame 18, and then can take off dust removal net 19, is convenient for thoroughly clear up and change.
The interior top fixedly connected with dead lever 21 of second inner chamber 9, dead lever 21 runs through be equipped with rather than rotate the quarter butt 22 of being connected, fixedly connected with cleaning brush 20 on the quarter butt 22, cleaning brush 20 offsets rather than dust removal net 19, the diaphragm 3 runs through from top to bottom be equipped with rather than rotate the stock 26 of being connected, be equipped with drive mechanism between stock 26 and the quarter butt 22, drive mechanism includes the protection box 23 on dead lever 21, be equipped with first bevel gear 24 and second bevel gear 25 in the protection box 23, quarter butt 22 and stock 26 all run through protection box 23 and rotate to be connected with it, and first bevel gear 24 and quarter butt 22 fixed connection, second bevel gear 25 is connected with stock 26.
The upper end of stock 26 is located third inner chamber 10 and fixedly connected with fixed block 27, fixedly connected with four baffles 28 on the fixed block 27, be equipped with actuating mechanism between stock 26 and diaphragm 3 and the installing frame 18, actuating mechanism is including fixing the locating piece 31 on diaphragm 3, locating piece 31 transversely run through be equipped with rather than sliding connection's slide bar 33, the one end fixedly connected with rubber piece 34 of slide bar 33, the other end fixedly connected with first magnetic path 30 of slide bar 33, fixedly connected with first spring 32 between first magnetic path 30 and the locating piece 31, first spring 32 cover is in the outside of slide bar 33, fixedly connected with two second magnetic path 29 on the stock 26, the one side magnetic pole polarity that second magnetic path 29 is opposite rather than first magnetic path 30 is the same.
The vertical plate 2 is provided with a switch mechanism opposite to the baffle 28, and the switch mechanism comprises a second through groove 12 which penetrates through the vertical plate 2, and the second through groove 12 is eccentrically opposite to the baffle 28; the inner wall of the second through groove 12 is rotatably connected with a sealing block 13, and a second spring 14 is fixedly connected between the sealing block 13 and the inner bottom of the third inner cavity 10.
A conveying pipe 6 is arranged on the purifying box 1 in a penetrating way, the conveying pipe 6 is communicated with the air outlet pipe 5, and a one-way valve 7 is arranged on the conveying pipe 6; the inner wall of the third inner cavity 10 is fixedly connected with a vertically arranged filter screen 35, so that exhaust gas can be filtered.
In the invention, waste gas enters the first inner cavity 8 through the air inlet pipe 4, flows into the second inner cavity 9 through the first through groove 11, sequentially passes through the dust removing net 19 and the first purifying net 16, and finally is discharged through the air outlet pipe 5; dust particles in the exhaust gas can be filtered through the dust removing net 19, and harmful gases in the exhaust gas can be treated through the first purifying net 16;
as the time for treating the waste gas increases, dust particles on the dust removing net 19 increase, and the air permeability of the dust removing net 19 is reduced, so that the pressure in the first inner cavity 8 and the second inner cavity 9 increases, and as the pressure increases, the waste gas finally presses the sealing block 13 and rotates, and then the waste gas blows to the baffle 28 through the second through groove 12, the baffle 28 moves to drive the fixed block 27 to rotate, thereby realizing the rotation of the long rod 26, the rotation of the long rod 26 drives the second bevel gear 25 and the first bevel gear 24 to rotate, thereby realizing the rotation of the short rod 22, the rotation of the short rod 22 drives the cleaning brush 20 to rotate, and the cleaning on the dust removing net 19 can be cleaned through the cleaning brush 20;
meanwhile, the long rod 26 rotates to drive the two second magnetic blocks 29 to rotate, the second magnetic blocks 29 intermittently face the first magnetic blocks 30 when rotating, and because the polarities of the magnetic poles of the opposite faces of the first magnetic blocks 30 and the second magnetic blocks 29 are the same, the first magnetic blocks 30, the sliding rods 33 and the rubber blocks 34 move due to repulsive force, the rubber blocks 34 strike the mounting frame 18, and the first magnetic blocks 30 can be reset under the action of the first springs 32, so that the long rod 26 can continuously rotate, the rubber blocks 34 can intermittently strike the mounting frame 18, vibration of the dust removal net 19 is realized, and cleaning of the dust removal net 19 is more effective;
the final exhaust gas is discharged through the filter screen 35, the second purifying net 17, the conveying pipe 6 and the one-way valve 7;
after the dust removing net 19 is cleaned, and the ventilation quantity is increased, the sealing block 13 is reset under the action of the second spring 14, so that waste gas purification treatment can be continued through the dust removing net 19 without manual treatment, the labor quantity of workers is greatly reduced, and meanwhile, the dust removing net 19 is cleaned without stopping machinery, so that the working efficiency is improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (6)
1. The utility model provides an exhaust gas purification equipment for chemical machinery with filtering capability, includes purifying box (1), its characterized in that, purifying box (1) internal fixation has riser (2), fixedly connected with diaphragm (3) between riser (2) and purifying box (1), constitute first inner chamber (8), second inner chamber (9) and third inner chamber (10) between purifying box (1), riser (2) and diaphragm (3), install intake pipe (4) that are linked together with first inner chamber (8) run through on purifying box (1), install outlet duct (5) that are linked together with second inner chamber (9) run through on purifying box (1), riser (2) are linked together with second inner chamber (9) through first logical groove (11), be equipped with in second inner chamber (9) installing frame (18), the upper end of installing frame (18) runs through the upper end of diaphragm (3) and extends to in third inner chamber (10), install dust removal net (19) in installing frame (18), install second inner net (16) in second inner chamber (17) are close to second inner chamber (17), the cleaning box is characterized in that a collecting box (15) is arranged at the bottom of the cleaning box (1), the collecting box (15) is located below the dust removing net (19), a fixed rod (21) is fixedly connected to the inner top of the second inner cavity (9), a short rod (22) which is rotationally connected with the fixed rod (21) is penetrated and arranged, a cleaning brush (20) is fixedly connected to the short rod (22), the cleaning brush (20) abuts against the dust removing net (19), a long rod (26) which is rotationally connected with the transverse plate (3) is penetrated and arranged up and down, a transmission mechanism is arranged between the long rod (26) and the short rod (22), the upper end of the long rod (26) is located in the third inner cavity (10) and is fixedly connected with a fixed block (27), four baffles (28) are fixedly connected to the fixed block (27), a driving mechanism is arranged between the long rod (26) and the transverse plate (3) and the mounting frame (18), a switching mechanism which is opposite to the baffles (28) is arranged on the vertical plate (2), a cleaning box (1) which is rotationally connected with the transverse plate (2), a conveying pipe (6) is penetrated and is provided with a conveying pipe (6), and the conveying pipe (6) is communicated with the conveying pipe (6);
the transmission mechanism comprises a protection box (23) on a fixed rod (21), a first bevel gear (24) and a second bevel gear (25) are arranged in the protection box (23), a short rod (22) and a long rod (26) penetrate through the protection box (23) and are in rotary connection with the protection box, the first bevel gear (24) is fixedly connected with the short rod (22), and the second bevel gear (25) is connected with the long rod (26);
the driving mechanism comprises a positioning block (31) fixed on a transverse plate (3), the positioning block (31) transversely penetrates through a sliding rod (33) which is connected with the positioning block in a sliding mode, one end of the sliding rod (33) is fixedly connected with a rubber block (34), the other end of the sliding rod (33) is fixedly connected with a first magnetic block (30), a first spring (32) is fixedly connected between the first magnetic block (30) and the positioning block (31), the first spring (32) is sleeved outside the sliding rod (33), two second magnetic blocks (29) are fixedly connected on a long rod (26), and one magnetic pole polarity of the second magnetic block (29) opposite to that of the first magnetic block (30) is the same.
2. The exhaust gas purifying apparatus for chemical machinery having a filtering function according to claim 1, wherein the first purifying net (16) and the second purifying net (17) are both activated carbon net plates.
3. The waste gas purifying device for chemical machinery with the filtering function according to claim 1, wherein the mounting frame (18) is fixedly connected with the upper end of the inner wall of the collecting box (15), and the collecting box (15) is fixedly connected with the bottom of the purifying box (1) through bolts.
4. The waste gas purifying apparatus for chemical machinery with the filtering function according to claim 1, wherein the switching mechanism comprises a second through groove (12) which is arranged through the vertical plate (2), a sealing block (13) is rotatably connected to the inner wall of the second through groove (12), and a second spring (14) is fixedly connected between the sealing block (13) and the inner bottom of the third inner cavity (10).
5. An exhaust gas purifying apparatus for a chemical machine having a filtering function according to claim 4, wherein the second through groove (12) is eccentrically opposed to the baffle plate (28).
6. The waste gas purifying device for chemical machinery with the filtering function according to claim 1, wherein a vertically arranged filter screen (35) is fixedly connected to the inner wall of the third inner cavity (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110329398.3A CN113230778B (en) | 2021-03-28 | 2021-03-28 | Waste gas purifying equipment with filtering capability for chemical machinery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110329398.3A CN113230778B (en) | 2021-03-28 | 2021-03-28 | Waste gas purifying equipment with filtering capability for chemical machinery |
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| CN113230778A CN113230778A (en) | 2021-08-10 |
| CN113230778B true CN113230778B (en) | 2023-04-25 |
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| CN114307431A (en) * | 2021-12-23 | 2022-04-12 | 山东交通职业学院 | Be applied to ocean vessel's multi-functional emission reduction energy-saving equipment |
| CN114602269B (en) * | 2022-04-08 | 2023-08-04 | 江苏省特种设备安全监督检验研究院 | Flue gas separation and purification device for boiler denitration |
| CN114642928B (en) * | 2022-04-29 | 2023-03-24 | 南通市征荣冷冻设备制造有限公司 | Air filtering device of refrigeration house matched with freeze drying equipment in sterile workshop |
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Effective date of registration: 20230328 Address after: 251400 East of National Highway 220, No. 3, Qudi Town, Jiyang County, Jinan City, Shandong Province (50 meters west of Qudi Liwang Village) Applicant after: Jinan Hongfeng Chemical Co.,Ltd. Address before: 643000 No. 104, Ziyou Road, Ziliujing District, Zigong City, Sichuan Province Applicant before: Huang Yupeng |
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