CN111603851A - Dust removal device for production workshop of fused quartz ceramic products - Google Patents

Dust removal device for production workshop of fused quartz ceramic products Download PDF

Info

Publication number
CN111603851A
CN111603851A CN201910134862.6A CN201910134862A CN111603851A CN 111603851 A CN111603851 A CN 111603851A CN 201910134862 A CN201910134862 A CN 201910134862A CN 111603851 A CN111603851 A CN 111603851A
Authority
CN
China
Prior art keywords
outer box
fixed
dust removal
air
bracket
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
CN201910134862.6A
Other languages
Chinese (zh)
Inventor
不公告发明人
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.)
Xuzhou Connor Hi Tech Materials Science And Technology Co ltd
Original Assignee
Xuzhou Connor Hi Tech Materials Science And Technology 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 Xuzhou Connor Hi Tech Materials Science And Technology Co ltd filed Critical Xuzhou Connor Hi Tech Materials Science And Technology Co ltd
Priority to CN201910134862.6A priority Critical patent/CN111603851A/en
Publication of CN111603851A publication Critical patent/CN111603851A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • B01D46/56Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B01D46/645Protecting screens at filter inlet or outlet
    • 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
    • B01D46/0027Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • 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
    • B01D46/0039Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
    • 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
    • B01D46/10Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B01D46/12Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
    • 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
    • B01D46/42Auxiliary equipment or operation thereof
    • 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
    • B01D46/42Auxiliary equipment or operation thereof
    • B01D46/44Auxiliary equipment or operation thereof controlling filtration
    • B01D46/442Auxiliary equipment or operation thereof controlling filtration by measuring the concentration of particles
    • 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
    • B01D46/42Auxiliary equipment or operation thereof
    • B01D46/44Auxiliary equipment or operation thereof controlling filtration
    • B01D46/448Auxiliary equipment or operation thereof controlling filtration by temperature measuring
    • 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
    • B01D46/56Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B01D46/64Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
    • 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
    • B01D46/88Replacing filter elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2221/00Applications of separation devices
    • B01D2221/08Mobile separation devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2221/00Applications of separation devices
    • B01D2221/14Separation devices for workshops, car or semiconductor industry, e.g. for separating chips and other machining residues
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2221/00Applications of separation devices
    • B01D2221/16Separation devices for cleaning ambient air, e.g. air along roads or air in cities

Abstract

The invention discloses a dust removal device for a fused quartz ceramic product production workshop, which comprises an outer box body, an induced draft fan, a condenser, a temperature sensor and an air detector, wherein the induced draft fan is fixed at the central position of the bottom of the outer box body, a bracket is welded at the central position of the inner side wall of the outer box body, an air gathering channel is installed at the central position inside the bracket, the bottom end of the air gathering channel is communicated with the top of the induced draft fan, the condenser is fixed on each of two sides of the bottom end of the bracket, one side of the condenser is mutually contacted with the outer side wall of the air gathering channel, the temperature sensor is installed on the outer side wall of the outer box body, the air detector is fixed on the outer side wall of the outer box body on one side of the. The invention not only reduces the maintenance cost of the dust removal device, improves the working quality of the dust removal device, but also improves the working environment of a production workshop.

Description

Dust removal device for production workshop of fused quartz ceramic products
Technical Field
The invention relates to the technical field of workshop dust removal devices, in particular to a dust removal device for a workshop for producing fused quartz ceramic products.
Background
In the production process of the fused silica ceramic product, because of the characteristics of raw materials and processing technology, a large amount of dust is easily generated, and in order to maintain the environment of a production workshop and ensure the safety of production activities, a dust removal device with a certain specification is generally required to be arranged in the production workshop.
However, the existing dust removal device for the production workshop of the fused quartz ceramic product still has certain problems, and the specific problems are as follows:
1. the existing dust removal device adopts an integrated mechanism, is inconvenient to flexibly disassemble and replace and generally needs professional staff to overhaul, so that the maintenance cost is relatively high each time;
2. the dust removal in a general dust removal device is relatively single, an effective purification function is lacked, and the working quality of the general dust removal device is often difficult to meet the dust removal requirement of an actual production workshop;
3. because the fused silica ceramic product releases heat in a large amount in the production process, and a common dust removal device lacks an effective cooling function, the working environment of a production workshop is often severe.
Disclosure of Invention
The invention aims to provide a dust removal device for a production workshop of a fused quartz ceramic product, which aims to solve the problems of high maintenance cost, poor working quality and severe working environment of the device in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a dust removal device for a production workshop of fused quartz ceramic products comprises an outer box body, an induced draft fan, a condenser, a temperature sensor and an air detector, wherein the induced draft fan is fixed at the central position of the bottom of the outer box body, a bracket is welded at the central position of the inner side wall of the outer box body, an air gathering channel is installed at the central position of the interior of the bracket, the bottom end of the air gathering channel is communicated with the top of the induced draft fan, the condenser is fixed at the two sides of the bottom end of the bracket, one side of the condenser is in mutual contact with the outer side wall of the air gathering channel, the temperature sensor is installed on the outer side wall of the outer box body, the air detector is fixed on the outer side wall of the outer box body on one side of the temperature sensor, a control panel is inlaid on the outer side wall of the bottom of the, the input end of the PLC controller in the control panel is electrically connected with the temperature sensor and the output end of the air detector respectively.
Preferably, be equipped with the butt joint draw-in groove on the inside wall at outer box top, the air inlet otter board is installed at the top of outer box simultaneously, and the border position department and the mutual joint of butt joint draw-in groove of air inlet otter board.
Preferably, the bottom of outer box is fixed with the bottom plate, and the corner position department of bottom plate bottom all installs the universal wheel.
Preferably, the side walls of the outer boxes on the two sides of the induced draft fan are provided with air exhaust grooves at equal intervals, and the air exhaust grooves are downward opened.
Preferably, fine filter screens with equal intervals are installed at the top of the air gathering channel, and an active carbon filter is fixed at the bottom of the air gathering channel.
Preferably, all be fixed with equidistant horizontal slide rail on the two inside walls of outer box of bracket top, be equipped with the cavity on the outer box lateral wall of horizontal slide rail position department, the top of horizontal slide rail all the joint has coarse filtration net simultaneously, and the one end of coarse filtration net all extends to the inside of cavity.
Compared with the prior art, the invention has the beneficial effects that: the dust removal device for the production workshop of the fused quartz ceramic product not only reduces the maintenance cost of the dust removal device, improves the working quality of the dust removal device, but also improves the working environment of the production workshop;
1. the bottom plate is fixed at the bottom end of the outer box body, the universal wheels are installed at the bottom end of the bottom plate, the butt joint clamping grooves are formed in the top of the outer box body, the horizontal sliding rails are fixed on the two inner side walls of the outer box body, and the cavity is formed in the position, at the position of the horizontal sliding rails, of the side wall of the outer box body, so that the function of facilitating installation and replacement of the dust removal device is achieved, and the maintenance cost of the dust removal device is reduced;
2. the air detector is fixed on the outer side wall of the outer box body, the draught fan and the exhaust groove are arranged at the bottom of the outer box body, the air gathering channel is arranged in the bracket, the fine filter screen and the activated carbon filter are arranged in the air gathering channel, and the coarse filter screen is clamped at the top of the horizontal slide rail, so that the multi-stage dust removal and purification functions of the dust removal device are realized, and the working quality of the dust removal device is improved;
3. the condensers are fixed on two sides of the bottom end of the bracket, and the temperature sensor is arranged on the outer side wall of the outer box body, so that the automatic cooling function of the dust removal device is realized, and the working environment of a production workshop is improved.
Drawings
FIG. 1 is a schematic cross-sectional front view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic diagram of the system framework of the present invention.
In the figure: 1. an outer case; 2. an induced draft fan; 3. a wind gathering channel; 4. a condenser; 5. a bracket; 6. a horizontal slide rail; 7. butting the clamping grooves; 8. an air inlet net plate; 9. a coarse filter screen; 10. a fine filter screen; 11. an activated carbon filter; 12. an exhaust duct; 13. a base plate; 14. a universal wheel; 15. a temperature sensor; 16. a cavity; 17. an air detector; 18. a control panel.
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. 1-4, an embodiment of the present invention is shown: a dust removal device for a production workshop of fused quartz ceramic products comprises an outer box body 1, an induced draft fan 2, a condenser 4, a temperature sensor 15 and an air detector 17, wherein a butt joint clamping groove 7 is formed in the inner side wall of the top of the outer box body 1, an air inlet screen plate 8 is installed at the top of the outer box body 1, the edge position of the air inlet screen plate 8 is mutually clamped with the butt joint clamping groove 7 to facilitate installation of the butt joint clamping groove 7, a bottom plate 13 is fixed at the bottom end of the outer box body 1, universal wheels 14 are installed at the corner positions of the bottom end of the bottom plate 13 to facilitate movement, the induced draft fan 2 is fixed at the central position of the bottom of the outer box body 1, the type of the induced draft fan 2 can be GY4-68, air exhaust grooves 12 with equal intervals are formed in the side walls of the outer box body 1 on the two sides of the induced draft fan 2, the air exhaust grooves, the two inner side walls of the outer box body 1 above the bracket 5 are all fixed with equidistant horizontal slide rails 6, the side wall of the outer box body 1 at the position of the horizontal slide rails 6 is provided with a cavity 16, meanwhile, the top of each horizontal slide rail 6 is clamped with a coarse filter screen 9, one end of each coarse filter screen 9 extends into the cavity 16 for preliminary dust removal and convenient replacement and maintenance, the central position inside the bracket 5 is provided with a wind gathering channel 3, the bottom end of the wind gathering channel 3 is communicated with the top of a draught fan 2, the top of the wind gathering channel 3 is provided with equidistant fine filter screens 10, the bottom of the wind gathering channel 3 is fixed with an active carbon filter 11 for secondary dust removal and peculiar smell elimination, the two sides of the bottom end of the bracket 5 are both fixed with condensers 4, the types of the condensers 4 can be DWN-300, and one sides of the condensers 4 are all contacted with the outer side wall of the wind gathering channel 3, install temperature sensor 15 on the lateral wall of outer box 1, this temperature sensor 15's model can be PT100, be fixed with air detector 17 on the lateral wall of the outer box 1 of temperature sensor 15 one side, this air detector 17's model can be GW3016, it has control panel 18 to inlay on the lateral wall of outer box 1 bottom, this control panel 18's model can be TC55A, and control panel 18 inside PLC controller's output respectively with draught fan 2, condenser 4's input electric connection, control panel 18 inside PLC controller's input respectively with temperature sensor 15, air detector 17's output electric connection.
The working principle is as follows: when the dust removal device is used, firstly, the control panel 18 is controlled, the dust removal device is electrified to operate automatically, when the air detector 17 detects that the content of particulate matters in air in a production workshop exceeds a set value, the draught fan 2 is immediately started, dust-containing gas enters the inner part of the outer box body 1 through the air inlet mesh plate 8, then sequentially passes through the coarse filter screen 9, the fine filter screen 10 and the active carbon filter 11, and finally is purified and discharged by the exhaust groove 12, in the process, dust is eliminated in the first two stages, and residual peculiar smell and microorganisms are adsorbed by active carbon, meanwhile, when the temperature sensor 15 detects that the temperature of the air exceeds the set value, the condenser 4 is immediately started to efficiently exchange heat and cool the air gathering channel 3 and purified gas around, so that the temperature of the production workshop is kept normal, in addition, the coarse filter screen 9 for gathering dust is extracted at intervals, the new coarse filter screen 9 is replaced, when the dust removal device needs to be overhauled, the air inlet screen plate 8 at the butt joint clamping groove 7 is taken down, then the coarse filter screen 9, the air gathering channel 3 and other components are taken out in sequence to complete corresponding overhauling work, and finally all the work of the dust removal device is completed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides a fused quartz ceramic product workshop dust collector, includes outer box (1), draught fan (2), condenser (4), temperature sensor (15) and air detector (17), its characterized in that: the utility model discloses a fan for air conditioner, including outer box (1), the central point of outer box (1) bottom puts the department and is fixed with draught fan (2), the central point of outer box (1) inside wall puts the welding of department has bracket (5), and the central point of bracket (5) inside puts the department and installs and gather wind passageway (3), and gathers the bottom of wind passageway (3) and the top of draught fan (2) and be linked together, the both sides of bracket (5) bottom all are fixed with condenser (4), and one side of condenser (4) all with gather the lateral wall in wind passageway (3) and contact each other, install temperature sensor (15) on the lateral wall of outer box (1), be fixed with air detector (17) on the lateral wall of the outer box (1) of temperature sensor (15) one side, it has control panel (18) to inlay on the lateral wall of outer box (1) bottom, and the output of control panel (18) inside PLC controller respectively with draught fan, The input end of the condenser (4) is electrically connected, and the input end of the PLC in the control panel (18) is respectively electrically connected with the output ends of the temperature sensor (15) and the air detector (17).
2. The dust removing device for the fused silica ceramic ware manufacturing plant according to claim 1, wherein: be equipped with butt joint draw-in groove (7) on the inside wall at outer box (1) top, air inlet otter board (8) are installed at the top of outer box (1) simultaneously, and the border position department of air inlet otter board (8) and the mutual joint of butt joint draw-in groove (7).
3. The dust removing device for the fused silica ceramic ware manufacturing plant according to claim 1, wherein: the bottom end of the outer box body (1) is fixed with a bottom plate (13), and universal wheels (14) are mounted at the corner positions of the bottom end of the bottom plate (13).
4. The dust removing device for the fused silica ceramic ware manufacturing plant according to claim 1, wherein: the side walls of the outer boxes (1) on the two sides of the induced draft fan (2) are provided with air exhaust grooves (12) at equal intervals, and the air exhaust grooves (12) are all opened downwards.
5. The dust removing device for the fused silica ceramic ware manufacturing plant according to claim 1, wherein: the top of the wind gathering channel (3) is provided with fine filter screens (10) at equal intervals, and the bottom of the wind gathering channel (3) is fixed with an activated carbon filter (11).
6. The dust removing device for the fused silica ceramic ware manufacturing plant according to claim 1, wherein: all be fixed with equidistant horizontal slide rail (6) on two inside walls of outer box (1) of bracket (5) top, be equipped with cavity (16) on outer box (1) lateral wall of horizontal slide rail (6) position department, the top of horizontal slide rail (6) all the joint has coarse filtration net (9) simultaneously, and the one end of coarse filtration net (9) all extends to the inside of cavity (16).
CN201910134862.6A 2019-02-24 2019-02-24 Dust removal device for production workshop of fused quartz ceramic products Pending CN111603851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910134862.6A CN111603851A (en) 2019-02-24 2019-02-24 Dust removal device for production workshop of fused quartz ceramic products

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910134862.6A CN111603851A (en) 2019-02-24 2019-02-24 Dust removal device for production workshop of fused quartz ceramic products

Publications (1)

Publication Number Publication Date
CN111603851A true CN111603851A (en) 2020-09-01

Family

ID=72204504

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910134862.6A Pending CN111603851A (en) 2019-02-24 2019-02-24 Dust removal device for production workshop of fused quartz ceramic products

Country Status (1)

Country Link
CN (1) CN111603851A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112720264A (en) * 2020-12-05 2021-04-30 上海硅莱医疗器械有限公司 Dust collector
CN112742126A (en) * 2021-01-07 2021-05-04 艾丽娜 Glass dust removal equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112720264A (en) * 2020-12-05 2021-04-30 上海硅莱医疗器械有限公司 Dust collector
CN112742126A (en) * 2021-01-07 2021-05-04 艾丽娜 Glass dust removal equipment

Similar Documents

Publication Publication Date Title
CN111603851A (en) Dust removal device for production workshop of fused quartz ceramic products
CN210251612U (en) A purifier for coating workshop
CN202028597U (en) Automatic dust removal equipment for dust workshop
CN205245377U (en) Multi -functional air purification equipment
CN209735153U (en) Dust removal device for production workshop of fused quartz ceramic products
CN204272591U (en) Camera module intelligent plaster is installed
CN201431826Y (en) Cloth bag dust remover
CN201969438U (en) Chambered pulse back-flushing bag type dust collector
CN211462588U (en) Outdoor dust removal tower
CN212550959U (en) Airborne electric automation equipment dust collector
CN113587299A (en) Assembled energy-conserving building environmental protection wall body air purification ventilation equipment
CN209257116U (en) Dust-extraction unit is used in a kind of work of lithium battery cutting machine
CN208296165U (en) A kind of energy-saving bedroom air purifier
CN205702015U (en) lithium ion battery die-cutting machine
CN219503976U (en) Welding robot smoke and dust removal clarifier
CN201275514Y (en) Filtering type glue-spraying house
CN216814495U (en) Ventilation device for intelligent factory workshop with air quality detection and purification functions
CN213841231U (en) Air purifier convenient to overhaul and maintain
CN202702208U (en) Purifying work station
CN217929174U (en) Intelligent control device of intelligent purification workshop
CN211245861U (en) Purifier is cultivateed to stem of noble dendrobium
CN217654059U (en) Air filter for purification
CN213316720U (en) Waste gas purification and discharge device for spandex production
CN213379538U (en) Refractory material cutting processing equipment
CN219451660U (en) Anti-pollution processing workshop

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20200901

WD01 Invention patent application deemed withdrawn after publication