CN107970680A - A kind of paper tape formula ungrease treatment filtration system and method with precoating function - Google Patents
A kind of paper tape formula ungrease treatment filtration system and method with precoating function Download PDFInfo
- Publication number
- CN107970680A CN107970680A CN201711235459.XA CN201711235459A CN107970680A CN 107970680 A CN107970680 A CN 107970680A CN 201711235459 A CN201711235459 A CN 201711235459A CN 107970680 A CN107970680 A CN 107970680A
- Authority
- CN
- China
- Prior art keywords
- paper
- filter
- filter chamber
- lye
- pipe
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/003—Filters in combination with devices for the removal of liquids
- B01D36/006—Purge means
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
- Filtration Of Liquid (AREA)
Abstract
The present invention proposes a kind of paper tape formula ungrease treatment filtration system and method with precoating function, including following content：S1 filter paper band) is installed in filter chamber, is tensioned filter paper band, crawl reel machine tightens paper tape；S2 the mixed liquor of water and cellulose) is added into filter chamber by dosing mixer, indoor filter paper band retention cellulose is filtered and completes pre- Tu；S3) the pending lye input filter chamber in lye tank (vat) is filtered, when filter paper is blocked by dirt, stops conveying lye into filter chamber, compressed air is inputted into filter chamber, cellulose on filter paper band is blown；S4) starting reel machine drives filter paper to advance, scraper plate wipes the cellulose on filter paper off, filter paper after use stops reel machine after having scraped, complete a filtering and paper feed process, the present invention uses medium of the cellulose as greasy dirt in absorption degreaser, the oil and other impurities in degreasing lye can be effectively removed, prevents to electroplate piebald defect completely.
Description
Technical field
At the technical field of degreaser filtering, more particularly to a kind of paper tape formula degreasing with precoating function
Manage filtration system and method.
Background technology
The processing of Electrolytic Galvanizing Line cleaning by degreasing is electrolytic degreasing, and electrolytic degreasing is to infiltrate strip into degreaser, is passed through
It is powered between strip and pole plate and carrys out electrolysis water, so as to is produced in belt steel surface residual inside the next profound cleaning strip of intensive minute bubbles
Stay 10% grease and impurity.
Grease and impurity after cleaning by degreasing strip, are present in degreasing tank liquor, and existing unit cleaning section does not design
The filtration apparatus of degreaser, so degreaser can only lean on periodically discharge to remove grease and impurity, not only the consumption of degreaser is larger,
Wastewater treatment difficulty is also increased, cost is higher, and the cleannes of degreaser are also difficult to ensure, easily causes the surfaces such as plating piebald
Mass defect.
The content of the invention
The technical problems to be solved by the invention are to be directed to above-mentioned problem, there is provided a kind of carry precoats function
Paper tape formula ungrease treatment filtration system and method, have selected medium of the cellulose as greasy dirt in absorption degreaser, effect is very
Space is significantly not take up, and any influence will not be produced on the composition and effect of degreaser.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of paper tape formula degreasing with precoating function
Handle filtration system, it is characterised in that including filter chamber, dosing mixer, alkali liquid tank and lye tank (vat), the lye tank (vat) passes through alkali
Liquid inlet pipe is connected with the inlet of the filter chamber, and the air inlet of filter chamber is connected by air inlet pipe with compressed gas source, mistake
The leakage fluid dram of filter chamber bottom is connected with liquid header, and the liquid header is connected with blow-off pipe and recovery tube manifold respectively,
The setting corresponding with dirt discharge groove of the mouth of pipe of the blow-off pipe, the recovery tube manifold are connected with drug-feeding tube and recycling branch pipe respectively
Logical, the drug-feeding tube is connected with the feeding opening at the top of the dosing mixer, and the recycling branch pipe is connected with the alkali liquid tank
It is logical, water inlet is additionally provided with the top of dosing mixer, the water inlet is connected by water inlet pipe with water source, dosing stirring motor spindle
Drug row mouth be connected by drug row pipe with the lye inlet pipe.
By such scheme, filter plate is equipped with along axis inside the filter chamber, the paper feed side of filter chamber is equipped with filtering paper roll
Cylinder, the uncoiling end of the filtering paper bobbin enter filter chamber through paper feed side, stretch out through paper delivery side and be connected with reel machine, filter
Paper is layed on the filter plate, and paper delivery side is equipped with scraper plate, and the scraper plate is abutted against with filter paper section of stretching out, is equipped with below scraper plate
Collect truck.
By such scheme, the paper feed side and paper delivery side of the filter chamber are equipped with sealing cover, the sealing cover end face outside
Center is connected with the piston rod of hydraulic cylinder.
By such scheme, the lye inlet pipe is equipped with force (forcing) pump, and the drug row pipe is equipped with dosing pump.
By such scheme, the filter chamber is made of stainless steel, and filter chamber is equipped with pressure gauge and pressure alarm device.
By such scheme, oil suction fibre is coated on the filter paper.
A kind of filter method of the paper tape formula ungrease treatment filtration system with precoating function, it is characterised in that including such as
Lower step：
S1) filter plant prepares, and opens the sealing cover at filter chamber both ends, installs filtering paper bobbin, paper tape was passed through
Filter chamber, location and installation scraper plate, by paper tape around being entangled on reel machine, blend compounds band cements, and adjusts reel machine, makes filter paper band
Tightly, crawl reel machine, checks whether paper tape has deviation phenomenon, and crawl reel machine, stops reel machine after paper tape is tightened, closed
The sealing cover at filter chamber both ends, completes filtering and prepares；
S2) the pre- Tu of filter paper, the head cover for opening dosing mixer add cellulose, close head cover, start dosing mixer
And dosing pump, the mixed liquor of water and cellulose is added into filter chamber, indoor filter paper band is filtered and retains cellulose, is completed
Dosing mixer and dosing pump are closed after pre- Tu；
S3 filtering) is started, the pending lye in lye tank (vat) is inputted filter chamber by lye inlet pipe is filtered, and is filtered
After the completion of lye flow back into alkali liquid tank by recycling branch pipe, when the liquid level in dosing mixer drops to early warning value, pass through
Drug-feeding tube flows into the lye that filtering has been completed in filter chamber in dosing mixer, until liquid level is gone up to setting value, has served as
When filter paper is blocked, filtering room pressure rise, after reaching preset pressure value, the alarm of pressure alarm device, stops to filter chamber
Interior conveying lye, compressed air is inputted into filter chamber by air inlet pipe, and the cellulose on filter paper band is blown, filtering
The lye of room bottom remaining is discharged by blow-off pipe；
S4) filter paper band paper feed, closes air inlet pipe, starts the paper feed side of filter chamber and the hydraulic cylinder of paper delivery side, opens two
The sealing cover of side, starts reel machine, and reel machine drives filter paper to advance, and the cellulose of the drying on filter paper is wiped off, waits to make by scraper plate
Filter paper after stops reel machine after all having scraped, and scraper plate is retracted, and completes a filtering and paper feed process.
The beneficial effects of the invention are as follows：A kind of paper tape formula ungrease treatment filtration system with precoating function is provided, in electricity
Increase a set of continuous filtration system in galvanizing unit cleaning by degreasing system newly, can be effective by precoating cellulose on filter paper
The grease and impurity in degreaser are removed, degreaser cleannes is solved the problems, such as, has effectively controlled because not washing clean clearly
The generation of caused plating mottling, so that it is guaranteed that plating strip surface quality is intact, improves the recycling rate of degreaser, drops
The low discharge capacity of degreaser, reduces production cost, energy conservation and environmental protection.
Brief description of the drawings
Fig. 1 is the distribution schematic diagram of one embodiment of the invention.
Wherein：1. filter chamber, 2. dosing mixers, 3. lye tank (vat)s, 4. lye inlet pipes, 5. air inlet pipe, 6. liquid headers, 7.
Blow-off pipe, 8. recovery tube manifold, 9. drug-feeding tubes, 10. recycling branch pipes, 11. water inlet pipes, 12. drug row pipes, 13. filtering paper bobbins,
14. reel machine, 15. scraper plates, 16. filter papers, 17. collection trucks, 18. sealing covers, 19. force (forcing) pumps, 20. dirt discharge grooves, 21. dosings
Pump.
Embodiment
To more fully understand the present invention, the invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of paper tape formula ungrease treatment filtration system with precoating function, including filter chamber 1, dosing are stirred
Mix machine 2, alkali liquid tank and lye tank (vat) 3, the lye in alkali liquid tank is discharged into lye tank (vat) after being cleaned to belt steel surface, and lye tank (vat) leads to
Cross lye inlet pipe 4 with the inlet of filter chamber to be connected, lye inlet pipe is equipped with force (forcing) pump 19, and carrying out lifting by force (forcing) pump adds
Pressure, the air inlet of filter chamber are connected by air inlet pipe 5 with compressed gas source, leakage fluid dram and 6 phase of liquid header of filter chamber bottom
Connection, liquid header are connected with blow-off pipe 7 and recovery tube manifold 8 respectively, and the mouth of pipe of blow-off pipe is corresponding with dirt discharge groove 20 to be set
Put, recovery tube manifold is connected with drug-feeding tube 9 and recycling branch pipe 10 respectively, drug-feeding tube and the feeding opening phase at the top of dosing mixer
Connection, recycling branch pipe are connected with lye tank (vat), are additionally provided with water inlet at the top of dosing mixer, water inlet passes through water inlet pipe 11 and water
Source is connected, and the drug row mouth of dosing stirring motor spindle is connected by drug row pipe 12 with lye inlet pipe, and drug row pipe is equipped with dosing
Pump 21.
Filter plate is equipped with along axis inside filter chamber, the paper feed side of filter chamber is equipped with filtering paper bobbin 13, filters paper bobbin
Uncoiling end enter filter chamber through paper feed side, stretch out through paper delivery side and be connected with reel machine 14, filter paper 16 is layed in filtering
On plate, filter plate is played a supporting role, and water conservancy diversion collection is carried out to the liquid after filtering and is pooled to filter chamber's leakage fluid dram, paper delivery side
Equipped with scraper plate 15, scraper plate is abutted against with filter paper section of stretching out, and collection truck 17 is equipped with below scraper plate.
The paper feed side and paper delivery side of filter chamber are equipped with the piston of sealing cover 18, sealing cover end face outside center and hydraulic cylinder
Bar is connected, and the unlatching and sealing of filter chamber is controlled by hydraulic cylinder, the installation and dismounting of complement filter paper, sealing cover is by hydraulic cylinder
Energetically be pressed in filter chamber both sides, filter chamber is formed closed cavity.
Filter chamber is made of stainless steel, and has good Corrosion Protection, filter chamber is equipped with pressure gauge and pressure alarm
Device, when filter paper is blocked, filtering room pressure rise, alarms more than pressure warning unit after preset value, stops filtering
Replace paper tape.
Before filtration, first cellulose will be precoated on filter paper, for the oil for being not easy to filter in adsorbent solution, can effectively gone
Except the various impurity in degreaser, solve the problems, such as degreaser cleannes.
The system is to increase the paper tape formula lye mistake of a cuff precoating function newly in original chemical degreasing circulatory system
Filter system, the filtration system use adding pressure type paper tape filtering, and solution carries out lifting pressurization by force (forcing) pump, and dosing mixer can be same
When toward carrying out adding for cellulose in filter chamber, filter paper band retention cellulose, in degreasing liquid pump to filter chamber, filter paper stops
Above filter plate, filter chamber both ends Hydraulic Cylinder sealing cover advance, sealing cover by hydraulic cylinder energetically be pressed in filter chamber two
Side, makes filter chamber form closed cavity, and pressurized solution first passes through the filtering of filter paper, is then led by the collection of filter plate
Discharged after stream from filter chamber bottom leakage fluid dram, final recycling enters in alkali liquid tank in case following cycle uses, when dosing mixer
When interior liquid level drops to early warning value, remaining solution enters in dosing mixer into chemical feed pipe is crossed in filter chamber, until liquid level
Go up to setting value.As filter paper face cellulose is more and more, filtering room pressure rise, when reaching a timing prompting pressure
Power high RST, then stop filtering, solution emptying after open air inlet pipe, toward filter chamber in be passed through compressed gas progress air-blowing, it is right
Cellulose on filter paper carries out desiccation, and paper feed program is carried out after desiccation, carries out during paper feed program that scraper plate can be by filter paper
Dry fiber element wipe off, the cellulose that scraper plate scrapes falls into the in-car that gathers materials, after collection truck fill after transport carry out subsequent treatment,
Continue next filtering after paper feed EP (end of program).
Filtering is carried out using the system to include the following steps：
(1) filter plant is prepared
1st, the sealing cover at filter chamber both ends is opened, filtering paper bobbin is installed, paper tape is passed through into filter chamber, location and installation is scraped
Plate, by paper tape around being entangled on reel machine, blend compounds band cements；
2nd, reel machine is adjusted, filter paper band is become tight；
3rd, crawl reel machine, checks whether paper tape has deviation phenomenon；
4th, crawl reel machine, stops reel machine after paper tape is tightened；
5th, the sealing cover at filter chamber both ends is closed；
6th, prepare medicament it is spare after, it is to be used that equipment preparation terminates etc.；
(2) filter is started
1st, start dosing mixer, while start force (forcing) pump and dosing pump, cellulose, dosing are put into dosing mixer
Dosing process is automatically stopped after pump operation 30S, equipment initially enters filtration condition, the filtering of force (forcing) pump continuous service；
2nd, until filtering room pressure rise, equipment understands autostop and alarms, and filtration condition terminates, and opens air inlet pipe,
At this moment filter paper band and cellulose can be dried for gas, and explanation has filtered indoor liquid all after having the sound in pipeline
Drain, at this moment continue 5~10min of air inlet；
3rd, running scraper plate to close to filter paper position, startup reel machine, reel machine after air inlet drives filter paper to advance,
Scraper plate can wipe the cellulose on filter paper off；
4th, reel machine is stopped after dirty filter paper has all been scraped, scraper plate is retracted, and at this moment filtration system completes a mistake
Filter and paper feed process, repeat filter process if wanting to continue filtering.
Claims (6)
1. a kind of paper tape formula ungrease treatment filtration system with precoating function, it is characterised in that stirred including filter chamber, dosing
Machine, alkali liquid tank and lye tank (vat), the lye tank (vat) are connected by lye inlet pipe with the inlet of the filter chamber, filter chamber into
Gas port is connected by air inlet pipe with compressed gas source, and the leakage fluid dram of filter chamber bottom is connected with liquid header, and the discharge opeing is total
Pipe is connected with blow-off pipe and recovery tube manifold respectively, the mouth of pipe setting corresponding with dirt discharge groove of the blow-off pipe, the recycling
Guan manifold is connected with drug-feeding tube and recycling branch pipe respectively, and the drug-feeding tube is connected with the feeding opening at the top of the dosing mixer
Logical, the recycling branch pipe is connected with the alkali liquid tank, and dosing mixer top is additionally provided with water inlet, the water inlet by into
Water pipe is connected with water source, and the drug row mouth of dosing stirring motor spindle is connected by drug row pipe with the lye inlet pipe.
A kind of 2. paper tape formula ungrease treatment filtration system with precoating function according to claim 1, it is characterised in that
Filter plate is equipped with along axis inside the filter chamber, the paper feed side of filter chamber is equipped with filtering paper bobbin, the filtering paper bobbin
Uncoiling end enters filter chamber through paper feed side, stretches out through paper delivery side and is connected with reel machine, filter paper is layed in the filter plate
On, paper delivery side is equipped with scraper plate, and the scraper plate is abutted against with filter paper section of stretching out, and collection truck is equipped with below scraper plate.
A kind of 3. paper tape formula ungrease treatment filtration system with precoating function according to claim 2, it is characterised in that
The paper feed side and paper delivery side of the filter chamber are equipped with the piston rod of sealing cover, the sealing cover end face outside center and hydraulic cylinder
It is connected.
A kind of 4. paper tape formula ungrease treatment filtration system with precoating function according to claim 3, it is characterised in that
The lye inlet pipe is equipped with force (forcing) pump, and the drug row pipe is equipped with dosing pump.
A kind of 5. paper tape formula ungrease treatment filtration system with precoating function according to claim 4, it is characterised in that
The filter chamber is made of stainless steel, and filter chamber is equipped with pressure gauge and pressure alarm device.
6. a kind of filter method of paper tape formula ungrease treatment filtration system with precoating function described in claim 5 is used,
It is characterised in that it includes following steps：
S1) filter plant prepares, and opens the sealing cover at filter chamber both ends, filtering paper bobbin is installed, by paper tape
Through filter chamber, location and installation scraper plate, by paper tape around being entangled on reel machine, blend compounds band cements, and adjusts reel machine, made
Filter-paper-tape is tensioned, crawl reel machine, checks whether paper tape has deviation phenomenon, and crawl reel machine, stops roll paper after paper tape is tightened
Machine, closes the sealing cover at filter chamber both ends, completes filtering and prepares；
S2) the pre- Tu of filter paper, the head cover for opening dosing mixer add cellulose, close head cover, start
Dosing mixer and dosing pump, the mixed liquor of water and cellulose is added into filter chamber, and filtering indoor filter paper band will
Cellulose retains, and dosing mixer and dosing pump are closed after completing pre- Tu；
S3 filtering) is started, the pending lye in lye tank (vat) is inputted filter chamber by lye inlet pipe is filtered, and filtering is completed
Lye afterwards flows back into alkali liquid tank by recycling branch pipe, when the liquid level in dosing mixer drops to early warning value, by into medicine
Pipe flows into the lye that filtering has been completed in filter chamber in dosing mixer, until liquid level is gone up to setting value, works as filter paper
When being blocked, filtering room pressure rise, after reaching preset pressure value, the alarm of pressure alarm device, stops defeated into filter chamber
Lye is sent, compressed air is inputted into filter chamber by air inlet pipe, the cellulose on filter paper band is blown, filter chamber bottom
The lye of portion's remaining is discharged by blow-off pipe；
S4) filter paper band paper feed, closes air inlet pipe, starts the paper feed side of filter chamber and the hydraulic cylinder of paper delivery side, open both sides
Sealing cover, starts reel machine, and reel machine drives filter paper to advance, and scraper plate wipes the cellulose of the drying on filter paper off, after to be used
Filter paper all scraped after stop reel machine, scraper plate retracts, and completes a filtering and paper feed process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711235459.XA CN107970680B (en) | 2017-11-30 | 2017-11-30 | Paper belt type degreasing treatment filtering system and method with pre-coating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711235459.XA CN107970680B (en) | 2017-11-30 | 2017-11-30 | Paper belt type degreasing treatment filtering system and method with pre-coating function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107970680A true CN107970680A (en) | 2018-05-01 |
| CN107970680B CN107970680B (en) | 2020-01-14 |
Family
ID=62008503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711235459.XA Active CN107970680B (en) | 2017-11-30 | 2017-11-30 | Paper belt type degreasing treatment filtering system and method with pre-coating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107970680B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110150577A (en) * | 2019-05-17 | 2019-08-23 | 上海淳萃食品有限公司 | A kind of preparation method and application for dripping chickens' extract |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105073643A (en) * | 2013-03-14 | 2015-11-18 | 雪佛龙美国公司 | Process, method, and system for removing heavy metals from fluids |
| CN205241309U (en) * | 2015-12-14 | 2016-05-18 | 孙硕 | Hot dipping zinc degrease effluent treatment plant |
| CN206014618U (en) * | 2016-08-30 | 2017-03-15 | 江苏三和环保集团有限公司 | A kind of coating wastewater processing system |
| CN206045518U (en) * | 2016-05-27 | 2017-03-29 | 刘斌 | The board-like vacuum paper tape filter of automatically cleaning arc |
| CN107213698A (en) * | 2017-08-04 | 2017-09-29 | 江苏维泽净化科技股份有限公司 | Cellulose is ground the application of particle occasion in graphite |
-
2017
- 2017-11-30 CN CN201711235459.XA patent/CN107970680B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105073643A (en) * | 2013-03-14 | 2015-11-18 | 雪佛龙美国公司 | Process, method, and system for removing heavy metals from fluids |
| CN205241309U (en) * | 2015-12-14 | 2016-05-18 | 孙硕 | Hot dipping zinc degrease effluent treatment plant |
| CN206045518U (en) * | 2016-05-27 | 2017-03-29 | 刘斌 | The board-like vacuum paper tape filter of automatically cleaning arc |
| CN206014618U (en) * | 2016-08-30 | 2017-03-15 | 江苏三和环保集团有限公司 | A kind of coating wastewater processing system |
| CN107213698A (en) * | 2017-08-04 | 2017-09-29 | 江苏维泽净化科技股份有限公司 | Cellulose is ground the application of particle occasion in graphite |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110150577A (en) * | 2019-05-17 | 2019-08-23 | 上海淳萃食品有限公司 | A kind of preparation method and application for dripping chickens' extract |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107970680B (en) | 2020-01-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206699352U (en) | A kind of agricultural water circulation rotary drum washer | |
| CN101046053B (en) | Washing machine capable of utilizing washing powder and its operation mode | |
| CN107970680A (en) | A kind of paper tape formula ungrease treatment filtration system and method with precoating function | |
| CN212700883U (en) | Precoating filter equipment | |
| CN110935663A (en) | Touch-sensitive screen base plate cleaning device | |
| CN201592021U (en) | Energy-saving filtering recycling device | |
| CN217535958U (en) | Edible vinegar solid-state fermentation equipment | |
| CN217449090U (en) | Single valve control type liquid collecting and clear and turbid separating device of open flow filter press | |
| CN101579591B (en) | Coating filter equipment with alarming function | |
| CN208101008U (en) | A kind of plastic extruder outlet filter | |
| CN207056074U (en) | Stoste recycle device | |
| CN215781929U (en) | Automatic on-line purging filter | |
| CN214414080U (en) | Special thin slice slurry recovery device for heating cigarette thick slurry method | |
| CN203694726U (en) | Belt type rotary drum filter | |
| CN206103514U (en) | Simple and easy high -efficient hair collection device | |
| CN218980646U (en) | Filter cake washing system | |
| CN210251473U (en) | Novel disc type diatomite filter | |
| CN209292687U (en) | A kind of efficient ultrasonic wave added Novel textile machine desizing device | |
| CN202654768U (en) | System for removing active carbon in adipate solution | |
| CN218460456U (en) | Water-saving aluminum coil cleaning device | |
| CN218608329U (en) | Ultrafiltration front-end water inlet cleaning and filtering device applied to double-membrane process | |
| CN218653034U (en) | Hydrogen peroxide raffinate water separator | |
| CN216778151U (en) | Filter cloth cleaning device for flat disc filter | |
| CN219157201U (en) | Washing liquid filtration circulation equipment | |
| CN113842686A (en) | Large-traffic rotary type filtration equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |