CN110180230A - High-efficient washing filter plate and its diafiltration mode - Google Patents
High-efficient washing filter plate and its diafiltration mode Download PDFInfo
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- CN110180230A CN110180230A CN201910526050.6A CN201910526050A CN110180230A CN 110180230 A CN110180230 A CN 110180230A CN 201910526050 A CN201910526050 A CN 201910526050A CN 110180230 A CN110180230 A CN 110180230A
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- Prior art keywords
- washing
- filter plate
- board
- filter
- double
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- 238000005406 washing Methods 0.000 title claims abstract description 118
- 238000011026 diafiltration Methods 0.000 title claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000000706 filtrate Substances 0.000 claims description 25
- 239000012065 filter cake Substances 0.000 claims description 19
- 239000004744 fabric Substances 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000011085 pressure filtration Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000012452 mother liquor Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
- B01D25/282—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying
- B01D25/284—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying by gases or by heating
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a kind of high-efficient washing filter plate and its diafiltration mode, belong to the pressure filtration facility in separation of solid and liquid process and technology field.A kind of high-efficient washing filter plate is formed by board-washing (mainboard) and blind plate (subplate) each semigamy, is commonly called as " blind to wash fifty-fifty filter plate "；It is characterized in that, the lower two corners double blind hole of existing board-washing and blind plate is modified to through-hole, it is that light and shade double fluid (the double free flow+board-washing quadrangle undercurrents of blind plate) goes out liquid form by the bright efflux form innovations of existing board-washing pair, to have both the function of double-current, the bidirectional crossed washing of diafiltration one, light and shade.A kind of diafiltration mode of high-efficient washing filter plate, using high-efficient washing filter plate of the invention, mode of washing is bidirectional crossed washing, and liquid mode is innovated as efficient light and shade double fluid form out.Pioneering light and shade double fluid washing filter plate and its diafiltration mode, have the advantages that liquid speed degree is fast out, feed time is short, diafiltration is high-efficient, had not only improved diafiltration efficiency, but also tamped filter press automation foundation.
Description
Technical field
The invention belongs in separation of solid and liquid process pressure filtration facility and technology field, be related to a kind of washing and filter pressing
Machine and its diafiltration mode.
Background technique
Filter press is a kind of pressure filtration facility of general intermittent operation, and washing press is a kind of diafiltration integration
Filter press, the separation of solid and liquid suitable for various suspension.Washing press mainly by rack and hold-down mechanism, diafiltration mechanism,
The part such as drawing-plate mechanism, hydraulic drive mechanism, electric control system forms, and workflow is, dehvery pump is by solidliquid mixture
Material is delivered in each filter chamber from feed opening, carries out low pressure static filtering；Particle in filter cloth retention material forms filter in filter chamber
Cake；Cleaning solution is intersected injection filter cake from two corners washing hole by water pump, carries out two-way formula washing of eliminating illiteracy to filter cake, filtrate passes through filter cloth
It is flowed out from double free flow fluid holes；It is passed through compressed air by high-pressure medium hole, passage of air dries up remaining in filter cake particle seam
Cleaning solution, while realizing anhydrous filter cloth regeneration；Filter plate pulls open automatically, realizes gravity cake discharge, and intermittent reciprocation cycle work is realized
Batch is separated by solid-liquid separation.
Washing filter plate is the core composition element of washing press, and usually washing filter plate is by board-washing (mainboard) and blind plate
(subplate in lower two corners double blind hole) each semigamy forms, and is commonly called as " blind to wash fifty-fifty filter plate ", and blind in cooperation is washed among fifty-fifty filter plate
Filter cloth is installed and constitutes diafiltration mechanism, arrangement is mounted on filter press crossbeam.The purpose of Washing of Filter Cake is to remove in filter cake
The valuable mother liquor being detained in soluble impurity, or recycling filter cake.Mode of washing has: free flow unidirectionally washs and two-way washing,
Undercurrent unidirectionally washs and two-way washing, adapts to different materials respectively.
The blind of existing washing press washes fifty-fifty washing filter plate, has the following deficiencies: that the lower two corners of board-washing and blind plate are double
Blind hole, the lower two corners of board-washing are double free flow holes, and double bright efflux forms, liquid speed degree is slow out, feed time is long, and production efficiency is low,
Free flow water nozzle must be turned off manually before especially washing, water nozzle, which is not closed completely, causes water clock, and manual operation influences filter press automation
It is horizontal.
Summary of the invention
The purpose of the present invention is overcoming the existing blind defect for washing fifty-fifty washing filter plate, corresponding technical problem is solved, is provided
A kind of efficient combination washing filter plate and its diafiltration mode.
The present invention solve prior art problem used by technical solution be: a kind of high-efficient washing filter plate, it is blind wash it is fifty-fifty, it is simultaneous
Standby diafiltration one, light and shade double-current (the double free flow+board-washing quadrangle undercurrents of blind plate), the function of two-way washing, by the board-washing of innovative design
Cooperate with blind plate, and add two valves, control cleaning solution is flowed out from the free flow water nozzle of blind plate；It is characterized in that, will show
The lower two corners double blind hole of some board-washings and blind plate is modified to through-hole, is that light and shade is double by the double bright efflux form innovations of existing board-washing
Efflux form accelerates liquid speed degree, shortening feed time, raising production efficiency out.
Further, the board-washing has washing function, is mainly provided with out liquid busway, filtrate effluent hole, filter
Plate sealing edge, filter plate feed opening, filter plate supporting point, filter plates face, four corner apertures of filter plate, filter plate silk plug;It is characterized in that, will show
There is the lower two corners double blind hole of board-washing to be modified to undercurrent through-hole；Filter plate silk plug changes into four for blocking the double free flow fluid holes of board-washing
Angle undercurrent form, avoid washing before free flow water nozzle must be turned off manually, simplify manual operation be conducive to improve filter press it is automatic
Change horizontal.
Further, the blind plate has liquid function out, without washing function, is mainly provided with free flow water nozzle, goes out liquid
Busway, filtrate effluent hole, filter plate sealing edge, filter plate feed opening, filter plate supporting point, filter plates face, four corner apertures of filter plate;Its
It is characterized in that, free flow through-hole in pairs is improved into the lower two corners double blind hole of existing blind plate.
The present invention also provides a kind of diafiltration modes of high-efficient washing filter plate, are constituted using high-efficient washing filter plate of the invention
Diafiltration integrated mechanism, diafiltration mechanism is mainly by board-washing, blind plate, the end to end groups such as anticorrosive board, filter cloth, Open valve, closing valve
At；Mode of washing is bidirectional crossed washing, and liquid mode is innovated as efficient light and shade double fluid form out；When feeding (static filtering),
Valve is all turned on, and free flow and the double effluxes of undercurrent light and shade, filtrate pass through board-washing quadrangle undercurrent hole and the double free flow water nozzle streams of blind plate
Out；When washing, two corners hole valve in board-washing is first opened, lower two corners hole valve is closed, avoids water flow short circuit, cleaning solution is direct
Outflow；Water pump crosss into cleaning solution from upper two corner apertures of thrust plate, flows through two corner apertures on blind plate, is gone out by the filtrate of board-washing
Water hole penetrates entire filter cake, carries out two-way formula washing of eliminating illiteracy to filter cake, then from lower double free flow water nozzle outflows of blind plate, effectively mention
High material diafiltration effect and filter press production efficiency.
A kind of high-efficient washing filter plate provided by the invention and its diafiltration mode, pioneering diafiltration one, two-way are washed light and shade double fluid
It washs, has the advantages that liquid speed degree is fast out, feed time is short, diafiltration is high-efficient, not only improved diafiltration efficiency, but also tamped filter press
Automation foundation.
Detailed description of the invention
Fig. 1 is the board-washing structural schematic diagram of high-efficient washing filter plate of the invention.
Fig. 2 is the blind plate structure schematic diagram of high-efficient washing filter plate of the invention.
Fig. 3 is mode of washing (process flow) schematic diagram of high-efficient washing filter plate of the invention.
Appended drawing reference: 1- free flow water nozzle, 2- go out liquid busway, 3- filtrate effluent hole, 4- filter plate sealing edge, 5- filter plate into
Material hole, 6- filter plate supporting point, 7- filter plates face, four corner apertures of 8- filter plate, 9- filter plate silk plug, 11- Open valve, 12- blind plate,
13- board-washing, anticorrosive board, 15- close valve, 16- filter cloth to 14- end to end.
Specific embodiment
Below with reference to the attached drawing in high-efficient washing filter plate of the invention and its diafiltration mode embodiment, to the embodiment of the present invention
In technical solution be described, described embodiment is only currently preferred a part of the embodiment, rather than whole
Embodiment.Based on the embodiment of the present invention, what those skilled in the art made does not have creative every other embodiment, such as bright
Dark double efflux modes are identical, the blind of the unparalleled free flow fluid hole of board-washing (i.e. therefore filter plate silk plug is cancelled) washes fifty-fifty filter plate, all belong to
In protection scope of the present invention.
Embodiment 1
A kind of high-efficient washing filter plate is washed each semigamy and is formed by the board-washing 13 and blind plate 12 of innovative design are blind, be commonly called as it is blind wash it is fifty-fifty
Filter plate, filter plate shape are square plate, as needed can also be rectangular slab, have both the function of double-current, the two-way washing of diafiltration one, light and shade
Energy.The board-washing 13 has washing function, is mainly provided with out liquid busway 2, filtrate effluent hole 3, filter plate sealing edge 4, filter
Plate feed opening 5, filter plate supporting point 6, filter plates face 7, four corner apertures 8 of filter plate, filter plate silk plug 9;It is characterized in that, by existing board-washing
Lower two corners double blind hole be modified to undercurrent through-hole；Filter plate silk plug 9 changes into quadrangle undercurrent for blocking the double free flow fluid holes of board-washing
Free flow water nozzle must be turned off manually before avoiding washing in form, simplify manual operation and be conducive to improve filter press automatization level.
The blind plate 12, has liquid function out, without washing function, be mainly provided with free flow water nozzle 1, go out liquid busway 2, filtrate goes out
Water hole 3, filter plate sealing edge 4, filter plate feed opening 5, filter plate supporting point 6, filter plates face 7, four corner apertures 8 of filter plate;It is characterized in that,
Free flow through-hole in pairs is improved into the lower two corners double blind hole of existing blind plate 12.
Described blind to wash the effect that fifty-fifty filter plate is respectively arranged and be: the double free flow water nozzles 1 of the lower two corners of blind plate are used as bright efflux, out
Liquid busway 2 is used as connection free flow water nozzle 1 and filtrate effluent hole 3 and converges filtrate, and filtrate effluent hole 3, which is used as, imports filtrate
Liquid busway 2, filter plate sealing edge 4 is used as sealing filter chamber, and (blind wash among fifty-fifty filter plate is equipped with filter cloth, and filter cloth periphery is sealing
Part), middle part filter plate feed opening 5 is used as material inlet port, and truncated cone-shaped filter plate supporting point 6 is used as supporting filter cloth and transmits pressure, blind
Net formula filter plates face 7, which is used as, to be increased filter cake frictional force and forms sepage water conservancy diversion network, and four corner apertures 8 of filter plate enters as cleaning solution
(when charging, filtrate flows to the dark efflux of four corner apertures 8 of board-washing 13 by upper two corner apertures 8 of blind plate 12 for mouth and filtrate (liquid；Washing
Or when drying, the valve of lower two corner apertures 8 of board-washing 13 is closed, and upper two corner apertures 8 of board-washing 13 is washed into cleaning solution or compressed air
When, cleaning solution, which has to pass through two corner apertures 8 on blind plate 12, just can guarantee that cleaning solution is passed between each board-washing 13), filter plate
Silk plug 9, which is used as, blocks the double free flow fluid holes of board-washing, changes into quadrangle undercurrent form.It adds Open valve 11, close valve 15, head
Filter cloth 16 is installed among tail anticorrosive board 14, board-washing 13 and blind plate 12, constitutes the diafiltration mechanism of diafiltration one, arrangement is mounted on pressure
On filter crossbeam, have the advantages that liquid speed degree is fast out, feed time is short, diafiltration is high-efficient.
Embodiment 2
A kind of diafiltration mode of high-efficient washing filter plate, the diafiltration integrated mechanism constituted using high-efficient washing filter plate of the invention,
Diafiltration mechanism mainly by Open valve 11, blind plate 12, board-washing 13, end to end anticorrosive board 14, close valve 15, filter cloth 16 etc. forms；
Mode of washing is bidirectional crossed washing, and liquid mode is innovated as the double efflux forms of efficient light and shade out, in conjunction with 3 high-efficient washing of attached drawing
Mode of washing (process flow) schematic diagram of filter plate is described.
When feeding (static filtering), all valves 11 are switched on, free flow and the double effluxes of undercurrent light and shade, the height of feed opening 5
Press pump squeezes into slurry, carries out low pressure static filtering, and the particle that filter cloth 16 retains in material forms filter cake in filter chamber；Filtrate is passed through
Filtrate effluent hole 3 converges to liquid outlet channel 2, then goes out liquid from four corner apertures 8 in board-washing 13, can also be from 12 filtrate effluent hole of blind plate
3 converge to liquid outlet channel 2, then go out liquid from double free flow water nozzles 1, and liquid can more accelerate filtrate and go out liquid out than simple double frees flow 1 in this way
Speed effectively improves material filtering efficiency so as to shorten filter press filtration time.
When washing, two corners hole valve 11 in board-washing 13 is first opened, lower two corners hole valve 15 is closed, it is short to avoid water flow
Road, cleaning solution flow directly out；Cleaning solution is crossed into from upper two corner apertures 8 of board-washing 13, liquid outlet channel 2 is flowed through, from filtrate effluent
Hole 3 is flowed out, and filter cloth 16 and filter cake are penetrated, and is carried out two-way formula washing of eliminating illiteracy to filter cake, is efficiently removed the soluble impurity in filter cake,
Or the valuable mother liquor being detained in recycling filter cake, filtrate flow through blind plate 12 and flow out from double free flow water nozzles 1, substitute artificial hand completely
Free flow water nozzle 1 is closed in dynamic operation, is eliminated filtrate water clock when closing water nozzle, is effectively improved material washing effect.
When drying, compressed air is passed through by high-pressure medium hole (upper two corner apertures 8 of board-washing 13), passage of air dries up filter cake
Remaining cleaning solution in particle seam, bottoms out filter cake moisture content, improves the degree of purity of filter cake and the rate of recovery of mother liquor, together
The anhydrous filter cloth 16 of Shi Shixian regenerates.
High-efficient washing filter plate and its diafiltration mode of the invention, had not only improved diafiltration efficiency, but also to have tamped filter press automatic
Change basis, by PLC+ touch display screen intelligent control, single work cycle is (from compressing filter plate, feed, squeezing, wash, blow
Dry, pulling plate, discharging) key is automatically performed, improve filter press production efficiency.
Claims (3)
1. a kind of high-efficient washing filter plate is formed by board-washing (mainboard) and blind plate (subplate) each semigamy, is commonly called as " blind to wash fifty-fifty filter
Plate "；Board-washing is mainly provided with: go out liquid busway, filtrate effluent hole, filter plate sealing edge, filter plate feed opening, filter plate supporting point,
Filter plates face, four corner apertures of filter plate, filter plate silk plug etc.；Blind plate is mainly provided with: free flow water nozzle, liquid busway, filtrate go out out
Water hole, filter plate sealing edge, filter plate feed opening, filter plate supporting point, filter plates face, four corner apertures of filter plate；It is characterized in that, by existing
Board-washing and the lower two corners double blind hole of blind plate be modified to through-hole, be light and shade double fluid by the double bright efflux form innovations of existing board-washing
(the double free flow+board-washing quadrangle undercurrents of blind plate) go out liquid form；To have both the function of double-current, the two-way washing of diafiltration one, light and shade, because
This accelerates out liquid speed degree, shortens feed time, improves diafiltration efficiency.
2. high-efficient washing filter plate according to claim 1, which is characterized in that the lower two corners double blind hole of board-washing is modified to undercurrent
While through-hole, the double free flow fluid holes of board-washing are blocked with filter plate silk plug, take quadrangle undercurrent form, avoid the preceding palpus of washing manually
Free flow water nozzle is closed, manual operation is simplified, is conducive to improve filter press automatization level.
3. a kind of diafiltration mode of high-efficient washing filter plate, the diafiltration integral machine constituted using high-efficient washing filter plate of the invention
Structure, diafiltration mechanism are mainly made of anticorrosive board end to end, board-washing, blind plate, filter cloth, Open valve, closing valve etc.；Mode of washing is
Bidirectional crossed washing, liquid mode is innovated as efficient light and shade double fluid form out；When feeding (static filtering), valve is all turned on,
Free flow and the double effluxes of undercurrent light and shade, filtrate pass through board-washing quadrangle undercurrent hole and the double free flow water nozzle outflows of blind plate；When washing, first open
Two corners hole valve in board-washing is opened, lower two corners hole valve is closed, avoids water flow short circuit, cleaning solution flows directly out；Water pump will be washed
It washs liquid to cross into from upper two corner apertures of thrust plate, flows through two corner apertures on blind plate, by the filtrate effluent hole of board-washing, penetrate entire
Filter cake carries out two-way formula washing of eliminating illiteracy to filter cake, then from lower double free flow water nozzle outflows of blind plate, effectively improves material diafiltration effect
With filter press production efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910526050.6A CN110180230A (en) | 2019-06-18 | 2019-06-18 | High-efficient washing filter plate and its diafiltration mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910526050.6A CN110180230A (en) | 2019-06-18 | 2019-06-18 | High-efficient washing filter plate and its diafiltration mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110180230A true CN110180230A (en) | 2019-08-30 |
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ID=67722273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910526050.6A Pending CN110180230A (en) | 2019-06-18 | 2019-06-18 | High-efficient washing filter plate and its diafiltration mode |
Country Status (1)
| Country | Link |
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| CN (1) | CN110180230A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114949947A (en) * | 2022-06-20 | 2022-08-30 | 景津装备股份有限公司 | Blowing mode for automatic cake unloading of filter press |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101406772A (en) * | 2008-09-16 | 2009-04-15 | 上海第二工业大学 | Multifunctional equipment for separating liquid from solid and method thereof |
| CN202700169U (en) * | 2012-08-31 | 2013-01-30 | 福建省固体废物处置有限公司 | Improved filter press |
| CN205461197U (en) * | 2016-02-18 | 2016-08-17 | 景津环保股份有限公司 | Rectangle van -type filter plate |
| CN210384977U (en) * | 2019-06-18 | 2020-04-24 | 景津环保股份有限公司 | High-efficiency washing filter plate and filtering and washing mode thereof |
-
2019
- 2019-06-18 CN CN201910526050.6A patent/CN110180230A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101406772A (en) * | 2008-09-16 | 2009-04-15 | 上海第二工业大学 | Multifunctional equipment for separating liquid from solid and method thereof |
| CN202700169U (en) * | 2012-08-31 | 2013-01-30 | 福建省固体废物处置有限公司 | Improved filter press |
| CN205461197U (en) * | 2016-02-18 | 2016-08-17 | 景津环保股份有限公司 | Rectangle van -type filter plate |
| CN210384977U (en) * | 2019-06-18 | 2020-04-24 | 景津环保股份有限公司 | High-efficiency washing filter plate and filtering and washing mode thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114949947A (en) * | 2022-06-20 | 2022-08-30 | 景津装备股份有限公司 | Blowing mode for automatic cake unloading of filter press |
| CN114949947B (en) * | 2022-06-20 | 2024-04-16 | 景津装备股份有限公司 | Automatic cake discharging blowing mode of filter press |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 253000 Shandong city in Dezhou Province Economic Development Zone, the first northbound Regent Applicant after: Jingjin Equipment Co.,Ltd. Address before: 253000 Shandong city in Dezhou Province Economic Development Zone, the first northbound Regent Applicant before: Jing Jin Environmental Protection Inc. |
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| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190830 |
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| RJ01 | Rejection of invention patent application after publication |