CN112538776B - Pulping and filtering device of papermaking machine - Google Patents
Pulping and filtering device of papermaking machine Download PDFInfo
- Publication number
- CN112538776B CN112538776B CN202011380481.5A CN202011380481A CN112538776B CN 112538776 B CN112538776 B CN 112538776B CN 202011380481 A CN202011380481 A CN 202011380481A CN 112538776 B CN112538776 B CN 112538776B
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- CN
- China
- Prior art keywords
- fixedly connected
- stirring
- box body
- box
- pulping
- 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.)
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Links
- 238000001914 filtration Methods 0.000 title claims abstract description 32
- 238000004537 pulping Methods 0.000 title claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 96
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 24
- 238000007790 scraping Methods 0.000 claims description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 20
- 238000000034 method Methods 0.000 description 11
- 238000011084 recovery Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
- D21D5/04—Flat screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The invention discloses a pulping and filtering device of a papermaking machine, wherein a feed hopper is communicated with a box body and is positioned above the box body, a connecting pipe is communicated with the box body and is positioned below the box body, a filter plate is fixedly connected with the box body and is positioned at the joint of the box body and the connecting pipe, a first rotating motor is fixedly connected with the box body and is positioned on the outer side wall of the box body, a first speed reducer is rotationally connected with the output end of the first rotating motor, one end of a rotating column is fixedly connected with the first speed reducer, a plurality of staggered stirring plates are arranged on the outer side wall of the rotating column, one end of the connecting pipe, which is far away from the box body, is communicated with a stirring processing box, and a nozzle is communicated with the stirring processing box.
Description
Technical Field
The invention relates to the technical field of pulp filtration, in particular to a pulping and filtering device of papermaking machinery.
Background
Papermaking is an important invention of ancient Chinese labor people and is divided into a mechanism form and a manual form. The mechanism is that pulp suitable for paper quality is diluted with water to a certain concentration, and the pulp is primarily dewatered in the wire part of the paper machine to form wet paper sheets, and the wet paper sheets are squeezed, dewatered and dried to form paper.
When mechanical pulping, impurities in the pulp need to be filtered, but the pulp often adheres to the filter plates, and technicians cannot process the pulp adhered to the filter plates.
Disclosure of Invention
The invention aims to provide a pulping and filtering device of a papermaking machine, and aims to solve the technical problem that paper pulp in the prior art is often adhered to a filter plate, and a technician cannot process the paper pulp adhered to the filter plate.
In order to achieve the above purpose, the pulping and filtering device of the papermaking machine comprises a box body, a feed hopper, a filter plate, a connecting pipe, a first rotating motor, a first speed reducer, a rotating column, a stirring plate, a stirring processing box and a nozzle, wherein the feed hopper is communicated with the box body and is positioned above the box body, the connecting pipe is communicated with the box body and is positioned below the box body, the filter plate is fixedly connected with the box body and is positioned at the joint of the box body and the connecting pipe, the first rotating motor is fixedly connected with the box body and is positioned on the outer side wall of the box body, the output end of the first rotating motor penetrates through the outer side wall of the box body, the first speed reducer is rotationally connected with the output end of the first rotating motor, one end of the rotating column is fixedly connected with the first speed reducer, a plurality of staggered stirring plates are arranged on the outer side wall of the rotating column, and one end far away from the box body is communicated with the stirring plate and the stirring box is communicated with the stirring box.
The pulping and filtering device of the papermaking machine further comprises an air cylinder, a bent rod and a pushing column, wherein the air cylinder is fixedly connected with the stirring processing box and is positioned on the outer side wall of the stirring processing box, the output end of the air cylinder penetrates through the outer side wall of the stirring processing box, one end of the bent rod is fixedly connected with the output end of the air cylinder, and the other end of the bent rod is fixedly connected with the pushing column.
The pulping and filtering device of the papermaking machine further comprises a base, a fixing plate, a placing plate and a supporting rod, wherein the supporting rod is fixedly connected with the base and is located above the base, the box body is fixedly connected with the supporting rod, the base is fixedly connected with the stirring processing box and is located below the stirring processing box, the fixing plate is fixedly connected with the base, and the placing plate is slidably connected with the fixing plate and is located above the fixing plate.
The pulping and filtering device of the papermaking machine further comprises an observation plate, wherein the stirring processing box is provided with a groove, and the observation plate is fixedly connected with the stirring processing box and is positioned in the groove.
The pulping and filtering device of the papermaking machine further comprises a rotating assembly and a stirring rod, wherein the rotating assembly is fixedly connected with the stirring processing box, and one end of the stirring rod is fixedly connected with the rotating assembly.
The stirring processing box comprises a stirring processing box body, a stirring rod, a stirring assembly and a stirring assembly, wherein the stirring assembly comprises a second rotating motor and a second speed reducer, the second rotating motor is fixedly connected with the stirring processing box body and is positioned on the outer side wall of the stirring processing box body, the output end of the second rotating motor penetrates through the outer side wall of the stirring processing box body, the second speed reducer is rotationally connected with the output end of the second rotating motor, and one end of the stirring rod is fixedly connected with the second speed reducer.
The beneficial effects of the invention are as follows: the technical staff is used for pouring unfiltered paper pulp into the box body from the feed hopper, the small holes in the filter plate are used for filtering impurities in the paper pulp, the technical staff starts the first rotating motor to operate, the first rotating motor is matched with the first speed reducer to drive the rotating column to rotate, so that the stirring plates are in staggered contact with the filter plate, in the contact process, the stirring plates are used for stirring paper pulp piled on the filter plate, the paper pulp is prevented from being piled on the filter plate to affect the filtering progress, the paper pulp passes through the filter plate and is dripped into the stirring processing box for stirring processing procedures, the paper pulp quality is ensured, the quality problem is solved after the paper is formed, the paper pulp can flow out from the nozzle after the stirring processing procedures are finished, the next step of work is carried out, and the paper pulp adhered on the filter plate is conveniently processed by the technical staff.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a pulping and filtering device of a papermaking machine of the present invention.
FIG. 2 is an enlarged view of the part of the structure at B of FIG. 1 according to the present invention
FIG. 3 is a schematic view of the structure of the stirring processing box of the present invention
FIG. 4 is a schematic view of the structure of the fixing plate and the placing plate of the present invention
100-papermaking machinery pulping and filtering device, 1-box, 2-feeder hopper, 3-filter plate, 4-connecting pipe, 5-first rotating motor, 6-first speed reducer, 7-rotating column, 8-stirring plate, 9-stirring processing box, 10-nozzle, 11-cylinder, 12-bent rod, 13-pushing column, 14-base, 15-fixed plate, 16-placing plate, 17-supporting rod, 18-observing plate, 19-rotating component, 20-stirring rod, 21-electric screw rod, 22-sleeve, 23-scraper blade, 24-recycling box, 25-second rotating motor, 26-second speed reducer and 27-groove.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, in the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 4, the present invention provides a pulping and filtering device 100 for a papermaking machine, comprising a box 1, a feed hopper 2, a filter plate 3, a connecting pipe 4, a first rotating motor 5, a first speed reducer 6, a rotating column 7, a stirring plate 8, a stirring processing box 9 and a nozzle 10, wherein the feed hopper 2 is communicated with the box 1 and is located above the box 1, the connecting pipe 4 is communicated with the box 1 and is located below the box 1, the filter plate 3 is fixedly connected with the box 1 and is located at the joint of the box 1 and the connecting pipe 4, the first rotating motor 5 is fixedly connected with the box 1 and is located on the outer side wall of the box 1, the output end of the first rotating motor 5 penetrates through the outer side wall of the box 1, the first speed reducer 6 is rotationally connected with the output end of the first rotating motor 5, one end of the rotating column 7 is fixedly connected with the box 1, the plurality of stirring plates 7 are arranged at the positions far from the stirring plate 8 and are far away from the stirring box 9, and the stirring box 9 is communicated with one end of the stirring box 4.
In this embodiment, the technician will not filter paper pulp follow feeder hopper 2 empty to in the box 1, the aperture on the filter 3 filters the impurity in the paper pulp, and the technician starts first rotating electric machine 5 operation, first rotating electric machine 5 with first speed reducer 6 cooperation drives the rotation post 7 rotates, makes a plurality of stir plate 8 with filter 3 staggered contact, in the in-process of contact, stir plate 8 stir the paper pulp of piling up on the filter 3, avoid paper pulp to pile up in filter 3 department, influence the filtration progress, paper pulp passes through filter 3, drips into stirring processing box 9 carries out stirring processing procedure, guarantees paper pulp quality, avoids the shaping of paper after the quality problem appears, and the technician can be after stirring processing procedure is accomplished, with paper pulp follow nozzle 10 flows, carries out next step work, has realized being convenient for the technician to handle paper pulp of adhesion in filter 3 department.
Further, the papermaking machine pulping and filtering device 100 further comprises an air cylinder 11, a bent rod 12 and a pushing column 13, wherein the air cylinder 11 is fixedly connected with the stirring processing box 9 and is located on the outer side wall of the stirring processing box 9, the output end of the air cylinder 11 penetrates through the outer side wall of the stirring processing box 9, one end of the bent rod 12 is fixedly connected with the output end of the air cylinder 11, and the other end of the bent rod 12 is fixedly connected with the pushing column 13.
In this embodiment, the pushing post 13 may be engaged with the nozzle 10, when the pulp is stirred in the stirring processing box 9, the pushing post 13 blocks the nozzle 10 from flowing out of the nozzle 10, after the stirring processing is completed, a technician controls the cylinder 11, and the cylinder 11 drives the bent rod 12 to move, so as to drive the pushing post 13 to leave the nozzle 10, and at this time, the pulp may flow out of the nozzle 10; when the pulp is not required to flow out, the air cylinder 11 is controlled, and the air cylinder 11 drives the bent rod 12 to move, so that the pushing column 13 is driven to block the nozzle 10.
Further, the pulping and filtering device 100 of the papermaking machine further comprises a base 14, a fixing plate 15, a placing plate 16 and a supporting rod 17, wherein the supporting rod 17 is fixedly connected with the base 14 and is located above the base 14, the box 1 is fixedly connected with the supporting rod 17, the base 14 is fixedly connected with the stirring processing box 9 and is located below the stirring processing box 9, the fixing plate 15 is fixedly connected with the base 14, and the placing plate 16 is slidably connected with the fixing plate 15 and is located above the fixing plate 15.
In this embodiment, the base 14 and the supporting rod 17 play a supporting role, a technician may perform a paper forming process on the placement plate 16, after pulp flows from the nozzle 10 onto the placement plate 16, the cylinder 11 is controlled, the cylinder 11 drives the bent rod 12 to move, so as to drive the pushing column 13 to block the nozzle 10, and slide the placement plate 16, so that the placement plate 16 deviates from a position right below the nozzle 10, and the technician may perform a further process on the pulp in the placement plate 16.
Further, the papermaking machine pulping and filtering device 100 further comprises an observation plate 18, the stirring processing box 9 is provided with a groove 27, and the observation plate 18 is fixedly connected with the stirring processing box 9 and is positioned in the groove 27.
In this embodiment, the observation plate 18 is made of transparent material, so that a technician can observe the stirring condition of the pulp and the volume of the filtered pulp in the stirring processing box 9 through the observation plate 18, thereby facilitating the technician to reasonably arrange the working time.
Further, the pulping and filtering device 100 of the papermaking machine further comprises a rotating assembly 19 and a stirring rod 20, wherein the rotating assembly 19 is fixedly connected with the stirring processing box 9, and one end of the stirring rod 20 is fixedly connected with the rotating assembly 19.
In this embodiment, the technician starts the operation of rotating assembly 19, rotating assembly 19 drives stirring rod 20 rotates, stirring rod 20 carries out even stirring to the paper pulp, avoids paper pulp quality inhomogeneous, influences the fashioned quality of paper.
Further, the rotating assembly 19 includes a second rotating motor 25 and a second speed reducer 26, the second rotating motor 25 is fixedly connected with the stirring processing box 9 and is located on the outer side wall of the stirring processing box 9, the output end of the second rotating motor 25 penetrates through the outer side wall of the stirring processing box 9, the second speed reducer 26 is rotatably connected with the output end of the second rotating motor 25, and one end of the stirring rod 20 is fixedly connected with the second speed reducer 26.
In this embodiment, the technician starts the operation of the second rotation motor 25, the second rotation motor 25 cooperates with the second speed reducer 26 to drive the stirring rod 20 to rotate, and the stirring rod 20 uniformly stirs the pulp, so as to avoid uneven pulp quality and influence on the quality of paper molding.
Further, the papermaking machine pulping and filtering device 100 further comprises an electric screw rod 21, a sleeve 22 and a scraping plate 23, wherein the electric screw rod 21 is fixedly connected with the fixing plate 15 and is positioned on the outer side wall of the fixing plate 15, the output end of the electric screw rod 21 penetrates through the outer side wall of the fixing plate 15, the sleeve 22 is sleeved on the output end of the electric screw rod 21, and one end of the scraping plate 23 is fixedly connected with the sleeve 22.
In this embodiment, after the pulp flows into the placement plate 16 from the nozzle 10, a technician controls the electric screw 21 to operate, so as to drive the sleeve 22 to move horizontally, the scraper 23 contacts with the highest point of the placement plate 16, and when the sleeve 22 moves horizontally, the scraper 23 scrapes off the excessive pulp in the placement plate 16, so that the surface of the pulp in the placement plate 16 is smoother.
Further, the papermaking machine pulping and filtering device 100 further comprises a recovery box 24, and the recovery box 24 is detachably connected with the fixing plate 15 and is located on the outer side wall of the fixing plate 15.
In this embodiment, the scraper 23 scrapes the surplus pulp in the placement plate 16 off to the recovery box 24 and takes the pulp down, and when the pulp in the recovery box 24 accumulates a certain volume, a technician takes down the recovery box 24 and repeatedly filters the pulp in the recovery box 24, thereby avoiding waste.
The above disclosure is only a preferred embodiment of the present invention, and it should be understood that the scope of the invention is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present invention.
Claims (4)
1. A pulping and filtering device of a papermaking machine is characterized in that,
the stirring treatment box comprises a box body, a feed hopper, a filter plate, a connecting pipe, a first rotating motor, a first speed reducer, a rotating column, a stirring plate, a stirring treatment box and a nozzle, wherein the feed hopper is communicated with the box body and is positioned above the box body, the connecting pipe is communicated with the box body and is positioned below the box body, the filter plate is fixedly connected with the box body and is positioned at the joint of the box body and the connecting pipe, the first rotating motor is fixedly connected with the box body and is positioned on the outer side wall of the box body, the output end of the first rotating motor penetrates through the outer side wall of the box body, the first speed reducer is rotationally connected with the output end of the first rotating motor, one end of the rotating column is fixedly connected with the first speed reducer, a plurality of staggered stirring plates are arranged on the outer side wall of the rotating column, one end of the connecting pipe far away from the box body is communicated with the stirring treatment box, and the nozzle is communicated with the stirring treatment box;
the pulping and filtering device of the papermaking machine further comprises an air cylinder, a bent rod and a pushing column, wherein the air cylinder is fixedly connected with the stirring processing box and is positioned on the outer side wall of the stirring processing box, the output end of the air cylinder penetrates through the outer side wall of the stirring processing box, one end of the bent rod is fixedly connected with the output end of the air cylinder, and the other end of the bent rod is fixedly connected with the pushing column;
the pulping and filtering device of the papermaking machine further comprises a base, a fixed plate, a placing plate and a supporting rod, wherein the supporting rod is fixedly connected with the base and is positioned above the base, the box body is fixedly connected with the supporting rod, the base is fixedly connected with the stirring processing box and is positioned below the stirring processing box, the fixed plate is fixedly connected with the base, and the placing plate is slidably connected with the fixed plate and is positioned above the fixed plate;
the pulping and filtering device of the papermaking machine further comprises an electric screw rod, a sleeve and a scraping plate, wherein the electric screw rod is fixedly connected with the fixing plate and is positioned on the outer side wall of the fixing plate, the output end of the electric screw rod penetrates through the outer side wall of the fixing plate, the sleeve is sleeved on the output end of the electric screw rod, and one end of the scraping plate is fixedly connected with the sleeve.
2. A pulping and filtering device of a papermaking machine according to claim 1,
the pulping and filtering device of the papermaking machine further comprises an observation plate, wherein the stirring processing box is provided with a groove, and the observation plate is fixedly connected with the stirring processing box and is positioned in the groove.
3. A pulping and filtering device of a papermaking machine according to claim 2,
the pulping and filtering device of the papermaking machine further comprises a rotating assembly and a stirring rod, wherein the rotating assembly is fixedly connected with the stirring processing box, and one end of the stirring rod is fixedly connected with the rotating assembly.
4. A pulping and filtering device of a papermaking machine according to claim 3,
the rotating assembly comprises a second rotating motor and a second speed reducer, the second rotating motor is fixedly connected with the stirring processing box and is positioned on the outer side wall of the stirring processing box, the output end of the second rotating motor penetrates through the outer side wall of the stirring processing box, the second speed reducer is rotationally connected with the output end of the second rotating motor, and one end of the stirring rod is fixedly connected with the second speed reducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011380481.5A CN112538776B (en) | 2020-11-30 | 2020-11-30 | Pulping and filtering device of papermaking machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011380481.5A CN112538776B (en) | 2020-11-30 | 2020-11-30 | Pulping and filtering device of papermaking machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112538776A CN112538776A (en) | 2021-03-23 |
| CN112538776B true CN112538776B (en) | 2024-03-22 |
Family
ID=75016721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011380481.5A Active CN112538776B (en) | 2020-11-30 | 2020-11-30 | Pulping and filtering device of papermaking machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112538776B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207919229U (en) * | 2017-12-11 | 2018-09-28 | 崔云飞 | A kind of waste paper is environmental friendly regenerated to use paper pulp filtering equipment |
| WO2019128114A1 (en) * | 2017-12-27 | 2019-07-04 | 中国农业科学院蜜蜂研究所 | Royal jelly filtration apparatus and method |
| CN211752779U (en) * | 2019-11-18 | 2020-10-27 | 南昌航空大学 | Polyether polyol refining device |
| CN211963298U (en) * | 2020-01-13 | 2020-11-20 | 盐城市光华卫星设备有限公司 | Pulping filter of papermaking machinery |
-
2020
- 2020-11-30 CN CN202011380481.5A patent/CN112538776B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207919229U (en) * | 2017-12-11 | 2018-09-28 | 崔云飞 | A kind of waste paper is environmental friendly regenerated to use paper pulp filtering equipment |
| WO2019128114A1 (en) * | 2017-12-27 | 2019-07-04 | 中国农业科学院蜜蜂研究所 | Royal jelly filtration apparatus and method |
| CN211752779U (en) * | 2019-11-18 | 2020-10-27 | 南昌航空大学 | Polyether polyol refining device |
| CN211963298U (en) * | 2020-01-13 | 2020-11-20 | 盐城市光华卫星设备有限公司 | Pulping filter of papermaking machinery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112538776A (en) | 2021-03-23 |
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