CN108252157B - Papermaking wet end retention and filtration aid system - Google Patents
Papermaking wet end retention and filtration aid system Download PDFInfo
- Publication number
- CN108252157B CN108252157B CN201711424721.5A CN201711424721A CN108252157B CN 108252157 B CN108252157 B CN 108252157B CN 201711424721 A CN201711424721 A CN 201711424721A CN 108252157 B CN108252157 B CN 108252157B
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- China
- Prior art keywords
- connecting pipe
- retention
- wet end
- communicated
- papermaking
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
The invention relates to a retention and drainage system for a papermaking wet end, which comprises a paper machine, a pressure screen, a fan pump, a first connecting pipe and a second connecting pipe, wherein the fan pump and the pressure screen are communicated through the first connecting pipe, the paper machine and the pressure screen are communicated through the second connecting pipe, polyacrylamide and cationic starch are arranged in the first connecting pipe, bentonite is arranged in the second connecting pipe, the first connecting pipe and the second connecting pipe respectively comprise a pipe body and a feeding device, the feeding device is arranged on the pipe body, the feeding device comprises a connecting part, a cover cap and a conveying device, the connecting part is communicated with a fluid channel of the pipe body, the conveying device is arranged in the fluid channel, and the cover cap is connected with the connecting part. The papermaking wet end retention and drainage system can reduce the loss of fibers, fine fibers and fillers and reduce the impurity content of white water in a screen press part; meanwhile, the retention and filtration aid can be conveniently added into the pipeline, the operation is convenient, and the charging efficiency is higher.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a retention and drainage system for a papermaking wet end.
Background
For the pulping and papermaking industry, the water consumption is large, the environmental pollution caused by waste water discharge is serious, the water saving and emission reduction of the industry are realized, and the maximum economic, social and ecological benefits are obtained with the minimum water resource consumption, so that the problem which needs to be solved in the pulping and papermaking industry is solved. At present, in the papermaking process, the retention and drainage aid can further strengthen the dehydration of a net part and a press part of a paper machine, improve the high-speed shearing resistance of a floccule, obtain higher paper stock retention rate, and make paper sheets have better evenness and air permeability, so the retention and drainage aid is widely applied. However, the existing paper machine discharges white water with high filler content, which causes higher requirements on the treatment process of the white water; in addition, the addition operation of the retention and filtration aid is complicated, and the production efficiency is reduced.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a retention and drainage system for a wet end of papermaking, which can improve retention and drainage of paper stock, reduce impurity content in white water and facilitate addition of retention and drainage aids.
The specific technical scheme is as follows: the utility model provides a papermaking wet end helps and stays system of straining, includes the paper machine, the pressurized screen, the fan pump, first connecting pipe and second connecting pipe, fan pump and pressurized screen pass through first connecting pipe intercommunication, and the paper machine passes through the second connecting pipe intercommunication with the pressurized screen, be equipped with polyacrylamide and cationic starch in the first connecting pipe, be equipped with bentonite in the second connecting pipe, first connecting pipe and second connecting pipe all include body and feed arrangement, and feed arrangement sets up on the body, and feed arrangement includes the interface part, block and conveyor, and the interface part communicates with the fluid passage of body, conveyor sets up in the fluid passage, the block is connected with the interface part.
The following is an attached technical solution of the present invention.
Preferably, the conveying device comprises a spiral piece and a feeding hole, the spiral piece is a hollow blade and is communicated with the feeding hole, and the spiral piece is positioned in the fluid channel.
Preferably, the spiral sheet is provided with holes, and the holes are distributed along the spiral direction of the spiral sheet.
Preferably, the connecting part comprises an opening end, and the feeding port is arranged at the opening end.
Preferably, the outer surface of the opening end is provided with an external thread, the cap is provided with an internal thread, and the cap and the connecting part are connected through the threads.
Preferably, the feeding device is arranged around the axis of the pipe body.
The invention has the technical effects that: the papermaking wet end retention and drainage system can reduce the loss of fibers, fine fibers and fillers and reduce the impurity content of white water in a screen press part; meanwhile, the retention and filtration aid can be conveniently added into the pipeline, the operation is convenient, and the charging efficiency is higher.
Drawings
Fig. 1 is a schematic view of a wet end retention and drainage system for papermaking according to an embodiment of the present invention.
Fig. 2 is a schematic view of a feeding device of an embodiment of the present invention.
FIG. 3 is another schematic view of a feed device according to an embodiment of the present invention.
Detailed Description
The essential features and advantages of the invention will be further explained below with reference to examples, but the invention is not limited to the examples listed.
As shown in fig. 1 to 3, the retention and drainage system for the wet end of papermaking of the present embodiment includes a paper machine 1, a pressure screen 2, a fan pump 3, a first connecting pipe 4 and a second connecting pipe 5, wherein the fan pump 3 and the pressure screen 2 are communicated through the first connecting pipe 4, and the paper machine 1 and the pressure screen 2 are communicated through the second connecting pipe 5; the first connecting pipe 4 is internally provided with polyacrylamide and cationic starch, and the second connecting pipe 5 is internally provided with bentonite; the first and second connection pipes each comprise a pipe body 6 and a feeding device 7, the feeding device 7 being arranged on the pipe body, the feeding device 7 comprising a connecting portion 71, a cap 72 and a transport device 73, the connecting portion being in communication with the fluid channel 61 of the pipe body 6, the transport device 73 being arranged in the fluid channel, the cap being connected to the connecting portion. In the technical scheme, the polyacrylamide is a water-soluble organic high molecular compound, and the main chain of the polyacrylamide has active acylamino and double bonds. By adding polyacrylamide and cationic starch into the first connecting pipe, cationic polyacrylamide is formed, retention rates of fine fibers and fillers can be improved, paper materials are easy to dehydrate, and loss of the fine fibers and the fillers is reduced. The retention aid of the microparticle retention aid system consisting of bentonite and cationic polyacrylamide has the advantages of being basically not influenced by the pH value of the slurry, being more resistant to electrolyte interference and the like. When the polyacrylamide, the cationic starch and the bentonite are added, the cover cap is only required to be taken down, and the material is injected into the conveying device, so that the material enters the first connecting pipe and the second connecting pipe. Above-mentioned technical scheme can be convenient for add the material in first, second connecting pipe to promote reinforced efficiency.
In this embodiment, the feeding device 73 includes a spiral piece 731 which is a hollow blade and a feeding port 732 which is communicated with the spiral piece, and the spiral piece is located in the fluid passage 61. So that the material enters the spiral piece through the feeding hole and enters the fluid channel through the spiral piece to be mixed with the fluid. The flight of this embodiment is hollow blade to can communicate with the feed inlet, make the material get into in the hollow blade.
In this embodiment, the flight is equipped with hole 733, and the hole is laid along the helical direction of flight to make the material spray from a plurality of directions, be favorable to the material dispersion to fuse.
In this embodiment, the interface portion 71 includes an open end 711, and the feeding hole is disposed at the open end, so that the open end can be seen when the cap is opened, thereby facilitating feeding.
In this embodiment, the outer surface of the opening end is provided with an external thread 712, the cap 72 is provided with an internal thread, and the cap and the interface portion are connected by a thread, so as to facilitate the cap to open or close the interface portion.
In this embodiment, feed arrangement 7 encircles the axis setting of body 6 to when the body diameter is great or the reinforced volume is great, can disperse reinforced, raise the efficiency, make the material distribute more evenly in fluid passage.
The papermaking wet end retention and drainage system can reduce the loss of fibers, fine fibers and fillers and reduce the impurity content of white water in a screen press part; meanwhile, the retention and filtration aid can be conveniently added into the pipeline, the operation is convenient, and the charging efficiency is higher.
It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (5)
1. A retention and drainage system for a wet end of papermaking is characterized by comprising a paper machine, a pressure screen, a fan pump, a first connecting pipe and a second connecting pipe, the fan pump is communicated with the pressure screen through a first connecting pipe, the paper machine is communicated with the pressure screen through a second connecting pipe, the first connecting pipe is provided with polyacrylamide and cationic starch, the second connecting pipe is provided with bentonite, the first connecting pipe and the second connecting pipe both comprise a pipe body and a feeding device, the feeding device is arranged on the pipe body, the feeding device comprises a connecting part, a cover cap and a conveying device, the connecting part is communicated with a fluid channel of the pipe body, the conveying device is arranged in the fluid channel, the cap is connected with the connector, the conveying device comprises a spiral piece and a feeding hole, the spiral piece is a hollow blade and is communicated with the feeding hole, and the spiral piece is located in the fluid channel.
2. The papermaking wet end retention and drainage aid system according to claim 1, wherein the spiral sheet is provided with holes arranged in a spiral direction of the spiral sheet.
3. The papermaking wet end retention and drainage aid system according to claim 2, wherein the interface portion includes an open end, the feed inlet being disposed at the open end.
4. The papermaking wet end retention and drainage aid system according to claim 3, wherein the outer surface of the open end is provided with external threads, the cap is provided with internal threads, and the cap and the interface portion are connected by threads.
5. The papermaking wet end retention and drainage system according to claim 4, wherein the feeding device is disposed about an axis of the pipe body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711424721.5A CN108252157B (en) | 2017-12-25 | 2017-12-25 | Papermaking wet end retention and filtration aid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711424721.5A CN108252157B (en) | 2017-12-25 | 2017-12-25 | Papermaking wet end retention and filtration aid system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108252157A CN108252157A (en) | 2018-07-06 |
| CN108252157B true CN108252157B (en) | 2020-10-09 |
Family
ID=62723102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711424721.5A Active CN108252157B (en) | 2017-12-25 | 2017-12-25 | Papermaking wet end retention and filtration aid system |
Country Status (1)
| Country | Link |
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| CN (1) | CN108252157B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE448869T1 (en) * | 2001-02-21 | 2009-12-15 | Metso Paper Inc | ARRANGEMENT FOR MIXING STREAMS IN A PAPER PRODUCTION PROCESS |
| FI116473B (en) * | 2004-07-16 | 2005-11-30 | Wetend Technologies Oy | A method and apparatus for feeding chemicals into a process fluid stream |
| FI20055206A (en) * | 2005-05-02 | 2006-11-03 | Metso Paper Inc | A method for mixing fluid streams with a mixer |
| US7550060B2 (en) * | 2006-01-25 | 2009-06-23 | Nalco Company | Method and arrangement for feeding chemicals into a process stream |
| CN2934320Y (en) * | 2006-05-30 | 2007-08-15 | 衣宁 | Auxiliary agent multi-point adding equipment used in paper making process |
| CN204919218U (en) * | 2015-07-31 | 2015-12-30 | 东莞理文造纸厂有限公司 | Paper grade (stock) ternary helps system of staying |
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2017
- 2017-12-25 CN CN201711424721.5A patent/CN108252157B/en active Active
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| Publication number | Publication date |
|---|---|
| CN108252157A (en) | 2018-07-06 |
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