CN109537348B - Papermaking circulation system and method - Google Patents
Papermaking circulation system and method Download PDFInfo
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- CN109537348B CN109537348B CN201811621527.0A CN201811621527A CN109537348B CN 109537348 B CN109537348 B CN 109537348B CN 201811621527 A CN201811621527 A CN 201811621527A CN 109537348 B CN109537348 B CN 109537348B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
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- 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
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Abstract
The application provides a papermaking circulation system and a papermaking method, wherein the papermaking circulation system comprises a cultural paper papermaking system and a boxboard paper papermaking system, and the cultural paper papermaking system sequentially comprises a first net part, a first press part, a first front drying part, a first sizing part, a first rear drying part and a first calendaring and curling part along the papermaking process direction; the box board paper papermaking system sequentially comprises a pulper, a pulping system, a second net part, a second pressing part, a second front drying part, a second sizing part, a second rear drying part and a second calendaring and curling part along the papermaking flow direction, wherein the papermaking circulating system further comprises a first under-net white water pool arranged at the lower side of the first net part, a first air flotation machine for performing air flotation treatment on the under-net white water in the first under-net white water pool, a first sludge tank for containing sludge discharged by the first air flotation machine and a first plate-and-frame filter press for treating the sludge in the first sludge tank.
Description
Technical Field
The application relates to a papermaking circulation system and a papermaking circulation method.
Background
In the prior art, calcium carbonate is one of important raw materials in the papermaking process, the addition amount of the calcium carbonate can reach 20 percent in cultural paper, but the particle size of the calcium carbonate is small (about 2 microns), the retention rate of the calcium carbonate in a paper machine net part is low, the calcium carbonate and tiny fibers are lost, the calcium carbonate and tiny fibers become main components of net water, the net water recovers the fibers through a plurality of plates of the white water or purifies the white water through air floatation equipment, and the method belongs to short circulation in a workshop and does not consider comprehensive recycling of the calcium carbonate.
Disclosure of Invention
The application aims to provide a papermaking circulation system and a papermaking circulation method.
In order to solve the technical problems, the application provides a papermaking circulation system, which comprises a cultural paper papermaking system and a boxboard papermaking system, wherein the cultural paper papermaking system sequentially comprises a first net part, a first squeezing part, a first front drying part, a first sizing part, a first rear drying part and a first calendaring and curling part along the papermaking process direction; the box board paper papermaking system sequentially comprises a pulper, a pulping system, a second net part, a second pressing part, a second front drying part, a second sizing part, a second rear drying part and a second calendering and curling part along the papermaking process direction, and the papermaking circulating system further comprises a first under-net white water pool, a first air flotation machine, a first sludge tank and a first plate-and-frame filter press, wherein the first under-net white water pool is arranged at the lower side of the first net part, the first air flotation machine is used for carrying out air flotation treatment on the under-net white water in the first under-net white water pool, the first sludge tank is used for containing sludge discharged by the first air flotation machine, and the first plate-and-frame filter press is used for treating the sludge in the first sludge tank; the papermaking circulation system also comprises a second under-net white water tank arranged at the lower side of the second net, a second air floatation machine for carrying out air floatation treatment on the under-net white water in the second under-net white water tank, a second sludge tank for containing sludge discharged by the second air floatation machine, and a second plate-and-frame filter press for treating the sludge in the second sludge tank; the papermaking circulation system also comprises an incinerator, wherein the incinerator is used for incinerating sludge discharged by the first plate-and-frame filter press and the second plate-and-frame filter press, and the incinerator is also used for conveying incinerated objects to the pulper.
Preferably, the pulping system sequentially comprises a deslagging system, a screening system, a purifying system, a heat dispersing system, a pulping system and a pulp tower for storing pulp along the papermaking process direction.
Preferably, a first backflow pipeline is further arranged between the first air flotation machine and the first under-net white water tank, and the first backflow pipeline is used for conveying purified white water in the first air flotation machine to the first under-net white water tank.
Preferably, a second backflow pipeline is further arranged between the second air flotation machine and the second under-net white water tank, and the second backflow pipeline is used for conveying purified white water in the second air flotation machine to the second under-net white water tank.
The application also provides a papermaking circulation method, the method uses the papermaking circulation system, the papermaking circulation method comprises cultural paper papermaking and boxboard paper papermaking, the cultural paper papermaking is that bleached pulp and calcium carbonate are added into a first net part and sequentially pass through a first press part, a first front drying part, a first sizing part, a first rear drying part and a first calendering and curling part to form cultural paper, the calcium carbonate and fiber generated by the first net part enter a first white water tank under the net, the white water in the white water tank under the net is subjected to air floatation treatment by a first air floatation machine, the calcium carbonate, fiber and sticky matters generated in the first air floatation machine are sent into a first sludge tank, the sludge in the first sludge tank enters a first plate-and-frame filter press, the method is characterized in that sludge generated by a first plate-and-frame filter press enters an incinerator for incineration, the boxboard paper is manufactured by adding calcium oxide generated by waste boxboard paper and the incinerator into a pulper, then sequentially passing through a pulping system, a second net part, a second pressing part, a second front drying part, a second sizing part, a second rear drying part and a second calendaring and curling part, calcium carbonate and fibers generated by the second net part enter a second under-net white water tank, the under-net white water in the second under-net white water tank is subjected to air floatation treatment through a second air floatation machine, calcium carbonate, fibers and sticky matters generated by the second air floatation machine are fed into a second sludge tank, sludge in the second sludge tank enters the second plate-and-frame filter press, and sludge generated by the second plate-and-frame filter press enters the incinerator for incineration.
Preferably, the purified white water in the first air flotation machine flows back to the first under-net white water pool through a first return pipeline.
Preferably, the purified white water in the second air flotation machine flows back to the second under-net white water pool through a second return pipeline.
According to the papermaking circulation system and method, the difference of the calcium carbonate requirements of different paper types is utilized, so that lost calcium carbonate is subjected to cross-workshop large circulation, namely, calcium carbonate and fibers lost in cultural paper are subjected to air floatation treatment to become a part of sludge, the sludge reaches proper dryness through a plate-and-frame filter press, and then the sludge is sent to an incinerator to generate electric energy and heat energy, meanwhile, the calcium carbonate basically exists in a calcium oxide form, and the alkalinity of the calcium oxide is utilized to neutralize the sour taste in an OCC pulping system, so that the paper forming index is not influenced. Not only comprehensively utilizes calcium carbonate resources, but also improves the working environment of workshops. According to the application, the recycling of the calcium carbonate is completed by utilizing different requirements of different paper types on the calcium carbonate, so that the solid waste is reduced, and the production cost is saved; according to the application, the pH value of the OCC pulping system is regulated by utilizing calcium oxide generated after high-temperature treatment of calcium carbonate, the working environment of a workshop is improved, and meanwhile, heat energy and electric energy are generated by incineration, so that effective utilization of resources is realized.
Drawings
Fig. 1 is a schematic structural view of a papermaking circulation system according to the present application.
Wherein: 11. a first mesh portion; 12. a first press section; 13. a first front drying section; 14. a first sizing section; 15. a first post-drying section; 16. a first calendered curl;
21. a first off-grid white pool; 22. a first air floatation machine; 23. a first sludge tank; 24. a first plate and frame filter press; 25. an incinerator;
31. a pulper; 32. a pulping system; 33. a second mesh portion; 34. a second press section; 35. a second front drying section; 36. a second sizing section; 37. a second post-drying section; 38. a second calendaring curl;
41. a second off-grid white pool; 42. a second air floatation machine; 43. a second sludge tank; 44. and a second plate and frame filter press.
Detailed Description
The present application will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the application and practice it.
As shown in the figure, the application provides a papermaking circulation system, which comprises a cultural paper papermaking system and a boxboard papermaking system, wherein the cultural paper papermaking system sequentially comprises a first net part 11, a first press part 12, a first front drying part 13, a first sizing part 14, a first rear drying part 15 and a first calendaring and curling part 16 along the papermaking flow direction; the box board paper papermaking system sequentially comprises a pulper 31, a pulping system 32, a second net part 33, a second pressing part 34, a second front drying part 35, a second sizing part 36, a second rear drying part 37 and a second calendering and curling part 38 along the papermaking process direction, and the papermaking circulating system also comprises a first under-net white water pool 21 arranged at the lower side of the first net part 11, a first air flotation machine 22 for air flotation treatment of the under-net white water in the first under-net white water pool 21, a first sludge tank 23 for containing sludge discharged by the first air flotation machine 22 and a first plate-and-frame filter press 24 for treating the sludge in the first sludge tank 23; the papermaking circulation system further comprises a second under-screen white water tank 41 arranged at the lower side of the second screen part 33, a second air floatation machine 42 for carrying out air floatation treatment on the under-screen white water in the second under-screen white water tank 41, a second sludge tank 43 for containing sludge discharged by the second air floatation machine 42, and a second plate-and-frame filter press 44 for treating the sludge in the second sludge tank 43; the papermaking circulation system further comprises an incinerator 25, the incinerator 25 is used for incinerating sludge discharged by the first plate-and-frame filter press 24 and the second plate-and-frame filter press 44, and the incinerator 25 is also used for conveying incinerated substances to the pulper 31. The pulping system 32 includes a deslagging system, a screening system, a purifying system, a heat dispersing system, a pulping system and a pulp tower for storing pulp in sequence along the papermaking process direction.
A first backflow pipeline is further arranged between the first air flotation machine 22 and the first under-net white water tank 21, and the first backflow pipeline is used for conveying purified white water in the first air flotation machine 22 into the first under-net white water tank 21. A second return pipeline is further arranged between the second air floatation machine 42 and the second under-net white water tank 41, and the second return pipeline is used for conveying the purified white water in the second air floatation machine 42 into the second under-net white water tank 41.
The application also provides a papermaking circulation method, which comprises the steps of cultural paper papermaking and boxboard paper papermaking, wherein bleached pulp and calcium carbonate are added into a first net part 11 and sequentially pass through a first press part 12, a first front drying part 13, a first sizing part 14, a first rear drying part 15 and a first calendaring and curling part 16 to form cultural paper, the calcium carbonate and fibers generated by the first net part 11 enter a first under-net white water tank 21, the under-net white water in the first under-net white water tank 21 is subjected to air floatation treatment by a first air floatation machine 22, calcium carbonate, fibers and sticky matters generated in the first air floatation machine 22 are sent into a first sludge tank 23, sludge in the first sludge tank 23 enters a first plate-frame filter press 24, and sludge generated by the first plate-frame filter press 24 enters an incinerator 25 to be incinerated, the box board paper is made by adding calcium oxide generated by waste box board paper and an incinerator 25 into the pulper 31, then sequentially passing through a pulping system 32, a second net part 33, a second pressing part 34, a second front drying part 35, a second sizing part 36, a second rear drying part 37 and a second calendering and curling part 38, wherein calcium carbonate and fibers generated by the second net part 33 enter the second under-net white water tank 41, the net water in the second under-net white water tank 41 is subjected to air floatation treatment by a second air floatation machine 42, calcium carbonate, fibers and sticky generated by the second air floatation machine 42 are fed into a second sludge tank 43, sludge in the second sludge tank 43 enters a second plate-and-frame filter press 44, and sludge generated by the second plate-and-frame filter press 44 enters the incinerator 25 to be incinerated. The sludge enters a plate-and-frame filter press, the dryness can reach more than 50%, the combustion requirement is met, after the sludge is combusted by the incinerator 25, fibers and sticky matters are changed into carbon dioxide and water, and calcium carbonate is changed into calcium oxide. The calcium oxide has the effect of regulating the pH value, can regulate the pH value of a system for pulping OCC (waste boxboard paper) to be acidic, and reduces the generation of sour taste. The sludge produced by the cardboard paper itself is also sent to the incinerator 25 through the plate and frame filter press, thereby realizing the large circulation of calcium carbonate.
Preferably, the purified white water in the first air flotation machine 22 flows back to the first under-net white water tank 21 through a first return pipeline.
Preferably, the purified white water in the second air flotation machine 42 flows back to the second under-net white water tank 41 through a second return pipeline.
According to the papermaking circulation system and method, the difference of the requirements of different paper types on calcium carbonate is utilized, so that lost calcium carbonate is subjected to cross-workshop large circulation, namely, calcium carbonate and fibers lost in cultural paper are subjected to air floatation treatment to become a part of sludge, the sludge reaches proper dryness through a plate-and-frame filter press, and then the sludge is sent to an incinerator 25 to generate electric energy and heat energy, meanwhile, the calcium carbonate basically exists in a calcium oxide form, and the alkalinity of the calcium oxide is utilized to neutralize the sour taste in an OCC pulping system 32, so that paper forming indexes are not influenced. Not only comprehensively utilizes calcium carbonate resources, but also improves the working environment of workshops. According to the application, the recycling of the calcium carbonate is completed by utilizing different requirements of different paper types on the calcium carbonate, so that the solid waste is reduced, and the production cost is saved; the application utilizes the calcium oxide generated after the high-temperature treatment of the calcium carbonate to adjust the pH value of the OCC pulping system 32, improves the working environment of workshops, simultaneously burns to generate heat energy and electric energy, and realizes the effective utilization of resources.
The above-described embodiments are merely preferred embodiments for fully explaining the present application, and the scope of the present application is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present application, and are intended to be within the scope of the present application. The protection scope of the application is subject to the claims.
Claims (4)
1. A papermaking circulation system is characterized in that the papermaking circulation system comprises a cultural paper papermaking system and a boxboard paper papermaking system,
the cultural paper papermaking system sequentially comprises a first net part, a first press part, a first front drying part, a first sizing part, a first rear drying part and a first calendaring and curling part along the papermaking process direction;
the boxboard paper making system sequentially comprises a pulper, a pulping system, a second net part, a second pressing part, a second front drying part, a second sizing part, a second rear drying part and a second calendaring and curling part along the paper making flow direction,
the papermaking circulation system also comprises a first under-net white water tank arranged at the lower side of the first net, a first air floatation machine for carrying out air floatation treatment on the under-net white water in the first under-net white water tank, a first sludge tank for containing sludge discharged by the first air floatation machine, and a first plate-and-frame filter press for treating the sludge in the first sludge tank;
the papermaking circulation system also comprises a second under-net white water tank arranged at the lower side of the second net, a second air floatation machine for carrying out air floatation treatment on the under-net white water in the second under-net white water tank, a second sludge tank for containing sludge discharged by the second air floatation machine, and a second plate-and-frame filter press for treating the sludge in the second sludge tank;
the papermaking circulation system also comprises an incinerator, wherein the incinerator is used for incinerating sludge discharged by the first plate-and-frame filter press and the second plate-and-frame filter press, and the incinerator is also used for conveying incinerated objects to the pulper;
the pulping system sequentially comprises a deslagging system, a screening system, a purifying system, a heat dispersing system, a pulping system and a pulp tower for storing pulp along the papermaking flow direction;
a first backflow pipeline is arranged between the first air flotation machine and the first off-grid white water tank, and the first backflow pipeline is used for conveying purified white water in the first air flotation machine into the first off-grid white water tank;
a second reflux pipeline is arranged between the second air flotation machine and the second under-net white water tank, and the second reflux pipeline is used for conveying purified white water in the second air flotation machine into the second under-net white water tank.
2. A papermaking circulation method, characterized in that the method uses the papermaking circulation system as claimed in claim 1,
the papermaking circulation method comprises the steps of cultural paper papermaking and boxboard paper papermaking,
the paper making process includes adding bleached pulp and calcium carbonate into the first net part, passing through the first press part, the first front drying part, the first glue applying part, the first back drying part and the first calendering and curling part successively to form paper, feeding the calcium carbonate and fiber produced in the first net part into the first white water pond, air floating the white water in the first white water pond in the first air floating machine, feeding the calcium carbonate, fiber and adhesive produced in the first air floating machine into the first sludge tank, feeding the sludge in the first sludge tank into the first plate-and-frame filter press, feeding the sludge produced in the first plate-and-frame filter press into incinerator for incineration,
the box board paper is made by adding calcium oxide generated by waste box board paper and an incinerator into the pulper, then sequentially passing through a pulping system, a second net part, a second pressing part, a second front drying part, a second sizing part, a second rear drying part and a second calendering and curling part, wherein calcium carbonate and fibers generated by the second net part enter a second under-net white water tank, the under-net white water in the second under-net white water tank is subjected to air floatation treatment by a second air floatation machine, calcium carbonate, fibers and sticky generated by the second air floatation machine are fed into a second sludge tank, sludge in the second sludge tank enters a second plate-and-frame filter press, and sludge generated by the second plate-and-frame filter press enters the incinerator for incineration.
3. The papermaking circulation method as claimed in claim 2, wherein the purified white water in the first air flotation machine is returned to the first under-wire white water tank through a first return line.
4. A method of recycling paper making as set forth in claim 3, wherein said purified white water in said second air flotation machine is returned to said second under-wire white water tank through a second return line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621527.0A CN109537348B (en) | 2018-12-28 | 2018-12-28 | Papermaking circulation system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621527.0A CN109537348B (en) | 2018-12-28 | 2018-12-28 | Papermaking circulation system and method |
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| CN109537348A CN109537348A (en) | 2019-03-29 |
| CN109537348B true CN109537348B (en) | 2023-08-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003119692A (en) * | 2001-10-16 | 2003-04-23 | Oji Paper Co Ltd | Filler-added paper and method for producing the same |
| JP2009007238A (en) * | 2007-05-30 | 2009-01-15 | Oji Paper Co Ltd | Method for producing white inorganic particles |
| WO2009034056A1 (en) * | 2007-09-13 | 2009-03-19 | Linde Aktiengesellschaft | Removal of stickies from a pulp suspension, reduction of calcium compounds in reject and use of carbon dioxide in papermaking |
| JP2009127166A (en) * | 2007-11-27 | 2009-06-11 | Oji Paper Co Ltd | Coated white paperboard |
| CN209428837U (en) * | 2018-12-28 | 2019-09-24 | 玖龙纸业（太仓）有限公司 | A kind of papermaking circulation system |
-
2018
- 2018-12-28 CN CN201811621527.0A patent/CN109537348B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003119692A (en) * | 2001-10-16 | 2003-04-23 | Oji Paper Co Ltd | Filler-added paper and method for producing the same |
| JP2009007238A (en) * | 2007-05-30 | 2009-01-15 | Oji Paper Co Ltd | Method for producing white inorganic particles |
| WO2009034056A1 (en) * | 2007-09-13 | 2009-03-19 | Linde Aktiengesellschaft | Removal of stickies from a pulp suspension, reduction of calcium compounds in reject and use of carbon dioxide in papermaking |
| JP2009127166A (en) * | 2007-11-27 | 2009-06-11 | Oji Paper Co Ltd | Coated white paperboard |
| CN209428837U (en) * | 2018-12-28 | 2019-09-24 | 玖龙纸业（太仓）有限公司 | A kind of papermaking circulation system |
Non-Patent Citations (1)
| Title |
|---|
| 技改推进造纸清洁生产的实践;吴海标;;纸和造纸(第09期);全文 * |
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