CN112390432A - Waste paper pulping and disintegrating white water circulating treatment device and method - Google Patents
Waste paper pulping and disintegrating white water circulating treatment device and method Download PDFInfo
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- CN112390432A CN112390432A CN202011262252.3A CN202011262252A CN112390432A CN 112390432 A CN112390432 A CN 112390432A CN 202011262252 A CN202011262252 A CN 202011262252A CN 112390432 A CN112390432 A CN 112390432A
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- white water
- air flotation
- disintegrating
- flotation machine
- thickener
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
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Abstract
The invention relates to the technical field of pulping and papermaking, in particular to a waste paper pulping and disintegrating white water circulating treatment device and method. The invention filters the workshop drainage through the filtering device, effectively reduces the water consumption for papermaking, improves the quality of the crushed white water and reduces the fiber loss; meanwhile, the white water is circularly treated among the white water thickener, the air flotation machine and the white water tower, the anaerobic bacteria in the white water can be inhibited by the aid of the negative treatment of the air flotation machine, the crushed white water in the white water tower is always in a flowing state, and the problem of water body acidification and odor caused by long-term sealing of the white water tower or the white water tank is relieved.
Description
Technical Field
The invention relates to the technical field of pulping and papermaking, in particular to a waste paper pulping and disintegrating white water circulating treatment device and method.
Background
Waste paper is a renewable resource and one of important raw materials for papermaking, and in recent years, the recycling rate of the waste paper is increased, the quality of the waste paper after recycling fiber is gradually reduced, and the specific expression is that the strength of the paper is poor, the papermaking auxiliary agent in the paper is increased, and the waste paper is accumulated. The waste paper pulping is recycled through the internal circulation of the white water, so that the organic colloid of the white water is increased continuously, the increase of anionic garbage, the increase of stickies and the accumulation of starch are caused, and the acidification of water bodies is further caused to generate unpleasant gas if the white water is recycled for a long time, so that the product quality is influenced, and the improvement of the workshop environment is not facilitated.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for improving the quality of crushed white water and reducing fiber loss; waste paper pulping and white water recycling treatment device and method for reducing acidification and odor of white water.
In order to solve the technical problems, the technical scheme adopted by the invention for solving the technical problems is as follows:
a used paper pulping, disintegrating and white water circulating treatment device comprises:
the filtering device is used for discharging larger impurities in the workshop drainage water and conveying the white water after coarse filtration to the white water thickener;
the white water thickener is used for conveying the white water after fine filtration to the air flotation machine and simultaneously pumping the fibers collected by fine filtration to the pulper;
the air flotation machine is used for carrying out air flotation purification on the white water after the fine filtration and conveying the purified white water to the white water tower;
and the white water tower is used for conveying part of the white water into the pulper and simultaneously pumping the rest part of the white water into the white water thickener so that the white water is circularly treated among the white water thickener, the air flotation machine and the white water tower.
Further, the filtering device comprises a coarse grating and a fine grating, wherein the coarse grating and the fine grating are arranged in a staggered mode to form a grating group with alternate thicknesses and sizes for filtering large-size impurities.
Further, the filtering device comprises a desander which discharges the heavier impurities by means of rotary centrifugation to obtain the good pulp, and the desander discharges the obtained good pulp into the white water concentrator.
Further, compressed gas is introduced into the air flotation machine to mix the compressed gas with the white water, and fine impurities or heavier impurities in the white water are separated under the air flotation action of the compressed gas.
Further, the air flotation machine can separate fine impurities in the white water by adopting a deep air flotation mode, a shallow air flotation mode or a laminated air flotation mode.
The device further comprises an impurity treatment device, the impurity treatment device comprises a filter press and a thermoelectric incinerator, the filter press dehydrates the impurities filtered by the filter device and the white water thickener to form solid matters, and the thermoelectric incinerator incinerates the solid matters.
Furthermore, a vacuum generator and an injection pipe are arranged on the air floatation machine, the vacuum generator vacuumizes the air floatation machine to accelerate the movement speed of bubbles, the injection pipe is obliquely arranged at the bottom of the air floatation machine, and white water in the air floatation machine forms turbulence by injecting the white water through the injection pipe.
Further, the compressed gas is compressed air or compressed oxygen.
The invention also comprises a waste paper pulping and disintegrating white water circulating treatment method, which comprises the following steps of;
filtering and discharging larger impurities in workshop drainage water, and conveying the obtained good pulp to a white water thickener;
step two, the white water thickener conveys fibers collected from the good pulp into a pulper, conveys the white water with the collected fibers into an air floatation machine for air floatation treatment to separate fine impurities, and conveys the separated white water into a white water tower;
and step three, conveying one part of the white water in the white water tower to a pulper to break the white water, and pumping the other part of the white water to a white water thickener to circularly treat the white water among the white water thickener, the air flotation machine and the white water tower.
Further, the white water in the air flotation machine is stirred to form turbulent flow, and meanwhile, the vacuum generator is used for vacuumizing the white water subjected to air flotation treatment in the air flotation machine.
The invention has the beneficial effects that:
the invention filters the workshop drainage through the filtering device, effectively reduces the water consumption for papermaking, improves the quality of the crushed white water and reduces the fiber loss; meanwhile, the white water is circularly treated among the white water thickener, the air flotation machine and the white water tower, the anaerobic bacteria in the white water can be inhibited by the aid of the negative treatment of the air flotation machine, the crushed white water in the white water tower is always in a flowing state, and the problem of water body acidification and odor caused by long-term sealing of the white water tower or the white water tank is relieved.
Drawings
Fig. 1 is a schematic structural diagram of a waste paper pulping, disintegrating and white water circulating treatment device and method of the invention.
The reference numbers in the figures illustrate: 1, a grid group; 2. a desander; 3. a white water thickener; 4. an air flotation machine; 5. a white water tower; 6. a pulper;
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1, a used paper pulp-making, breaking and white water circulation processing apparatus includes:
the filtering device is used for discharging larger impurities in the workshop drainage water and conveying the white water after coarse filtration to the white water thickener 3;
the white water thickener 3 is used for conveying the white water after fine filtration to the air flotation machine 4 and simultaneously pumping the fibers collected after fine filtration to the pulper 6;
the air flotation machine 4 is used for carrying out air flotation purification on the white water after the fine filtration and conveying the purified white water to the white water tower 5;
and the white water tower 5 is used for conveying part of the white water into the pulper 6 and simultaneously pumping the rest part of the white water into the white water thickener 3, so that the white water is circularly processed among the white water thickener 3, the air flotation machine 4 and the white water tower 5.
The invention filters the workshop drainage through the filtering device, effectively reduces the water consumption for papermaking, improves the quality of the crushed white water and reduces the fiber loss; meanwhile, the white water is circularly treated among the white water thickener 3, the air flotation machine 4 and the white water tower 5, the anaerobic bacteria in the white water can be inhibited by the aid of the negative treatment of the air flotation machine 4, the broken white water in the white water tower 5 is always in a flowing state, and the problem of water body acidification and odor caused by long-term sealing of the white water tower 5 or the white water tank is relieved.
The air flotation machine 4 carries out air flotation purification on the white water, can effectively reduce organic colloid in the white water, and reduces the accumulation of anionic garbage, sticky matters and starch.
Utilize filter equipment to handle the retrieval and utilization to the disintegrating white water to workshop drainage, the white water quality obtains promoting, reduces the fiber loss simultaneously, reduces sewage treatment cost, reduces the cost and increases, the environmental protection.
The design of the flowing impurity removal of the white water tower 5 or the white water tank is utilized, the quality of the white water to be crushed can be further improved, the odor problem caused by the closed white water is effectively reduced, and the workshop environment is improved.
The filtering device comprises a coarse grating and a fine grating which are arranged in a staggered mode to form a grating group 1 with alternate thickness and size for filtering large-size impurities. The filtering device comprises a desander, the desander discharges heavier impurities through rotary centrifugation to obtain good pulp, and the desander discharges the obtained good pulp into the white water concentrator.
Compressed gas is introduced into the air flotation machine to mix the compressed gas with the white water, and fine impurities or heavier impurities in the white water are separated under the air flotation action of the compressed gas.
The air flotation machine can separate fine impurities in the white water by adopting a deep air flotation mode, a shallow air flotation mode or a laminated air flotation mode.
The device further comprises an impurity treatment device, the impurity treatment device comprises a filter press and a thermoelectric incinerator, the filter press dehydrates the impurities filtered by the filter device and the white water thickener to form solid matters, and the thermoelectric incinerator incinerates the solid matters.
The air flotation machine is provided with a vacuum generator and an injection pipe, the vacuum generator vacuumizes the air flotation machine to accelerate the moving speed of bubbles, the injection pipe is obliquely arranged at the bottom of the air flotation machine, and white water is injected through the injection pipe to enable the white water in the air flotation machine to form turbulent flow.
The compressed gas is compressed air or compressed oxygen.
The invention also comprises a waste paper pulping and disintegrating white water circulating treatment method, which comprises the following steps of;
filtering and discharging larger impurities in workshop drainage water, and conveying the obtained good pulp to a white water thickener;
step two, the white water thickener conveys fibers collected from the good pulp into a pulper, conveys the white water with the collected fibers into an air floatation machine for air floatation treatment to separate fine impurities, and conveys the separated white water into a white water tower;
and step three, conveying one part of the white water in the white water tower to a pulper to break the white water, and pumping the other part of the white water to a white water thickener to circularly treat the white water among the white water thickener, the air flotation machine and the white water tower.
The white water in the air floatation machine is stirred to form turbulent flow, and meanwhile, the vacuum generator is used for vacuumizing the white water subjected to air floatation treatment in the air floatation machine.
The grid set can prevent large-size impurities, such as plastic, foam and the like. The discharged water is collected and sent to a desander by a pump, the desander can discharge most heavy impurities with higher density such as soil and the like through rotating and centrifuging to obtain good pulp, the good pulp mainly comprises water, fibers and fine light impurities, the outlet pressure of the good pulp is higher, and the good pulp directly enters a white water thickener without pumping.
The white water thickener can concentrate the fiber in water, the fiber is collected and then is pumped to the pulper for being pulped, the filtered white water needs to be pumped to the air flotation machine, the air flotation machine is mixed with the filtered white water by means of compressed air, the air flotation machine can separate out tiny sticky matters, and meanwhile, the air flotation machine also has the effect of collecting heavy slag, and the purified white water can be recycled to a white water tower or a white water tank to provide the pulped white water for the pulper.
Light and heavy impurities discharged by the sand remover and the air floatation are collected and then are pumped into a filter press, and solid matters after the filter press is dehydrated have incineration conditions, so that the filter press is used for heating a power plant to incinerate and generate power. The water produced by the filter press is sent to sewage treatment.
The invention increases the flow of pumping to the thickener, mainly aims to inhibit the anaerobic bacteria of white water by compressed air in the air floatation equipment, ensure that the crushed white water is in a flowing state all the time and simultaneously ensure that fibers are not lost.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A waste paper pulping, disintegrating and white water circulating treatment device is characterized by comprising:
the filtering device is used for discharging larger impurities in the workshop drainage water and conveying the white water after coarse filtration to the white water thickener;
the white water thickener is used for conveying the white water after fine filtration to the air flotation machine and simultaneously pumping the fibers collected by fine filtration to the pulper;
the air flotation machine is used for carrying out air flotation purification on the white water after the fine filtration and conveying the purified white water to the white water tower;
and the white water tower is used for conveying part of the white water into the pulper and simultaneously pumping the rest part of the white water into the white water thickener so that the white water is circularly treated among the white water thickener, the air flotation machine and the white water tower.
2. The used paper pulping, disintegrating and white water recycling apparatus of claim 1, wherein the filtering means comprises coarse and fine grids, and the coarse and fine grids are alternately arranged to form a grid group for filtering large-sized impurities.
3. The wastepaper pulping, disintegrating whitewater circulating apparatus of claim 1, wherein the filtering means comprises a desander which discharges heavier impurities by means of a rotary centrifuge to obtain accept pulp, and the desander discharges the obtained accept pulp into the white water thickener.
4. The waste paper pulping and disintegrating whitewater recycling apparatus of claim 1, wherein the compressed air is introduced into the air flotation machine to mix the compressed air with the white water, and the fine impurities or the heavier impurities in the white water are separated by the air flotation of the compressed air.
5. The waste paper pulping, disintegrating and white water recycling device as recited in claim 1, wherein the air flotation machine can separate fine impurities in the white water by a deep air flotation method, a shallow air flotation method or a laminated air flotation method.
6. The used paper pulping, disintegrating and white water recycling apparatus of claim 1, further comprising an impurity treating apparatus, wherein the impurity treating apparatus comprises a filter press and a thermoelectric incinerator, the filter press dehydrates the impurities filtered by the filtering apparatus and the white water thickener to form solids, and the thermoelectric incinerator incinerates the solids.
7. The waste paper pulping and disintegrating whitewater circulation processing apparatus as defined in claim 1, wherein the air flotation machine is provided with a vacuum generator and an injection pipe, the vacuum generator vacuumizes the air flotation machine to accelerate the moving speed of the air bubbles, the injection pipe is obliquely arranged at the bottom of the air flotation machine, and the white water in the air flotation machine forms a turbulent flow by injecting the white water through the injection pipe.
8. The used paper pulping, breaking and whitewater recycling apparatus of claim 4, wherein the compressed gas is compressed air or compressed oxygen.
9. A waste paper pulping, disintegrating and white water circulating treatment method is characterized by comprising the following steps of;
filtering and discharging larger impurities in workshop drainage water, and conveying the obtained good pulp to a white water thickener;
step two, the white water thickener conveys fibers collected from the good pulp into a pulper, conveys the white water with the collected fibers into an air floatation machine for air floatation treatment to separate fine impurities, and conveys the separated white water into a white water tower;
and step three, conveying one part of the white water in the white water tower to a pulper to break the white water, and pumping the other part of the white water to a white water thickener to circularly treat the white water among the white water thickener, the air flotation machine and the white water tower.
10. The waste paper pulping and disintegrating whitewater circulating treatment method of claim 9, wherein the white water in the air flotation machine is stirred to form a turbulent flow, and the vacuum generator vacuumizes the white water subjected to the air flotation treatment in the air flotation machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262252.3A CN112390432A (en) | 2020-11-12 | 2020-11-12 | Waste paper pulping and disintegrating white water circulating treatment device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262252.3A CN112390432A (en) | 2020-11-12 | 2020-11-12 | Waste paper pulping and disintegrating white water circulating treatment device and method |
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| CN112390432A true CN112390432A (en) | 2021-02-23 |
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| CN202011262252.3A Pending CN112390432A (en) | 2020-11-12 | 2020-11-12 | Waste paper pulping and disintegrating white water circulating treatment device and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591085A (en) * | 2008-05-29 | 2009-12-02 | 中国印钞造币总公司 | A kind of wastewater treatment and reuse technology for paper mill |
| CN104328707A (en) * | 2014-10-31 | 2015-02-04 | 玖龙纸业（太仓）有限公司 | White water treatment method and device for paper-making machine |
| CN204780447U (en) * | 2015-05-29 | 2015-11-18 | 东莞玖龙纸业有限公司 | Improve device of plain boiled water pureness degree |
| CN108423923A (en) * | 2018-02-12 | 2018-08-21 | 浙江和泓环保纸业有限公司 | A kind of recoverying and utilizing method of papermaking wastewater |
| CN108486937A (en) * | 2018-04-19 | 2018-09-04 | 玖龙纸业（太仓）有限公司 | A kind of boxboard pulping system |
-
2020
- 2020-11-12 CN CN202011262252.3A patent/CN112390432A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591085A (en) * | 2008-05-29 | 2009-12-02 | 中国印钞造币总公司 | A kind of wastewater treatment and reuse technology for paper mill |
| CN104328707A (en) * | 2014-10-31 | 2015-02-04 | 玖龙纸业（太仓）有限公司 | White water treatment method and device for paper-making machine |
| CN204780447U (en) * | 2015-05-29 | 2015-11-18 | 东莞玖龙纸业有限公司 | Improve device of plain boiled water pureness degree |
| CN108423923A (en) * | 2018-02-12 | 2018-08-21 | 浙江和泓环保纸业有限公司 | A kind of recoverying and utilizing method of papermaking wastewater |
| CN108486937A (en) * | 2018-04-19 | 2018-09-04 | 玖龙纸业（太仓）有限公司 | A kind of boxboard pulping system |
Non-Patent Citations (2)
| Title |
|---|
| 万金泉，马邕文编著: "《造纸工业环境工程导论》", 31 August 2005, 中国轻工业出版社 * |
| 王石军主编: "《水质净化技术》", 31 July 2004, 中国建筑工业出版社 * |
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Application publication date: 20210223 |
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