CN105986502B - Slurry handling process is reclaimed in a kind of papermaking - Google Patents
Slurry handling process is reclaimed in a kind of papermaking Download PDFInfo
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- CN105986502B CN105986502B CN201510086466.2A CN201510086466A CN105986502B CN 105986502 B CN105986502 B CN 105986502B CN 201510086466 A CN201510086466 A CN 201510086466A CN 105986502 B CN105986502 B CN 105986502B
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Abstract
The present invention relates to a kind of papermaking to reclaim slurry handling process, it is characterised in that the technique comprises the following steps successively：(1) Bubble-floating Method processing mthod of white water from paper making, is recycled slurry；(2) recovery slurry obtained by step (1) is transported to broad-leaved slurry pulper and carries out pulping processing, and make the concentration in pulper stable；(3) slurry supplying to slurry line, carries out follow-up paper production obtained by step (2).Compared with prior art, the present invention has the advantages that recovery slurry concentration is high, and slurry line concentration is stable.
Description
Technical field
The present invention relates to a kind of papermaking to reclaim slurry handling process, more particularly, to a kind of recovery after Bubble-floating Method is handled
The handling process of slurry.
Background technology
Clean manufacturing is the inexorable trend of paper industry sustainable development, and paper industry industrial water circulating and recovering is one
Important clean manufacturing approach." the paper industry pollution discharge standard " of the newest announcement of State Environmental Protection Administration, enters to this
The development of journey serves positive facilitation.National standard GB3544-2008 improves the emission request of ambient water, new discharge mark
Accurate further strict paper making water discharge capacity.Copy paper water is reduced in China and white water recycling has entered to some extent at present
OK, but also there is a big difference away from comprehensive paper waste closed circulation and so-called " zero-emission ".At present, mthod of white water from paper making usually through
Fiber that Bubble-floating Method processing recovery is lost in etc..Air supporting law technology is simple, easy to operate, and input cost is low.
The operation principle of Bubble-floating Method plain boiled water processing, is that air is dissolved in water under pressure, is situated between as work
Matter, then discharged by the specific release sudden pressure reduction being immersed in processed plain boiled water, produce countless fine gas
Bubble, is adhered to each other with the impurity particle in the plain boiled water after aggregation, its density is less than the density of water, and bubbles through the water column
On, turn into scum silica frost and remove, be purified plain boiled water.Bubble-floating Method processing plain boiled water is that more one kind is used to obtain in current white water recycling
Reuse technology, conventional dissolved air flotation therein are used to handle mthod of white water from paper making very early, develop jet air float plain boiled water again later
Reuse technology, it have developed super efficiency shallow air flotation technology again recently.
Mthod of white water from paper making produces substantial amounts of recycled fiber after Bubble-floating Method is handled, and its concentration is relatively low, typically below 2%.This
A little recycled fibers can recycle after collecting, and traditional processing method is to add broke system, passes through the dense of broken line
Contract, match somebody with somebody after increase broken concentration and expect in slurry line.In the design of some economy type paper machines, broken line flow is usually non-
Often easy, thickener and fluffer are often cancelled, in this way, the concentration control of broken line becomes most important, if concentration is less than
The concentration of slurry, it will influence to starch the normal fluctuation of concentration of line, so as to cause defibrination and quantitative fluctuation, reduce production stability, have
When can also cause production loss.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide slurry is reclaimed in a kind of papermaking
Handling process.
The purpose of the present invention can be achieved through the following technical solutions：
Slurry handling process is reclaimed in a kind of papermaking, it is characterised in that the technique comprises the following steps successively：
(1) Bubble-floating Method processing mthod of white water from paper making, is recycled slurry；
(2) recovery slurry obtained by step (1) is transported to broad-leaved slurry pulper and carries out pulping processing, and made in pulper
Concentration is stable；
(3) slurry supplying to slurry line, carries out follow-up paper production obtained by step (2).
The step of Bubble-floating Method described in step (1) and process conditions are：White water pump is opened, plain boiled water is entered Air-float separator；
After plain boiled water will be injected into overflow liquid level, open the driving of Air-float separator and skim mud device；Air-float separator brings into operation, and adjusts molten vapour
The admission pressure and outlet hydraulic pressure of tank, enable the slurry in plain boiled water normally to float；
Described Air-float separator connection air compressor machine, air compressor machine pressure is 0.6-1MPa, air mass flow 0.8-1.5m3/ h, institute
The steam dissolving container outlet pressure stated is 0.4-0.6MPa, and the motor frequency of described Air-float separator is 20-30Hz, described slash mud
The electric machine frequency of device is 5-15Hz.
The concentration of recovery slurry in step (1) after Bubble-floating Method is handled is below 2%.
Concentration in described pulper is：5-6wt%.
Regulation makes the concentration in pulper stable by the following method：
Regulation manually：According to the weight for the slurry thrown, required amount of water is calculated, during pulping, according to flowmeter
Number device control amount of water, water valve is closed after reaching institute's water requirement；
Or automatically adjust：After pulping concentration, slurry weight are set in the program of the automatic pulping of system, open certainly
Dynamic model formula, you can complete pulping all processes on request.
Described pulper is provided with liquid level gauge, when the material liquid level in pulper reaches 50%, i.e., opens pulping immediately
Machine carries out pulping.
Concentration of concentration of the described recovery slurry after pulping is handled not less than slurry line.
After slurry supplying slurry line described in step (3), the concentration by dense water transfer adjustment slurry line is stable；
Described dense water transfer uses the plain boiled water in system, after setting slurry concentration needed for papermaking, according to densimeter
It has been shown that, if existing concentration is opened greatly higher than setting concentration, dense water transfer valve, reduce concentration；If existing concentration is less than setting concentration,
Dense water transfer valve reduces, and increases concentration.
In order that recovery slurry can be recycled all, the working time of pulper is often according to recovery slurry in pulper
In storage capacity situation and be adjusted, when reclaim slurry will produce overflow when, immediately open pulper carry out pulping.
Compared with prior art, the present invention can eliminate influence of the recovery slurry of low concentration to broken line concentration, make damage
Paper yarn concentration is stable.After the concentration for reclaiming slurry is stable and not less than slurry line concentration, when being incorporated in slurry line, in dense water transfer
Under effect, starching the concentration of line will not fluctuate, and most significant benefit is to ensure the effect of defibrination, and simultaneous quantitative will keep stable,
Benefit is carried out in this stabilized zone to original paper quality, reduces the loss brought by quality fluctuation..
Brief description of the drawings
Fig. 1 is that slurry handling process is reclaimed in the papermaking of traditional route；
Slurry handling process is reclaimed in the papermaking that Fig. 2 is the present invention.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
As shown in Figure 2, slurry handling process is reclaimed in a kind of papermaking, comprises the following steps successively：
(1) Bubble-floating Method processing mthod of white water from paper making, is recycled slurry；The step of described Bubble-floating Method and process conditions are：Open
White water pump is opened, plain boiled water is entered Air-float separator；After plain boiled water will be injected into overflow liquid level, open the driving of Air-float separator and skim mud
Device；Air-float separator brings into operation, and adjusts the admission pressure and outlet hydraulic pressure of steam dissolving container, the slurry in plain boiled water is normally floated
Rise；
Described Air-float separator connection air compressor machine, air compressor machine pressure is 0.8MPa, air mass flow 1.0m3/ h, described is molten
Vapour tank outlet pressure is 0.5MPa, and the motor frequency of described Air-float separator is 25Hz, the motor frequency of described slash mud device
Rate is 10Hz.
The concentration of recovery slurry after Bubble-floating Method is handled is below 2%.
(2) recovery slurry obtained by step (1) is transported to broad-leaved slurry pulper and carries out pulping processing, and made in pulper
Concentration is stably maintained at 5.5wt%.
Regulation makes the concentration in pulper stable by the following method：Regulation manually：According to the weight for the slurry thrown, meter
Calculate required amount of water, during pulping, amount of water is controlled according to flowmeter counter, water valve is closed i.e. after reaching institute's water requirement
Can；
In order that recovery slurry can be recycled all, the working time of pulper is often according to recovery slurry in pulper
In storage capacity situation and be adjusted, described pulper is provided with liquid level gauge, and the material liquid level in pulper reaches 50%
When, i.e., pulper is opened immediately carries out pulping.
Concentration of concentration of the described recovery slurry after pulping is handled not less than slurry line.
(3) for slurry supplying obtained by step (2) to slurry line, the concentration by dense water transfer adjustment slurry line is stable, is subsequently made
Paper produces.
Described dense water transfer uses the plain boiled water in system, after setting slurry concentration needed for papermaking, according to densimeter
It has been shown that, if existing concentration is opened greatly higher than setting concentration, dense water transfer valve, reduce concentration；If existing concentration is less than setting concentration,
Dense water transfer valve reduces, and increases concentration.
Embodiment 2
Slurry handling process is reclaimed in a kind of papermaking, comprises the following steps successively：
(1) Bubble-floating Method processing mthod of white water from paper making, is recycled slurry；The step of described Bubble-floating Method and process conditions are：Open
White water pump is opened, plain boiled water is entered Air-float separator；After plain boiled water will be injected into overflow liquid level, open the driving of Air-float separator and skim mud
Device；Air-float separator brings into operation, and adjusts the admission pressure and outlet hydraulic pressure of steam dissolving container, the slurry in plain boiled water is normally floated
Rise；
Described Air-float separator connection air compressor machine, air compressor machine pressure is 0.6MPa, air mass flow 0.8m3/ h, described is molten
Vapour tank outlet pressure is 0.4MPa, and the motor frequency of described Air-float separator is 20Hz, the motor frequency of described slash mud device
Rate is 5Hz.
The concentration of recovery slurry after Bubble-floating Method is handled is below 2%.
(2) recovery slurry obtained by step (1) is transported to broad-leaved slurry pulper and carries out pulping processing, and made in pulper
Concentration is stably maintained at 5wt%.
Regulation makes the concentration in pulper stable by the following method：Automatically adjust：In the program of the automatic pulping of system
After setting pulping concentration, slurry weight, automatic mode is opened, you can complete pulping all processes on request.
In order that recovery slurry can be recycled all, the working time of pulper is often according to recovery slurry in pulper
In storage capacity situation and be adjusted, described pulper is provided with liquid level gauge, and the material liquid level in pulper reaches 50%
When, i.e., pulper is opened immediately carries out pulping.
Concentration of concentration of the described recovery slurry after pulping is handled not less than slurry line.
(3) for slurry supplying obtained by step (2) to slurry line, the concentration by dense water transfer adjustment slurry line is stable, is subsequently made
Paper produces.
Described dense water transfer uses the plain boiled water in system, after setting slurry concentration needed for papermaking, according to densimeter
It has been shown that, if existing concentration is opened greatly higher than setting concentration, dense water transfer valve, reduce concentration；If existing concentration is less than setting concentration,
Dense water transfer valve reduces, and increases concentration.
Embodiment 3
Slurry handling process is reclaimed in a kind of papermaking, comprises the following steps successively：
(1) Bubble-floating Method processing mthod of white water from paper making, is recycled slurry；The step of described Bubble-floating Method and process conditions are：Open
White water pump is opened, plain boiled water is entered Air-float separator；After plain boiled water will be injected into overflow liquid level, open the driving of Air-float separator and skim mud
Device；Air-float separator brings into operation, and adjusts the admission pressure and outlet hydraulic pressure of steam dissolving container, the slurry in plain boiled water is normally floated
Rise；
Described Air-float separator connection air compressor machine, air compressor machine pressure is 1MPa, air mass flow 1.5m3/ h, described molten vapour
Tank outlet pressure is 0.6MPa, and the motor frequency of described Air-float separator is 30Hz, the electric machine frequency of described slash mud device
For 15Hz.
The concentration of recovery slurry after Bubble-floating Method is handled is below 2%.
(2) recovery slurry obtained by step (1) is transported to broad-leaved slurry pulper and carries out pulping processing, and made in pulper
Concentration is stably maintained at 6wt%.
Regulation makes the concentration in pulper stable by the following method：Pulping is set in the program of the automatic pulping of system
After concentration, slurry weight, automatic mode is opened, you can complete pulping all processes on request.
In order that recovery slurry can be recycled all, the working time of pulper is often according to recovery slurry in pulper
In storage capacity situation and be adjusted, described pulper is provided with liquid level gauge, and the material liquid level in pulper reaches 50%
When, i.e., pulper is opened immediately carries out pulping.
Concentration of concentration of the described recovery slurry after pulping is handled not less than slurry line.
(3) for slurry supplying obtained by step (2) to slurry line, the concentration by dense water transfer adjustment slurry line is stable, is subsequently made
Paper produces.
Described dense water transfer uses the plain boiled water in system, after setting slurry concentration needed for papermaking, according to densimeter
It has been shown that, if existing concentration is opened greatly higher than setting concentration, dense water transfer valve, reduce concentration；If existing concentration is less than setting concentration,
Dense water transfer valve reduces, and increases concentration.
Claims (6)
1. slurry handling process is reclaimed in a kind of papermaking, it is characterised in that the technique comprises the following steps successively：
(1) Bubble-floating Method processing mthod of white water from paper making, is recycled slurry；
(2) recovery slurry obtained by step (1) is transported to broad-leaved slurry pulper and carries out pulping processing, and make the concentration in pulper
It is stable；
(3) slurry supplying to slurry line, carries out follow-up paper production obtained by step (2)；
The step of Bubble-floating Method described in step (1) and process conditions are：White water pump is opened, plain boiled water is entered Air-float separator；Treat white
After water will be injected into overflow liquid level, open the driving of Air-float separator and skim mud device；Air-float separator brings into operation, and adjusts steam dissolving container
Admission pressure and outlet hydraulic pressure, enable the slurry in plain boiled water normally to float；
Described Air-float separator connection air compressor machine, air compressor machine pressure is 0.6-1MPa, air mass flow 0.8-1.5m3/ h, described is molten
Vapour tank outlet pressure is 0.4-0.6MPa, and the motor frequency of described Air-float separator is 20-30Hz, described slash mud device
Electric machine frequency is 5-15Hz；
After slurry supplying slurry line described in step (3), the concentration by dense water transfer adjustment slurry line is stable；
Described dense water transfer uses the plain boiled water in system, after setting slurry concentration needed for papermaking, is shown according to densimeter,
If existing concentration is opened greatly higher than setting concentration, dense water transfer valve, reduce concentration；If existing concentration is less than setting concentration, dense tune
Penstock reduces, and increases concentration.
2. a kind of papermaking recovery slurry handling process according to claim 1, it is characterised in that through air supporting in step (1)
The concentration of recovery slurry after method processing is below 2%.
3. a kind of papermaking recovery slurry handling process according to claim 1, it is characterised in that in described pulper
Concentration is：5-6wt%.
4. a kind of papermaking recovery slurry handling process according to claim 1 or 3, it is characterised in that by the following method
Regulation makes the concentration in pulper stable：
Regulation manually：According to the weight for the slurry thrown, required amount of water is calculated, during pulping, according to flowmeter counter
Amount of water is controlled, water valve is closed after reaching institute's water requirement；
Or automatically adjust：After pulping concentration, slurry weight are set in the program of the automatic pulping of system, automatic mold is opened
Formula, you can complete pulping all processes on request.
5. a kind of papermaking recovery slurry handling process according to claim 1, it is characterised in that set on described pulper
There is a liquid level gauge, when the material liquid level in pulper reaches 50%, i.e., open pulper immediately and carry out pulping.
A kind of 6. papermaking recovery slurry handling process according to claim 1, it is characterised in that described recovery slurry warp
Concentration after pulping processing is not less than the concentration for starching line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510086466.2A CN105986502B (en) | 2015-02-16 | 2015-02-16 | Slurry handling process is reclaimed in a kind of papermaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510086466.2A CN105986502B (en) | 2015-02-16 | 2015-02-16 | Slurry handling process is reclaimed in a kind of papermaking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105986502A CN105986502A (en) | 2016-10-05 |
| CN105986502B true CN105986502B (en) | 2018-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510086466.2A Active CN105986502B (en) | 2015-02-16 | 2015-02-16 | Slurry handling process is reclaimed in a kind of papermaking |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110130134B (en) * | 2018-02-02 | 2022-10-14 | 金红叶纸业集团有限公司 | Papermaking system and papermaking method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1213223C2 (en) * | 1960-02-15 | 1973-02-01 | Milos Krofta Dr Ing | Device for cleaning uncleared waste water in the paper, pulp and similar industries |
| CN2504255Y (en) * | 2001-10-16 | 2002-08-07 | 郑嘉祥 | Water purifying unit by air float process |
| CN100460592C (en) * | 2004-10-26 | 2009-02-11 | 中国印钞造币总公司 | Processing mthod of white water from paper making |
| 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 |
| CN201777908U (en) * | 2010-07-23 | 2011-03-30 | 福建铙山纸业集团有限公司 | Deep treatment system of papermaking wastewater |
| CN102102306A (en) * | 2010-12-10 | 2011-06-22 | 中顺洁柔纸业股份有限公司 | Recycle process of white water of papermaking system |
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