CN101838945B - Papermaking wastewater recycling method - Google Patents
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- CN101838945B CN101838945B CN2010102069164A CN201010206916A CN101838945B CN 101838945 B CN101838945 B CN 101838945B CN 2010102069164 A CN2010102069164 A CN 2010102069164A CN 201010206916 A CN201010206916 A CN 201010206916A CN 101838945 B CN101838945 B CN 101838945B
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Abstract
The invention discloses a papermaking wastewater recycling method, which comprises the following steps of: 1, conveying white water of one or more paper machine to a white water tank for collection; 2, pumping the white water collected in the white water tank in the step 1 to a multi-disk vacuum filter for filtration, and adding underlayer pulp before the white water is conveyed into the multi-disk vacuum filter; 3, separating filtrate after the white water is filtered by the multi-disk vacuum filter to form cloudy filtrate, clear filtrate and super clear filtrate; and 4, returning the cloudy filtrate separated by the step 3 to the multi-disk vacuum filter for filtration or using the cloudy filtrate as water for pulp production, using the clear filtrate as water for pulp production or water for pulp stripping of the multi-disk vacuum filter, and using the super clear filtrate to replace clear water.
Description
Technical field
The present invention relates to a kind of paper waste recycle method, especially relate to a kind of closed recycle method of mthod of white water from paper making.
Background technology
Paper industry environment and resource problem become increasingly conspicuous at present, and for pulp and paper industry, also more and more serious to the pollution of environment along with the increase of water consumption and wastewater discharge, the cost of wastewater treatment also increases considerably.How reasonably recycle water resource reduces wastewater discharge, has become the heat subject of current research.The whitewater closure recycle is to prevent from the source and reduce pollutant to produce, using water wisely, and the important means of administering outside elimination or the minimizing factory has important economy and environmental benefit.Plain boiled water treatment technology commonly used has: slanted screen is handled recovery, many disk filters, air flotation technology etc.Use at present slanted screen to handle the fiber recovery less than 40% in the mthod of white water from paper making, cyclic utilization rate has only about 50%, and technology is backward relatively, causes in the production process water consumption too high, and pollutant discharge amount is many; Air flotation technology is handled plain boiled water, because processing procedure need be added a large amount of chemicalss, the plain boiled water after the processing is prone to produce foam, has brought very big trouble to reuse, and the fiber fines and the filler that reclaim in the plain boiled water also can't be back to use the paper machine, and operating cost is higher relatively; And many disk filtration technology is better relatively, and it is pure physical process, relies on filtration to handle plain boiled water, and treatment effect is relatively good, well reuse and the not destruction system production of the fiber fines of recovery and filler, can direct reuse to the paper machine.In " papermaking process flow optimal design and production new technology and equipment Operation and Maintenance and quality inspection standard standard " book that in September, 2006, Chinese law garden publishing house published; In the 5th piece of chapter 2 second joint white-water system and paper making water closed circulation, introduced the method and apparatus of white water recycle, wherein in the 546-547 page or leaf, introduced many disc vacuum filters and filtered the flow process of plain boiled water and the structure of filter.The plain boiled water of being sent here by paper machine (about concentration 0.1%) mixes with filtered fluid after many disc vacuum filters filter and pre-hung slurry and is adjusted to the many disc vacuum filters of certain concentration (0.3%～0.5%) back entering.Turbid filtrating and clear filtrate produce vacuum after flowing through the water leg.Under vacuum action, fiber and filler form filter cake (concentration is generally 10 %～15 %) and obtain reclaiming on the fan sheet, and turbid filtrating (concentration is generally 0.01 %～0.04 %) Returning process filters again.Clear filtrate (concentration is generally 0.0021 %～0.009 a %) part is used for slurrying and washes net; Redundance can return paper manufacturing systems use or discharging; The many disc vacuum filters that have also can be divided into clear filtrate and ultra clear filtrate with clear filtrate, and (concentration is generally 20～50ppm), and ultra clear filtrate can be used for purposes such as wire-cloths water spray.The plain boiled water that the polydisc filtering technique reclaims can be divided into turbid filtrating, clear filtrate and ultra clear filtrate according to the difference of filtration time, is well suited for being back to use the different place of water quality requirement is used.Many disc vacuum filters are installed on the large-scale advanced paper production line of majority at present filter white-water system.
But because many disc vacuum filters complex structure, manufacture level requires high, and the installation site is higher, has the higher defective of investment, is restricting its application in the circulation of the medium and small papermaking board of majority whitewater closure.Many disc vacuum filters filter area commonly used is 85～300m
2, handling the plain boiled water ability is 100～650m
3/ h.Because of the production capacity of medium and small paper machine is little, be difficult to reach the plain boiled water water yield requirement that many disc vacuum filters are handled.On the other hand; The equipment of medium and small paper machine general technology is lower, and automatization level is low, and the production fluctuation is bigger; Be difficult to the plain boiled water flow that provides stable; Fiber fines in the plain boiled water is also big with other solid content fraction of particle fluctuation, and is bigger to the formation influence of many disc vacuum filters bed course slurry, influences strainability and effect.Therefore, many disc vacuum filters seldom use on medium and small paper machine white water recycle production line.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of and utilize many disc vacuum filters to handle medium and small paper machine mthod of white water from paper making, the method for realization cycling utilization of wastewater.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of paper waste cyclic utilization method may further comprise the steps:
Step 1, the plain boiled water of paper machine is delivered to white water chest collect;
Step 2, with the plain boiled water that the step 1 white water chest is collected, be pumped to many disc vacuum filters filtration treatment, plain boiled water added the bed course slurry before advancing many disc vacuum filters;
Step 3, will separate into turbid filtrating, clear filtrate and ultra clear filtrate through the filtrating of the plain boiled water after many disc vacuum filters filter;
Step 4, the separating obtained turbid filtrating of step 3 is returned many disc vacuum filters filter and/or send the slurry industrial water, clear filtrate is as slurry industrial water and/or many disc vacuum filters stripping slurry water, and ultra clear filtrate substitutes the clear water use,
It is characterized in that: the plain boiled water of the paper machine in the step 1 derives from the paper machine more than; The turbid filtrating feed tube of band fluid level controller is housed before the white water chest outlet white water pump; The turbid filtrating that step 3 is filtered through many disc vacuum filters advances that turbid reservoir, clear filtrate are entered the clear filtrate pond, ultra clear filtrate enters ultra clear filtrate pond; Be connected to communicating pipe between clear filtrate pond and the turbid reservoir; Clear filtrate can be connected to communicating pipe between ultra clear filtrate pond and the clear filtrate pond through flowing into turbid reservoir communicating pipe, and ultra clear filtrate can flow into the clear filtrate pond through communicating pipe; Turbid reservoir, clear filtrate pond, ultra clear filtrate pond are connected to the clear water water inlet pipe of band fluid level controller respectively.
Below be further improved plan:
One of improvement project: the bed course slurry that in step 2, adds is sulfate needlebush wood pulp, and beating degree is 30～35
0SR, behind the adding bed course slurry, the white water consistency that gets into many disc vacuum filters is 0.35wt%～0.5wt%.
Two of improvement project: vacuum was 0.017～0.033Mpa when many disc vacuum filters filtered plain boiled water.
Three of improvement project: the filtrating drainpipe arrival end of many disc vacuum filters is not less than 7m with vertical setting height(from bottom) between turbid reservoir, clear filtrate pond, the highest liquid level in ultra clear filtrate pond, and the vacuum control valve with atmosphere is set on the filtrate discharge pipe of many disc vacuum filters.
Four of improvement project: plain boiled water volume ratio after many disc vacuum filters filter is: 25～35 parts of turbid filtratings, 50～60 parts of clear filtrates, 10～20 parts of ultra clear filtrates.
Five of improvement project: turbid filtrating is returned many disc vacuum filters filtrations and/or is sent slurry to transfer dense water; Clear filtrate is as slip house pulp washing water and/or many disc vacuum filters stripping slurry water, and ultra clear filtrate is as the low pressure spray and/or the chemical production thinned water of paper-making process.
The invention has the beneficial effects as follows:, can replenish the water yield of each reservoir through using clear water, thereby help keeping the level stability of each reservoir according to the liquid level change of each reservoir; Through increasing additional white water pump; Simultaneously through before white water chest outlet white water pump and increase connecting pipe between the turbid reservoir; Control the plain boiled water amount that turbid filtrating flows into white water chest outlet white water pump through liquid level, help coming amount to regulate the circular flow of turbid filtrating, keep the stable operation of many disc vacuum filters at many disc vacuum filters according to the plain boiled water of many paper machines; Overcome because of the production capacity of medium and small paper machine is little, be difficult to reach the plain boiled water water yield requirement that many disc vacuum filters are handled; Overcome because of many little paper machine production fluctuations bigger; Be difficult to the plain boiled water flow that provides stable, many disc vacuum filters are difficult to the difficult problem on medium and small paper machine white water recycle production line, used, thereby realize that disc vacuum filter more than handles the plain boiled water of many paper machines; And can move by continous-stable; Reach and practice thrift investment, using water wisely, the purpose of minimizing wastewater discharge; Add long fiber needlebush wood pulp; And control certain beating degree; The formation of benefit disc vacuum filter bed course is arranged; Thereby the mixing plain boiled water fiber fines that overcomes because of many paper machines fluctuates greatly with other solid content fraction of particle, and is bigger to the formation influence of many disc vacuum filters bed course, influences the difficult problem of strainability and effect; Suitable height between many disc vacuum filter filtrating drainpipe arrival ends and turbid reservoir, clear filtrate pond, the highest liquid level in ultra clear filtrate pond; And the vacuum breaker identical with atmosphere be set on the filtrate discharge pipe of many disc vacuum filters; Can obtain appropriate vacuum degree through control valve according to the actual motion needs, thereby guarantee the stable operation of many disk filters.
Description of drawings
Fig. 1 is a paper waste recycle method flow diagram of the present invention.
Wherein: 1 is that white water chest, 2 is that turbid reservoir, 3 is that clear filtrate pond, 4 is that ultra clear filtrate pond, 5 is that many disk filters, 6 are that white water pump, 7 is that turbid filtrate pump, 8 is that additional white water pump, 9 is that clear filtrate pump, 10 is that ultra clear filtrate pump, 11～14 is that liquid level controls to adjust valves.
The specific embodiment
Elaborate below in conjunction with the accompanying drawing specific embodiments of the invention.
With reference to Fig. 1, the plain boiled water of one or more paper machine is delivered to white water chest 1 collect, between white water chest 1 outlet white water pump 6 inlet tubes and the turbid reservoir 2 connecting pipe is housed; The control valve 11 of band fluid level controller is housed on this connecting pipe; When the liquid level of white water chest 1 was lower than the low level setting value, control valve 11 was opened, and the turbid filtrating in the turbid reservoir 2 flows in the white water chest 1 outlet white water pump 6 through this connecting pipe; Reduce the plain boiled water discharge of white water chest 1; Improve the liquid level of white water chest 1, when attaining to a high place setting value, control valve 11 cuts out.The plain boiled water that white water chest 1 is collected is delivered to many disc vacuum filter 5 filtration treatment through white water pump 6, and plain boiled water added the bed course slurry before advancing many disc vacuum filters 5, and the preferred bed course slurry that adds is sulfate needlebush wood pulp, and beating degree is 30～35
0SR, the white water consistency that adds the many disc vacuum filters 5 of bed course slurry back entering is 0.35wt%～0.5wt%.Plain boiled water just is divided into turbid filtrating, clear filtrate, ultra clear filtrate through many disc vacuum filter 5 filtrate filtered by concentration; Turbid filter liquor concentration is 0.01wt%～0.04wt%; Clear filtrate concentration is 0.0021wt%～0.009wt%, and ultra clear filtrate concentration is 20～50ppm.The filtrate volume ratio is preferably 25～35 parts of turbid filtratings, 50～60 parts of clear filtrates, 10～20 parts of ultra clear filtrates.Turbid filtrating through turbid filtrate discharge pipe advance turbid reservoir 2, clear filtrate through the clear filtrate delivery pipe enter clear filtrate pond 3, ultra clear filtrate enters ultra clear filtrate pond 4 through ultra clear filtrate delivery pipe; The filtrate discharge tube inlet end of many disc vacuum filters 5 preferably is not less than 7m with vertical setting height(from bottom) between turbid reservoir 2, clear filtrate pond 3, the ultra clear filtrate pond 4 the highest liquid levels; The vacuum control valve of preferred setting and atmosphere on the filtrate discharge pipe of many disc vacuum filters 5, vacuum was preferably 0.017～0.033Mpa when many disc vacuum filters 5 filtered plain boiled waters.Be connected to connecting pipe between clear filtrate pond 3 and the turbid reservoir 2; Clear filtrate 3 can flow into turbid reservoir 2 through connecting pipe and can not reverse flow; Be connected to connecting pipe between ultra clear filtrate pond 4 and the clear filtrate pond 3, ultra clear filtrate can flow into clear filtrate pond 3 and can not reverse flow through connecting pipe; Turbid reservoir 2, clear filtrate pond 3, ultra clear filtrate pond 4 connect the clear water water inlet pipe respectively, and the control valve 12～14 of band liquid level control is arranged on the clear water pipe.When turbid reservoir 2 liquid levels are lower than the low level setting value, if clear filtrate 3 liquid levels are higher, can flow into turbid reservoir 2 through connecting pipe, control valve 12 is opened, and clear water adds in the turbid reservoir 2; When clear filtrate pond 3 liquid levels are lower than the low level setting value, if ultra clear filtrate pond 4 liquid levels are higher, can flow into clear filtrate pond 3 through connecting pipe, control valve 14 is opened, and clear water adds in the clear filtrate pond 3.Turbid filtrating is returned many disc vacuum filters 5 filtrations and/or is sent to reuse in the slurry production through turbid filtrate pump 7 through replenishing white water pump 8, preferably send slurry to transfer dense water as slip house; Clear filtrate send reuse and/or many disc vacuum filters 5 stripping slurry waters in the slurry production through clear filtrate pump 9, preferably as slip house pulp washing water and/or many disc vacuum filters stripping slurry water; Ultra clear filtrate send the workshop to substitute clear water through ultra clear filtrate pump 10 and uses, preferably as spray of the low pressure in the paper-making process and/or chemical production thinned water.
Embodiment 1:
The plain boiled water separate collection of five paper machines is delivered to white water chest 1; The plain boiled water that white water chest 1 is collected; Deliver to many disc vacuum filter 5 filtration treatment through white water pump 6, plain boiled water added the bed course slurry before advancing many disc vacuum filters 5, and the bed course slurry derives from a paper machine wherein; Slurry is planted and is sulfate needlebush wood pulp; Beating degree is 32 ° of SR, and adding the white water consistency that gets into many disc vacuum filters 5 after bed course is starched is 0.4 wt %, and the slurry of recovery is sent to the paper machine in bed course slurry source as the slurry use after pulling an oar.Plain boiled water just is divided into turbid filtrating, clear filtrate, ultra clear filtrate through many disc vacuum filter 5 filtrate filtered by concentration, and filtrate volume is than being 30 parts of turbid filtratings, 55 parts of clear filtrates, 15 parts of ultra clear filtrates.Turbid filtrating through turbid filtrate discharge pipe advance turbid reservoir 2, clear filtrate through the clear filtrate delivery pipe enter clear filtrate pond 3, ultra clear filtrate enters ultra clear filtrate pond 4 through ultra clear filtrate delivery pipe; The filtrate discharge tube inlet end of many disc vacuum filters 5 is 8m with vertical setting height(from bottom) between turbid reservoir 2, clear filtrate pond 3, the ultra clear filtrate pond 4 the highest liquid levels, and vacuum was 0.025Mpa when many disc vacuum filters 5 filtered plain boiled waters.Turbid filtrating is returned many disc vacuum filters 5 through additional white water pump 8 and is filtered and/or be sent to slip house through turbid filtrate pump 7 and send slurry to transfer dense water; Clear filtrate send slip house pulp washing water and/or many disc vacuum filters stripping slurry water through clear filtrate pump 9; Ultra clear filtrate send the workshop as spray of the low pressure in the paper-making process and/or chemical production thinned water through ultra clear filtrate pump 10, substitutes clear water and uses.
When wherein part paper machine is shut down or moved when undesired; When the liquid level of white water chest 1 was lower than the low level setting value, control valve 11 unlatchings this moment were through reducing the turbid amount of filtrate of sending outside of turbid filtrate pump 7; Turbid filtrating in the turbid reservoir 2 flows in the white water chest 1 outlet white water pump 6 through the contact pipeline; Reduce the plain boiled water discharge of white water chest 1, improve the liquid level of white water chest 1, keep the stable operation of system.If this moment, system still can not stable operation, through reducing the flow of ultra clear filtrate pump 10, clear filtrate pump 9, or come the level stability of regulating system, thereby keep the stable operation of system through unlatching control valve 12～14.
Through actual motion test, the fiber recovery in the plain boiled water of five paper machines is greater than 90%, and the plain boiled water reclamation rate is greater than 85%, and water saving, emission reduction effect are fairly obvious.
Embodiment 2:
White water chest 1 is delivered in a unnecessary plain boiled water collection of paper machine; The plain boiled water that white water chest 1 is collected; Deliver to many disc vacuum filter 5 filtration treatment through white water pump 6, plain boiled water added the bed course slurry before advancing many disc vacuum filters 5, and the bed course slurry derives from the slurry after this paper machine making beating; Slurry is planted and is sulfate needlebush wood pulp; Beating degree is 35 ° of SR, and the white water consistency that adds the many disc vacuum filters 5 of bed course slurry back entering is 0.35 wt%, and the slurry of recovery is sent to this paper machine and uses as the slurry after pulling an oar.Plain boiled water just is divided into turbid filtrating, clear filtrate, ultra clear filtrate through many disc vacuum filter 5 filtrate filtered by concentration, and filtrate volume is than being 25 parts of turbid filtratings, 60 parts of clear filtrates, 10 parts of ultra clear filtrates.Turbid filtrating through turbid filtrate discharge pipe advance turbid reservoir 2, clear filtrate through the clear filtrate delivery pipe enter clear filtrate pond 3, ultra clear filtrate enters ultra clear filtrate pond 4 through ultra clear filtrate delivery pipe; The filtrate discharge tube inlet end of many disc vacuum filters 5 is 7m with vertical setting height(from bottom) between turbid reservoir 2, clear filtrate pond 3, the ultra clear filtrate pond 4 the highest liquid levels, and vacuum was 0.033Mpa when many disc vacuum filters 5 filtered plain boiled waters.Turbid filtrating is joined the slurry slurry and is transferred dense water through replenishing white water pump 8 and return that many disc vacuum filters 5 filter and/or being sent to through turbid filtrate pump 7; Clear filtrate send slip house pulp washing water and/or many disc vacuum filters stripping slurry water through clear filtrate pump 9; Ultra clear filtrate gives low pressure spray and/or chemical production thinned water in this paper machine production through ultra clear filtrate pump 10, substitutes clear water and uses.
When fluctuation appears in paper machine production; When the liquid level of white water chest 1 was lower than the low level setting value, control valve 11 unlatchings this moment were through reducing the turbid amount of filtrate of sending outside of turbid filtrate pump 7; Turbid filtrating in the turbid reservoir 2 flows in the white water chest 1 outlet white water pump 6 through the contact pipeline; Reduce the plain boiled water discharge of white water chest 1, improve the liquid level of white water chest 1, keep the stable operation of system.If this moment, system still can not stable operation, through reducing the flow of ultra clear filtrate pump 10, clear filtrate pump 9, or come the level stability of regulating system, thereby keep the stable operation of system through unlatching control valve 12～14.
Through actual motion test, the fiber recovery in the plain boiled water of paper machine is greater than 92%, and the plain boiled water reclamation rate is greater than 90%, and water saving, emission reduction effect are fairly obvious.
Embodiment 3:
The plain boiled water separate collection of three paper machines is delivered to white water chest 1; The plain boiled water that white water chest 1 is collected; Deliver to many disc vacuum filter 5 filtration treatment through white water pump 6, plain boiled water added the bed course slurry before advancing many disc vacuum filters 5, and the bed course slurry derives from arbitrary paper machine wherein; Slurry is planted and is sulfate needlebush wood pulp; Beating degree is 30 ° of SR, and the white water consistency that adding bed course slurry back gets into many disc vacuum filters 5 is 0.5%, and the slurry of recovery is sent to bed course and starches arbitrary paper machine as the slurry use after pulling an oar.Plain boiled water just is divided into turbid filtrating, clear filtrate, ultra clear filtrate through many disc vacuum filter 5 filtrate filtered by concentration, and filtrate volume is than being 35 parts of turbid filtratings, 50 parts of clear filtrates, 20 parts of ultra clear filtrates.Turbid filtrating through turbid filtrate discharge pipe advance turbid reservoir 2, clear filtrate through the clear filtrate delivery pipe enter clear filtrate pond 3, ultra clear filtrate enters ultra clear filtrate pond 4 through ultra clear filtrate delivery pipe; The filtrate discharge tube inlet end of many disc vacuum filters 5 is 7.5m with vertical setting height(from bottom) between turbid reservoir 2, clear filtrate pond 3, the ultra clear filtrate pond 4 the highest liquid levels, and vacuum was 0.017Mpa when many disc vacuum filters 5 filtered plain boiled waters.Turbid filtrating is returned many disc vacuum filters 5 through additional white water pump 8 and is filtered and/or be sent to slip house through turbid filtrate pump 7 and send slurry to transfer dense water; Clear filtrate send slip house pulp washing water and/or many disc vacuum filters stripping slurry water through clear filtrate pump 9; Ultra clear filtrate send the workshop as spray of the low pressure in the paper-making process and/or chemical production thinned water through ultra clear filtrate pump 10, substitutes clear water and uses.
When wherein part paper machine is shut down or moved when undesired; When the liquid level of white water chest 1 was lower than the low level setting value, control valve 11 unlatchings this moment were through reducing the turbid amount of filtrate of sending outside of turbid filtrate pump 7; Turbid filtrating in the turbid reservoir 2 flows in the white water chest 1 outlet white water pump 6 through the contact pipeline; Reduce the plain boiled water discharge of white water chest 1, improve the liquid level of white water chest 1, keep the stable operation of system.If this moment, system still can not stable operation, through reducing the flow of ultra clear filtrate pump 10, clear filtrate pump 9, or come the level stability of regulating system, thereby keep the stable operation of system through unlatching control valve 12～14.
Through actual motion test, the fiber recovery in the plain boiled water of three paper machines is greater than 93%, and the plain boiled water reclamation rate is greater than 88%, and water saving, emission reduction effect are fairly obvious.
Certainly, also can in spirit of the present invention, change other process conditions, have same effect, so do not repeat.
Claims (3)
1. paper waste recycle method may further comprise the steps:
Step 1, the plain boiled water of paper machine is delivered to white water chest collect;
Step 2, with the plain boiled water that the step 1 white water chest is collected, be pumped to many disc vacuum filters filtration treatment, plain boiled water added the bed course slurry before advancing many disc vacuum filters;
Step 3, will separate into turbid filtrating, clear filtrate and ultra clear filtrate through the filtrating of the plain boiled water after many disc vacuum filters filter;
Step 4, the separating obtained turbid filtrating of step 3 is returned many disc vacuum filters filter and/or send the slurry industrial water, clear filtrate is as slurry industrial water and/or many disc vacuum filters stripping slurry water, and ultra clear filtrate substitutes the clear water use,
It is characterized in that: the plain boiled water of the paper machine in the step 1 derives from the paper machine more than; The turbid filtrating feed tube of band fluid level controller is housed before the white water chest outlet white water pump; The turbid filtrating that step 3 is filtered through many disc vacuum filters advances that turbid reservoir, clear filtrate are entered the clear filtrate pond, ultra clear filtrate enters ultra clear filtrate pond; Be connected to communicating pipe between clear filtrate pond and the turbid reservoir; Clear filtrate can be connected to communicating pipe between ultra clear filtrate pond and the clear filtrate pond through flowing into turbid reservoir communicating pipe, and ultra clear filtrate can flow into the clear filtrate pond through communicating pipe; Turbid reservoir, clear filtrate pond, ultra clear filtrate pond are connected to the clear water water inlet pipe of band fluid level controller respectively;
The bed course slurry that adds is sulfate needlebush wood pulp, and beating degree is 30～35
0SR, the white water consistency that adds the many disc vacuum filters of bed course slurry back entering is 0.35wt%～0.5wt%;
Vacuum was 0.017～0.033Mpa when many disc vacuum filters filtered plain boiled water;
The filtrate discharge tube inlet end of many disc vacuum filters is not less than 7m with vertical setting height(from bottom) between turbid reservoir, clear filtrate pond, the highest liquid level in ultra clear filtrate pond, on the filtrate discharge pipe of many disc vacuum filters, is provided with the vacuum control valve with atmosphere.
2. paper waste recycle method according to claim 1 is characterized in that: plain boiled water through many disc vacuum filters filtrate filtered volume ratio is: 25～35 parts of turbid filtratings, 50～60 parts of clear filtrates, 10～20 parts of ultra clear filtrates.
3. paper waste recycle method according to claim 1 and 2 is characterized in that: ultra clear filtrate is as the low pressure spray and/or the chemical production thinned water of paper-making process.
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| AT511978B1 (en) * | 2011-10-04 | 2013-06-15 | Andritz Ag Maschf | METHOD AND DEVICE FOR THE ENERGY EFFICIENT RESOLUTION OF FIBROUS MATERIALS USING HEAT PUMP SYSTEMS |
| CN103055581A (en) * | 2012-12-16 | 2013-04-24 | 中冶美利浆纸有限公司 | Vacuum collecting device for multiple-disk filter |
| CN103041638A (en) * | 2012-12-16 | 2013-04-17 | 中冶美利浆纸有限公司 | Novel multi-disk filter clear and turbid filtrate tank |
| CN104005250B (en) * | 2013-02-26 | 2016-12-28 | 南京林业大学 | The minimizing technology of starch chaff interference in a kind of OCC raw material mthod of white water from paper making |
| CN103172196A (en) * | 2013-02-27 | 2013-06-26 | 广东省金叶烟草薄片技术开发有限公司 | Treatment and recycling technology of white water in production of paper-making reconstituted tobacco |
| CN103726387B (en) * | 2014-01-11 | 2016-05-18 | 金东纸业（江苏）股份有限公司 | Paper machine water-saving system and method |
| CN106186590A (en) * | 2014-10-24 | 2016-12-07 | 吴小再 | The Multistage settling processing system of paper waste |
| 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 |
| CN104594093B (en) * | 2014-12-19 | 2016-10-12 | 金东纸业（江苏）股份有限公司 | A kind of water circulation system of paper-making pulping process |
| CN108178365B (en) * | 2017-11-28 | 2020-11-06 | 玖龙纸业（东莞）有限公司 | Surface glue reuse water deodorizing device |
| CN108252149A (en) * | 2017-12-25 | 2018-07-06 | 江苏理文造纸有限公司 | A kind of papermaking green end water imitates method for improving |
| CN109056405A (en) * | 2018-10-29 | 2018-12-21 | 芬欧汇川(中国)有限公司 | Paper machine system |
| CN117779510B (en) * | 2024-02-26 | 2024-05-31 | 山东科迈生物制浆有限公司 | Multi-disc cushion slurry for recycling fine fibers, preparation method and application |
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| US5352332A (en) * | 1991-01-28 | 1994-10-04 | Maples Gerald E | Process for recycling bleach plant filtrate |
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