CN104310683A - Development and control method of papermaking wastewater - Google Patents
Development and control method of papermaking wastewater Download PDFInfo
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- CN104310683A CN104310683A CN201410507595.XA CN201410507595A CN104310683A CN 104310683 A CN104310683 A CN 104310683A CN 201410507595 A CN201410507595 A CN 201410507595A CN 104310683 A CN104310683 A CN 104310683A
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Abstract
The invention discloses a development and control method of papermaking wastewater. A development and control process of the papermaking wastewater comprises the following steps: discharging black liquor from a black liquor drain outlet, introducing the black liquor which is treated in a desilting ditch into an adjusting tank, pumping the black liquor which is subjected to sufficient precipitation and adjustment into a stirrer in which an aluminum sulfate solution is added from a high-level dosing slot, starting the stirrer to stir, converting residual alkali in the black liquor and the aluminum sulfate solution into aluminum hydroxide after a pH value is 3, starting a centrifugal machine to separate out white crystal aluminum hydroxide, and performing filer pressing to obtain dehydrated lignin, concentrating the dehydrated lignin into pectin products with different concentrations, drying by using the produced vapor and reducing the utilized vapor into cooling water for recycling. The development and control method disclosed by the invention adopts a novel sectional comprehensive treatment process, is scientific and reasonable in process, complete in wastewater treatment, and capable of realizing total recycle and zero discharge and solving secondary pollution; and moreover, the products with relatively high values are developed, so that the waste is changed into things of value, and thus, the production cost is greatly lowered.
Description
Technical field: the present invention relates to one and be applicable to grass, wood pulp papermaking, a kind of papermaking wastewater exploitation and control method of alkaline process, imido method, sub-sodium method, lime process pulping.
Background technology: though there is multiple papermaking process in China, straw pulp alkali paper-making still accounts for the overwhelming majority.These years due to the requirement of environment protection, the sewage that this papermaking produces well is not administered, and causes and causes serious pollution, and be forced to use wood pulp papermaking.The alkali recovery technology of the improvement pulp black liquor of Introduced From Abroad in addition, then burnt valuable xylogen in vain, and replace wealth ashes, and the flue dust of discharging and ashes cause the secondary pollution of air.This technology can only process black liquor, and a large amount of in, latter end sewage still cannot process.
China is the poor country of forest, is again the country had a large population and a few land, or large agricultural country, has abundant stalk to do paper making raw material, abandon in vain or burn unfortunately tangible.And adopt wood pulp papermaking, no matter be deforestation and make raw material forest slurrying, all trimming the feet to fit the shoes, is worthless.
Summary of the invention: the present invention provides innovation for achieving the above object and adopts novel segmentation comprehensive processing technique, and sewage disposal thoroughly recycles zero release entirely, turns waste into wealth, significantly reduces a kind of papermaking wastewater exploitation and control method of production cost application.
The object of the invention is to be achieved through the following technical solutions:
(1) its black liquor exploitation and control technique is:
1. black liquor is discharged from black liquor sewage draining exit, after the process of desilting ditch, enter black liquor store up pond, after fully precipitating, with sump pump by its suction agitator, alum liquor joins in agitator by sump pump simultaneously, and alum liquor add-on is 1 16 of black liquor, start agitator to stir simultaneously, when pH value reaches 3, the residual alkali in black liquor and alum liquor chemical combination are aluminium hydroxide, and xylogen is precipitated;
Adding continuously 2. along with the black liquor precipitated and alum liquor, the black liquor completing reaction flows into whizzer along the overflow weir of agitator, establishes terylene 200 order filter cloth, in whizzer after black liquor enters whizzer, whizzer starts, and first isolates white crystals body aluminium hydroxide; The liquid being mixed with xylogen is then separated, and enters into the pressure filter with gravitational settling function, obtains dehydration xylogen through press filtration; Pressure filter gravity separation reaches can after press filtration concentration, and the liquid that the liquid be press-filtered out goes out together with gravity separation flows into evaporation concentrator, is condensed into the pectin product of different concns as required; The water vapor that concentrated pectin produces carries out oven dry and utilizes, and the water vapor utilized is reduced to water coolant, then is back to production cycle water;
(2) its medium wastewater exploitation and control technique is:
1. sewage is discharged from sewage draining exit, grid are blocked through floating matter, desilting ditch is entered after the process of slurry recycling network, again after desilting ditch precipitation process, enter and reconcile pond, after fully precipitation is reconciled, with sump pump by its suction agitator, the high-order dosing tank being located at agitator upper end to sieve MAGNESIUM METAL slag powder or calcium hydroxide to stable 80 orders that add of agitator continuously, add-on is 2/1000ths of sewage, after pH value is adjusted to 12, agitator transports row with per minute 150-300, when stirring operation 3 minutes, agitator water is full, sewage after stirring spills into a heavy pond from the overflow weir of agitator, colorless and odorless clear water after one heavy pond sewage fully precipitates, overflow can enter middle water water reservoir, meet the demand of general papermaking reuse water,
2. to requiring higher reuse water, the sewage that one heavy pond can have been precipitated, with another agitator of sump pump suction, high-order dosing tank adds Tai-Ace S 150 or aluminum chloride, add-on be the sewage precipitated ten thousand/, polyacrylamide add-on is 5/10000ths of the sewage precipitated, agitator transports row with per minute 150-300, when stirring operation 3 minutes, pH value controls 7, agitator water is full, sewage spills into second pond from the overflow weir of agitator, second pond sewage has been colorless and odorless reuse clear water after fully precipitating, overflow enters water reservoir, meet the demand reuse water of any papermaking,
3. the sludge accumulation of a heavy pond and second pond is to time a certain amount of, and pond is reconciled in available sludge pump suction, to discharge drug effect residual in mud; The mud of reconciling in pond uses sludge pump suction sludge dehydration device according to accumulation in good time, and the mud completing dehydration forms mud preliminary product, carries out drying; And the desliming sewage produced after carrying out sludge dewatering return to again reconcile pond process.
The technique of its plain boiled water exploitation and control is:
1. sewage is discharged from sewage draining exit, sewage after slurry recycling network is filtered enters collecting tank, again through sump pump by its suction agitator, the high-order dosing tank being located at agitator upper end adds Tai-Ace S 150 to agitator continuously, aluminum chloride or polyacrylamide, agitator transports row with per minute 150-300, when stirring operation 3 minutes, pH value controls 7, agitator water is full, sewage spills into settling tank from the overflow weir of agitator, water water reservoir during the overflow weir in sewage autoprecipitation pond after precipitation overflows and flows into, middle water in water reservoir has been colorless and odorless clear water, the demand of any papermaking can be met,
2. the white clay of collecting tank and settling tank is with sludge pump suction from mud press filtration or gravity separator, forms white clay reuse, after press filtration or gravity separation, then define reuse water after press filtration or gravity separation dehydration.
The invention has the beneficial effects as follows: because innovation adopts novel segmentation comprehensive processing technique, craft science is reasonable, sewage disposal is thorough, from black liquor to plain boiled water, achieve solid-liquid entirely recycle zero release, namely solve secondary pollution, do not affect again the preparation quality of paper, the cost of value of the product far above controlling input of the higher-value developed and the value of papermaking, turn waste into wealth, thus significantly reduce production cost.
Accompanying drawing illustrates: Fig. 1 is black liquor exploitation and control process flow sheet of the present invention
Fig. 2 is medium wastewater governance flowchart figure of the present invention
Fig. 3 is plain boiled water exploitation and control process flow sheet of the present invention
Embodiment: embodiment 1: as shown in Figure 1, (one) its black liquor exploitation and control technique is:
1. black liquor is discharged from black liquor sewage draining exit, after the process of desilting ditch, enter black liquor store up pond, after fully precipitating, with sump pump by its suction agitator, alum liquor joins in agitator by sump pump simultaneously, and alum liquor add-on is 1 16 of black liquor, start agitator to stir simultaneously, when pH value reaches 3, the residual alkali in black liquor and alum liquor chemical combination are aluminium hydroxide, and xylogen is precipitated;
Adding continuously 2. along with the black liquor precipitated and alum liquor, the black liquor completing reaction flows into whizzer along the overflow weir of agitator, establishes terylene 200 order filter cloth, in whizzer after black liquor enters whizzer, whizzer starts, and first isolates white crystals body aluminium hydroxide; The liquid being mixed with xylogen is then separated, and enters into the pressure filter with gravitational settling function, obtains dehydration xylogen through press filtration; Pressure filter gravity separation reaches can after press filtration concentration, and the liquid that the liquid be press-filtered out goes out together with gravity separation flows into evaporation concentrator, is condensed into the pectin product of different concns as required; Without this ability or be reluctant that returned enterprise directly can enter middle section water, after dilution degraded and middle section water handle together as reuse water; The water vapor that concentrated pectin produces carries out oven dry and utilizes, and the water vapor utilized is reduced to water coolant, then is back to production cycle water.
Embodiment 2: as shown in Figure 2, (two) its medium wastewater exploitation and control technique is:
1. sewage is discharged from sewage draining exit, grid are blocked through floating matter, desilting ditch is entered after the process of slurry recycling network, again after desilting ditch precipitation process, enter and reconcile pond, after fully precipitation is reconciled, with sump pump by its suction agitator, the high-order dosing tank being located at agitator upper end to sieve MAGNESIUM METAL slag powder or calcium hydroxide to stable 80 orders that add of agitator continuously, add-on is 2/1000ths of sewage, after pH value is adjusted to 12, agitator transports row with per minute 150-300, when stirring operation 3 minutes, agitator water is full, sewage after stirring spills into a heavy pond from the overflow weir of agitator, colorless and odorless clear water after one heavy pond sewage fully precipitates, overflow can enter middle water water reservoir, meet the demand of general papermaking reuse water,
2. to requiring higher reuse water, the sewage that one heavy pond can have been precipitated, with another agitator of sump pump suction, high-order dosing tank adds Tai-Ace S 150 or aluminum chloride, add-on be the sewage precipitated ten thousand/, polyacrylamide add-on is 5/10000ths of the sewage precipitated, agitator transports row with per minute 150-300, when stirring operation 3 minutes, pH value controls 7, agitator water is full, sewage spills into second pond from the overflow weir of agitator, second pond sewage has been colorless and odorless reuse clear water after fully precipitating, overflow enters water reservoir, meet the demand reuse water of any papermaking,
3. the sludge accumulation of a heavy pond and second pond is to time a certain amount of, and pond is reconciled in available sludge pump suction, to discharge drug effect residual in mud; The mud of reconciling in pond uses sludge pump suction sludge dehydration device according to accumulation in good time, and the mud completing dehydration forms mud preliminary product, carries out drying; And the desliming sewage produced after carrying out sludge dewatering return to again reconcile pond process.
Embodiment 3: as shown in Figure 3, the technique of its plain boiled water exploitation and control is:
1. sewage is discharged from sewage draining exit, sewage after slurry recycling network is filtered enters collecting tank, again through sump pump by its suction agitator, the high-order dosing tank being located at agitator upper end adds Tai-Ace S 150 to agitator continuously, aluminum chloride or polyacrylamide, agitator transports row with per minute 150-300, when stirring operation 3 minutes, pH value controls 7, agitator water is full, sewage spills into settling tank from the overflow weir of agitator, water water reservoir during the overflow weir in sewage autoprecipitation pond after precipitation overflows and flows into, middle water in water reservoir has been colorless and odorless clear water, the demand of any papermaking can be met,
2. white clay sludge pump suction white clay press filtration or the gravity separator of collecting tank and settling tank, forms white clay reuse, after press filtration or gravity separation, then defines reuse water after press filtration or gravity separation dehydration.
Embodiment 4: as shown in Figure 1, Figure 2, Figure 3 shows, it can enter middle section water without the plain boiled water reclaimed and process, and should not be used to clean black liquor, in case cause adverse influence to black liquor recovery.
Embodiment 5: as shown in Figure 1, its white crystals body aluminium hydroxide, can be used as industrial goods, also can use by oneself, and its market price is generally more than 3 times of Tai-Ace S 150.
The xylogen that is press-filtered out is dried after pulverizing 120 order sieves, and can be used for the strengthening agent of rubber industry, part replaces high abrasion carbon black, has good physical and chemical stability, and lightweight, resistance to stretching is drawn, added the good advantage of a little performance.
Concentrate out the pectin product of different concns, be the natural phant pectin without chemical composition, environmental protection, can be used for the bonding coating of wood working, building materials, ceramic bonding, can replace the chemical resin glue widely adopted, without chemical pollution.
Embodiment 6: as shown in Figure 1, the Treatment process of its medium wastewater and plain boiled water is also applicable to the process of recycled writing paper sewage disposal, multiple industrial sewage and sanitary sewage disposal, rivers composite wastewater.
Embodiment 7: as shown in Figure 1 and Figure 2, the capacity of reconciling pond is the quantity discharged of a production cycle more than; The capacity in a heavy pond and No. two heavy ponds is the quantity discharged of one-period; The capacity of agitator is produce the blowdown flow rate amount of 3 minutes.
Claims (3)
1. a papermaking wastewater exploitation and control method, is characterized in that:
(1) its black liquor exploitation and control technique is:
1. black liquor is discharged from black liquor sewage draining exit, after the process of desilting ditch, enter black liquor store up pond, after fully precipitating, with sump pump by its suction agitator, alum liquor joins in agitator by sump pump simultaneously, and alum liquor add-on is 1 16 of black liquor, start agitator to stir simultaneously, when pH value reaches 3, the residual alkali in black liquor and alum liquor chemical combination are aluminium hydroxide, and xylogen is precipitated;
Adding continuously 2. along with the black liquor precipitated and alum liquor, the black liquor completing reaction flows into whizzer along the overflow weir of agitator, establishes terylene 200 order filter cloth, in whizzer after black liquor enters whizzer, whizzer starts, and first isolates white crystals body aluminium hydroxide; The liquid being mixed with xylogen is then separated, and enters into the pressure filter with gravitational settling function, obtains dehydration xylogen through press filtration; Pressure filter gravity separation reaches can after press filtration concentration, and the liquid that the liquid be press-filtered out goes out together with gravity separation flows into evaporation concentrator, is condensed into the pectin product of different concns as required; The water vapor that concentrated pectin produces carries out oven dry and utilizes, and the water vapor utilized is reduced to water coolant, then is back to production cycle water;
(2) its medium wastewater exploitation and control technique is:
1. sewage is discharged from sewage draining exit, grid are blocked through floating matter, desilting ditch is entered after the process of slurry recycling network, again after desilting ditch precipitation process, enter and reconcile pond, after fully precipitation is reconciled, with sump pump by its suction agitator, the high-order dosing tank being located at agitator upper end to sieve MAGNESIUM METAL slag powder or calcium hydroxide to stable 80 orders that add of agitator continuously, add-on is 2/1000ths of sewage, after pH value is adjusted to 12, agitator transports row with per minute 150-300, when stirring operation 3 minutes, agitator water is full, sewage after stirring spills into a heavy pond from the overflow weir of agitator, colorless and odorless clear water after one heavy pond sewage fully precipitates, overflow can enter middle water water reservoir, meet the demand of general papermaking reuse water,
2. to requiring higher reuse water, the sewage that one heavy pond can have been precipitated, with another agitator of sump pump suction, high-order dosing tank adds Tai-Ace S 150 or aluminum chloride, add-on be the sewage precipitated ten thousand/, polyacrylamide add-on is 5/10000ths of the sewage precipitated, agitator transports row with per minute 150-300, when stirring operation 3 minutes, pH value controls 7, agitator water is full, sewage spills into second pond from the overflow weir of agitator, second pond sewage has been colorless and odorless reuse clear water after fully precipitating, overflow enters water reservoir, meet the demand reuse water of any papermaking,
3. the sludge accumulation of a heavy pond and second pond is to time a certain amount of, and pond is reconciled in available sludge pump suction, to discharge drug effect residual in mud; The mud of reconciling in pond uses sludge pump suction sludge dehydration device according to accumulation in good time, and the mud completing dehydration forms mud preliminary product, carries out drying; And the desliming sewage produced after carrying out sludge dewatering return to again reconcile pond process.
2. a kind of papermaking wastewater exploitation and control method according to claim 1, it is characterized in that the technique of its plain boiled water exploitation and control is: 1. discharged from sewage draining exit by sewage, sewage after slurry recycling network is filtered enters collecting tank, again through sump pump by its suction agitator, the high-order dosing tank being located at agitator upper end adds Tai-Ace S 150 to agitator continuously, aluminum chloride or polyacrylamide, agitator transports row with per minute 150-300, when stirring operation 3 minutes, pH value controls 7, agitator water is full, sewage spills into settling tank from the overflow weir of agitator, water water reservoir during the overflow weir in sewage autoprecipitation pond after precipitation overflows and flows into, middle water in water reservoir has been colorless and odorless clear water, the demand of any papermaking can be met,
2. white clay sludge pump suction white clay press filtration or the gravity separator of collecting tank and settling tank, forms white clay reuse, after press filtration or gravity separation, then defines reuse water after press filtration or gravity separation dehydration.
3. a kind of papermaking wastewater exploitation and control method according to claim 1, is characterized in that can enter middle section water without the plain boiled water reclaimed processes, and should not be used to clean black liquor, in case cause adverse influence to black liquor recovery.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106915842A (en) * | 2017-03-23 | 2017-07-04 | 浙江晶鑫特种纸业有限公司 | A kind of scrap rubber processing equipment and technique |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139167A (en) * | 1996-02-02 | 1997-01-01 | 于心让 | Enclosed and semienclosed papermaking sewage treating equipment and method |
| CN1378981A (en) * | 2001-08-10 | 2002-11-13 | 林连山 | Process for treating intermediate paper-making sewage |
| US6830696B1 (en) * | 2003-12-01 | 2004-12-14 | University Of Florida Research Foundation, Inc. | Treatment of spent pulping liquor with lignin separation to recover alkali pulping chemicals in manufacture of paper pulp |
| CN1623940A (en) * | 2004-11-08 | 2005-06-08 | 彭仲辉 | Process for comprensive treating waste water of paper making by grass pulp |
| JP2007070784A (en) * | 2005-09-07 | 2007-03-22 | Ki System:Kk | Method for treating black liquor |
| CN1989292A (en) * | 2004-09-07 | 2007-06-27 | 株式会社K·I系统 | Method for black liquor treatment |
| CN103086534A (en) * | 2011-10-31 | 2013-05-08 | 金东纸业（江苏）股份有限公司 | Whitewater processing method |
-
2014
- 2014-09-18 CN CN201410507595.XA patent/CN104310683B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1139167A (en) * | 1996-02-02 | 1997-01-01 | 于心让 | Enclosed and semienclosed papermaking sewage treating equipment and method |
| CN1378981A (en) * | 2001-08-10 | 2002-11-13 | 林连山 | Process for treating intermediate paper-making sewage |
| US6830696B1 (en) * | 2003-12-01 | 2004-12-14 | University Of Florida Research Foundation, Inc. | Treatment of spent pulping liquor with lignin separation to recover alkali pulping chemicals in manufacture of paper pulp |
| CN1989292A (en) * | 2004-09-07 | 2007-06-27 | 株式会社K·I系统 | Method for black liquor treatment |
| CN1623940A (en) * | 2004-11-08 | 2005-06-08 | 彭仲辉 | Process for comprensive treating waste water of paper making by grass pulp |
| JP2007070784A (en) * | 2005-09-07 | 2007-03-22 | Ki System:Kk | Method for treating black liquor |
| CN103086534A (en) * | 2011-10-31 | 2013-05-08 | 金东纸业（江苏）股份有限公司 | Whitewater processing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106915842A (en) * | 2017-03-23 | 2017-07-04 | 浙江晶鑫特种纸业有限公司 | A kind of scrap rubber processing equipment and technique |
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