CN108642948B - Papermaking wastewater treatment process and treatment device - Google Patents
Papermaking wastewater treatment process and treatment device Download PDFInfo
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- CN108642948B CN108642948B CN201810577421.9A CN201810577421A CN108642948B CN 108642948 B CN108642948 B CN 108642948B CN 201810577421 A CN201810577421 A CN 201810577421A CN 108642948 B CN108642948 B CN 108642948B
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- papermaking
- discharge port
- desulfurizing tower
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- brick
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
- D21C11/0028—Effluents derived from the washing or bleaching plants
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0014—Combination of various pulping processes with one or several recovery systems (cross-recovery)
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
Abstract
The invention discloses a papermaking wastewater treatment process and a treatment device, which mainly comprise the steps of reacting wastewater generated in the processes of steaming, washing and bleaching of alkaline papermaking with waste gas generated in the process of firing finished bricks in a kiln furnace of a machine, and simultaneously continuously recycling aqueous solution with pH within 6-9 after the reaction for the steaming and washing process production steps in the alkaline papermaking and the machine brick blank stirring process production steps, thereby realizing the process of treating the wastewater generated in the papermaking process and the subsequent recycling process of the treated standard reaction aqueous solution; the papermaking wastewater treatment process adopted by the invention can reduce the wastewater treatment cost and realize zero discharge of the treated wastewater.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a papermaking wastewater treatment process and a wastewater treatment device.
Background
At present, the papermaking technology mainly adopts an alkaline pulping papermaking technology, a large amount of wastewater is generated in the actual production process, and a large amount of lignin is also contained in the wastewater to cause the wastewater to be black brown, so that the wastewater generated in the alkaline pulping papermaking is also called black liquor, and the wastewater is discharged into the environment to cause great pollution to the environment, so that how to treat the wastewater generated in the papermaking process is important. In the waste water generated by the alkali pulping and papermaking method, the black liquor accounts for more than 90 percent of the total discharged waste water, and the main components of the black liquor comprise: how lignin, pentose and total alkali are used for treating black liquor is a key of wastewater, wherein the total alkali accounts for most of the black liquor in wastewater, and how to treat the total alkali is a key factor for treating the black liquor. At present, industrial wastewater treatment methods are mainly divided into physical treatment methods and biochemical treatment methods, wherein the physical treatment methods comprise an air floatation method, an adsorption method, a coagulation method, an electrolytic method, a Fenton method and the like, and the biochemical treatment methods comprise: activated sludge process, biological filtration, biofilm process, anaerobic biological process, and the like.
The existing wastewater treatment methods applied to the papermaking industry mainly comprise chemical precipitation, air flotation treatment, biological oxidation and other treatment methods, and by adopting the process treatment technologies, other substances outside are needed to treat the wastewater, so that the wastewater treatment process steps are increased, the wastewater treatment cost is increased, part of water is discharged periodically, zero emission of a paper mill in the production process cannot be realized, and the problem of pollution emission still exists.
Disclosure of Invention
The invention aims at: the waste water generated in the alkaline papermaking process reacts with waste gas generated in the brick making process, the purpose of treating the waste water is achieved through the neutralization reaction of the waste water and the waste gas, and meanwhile, the solution generated in the reaction process of the waste water and the waste gas can be reused in the papermaking process and the brick making process, so that zero emission of the waste water is realized; and simultaneously, the treatment cost of papermaking wastewater and brick-making waste gas can be reduced.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a papermaking wastewater treatment process, comprising the following steps: the method comprises the steps of firstly, uniformly collecting waste water generated in the steaming, washing and bleaching processes of alkaline papermaking into a black liquor pool for storage, and connecting the waste water collected in the black liquor pool with a liquid inlet at the upper end of a desulfurizing tower; step two, connecting waste gas generated in the process of firing finished bricks in a machine brick kiln with a gas inlet of a desulfurizing tower; thirdly, the wastewater reacts with the waste gas in the desulfurizing tower, the neutralized aqueous solution with the pH value of 6-9 after neutralization is collected into a transfer pool, the neutralized aqueous solution with the pH value of 6-9 is directly circulated into a liquid inlet at the upper end of the desulfurizing tower, and the neutralized aqueous solution is circulated into the desulfurizing tower to react with the waste gas again; fourthly, collecting the neutralized aqueous solution with the pH of 6-9 after the reaction into a solution of a transfer pond, respectively using the solution in a pulping workshop of a paper mill and a blank making workshop of a brick mill, and inputting the neutralized water of the paper mill into a cooking and washing production step in a pulping process; inputting neutralizing water of a brick mill for stirring and producing raw bricks of the brick mill; wherein, the waste water generated by the paper mill is input into a black liquor pond, and the waste water generated by the machine brick blank is input into the gas inlet of the desulfurizing tower again.
On the basis of applying the papermaking wastewater treatment process, the papermaking wastewater treatment device comprises alkaline papermaking equipment, standard brick production equipment and a desulfurizing tower, and also comprises a black liquor pool and a transfer pool; wherein, the digestion device, the pulp washer, the screening device, the countercurrent washing device of the vacuum pulp washer and the waste water outlet of the bleaching device in the alkaline papermaking equipment are connected with the water inlet of the black liquor pond;
in the production equipment of the standard bricks, a waste gas outlet of a firing kiln is connected with a gas inlet of a desulfurizing tower; the water outlet of the black liquid pool is connected with the liquid water inlet of the desulfurizing tower; the liquid outflow port of the desulfurizing tower is connected with the water inlet of the transfer pond; the water outlet of the transfer pond is connected with the feed inlet of a stirring device in the standard brick production equipment; the water outlet of the transfer pond is connected with the feed inlet of a digestion device, a pulp washer, a screening device and a countercurrent washing device of a vacuum pulp washer in alkaline papermaking equipment.
Further, in the papermaking wastewater treatment device, the alkaline papermaking equipment further comprises a material preparation device, a pulp storage tower and a papermaking device; the standard brick production equipment also comprises a crushing and grinding device, a kneading device, an extrusion device and a blank cutting device;
in the alkaline papermaking equipment, a discharge port of the material preparation device is connected with a feed port of the digestion device; the discharge port of the digestion device is connected with the feed port of the pulp washer; the discharge port of the pulp washer is connected with the feed port of the screening device; the discharge port of the screening device is connected with the feed port of the countercurrent washing device of the vacuum pulp washer; the discharge port of the countercurrent washing device of the vacuum pulp washer is connected with the feed port of the bleaching device; the discharge port of the bleaching device is connected with the feed port of the pulp storage tower; the discharge port of the pulp storage tower is connected with the feed port of the papermaking device;
in the standard brick production equipment, a discharge port of the crushing and grinding device is connected with a feed port of the stirring device; the discharge port of the stirring device is connected with the feed port of the kneading device; the discharge port of the kneading device is connected with the feed port of the extrusion device; the discharge port of the extrusion device is connected with the feed port of the blank cutting device; the discharge port of the blank cutting device is connected with the feed port of the firing kiln;
preferably, a vacuum washer is used as the washer.
Preferably, the screening device is closed by a two-stage pressure screen.
Due to the adoption of the technical scheme, the invention has the beneficial effects that: the traditional alkali papermaking wastewater treatment process is changed, waste gas generated in the production process of building material machine bricks is utilized, the waste gas and wastewater generated in alkali papermaking are combined to react, and meanwhile, the PH solution reaching the standard generated after the reaction is reapplied to the papermaking production process and the machine brick blank stirring process in machine brick production, so that the treatment process of papermaking wastewater is realized, and the zero emission of wastewater is realized; meanwhile, the waste gas in the production process of the building material machine brick can reach the standard to be discharged; no external treatment substance is added in the treatment process of waste water and waste gas, so that the treatment cost of the papermaking waste water is reduced.
The papermaking wastewater treatment process utilizes waste gas generated in the production process of building material machine bricks and the process of neutralization reaction with wastewater generated in the papermaking process, wherein the wastewater generated in the alkaline pulping process is also called black liquor, the main components of the black liquor are lignin, pentose and total alkali, the total alkali accounts for most of the components of the black liquor, and the treatment of the total alkali is a very important link for treating the wastewater; the waste gas generated in the process of baking the building material machine brick into the finished brick is mainly the flue gas containing sulfur dioxide, is easy to dissolve in water, can react with the total alkali in the black liquor in the process of pulping by an alkali method, and performs a neutralization reaction on the waste water and the waste gas generated in the process of baking the building material machine brick into the finished brick, so that the total alkali in the waste water generated in the process of pulping by the alkali method is treated, and meanwhile, the neutralized aqueous solution with the PH of 6-9 after the reaction of the waste water and the waste gas in a desulfurizing tower is reused in the production of pulping workshops of a paper mill and a blank making workshop of a machine brick factory, thereby achieving the purpose of recycling the treated aqueous solution, realizing the treatment of the waste water in the process of pulping by the alkali method, simultaneously realizing zero emission of the waste water, and simultaneously enabling the waste gas in the process of producing the building material to reach the standard emission, and simultaneously reducing the treatment cost of the waste water.
Drawings
FIG. 1 is a flow chart of the papermaking wastewater treatment process of the present invention.
FIG. 2 is a view showing a papermaking wastewater treatment apparatus according to the present invention.
Reference numerals: 11-a material preparation device; 12-a cooking device; 13-a vacuum washer; 14-a two-stage pressure screen sealing and screening device; 15-a countercurrent washing device of the vacuum pulp washer; 16-bleaching means; 17-a slurry storage tower; 18-a papermaking device; 21-a crushing and grinding device; 22-stirring device; 23-kneading means; 24-an extrusion device; 25-blank cutting device; 26-firing the kiln; 1-a desulfurizing tower; 2-a black liquid pool; 3-a transfer pool; 4-alkali papermaking equipment; 5-standard brick production equipment.
Detailed Description
The invention is different from the traditional method for treating the wastewater generated in the basic papermaking process, the wastewater generated in the basic papermaking process and the waste gas generated in the production process of firing the building material machine brick into the finished brick are subjected to concentrated reaction, and the final product of the reaction of the wastewater and the waste gas is recycled, so that the zero emission of the wastewater in the papermaking process can be realized, and the cost for treating the wastewater can be reduced; meanwhile, the method can solve the problem of treatment of sulfur dioxide generated in the brick making and firing process in the actual production process, can reduce the flue gas treatment cost of the sulfur dioxide generated in the brick making and firing process, avoids adding caustic soda additionally in the sulfur dioxide treatment process, and can reduce the desulfurization treatment cost; thereby realizing the treatment of wastewater generated in the basic papermaking process and the treatment of sulfur dioxide gas generated in the brick making firing process from the two aspects; wherein the desulfurizing tower device adopted in the process is a device in the general industry, and other similar desulfurizing tower reaction devices belong to the reaction devices pointed out in the invention; the invention can be used in actual production process, and in order to make the purpose, technical scheme and advantages of the invention more clear, the technical scheme in the embodiment of the invention will be clearly and completely described below with reference to the attached drawings.
A first embodiment of the invention, see fig. 1. FIG. 1 is a process flow diagram of the whole comprehensive treatment process of waste water and waste gas, wherein the waste water treatment of the invention is combined with sulfur dioxide waste gas in the process of firing finished bricks of brickmaking, and the waste water and the waste gas are treated without adding other materials. The process method adopted by the invention is that waste water generated in the steaming, washing and bleaching processes of alkaline papermaking is uniformly collected into a black liquor pond 2 for storage, the waste water collected in the black liquor pond 2 is connected with a liquid inlet at the upper end of a desulfurizing tower 1 through a water outlet of the black liquor pond 2, and the waste water is input into the desulfurizing tower 1; step two, connecting a waste gas outlet in the machine brick kiln with a gas inlet of the desulfurizing tower 1, so that waste gas in the machine brick kiln enters the desulfurizing tower 1;
the third step is that the waste water reacts with waste gas in the desulfurizing tower 1, which is a key step for treating the waste water and the waste gas, the step is mainly that total alkali generated in the waste water in the alkaline papermaking process reacts with sulfur dioxide gas in brickmaking waste gas in an aqueous solution environment, the waste water is sprayed downwards from the top end of the desulfurizing tower 1 and fully contacts and reacts with the waste gas entering from the bottom end of the desulfurizing tower 1, the conclusion can be obtained through practical production experiments, the PH of the water solution after the neutralization reaction which is finally discharged from the desulfurizing tower 1 reaches 6-9, the neutralized water solution after the neutralization PH reaches 6-9 is collected to a transfer tank 3, the neutralized water solution which does not reach the PH of 6-9 is directly circulated to the liquid inlet at the upper end of the desulfurizing tower 1, and is circulated to the inside of the desulfurizing tower 1 to react with the waste gas again;
fourthly, collecting the neutralization aqueous solution with the pH of the reacted solution reaching 6-9 to the solution of the transfer tank 3, respectively reusing the solution in a pulping workshop of a paper mill and a blank making workshop of a brick mill, and inputting the neutralization water of the paper mill into a cooking and washing production step in the pulping process, so that the subsequent papermaking treatment process is not influenced; the neutralizing water is input into a machine brick factory and is used for a machine brick blank stirring production step, the subsequent brick making quality is not influenced in the actual production process, meanwhile, insoluble impurities such as lignin and the like in the wastewater can be stirred and combined with components in the bricks, insoluble substances in the solution can be solved, the filtering step in the common wastewater treatment process can be reduced, the link needing filtering is directly used in the brick making production process, the subsequent redundant treatment cost of the wastewater can be reduced, and the subsequent brick making factory manufacturing cost is not influenced in the actual production process; the waste water generated subsequently in the paper mill is input into the black liquor pond 2, the waste water generated by the machine brick blank is input into the gas inlet of the desulfurizing tower 1 again, and the reaction steps are repeated, so that the treatment of the waste water and the full utilization of the treated water solution can be realized, the zero emission after the waste water treatment can be realized, the waste gas generated in the brick making process can be treated, and the treatment process of the waste gas required by separately treating the sulfur dioxide waste gas in the brick making and firing process of finished bricks is reduced.
A second embodiment of the invention, reference is made to fig. 2. The invention relates to a papermaking wastewater treatment device, which is characterized in that an integral process device of an alkaline papermaking device 4 is combined with an integral process device of brick making production, firstly, the alkaline papermaking device 4 comprises a material preparation device 11, a cooking device 12, a vacuum pulp washer, a two-stage pressure screen sealing and screening device 14, a vacuum pulp washer countercurrent washing device 15, a bleaching device 16, a pulp storage tower 17 and a papermaking device 18, which are sequentially connected, namely, a material outlet of the material preparation device 11 is connected with a material inlet of the cooking device 12, a material outlet of the cooking device 12 is connected with a material inlet of the vacuum pulp washer, a material outlet of the vacuum pulp washer is connected with a material inlet of the two-stage pressure screen sealing and screening device 14, a material outlet of the two-stage pressure screen sealing and screening device 14 is connected with a material inlet of the vacuum pulp washer countercurrent washing device 15, a material outlet of the bleaching device 16 is connected with a material inlet of the pulp storage tower 17, and a material outlet of the pulp storage tower 17 is connected with a material inlet of the papermaking device 18, thus forming a complete alkaline production process; the method is characterized in that waste water generated in the production process steps of a digestion device 12, a vacuum pulp washer, a two-stage pressure screen closed screening device 14, a vacuum pulp washer countercurrent washing device 15 and a bleaching device 16 is collected into a black liquor pond 2, namely, a waste water outlet of the digestion device 12, the vacuum pulp washer, the two-stage pressure screen closed screening device 14, the vacuum pulp washer countercurrent washing device 15 and the bleaching device 16 is connected with a water inlet of the black liquor pond 2, the black liquor pond 2 is a waste water collecting pond in the alkaline papermaking process, and the collected waste water is intensively used for the subsequent treatment of the waste water;
secondly, standard brick production equipment 5 in the papermaking wastewater treatment device comprises equipment required by the whole standard finished brick production process, wherein the equipment comprises a crushing and grinding device 21, a stirring device 22, a kneading device 23, an extrusion device 24, a blank cutting device 25 and a firing kiln 26, which are sequentially connected, namely, a discharge port of the crushing and grinding device 21 is connected with a feed port of the stirring device 22, a discharge port of the stirring device 22 is connected with a feed port of the kneading device 23, a discharge port of the kneading device 23 is connected with a feed port of the extrusion device 24, a discharge port of the extrusion device 24 is connected with a feed port of the blank cutting device 25, a discharge port of the blank cutting device 25 is connected with a feed port of the firing kiln 26, waste gas generated in the firing kiln 26 is connected with a gas inlet of a desulfurizing tower 1, waste gas generated in the firing process of the brick is reacted with waste liquid generated in the papermaking process, wherein waste gas generated in the firing process of the brick is mainly acid mist gas, and main components of the waste water generated in the papermaking process are aqueous solution containing a large amount of alkaline substances, and the sulfur dioxide gas can react in the desulfurizing tower 1; the water solution with the PH reaching 6-9 after the reaction is collected in the transfer tank 3, the water solution which does not reach the PH range is input into the liquid input port of the desulfurizing tower 1 again, and enters the desulfurizing tower 1 to react with waste gas in a circulating way; the water outlet of the transfer pond 3 is connected with the feed inlet of a stirring device 22 in the standard brick production equipment 5, and the water outlet of the transfer pond 3 is connected with the feed inlets of a digestion device 12, a vacuum pulp washer, a two-stage pressure screen closed screening device 14 and a vacuum pulp washer countercurrent washing device 15 in the alkaline papermaking equipment 4; the reacted neutralizing water solution can be circularly used in the middle steaming and washing process of papermaking and can be also used in the stirring process in the standard brick production process. Through this device, with alkali method papermaking with standard brick brickmaking device combination, realize the treatment process to waste water, also can avoid the emission problem after the waste water treatment simultaneously, but the waste water circulation after will handling is used in papermaking and brickmaking's intermediate production process, can be through the cyclic utilization after to papermaking waste water treatment to realize the zero release after the waste water treatment, also can make the sulfur dioxide acid gas's that the brickmaking fired produced up to standard emission simultaneously, also can reduce waste water treatment cost simultaneously.
Claims (4)
1. A papermaking wastewater treatment process is characterized in that: the method comprises the steps of firstly, uniformly collecting waste water generated in the steaming, washing and bleaching processes of alkaline papermaking into a black liquor pool for storage, and connecting the waste water collected in the black liquor pool with a liquid inlet at the upper end of a desulfurizing tower; step two, connecting waste gas generated in the process of firing finished bricks in a machine brick kiln with a gas inlet of a desulfurizing tower;
thirdly, the wastewater reacts with the waste gas in the desulfurizing tower, the neutralized aqueous solution with the pH value of 6-9 after neutralization is collected into a transfer pool, the neutralized aqueous solution with the pH value of 6-9 is directly circulated into a liquid inlet at the upper end of the desulfurizing tower, and the neutralized aqueous solution is circulated into the desulfurizing tower to react with the waste gas again;
fourthly, collecting the neutralized aqueous solution with the pH of the reacted solution reaching 6-9 into a solution of a transfer pond, respectively using the solution in a pulping workshop of a paper mill and a blank making workshop of a brick mill for production, and inputting the neutralized water of the paper mill into a cooking and washing production step in a pulping process; inputting neutralizing water of a brick mill for stirring and producing raw bricks of the brick mill; wherein, the waste water generated by the paper mill is input into a black liquor pond, and the waste water generated by the machine brick blank is input into the gas inlet of the desulfurizing tower again;
the papermaking wastewater treatment device comprises alkaline papermaking equipment, standard brick production equipment and a desulfurizing tower, and also comprises a black liquor pond and a transfer pond;
the digestion device, the pulp washer, the screening device, the countercurrent washing device of the vacuum pulp washer and the waste water outlet of the bleaching device in the alkaline papermaking equipment are connected with the water inlet of the black liquor pond;
in the standard brick production equipment, a waste gas outlet of a firing kiln is connected with a gas inlet of a desulfurizing tower; the water outlet of the black liquid pool is connected with the liquid water inlet of the desulfurizing tower; the liquid outflow port of the desulfurizing tower is connected with the water inlet of the transfer pond; the water outlet of the transfer pond is connected with the feed inlet of a stirring device in the standard brick production equipment; the water outlet of the transfer pond is connected with the feed inlet of a digestion device, a pulp washer, a screening device and a countercurrent washing device of a vacuum pulp washer in alkaline papermaking equipment.
2. The papermaking wastewater treatment process according to claim 1, wherein: the alkaline papermaking equipment also comprises a material preparation device, a pulp storage tower and a papermaking device; the standard brick production equipment also comprises a crushing and grinding device, a kneading device, an extrusion device and a blank cutting device;
in the alkaline papermaking equipment, a discharge port of the material preparation device is connected with a feed port of the digestion device; the discharge port of the digestion device is connected with the feed port of the pulp washer; the discharge port of the pulp washer is connected with the feed port of the screening device; the discharge port of the screening device is connected with the feed port of the countercurrent washing device of the vacuum pulp washer; the discharge port of the countercurrent washing device of the vacuum pulp washer is connected with the feed port of the bleaching device; the discharge port of the bleaching device is connected with the feed port of the pulp storage tower; the discharge port of the pulp storage tower is connected with the feed port of the papermaking device;
in the standard brick production equipment, a discharge port of the crushing and grinding device is connected with a feed port of the stirring device; the discharge port of the stirring device is connected with the feed port of the kneading device; the discharge port of the kneading device is connected with the feed port of the extrusion device; the discharge port of the extrusion device is connected with the feed port of the blank cutting device; the discharge port of the blank cutting device is connected with the feed port of the firing kiln.
3. The papermaking wastewater treatment process according to claim 2, characterized in that: the pulp washer is a vacuum pulp washer.
4. A papermaking wastewater treatment process according to claim 2 or 3, characterized in that: the screening device is a two-section pressure screen closed screening device.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1253257A (en) * | 1999-12-02 | 2000-05-17 | 詹长明 | Integrated process for treating boiler fume and paper-making black liquid and its products |
| CN101628200A (en) * | 2009-08-13 | 2010-01-20 | 福建龙净脱硫脱硝工程有限公司 | Desulfurization device and desulfurization method for wastewater containing a plurality of organic pollutants |
| CN102786198A (en) * | 2012-07-19 | 2012-11-21 | 广西金桂浆纸业有限公司 | Method for slime fluidized bed boiler desulphurization of sludge and white slime of papermaking factory |
| CN106045192A (en) * | 2016-05-25 | 2016-10-26 | 江门市明星纸业有限公司 | Flue gas desulfurization wastewater treatment method |
| CN107213774A (en) * | 2017-05-15 | 2017-09-29 | 昆明理工大学 | A kind of flue gas desulfurization and resource utilization method based on smelting mine tailings |
| CN208501378U (en) * | 2018-06-07 | 2019-02-15 | 夹江县天翔纸业有限公司 | A kind of papermaking wastewater treatment device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101002996A (en) * | 2006-01-20 | 2007-07-25 | 新乡化纤股份有限公司 | Equipment and method for comprehensive treatment of sulfur-containing flue-gas |
| CN101768887B (en) * | 2010-03-17 | 2012-12-26 | 山东和润浆纸有限公司 | Circular utilization method of straw in pulping and papermaking processes |
-
2018
- 2018-06-07 CN CN201810577421.9A patent/CN108642948B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1253257A (en) * | 1999-12-02 | 2000-05-17 | 詹长明 | Integrated process for treating boiler fume and paper-making black liquid and its products |
| CN101628200A (en) * | 2009-08-13 | 2010-01-20 | 福建龙净脱硫脱硝工程有限公司 | Desulfurization device and desulfurization method for wastewater containing a plurality of organic pollutants |
| CN102786198A (en) * | 2012-07-19 | 2012-11-21 | 广西金桂浆纸业有限公司 | Method for slime fluidized bed boiler desulphurization of sludge and white slime of papermaking factory |
| CN106045192A (en) * | 2016-05-25 | 2016-10-26 | 江门市明星纸业有限公司 | Flue gas desulfurization wastewater treatment method |
| CN107213774A (en) * | 2017-05-15 | 2017-09-29 | 昆明理工大学 | A kind of flue gas desulfurization and resource utilization method based on smelting mine tailings |
| CN208501378U (en) * | 2018-06-07 | 2019-02-15 | 夹江县天翔纸业有限公司 | A kind of papermaking wastewater treatment device |
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