CN114086420A - Method for deep chemical treatment of papermaking wastewater sludge and use method - Google Patents
Method for deep chemical treatment of papermaking wastewater sludge and use method Download PDFInfo
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- CN114086420A CN114086420A CN202111516827.4A CN202111516827A CN114086420A CN 114086420 A CN114086420 A CN 114086420A CN 202111516827 A CN202111516827 A CN 202111516827A CN 114086420 A CN114086420 A CN 114086420A
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- paper
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- water filtering
- pulp
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/01—Waste products, e.g. sludge
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/005—Microorganisms or enzymes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
Abstract
The invention discloses a method for deeply and chemically treating paper-making wastewater sludge and a using method thereof, wherein a paper machine production line sequentially carries out pulp scattering, impurity removal, fine pulp, pulping and additive mixing, pulp making and mixed pulp is subjected to a paper material delivering stage, paper material is delivered to a sludge reaction tank, water filtering enzyme is added, then stirring is carried out, the reaction temperature is 30-60 ℃, the reaction time is 40-70 minutes, after the water filtering enzyme acts, the paper material enters a net part stage, a flow-assisting and filter-assisting agent is added, the reaction temperature is 30-60 ℃, the reaction time is 10-25 seconds, and finally paper is coiled after a pressing part, a drying part, surface sizing, a drying part and calendaring. The water filtering enzyme is added into the reaction tank, so that part of fine fibers and water-soluble colloid can be clarified, and the cellulose of fiber cell walls is degraded, so that the peeling of the cell walls is facilitated, the swelling and interweaving capacity of the fibers is increased, and the water filtering and dehydrating capacity is improved.
Description
Technical Field
The invention relates to the technical field of papermaking sludge treatment, in particular to a method for deeply and chemically treating papermaking wastewater sludge and a using method thereof.
Background
A paper mill is a plant that produces paper in the form of a machine line. Paper making is divided into two forms, machine-made and manual. The mechanism is continuously carried out on a paper machine, pulp suitable for paper quality is diluted to certain concentration by water, and is primarily dewatered at a wire part of the paper machine to form a wet paper sheet, and then the wet paper sheet is pressed for dewatering and then dried to form paper. Manually, the fibers dispersed and suspended in water are made into wet paper sheets by a frame with a bamboo curtain, a polyester net or a copper net, and the wet paper sheets are pressed, dehydrated and dried in the sun or dried to form paper.
Present papermaking back mud discharges more troublesome, because there are multiple organic matter in the mud, consequently environmental protection department requires to pass through the processing back, and cod can discharge up to standard, because the mud granule is tiny, has the residue of multiple chemical auxiliary agent, and water retention is good, and difficult drying consequently handles very difficult, and present treatment cost is very high, and handles the back, can't use as the raw materials.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for deeply and chemically treating papermaking wastewater and sludge and a using method thereof, which have the advantages of improving the water filtering and dehydrating capacity of slurry and the like, and solve the problem of difficult sludge treatment.
(II) technical scheme
In order to realize the purpose of difficult sludge treatment, the invention provides the following technical scheme: a method for deeply and chemically treating papermaking wastewater sludge comprises the following steps:
s1, sequentially carrying out pulp dispersing, impurity removing, fine pulp, pulping and additive mixing on a paper machine assembly line;
s2, carrying out paper material flowing stage on the pulp after pulping and mixing;
s3, feeding the paper material flow to a sludge reaction tank, and adding water filtering enzyme;
s4, stirring, mixing and reacting at the temperature of 30-60 ℃ for 40-70 minutes;
s5, after the action of the water filtering enzyme, the paper material enters a net part stage;
s6, adding a flow aid and a filter aid, and reacting at the reaction temperature of 30-60 ℃ for 10-25 seconds;
s7, finally, sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring, and then reeling into paper;
s8, the sludge in the reaction tank is rolled into paper after sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring.
In a preferred embodiment of the present invention, the drainage enzyme is composed of cellulase, hemicellulase and pentosanase.
As a preferable technical scheme of the invention, the retention and drainage aid consists of carboxymethyl chitin, polyaluminium chloride and bentonite.
A use method of sludge for advanced chemical treatment of papermaking wastewater comprises the following steps:
s1, dewatering the treated sludge in the reaction tank through a squeezing part and a drying part;
s2, drying again after surface sizing, and performing calendaring by using calendaring equipment;
and S3, finally, coiling the paper.
(III) advantageous effects
Compared with the prior art, the invention provides a method for deeply and chemically treating papermaking wastewater and sludge and a using method thereof, and the method has the following beneficial effects:
1. according to the method for deeply and chemically treating the papermaking wastewater and sludge and the using method, part of fine fibers and water-soluble colloid can be clarified by adding the water filtering enzyme into the reaction tank, and the peeling of cell walls is facilitated by degrading cellulose of fiber cell walls, so that the swelling and interweaving capacity of the fibers is increased, and the water filtering and dewatering capacity is improved.
2. According to the method for deeply and chemically treating the papermaking wastewater sludge and the using method, after the action of the water filtering enzyme is performed, the retention and drainage aid is added, so that the slurry is reacted at the net part, the tiny particles can conveniently form particle clusters, the retention rate is improved, and the dehydration effect of wet paper sheets can also be effectively improved.
3. This method and application method of degree of depth chemical treatment papermaking waste water mud, mud in the reaction tank is because the specificity of itself and mud are the papermaking raw materials originally, through carry out drainage to reaction tank mud and handle the back, let the convenient filtering of water of mud, directly let mud become the raw materials and can carry out papermaking and use, on the mode that the organic matter discharged again among the processing mud among the contrast prior art, carry out waste utilization to mud on the mode more environmental protection and advance, and mud is used for the manufacturing of relevant product, promote physical strength, be worth promoting.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
a method for deeply and chemically treating papermaking wastewater sludge comprises the following steps:
s1, sequentially carrying out pulp dispersing, impurity removing, fine pulp, pulping and additive mixing on a paper machine assembly line;
s2, carrying out paper material flowing stage on the pulp after pulping and mixing;
s3, after the paper material flow is sent to a sludge reaction tank, adding a water filtering enzyme, wherein the water filtering enzyme consists of cellulase, hemicellulase and pentosanase, and the water filtering enzyme prepared from the cellulase, the hemicellulase and the pentosanase is helpful for stripping cell walls;
s4, stirring, mixing and reacting at the temperature of 30 ℃ for 40 minutes;
s5, after the action of the water filtering enzyme, the paper material enters a net part stage;
s6, adding a flow-aiding and filter aid to react, wherein the reaction temperature is 30 ℃, the reaction time is 10 seconds, the retention and filter aid consists of carboxymethyl chitin, polyaluminium chloride and bentonite, and the retention and filter aid prepared from the carboxymethyl chitin, the polyaluminium chloride and the bentonite not only can facilitate the formation of particle clusters of micro particles, but also can improve the forming rate;
s7, finally, sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring, and then reeling into paper;
s8, the sludge in the reaction tank is rolled into paper after sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring.
A use method of sludge for advanced chemical treatment of papermaking wastewater comprises the following steps:
s1, dewatering the treated sludge in the reaction tank through a squeezing part and a drying part;
s2, drying again after surface sizing, and performing calendaring by using calendaring equipment;
and S3, finally, coiling the paper.
Example two:
a method for deeply and chemically treating papermaking wastewater sludge comprises the following steps:
s1, sequentially carrying out pulp dispersing, impurity removing, fine pulp, pulping and additive mixing on a paper machine assembly line;
s2, carrying out paper material flowing stage on the pulp after pulping and mixing;
s3, after the paper material flow is sent to a sludge reaction tank, adding a water filtering enzyme, wherein the water filtering enzyme consists of cellulase, hemicellulase and pentosanase, and the water filtering enzyme prepared from the cellulase, the hemicellulase and the pentosanase is helpful for stripping cell walls;
s4, stirring, mixing and reacting at 40 ℃ for 50 minutes;
s5, after the action of the water filtering enzyme, the paper material enters a net part stage;
s6, adding a flow-aiding and filter aid to react, wherein the reaction temperature is 40 ℃, the reaction time is 15 seconds, the retention and filter aid consists of carboxymethyl chitin, polyaluminium chloride and bentonite, and the retention and filter aid prepared from the carboxymethyl chitin, the polyaluminium chloride and the bentonite not only can facilitate the formation of particle clusters of micro particles, but also can improve the forming rate;
s7, finally, sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring, and then reeling into paper;
s8, the sludge in the reaction tank is rolled into paper after sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring.
A use method of sludge for advanced chemical treatment of papermaking wastewater comprises the following steps:
s1, dewatering the treated sludge in the reaction tank through a squeezing part and a drying part;
s2, drying again after surface sizing, and performing calendaring by using calendaring equipment;
and S3, finally, coiling the paper.
Example three:
a method for deeply and chemically treating papermaking wastewater sludge comprises the following steps:
s1, sequentially carrying out pulp dispersing, impurity removing, fine pulp, pulping and additive mixing on a paper machine assembly line;
s2, carrying out paper material flowing stage on the pulp after pulping and mixing;
s3, after the paper material flow is sent to a sludge reaction tank, adding a water filtering enzyme, wherein the water filtering enzyme consists of cellulase, hemicellulase and pentosanase, and the water filtering enzyme prepared from the cellulase, the hemicellulase and the pentosanase is helpful for stripping cell walls;
s4, stirring, mixing and reacting at the temperature of 50 ℃ for 60 minutes;
s5, after the action of the water filtering enzyme, the paper material enters a net part stage;
s6, adding a flow-aiding and filter aid to react, wherein the reaction temperature is 50 ℃, the reaction time is 20 seconds, the retention and filter aid consists of carboxymethyl chitin, polyaluminium chloride and bentonite, and the retention and filter aid prepared from the carboxymethyl chitin, the polyaluminium chloride and the bentonite not only can facilitate the formation of particle clusters of micro particles, but also can improve the forming rate;
s7, finally, sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring, and then reeling into paper;
s8, the sludge in the reaction tank is rolled into paper after sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring.
A use method of sludge for advanced chemical treatment of papermaking wastewater comprises the following steps:
s1, dewatering the treated sludge in the reaction tank through a squeezing part and a drying part;
s2, drying again after surface sizing, and performing calendaring by using calendaring equipment;
and S3, finally, coiling the paper.
Example four:
a method for deeply and chemically treating papermaking wastewater sludge comprises the following steps:
s1, sequentially carrying out pulp dispersing, impurity removing, fine pulp, pulping and additive mixing on a paper machine assembly line;
s2, carrying out paper material flowing stage on the pulp after pulping and mixing;
s3, after the paper material flow is sent to a sludge reaction tank, adding a water filtering enzyme, wherein the water filtering enzyme consists of cellulase, hemicellulase and pentosanase, and the water filtering enzyme prepared from the cellulase, the hemicellulase and the pentosanase is helpful for stripping cell walls;
s4, stirring, mixing and reacting at the temperature of 60 ℃ for 70 minutes;
s5, after the action of the water filtering enzyme, the paper material enters a net part stage;
s6, adding a flow-aiding and filter aid to react, wherein the reaction temperature is 60 ℃, the reaction time is 25 seconds, the retention and filter aid consists of carboxymethyl chitin, polyaluminium chloride and bentonite, and the retention and filter aid prepared from the carboxymethyl chitin, the polyaluminium chloride and the bentonite not only can facilitate the formation of particle clusters of micro particles, but also can improve the forming rate;
s7, finally, sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring, and then reeling into paper;
s8, the sludge in the reaction tank is rolled into paper after sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring.
A use method of sludge for advanced chemical treatment of papermaking wastewater comprises the following steps:
s1, dewatering the treated sludge in the reaction tank through a squeezing part and a drying part;
s2, drying again after surface sizing, and performing calendaring by using calendaring equipment;
and S3, finally, coiling the paper.
The above practice proves that: after adding the water filtering enzyme, the reaction temperature of the slurry in a reaction tank is 30 ℃, the reaction time is 40 minutes, then the reaction temperature of the slurry is 30 ℃ after adding the flow-aiding and filter-aid agent, and the reaction time is 10 seconds, so that the water filtering property does not reach the standard, and the quality is unstable; after adding the water filtering enzyme, the reaction temperature of the slurry in the reaction tank is 40 ℃, the reaction time is 50 minutes, then the reaction temperature of the slurry is 40 ℃, and the reaction time is 15 seconds, so that the water filtering property is optimal, and the quality is stable; after adding the water filtering enzyme, the reaction temperature of the slurry in a reaction tank is 50 ℃, the reaction time is 60 minutes, then the reaction temperature of the slurry is 50 ℃, and the reaction time is 20 seconds, the water filtering property does not reach the standard, and the product quality is unstable; after the water filtering enzyme is added, the reaction temperature of the slurry in the reaction tank is 60 ℃, the reaction time is 70 minutes, then the reaction temperature of the flow-aiding and filter-aid agent is 60 ℃, and the reaction time is 25 seconds, so that the water filtering performance is optimal, the quality is stable, and the method comprises the following steps: after the water filtering enzyme is added, the reaction temperature of the slurry in the reaction tank is 40 ℃, the reaction time is 50 minutes, then the reaction temperature of the flow aid and filter aid is 40 ℃, and the reaction time is 15 seconds, so that the water filtering effect is optimal, and the stable product quality can be ensured, thereby being an optimal scheme.
The principle and the effect of the invention are as follows: in the process of paper material drifting, fine fibers and water-soluble colloid of part can be clear by adding water filtering enzyme into a reaction tank, cellulose of fiber cell walls is degraded, the peeling of the cell walls is facilitated, the fiber swelling and interweaving capacity is increased, the water filtering and dehydrating capacity is improved, after the water filtering enzyme acts, a retention and drainage aid is added, the pulp reacts at a net part, small particles can be conveniently formed into particle groups, the retention rate is improved, the dehydrating effect of wet paper sheets is also effectively improved, in addition, the full water filtering effect is utilized, the water of the sludge is conveniently filtered, the sludge is directly used as a raw material, the sludge does not need to be discharged, the paper is directly manufactured, and the manufactured paper is packaging paper and is used for manufacturing related products such as raw paper corrugated box board paper.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The method for deeply and chemically treating the paper-making wastewater sludge is characterized by comprising the following steps of:
s1, sequentially carrying out pulp dispersing, impurity removing, fine pulp, pulping and additive mixing on a paper machine assembly line;
s2, carrying out paper material flowing stage on the pulp after pulping and mixing;
s3, feeding the paper material flow to a sludge reaction tank, and adding water filtering enzyme;
s4, stirring, mixing and reacting at the temperature of 30-60 ℃ for 40-70 minutes;
s5, after the action of the water filtering enzyme, the paper material enters a net part stage;
s6, adding a flow aid and a filter aid, and reacting at the reaction temperature of 30-60 ℃ for 10-25 seconds;
s7, finally, sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring, and then reeling into paper;
s8, the sludge in the reaction tank is rolled into paper after sequentially passing through a pressing part, a drying part, surface sizing, a drying part and calendaring.
2. The method for deeply and chemically treating the sludge generated in the paper-making wastewater as claimed in claim 1, wherein the drainage enzyme is composed of cellulase, hemicellulase and pentosanase.
3. The method for deeply and chemically treating the sludge generated in the paper-making wastewater as claimed in claim 1, wherein the retention and drainage aids are composed of carboxymethyl chitin, polyaluminium chloride and bentonite.
4. The application method of the sludge for the deep chemical treatment of the papermaking wastewater is characterized by comprising the following steps:
s1, dewatering the treated sludge in the reaction tank through a squeezing part and a drying part;
s2, drying again after surface sizing, and performing calendaring by using calendaring equipment;
and S3, finally, coiling the paper.
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Citations (7)
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2021
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| CN105780564A (en) * | 2016-03-29 | 2016-07-20 | 山东贵和显星纸业有限公司 | Technology for producing high-strength cardboard paper from waste carton boxes |
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Application publication date: 20220225 |