CN113308932A - Application method of water treatment sludge in pulping and papermaking - Google Patents
Application method of water treatment sludge in pulping and papermaking Download PDFInfo
- Publication number
- CN113308932A CN113308932A CN202110475073.6A CN202110475073A CN113308932A CN 113308932 A CN113308932 A CN 113308932A CN 202110475073 A CN202110475073 A CN 202110475073A CN 113308932 A CN113308932 A CN 113308932A
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- Prior art keywords
- sludge
- pulping
- tank
- water treatment
- papermaking
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Classifications
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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
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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)
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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
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Paper (AREA)
Abstract
The invention discloses an application method of water treatment sludge in pulping and papermaking, which comprises the following steps of firstly, screening aerobic secondary sludge through an inclined screen device to remove moisture and ash in the aerobic secondary sludge, then adding the treated sludge and primary sedimentation tank sludge into a sludge tank, fully stirring the aerobic secondary sludge and the primary sedimentation tank sludge in the sludge tank through a stirring device, adding an alkaline neutralizer while stirring, detecting the PH in the sludge tank through a PH detection device in the adding process until the PH value is neutral, pouring bentonite into a container, and then adding warm water into the container to control the concentration of the bentonite to be 2%. The invention eliminates the negative effect of sludge, and the adding position is positioned at the front end of pulping, and the ash content can be further reduced and the utilization rate of fiber can be improved through the treatment of the pulping process.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an application method of water treatment sludge in pulping and papermaking.
Background
The paper making process includes two modes, one is mechanical process and one is manual process, and the mechanical process is continuous in paper making machine, and includes diluting paper pulp with water to certain concentration, dewatering in the net part of the paper making machine to form wet paper sheet, squeezing to dewater and stoving to form paper.
In the water treatment link of paper mills, various generated sludge contains more fine fibers, the sludge is difficult to treat as waste, the design structure of the existing treatment method is complex, and the treatment cost and the raw material cost are increased in the treatment process, so that the current situation that the application method of the water treatment sludge in pulping and papermaking is changed is urgently needed.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides an application method of water treatment sludge in pulping and papermaking.
The invention provides an application method of water treatment sludge in pulping and papermaking, which comprises the following steps:
s1: firstly, screening aerobic secondary sludge by an inclined screen device to remove moisture and ash in the aerobic secondary sludge, and then adding the treated sludge and sludge in a primary sedimentation tank into a sludge tank;
s2: fully stirring aerobic secondary sedimentation sludge and primary sedimentation sludge in a sludge tank by using a stirring device, adding an alkaline neutralizing agent while stirring, and detecting the PH in the sludge tank by using a PH detection device in the adding process until the PH value is neutral;
s3: pouring bentonite into a container, and then adding warm water into the container to control the concentration of the bentonite to be 2%;
s4: conveying the neutralized sludge to a coarse screening pulp tank by using a conveying device, and then adding a bentonite solution into the coarse screening pulp tank;
s5: the position of adding the sludge and the bentonite is positioned at the front end of pulping, and the ash content can be further reduced and the utilization rate of the fiber can be improved through the treatment of the pulping process.
Preferably, the processing system comprises a slant screen device, a pH detection device, a stirring device and a conveying device.
Preferably, the inclined screen device includes the screening case, and the sliding tray has all been seted up to the both sides inner wall of screening case, the inner wall sliding connection of sliding tray has the screen cloth, one side outer wall of screening case is provided with the motor, the output shaft of motor has the cam through the coupling joint, the cam is located the below of screen cloth.
Preferably, the PH detection device is at least one of a PH detector, a PH detection test paper and a PH test pen.
Preferably, agitating unit includes the mount, and the mount is the type structure of 20866a, the top inner wall of mount is provided with electric telescopic handle, the one end of electric telescopic handle piston rod is provided with the motor case, the inner wall of motor case is provided with the motor, the one end of motor output shaft is provided with the puddler.
Preferably, the conveying device comprises a slurry pump, the input end of the slurry pump is sleeved with a feed pipe, and the output end of the slurry pump is provided with a discharge pipe.
Preferably, the alkaline additive is a mixture of one or more of aluminum sulfate and liquid alkali.
The invention has the beneficial effects that: the invention adjusts the PH value of the sludge in the primary sedimentation tank and the aerobic secondary tank of the water treatment to be neutral, and adds the sludge to the pulping process together with bentonite, wherein the bentonite has the function of wrapping the sludge, improves the retention of the sludge, eliminates the negative effect of the sludge, and simultaneously the adding position is positioned at the front end of the pulping process, and the ash content can be further reduced and the utilization rate of fibers can be improved through the treatment of the pulping process.
Drawings
FIG. 1 is a schematic view of a work flow structure of an application method of water treatment sludge in pulping and papermaking.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Referring to fig. 1, an application method of water treatment sludge in pulping and papermaking comprises the following steps:
s1: firstly, screening aerobic secondary sludge by an inclined screen device to remove moisture and ash in the aerobic secondary sludge, and then adding the treated sludge and sludge in a primary sedimentation tank into a sludge tank;
s2: fully stirring aerobic secondary sedimentation sludge and primary sedimentation sludge in a sludge tank by using a stirring device, adding an alkaline neutralizing agent while stirring, and detecting the PH in the sludge tank by using a PH detection device in the adding process until the PH value is neutral;
s3: pouring bentonite into a container, and then adding warm water into the container to control the concentration of the bentonite to be 2%;
s4: conveying the neutralized sludge to a coarse screening pulp tank by using a conveying device, and then adding a bentonite solution into the coarse screening pulp tank;
s5: the position of adding the sludge and the bentonite is positioned at the front end of pulping, and the ash content can be further reduced and the utilization rate of the fiber can be improved through the treatment of the pulping process.
Specifically, the processing system comprises an inclined screen device, a PH detection device, a stirring device and a conveying device.
The inclined screening device comprises a screening box, sliding grooves are formed in inner walls of two sides of the screening box, a screen is connected to the inner wall of each sliding groove in a sliding mode, a motor is arranged on the outer wall of one side of the screening box, an output shaft of the motor is connected with a cam through a coupler, the cam is located below the screen, the motor can drive the cam to rotate when working, the cam can push the screen to shake up and down when rotating, therefore, sludge on the screen can be screened, and meanwhile, the situation that the screen is blocked by the sludge can be avoided.
Specifically, the PH detection device is at least one of a PH detector, a PH detection test paper, and a PH test pen.
Specifically, agitating unit includes the mount, and the mount is \20866;, type structure, the top inner wall of mount is provided with electric telescopic handle, the one end of electric telescopic handle piston rod is provided with the motor case, the inner wall of motor case is provided with the motor, the one end of motor output shaft is provided with the puddler, control electric telescopic handle piston rod extension, the puddler stretches into to the sludge impoundment in, control motor work can drive the puddler and rotate, the puddler rotates and carries out the intensive mixing to the mud in the sludge impoundment, and then can play good stirring effect.
Specifically, conveyor includes the slush pump, and the input of slush pump has cup jointed the inlet pipe, and the output of slush pump is provided with the discharging pipe, places the one end of inlet pipe in the sludge impoundment, places the one end of discharging pipe in the coarse screening thick liquid pond, and control mud pump work, the slush pump inhales mud through the inlet pipe, discharges mud to the coarse screening thick liquid pond in through the discharging pipe to accomplish the transport of mud.
Specifically, the alkaline additive is one or a mixture of aluminum sulfate and liquid alkali.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. An application method of water treatment sludge in pulping and papermaking is characterized by comprising the following steps:
s1: firstly, screening aerobic secondary sludge by an inclined screen device to remove moisture and ash in the aerobic secondary sludge, and then adding the treated sludge and sludge in a primary sedimentation tank into a sludge tank;
s2: fully stirring aerobic secondary sedimentation sludge and primary sedimentation sludge in a sludge tank by using a stirring device, adding an alkaline neutralizing agent while stirring, and detecting the PH in the sludge tank by using a PH detection device in the adding process until the PH value is neutral;
s3: pouring bentonite into a container, and then adding warm water into the container to control the concentration of the bentonite to be 2%;
s4: conveying the neutralized sludge to a coarse screening pulp tank by using a conveying device, and then adding a bentonite solution into the coarse screening pulp tank;
s5: the position of adding the sludge and the bentonite is positioned at the front end of pulping, and the ash content can be further reduced and the utilization rate of the fiber can be improved through the treatment of the pulping process.
2. The application method of the water treatment sludge in pulping and papermaking according to claim 1 is implemented by a processing system, and is characterized in that the processing system comprises a diagonal screen device, a pH detection device, a stirring device and a conveying device.
3. The application method of the water treatment sludge in pulping and papermaking as claimed in claim 1, wherein the inclined screen device comprises a screening box, sliding grooves are formed in inner walls of two sides of the screening box, a screen is connected to the inner walls of the sliding grooves in a sliding mode, a motor is arranged on the outer wall of one side of the screening box, an output shaft of the motor is connected with a cam through a coupling, and the cam is located below the screen.
4. The method as claimed in claim 1, wherein the pH detecting device is at least one of a pH detector, a pH detecting paper and a pH testing pen.
5. The application method of the water treatment sludge in pulping and papermaking according to claim 1, wherein the stirring device comprises a fixing frame in a structure of a' 20866;, an electric telescopic rod is arranged on the inner wall of the top of the fixing frame, a motor box is arranged at one end of a piston rod of the electric telescopic rod, a motor is arranged on the inner wall of the motor box, and a stirring rod is arranged at one end of an output shaft of the motor.
6. The application method of the water treatment sludge in pulping and papermaking as claimed in claim 1, wherein the conveying device comprises a slurry pump, a feed pipe is sleeved at an input end of the slurry pump, and a discharge pipe is arranged at an output end of the slurry pump.
7. The method as claimed in claim 1, wherein the alkaline additive is a mixture of one or more of aluminum sulfate and liquid alkali.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475073.6A CN113308932B (en) | 2021-04-29 | 2021-04-29 | Application method of water treatment sludge in pulping and papermaking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475073.6A CN113308932B (en) | 2021-04-29 | 2021-04-29 | Application method of water treatment sludge in pulping and papermaking |
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| CN113308932A true CN113308932A (en) | 2021-08-27 |
| CN113308932B CN113308932B (en) | 2022-05-17 |
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| CN202110475073.6A Active CN113308932B (en) | 2021-04-29 | 2021-04-29 | Application method of water treatment sludge in pulping and papermaking |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150274565A1 (en) * | 2012-10-26 | 2015-10-01 | Clariant International Ltd. | Method And Composition For Water Purification And Sludge Dewatering |
| CN106007257A (en) * | 2016-07-29 | 2016-10-12 | 福建省联盛纸业有限责任公司 | Sludge recovery and paper making method |
| JP2018171588A (en) * | 2017-03-31 | 2018-11-08 | Ａｃ‐Ｌａｂｏ株式会社 | Bentonite sludge treatment agent and treatment method for bentonite sludge using the same |
| CN111304953A (en) * | 2020-04-13 | 2020-06-19 | 江苏理文造纸有限公司 | Papermaking process utilizing biochemical sludge |
-
2021
- 2021-04-29 CN CN202110475073.6A patent/CN113308932B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150274565A1 (en) * | 2012-10-26 | 2015-10-01 | Clariant International Ltd. | Method And Composition For Water Purification And Sludge Dewatering |
| CN106007257A (en) * | 2016-07-29 | 2016-10-12 | 福建省联盛纸业有限责任公司 | Sludge recovery and paper making method |
| JP2018171588A (en) * | 2017-03-31 | 2018-11-08 | Ａｃ‐Ｌａｂｏ株式会社 | Bentonite sludge treatment agent and treatment method for bentonite sludge using the same |
| CN111304953A (en) * | 2020-04-13 | 2020-06-19 | 江苏理文造纸有限公司 | Papermaking process utilizing biochemical sludge |
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| CN113308932B (en) | 2022-05-17 |
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