CN111218851B - Method for producing toilet paper base paper with controllable water content and special cooling and humidifying device - Google Patents
Method for producing toilet paper base paper with controllable water content and special cooling and humidifying device Download PDFInfo
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- CN111218851B CN111218851B CN202010287900.4A CN202010287900A CN111218851B CN 111218851 B CN111218851 B CN 111218851B CN 202010287900 A CN202010287900 A CN 202010287900A CN 111218851 B CN111218851 B CN 111218851B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 238000001816 cooling Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 12
- 239000000498 cooling water Substances 0.000 claims description 34
- 238000010009 beating Methods 0.000 claims description 24
- 239000011121 hardwood Substances 0.000 claims description 18
- 239000011122 softwood Substances 0.000 claims description 18
- 229920001131 Pulp (paper) Polymers 0.000 claims description 17
- 239000007921 spray Substances 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 13
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000004537 pulping Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 230000037303 wrinkles Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000003020 moisturizing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/002—Tissue paper; Absorbent paper
- D21H27/004—Tissue paper; Absorbent paper characterised by specific parameters
- D21H27/005—Tissue paper; Absorbent paper characterised by specific parameters relating to physical or mechanical properties, e.g. tensile strength, stretch, softness
-
- 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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
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- Paper (AREA)
- Sanitary Thin Papers (AREA)
Abstract
The invention discloses a method for producing toilet paper base paper with controllable water content and a special cooling and humidifying device, which comprises the following steps: preparing slurry; preparing slurry and flowing the slurry to prepare uniform wet paper web; drying and dewatering to prepare a dry paper web; cooling and humidifying: firstly cooling the dry paper web stripped from the Yankee drying cylinder by a cooling and humidifying device, and rapidly reducing the temperature of the dry paper web to 30-40 ℃; then according to the water content of the reeled base paper, selecting whether to carry out atomized water humidification on the cooled dry paper web so as to ensure that the base paper with stable water content is obtained; the paper is coiled to prepare a raw paper roll for subsequent processing, the temperature of the raw paper on the raw paper roll is 20-30 ℃, and the water content is 7-10%. The invention can quickly cool the dry paper web, reduce the evaporation of water, make the water content of the base paper reach and stabilize above 7%, has simple process and convenient operation, and improves the quality and economic benefit of the base paper.
Description
Technical Field
The invention relates to an improvement of a toilet paper production method, belongs to the technical field of paper industry, and in particular relates to a toilet paper base paper production method with controllable water content and a special cooling and humidifying device, which are mainly applied to improving and stabilizing the water content of base paper in the production of household paper.
Background
With the development of society and the improvement of life quality, the quality requirements of people on the household paper are more and more strict, and especially the hand feeling quality of the household paper is more prominent. In the production process of the household paper, the water content of the base paper can have great influence on the paper performance, wrinkles, hand feeling and subsequent processing production, in particular to the influence on the hand feeling quality. Because of the changing factors of seasons, the fluctuation of temperature and humidity in the air can cause the fluctuation of the moisture content of the base paper in the production process of the base paper. When the moisture content in the base paper is low, the paper is brittle, poor in plasticity, hard and rough, and influences the production of a finished product processed later, so that the quality of the product is reduced, and the user experience is poor. The traditional toilet paper production process comprises the following steps: 1. and (3) preparing slurry: pulping the finished softwood pulp sheet and the hardwood pulp sheet by a pulper respectively to prepare 3% -6% wood pulp, and storing the 3% -6% wood pulp in a softwood pulp beating pond and a hardwood pulp beating pond respectively for later use; 2. slurry formulation and slurry flow: mixing the pulp in the softwood pulp beating pond and the hardwood pulp beating pond according to the required proportion to form mixed pulp, and conveying the mixed pulp to a pulp flowing box of a paper machine through a pulp flushing pump to form uniform wet paper web; 3. drying and dehydrating: after the wet paper web is dehydrated and dried by a press roll and a Yankee dryer of a paper machine, a dry paper web with the temperature of 80-90 ℃ and the moisture content of 10-15% is formed, and the dry paper web is wrinkled and peeled off the Yankee dryer by a wrinkling scraper; 4. and (3) coiling paper: the dried paper web after the Yankee drying cylinder is stripped is reeled into a stock roll for subsequent processing by a reel winder, and at the moment, the temperature of the stock roll is 40-60 ℃ and the moisture content of the stock roll is 4-6%. According to analysis, the temperature of the dry paper web is higher when the Yankee dryer is stripped, and the moisture content is higher, but in the process of coiling the dry paper web into a raw paper roll, the waste heat of the raw paper can continuously dry the raw paper on the raw paper roll, so that the raw paper on the raw paper roll is overdry; the main means for stabilizing the moisture of the base paper in the current household paper production factory are as follows: when the humidity of the air is low, the raw paper is humidified by using an atomization humidifier at the reeling position of a paper reeling machine of the paper machine. The defects are that: because the temperature of the dry paper web peeled from the Yankee dryer by the wrinkling scraper is 80-90 ℃, the temperature of the dry paper web reaching the paper winding machine is 50-70 ℃, the humidifying water is generally atomized and used, the temperature difference between the humidifying atomized water and the dry paper web is larger, the humidifying effect is not obvious, the water content of the base paper is difficult to reach more than 7%, and meanwhile, bacteria contained in the humidifying water possibly spray on the surface of the base paper, so that the quality risk is great.
Disclosure of Invention
The invention aims to provide a method for producing toilet paper base paper, which can quickly cool a dry paper web stripped from a Yankee dryer, control the temperature of the base paper on a base paper roll to be 20-30 ℃ so as to reduce the evaporation amount of water and achieve a moisturizing effect, thereby improving the water content of the base paper on the base paper roll, realizing that the water content of the base paper reaches and is stabilized to be more than 7% without additional or less moisturizing, and has the advantages of simple process, convenient operation and controllable water content, and improves the quality and economic benefit of the base paper.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the method for producing the toilet paper base paper with controllable water content is characterized by comprising the following steps of: the method comprises the following steps:
(one), preparing slurry: pulping the softwood pulp plate and the hardwood pulp plate by a pulper to prepare wood pulp, and storing the wood pulp into a softwood pulp beating pond and a hardwood pulp beating pond for standby;
(II), slurry preparation and slurry flow: mixing the wood pulp in the softwood pulp beating pond and the hardwood pulp beating pond according to a required proportion to form mixed pulp, and conveying the mixed pulp to a headbox of a paper machine through a pulp flushing pump to prepare a uniform wet paper web;
(III), drying and dehydrating: the wet paper web is dehydrated and dried by a press roll and a Yankee dryer of a paper machine to prepare a dry paper web with the temperature of 80-90 ℃ and the moisture content of 10-15%, and then the dry paper web is separated from the Yankee dryer by wrinkling and stripping of a wrinkling scraper;
Fourth, cooling and humidifying: the dry paper web stripped from the Yankee drying cylinder is firstly cooled by a cooling and humidifying device, and the temperature of the dry paper web is rapidly reduced to 30-40 ℃ so as to retain the moisture in the dry paper web; then according to the water content of the reeled base paper, selecting whether to carry out atomized water humidification on the cooled dry paper web so as to ensure that the base paper with stable water content is obtained;
Fifth, coiling the paper sheets: the cooled and humidified dry paper web is coiled by a paper coiling machine to prepare a raw paper roll for subsequent processing, and at the moment, the temperature of the raw paper on the raw paper roll is 20-30 ℃ and the water content is 7-10%.
In the fourth step, when the water content of the coiled base paper is less than 7%, starting atomized water for humidification; when the water content of the coiled base paper is not less than 7%, the humidification degree of atomized water is selected according to the requirement of the water content of the base paper.
In the fourth step, the cooling and humidifying device is a special cooling and humidifying device for producing toilet paper base paper with controllable water content, and comprises a bracket, a fixed beam and a box body, wherein the brackets are respectively and fixedly arranged at two ends of the fixed beam, the top of the box body is fixedly connected with the fixed beam, a condensing pipe is arranged in a box cavity, the front end of the condensing pipe is communicated with cooling water circulation equipment through a cooling water inflow pipe, the rear end of the condensing pipe is communicated with the cooling water circulation equipment through a cooling water return pipe, a dry paper web is attached to the bottom plate surface of a box body bottom plate and moves from front to back, and the bottom plate of the box body cools the top surface of the dry paper web; the rear end in the box intracavity be equipped with the water distribution pipe, the water distribution pipe is linked together with humidification water supply equipment through the humidification delivery pipe, the both ends of water distribution pipe are linked together with the lower return bend of both sides respectively, two return bends symmetry sets up the rear end at the box down, the lower extreme of return bend is fixed to be equipped with the spray pipe, evenly distributed is equipped with atomizer on the spray pipe, carries out spraying humidification processing to the bottom surface of the dry paper web in operation from the both sides of box through the atomizer on two spray pipes.
The temperature of the cooling water in the cooling water inflow pipe is controlled to be 0-10 ℃.
The invention further aims to provide the cooling and humidifying device special for toilet paper base paper production, which is simple in structure, flexible and convenient to use, time-saving and labor-saving, and capable of reducing labor intensity and controlling water content.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: this dedicated cooling humidification device of controllable toilet paper body paper production of water content, including support, fixed beam and box, the both ends of fixed beam are fixed respectively and are equipped with the support, its characterized in that: the top of the box body is fixedly connected with the fixed beam, a condensing pipe is arranged in the box body cavity, the front end of the condensing pipe is communicated with cooling water circulation equipment through a cooling water inflow pipe, and the rear end of the condensing pipe is communicated with the cooling water circulation equipment through a cooling water return pipe; the rear end in the box body cavity be equipped with the water distribution pipe, the water distribution pipe is linked together with humidification water supply equipment through the humidification delivery pipe, the both ends of water distribution pipe are linked together with the lower return bend of both sides respectively, two return bends symmetry sets up the rear end at the box down, the lower extreme of return bend is fixed and is equipped with the spray pipe, evenly distributed is equipped with atomizer on the spray pipe.
The axis of the water spraying pipe is parallel to the central line of the box body and parallel to the running direction of the dry paper web.
The side wall and the top wall of the inner cavity of the box body are provided with heat insulation layers.
The condensing pipe is fixedly arranged on the bottom plate of the inner cavity of the box body and is in full contact with the bottom plate of the box body, and a condensed water outflow groove communicated with the inner cavity of the box body is fixedly arranged on the side wall of the box body; the condensing tube is made of copper tubes or seamless steel tubes, and the bottom plate of the box body is made of stainless steel plates.
The cooling water circulation equipment and the humidifying water supply equipment are all in the prior art, so that the number of the cooling water circulation equipment and the humidifying water supply equipment is not more.
The invention has the beneficial effects that: compared with the prior toilet paper base paper production method, the invention ensures that the dry paper web stripped from the Yankee drying cylinder is quickly cooled, the temperature of the base paper on the base paper roll is controlled at 20-30 ℃, the evaporation of water is reduced, and the moisturizing effect is achieved, thereby improving the water content of the base paper on the base paper roll, realizing that the water content of the base paper reaches and stabilizes above 7 percent without additional or less humidification, having simple process and convenient operation, and improving the quality and economic benefit of the base paper.
Drawings
Fig. 1 is a schematic diagram of the structure of a special cooling and humidifying device for producing toilet paper base paper with controllable water content in front view;
Fig. 2 is a schematic diagram showing a top view of a box body of a special cooling and humidifying device for producing toilet paper base paper with controllable water content;
FIG. 3 is a schematic cross-sectional view of the case taken along the direction A-A in FIG. 1;
fig. 4 is a schematic view showing the bottom view of the structure of the box body of the special cooling and humidifying device for producing toilet paper base paper with controllable water content.
In the figure: 1. a bracket; 2. a fixed beam; 3. a case; 4. condensed water outflow groove; 5. a cooling water return pipe; 6. a cooling water inflow pipe; 7. humidifying water supply pipe; 8. a lower bent pipe; 9. a water spray pipe; 10. a water distribution pipe; 11. an atomizing nozzle; 12. and a condensing tube.
Detailed Description
Example 1: producing toilet paper base paper with water content of 10%.
The method for producing the toilet paper base paper with controllable water content is characterized by comprising the following steps of: the method comprises the following steps:
(one), preparing slurry: pulping the softwood pulp plate and the hardwood pulp plate by a pulper to prepare wood pulp, and storing the wood pulp into a softwood pulp beating pond and a hardwood pulp beating pond for standby;
(II), slurry preparation and slurry flow: mixing the wood pulp in the softwood pulp beating pond and the hardwood pulp beating pond according to a required proportion to form mixed pulp, and conveying the mixed pulp to a headbox of a paper machine through a pulp flushing pump to prepare a uniform wet paper web;
(III), drying and dehydrating: the wet paper web is dehydrated and dried by a press roll and a Yankee dryer of a paper machine to prepare a dry paper web with the temperature of 80 ℃ and the moisture content of 15 percent, and then the dry paper web is separated from the Yankee dryer by wrinkling and stripping of a wrinkling scraper;
Fourth, cooling and humidifying: firstly cooling the dry paper web stripped from the Yankee drying cylinder by a cooling and humidifying device, and rapidly reducing the temperature of the dry paper web to 30 ℃ so as to retain the moisture in the dry paper web; starting atomized water humidification of a cooling and humidifying device in the coiling process, and humidifying atomized water of the cooled dry paper web to ensure that base paper with stable water content is obtained;
Fifth, coiling the paper sheets: the cooled and humidified dry paper web is coiled by a paper coiling machine to prepare a raw paper roll for subsequent processing, and at the moment, the temperature of the raw paper on the raw paper roll is 20 ℃ and the water content is 10%.
And (3) detecting: the ration of the base paper is 16.53 g/square meter, the moisture content of the base paper is 10.3%, the base paper has smooth and soft hand feeling, and the grade B of the wrinkle grade meets the requirements. Within the industry, the detection of the moisture content of the base paper had an error of.+ -. 0.5% and was normal, and thus the moisture content of the base paper of example 1 was recorded as 10%.
Example 2: the toilet paper base paper with the water content of 7% is produced.
The method for producing the toilet paper base paper with controllable water content is characterized by comprising the following steps of: the method comprises the following steps:
(one), preparing slurry: pulping the softwood pulp plate and the hardwood pulp plate by a pulper to prepare wood pulp, and storing the wood pulp into a softwood pulp beating pond and a hardwood pulp beating pond for standby;
(II), slurry preparation and slurry flow: mixing the wood pulp in the softwood pulp beating pond and the hardwood pulp beating pond according to a required proportion to form mixed pulp, and conveying the mixed pulp to a headbox of a paper machine through a pulp flushing pump to prepare a uniform wet paper web;
(III), drying and dehydrating: the wet paper web is dehydrated and dried by a press roll and a Yankee dryer of a paper machine to prepare a dry paper web with the temperature of 90 ℃ and the moisture content of 10 percent, and then the dry paper web is separated from the Yankee dryer by wrinkling and stripping of a wrinkling scraper;
Fourth, cooling and humidifying: firstly cooling the dry paper web stripped from the Yankee drying cylinder by a cooling and humidifying device, and rapidly reducing the temperature of the dry paper web to 40 ℃ so as to retain the moisture in the dry paper web; atomized water humidification without starting a cooling and humidifying device is performed in the coiling process;
fifth, coiling the paper sheets: the cooled dry paper web is coiled by a paper coiling machine to prepare a raw paper roll for subsequent processing, and at the moment, the temperature of the raw paper on the raw paper roll is 30 ℃ and the water content is 7%.
And (3) detecting: the basis weight of the base paper is 16.64 g/square meter, the moisture content of the base paper is 7.2%, the hand feeling is coarse and hard, and the grade B of the wrinkle grade meets the requirements. Within the industry, the detection of the moisture content of the base paper had an error of.+ -. 0.5% and was normal, and thus the moisture content of the base paper of example 2 was recorded as 7%.
Example 3: the toilet paper base paper with the water content of 8.5 percent is produced.
The method for producing the toilet paper base paper with controllable water content is characterized by comprising the following steps of: the method comprises the following steps:
(one), preparing slurry: pulping the softwood pulp plate and the hardwood pulp plate by a pulper to prepare wood pulp, and storing the wood pulp into a softwood pulp beating pond and a hardwood pulp beating pond for standby;
(II), slurry preparation and slurry flow: mixing the wood pulp in the softwood pulp beating pond and the hardwood pulp beating pond according to a required proportion to form mixed pulp, and conveying the mixed pulp to a headbox of a paper machine through a pulp flushing pump to prepare a uniform wet paper web;
(III), drying and dehydrating: the wet paper web is dehydrated and dried by a press roll and a Yankee dryer of a paper machine to prepare a dry paper web with the temperature of 85 ℃ and the moisture content of 12 percent, and then the dry paper web is separated from the Yankee dryer by wrinkling and stripping of a wrinkling scraper;
Fourth, cooling and humidifying: firstly cooling the dry paper web stripped from the Yankee drying cylinder by a cooling and humidifying device, and rapidly reducing the temperature of the dry paper web to 35 ℃ so as to retain the moisture in the dry paper web; starting atomized water humidification of a cooling and humidifying device in the coiling process, and humidifying atomized water of the cooled dry paper web to ensure that base paper with stable water content is obtained;
Fifth, coiling the paper sheets: the cooled and humidified dry paper web is coiled by a paper coiling machine to prepare a raw paper roll for subsequent processing, and at the moment, the temperature of the raw paper on the raw paper roll is 25 ℃ and the water content is 8.5 percent.
And (3) detecting: the ration of the base paper is 16.58 g/square meter, the moisture content of the base paper is 8.6%, the base paper has soft and smooth hand feeling, and the grade A of the wrinkle grade meets the requirements. Within the industry, the detection of the moisture content of the base paper had an error of.+ -. 0.5% and was therefore a nominal one, and thus the moisture content of the base paper of example 3 was designated as 8.5%.
The three embodiments adopt a special cooling and humidifying device for producing toilet paper base paper with controllable water content for cooling and humidifying.
This dedicated cooling humidification device of controllable toilet paper body paper production of water content, including support 1, fixed beam 2 and box 3, the both ends of fixed beam 2 are fixed respectively and are equipped with support 1, its characterized in that: the top of the box body 3 is fixedly connected with the fixed beam 2, so that the box body 3 is suspended below the fixed beam 2, a condensation pipe 12 is arranged in a cavity of the box body 3, the front end of the condensation pipe 12 is communicated with cooling water circulation equipment through a cooling water inflow pipe 6, and the rear end of the condensation pipe 12 is communicated with the cooling water circulation equipment through a cooling water return pipe 5, so that the cooling water circulation equipment sends cooling water into the condensation pipe 12 from the cooling water inflow pipe 6, and after heat exchange is carried out between the condensation pipe 12 and the box body 3, the cooling water flows back to the cooling water circulation equipment through the cooling water return pipe 5; the rear end in box 3 intracavity be equipped with water distribution pipe 10, water distribution pipe 10 is linked together with humidification water supply equipment through humidification delivery pipe 7, the both ends of water distribution pipe 10 are linked together with the lower return bend 8 of both sides respectively, two lower return bends 8 symmetry set up the rear end at box 3, the fixed spray pipe 9 that is equipped with of lower return bend 8 lower extreme, evenly distributed is equipped with atomizer 11 on the spray pipe 9, carries out the spraying humidification processing to the bottom surface of the dry paper web in operation from the both sides of box 3 through atomizer 11 on two spray pipes 9.
The axis of the water spraying pipe 9 is parallel to the central line of the box body 3 and parallel to the running direction of the dry paper web.
The side wall and the top wall of the inner cavity of the box body 3 are provided with heat insulation layers.
The condensing pipe 12 is fixedly arranged on the bottom plate of the inner cavity of the box body 3 and is in full contact with the bottom plate of the box body 3 so as to exchange heat uniformly, so that the bottom plate of the box body 3 can always keep a lower temperature, the top surface of a dry paper web running against the bottom plate surface of the bottom plate of the box body 3 is cooled, and a condensed water outflow groove 4 communicated with the inner cavity of the box body 3 is fixedly arranged on the side wall of the box body 3 so that condensed water generated in the inner cavity of the box body 3 can be discharged out of the inner cavity of the box body 3; the condensing tube 12 is made of copper tubes or seamless steel tubes, and the bottom plate of the box body 3 is made of stainless steel plates.
The cooling water circulation equipment and the humidifying water supply equipment are all in the prior art, so that the number of the cooling water circulation equipment and the humidifying water supply equipment is not more.
The temperature of the cooling water in the cooling water inflow pipe 6 is controlled to be 0-10 ℃.
When the device is used, the special cooling and humidifying device for producing the toilet paper base paper with controllable water content is placed in a space between the Yankee dryer and the paper winding machine of the paper machine, the dry paper web stripped from the Yankee dryer runs against the bottom plate surface of the bottom plate of the box body 3, runs from the front end to the rear end of the box body 3, and is finally wound into the base paper roll through the paper winding machine.
Claims (1)
1. The method for producing the toilet paper base paper with controllable water content is characterized by comprising the following steps of: the method comprises the following steps:
(one), preparing slurry: pulping the softwood pulp plate and the hardwood pulp plate by a pulper to prepare wood pulp, and storing the wood pulp into a softwood pulp beating pond and a hardwood pulp beating pond for standby;
(II), slurry preparation and slurry flow: mixing the wood pulp in the softwood pulp beating pond and the hardwood pulp beating pond according to a required proportion to form mixed pulp, and conveying the mixed pulp to a headbox of a paper machine through a pulp flushing pump to prepare a uniform wet paper web;
(III), drying and dehydrating: the wet paper web is dehydrated and dried by a press roll and a Yankee dryer of a paper machine to prepare a dry paper web with the temperature of 80-90 ℃ and the moisture content of 10-15%, and then the dry paper web is separated from the Yankee dryer by wrinkling and stripping of a wrinkling scraper;
Fourth, cooling and humidifying: the dry paper web stripped from the Yankee drying cylinder is firstly cooled by a cooling and humidifying device, and the temperature of the dry paper web is rapidly reduced to 30-40 ℃ so as to retain the moisture in the dry paper web; then according to the water content of the reeled base paper, selecting whether to carry out atomized water humidification on the cooled dry paper web so as to ensure that the base paper with stable water content is obtained;
When the water content of the coiled base paper is less than 7%, starting atomized water for humidification; when the water content of the coiled base paper is not less than 7%, selecting the humidification degree of atomized water according to the requirement of the water content of the base paper;
The cooling and humidifying device is a special cooling and humidifying device for toilet paper base paper production with controllable water content, the special cooling and humidifying device for toilet paper base paper production with controllable water content is placed in a space between a Yankee dryer and a paper winding machine of a paper machine and comprises a support (1), a fixed beam (2) and a box body (3), the support (1) is fixedly arranged at two ends of the fixed beam (2) respectively, the top of the box body (3) is fixedly connected with the fixed beam (2), a condensing pipe (12) is arranged in a cavity of the box body (3), the front end of the condensing pipe (12) is communicated with cooling water circulation equipment through a cooling water inflow pipe (6), the rear end of the condensing pipe (12) is communicated with the cooling water circulation equipment through a cooling water return pipe (5), a dry paper web is attached to a bottom plate surface of a bottom plate of the box body (3) and runs from front to back, and the bottom plate of the box body (3) cools the top surface of the dry paper web; the automatic paper machine is characterized in that a water distribution pipe (10) is arranged at the rear end in a cavity of the box body (3), the water distribution pipe (10) is communicated with humidifying water supply equipment through a humidifying water supply pipe (7), two ends of the water distribution pipe (10) are respectively communicated with lower bent pipes (8) at two sides, the two lower bent pipes (8) are symmetrically arranged at the rear end of the box body (3), water spray pipes (9) are fixedly arranged at the lower ends of the lower bent pipes (8), atomizing nozzles (11) are uniformly distributed on the water spray pipes (9), and spray humidifying treatment is carried out on the bottom surface of a running dry paper web from two sides of the box body (3) through the atomizing nozzles (11) on the two water spray pipes (9);
the axis of the water spraying pipe (9) is parallel to the central line of the box body (3) and parallel to the running direction of the dry paper web;
the side wall and the top wall of the inner cavity of the box body (3) are provided with heat insulation layers;
the condensing pipe (12) is fixedly arranged on a bottom plate of the inner cavity of the box body (3) and is in full contact with the bottom plate of the box body (3), and a condensed water outflow groove (4) communicated with the inner cavity of the box body (3) is fixedly arranged on the side wall of the box body (3); the condensing pipe (12) is made of a copper pipe or a seamless steel pipe, and the bottom plate of the box body (3) is made of a stainless steel plate;
the temperature of the cooling water in the cooling water inflow pipe (6) is controlled to be 0-10 ℃;
Fifth, coiling the paper sheets: the cooled and humidified dry paper web is coiled by a paper coiling machine to prepare a raw paper roll for subsequent processing, and at the moment, the temperature of the raw paper on the raw paper roll is 20-30 ℃ and the water content is 7-10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287900.4A CN111218851B (en) | 2020-04-14 | 2020-04-14 | Method for producing toilet paper base paper with controllable water content and special cooling and humidifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287900.4A CN111218851B (en) | 2020-04-14 | 2020-04-14 | Method for producing toilet paper base paper with controllable water content and special cooling and humidifying device |
Publications (2)
| Publication Number | Publication Date |
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| CN111218851A CN111218851A (en) | 2020-06-02 |
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| CN101338533A (en) * | 2008-07-31 | 2009-01-07 | 杨清国 | Method for producing toilet paper |
| CN105544275A (en) * | 2015-12-10 | 2016-05-04 | 周妙思 | Method for producing towel body paper by semidry method creping |
| CN107313299A (en) * | 2016-04-27 | 2017-11-03 | 上海东冠纸业有限公司 | A kind of preparation method of amenities high-air-permeability water suction lining paper |
| CN209456804U (en) * | 2018-12-17 | 2019-10-01 | 浙江金通纸业有限公司 | A kind of papermaking humidifier |
| CN110904721A (en) * | 2019-12-31 | 2020-03-24 | 上海东冠纸业有限公司 | Ultrasonic humidifying device of paper machine |
| CN212052117U (en) * | 2020-04-14 | 2020-12-01 | 维达纸业（山东）有限公司 | Dedicated cooling humidification device of controllable toilet paper body paper production of water content |
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- 2020-04-14 CN CN202010287900.4A patent/CN111218851B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338533A (en) * | 2008-07-31 | 2009-01-07 | 杨清国 | Method for producing toilet paper |
| CN105544275A (en) * | 2015-12-10 | 2016-05-04 | 周妙思 | Method for producing towel body paper by semidry method creping |
| CN107313299A (en) * | 2016-04-27 | 2017-11-03 | 上海东冠纸业有限公司 | A kind of preparation method of amenities high-air-permeability water suction lining paper |
| CN209456804U (en) * | 2018-12-17 | 2019-10-01 | 浙江金通纸业有限公司 | A kind of papermaking humidifier |
| CN110904721A (en) * | 2019-12-31 | 2020-03-24 | 上海东冠纸业有限公司 | Ultrasonic humidifying device of paper machine |
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