CN109371736B - Preparation process of white craft paper - Google Patents
Preparation process of white craft paper Download PDFInfo
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- CN109371736B CN109371736B CN201811532794.0A CN201811532794A CN109371736B CN 109371736 B CN109371736 B CN 109371736B CN 201811532794 A CN201811532794 A CN 201811532794A CN 109371736 B CN109371736 B CN 109371736B
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- cleaning agent
- cotton cloth
- coarse cotton
- cleaning
- cleaned
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F1/00—Wet end of machines for making continuous webs of paper
- D21F1/32—Washing wire-cloths or felts
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- Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
Abstract
The invention provides a cleaning process for producing a felt of a white craft paper, which is characterized by comprising the following steps: the upper coarse cotton cloth is cleaned by using the first cleaning agent, the lower coarse cotton cloth is cleaned by using the second cleaning agent, and the lower coarse cotton cloth is cleaned by intermittently using the third cleaning agent. The process can effectively solve the problem of dirt on the upper and lower felts, remove organic and inorganic pollutants accumulated in the felts, and improve the porosity and the absorptivity of the blanket, thereby improving the dewatering performance of the felts.
Description
Technical Field
The invention belongs to the technical field of papermaking, relates to a preparation process of a white craft paper, and particularly relates to a cleaning process of a coarse cotton cloth for producing the white craft paper.
Background
The white craft paper belongs to the category of packaging paper, has unique characteristics on printing and finishing, has high whiteness, high strength, good ink absorbability and excellent printability, and not only has good packaging and protecting effects. The surface course uses DMOW thick liquid among the white face ox card production technology, and the sticky content is few, adds calcium carbonate in the surface course thick liquid and improves surface course whiteness, and OCC thick liquid is used to the bottom, and sticky content is many, and in normal production, the press section dewaters into paper, and the aquatic contains more dirty can block up the coarse cotton cloth, leads to the coarse cotton cloth dirty, influences into paper dewatering effect, for solving the dirty problem of coarse cotton cloth, mainly uses high pressure water and alkaline coarse cotton cloth cleaning agent to clean the coarse cotton cloth at present.
Because the surface and bottom layer sizing agents are different, the stains adhered to the surfaces of the upper coarse cotton cloth and the lower coarse cotton cloth are different, the main component of the stains contacting the front surface of the upper coarse cotton cloth is calcium carbonate, the main component of the stains contacting the back surface of the lower coarse cotton cloth is sticky, and the upper coarse cotton cloth and the lower coarse cotton cloth have poor effect of removing the stains containing the calcium carbonate by using the alkaline coarse cotton cloth cleaning agent.
CN 101768889 a discloses a felt cleaning device for a paper machine, which is a steam type felt cleaning device provided at a frame of a blanket roll of the paper machine, wherein the steam type felt cleaning device comprises: a steam main pipe vertical to the running direction of the felt; and the steam branch pipes are arranged on the steam main pipe and are in the same direction with the running direction of the coarse cotton cloth, and the steam branch pipes are provided with nozzles which are 6-8cm away from the coarse cotton cloth. The invention also provides a paper machine containing the felt cleaning device and a felt cleaning method. The device and the method can reduce the cleaning frequency of the felt, improve the air permeability of the felt, prolong the service life of the felt and reduce the unqualified product back-copying caused by impurities of the felt.
CN 207628807U discloses automatic washing unit in coarse cotton cloth limit for papermaking of pulping, comprising a base plate, the bottom plate top is equipped with first water tank, first water tank one side is equipped with the water pump, water pump one side is equipped with clear water PU pipe, clear water PU inside is equipped with first relief pressure valve, first relief pressure valve one side is equipped with the ball valve, ball valve one side is equipped with first tee bend, first tee bend both ends all are equipped with jetter, jetter bottom is equipped with the fixed bolster, the jetter top is equipped with net blanket cleaner PU pipe. The device can adjust the directional position of wasing of vaporific shower nozzle through setting up the jetter, through the hose, and flexible pipe can prolong vaporific shower nozzle, is favorable to improving the cleaning range of vaporific shower nozzle for vaporific shower nozzle is adjustable, and then the accurate greasy dirt that produces than middle part position to the coarse cotton cloth both ends washs, can come to adjust vaporific shower nozzle according to the region that the greasy dirt appears, has improved the efficiency of wasing the greasy dirt.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a cleaning process for producing the felt of the white craft paper, which can effectively solve the problem of dirt on the upper and lower felts, remove organic and inorganic pollutants accumulated in the felts, improve the porosity and the absorptivity of the felt and further improve the dewatering performance of the felts.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a cleaning process for producing a coarse cotton cloth of a white craft paper, which comprises the following steps:
the upper coarse cotton cloth is cleaned by using the first cleaning agent, the lower coarse cotton cloth is cleaned by using the second cleaning agent, and the lower coarse cotton cloth is cleaned by intermittently using the third cleaning agent.
As the preferable technical scheme of the invention, the first cleaning agent is an acidic cleaning agent.
In a preferred embodiment of the present invention, the first preservative is added in an amount of 30 to 50mL/min, such as 30mL/min, 32mL/min, 35mL/min, 38mL/min, 40mL/min, 42mL/min, 45mL/min, 48mL/min, or 50mL/min, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
In the invention, if the addition amount of the acidic cleaning agent is less than 30mL/min, the cleaning effect on the coarse cotton cloth is relatively poor, the continuous cleaning effect cannot be achieved, and if the addition amount of the acidic cleaning agent is more than 50mL/min, the medicine waste is caused, and the production cost is increased.
As the preferable technical scheme of the invention, the second cleaning agent is a neutral cleaning agent.
As a preferable technical scheme of the invention, the adding amount of the second cleaning agent is 25-35 mL/min, such as 25mL/min, 26mL/min, 27mL/min, 28mL/min, 29mL/min, 30mL/min, 31mL/min, 32mL/min, 33mL/min, 34mL/min or 35mL/min, and the like, but the adding amount is not limited to the enumerated values, and other unrecited values in the numerical range are also applicable.
In the invention, if the addition amount of the neutral cleaning agent is less than 25mL/min, the cleaning effect on the coarse cotton cloth is relatively poor, the continuous cleaning effect cannot be achieved, and if the addition amount of the neutral cleaning agent is more than 35mL/min, the medicine waste is caused, and the production cost is increased.
As the preferable technical scheme of the invention, the third cleaning agent is an alkaline cleaning agent.
As the preferable technical scheme of the invention, the method for cleaning the lower coarse cotton cloth by using the third cleaning agent in an intermittent manner is to clean the lower coarse cotton cloth once every 2-5 hours, and each time of cleaning is 0.5-2 hours.
The washing may be performed once every 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, or 5 hours, and each washing may be performed for 0.5 hour, 0.6 hour, 0.8 hour, 1 hour, 1.2 hours, 1.5 hours, 1.8 hours, or 2 hours, but the washing is not limited to the above-mentioned values, and other values not listed in the above-mentioned ranges of values are also applicable.
As a preferable technical scheme, the addition amount of the third cleaning agent is 40-60 mL/min, such as 40mL/min, 42mL/min, 45mL/min, 50mL/min, 52mL/min, 55mL/min, 58mL/min or 60mL/min, but the invention is not limited to the enumerated values, and other non-enumerated values in the numerical range are also applicable.
As the preferable technical scheme of the invention, the spraying ports of the first cleaning agent, the second cleaning agent and the third cleaning agent are respectively and independently close to the position of a paper forming outlet.
As the preferred technical scheme of the invention, the cleaning process of the coarse cotton cloth for producing the white craft paper comprises the following steps:
the upper coarse cotton cloth is cleaned by using an acidic cleaning agent in an adding amount of 30-50 mL/min, meanwhile, the lower coarse cotton cloth is cleaned by using a neutral cleaning agent in an adding amount of 25-35 mL/min, and the lower coarse cotton cloth is cleaned by intermittently using an alkaline cleaning agent in an adding amount of 40-60 mL/min, wherein each cleaning time is 0.5-2 hours every 2-5 hours.
In the invention, the upper coarse cotton cloth uses the acidic cleaning agent to clean pollutants on the coarse cotton cloth, and has better removal effect on calcium carbonate; adding neutral cleaning agent into the lower felt continuously, wherein the medicine contains penetrant, dispersant, surfactant, solvent, etc. for preventing various pollutants from accumulating on the felt; alkaline cleaning agent is intermittently added into the lower coarse cotton cloth, and the medicine contains components such as dispersant and the like and is used for removing organic and inorganic pollutants in the coarse cotton cloth.
Compared with the prior art, the invention at least has the following beneficial effects:
(1) the invention provides a cleaning process for producing a coarse cotton cloth of a white craft paper, which can effectively solve the problem of dirt on the upper coarse cotton cloth and the lower coarse cotton cloth, remove organic and inorganic pollutants accumulated in the coarse cotton cloth and prolong the service life of the coarse cotton cloth by 5 to 7 days;
(2) the invention provides a cleaning process for producing a felt of a white craft paper, which improves the porosity and the absorptivity of the felt, thereby improving the dehydration performance of the felt, ensuring that the dryness of paper web squeezing is stabilized at 48-50%, stably operating, reducing the steam consumption of a drying part and lowering the production cost.
Drawings
Fig. 1 is a schematic structural diagram of a device which can be applied to the cleaning process of the coarse cotton cloth for producing the white craft paper provided by the invention.
The present invention is described in further detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
The embodiment provides a cleaning process for producing a coarse cotton cloth of a white craft paper, which comprises the following steps:
the upper felt is cleaned by using an acidic cleaning agent with the addition of 30mL/min, the lower felt is cleaned by using a neutral cleaning agent with the addition of 25mL/min, and the lower felt is cleaned by intermittently using an alkaline cleaning agent with the addition of 40mL/min for 2 hours every 2 hours.
Example 2
The embodiment provides a cleaning process for producing a coarse cotton cloth of a white craft paper, which comprises the following steps:
the upper coarse cotton cloth is cleaned by using an acidic cleaning agent in an adding amount of 50mL/min, meanwhile, the lower coarse cotton cloth is cleaned by using a neutral cleaning agent in an adding amount of 35mL/min, and the lower coarse cotton cloth is cleaned by intermittently using an alkaline cleaning agent in an adding amount of 60mL/min every 5 hours and 2 hours every time.
Example 3
The embodiment provides a cleaning process for producing a coarse cotton cloth of a white craft paper, which comprises the following steps:
the upper felt is cleaned by using an acidic cleaning agent in an adding amount of 40mL/min, the lower felt is cleaned by using a neutral cleaning agent in an adding amount of 30mL/min, and the lower felt is cleaned by intermittently using an alkaline cleaning agent in an adding amount of 50mL/min for 1 hour every 3 hours.
Example 4
The embodiment provides a cleaning process for producing a coarse cotton cloth of a white craft paper, which comprises the following steps:
the upper coarse cotton cloth is cleaned by using an acidic cleaning agent in an adding amount of 35mL/min, meanwhile, the lower coarse cotton cloth is cleaned by using a neutral cleaning agent in an adding amount of 28mL/min, and the lower coarse cotton cloth is cleaned by intermittently using an alkaline cleaning agent in an adding amount of 45mL/min every 2.5 hours and 0.8 hour every time.
Example 5
The embodiment provides a cleaning process for producing a coarse cotton cloth of a white craft paper, which comprises the following steps:
the upper coarse cotton cloth is cleaned by using an acidic cleaning agent in an adding amount of 45mL/min, meanwhile, the lower coarse cotton cloth is cleaned by using a neutral cleaning agent in an adding amount of 32mL/min, and the lower coarse cotton cloth is cleaned by intermittently using an alkaline cleaning agent in an adding amount of 55mL/min for 1.5 hours each time every 4 hours.
Comparative example
In this comparative example, the upper and lower felts were cleaned with high-pressure water and an alkaline cleaner together, and the remaining conditions were the same as in example 3.
As shown in FIG. 1, the apparatus used in examples 1 to 5 and comparative examples of the present invention uses an acidic cleaning agent which is an acidic mixture for removing organic and inorganic contaminants accumulated in the felt, and a neutral cleaning agent which contains a penetrant, a dispersant, a surfactant, a solvent, etc. for preventing various contaminants from accumulating on the felt. The alkaline cleaning agent is alkaline, and the medicine contains components such as a dispersing agent and the like, and is used for removing organic and inorganic pollutants in the coarse cotton cloth.
Compared with a comparative example, the cleaning process of the coarse cotton cloth for producing the white craft paper in the embodiments 1 to 5 can prolong the service life of the coarse cotton cloth by 5 to 7 days. Examples 1-5 improved the porosity and absorbency of the felt compared to the comparative examples, thereby increasing the dewatering performance of the felt and ensuring that the dryness of the paper sheet at the exit press was stabilized at 48-50%.
The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (2)
1. A cleaning process for producing a coarse cotton cloth of a white craft paper is characterized by comprising the following steps:
cleaning the upper coarse cotton cloth by using a first cleaning agent, cleaning the lower coarse cotton cloth by using a second cleaning agent, and intermittently cleaning the lower coarse cotton cloth by using a third cleaning agent; wherein the adding amount of the first cleaning agent is 30-50 mL/min; the adding amount of the second cleaning agent is 25-35 mL/min; the method for intermittently using the third cleaning agent to clean the lower coarse cotton cloth comprises the steps of cleaning the lower coarse cotton cloth once every 2-5 hours, and cleaning the lower coarse cotton cloth for 0.5-2 hours each time; the addition amount of the third cleaning agent is 40-60 mL/min; the first cleaning agent is an acidic cleaning agent; the second cleaning agent is a neutral cleaning agent; the third cleaning agent is an alkaline cleaning agent.
2. The process of claim 1, wherein the spray outlets of the first cleaning agent, the second cleaning agent and the third cleaning agent are respectively and independently close to the paper-forming outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811532794.0A CN109371736B (en) | 2018-12-14 | 2018-12-14 | Preparation process of white craft paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811532794.0A CN109371736B (en) | 2018-12-14 | 2018-12-14 | Preparation process of white craft paper |
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| Publication Number | Publication Date |
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| CN109371736A CN109371736A (en) | 2019-02-22 |
| CN109371736B true CN109371736B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811532794.0A Active CN109371736B (en) | 2018-12-14 | 2018-12-14 | Preparation process of white craft paper |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020129914A1 (en) * | 2001-01-18 | 2002-09-19 | Voith Paper Patent Gmbh | Process for conditioning a circulating felt belt |
| CN1721622A (en) * | 2004-07-05 | 2006-01-18 | 栗田工业株式会社 | Cleaning agent for paper production and method of cleaning felt for paper production |
| CN201406610Y (en) * | 2009-03-23 | 2010-02-17 | 杭州大路实业有限公司 | Washing device for paper machine felt |
| CN207714031U (en) * | 2017-11-28 | 2018-08-10 | 玖龙纸业（东莞）有限公司 | A kind of dry net automatic cleaning system |
-
2018
- 2018-12-14 CN CN201811532794.0A patent/CN109371736B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020129914A1 (en) * | 2001-01-18 | 2002-09-19 | Voith Paper Patent Gmbh | Process for conditioning a circulating felt belt |
| CN1721622A (en) * | 2004-07-05 | 2006-01-18 | 栗田工业株式会社 | Cleaning agent for paper production and method of cleaning felt for paper production |
| CN201406610Y (en) * | 2009-03-23 | 2010-02-17 | 杭州大路实业有限公司 | Washing device for paper machine felt |
| CN207714031U (en) * | 2017-11-28 | 2018-08-10 | 玖龙纸业（东莞）有限公司 | A kind of dry net automatic cleaning system |
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| Publication number | Publication date |
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| CN109371736A (en) | 2019-02-22 |
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