CN111395027A - Material preparation method for cotton pulp production - Google Patents
Material preparation method for cotton pulp production Download PDFInfo
- Publication number
- CN111395027A CN111395027A CN201910004248.8A CN201910004248A CN111395027A CN 111395027 A CN111395027 A CN 111395027A CN 201910004248 A CN201910004248 A CN 201910004248A CN 111395027 A CN111395027 A CN 111395027A
- Authority
- CN
- China
- Prior art keywords
- stage
- pulp
- slurry
- desander
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The invention provides a material preparation method for cotton pulp production, which comprises the following steps: a) pulping and cutting cotton linters to obtain a pulp mixture; b) after the concentration of the slurry mixture obtained in the step a) is adjusted, purifying the slurry mixture by a second-stage four-section sand remover to respectively obtain second-stage good slurry and good velvet; c) dewatering and concentrating the second-stage good pulp obtained in the step b) to obtain the pulp to be cooked. Compared with the prior art, the material preparation method provided by the invention adopts a two-stage four-section desander to perform wet material preparation, has good impurity removal effect, reduces the COD value and chroma of wastewater generated in the subsequent cooking process, has small pollution load and reduces the difficulty of sewage treatment; on the other hand, less impurities reduce the cooking difficulty and the alkali amount in the cooking process, thereby reducing the damage of fiber, improving the polymerization degree and whiteness of the final product and reducing the angstrom degree.
Description
Technical Field
The invention relates to the technical field of cotton pulp production, in particular to a material preparation method for cotton pulp production.
Background
Along with the development of society and the technical progress of enterprises, people have higher and higher requirements on the quality of cotton pulp, particularly on the purity and the performance of special cotton pulp. However, as the supply of raw materials (mainly cotton linters) changes, especially the general popularization of machine-harvested cotton, the impurity content of the cotton linters is increased, and a plurality of adverse effects are brought to the product quality, the process optimization and the pollution treatment. Therefore, the treatment of cotton linters by a specific stock preparation method becomes an important link in the production of cotton pulp.
At present, the material preparation method in the prior art mainly adopts dry type impurity removal; however, the material preparation method has poor impurity removal effect, so that on one hand, the COD value and the chroma of the wastewater generated in the subsequent cooking process are very high, the pollution load is large, and the difficulty of sewage treatment is increased; on the other hand, more impurities increase the cooking difficulty and the alkali amount in the cooking process, thereby increasing the damage of fibers and influencing the polymerization degree, whiteness and angstrom degree of a final product.
Disclosure of Invention
In view of the above, the invention aims to provide a material preparation method for cotton pulp production, which has a good impurity removal effect, can reduce pollution load, and can improve the polymerization degree and whiteness of products and reduce angstrom degree.
The invention provides a material preparation method for cotton pulp production, which comprises the following steps:
a) pulping and cutting cotton linters to obtain a pulp mixture;
b) after the concentration of the slurry mixture obtained in the step a) is adjusted, purifying the slurry mixture by a second-stage four-section sand remover to respectively obtain second-stage good slurry and good velvet;
c) dewatering and concentrating the second-stage good pulp obtained in the step b) to obtain the pulp to be cooked.
Preferably, the sulfur value of the cotton linters in the step a) is 4 to 10 percent, and the ash content is 0.5 to 1.5 percent.
Preferably, the beating and cutting process in the step a) specifically comprises the following steps:
opening cotton linters, then sequentially carrying out cotton opening and dry impurity removal, sending the cotton linters to a cyclone separator by wind, adding water for spraying and presoaking, then entering a pressing screw, conveying the cotton linters to a cyclone semi-pulp machine by a screw conveyor, adding water for mixing until the concentration of pulp is 3% -7%, and then cutting and pulping to obtain a pulp mixture.
Preferably, the concentration of the concentration-adjusted slurry in step b) is 0.4-0.8%.
Preferably, the purification treatment process by the second-stage four-section sand remover in the step b) specifically comprises the following steps:
feeding the slurry into a first-stage desander to respectively obtain first-stage good slurry and first-stage tailings; then the first-stage fine pulp enters a second-stage first-stage desander to respectively obtain second-stage fine pulp and second-stage tailings; simultaneously, sequentially carrying out first impurity removal on the primary tailings by a primary two-section desander, a primary three-section desander and a primary four-section desander to obtain fine hair;
and (4) carrying out secondary impurity removal on the secondary tailings sequentially through a secondary two-section desander, a primary three-section desander and a primary four-section desander to obtain the fine wool.
Preferably, the slurry enters the first-stage sand remover at a slurry inlet pressure of 0.28-0.30 mPa and a flow rate of 380L-420L/min.
Preferably, the pulp inlet pressure of the first-stage good pulp entering the second-stage first-stage desander is 0.31-0.33 mPa, and the flow rate is 230L-270L/min.
Preferably, the pulp inlet pressure of the primary tailings through the primary two-stage desander is 0.24-0.26 mPa, and the flow rate is 380L-420L/min;
the slurry feeding pressure of the secondary tailings through the secondary two-stage sand remover is 0.27-0.29 mPa, and the flow rate is 380L-420L/min.
Preferably, the slurry inlet pressure of the first-stage three-section desander is 0.21-0.23 mPa, and the flow rate is 380L-420L/min;
the slurry inlet pressure of the first-stage four-section desander is 0.19-0.21 mPa, and the flow rate is 380L-420L/min.
Preferably, the concentration of the dehydration concentration in step c) is 8% to 12%.
The invention provides a material preparation method for cotton pulp production, which comprises the following steps: a) pulping and cutting cotton linters to obtain a pulp mixture; b) after the concentration of the slurry mixture obtained in the step a) is adjusted, purifying the slurry mixture by a second-stage four-section sand remover to respectively obtain second-stage good slurry and good velvet; c) dewatering and concentrating the second-stage good pulp obtained in the step b) to obtain the pulp to be cooked. Compared with the prior art, the material preparation method provided by the invention adopts a two-stage four-section desander to perform wet material preparation, has good impurity removal effect, reduces the COD value and chroma of wastewater generated in the subsequent cooking process, has small pollution load and reduces the difficulty of sewage treatment; on the other hand, less impurities reduce the cooking difficulty and the alkali amount in the cooking process, thereby reducing the damage of fiber, improving the polymerization degree and whiteness of the final product and reducing the angstrom degree.
In addition, the preparation method provided by the invention has strong processing capacity, can be matched with the existing cotton pulp production line, thereby realizing the application in large-scale industrial production and having wide development prospect.
Drawings
FIG. 1 is a schematic view showing the connection relationship and operation of a two-stage four-stage desander according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 invention provides a material preparation method for cotton pulp production, which comprises the following steps:
a) pulping and cutting cotton linters to obtain a pulp mixture;
b) after the concentration of the slurry mixture obtained in the step a) is adjusted, purifying the slurry mixture by a second-stage four-section sand remover to respectively obtain second-stage good slurry and good velvet;
c) dewatering and concentrating the second-stage good pulp obtained in the step b) to obtain the pulp to be cooked.
The invention firstly carries out pulping and cutting on the cotton linter to obtain a pulp mixture. In the present invention, the sulfur value of the cotton linters is preferably 4% to 10%, more preferably 5% to 9%; the ash content of the cotton linters is preferably 0.5% to 1.5%, more preferably 0.6% to 1%. The source of the cotton linters is not particularly limited in the present invention, and commercially available products well known to those skilled in the art may be used; in a preferred embodiment of the present invention, said cotton linters are new class ii cotton linters produced in xinjiang.
In the invention, the beating and cutting process preferably comprises the following specific steps:
opening cotton linters, then sequentially opening cotton, removing impurities in a dry mode, sending the cotton linters to a cyclone separator by wind, adding water, spraying and presoaking the cotton linters, then entering a pressing screw, conveying the cotton linters to a cyclone semi-pulp machine by a screw conveyor, adding water, mixing the cotton linters and the water until the concentration of pulp is 3% -7%, and then cutting and pulping the cotton linters to obtain a pulp mixture;
more preferably:
opening cotton linters, then sequentially carrying out cotton opening and dry impurity removal, sending the cotton linters to a cyclone separator by wind, adding water for spraying and presoaking, then entering a pressing screw, conveying the cotton linters to a cyclone semi-pulp machine by a screw conveyor, adding water for mixing until the concentration of pulp is 4% -6%, and then cutting and pulping to obtain a pulp mixture.
The present invention is not particularly limited to the cotton opening apparatus, and a cotton opener well known to those skilled in the art may be used. The dry impurity removal equipment is not particularly limited, and a dry impurity removal system well known to those skilled in the art can be adopted.
In the invention, the time for cutting and beating is preferably 5min to 20min, and more preferably 10min to 15 min.
After the slurry mixture is obtained, the concentration of the obtained slurry mixture is adjusted, and then the obtained slurry mixture is purified by a secondary four-section sand remover to respectively obtain secondary fine pulp and fine wool. In the present invention, the concentration adjusting apparatus preferably employs a dilution slurrying tank well known to those skilled in the art. In the present invention, the concentration adjustment is preferably performed under stirring conditions to avoid stillness and precipitation.
In the present invention, the concentration of the concentration-adjusted slurry is preferably 0.4% to 0.8%, more preferably 0.5% to 0.7%. The concentration of the slurry is controlled within a specific range through concentration adjustment, so that the subsequent two-stage four-section desander can be ensured to normally operate without blockage, and the impurity removal effect is good, thereby being practical and feasible in actual process and operation.
In the invention, the process of the purification treatment by the two-stage four-section desander is preferably as follows:
feeding the slurry into a first-stage desander to respectively obtain first-stage good slurry and first-stage tailings; then the first-stage fine pulp enters a second-stage first-stage desander to respectively obtain second-stage fine pulp and second-stage tailings; simultaneously, sequentially carrying out first impurity removal on the primary tailings by a primary two-section desander, a primary three-section desander and a primary four-section desander to obtain fine hair;
and (4) carrying out secondary impurity removal on the secondary tailings sequentially through a secondary two-section desander, a primary three-section desander and a primary four-section desander to obtain the fine wool.
In the invention, the two-stage four-section desander consists of six groups of low-concentration desanders, and each group of low-concentration desanders is provided with a pump for conveying materials; the method specifically comprises the following steps: the system comprises a first-stage desander, a first-stage pump, a second-stage first-stage desander, a second-stage first-stage pump, a second-stage desander, a first-stage third-stage pump, a first-stage four-stage desander and a first-stage four-stage pump.
In the invention, the main principle and the operation mode of the low-concentration desander are as follows: the slurry enters a desander through a pump under the condition of specific concentration, and fibers and impurities are layered under the action of centrifugal force; the impurities with higher specific gravity move to the outer layer, and the fibers with lower specific gravity are accumulated in the inner layer; the impurities on the outer layer gradually move to the slag discharging port and are discharged from the slag discharging port under the action of gravity, centrifugal force and gradually reduced wall resistance; the good pulp (good fiber) is gradually pushed to the direction (good pulp outlet) opposite to the impurities to move due to the extrusion of the impurities on the outer layer and the reaction force of the gradually reduced wall, and is finally discharged from the good pulp outlet, thereby achieving the purpose of separating the good pulp from the impurities.
In the invention, the connection relation and the working process schematic diagram of the two-stage four-section desander are shown in a figure 1, slurry firstly enters a first-stage one-section desander to obtain first-stage good slurry and first-stage tailings respectively, 22-26 low-concentration desanders with the models of NHS-2-10, which are well known to the technical personnel in the field, are preferably adopted in the first-stage one-section desander, the slurry inlet pressure of the slurry firstly entering the first-stage one-section desander is preferably 0.28-0.30 mPa, more preferably 0.29mPa, and the flow rate of the slurry firstly entering the first-stage one-section desander is preferably 380L/min-420L/min, more preferably 400L/min.
The first-stage fine pulp enters a second-stage first-stage desander to obtain second-stage fine pulp and second-stage tailings respectively, wherein the second-stage first-stage desander preferably adopts 34-38 low-concentration desanders with the models of XHS-2-16, which are well known to the technical personnel in the field, in the invention, the pulp inlet pressure of the first-stage fine pulp entering the second-stage first-stage desander is preferably 0.31-0.33 mPa, more preferably 0.32mPa, and the flow rate of the first-stage fine pulp entering the second-stage first-stage desander is preferably 230L-270L/min, more preferably 250L/min.
In the invention, the first-stage tailings are subjected to first impurity removal sequentially through a first-stage two-stage sand remover, a first-stage three-stage sand remover and a first-stage four-stage sand remover to obtain fine wool, wherein the number of the first-stage two-stage sand remover is preferably 7-9, which are known to the technical personnel in the field and have the model number of NHS-1-5, the pulp inlet pressure of the first-stage tailings through the first-stage two-stage sand remover is preferably 0.24-0.26 mPa, more preferably 0.25mPa, and the flow rate of the first-stage tailings through the first-stage two-stage sand remover is preferably 380L-420L/min, more preferably 400L/min.
In the invention, the first-stage three-section desander is preferably a low-concentration desander with the model number of NHS-1-2 and the number of the low-concentration desander is 5-7, the slurry feeding pressure of the first-stage three-section desander is preferably 0.21-0.23 mPa, more preferably 0.22mPa, and the flow rate of the first-stage three-section desander is preferably 380L-420L/min, more preferably 400L/min.
In the invention, the one-stage four-section sand remover adopts 2-4 low-concentration sand removers with the model number of NHS-1-2, which are well known by the technical personnel, in the invention, the slurry feeding pressure of the one-stage four-section sand remover is preferably 0.19-0.21 mPa, more preferably 0.20mPa, and the flow rate of the one-stage three-section sand remover is preferably 380L/min-420L/min, more preferably 400L/min.
According to the invention, the primary tailings are subjected to multi-stage treatment, the obtained good velvet is further recovered, and the fiber loss can be reduced to the lowest limit.
In the invention, the two-stage two-section desander preferably adopts 7-9 low-concentration desanders with models of NHS-1-5, which are well known to the technical personnel in the field, the pulp inlet pressure of the two-stage tailings through the two-stage two-section desander is preferably 0.27-0.29 mPa, more preferably 0.28mPa, and the flow rate of the two-stage tailings through the two-stage two-section desander is preferably 380L-420L/min, more preferably 400L/min.
In the invention, the second impurity removal process of the second tailings after passing through the second-stage sand remover is carried out through the first-stage third-stage sand remover and the first-stage fourth-stage sand remover, which is the same as the first impurity removal process of the first tailings after passing through the first-stage second-stage sand remover in the technical scheme, through the first-stage third-stage sand remover and the first-stage fourth-stage sand remover, and is not repeated herein. According to the invention, the secondary tailings are subjected to multi-stage treatment, the obtained good velvet is further recovered, and the fiber loss can be reduced to the lowest limit.
By adopting the purification treatment, the invention can remove heavy impurities in the slurry, has good impurity removal effect, and obtains the second-level good slurry with high sulfur value removal rate and whiteness increase value.
After the second fine pulp is obtained, dewatering and concentrating the obtained second-stage fine pulp to obtain pulp to be cooked; thereby completing the stock preparation process. In the present invention, the dewatering concentration is preferably carried out in a short-and-long-wire dewatering machine well known to those skilled in the art. In the present invention, the concentration of the dehydration concentration is preferably 8% to 12%, more preferably 9% to 11%. The invention can realize direct butt joint with a cooking system in actual production through the dehydration concentration process.
In addition, the obtained filtered water is recycled to the white water tank, and can be recycled after precipitation treatment; the present invention is not particularly limited in this regard.
The invention provides a material preparation method for cotton pulp production, which comprises the following steps: a) pulping and cutting cotton linters to obtain a pulp mixture; b) after the concentration of the slurry mixture obtained in the step a) is adjusted, purifying the slurry mixture by a second-stage four-section sand remover to respectively obtain second-stage good slurry and good velvet; c) dewatering and concentrating the second-stage good pulp obtained in the step b) to obtain the pulp to be cooked. Compared with the prior art, the material preparation method provided by the invention adopts a two-stage four-section desander to perform wet material preparation, has good impurity removal effect, reduces the COD value and chroma of wastewater generated in the subsequent cooking process, has small pollution load and reduces the difficulty of sewage treatment; on the other hand, less impurities reduce the cooking difficulty and the alkali amount in the cooking process, thereby reducing the damage of fiber, improving the polymerization degree and whiteness of the final product and reducing the angstrom degree.
In addition, the preparation method provided by the invention has strong processing capacity, can be matched with the existing cotton pulp production line, thereby realizing the application in large-scale industrial production and having wide development prospect.
In order to further illustrate the present invention, the following detailed description of the technical solutions provided by the present invention is provided with reference to examples. The raw materials used in the following examples of the present invention are all commercially available products; wherein, the used cotton linters are of New II type, the production area is Xinjiang, the sulfur value is 5.27 percent, and the ash content is 0.7 percent; the configuration of the two-stage four-stage sand remover used is shown in table 1.
TABLE 1 arrangement List of two-stage four-stage desanders used in the examples of the present invention
Example 1
(1) The method comprises the steps of unpacking cotton linters, opening the cotton linters by a cotton opener, then feeding the cotton linters into a dry type impurity removal system for dry type impurity removal, then feeding the cotton linters into a cyclone separator, adding water for spraying and presoaking, then feeding the cotton linters into a press screw, feeding the cotton linters into a cyclone semi-pulp machine by a screw conveyor, adding water for mixing until the concentration of pulp is 5 +/-1%, cutting and pulping to obtain a pulp mixture, and placing the pulp mixture in a storage tank.
(2) Pumping the slurry mixture obtained in the step (1) into a dilution slurry preparation tank from a storage tank for concentration adjustment, adjusting the slurry concentration to be 0.6% +/-0.1%, and then performing purification treatment through a secondary four-section desander, wherein the method specifically comprises the following steps: feeding the slurry with the concentration of 0.6% +/-0.1% into a first-stage desander to respectively obtain first-stage good slurry and first-stage tailings; wherein, the first-stage fine pulp enters a second-stage first-stage desander to respectively obtain second-stage fine pulp and second-stage tailings; wherein, the second-stage good pulp enters a short-long net dehydrator for dehydration and concentration to obtain slurry to be cooked with the concentration of 10 +/-1 percent, and the slurry is placed in a storage tank; the first-stage tailings are subjected to first impurity removal through a first-stage two-section desander, a first-stage three-section desander and a first-stage four-section desander in sequence, and good wool is recovered; the second-stage tailings are subjected to second impurity removal through a second-stage two-section desander, a first-stage three-section desander and a first-stage four-section desander in sequence, and good wool is recovered;
the operating process parameters of each stage of the two-stage four-stage desander are shown in the table 2.
Table 2 operating process parameters of each stage of the two-stage four-stage desander in example 1 of the present invention
| Stage section | First stage and first stage | Second stage first stage | Two stage | First stage and second stage | First stage and third stage | First stage four stages |
| Feed concentration/%) | 0.7 | 0.62 | 0.52 | 0.55 | 0.50 | 0.45 |
| Slurry concentration/%) | 0.92 | 0.71 | 0.9 | 0.99 | - | - |
| Feed pressure/mPa | 0.29 | 0.32 | 0.28 | 0.25 | 0.22 | 0.20 |
| Number of runs/number | 22 | 34 | 7 | 7 | 5 | 2 |
In addition, the obtained filtered water is recycled in the white water tank, and can be recycled after precipitation treatment.
Through detection, the impurity removal effect of the preparation method provided by the embodiment 1 of the invention is shown in table 3.
Table 3 impurity removal effect data of the material preparation method provided in embodiment 1 of the present invention
As can be seen from table 3, the feed preparation method provided in embodiment 1 of the present invention has a good impurity removal effect, and can reduce a pollution load and improve whiteness.
Carrying out cotton pulp production on the pulp to be steamed and boiled obtained by the material preparation method provided by the embodiment 1 of the invention to obtain a cotton pulp product; the cotton pulp production is completed on a horizontal pipe joint steaming production line (1# line), and the production line has the design yield of 60 tons/day; the processing capacity of the stock preparation method is 75 tons/day.
Comparative example
Unpacking the cotton linters, opening the cotton by a cotton opener, and then entering a dry type impurity removal system for dry type impurity removal to obtain prepared cotton linters; then cotton pulp production is carried out to obtain a cotton pulp product; the cotton pulp production is completed on a rotary spherical digester production line (2# line).
The comparative data of the cooking alkali and the main index of the product in the 1# line and the 2# line are shown in the table 4.
Comparative data of cooking alkali and main product indexes in lines 41 # and 2# in table
As can be seen from table 4, the method for preparing the material provided in embodiment 1 of the present invention has advantages of different degrees in the amount of alkali used for cooking, DP, whiteness and angstrom degree of the finished product; wherein, the alkali consumption is reduced by 2.99%, the polymerization Degree (DP) is averagely increased by 20, the angstrom degree is reduced by 51.66%, and the whiteness is improved by 1.4 degrees.
In addition, a decrease in the amount of alkali used marks a decrease in the pollution load of the waste water, as shown in Table 5.
TABLE 5 comparison data of pollution load for the stock preparation method provided in example 1 of the present invention and the conventional stock preparation method of the comparative example
In conclusion, the material preparation method provided by the invention has good impurity removal effect, reduces the COD value and chromaticity of the wastewater generated in the subsequent cooking process, has small pollution load and reduces the difficulty of sewage treatment; on the other hand, less impurities reduce the cooking difficulty and the alkali amount in the cooking process, thereby reducing the damage of fiber, improving the polymerization degree and whiteness of the final product and reducing the angstrom degree.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A material preparation method for cotton pulp production comprises the following steps:
a) pulping and cutting cotton linters to obtain a pulp mixture;
b) after the concentration of the slurry mixture obtained in the step a) is adjusted, purifying the slurry mixture by a second-stage four-section sand remover to respectively obtain second-stage good slurry and good velvet;
c) dewatering and concentrating the second-stage good pulp obtained in the step b) to obtain the pulp to be cooked.
2. The stock preparation method as recited in claim 1, wherein the cotton linters in step a) have a sulfur value of 4-10% and an ash content of 0.5-1.5%.
3. The stock preparation method as recited in claim 1, wherein the beating and cutting processes in the step a) are as follows:
opening cotton linters, then sequentially carrying out cotton opening and dry impurity removal, sending the cotton linters to a cyclone separator by wind, adding water for spraying and presoaking, then entering a pressing screw, conveying the cotton linters to a cyclone semi-pulp machine by a screw conveyor, adding water for mixing until the concentration of pulp is 3% -7%, and then cutting and pulping to obtain a pulp mixture.
4. The stock preparation method as recited in claim 1, wherein the concentration of the concentration-adjusted slurry in step b) is 0.4-0.8%.
5. The stock preparation method as recited in claim 1, wherein the purification treatment by the two-stage four-stage desander in the step b) is specifically:
feeding the slurry into a first-stage desander to respectively obtain first-stage good slurry and first-stage tailings; then the first-stage fine pulp enters a second-stage first-stage desander to respectively obtain second-stage fine pulp and second-stage tailings; simultaneously, sequentially carrying out first impurity removal on the primary tailings by a primary two-section desander, a primary three-section desander and a primary four-section desander to obtain fine hair;
and (4) carrying out secondary impurity removal on the secondary tailings sequentially through a secondary two-section desander, a primary three-section desander and a primary four-section desander to obtain the fine wool.
6. The stock preparation method as recited in claim 5, wherein the slurry enters the first-stage desander at a pressure of 0.28-0.30 mPa and a flow rate of 380L-420L/min.
7. The material preparation method of claim 5, wherein the pulp entering pressure of the first-stage good pulp entering the second-stage first-stage sand remover is 0.31-0.33 mPa, and the flow rate is 230L-270L/min.
8. The material preparation method of claim 5, wherein the slurry feeding pressure of the primary tailings passing through the primary two-stage sand remover is 0.24-0.26 mPa, and the flow rate is 380L-420L/min;
the slurry feeding pressure of the secondary tailings through the secondary two-stage sand remover is 0.27-0.29 mPa, and the flow rate is 380L-420L/min.
9. The material preparation method of claim 5, wherein the slurry feeding pressure of the primary three-section sand remover is 0.21-0.23 mPa, and the flow rate is 380L-420L/min;
the slurry inlet pressure of the first-stage four-section desander is 0.19-0.21 mPa, and the flow rate is 380L-420L/min.
10. The stock preparation method as recited in claim 1, wherein the concentration of the dehydration concentration in step c) is 8-12%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910004248.8A CN111395027A (en) | 2019-01-03 | 2019-01-03 | Material preparation method for cotton pulp production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910004248.8A CN111395027A (en) | 2019-01-03 | 2019-01-03 | Material preparation method for cotton pulp production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111395027A true CN111395027A (en) | 2020-07-10 |
Family
ID=71428302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910004248.8A Pending CN111395027A (en) | 2019-01-03 | 2019-01-03 | Material preparation method for cotton pulp production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111395027A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114657811A (en) * | 2022-02-18 | 2022-06-24 | 临清市正德短绒纸业有限公司 | Production process of cotton linter pulp |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH111883A (en) * | 1997-04-07 | 1999-01-06 | Oji Paper Co Ltd | Production of deinked pulp having high whiteness |
| US20040000012A1 (en) * | 2002-06-26 | 2004-01-01 | Borregaard Chemcell | Treatment of a mixture containing cellulose |
| CN101302725A (en) * | 2008-06-10 | 2008-11-12 | 山东银鹰化纤有限公司 | Process for producing cotton dissolving pulp |
| CN101328695A (en) * | 2008-06-10 | 2008-12-24 | 山东银鹰化纤有限公司 | Production process of cotton pulp for manufacturing automobile oil-gas filter parer |
| CN202730524U (en) * | 2012-06-11 | 2013-02-13 | 南通瑶华纤维有限公司 | Non-pulping continuous cleaning device for purified cotton pulp |
| CN204238065U (en) * | 2014-11-27 | 2015-04-01 | 合肥银山棉麻股份有限公司 | Cotton starch plate is produced with refinement concentration equipment |
| CN106192508A (en) * | 2016-07-07 | 2016-12-07 | 合肥银山棉麻股份有限公司 | Four sections of desanding new technologies of two-stage |
| CN107022915A (en) * | 2017-04-29 | 2017-08-08 | 东至县鸿棉工贸有限责任公司 | A kind of method for improving cotton pulp purity |
-
2019
- 2019-01-03 CN CN201910004248.8A patent/CN111395027A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH111883A (en) * | 1997-04-07 | 1999-01-06 | Oji Paper Co Ltd | Production of deinked pulp having high whiteness |
| US20040000012A1 (en) * | 2002-06-26 | 2004-01-01 | Borregaard Chemcell | Treatment of a mixture containing cellulose |
| CN101302725A (en) * | 2008-06-10 | 2008-11-12 | 山东银鹰化纤有限公司 | Process for producing cotton dissolving pulp |
| CN101328695A (en) * | 2008-06-10 | 2008-12-24 | 山东银鹰化纤有限公司 | Production process of cotton pulp for manufacturing automobile oil-gas filter parer |
| CN202730524U (en) * | 2012-06-11 | 2013-02-13 | 南通瑶华纤维有限公司 | Non-pulping continuous cleaning device for purified cotton pulp |
| CN204238065U (en) * | 2014-11-27 | 2015-04-01 | 合肥银山棉麻股份有限公司 | Cotton starch plate is produced with refinement concentration equipment |
| CN106192508A (en) * | 2016-07-07 | 2016-12-07 | 合肥银山棉麻股份有限公司 | Four sections of desanding new technologies of two-stage |
| CN107022915A (en) * | 2017-04-29 | 2017-08-08 | 东至县鸿棉工贸有限责任公司 | A kind of method for improving cotton pulp purity |
Non-Patent Citations (3)
| Title |
|---|
| 《棉花检验》编写组编: "《棉花检验》", 31 October 1979, 北京：中国财政经济出版社 * |
| 詹怀宇: "《制浆技术》", 30 September 2012, 北京：中国轻工业出版社 * |
| 许少石等: "《粘胶纤维浆粕制造》", 31 January 1983, 北京：纺织工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114657811A (en) * | 2022-02-18 | 2022-06-24 | 临清市正德短绒纸业有限公司 | Production process of cotton linter pulp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102677515A (en) | Process for preparing recovered pulp with high whiteness and high cleanliness | |
| CN1786340A (en) | Corrugated paper produced by steam blasting straw to pulp and its production method | |
| CN101921261A (en) | Process for separating and recovering behind a kind of imidacloprid synthesis | |
| CN111395027A (en) | Material preparation method for cotton pulp production | |
| CN208087577U (en) | A kind of plate and frame filter press for wine lees liquor processing | |
| CN104530243A (en) | Tapioca starch clean production method | |
| CN107287958B (en) | A kind of equipment of cotton linter bleaching preparation purified cotton | |
| CN104631183A (en) | Device for efficiently recovering fibers from papermaking factory, as well as method thereof | |
| CN103538131A (en) | Bast-stalk separation technique | |
| CN104592160B (en) | Method for multistage washing impurity removal of rubber vulcanizing accelerator TBBS | |
| CN201280533Y (en) | Tapioca starch production apparatus | |
| CN109208365B (en) | Pulp production equipment, pulping process and pulp production process | |
| CN205360985U (en) | Exhaust gas treating device | |
| CN101476256A (en) | Method for pre-extracting papermaking black liquid | |
| CN219231821U (en) | Countercurrent dialysis rinsing system | |
| CN115162052B (en) | High-flatness gray paperboard and preparation method thereof | |
| CN215654047U (en) | High-efficient edulcoration device is used in regeneration paper pulp production | |
| CN104088181A (en) | Method for extracting sap and pulping from paper mulberry branches and comprehensively utilizing paper mulberry branches | |
| WO2017166860A1 (en) | Method for producing brownstock pulp using straws | |
| CN205711533U (en) | The continuous recovery and processing system of waste paper slurry | |
| CN108191983A (en) | A kind of method that serialization washing process produces low ash content hydroxyethyl cellulose | |
| JP2014124158A (en) | Sugar recovery method from saccharification slurry and cleaning apparatus for cleaning residue | |
| CN204475038U (en) | A kind of device of paper mill high efficiente callback fiber | |
| CN1285359A (en) | Method and equipment for making starch | |
| CN202766905U (en) | Papermaking fine sieving system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200710 |
|
| RJ01 | Rejection of invention patent application after publication |