Production process of ultra-high-viscosity refined cotton

Abstract

The invention discloses a production process of ultra-high-viscosity refined cotton, and relates to the field of ultra-high-viscosity refined cotton processing technologies, and the production process comprises the steps of raw material selection, cotton opening treatment, dipping treatment, cooking treatment, bleaching treatment, desanding and dehydration, pressing and cutting treatment, crushing and drying, and sorting treatment. According to the production process of the ultra-high-viscosity refined cotton, when the raw materials are selected, impurities and dirt on the surfaces of the cotton linter raw materials can be effectively removed through impurity removal treatment, the influence of the impurities and the dirt on subsequent cotton opening treatment can be avoided, the use amount of the cotton linter raw materials can be effectively controlled through weighing treatment, waste of the cotton linter raw materials can be avoided, and the production cost of the ultra-high-viscosity refined cotton is reduced. According to pressing and cutting treatment, redundant moisture of the cotton linters is removed in a rolling mode, the effect of dewatering again can be achieved, follow-up drying treatment can be facilitated, the drying time can be shortened, the cotton linters can be extruded into sheets through rolling, then shearing treatment is conducted on the cotton linters through shearing equipment, and the toughness of the cotton linters can be improved through rolling and shearing.

Description

Technical Field

[0001] The invention relates to the field of ultra-high viscosity refined cotton processing technology, and in particular to a production technology of ultra-high viscosity refined cotton. Background Art

[0002] Ultra-high viscosity refined cotton is a cellulose material with high viscosity, high reactivity and low impurity characteristics. It is made of cotton linter and refined through a process. Ultra-high viscosity refined cotton is mainly used to produce high-end products such as capacitors and special paper. It has the characteristics of high whiteness, high reactivity and low impurities.

[0003] The existing ultra-high viscosity refined cotton processing process steps are material selection, cotton opening, impregnation, cooking, bleaching, dehydration, drying and crushing, but the existing process has certain disadvantages in the processing of ultra-high viscosity refined cotton;

[0004] Firstly, the existing processing technology will directly carry out cotton opening after material selection. Certain impurities will adhere to the surface of the selected cotton linters during transportation, and improper transportation will cause contamination on the surface of the cotton linters. Impurities and pollutants will easily affect the subsequent molding effect of cotton opening; secondly, the existing processing technology will directly carry out drying after dehydration, but the cotton linters will still contain a certain amount of moisture after dehydration. Direct drying takes a long time and is not convenient for subsequent crushing. In addition, the existing processing technology will directly package the refined cotton after crushing, but the refined cotton after crushing is of different sizes, which is not convenient for subsequent selection of suitable refined cotton for processing according to needs.

[0005] Therefore, we propose a production process of ultra-high viscosity refined cotton. Summary of the invention

[0006] The main purpose of the present invention is to provide a production process of ultra-high viscosity refined cotton, which can effectively solve the problems in the background technology.

[0007] To achieve the above-mentioned purpose, the technical scheme adopted by the present invention is: a production process of ultra-high viscosity refined cotton, including raw material selection, cotton opening treatment, impregnation treatment, cooking treatment, bleaching treatment, sand removal and dehydration, pressing and cutting treatment, crushing and drying and sorting treatment, the raw material selection includes impurity removal treatment and weighing treatment, the impurity removal treatment is to remove impurities on the surface of the selected mature cotton linter raw materials to remove impurities attached to the surface of the cotton linter raw materials, the weighing treatment is to weigh and prepare the cotton linter raw materials that have been impurity-removed according to processing requirements, and the cotton opening treatment is to put the weighed cotton linter raw materials into a cotton opener for cotton opening treatment, and the scattered lint cotton needs to be collected during the cotton opening.

[0008] Preferably, the impregnation treatment is to first prepare a hydrochloric acid treatment solution with a concentration of 0.1% to 0.3%, and then spray the hydrochloric acid treatment solution with a concentration of 0.1% to 0.3% onto the cotton linters after opening the cotton, and then put the cotton linters into a reactor containing an alkaline activation solution for stirring and activation, and the stirring time is 40-70 minutes.

[0009] Preferably, the cooking treatment is to add the activated cotton linters into a reaction kettle containing a cooking liquid for cooking, the cooking temperature is 110-150° C., the content of sodium hydroxide in the cooking liquid is 25 g / l, and the cooking time is 25-35 minutes.

[0010] Preferably, the bleaching treatment is to wash the boiled absorbent cotton with water, then add sodium hypochlorite with a mass concentration of 0.2% for pre-bleaching for 60 minutes, then wash the bleached absorbent cotton with water for 30 minutes, and finally add hydrogen peroxide with a mass concentration of 0.3-0.5% for bleaching, and the bleaching time is 30 minutes.

[0011] Preferably, the desanding and dehydrating is to desand the bleached cotton linters and then dehydrate them using a centrifugal dehydration device for about 40-60 minutes.

[0012] Preferably, the pressing and cutting treatment includes extrusion dehydration and cutting treatment. Extrusion dehydration is to roll the cotton linters after centrifugal dehydration to remove the remaining water by rolling, so as to squeeze the cotton linters into sheets.

[0013] Preferably, the cutting process is to convey the sheet-like cotton linters to a shearing device, and then cut them into pieces by the shearing device to form cotton strips about 3-6 cm in length.

[0014] Preferably, the pulverizing and drying is to break up the chopped cotton linters in a pulverizer, and then crush and dry them to finally obtain a finished product.

[0015] Preferably, the sorting process is to screen the finished refined cotton, distinguish the refined cotton of different sizes, and then pack them independently.

[0016] Preferably, the production process of the ultra-high viscosity refined cotton comprises the following steps:

[0017] S1, firstly selecting mature cotton linters as raw materials, then performing surface impurity removal treatment on the cotton linters raw materials to remove impurities attached to the surface of the cotton linters raw materials, and then weighing the impurity-removed cotton linters raw materials according to processing requirements;

[0018] S2, then the weighed cotton linters are transported to a cotton opener for opening, and the scattered linters need to be collected during the opening process;

[0019] S3, then prepare a hydrochloric acid treatment solution with a concentration of about 0.1% to 0.3%, spray the hydrochloric acid treatment solution onto the cotton linters after opening, and then put the cotton linters into a reactor containing an alkaline activation solution for stirring and activation, and the stirring time is 40-70 minutes;

[0020] S4, then putting the activated cotton linters into a reaction kettle containing a cooking liquid for cooking, the cooking temperature is 110-150° C., the content of sodium hydroxide in the cooking liquid is 25 g / l, and the cooking time is 25-35 minutes;

[0021] S5, after the steaming is completed, the steamed absorbent cotton is subjected to a first water washing treatment, and then sodium hypochlorite with a mass concentration of 0.2% is added for pre-bleaching for 60 minutes, and then the bleached absorbent cotton is subjected to a second water washing treatment for 30 minutes, and finally hydrogen peroxide with a mass concentration of 0.3-0.5% is added for bleaching for 30 minutes;

[0022] S6, then subjecting the bleached cotton linters to a centrifugal sand removal process, and dehydrating the cotton linters during the centrifugal process for about 40-60 minutes;

[0023] S7, after dehydration is completed, the cotton linters can be rolled by a rolling device to remove the remaining water by rolling, so that the cotton linters are squeezed into sheets, and then the sheets of cotton linters are transported to a shearing device, and then chopped by the shearing device to form cotton strips about 3-6CM long;

[0024] S8, breaking up the chopped cotton linters in a pulverizer, and then rolling and drying the broken linters to finally obtain a finished product;

[0025] S9, the finished refined cotton is then screened, the refined cotton of different sizes is distinguished, and then packaged separately.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] When selecting raw materials, the impurities and dirt on the surface of the cotton linter raw materials can be effectively removed through the impurity removal treatment, which can prevent the impurities and dirt from affecting the subsequent cotton opening process. The weighing process can effectively control the use of the cotton linter raw materials and avoid wasting the cotton linter raw materials. The pressing and cutting process removes excess moisture from the cotton linter by rolling, which can have the effect of dehydration again, facilitate subsequent drying treatment, shorten the drying time, and squeeze the cotton linter into sheets through rolling, which are then sheared by shearing equipment. The freeness of the cotton linter can be improved by rolling and shearing. The sorting process can screen the refined cotton that has been broken up and formed, which is convenient for independent packaging of refined cotton of different sizes and subsequent use as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0029] Figure 2 Schematic diagram of the process for selecting raw materials of the present invention;

[0030] Figure 3 It is a schematic diagram of the process of the pressing and cutting process of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1-3 As shown, a production process of ultra-high viscosity refined cotton provided by an embodiment of the present invention includes raw material selection, cotton opening treatment, impregnation treatment, cooking treatment, bleaching treatment, sand removal and dehydration, pressing and cutting treatment, crushing and drying and sorting treatment. The raw material selection includes impurity removal treatment and weighing treatment. The impurity removal treatment is to remove impurities from the surface of selected mature cotton linter raw materials to remove impurities attached to the surface of the cotton linter raw materials. The weighing treatment is to weigh the cotton linter raw materials that have been impurity-removed according to processing requirements for material preparation. The cotton opening treatment is to put the weighed cotton linter raw materials into a cotton opener for cotton opening treatment. When opening the cotton, the scattered lint cotton needs to be collected. When selecting the raw materials, the impurities and dirt on the surface of the cotton linter raw materials can be effectively removed by the impurity removal treatment, which can prevent the impurities and dirt from affecting the subsequent cotton opening treatment. The use amount of the cotton linter raw materials can be effectively controlled by the weighing treatment, which can avoid wasting the cotton linter raw materials.

[0033] The present invention provides a production process for ultra-high viscosity refined cotton. When raw materials are selected, impurities and dirt on the surface of the cotton linter raw materials can be effectively removed through impurity removal treatment, which can prevent the impurities and dirt from affecting subsequent cotton opening treatment. The use amount of the cotton linter raw materials can be effectively controlled through weighing treatment, which can avoid wasting the cotton linter raw materials.

[0034] In one embodiment provided by the present invention, the impregnation treatment is to first prepare a hydrochloric acid treatment solution with a concentration of 0.1% to 0.3%, and then spray the hydrochloric acid treatment solution with a concentration of 0.1% to 0.3% onto the cotton linters after the cotton is opened, and then put the cotton linters into a reactor containing an alkaline activation solution for stirring and activation, and the stirring time is 40-70 minutes. The impregnation treatment mainly relies on the activation reaction to improve the stability of the cotton linters.

[0035] In another embodiment provided by the present invention, the cooking treatment is to add the activated cotton linters into a reactor containing a cooking liquid for cooking, the cooking temperature is 110-150°C, the content of sodium hydroxide in the cooking liquid is 25g / l, and the cooking time is 25-35 minutes. The cooking treatment can make the cellulose structure of the cotton linters more stable, thereby improving the purity and quality of the product.

[0036] In another embodiment provided by the present invention, the bleaching treatment is to wash the boiled absorbent cotton with water, then add sodium hypochlorite with a mass concentration of 0.2% for pre-bleaching for 60 minutes, then wash the bleached absorbent cotton with water for 30 minutes, and finally add hydrogen peroxide with a mass concentration of 0.3-0.5% for bleaching, and the bleaching time is 30 minutes. The bleaching treatment is to remove pigments and impurities in the cotton linters, and can improve the purity of the cotton linters.

[0037] In one embodiment provided by the present invention, the desanding and dehydrating is to desand the bleached cotton linters and then use a centrifugal dehydration device to dehydrate for about 40-60 minutes. The desanding and dehydrating is mainly to remove impurities and remove moisture by centrifugation.

[0038] In another embodiment provided by the present invention, the pressing and cutting treatment includes extrusion dehydration and cutting treatment. The extrusion dehydration is to roll the cotton linters after centrifugal dehydration to remove the remaining water by rolling and squeeze the cotton linters into sheets. The pressing and cutting treatment is to remove the excess water of the cotton linters by rolling, which can achieve the effect of dehydration again, facilitate the subsequent drying treatment, shorten the drying time, and squeeze the cotton linters into sheets by rolling, and then shear them through a shearing device. The shearing by rolling can improve the freeness of the cotton linters.

[0039] In another embodiment provided by the present invention, the cutting process is to convey the sheet-like cotton linters to a shearing device, and then cut them into pieces by the shearing device to form cotton strips about 3-6 cm long. The cotton linters in the shape of cotton strips can be easily crushed and dispersed later.

[0040] In one embodiment provided by the present invention, the pulverizing and drying is to break up the chopped cotton linters in a pulverizer, and then crush and dry them after breaking up to finally obtain a finished product. The pulverizing and breaking up can facilitate the drying process.

[0041] In another embodiment provided by the present invention, the sorting process is to screen the finished refined cotton, distinguish the refined cotton of different sizes, and then pack them independently. The sorting process can screen the refined cotton that has been broken up and formed, which is convenient for independent packaging of refined cotton of different sizes and for subsequent use according to needs.

[0042] A production process of ultra-high viscosity refined cotton comprises the following steps:

[0043] S1, firstly selecting mature cotton linters as raw materials, then performing surface impurity removal treatment on the cotton linters raw materials to remove impurities attached to the surface of the cotton linters raw materials, and then weighing the impurity-removed cotton linters raw materials according to processing requirements;

[0044] S2, then the weighed cotton linters are transported to a cotton opener for opening, and the scattered linters need to be collected during the opening process;

[0045] S3, then prepare a hydrochloric acid treatment solution with a concentration of about 0.1% to 0.3%, spray the hydrochloric acid treatment solution onto the cotton linters after opening, and then put the cotton linters into a reactor containing an alkaline activation solution for stirring and activation, and the stirring time is 40-70 minutes;

[0046] S4, then putting the activated cotton linters into a reaction kettle containing a cooking liquid for cooking, the cooking temperature is 110-150° C., the content of sodium hydroxide in the cooking liquid is 25 g / l, and the cooking time is 25-35 minutes;

[0047] S5, after the steaming is completed, the steamed absorbent cotton is subjected to a first water washing treatment, and then sodium hypochlorite with a mass concentration of 0.2% is added for pre-bleaching for 60 minutes, and then the bleached absorbent cotton is subjected to a second water washing treatment for 30 minutes, and finally hydrogen peroxide with a mass concentration of 0.3-0.5% is added for bleaching for 30 minutes;

[0048] S6, then subjecting the bleached cotton linters to a centrifugal sand removal process, and dehydrating the cotton linters during the centrifugal process for about 40-60 minutes;

[0049] S7, after dehydration is completed, the cotton linters can be rolled by a rolling device to remove the remaining water by rolling, so that the cotton linters are squeezed into sheets, and then the sheets of cotton linters are transported to a shearing device, and then chopped by the shearing device to form cotton strips about 3-6CM long;

[0050] S8, breaking up the chopped cotton linters in a pulverizer, and then rolling and drying the broken linters to finally obtain a finished product;

[0051] S9, the finished refined cotton is then screened, the refined cotton of different sizes is distinguished, and then packaged separately.

[0052] It should be noted that the present invention is a production process for ultra-high viscosity refined cotton, firstly, mature cotton linters are selected as raw materials, and then the surface of the cotton linters raw materials is treated to remove impurities, and then the cotton linters raw materials are weighed according to needs to avoid waste of raw materials and facilitate proportioning, and then the weighed cotton linters raw materials are transported to a cotton opener for opening treatment, and the opened cotton linters are sprayed with a hydrochloric acid treatment solution with a concentration of about 0.1% to 0.3%, and after standing for a period of time, the cotton linters can be put into a reactor containing an alkaline activation solution for stirring and activation, and the stirring time is 40-70 minutes, and the cotton linters can be put into a reactor containing an alkaline activation solution for stirring and activation, and the stirring time is 40-70 minutes. After the steaming is completed, the steamed absorbent cotton is washed for the first time, and then sodium hypochlorite with a mass concentration of 0.2% is added for pre-bleaching for 60 minutes, and then the bleached absorbent cotton is further The second washing treatment is carried out for 30 minutes, and finally, hydrogen peroxide with a mass concentration of 0.3-0.5% is added for bleaching, and the bleaching time is 30 minutes. Then, the bleached cotton linters are subjected to centrifugal sand removal treatment, and the cotton linters are dehydrated during the centrifugal treatment, and the dehydration takes about 40-60 minutes. After the dehydration is completed, the cotton linters can be rolled by a rolling device to remove the remaining water by rolling, and the cotton linters are squeezed into sheets, and then the sheet-like cotton linters are transported to a shearing device, and then chopped by the shearing device to form cotton strips about 3-6CM long, and then the cotton linters can be rolled by a rolling device to remove the remaining water by rolling, and the cotton linters are squeezed into sheets, and then the sheet-like cotton linters are transported to a shearing device, and then chopped by the shearing device to form cotton strips about 3-6CM long, and then the finished refined cotton is sieved, and the refined cotton of different sizes is distinguished, and then it is packaged independently, which is more practical.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A production process for ultra-high viscosity refined cotton, characterized in that: Raw material selection, cotton opening, impregnation, cooking, bleaching, sand removal and dehydration, pressing and cutting, crushing, drying and sorting; The raw material selection includes impurity removal and weighing. The impurity removal is to remove impurities from the surface of selected mature cotton linter raw materials to remove impurities attached to the surface of the cotton linter raw materials. The weighing is to weigh and prepare the cotton linter raw materials that have been impurity-removed according to processing requirements. The cotton opening process is to put the weighed cotton linter raw materials into a cotton opener for cotton opening. When opening the cotton, the scattered lint cotton needs to be collected.

2. The production process of ultra-high viscosity refined cotton according to claim 1, characterized in that: The impregnation treatment is to first prepare a hydrochloric acid treatment solution with a concentration of 0.1% to 0.3%, and then spray the hydrochloric acid treatment solution with a concentration of 0.1% to 0.3% on the cotton linters after opening the cotton, and then put the cotton linters into a reactor containing an alkaline activation solution for stirring and activation, and the stirring time is 40-70 minutes.

3. The production process of ultra-high viscosity refined cotton according to claim 1, characterized in that: The cooking treatment is to add the activated cotton linters into a reaction kettle containing cooking liquid for cooking, the cooking temperature is 110-150° C., the content of sodium hydroxide in the cooking liquid is 25 g / l, and the cooking time is 25-35 minutes.

4. The production process of ultra-high viscosity refined cotton according to claim 1, characterized in that: The bleaching treatment is to wash the boiled absorbent cotton with water, then add sodium hypochlorite with a mass concentration of 0.2% for pre-bleaching for 60 minutes, then wash the bleached absorbent cotton with water for 30 minutes, and finally add hydrogen peroxide with a mass concentration of 0.3-0.5% for bleaching, and the bleaching time is 30 minutes.

5. The production process of ultra-high viscosity refined cotton according to claim 1, characterized in that: The desanding and dehydrating process is to desand the bleached cotton linters and then use a centrifugal dehydration device to dehydrate for about 40-60 minutes.

6. The production process of ultra-high viscosity refined cotton according to claim 1, characterized in that: The pressing and cutting treatment includes extrusion dehydration and cutting treatment. The extrusion dehydration is to roll the cotton linters after centrifugal dehydration to remove the remaining water by rolling, so that the cotton linters are squeezed into sheets.

7. The production process of ultra-high viscosity refined cotton according to claim 6, characterized in that: The cutting process is to convey the sheet-like cotton linters to a shearing device, and then cut them into pieces by the shearing device to form cotton strips about 3-6 cm long.

8. The production process of ultra-high viscosity refined cotton according to claim 1, characterized in that: The crushing and drying process is to break up the chopped cotton linters in a crusher, and then crush and dry them to obtain the finished product.

9. The production process of ultra-high viscosity refined cotton according to claim 1, characterized in that: The sorting process is to screen the finished refined cotton, distinguish the refined cotton of different sizes, and then pack them independently.

10. A production process for ultra-high viscosity refined cotton according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, firstly selecting mature cotton linters as raw materials, then performing surface impurity removal treatment on the cotton linters raw materials to remove impurities attached to the surface of the cotton linters raw materials, and then weighing the impurity-removed cotton linters raw materials according to processing requirements; S2, then the weighed cotton linters are transported to a cotton opener for opening, and the scattered linters need to be collected during the opening process; S3, then prepare a hydrochloric acid treatment solution with a concentration of about 0.1% to 0.3%, spray the hydrochloric acid treatment solution onto the cotton linters after opening, and then put the cotton linters into a reactor containing an alkaline activation solution for stirring and activation, and the stirring time is 40-70 minutes; S4, then putting the activated cotton linters into a reaction kettle containing a cooking liquid for cooking, the cooking temperature is 110-150° C., the content of sodium hydroxide in the cooking liquid is 25 g / l, and the cooking time is 25-35 minutes; S5, after the steaming is completed, the steamed absorbent cotton is subjected to a first water washing treatment, and then sodium hypochlorite with a mass concentration of 0.2% is added for pre-bleaching for 60 minutes, and then the bleached absorbent cotton is subjected to a second water washing treatment for 30 minutes, and finally hydrogen peroxide with a mass concentration of 0.3-0.5% is added for bleaching for 30 minutes; S6, then subjecting the bleached cotton linters to a centrifugal sand removal process, and dehydrating the cotton linters during the centrifugal process for about 40-60 minutes; S7, after dehydration is completed, the cotton linters can be rolled by a rolling device to remove the remaining water by rolling, so that the cotton linters are squeezed into sheets, and then the sheets of cotton linters are transported to a shearing device, and then chopped by the shearing device to form cotton strips about 3-6CM long; S8, breaking up the chopped cotton linters in a pulverizer, and then rolling and drying the broken linters to finally obtain a finished product; S9, the finished refined cotton is then screened, the refined cotton of different sizes is distinguished, and then packaged separately.

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