System for preparing wet pulp for viscose fiber from waste pure cotton textile fabric

Abstract

The utility model relates to a system for preparing wet pulp for viscose fibers from waste pure cotton textile fabrics. The system comprises a rotary boiling kettle, a centrifugal dehydrator, an elution all-in-one machine, a beating machine, an iron removal stirring tank and a decoloring solution recovery tank, a discharging hole of the rotary boiling kettle is communicated with a feeding hole of the centrifugal dehydrator through a quick connection hose; a liquid outlet of the centrifugal dehydrator is communicated with a decoloring liquid recovery tank through a first recovery pipe, the decoloring liquid recovery tank is communicated with the rotary boiling kettle through a second recovery pipe, and a water pump is arranged on the second recovery pipe; a discharge hole of the beating machine and a discharge hole of the iron removal stirring tank are communicated with the centrifugal dehydrator through slurry pipes; and slurry pumps are arranged on the slurry pipes. The decolored, activated and deironed fibers are dewatered by the centrifugal machine, so that the use amount of washing water is greatly reduced, the purpose of environment-friendly pulping is achieved, the boiled fibers can be dewatered by the centrifugal machine, the decolored decoloring solution is collected and recycled, and the consumption of the decoloring solution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of textile material processing, in particular to a system for preparing wet pulp for viscose fibers from waste pure cotton textiles. Background Art

[0002] Currently, the primary equipment used in viscose fiber pulp production is largely the same as that used in the papermaking industry. For example, cotton linters are steamed using a ball mill, pulped using a Dutch beater, and cotton pulp bleached using a bleaching machine. The bleaching machine primarily consists of a bleaching tank, a propeller, and a washing drum. During bleaching, the propeller propels the pulp through circulation. During rinsing, water is added to the bleaching tank, and the washing drum gradually replaces the water in the tank, achieving a clean, fresh pulp. To ensure bleaching effectiveness, an excess of bleaching and decolorizing solution must be added. However, this bleaching and washing method consumes excessive water and lacks the ability to reuse the bleaching and decolorizing solution, which is detrimental to the concept of environmentally friendly pulping. Therefore, a new system for producing viscose fiber wet pulp from waste cotton textiles has been developed. This system utilizes a novel sequential batch bleaching and rinsing system. Compared to traditional production equipment, it reduces pulping water and bleaching and decolorizing solution consumption, achieving environmentally friendly pulping. Utility Model Content

[0003] In order to solve the problems existing in the above-mentioned technologies, the utility model provides a system for preparing wet pulp for viscose fiber from waste pure cotton textiles, comprising a rotary scouring kettle, a centrifugal dehydrator, a washing and desiccant integrated machine, a beating machine, an iron removal stirring tank and a decolorizing liquid recovery tank;

[0004] The discharge port of the rotary scouring kettle is connected to the feed port of the centrifugal dehydrator through a quick-connect hose;

[0005] The liquid discharge port of the centrifugal dehydrator is connected to the decolorizing liquid recovery tank through a first recovery pipe, and the decolorizing liquid recovery tank is connected to the rotary scouring kettle through a second recovery pipe. A water pump is provided on the second recovery pipe.

[0006] The discharge port of the beater and the discharge port of the iron removal stirring tank are both connected to the centrifugal dehydrator through a slurry pipe, and a slurry pump is provided on the slurry pipe.

[0007] Wherein, it also includes a waste liquid tank, and the discharge port of the iron removal stirring tank and the discharge port of the washing and dehydrating machine are connected to the waste liquid tank through a waste liquid pipe.

[0008] Wherein, it also includes a waste liquid tank and a branch pipe, one end of the branch pipe is connected to the first recovery pipe, and the other end of the branch pipe is connected to the waste liquid tank.

[0009] This also includes an opener.

[0010] It also includes a water supply pipe for supplying water to the rotary smelting kettle, the beater and the iron removal stirring tank.

[0011] Wherein, an automatic dosing machine is arranged on the iron removal stirring tank and / or the rotary smelting kettle.

[0012] The beneficial effects of the utility model are:

[0013] The combined use of a rotary scouring kettle, a centrifugal dewatering machine, a washing and dewatering machine, a beater, and a deironing agitator achieves a sequential batch decolorization and activation, beating, deironing, and corresponding rinsing process. Combined with the opening of waste cotton textile raw materials, this achieves the goal of using waste cotton textiles to produce wet pulp for viscose fiber. Decolorization, activation, and deironing are followed by dewatering the fibers using a centrifuge. Compared to the traditional pulping industry's pulp rinsing process of drum washing and replacement in a bleaching tank, this significantly reduces the amount of washing water used, achieving the goal of environmentally friendly pulping. The scouring fibers are dewatered using a centrifuge, and the decolorized liquid is collected and reused in a decolorizing liquid recovery tank, reducing decolorizing liquid consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 It is a schematic diagram of the present utility model.

[0016] Description of Reference Numerals

[0017] 1. Rotary scouring kettle, 11. Quick-connect hose, 2. Centrifugal dehydrator, 21. First recovery pipe, 22. Branch pipe, 3. Washing and dehydrating machine, 4. Beater, 5. Iron removal mixing tank, 6. Slurry pipe, 61. Slurry pump, 7. Waste liquid tank, 71. Waste liquid pipe, 8. Decolorization liquid recovery tank, 81. Second recovery pipe, 82. Water pump, 9. Opener, 10. Valve. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] like Figure 1As shown in the figure, a system for preparing wet pulp for viscose fiber from waste pure cotton textiles provided in an embodiment includes a rotary scouring kettle 1, a centrifugal dehydrator 2, a washing and dehydrating machine 3, a beating machine 4, an iron removal stirring tank 5, an opener 9, a decolorizing liquid recovery tank 8 and a waste liquid tank 7;

[0020] The rotary smelting kettle 1 is connected to a water supply pipe (not shown), the beater 4 is connected to a water supply pipe, and the iron removal stirring tank 5 is connected to a water supply pipe.

[0021] The opener 9 uses a high-speed rotating striking mechanism to tear and loosen the textile with a woven structure to form loose fibers, which is convenient for subsequent steps to process the raw materials.

[0022] The rotary scouring vessel 1 is a rotary stirring device made of 304 stainless steel. Because the fibers being opened are long, stirring with a paddle would cause them to entangle the stirring shaft. Therefore, a rotary stirring mechanism is used. The bleaching agent can be added manually or with an automatic dosing machine. Due to the large amount of clean water required, a water supply pipe with a valve 10 is used for direct delivery. The bleaching solution is prepared by mixing clean water and the bleaching agent in a specific ratio and preheating it in the rotary scouring vessel 1. The bottom discharge port of the rotary scouring vessel 1 is connected to a quick-connect hose 11 with a quick-release connector, which connects to the centrifugal dehydrator 2. The discharge is then gravity-fed into the centrifugal dehydrator 2. The quick-connect hose 11 is used because the discharge port rotates with the rotary scouring vessel 1 during operation, making it difficult to connect to the discharge pipe. The quick-connect hose 11 facilitates assembly and disassembly.

[0023] Centrifugal dehydrator 2: The material-contacting portion is made of 316 stainless steel. During centrifugal dehydrator 2 feeding, a 300-mesh polypropylene filter bag is installed in the chamber. This traps fibers during dehydration while allowing the filtrate to pass through. The discharge port of centrifugal dehydrator 2 is connected to the bleaching liquid recovery tank 8 via a first recovery pipe 21 equipped with a valve 10 to recover the bleaching liquid. A branch pipe 22 equipped with a valve 10 is connected to the first recovery pipe 21. The dried material is placed in the filter bag, sealed, and manually fed into the washing and dehydrating machine 3. The bleaching liquid recovery tank 8 is connected to the rotary scouring kettle 1 via a second recovery pipe 81, which is equipped with a water pump 82.

[0024] Washing and dehydrating machine 3: Washing and dehydrating machine 3 has washing and dehydrating functions. It automatically adds water and runs under program control. It can wash and dry the slurry containing chemical substances, and manually take and put materials.

[0025] Beater 4: The beater 4 is preferably a Wall-E beater, and the discharge port is connected to the centrifugal dehydrator 2 through a slurry pipe 6 provided with a slurry pump 61. The slurry pump 61 transports the discharge of the beater 4 to the centrifugal dehydrator 2 for centrifugal dehydration.

[0026] Deironing agitator tank 5: The inner tank is made of 304 stainless steel, and the interior of the kettle is lined with polytetrafluoroethylene; the agitator is coated with polytetrafluoroethylene or enamel. The discharge port of the deironing agitator tank is connected to the centrifugal dehydrator 2 through a slurry pipe 6 equipped with a slurry pump 61. The slurry pump 61 transports the discharge of the deironing agitator tank 5 to the centrifugal dehydrator 2 for centrifugal dehydration. The deironing agent can be added manually or using an automatic dosing machine in the prior art. Due to the large amount of clean water required, it is directly transported using a water pipe. The deironing liquid is prepared with clean water and deironing agent in a certain proportion and preheated in the deironing agitator tank 5.

[0027] Waste liquid tank 7: The discharge port of the iron removal stirring tank 5 and the discharge port of the washing and dehydrating machine 3 are both connected to the waste liquid tank 7 through a waste liquid pipe 71, and the end of the branch pipe 22 away from the first recovery pipe 21 is connected to the waste liquid tank 7.

[0028] The use process of this utility model is as follows:

[0029] Manually remove buttons, zippers and other accessories from pure cotton waste fabrics, and then use an opener 9 to open the fabric into fibers; use a rotary scouring kettle 1 to immerse the fibers in a decolorizing solution for a rotary reaction to obtain decolorized and activated fibers; the decolorizing solution consists of sodium hypochlorite, sodium hydroxide, sodium pyrophosphate and water; the rotary scouring kettle 1 discharges the materials into a centrifugal dehydrator 2 for fiber drying, wherein the decolorizing solution is temporarily stored in a decolorizing solution recovery tank 8 and then transported to the rotary scouring kettle 1 through a second recovery pipe 81 for reuse, and the fibers are manually fed into a washing and dehydrating machine 3 for washing and dehydration; the washed fibers are manually fed into a beating machine The pulping machine 4 adds clean water for pulping, and the pulping-completed slurry is sent to the centrifugal dehydrator 2 again through the slurry pump 61 for drying, and the liquid enters the waste liquid tank 7, and then the fiber is manually sent to the iron removal stirring tank 5 for stirring reaction to remove the metal ions in the fiber. The iron removal liquid is composed of sulfuric acid, disodium ethylenediaminetetraacetic acid, sodium hexametaphosphate and water, and the iron removal waste liquid enters the waste liquid tank 7; the iron removal-completed slurry is sent to the centrifugal dehydrator 2 again through the slurry pump 61 for drying, and the liquid enters the waste liquid tank 7, and the fiber is manually sent to the washing and dehydrating machine 3 for washing and dehydration, and wet pulp is obtained.

[0030] In one embodiment, the specific models of the various devices are as follows:

[0031] Opening machine 9: Model: HW-04-102D, manufacturer: Qufu Havaluo Machinery Equipment Co., Ltd.

[0032] Rotary scouring kettle 1: Model: ZLF-400, manufacturer: Zhejiang Senbo Machinery Technology Co., Ltd.

[0033] Centrifugal dehydrator 2: Model: SS753-600, manufacturer: Shanghai Lijie Technology Equipment Co., Ltd.

[0034] Washing and drying machine 3: Model: XTH-15, manufacturer: Shanghai Lijie Technology Equipment Co., Ltd.

[0035] Beater 4: Model: ZY-DJ-300, manufacturer: Shandong Zhongyi Instrument Co., Ltd.

[0036] Iron removal mixing tank 5: Model: JPG-700-00, manufacturer: Zhejiang Senbo Machinery Technology Co., Ltd.

[0037] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A system for preparing wet pulp for viscose fiber from waste pure cotton textiles, characterized in that: It includes a rotary scouring kettle, a centrifugal dehydrator, a washing and decolorizing machine, a pulping machine, an iron removal mixing tank and a bleaching liquid recovery tank; The discharge port of the rotary scouring kettle is connected to the feed port of the centrifugal dehydrator through a quick-connect hose; The liquid discharge port of the centrifugal dehydrator is connected to the decolorizing liquid recovery tank through a first recovery pipe, and the decolorizing liquid recovery tank is connected to the rotary scouring kettle through a second recovery pipe. A water pump is provided on the second recovery pipe. The discharge port of the beater and the discharge port of the iron removal stirring tank are both connected to the centrifugal dehydrator through a slurry pipe, and a slurry pump is provided on the slurry pipe.

2. The system for preparing wet pulp for viscose fiber from waste pure cotton textiles according to claim 1, characterized in that: It also includes a waste liquid tank, and the discharge port of the iron removal stirring tank and the discharge port of the washing and dehydrating machine are connected to the waste liquid tank through a waste liquid pipe.

3. The system for preparing wet pulp for viscose fiber from waste pure cotton textiles according to claim 1, characterized in that: It also includes a waste liquid tank and a branch pipe, one end of the branch pipe is connected to the first recovery pipe, and the other end of the branch pipe is connected to the waste liquid tank.

4. A system for preparing wet pulp for viscose fiber from waste pure cotton textiles according to any one of claims 1 to 3, characterized in that: Also includes opener.

5. The system for preparing wet pulp for viscose fiber from waste pure cotton textiles according to claim 4, characterized in that: It also includes a water supply pipe for supplying water to the rotary scouring kettle, the beater and the iron removal stirring tank.

6. The system for preparing wet pulp for viscose fiber from waste pure cotton textiles according to claim 5, characterized in that: An automatic dosing machine is provided on the iron removal stirring tank and / or the rotary smelting kettle.

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