Waste rubber recovery system for short fiber production

Abstract

The utility model relates to the technical field of viscose fiber production, in particular to a waste glue recovery system for short fiber production. Comprising a filtering device, a waste glue treatment device and a waste residue treatment device, the filtering device is connected with the waste glue treatment device, and the waste glue treatment device is connected with the waste residue treatment device; the filtering device comprises first filtering equipment, a first waste glue filtering machine, second filtering equipment and a second waste glue filtering machine; the first filtering equipment is connected with the first waste glue filtering machine to filter waste glue generated by the first filtering equipment, and the first filtering equipment is connected with the second filtering equipment; the second filtering equipment is connected with the second waste glue filtering machine and is used for filtering waste glue generated by the second filtering equipment and conveying the filtered glue back to the second filtering equipment; the second waste glue filter and the first waste glue filter are both connected with the waste glue treatment device; the system has the advantages that the pressure of a first filter is reduced, and the influence on the viscose ripening degree of the whole production system is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of viscose fiber production, in particular to a waste glue recovery system for short fiber production. BACKGROUND

[0002] With the continuous strengthening of environmental protection requirements in the short fiber industry, the waste glue recovery and utilization of the first, second and third KKF in the viscose short fiber production process is currently an urgent matter. Meanwhile, in the preparation process of viscose fiber, a large amount of waste glue is generated in the viscose filtration. In order to reduce waste and cost, the recovery and utilization of waste glue is an essential link. However, due to different ripening degrees and inconsistent recovery points, the recovery and utilization of waste glue at different levels may cause quality problems in the entire production line. Therefore, the step-by-step recovery and utilization of waste glue and the recovery and reuse of waste residue after waste glue dilution are necessary for each viscose production enterprise.

[0003] At present, the viscose preparation enterprises generally use the waste glue generated by the first KKF filter to enter the waste glue KKF, the waste glue generated by the second and third KKF filters to enter the first glue supply tank, the good glue of the waste glue KKF filter to enter the first KKF filter, and the waste glue to enter the waste glue dilution, and then return to the yellowing for reuse through the sand remover, plate frame filter and centrifuge. In this method, the waste glue generated by the second and third KKF has been ripened for a long time, and the viscose ripening degree is already very low. Therefore, the waste glue is re-entered into the first glue supply tank, which greatly affects the viscose ripening degree of the entire production system and is not conducive to the subsequent spinning.

[0004] For example, a Chinese patent with the application number 201510864008.7 and the application date of December 1, 2015, and the patent name of “A recovery method for waste glue in viscose production” discloses the following technical solution: the method comprises the following steps: A, waste glue pretreatment: adding alkali solution to the waste glue to make the alkali content in the waste glue 6-8%, and the filtration speed is 45-55 mL / min; B, waste glue filtration recovery: the waste glue obtained in step A is first filtered through a first KKF filter, and then enters a second KKF filter, and the viscose is obtained after the filtration through the second KKF filter, thereby completing the recovery of the waste glue; the pore size of the metal sintered felt of the first KKF filter is 30-50 um, and the pore size of the metal sintered felt of the second KKF filter is 15-25 um.

[0005] The above patent improves the waste glue recovery rate, solves the problems of serious waste, high labor cost and low filtration efficiency in the waste glue process, but the waste glue recovery rate of the above patent still has the problem of low efficiency. Moreover, the waste glue generated by the second KKF filtration is re-entered into the first KKF filter, the filtration pressure of the first KKF filter is too large, which greatly affects the viscose ripening degree of the entire production system, and is not conducive to the subsequent spinning. SUMMARY

[0006] In order to solve the problems existing in the prior art, the application provides a waste rubber recovery system for short fiber production, which recovers waste rubber generated by different KKF to different processes of the production line to reduce the inconsistency of aging degree.

[0007] In order to achieve the above technical effects, the technical scheme of the application is as follows:

[0008] A waste rubber recovery system for short fiber production, comprising a filtering device, a waste rubber treatment device and a waste residue treatment device; the filtering device is connected with the waste rubber treatment device, and the waste rubber treatment device is connected with the waste residue treatment device; the filtering device comprises a first filtering equipment, a first waste rubber filtering machine, a second filtering equipment and a second waste rubber filtering machine; the first filtering equipment is connected with the first waste rubber filtering machine to filter the waste rubber generated by the first filtering equipment, and the first filtering equipment is connected with the second filtering equipment; the second filtering equipment is connected with the second waste rubber filtering machine to filter the waste rubber generated by the second filtering equipment and deliver the filtered rubber back to the second filtering equipment; the second waste rubber filtering machine and the first waste rubber filtering machine are both connected with the waste rubber treatment device.

[0009] Further, the first filtering equipment comprises a first filtering machine; the first waste rubber filtering machine is connected with a first rubber supply barrel for storing good rubber, and the first rubber supply barrel is connected with the first filtering machine; the second filtering equipment comprises a second filtering machine and a third filtering machine, and the second filtering machine is connected with the third filtering machine; the second filtering machine and the third filtering machine are both connected with the second waste rubber filtering machine.

[0010] Still further, a defoaming barrel for removing bubbles in rubber is connected between the second filtering machine and the third filtering machine, and the defoaming barrel is connected with the second waste rubber filtering machine.

[0011] Still further, the second waste rubber filtering machine and the waste rubber dilution storage structure are both connected with the lye storage structure.

[0012] Further, the waste rubber treatment device comprises a waste rubber dilution storage structure and a dilute rubber water treatment device, and the dilute rubber water treatment device is connected with the waste rubber treatment device to treat the dilute rubber water diluted by the waste rubber dilution storage structure.

[0013] Still further, the dilute rubber water treatment device comprises a first sand remover, a metal plate frame filter, a second sand remover, a first butterfly separator and a polypropylene plate frame filter; the first sand remover is connected with the metal plate frame filter, and the metal plate frame filter is connected with the second sand remover; the cyclone sand remover is connected with the first butterfly separator, and the first butterfly separator is connected with the polypropylene plate frame filter.

[0014] Further, the first sand remover, the metal plate frame filter, the second sand remover, the first butterfly separator and the polypropylene plate frame filter are connected with a sedimentation tank structure for depositing waste residues.

[0015] Further, the first sand remover is a three-stage sand remover, and the second sand remover is a cyclone sand remover.

[0016] Further, the sedimentation tank structure is connected with a second butterfly separator, separates supernatant in the sedimentation tank structure, and returns waste residues to the sedimentation tank structure; the second butterfly separator is connected with a polypropylene plate frame filter, and transports dilute glue water separated from the supernatant in the sedimentation tank structure to the polypropylene plate frame filter.

[0017] Further, the sedimentation tank structure is connected with an acid-base neutralization storage structure, transports sediment residues in the sedimentation tank structure to the acid-base neutralization storage structure, and the acid-base neutralization storage structure is connected with an acidic wastewater storage structure; the acid-base neutralization storage structure is connected with a filter press.

[0018] According to the above technical scheme, the utility model has the beneficial effects as follows:

[0019] 1. In the utility model, the waste glue produced by the second filter and the third filter is filtered through the second waste glue filter, and the good glue is returned to the defoaming barrel. Compared with the prior art, the waste glue produced by the second filter and the third filter is directly filtered by one filter, the pressure of the one filter is reduced, the influence on the viscosity of the whole production system is reduced, and the subsequent spinning process is better.

[0020] 2. In the utility model, the first waste glue filter is connected with the one filter, and the first waste glue filter is connected with the one glue supply barrel, so that the waste glue produced by the one filter is filtered through the first waste glue filter, and the good glue is returned to the one glue supply barrel, the waste glue produced by the subsequent second filter and third filter is reduced, and the pressure on the one filter is reduced.

[0021] 3. In the utility model, the waste glue treatment device and the waste residue treatment device are adopted, the waste glue treatment device is used for treating waste glue, and relatively pure dilute glue water is obtained, which is used for improving the subsequent yellowing process, and the waste residue treatment device is used for treating the waste residue produced by the waste glue treatment device, so that the waste residue is reduced, and the negative influence on the environment is reduced.

[0022] 4. In the utility model, the first butterfly separator and the second butterfly separator are used for separating dilute glue water and waste residues produced by the dilute glue water, compared with the separation mode in the prior art, the production amount of waste residues is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 This is a schematic diagram of the device and structural connection of this utility model.

[0024] Figure 2 This is a flowchart illustrating the workflow of this system.

[0025] In the attached diagram: 1-First stage filter; 2-First waste glue filter; 3-First glue supply tank; 4-Second stage filter; 5-Third stage filter; 6-Degassing tank; 7-Second waste glue filter; 8-Alkali storage structure; 9-Waste glue dilution storage structure; 10-First sand separator; 11-Metal plate and frame filter; 12-Second sand separator; 13-First disc separator; 14-Polypropylene plate and frame filter; 15-Sedimentation tank structure; 16-Second disc separator; 17-Acid-base neutralization storage structure; 18-Acidic wastewater storage structure; 19-Filter press. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0027] Example 1

[0028] like Figure 1 As shown, a waste glue recycling system for staple fiber production includes a filtration device, a waste glue treatment device, and a waste residue treatment device. The filtration device is connected to the waste glue treatment device, and the waste glue treatment device is connected to the waste residue treatment device. The filtration device includes a first filtration unit, a first waste glue filter 2, a second filtration unit, and a second waste glue filter 7. The first filtration unit is connected to the first waste glue filter 2 to filter the waste glue generated by the first filtration unit, and is also connected to the second filtration unit. The second filtration unit is connected to the second waste glue filter 7 to filter the waste glue generated by the second filtration unit, and the filtered glue is returned to the second filtration unit for further filtration to obtain the final product. The glue is used for subsequent spinning; the first filtration equipment, the second filtration equipment, the first waste glue filter 2 and the second waste glue filter 7 are all KKF filters; the second waste glue filter 7 and the first waste glue filter 2 are both connected to the waste glue treatment device. The waste glue generated by the second waste glue filter 7 and the first waste glue filter 2 is treated by the waste glue treatment device to obtain diluted glue, which is used for the yellowing process in the subsequent process. While the waste glue treatment device is treating the waste glue, it will generate waste residue. The waste residue treatment device treats the waste residue, thereby reducing the negative impact on the environment; the second waste glue filter 7 and the first waste glue filter 2 are both connected to the waste glue treatment device through carbon steel pipes.

[0029] Example 2

[0030] As Figure 1 shown, a waste rubber recovery system for short fiber production, comprising a filtering device, a waste rubber treatment device and a waste residue treatment device; the filtering device is connected with the waste rubber treatment device, and the waste rubber treatment device is connected with the waste residue treatment device; the filtering device comprises a first filtering device, a first waste rubber filter 2, a second filtering device and a second waste rubber filter 7; the first filtering device is connected with the first waste rubber filter 2 to filter the waste rubber generated by the first filtering device, and the first filtering device is connected with the second filtering device; the second filtering device is connected with the second waste rubber filter 7 to filter the waste rubber generated by the second filtering device, and the filtered rubber is transported back to the second filtering device, and the rubber obtained after being filtered again by the second filtering device is used for subsequent spinning; the first filtering device, the second filtering device, the first waste rubber filter 2 and the second waste rubber filter 7 are all selected from KKF filters; the second waste rubber filter 7 and the first waste rubber filter 2 are both connected with the waste rubber treatment device, the waste rubber generated by the second waste rubber filter 7 and the first waste rubber filter 2 is treated by the waste rubber treatment device to obtain thin rubber water, which is used for subsequent yellowing process, and the waste rubber treatment device generates waste residue while treating the waste rubber, which is treated by the waste residue treatment device, thereby reducing the negative impact on the environment; wherein the second waste rubber filter 7 and the first waste rubber filter 2 are connected with the waste rubber treatment device through carbon steel pipelines.

[0031] The first filtering device comprises a first filter 1; the first waste rubber filter 2 is connected with a first rubber storage barrel 3, and the first rubber storage barrel 3 is connected with the first filter 1; the first waste rubber filter 2 stores the filtered waste rubber in the first rubber storage barrel 3, and the first rubber storage barrel 3 supplies the good rubber to the first filter 1 for re-filtering; the second filtering device comprises a second filter 4 and a third filter 5, and the second filter 4 is connected with the third filter 5; the second filter 4 and the third filter 5 are both connected with the second waste rubber filter 7; the first waste rubber filter 2 adopts a 40μ metal fiber felt, and the second waste rubber filter 7 adopts an 18μ metal fiber felt.

[0032] A defoaming barrel 6 for removing bubbles in the glue is connected between the second filter 4 and the third filter 5, and the defoaming barrel 6 is connected with the second waste glue filter 7; the second waste glue filter 7 and the waste glue dilution storage structure 9 are connected with the lye storage structure 8; the good glue obtained after the second waste glue filter 7 is filtered is input to the defoaming barrel 6, defoamed by the defoaming barrel 6, and filtered by the third filter 5, and then used for subsequent spinning; the waste glue obtained after the second waste glue filter 7 is filtered is input to the waste glue dilution storage structure 9, and the lye in the lye storage structure 8 is also input to the waste glue dilution storage structure 9 at the same time, the lye is selected as 18 g / L lye, and the waste glue and the lye are mixed at a ratio of 1:8 to finally obtain dilute glue water, which is continuously treated by a dilute glue water treatment device; the lye storage structure 8 is a lye head tank, and the lye is delivered to the waste glue dilution storage structure 9 by a centrifugal pump.

[0033] The waste glue treatment device includes the waste glue dilution storage structure 9 and the dilute glue water treatment device, and the dilute glue water treatment device is connected with the waste glue treatment device, and the dilute glue water diluted by the waste glue dilution storage structure 9 is treated.

[0034] The dilute glue water treatment device includes a first sand remover 10, a metal plate frame filter 11, a second sand remover 12, a first butterfly separator 13 and a polypropylene plate frame filter 14; the first sand remover 10 is connected with the metal plate frame filter 11, and the metal plate frame filter 11 is connected with the second sand remover 12; the cyclone sand remover is connected with the first butterfly separator 13, and the first butterfly separator 13 is connected with the polypropylene plate frame filter 14; the first sand remover 10, the metal plate frame filter 11, the second sand remover 12, the first butterfly separator 13 and the polypropylene plate frame filter 14 are connected with a sedimentation tank structure 15 for sedimentation of waste residues, the sedimentation tank structure 15 is a square tank, and an overflow baffle is arranged in the tank to prevent liquid from flowing out; the first sand remover 10 is a three-stage sand remover; the second sand remover 12 is a cyclone sand remover; the three-stage sand remover is used to remove large particle impurities in the dilute glue water, and the removal precision is greater than 100 μ; the metal plate frame filter 11 is used to remove large particle impurities in the dilute glue water, and the removal precision is 65 μ~100 μ; the cyclone sand remover is used to remove medium particle impurities in the dilute glue water, and the removal precision is 40 μ~65 μ; the first butterfly separator 13 is used to remove small particle impurities in the dilute glue water, and the removal precision is 25 μ~40 μ; and the polypropylene plate frame filter 14 is used to remove small particle impurities such as pectin, resin and fine cellulose in the dilute glue water.

[0035] The sedimentation tank structure 15 is connected with a second butterfly separator 16, which separates the supernatant in the sedimentation tank structure 15 and returns the waste residues to the sedimentation tank structure 15; the second butterfly separator 16 is connected with the polypropylene plate frame filter 14, and the dilute glue water separated from the supernatant in the sedimentation tank structure 15 is delivered to the polypropylene plate frame filter 14.

[0036] The sedimentation tank structure 15 is connected to the acid-base neutralization storage structure 17, which transports the sludge from the sedimentation tank structure 15 to the acid-base neutralization storage structure 17. The acid-base neutralization storage structure 17 is connected to the acidic wastewater storage structure 18. The acid-base neutralization storage structure 17 is a circular tank equipped with an agitator to ensure thorough acid-base neutralization. It is connected to the acidic wastewater storage structure 18 via an FRPP pipe. The acid-base neutralization storage structure 17 is also connected to a filter press 19, a filtration device that uses a slurry pump as power to filter based on pressure difference. The filter press 19 removes suspended solids, producing acidic wastewater and solid filter residue. The acidic wastewater is sent to a wastewater treatment plant for further processing, while the solid waste residue, being organic matter, can be used as heat energy for steam generation in a steam boiler and burned along with coal.

[0037] Example 3

[0038] Based on Embodiment 2, the working principle of this utility model is as follows: Figure 2 As shown, the adhesive is placed into a first filter 1. The good adhesive obtained from the first filter 1 is sent to a second filter 4. The waste adhesive remaining after the first filter 1 is filtered is then sent to a first waste adhesive filter 2. The first waste adhesive filter 2 filters the waste adhesive, and the good adhesive filtered from the waste adhesive is stored in a first adhesive supply tank 3. The remaining waste adhesive after filtration is diluted. The second filter 4 filters the good adhesive obtained from the first filter 1 again. The good adhesive obtained after filtration is sent to a degassing tank 6 to degas the good adhesive. The degassed good adhesive is then sent to a third filter 5. The good adhesive obtained from the third filter 5 is used for subsequent spinning. The waste adhesive generated during the filtration of the second filter 4 and the third filter 5 is filtered again by a second waste adhesive filter 7. The good adhesive obtained after filtration is sent back to the degassing tank 6, and the waste adhesive obtained is diluted. The waste adhesive is diluted to obtain a thinner product. The glue, or diluted glue, is filtered sequentially through a first sand separator 10, a metal plate and frame filter 11, a second sand separator 12, a first disc separator 13, and a polypropylene plate and frame filter 14. The resulting diluted glue is used in the xanthation process. During the filtration process, the waste residue generated by the first sand separator 10, the metal plate and frame filter 11, the second sand separator 12, the first disc separator 13, and the polypropylene plate and frame filter 14 is settled in a sedimentation tank. The supernatant after sedimentation is separated by a second disc separator 16. The resulting diluted glue is directly filtered through the polypropylene plate and frame filter and used in the xanthation process. The remaining glue is settled in a sedimentation tank, and the resulting sediment sludge is neutralized with acidic wastewater. Finally, it is filtered through a filter press 19. The resulting product is then processed, the wastewater is sent to a wastewater treatment plant for water treatment, and the solid waste residue is incinerated.

[0039] Among them, the first filtration device, the second filtration device, the first waste glue filter 2, and the second waste glue filter 7 are all KKF filters; such as Figure 2 As shown, the first KKF is the first filter 1 for filtration; the second KKF is the second filter 4 for filtration; the third KKF is the third filter 5 for filtration; the first waste glue KKF is the first waste glue filter 2 for filtration; the second and third KKF are the second waste glue filter 7 for filtration; and the two sand removers are the first sand remover 10.

[0040] The above description is a detailed description of the preferred embodiments of this application. However, the embodiments are not intended to limit the scope of the patent application of this application. All equivalent changes or modifications made under the technical spirit of this application should fall within the patent scope covered by this application.

Claims

1. A waste rubber reclaiming system for staple fibre production, characterised in that: The application relates to a rubber processing device, which comprises a filtering device, a waste rubber processing device and a waste residue processing device; the filtering device is connected with the waste rubber processing device, the waste rubber processing device is connected with the waste residue processing device; the filtering device comprises a first filtering device, a first waste rubber filtering machine (2), a second filtering device and a second waste rubber filtering machine (7); the first filtering device is connected with the first waste rubber filtering machine (2) to filter waste rubber generated by the first filtering device, and the first filtering device is connected with the second filtering device; the second filtering device is connected with the second waste rubber filtering machine (7) to filter waste rubber generated by the second filtering device, and the filtered rubber is fed back to the second filtering device; the second waste rubber filtering machine (7) and the first waste rubber filtering machine (2) are connected with the waste rubber processing device.

2. A waste rubber recovery system for staple fiber production according to claim 1, characterized in that: The first filtering device comprises a filtering machine (1); the first waste rubber filtering machine (2) is connected with a rubber supplying barrel (3) for storing good rubber, and the rubber supplying barrel (3) is connected with the filtering machine (1); the second filtering device comprises a second filtering machine (4) and a third filtering machine (5), and the second filtering machine (4) is connected with the third filtering machine (5); the second filtering machine (4) and the third filtering machine (5) are connected with the second waste rubber filtering machine (7).

3. A waste rubber recovery system for staple fibre production according to claim 2, wherein: A defoaming barrel (6) for removing bubbles in rubber is arranged between the second filtering machine (4) and the third filtering machine (5), and the defoaming barrel (6) is connected with the second waste rubber filtering machine (7).

4. A waste rubber recovery system for staple fiber production according to claim 1, characterized in that: The second waste rubber filtering machine (7) and a waste rubber dilution storage structure (9) are connected with a lye storage structure (8).

5. A waste rubber reclaiming system for staple fiber production according to claim 1, characterized in that: The waste rubber processing device comprises the waste rubber dilution storage structure (9) and a dilute rubber water processing device, and the dilute rubber water processing device is connected with the waste rubber processing device to process dilute rubber water of the waste rubber dilution storage structure (9).

6. A waste rubber reclaiming system for staple fibre production according to claim 5, wherein: The dilute rubber water processing device comprises a first sand remover (10), a metal plate frame filter (11), a second sand remover (12), a first butterfly separator (13) and a polypropylene plate frame filter (14); the first sand remover (10) is connected with the metal plate frame filter (11), the metal plate frame filter (11) is connected with the second sand remover (12); the second sand remover (12) is connected with the first butterfly separator (13), and the first butterfly separator (13) is connected with the polypropylene plate frame filter (14).

7. A waste rubber reclaiming system for staple fibre production according to claim 6, characterized in that: The first sand remover (10), the metal plate frame filter (11), the second sand remover (12), the first butterfly separator (13) and the polypropylene plate frame filter (14) are connected with a sedimentation tank structure (15) for precipitating waste residue.

8. A waste rubber recovery system for staple fibre production according to claim 7, characterised in that: The first sand remover (10) is a three-stage sand remover; the second sand remover (12) is a cyclone sand remover.

9. A waste rubber reclaiming system for staple fiber production according to claim 7, characterized in that: The sedimentation tank structure (15) is connected with a second butterfly separator (16) to separate supernatant in the sedimentation tank structure (15) and return waste residue to the sedimentation tank structure (15); the second butterfly separator (16) is connected with the polypropylene plate frame filter (14) to feed dilute rubber water separated from the supernatant in the sedimentation tank structure (15) to the polypropylene plate frame filter (14).

10. A waste rubber reclaiming system for staple fiber production according to claim 7, characterized in that: The sedimentation tank structure (15) is connected with the acid-base neutralization storage structure (17), and the sedimentation residue in the sedimentation tank structure (15) is transported to the acid-base neutralization storage structure (17), and the acid-base neutralization storage structure (17) is connected with the acidic wastewater storage structure (18); the acid-base neutralization storage structure (17) is connected with the filter press (19).

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