A comprehensive treatment system for zinc-containing waste generated in viscose fiber production.

Abstract

This utility model discloses a comprehensive treatment system for zinc-containing waste generated in viscose fiber production, belonging to the field of waste treatment in viscose fiber production. The system includes a reaction tank, filter press, pretreatment device, filter, ion exchange resin column, and acid bath preparation tank, ensuring a comprehensive treatment pathway for zinc-containing waste. This facilitates the mixing of highly acidic, high-salt zinc-containing wastewater with zinc-containing sludge. The strong acidity of the wastewater allows for the acid leaching of zinc sulfide and zinc hydroxide in the sludge, simultaneously obtaining a zinc sulfate solution and recovering sulfate to prepare sodium sulfate and sulfuric acid. This reduces the salinity of the wastewater, thereby decreasing the amount of reagents used in treating zinc-containing wastewater, mitigating scaling risks, and reducing the load on subsequent biochemical systems.

Description

Technical Field

[0001] This utility model relates to a zinc-containing waste treatment system, and more particularly to a comprehensive treatment system for zinc-containing waste generated in viscose fiber production, belonging to the field of waste treatment in viscose fiber production. Background Technology

[0002] The production process of viscose fiber generates a large amount of zinc-containing waste, specifically including zinc-containing sludge and highly acidic, high-salt zinc-containing wastewater. The zinc-containing sludge is formed in viscose wastewater treatment plants and other similar facilities, and mainly contains zinc sulfide and zinc hydroxide. The highly acidic zinc-containing wastewater is formed in the washing and acid baths of the spinning workshop and other similar facilities, and mainly contains sulfuric acid, zinc sulfate, and sodium sulfate, with a pH of 1-2 and a zinc ion content of approximately 150-300 mg / L.

[0003] Currently, the zinc-containing wastewater and sludge generated during viscose fiber production not only waste resources but also cause serious environmental pollution if discharged directly. The high sulfate content in the highly acidic zinc-containing wastewater exacerbates scaling during wastewater treatment, increases the difficulty of cultivating and acclimatizing microorganisms in the biological system, and raises wastewater treatment costs (due to large amounts of chemicals). Therefore, desalination of zinc-containing wastewater is imperative.

[0004] Although the prior art CN209322627U discloses an environmentally friendly treatment device for viscose wastewater based on a resin tower, it mainly uses a bipolar membrane stack to recover and utilize sulfuric acid, sodium hydroxide, and dilute sodium sulfate solutions; CN117985753A discloses "a method for preparing zinc sulfate from zinc-containing sludge," but it mainly prepares feed-grade zinc sulfate monohydrate for use in nutrients, feed additives, etc.; CN107902855A discloses "a process for recovering waste zinc ions in viscose fiber production," in which lime powder is added to viscose fiber wastewater in sequence to react and form sludge, The process involves a specific sequence of steps: adding sulfuric acid to dissolve metal ions in sludge, filtration, adjusting the pH of the filtrate to alkaline, filtration again, adding sulfuric acid to the filtrate to adjust the pH to acidic, adsorption with a macroporous chelating divinylbenzene polymer ion exchange resin, elution with sulfuric acid solution, and collection of the eluent. This process effectively recovers waste zinc ions. Furthermore, CN101343124A discloses a "method and equipment for treating wastewater and waste gas from viscose fiber production," in which the collected neutralized liquid is added to the zinc-containing wastewater to react with the zinc ions. The reaction product precipitates, and the precipitate is removed, thus focusing on the treatment of zinc-containing wastewater.

[0005] Therefore, there is a need for a treatment system that is effective and cost-efficient for handling zinc-containing waste generated during viscose fiber production. Summary of the Invention

[0006] To alleviate the difficulty of treating highly acidic, high-salt zinc-containing wastewater and zinc-containing sludge, a comprehensive treatment system for zinc-containing waste generated in viscose fiber production is proposed. This system involves mixing the highly acidic, high-salt zinc-containing wastewater with the zinc-containing sludge. The strong acidity of the wastewater is used to leach zinc sulfide and zinc hydroxide in the sludge, simultaneously obtaining a zinc sulfate solution and recovering sulfate to prepare sodium sulfate. This reduces the salinity of the wastewater, thereby decreasing the amount of reagents required for zinc-containing wastewater treatment, mitigating the risk of scaling, and reducing the load on subsequent biological treatment systems.

[0007] To achieve the above technical objectives, the following technical solution is proposed:

[0008] The purpose of this technical solution is to provide: a comprehensive treatment system for zinc-containing waste generated in viscose fiber production, including a reaction tank, a filter press, a pretreatment device, a filter, an ion exchange resin column, and an acid bath preparation tank;

[0009] Reaction tank: It is connected to zinc-containing sludge pipe and zinc-containing wastewater pipe. A filter press is installed at the rear of the work station of the reaction tank. The sludge outlet of the reaction tank is connected to the feed inlet of the filter press, and the wastewater outlet of the reaction tank is connected to the feed inlet of the pretreatment device.

[0010] Filter press: A pretreatment device is installed at the rear of the workstation, and the leachate outlet of the filter press is connected to the feed inlet of the pretreatment device. A plate and frame filter press is preferred.

[0011] Pretreatment device: It is connected to activated carbon feed pipe, sodium hydroxide feed pipe and flocculant feed pipe. A filter is installed at the rear of the pretreatment device station. The waste liquid outlet of the pretreatment device is connected to the feed inlet of the filter. The sludge outlet of the pretreatment device is connected to the feed inlet of the filter press.

[0012] Filter: An ion exchange resin column is installed at the rear of the workstation, and the filtrate outlet of the filter is connected to the feed inlet of the ion exchange resin column;

[0013] Ion exchange resin column: An acid bath preparation tank and / or a sodium sulfate preparation system are provided at the rear of the workstation. The outlet of the exchange liquid on the ion exchange resin column is connected to the acid bath preparation tank and / or the sodium sulfate preparation system. The outlet of the alkaline washing regeneration waste liquid on the ion exchange resin column is connected to the acid bath preparation tank and / or the sodium sulfate preparation system. A single-effect evaporator is connected to the outlet of the acid washing regeneration waste liquid on the ion exchange resin column. The zinc sulfate concentrate outlet at the bottom of the single-effect evaporator is connected to the acid bath preparation tank.

[0014] Acid bath preparation tank: installed in the viscose fiber production system, the acid bath preparation tank is connected to the coagulation bath tank in the viscose fiber production system;

[0015] A comprehensive treatment pathway for zinc-containing waste is formed between the reaction tank, filter press, pretreatment device, filter, ion exchange resin column, sodium sulfate preparation system, acid bath preparation tank and single-effect evaporator.

[0016] Furthermore, both the zinc-containing sludge pipe and the zinc-containing wastewater pipe are connected to the viscose fiber production system.

[0017] Furthermore, the reaction tank is equipped with a pH meter and an MLSS sludge concentration meter.

[0018] Furthermore, the zinc-containing wastewater pipe is equipped with a gas-liquid mixing pump, and the reaction tank is equipped with a reflux port, which is connected to the gas-liquid mixing pump through a reflux circulation pipe.

[0019] Furthermore, a centrifugal pump for conveying filtrate is provided between the filter and the ion exchange resin column to ensure that the filtrate discharged from the filter is smoothly and stably introduced into the ion exchange resin column.

[0020] Furthermore, the Glauber's salt preparation system includes a multi-effect evaporator, a vacuum crystallization device, and a centrifuge device. The multi-effect evaporator is connected to the outlet of the ion exchange resin column, and is also connected to the outlet of the alkaline washing regeneration waste liquid on the ion exchange resin column. The multi-effect evaporator is connected to the vacuum crystallization device, which is connected to the centrifuge device. The centrifuge mother liquor outlet is connected to the acid bath preparation tank, and the sediment outlet of the centrifuge device is connected to a Glauber's salt storage tank.

[0021] In this technical solution, the positional relationships such as "rear side of the workstation", "upper", "middle", "between", and "bottom" are defined according to the actual usage conditions and are common terms in this technical field, as well as common terms used by those skilled in the art in actual use.

[0022] The beneficial technical effects of adopting this technical solution are as follows:

[0023] The production of viscose fiber generates a large amount of zinc-containing wastewater and zinc-containing sludge. Direct discharge of these wastewaters not only wastes resources but also causes serious environmental pollution. Therefore, this invention addresses this issue by incorporating a reaction tank, filter press, pretreatment device, filter, ion exchange resin column, acid bath preparation tank, and single-effect evaporator. This ensures a comprehensive treatment pathway for zinc-containing waste, purifying and reusing zinc sulfate and sodium sulfate while reducing the salinity of the wastewater. It also solves the problem of secondary pollution from zinc-containing sludge, achieving waste reuse and resource recycling.

[0024] Based on this integrated treatment system, the characteristics of zinc-containing wastewater and zinc-containing sludge generated during viscose fiber production are utilized. The two are mixed and zinc ions are leached out from the sludge in a strongly acidic environment to increase the zinc sulfate content in the zinc-containing wastewater. Then, through pretreatment (decolorization, flocculation sedimentation, filtration), ion exchange and other processes, the resource utilization and pollution reduction of zinc-containing waste are realized, reducing waste treatment pressure and operating costs. Attached Figure Description

[0025] Figure 1 This is a structural block diagram related to this utility model;

[0026] Figure 2 This is a schematic diagram illustrating the working principle of this utility model;

[0027] In the diagram, 1. Reaction tank, 2. Filter press, 3. Pretreatment device, 4. Filter, 5. Ion exchange resin column, 6. Glauber's salt preparation system, 61. Vacuum crystallization device, 62. Centrifuge device, 63. Glauber's salt storage tank, 64. Multi-effect evaporator, 7. Acid bath preparation tank, 8. Single-effect evaporator, 9. Zinc-containing sludge pipe, 10. Zinc-containing wastewater pipe, 11. Activated carbon feed pipe, 12. Sodium hydroxide feed pipe, 13. Flocculant feed pipe, 14. pH meter, 15. Gas-liquid mixing pump, 16. Return circulation pipe, 17. Coagulation bath, 18. Centrifugal pump, 19. MLSS sludge concentration meter. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0029] During the production of viscose fiber, the sludge produced contains a large amount of zinc ions. After being mixed and reacted with zinc-containing wastewater, the zinc ions in the sludge are extracted in a strongly acidic environment to increase the zinc sulfate content in the zinc-containing wastewater. Then, through pretreatment (activated carbon decolorization, flocculation sedimentation, filtration), ion exchange and other processes, the zinc sulfate and sodium sulfate are purified and reused, while reducing the salt content of the wastewater. In addition, it can also solve the problem of secondary pollution from zinc-containing sludge, and achieve the effect of waste reuse and resource recycling.

[0030] In the process of treating zinc-containing waste, this invention utilizes the characteristics of zinc-containing wastewater (strongly acidic) and zinc-containing sludge generated during viscose fiber production to leach and extract zinc ions using the strong acidity of the zinc-containing wastewater. This can alleviate the scaling effect of sulfate on the wastewater system, reduce the dosage of agents such as lime and flocculants, thereby reducing the operating load of the subsequent biochemical system and the difficulty of sludge disposal.

[0031] The following examples illustrate this.

[0032] Example 1

[0033] This embodiment provides: a comprehensive treatment system for zinc-containing waste generated during viscose fiber production, such as... Figure 1 As shown, it includes a reaction tank 1, a filter press 2, a pretreatment device 3, a filter 4, an ion exchange resin column 5, and an acid bath preparation tank 7.

[0034] Reaction tank 1 is connected to a zinc-containing sludge pipe 9 and a zinc-containing wastewater pipe 10. A filter press 2 is located at the rear of the workstation of reaction tank 1. The sludge outlet of reaction tank 1 (generally located at the bottom of reaction tank 1) is connected to the feed inlet of filter press 2, and the wastewater outlet of reaction tank 1 (generally located at the top of reaction tank 1) is connected to the feed inlet of pretreatment device 3. Both the zinc-containing sludge pipe 9 and the zinc-containing wastewater pipe 10 are connected to the viscose fiber production system. More specifically, the zinc-containing sludge pipe 9 is connected to the viscose wastewater treatment station in the viscose fiber production system, and the zinc-containing wastewater pipe 10 is connected to the washing station and / or acid station in the spinning workshop of the viscose fiber production system. This not only achieves energy conservation and emission reduction, improves environmental protection, and is environmentally friendly, but also recycles the sodium sulfate and zinc sulfate formed, reducing production costs.

[0035] Filter press 2: A pretreatment device 3 is provided at the rear of the workstation, and the leachate outlet of filter press 2 is connected to the feed inlet of pretreatment device 3. Preferably, plate and frame filter press 2 is used.

[0036] Pretreatment device 3: Connected to activated carbon feed pipe 11, sodium hydroxide feed pipe 12, and flocculant feed pipe 13 (e.g., PAM). A filter 4 is installed at the rear of the pretreatment device 3. The waste liquid outlet of the pretreatment device 3 is connected to the feed inlet of the filter 4, and the sludge outlet of the pretreatment device 3 is connected to the feed inlet of the filter press 2. The pretreatment device 3 performs activated carbon adsorption decolorization, pH adjustment, and flocculation sedimentation on the leachate from the filter press 2 and the acid leaching solution from the reaction tank 1.

[0037] Filter 4: An ion exchange resin column 5 is installed at the rear of the workstation. The filtrate outlet of filter 4 is connected to the feed inlet of ion exchange resin column 5. This filter purifies the waste liquid after activated carbon adsorption decolorization, pH adjustment, and flocculation sedimentation treatment.

[0038] Ion exchange resin column 5: An acid bath preparation tank 7 is provided at the rear of the workstation. The exchange liquid outlet (mainly containing sodium sulfate, which is a viscose fiber spinning aid) on the ion exchange resin column 5 is connected to the acid bath preparation tank 7. The alkaline washing regeneration waste liquid outlet (mainly containing sodium sulfate, which is a viscose fiber spinning aid) on the ion exchange resin column 5 is connected to the acid bath preparation tank 7. The acid washing regeneration waste liquid outlet (mainly zinc sulfate solution) on the ion exchange resin column 5 is connected to the single-effect evaporator 8 (preferably a rising film evaporator). The zinc sulfate concentrate outlet at the bottom of the single-effect evaporator 8 is connected to the acid bath preparation tank 7.

[0039] Acid bath preparation tank 7: installed in the viscose fiber production system, the acid bath preparation tank 7 is connected to the coagulation bath tank 17 in the viscose fiber production system;

[0040] The reaction tank 1, filter press 2, pretreatment device 3, filter 4, ion exchange resin column 5, acid bath preparation tank 7, and single-effect evaporator 8 form a comprehensive treatment pathway for zinc-containing waste. This achieves the purification and reuse of zinc sulfate and sodium sulfate, while also reducing the salinity of wastewater and solving the problem of secondary pollution from zinc-containing sludge, thus realizing the effects of waste reuse and resource recycling.

[0041] Example 2

[0042] Based on Example 1, this example further defines the reaction tank 1 and the zinc-containing wastewater pipe 10 to further illustrate the technical solution.

[0043] A pH meter 14 is installed on reaction tank 1 to monitor the pH within the tank, thereby facilitating the control of dissolution within the tank and controlling the zinc sulfate content. For example, by monitoring the pH of reaction tank 1, the pH can be controlled between 1.0 and 2.0 during the reaction process to ensure that zinc hydroxide (an amphoteric hydroxide that dissolves to form zinc sulfate under strong acid conditions) and zinc sulfide in the sludge are fully acidified and dissolved, increasing the zinc sulfate content in the wastewater. The underlying principles are: Zn(OH)₂ + H₂SO₄ → ZnSO₄ + 2H₂O, ZnS + H₂SO₄ → ZnSO₄ + H₂S↑.

[0044] The reaction tank 1 is also equipped with an MLSS sludge concentration meter 19, which is used to monitor the MLSS sludge concentration in the reaction tank 1 and facilitate the control of the solid-liquid ratio in the reaction tank 1.

[0045] A gas-liquid mixing pump 15 is installed on the zinc-containing wastewater pipe 10, and a return port is installed on the reaction tank 1. The return port is connected to the gas-liquid mixing pump 15 through a return circulation pipe 16. The gas-liquid mixing pump 15 is used to pump zinc-containing wastewater and fresh air into the reaction tank 1, which increases the reaction intensity and reaction opportunity between zinc-containing sludge, wastewater, and air, so that zinc-containing wastewater and zinc-containing sludge are fully mixed, thereby achieving the effects of aeration and stirring, and improving the reaction efficiency and quality of the reaction tank 1. In addition, the strongly acidic zinc-containing wastewater and fresh air are continuously mixed through circulation, aeration, and mixing, until the zinc content in the sludge dissolves to trace amounts.

[0046] Example 3

[0047] Based on Examples 1-2, in order to ensure that the filtrate discharged from filter 4 flows smoothly and stably into the ion exchange resin column 5, the following further limitations are made:

[0048] A centrifugal pump 18 for conveying filtrate is provided between the filter 4 and the ion exchange resin column 5.

[0049] Example 4

[0050] Based on Examples 1-3, in the comprehensive treatment of zinc-containing waste generated in viscose fiber production, sodium sulfate solution can also be used to prepare sodium sulfate. Specifically, a sodium sulfate preparation system 6 is provided behind the station of ion exchange resin column 5. The outlet of the exchange liquid on ion exchange resin column 5 is connected to the sodium sulfate preparation system 6, and the outlet of the alkaline washing regeneration waste liquid on ion exchange resin column 5 is connected to the sodium sulfate preparation system 6.

[0051] The Glauber's salt preparation system 6 includes a multi-effect evaporator 64, a vacuum crystallization device 61, and a centrifuge device 62. The multi-effect evaporator 64 is connected to the exchange liquid outlet of the ion exchange resin column 5. The multi-effect evaporator 64 is also connected to the alkaline washing regeneration waste liquid outlet of the ion exchange resin column 5. The multi-effect evaporator 64 is connected to the vacuum crystallization device 61. The vacuum crystallization device 61 is connected to the centrifuge device 62. The centrifuge mother liquor outlet of the centrifuge device 62 is connected to the acid bath preparation tank 7. The sediment outlet of the centrifuge device 62 is connected to the Glauber's salt storage tank 63.

[0052] Example 5

[0053] Based on Examples 1-4, the comprehensive treatment system for zinc-containing waste generated in viscose fiber production, such as... Figure 2 As shown, the work process involved includes:

[0054] 1. For zinc-containing sludge and strongly acidic zinc-containing wastewater generated in viscose fiber production, samples were taken and analyzed to determine the zinc content. The zinc ion content in the wastewater was used to determine the degree of zinc ion dissolution and reaction time in the sludge.

[0055] 2. In reaction tank 1, zinc-containing sludge and zinc-containing wastewater are mixed and reacted. The wastewater is allowed to stand and the sludge and water are separated. The sludge at the bottom of reaction tank 1 is fed into filter press 2 through the sludge discharge pipe for dewatering treatment to form leachate. The leachate and the supernatant at the top of reaction tank 1 are treated by pretreatment device 3 (activated carbon adsorption decolorization, pH adjustment to 7, flocculation and sedimentation) and then filtered by filter 4. Then, the ion exchange process is carried out.

[0056] 3. The filtrate formed by filter 4 enters the ion exchange resin column 5. The exchange liquid (mainly containing sodium sulfate) coming out from the top of the ion exchange resin column 5 can be directly used for coagulation bath preparation; or, it can be subjected to multi-effect evaporation, vacuum crystallization, and centrifugation to prepare sodium sulfate and produce the by-product sodium sulfate.

[0057] During ion exchange, the exchange column gradually changes color after adsorbing zinc ions, and the exchange band of the ion exchange resin gradually moves from bottom to top. When the exchange band moves to two-thirds of the ion exchange resin, the resin at the bottom of the exchange column is very dark and has reached saturation, at which point the chelating resin can be regenerated. When regenerating the chelating resin (Na-type) after discoloration, it is first regenerated countercurrently with twice the volume of H2SO4 solution (4-5%) to obtain acid washing regeneration waste liquid (low-concentration zinc sulfate solution), which is then evaporated and concentrated to obtain a high-concentration zinc sulfate solution. This high-concentration zinc sulfate solution is reused in acid bath preparation tank 7 for preparation and then used as a coagulation bath.

[0058] After the ion exchange resin is acid-washed, it is rinsed thoroughly with soft water (or pure water) in both directions. Then, the resin is washed with a NaOH solution (4-5%) twice the volume of the regenerated resin to convert it to the sodium form. Finally, the ion exchange resin is thoroughly rinsed with soft water (or pure water), approximately twice the volume of the regenerated resin. The alkaline washing regeneration waste liquid (mainly containing sodium sulfate) can be mixed with the exchange liquid and used in a coagulation bath; alternatively, it can be subjected to multi-effect evaporation, vacuum crystallization, and centrifugation to prepare Glauber's salt, producing the byproduct sodium sulfate.

[0059] Ion exchange resin exchange principle: 2Na + +ZnSO4→Zn 2+ +NaSO4;

[0060] Ion exchange resin regeneration principle: Zn 2+ +H₂SO₄→ZnSO₄+2H₂ + H + +NaOH→H2O+Na + .

[0061] In this process, zinc hydroxide and zinc sulfide in zinc-containing sludge are dissolved and leached through strongly acidic zinc-containing wastewater. The mechanisms involved are: Zn(OH)2 + H2SO4 → ZnSO4 + 2H2O, ZnS + H2SO4 → ZnSO4 + H2S↑, continuously extracting zinc ions from the sludge and increasing the zinc sulfate content in the wastewater. Subsequent pretreatment, filtration, ion exchange, and evaporation concentration processes allow for the reuse of zinc sulfate and sodium sulfate, generating economic benefits. The reuse of sulfates reduces the amount of lime and flocculants used, while also mitigating scaling in wastewater treatment pipes and tanks, reducing the operational load on the wastewater treatment process. Furthermore, the zinc content in the sludge is significantly reduced after acid leaching, solving the problem of secondary pollution from zinc-containing sludge.

Claims

1. A comprehensive treatment system for zinc-containing waste generated in viscose fiber production, characterized in that: It includes a reaction tank (1), a filter press (2), a pretreatment device (3), a filter (4), an ion exchange resin column (5), and an acid bath preparation tank (7); the reaction tank (1) is connected to a zinc-containing sludge pipe (9) and a zinc-containing wastewater pipe (10), a filter press (2) is provided on the back side of the work station of the reaction tank (1), the sludge outlet of the reaction tank (1) is connected to the feed inlet of the filter press (2), and the wastewater outlet of the reaction tank (1) is connected to the feed inlet of the pretreatment device (3); A pretreatment device (3) is provided on the rear side of the filter press (2) station, and the leachate outlet on the filter press (2) is connected to the feed inlet on the pretreatment device (3); The pretreatment device (3) is connected to the activated carbon feeding pipe (11), the sodium hydroxide feeding pipe (12) and the flocculant feeding pipe (13). The pretreatment device (3) is equipped with a filter (4) at the rear of the work station. The waste liquid outlet of the pretreatment device (3) is connected to the feed inlet of the filter (4), and the sludge outlet of the pretreatment device (3) is connected to the feed inlet of the filter press (2). The filter (4) is equipped with an ion exchange resin column (5) at the rear of the station, and the filtrate outlet of the filter (4) is connected to the feed inlet of the ion exchange resin column (5). An acid bath preparation tank (7) is provided on the back side of the ion exchange resin column (5). The exchange liquid outlet of the ion exchange resin column (5) is connected to the acid bath preparation tank (7). The alkaline washing regeneration waste liquid outlet of the ion exchange resin column (5) is connected to the acid bath preparation tank (7). A single-effect evaporator (8) is connected to the acid washing regeneration waste liquid outlet of the ion exchange resin column (5). The zinc sulfate concentrate outlet at the bottom of the single-effect evaporator (8) is connected to the acid bath preparation tank (7). A comprehensive treatment pathway for zinc-containing waste is formed between the reaction tank (1), filter press (2), pretreatment device (3), filter (4), ion exchange resin column (5), acid bath preparation tank (7) and single-effect evaporator (8).

2. The comprehensive treatment system for zinc-containing waste generated in viscose fiber production according to claim 1, characterized in that: Both the zinc-containing sludge pipe (9) and the zinc-containing wastewater pipe (10) are connected to the viscose fiber production system.

3. The comprehensive treatment system for zinc-containing waste generated in viscose fiber production according to claim 1 or 2, characterized in that: The reaction tank (1) is equipped with a pH meter (14) and an MLSS sludge concentration meter (19).

4. The comprehensive treatment system for zinc-containing waste generated in viscose fiber production according to claim 3, characterized in that: The zinc-containing wastewater pipe (10) is equipped with a gas-liquid mixing pump (15), and the reaction tank (1) is equipped with a reflux port. The reflux port is connected to the gas-liquid mixing pump (15) through a reflux circulation pipe (16).

5. The comprehensive treatment system for zinc-containing waste generated in viscose fiber production according to claim 1, characterized in that: The filter press (2) is a plate and frame filter press (2).

6. The comprehensive treatment system for zinc-containing waste generated in viscose fiber production according to claim 1, characterized in that: A centrifugal pump (18) for conveying filtrate is provided between the filter (4) and the ion exchange resin column (5).

7. The comprehensive treatment system for zinc-containing waste generated in viscose fiber production according to claim 1, characterized in that: A sodium sulfate preparation system (6) is also provided on the rear side of the ion exchange resin column (5). The outlet of the exchange liquid on the ion exchange resin column (5) is connected to the sodium sulfate preparation system (6), and the outlet of the alkaline washing regeneration waste liquid on the ion exchange resin column (5) is connected to the sodium sulfate preparation system (6).

8. The integrated treatment system for zinc-containing waste generated in viscose fiber production according to claim 7, characterized in that: The Glauber's salt preparation system (6) includes a multi-effect evaporator (64), a vacuum crystallization device (61), and a centrifuge device (62). The multi-effect evaporator (64) is connected to the exchange liquid outlet of the ion exchange resin column (5). The multi-effect evaporator (64) is also connected to the alkaline washing regeneration waste liquid outlet of the ion exchange resin column (5). The multi-effect evaporator (64) is connected to the vacuum crystallization device (61). The vacuum crystallization device (61) is connected to the centrifuge device (62). The centrifuge mother liquor outlet of the centrifuge device (62) is connected to the acid bath preparation tank (7). The sediment outlet of the centrifuge device (62) is connected to a Glauber's salt storage tank (63).

9. The comprehensive treatment system for zinc-containing waste generated in viscose fiber production according to claim 1, characterized in that: The single-effect evaporator (8) is a rising film evaporator.

10. The integrated treatment system for zinc-containing waste generated in viscose fiber production according to any one of claims 1-9, characterized in that: The acid bath preparation tank (7) is installed in the viscose fiber production system and is connected to the coagulation bath tank (17) in the viscose fiber production system.

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