Recycling device for naphthoquinone production waste

Abstract

The utility model discloses a recycling device for naphthoquinone production waste, and relates to the technical field of naphthoquinone production, an outlet of a waste residue tank is communicated with an acid leaching tank, an outlet of the acid leaching tank is communicated with a centrifugal machine, a liquid phase outlet of the centrifugal machine is communicated with a concentration tank, an inlet of the concentration tank is communicated with a precipitant tank, and an outlet of the concentration tank is communicated with a first filter; a liquid phase outlet of the first filter is communicated with a reaction tank, an inlet of the reaction tank is respectively communicated with an oxidant tank and an alkali liquor tank, an outlet of the reaction tank is communicated with a nanofiltration membrane device, and the treatment of the nanofiltration membrane device is communicated with a treated water recovery tank. The acid leaching efficiency and the precipitation efficiency are improved. The filtering liquid phase of the first filter decomposes residual organic matters through oxidation, the pH value is adjusted, and small molecular organic matters and divalent ions are efficiently removed by utilizing the selective interception characteristic of a nanofiltration membrane, so that the cyclic utilization of water resources is realized, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of naphthoquinone production technology, specifically to a device for recycling naphthoquinone production waste. Background Technology

[0002] Naphthalene is one of the most important polycyclic aromatic hydrocarbons in industry, and oxygen-containing organic chemicals synthesized through oxidation reactions occupy an important position in petrochemical products. Oxidation reactions can convert naphthalene into 1,4-naphthoquinone. 1,4-Naphthoquinone is an important raw material in fine chemicals, and an intermediate in pharmaceuticals, dyes, fragrances, pesticides, and plasticizers. It is both a polymerization regulator in the synthesis of rubber and resins, and an important raw material for the synthesis of novel papermaking cooking auxiliaries.

[0003] The production of naphthoquinone generates various types of waste. The waste residue mainly consists of unreacted raw materials, catalysts, and byproducts containing heavy metal impurities. Direct discharge of this waste residue not only wastes resources but also causes severe pollution to soil and water bodies due to the heavy metals present. Simultaneously, the production process generates high-concentration organic wastewater containing large amounts of recalcitrant organic compounds. Direct discharge without treatment will cause significant damage to the natural ecosystem. Currently, most methods for treating naphthoquinone production waste are relatively simple and rudimentary, failing to effectively recover useful components, resulting in high treatment costs and poor environmental performance. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a device for recycling naphthoquinone production waste, which addresses the shortcomings of the existing technology, achieves efficient recovery of useful components in naphthoquinone production waste, reduces environmental pollution from waste, improves resource utilization, and reduces production costs.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A device for recycling naphthoquinone production waste includes a waste residue tank. The outlet of the waste residue tank is connected to an acid leaching tank via a pipeline. The inlet of the acid leaching tank is connected to an acid solution tank via a pipeline. The outlet of the acid leaching tank is connected to a centrifuge via a pipeline. The liquid phase outlet of the centrifuge is connected to a concentration tank via a pipeline. The inlet of the concentration tank is connected to a precipitant tank via a pipeline. The outlet of the concentration tank is connected to a first filter via a pipeline. The liquid phase outlet of the first filter is connected to a reaction tank via a pipeline. The inlet of the reaction tank is connected to an oxidant tank and an alkali solution tank via pipelines. The outlet of the reaction tank is connected to a nanofiltration membrane device via a pipeline. The treatment of the nanofiltration membrane device is connected to a treated water recovery tank via a pipeline.

[0007] As an improved technical solution, the outlet of the waste residue tank is connected to a crushing tank via a pipeline, and the outlet of the crushing tank is connected to the acid leaching tank via a pipeline.

[0008] As an improved technical solution, the solid phase outlet of the centrifuge is connected to a solid residue tank via a pipeline.

[0009] As an improved technical solution, the liquid phase outlet of the first filter is connected to an adsorption tank via a pipeline, the inlet of the adsorption tank is connected to an activated carbon tank via a pipeline, the outlet of the adsorption tank is connected to a second filter via a pipeline, and the liquid phase outlet of the second filter is connected to the reaction tank via a pipeline.

[0010] As an improved technical solution, the solid phase outlet of the first filter is connected to a heavy metal precipitation tank.

[0011] As an improved technical solution, the outlet of the heavy metal precipitation tank is connected to a regulating tank via a pipeline, the inlet of the regulating tank is connected to a nitric acid solution tank and a reducing agent tank via pipelines, the outlet of the regulating tank is connected to a third filter via a pipeline, the solid phase outlet of the third filter is connected to a dryer via a pipeline, and the outlet of the dryer is connected to a heavy metal recovery tank.

[0012] As a preferred technical solution, the solid phase outlet of the third filter is connected to a washing tank via a pipeline, the inlet of the washing tank is connected to a purified water tank via a pipeline, and the outlet of the washing tank is connected to the dryer via a pipeline.

[0013] As a preferred technical solution, the nanofiltration membrane device has a molecular weight cutoff of 200-1000 Da.

[0014] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] This invention relates to a device for recycling naphthoquinone production waste, comprising a waste residue tank. The outlet of the waste residue tank is connected via a pipeline to an acid leaching tank. The inlet of the acid leaching tank is connected via a pipeline to an acid solution tank. The outlet of the acid leaching tank is connected via a pipeline to a centrifuge. The liquid phase outlet of the centrifuge is connected via a pipeline to a concentration tank. The inlet of the concentration tank is connected via a pipeline to a precipitant tank. The outlet of the concentration tank is connected via a pipeline to a first filter. The liquid phase outlet of the first filter is connected via a pipeline to a reaction tank. The inlets of the reaction tank are connected via pipelines to an oxidant tank and an alkali solution tank. The outlet of the reaction tank is connected via a pipeline to a nanofiltration membrane device. The treatment process of the nanofiltration membrane device is connected via a pipeline to a treated water recovery tank. The acid leaching tank enables controlled mixing of the waste residue and acid solution, providing a stable reaction environment for subsequent heavy metal dissolution and improving acid leaching efficiency. The liquid phase of the centrifuge concentrates and enriches heavy metal ions, reducing the amount of precipitant used, lowering processing costs, and simultaneously improving precipitation efficiency. The filtrate phase of the first filter decomposes residual organic matter through oxidation and adjusts the pH value. Utilizing the selective retention characteristics of nanofiltration membranes, it efficiently removes small molecule organic matter and divalent ions, achieving water resource recycling and reducing production costs.

[0016] The outlet of the waste residue tank of this invention is connected to a crushing tank via a pipeline, and the outlet of the crushing tank is connected to the acid leaching tank via a pipeline. Pre-crushing reduces the particle size of the waste residue, increases the acid leaching contact area, improves the heavy metal leaching rate, and reduces acid consumption.

[0017] The solid phase outlet of the centrifuge is connected to a solid residue tank via a pipeline. This enables centralized collection of solid residue, facilitating subsequent resource utilization in building materials or safe landfill, and reducing solid waste pollution.

[0018] The liquid phase outlet of the first filter is connected to an adsorption tank via a pipeline. The inlet of the adsorption tank is connected to an activated carbon tank via a pipeline. The outlet of the adsorption tank is connected to a second filter via a pipeline. The liquid phase outlet of the second filter is connected to the reaction tank via a pipeline. Activated carbon adsorption is used to deeply remove organic matter, reducing the burden of subsequent oxidation, lowering the amount of oxidant used, and improving the economic efficiency of the treatment.

[0019] The solid phase outlet of the first filter is connected to a heavy metal precipitation tank. This allows for the separate collection of heavy metal precipitates, avoiding cross-contamination and improving the purity of subsequent recovery.

[0020] The outlet of the heavy metal precipitation tank is connected to a regulating tank via a pipeline. The inlet of the regulating tank is connected to a nitric acid solution tank and a reducing agent tank via pipelines. The outlet of the regulating tank is connected to a third filter via a pipeline. The solid phase outlet of the third filter is connected to a dryer via a pipeline. The outlet of the dryer is connected to a heavy metal recovery tank. High-purity recovery of heavy metals is achieved through the acid dissolution-reduction process, with a recovery rate exceeding 95%, resulting in significant economic benefits.

[0021] The solid phase outlet of the third filter is connected to a washing tank via a pipeline. The inlet of the washing tank is connected to a purified water tank via a pipeline, and the outlet of the washing tank is connected to the dryer via a pipeline. Washing removes impurity ions, improving the purity of the heavy metal product and meeting industrial reuse standards.

[0022] The nanofiltration membrane device has a molecular weight cutoff of 200-1000 Da. It precisely retains organic matter and divalent salts while allowing monovalent ions to pass through, reducing membrane pressure drop and energy consumption while ensuring water quality. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0025] The components include: 1. Waste residue tank; 2. Acid leaching tank; 3. Acid solution tank; 4. Centrifuge; 5. Concentrator tank; 6. Precipitator tank; 7. First filter; 8. Reaction tank; 9. Oxidant tank; 10. Alkali solution tank; 11. Nanofiltration membrane device; 12. Treated water recovery tank; 13. Crushing tank; 14. Solid residue tank; 15. Adsorption tank; 16. Activated carbon tank; 17. Second filter; 18. Heavy metal precipitation tank; 19. Adjustment tank; 20. Nitric acid solution tank; 21. Reducing agent tank; 22. Third filter; 23. Dryer; 24. Heavy metal recovery tank; 25. Washing tank; 26. Purified water tank. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1As shown, a device for recycling naphthoquinone production waste includes a waste residue tank 1. The outlet of the waste residue tank 1 is connected to an acid leaching tank 2 via a pipeline. The inlet of the acid leaching tank 2 is connected to an acid solution tank 3 via a pipeline. The outlet of the acid leaching tank 2 is connected to a centrifuge 4 via a pipeline. The liquid phase outlet of the centrifuge 4 is connected to a concentration tank 5 via a pipeline. The inlet of the concentration tank 5 is connected to a precipitant tank 6 via a pipeline. The outlet of the concentration tank 5 is connected to a first filter 7 via a pipeline. The liquid phase outlet of the first filter 7 is connected to a reaction tank 8 via a pipeline. The inlet of the reaction tank 8 is connected to an oxidant tank 9 and an alkali solution tank 10 via pipelines. The outlet of the reaction tank 8 is connected to a nanofiltration membrane device 11 via a pipeline. The treatment of the nanofiltration membrane device 11 is connected to a treated water recovery tank 12 via a pipeline. The acid leaching tank 2 enables controlled mixing of waste residue and acid solution, providing a stable reaction environment for subsequent heavy metal dissolution and improving acid leaching efficiency. The liquid phase in centrifuge 4 is concentrated and enriched with heavy metal ions, reducing the amount of precipitant used, lowering treatment costs, and improving precipitation efficiency. The filtrate phase in the first filter 7 is oxidized and decomposed to remove residual organic matter and adjust the pH value. Utilizing the selective retention characteristics of nanofiltration membranes, it efficiently removes small molecule organic matter and divalent ions, achieving water resource recycling and reducing production costs.

[0028] The outlet of the waste residue tank 1 is connected to a crushing tank 13 via a pipeline, and the outlet of the crushing tank 13 is connected to the acid leaching tank 2 via a pipeline. Pre-crushing reduces the particle size of the waste residue, increases the acid leaching contact area, improves the heavy metal leaching rate, and reduces acid consumption.

[0029] The solid phase outlet of the centrifuge 4 is connected to a solid residue tank 14 via a pipeline. This enables centralized collection of solid residue, facilitating subsequent resource utilization of building materials or safe landfill, and reducing solid waste pollution.

[0030] The liquid phase outlet of the first filter 7 is connected to an adsorption tank 15 via a pipeline. The inlet of the adsorption tank 15 is connected to an activated carbon tank 16 via a pipeline. The outlet of the adsorption tank 15 is connected to a second filter 17 via a pipeline. The liquid phase outlet of the second filter 17 is connected to the reaction tank 8 via a pipeline. Activated carbon adsorption is used to deeply remove organic matter, reducing the burden of subsequent oxidation, lowering the amount of oxidant used, and improving the economic efficiency of the treatment.

[0031] The solid phase outlet of the first filter 7 is connected to a heavy metal precipitation tank 18. This allows for the separate collection of heavy metal precipitates, avoiding cross-contamination and improving the purity of subsequent recovery.

[0032] The outlet of the heavy metal precipitation tank 18 is connected to a regulating tank 19 via a pipeline. The inlet of the regulating tank 19 is connected to a nitric acid solution tank 20 and a reducing agent tank 21 via pipelines. The outlet of the regulating tank 19 is connected to a third filter 22 via a pipeline. The solid phase outlet of the third filter 22 is connected to a dryer 23 via a pipeline. The outlet of the dryer 23 is connected to a heavy metal recovery tank 24. High-purity recovery of heavy metals is achieved through the acid dissolution-reduction process, with a recovery rate exceeding 95%, resulting in significant economic benefits.

[0033] The solid phase outlet of the third filter 22 is connected to a washing tank 25 via a pipeline. The inlet of the washing tank 25 is connected to a purified water tank 26 via a pipeline. The outlet of the washing tank 25 is connected to the dryer 23 via a pipeline. Washing removes impurity ions, improving the purity of heavy metal products and meeting industrial reuse standards.

[0034] The nanofiltration membrane device 11 has a molecular weight cutoff of 200-1000 Da. It precisely retains organic matter and divalent salts while allowing monovalent ions to pass through, reducing membrane pressure drop and energy consumption while ensuring water quality.

[0035] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A device for recycling naphthoquinone production waste, comprising a waste residue tank, characterized in that: The outlet of the waste residue tank is connected to an acid leaching tank via a pipeline. The inlet of the acid leaching tank is connected to an acid solution tank via a pipeline. The outlet of the acid leaching tank is connected to a centrifuge via a pipeline. The liquid phase outlet of the centrifuge is connected to a concentration tank via a pipeline. The inlet of the concentration tank is connected to a precipitant tank via a pipeline. The outlet of the concentration tank is connected to a first filter via a pipeline. The liquid phase outlet of the first filter is connected to a reaction tank via a pipeline. The inlet of the reaction tank is connected to an oxidant tank and an alkali solution tank via pipelines. The outlet of the reaction tank is connected to a nanofiltration membrane device via a pipeline. The treatment of the nanofiltration membrane device is connected to a treated water recovery tank via a pipeline.

2. The device for recycling naphthoquinone production waste as described in claim 1, characterized in that: The outlet of the waste residue tank is connected to a crushing tank via a pipeline, and the outlet of the crushing tank is connected to the acid leaching tank via a pipeline.

3. The device for recycling naphthoquinone production waste as described in claim 1, characterized in that: The solid phase outlet of the centrifuge is connected to a solid residue tank via a pipeline.

4. The device for recycling naphthoquinone production waste as described in claim 1, characterized in that: The liquid phase outlet of the first filter is connected to an adsorption tank via a pipeline, the inlet of the adsorption tank is connected to an activated carbon tank via a pipeline, the outlet of the adsorption tank is connected to a second filter via a pipeline, and the liquid phase outlet of the second filter is connected to the reaction tank via a pipeline.

5. The device for recycling naphthoquinone production waste as described in claim 1, characterized in that: The solid phase outlet of the first filter is connected to a heavy metal precipitation tank.

6. The device for recycling naphthoquinone production waste as described in claim 5, characterized in that: The outlet of the heavy metal precipitation tank is connected to a regulating tank via a pipeline. The inlet of the regulating tank is connected to a nitric acid solution tank and a reducing agent tank via pipelines. The outlet of the regulating tank is connected to a third filter via a pipeline. The solid phase outlet of the third filter is connected to a dryer via a pipeline. The outlet of the dryer is connected to a heavy metal recovery tank.

7. The device for recycling naphthoquinone production waste as described in claim 6, characterized in that: The solid phase outlet of the third filter is connected to a washing tank via a pipeline, the inlet of the washing tank is connected to a purified water tank via a pipeline, and the outlet of the washing tank is connected to the dryer via a pipeline.

8. The device for recycling naphthoquinone production waste as described in claim 1, characterized in that: The nanofiltration membrane device has a molecular weight cutoff of 200-1000 Da.

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