Wastewater recovery device for producing maleic anhydride hydrogenation catalyst
By combining reverse osmosis and distillation technology, the problem of the need for a large amount of chemical reagents for wastewater treatment of the production of malaria hydrogenation catalysts is solved, and efficient, economical and environmentally friendly wastewater recycling is achieved.
Patent Information
- Application Number
- CN202420251995.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-02
AI Technical Summary
The prior art requires the introduction of a large amount of chemical reagents when treating wastewater generated during the production process of a manic anhydride hydrogenation catalyst, which increases costs and is detrimental to the environment.
By combining reverse osmosis technology and distillation technology, efficient treatment and recycling of wastewater is achieved through primary separation units, reverse osmosis separation units and high-efficiency wastewater treatment units.
It realizes efficient separation of organic matter and inorganic salts in wastewater without adding any chemicals, and sustainable resource recycling, reducing the cost of wastewater treatment and better environmental protection.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the field of waste water recovery generated in the process of catalyst production, in particular to a waste water recovery device in the process of maleic anhydride hydrogenation catalyst production. Background Art
[0002] Maleic anhydride hydrogenation can produce a variety of important chemical products, such as γ-butyrolactone and succinic acid. γ-butyrolactone can be used to synthesize fine chemical raw materials such as pyrrolidone, phenylbutyric acid, acetylbutyrolactone, cyclopropylamine, etc. Succinic acid is widely used in pharmaceutical intermediates, food additives and surfactants. It can also be used as a monomer for degradable plastics to synthesize degradable plastics such as polybutylene succinate, butylene terephthalate and butylene adipate. With the gradual maturity of maleic anhydride hydrogenation production technology, production capacity is also further expanded. However, the most important thing in maleic anhydride hydrogenation production technology is that catalyst production will produce a large amount of wastewater. The organic matter and inorganic salts contained in the wastewater have a negative impact on the environment and also waste valuable resources. At present, the wastewater generated in the production process of maleic anhydride hydrogenation catalyst is generally treated by adding different chemical reagents to adjust the pH value and acidifying water treatment. These methods require the purchase of additional treatment chemicals, which should not only increase the cost but also be unfavorable to the environment. Therefore, there is an urgent need for a new type of wastewater treatment device that can efficiently remove pollutants in wastewater without adding other chemicals, so as to achieve sustainable recycling of resources and reduce the cost of wastewater treatment. Utility Model Content
[0003] The purpose of the utility model is a wastewater recovery device for producing maleic anhydride hydrogenation catalyst. The utility model adopts a combination of reverse osmosis technology and distillation technology to achieve efficient treatment of wastewater produced by maleic anhydride hydrogenation catalyst. It provides a more efficient, environmentally friendly, economical and sustainable wastewater treatment solution for the maleic anhydride hydrogenation catalyst production process.
[0004] The purpose of the utility model is achieved as follows: a wastewater recovery device for producing maleic anhydride hydrogenation catalyst comprises a wastewater collecting tank, characterized in that a water inlet is arranged on the upper right side of the wastewater collecting tank, the water inlet is connected to a pipeline for receiving wastewater from above, the left side is connected to a primary separation unit through a pipeline, the primary separation unit is connected to a reverse osmosis separation unit through a pipeline, and the upper part of the reverse osmosis separation unit is connected to a high-efficiency wastewater treatment unit through a pipeline; the high-efficiency wastewater treatment unit is composed of an evaporator and a condenser, the left side of the evaporator is connected to the right side of the reverse osmosis separation unit through a pipeline, the left side of the condenser is connected to the evaporator through a pipeline, and the lower part of the condenser is connected to a desalted water tank.
[0005] The purpose of the utility model can also be achieved as follows: multiple layers of filter screens with different filter diameters are arranged inside the primary separation unit, and the filter diameters gradually decrease from right to left.
[0006] The primary separation unit is internally provided with three layers of metal filter screens with different filter diameters, and the filter diameters from right to left are 80 mesh, 200 mesh and 1500 mesh respectively.
[0007] The reverse osmosis separation unit is provided with a water inlet on the right side and a water outlet on the top, and has a reverse osmosis membrane and a pressure pump inside; the reverse osmosis membrane parameters are set to effectively intercept all dissolved salts and organic matter with a molecular weight greater than 100, while allowing water molecules to pass through, and the pressure is set to 1-2MPa.
[0008] The evaporator is divided into two layers, the inner layer is the evaporating sewage layer, and is provided with a pipeline for collecting organic matter; the outer layer is the steam heating layer, and the outlet of the steam heating pipe of the steam heating layer is connected to the desalted water tank through a pipeline.
[0009] The condenser is provided with a condensing pipe inside, and the condensing pipe is connected with an external circulating water pipe.
[0010] A water inlet is arranged above the desalted water tank, a water outlet is connected to an external water pipe, and a liquid level meter is arranged outside.
[0011] The wastewater collection tank is fixed at a height of 1.5 meters from the ground, and a liquid level meter is arranged outside the wastewater collection tank.
[0012] The utility model has the following beneficial effects:
[0013] The utility model aims to solve the challenge of the existing technology that the wastewater treatment of maleic anhydride hydrogenation catalyst needs to introduce other chemical reagents. The wastewater is treated and recycled by creatively combining reverse osmosis technology with distillation technology, achieving efficient and economical wastewater recycling. The utility model uses innovative technical measures combining reverse osmosis membranes and distillation to efficiently and quickly separate inorganic salts and organic matter, thereby achieving efficient recycling of water resources. Because the reverse osmosis membrane has chemical resistance and pollution resistance and can be rinsed and reused, compared with the existing technology that requires the introduction of a large amount of other chemicals to adjust the pH value and adjust the acid water, the utility model is more economical and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the utility model structure DETAILED DESCRIPTION
[0015] In order to enable those skilled in the art to better understand the technical solution of the utility model, the technical solution is further described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the technical solution of the utility model, not all of it. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.
[0016] See also Figure 1 A device for recovering wastewater from the production of maleic anhydride hydrogenation catalyst comprises a wastewater collecting tank, a primary separation unit, a reverse osmosis separation unit, a high-efficiency wastewater treatment unit and a desalted water tank. The right side of the wastewater collecting tank is connected to the wastewater above through a connecting pipe, the left side of the wastewater collecting tank is connected to the primary separation unit through a connecting pipe, the primary separation unit is connected to the reverse osmosis separation unit through a connecting pipe, the upper part of the reverse osmosis separation unit is connected to the high-efficiency wastewater treatment unit through a pipe, and the high-efficiency wastewater treatment unit is connected to the desalted water tank through a connecting pipe.
[0017] The wastewater collection tank is fixed at a height of 1.5 meters from the ground. It is provided with a water inlet on the top, a water outlet on the left, and a liquid level meter on the outside. Wastewater enters the wastewater collection tank from the upper pipe for collection and buffering. By raising the position of the wastewater collection tank and utilizing the height difference, the wastewater flows by gravity from the left into the primary separation unit.
[0018] There are three layers of filter screens with different filter diameters inside the primary separation unit. The filter diameters gradually decrease from right to left. The three layers of metal filter screens can be designed as 80 mesh, 200 mesh and 1500 mesh respectively. Wastewater enters the primary separator through the right water inlet. First, solid particles larger than 180 microns are separated through an 80-mesh filter screen, and then solid particles larger than 75 microns are separated through a 200-mesh filter screen. Solid particles larger than 8 microns are separated through a 1500-mesh filter screen. In this way, solid waste generated during catalyst manufacturing and catalysts of about 10 microns are separated. The separated solid particles can be discharged from the bottom.
[0019] The reverse osmosis separation unit has a reverse osmosis membrane and a pressure pump. The reverse osmosis membrane parameters are to effectively intercept 98% of dissolved salts and organic matter with a molecular weight greater than 100, while allowing water molecules to pass through. The pressure is set to 1-2MPa. The wastewater separated by the primary separation unit enters the anti-permeability membrane for filtration through the pressure pump at the water inlet of the reverse osmosis separation unit, and the purified wastewater is discharged from the outlet to the high-efficiency wastewater treatment unit above.
[0020] The high-efficiency wastewater treatment unit includes an evaporator and a condenser. The evaporator is divided into two layers, the inner layer is the evaporation sewage layer, the inner layer is provided with a pipe for collecting organic matter, and the outer layer is the steam heating layer. The cooling water after steam heating is connected to the desalted water tank through an external connecting pipe for recovery. There is a condenser tube inside the condenser, which is connected to the external circulating water pipe. The left side of the condenser is connected to the evaporator through a connecting pipe, and the lower part is connected to the desalted water tank. Wastewater containing only trace organic matter and salt enters the evaporator and is heated by the superheated steam in the outer steam heating pipe to evaporate the water. The evaporated water vapor enters the condenser through the pipe for cooling. The cooled water enters the desalted water tank below for standby use, and the organic matter and inorganic salts left at the bottom flow out through the pipe.
[0021] The utility model realizes the efficient separation of maleic anhydride hydrogenation catalyst wastewater without adding any chemicals. The existing catalyst production technology uses a large amount of chemicals to adjust the pH of the wastewater, acid water treatment, precipitation treatment, etc. to treat the wastewater. Compared with the existing catalyst production process wastewater recovery technology, the utility model can separate most of the organic matter and inorganic salts produced by the production of maleic anhydride catalyst without adding any chemicals, and uses reverse osmosis membrane technology combined with distillation technology. It is more efficient, environmentally friendly and economical without using chemicals.
[0022] The above description is only a preferred implementation mode of the present utility model and is not intended to limit the protection scope of the present utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made should be included in the protection scope of the present utility model.
Claims
1. A wastewater recovery device for producing maleic anhydride hydrogenation catalyst, comprising a wastewater collection tank, characterized in that: A water inlet is arranged on the upper right side of the wastewater collection tank, the water inlet is connected to a pipe for receiving wastewater from above, the left side is connected to a primary separation unit through a pipe, the primary separation unit is connected to a reverse osmosis separation unit through a pipe, and the upper part of the reverse osmosis separation unit is connected to a high-efficiency wastewater treatment unit through a pipe; the high-efficiency wastewater treatment unit is composed of an evaporator and a condenser, the left side of the evaporator is connected to the right side of the reverse osmosis separation unit through a pipe, the left side of the condenser is connected to the evaporator through a pipe, and the lower part of the condenser is connected to a desalted water tank; The reverse osmosis separation unit is provided with a water inlet on the right side and a water outlet on the top, and has a reverse osmosis membrane and a pressure pump inside; the reverse osmosis membrane parameters are set to effectively intercept all dissolved salts and organic matter with a molecular weight greater than 100, while allowing water molecules to pass through, and the pressure is set to 1-2MPa; The evaporator is divided into two layers, the inner layer is the evaporation sewage layer, and is provided with a pipeline for collecting organic matter; the outer layer is the steam heating layer, and the outlet of the steam heating pipe of the steam heating layer is connected to the desalted water tank through a pipeline; The condenser is provided with a condensing pipe inside, and the condensing pipe is connected with an external circulating water pipe.
2. A wastewater recovery device for producing maleic anhydride hydrogenation catalyst according to claim 1, characterized in that: The primary separation unit is internally provided with multiple layers of filter screens with different filter diameters, and the filter diameters gradually decrease from right to left.
3. A wastewater recovery device for producing maleic anhydride hydrogenation catalyst according to claim 2, characterized in that: The primary separation unit is internally provided with three layers of metal filter screens with different filter diameters, and the filter diameters from right to left are 80 mesh, 200 mesh and 1500 mesh respectively.
4. The wastewater recovery device for producing maleic anhydride hydrogenation catalyst according to claim 1, characterized in that: A water inlet is arranged above the desalted water tank, a water outlet is connected to an external water pipe, and a liquid level meter is arranged outside.
5. The wastewater recovery device for producing maleic anhydride hydrogenation catalyst according to claim 1, characterized in that: The wastewater collection tank is fixed at a height of 1.5 meters from the ground, and a liquid level meter is arranged outside the wastewater collection tank.