A wastewater recovery device for hydroxypropyl methylcellulose production

Abstract

This application discloses a wastewater recovery device for hydroxypropyl methylcellulose production, belonging to the field of chemical wastewater treatment technology. It includes a wastewater equalization tank, a primary filter at the bottom of the equalization tank, and an ultrafiltration membrane module and a reverse osmosis membrane module on one side of the primary filter. The wastewater equalization tank, primary filter, and ultrafiltration membrane module are all connected by pipelines. The ultrafiltration membrane module includes an ultrafiltration membrane treatment tank, which is connected to the primary filter by pipelines. A separation pipe and a collection pipe are installed outside the ultrafiltration membrane treatment tank, both of which are connected to the interior of the ultrafiltration membrane treatment tank. In use, this device effectively removes internal impurities from the wastewater through multi-stage filtration, effectively reducing membrane fouling, extending membrane lifespan, and improving wastewater treatment efficiency and continuity; it also reduces operating costs and achieves efficient recovery of useful components.

Description

Technical Field

[0001] This application relates to the field of chemical wastewater treatment technology, and in particular to a wastewater recovery device for the production of hydroxypropyl methylcellulose. Background Technology

[0002] Hydroxypropyl methylcellulose (HPMC) is an important chemical raw material widely used in construction, medicine, food and other fields. Its production process generates a large amount of high-concentration organic wastewater containing unreacted raw materials, by-products and solvents. At present, the chemical industry mainly uses physicochemical methods, biological methods and membrane separation technology to treat high-concentration organic wastewater. With increasingly stringent environmental protection requirements, how to efficiently recover useful components from wastewater and reduce treatment costs has become an urgent problem for the industry to solve.

[0003] Existing technologies suffer from problems such as low treatment efficiency, high operating costs, and severe membrane fouling. In particular, membrane separation technology suffers from flux decline and frequent cleaning due to membrane fouling during long-term operation, which seriously affects the continuity and economy of wastewater treatment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a wastewater recovery device for hydroxypropyl methylcellulose production, which overcomes the deficiencies of existing technologies and aims to solve problems such as low treatment efficiency, high operating costs, and severe membrane fouling in existing technologies. In particular, membrane separation technology suffers from flux decline and frequent cleaning due to membrane fouling during long-term operation, which seriously affects the continuity and economy of wastewater treatment.

[0005] To achieve the above objectives, this application provides the following technical solution: a wastewater recovery device for hydroxypropyl methylcellulose production, comprising a wastewater equalization tank, a primary filter at the bottom of the wastewater equalization tank, an ultrafiltration membrane module and a reverse osmosis membrane module on one side of the primary filter, the wastewater equalization tank, the primary filter and the ultrafiltration membrane module being connected by pipelines, the ultrafiltration membrane module including an ultrafiltration membrane treatment tank, the ultrafiltration membrane treatment tank being connected to the primary filter by pipelines, and a separation pipe and a collection pipe being provided on the outside of the ultrafiltration membrane treatment tank. Both the separation tube and the collection tube are connected to the interior of the ultrafiltration membrane treatment tank. A pump motor is provided at one end of the collection tube, and an input tube is provided at the output end of the pump motor. The reverse osmosis membrane assembly includes a reverse osmosis membrane treatment tank, which is connected to the input tube. The bottom of the reverse osmosis membrane treatment tank is provided with a concentrate outlet and a clear liquid outlet. A collection assembly is provided at one end of both the concentrate outlet and the clear liquid outlet. The collection assembly includes a concentrate storage tank and a clear liquid storage tank, which are respectively connected to the concentrate outlet and the clear liquid outlet.

[0006] By adopting the above technical solution and setting up a wastewater equalization tank, the wastewater generated during production first enters the wastewater equalization tank. After pH adjustment, it is discharged into the primary filter for filtration, and then directly enters the ultrafiltration membrane module. Inside the ultrafiltration membrane module, large organic molecules in the wastewater are retained. The permeate then enters the reverse osmosis membrane module for further concentration. The concentrate and clarified liquid are discharged into the concentrate storage tank and clarified liquid storage tank respectively. In this way, during use, multi-stage filtration can effectively remove internal impurities from the wastewater, effectively reduce membrane fouling, extend membrane life, improve wastewater treatment efficiency and continuity, reduce operating costs, and achieve efficient recovery of useful components.

[0007] As a preferred technical solution of this application, the primary filter includes a filter box, a side panel is provided on one side of the filter box, and multiple sets of filter plates are provided inside the filter box, with one side of the multiple sets of filter plates fixedly connected to the side panel.

[0008] By adopting the above technical solution and setting a primary filter, multiple filter plates can be quickly replaced by opening and closing the side panel during use. After long-term use, they can be cleaned quickly, further ensuring filtration efficiency and improving stability during use.

[0009] As a preferred technical solution of this application, a coarse filter screen is provided inside the wastewater regulating tank, the coarse filter screen is located in the middle of the interior of the wastewater regulating tank, and a top cover is provided on the top of the wastewater regulating tank.

[0010] By adopting the above technical solution and setting up a coarse filter screen, the wastewater entering the wastewater equalization tank can be initially filtered during use, removing large particles of debris, which can effectively reduce the pressure on subsequent filtration and improve the stability during use.

[0011] As a preferred technical solution of this application, both the ultrafiltration membrane treatment tank and the reverse osmosis membrane treatment tank are configured in multiple groups, and the multiple groups of ultrafiltration membrane treatment tanks and reverse osmosis membrane treatment tanks are arranged in parallel.

[0012] By adopting the above technical solution and setting up multiple sets of ultrafiltration membrane treatment tanks and multiple sets of reverse osmosis membrane treatment tanks, the efficiency of membrane separation can be further improved, the separation effect can be enhanced, and the operation can be more stable.

[0013] As a preferred technical solution of this application, the ultrafiltration membrane module and the reverse osmosis membrane module are provided with an external frame, and a control panel is provided on the outside of the external frame.

[0014] By adopting the above technical solution and setting up a control panel, the device becomes more convenient to use and its overall usability is improved.

[0015] As a preferred technical solution of this application, a conveying motor is provided between the primary filter and the ultrafiltration membrane assembly, and the conveying motor is electrically connected to the control panel.

[0016] By adopting the above technical solution and setting up a conveyor motor, the efficiency of wastewater entering the ultrafiltration membrane module and reverse osmosis membrane module can be improved during use, ensuring the stability of the overall filtration pressure.

[0017] As a preferred technical solution of this application, the filter box is provided with multiple sets of stabilizing components, and the filter plate is slidably connected to the inside of the stabilizing components.

[0018] By adopting the above technical solution and setting up a stabilizing component, the filter plate can slide inside the stabilizing component during use, ensuring the stability of the filter plate installed inside the filter box and improving the practicality of the device.

[0019] As a preferred technical solution of this application, both the concentrated liquid storage tank and the clear liquid storage tank are provided with observation ports on their outer walls, and two sets of fixing rods are provided above the coarse filter screen.

[0020] By adopting the above technical solution and setting up observation ports, the internal liquid levels of the concentrate storage tank and the clear liquid storage tank can be observed in real time from the outside during use. The fixed rods can also make it easier to remove the coarse filter screen from the inside of the wastewater equalization tank, making it more convenient to use.

[0021] The beneficial effects of this application are:

[0022] 1. By setting up a wastewater equalization tank, the wastewater generated during production first enters the equalization tank. After pH adjustment, it is discharged into the primary filter for filtration, and then directly into the ultrafiltration membrane module. The ultrafiltration membrane module retains large organic molecules in the wastewater. The permeate then enters the reverse osmosis membrane module for further concentration. The concentrate and clarified liquid are simultaneously discharged into the concentrate storage tank and clarified liquid storage tank, respectively. This multi-stage filtration effectively removes impurities from the wastewater, reducing membrane fouling, extending membrane lifespan, improving wastewater treatment efficiency and continuity, lowering operating costs, and achieving efficient recovery of useful components.

[0023] 2. By setting up a primary filter, multiple filter plates can be quickly replaced by opening and closing the side panel during use. After long-term use, they can be cleaned quickly to further ensure filtration efficiency and improve stability during use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this application;

[0025] Figure 2 This is a schematic diagram of the structure of the ultrafiltration membrane module and the reverse osmosis membrane module of this application;

[0026] Figure 3 This is a schematic diagram of the internal structure of the primary filter in this application;

[0027] Figure 4 This is a schematic diagram of the internal structure of the wastewater equalization tank in this application.

[0028] In the diagram: 1. Wastewater equalization tank; 101. Coarse filter screen; 102. Top cover; 103. Fixing rod; 2. Primary filter; 201. Filter box; 202. Side panel; 203. Filter plate; 204. Stabilizer; 3. Ultrafiltration membrane module; 301. Ultrafiltration membrane treatment tank; 302. Collection pipe; 303. Pump motor; 304. Separation pipe; 305. Input pipe; 4. Reverse osmosis membrane module; 401. Reverse osmosis membrane treatment tank; 402. Concentrate outlet; 403. Clarified liquid outlet; 5. Collection module; 501. Concentrate storage tank; 502. Clarified liquid storage tank; 503. Observation port; 6. Conveyor motor; 7. External frame; 701. Control panel. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] Reference Figure 1-4A wastewater recovery device for hydroxypropyl methylcellulose production includes a wastewater equalization tank 1. A primary filter 2 is installed at the bottom of the wastewater equalization tank 1. An ultrafiltration membrane module 3 and a reverse osmosis membrane module 4 are installed on one side of the primary filter 2. The wastewater equalization tank 1, the primary filter 2, and the ultrafiltration membrane module 3 are all connected by pipelines. The ultrafiltration membrane module 3 includes an ultrafiltration membrane treatment tank 301, which is connected to the primary filter 2 by pipelines. A separation pipe 304 and a collection pipe 302 are installed outside the ultrafiltration membrane treatment tank 301. Both the separation pipe 304 and the collection pipe 302 are connected to the interior of the ultrafiltration membrane treatment tank 301. A pump motor 303 is installed at one end of the collection pipe 302 for pumping... The output end of the motor 303 is provided with an input pipe 305. The reverse osmosis membrane module 4 includes a reverse osmosis membrane treatment tank 401, which is connected to the input pipe 305. The bottom of the reverse osmosis membrane treatment tank 401 is provided with a concentrate outlet 402 and a clear liquid outlet 403. One end of the concentrate outlet 402 and the clear liquid outlet 403 is provided with a collection component 5. The collection component 5 includes a concentrate storage tank 501 and a clear liquid storage tank 502, which are respectively connected to the concentrate outlet 402 and the clear liquid outlet 403. The wastewater equalization tank 1 is provided with a coarse filter screen 101, which is located in the middle of the wastewater equalization tank 1. The top of the wastewater equalization tank 1 is provided with a top cover 102.

[0031] By setting up a wastewater equalization tank 1, the wastewater generated during production first enters the wastewater equalization tank 1. After pH adjustment inside the wastewater equalization tank 1, it is discharged into the primary filter 2 for filtration, and then directly enters the ultrafiltration membrane module 3. Inside the ultrafiltration membrane module 3, large molecular organic matter in the wastewater is intercepted. The permeate after completion enters the reverse osmosis membrane module 4 for further concentration. The concentrate and the clarified liquid are discharged into the concentrate storage tank 501 and the clarified liquid storage tank 502 at the same time. In this way, during use, the internal impurities of the wastewater can be effectively removed through multi-stage filtration, which can effectively reduce membrane fouling, extend membrane life, and improve wastewater treatment efficiency and continuity; reduce operating costs and achieve efficient recovery of useful components. By setting up a coarse filter screen 101, the wastewater entering the wastewater equalization tank 1 can be initially filtered to remove large particles of debris, which can effectively reduce the pressure on subsequent filtration and improve the stability during use.

[0032] Reference Figure 1-4The primary filter 2 includes a filter box 201, with a side panel 202 on one side. Multiple filter plates 203 are installed inside the filter box 201, with one side of each filter plate 203 fixedly connected to the side panel 202. Both the ultrafiltration membrane treatment tank 301 and the reverse osmosis membrane treatment tank 401 are configured in multiple groups, and these tanks are connected in parallel. A conveyor motor 6 is installed between the primary filter 2 and the ultrafiltration membrane assembly 3, and the conveyor motor 6 is electrically connected to the control panel 701. By installing the primary filter 2, during use… Multiple filter plates 203 can be quickly replaced by opening and closing the side panel 202. They can also be quickly cleaned after long-term use, further ensuring filtration efficiency and improving stability during operation. The inclusion of multiple ultrafiltration membrane treatment tanks 301 and multiple reverse osmosis membrane treatment tanks 401 further enhances membrane separation efficiency and improves separation effect, resulting in greater stability during operation. The inclusion of the conveyor motor 6 increases the efficiency of wastewater entering the ultrafiltration membrane module 3 and reverse osmosis membrane module 4, ensuring the stability of the overall filtration pressure.

[0033] Reference Figure 1-4 The ultrafiltration membrane module 3 and the reverse osmosis membrane module 4 are externally equipped with an external frame 7, and a control panel 701 is externally mounted on the external frame 7. The control panel 701 makes it more convenient to use the entire device, improving its practicality. The filter box 201 contains multiple sets of stabilizers 204, and the filter plate 203 is slidably connected to the inside of the stabilizers 204. The stabilizers 204 allow the filter plate 203 to slide within them during use, ensuring the filter plate 203 remains stable. 03. The stability of the filter box 201 is improved, enhancing the practicality of the device. Both the outer walls of the concentrate storage tank 501 and the clear liquid storage tank 502 are equipped with observation ports 503, and two sets of fixing rods 103 are installed above the coarse filter screen 101. By setting the observation ports 503, the internal liquid levels of the concentrate storage tank 501 and the clear liquid storage tank 502 can be observed in real time from the outside during use. The fixing rods 103 make it easier to remove the coarse filter screen 101 from the inside of the wastewater equalization tank 1, making it more convenient to use.

[0034] Working Principle: Wastewater is first introduced into wastewater equalization tank 1. After pH adjustment, the wastewater is then discharged into primary filter 2 for filtration. Subsequently, it enters ultrafiltration membrane module 3, where large organic molecules are retained. The permeate then enters reverse osmosis membrane module 4 for further concentration. The concentrate and clarified liquid are simultaneously discharged into concentrate storage tank 501 and clarified liquid storage tank 502. This multi-stage filtration effectively removes impurities from the wastewater, reducing membrane fouling, extending membrane lifespan, and improving wastewater treatment efficiency and continuity. It also lowers operating costs and achieves efficient recovery of useful components. The primary filter 2 allows for quick replacement of multiple filter plates 203 by opening and closing the side panel 202. It also allows for rapid cleaning after prolonged use, further ensuring filtration efficiency and improving operational stability.

[0035] The coarse filter 101 allows for preliminary filtration of wastewater entering the wastewater equalization tank 1, removing large particles and effectively reducing subsequent filtration pressure and improving stability during use. Furthermore, the multiple ultrafiltration membrane treatment tanks 301 and reverse osmosis membrane treatment tanks 401 further enhance membrane separation efficiency and improve separation performance, resulting in greater stability during operation.

[0036] Meanwhile, by setting up the control panel 701, it is more convenient to use the device as a whole, thus improving the device's practicality.

[0037] In addition, by setting up the conveyor motor 6, the efficiency of wastewater entering the ultrafiltration membrane module 3 and the reverse osmosis membrane module 4 can be improved during use, ensuring the stability of the overall filtration pressure. By setting up the stabilizer 204, the filter plate 203 can slide inside the stabilizer 204 during use, ensuring the stability of the filter plate 203 installed inside the filter box 201 and improving the practicality of the device. By setting up the observation port 503, the internal liquid level of the concentrate storage tank 501 and the clear liquid storage tank 502 can be observed in real time from the outside during use. The fixed rod 103 makes it easier to remove the coarse filter screen 101 from the inside of the wastewater equalization tank 1, making it more convenient to use.

[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A wastewater recovery device for hydroxypropyl methylcellulose production, comprising a wastewater equalization tank (1), characterized in that, A primary filter (2) is installed at the bottom of the wastewater equalization tank (1). An ultrafiltration membrane module (3) and a reverse osmosis membrane module (4) are installed on one side of the primary filter (2). The wastewater equalization tank (1), the primary filter (2), and the ultrafiltration membrane module (3) are all connected by pipes. The ultrafiltration membrane module (3) includes an ultrafiltration membrane treatment tank (301). The ultrafiltration membrane treatment tank (301) is connected to the primary filter (2) by pipes. A separation pipe (304) and a collection pipe (302) are installed on the outside of the ultrafiltration membrane treatment tank (301). The separation pipe (304) and the collection pipe (302) are both connected to the inside of the ultrafiltration membrane treatment tank (301). A pump motor (303) is provided at one end of the reverse osmosis membrane assembly (4), and an input pipe (305) is provided at the output end of the pump motor (303). The reverse osmosis membrane assembly (4) includes a reverse osmosis membrane treatment tank (401), which is connected to the input pipe (305). The bottom of the reverse osmosis membrane treatment tank (401) is provided with a concentrate outlet (402) and a clear liquid outlet (403). A collection assembly (5) is provided at one end of both the concentrate outlet (402) and the clear liquid outlet (403). The collection assembly (5) includes a concentrate storage tank (501) and a clear liquid storage tank (502) which are respectively connected to the concentrate outlet (402) and the clear liquid outlet (403).

2. The wastewater recovery device for hydroxypropyl methylcellulose production according to claim 1, characterized in that, The primary filter (2) includes a filter box (201), a side panel (202) is provided on one side of the filter box (201), and multiple sets of filter plates (203) are provided inside the filter box (201). One side of the multiple sets of filter plates (203) is fixedly connected to the side panel (202).

3. The wastewater recovery device for hydroxypropyl methylcellulose production according to claim 1, characterized in that, The wastewater regulating tank (1) is equipped with a coarse filter screen (101) located in the middle of the interior of the wastewater regulating tank (1), and a top cover (102) is provided on the top of the wastewater regulating tank (1).

4. The wastewater recovery device for hydroxypropyl methylcellulose production according to claim 1, characterized in that, The ultrafiltration membrane treatment tank (301) and the reverse osmosis membrane treatment tank (401) are both configured in multiple groups, and the multiple groups of the ultrafiltration membrane treatment tank (301) and the reverse osmosis membrane treatment tank (401) are all arranged in parallel.

5. The wastewater recovery device for hydroxypropyl methylcellulose production according to claim 1, characterized in that, The ultrafiltration membrane module (3) and the reverse osmosis membrane module (4) are provided with an external frame (7), and a control panel (701) is provided on the outside of the external frame (7).

6. The wastewater recovery device for hydroxypropyl methylcellulose production according to claim 5, characterized in that, A conveying motor (6) is provided between the primary filter (2) and the ultrafiltration membrane assembly (3), and the conveying motor (6) is electrically connected to the control panel (701).

7. The wastewater recovery device for hydroxypropyl methylcellulose production according to claim 2, characterized in that, The filter box (201) is provided with multiple sets of stabilizers (204) inside, and the filter plate (203) is slidably connected to the inside of the stabilizers (204).

8. The wastewater recovery device for hydroxypropyl methylcellulose production according to claim 3, characterized in that, Both the concentrated liquid storage tank (501) and the clear liquid storage tank (502) are provided with observation ports (503) on their outer walls, and two sets of fixing rods (103) are provided above the coarse filter screen (101).

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