Low-temperature wet catalytic oxidation unit for COD removal from divalent brine using nanofiltration

Abstract

This utility model discloses a low-temperature wet catalytic oxidation device for COD removal from nanofiltration divalent brine, relating to the field of brine treatment technology, including a placement plate. In this utility model, when treating brine using the low-temperature wet catalytic oxidation device, to improve the multi-functional conversion and utilization of the emitted waste gas, the solenoid valve on the outer wall of the return pipe is opened, allowing the waste gas to enter the return pipe and pass through a drying box for drying and purification. Under the action of an electric heating wire, the hot gas is transported through a distribution pipe to the catalytic device for preheating. The gas is then transported to a gas collection device via a connecting pipe for gas recovery and utilization. Depending on the usage path of the connecting pipe and the return pipe, a servo motor is activated, and through the rotation of a bevel gear set, it drives a sealing plate fixedly connected to the connecting shaft to rotate, achieving convenient switching between usage paths.

Description

Technical Field

[0001] This utility model relates to the field of concentrated brine treatment technology, specifically a low-temperature wet catalytic oxidation device for removing COD from nanofiltration divalent concentrated brine. Background Technology

[0002] The wet catalytic oxidation reaction tower is partially filled with specially designed solid composite packing as the reaction contact matrix. The packing contains a multi-media catalyst. When VOCs odor gases pass through the packing layer under the action of the induced draft fan, they come into full contact with the liquid-phase composite oxidant sprayed in a diffuse mist through a special nozzle on the surface of the solid packing. Under the catalytic action of the multi-media catalyst, the pollutants in the VOCs odor gases are fully decomposed, thereby achieving the purpose of removing and eliminating odors. In the production and processing of nanofiltration divalent brine, it is also necessary to use a wet catalytic oxidation device to remove COD from the divalent brine.

[0003] However, while existing wet catalytic oxidation devices can effectively remove COD, they are not very efficient at recycling and utilizing the waste gas generated during operation, and they are also not very effective at preheating and storing the heat carried in the waste gas within the catalytic device. This reduces the COD removal efficiency of the catalytic device and the resource utilization rate of the catalytic device.

[0004] Therefore, in view of this, we have studied and improved the existing structure to address its shortcomings, and proposed a low-temperature wet catalytic oxidation device for COD removal from nanofiltration divalent brine. Utility Model Content

[0005] The purpose of this invention is to provide a low-temperature wet catalytic oxidation device for COD removal from nanofiltration divalent brine, in order to solve the problems mentioned in the background art, such as the low efficiency of multi-functional recovery and utilization of waste gas and the low efficiency of preheating and storing the heat carried in the waste gas in the catalytic device.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature wet catalytic oxidation device for COD removal from divalent brine using nanofiltration, comprising a placement plate, a gas collecting device on the outer wall of the placement plate, a catalytic device on one side of the gas collecting device, a demister body on one side of the catalytic device, an exhaust pipe on the top of the demister body, a return pipe on the outer wall of the exhaust pipe, a drying box fixedly connected to one end of the return pipe, a conveying pipe fixedly connected to the outer wall of the drying box, a diversion pipe fixedly connected to the outer wall of the conveying pipe and fixedly connected to the outer wall of the catalytic device, a circulating dosing device on the outer wall of the placement plate, a control box on the outer wall of the placement plate, a servo motor on the outer wall of the control box, a bevel gear set fixedly connected to the output end of the servo motor, a connecting shaft fixedly connected to the outer wall of the bevel gear set, and a sealing plate rotatably connected to the inner wall of the conveying pipe fixedly connected to one end of the connecting shaft.

[0007] Furthermore, the top of the drying box is provided with an electric heating wire, the inner wall of the drying box is provided with a conveying hole located on one side of the electric heating wire, and the interior of the drying box is provided with desiccant balls.

[0008] Furthermore, both the exhaust pipe and the return pipe are equipped with solenoid valves on their outer walls.

[0009] Furthermore, two sets of sealing plates and connecting shafts are provided, and the rotation directions of the two sets of sealing plates and connecting shafts are opposite.

[0010] Furthermore, the diversion pipe is connected to the catalytic device, and the delivery pipe is connected to the gas collection device.

[0011] Furthermore, the outer wall profile of the conveying hole is grid-shaped.

[0012] Furthermore, the outer wall of the drying box is provided with a sealing door panel.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, when treating concentrated brine using a low-temperature wet catalytic oxidation device, to improve the multi-functional conversion and utilization of the emitted waste gas, the solenoid valve on the outer wall of the return pipe is opened, allowing the waste gas to enter the return pipe and pass through a drying box for drying and purification. Under the action of an electric heating wire, the hot gas is transported through a distribution pipe to the catalytic device for preheating. The gas is then transported to a gas collection device via a connecting pipe for recycling. Depending on the usage path of the connecting pipe and the return pipe, the servo motor is activated, and the rotation of the bevel gear set drives the sealing plate fixedly connected to the connecting shaft to rotate, achieving a convenient switching effect for different usage paths. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the catalytic device of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the catalytic device of this utility model from another direction;

[0017] Figure 3 This is a schematic diagram of the connection structure between the bevel gear set and the connecting shaft of this utility model;

[0018] Figure 4 This is a schematic diagram of the electric heating wire and drying ball of this utility model;

[0019] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0020] In the picture:

[0021] 1. Placement plate; 2. Gas collection device; 3. Catalytic converter; 4. Demister body; 5. Exhaust pipe; 6. Return pipe; 7. Drying box; 8. Circulating dosing device; 9. Diverter pipe; 10. Delivery pipe; 11. Control box; 12. Servo motor; 13. Bevel gear set; 14. Connecting shaft; 15. Sealing plate; 16. Electric heating wire; 17. Delivery hole; 18. Drying ball. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0023] like Figures 1-5As shown, a low-temperature wet catalytic oxidation device for COD removal from divalent brine using nanofiltration includes a placement plate 1. A gas collection device 2 is installed on the outer wall of the placement plate 1. A catalytic device 3 is installed on one side of the gas collection device 2. A demister body 4 is installed on one side of the catalytic device 3. An exhaust pipe 5 is installed on the top of the demister body 4. A return pipe 6 is installed on the outer wall of the exhaust pipe 5. A drying box 7 is fixedly connected to one end of the return pipe 6. A conveying pipe 10 is fixedly connected to the outer wall of the drying box 7. A diversion pipe 9, which is fixedly connected to the outer wall of the catalytic device 3, is fixedly connected to the outer wall of the conveying pipe 10. A circulating dosing device 8 is installed on the outer wall of the placement plate 1. A control box 11 is installed on the outer wall of the placement plate 1. A servo motor 12 is installed on the outer wall of the control box 11. A bevel gear set 13 is fixedly connected to the output end of the servo motor 12. A connecting shaft 14 is fixedly connected to the outer wall of the bevel gear set 13. A sealing plate 15, which is rotatably connected to the inner wall of the conveying pipe 10, is fixedly connected to one end of the connecting shaft 14.

[0024] like Figure 4 As shown, an electric heating wire 16 is provided on the top of the drying box 7, and a conveying hole 17 is provided on the inner wall of the drying box 7 on one side of the electric heating wire 16. A drying ball 18 is provided inside the drying box 7, which is beneficial to achieve the effect of drying and purifying the recovered waste gas through the setting of the drying ball 18.

[0025] like Figure 1 As shown, solenoid valves are installed on the outer walls of both the exhaust pipe 5 and the return pipe 6, which facilitates convenient switching of the exhaust gas delivery path.

[0026] like Figure 3 As shown, there are two sets of sealing plates 15 and connecting shafts 14. The rotation directions of the two sets of sealing plates 15 and connecting shafts 14 are opposite. This is beneficial to achieve the effect of changing the transport path of the purified waste gas by setting two sets of sealing plates 15 and connecting shafts 14 with opposite rotation directions.

[0027] like Figure 1 and Figure 2 As shown, the diversion pipe 9 is connected to the catalytic device 3, and the delivery pipe 10 is connected to the gas collection device 2. This connection between the diversion pipe 9 and the catalytic device 3 facilitates the preheating of the gas.

[0028] like Figure 4 As shown, the outer wall contour of the conveying hole 17 is grid-shaped, which facilitates the convenient delivery of heat generated by the electric heating wire 16 through the grid-shaped outer wall contour of the conveying hole 17.

[0029] like Figure 2As shown, the outer wall of the drying box 7 is provided with a sealing door, which facilitates the convenient replacement of the desiccant 18.

[0030] Working principle: When using the low-temperature wet catalytic oxidation device for COD removal from divalent brine using nanofiltration, in order to improve the multi-functional conversion and utilization of the emitted waste gas, the solenoid valve on the outer wall of the return pipe 6 is opened, allowing the waste gas to enter the return pipe 6 and pass through the drying box 7 for drying and purification. Under the action of the electric heating wire 16, the hot gas is transported to the catalytic device 3 through the diversion pipe 9 for preheating. The gas is then transported to the gas collection device 2 through the connection of the conveying pipe 10 for gas recovery and utilization. According to the usage path requirements of the conveying pipe 10 and the return pipe 6, the servo motor 12 is turned on, and the rotation of the bevel gear set 13 drives the sealing plate 15, which is fixedly connected to the connecting shaft 14, to rotate, achieving the effect of convenient switching of usage paths.

[0031] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A low-temperature wet catalytic oxidation device for removing COD from divalent brine using nanofiltration, comprising a placement plate (1), characterized in that, A gas collecting device (2) is provided on the outer wall of the placement plate (1). A catalytic device (3) is provided on one side of the gas collecting device (2). A demister body (4) is provided on one side of the catalytic device (3). An exhaust pipe (5) is provided on the top of the demister body (4). A return pipe (6) is provided on the outer wall of the exhaust pipe (5). A drying box (7) is fixedly connected to one end of the return pipe (6). A conveying pipe (10) is fixedly connected to the outer wall of the drying box (7). A connection to the catalytic device (10) is fixedly connected to the outer wall of the conveying pipe (10). 3) A diversion pipe (9) is fixedly connected to the outer wall. A circulating dosing device (8) is provided on the outer wall of the placement plate (1). A control box (11) is provided on the outer wall of the placement plate (1). A servo motor (12) is provided on the outer wall of the control box (11). A bevel gear set (13) is fixedly connected to the output end of the servo motor (12). A connecting shaft (14) is fixedly connected to the outer wall of the bevel gear set (13). A sealing plate (15) is fixedly connected to one end of the connecting shaft (14) and rotatedly connected to the inner wall of the delivery pipe (10).

2. The low temperature wet catalytic oxidation device for removing COD from nanofiltration divalent concentrated brine according to claim 1, characterized in that, The top of the drying box (7) is provided with an electric heating wire (16), the inner wall of the drying box (7) is provided with a conveying hole (17) located on one side of the electric heating wire (16), and the inside of the drying box (7) is provided with a drying ball agent (18).

3. The low temperature wet catalytic oxidation device for removing COD from nanofiltration divalent concentrated brine according to claim 1, characterized in that, Solenoid valves are provided on the outer walls of both the exhaust pipe (5) and the return pipe (6).

4. The low-temperature wet catalytic oxidation device for COD removal from divalent brine by nanofiltration according to claim 1, characterized in that, The sealing plate (15) and the connecting shaft (14) are each provided in two sets, and the rotation directions of the two sets of sealing plates (15) and connecting shafts (14) are opposite.

5. The low-temperature wet catalytic oxidation device for COD removal from divalent brine by nanofiltration according to claim 1, characterized in that, The diversion pipe (9) is connected to the catalytic device (3), and the delivery pipe (10) is connected to the gas collection device (2).

6. The low temperature wet catalytic oxidation device for removing COD from nanofiltration divalent concentrated brine according to claim 2, characterized in that, The outer wall of the conveying hole (17) has a grid-like outline.

7. The low temperature wet catalytic oxidation device for removing COD from nanofiltration divalent concentrated brine according to claim 2, characterized in that, The outer wall of the drying box (7) is provided with a sealing door panel.

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