A tail gas treatment device for benzoic acid production

Abstract

This utility model discloses a tail gas treatment device for benzoic acid production in the field of tail gas treatment technology. It includes a treatment housing with three support rods installed on its side wall. A filter structure is connected to one side of the treatment housing, and a backflushing cleaning structure is connected to the other side. The filter structure includes an inlet pipe, a connecting pipe, a filter housing, an exhaust pipe, a screen plate, a sealing plate, a rotating filter assembly, and two pressure strips. A motor drives the annular filter screen to rotate within an annular guide rail, ensuring even distribution of the filter screen surface load, preventing localized blockage, and significantly extending the filter screen's lifespan. A fan injects clean airflow into the treatment housing through the backflushing pipe, backflushing the rotating filter screen to remove adhering particles, achieving automatic cleaning without stopping the machine and ensuring continuous filtration efficiency. Simultaneously, the screen plate is installed on the side wall of the filter housing via pressure strips; loosening the bolts allows the sealing plate and screen plate to be pulled out, facilitating quick replacement or cleaning of the filter media.

Description

Technical Field

[0001] This utility model relates to the field of tail gas treatment technology, specifically a tail gas treatment device for benzoic acid production. Background Technology

[0002] The exhaust gas generated during benzoic acid production often contains dust particles, acidic gases, and volatile organic compounds. Traditional treatment devices mostly use fixed filter structures, and the sticky particles in the exhaust gas can easily clog the filter pores quickly, leading to a sharp drop in filtration efficiency. Frequent shutdowns are required to replace the filters, affecting production continuity. Furthermore, the disassembly of fixed filters is complex and poses a risk of secondary pollution, resulting in high maintenance costs. At the same time, the functional modules such as filtration, backflushing, and dust collection are relatively dispersed, resulting in a large equipment footprint, redundant airflow path design, and high energy consumption. Therefore, a new technical solution needs to be designed to address these issues. Utility Model Content

[0003] The purpose of this utility model is to provide a tail gas treatment device for benzoic acid production, in order to solve the problems mentioned in the background art. In the traditional treatment device, the fixed filter structure is often used. The sticky particles in the tail gas can easily clog the filter pores, resulting in a sharp drop in filtration efficiency. Frequent shutdowns are required to replace the filter, which affects the continuity of production. In addition, the fixed filter is complicated to disassemble and there is a risk of secondary pollution. The maintenance cost is high. At the same time, the functional modules such as filtration, backflushing and dust collection are distributed in a relatively dispersed position, the equipment occupies a large area, the airflow path design is redundant, and the energy consumption is high.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a tail gas treatment device for benzoic acid production, comprising a treatment shell, three support rods installed on the side wall of the treatment shell, a filter structure connected to one side of the treatment shell, and a backflushing cleaning structure connected to the other side of the treatment shell;

[0005] The filter structure includes: an intake pipe, a connecting pipe, a filter housing, an exhaust pipe, a mesh plate, a sealing plate, a rotating filter assembly, and two pressure strips;

[0006] One end of the air intake pipe is connected to one side of the lower wall of the processing housing, one end of the connecting pipe is connected to one side of the upper wall of the processing housing, the bottom end of the filter housing is connected to the top end of the connecting pipe, the exhaust pipe is connected to the top end of the filter housing, the mesh plate is movably embedded in the side wall of the filter housing, the sealing plate is located on one side of the filter housing and is fixedly connected to the side wall of the mesh plate, both pressure strips are located outside the sealing plate, the rotating filter assembly is fixedly installed on the top end of the processing housing and its bottom end is movably embedded in the processing housing.

[0007] As a preferred embodiment of the tail gas treatment device for benzoic acid production according to this utility model, the rotating filter assembly includes: a motor, an operating shaft, two annular guide rails, an annular frame, and an annular filter screen.

[0008] The motor is fixedly installed at the top of the processing housing. One end of the operating shaft is connected to the motor drive end, and the other end is movably inserted through the upper wall of the processing housing via a bearing. The two annular guide rails are respectively installed at the upper and lower ends of the processing housing. The center of the annular frame is fixedly connected to the operating shaft and movably embedded in the two annular guide rails. The annular filter screen is fixedly embedded in the annular frame.

[0009] As a preferred embodiment of the tail gas treatment device for benzoic acid production according to this utility model, the backflush cleaning structure includes: a collection shell, a collection pipe, a backflush pipe, and a blower;

[0010] The collection housing is installed on the lower wall of the processing housing. The top end of the collection pipe is connected to the lower end of the collection housing. The bottom end of the backflush pipe is connected to one side of the upper end of the processing housing. The fan is installed on the side wall of the filter housing, and its outlet end is connected to the top end of the backflush pipe.

[0011] As a preferred embodiment of the tail gas treatment device for benzoic acid production according to this utility model, two support plates are installed at the connection position between the filter housing and the treatment housing.

[0012] As a preferred embodiment of the tail gas treatment device for benzoic acid production according to this utility model, a fixing frame is installed between the fan and the filter housing.

[0013] As a preferred embodiment of the tail gas treatment device for benzoic acid production according to this utility model, a connecting frame is installed between the motor and the connecting pipe.

[0014] As a preferred embodiment of the tail gas treatment device for benzoic acid production according to this utility model, the two pressure bars are respectively movably connected to both sides of the filter housing by bolts.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the tail gas treatment device for benzoic acid production has a reasonable structural design;

[0016] The annular filter screen is driven by a motor to rotate within the annular guide rail, ensuring even distribution of load on the filter screen surface, preventing localized clogging, and significantly extending the filter screen's lifespan. A fan injects clean airflow into the treatment housing via a backflush pipe, backflushing the rotating filter screen to remove adhering particles, achieving automatic cleaning without stopping the machine and ensuring continuous filtration efficiency. Simultaneously, the screen plate is installed on the side wall of the filter housing via pressure strips; loosening the bolts allows for the removal of the sealing plate along with the screen plate, facilitating quick replacement or cleaning of the filter media. The exhaust gas enters the treatment housing through the inlet pipe, where the rotating annular filter screen first intercepts large particles. Then, the airflow passes through the connecting pipe into the filter housing for secondary filtration, finally exiting through the exhaust pipe, achieving dual filtration of the exhaust gas and effectively removing dust. Attached Figure Description

[0017] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a rear-view three-dimensional structural diagram of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the present invention viewed from below;

[0020] Figure 4 This is a side sectional view of the present invention.

[0021] In the diagram: 1. Processing housing, 2. Support rod, 3. Inlet pipe, 4. Connecting pipe, 5. Filter housing, 6. Exhaust pipe, 7. Mesh plate, 8. Sealing plate, 9. Pressure strip, 10. Motor, 11. Operating shaft, 12. Circular guide rail, 13. Circular frame, 14. Circular filter screen, 15. Collection housing, 16. Collection pipe, 17. Backflush pipe, 18. Fan, 19. Support plate, 20. Fixing frame, 21. Connecting frame. 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.

[0023] Please see Figure 1-4 This utility model provides a technical solution:

[0024] In this technical solution, a tail gas treatment device for benzoic acid production includes a treatment shell 1, three support rods 2 installed on the side wall of the treatment shell 1, a filter structure connected to one side of the treatment shell 1, and a backflushing cleaning structure connected to the other side of the treatment shell 1.

[0025] The filter structure includes: an intake pipe 3, a connecting pipe 4, a filter housing 5, an exhaust pipe 6, a mesh plate 7, a sealing plate 8, a rotating filter assembly, and two pressure strips 9.

[0026] One end of the intake pipe 3 is connected to one side of the lower wall of the treatment housing 1, one end of the connecting pipe 4 is connected to one side of the upper wall of the treatment housing 1, the bottom end of the filter housing 5 is connected to the top end of the connecting pipe 4, the exhaust pipe 6 is connected to the top end of the filter housing 5, the mesh plate 7 is movably embedded in the side wall of the filter housing 5, the sealing plate 8 is located on one side of the filter housing 5 and is fixedly connected to the side wall of the mesh plate 7, the two pressure strips 9 are both located outside the sealing plate 8, the rotating filter assembly is fixedly installed on the top end of the treatment housing 1 and the bottom end is movably embedded in the treatment housing 1.

[0027] In this technical solution, when treating the dust in the benzoic acid tail gas, the operator first moves the device to a designated location and supports it using three support rods 2. Then, the operator connects the inlet pipe 3 to the exhaust pipe 6 of the benzoic acid production equipment. The exhaust pipe 6 is then connected to a hazardous gas treatment device. When filtering the dust in the tail gas, the tail gas is transported to the treatment housing 1 through the inlet pipe 3. The rotating filter assembly inside the treatment housing 1 performs preliminary filtration of the tail gas. The pre-filtered tail gas then enters the filter housing 5 through the connecting pipe 4. The exhaust gas is further processed by the mesh plate 7 inside the filter housing 5, performing double filtration to remove dust. Finally, the treated exhaust gas is transported to the hazardous gas treatment equipment through the exhaust pipe 6. The hazardous gas treatment equipment further processes the dust-filtered exhaust gas. The back-flushing cleaning structure allows for back-flushing cleaning of the dust adsorbed in the rotating filter assembly, enabling unified dust collection. Furthermore, the sealing plate 8 and mesh plate 7 can be disassembled by removing the pressure strip 9, allowing for cleaning and replacement of the mesh plate 7, ensuring the dust treatment effect of the exhaust gas.

[0028] In some technical solutions, reference Figure 1 The rotating filter assembly includes: a motor 10, an operating shaft 11, two annular guide rails 12, an annular frame 13, and an annular filter screen 14.

[0029] The motor 10 is fixedly installed at the top of the processing housing 1. One end of the operating shaft 11 is connected to the driving end of the motor 10, and the other end is movably inserted through the upper wall of the processing housing 1 via a bearing. Two annular guide rails 12 are respectively installed at the upper and lower ends of the processing housing 1. The center of the annular frame 13 is fixedly connected to the operating shaft 11 and is movably embedded in the two annular guide rails 12. The annular filter screen 14 is fixedly embedded in the annular frame 13.

[0030] In this technical solution, when the dust in the exhaust gas is initially filtered, the exhaust gas is filtered by the annular filter screen 14 inside the annular frame 13. As the motor 10 is working, it drives the operating shaft 11 and the annular frame 13 to rotate slowly. In conjunction with the back-flushing cleaning structure, the annular filter screen 14 can be back-flushed and cleaned to ensure the continuous filtration effect of the exhaust gas. The rotational stability of the annular frame 13 can be ensured by the two annular guide rails 12.

[0031] In some technical solutions, reference Figure 1 The backflush cleaning structure includes: a collection housing 15, a collection pipe 16, a backflush pipe 17, and a blower 18;

[0032] The collection housing 15 is installed on the lower wall of the treatment housing 1. The top end of the collection pipe 16 is connected to the lower end of the collection housing 15. The bottom end of the backflush pipe 17 is connected to one side of the upper end of the treatment housing 1. The fan 18 is installed on the side wall of the filter housing 5, and its outlet end is connected to the top end of the backflush pipe 17.

[0033] In this technical solution, during the initial filtration of exhaust gas, the staff drives the fan 18 to pressurize and transport the outside gas to the backflush pipe 17. The gas is then transported to the treatment housing 1 through the backflush pipe 17 to backflush the annular filter 14. The blown-off dust is transported to the collection pipe 16 through the collection housing 15. The dust is then transported to a designated location through the collection pipe 16 for unified collection.

[0034] In some technical solutions, reference Figure 1 Two support plates 19 are installed at the connection position between the filter housing 5 and the treatment housing 1 to reinforce the connection between the filter housing 5 and the treatment housing 1. A fixing frame 20 is installed between the fan 18 and the filter housing 5 to ensure the stability of the fan 18. A connecting frame 21 is installed between the motor 10 and the connecting pipe 4 to fix the motor 10 and the connecting pipe 4, thereby improving the overall rigidity of the equipment and reducing vibration damage. The two pressure strips 9 are movably connected to both sides of the filter housing 5 by bolts. The sealing plate 8 and the mesh plate 7 can be pulled out by loosening the bolts, which is convenient for quick replacement or cleaning of the filter media.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tail gas treatment device for benzoic acid production, comprising a treatment shell (1), characterized in that, Three support rods (2) are installed on the side wall of the processing housing (1). A filter structure is connected to one side of the processing housing (1), and a backflushing cleaning structure is connected to the other side of the processing housing (1). The filter structure includes: an air inlet pipe (3), a connecting pipe (4), a filter housing (5), an exhaust pipe (6), a mesh plate (7), a sealing plate (8), a rotating filter assembly, and two pressure strips (9); One end of the air intake pipe (3) is connected to one side of the lower wall of the processing housing (1), one end of the connecting pipe (4) is connected to one side of the upper wall of the processing housing (1), the bottom end of the filter housing (5) is connected to the top end of the connecting pipe (4), the exhaust pipe (6) is connected to the top end of the filter housing (5), the mesh plate (7) is movably embedded in the side wall of the filter housing (5), the sealing plate (8) is located on one side of the filter housing (5) and is fixedly connected to the side wall of the mesh plate (7), the two pressure strips (9) are located outside the sealing plate (8), the rotating filter assembly is fixedly installed on the top end of the processing housing (1) and its bottom end is movably embedded in the processing housing (1).

2. The tail gas treatment device for benzoic acid production according to claim 1, characterized in that, The rotating filter assembly includes: a motor (10), an operating shaft (11), two annular guide rails (12), an annular frame (13), and an annular filter screen (14). The motor (10) is fixedly installed at the top of the processing housing (1). One end of the operating shaft (11) is connected to the driving end of the motor (10), and the other end is movably inserted through the upper wall of the processing housing (1) via a bearing. The two annular guide rails (12) are respectively installed at the upper and lower ends of the processing housing (1). The center of the annular frame (13) is fixedly connected to the operating shaft (11) and movably embedded in the two annular guide rails (12). The annular filter screen (14) is fixedly embedded in the annular frame (13).

3. The tail gas treatment device for benzoic acid production according to claim 1, characterized in that, The backflush cleaning structure includes: a collection housing (15), a collection pipe (16), a backflush pipe (17), and a blower (18). The collection housing (15) is installed on the lower wall of the processing housing (1), the top end of the collection pipe (16) is connected to the lower end of the collection housing (15), the bottom end of the backflush pipe (17) is connected to one side of the upper end of the processing housing (1), the fan (18) is installed on the side wall of the filter housing (5), and the air outlet is connected to the top end of the backflush pipe (17).

4. The tail gas treatment device for benzoic acid production according to claim 1, characterized in that, Two support plates (19) are installed at the connection position between the filter housing (5) and the processing housing (1).

5. The tail gas treatment device for benzoic acid production according to claim 3, characterized in that, A fixing frame (20) is installed between the fan (18) and the filter housing (5).

6. The tail gas treatment device for benzoic acid production according to claim 2, characterized in that, A connecting bracket (21) is installed between the motor (10) and the connecting pipe (4).

7. The tail gas treatment device for benzoic acid production according to claim 1, characterized in that, The two pressure strips (9) are movably connected to both sides of the filter housing (5) by bolts at both ends.

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