A composite exhaust gas purification device

Abstract

The application discloses a composite waste gas purification device, belongs to the technical field of PTA production, and comprises a pretreatment tank. A filtering mechanism is arranged in the pretreatment tank. A heating mechanism is arranged on the side wall of the pretreatment tank. A purification tank is arranged on one side of the pretreatment tank. A sprayer is arranged on the purification tank. An exhaust pipe is arranged on the side wall of the purification tank. The filtering mechanism and the heating mechanism are arranged, so that the problem that the common spray tower usually adopts a normal-temperature absorption mode, the waste gas is not pretreated, the diffusion coefficient of acetic acid and other substances is low at normal temperature, the gas-liquid mass transfer efficiency is poor, and the acetic acid absorption rate is usually lower than 70% is effectively solved, the waste gas is pretreated, solid impurities are removed, and the waste gas is heated.

Description

Technical Field

[0001] This application relates to the field of PTA production technology, and more specifically, to a composite waste gas purification device. Background Technology

[0002] Purified terephthalic acid (PTA) is a core raw material in the polyester industry. Its production process requires multiple steps such as oxidation and refining. During this process, complex waste gas is generated, which mainly contains the following types of pollutants: dust and acidic and soluble organic matter.

[0003] In related technologies, for example, the prior art patent with publication number CN208727123U provides a waste gas treatment and purification device, which is equipped with an air inlet pipe. One end of the air inlet pipe is fixedly connected to a purification box. A drive motor is fixedly installed at the top middle position of the purification box. A rotating column is connected to the output shaft of the drive motor. The lower end of the rotating column extends into the interior of the purification box. The above-mentioned structure is simple, reasonable in design, easy to operate, and suitable for promotion.

[0004] Although the existing technical solutions mentioned above have solved the problems in the background technology, the spray towers commonly used in the existing technology mostly adopt the room temperature absorption method and do not pre-treat the waste gas. Since substances such as acetic acid have a low diffusion coefficient at room temperature and poor gas-liquid mass transfer efficiency, the acetic acid absorption rate is usually less than 70%.

[0005] In view of this, we propose a composite waste gas purification device. Utility Model Content

[0006] The purpose of this application is to provide a composite waste gas purification device that can effectively solve the problem that in the prior art, the commonly used spray towers mostly adopt the room temperature absorption method without pre-treatment of waste gas. Due to the low diffusion coefficient of substances such as acetic acid at room temperature and the poor gas-liquid mass transfer efficiency, the absorption rate of acetic acid is usually less than 70%. This application achieves the effect of pre-treating waste gas, removing solid impurities, and heating the waste gas at the same time.

[0007] This application provides a composite waste gas purification device, comprising a pretreatment tank; a filtration mechanism is provided inside the pretreatment tank; a heating mechanism is provided on the side wall of the pretreatment tank; a purification tank is provided on one side of the pretreatment tank; a sprayer is provided on the purification tank; and an exhaust pipe is provided on the side wall of the purification tank.

[0008] As an optional solution to the technical solution of this application, the filtration mechanism includes a rotating cavity; one end of the rotating cavity extends to the outside of the pretreatment tank; the rotating cavity and the pretreatment tank are rotatably connected by a bearing; a conveying pipe is connected to the upper end of the rotating cavity; the conveying pipe extends to the outside of the pretreatment tank; filter holes are formed on the side wall of the rotating cavity; the number of filter holes is several and evenly arranged; a first gear is fixedly installed on the conveying pipe; a second gear meshes with the first gear; a motor is installed on the second gear; a rotary joint is installed at the top end of the conveying pipe; and a sealing cap is threadedly connected to the lower end of the rotating cavity.

[0009] As an optional solution to the technical solution of this application, the heating mechanism includes an installation cavity; the installation cavity is opened in the side wall of the pretreatment tank; and an electric heating wire is fixedly installed in the installation cavity.

[0010] As an optional solution to the technical solution of this application, a connecting pipe is provided between the pretreatment tank and the purification tank; both ends of the connecting pipe are respectively connected through the pretreatment tank and the purification tank; an exhaust pump is provided on the connecting pipe.

[0011] As an optional solution to the technical solution of this application, a controller is fixedly installed on the pretreatment tank; the controller is electrically connected to the electric heating wire.

[0012] As an optional solution to the technical solution of this application, the motor surface is provided with a mounting base; the mounting base is fixedly disposed with the pretreatment tank.

[0013] As an optional solution to the technical solution of this application, the lower surfaces of the pretreatment tank and the purification tank are fixedly provided with support columns; the number of support columns is three and they are arranged in a circle; the support columns on the pretreatment tank and the support columns on the purification tank are set at the same height.

[0014] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0015] This application effectively solves the problem that commonly used spray towers mostly use room temperature absorption methods without pre-treating the waste gas. Due to the low diffusion coefficient of substances such as acetic acid at room temperature and poor gas-liquid mass transfer efficiency, the absorption rate of acetic acid is usually less than 70%. This application achieves the effect of pre-treating the waste gas, removing solid impurities, and heating the waste gas at the same time.

[0016] This application utilizes a filtration mechanism to filter solid impurities in exhaust gas through centrifugal force, leaving the solid impurities in the rotating chamber, thus achieving pretreatment of the exhaust gas.

[0017] This application uses a heating mechanism to heat the filtered gas, bringing the exhaust gas to a suitable temperature for subsequent purification. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a composite waste gas purification device disclosed in a preferred embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the connecting pipe and exhaust pump of a composite waste gas purification device disclosed in a preferred embodiment of this application;

[0020] Figure 3 This is an overall cross-sectional view of a composite waste gas purification device disclosed in a preferred embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the purification tank, sprayer, and exhaust pipe of a composite waste gas purification device disclosed in a preferred embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the first gear, second gear, and motor structure of a composite exhaust gas purification device disclosed in a preferred embodiment of this application;

[0023] The following are the labels in the diagram: 1. Pretreatment tank; 2. Purification tank; 3. Sprayer; 4. Exhaust pipe; 5. Rotating cavity; 6. Conveying pipe; 7. Filter hole; 8. First gear; 9. Second gear; 10. Motor; 11. Rotary joint; 12. Sealing cover; 13. Mounting cavity; 14. Electric heating wire; 15. Connecting pipe; 16. Exhaust pump; 17. Controller; 18. Mounting base; 19. Support column. Detailed Implementation

[0024] The present application will be further described in detail below with reference to the accompanying drawings.

[0025] Reference Figures 1 to 5 This application discloses a composite waste gas purification device, including a pretreatment tank 1; a filter mechanism is provided inside the pretreatment tank 1; a heating mechanism is provided on the side wall of the pretreatment tank 1; a purification tank 2 is provided on one side of the pretreatment tank 1; a sprayer 3 is provided on the purification tank 2; and an exhaust pipe 4 is provided on the side wall of the purification tank 2.

[0026] By setting up a pretreatment tank 1, a filtration mechanism, a heating mechanism, a purification tank 2, a sprayer 3, and an exhaust pipe 4, in use, the filtration mechanism and the heating mechanism are first set inside the pretreatment tank 1. The filtration mechanism can filter solid impurities in the waste gas through centrifugal action, leaving the solid impurities in the rotating cavity 5, thus achieving pretreatment of the waste gas. The heating mechanism can heat the filtered gas to bring the waste gas to a suitable temperature for subsequent purification treatment. After the waste gas is pretreated, it is transported to the purification tank 2, where sodium hydroxide solution is sprayed through the sprayer 3 to remove impurities from the waste gas. Finally, the purified waste gas is discharged through the exhaust pipe 4.

[0027] Reference Figure 3 and Figure 5 The filtration mechanism includes a rotating cavity 5; one end of the rotating cavity 5 extends to the outside of the pretreatment tank 1; the rotating cavity 5 and the pretreatment tank 1 are rotatably connected by bearings; a conveying pipe 6 is connected to the upper end of the rotating cavity 5; the conveying pipe 6 extends to the outside of the pretreatment tank 1; filter holes 7 are opened on the side wall of the rotating cavity 5; the number of filter holes 7 is several and evenly arranged; a first gear 8 is fixedly installed on the conveying pipe 6; a second gear 9 meshes on the first gear 8; a motor 10 is installed on the second gear 9; a rotary joint 11 is installed at the top end of the conveying pipe 6; and a sealing cap 12 is threadedly connected to the lower end of the rotating cavity 5.

[0028] By configuring a rotating cavity 5, a conveying pipe 6, a filter hole 7, a first gear 8, a second gear 9, a motor 10, a rotary joint 11, and a sealing cover 12, in use, waste gas is first conveyed into the rotating cavity 5 through the conveying pipe 6. Then, the motor 10 is turned on, causing the rotating shaft of the motor 10 to drive the second gear 9 to rotate. Since the second gear 9 is meshed with the first gear 8, it can drive the first gear 8 and the conveying pipe 6 to rotate. Since there is a rotary joint 11 on the conveying pipe 6, the rotation of the external waste gas conveying pipe is prevented. Then, the rotating cavity 5 is driven to rotate. Through centrifugal action, the waste gas is discharged into the pretreatment tank 1. The filter hole 7 on the rotating cavity 5 can leave solid impurities inside the rotating cavity 5. Then, the sealing cover 12 is threadedly connected to the rotating cavity 5. The sealing cover 12 can be disassembled to discharge the solid impurities inside the rotating cavity 5.

[0029] Reference Figure 3 The heating mechanism includes a mounting cavity 13; the mounting cavity 13 is opened on the side wall of the pretreatment tank 1; an electric heating wire 14 is fixedly installed in the mounting cavity 13.

[0030] By setting up the mounting cavity 13 and the electric heating wire 14, the mounting cavity 13 can install and fix the electric heating wire 14 during use. Then, the electric heating wire 14 can heat the inside of the pretreatment tank 1, thereby heating the waste gas, increasing the diffusion coefficient of acetic acid, reducing the mass transfer resistance of acetic acid, and improving its absorption rate.

[0031] Reference Figure 2 A connecting pipe 15 is provided between the pretreatment tank 1 and the purification tank 2; both ends of the connecting pipe 15 are respectively connected through the pretreatment tank 1 and the purification tank 2; an exhaust pump 16 is provided on the connecting pipe 15.

[0032] By setting up a connecting pipe 15 and an exhaust pump 16, the connecting pipe 15 can connect the pretreatment tank 1 and the purification tank 2 during use, and then the exhaust pump 16 can transport the exhaust gas inside the pretreatment tank 1 to the purification tank 2 for purification.

[0033] Reference Figure 1 A controller 17 is fixedly installed on the pretreatment tank 1; the controller 17 is electrically connected to the electric heating wire 14.

[0034] By setting the controller 17, during use, the controller 17 can control the electric heating wire 14, and then change the temperature inside the pretreatment tank 1 by controlling the voltage flowing through the electric heating wire 14.

[0035] Reference Figure 5 The motor 10 has a mounting base 18 on its surface; the mounting base 18 is fixedly mounted to the pretreatment tank 1.

[0036] By setting the mounting base 18, the mounting base 18 is fixedly set on the pretreatment during use, and the motor 10 can be installed through the mounting base 18, thereby improving the stability of the motor 10's operation.

[0037] Reference Figure 1 Support columns 19 are fixedly installed on the lower surfaces of pretreatment tank 1 and purification tank 2; there are three support columns 19 arranged in a circle; the support columns 19 on pretreatment tank 1 and the support columns 19 on purification tank 2 are set at the same height.

[0038] By setting up support columns 19, the support columns 19 can provide support for the pretreatment tank 1 and the purification tank 2 during use, thereby improving the stability of the pretreatment tank 1 and the purification tank 2.

[0039] In summary, the composite waste gas purification device disclosed in this application, when in use, firstly, waste gas is conveyed into the rotating cavity 5 through the conveying pipe 6. Then, the motor 10 is turned on, causing the rotating shaft of the motor 10 to drive the second gear 9 to rotate. Since the second gear 9 is meshed with the first gear 8, it can drive the first gear 8 and the conveying pipe 6 to rotate. Because the conveying pipe 6 has a rotary joint 11, it can prevent the external waste gas conveying pipe from rotating. Then, the rotating cavity 5 is driven to rotate, and through centrifugal force, the waste gas is discharged into the pretreatment tank 1. The filter holes 7 on the rotating cavity 5 can retain solid impurities inside the rotating cavity 5. Then, the sealing cover 12 is threadedly connected to the rotating cavity 5, and the sealing cover 12 can be disassembled to discharge the solid impurities inside the rotating cavity 5. The mounting cavity 13 can... The electric heating wire 14 is installed and fixed, and then the electric heating wire 14 can heat the inside of the pretreatment tank 1, thereby heating the waste gas, increasing the diffusion coefficient of acetic acid, reducing the mass transfer resistance of acetic acid, and improving its absorption rate. The connecting pipe 15 can connect the pretreatment tank 1 and the purification tank 2. Then the exhaust pump 16 can transport the waste gas inside the pretreatment tank 1 to the purification tank 2 for purification. The controller 17 can control the electric heating wire 14, and then change the temperature inside the pretreatment tank 1 by controlling the voltage flowing through the electric heating wire 14. The mounting base 18 is fixedly set on the pretreatment tank, and the motor 10 can be installed through the mounting base 18 to improve the stability of the motor 10. Finally, the support column 19 can provide support for the pretreatment tank 1 and the purification tank 2, improving the stability of the pretreatment tank 1 and the purification tank 2.

Claims

1. A composite waste gas purification device, characterized in that, It includes a pretreatment tank (1); the pretreatment tank (1) is equipped with a filtration mechanism inside; a heating mechanism is provided on the side wall of the pretreatment tank (1); a purification tank (2) is provided on one side of the pretreatment tank (1); a sprayer (3) is provided on the purification tank (2); and an exhaust pipe (4) is provided on the side wall of the purification tank (2).

2. The composite waste gas purification device according to claim 1, characterized in that: The filtration mechanism includes a rotating cavity (5); one end of the rotating cavity (5) extends to the outside of the pretreatment tank (1); the rotating cavity (5) and the pretreatment tank (1) are rotatably connected by bearings; a conveying pipe (6) is connected to the upper end of the rotating cavity (5); the conveying pipe (6) extends to the outside of the pretreatment tank (1); filter holes (7) are opened on the side wall of the rotating cavity (5); the number of filter holes (7) is several and evenly arranged; a first gear (8) is fixedly installed on the conveying pipe (6); a second gear (9) meshes on the first gear (8); a motor (10) is installed on the second gear (9); a rotary joint (11) is installed at the top end of the conveying pipe (6); and a sealing cap (12) is threadedly connected to the lower end of the rotating cavity (5).

3. The composite waste gas purification device according to claim 1, characterized in that: The heating mechanism includes a mounting cavity (13); the mounting cavity (13) is opened on the side wall of the pretreatment tank (1); an electric heating wire (14) is fixedly installed in the mounting cavity (13).

4. The composite waste gas purification device according to claim 1, characterized in that: A connecting pipe (15) is provided between the pretreatment tank (1) and the purification tank (2); the two ends of the connecting pipe (15) are respectively connected through the pretreatment tank (1) and the purification tank (2); an exhaust pump (16) is provided on the connecting pipe (15).

5. The composite waste gas purification device according to claim 1, characterized in that: A controller (17) is fixedly installed on the pretreatment tank (1); the controller (17) is electrically connected to the electric heating wire (14).

6. The composite waste gas purification device according to claim 2, characterized in that: The motor (10) is provided with a mounting base (18); the mounting base (18) is fixedly disposed with the pretreatment tank (1).

7. The composite waste gas purification device according to claim 1, characterized in that: The lower surfaces of the pretreatment tank (1) and the purification tank (2) are fixedly provided with support columns (19); there are three support columns (19) arranged in a circle; the support columns (19) on the pretreatment tank (1) and the support columns (19) on the purification tank (2) are set at the same height.

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