Plasma adsorption treatment device for waste gas containing organic monomers

Abstract

The application discloses a plasma adsorption treatment device for organic monomer waste gas, which comprises a shell, an inner cylinder rotatably installed in the shell, a first gas passing hole arranged on the side wall of the inner cylinder, a tail gas treatment area formed by the radial gap between the shell and the inner cylinder, a first unit area and a second unit area along the axial direction, a tail gas inlet corresponding to the first unit area, an exhaust port corresponding to the second unit area, a main shaft fixedly arranged at the rotating axis of the inner cylinder, a driving mechanism comprising a motor and a transmission shaft connected with the motor, an end of the transmission shaft being axially inserted into the main shaft, the main shaft and the inner cylinder being axially removed from the shell in the open state of the openable head, a discharge device fixed to the outer wall of the inner cylinder and arranged in the first unit area, and adsorption filler located on the outer wall of the inner cylinder and arranged in the second unit area. The application realizes deep treatment of waste gas generated in the production process of PDCPD products by combining plasma and catalytic adsorption.

Description

Technical Field

[0001] This invention relates to the field of PDCPD product processing equipment, and more specifically to a plasma adsorption treatment device for waste gas containing organic monomers. Background Technology

[0002] C5 or C9 fractions are byproducts of the ethylene process, accounting for approximately 2-6%. They are primarily dienes, composed of cyclopentadiene, isoprene, and isoprene, along with other components such as n-pentene, isoprene, cyclopentane / cyclopentene, pentane, 2-methyl-2-butene, and 3-methyl-1-butene. Dicyclopentadiene (DCPD) is a dimer of cyclopentadiene and can be prepared into cross-linked PDCPD. Currently, the commonly used molding process for PDCPD materials is reaction injection molding. Two chemically active, low-molecular-weight liquid raw materials, component A and component B, are mixed and then injected into a sealed mold to complete the polymerization, cross-linking, and curing reactions to form the molded part. The PDCPD preparation process generates waste gas containing cyclopentadiene and various active monomers, which, without proper treatment, can harm the environment. Summary of the Invention

[0003] This application provides a device for treating waste gas in a PDCPD product manufacturing workshop. It uses a combination of plasma and catalytic adsorption to deeply treat waste gas containing cyclopentadiene and reactive monomers, thereby solving the problem of waste gas treatment in PDCPD product manufacturing workshops.

[0004] A plasma adsorption treatment device for waste gas containing organic monomers includes:

[0005] The outer shell includes a horizontal cylindrical body and fixed end caps and openable end caps respectively installed at both ends of the cylindrical body. The side wall of the cylindrical body is provided with an exhaust gas inlet and an exhaust outlet.

[0006] The inner cylinder is rotatably installed inside the outer shell. The side wall of the inner cylinder is provided with a first air passage hole. The radial gap between the outer shell and the inner cylinder is the exhaust gas treatment area, and it includes a first unit area and a second unit area along the axial direction. The exhaust gas inlet corresponds to the first unit area, and the exhaust port corresponds to the second unit area.

[0007] The main shaft is fixedly installed at the rotation axis of the inner cylinder;

[0008] The drive mechanism includes a motor and a transmission shaft that is linked to the motor. The transmission shaft passes through the fixed end cap and is axially engaged with the end of the main shaft. When the open end cap is in the open state, the main shaft and the inner cylinder can be moved axially out of the outer shell together.

[0009] A discharge device is fixed to the outer wall of the inner cylinder and arranged in the first unit area;

[0010] The adsorption packing is located on the outer wall of the inner cylinder and arranged in the second unit area.

[0011] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0012] Optionally, in the second unit area, the inner cylinder is further fixed with an intermediate sleeve on its outer periphery. The intermediate sleeve is fixed to the outer wall of the inner cylinder by multiple ribs arranged along the axial direction. The adsorption filler covers the ribs and is filled between the intermediate sleeve and the inner cylinder. The ribs have a second vent hole for the exhaust gas to pass through.

[0013] Optionally, the ribs are divided into three groups along the flue gas flow direction; the first group of ribs is coated with manganese dioxide catalyst, and the adjacent gaps of the first group of ribs are filled with manganese dioxide catalyst; the second group of ribs is coated with activated carbon adsorbent, and the adjacent gaps of the second group of ribs are filled with active peptide adsorbent; the third group of ribs is coated with zeolite adsorbent, and the adjacent gaps of the third group of ribs are filled with zeolite adsorbent.

[0014] Optionally, the main shaft is a hollow shaft with an auxiliary channel inside. The side wall of the main shaft is provided with a third vent hole to connect the auxiliary channel and the inner cylinder. The end of the main shaft is connected to an auxiliary gas supply pipe that communicates with the auxiliary channel.

[0015] Optionally, the drive shaft and the corresponding end cap are rotated and sealed together.

[0016] Optionally, the inner cylinder is fixedly connected to the main shaft so that the inner cylinder and the main shaft rotate synchronously; the middle part of the inner cylinder is supported in the outer shell by a load-bearing bearing and a bearing seat; the bearing seat and the inner wall of the outer shell are slidably fitted along the axial direction of the outer shell so that when the openable end cap is in the open state, the main shaft and the inner cylinder move out of the outer shell along the axial direction.

[0017] Optionally, an observation window is provided on the cylindrical wall of the outer casing.

[0018] Optionally, the discharge device includes a positive electrode plate and a negative electrode plate fixed at intervals on the outer wall of the inner cylinder, the positive electrode plate and the negative electrode plate being connected to the positive and negative terminals of a power supply, respectively; the main shaft is connected to a high-voltage power supply, and the inner cylinder and the outer shell are both grounded.

[0019] Optionally, it may also include an intake main pump and an intake manifold, wherein the intake pump is connected to the exhaust gas inlet via the intake manifold.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] By combining plasma and catalytic adsorption, the waste gas containing cyclopentadiene and reactive monomers is deeply treated, solving the problem of waste gas treatment in the PDCPD product manufacturing workshop. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0023] Figure 2 for Figure 1 A cross-sectional view of the main body of the device shown.

[0024] The reference numerals in the figure are as follows:

[0025] 1-Outer shell 2-End cap 3-Exhaust gas inlet

[0026] 4-Inner cylinder 5-Main shaft 6-Motor

[0027] 7-Drive shaft 8-Intermediate sleeve 9-Rib plate

[0028] 10-Bearing bearing; 11-Bearing housing; 12-Positive electrode plate

[0029] 13-Negative electrode plate 14-Main intake pump 15-Main intake pipe

[0030] 16-Waste liquid tank 17-Waste solid tank 18-Controller cabinet

[0031] 19-Main reaction vessel; 20-Exhaust port; 21-Exhaust pipe

[0032] A - First Unit Area B - Second Unit Area Detailed Implementation

[0033] The technical solutions of 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0035] like Figure 1 and Figure 2As shown, a plasma adsorption treatment device for waste gas containing organic monomers includes a main reaction tank 19 and a driving device. A cross-sectional view of the main reaction tank and the driving device is shown below. Figure 2 As shown, the main reaction vessel includes an outer shell 1, an inner cylinder 4, a main shaft 5, a discharge device, and adsorption packing.

[0036] The outer casing 1 includes a horizontal cylindrical body and end caps 2 installed at both ends of the cylindrical body. One end cap is an openable end cap, such as a pressure chamber door, while the other end is a fixed end cap. Figure 2 Taking the orientation shown as an example, the only left end of the openable head has an exhaust gas inlet 3 and an exhaust port 20 on the side wall of the cylinder; the inner cylinder 4 is rotatably installed inside the outer shell 1, and the side wall of the inner cylinder 4 has a first air passage hole (not marked in the figure). The radial gap between the outer shell 1 and the inner cylinder 4 is the exhaust gas treatment area. The entire exhaust gas treatment area includes a first unit area A and a second unit area B along the axial direction. The exhaust gas inlet 3 corresponds to the first unit area, and the exhaust port 20 corresponds to the second unit area; the discharge device is fixed to the outer wall of the inner cylinder 4 and arranged in the first unit area A; the adsorption packing is located on the outer wall of the inner cylinder 4 and arranged in the second unit area B; the main shaft 5 is fixedly inserted through the rotation axis of the inner cylinder 4, and the main shaft drives the inner cylinder to rotate together; the drive mechanism includes a motor 6 and a transmission shaft 7 linked with the motor. The motor 6 can be connected to the transmission shaft 7 through a reduction mechanism. The transmission shaft 7 is inserted into the fixed head and is axially engaged with the end of the main shaft. When the openable head on the other side is open, the main shaft 5 and the inner cylinder 4 can be moved out of the outer shell 1 along the axial direction.

[0037] The waste gas generated in the PDCPD workshop and various production equipment is sent into the main reaction tank through the tail gas inlet. It is then subjected to plasma discharge treatment and adsorption treatment in sequence to remove organic pollutants such as cyclopentadiene and other raw material monomers as well as other dust pollutants from the waste gas.

[0038] The discharge device is located in the first unit area A. In one embodiment, the discharge device includes a positive electrode plate 12 and a negative electrode plate 13 fixed at intervals on the outer wall of the inner cylinder. The positive electrode plate and the negative electrode plate are respectively connected to the positive and negative terminals of the power supply. Both the positive electrode plate and the negative electrode plate can be annular ribs and fixed to the outer wall of the inner cylinder. The exhaust gas inlet 3 is located on the cylinder wall between the positive electrode plate and the negative electrode plate. The main shaft 5 is connected to a high-voltage power supply, and the inner cylinder 4 and the outer shell 1 are both grounded.

[0039] To facilitate the installation of the adsorption packing, in a preferred embodiment, in the second unit area B, the inner cylinder 4 is also fixed with an intermediate sleeve 8 on its outer periphery. The intermediate sleeve 8 is fixed to the outer wall of the inner cylinder 4 by multiple ribs 9 arranged along the axial direction. The ribs are made of a breathable porous material and have a second vent hole for the exhaust gas to pass through. The adsorption packing is mainly covered on the ribs, and a small amount of adsorption packing is also filled between the intermediate sleeve and the inner cylinder and between adjacent ribs.

[0040] In a more preferred embodiment, the adsorption packing in the second unit region B is segmented, with different packing materials used in each segment. In one specific embodiment, the ribs 9 are divided into three groups along the flue gas flow direction; the first group of ribs is coated with manganese dioxide catalyst, and the adjacent gaps of the first group of ribs are also filled with a portion of manganese dioxide catalyst; the second group of ribs is coated with activated carbon adsorbent, and the adjacent gaps of the second group of ribs are also filled with a portion of activated peptide adsorbent; the third group of ribs is coated with zeolite adsorbent, and the adjacent gaps of the third group of ribs are also filled with zeolite adsorbent.

[0041] During the waste gas treatment process, the main shaft 5 drives the inner cylinder 4 and the components on its outer wall to rotate. In one embodiment, the main shaft 5 is a hollow shaft with an auxiliary channel inside. A third vent hole is provided on the side wall of the main shaft to connect the auxiliary channel and the inner cylinder 4. An auxiliary gas supply pipe connected to the auxiliary channel is attached to the end of the main shaft 5. During the waste gas treatment process, some waste gas enters the inner cylinder through the first vent hole on the inner cylinder wall. As needed, a portion of the reaction auxiliary gas is introduced into the auxiliary channel of the main shaft through the auxiliary gas supply pipe and diffuses into the inner cylinder to mix with the waste gas, thus carrying out an auxiliary reaction to better remove pollutants from the waste gas. During the reaction, the outer shell must remain sealed, and the drive shaft 7 and the fixed end cap are in a rotating sealed fit.

[0042] The inner cylinder 4 is fixedly connected to the main shaft 5 to ensure synchronous rotation between them. The middle part of the inner cylinder is supported within the outer shell 1 by a load-bearing bearing 10 and a bearing seat 11 to increase the stability of the inner cylinder during the reaction. The bearing seat 11 and the inner wall of the outer shell 1 are in a sliding fit along the axial direction of the outer shell, so that the main shaft and the inner cylinder can be moved out of the outer shell axially together when the openable end cap is open. To facilitate observation of the reaction conditions inside the main reaction vessel during the reaction, an observation window is provided on the cylinder wall of the outer shell 1.

[0043] In a preferred embodiment, the system further includes a main intake pump 13 and a main intake pipe 15. The main intake pump 14 is connected to the exhaust gas inlet 3 via the main intake pipe 15. The waste gas generated in the PDCPD workshop and various production equipment is collected and then sent to the main reaction tank 19 by the main intake pump 13 and the main intake pipe 15 for reaction. The purified gas after the reaction is completed is discharged through the exhaust port 20, which is located near the closed end. The exhaust port 20 is connected to the exhaust pipe 21, and an explosion-proof device is installed on the exhaust pipe 21. The exhaust gas treatment device also includes a conventional waste liquid tank 16, a waste solid tank 17, and a controller cabinet 18.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A plasma adsorption treatment device for waste gas containing organic monomers, characterized in that, include: The outer shell includes a horizontal cylindrical body and fixed end caps and openable end caps respectively installed at both ends of the cylindrical body. The side wall of the cylindrical body is provided with an exhaust gas inlet and an exhaust outlet. The inner cylinder is rotatably installed inside the outer shell. The side wall of the inner cylinder is provided with a first air passage hole. The radial gap between the outer shell and the inner cylinder is the exhaust gas treatment area, and it includes a first unit area and a second unit area along the axial direction. The exhaust gas inlet corresponds to the first unit area, and the exhaust port corresponds to the second unit area. The main shaft is fixedly installed at the rotation axis of the inner cylinder; The drive mechanism includes a motor and a transmission shaft that is linked to the motor. The transmission shaft passes through the fixed end cap and engages with the end of the main shaft in an axial insertion-extraction manner. The discharge device is fixed to the outer wall of the inner cylinder and arranged in the first unit area; The adsorption packing is located on the outer wall of the inner cylinder and arranged in the second unit area; The inner cylinder is fixedly connected to the main shaft so that the inner cylinder and the main shaft rotate synchronously; the middle part of the inner cylinder is supported in the outer shell by a load-bearing bearing and a bearing seat; the bearing seat and the inner wall of the outer shell are slidably fitted along the axial direction of the outer shell so that when the openable end cap is in the open state, the main shaft and the inner cylinder move out of the outer shell along the axial direction.

2. The apparatus according to claim 1, characterized in that, In the second unit area, the inner cylinder is also fixed with an intermediate sleeve on its outer periphery. The intermediate sleeve is fixed to the outer wall of the inner cylinder by multiple ribs arranged along the axial direction. The adsorption filler covers the ribs and is filled between the intermediate sleeve and the inner cylinder. The ribs have a second vent hole for the exhaust gas to pass through.

3. The apparatus according to claim 2, characterized in that, The ribs are divided into three groups along the exhaust gas flow direction; the first group of ribs is coated with manganese dioxide catalyst, and the adjacent gaps of the first group of ribs are filled with manganese dioxide catalyst; the second group of ribs is coated with activated carbon adsorbent, and the adjacent gaps of the second group of ribs are filled with activated carbon adsorbent; the third group of ribs is coated with zeolite adsorbent, and the adjacent gaps of the third group of ribs are filled with zeolite adsorbent.

4. The apparatus according to claim 1, characterized in that, The main shaft is a hollow shaft with an auxiliary channel inside. The side wall of the main shaft is provided with a third vent hole to connect the auxiliary channel and the inner cylinder. The end of the main shaft is connected to an auxiliary gas supply pipe that communicates with the auxiliary channel.

5. The apparatus according to claim 1, characterized in that, The drive shaft and the corresponding end cap are in a rotating sealed fit.

6. The apparatus according to claim 1, characterized in that, An observation window is provided on the cylindrical wall of the outer shell.

7. The apparatus according to claim 1, characterized in that, The discharge device includes a positive electrode plate and a negative electrode plate fixed at intervals on the outer wall of the inner cylinder. The positive electrode plate and the negative electrode plate are respectively connected to the positive and negative terminals of a power supply. The main shaft is connected to a high-voltage power supply, and the inner cylinder and the outer shell are both grounded.

8. The apparatus according to claim 1, characterized in that, It also includes an intake main pump and an intake main pipe, wherein the intake main pump is connected to the exhaust gas inlet through the intake main pipe.

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