Waste gas absorption device for polyether polyol production

Abstract

The utility model provides a waste gas absorption device for polyether polyol production, the waste gas absorption device comprises a first tank body and a second tank body, the first tank body and the second tank body are both internally provided with cylindrical adsorption cylinders, and the adsorption cylinders are axially provided with a plurality of through holes in a penetrating manner; the lower end of the first tank body and the lower end of the second tank body are both communicated with first circulating pipe openings, a first valve is arranged between the first circulating pipe openings and the first tank body, a second valve is arranged between the first circulating pipe openings and the second tank body, and the upper end of the first tank body and the upper end of the second tank body are both communicated with second circulating pipe openings. A sixth valve is arranged between the second circulating pipe orifice and the first tank body; and a third valve is arranged between the second circulating pipe orifice and the second tank body. According to the waste gas treatment device, the first tank body and the second tank body are arranged, so that continuous waste gas absorption and waste gas release can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas absorption, and particularly relates to a waste gas absorption device for polyether polyol production. Background Art

[0002] During the chemical production process, it is inevitable to generate toxic and harmful gases. Such gases cannot be directly discharged into the atmosphere. If they can be recovered, they will be recovered and treated. If they cannot be recovered and treated, they are waste gases that need to be purified. The treatment methods for waste gases include absorption method, adsorption method, thermal decomposition method, incineration and catalytic combustion method, condensation recovery method, UV ultraviolet method, membrane separation method, multiphase catalytic oxidation technology, etc.

[0003] The adsorption method uses adsorbents such as activated carbon to remove organic components in the waste gas through physical adsorption or chemical reactions. When treating waste gas by the adsorption method, it is necessary to continuously adsorb the waste gas, otherwise it cannot treat the continuously discharged waste gas, which affects the normal production of chemical products. Summary of the Invention

[0004] To solve the above problems, the present invention discloses a waste gas absorption device for polyether polyol production, which includes a first tank body and a second tank body. Inside both the first tank body and the second tank body, there are cylindrical adsorption cylinders axially penetrated with a plurality of through holes. The structures of the first tank body and the second tank body are the same, except that when one is performing an adsorption operation, the other is performing a release operation to ensure continuous absorption and release treatment of the waste gas. When the waste gas passes through the through holes, the organic substances therein are adsorbed in the adsorption cylinder.

[0005] At the lower ends of both the first tank body and the second tank body, there are first circulation pipe orifices connected in communication. A first valve is arranged between the first circulation pipe orifice and the first tank body, and a second valve is arranged between the first circulation pipe orifice and the second tank body. That is, the first circulation pipe orifice is connected to the first tank body or the second tank body through the first valve and the second valve.

[0006] At the upper ends of both the first tank body and the second tank body, there are second circulation pipe orifices connected in communication. A sixth valve is arranged between the second circulation pipe orifice and the first tank body, and a third valve is arranged between the second circulation pipe orifice and the second tank body. Similarly, the second circulation pipe orifice is connected to the first tank body or the second tank body through the third valve and the sixth valve.

[0007] Furthermore, most of the existing industrial waste gases are generated in reaction kettles. Therefore, most of the generated waste gases are directly input into the waste gas treatment system. However, production raw materials will also enter the waste gas treatment system during the process, resulting in waste. Here, a first circulation pipe orifice and a second circulation pipe orifice are provided, so that the two pipe orifices are connected to the reaction kettle, and an exhaust fan is additionally provided in this pipeline to realize gas circulation. That is, during the circulation process, harmful substances in the waste gas are adsorbed as much as possible, and the chemical raw materials enter the reaction kettle again, which can improve the utilization rate.

[0008] Preferably, activated carbon is filled and arranged in the adsorption cylinder. Activated carbon is a common adsorption material, and the cost of using activated carbon is relatively low.

[0009] Preferably, adsorption resin is filled and arranged in the adsorption cylinder. According to the type of waste gas, targeted adsorption resin can be selected to perform selective absorption treatment on the generated waste gas.

[0010] Preferably, a frame is arranged on the outer side of the adsorption cylinder, and convex rings are arranged inside both the first tank body and the second tank body. The circular ring at the end of the frame is in direct contact with the convex ring. The frame is used to support and fix the adsorption cylinder. At the same time, with the structure of the convex ring, it is ensured that the waste gas can only pass through.

[0011] Preferably, exhaust gas outlets are connected and arranged at the upper ends of both the first tank body and the second tank body. A fifth valve is arranged between the exhaust gas outlet and the first tank body, and a fourth valve body is arranged between the exhaust gas outlet and the second tank body. Through the fourth valve and the fifth valve, the connection between the exhaust gas outlet and the first tank body or the second tank body is realized, so as to discharge the waste gas therein.

[0012] Preferably, the absorption device further includes a heat circulation system. The heat circulation system includes a compressor, a reversing valve, a first heat exchange pipe and a second heat exchange pipe. The first heat exchange pipe and the second heat exchange pipe are respectively inserted into different adsorption cylinders. The pipeline extended by the compressor is connected to the reversing valve, and the pipeline extended by the reversing valve realizes the series connection of the first heat exchange pipe and the second heat exchange pipe. When the adsorption tube is performing adsorption operation, adsorption resin is filled in the adsorption cylinder, and heat will be generated when the adsorption resin adsorbs organic substances. By heating the adsorption resin, the adsorbed organic substances can be released. Therefore, the additional heat circulation system is used to promote the absorption or release of the adsorption tank.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. There are a first tank body and a second tank. When one tank body is performing adsorption treatment, the other tank body is releasing waste gas, ensuring continuous absorption treatment of the waste gas.

[0015] 2. A thermal cycle system is provided. When one tank body is performing adsorption treatment, it can absorb the heat generated by adsorption to improve the adsorption effect. When the other tank body is discharging waste gas, it can release heat to improve the discharging effect. Description of the Drawings

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0017] Figure 2 It is a three-dimensional schematic diagram of the adsorption cylinder of the present invention;

[0018] Figure 3 It is a schematic diagram of the thermal cycle system of the present invention.

[0019] List of Reference Numerals:

[0020] 1. First tank body; 2. First valve; 3. First circulation pipe orifice; 4. Second valve; 5. Compressor; 6. Second tank body; 7. Third valve; 8. Fourth valve; 9. Second circulation pipe orifice; 10. Waste gas outlet; 11. Fifth valve; 12. Sixth valve; 13. Frame; 14. Adsorption cylinder; 15. Through hole; 16. Directional valve; 17. First heat exchange pipe; 18. Second heat exchange pipe. Detailed Embodiment

[0021] The present invention will be further clarified below in conjunction with the drawings and detailed embodiments. It should be understood that the following detailed embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0022] As Figures 1 to 3 shown, an exhaust gas absorption device for polyether polyol production includes a first tank body 1 and a second tank body 6. The first tank body 1 and the second tank body 6 have the same structure, both are two-piece structures, and form a cylindrical structure. Inside the first tank body 1 and the second tank body 6, cylindrical adsorption cylinders 14 are provided. A plurality of through holes 15 are axially penetrated through the adsorption cylinders 14, and the waste gas passes through the through holes 15, and the organic matter therein is adsorbed by the adsorption cylinders 14.

[0023] At the lower ends of the first tank body 1 and the second tank body 6, first circulation pipe orifices 3 are connected and arranged. A first valve 2 is arranged between the first circulation pipe orifice 3 and the first tank body 1, and a second valve 4 is arranged between the first circulation pipe orifice 3 and the second tank body 6. Through the first valve 2 and the second valve 4, the first circulation pipe orifice 3 can be connected to the first tank body 1 or the second tank body 6.

[0024] The upper ends of the first tank body 1 and the second tank body 6 are both connected with a second circulation pipe port 9, a sixth valve 12 is provided between the second circulation pipe port 9 and the first tank body 1, and a third valve 7 is provided between the second circulation pipe port 9 and the second tank body 6. The second circulation pipe port 9 is connected with the first tank body 1 or the second tank body 6 through the third valve 7 and the sixth valve 12.

[0025] Activated carbon or adsorption resin is filled in the adsorption cylinder 14. Activated carbon is used, that is, the material is relatively common, which is conducive to reducing production costs, while the adsorption resin can be used to select a suitable type of targeted adsorption of organic matter.

[0026] A frame 13 is provided on the outside of the adsorption cylinder 14. The frame 13 includes circular rings at the upper and lower ends, and the two circular rings are fixedly connected by pipe fittings. The first tank body 1 and the second tank body 6 are both provided with convex rings. The circular rings at the ends of the frame 13 are in direct contact with the convex rings. When the adsorption cylinder 14 is installed, the convex ring presses against the circular ring, so that the exhaust gas can only pass through the through hole 15, thereby preventing the exhaust gas from being discharged without being adsorbed and treated.

[0027] The upper ends of the first tank body 1 and the second tank body 6 are both connected to be provided with an exhaust gas outlet 10, a fifth valve 11 is provided between the exhaust gas outlet 10 and the first tank body 1, and a fourth valve body 8 is provided between the exhaust gas outlet 10 and the second tank body 6. That is, by means of the fourth valve 8 and the fifth valve 11, the exhaust gas outlet 10 is connected to the first tank body 1 or the second tank body 6, that is, the adsorbed exhaust gas is discharged into the next stage of exhaust gas treatment.

[0028] The absorption device also includes a heat circulation system, which includes a compressor 5, a reversing valve 16, a first heat exchange tube 17 and a second heat exchange tube 18. The first heat exchange tube 17 and the second heat exchange tube 18 are respectively inserted into different adsorption cylinders 14. The pipeline extended from the compressor 5 is connected to the reversing valve 16. The compressor 5 compresses the medium in the pipeline. The pipeline extended from the reversing valve 16 realizes the series connection of the first heat exchange tube 17 and the second heat exchange tube 18. The use of the reversing valve 16 can make the refrigerant evaporate or condense in the first heat exchange tube 17 or the second heat exchange tube 18.

[0029] Working principle: The first circulation pipe port 3, the second circulation pipe port 9 and the reactor are connected, and an exhaust fan is arranged on the pipeline, so that the exhaust gas generated by the reactor can pass through the first tank body 1 or the second tank body 6 and return to the reactor.

[0030] When the first tank 1 adsorbs waste gas and the second tank 6 releases waste gas, at this time, the first valve 2, the fourth valve 8, and the sixth valve 12 are opened, and the second valve 4, the third valve 7, and the fifth valve 11 are closed. At the same time, inside the first tank 1, the refrigerant evaporates and absorbs heat, transferring and reducing the heat generated by the waste gas, thereby promoting the adsorption efficiency. Inside the second tank 6, the refrigerant condenses and releases heat, heating the adsorption cylinder 14, so that the adsorbed waste gas is quickly separated, and the released waste gas is sent out from the waste gas outlet 10;

[0031] When the first tank 1 releases waste gas and the second tank 6 adsorbs waste gas, at this time, the second valve 4, the third valve 7, and the fifth valve 11 are opened, and the first valve 2, the fourth valve 8, and the sixth valve 12 are closed. At the same time, inside the first tank 1, the refrigerant condenses and releases heat, heating the adsorption cylinder 14, so that the adsorbed waste gas is quickly separated, and the released waste gas is sent out from the waste gas outlet 10. Inside the second tank 6, the refrigerant evaporates and absorbs heat, transferring and reducing the heat generated by the waste gas, thereby promoting the adsorption efficiency.

[0032] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A waste gas absorption device for polyether polyol production, characterized in that: It comprises a first tank body (1) and a second tank body (6), wherein a cylindrical adsorption cylinder (14) is arranged inside the first tank body (1) and the second tank body (6), and a plurality of through holes (15) are axially penetrated through the adsorption cylinder (14); The lower ends of the first tank body (1) and the second tank body (6) are both connected and provided with a first circulation pipe opening (3), a first valve (2) is provided between the first circulation pipe opening (3) and the first tank body (1), and a second valve (4) is provided between the first circulation pipe opening (3) and the second tank body (6); The upper ends of the first tank body (1) and the second tank body (6) are both connected to each other and are provided with a second circulation pipe port (9); a sixth valve (12) is provided between the second circulation pipe port (9) and the first tank body (1); and a third valve (7) is provided between the second circulation pipe port (9) and the second tank body (6).

2. The waste gas absorption device for polyether polyol production according to claim 1, characterized in that: The adsorption cylinder (14) is filled with activated carbon.

3. The waste gas absorption device for polyether polyol production according to claim 1, characterized in that: The adsorption cylinder (14) is filled with adsorption resin.

4. The waste gas absorption device for polyether polyol production according to claim 1, characterized in that: A frame (13) is provided on the outside of the adsorption cylinder (14), and convex rings are provided inside the first tank body (1) and the second tank body (6), and the circular ring at the end of the frame (13) is in direct contact with the convex ring.

5. The waste gas absorption device for polyether polyol production according to claim 1, characterized in that: The upper ends of the first tank body (1) and the second tank body (6) are both connected and provided with an exhaust gas outlet (10), a fifth valve (11) is provided between the exhaust gas outlet (10) and the first tank body (1), and a fourth valve body (8) is provided between the exhaust gas outlet (10) and the second tank body (6).

6. The waste gas absorption device for polyether polyol production according to claim 1, characterized in that: The absorption device further comprises a heat circulation system, the heat circulation system comprising a compressor (5), a reversing valve (16), a first heat exchange tube (17) and a second heat exchange tube (18), the first heat exchange tube (17) and the second heat exchange tube (18) being respectively inserted into different adsorption cylinders (14), the pipeline extending from the compressor (5) being connected to the reversing valve (16), and the pipeline extending from the reversing valve (16) realizing the series connection of the first heat exchange tube (17) and the second heat exchange tube (18).

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