Ethyl acetate tail gas recovery device

Abstract

The utility model discloses an acetic ether tail gas recovery device, which relates to the technical field of tail gas recovery, and comprises a fixed frame, the upper end of the fixed frame is provided with a connecting frame, the connecting frame is hollow and is communicated with the inside of the fixed frame, the side wall of the connecting frame is provided with an opening, the opening is provided with a cold metal block in a sliding manner, and the cold metal block is connected with the fixed frame. The upper end of the cold metal block is communicated with a liquid inlet pipe, the lower end of the cold metal block is communicated with a liquid outlet pipe, a temperature sensor is fixedly arranged on the outer side wall of the cold metal block, and the temperature sensor is located in the connecting frame. And the tail gas cannot be liquefied by the temperature of the outer side wall of the cold metal block.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas recovery, in particular to an ethyl acetate tail gas recovery device. Background Art

[0002] Ethyl acetate tail gas recovery device is a device used to recover ethyl acetate tail gas. Ethyl acetate is a volatile organic compound, commonly used as a raw material for industrial products such as solvents, coatings and plastics. In the production process of ethyl acetate, a large amount of tail gas is generated, which contains unreacted ethyl acetate and other organic matter.

[0003] The Chinese utility model with publication number CN209696598U proposes a device for recovering vacuum tail gas in the production process of triethyl orthoformate: the tail gas generated by the production equipment is connected through an exhaust pipe and discharged into the inner cavity of a box body through the exhaust pipe. Most of the tail gas is sucked away by a vacuum pump in the box body, and a small amount of tail gas that is not sucked away rises, contacts the surface of a cold metal block, liquefies into liquid and falls to the bottom of the inner cavity of the box body, and enters a collecting kettle through a liquid down pipe. The tail gas sucked away by the vacuum pump is compressed and transported to a condensing box through a delivery pipe, condensed in a condensing pipe to form a liquid, and transported to a collecting kettle through a liquid delivery pipe for unified treatment.

[0004] However, the prior art still has shortcomings: since the cold metal block is arranged inside the top pipe, it will limit the maintenance of its low temperature, resulting in the temperature of the outer wall of the cold metal block being unable to liquefy the tail gas. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an ethyl acetate tail gas recovery device, which solves the problem in the prior art that the cold metal block is arranged inside the top pipe, which limits the maintenance of its low temperature, resulting in the outer wall temperature of the cold metal block being unable to liquefy the tail gas.

[0006] To achieve the above-mentioned purpose, the utility model proposes an ethyl acetate tail gas recovery device, comprising: a fixed frame, a connecting frame is arranged at the upper end of the fixed frame, the interior of the connecting frame is hollow and connected with the interior of the fixed frame, the side wall of the connecting frame is provided with an opening, a cold metal block is slidably arranged at the opening, the upper end of the cold metal block is connected with a liquid inlet pipe, the lower end of the cold metal block is connected with a liquid outlet pipe, a temperature sensor is fixedly arranged on the outer wall of the cold metal block, and the temperature sensor is located inside the connecting frame.

[0007] As a further solution of the utility model: a cavity is arranged inside the fixing frame, and a bottom plate is fixedly arranged at the lower end of the fixing frame.

[0008] As a further solution of the utility model: an air intake pipe is provided through one side of the fixed frame, one end of the air intake pipe extends to the outside of the fixed frame, and the other end of the air intake pipe extends to the cavity of the fixed frame and is fixedly connected with an amplifying cover.

[0009] As a further solution of the utility model: an air outlet pipe is provided on the other side of the fixed frame, one end of the air outlet pipe extends to the cavity of the fixed frame, the other end of the air outlet pipe extends to the outside of the fixed frame and is fixedly connected to a vacuum pump, the other end of the vacuum pump is fixedly connected to a connecting pipe, a fixing plate is fixedly provided at the lower end of the vacuum pump, the fixing plate is fixedly provided on the upper surface of the bottom plate, the upper end of the bottom plate is fixedly connected to a reaction box through a rod body, an alcohol solution is contained in the reaction box, and an end of the connecting pipe away from the vacuum pump passes through one side of the reaction box and extends into the interior of the reaction box.

[0010] As a further solution of the utility model: the connecting frame is fixedly connected to a fixing block on the outer side wall at the opening, the interior of the cold metal block is hollow, and sliding grooves are provided at both upper and lower ends of the cold metal block, and the fixing block is slidably connected inside the sliding groove.

[0011] As a further solution of the utility model: the liquid inlet pipe and the liquid outlet pipe are both located outside the connection frame, a handle is fixedly connected to the other outer side wall of the cold metal block, and the temperature sensor is electrically connected to an external device.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] In order to ensure that the cold metal block is always at a low temperature, when the temperature sensor senses that the temperature of the outer wall of the cold metal block cannot liquefy the exhaust gas, the temperature sensor sends a signal to the external device, and the external device notifies the staff. The staff slides the cold metal block by the handle, opens the liquid outlet pipe, pours out the coolant inside the cold metal block, adds new coolant to the liquid inlet pipe, and then slides the cold metal block by the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is an enlarged view of part A of the utility model.

[0016] In the figure: 1. bottom plate; 2. fixing frame; 3. fixing plate; 4. vacuum pump; 5. air inlet pipe; 6. connecting frame; 7. reaction box; 8. connecting pipe; 9. cold metal block; 10. temperature sensor; 11. slide; 12. fixing block; 13. liquid inlet pipe; 14. handle; 15. liquid outlet pipe. DETAILED DESCRIPTION

[0017] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 1-2 As shown, an ethyl acetate tail gas recovery device includes: a fixed frame 2, a cavity is arranged inside the fixed frame 2, a connecting frame 6 is arranged at the upper end of the fixed frame 2, the connecting frame 6 is hollow inside and communicated with the interior of the fixed frame 2, and a bottom plate 1 is fixedly arranged at the lower end of the fixed frame 2.

[0019] An air intake pipe 5 is provided through one side of the fixed frame 2, one end of the air intake pipe 5 extends to the outside of the fixed frame 2, and the other end of the air intake pipe 5 extends to the cavity of the fixed frame 2 and is fixedly connected to an amplifying cover. By setting the amplifying cover, the flow rate of the exhaust gas can be increased and the processing efficiency of the device can be improved.

[0020] An air outlet pipe is provided through the other side of the fixed frame 2, one end of the air outlet pipe extends to the cavity of the fixed frame 2, the other end of the air outlet pipe extends to the outside of the fixed frame 2 and is fixedly connected to a vacuum pump 4, the other end of the vacuum pump 4 is fixedly connected to a connecting pipe 8, a fixing plate 3 is fixedly provided at the lower end of the vacuum pump 4, and the fixing plate 3 is fixedly provided on the upper surface of the base plate 1.

[0021] The upper end of the base plate 1 is fixedly connected to a reaction box 7 via a rod. The reaction box 7 contains an alcohol solution for absorbing ethyl acetate tail gas. The ethyl acetate molecules in the ethyl acetate tail gas can react with alcohol or dissolve in alcohol, thereby being absorbed. The end of the connecting pipe 8 away from the vacuum pump 4 passes through one side of the reaction box 7 and extends into the interior of the reaction box 7.

[0022] The production equipment is connected via an air intake pipe 5, and the ethyl acetate tail gas generated by the production equipment passes through the interior of the fixed frame 2 of the air intake pipe 5. Most of the tail gas in the fixed frame 2 is sucked away by the vacuum pump 4. The tail gas sucked away by the vacuum pump 4 is compressed and transported to the reaction box 7 through the connecting pipe 8. The ethyl acetate molecules in the ethyl acetate tail gas react with the alcohol solution, dissolve in the alcohol, and are thus absorbed. Finally, the alcohol solution after the reaction can be dissolved in water.

[0023] The side wall of the connecting frame 6 is provided with an opening, and a cold metal block 9 is slidably arranged at the opening. A fixed block 12 is fixedly connected to the outer wall of the connecting frame 6 at the opening. The interior of the cold metal block 9 is hollow, and a slide groove 11 is provided at the upper and lower ends of the cold metal block 9. The fixed block 12 is slidably connected inside the slide groove 11.

[0024] The upper end of the cold metal block 9 is connected to a liquid inlet pipe 13 , and the lower end of the cold metal block 9 is connected to a liquid outlet pipe 15 . Both the liquid inlet pipe 13 and the liquid outlet pipe 15 are located outside the connection frame 6 .

[0025] A handle 14 is fixedly connected to the outer side wall of the cold metal block 9 , and a temperature sensor 10 is fixedly provided on the other outer side wall of the cold metal block 9 . The temperature sensor 10 is located inside the connection frame 6 , and the temperature sensor 10 is electrically connected to an external device.

[0026] Working principle:

[0027] Most of the exhaust gas in the fixed frame 2 is pumped away by the vacuum pump 4 , and a small amount of exhaust gas that is not pumped away rises, contacts the surface of the cold metal block 9 , liquefies into liquid and falls to the bottom of the fixed frame 2 .

[0028] In order to ensure that the cold metal block 9 is always in a low temperature state, when the temperature sensor 10 senses that the temperature of the outer wall of the cold metal block 9 cannot liquefy the exhaust gas, the temperature sensor 10 sends a signal to the external device, and the external device notifies the staff. The staff slides the cold metal block 9 through the handle 14, opens the liquid outlet pipe 15, pours out the coolant inside the cold metal block 9, adds new coolant to the liquid inlet pipe 13, and then slides the cold metal block 9 through the handle 14 to push the cold metal block 9 into the interior of the connecting frame 6.

[0029] In the description of the present utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, as well as a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present utility model. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. An ethyl acetate tail gas recovery device, characterized in that: include: A fixed frame (2), wherein a connecting frame (6) is arranged at the upper end of the fixed frame (2), the interior of the connecting frame (6) is hollow and communicates with the interior of the fixed frame (2), the side wall of the connecting frame (6) is provided with an opening, a cold metal block (9) is slidably arranged at the opening, the upper end of the cold metal block (9) is communicated with a liquid inlet pipe (13), the lower end of the cold metal block (9) is communicated with a liquid outlet pipe (15), a temperature sensor (10) is fixedly arranged on the outer wall of the cold metal block (9), and the temperature sensor (10) is located inside the connecting frame (6).

2. The ethyl acetate tail gas recovery device according to claim 1, characterized in that: A cavity is provided inside the fixing frame (2), and a bottom plate (1) is fixedly provided at the lower end of the fixing frame (2).

3. The ethyl acetate tail gas recovery device according to claim 1, characterized in that: An air intake pipe (5) is provided through one side of the fixed frame (2), one end of the air intake pipe (5) extends to the outside of the fixed frame (2), and the other end of the air intake pipe (5) extends to the cavity of the fixed frame (2) and is fixedly connected to an amplifying cover.

4. The ethyl acetate tail gas recovery device according to claim 2, characterized in that: An air outlet pipe is provided through the other side of the fixed frame (2), one end of the air outlet pipe extends to the cavity of the fixed frame (2), the other end of the air outlet pipe extends to the outside of the fixed frame (2) and is fixedly connected to a vacuum pump (4), the other end of the vacuum pump (4) is fixedly connected to a connecting pipe (8), a fixing plate (3) is fixedly provided at the lower end of the vacuum pump (4), the fixing plate (3) is fixedly provided on the upper surface of the bottom plate (1), the upper end of the bottom plate (1) is fixedly connected to a reaction box (7) through a rod body, an alcohol solution is contained in the reaction box (7), and the end of the connecting pipe (8) away from the vacuum pump (4) passes through one side of the reaction box (7) and extends into the interior of the reaction box (7).

5. The ethyl acetate tail gas recovery device according to claim 1, characterized in that: The connection frame (6) is fixedly connected to a fixed block (12) on the outer wall at the opening; the interior of the cold metal block (9) is hollow; upper and lower ends of the cold metal block (9) are provided with sliding grooves (11); and the fixed block (12) is slidably connected inside the sliding grooves (11).

6. The ethyl acetate tail gas recovery device according to claim 1, characterized in that: The liquid inlet pipe (13) and the liquid outlet pipe (15) are both located outside the connection frame (6); a handle (14) is fixedly connected to the other outer side wall of the cold metal block (9); and the temperature sensor (10) is electrically connected to an external device.

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