Tail gas absorption device for producing 2-ethylhexyl acrylate

Abstract

The utility model relates to the technical field of 2-ethylhexyl acrylate production, in particular to a tail gas absorption device for 2-ethylhexyl acrylate production, which comprises an absorption tank, a cylinder is arranged in the absorption tank, the bottom of the cylinder is fixed on a first supporting seat, and a waste discharge pipe is coaxially mounted at the bottom of the first supporting seat. The waste discharge pipe penetrates through the bottom of the absorption tank and is rotationally connected with the absorption tank; a valve is mounted at the bottom of the waste discharge pipe; an air inlet pipe is arranged in the waste discharge pipe, one end of the air inlet pipe extends upwards and is provided with an air outlet pipe, and a plurality of air outlets are formed in the air outlet pipe. The tail gas treatment device has the beneficial effects that a catalyst and a reducing agent are introduced into the bottom of the cylinder, and tail gas reacts before being in contact with the activated carbon plate, so that nitrogen oxide gas in the tail gas is treated in advance, the utilization rate of the activated carbon plate is reduced, and the service life of the activated carbon plate is prolonged; the replacement frequency of the activated carbon plate is reduced, and the production efficiency of the 2-ethylhexyl acrylate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to acrylic acid isooctyl ester production technical field especially relates to a tail gas absorption device of acrylic acid isooctyl ester production. BACKGROUND

[0002] Acrylic acid isooctyl ester is mainly used for making macromolecular polymer, such as coating, adhesive and plastic modifier etc. It is used for preparing various indoor and outdoor coatings, wood coatings, metal coatings etc. as one of the main components of coating, because of its excellent weather resistance, water resistance and chemical resistance, can improve the durability and service life of coating.

[0003] A large amount of tail gas will be produced in acrylic acid isooctyl ester production, these tail gas contain carbon dioxide, nitrogen oxides, and nitrogen oxides gas has strong harmfulness to environment and human health, therefore needs to absorb and handle its tail gas when producing acrylic acid isooctyl ester, currently commonly used for active carbon adsorption method is absorbed, and single active carbon adsorption is easy to appear active carbon saturation in the absorption process, thereby leading to the absorption effect decline and failure, and repeatedly replacing active carbon in the absorption of tail gas, not only needs to suspend the production of acrylic acid isooctyl ester, delays the production progress of acrylic acid isooctyl ester, but also may appear the condition of partial tail gas leakage.

[0004] Therefore, a tail gas absorption device for producing acrylic acid isooctyl ester is provided. Utility model content

[0005] The utility model aims at solving the shortcoming that single active carbon is used to absorb tail gas in prior art, and the production progress of acrylic acid isooctyl ester is delayed due to replacement of active carbon, and provides a tail gas absorption device for producing acrylic acid isooctyl ester.

[0006] Therefore, the utility model provides a tail gas absorption device for producing acrylic acid isooctyl ester, which comprises an absorption tank, a cylinder is arranged in the inside of the absorption tank, the bottom of the cylinder is fixed on a first support base, a waste discharge pipe is coaxially arranged on the bottom of the first support base, the waste discharge pipe penetrates through the bottom of the absorption tank and is rotatably connected with the absorption tank, and a valve is arranged on the bottom of the waste discharge pipe.

[0007] An air inlet pipe is arranged in the waste discharge pipe, one end of the air inlet pipe extends upward and is provided with an air outlet pipe, a plurality of air outlets are formed in the air outlet pipe, and the other end of the air inlet pipe penetrates through the side wall of the waste discharge pipe and is provided with a branch pipe on the side surface away from the air outlet pipe.

[0008] A second support base is fixed on the top of the cylinder, a connecting pipe is coaxially installed on the top of the second support base, the connecting pipe penetrates the top of the absorption tank and is rotationally connected with a feeding pipe, the connecting pipe is rotationally connected with the top of the absorption tank, and a driving mechanism for driving the rotation of the connecting pipe is installed on the top of the connecting pipe.

[0009] A plurality of slot are arranged on the sidewall of the top of the cylinder, and an arc-shaped activated carbon plate is arranged on the top of the cylinder.

[0010] Preferably, the absorption tank comprises two oppositely arranged arc-shaped plates, an upper cover and a bottom cover are arranged at the upper and lower ends of the arc-shaped plates respectively, a first connecting seat is arranged along the edge of the arc-shaped plate, and a second connecting seat is arranged along the side edge of the arc-shaped plate close to the upper cover and the bottom cover.

[0011] Preferably, the waste pipe is rotationally connected with the bottom cover, and the connecting pipe is rotationally connected with the upper cover.

[0012] Preferably, the driving mechanism comprises a first gear coaxially installed on the top of the connecting pipe, a second gear meshing with the side surface of the first gear, a driving shaft coaxially installed on the second gear, the bottom of the driving shaft rotationally installed on the upper cover, and a driving motor connected with the other end of the driving shaft, the driving motor being fixed on the upper cover through a support.

[0013] Preferably, a hollow annular seat is arranged below the upper cover, a plurality of air inlets are arranged on the bottom of the annular seat, the top of the annular seat is connected with the inlet of an air pump through a conduit, the air pump is installed on the top of the upper cover, and an exhaust pipe is installed on the outlet of the air pump.

[0014] Preferably, a stirring shaft is arranged in the cylinder, stirring blades are arranged on the side surface of the stirring shaft, and the top of the stirring shaft is fixed with the bottom of the connecting pipe through at least two spaced connecting rods.

[0015] Spiral blades are arranged on the inner wall of the bottom of the cylinder, and the material in the bottom of the cylinder is upwardly conveyed when the cylinder rotates.

[0016] Preferably, an annular flow guide seat with a top surface inclined to the middle is arranged in the bottom of the cylinder, the sidewall of the flow guide seat is fixed with the inner wall of the cylinder, and the flow guide seat is fixed on the top of the first support base.

[0017] A heating plate is arranged on the top surface of the flow guide seat, and a temperature sensor is arranged on the bottom of the second support base.

[0018] Preferably, a control cabinet is installed on the outer wall of one of the curved plates, and a controller is installed inside the control cabinet. The controller is connected to the drive motor, air pump, heating plate and temperature sensor respectively through wires.

[0019] Compared with the prior art, this utility model provides a tail gas absorption device for the production of isooctyl acrylate, which has the following beneficial effects:

[0020] 1. This utility model introduces a catalyst and a reducing agent into the bottom of a cylinder, allowing the exhaust gas to react before contacting the activated carbon plate. This pre-treats the nitrogen oxides in the exhaust gas, reduces the utilization rate of the activated carbon plate, thereby increasing its service life, reducing the frequency of replacement, and improving the production efficiency of isooctyl acrylate.

[0021] 2. This invention utilizes the rotation of spiral blades and stirring blades to perform upward material transfer and stirring operations on the catalyst and reducing agent, thereby improving the flow contact between the exhaust gas and the catalyst and reducing agent, and thus improving the reaction efficiency of nitrogen oxides in the exhaust gas with the catalyst and reducing agent. Attached Figure Description

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

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the cylindrical structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the cylinder of this utility model. Figure 1 ;

[0026] Figure 5 This is a schematic diagram of the internal structure of the cylinder of this utility model. Figure 2 .

[0027] In the diagram: 1. Arc-shaped plate; 2. Top cover; 3. Bottom cover; 4. First connecting seat; 5. Second connecting seat; 6. Cylinder; 7. First support seat; 8. Groove; 9. Second support seat; 10. Activated carbon plate; 11. Waste discharge pipe; 12. Air inlet pipe; 13. Valve; 14. Branch pipe; 15. Air outlet pipe; 16. Connecting pipe; 17. Feeding pipe; 18. First gear; 19. Second gear; 20. Drive shaft; 21. Drive motor; 22. Connecting rod; 23. Stirring shaft; 24. Stirring blade; 25. Spiral blade; 26. Guide seat; 27. Heating plate; 28. Temperature sensor; 29. ​​Annular seat; 30. Air inlet; 31. Air pump; 32. Exhaust pipe; 33. Control cabinet. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] Please refer to Figures 1 to 5 An exhaust gas absorption device for producing isooctyl acrylate, comprising an absorption tank, wherein the absorption tank comprises two oppositely arranged arc-shaped plates 1, an upper cover 2 and a bottom cover 3 are arranged at the upper and lower ends of the arc-shaped plates 1 respectively, a first connecting seat 4 is installed along the edge of the arc-shaped plate 1, and a second connecting seat 5 is installed along the side edge of the arc-shaped plate 1 close to the upper cover 2 and the side edge of the arc-shaped plate 1 close to the bottom cover 3, so that the two arc-shaped plates 1, the upper cover 2 and the arc-shaped plate 1, and the bottom cover 3 and the arc-shaped plate 1 are fixed by fasteners, and in actual use, the fasteners are one of bolts or screws, so that the arc-shaped plates 1, the arc-shaped plates 1 and the upper cover 2, and the arc-shaped plates 1 and the bottom cover 3 can be detachably installed, facilitating cleaning and other operations on the inside of the absorption tank.

[0031] As Figure 2 and Figure 3 shown, a cylinder 6 is arranged in the inside of the absorption tank, i.e. between the two arc-shaped plates 1, the bottom of the cylinder 6 is fixed on a first support seat 7, the bottom of the first support seat 7 is coaxially provided with a waste pipe 11, the waste pipe 11 penetrates the bottom of the absorption tank and is rotatably connected between the two, i.e. the waste pipe 11 penetrates the bottom cover 3 and is rotatably connected with the bottom cover 3, and the bottom of the waste pipe 11 is provided with a valve 13, so that the waste material located in the cylinder 6 can be discharged from the waste pipe 11.

[0032] When the exhaust gas is absorbed and treated, as Figure 2 and Figure 4As shown in the waste pipe 11 inside the exhaust pipe 12, one end of the air inlet pipe 12 extends upward and is provided with an air outlet pipe 15, the air outlet pipe 15 is provided with a plurality of air outlets, and the other end of the air inlet pipe 12 penetrates the side wall of the exhaust pipe 11, the exhaust gas is introduced into the cylinder 6 from the air inlet pipe 12, and the branch pipe 14 is installed on the side of the air inlet pipe 12 away from the air outlet pipe 15. In actual use, the reducing agent is one of ammonia gas and hydrogen sulfide gas, and the reducing agent is introduced into the cylinder 6 along with the exhaust gas from the branch pipe 14.

[0033] Subsequently, as shown in Figure 1 and Figure 5 The top of the cylinder 6 is fixed to the second support 9, the top of the second support 9 is coaxially connected to the connecting pipe 16, the connecting pipe 16 penetrates the top of the absorption tank and is rotatably connected to the feeding pipe 17, and the connecting pipe 16 is rotatably connected to the top of the absorption tank. The top of the connecting pipe 16 is provided with a driving mechanism for driving the rotation of the connecting pipe 16. In actual use, the catalyst is one of copper, iron, cobalt, vanadium and other oxides, and the catalyst is added to the cylinder 6 from the feeding pipe 17.

[0034] Further, the driving mechanism includes a first gear 18 coaxially installed on the top of the connecting pipe 16, a second gear 19 engaged on the side of the first gear 18, a driving shaft 20 coaxially installed on the second gear 19, the bottom of the driving shaft 20 rotatably installed on the upper cover 2, and the other end of the driving shaft 20 connected to the driving motor 21. The driving motor 21 is fixed to the upper cover 2 by a support, and in actual use, the feeding pipe 17 is fixed to the upper cover 2 by a support, and the driving motor 21 provides power for the rotation of the cylinder 6.

[0035] It should be noted that, as shown in Figure 4 A stirring shaft 23 is arranged in the cylinder 6, a stirring blade 24 is arranged on the side of the stirring shaft 23, the top of the stirring shaft 23 is fixed to the bottom of the connecting pipe 16 through at least two spaced connecting rods 22, the stirring blade 24 stirs the catalyst in the cylinder 6, and the exhaust gas, catalyst and reducing agent are in better contact; The spiral blade 25 is installed on the inner wall of the bottom of the cylinder 6, which drives the material at the bottom of the cylinder 6 to be transported upward when the cylinder 6 rotates, further improving the contact among the exhaust gas, catalyst and reducing agent.

[0036] Specifically, the exhaust gas, catalyst, and reducing agent entering the cylinder 6 will react inside the cylinder 6 to generate nitrogen and water. In order for the reaction to proceed normally, an annular guide seat 26 with its top surface inclined towards the center is provided at the bottom of the cylinder 6. The side wall of the guide seat 26 is fixed to the inner wall of the cylinder 6, and the guide seat 26 is fixed on the top of the first support seat 7. A heating plate 27 is installed on the top surface of the guide seat 26 to heat the exhaust gas, catalyst, and reducing agent placed in the cylinder 6 to keep them at a suitable reaction temperature. In addition, a temperature sensor 28 is installed at the bottom of the second support seat 9 to monitor the temperature inside the cylinder 6.

[0037] It should be noted that multiple slots 8 are arranged at intervals on the top side wall of the cylinder 6, and an arc-shaped activated carbon plate 10 is provided on the top side of the cylinder 6. The edge of the activated carbon plate 10 is detachably installed on the cylinder 6. The gas that has not been fully reacted in the exhaust gas will come into contact with the activated carbon plate 10, so that the activated carbon plate 10 can adsorb the residual harmful gases in the exhaust gas. In conjunction with the reaction treatment of the exhaust gas, that is, the exhaust gas is pre-treated before the activated carbon plate 10 comes into contact with the exhaust gas, thereby reducing the usage rate of the activated carbon plate 10 in the absorption tank. In addition, the exhaust gas can be evenly distributed and come into contact with the activated carbon plate 10 when rotating, thereby improving the service life of the activated carbon plate 10 and reducing the replacement frequency of the activated carbon plate 10.

[0038] Specifically, such as Figure 1 and Figure 5 As shown, a hollow annular seat 29 is provided below the upper cover 2. Several air inlets 30 are arranged at intervals at the bottom of the annular seat 29. The top of the annular seat 29 is connected to the inlet of the air pump 31 through a conduit. The air pump 31 is installed on the top of the upper cover 2, and an exhaust pipe 32 is installed at the outlet of the air pump 31. When the air pump 31 is in operation, the completely treated exhaust gas can be extracted from the absorption tank to realize the exhaust gas discharge. The air pump 31's extraction of air from the absorption tank also allows the exhaust gas to pass through the activated carbon plate 10 more quickly and be discharged, thus accelerating the absorption and treatment of the exhaust gas.

[0039] A control cabinet 33 is installed on the outer wall of one of the arc plates 1. The control cabinet 33 contains a controller. The controller is connected to the drive motor 21, the air pump 31, the heating plate 27, and the temperature sensor 28 through wires. In actual use, the controller is one of the following: PLC logic controller, control host, or control motherboard.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tail gas absorption device for the production of isooctyl acrylate, characterized in that: The absorption tank includes a cylinder (6) inside the absorption tank. The bottom of the cylinder (6) is fixed on a first support (7). A waste discharge pipe (11) is coaxially installed on the bottom of the first support (7). The waste discharge pipe (11) passes through the bottom of the absorption tank and is rotatably connected to it. A valve (13) is installed at the bottom of the waste discharge pipe (11). An air inlet pipe (12) is provided inside the waste discharge pipe (11). One end of the air inlet pipe (12) extends upward and is equipped with an air outlet pipe (15). Multiple air outlets are provided on the air outlet pipe (15). The other end of the air inlet pipe (12) passes through the side wall of the waste discharge pipe (11). A branch pipe (14) is installed on the side of the air inlet pipe (12) away from the air outlet pipe (15). A second support base (9) is fixed at the top of the cylinder (6). A connecting pipe (16) is coaxially installed at the top of the second support base (9). The connecting pipe (16) passes through the top of the absorption tank and is rotatably connected to the feeding pipe (17). The connecting pipe (16) is rotatably connected to the top of the absorption tank. A drive mechanism that drives the connecting pipe (16) to rotate is installed on the top of the connecting pipe (16). Multiple slots (8) are provided on the top side wall of the cylinder (6) at intervals, and an arc-shaped activated carbon plate (10) is provided on the top side of the cylinder (6). The edge of the activated carbon plate (10) can be detachably installed on the cylinder (6).

2. The tail gas absorption device for producing isooctyl acrylate according to claim 1, characterized in that: The absorption tank includes two opposing arc-shaped plates (1). An upper cover (2) and a bottom cover (3) are respectively provided at the upper and lower ends of the arc-shaped plates (1). A first connecting seat (4) is installed along the edge of the arc-shaped plates (1), and a second connecting seat (5) is installed along the edge of the upper cover (2) near the arc-shaped plates (1) and along the edge of the bottom cover (3) near the arc-shaped plates (1). The two arc-shaped plates (1), the upper cover (2) and the arc-shaped plates (1), and the bottom cover (3) and the arc-shaped plates (1) are all fixed by fasteners. Among them, the waste discharge pipe (11) is rotatably connected to the bottom cover (3), and the connecting pipe (16) is rotatably connected to the top cover (2).

3. The tail gas absorption device for producing isooctyl acrylate according to claim 2, characterized in that: The drive mechanism includes a first gear (18), which is coaxially mounted on the top of the connecting pipe (16). A second gear (19) meshes with the side of the first gear (18). A drive shaft (20) is coaxially mounted on the second gear (19). The bottom of the drive shaft (20) is rotatably mounted on the upper cover (2), and the other end of the drive shaft (20) is connected to a drive motor (21). The drive motor (21) is fixed to the upper cover (2) by a bracket.

4. The tail gas absorption device for producing isooctyl acrylate according to claim 3, characterized in that: A hollow annular seat (29) is provided below the top cover (2). Several air inlets (30) are arranged at intervals at the bottom of the annular seat (29). The top of the annular seat (29) is connected to the inlet of the air pump (31) through a conduit. The air pump (31) is installed on the top of the top cover (2), and an exhaust pipe (32) is installed at the outlet of the air pump (31).

5. The tail gas absorption device for producing isooctyl acrylate according to claim 4, characterized in that: A stirring shaft (23) is provided inside the cylinder (6), and stirring blades (24) are installed on the side of the stirring shaft (23). The top of the stirring shaft (23) is fixed to the bottom of the connecting pipe (16) by at least two spaced connecting rods (22). Spiral blades (25) are installed on the inner wall of the bottom of the cylinder (6), which drive the material at the bottom of the cylinder (6) to be conveyed upward when the cylinder (6) rotates.

6. The tail gas absorption device for producing isooctyl acrylate according to claim 5, characterized in that: A flow guide seat (26) with an annular shape and an inclined top surface is provided at the bottom of the cylinder (6). The side wall of the flow guide seat (26) is fixed to the inner wall of the cylinder (6), and the flow guide seat (26) is fixed on the top of the first support seat (7). A heating plate (27) is installed on the top surface of the flow guide seat (26), and a temperature sensor (28) is installed at the bottom of the second support seat (9).

7. The tail gas absorption device for producing isooctyl acrylate according to claim 6, characterized in that: A control cabinet (33) is installed on the outer wall of one of the arc-shaped plates (1). A controller is installed inside the control cabinet (33). The controller is connected to the drive motor (21), air pump (31), heating plate (27), and temperature sensor (28) respectively through wires.

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