Device and method for recovering butadiene in tail gas of emulsion polymerized styrene-butadiene rubber production equipment

Abstract

The invention relates to the technical field of tail gas recovery, and discloses a device and a method for recovering butadiene in tail gas of emulsion polymerized styrene-butadiene rubber production equipment.The device comprises a treatment tank, a recovery tank arranged on one side of the treatment tank, a feeding pipe arranged on one side of the treatment tank, and a plurality of supporting discs fixedly connected to the interior of the recovery tank, activated carbon and an oil mist assembly are fixedly connected to the interiors of the multiple supporting discs, and the supporting discs are arranged in the treatment tank; through the use of the oil mist assembly, the gas inlet pipe is connected with an external gas source, gas enters the conical barrel through the fixing disc and the gas outlet pipe, then the gas spirally descends in the conical barrel, after tail gas enters the conical barrel, oil mist and solid particles in the tail gas are gathered in the conical barrel through the spirally descending gas, and the tail gas enters the conical barrel. Therefore, when the tail gas is in contact with the activated carbon, the activated carbon cannot be blocked by the oil mist and the solid particles, so that the activated carbon is prevented from being damaged, and the effect of avoiding damage is achieved.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas recovery technology, specifically to a device and method for recovering butadiene from the exhaust gas of emulsion styrene-butadiene rubber production equipment. Background Technology

[0002] Emulsion styrene-butadiene rubber (ESBR), as one of the oldest, most technologically mature, and highest-volume synthetic rubber varieties, is a high-molecular-weight elastomer mainly produced by emulsion polymerization of butadiene and styrene monomers. It has excellent wear resistance, good heat resistance and aging resistance, low price, stable quality, good processing performance and smoothness. However, the production process of emulsion styrene-butadiene rubber generates a large amount of exhaust gas, which contains butadiene. Therefore, it is necessary to recycle and reuse butadiene.

[0003] CN104923034A discloses a method for recovering butadiene from the tail gas of an emulsion styrene-butadiene rubber (ESBR) production unit. The method includes the following steps: the tail gas, rich in butadiene and containing small amounts of nitrogen and oxygen, is subjected to mass and heat transfer with low-temperature lean aviation kerosene at 13±3℃ in a packed tower at a pressure of 0.28±0.04 MPa. The butadiene is fully absorbed. The enriched aviation kerosene, after butadiene absorption, is then flash-evaporated at 50±2℃ and -0.073±0.007 MPa to remove the butadiene. The flash-evaporated lean aviation kerosene is cooled by liquid ammonia and returned to the packed tower for recycling. This application is used for butadiene absorption in the tail gas of an EBR production unit. After absorption, the butadiene content in the exhaust gas is less than 3%, and the butadiene recovery efficiency is over 90%.

[0004] Although the aforementioned applications and prior art can improve the utilization rate of recovered butadiene and reduce kerosene consumption, when recovering butadiene from exhaust gas, the exhaust gas contains a large amount of oil mist and solid particles. Therefore, when using activated carbon to recover butadiene, the presence of oil mist and solid particles will reduce the adsorption capacity of activated carbon, resulting in the inability to absorb butadiene. Furthermore, when processing oil mist and solid particles, they will accumulate inside the processing equipment, causing damage to the equipment over time. Moreover, when collecting and processing oil mist, oil mist and solid particles will mix together, so further separation is still required. Therefore, this invention proposes a device and method for recovering butadiene from exhaust gas of emulsion polystyrene-butadiene rubber production equipment. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a device and method for recovering butadiene from the exhaust gas of emulsion styrene-butadiene rubber (SBR) production equipment. This method offers advantages such as preventing damage, preventing accumulation, and enabling recycling. It solves the problems of the aforementioned applications and existing technologies in recovering butadiene from exhaust gas. Because the exhaust gas contains a large amount of oil mist and solid particles, the presence of these particles reduces the adsorption capacity of activated carbon, preventing butadiene absorption. Furthermore, during the processing of oil mist and solid particles, these particles accumulate inside the processing equipment, causing damage over time. Additionally, during the collection and processing of oil mist, the oil mist and solid particles mix together, requiring further separation.

[0006] (II) Technical Solution To achieve the aforementioned objectives of avoiding damage, preventing accumulation, and recycling, this invention provides the following technical solution: a butadiene recovery device from the tail gas of emulsion styrene-butadiene rubber production equipment, comprising: a treatment tank and a recovery tank disposed on one side of the treatment tank. A feed pipe is provided on one side of the processing tank. Several support plates are fixedly connected inside the recovery tank, and activated carbon is fixedly connected inside each of the support plates. An oil mist assembly is installed inside the treatment tank to recover oil mist and solid particles in the exhaust gas, preventing the oil mist and solid particles from affecting the recovery of butadiene by activated carbon. The oil mist assembly includes a conical cylinder fixedly connected inside the treatment tank, with one end of the conical cylinder fixedly connected to one end of the feed pipe. An anti-accumulation component is installed inside the treatment tank to prevent solid particles from accumulating on the inner wall of the conical cylinder, thereby affecting the collection of oil mist. A processing component, located inside the processing tank, is used to separate the collected oil mist from solid particles, thereby not affecting the operation of the anti-stacking component.

[0007] Furthermore, the oil mist assembly also includes a fixed plate fixedly connected inside the treatment tank. One end of the fixed plate is fixedly connected to an air inlet pipe, and the end of the fixed plate away from the air inlet pipe is fixedly connected to an air outlet pipe. The end of the air outlet pipe away from the fixed plate is fixedly connected to a conical cylinder. The air inlet pipe has the function of connecting to an external air source, and the air outlet pipe has the function of transporting gas to the inside of the conical cylinder.

[0008] Furthermore, the anti-stacking assembly includes a rotating rod rotatably connected inside a fixed disk. Several rotating blades are fixedly connected to the surface of the rotating rod and inside the fixed disk. A rotating disk is fixedly connected to one end of the rotating rod, and a fixed rod is fixedly connected to the end of the rotating disk away from the rotating rod. A tension strip is rotatably connected to the surface of the fixed rod, and a pressing disk is hinged to the bottom of the tension strip. The rotating blades drive the rotating rod to rotate, the rotating rod drives the rotating disk to rotate, the rotating disk drives the fixed rod to rotate, the fixed rod drives the tension strip to move up and down, and the tension strip reciprocates the pressing disk.

[0009] Furthermore, the anti-stacking assembly also includes a liquid tank fixedly connected inside the processing tank. A fixed cylinder is fixedly connected inside the liquid tank. The squeezing disc is slidably connected inside the fixed cylinder. An extension pipe is fixedly connected to the bottom of the fixed cylinder. A first one-way valve is provided on the surface of the extension pipe. The squeezing disc has the function of extracting liquid. The extension pipe has the function of transporting liquid from inside the liquid tank to inside the fixed cylinder. The fixed cylinder has the function of transporting liquid to inside the storage tank.

[0010] Furthermore, a liquid storage cylinder is fixedly connected to the top of the liquid tank, and the liquid storage cylinder and the fixed cylinder are connected by a delivery pipe. A second one-way valve is provided on the surface of the delivery pipe near the fixed cylinder.

[0011] Furthermore, the anti-stacking assembly also includes a liquid outlet ring fixedly connected inside the conical cylinder. The bottom of the liquid outlet ring is fixedly connected to several nozzles, which are inclined. The liquid outlet ring is connected to the liquid storage cylinder through a liquid outlet pipe. The nozzles are configured to allow the sprayed liquid to form a complete water curtain on the inner wall of the conical cylinder.

[0012] Furthermore, the processing component includes a support rod fixedly connected to the bottom of the conical cylinder, a collection tray fixedly connected to the top of the support rod, a connecting cylinder fixedly connected to the bottom of the collection tray, a support platform fixedly connected inside the connecting cylinder, and the connecting cylinder and the liquid tank connected through a collection pipe. The collection tray has the function of collecting oil mist and solid particles.

[0013] Furthermore, an auxiliary rod is fixedly connected to the top of the support platform, a blocking block is fixedly connected to the top of the auxiliary rod, a floating ball is slidably connected to the surface of the auxiliary rod, and a filter cylinder is fixedly connected to the bottom of the floating ball. The support platform supports the auxiliary rod, the auxiliary rod facilitates the movement of the floating ball, and the blocking block prevents the floating ball from moving excessively.

[0014] Furthermore, the surface of the processing tank is provided with a control panel, the conical cylinder is connected to the recycling tank through a discharge pipe, and the bottom of the recycling tank is provided with a collection hole.

[0015] This invention also provides a method for recovering butadiene from the exhaust gas of emulsion styrene-butadiene rubber production equipment, the butadiene recovery method specifically including the following steps: Step 1: The exhaust gas is fed into the conical cylinder through the feed pipe, and the oil mist and solid particles in the exhaust gas are collected inside the conical cylinder by the oil mist assembly. Step 2: When the oil mist component is in operation, the anti-accumulation component is driven synchronously to form a liquid flow wall on the inner wall of the cone, thereby preventing solid particles from accumulating on the inner wall of the cone. Step 3: After the oil mist and solid particles are collected together by the anti-stallization component, the oil mist and solid particles are separated by the processing component so that the oil mist can be utilized by the anti-stallization component. Step 4: After the exhaust gas is treated by the oil mist assembly, it enters the inside of the recovery tank through the discharge pipe, so that the activated carbon can adsorb and recover the butadiene in the exhaust gas.

[0016] (III) Beneficial Effects Compared with the prior art, the present invention provides a device and method for recovering butadiene from the tail gas of emulsion styrene-butadiene rubber production equipment, which has the following beneficial effects: 1. The device and method for recovering butadiene from the tail gas of the emulsion polystyrene-butadiene rubber production equipment utilizes an oil mist assembly. The inlet pipe is connected to an external gas source, and the gas enters the interior of a conical cylinder through a fixed plate and an outlet pipe. The gas then spirals downward inside the conical cylinder. When the tail gas enters the conical cylinder, the spiraling gas collects the oil mist and solid particles in the tail gas inside the conical cylinder. Since the oil mist and solid particles in the tail gas are treated, when the tail gas comes into contact with activated carbon, the oil mist and solid particles will no longer clog the activated carbon, thereby avoiding damage to the activated carbon and achieving the effect of preventing damage.

[0017] 2. The butadiene recovery device and method in the tail gas of the emulsion polystyrene-butadiene rubber production equipment utilizes the combined use of an oil mist component and an anti-stacking component. When the gas enters the fixed plate, the gas drives the rotating rod to rotate via the rotating blades. The rotating rod then drives the fixed rod to rotate via the rotating plate. Consequently, the fixed rod drives the extrusion plate to reciprocate inside the fixed cylinder via the tension strip. This allows the liquid inside the liquid tank to enter the fixed cylinder through the extension pipe, and then through the conveying pipe into the storage tank. When the storage tank is full of liquid, the liquid enters the outlet ring through the outlet pipe and is sprayed out. The sprayed liquid forms a liquid flow water curtain on the inner wall of the conical cylinder. When solid particles accumulate inside the conical cylinder, the flowing liquid prevents the solid particles from accumulating, thus achieving the effect of preventing accumulation.

[0018] 3. The device and method for recovering butadiene from the tail gas of the emulsion polystyrene-butadiene rubber production equipment, through the combined use of anti-stacking components and treatment components, when oil mist and solid particles are washed down by the flowing water curtain, the oil mist and solid particles fall into the inside of the recovery pan. When the liquid level inside the recovery pan rises, the floating ball rises on the surface of the auxiliary rod under the action of the liquid surface, which in turn drives the filter cylinder to rise. Due to the obstruction of the filter cylinder, the liquid inside the recovery pan flows back to the inside of the liquid tank through the connecting cylinder and the recovery pipe, thereby achieving the effect of recycling.

[0019] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional three-dimensional structural diagram of the processing tank of the present invention; Figure 3 This is a cross-sectional perspective view of the three-dimensional structure of the recycling tank of the present invention; Figure 4 This is a three-dimensional schematic diagram of the internal structure of the processing tank of the present invention; Figure 5 This is a three-dimensional schematic diagram of the internal structure of the treatment tank of the present invention from another perspective; Figure 6 This is a three-dimensional structural diagram of the oil mist assembly of the present invention; Figure 7 This is a cross-sectional three-dimensional structural diagram of the conical cylinder of the present invention; Figure 8 This is a three-dimensional structural diagram of the anti-stack component of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the rotating rod of the present invention; Figure 10 This is a cross-sectional perspective view of the three-dimensional structure of the fixed disk of the present invention; Figure 11 This is a three-dimensional structural diagram of the fixed cylinder and the liquid storage cylinder of the present invention; Figure 12 This is a schematic diagram of the three-dimensional structure of the processing component of the present invention; Figure 13 This is a cross-sectional three-dimensional structural diagram of the connecting cylinder of the present invention.

[0021] In the diagram: 1. Processing tank; 11. Control panel; 12. Feed pipe; 13. Recovery tank; 131. Discharge pipe; 132. Support plate; 133. Activated carbon; 134. Collection hole; 2. Oil mist assembly; 21. Conical cylinder; 22. Air inlet pipe; 221. Fixed plate; 222. Air outlet pipe; 3. Anti-stacking assembly; 31. Rotating rod; 311. Rotating blade; 312. Rotating plate; 313. Fixed rod; 314. Stretching bar; 315. Extrusion... 32. Pressure plate; 32. Liquid tank; 321. Fixed cylinder; 322. Extension pipe; 323. First check valve; 33. Delivery pipe; 331. Second check valve; 34. Liquid storage tank; 341. Liquid outlet pipe; 342. Liquid outlet ring; 4. Processing assembly; 41. Support rod; 411. Recovery tray; 42. Connecting cylinder; 421. Support platform; 422. Recovery pipe; 43. Auxiliary rod; 431. Blocking block; 432. Floating ball; 433. Filter cylinder. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0024] For a specific implementation example, please refer to Implementation Example 1. Figures 1 to 3 A butadiene recovery device for the tail gas of emulsion styrene-butadiene rubber production equipment includes: a treatment tank 1 and a recovery tank 13 disposed on one side of the treatment tank 1. The feed pipe 12 is set on one side of the processing tank 1. Several support plates 132 are fixedly connected inside the recovery tank 13. Activated carbon 133 is fixedly connected inside each of the support plates 132. A control panel 11 is set on the surface of the processing tank 1. The conical cylinder 21 is connected to the recovery tank 13 through the discharge pipe 131. A collection hole 134 is opened at the bottom of the recovery tank 13. Oil mist assembly 2 is installed inside the treatment tank 1 to recover oil mist and solid particles in the exhaust gas, so as to avoid the oil mist and solid particles affecting the recovery of butadiene by activated carbon 133. Oil mist assembly 2 includes a conical cylinder 21 fixedly connected inside the treatment tank 1, and one end of the conical cylinder 21 is fixedly connected to one end of the feed pipe 12. Anti-accumulation component 3 is installed inside the treatment tank 1 to prevent solid particles from accumulating on the inner wall of the conical cylinder 21, thereby affecting the collection of oil mist; The processing component 4 is located inside the processing tank 1 and is used to separate the collected oil mist from the solid particles, so as not to affect the operation of the anti-stacking component 3. It should be noted that a processing tube is fixedly connected to the bottom of the collection hole 134, and a solenoid valve is provided on the surface of the processing tube. A heating tube is provided inside the recovery tank 13. The temperature inside the recovery tank 13 is raised by the heating tube, so that the butadiene inside the activated carbon 133 can be separated. When it is necessary to recover butadiene from the exhaust gas of the emulsion polystyrene-butadiene rubber production equipment, the exhaust gas is transported to the interior of the oil mist component 2 through the feed pipe 12. The oil mist component 2 removes the oil mist and solid particles in the exhaust gas. The treated exhaust gas enters the recovery tank 13 through the discharge pipe 131. Then, the activated carbon 133 adsorbs the butadiene in the exhaust gas, so that the butadiene is adsorbed into the interior of the activated carbon 133. For a specific embodiment two, please refer to Figures 1 to 3 Based on the butadiene recovery device in the tail gas of the emulsion polystyrene-butadiene rubber production equipment provided in Specific Embodiment 1, this embodiment provides a further technical solution: The oil mist assembly 2 also includes a fixed plate 221 fixedly connected inside the treatment tank 1. One end of the fixed plate 221 is fixedly connected to an air inlet pipe 22, and the other end of the fixed plate 221 away from the air inlet pipe 22 is fixedly connected to an air outlet pipe 222. The other end of the air outlet pipe 222 away from the fixed plate 221 is fixedly connected to a conical cylinder 21. When it is necessary to treat the oil mist and solid particles in the exhaust gas, the intake pipe 22 is connected to an external air source. The gas enters the interior of the conical cylinder 21 through the fixed plate 221 and the exhaust pipe 222, and then the gas spirals down inside the conical cylinder 21. When the exhaust gas enters the interior of the conical cylinder 21, the spiraling gas gathers the oil mist and solid particles in the exhaust gas on the inner wall of the conical cylinder 21. Since the oil mist and solid particles in the exhaust gas gather on the inner wall of the conical cylinder 21, when the exhaust gas comes into contact with the activated carbon 133, the oil mist and solid particles will no longer clog the activated carbon 133, thereby avoiding damage to the activated carbon 133. For a specific embodiment three, please refer to Figures 1 to 3 Based on the butadiene recovery device in the tail gas of the emulsion polystyrene-butadiene rubber production equipment provided in Specific Embodiment 2, this embodiment provides a further technical solution: The anti-stacking assembly 3 includes a rotating rod 31 rotatably connected inside a fixed disk 221. Several rotating blades 311 are fixedly connected to the surface of the rotating rod 31 and inside the fixed disk 221. A rotating disk 312 is fixedly connected to one end of the rotating rod 31, and a fixed rod 313 is fixedly connected to the end of the rotating disk 312 away from the rotating rod 31. A tension strip 314 is rotatably connected to the surface of the fixed rod 313, and a compression disc 315 is hinged to the bottom of the tension strip 314. The anti-stacking assembly 3 also includes a liquid tank 32 fixedly connected inside the processing tank 1. A fixed cylinder 321 is fixedly connected inside the liquid tank 32, and the compression disc 315 is slidably connected to the fixed cylinder 321. Inside the conical cylinder 21, the bottom of the fixed cylinder 321 is fixedly connected to an extension pipe 322, and the surface of the extension pipe 322 is provided with a first one-way valve 323. The top of the liquid tank 32 is fixedly connected to a liquid storage cylinder 34, and the liquid storage cylinder 34 is connected to the fixed cylinder 321 through a conveying pipe 33. The surface of the conveying pipe 33 near the fixed cylinder 321 is provided with a second one-way valve 331. The anti-stacking assembly 3 also includes a liquid outlet ring 342 fixedly connected inside the conical cylinder 21. The bottom of the liquid outlet ring 342 is fixedly connected to several nozzles, and the several nozzles are inclined. The liquid outlet ring 342 is connected to the liquid storage cylinder 34 through a liquid outlet pipe 341. It should be noted that when the extrusion plate 315 rises, the first one-way valve 323 is in the open state, while the second one-way valve 331 is in the closed state. Therefore, the liquid inside the liquid tank 32 can enter the interior of the fixed cylinder 321 through the extension pipe 322. When the extrusion plate 315 falls, the first one-way valve 323 is in the closed state, while the second one-way valve 331 is in the open state. Therefore, the liquid inside the fixed cylinder 321 can enter the liquid storage cylinder 34 through the delivery pipe 33. The air blown out by the vent pipe 222 will not blow away the surface of the water curtain formed by the liquid. When it is necessary to prevent solid particles from accumulating on the inner wall of the conical cylinder 21, when gas enters the fixed disk 221, the gas drives the rotating rod 31 to rotate through the rotating blade 311, which in turn drives the fixed rod 313 to rotate through the rotating disk 312. As a result, the fixed rod 313 drives the extrusion disk 315 to reciprocate inside the fixed cylinder 321 through the tension bar 314. This allows the liquid inside the liquid tank 32 to enter the interior of the fixed cylinder 321 through the extension pipe 322, and then enter the interior of the storage cylinder 34 through the delivery pipe 33. When the storage cylinder 34 is full of liquid, the liquid enters the outlet ring 342 through the outlet pipe 341 and is then sprayed out. The sprayed liquid forms a liquid flow water curtain on the inner wall of the conical cylinder 21. When solid particles accumulate inside the conical cylinder 21, the flowing liquid can prevent solid particles from accumulating on the inner wall of the conical cylinder 21. For a specific implementation example, please refer to Implementation Example 4. Figures 1 to 3 Based on the butadiene recovery device in the tail gas of the emulsion polystyrene-butadiene rubber production equipment provided in Specific Embodiment 3, this embodiment provides a further technical solution: The processing component 4 includes a support rod 41 fixedly connected to the bottom of the conical cylinder 21. A recovery tray 411 is fixedly connected to the top of the support rod 41. A connecting cylinder 42 is fixedly connected to the bottom of the recovery tray 411. A support platform 421 is fixedly connected inside the connecting cylinder 42. The connecting cylinder 42 is connected to the liquid tank 32 through a recovery pipe 422. An auxiliary rod 43 is fixedly connected to the top of the support platform 421. A blocking block 431 is fixedly connected to the top of the auxiliary rod 43. A floating ball 432 is slidably connected to the surface of the auxiliary rod 43. A filter cylinder 433 is fixedly connected to the bottom of the floating ball 432. It should be noted that when the liquid level inside the recovery tray 411 drops, the floating ball 432 drives the filter cylinder 433 to drop, so that the solid particles on the surface of the filter cylinder 433 can be scraped off. When it is necessary to separate oil mist from solid particles, after the oil mist and solid particles are washed down by the flowing water curtain, they fall into the inside of the recovery tray 411, causing the liquid level inside the recovery tray 411 to rise. As the liquid level inside the recovery tray 411 rises, the floating ball 432 rises on the surface of the auxiliary rod 43 under the influence of the liquid level, which in turn causes the floating ball 432 to drive the filter cylinder 433 to rise. Due to the obstruction of the filter cylinder 433, the liquid inside the recovery tray 411 flows back to the inside of the liquid tank 32 through the connecting cylinder 42 and the recovery pipe 422, thereby separating the oil mist from the solid particles. In a specific embodiment five, the present invention also provides a method for recovering butadiene from the exhaust gas of emulsion styrene-butadiene rubber production equipment. This butadiene recovery method specifically includes the following steps: Step 1: The exhaust gas is conveyed to the conical cylinder 21 through the feed pipe 12, and the oil mist and solid particles in the exhaust gas are collected inside the conical cylinder 21 by the oil mist assembly 2. Step 2: When the oil mist component 2 is in operation, the anti-accumulation component 3 is driven synchronously to form a liquid flow wall on the inner wall of the conical cylinder 21, thereby preventing solid particles from accumulating on the inner wall of the conical cylinder 21. Step 3: After the oil mist and solid particles are collected together by the anti-stacking component 3, the oil mist and solid particles are separated by the processing component 4 so that the oil mist can be utilized by the anti-stacking component 3. Step 4: After the exhaust gas is treated by the oil mist component 2, it enters the interior of the recovery tank 13 through the discharge pipe 131, so that the activated carbon 133 can adsorb and recover the butadiene in the exhaust gas.

[0025] Working principle: In use, the inlet pipe 22 is connected to an external air source. Gas enters the conical cylinder 21 through the fixed plate 221 and the outlet pipe 222, causing the gas to spiral downwards inside the conical cylinder 21. When the exhaust gas enters the conical cylinder 21, the spiraling gas collects oil mist and solid particles in the exhaust gas on the inner wall of the conical cylinder 21. Because the oil mist and solid particles in the exhaust gas collect on the inner wall of the conical cylinder 21, when the exhaust gas comes into contact with the activated carbon 133, the oil mist and solid particles will no longer clog the activated carbon 133, thus avoiding damage to the activated carbon 133. (Note: The last sentence about styrene-butadiene emulsion seems unrelated and likely refers to a different topic.) When recovering butadiene from the exhaust gas of rubber production equipment, the exhaust gas is conveyed to the interior of the oil mist assembly 2 through the feed pipe 12. The oil mist assembly 2 removes oil mist and solid particles from the exhaust gas. The treated exhaust gas enters the recovery tank 13 through the discharge pipe 131. Then, the activated carbon 133 adsorbs the butadiene in the exhaust gas, causing the butadiene to be adsorbed into the interior of the activated carbon 133. To prevent solid particles from accumulating on the inner wall of the conical cylinder 21, when the gas enters the fixed disk 221, the gas drives the rotating rod 31 to rotate through the rotating blade 311, causing the rotating rod 31 to drive the solid particles through the rotating disk 312. The fixed rod 313 rotates, causing the pressing disc 315 to reciprocate inside the fixed cylinder 321 via the tension bar 314. This allows the liquid inside the liquid tank 32 to enter the fixed cylinder 321 through the extension pipe 322, and then through the delivery pipe 33 into the storage cylinder 34. When the storage cylinder 34 is full, the liquid enters the outlet ring 342 through the outlet pipe 341 and is sprayed out, forming a liquid flow curtain on the inner wall of the conical cylinder 21. When solid particles accumulate inside the conical cylinder 21, the flowing liquid prevents the solid particles from accumulating in the conical cylinder. When it is necessary to separate oil mist from solid particles at the inner wall of cylinder 21, after the oil mist and solid particles are washed down by the flowing water curtain, they fall into the inside of the recovery tray 411, causing the liquid level inside the recovery tray 411 to rise. As the liquid level inside the recovery tray 411 rises, the floating ball 432 rises on the surface of the auxiliary rod 43 under the influence of the liquid level, which in turn causes the floating ball 432 to drive the filter cylinder 433 to rise. Due to the obstruction of the filter cylinder 433, the liquid inside the recovery tray 411 flows back to the inside of the liquid tank 32 through the connecting cylinder 42 and the recovery pipe 422, thereby separating the oil mist from the solid particles.

[0026] Any content not described in detail in this specification is prior art known to those skilled in the art.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Parallelism: The parallelism defined in this application is not limited to absolute parallelism. This definition of parallelism can be understood as basic parallelism. It allows for situations where the parallelism is not absolute due to factors such as assembly tolerance, design tolerance, and structural flatness. It also allows for errors within a small angular range, such as within 10 degrees of assembly error. These can all be considered as parallel relationships.

[0029] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for recovering butadiene from off-gas of a production plant for emulsion polymerized styrene-butadiene rubber, comprising: The processing tank (1) and the recovery tank (13) arranged on one side of the processing tank (1) are characterized in that: The feeding pipe (12) is arranged on one side of the processing tank (1), and the inside of the recovery tank (13) is fixedly connected with a plurality of supporting discs (132), and the inside of each of the supporting discs (132) is fixedly connected with activated carbon (133); The oil mist assembly (2) is arranged in the inside of the processing tank (1) and is used for recovering oil mist and solid particles in tail gas, so as to avoid the influence of the oil mist and the solid particles on the recovery of butadiene by the activated carbon (133), the oil mist assembly (2) comprises a conical cylinder (21) fixedly connected in the inside of the processing tank (1), and one end of the conical cylinder (21) is fixedly communicated with one end of the feeding pipe (12); The anti-piling assembly (3) is arranged in the inside of the processing tank (1) and is used for preventing the solid particles from piling up on the inner wall of the conical cylinder (21), so as to avoid the influence on the operation of the anti-piling assembly (3); The processing assembly (4) is arranged in the inside of the processing tank (1) and is used for separating the collected oil mist from the solid particles, so as to avoid the influence on the operation of the anti-piling assembly (3).

2. The recovery device of butadiene in the tail gas of emulsion polymerized styrene butadiene rubber production equipment according to claim 1, characterized in that: The oil mist assembly (2) further comprises a fixed disc (221) fixedly connected in the inside of the processing tank (1), one end of the fixed disc (221) is fixedly communicated with an air inlet pipe (22), the end, away from the air inlet pipe (22), of the fixed disc (221) is fixedly communicated with an air outlet pipe (222), and the end, away from the fixed disc (221), of the air outlet pipe (222) is fixedly communicated with the conical cylinder (21).

3. The recovery device of butadiene in the tail gas of emulsion polymerized styrene butadiene rubber production equipment according to claim 2, characterized in that: The anti-piling assembly (3) comprises a rotating rod (31) rotatably connected in the inside of the fixed disc (221), a plurality of rotating blades (311) are fixedly connected to the surface of the rotating rod (31) and located in the inside of the fixed disc (221), one end of the rotating rod (31) is fixedly connected with a rotating disc (312), the end, away from the rotating rod (31), of the rotating disc (312) is fixedly connected with a fixed rod (313), the surface of the fixed rod (313) is rotatably connected with a stretching strip (314), and the bottom of the stretching strip (314) is hingedly connected with a pressing disc (315).

4. The recovery device of butadiene in the tail gas of emulsion polymerized styrene butadiene rubber production equipment according to claim 3, characterized in that: The anti-piling assembly (3) further comprises a liquid tank (32) fixedly connected in the inside of the processing tank (1), a fixed cylinder (321) is fixedly connected in the inside of the liquid tank (32), the pressing disc (315) is slidingly connected in the inside of the fixed cylinder (321), the bottom of the fixed cylinder (321) is fixedly communicated with an extension pipe (322), and the surface of the extension pipe (322) is provided with a first one-way valve (323).

5. The recovery device of butadiene in the tail gas of emulsion polymerized styrene butadiene rubber production equipment according to claim 4, characterized in that: The top of the liquid tank (32) is fixedly connected with a liquid storage cylinder (34), the liquid storage cylinder (34) and the fixed cylinder (321) are communicated through a conveying pipe (33), and the surface of the end, close to the fixed cylinder (321), of the conveying pipe (33) is provided with a second one-way valve (331).

6. The recovery device of butadiene in the tail gas of emulsion polymerized styrene butadiene rubber production equipment according to claim 5, characterized in that: The anti-piling assembly (3) further comprises a liquid outlet ring (342) fixedly connected inside the conical cylinder (21), the bottom of the liquid outlet ring (342) is fixedly communicated with a plurality of spray heads, the plurality of spray heads are inclinedly arranged, and the liquid outlet ring (342) is communicated with the liquid storage cylinder (34) through a liquid outlet pipe (341).

7. The recovery device of butadiene in the tail gas of emulsion polymerized styrene butadiene rubber production equipment according to claim 4, characterized in that: The processing assembly (4) comprises a supporting rod (41) fixedly connected to the bottom of the conical cylinder (21), the top of the supporting rod (41) is fixedly connected with a recovery disc (411), the bottom of the recovery disc (411) is fixedly communicated with a connecting cylinder (42), the inside of the connecting cylinder (42) is fixedly connected with a supporting table (421), and the connecting cylinder (42) is communicated with the liquid tank (32) through a recovery pipe (422).

8. The recovery device of butadiene in the tail gas of emulsion polymerized styrene butadiene rubber production equipment according to claim 7, characterized in that: The top of the supporting table (421) is fixedly connected with an auxiliary rod (43), the top of the auxiliary rod (43) is fixedly connected with a blocking block (431), the surface of the auxiliary rod (43) is slidably connected with a floating ball (432), and the bottom of the floating ball (432) is fixedly connected with a filter cylinder (433).

9. The recovery device of butadiene in the tail gas of emulsion polymerized styrene butadiene rubber production equipment according to claim 1, characterized in that: The surface of the processing tank (1) is provided with a control panel (11), the conical cylinder (21) is communicated with the recovery tank (13) through a discharge pipe (131), and the bottom of the recovery tank (13) is provided with a collecting hole (134).

10. Process for the recovery of butadiene from the off-gas of a production plant for emulsion polymerized styrene-butadiene rubber, characterized in that: The emulsion polymerization butadiene rubber production equipment tail gas recovery device of any one of claims 1-9, the butadiene recovery method specifically comprises the following steps: Step 1, the tail gas is conveyed into the conical cylinder (21) through the feed pipe (12), and the oil mist and solid particles in the tail gas are collected in the inside of the conical cylinder (21) by the oil mist assembly (2); Step 2, the anti-piling assembly (3) is synchronously driven when the oil mist assembly (2) is operated, so that a liquid flow wall is formed on the inner wall of the conical cylinder (21), thereby avoiding the accumulation of solid particles on the inner wall of the conical cylinder (21); Step 3, after the oil mist and solid particles are collected together by the anti-piling assembly (3), the oil mist and solid particles are separated by the processing assembly (4), so that the oil mist can be utilized by the anti-piling assembly (3); Step 4, after the tail gas is treated by the oil mist assembly (2), the tail gas enters the inside of the recovery tank (13) through the discharge pipe (131), so that the activated carbon (133) adsorbs and recovers butadiene in the tail gas.

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