Tail gas drying device based on sorbic acid production process

Abstract

The invention relates to the technical field of air pollution prevention and control, and discloses a tail gas drying device based on sorbic acid production process, which comprises two groups of drying tanks which alternately operate, the two groups of drying tanks are respectively used as an adsorption tank and a desorption tank, a drying inner cylinder penetrates through the tanks, and an interlayer cavity is enclosed by a first separation assembly and a second separation assembly in the cylinder; the interior is divided into three groups of adsorbent bed layers; the lifting assembly drives the second separation assembly to ascend and descend, and the bed space, the cavity volume and the air outlet size can be dynamically adjusted according to the swelling and shrinking state of an adsorbent in the early and later periods of desorption, so that the problems that an existing drying tank is large in flow resistance due to direct filling of the adsorbent and poor in desorption efficiency are solved; layered design and cavity blocking reduce airflow resistance, secondary adsorption of the lower layer is avoided, sufficient desorption is guaranteed through dynamic adjustment, the desorption efficiency can be improved, the period is shortened, the service life of an adsorbent is prolonged, and continuous and stable tail gas drying is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of air pollution control technology, and in particular to a tail gas drying device based on the sorbic acid production process. Background Technology

[0002] During the production of sorbic acid, the exhaust gas contains pollutants such as volatile organic compounds and small amounts of acidic components. If these substances are directly released into the atmosphere, they will not only damage regional air quality but may also participate in photochemical reactions to form photochemical smog or combine with water vapor to cause acid precipitation, posing a clear threat to the atmospheric environment and ecosystem. The exhaust gas drying device is not merely an auxiliary process device; its core function is to treat this polluting exhaust gas: by drying and removing excess moisture from the exhaust gas, it can prevent the moisture from carrying pollutants and exacerbating their diffusion, while also creating the necessary conditions for the efficient capture, adsorption, or degradation of subsequent VOCs and other pollutants. This process directly reduces or even blocks the emission pathways of pollutants into the atmosphere, perfectly aligning with the core logic of source reduction, process treatment, and end-of-pipe control in air pollution prevention and control, and thus falls within the scope of air pollution prevention and control.

[0003] Regarding the above and existing related technologies, the inventors believe that: In the existing drying tank structure, the adsorbent is usually placed in the tank by direct filling. When using a hot airflow for desorption, there is a mismatch between airflow and desorption efficiency. In the early stage of desorption, the desiccant has a high adsorbed moisture content and is in a state of water absorption and expansion, resulting in narrow gaps and dense packing between desiccant particles in the tank. The hot airflow needs to overcome a large flow resistance to penetrate the entire packing layer, which not only increases the energy consumption of airflow transportation, but may also affect the local desorption effect due to uneven airflow distribution. In the later stage of desorption, most of the moisture inside the desiccant has been removed, and the particles shrink due to water loss, increasing the gaps between particles. At this time, the flow resistance of the hot airflow is greatly reduced, and it is easy to quickly sweep across the surface along the gaps between particles, making it difficult to effectively penetrate into the internal pores of the desiccant particles. As a result, the residual moisture inside the particles cannot be fully contacted and desorbed, ultimately causing an imbalance in efficiency before and after the desorption process, resulting in unstable overall desorption effect and residual risk. Summary of the Invention

[0004] The technical problem to be solved by this invention is that in existing drying tanks, the adsorbent is directly filled. During desorption, the airflow resistance is high in the early stage due to the desiccant absorbing water and expanding, and in the later stage due to the desiccant losing water and shrinking, making it easy for the airflow to sweep across the surface and difficult to remove the residual moisture inside. This causes an imbalance in desorption efficiency, affecting the desorption and regeneration efficiency, and thus affecting subsequent adsorption. To address this, we propose a tail gas drying device based on the sorbic acid production process.

[0005] To achieve the above objectives, this application adopts the following technical solution: a tail gas drying device based on the sorbic acid production process, comprising: an outer drying tank, wherein two sets of outer drying tanks are arranged side by side, one set of outer drying tanks being an adsorption tank and the other set being a desorption tank, the two sets of outer drying tanks operating alternately, an inner drying cylinder penetrating the interior of the outer drying tank, and an exhaust cavity formed by a partition between the inner drying cylinder and the outer drying tank, a first partition component and a second partition component installed inside the inner drying cylinder, the first partition component and the second partition component being arranged in parallel, and a sandwich cavity formed by a partition between the first partition component and the second partition component, three sets of sandwich cavities arranged at equal intervals about the interior of the inner drying cylinder, dividing the interior of the inner drying cylinder into three sets of adsorbent beds, and an exhaust hole is opened on the side of the inner drying cylinder, the sandwich cavity being connected to the exhaust cavity through the exhaust hole; A lifting assembly is installed on the side of the first separating component. The lifting assembly is used to lower or raise the second separating component. When the second separating component lowers, the space of the adsorbent bed above the second separating component increases, and the volume of the interlayer cavity between the second separating component and the first separating component decreases, and the opening of the air outlet hole narrows. When the second separating component rises, it compresses the adsorbent bed above the second separating component, and the volume of the interlayer cavity between the second separating component and the first separating component increases, and the opening of the air outlet hole increases.

[0006] Preferably, an air outlet pipe is installed at the top of the outer drying tank and is connected to the outer drying tank; an air inlet pipe is installed at the bottom of the outer drying tank and is connected to the outer drying tank; the inner drying cylinder is fixedly connected to the outer drying tank; and a flow divider is fixedly connected to the top of the inner drying cylinder.

[0007] Preferably, a drying air pipe is installed on the side of the air outlet pipe, the drying air pipe is connected to the air outlet pipe, and the bottom end of the drying air pipe extends into the interior of the drying inner cylinder. An air jet valve is installed on the drying air pipe.

[0008] Preferably, the first partition component includes a first fixing plate, which is fixedly connected to the inner wall of the drying inner cylinder. The first fixing plate has a first vent in a ring array inside, and a mesh plate is fixedly connected inside the first vent.

[0009] Preferably, the top of the first fixing plate is fixedly connected to a first annular groove, the inside of the first annular groove is rotatably connected to a first blocking plate, the inside of the first blocking plate is provided with a first alignment port in an annular array, and the inside of the first alignment port is fixedly connected to a mesh plate.

[0010] Preferably, a rotating assembly is installed at the middle position of the first fixed plate. The rotating assembly is used to drive the first blocking plate to rotate. When the first alignment port is aligned with the first vent, the first separating assembly is in the open state. When the first alignment port is misaligned with the first vent, the first separating assembly is in the closed state.

[0011] Preferably, the second partition component includes a second fixing plate, which is slidably connected to the inner wall of the drying inner cylinder. The interior of the second fixing plate is provided with a second air vent in a ring array, and the second air vent and the first air vent are staggered.

[0012] Preferably, a second annular groove is fixedly connected to the bottom of the second fixed plate, and a second blocking plate is rotatably connected inside the second annular groove. A second alignment port is opened inside the second blocking plate. A rotating component is installed in the middle of the second fixed plate to drive the rotation of the second blocking plate. A sealing ring is fixedly connected to the bottom of the second annular groove.

[0013] Preferably, the rotating assembly includes a first motor, and the output end of the first motor is fixedly connected to a gear. The rotating assembly also includes an arc-shaped opening, inside which a serrated rack is provided. The gear is inserted into the inside of the arc-shaped opening, and the gear meshes with the serrated rack.

[0014] Preferably, the lifting assembly includes a second motor, which is mounted on the side of the first partition assembly. The output end of the second motor is fixedly connected to a lead screw, and the lead screw is threadedly connected to a lifting nut, which is fixedly connected to the side of the second partition assembly. The second motor also includes a guide rod, which is fixedly connected to the side of the first partition assembly away from the second motor. The guide rod is slidably connected to a guide cylinder, which is fixedly connected to the side of the second partition assembly.

[0015] The technical effects and advantages of this invention are as follows: This invention features a layered adsorbent design and a barrier design with interlayered cavities, replacing the traditional monolithic filling with multi-layered independent units. This significantly reduces airflow resistance during desorption, avoids uneven airflow distribution and dead zones, ensures full contact between each layer of adsorbent and the dry, hot airflow, and allows the desorbed moisture from the upper layer to be quickly discharged through the cavities, completely blocking secondary adsorption by the unsaturated adsorbent in the lower layer. This significantly improves desorption efficiency and shortens the regeneration cycle. Simultaneously, the dynamic coordination between the second and first separating components adjusts the bed space, interlayer cavities, and vent size according to the expansion or contraction of the adsorbent before and after desorption. This alleviates the resistance surge caused by particle expansion in the early stages, reducing fan power consumption, and fills the excessive gaps created by particle contraction in the later stages, preventing short-circuit surface sweeping by the airflow. This ensures full desorption of residual moisture inside the adsorbent, while reducing adsorbent compression and wear, extending its service life. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a three-dimensional structural diagram of the entire invention; Figure 2 This is a three-dimensional structural diagram of the interior of the drying outer can of the present invention; Figure 3 This is a schematic cross-sectional view of the exhaust cavity portion of the present invention; Figure 4 This is a cross-sectional structural diagram of the first and second separating components of the present invention; Figure 5 This is an exploded structural diagram of the first fixing plate and the second fixing plate of the present invention; Figure 6 This is an exploded structural diagram of the second partition component of the present invention; Figure 7 This is an exploded structural diagram of the first separating component of the present invention; Figure 8 This is a three-dimensional structural diagram of the rotating component of the present invention.

[0017] Legend: 1. Drying outer tank; 2. Jet valve; 3. Drying inner cylinder; 4. Exhaust cavity; 5. First partition assembly; 6. Second partition assembly; 7. Rotating assembly; 8. Lifting assembly; 9. Inlet pipe; 10. Outlet pipe; 11. Drying pipe; 12. Diverter plate; 13. Outlet hole; 501. First fixing plate; 502. First vent; 503. First annular groove; 504. First baffle plate; 505. First alignment port; 601. Second fixing plate; 602. Second vent; 603. Second annular groove; 604. Second baffle plate; 605. Second alignment port; 606. Sealing ring; 701. Arc-shaped opening; 702. Sawtooth rack; 703. Gear; 704. First motor; 801. Second motor; 802. Lead screw; 803. Lifting nut; 804. Guide rod; 805. Guide slide. Detailed Implementation

[0018] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0019] Reference Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a technical solution: a tail gas drying device based on the sorbic acid production process, comprising: an outer drying tank 1, two sets of outer drying tanks 1 arranged side by side, one set of outer drying tanks 1 being an adsorption tank and the other set of outer drying tanks 1 being a desorption tank, the two sets of outer drying tanks 1 operating alternately, an outlet pipe 10 installed on the top of the outer drying tank 1 and connected to the outer drying tank 1, an inlet pipe 9 installed on the bottom of the outer drying tank 1 and connected to the outer drying tank 1, a drying inner cylinder 3 fixedly connected to the outer drying tank 1, and a diverter plate 12 fixedly connected to the top of the drying inner cylinder 3, a drying gas pipe 11 installed on the side of the outlet pipe 10 and connected to the outlet pipe 10, the bottom end of the drying gas pipe 11 extending into the interior of the drying inner cylinder 3, and an air jet valve 2 installed on the drying gas pipe 11.

[0020] Existing drying tanks typically employ a structure design where the adsorbent is directly filled. When using a hot drying airflow for desorption, the airflow must be forced through the entire adsorbent filling layer inside the tank to complete the discharge. However, the natural stacking characteristics of the adsorbent particles, especially in the early stages of desorption, cause the adsorbent to expand due to water absorption, resulting in smaller gaps between particles. This leads to significant resistance to the airflow during the penetration process. Excessive resistance can lead to uneven airflow distribution within the adsorbent layer, with some areas experiencing excessively slow airflow or even dead zones. This prevents the adsorbent in these areas from fully contacting the drying hot airflow, resulting in incomplete desorption and localized moisture residue. Furthermore, to ensure efficient adsorption and drying, the adsorbent in the drying tank typically does not need to reach complete saturation before it begins to desorb. This means that during desorption, the adsorbent material still retains some adsorption capacity. When the upper layer of adsorbent desorbs under the action of the drying hot airflow, the released moisture moves downwards with the airflow and comes into contact with the unsaturated adsorbent in the lower layer, which still possesses adsorption capacity. Since the adsorption active sites of the lower layer adsorbent are not completely occupied, the moisture in the airflow is recaptured and fixed, increasing the desorption pressure on the lower layer adsorbent and affecting the desorption efficiency. To address the aforementioned problems of high airflow resistance during desorption, which affects the uniformity of airflow distribution, and the impact of re-adsorption by the lower layer adsorbent on desorption efficiency, this application proposes the following improvements: Please see Figure 2 and Figure 3As shown, the inner drying cylinder 3 runs through the interior of the outer drying tank 1, and the inner drying cylinder 3 and the outer drying tank 1 are surrounded by a baffle to form an exhaust cavity 4. The inner drying cylinder 3 is equipped with a first partition component 5 and a second partition component 6, which are arranged in parallel. The baffle between the first partition component 5 and the second partition component 6 forms a sandwich cavity. The sandwich cavity is arranged in three sets at equal intervals with respect to the interior of the inner drying cylinder 3, dividing the interior of the inner drying cylinder 3 into three sets of adsorbent beds. The inner drying cylinder 3 is provided with an exhaust hole 13 on its side, and the sandwich cavity is connected to the exhaust cavity 4 through the exhaust hole 13. This application divides the adsorbent inside the tank into multiple layers, separated by interlayer cavities. When using a drying airflow to purge and desorb the adsorbent inside the tank, the process proceeds layer by layer from top to bottom. The moisture purged from each layer enters the interlayer cavity and is discharged through the air outlet 13 and the exhaust cavity 4. The adsorbent is changed from a traditional monolithic filling to multiple independent units, significantly reducing the thickness of each adsorbent layer. The drying airflow does not need to overcome the huge resistance of the monolithic filling layer and only needs to act on a single layer to complete the desorption, resulting in a significant reduction in resistance. At the same time, the single-layer thin structure makes it easier to achieve uniform airflow coverage, avoiding the dead zones or uneven flow rates in the traditional monolithic layer, ensuring that each layer of adsorbent is in full contact with the hot airflow, and effectively avoiding incomplete local desorption.

[0021] Meanwhile, due to the interlayer cavity formed by the first separator 5 and the second separator 6 between each layer of adsorbent, when the upper layer adsorbent desorbs moisture under purging, this moisture directly enters the corresponding interlayer cavity and is quickly discharged outside the tank, without diffusing downwards to the lower layer with the airflow. The unsaturated adsorbent in the lower layer only comes into contact with the drying airflow during its own purging desorption, completely avoiding contact with the desorbed moisture from the upper layer. This prevents secondary adsorption and desorption of moisture in the lower layer adsorbent, significantly shortening the desorption cycle and improving the regeneration efficiency of the drying tank.

[0022] In the early stage of desorption, the adsorbent adsorbs a large amount of moisture during the initial drying phase of the exhaust gas. Its porous structure is filled with numerous water molecules, which cause the adsorbent particles to expand through hydration or physical filling effects, resulting in increased particle volume. Since the adsorbent in the existing drying tank is in a fixed-fill state, the increased particle size causes them to compress each other, compressing the original gaps between particles and resulting in a relatively dense overall structure. In the later stage of desorption, as the hot drying airflow continues, the moisture inside the adsorbent is continuously heated and vaporized, and discharged with the airflow. Water molecules in the porous structure gradually escape, and the adsorbent particles, deprived of moisture support, gradually return to their contracted state before absorbing water, thus reducing their volume. The compression between particles weakens, releasing the previously compressed gaps, resulting in a significant increase in the size of the gaps between particles.

[0023] In the early stage of desorption, the adsorbent particles are dense with narrow gaps, which significantly increases the flow resistance of the drying hot airflow and increases energy consumption. In the later stage of desorption, the gaps between the adsorbent particles become larger. Although the airflow resistance is greatly reduced, the airflow can easily sweep quickly across the surface of the adsorbent particles along the gaps, making it difficult to penetrate into the particles to contact residual moisture, resulting in insufficient desorption of internal moisture. To solve this technical problem, this application makes the following improvements: Please see Figure 2 , Figure 4 As shown, a lifting component 8 is installed on the side of the first separating component 5. The lifting component 8 is used to lower or raise the second separating component 6. When the second separating component 6 lowers, the space of the adsorbent bed above the second separating component 6 increases, and the volume of the interlayer cavity between the second separating component 6 and the first separating component 5 decreases, and the opening of the air outlet 13 shrinks. When the second separating component 6 rises, it squeezes the adsorbent bed above the second separating component 6, and the volume of the interlayer cavity between the second separating component 6 and the first separating component 5 increases, and the opening of the air outlet 13 increases. This technical solution utilizes a liftable second partition component 6 in conjunction with a fixed first partition component 5. This allows for adaptation of the adsorbent bed space, interlayer cavity, and vent size according to the state of the adsorbent at different desorption stages. In the early stages of desorption, taking advantage of the adsorbent's water absorption and expansion characteristics, the lowering of the upper partition actively expands the adsorbent bed space. This prevents the expanded particles from being excessively compressed due to limited space, thus further reducing gaps and effectively alleviating airflow resistance and reducing fan power consumption. Simultaneously, the reduced interlayer cavity and vent size slow down the airflow velocity, prolonging the contact time between the dry, hot airflow and the adsorbent. In the middle, to avoid insufficient local desorption caused by rapid airflow through the layers, the uniformity of desorption is improved. In the later stage of desorption, when the adsorbent particles shrink due to dehydration, the second separator 6 rises to slightly compress the adsorbent bed above it, which can fill the excessive gaps caused by particle shrinkage, prevent the airflow from quickly sweeping across the surface along the gaps, and force the airflow to penetrate into the interior of the particles more easily to contact the residual moisture, thereby improving the thoroughness of desorption. The dynamically adjustable bed space throughout the process facilitates stable airflow resistance while ensuring efficient moisture discharge, which can ensure the continuous efficiency of the desorption process and provide reliable support for the continuity of the subsequent tail gas drying process.

[0024] Please see Figure 7As shown, the first partition component 5 includes a first fixed plate 501, which is fixedly connected to the inner wall of the drying inner cylinder 3. The first fixed plate 501 has a first vent 502 arranged in a ring array inside, and a mesh plate is fixedly connected inside the first vent 502. The top of the first fixed plate 501 is fixedly connected to a first annular groove 503. A first baffle plate 504 is rotatably connected inside the first annular groove 503. The first baffle plate 504 has a first alignment port 505 arranged in a ring array inside, and a mesh plate is fixedly connected inside the first alignment port 505. A rotating component 7 is installed at the middle position of the first fixed plate 501. The rotating component 7 is used to drive the first baffle plate 504 to rotate. When the first alignment port 505 is aligned with the first vent 502, the first partition component 5 is in the open state. When the first alignment port 505 is misaligned with the first vent 502, the first partition component 5 is in the closed state.

[0025] Please see Figure 5 and Figure 6 As shown, the second partition component 6 includes a second fixing plate 601, which is slidably connected to the inner wall of the drying inner cylinder 3. The interior of the second fixing plate 601 is provided with a second vent 602 arranged in a ring array, and the second vent 602 and the first vent 502 are staggered. The bottom of the second fixing plate 601 is fixedly connected to a second annular groove 603, and the interior of the second annular groove 603 is rotatably connected to a second baffle plate 604. The interior of the second baffle plate 604 is provided with a second alignment port 605. A rotating component 7 is installed at the middle position of the second fixing plate 601 to drive the rotation of the second baffle plate 604. The bottom of the second annular groove 603 is fixedly connected to a sealing ring 606.

[0026] Please see Figure 8 As shown, the rotating assembly 7 includes a first motor 704, and a gear 703 is fixedly connected to the output end of the first motor 704. The rotating assembly 7 also includes an arc-shaped opening 701, which is opened inside the first blocking plate 504 and the second blocking plate 604. A serrated rack 702 is provided inside the arc-shaped opening 701. The gear 703 is inserted into the arc-shaped opening 701, and the gear 703 meshes with the serrated rack 702. When the first motor 704 rotates with the gear 703, it can rotate the corresponding first blocking plate 504 or second blocking plate 604 because it meshes with the serrated rack 702.

[0027] Please see Figure 4 and Figure 7As shown, the lifting assembly 8 includes a second motor 801, which is mounted on the side of the first partition assembly 5. The output end of the second motor 801 is fixedly connected to a lead screw 802, and the external thread of the lead screw 802 is connected to a lifting nut 803, which is fixedly connected to the side of the second partition assembly 6. The second motor 801 also includes a guide rod 804, which is fixedly connected to the side of the first partition assembly 5 away from the second motor 801. The external thread of the guide rod 804 is slidably connected to a guide cylinder 805, which is fixedly connected to the side of the second partition assembly 6. When the output end of the second motor 801 rotates with the lead screw 802, it can raise or lower the second partition assembly 6. The guide cylinder 805 slides up and down along the guide rod 804 to limit the lifting movement of the second partition assembly 6.

[0028] Working principle: Sorbic acid exhaust gas is transported through inlet pipe 9 to the drying outer tank 1, which performs the drying function. The first partition component 5 and the second partition component 6 inside the drying tank are both open, while the outlet holes 13 are all closed. The sorbic acid exhaust gas passes from bottom to top through the drying inner cylinder 3. The adsorbent filled inside the drying inner cylinder 3 adsorbs the moisture carried in the exhaust gas. After drying in the drying tank, the gas is discharged out through outlet pipe 10. At this time, the other drying outer tank 1 performs desorption. Part of the gas discharged out through outlet pipe 10 after drying in the drying tank is introduced into the drying outer tank. Inside the drying tube 11, after being heated, the dry hot air flow is introduced into the desorption tank through the drying tube 11 and the jet valve 2. The first jet valve 2, which is the jet valve 2 located above the diverter plate 12, is opened first. The dry hot air flow is divided into several downward small air flow by the diversion effect of the diverter plate 12 and enters the first layer of adsorbent bed. At this time, the first separation component 5 is in the closed state and the second separation component 6 is in the open state. The air flow carrying moisture from the first layer of adsorbent bed enters the first layer of interlayer cavity through the first separation component 5 and is discharged outward through the air outlet hole 13. After the adsorbent in the first layer of the adsorbent bed has completed desorption, the second partition component 6 of the first layer is closed and the first partition component 5 is opened. At the same time, the second set of jet valves 2, which are located in the interlayer cavity between the first partition component 5 and the second partition component 6 of the first layer, start blowing air. The dry hot airflow enters the second layer of the adsorbent bed through the first partition component 5 to desorb it, and carries the moisture from the interlayer cavity below and the jet valve 2 to the exhaust cavity 4. This process is repeated layer by layer to desorb the moisture adsorbed in the adsorbent inside the drying inner cylinder 3.

[0029] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A tail gas drying device for sorbic acid production, characterized in that, The device includes an outer drying tank, with two sets of outer drying tanks arranged side by side. One set of outer drying tanks is an adsorption tank, and the other set is a desorption tank. The two sets of outer drying tanks operate alternately. An inner drying cylinder runs through the interior of each outer drying tank. The inner drying cylinder is fixedly connected to the outer drying tank, and a baffle between the inner drying cylinder and the outer drying tank forms an exhaust cavity. A first partition component and a second partition component are installed inside the inner drying cylinder. The first and second partition components are arranged in parallel, and a baffle between the first and second partition components forms a sandwich cavity. Three sets of sandwich cavities are arranged at equal intervals around the interior of the inner drying cylinder, dividing the interior of the inner drying cylinder into three sets of adsorbent beds. An exhaust hole is opened on the side of the inner drying cylinder, and the sandwich cavity is connected to the exhaust cavity through the exhaust hole. A lifting assembly is installed on the side of the first separating component. The lifting assembly is used to lower or raise the second separating component. When the second separating component lowers, the space of the adsorbent bed above the second separating component increases, and the volume of the interlayer cavity between the second separating component and the first separating component decreases, and the opening of the air outlet hole narrows. When the second separating component rises, it compresses the adsorbent bed above the second separating component, and the volume of the interlayer cavity between the second separating component and the first separating component increases, and the opening of the air outlet hole increases.

2. The tail gas drying device based on the sorbic acid production process according to claim 1, characterized in that: An air outlet pipe is installed on the top of the outer drying tank and is connected to the outer drying tank. An air inlet pipe is installed at the bottom of the outer drying tank and is connected to the outer drying tank. A flow divider plate is fixedly connected to the top of the inner drying cylinder.

3. The tail gas drying device based on the sorbic acid production process according to claim 2, characterized in that: A drying air pipe is installed on the side of the air outlet pipe. The drying air pipe is connected to the air outlet pipe, and the bottom end of the drying air pipe extends into the interior of the drying inner cylinder. An air jet valve is installed on the drying air pipe.

4. The tail gas drying device based on the sorbic acid production process according to claim 1, characterized in that: The first partition component includes a first fixing plate, which is fixedly connected to the inner wall of the drying inner cylinder. The first fixing plate has a first vent in a ring array inside, and a mesh plate is fixedly connected inside the first vent.

5. The tail gas drying device based on the sorbic acid production process according to claim 4, characterized in that: The top of the first fixed plate is fixedly connected to a first annular groove, and a first blocking plate is rotatably connected inside the first annular groove. The first blocking plate has a first alignment port arranged in a ring array inside, and a mesh plate is fixedly connected inside the first alignment port.

6. The tail gas drying device based on the sorbic acid production process according to claim 4, characterized in that: A rotating assembly is installed at the middle position of the first fixed plate. The rotating assembly is used to drive the first blocking plate to rotate. When the first alignment port is aligned with the first vent, the first partition assembly is in the open state. When the first alignment port is misaligned with the first vent, the first partition assembly is in the closed state.

7. The tail gas drying device based on the sorbic acid production process according to claim 1, characterized in that: The second partition component includes a second fixing plate, which is slidably connected to the inner wall of the drying inner cylinder. The interior of the second fixing plate is provided with a second air vent in a ring array, and the second air vent and the first air vent are staggered.

8. The tail gas drying device based on the sorbic acid production process according to claim 7, characterized in that: The bottom of the second fixed plate is fixedly connected to a second annular groove, and a second blocking plate is rotatably connected inside the second annular groove. The second blocking plate has a second alignment opening inside. A rotating assembly is installed in the middle of the second fixed plate to drive the rotation of the second blocking plate. A sealing ring is fixedly connected to the bottom of the second annular groove.

9. The tail gas drying device based on the sorbic acid production process according to claim 6, characterized in that: The rotating assembly includes a first motor, and a gear is fixedly connected to the output end of the first motor. The rotating assembly also includes an arc-shaped opening, inside which a serrated rack is provided. The gear is inserted into the inside of the arc-shaped opening, and the gear meshes with the serrated rack.

10. The tail gas drying device based on the sorbic acid production process according to claim 1, characterized in that: The lifting assembly includes a second motor, which is mounted on the side of the first partition assembly. The output end of the second motor is fixedly connected to a lead screw, and the external thread of the lead screw is connected to a lifting nut, which is fixedly connected to the side of the second partition assembly. The second motor also includes a guide rod, which is fixedly connected to the side of the first partition assembly away from the second motor. The guide rod is slidably connected to a guide cylinder, which is fixedly connected to the side of the second partition assembly.

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