An ethylene oxide circulating catalytic absorption device with a concentration detection function

Abstract

The present invention discloses an ethylene oxide circulating catalytic absorption device with a concentration detection function, which relates to the technical field of ethylene oxide waste gas absorption. It includes a tower body and a driving rod. One side of the tower body is provided with a waste gas input pipe, a catalytic liquid input pipe, and a packing input pipe. Inside the tower body, there are a piston plate, a material bearing plate, and a connecting rod. The driving rod is used to connect the tower body and the piston plate. The piston plate is connected to the material bearing plate through the connecting rod. There are two piston plates, and the two piston plates are arranged at the upper and lower ends of the connecting rod. A number of material bearing plates are arranged between the two piston plates. By making the packing jump on the material bearing plate, the packing is in a floating state for a short time, and at the same time, the air flow is allowed to pass through the floating packing, so that the whole packing is exposed to the air flow, thereby increasing the contact area between the air flow and the packing, and further improving the effect of the packing absorbing ethylene oxide.

Description

Technical Field

[0001] The present invention relates to the technical field of ethylene oxide waste gas absorption, and particularly to an ethylene oxide circulating catalytic absorption device with a concentration detection function. Background Art

[0002] Ethylene oxide (EO) is a basic cyclic ether compound, belonging to the heterocyclic compound class and being an important component in petrochemical products. It is a colorless and transparent liquid at low temperatures and a colorless gas with a pungent ether smell at normal temperatures. As a valuable chemical, ethylene oxide is very crucial in industrial applications. However, its emission can cause environmental pollution. To reduce this impact, ethylene oxide is usually introduced into a dedicated absorption device.

[0003] Currently, the absorption of ethylene oxide mainly relies on dedicated absorption towers. These devices are filled with sufficient absorption materials (packing) and catalytic liquid. Under the action of the catalytic liquid, ethylene oxide undergoes a chemical reaction with the packing to achieve the purpose of recovery. Most chemical plants related to ethylene oxide production are equipped with such absorption towers.

[0004] However, there are some problems in the operation of existing ethylene oxide absorption devices. The absorption materials accumulate at the lower part inside the device and are in close contact with each other, which leads to insufficient contact with ethylene oxide, causing some absorption materials to not fully play their role. Since the absorption of ethylene oxide requires the participation of catalytic liquid, the packing in the lower layer is difficult to come into sufficient contact with the gas flow due to long-term contact with the catalytic liquid, and it is prone to caking, which further reduces the effectiveness of the packing and increases the cost of ethylene oxide reaction. Summary of the Invention

[0005] The purpose of the present invention is to provide an ethylene oxide circulating catalytic absorption device with a concentration detection function to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solution: An ethylene oxide circulating catalytic absorption device with a concentration detection function, including a tower body and a driving rod. An exhaust gas input pipe, a catalytic liquid input pipe, and a packing input pipe are provided on one side of the tower body. A piston plate, a material bearing plate, and a connecting rod are arranged inside the tower body. The driving rod is used to connect the tower body and the piston plate. The piston plate is connected to the material bearing plate through the connecting rod. There are two piston plates, and the two piston plates are arranged at the upper and lower ends of the connecting rod. A plurality of material bearing plates are arranged between the two piston plates. The material bearing plates are inclined, and a plurality of the material bearing plates are arranged in a Z shape. A connecting component is arranged at the connection between the connecting rod and the material bearing plate. A plurality of convex blocks are arranged inside the tower body, and the convex blocks cooperate with the connecting component to control the horizontal and vertical movement of the material bearing plate;

[0007] On one side of the tower body, a feed pipe is provided. Inside the feed pipe, a grid is arranged. The grid divides the feed pipe into two horizontal spaces. Inside one of the spaces, a screw conveyor is installed. The upper and lower ends of the feed pipe are connected to the tower body. At the upper end of the screw conveyor, a driving motor is provided. During rotation, the screw conveyor transports the packing material below inside the feed pipe from the lower part of the feed pipe to the upper part of the feed pipe. The exhaust gas input pipe, the catalytic liquid input pipe, and the packing input pipe above the tower body spray the exhaust gas, the catalytic liquid, and the packing material respectively on the uppermost bearing plate. The catalytic liquid is sprayed on the packing material in an atomized manner. An atomizing nozzle is installed at the end of the catalytic liquid input pipe. During the operation of the driving rod, it cooperates with the connecting rod to control the lifting movement of the piston plate and the bearing plate. When the piston plate is rising, the exhaust gas at the uppermost part inside the tower body is forced by the extrusion of the upper piston plate to pass through the piston plate and the bearing plate in the form of an air flow. During the air flow passing through the piston plate, since the upper piston plate is composed of a single metal mesh plate, the air flow is evenly dispersed during passing through the piston plate, realizing that the air flow covers the bearing plate during its downward movement; partition plates are installed on both sides of the bearing plate. The movable plate passes through the partition plate and is connected to the bearing plate. At the same time, the movable plate is slidably and sealedly connected to the bearing plate to prevent the air flow in the middle of the partition plate from entering the gap between the partition plate and the tower body under the action of extrusion, so as to reduce the gap size between the bearing plate and the tower body, making the air flow mainly move up and down through the holes on the bearing plate; the piston plate is of a mesh structure. The solid area on the piston plate is larger than the mesh area, and at the same time, the mesh has a small diameter. The structure of the piston plate is set to facilitate the formation of an air flow of ethylene oxide in the tower body while not affecting the air flow communication at both ends of the piston plate.

[0008] Further, the bearing plate is composed of a bracket and a metal mesh. The metal mesh is in a wavy shape. Above the bearing plate, several partition plates are provided. Deflection rods are arranged on both sides of each partition plate. A limiting shaft is installed at the connection between the deflection rod and the partition plate. The limiting shaft is used to limit the deflection angle of the deflection rod; since the bearing plate is inclined, the height of one side of the bearing plate is higher than that of the other side. The wavy setting of the metal mesh inside the bearing plate is beneficial to separating the packing material, realizing that the packing material covers the upper surface of the bearing plate, and the inclined setting of the bearing plate realizes the one-way movement of the packing material during vibration. At the same time, the packing material at the end of the upper stroke of the upper bearing plate actively drops to the initial end of the upper stroke of the lower bearing plate.

[0009] Furthermore, the connecting component includes a bushing arranged outside the connecting rod. One side of the bushing is rotatably connected with a limiting sleeve. A spring shaft is installed between the bushing and the limiting sleeve. A movable rod is slidably connected to the middle of the limiting sleeve. One end of the movable rod is movably connected with the material receiving plate. The movable rod contacts the convex block during lifting and lowering; the material receiving plate makes a reciprocating lifting and lowering movement under the action of the driving rod. During the lifting and lowering of the material receiving plate, since one end of the convex block is connected to the tower body, that is, the material receiving plate contacts the convex block through the movable rod during lifting and lowering. When the movable rod contacts the convex block, the convex block hinders the movable rod from continuing to rise or fall following the material receiving plate, forcing the movable rod to deflect around the spring shaft. At this time, the movable rod changes from a horizontal state to an inclined state. The inclined movable rod temporarily crosses the convex block. At this time, the connecting rod continues to rise. Under the cooperation of the convex block, the movable rod is forced to drive the material receiving plate to move horizontally until the movable rod crosses the convex block. After the movable rod is released from the restriction of the convex block, under the action of the spring shaft, the movable rod drives the material receiving plate to reset. That is, a relative movement is formed between the material receiving plate and the connecting rod during the contact between the material receiving plate and the convex block through the movable rod, and vibration and horizontal movement phenomena occur between the material receiving plate and the connecting rod. Since the material receiving plate is inclined, the filler above the material receiving plate moves from the higher side of the material receiving plate to the lower side under the action of vibration.

[0010] Furthermore, one bracket and one metal mesh form a material receiving group. The material receiving plate is composed of several material receiving groups. The adjacent two material receiving groups are slidably connected. Movable rods are connected to both sides of each material receiving group; since the material receiving plate is composed of several material receiving groups and movable rods are connected to both sides of each material receiving group, when the connecting components on both sides of the material receiving group contact the convex block, the material receiving group drives the entire material receiving plate to vibrate up and down. The filler above the material receiving plate is separated from the material receiving plate. When the filler rises relative to the material receiving plate, the filler pushes the deflecting rod to deflect until the filler crosses the deflecting rod. When the filler descends relative to the material receiving plate, since the deflecting rod is connected to the partition through the limiting shaft, the filler impacts on the deflecting rod. At this time, the deflecting rod is perpendicular to the partition, and the filler cannot push the deflecting rod to continue deflecting, realizing that the filler moves to both sides of the deflecting rod after impacting on the surface of the deflecting rod. During the movement of the material receiving plate, the material receiving plate transfers kinetic energy to the filler, realizing the jumping of the filler relative to the material receiving plate, and a short-term floating phenomenon of the filler relative to the material receiving plate occurs;

[0011] The material receiving group generates a relative sliding in the horizontal direction with the adjacent material receiving group under the action of the connecting component and the convex block, that is, a dislocation phenomenon occurs between the adjacent two material receiving groups. The partitions above the misaligned material receiving groups are still on the same straight line. The purpose of forming a dislocation phenomenon between the adjacent two material receiving groups is to transport the filler above the material receiving plate in the horizontal direction, avoiding different amounts of filler between the adjacent two partitions. After dislocation, the filler will move between the partitions, moving from the side with more filler in the partition gap to the side with less filler in the partition gap, keeping the upper surface of the material receiving plate completely covered with filler;

[0012] Through the bouncing of the packing material on the material receiving plate, the floating state of the packing material in the air flow is achieved, increasing the contact area between the air flow and the packing material, thereby improving the absorption efficiency of ethylene oxide, accelerating the absorption of ethylene oxide, reducing the time required for ethylene oxide absorption. At the same time, a circulation system is designed so that the packing material and the catalytic liquid can be recycled, improving the utilization rate of materials and the treatment efficiency, reducing the absorption cost, and improving the absorption efficiency. The mesh structure design of the piston plate and its cooperation with the driving rod enable the air flow to form an effective circulation inside the tower body, while ensuring the air flow connectivity to guarantee the contact effect between the air flow and the packing material. The inclined setting of the material receiving plate, the design of the corrugated metal mesh, as well as the structure of the partition plate and the deflecting rod make the packing material evenly distributed on the material receiving plate, reducing the contact area between the packing materials, increasing the contact area between the packing material and ethylene oxide as well as the catalytic liquid, and being able to achieve one-way movement, improving the ethylene oxide absorption efficiency, enhancing the absorption efficiency and the recycling of materials, and reducing the reaction cost of ethylene oxide treatment.

[0013] Furthermore, a material spreading component is installed at the connection between the upper end of the feeding pipe and the tower body. A concentration monitoring element is installed on one side inside the feeding pipe. An outlet pipe is arranged below the feeding pipe, and a control valve is installed inside the outlet pipe. The concentration monitoring element in the feeding pipe is used to monitor the concentration state of ethylene oxide in the air flow in real time. When the ethylene oxide concentration in the air flow reaches the standard, during the downward movement of the piston plate, the valve below the feeding pipe opens, and the air flow leaves the tower through the valve. On the contrary, before the ethylene oxide concentration in the air flow reaches the standard, the valve is in a closed state, and the air flow continues to circulate inside the tower body under the action of the piston plate and the driving rod. Among them, the concentration monitoring element is used to compare the concentration changes of ethylene oxide in the air flow in two adjacent times. When the difference between the concentrations obtained from adjacent detections is small, it indicates that the absorption effect of the packing material and the catalytic liquid has reached saturation. The driving motor drives the screw conveyor rod to rotate in the reverse direction to convey the packing material accumulated below the tower body out of the tower body. It can monitor the concentration of ethylene oxide in the air flow in real time, adjust the operation according to the concentration change, ensure the treatment effect, and guarantee that ethylene oxide meets the purification standard. Through the design of the collecting plate and the feeding pipe, the repeated contact between the packing material and the catalytic liquid is avoided, the packing material caking is prevented, and the activity of the packing material is maintained.

[0014] Further, the material scattering assembly includes a connecting shaft disposed on the inner wall of the tower body. A number of blades are installed on the outer side of the connecting shaft. An arc-shaped plate is installed on the inner side of the material conveying pipe. A guiding piece is installed on the outer wall of one side of the blade. The guiding piece is in a triangular pyramid shape. The driving motor drives the spiral conveying rod to rotate and drive the filler to rise in the material conveying pipe. When the piston plate descends under the action of the driving rod, part of the air flow enters the interior of the material conveying pipe. Since a grid is arranged inside the material conveying pipe, the grid restricts the filler to one side inside the material conveying pipe. The grid and the material conveying pipe cooperate with each other to form a filler transportation channel outside the spiral conveying rod. Furthermore, an air flow channel is formed on the other side of the grid. Since there is a large amount of filler inside the filler, it forces the air flow to enter the interior of the air flow channel under the action of the descending piston plate. When the air flow leaves the material conveying pipe, it contacts the blade. The air flow drives the blade to rotate around the connecting shaft as the center. The arc-shaped plate is arranged on one side of the blade. The filler enters the groove formed by the arc-shaped plate and the blade under the action of the spiral conveying rod. Subsequently, while the air flow drives the blade to rotate, it carries the filler into the tower body. The filler finally falls on the material receiving plate. The arc-shaped plate cooperates with the blade to form a temporary material storage groove, and at the same time restricts the amount of filler carried by the blade each time. Secondly, the arc-shaped plate is used to restrict the output direction of the air flow, so that the air flow passes above the connecting shaft. The role of the guiding piece is to guide the output air flow and filler, so that the filler is evenly spread on the material receiving plate.

[0015] Further, the upper piston plate is composed of a single metal mesh plate, and the lower piston plate is composed of a number of metal mesh plates. The two metal mesh plates are connected in an inverted V shape. A spring shaft is installed at the connection of the two metal mesh plates; the metal mesh plates are in an unfolded state in the normal state through the spring shaft. When the piston plate descends, the metal mesh plates are in the maximum unfolded state at this time, and adjacent metal mesh plates are in contact with each other. At this time, the covered surface of the mesh plate is the same as the horizontal cross-section of the tower body, so as to output most of the air flow below the piston plate to the lower part of the piston plate located below through the material conveying pipe; when the piston plate rises, the air pressure above the metal mesh plate pushes the metal mesh plate to deflect around the spring shaft as the center, and a gap appears between adjacent metal mesh plates, so as to facilitate the air flow to pass through the piston plate located below.

[0016] Further, a collecting plate is arranged below the interior of the tower body. The feeding ends of the material conveying pipes are arranged on both sides below the collecting plate. The discharging end of the material conveying pipe is installed in the middle of the tower body; the collecting plate recovers the filler leaving the material receiving plate. The recovered filler is guided to the feeding end of the material conveying pipe. The upper part of the middle of the tower body is new filler, and the new filler needs to contact the catalytic liquid. The filler output through the material conveying pipe has already contacted the catalytic liquid, avoiding repeated contact between the filler and the catalytic liquid, resulting in agglomeration between the fillers.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] By making the packing jump on the material receiving plate, the packing is in a transient suspended state in the air flow, which increases the contact area between the air flow and the packing, thus effectively improving the absorption efficiency of ethylene oxide, accelerating the absorption process, shortening the required time. In addition, a circulation system is designed to allow the packing and the catalytic liquid to be recycled, which not only improves the utilization rate of materials and the treatment efficiency, but also reduces the absorption cost of ethylene oxide and enhances the absorption efficiency of ethylene oxide;

[0019] The piston plate is designed with a mesh structure and cooperates with the driving rod to form an effective air flow circulation in the tower body, while ensuring the connectivity of the air flow and guaranteeing the contact effect between the air flow and the packing; the inclined setting of the material receiving plate and the design of the corrugated metal mesh, combined with the structure of the partition plate and the deflection rod, ensure the uniform distribution of the packing on the material receiving plate, reduce the contact area between the packings, and at the same time increase the contact area between the packing and ethylene oxide and the catalytic liquid. This design also realizes the one-way movement of the packing on the material receiving plate, further improving the absorption efficiency of ethylene oxide, promoting the recycling of materials, and reducing the reaction cost of ethylene oxide treatment;

[0020] The equipment is also equipped with a concentration monitoring element, which can monitor the concentration of ethylene oxide in the air flow in real time. The staff can make corresponding adjustments to the equipment according to the concentration change to ensure the treatment effect, so as to ensure that ethylene oxide meets the purification standard. Through the design of the collection plate and the feeding pipe, the repeated contact between the packing and the catalytic liquid is avoided, the packing caking is prevented, and the activity of the packing is maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 is the schematic diagram of the front view full-section structure of the present invention;

[0023] Figure 2 is the Figure 1 schematic diagram of the enlarged structure at A in the present invention;

[0024] Figure 3 is the schematic diagram of the top view full-section structure of the tower body of the present invention;

[0025] Figure 4 is the schematic diagram of the left side view structure of the connecting component of the present invention;

[0026] Figure 5 is the schematic diagram of the front view structure of the partition plate of the present invention;

[0027] Figure 6 is the schematic diagram of the left side view full-section structure of the material receiving plate of the present invention;

[0028] Figure 7 is a schematic diagram of the overall sectional view of the material conveying pipe of the present invention from above

[0029] Figure 8 is a schematic diagram of the overall sectional view of the material conveying pipe of the present invention from the front

[0030] In the figure: 1, tower body; 2, driving rod; 3, piston plate; 4, material receiving plate; 401, partition plate; 402, deflection rod; 403, limiting shaft; 5, connecting rod; 6, connecting component; 601, bushing; 602, limiting sleeve; 603, movable rod; 7, convex block; 8, material conveying pipe; 9, grid; 11, screw conveyor; 12, material spreading component; 1201, connecting shaft; 1202, blade; 1203, arc plate; 1204, guiding piece; 13, concentration monitoring element; 14, discharge pipe; 15, collecting plate Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention

[0032] Please refer to Figures 1-8 , the present invention provides a technical solution: an ethylene oxide circulation catalytic absorption device with a concentration detection function, including a tower body 1 and a driving rod 2. An exhaust gas input pipe, a catalytic liquid input pipe, and a packing input pipe are provided on one side of the tower body 1. A piston plate 3, a material receiving plate 4, and a connecting rod 5 are arranged inside the tower body 1. The driving rod 2 is used to connect the tower body 1 and the piston plate 3. The piston plate 3 is connected to the material receiving plate 4 through the connecting rod 5. There are two piston plates 3. The upper piston plate 3 is composed of a single metal mesh plate, and the lower piston plate 3 is composed of several metal mesh plates. The two metal mesh plates are connected in an inverted V shape. A spring shaft is installed at the connection of the two metal mesh plates. The piston plate 3 makes a reciprocating up and down movement in the tower body 1 driven by the driving rod 2. The piston plate 3 in the moving state compresses the air flow inside the tower body 1, and the movement path of the air flow passes through the vibrating packing, increasing the contact area between the air flow and the packing

[0033] The two piston plates 3 are arranged at the upper and lower ends of the connecting rod 5. Several material receiving plates 4 are arranged between the two piston plates 3. The material receiving plates 4 are inclined. The several material receiving plates 4 are arranged in a Z shape. The material receiving plate 4 is composed of a bracket and a metal mesh. The metal mesh is wavy. Several partition plates 401 are arranged above the material receiving plate 4. Deflection rods 402 are arranged on both sides of the partition plate 401. A limiting shaft 403 is installed at the connection of the deflection rod 402 and the partition plate 401. The limiting shaft 403 is used to limit the deflection angle of the deflection rod 402

[0034] A bracket and a metal mesh are combined to form a material-bearing group. The material-bearing plate 4 is composed of several material-bearing groups. The adjacent two material-bearing groups are slidably connected. The two sides of each material-bearing group are connected with movable rods 603.

[0035] A connecting component 6 is arranged at the connection between the connecting rod 5 and the material-bearing plate 4. The connecting component 6 includes a bushing 601 arranged on the outside of the connecting rod 5. One side of the bushing 601 is rotatably connected with a limit sleeve 602. A spring shaft is installed between the bushing 601 and the limit sleeve 602. The middle part of the limit sleeve 602 is slidably connected with a movable rod 603. One end of the movable rod 603 is movably connected with the material-bearing plate 4. The movable rod 603 contacts the convex block 7 during lifting.

[0036] The material-bearing plate 4 cooperates with the connecting component 6 to realize the vibration of the filler above the material-bearing plate 4. At the same time, the structure setting above the material-bearing plate 4 realizes that the filler is evenly spread on the upper surface of the material-bearing plate 4 during vibration. And the material-bearing plate 4 is inclined, realizing the one-way movement of the filler during vibration. At the same time, the filler at the end of the upper stroke of the upper material-bearing plate 4 actively drops to the initial end of the upper stroke of the lower material-bearing plate 4.

[0037] A number of convex blocks 7 are arranged inside the tower body 1. The convex blocks 7 cooperate with the connecting component 6 to control the horizontal and vertical movement of the material-bearing plate 4.

[0038] A feeding pipe 8 is arranged on one side of the tower body 1. A grid 9 is arranged inside the feeding pipe 8. The grid 9 divides the feeding pipe 8 into two horizontal spaces. A spiral conveyor 11 is installed inside one space. The upper and lower ends of the feeding pipe 8 are connected with the tower body 1.

[0039] A collecting plate 15 is arranged below the inside of the tower body 1. The feeding ends of the feeding pipes 8 are arranged on both sides below the collecting plate 15. The discharging end of the feeding pipe 8 is installed in the middle of the tower body 1. Due to the structure setting of the piston plate 3 below, when the piston plate 3 rises, a gap appears between the metal mesh plates, so that the filler leaving the material-bearing plate 4 can be collected by the collecting plate 15.

[0040] A material spreading component 12 is installed at the connection between the upper end of the feeding pipe 8 and the tower body 1. The material spreading component 12 includes a connecting shaft 1201 arranged on the inner wall of the tower body 1. A number of blades 1202 are installed on the outside of the connecting shaft 1201. An arc-shaped plate 1203 is installed on the inner side of the feeding pipe 8. A guiding piece 1204 is installed on the outer wall of one side of the blade 1202. The guiding piece 1204 is in the shape of a triangular pyramid.

[0041] On one side inside the material conveying pipe 8, a concentration monitoring element 13 is installed. A discharge pipe 14 is arranged below the material conveying pipe 8, and a control valve is installed inside the discharge pipe 14. The presence of the grid 9 causes a packing passage and an air flow passage to appear inside the material conveying pipe 8. Under the extrusion of the piston plate 3, the packing is driven by the air flow to be sprayed on the upper surface of the material receiving plate 4, and the packing and air flow that do not meet the output requirements are recycled again to ensure the full application of the packing absorption effect and ensure that the output air flow meets the emission standards.

[0042] The working principle of the present invention:

[0043] A driving motor is arranged at the upper end of the spiral conveying rod 11. During the rotation of the spiral conveying rod 11, the packing below the material conveying pipe 8 is transported from below the material conveying pipe 8 to above the material conveying pipe 8. The waste gas input pipe, the catalytic liquid input pipe, and the packing input pipe above the tower body 1 spray waste gas, catalytic liquid, and packing on the uppermost material receiving plate 4 respectively. The catalytic liquid is sprayed on the packing in an atomized manner. An atomizing nozzle is installed at the end of the catalytic liquid input pipe. During the operation of the driving rod 2, the connecting rod 5 is used to control the lifting movement of the piston plate 3 and the material receiving plate 4. When the piston plate 3 rises, the waste gas at the uppermost part inside the tower body 1 is forced by the extrusion of the upper piston plate 3 to pass through the piston plate 3 and the material receiving plate 4 in the form of an air flow. During the air flow passing through the piston plate 3, since the upper piston plate 3 is composed of a single metal mesh plate, the air flow is evenly dispersed during the passing through the piston plate 3, so that the air flow covers the material receiving plate 4 during the descending process;

[0044] Partition plates are installed on both sides of the material receiving plate. The movable plate 603 passes through the partition plate and is connected to the material receiving plate 4. At the same time, the movable plate 603 is slidably and sealedly connected to the material receiving plate 4 to prevent the air flow in the middle of the partition plate from entering the gap between the partition plate and the tower body 1 under the action of extrusion, so as to reduce the gap size between the material receiving plate 4 and the tower body 1, and make the air flow mainly move up and down through the holes on the material receiving plate 4;

[0045] The piston plate 3 is of a mesh structure. The solid area on the piston plate 3 is larger than the mesh area, and the mesh has a small diameter. The structure of the piston plate 3 is set to facilitate the formation of an air flow of ethylene oxide in the tower body 1, and at the same time does not affect the air flow communication at both ends of the piston plate 3;

[0046] The metal mesh plate is in an unfolded state in the normal state through the spring shaft. When the piston plate 3 descends, the metal mesh plate is in the maximum unfolded state at this time, and the adjacent metal mesh plates are in contact with each other. At this time, the covering surface of the mesh plate is the same as the horizontal cross-section of the tower body 1, so as to output most of the air flow below the piston plate 3 to below the piston plate 3 located below through the material conveying pipe 8;

[0047] When the piston plate 3 rises, the air pressure above the wire mesh plate pushes the wire mesh plate to deflect around the spring axis, creating a gap between adjacent wire mesh plates to facilitate the airflow through the piston plate 3 below;

[0048] Since the material receiving plate 4 is inclined, one side of the material receiving plate 4 is higher than the other side. The wavy arrangement of the wire mesh inside the material receiving plate 4 is conducive to separating the packing material, enabling the packing material to cover the upper surface of the material receiving plate 4. The inclined setting of the material receiving plate 4 enables the packing material to move unidirectionally during vibration. At the same time, the packing material at the end of the upward stroke of the upper material receiving plate 4 actively drops to the initial end of the upward stroke of the lower material receiving plate 4;

[0049] The material receiving plate 4 makes a reciprocating lifting motion under the action of the driving rod 2. During the lifting and lowering of the material receiving plate 4, since one end of the convex block 7 is connected to the tower body 1, that is, the material receiving plate 4 contacts the convex block 7 through the movable rod 603 during the lifting and lowering. When the movable rod 603 contacts the convex block 7, the convex block 7 hinders the movable rod 603 from following the material receiving plate 4 to continue rising or falling, forcing the movable rod 603 to deflect around the spring axis. At this time, the movable rod 603 changes from a horizontal state to an inclined state. The inclined movable rod 603 temporarily crosses the convex block 7. At this time, the connecting rod 5 continues to rise. With the cooperation of the convex block 7, the movable rod 603 is forced to drive the material receiving plate 4 to move horizontally until the movable rod 603 crosses the convex block 7. After the movable rod 603 is released from the restriction of the convex block 7, under the action of the spring axis, the movable rod 603 drives the material receiving plate 4 to reset. That is, the material receiving plate 4 forms a relative motion with the connecting rod 5 during the contact with the convex block 7 through the movable rod 603, and there are vibration and horizontal movement phenomena between the material receiving plate 4 and the connecting rod 5. Since the material receiving plate 4 is inclined, the packing material above the material receiving plate 4 moves from the higher side of the material receiving plate 4 to the lower side under the action of vibration;

[0050] Since the material receiving plate 4 is composed of several material receiving groups, movable rods 603 are connected to both sides of each material receiving group. When the connecting components 6 on both sides of the material receiving group contact the convex block 7, the material receiving group drives the entire material receiving plate 4 to vibrate up and down. The packing material above the material receiving plate 4 is separated from the material receiving plate 4. When the packing material rises relative to the material receiving plate 4, the packing material pushes the deflecting rod 402 to deflect until the packing material crosses the deflecting rod 402. When the packing material descends relative to the material receiving plate 4, since the deflecting rod 402 is connected to the partition plate 401 through the limiting shaft 403, the packing material impacts on the deflecting rod 402. At this time, the deflecting rod 402 and the partition plate 401 are perpendicular to each other, and the packing material cannot push the deflecting rod 402 to continue deflecting, realizing that the packing material moves to both sides of the deflecting rod 402 after impacting on the surface of the deflecting rod 402;

[0051] Under the action of the connecting component 6 and the bump 7, the material receiving group has a relative sliding in the horizontal direction with the adjacent material receiving group, that is, a dislocation phenomenon occurs between two adjacent material receiving groups. The partition plate 401 above the misaligned material receiving group is still on the same straight line. The purpose of the dislocation phenomenon between two adjacent material receiving groups is to transport the filler above the material receiving plate 4 in the horizontal direction, avoiding different amounts of filler between two adjacent partition plates 401. After dislocation, the filler will move between the partition plates 401, moving from the side with more filler in the gap between the partition plates 401 to the side with less filler in the gap between the partition plates 401, so as to keep the upper surface of the material receiving plate 4 completely covered with filler;

[0052] The collecting plate 15 recovers the filler leaving the material receiving plate 4, and the recovered filler is guided to the feeding end of the feeding pipe 8. Above the middle of the tower body 1 is new filler, and the new filler needs to contact the catalytic liquid. The filler output through the feeding pipe 8 has already contacted the catalytic liquid, avoiding repeated contact between the filler and the catalytic liquid, which may cause caking between the fillers;

[0053] The concentration monitoring element 13 in the feeding pipe 8 is used to monitor the concentration state of ethylene oxide in the air flow in real time. When the concentration of ethylene oxide in the air flow reaches the standard, during the downward movement of the piston plate 3, the valve below the feeding pipe 8 opens, and the air flow leaves the tower body 1 through the valve. On the contrary, before the concentration of ethylene oxide in the air flow reaches the standard, the valve is in the closed state, and the air flow continues to circulate in the tower body 1 under the action of the piston plate 3 and the driving rod 2. The concentration monitoring element 13 is used to compare the concentration changes of ethylene oxide in the air flow for two adjacent times. When the difference between the concentrations detected for two adjacent times is small, it indicates that the absorption effect of the filler and the catalytic liquid has reached saturation, and the driving motor drives the screw conveyor 11 to rotate in the reverse direction to transport the filler accumulated below the tower body 1 out of the tower body 1;

[0054] The driving motor drives the spiral conveyor rod 11 to rotate, driving the filler to rise in the material conveying pipe 8. When the piston plate 3 descends under the action of the driving rod 2, part of the air flow enters the interior of the material conveying pipe 8. Since a grid 9 is provided inside the material conveying pipe 8, the grid 9 restricts the filler to one side inside the material conveying pipe 8. The grid 9 and the material conveying pipe 8 cooperate with each other to form a filler transportation channel outside the spiral conveyor rod 11. Furthermore, an air flow channel is formed on the other side of the grid 9. Due to the presence of a large amount of filler inside the filler, the air flow is forced to enter the interior of the air flow channel under the action of the descending piston plate 3. When the air flow leaves the material conveying pipe 8, it comes into contact with the blade 1202. The air flow drives the blade 1202 to rotate around the connecting shaft 1201 as the center. The arc-shaped plate 1203 is arranged on one side of the blade 1202. The filler enters the groove formed by the rotating arc-shaped plate 1203 and the blade 1202 under the action of the spiral conveyor rod 11. Subsequently, while the air flow drives the blade 1202, it carries the filler into the tower body 1. The filler finally falls on the material receiving plate 4. Among them, the arc-shaped plate 1203 cooperates with the blade 1202 to form a temporary material storage groove. At the same time, the arc-shaped plate 1203 limits the quantity of filler carried by the blade 1202 each time. Secondly, it is used to limit the output direction of the air flow, enabling the air flow to pass above the connecting shaft 1201. The guiding piece 1204 serves to guide the output air flow and filler, so that the filler is evenly spread on the material receiving plate 4.

[0055] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0056] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An ethylene oxide circulating catalytic absorption device with a concentration detection function, comprising a tower body (1) and a driving rod (2), characterized in that: On one side of the tower body (1), an exhaust gas input pipe, a catalytic liquid input pipe, and a packing input pipe are provided. Inside the tower body (1), a piston plate (3), a material bearing plate (4), and a connecting rod (5) are provided. The driving rod (2) is used to connect the tower body (1) and the piston plate (3). The piston plate (3) is connected to the material bearing plate (4) through the connecting rod (5). There are two piston plates (3), and the two piston plates (3) are arranged at the upper and lower ends of the connecting rod (5). Between the two piston plates (3), several material bearing plates (4) are provided. The material bearing plates (4) are inclined, and several material bearing plates (4) are arranged in a Z shape. A connecting component (6) is provided at the connection between the connecting rod (5) and the material bearing plate (4). Inside the tower body (1), several bumps (7) are provided, and the bumps (7) cooperate with the connecting component (6) to control the horizontal and vertical movement of the material bearing plate (4); On one side of the tower body (1), a feeding pipe (8) is provided. Inside the feeding pipe (8), a grid (9) is provided. The grid (9) divides the feeding pipe (8) into two horizontal spaces. Inside one of the spaces, a screw conveyor (11) is installed. The upper and lower ends of the feeding pipe (8) are connected to the tower body (1).

2. The ethylene oxide circulation catalytic absorption device with a concentration detection function according to claim 1, characterized in that: The material bearing plate (4) is composed of a bracket and a metal mesh. The metal mesh is wavy. Above the material bearing plate (4), several partition plates (401) are provided. Deflection rods (402) are provided on both sides of the partition plates (401). A limiting shaft (403) is installed at the connection between the deflection rod (402) and the partition plate (401). The limiting shaft (403) is used to limit the deflection angle of the deflection rod (402).

3. The ethylene oxide circulation catalytic absorption device with a concentration detection function according to claim 2, characterized in that: The connecting component (6) includes a bushing (601) arranged on the outer side of the connecting rod (5). One side of the bushing (601) is rotatably connected to a limiting sleeve (602). A spring shaft is installed between the bushing (601) and the limiting sleeve (602). An activity rod (603) is slidably connected to the middle of the limiting sleeve (602). One end of the activity rod (603) is movably connected to the material bearing plate (4). The activity rod (603) contacts the bump (7) during lifting and lowering.

4. An ethylene oxide circulating catalytic absorption device with a concentration detection function according to claim 3, characterized in that: One bracket and one metal mesh form a material bearing group. The material bearing plate (4) is composed of several material bearing groups. The adjacent two material bearing groups are slidably connected. Activity rods (603) are connected to both sides of each material bearing group.

5. The ethylene oxide circulation catalytic absorption device with a concentration detection function according to claim 1, characterized in that: At the connection between the upper end of the feeding pipe (8) and the tower body (1), a material spreading component (12) is installed. A concentration monitoring element (13) is installed on one side inside the feeding pipe (8). A discharge pipe (14) is provided below the feeding pipe (8). A control valve is installed inside the discharge pipe (14).

6. An ethylene oxide circulating catalytic absorption device with a concentration detection function according to claim 5, characterized in that: The material scattering component (12) includes a connecting shaft (1201) arranged on the inner wall of the tower body (1). A number of blades (1202) are installed on the outer side of the connecting shaft (1201). An arc-shaped plate (1203) is installed on the inner side of the material conveying pipe (8). A guiding piece (1204) is installed on the outer wall of one side of the blade (1202), and the guiding piece (1204) is in a triangular pyramid shape.

7. An ethylene oxide circulation catalytic absorption device with a concentration detection function according to claim 1, characterized in that: The upper piston plate (3) is composed of a single metal mesh plate, and the lower piston plate (3) is composed of a number of metal mesh plates. The two metal mesh plates are connected in an inverted V shape, and a spring shaft is installed at the connection of the two metal mesh plates.

8. An ethylene oxide circulation catalytic absorption device with a concentration detection function according to claim 1, characterized in that: A collecting plate (15) is arranged below the interior of the tower body (1). The feeding ends of the material conveying pipes (8) are arranged on both sides below the collecting plate (15), and the discharging ends of the material conveying pipes (8) are installed in the middle of the tower body (1).

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