Polypropylene production and processing tail gas environmental protection treatment device

Abstract

The application relates to the technical field of atmospheric pollution treatment, in particular to a tail gas environment-friendly treatment device for polypropylene production and processing. The device comprises a frame, the frame is fixedly connected with a spraying cylinder, the spraying cylinder is connected with a removal pipe and a circulation pipe, the spraying cylinder is fixedly connected with a gas conveying pipe, and a heat exchange unit is arranged on the gas conveying pipe; the heat exchange unit comprises circumferentially arrayed heat exchange pipes, the circumferentially arrayed heat exchange pipes are all connected with the gas conveying pipe, the circumferentially arrayed heat exchange pipes are jointly connected with a collecting pipe, the collecting pipe is connected with a variable-diameter pipe, the variable-diameter pipe is connected with a transfer pipe, and the transfer pipe is connected with circumferentially arrayed exhaust pipes. The heat exchange pipes and the variable-diameter pipe are matched, the tail gas is used for heating the absorption liquid, the solubility of the salt impurities in the absorption liquid is improved, the condensation probability of the salt solid impurities in the absorption liquid is reduced, and the blockage probability of the circulation pipeline is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of air pollution control technology, and more particularly to a tail gas environmental protection treatment device for polypropylene production and processing. BACKGROUND

[0002] Polypropylene is an important thermoplastic plastic, widely used in packaging, textile, automobile, home appliance, construction and other industries. In the production process of polypropylene, especially in the polymerization reaction, devolatilization (removal of unreacted monomers and volatile substances), material conveying and post-processing, a large amount of tail gas will be generated. These tail gases usually contain unreacted propylene monomer, volatile organic compounds (VOC S ), catalyst residues and a small amount of harmful gases (such as CO, NO X , etc.). If not treated, these tail gases not only pollute the environment, but also threaten the health of the operators.

[0003] In the existing tail gas treatment process, the spray tower method is widely used. However, when the absorption liquid in the spray tower absorbs harmful substances in the tail gas, solid impurities (such as salts, colloids, etc.) often precipitate in the absorption liquid. These solid impurities accumulate in the tower for a long time and flow upward with the circulating absorption liquid. When the absorption liquid carrying impurities flows through the circulation pipeline and is transported upward to the spray head, the impurities are easily deposited in the pipeline, eventually causing the circulation pipeline to be blocked. This situation forces the device to shut down for maintenance, not only delaying the production process, but also reducing the overall work efficiency. SUMMARY

[0004] In order to overcome the above-mentioned shortcomings, the present application provides a tail gas environmental protection treatment device for polypropylene production and processing which can be heated.

[0005] Technical scheme: A tail gas environmental protection treatment device for polypropylene production and processing, comprising a rack, a spray cylinder is fixedly connected to the rack, a spray head and a filler layer are arranged in the spray cylinder, a circulation pipe and a foreign matter removal pipe are communicated with the spray cylinder, a gas conveying pipe is fixedly connected to the spray cylinder, and a heat exchange unit for heat exchange between flue gas and absorption liquid is arranged on the gas conveying pipe; the heat exchange unit comprises a plurality of heat exchange pipes arranged in a circumferential array, the heat exchange pipes are communicated with the gas conveying pipe, a collecting pipe is communicated with the heat exchange pipes, a variable diameter pipe is communicated with the collecting pipe, a transfer pipe is communicated with the variable diameter pipe, a plurality of exhaust pipes arranged in a circumferential array are communicated with the transfer pipe, and a plurality of exhaust holes arranged in a mirror image and linear array are arranged on the exhaust pipes.

[0006] In addition, it is particularly preferred that the transfer pipe is fixedly connected with a conical head for preventing the absorption liquid from being retained.

[0007] In addition, it is particularly preferred that the spray cylinder is provided with an exhaust ring, the exhaust pipes arranged in a circumferential array are in communication with the exhaust ring, and the exhaust ring is provided with exhaust holes arranged uniformly.

[0008] In addition, it is particularly preferred that the exhaust ring is fixed with a drainage ring, the drainage ring is provided with an annular inclined surface, and the annular inclined surface of the drainage ring is used to shield the exhaust holes on the exhaust ring.

[0009] In addition, it is particularly preferred that the exhaust pipes are fixed with mirror-image arranged drainage plates, and the drainage plates are used to shield the exhaust holes on the exhaust pipes.

[0010] In addition, it is particularly preferred that the separation mechanism for separating impurities is further included, the separation mechanism is arranged in the spray cylinder, the separation mechanism includes a sliding ring, the sliding ring is slidingly connected in the spray cylinder, the sliding ring is slidingly connected with sliding rods arranged in a circumferential array, the transfer pipe is slidingly connected with a fixed ring, the sliding rods arranged in a circumferential array are fixed to the fixed ring, the fixed ring is fixed with filter membranes arranged in a circumferential array, the filter membranes arranged in a circumferential array are staggered in a circumferential direction with the sliding rods arranged in a circumferential array, the filter membranes arranged in a circumferential array are fixed to each other with the sliding rods arranged in a circumferential array, the sliding ring is fixed with a first sliding frame, the first sliding frame is slidingly connected with the spray cylinder, the frame is fixed with a first electric push rod, and the first electric push rod is fixed at an extension end to the first sliding frame.

[0011] In addition, it is particularly preferred that the spray cylinder is provided with limit grooves arranged in a circumferential array, the limit grooves are wavy, and the sliding rods slide in adjacent limit grooves.

[0012] In addition, it is particularly preferred that the drainage mechanism for assisting heat exchange between absorption liquid and flue gas is further included, the drainage mechanism is arranged on the spray cylinder, the drainage mechanism includes a second sliding frame, the second sliding frame is slidingly connected to the spray cylinder, the second sliding frame is fixed with a drainage member, the drainage member is located between the heat exchange pipes arranged in a circumferential array, the frame is fixed with a second electric push rod, and the second electric push rod is fixed at an extension end to the second sliding frame.

[0013] In addition, it is particularly preferred that the drainage member is provided with a first inclined surface and a second inclined surface.

[0014] In addition, it is particularly preferred that the drainage member is fixed with a support member, and the support member is used to press the filter membrane.

[0015] Compared with the prior art, the present application has the beneficial effects that: the present application uses the cooperation of the heat exchange pipe and the variable diameter pipe, uses the tail gas to heat the absorption liquid, thereby improving the solubility of the salt impurities in the absorption liquid, reducing the probability of the condensation of the salt solid impurities in the absorption liquid, and thereby reducing the probability of the blockage of the circulating pipeline; the cooperation of the sliding rod and the filter membrane intercepts the impurities in the absorption liquid during normal operation, uses the form change and the backflush of the filter membrane to clean the filter membrane when the filter membrane is blocked, and simultaneously discharges the impurities, thereby reducing the probability of the impurities in the absorption liquid below the filter membrane; the cooperation of the drainage member and the filter membrane improves the heat exchange efficiency between the absorption liquid and the tail gas in the heat exchange pipe when the drainage member moves downward, and improves the impact force between the absorption liquid and the filter membrane when the drainage member moves upward, thereby improving the applicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0017] Figure 2 is a schematic diagram of the three-dimensional structure of the internal structure of the spray cylinder of the present application;

[0018] Figure 3 is a schematic diagram of the three-dimensional structure of the present application;

[0019] Figure 4 is a schematic diagram of the three-dimensional structure of the present application;

[0020] Figure 5 is a schematic diagram of the three-dimensional structure of the present application;

[0021] Figure 6 is a schematic diagram of the three-dimensional structure of the present application;

[0022] Figure 7 is a schematic diagram of the three-dimensional structure of the present application;

[0023] Figure 8 is a schematic diagram of the three-dimensional structure of the present application;

[0024] Figure 9 is a schematic diagram of the three-dimensional structure of the present application;

[0025] Figure 10 is a schematic diagram of the three-dimensional structure of the present application;

[0026] Figure 11 is a schematic diagram of the three-dimensional structure of the present application.

[0027] In the figure: 1, rack, 2, spray cylinder, 3, pipe, 4, circulating pipe, 5, gas pipe, 6, heat exchange pipe, 7, collecting pipe, 8, reducing pipe, 9, transfer pipe, 10, exhaust pipe, 11, conical head, 12, exhaust ring, 13, drainage ring, 14, drainage plate, 15, sliding ring, 16, sliding rod, 161, fixed ring, 17, filter membrane, 18, first sliding frame, 19, first electric push rod, 191, limit groove, 20, second sliding frame, 21, drainage member, 22, first inclined surface, 23, second inclined surface, 24, second electric push rod, 25, support. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. EMBODIMENT

[0029] As Figures 1-7The tail gas environmental protection treatment device for polypropylene production and processing is provided to solve the problem that the existing spray tower is easy to generate precipitate when treating polypropylene tail gas, thereby blocking the pipeline in the subsequent absorption liquid circulation process, forcing the device to shut down for maintenance, and delaying the production process. The device comprises a rack 1, the rack 1 is fixedly connected with a spray cylinder 2, the top of the spray cylinder 2 is provided with a discharge pipe for discharging the tail gas purified by spraying, the spray cylinder 2 is provided with a spray head and a filler layer (not shown in the figure), the side wall of the spray cylinder 2 is provided with a flange opening for filling the filler, the spray cylinder 2 is communicated with a removal pipe 3 and a circulation pipe 4, the removal pipe 3 is communicated with an external treatment system for periodically discharging the solid impurities generated in the spray tower, the circulation pipe 4 is communicated with an external circulation system, the external circulation system is communicated with the spray head in the spray cylinder 2, the spray cylinder 2 is fixedly connected with a gas conveying pipe 5, the gas conveying pipe 5 is communicated with an external gas supply system, the gas conveying pipe 5 is composed of an annular pipe and a straight pipe, the gas conveying pipe 5 is used for conveying tail gas, and the gas conveying pipe 5 is provided with a heat exchange unit for heat exchange between flue gas and absorption liquid; the heat exchange unit comprises circumferentially arrayed heat exchange pipes 6, the heat exchange pipe 6 is composed of a U-shaped pipe and a straight pipe, the distance between adjacent two heat exchange pipes 6 is equal to the distance of the middle gap of the U-shaped pipe part of the heat exchange pipe 6, so as to ensure uniform heat exchange, the U-shaped pipe part of the circumferentially arrayed heat exchange pipes 6 is communicated with the annular pipe part of the gas conveying pipe 5, the straight pipe parts of the circumferentially arrayed heat exchange pipes 6 are commonly communicated with a collecting pipe 7, the collecting pipe 7 is communicated with a variable diameter pipe 8, the inner diameter of the variable diameter pipe 8 gradually decreases from bottom to top (that is, the tail gas flow area gradually decreases), so as to accelerate the flow speed of the tail gas in the variable diameter pipe 8 (that is, to strengthen the heat exchange efficiency between the tail gas near the variable diameter pipe 8 and the absorption liquid), the variable diameter pipe 8 is communicated with a transfer pipe 9, the transfer pipe 9 is communicated with circumferentially arrayed exhaust pipes 10, the exhaust pipes 10 are provided with mirror image and linear arrayed exhaust holes, and the exhaust holes on the exhaust pipes 10 are all inclined downward, the upper side of the transfer pipe 9 is fixedly connected with a conical head 11 for preventing absorption liquid from stagnating, the spray cylinder 2 is provided with an exhaust ring 12, the circumferentially arrayed exhaust pipes 10 are all communicated with the exhaust ring 12, the exhaust ring 12 is provided with uniformly distributed exhaust holes, the upper side of the exhaust ring 12 is fixedly connected with a flow guide ring 13, the flow guide ring 13 is provided with an annular inclined surface, and the inner ring diameter of the annular inclined surface is smaller than the inner ring diameter of the exhaust ring 12 (that is, the inner side edge of the flow guide ring 13 protrudes inward), the annular inclined surface of the flow guide ring 13 is used for shielding the exhaust holes on the exhaust ring 12 and guiding the absorption liquid to flow downward, the exhaust pipes 10 are fixedly connected with two mirror image distributed flow guide plates 14, the flow guide plates 14 are used for shielding the exhaust holes on the exhaust pipes 10 and guiding the absorption liquid to flow downward, thereby reducing the probability of absorption liquid and solid impurities in the absorption liquid blocking the exhaust holes.

[0030] The working process of the treatment device in the embodiment is as follows:

[0031] Preparation: First, the impurity discharge pipe 3 is connected with the external treatment system, the circulating pipe 4 is connected with the external circulating system, the gas supply pipe 5 is connected with the external gas supply system, and then a certain amount of absorption liquid is injected into the spray cylinder 2 through the external circulating system and the circulating pipe 4 (the liquid level of the absorption liquid is higher than the heat exchange pipe 6 and lower than the exhaust ring 12), and at this time, the preparation is completed.

[0032] Treatment: Control the external gas supply system to inject high-temperature tail gas (hereinafter referred to as tail gas) into all heat exchange pipes 6 through the gas supply pipe 5, and the tail gas exchanges heat with the absorption liquid in the spray cylinder 2 after entering all heat exchange pipes 6, so that the absorption liquid in the spray cylinder 2 is heated, the solubility of salt impurities is improved, and the tail gas flows into the collecting pipe 7 after passing through the heat exchange pipe 6, and then flows into the transfer pipe 9 through the variable diameter pipe 8. Since the diameter of the variable diameter pipe 8 gradually decreases from bottom to top, the flow rate of the tail gas increases when flowing through the variable diameter pipe 8, so as to improve the heat exchange efficiency of the tail gas and the absorption liquid. The tail gas continues to flow into all exhaust pipes 10 and the exhaust ring 12, and finally flows out to the spray cylinder 2 through the exhaust holes uniformly distributed on the exhaust pipe 10 and the exhaust ring 12, and the tail gas flows upward.

[0033] At the same time of heating the absorption liquid in the spray cylinder 2, the external circulating system is started, and the heated absorption liquid in the spray cylinder 2 is transported to the spray head of the spray cylinder 2 by the external circulating system, so as to spray and treat the tail gas. In the process of use, the impurities are discharged through the impurity discharge pipe 3 at regular time, and the absorption liquid is supplemented into the spray cylinder 2 through the external circulating system at the same time, so as to maintain the concentration of the absorption liquid.

[0034] In the above spraying process, part of the absorption liquid of the absorption completed tail gas flows downward to the drainage ring 13, all exhaust pipes 10 and the conical head 11, and the absorption liquid flows downward under the guidance of the annular inclined surface of the drainage ring 13, the circulating pipe 4 and the conical head 11, so as to return to the absorption liquid in the lower part of the spray cylinder 2, thereby reducing the probability that the absorption liquid is evaporated and dried near the exhaust holes of the exhaust pipe 10 and the exhaust ring 12, causing the precipitation of fixed impurities to block the exhaust holes. Through the cooperation of the heat exchange pipe 6 and the variable diameter pipe 8, the solubility of part of the salt impurities (ammonium sulfate, etc.) in the absorption liquid is improved by heating the absorption liquid with the tail gas, thereby reducing the probability of condensation of salt solid impurities in the absorption liquid, thereby reducing the probability of blockage of the circulating pipeline. Embodiment

[0035] The tail gas environmental protection treatment device for polypropylene production and processing disclosed in this embodiment is further improved on the basis of embodiment 1.

[0036] The structure, connection relationship and working process of the treatment device in embodiment 1 are not described again, and the working principle of the following structure is mainly described, and the subsequent embodiments are the same.

[0037] As Figures 1-3 and Figures 8-10As shown, the device further comprises a separation mechanism for separating impurities, which is arranged in the spraying cylinder 2. The separation mechanism comprises a sliding ring 15 which is slidingly connected to the spraying cylinder 2 and dynamically sealed therebetween. The sliding ring 15 is slidingly connected with four sliding rods 16 arranged in an array in the circumferential direction. The sliding rods 16 are made of rigid material on the side close to the inner wall of the spraying cylinder 2, and are made of flexible material on the other side. The transfer pipe 9 is slidingly connected with a fixed ring 161 and dynamically sealed therebetween. The sliding rods 16 arranged in an array in the circumferential direction are fixedly connected with the fixed ring 161. The fixed ring 161 is fixedly connected with four filter membranes 17 arranged in an array in the circumferential direction. The filter membranes 17 are made of elastic material and can filter and absorb the solid impurities in the absorption liquid, so that only the absorption liquid can pass through. The filter membranes 17 arranged in an array in the circumferential direction are staggered with the sliding rods 16 arranged in an array in the circumferential direction in the circumferential direction. The filter membranes 17 arranged in an array in the circumferential direction are fixedly connected with the sliding rods 16 arranged in an array in the circumferential direction. The sliding ring 15 is located between the exhaust ring 12 and the liquid surface of the absorption liquid in the spraying cylinder 2. The sliding ring 15 is fixedly connected with a first sliding frame 18 which is slidingly connected with the spraying cylinder 2 and dynamically sealed therebetween. The rack 1 is fixedly connected with a first electric push rod 19. The first electric push rod 19 is fixedly connected with the first sliding frame 18 at the extension end thereof. The position of the sliding ring 15 in the spraying cylinder 2 can be changed by the extension and retraction of the extension end of the first electric push rod 19. The spraying cylinder 2 is provided with limiting grooves 191 arranged in an array in the circumferential direction. The limiting grooves 191 are in a wave shape, and the distance between adjacent limiting grooves 191 changes regularly from small to large and then from large to small. The sliding rods 16 slide in the adjacent limiting grooves 191.

[0038] The working process of the processing device in the embodiment is as follows:

[0039] In the process of falling of the absorption liquid, the falling absorption liquid falls on the filter membranes 17 of the sliding ring 15. The solid impurities in the absorption liquid are intercepted by the filter membranes 17, and the absorption liquid falls downward through the filter membranes 17 into the absorption liquid in the spraying cylinder 2.

[0040] With the increase of the use time of the filter membrane 17, the filter membrane 17 is gradually blocked by solid impurities, the extension end of the first electric push rod 19 is intermittently controlled to extend, the extension end of the first electric push rod 19 drives the sliding ring 15 and parts thereon to move downward through the first sliding frame 18, the sliding rods 16 move under the extrusion of the limiting grooves 191, when the two adjacent sliding rods 16 move oppositely, the filter membrane 17 between the two sliding rods 16 is wrinkled under the pressure, when the two adjacent sliding rods 16 move away from each other, the filter membrane 17 between the two sliding rods 16 is stretched to be taut, so that the filter membrane 17 presents a cycle state of wrinkle→taut→wrinkle, among the initial four filter membranes 17, the two filter membranes 17 oppositely at the oblique angle are wrinkled under the flexible extrusion of the sliding rods 16, while the other two filter membranes 17 oppositely at the oblique angle are taut under the flexible stretching of the sliding rods 16, and the four filter membranes 17 all present the cycle state, with the continuous movement of the sliding ring 15, the filter membrane 17 is switched between the taut state and the wrinkled state, so as to loosen the impurities attached to the filter membrane 17, and with the downward movement of the sliding ring 15, the filter membrane 17 sinks into the absorption liquid, the absorption liquid performs backflushing on the solid impurities from bottom to top, further enhancing the cleaning effect of the filter membrane 17, with the downward movement of the sliding rod 16 to the end of the limiting groove 191, the extension end of the first electric push rod 19 is controlled to stop moving, then the impurities accumulated on the filter membrane 17 are driven by the absorption liquid to be discharged through the impurity discharge pipe 3, after the discharge is completed (i.e. the liquid surface of the absorption liquid is lowered to the lower side of the filter membrane 17 at this time), the absorption liquid is supplemented into the spraying cylinder 2 through the external circulation system, so that the liquid surface is restored to the original position, at this time, the liquid supplementing is completed, the extension end of the first electric push rod 19 is controlled to retract, and the sliding ring 15 and parts thereon are reset synchronously, the sliding rod 16 cooperates with the filter membrane 17 to intercept the impurities in the absorption liquid in normal operation, and the filter membrane 17 is cleaned by the morphological change and backflushing of the filter membrane 17 when the filter membrane 17 is blocked, and the impurities are discharged at the same time, so as to reduce the probability of the impurities in the absorption liquid below the filter membrane 17. Embodiment

[0041] The polypropylene production and processing tail gas environmental protection treatment device disclosed in this embodiment is further improved on the basis of embodiment 2.

[0042] As Figures 1-3 , Figure 10 and Figure 11As shown, the device further comprises a flow guide mechanism for assisting the absorption liquid to exchange heat with the flue gas, the flow guide mechanism is arranged on the spraying cylinder 2, the flow guide mechanism comprises a second sliding frame 20, the second sliding frame 20 is slidingly connected to the spraying cylinder 2, and the two are dynamically sealed, the second sliding frame 20 is fixedly connected with a flow guide piece 21, the flow guide piece 21 is located between the circumferentially arrayed heat exchange pipes 6, the rack 1 is fixedly connected with a second electric push rod 24, the second end of the second electric push rod 24 is fixedly connected with the second sliding frame 20, the flow guide piece 21 is provided with a first inclined surface 22 and a second inclined surface 23, the first inclined surface 22 and the second inclined surface 23 are both inclined upward from inside to outside, so that when the flow guide piece 21 moves upward, the flow guide piece 21 converges the liquid to the middle part, and when the flow guide piece 21 moves downward, the flow guide piece 21 extrudes and diffuses the liquid to the circumferential side, the flow guide piece 21 is fixedly connected with a support piece 25, the support piece 25 is composed of four support columns and a circular ring, and the support piece 25 is used for extruding the filter membrane 17.

[0043] The working process of the processing device in the embodiment is as follows:

[0044] In the process of cleaning the filter membrane 17 by backwashing, the second end of the second electric push rod 24 is controlled to reciprocatingly extend and retract, the second end of the second electric push rod 24 drives the flow guide piece 21 to reciprocatingly move up and down through the second sliding frame 20, when the flow guide piece 21 moves downward, the absorption liquid below the flow guide piece 21 flows out from between the circumferentially arrayed heat exchange pipes 6, thereby enhancing the heat exchange efficiency between the absorption liquid and the tail gas in the heat exchange pipes 6 by forced flow, and when the flow guide piece 21 moves upward, the flow guide piece 21 extrudes and pushes the absorption liquid to move upward, cooperated with the downward movement of the filter membrane 17, thereby enhancing the impact force between the absorption liquid and the filter membrane 17 (i.e. enhancing the backwashing effect of the filter membrane 17).

[0045] In the process of discharging the impurities accumulated on the filter membrane 17 through the impurity discharge pipe 3, the second end of the second electric push rod 24 is controlled to retract, the second end of the second electric push rod 24 drives the flow guide piece 21 to move upward through the second sliding frame 20, the flow guide piece 21 drives the support piece 25 to move upward, thereby extruding the filter membrane 17, making the middle part of the filter membrane 17 "protrude" upward, thereby assisting the discharge of the impurities on the filter membrane 17, reducing the probability of the impurities remaining on the filter membrane 17, through the cooperation of the flow guide piece 21 and the filter membrane 17, the heat exchange efficiency between the absorption liquid and the tail gas in the heat exchange pipes 6 is improved when the flow guide piece 21 moves downward, and the impact force between the absorption liquid and the filter membrane 17 is improved when the flow guide piece 21 moves upward, thereby improving the applicability of the device.

[0046] The embodiments of the application are described in detail above with reference to the drawings, but the application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A waste gas environmental protection treatment device for polypropylene production and processing, characterized in that: It includes a frame (1), a spray cylinder (2) fixedly connected to the frame (1), a spray head and a packing layer are provided inside the spray cylinder (2), the spray cylinder (2) is connected to a discharge pipe (3) and a circulation pipe (4), the spray cylinder (2) is fixedly connected to a gas supply pipe (5), and a heat exchange unit for exchanging heat between flue gas and absorbent liquid is provided on the gas supply pipe (5); The heat exchange unit includes heat exchange tubes (6) arranged in a circumferential array. All heat exchange tubes (6) arranged in a circumferential array are connected to the gas transmission pipe (5). The heat exchange tubes (6) arranged in a circumferential array are connected to a collecting pipe (7). The collecting pipe (7) is connected to a reducing pipe (8). The reducing pipe (8) is connected to a transfer pipe (9). The transfer pipe (9) is connected to an exhaust pipe (10) arranged in a circumferential array. The exhaust pipe (10) is provided with exhaust holes arranged in a mirror and linear array. It also includes a separation mechanism for separating impurities, which is disposed inside the spray cylinder (2). The separation mechanism includes a sliding ring (15), which is slidably connected inside the spray cylinder (2). The sliding ring (15) is slidably connected to a circumferentially arrayed sliding rod (16). The transfer pipe (9) is slidably connected to a fixed ring (161). The circumferentially arrayed sliding rod (16) is fixedly connected to the fixed ring (161). A circumferentially arrayed filter membrane (1) is fixedly connected to the fixed ring (161). 7) The filter membrane (17) and the sliding rod (16) distributed in a circumferential array are staggered in the circumferential direction. The filter membrane (17) and the sliding rod (16) are fixedly connected to each other. The sliding ring (15) is fixedly connected to the first sliding frame (18). The first sliding frame (18) is slidably connected to the spray cylinder (2). The frame (1) is fixedly connected to the first electric push rod (19). The telescopic end of the first electric push rod (19) is fixedly connected to the first sliding frame (18).

2. The exhaust gas environmental protection treatment device for polypropylene production and processing according to claim 1, characterized in that: The transfer tube (9) is fixed with a conical head (11) to prevent the absorbent liquid from stagnating.

3. The exhaust gas environmental protection treatment device for polypropylene production and processing according to claim 1, characterized in that: The spray cylinder (2) is provided with an exhaust ring (12), and the exhaust pipes (10) arranged in a circumferential array are all connected to the exhaust ring (12). The exhaust ring (12) is provided with uniformly distributed exhaust holes.

4. The exhaust gas environmental protection treatment device for polypropylene production and processing according to claim 3, characterized in that: The exhaust ring (12) is fixedly connected to a flow guide ring (13), and the flow guide ring (13) is provided with an annular inclined surface. The annular inclined surface on the flow guide ring (13) is used to block the exhaust hole on the exhaust ring (12).

5. The exhaust gas environmental protection treatment device for polypropylene production and processing according to claim 1, characterized in that: A mirror-distributed guide plate (14) is fixed to the exhaust pipe (10), and the guide plate (14) is used to block the exhaust hole on the exhaust pipe (10).

6. The exhaust gas environmental protection treatment device for polypropylene production and processing according to claim 5, characterized in that: The spray cylinder (2) is provided with circumferentially arrayed limiting grooves (191), the limiting grooves (191) are wavy, and the sliding rod (16) slides in adjacent limiting grooves (191).

7. The exhaust gas environmental protection treatment device for polypropylene production and processing according to claim 1, characterized in that: It also includes a flow guiding mechanism for assisting heat exchange between the absorbent liquid and the flue gas. The flow guiding mechanism is set on the spray cylinder (2). The flow guiding mechanism includes a second sliding frame (20). The second sliding frame (20) is slidably connected to the spray cylinder (2). The second sliding frame (20) is fixedly connected to a flow guiding component (21). The flow guiding component (21) is located between the heat exchange tubes (6) distributed in a circumferential array. The frame (1) is fixedly connected to a second electric push rod (24). The telescopic end of the second electric push rod (24) is fixedly connected to the second sliding frame (20).

8. The exhaust gas environmental protection treatment device for polypropylene production and processing according to claim 7, characterized in that: The drainage component (21) is provided with a first inclined surface (22) and a second inclined surface (23).

9. The exhaust gas environmental protection treatment device for polypropylene production and processing according to claim 8, characterized in that: A support member (25) is fixedly connected to the draining member (21), and the support member (25) is used to squeeze the filter membrane (17).

Images