Spraying type polypropylene production tail gas recovery device

Abstract

The invention relates to the technical field of ecological protection, in particular to a spraying type polypropylene production tail gas recovery device. Comprising a support, the support is fixedly connected with a tank body, the tank body is internally provided with a spraying module and a filler layer, the bottom in the tank body is fixedly connected with a separation frame, the separation frame divides the bottom of the tank body into a plurality of cavities, the tank body is provided with a circulation assembly used for recycling spraying liquid, and the tank body is internally provided with a blocking assembly used for blocking the cavities. A position changing assembly used for changing the position of the suction spraying liquid is arranged in the cavity. The bottom of the tank body is divided into a plurality of cavities through the separation frame, two of the cavities are in a spray liquid receiving state and a spray liquid discharging state respectively, the other cavities are in an impurity precipitation state, and the states of the cavities are switched regularly, that is, the spray liquid is circulated after the impurities in the spray liquid in the cavities are precipitated, so that the spray liquid can be recycled, and the spray liquid can be recycled. The probability that impurities block the communicating pipe is reduced, and maintenance times are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of ecological protection, and in particular to a spray-type polypropylene production tail gas recovery device. Background Art

[0002] The tail gas generated during the polypropylene production process usually contains incompletely reacted propylene gas, volatile organic compounds (VOCs), suspended particulate matter and a small amount of acidic or alkaline gases. If it is discharged directly without treatment, it will not only pollute the atmospheric environment, but may also endanger the balance of the ecosystem and human health. Therefore, the tail gas must undergo efficient purification treatment to ensure that it can be discharged only after meeting the standards. At present, spray towers are widely used in industry to treat such waste gas, which is particularly suitable for removing particulate matter, soluble organic matter and harmful gases. Among them, the circulating spray tower significantly improves the purification efficiency because the spray liquid can be recycled, while reducing the consumption of spray liquid and the amount of wastewater generated. It has obvious advantages in energy conservation and emission reduction, and helps promote green manufacturing and ecological environmental protection, and achieve the coordination and unity of economic benefits and environmental sustainable development.

[0003] During the operation of the circulating spray tower, it is necessary to continuously pump the spray liquid from the bottom of the tower for recycling. However, since the spray liquid will carry a large amount of solid impurities in the process of absorbing pollutants, in order to prevent these impurities from entering the circulation system and clogging the spray head, a filter device is usually installed at the bottom of the tower to intercept impurities. Despite this, in long-term operation, the surface of the filter device is prone to clogging due to the accumulation of impurities, resulting in poor circulation of the spray liquid, affecting the purification effect, and requiring frequent shutdowns for cleaning, reducing the continuity of system operation and treatment efficiency. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a spray-type polypropylene production tail gas recovery device.

[0005] Technical solution: A spray-type polypropylene production tail gas recovery device, including a bracket, the bracket is fixedly connected to a tank body, the top and side walls of the tank body are respectively fixedly connected and connected with an air outlet pipe and an air inlet pipe, a spray module and a packing layer are provided in the tank body, the bottom of the tank body is fixedly connected to a partition frame, the partition frame divides the bottom of the tank body into a plurality of cavities, the bottom of the tank body is fixedly connected with sewage pipes with the same number as the cavities, the sewage pipes of the tank body are connected with the corresponding cavities, a circulation component for recycling the spray liquid is provided on the tank body, a sealing component for sealing the cavity is provided in the tank body, and a displacement component for changing the position of sucking the spray liquid is provided in the cavity.

[0006] As a preferred technical solution of the present invention, the number of the cavities is greater than or equal to three, which is used to prolong the precipitation time of impurities in the spray liquid.

[0007] As a preferred technical solution of the present invention, the circulation component includes a liquid feeding pump, which is fixedly connected to the bracket, and the tank body is fixedly connected with a docking pipe. The output end of the liquid feeding pump is connected with the spray module through the docking pipe, and the tank body is fixedly connected with connecting pipes with the same number as the cavities, and the connecting pipes are connected with the corresponding cavities. The input end of the liquid feeding pump is fixedly connected and connected with a connecting pipe, and all the connecting pipes and the connecting pipes are fixedly connected to a four-way solenoid valve.

[0008] As a preferred technical solution of the present invention, the sealing assembly includes a servo motor, the servo motor is fixedly connected to the tank body, the output shaft of the servo motor is fixedly connected to a rotating shaft, the rotating shaft is connected to the tank body through rotation, the rotating shaft is connected to the partition frame through rotation, the rotating shaft is fixedly connected to a sealing plate, and the sealing plate has a fan-shaped notch for allowing the spray liquid to enter one of the cavities.

[0009] As a preferred technical solution of the present invention, the blocking plate is fixedly connected to a guide plate, the guide plate is located at the fan-shaped notch of the blocking plate, and there is a gap between the blocking plate and the tank body and the guide plate.

[0010] As a preferred technical solution of the present invention, the upper sides of the blocking plate and the guide plate are both provided with inclined surfaces for quickly guiding the spray liquid.

[0011] As a preferred technical solution of the present invention, the tank body and the partition frame are fixedly connected with wall racks having the same number as the cavities. The wall racks are located at the top of the corresponding cavities and are used to make the spray liquid flow along the inner wall of the cavity.

[0012] As a preferred technical solution of the present invention, the transposition component includes a fixed shaft, the fixed shaft is fixedly connected to the tank body, the fixed shaft is slidably connected to a float, the float is fixedly connected to a liquid extraction head, the liquid extraction head is fixedly connected to the corresponding connecting pipe and is connected with a flexible pipe, and a recoil component for recoil itself is provided in the liquid extraction head.

[0013] As a preferred technical solution of the present invention, the backflush assembly includes a backflush piston, the upper radius of the liquid extraction head is larger than the lower radius, the backflush piston is sealingly and slidingly connected to the upper part of the liquid extraction head, and an elastic member is provided between the backflush piston and the liquid extraction head.

[0014] As a preferred technical solution of the present invention, a trigger block is fixedly connected to the top of the fixed shaft, and the trigger block is used to push the adjacent recoil piston to slide along the liquid pumping head.

[0015] The present invention has the following beneficial effects: 1. The present invention divides the bottom of the tank into several cavities through a partition frame, so that two of the cavities are respectively in a receiving state and a discharging state of the spray liquid, and the remaining cavities are in a precipitation state of impurities, and the state of the cavity is switched regularly, that is, the impurities in the spray liquid in the cavity are precipitated and then the spray liquid is circulated, thereby reducing the probability of impurities clogging the connecting pipe and reducing the number of maintenance times.

[0016] 2. The spray liquid sprayed from the spray module is diverted by the sealing plate and the guide plate, so that the spray liquid adheres to the inner wall of the corresponding cavity and flows downward, and converges with the spray liquid in the corresponding cavity, reducing the liquid surface disturbance caused by the spray liquid entering the cavity and increasing the precipitation rate of impurities in the cavity.

[0017] 3. When sucking the spray liquid in the cavity after sedimentation, the float drives the pumping head to suck the spray liquid in the corresponding cavity from top to bottom, thereby reducing the impurity content sucked during the circulation of the spray liquid, and extending the sedimentation time of impurities in the spray liquid in the lower part of the cavity, reducing the probability of blockage of the pumping head.

[0018] 4. The float drives the position of the pumping head to change, so that the trigger block drives the recoil piston to push the spray liquid out from the bottom of the pumping head. The spray liquid recoils the pumping head, further reducing the probability of the pumping head being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the tank body of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the partition frame and cavity of the present invention; Figure 4 It is a schematic cross-sectional view of the three-dimensional structure of the partition frame of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the blocking plate and the guide plate of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the fixed shaft and float of the present invention; Figure 7 Schematic diagram of the three-dimensional structure of the liquid extraction head of the present invention; Figure 8 It is a schematic cross-sectional view of the three-dimensional structure of the liquid extraction head of the present invention.

[0020] Marked in the figure: 1- bracket, 2- tank body, 3- spray module, 4- packing layer, 5- partition frame, 6- cavity, 201- liquid delivery pump, 202- docking pipe, 203- connecting pipe, 204- connecting pipe, 205- four-way solenoid valve, 301- servo motor, 302- rotating shaft, 303- sealing plate, 304- guide plate, 305- wall bracket, 401- fixed shaft, 402- float, 403- liquid extraction head, 404- flexible tube, 501- recoil piston, 502- elastic part, 503- trigger block. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] During the operation of the circulating spray tower, spray liquid needs to be continuously extracted from the bottom of the tower for recycling. Since the spray liquid will carry a large amount of solid impurities when absorbing pollutants, in order to prevent them from entering the circulation system and clogging the spray head, a filter device is usually installed at the bottom of the tower to intercept impurities. However, after long-term operation, the filter device is prone to clogging due to the accumulation of impurities, resulting in poor circulation of the spray liquid, affecting the purification efficiency, and increasing the frequency of shutdown and cleaning, reducing the continuity of system operation and treatment efficiency. Example

[0023] This embodiment discloses a spray-type polypropylene production tail gas recovery device for purifying polypropylene tail gas.

[0024] like Figures 1-4 As shown, it includes a bracket 1, which is fixedly connected to a tank body 2. The top and side walls of the tank body 2 are respectively fixedly connected and connected with an outlet pipe and an inlet pipe. The outlet pipe is used to discharge the purified gas, and the inlet pipe is used to inject the tail gas generated by the preparation of polypropylene into the tank body 2 (hereinafter directly explained as tail gas). Two spray modules 3 and two packing layers 4 are arranged in the tank body 2. The two spray modules 3 and the two packing layers 4 are staggered, and the spray module 3 is on the upper side. The bottom of the tank body 2 is fixedly connected to a partition frame 5. The inlet pipe is located above the partition frame 5. The partition frame The bottom of the tank body 2 is divided into a plurality of cavities 6, the number of which is greater than or equal to three, for extending the precipitation time of impurities in the spray liquid. In this application, there are three cavities 6, namely, the front, back, and right cavities. The bottom of the tank body 2 is fixedly connected with drainage pipes having the same number as the cavities 6. The three drainage pipes of the tank body 2 are connected to the corresponding cavities 6. The drainage pipes are used to discharge solid impurities deposited in the corresponding cavities 6. The tank body 2 is provided with a circulation component for recycling the spray liquid, a blocking component for blocking the cavity 6 is provided in the tank body 2, and a position change component for changing the position of sucking the spray liquid is provided in the cavity 6.

[0025] like Figure 1-Figure 3 and Figure 6 As shown, the circulation component includes a liquid feeding pump 201, which is fixedly connected to the right side of the bracket 1. The tank body 2 is fixedly connected with a docking pipe 202. The output end of the liquid feeding pump 201 is connected to the two spray modules 3 through the docking pipe 202. The bottom of the tank body 2 is fixedly connected with three connecting pipes 203. A certain distance is left between the connecting pipe 203 and the bottom of the tank body 2 to leave a precipitation space for impurities. The three connecting pipes 203 are respectively connected to the corresponding cavity 6. The input end of the liquid feeding pump 201 is fixedly connected and connected with a connecting pipe 204. The connecting pipe 204 is a T-shaped pipe. It is used to connect the three connecting pipes 203 with the docking pipe 202 through the liquid feeding pump 201, and at the same time, spray liquid can be injected through the connecting pipe 204. All the connecting pipes 203 and the connecting pipe 204 are fixedly connected with a four-way solenoid valve 205. The four-way solenoid valve 205 is used to control the connection between any connecting pipe 203 and the connecting pipe 204. The spray liquid in the cavity 6 can enter the two spray modules 3 along the connecting pipe 203, the four-way solenoid valve 205, the connecting pipe 204, the liquid feeding pump 201 and the docking pipe 202, and fall from the spray module 3 into the cavity 6. This process is the recycling of the spray liquid.

[0026] like Figure 3-Figure 5 As shown, the blocking component includes a servo motor 301, which is fixedly connected to the bottom of the tank body 2, and the output shaft of the servo motor 301 is fixedly connected to the rotating shaft 302, which passes through and is rotatably connected to the bottom of the tank body 2, and the rotating shaft 302 passes through and is rotatably connected to the partition frame 5, and the rotating shaft 302 is fixedly connected to a blocking plate 303 that fits the top of the partition frame 5, and the blocking plate 303 has a fan-shaped notch, which can block the two cavities 6 at the same time, so that the spray liquid sprayed by the spray module 3 enters one of the cavities 6, and the initial blocking plate 303 blocks the front and rear cavities 6, and the front and rear cavities 6 are filled with spray liquid, while the cavity 6 on the right side does not store spray liquid, and at the same time, the connecting pipe 204 is connected to the front connecting pipe 203 through the four-way solenoid valve 205, and the blocking plate 303 is fixed. It is connected with a guide plate 304, which is located at the fan-shaped notch of the sealing plate 303. There is a gap between the sealing plate 303 and the tank body 2 and the guide plate 304. The overall trajectory of the gap is fan-shaped, which is used to make the spray liquid falling from the spray module 3 flow downward along the inner wall of the cavity 6 and converge with the spray liquid in the cavity 6. The upper sides of the sealing plate 303 and the guide plate 304 are both provided with inclined surfaces, which are used to quickly guide the spray liquid into the cavity 6. The tank body 2 and the partition frame 5 are jointly fixedly connected with the same number of wall racks 305 as the cavity 6. The top and bottom of the wall rack 305 are both provided with inclined surfaces. The wall rack 305 is located at the top of the corresponding cavity 6, which is used to make the spray liquid flow along the inclined surface of the wall rack 305, and flow along the wall rack 305 to the inner wall of the cavity 6, so that the spray liquid flows along the inner wall of the cavity 6.

[0027] Working principle: When the tail gas needs to be recovered and processed, the tail gas is injected into the tank body 2 through the air inlet pipe, and the liquid feeding pump 201 is turned on at the same time. The liquid feeding pump 201 extracts the spray liquid in the front cavity 6, so that the spray liquid enters the connecting pipe 204 along the adjacent connecting pipe 203, and enters the docking pipe 202 along the connecting pipe 204 through the liquid feeding pump 201. The spray liquid in the docking pipe 202 enters the two spray modules 3. The spray module 3 sprays the spray liquid, and the spray liquid falls downward. During this period, part of the spray liquid adheres to the packing layer 4. The tail gas passes through the two packing layers 4 and is finally discharged along the air outlet pipe at the top of the tank body 2. During this period, the particulate matter and acidic gas in the tail gas are dissolved in the spray liquid and fall downward into the cavity 6 on the right. This cycle is repeated until the spray liquid in the front cavity 6 is extracted to the bottom, and the spray liquid in the right cavity 6 is full.

[0028] When the spray liquid in the right cavity 6 is full, the output shaft of the servo motor 301 drives the sealing plate 303 to rotate through the rotating shaft 302, so that the sealing plate 303 is converted from blocking the front and rear cavities 6 to blocking the right and rear cavities 6. At this time, the cavity 6 on the front side is in a state of receiving the spray liquid. At the same time, the four-way solenoid valve 205 switches the connection direction, so that the connecting pipe 203 on the rear side is connected with the connecting pipe 204. At this time, solid particles and other impurities in the spray liquid in the right cavity 6 begin to settle downward, and the spray liquid in the rear cavity 6 begins to enter the spray module 3 and flow downward and enter the cavity 6 on the front side. When the spray liquid in the rear cavity 6 purifies the exhaust gas and is transferred to the front cavity 6, the output shaft of the servo motor 301 drives the sealing plate 303 to rotate through the rotating shaft 302, so that the sealing plate 303 The blocking plate 303 is converted from blocking the two right cavities 6 at the rear to blocking the two right cavities 6 at the front, so that the impurities in the spray liquid in the front cavity 6 begin to settle downward, and the four-way solenoid valve 205 connects the connecting pipe 203 on the right with the connecting pipe 204, and the rear cavity 6 is in a state of receiving the spray liquid. The cycle continues in this way, and the bottom of the tank body 2 is divided into several cavities 6 by the partition frame 5, so that two of the cavities 6 are in a state of receiving and discharging the spray liquid, and the remaining cavities 6 are in a state of precipitation of impurities, that is, the impurities in the spray liquid in the cavity 6 are precipitated and then circulated, reducing the probability of impurities clogging the connecting pipe 203 and reducing the number of maintenance times of the device. When it is necessary to stop the purification of the exhaust gas, the liquid delivery pump 201 is turned off and the injection of the exhaust gas is stopped. When the exhaust gas purification is needed again, the above steps are repeated.

[0029] In the above process, the spray liquid sprayed by the spray module 3 will fall to the upper side of the sealing plate 303 and the guide plate 304, and the spray liquid flows along the inclined surface on the sealing plate 303 and the guide plate 304, and enters the corresponding cavity 6 through the gap formed between the sealing plate 303 and the tank body 2 and the guide plate 304. The spray liquid flows downward along the gap and follows the inner wall of the cavity 6 under the guidance of the wall frame 305, that is, the outside of the partition frame 5 and the tank body 2 flows downward and converges into the spray liquid in the corresponding cavity 6. The spray liquid sprayed by the spray module 3 is guided by the sealing plate 303 and the guide plate 304, so that the spray liquid flows downward along the inner wall of the corresponding cavity 6 and converges with the spray liquid in the corresponding cavity 6, thereby reducing the liquid surface disturbance formed by the spray liquid entering the cavity 6 and increasing the precipitation rate of impurities in the cavity 6.

[0030] When the impurities in the cavity 6 accumulate to a certain height, they need to be cleaned (the impurity accumulation height cannot be higher than the height of the corresponding connecting pipe 203). There are two cleaning methods. First, direct all-round shutdown cleaning can be performed. The impurities in the three cavities 6 can be directly cleaned synchronously, so that the spray liquid carrying impurities is discharged along the bottom drain pipe, and new spray liquid is injected from the connecting pipe 204; second, non-stop cleaning is performed. When the spray liquid in the cavity 6 where impurities need to be cleaned is sucked out, the sealing plate 303 does not change the two blocked cavities 6, and the four-way solenoid valve 205 is switched to the connected state with the connecting pipe 203 in the cavity 6 in the spray liquid receiving state, and the cycle is directly performed until the impurities in the cavity 6 to be cleaned are processed. Then, according to the above steps, the spray liquid receiving state of the cavity 6 is opened in turn, and the impurities in the remaining cavities 6 are cleaned in the same way, until the cleaning is completed. Example

[0031] This embodiment discloses a spray-type polypropylene production tail gas recovery device, which is further improved on the basis of Example 1.

[0032] like Figure 3 、 Figure 6 and Figure 7 As shown, the transposition component includes a fixed shaft 401, which is fixedly connected to the bottom of the tank body 2, and the fixed shaft 401 is slidably connected to a float 402. In the sliding range of the fixed shaft 401, the top of the float 402 will not exceed the upper side of the partition frame 5, and the bottom will not be lower than the height of the connecting pipe 203. The material of the float 402 is polyethylene, and the float 402 is fixedly connected to a liquid extraction head 403. The lower part of the liquid extraction head 403 is provided with evenly distributed through holes, and the outside of the lower part of the liquid extraction head 403 is wrapped with a filter cloth for blocking impurities (not shown in the figure), the bottom of the liquid extraction head 403 is fixedly connected to the corresponding connecting pipe 203 and is connected with a flexible tube 404, and a recoil component for recoil itself is provided in the liquid extraction head 403.

[0033] like Figure 3 and Figure 6-Figure 8 As shown, the backflush assembly includes a backflush piston 501, and the upper radius of the liquid extraction head 403 is larger than the lower radius, which increases the amount of spray liquid pushed by the backflush piston 501, and is used to increase the impact force of the backflush piston 501 when pushing the spray liquid to recoil the liquid extraction head 403, and reduce the probability of the liquid extraction head 403 being blocked. The backflush piston 501 is sealingly and slidably connected to the top of the liquid extraction head 403, and an elastic member 502 is provided between the backflush piston 501 and the liquid extraction head 403. The elastic member 502 is a tension spring, which is used to drive the backflush piston 501 to reset. A trigger block 503 is fixedly connected to the top of the fixed shaft 401, and the trigger block 503 is used to push the adjacent backflush piston 501 to slide along the liquid extraction head 403, thereby causing the backflush piston 501 to push the spray liquid to recoil the filter cloth outside the liquid extraction head 403.

[0034] Working principle: When the liquid delivery pump 201 needs to pump the spray liquid in the corresponding cavity 6 for circulation, the spray liquid in the corresponding cavity 6 enters from the liquid pumping head 403 and enters the corresponding connecting pipe 203 along the flexible tube 404. Initially, the spray liquid in the cavity 6 is in a full state. At this time, the float 402 is at the top of the fixed shaft 401 under the action of the spray liquid. As the liquid delivery pump 201 gradually pumps the spray liquid in the cavity 6, the liquid level in the cavity 6 gradually decreases. At the same time, the float 402 drives the liquid pumping head 403 on it to gradually decrease with the liquid level, so that the suction position of the spray liquid of the liquid pumping head 403 gradually follows the change of the liquid level, that is, the liquid pumping head 403 pumps the spray liquid in the corresponding cavity 6 from top to bottom. After a certain period of sedimentation, the cavity is filled. 6, the impurity content in the spray liquid in the upper half of the cavity 6 is low, which can reduce the probability of the liquid extraction head 403 being blocked and prolong the precipitation time of impurities in the spray liquid in the lower part of the cavity 6, so as to continue until the float 402 slides to the bottom of the fixed shaft 401 (the float 402 at this position is at a certain distance from the bottom of the tank body 2 for the precipitation of impurities). When the cavity 6 is in the receiving state of the spray liquid flow, the liquid level of the spray liquid in the cavity 6 gradually rises, and the liquid level drives the float 402 to slide upward along the fixed shaft 401, so as to continue until the spray liquid in the cavity 6 is full, and the float 402 drives the liquid extraction head 403 to return to the top of the fixed shaft 401. When the spray liquid in the cavity 6 needs to be pumped again, the above steps are repeated.

[0035] When the float 402 drives the liquid extraction head 403 to follow the liquid level in the cavity 6, the recoil piston 501 in the liquid extraction head 403 gradually separates from the trigger block 503 when the float 402 drives the liquid extraction head 403 to move downward. During the suction process of the liquid feeding pump 201, negative pressure is formed inside the liquid extraction head 403. The negative pressure force overcomes the pulling force of the elastic member 502, making it impossible for the recoil piston 501 to reset upward. When the cavity 6 is in the receiving state of the spray liquid, the liquid extraction head 403 in the cavity 6 is not affected by the extraction of the liquid feeding pump 201. At this moment, the elastic member 502 drives the recoil piston 501 The backflush piston 501 moves downward along the liquid extraction head 403 , and the elastic member 502 stretches, and the backflush piston 501 pushes the spray liquid from the inside of the liquid extraction head 403 to the outside, and backflushes the impurities on the filter cloth outside the liquid extraction head 403 , so that the impurities attached to the filter cloth outside the liquid extraction head 403 are separated from it.

[0036] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, can make equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A spray-type polypropylene production tail gas recovery device, comprising a bracket (1), wherein the bracket (1) is fixedly connected to a tank body (2), wherein the top and side walls of the tank body (2) are respectively fixedly connected and communicated with an air outlet pipe and an air inlet pipe, and a spray module (3) and a packing layer (4) are provided in the tank body (2), wherein the device is characterized in that: The bottom of the tank body (2) is fixedly connected to a partition frame (5), and the partition frame (5) divides the bottom of the tank body (2) into a plurality of cavities (6). The bottom of the tank body (2) is fixedly connected to sewage pipes having the same number as the cavities (6). The sewage pipes of the tank body (2) are communicated with the corresponding cavities (6). A circulation component for recycling the spray liquid is provided on the tank body (2), a blocking component for blocking the cavities (6) is provided in the tank body (2), and a transposition component for changing the position of sucking the spray liquid is provided in the cavity (6).

2. A spray-type polypropylene production tail gas recovery device according to claim 1, characterized in that: The number of the cavities (6) is greater than or equal to three, and is used to prolong the precipitation time of impurities in the spray liquid.

3. A spray-type polypropylene production tail gas recovery device according to claim 1, characterized in that: The circulation component comprises a liquid-feeding pump (201), the liquid-feeding pump (201) is fixedly connected to the bracket (1), the tank body (2) is fixedly connected with a butt-joint pipe (202) in a through-type manner, the output end of the liquid-feeding pump (201) is communicated with the spray module (3) via the butt-joint pipe (202), the tank body (2) is fixedly connected with the same number of connecting pipes (203) as the number of the cavities (6), the connecting pipes (203) are communicated with the corresponding cavities (6), the input end of the liquid-feeding pump (201) is fixedly connected and communicated with a connecting pipe (204), and all the connecting pipes (203) and the connecting pipes (204) are fixedly connected to a four-way solenoid valve (205).

4. A spray-type polypropylene production tail gas recovery device according to claim 3, characterized in that: The blocking assembly comprises a servo motor (301), the servo motor (301) is fixedly connected to the tank body (2), the output shaft of the servo motor (301) is fixedly connected to a rotating shaft (302), the rotating shaft (302) is connected to the tank body (2) in a rotational manner, the rotating shaft (302) is connected to the partition frame (5) in a rotational manner, the rotating shaft (302) is fixedly connected to a blocking plate (303), and the blocking plate (303) has a fan-shaped notch for allowing the spray liquid to enter one of the cavities (6).

5. A spray-type polypropylene production tail gas recovery device according to claim 4, characterized in that: The blocking plate (303) is fixedly connected to a guide plate (304), the guide plate (304) being located at a fan-shaped notch of the blocking plate (303), and a gap exists between the blocking plate (303) and the tank body (2) and the guide plate (304).

6. A spray-type polypropylene production tail gas recovery device according to claim 5, characterized in that: The upper sides of the blocking plate (303) and the guide plate (304) are both provided with inclined surfaces for quickly guiding the spray liquid.

7. A spray-type polypropylene production tail gas recovery device according to claim 4, characterized in that: The tank body (2) and the partition frame (5) are fixedly connected together with wall-attached frames (305) having the same number as the cavities (6). The wall-attached frames (305) are located at the top of the corresponding cavities (6) and are used to allow the spray liquid to flow along the inner wall of the cavity (6).

8. A spray-type polypropylene production tail gas recovery device according to claim 7, characterized in that: The transposition component includes a fixed shaft (401), the fixed shaft (401) is fixedly connected to the tank body (2), the fixed shaft (401) is slidably connected to a float (402), the float (402) is fixedly connected to a liquid extraction head (403), the liquid extraction head (403) is fixedly connected to the corresponding connecting pipe (203) and is connected to a flexible pipe (404), and a recoil component for recoil itself is provided in the liquid extraction head (403).

9. A spray-type polypropylene production tail gas recovery device according to claim 8, characterized in that: The backflush assembly includes a backflush piston (501), the upper radius of the liquid extraction head (403) is larger than the lower radius, the backflush piston (501) is sealingly and slidably connected to the upper part of the liquid extraction head (403), and an elastic member (502) is provided between the backflush piston (501) and the liquid extraction head (403).

10. A spray-type polypropylene production tail gas recovery device according to claim 9, characterized in that: A trigger block (503) is fixedly connected to the top of the fixed shaft (401), and the trigger block (503) is used to push the adjacent recoil piston (501) to slide along the liquid extraction head (403).

Images