Segmented purification tower for fluoride-containing chemical tail gas

Abstract

The invention relates to the field of waste gas treatment, in particular to a fluoride-containing chemical tail gas sectional type purification tower which comprises a dry type waste gas purification tower, a connecting cover and the like. The left side and the right side of the dry type waste gas purification tower are each fixedly connected with a connecting cover. According to the invention, the filter frame is divided into a plurality of storage areas through the partition plates, so that the adsorbent in each area is not limited by the partition plates to have too large gaps or even gaps to influence waste gas purification, and the waste gas treatment capacity of the device during operation is improved; the waste gas is discharged back into the filter frame through the air bag and is secondarily filtered by using the adsorbent, so that the treatment effect of the device on the waste gas is improved, and meanwhile, the phenomenon that the utilization rate of the existing multi-layer adsorbent layer is low is avoided; dust particles in waste gas are sucked away through suction force generated by the air bag and then are filtered and intercepted through the filter membrane on the air bag, and the waste gas purification effect of the adsorbent in the using process is improved.

Description

Technical Field

[0001] The invention relates to the field of waste gas treatment, and in particular to a sectional purification tower for chemical tail gas containing fluoride. Background Art

[0002] There are two types of waste gas purification towers: wet type and dry type. The dry type purification tower fills the tower with adsorbents so that the waste gas is purified and adsorbed after passing through the adsorbents, thereby achieving the waste gas purification function. The existing dry purification towers are divided into two types: vertical and horizontal. Compared with the vertical type, the horizontal purification tower is easier for subsequent workers to maintain its interior, which is more convenient and convenient, and the overall stability is more stable than the vertical type. Since most adsorbents use raw materials such as activated carbon to treat waste gas, and the activated carbon raw materials filled in general purification towers are usually spherical particles and are smaller overall, but when filling the adsorbent in the tower, it is necessary to ensure that there are gaps between the adsorbents for the waste gas to circulate, and because the horizontal purification tower Due to the influence of the tower, the adsorbent will accumulate on the lower side of the purification tower due to gravity, resulting in too large a gap in the adsorbent on the upper side of the purification tower, or even hollowing out of the adsorbent on the upper side of the purification tower. This causes the exhaust gas to be easily discharged directly through the adsorbent layer, thereby affecting the treatment effect of the exhaust gas. At the same time, when the exhaust gas is filtered in multiple stages through multiple adsorbent layers, most of the exhaust gas is adsorbed by the adsorbent layer that is first contacted, resulting in poor use of subsequent adsorbent layers, and the adsorbent layer that is first contacted is very easy to cause blockage, and therefore needs to be replaced frequently, which results in not only a poor utilization rate of subsequent adsorbent layers, but also the need to remove multiple sections of adsorbent layers during the replacement and disassembly process, which is extremely inconvenient. Summary of the invention

[0003] In order to overcome the shortcomings of the existing horizontal purification tower causing adsorbent to accumulate on one side of the purification tower, resulting in a large gap between the adsorbents on the upper side of the purification tower, affecting the exhaust gas treatment effect, and treating the exhaust gas by means of multiple layers of adsorbents resulting in poor utilization of subsequent adsorbent layers and extremely inconvenient subsequent removal of multiple adsorbent layers, the present invention provides a segmented purification tower for chemical exhaust containing fluoride.

[0004] The technical scheme of the present invention is: a fluoride-containing chemical tail gas segmented purification tower, including a dry waste gas purification tower and a filter; the dry waste gas purification tower is composed of a purification barrel, a connecting cover, an air inlet pipe, an air outlet pipe and a filter frame; the filter frame is filled with an adsorbent; an exhaust cavity is formed between the filter frame and the purification barrel, and the exhaust cavity is connected to the air outlet pipe; the air outlet pipe is connected to an external air extraction device; the left side of the air inlet pipe is connected to a filter; it also includes a partition, a pressure plate, a fixed plate, an air bag, a rotating assembly and an adjustment system; a plurality of partitions are arranged in the filter frame to prevent the adsorbent gap from being too large; the filter frame is connected to ... A rotating assembly is installed on the connecting cover to enable the adsorbent to evenly adsorb the exhaust gas; a number of pressing plates are arranged on the rotating assembly, and each pressing plate is attached to the outer side of the filter frame; a number of fixed plates are fixedly connected to the filter frame; an air bag is arranged between each adjacent pressing plate and fixed plate to improve the exhaust gas purification effect; a number of first one-way membranes are arranged on each air bag, and each first one-way membrane is opened toward the inside of the air bag; a number of second one-way membranes are arranged on each air bag, and each second one-way membrane is opened toward the filter frame; an adjustment system for adjusting and storing adsorbents of different thicknesses is arranged on the connecting cover.

[0005] Optionally, the rotating assembly includes a first connecting ring, a first electric slider, a second connecting ring, a second electric slider and a third connecting ring; a first connecting ring is fixedly connected to the opposite sides of the two connecting covers; a plurality of first electric sliders are slidably connected to each first connecting ring; all the first electric sliders located on the same first connecting ring are commonly fixedly connected to a second connecting ring that enables the adsorbent to uniformly adsorb exhaust gas; a plurality of second electric sliders are slidably connected to the opposite sides of the two second connecting rings; the opposite sides of the two second connecting rings are fixedly connected to the filter frame; all the second electric sliders located on the same second connecting ring are commonly fixedly connected to a third connecting ring; and the two third connecting rings are fixedly connected to all the pressure plates.

[0006] Optionally, it also includes a rotating frame; two third connecting rings are fixedly connected to a rotating frame; the rotating frame is provided with a plurality of kneading parts for improving the use effect of the adsorbent; and the rotating frame is fitted with the inner side of the filter frame.

[0007] Optionally, a filter membrane is arranged in each airbag.

[0008] Optionally, the entire rotating frame is coated with an anti-stick coating.

[0009] Optionally, the ends of the kneading parts on the rotating frame are all configured to be arc-shaped.

[0010] Optionally, the adjustment system includes a pull ring, a pull rope and a filter; a pull ring is slidably connected to the air intake pipe; another pull ring is slidably connected to the connecting cover on the right side through a connecting rod; each pull ring is fixedly connected to a number of pull ropes; a filter for adjusting the storage of adsorbents of different thicknesses is connected between each adjacent partition plate; the other end of the pull rope passes through the partition and is fixedly connected to the corresponding filter.

[0011] Optionally, each partition is fixedly connected to the filter screen via an elastic film.

[0012] Optionally, a swivel is also included; each connection cover is rotatably connected to a swivel to prevent the pull rope from getting knotted; each pull rope passes through the corresponding swivel and is fixed to the filter screen, and the pull rope is slidably connected to the swivel.

[0013] Optionally, each filter screen is configured to be in an arc shape.

[0014] Beneficial effects of the present invention: The present invention realizes the separation of the filter frame into multiple storage areas by the partition, so that the adsorbent in each area will not have too large gaps or even voids under the restriction of the partition to affect the exhaust gas purification, thereby improving the exhaust gas treatment capacity of the device during operation; The exhaust gas is discharged back into the filter frame through the air bag, and the exhaust gas is filtered twice by the adsorbent, thereby improving the treatment effect of the device on the exhaust gas, and avoiding the low utilization rate of the existing multi-layer adsorbent layer; The dust particles in the exhaust gas are sucked away by the suction force generated by the airbag, and then filtered and intercepted by the filter membrane on the airbag, thereby improving the exhaust gas purification effect of the adsorbent during use; The kneading part moves the adsorbent in the filter frame, so that the adsorbents are kneaded and moved, thereby avoiding the adsorbents from sticking to each other and clogging. At the same time, the adsorbent attached to the outer side of the filter frame can be kneaded to the inner side of the filter frame, thereby improving the exhaust gas treatment capacity of the device during operation; By adjusting the distance between the filter screen and the filter frame, the thickness of the chamber formed by the filter frame and the partition is changed, so that the adsorbent can always be spread flat in the chamber formed by the filter frame and the partition in a filling manner, and then adaptive adjustment can be made according to different exhaust gas treatment volumes, thereby improving the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the sectional purification tower for chemical tail gas containing fluoride of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the pressure plate, the fixing plate and the airbag combination of the present invention; Figure 3 It is a diagram showing the unfolding state of the pressure plate and the airbag of the present invention; Figure 4 is a cross-sectional view of the airbag of the present invention; Figure 5 A combined sectional view of the first electric slider and the second connecting ring of the present invention; Figure 6 For the present invention Figure 5 A magnified image of the area at A; Figure 7 It is a schematic diagram of the three-dimensional structure of the filter frame, partition plate and rotating frame combination of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the rotating ring, the pull ring and the pull rope combined from the first viewing angle of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the swivel, the pull ring and the pull rope combined from a second viewing angle of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the pull ring, the pull rope and the filter screen combination of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the partition and filter combination of the present invention.

[0016] Markings in the accompanying drawings: 1-purification barrel, 2-connecting cover, 3-inlet pipe, 4-outlet pipe, 5-filter frame, 5001-exhaust chamber, 6-partition, 7-filter, 101-pressing plate, 102-fixing plate, 103-airbag, 10301-first one-way membrane, 10302-second one-way membrane, 104-first connecting ring, 105-first electric slider, 106-second connecting ring, 107-second electric slider, 108-third connecting ring, 109-rotating frame, 10901-kneading part, 201-rotating ring, 202-pull ring, 203-pull rope, 204-filter. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Example 1 like Figure 1-Figure 7 As shown, a fluoride-containing chemical tail gas segmented purification tower includes a dry exhaust gas purification tower and a filter 7; the dry exhaust gas purification tower is composed of a purification barrel 1, a connecting cover 2, an air inlet pipe 3, an air outlet pipe 4 and a filter frame 5; the filter frame 5 is filled with an adsorbent; an exhaust cavity 5001 is formed between the filter frame 5 and the purification barrel 1, and the exhaust cavity 5001 is connected to the air outlet pipe 4; the air outlet pipe 4 is connected to an external exhaust device; the left side of the air inlet pipe 3 is connected to the filter 7; It also includes a partition 6, a pressure plate 101, a fixed plate 102, an airbag 103, a rotating component and an adjustment system; a plurality of partitions 6 are arranged in the filter frame 5; a rotating component is installed on the connecting cover 2; a plurality of pressure plates 101 are arranged on the rotating component, and each pressure plate 101 is attached to the outer side of the filter frame 5; a plurality of fixed plates 102 are fixedly connected to the filter frame 5; an airbag 103 is arranged between each adjacent pressure plate 101 and fixed plate 102; a plurality of first unidirectional membranes 10301 are arranged on each airbag 103, and each first unidirectional membrane 10301 is opened toward the inside of the airbag 103; a plurality of second unidirectional membranes 10302 are arranged on each airbag 103, and each second unidirectional membrane 10302 is opened toward the filter frame 5; an adjustment system is arranged on the connecting cover 2.

[0019] The rotating assembly includes a first connecting ring 104, a first electric slider 105, a second connecting ring 106, a second electric slider 107 and a third connecting ring 108; the two connecting covers 2 are fixedly connected to the opposite sides with a first connecting ring 104; each first connecting ring 104 is slidably connected to two first electric sliders 105; all the first electric sliders 105 located on the same first connecting ring 104 are fixedly connected to a second connecting ring 106; the two second connecting rings 106 are slidably connected to the opposite sides with two second electric sliders 107; the opposite sides of the two second connecting rings 106 are fixedly connected to the filter frame 5; all the second electric sliders 107 located on the same second connecting ring 106 are fixedly connected to a third connecting ring 108; the two third connecting rings 108 are fixedly connected to all the pressing plates 101.

[0020] It also includes a rotating frame 109; two third connecting rings 108 are fixedly connected to a rotating frame 109; a plurality of kneading parts 10901 are arranged on the rotating frame 109; the rotating frame 109 is fitted with the inner side of the filter frame 5.

[0021] A filter membrane is provided in each air bag 103 to absorb dust and prevent the dust from returning to the adsorbent, thereby extending the service life of the adsorbent.

[0022] The rotating frame 109 is entirely coated with an anti-adhesion coating to reduce the adhesion of dust generated by the adsorbent during operation, and to facilitate subsequent cleaning of the rotating frame 109 by workers.

[0023] The ends of the kneading portion 10901 on the rotating frame 109 are all configured to be arc-shaped to avoid damaging the adsorbent when spreading the adsorbent, thereby ensuring the integrity of the adsorbent.

[0024] When the fluoride waste gas is treated by the dry waste gas purification tower, the large particle impurities in the fluoride waste gas are pre-treated and intercepted by the filter 7, and then the treated waste gas is discharged into the air inlet pipe 3, so that the waste gas enters the purification barrel 1 from the air inlet pipe 3. It should be noted that: the filter frame 5 is pre-filled with an adsorbent. When the waste gas passes through the filter frame 5, the activated carbon adsorbent in the filter frame 5 is used to adsorb the fluoride waste gas, so that the waste gas passes through the exhaust chamber 5001 after treatment, and finally the purified gas is directly discharged from the outlet pipe 4, and then The purification of the waste gas is completed. At the same time, by arranging multiple partitions 6 in the filter frame 5, the partitions 6 divide the filter frame 5 into multiple storage areas, and the adsorbent stored in the filter frame 5 is separated. Compared with storing the adsorbent through the entire filter frame 5, the storage amount of activated carbon adsorbent in each storage area is small, so that the partition 6 and the adsorbent in the filter frame 5 will not cause excessive gaps due to gravity, avoiding excessive gaps or even voids in the upper part of the adsorbent in the filter frame 5 that affect the waste gas purification problem, and ensuring the device's ability to handle waste gas during operation.

[0025] It is also considered that after the purification barrel 1 is filled with waste gas, although the exhaust pipe 4 is evacuated through the external exhaust device to make the waste gas pass through various areas of the inner annular surface of the filter frame 5, most of the waste gas tends to drift upward to the upper part of the filter frame 5, so that the waste gas treatment capacity of the upper part of the filter frame 5 is greater than that of the lower part. This will cause excessive use of the adsorbent in the upper part of the filter frame 5, while the lower part of the filter frame 5 has less contact with the waste gas, resulting in uneven use of the adsorbent, and then the adsorbent in the upper part of the filter frame 5 is saturated prematurely and requires thermal regeneration. Thermal regeneration requires hot air to be introduced into the adsorbent in the filter frame 5. During the heating process, heat is transferred to the adsorbent, thereby increasing the temperature of the adsorbent surface and increasing the molecular kinetic energy of the adsorbed substance, thereby overcoming the adsorption force and desorbing from the adsorbent surface. Thermal regeneration of the adsorbent in the lower part of the filter frame 5 in an unsaturated state will shorten the service life of the adsorbent. This requires workers to perform thermal regeneration work on the area where the adsorbent is saturated separately, which is quite difficult. In order to avoid this phenomenon, based on the view from left to right, the first electric slider 105 on the first connecting ring 104 is started to rotate counterclockwise, thereby driving the second connecting ring 106, the second electric slider 107 and the third connecting ring 108 to rotate counterclockwise, so that the filter frame 5 rotates counterclockwise synchronously, so that the adsorbent on the filter frame 5 is in full contact with the exhaust gas when treating the exhaust gas, so that the adsorbent in each area of ​​the filter frame 5 is evenly used, and then the adsorbent usage is controlled to be consistent, so that subsequent workers can uniformly perform thermal regeneration work on all the adsorbents in the filter frame 5, reducing the difficulty of thermal regeneration of the adsorbent in the later stage.

[0026] In the process of purifying the exhaust gas, the second electric slider 107 is controlled to rotate clockwise for a certain distance, and then the second electric slider 107 drives the third connecting ring 108 and the pressing plate 101 to rotate clockwise for a certain distance, so that the distance between the adjacent pressing plates 101 and the fixing plates 102 is gradually increased. Figure 2 As shown in the transformation to Figure 3 The state shown in the figure causes the airbag 103 to be stretched, thereby opening the first unidirectional membrane 10301, and then the exhaust gas passing through the filter frame 5 is sucked into the airbag 103. Subsequently, the second electric slider 107 is controlled to rotate counterclockwise to reset the pressure plate 101 close to the fixed plate 102, thereby compressing the airbag 103. At this time, the second unidirectional membrane 10302 is opened, so that the exhaust gas is discharged to the filter frame 5. In this way, the exhaust gas is discharged back into the filter frame 5, and the exhaust gas is filtered for the second time by the adsorbent, thereby improving the exhaust gas treatment effect of the device. It should be noted that: when the airbag 103 is deployed, the pressure plate 101, the fixed plate 102 and the airbag 103 cooperate with each other to cover the outer annular surface of the filter frame 5, so that the exhaust gas stays briefly in the filter frame 5, which is beneficial to improving the exhaust gas treatment effect.

[0027] It is also considered that in the process of treating the exhaust gas, the dust remaining in the exhaust gas will adhere to the surface of the adsorbent, thereby causing the dust particles to adhere to the surface of the adsorbent and reduce the treatment effect of the exhaust gas. In order to avoid this phenomenon, when the exhaust gas is sucked by opening the first one-way membrane 10301, the first one-way membrane 10301 generates a suction force on the adsorbent in the filter frame 5, so that the dust adhering to the adsorbent is sucked into the airbag 103, and at the same time, the dust that falls off the adsorbent is also sucked into the airbag 103. When the gas in the airbag 103 is discharged from the second one-way membrane 10302, the airbag 103 is The gas first passes through the filter membrane in the airbag 103, and then intercepts the dust in the airbag 103, so that the gas ejected by the second unidirectional membrane 10302 is dust-free, and then the dust particles in the exhaust gas are collected, thereby improving the exhaust gas purification effect of the adsorbent during use. When the exhaust gas is treated in the above manner, the exhaust gas can be purified in multiple cycles without adding multiple layers of adsorbent. Under the premise of purifying the exhaust gas multiple times, the low utilization rate of the multi-layer adsorbent is avoided. At the same time, the inconvenience of subsequent disassembly of the existing multi-layer adsorbent layer can be avoided, thereby increasing the convenience of disassembly of subsequent devices.

[0028] It is also taken into consideration that when treating a large amount of waste gas, since the adsorbent is in a high-intensity working state at this time, this will cause the side that first contacts the waste gas to intercept and adsorb a large amount of dust, which will cause the gaps between the adsorbents to be blocked by dust, affecting the treatment of the waste gas. In order to avoid this phenomenon, based on the view from left to right, the second electric slider 107 is reciprocated clockwise and counterclockwise to make the third connecting ring 108 and the pressure plate 101 drive the airbag 103 to stretch and reset reciprocatingly to perform secondary filtration of the waste gas. During the process, the third connecting ring 108 and the rotating frame 109 are reciprocated clockwise and counterclockwise. It should be noted that: at this time, the first electric slider 105 is not working, which makes the rotating frame 109 The filter frame 5 is rotated clockwise and counterclockwise reciprocatingly, so that the kneading part 10901 is used to move the adsorbent in the filter frame 5, so that the adsorbents are rubbed and moved against each other, thereby avoiding the adsorbents from sticking to each other and clogging. At the same time, the adsorbent attached to the outer side of the filter frame 5 can be rubbed close to the inner side of the filter frame 5, thereby avoiding using only the adsorbent on the inner side of the filter frame 5 to purify the exhaust gas, preventing the adsorbent on the inner side from adsorbing a large amount of pollutants and causing airflow blockage, thereby improving the exhaust gas treatment capacity of the device during operation, and at the same time, the dust on the adsorbent can be rubbed off by kneading the adsorbent, and then the dust can be sucked away in cooperation with the airbag 103, further improving the cleaning effect of the adsorbent.

[0029] Example 2 On the basis of Example 1, Figure 8-Figure 11As shown, the adjustment system includes a pull ring 202, a pull rope 203 and a filter 204; a pull ring 202 is slidably connected to the air intake pipe 3; another pull ring 202 is slidably connected to the connecting cover 2 on the right side through a connecting rod; each pull ring 202 is fixedly connected to a plurality of pull ropes 203 distributed in a ring shape; a filter 204 is connected between each two adjacent partitions 6; the other end of the pull rope 203 passes through the partition 6 and is fixedly connected to the corresponding filter 204.

[0030] Each partition 6 is fixedly connected to the filter screen 204 via an elastic film to avoid a gap between the filter screen 204 and the partition 6, which would cause waste gas, dust and adsorbent to enter the partition 6 and be difficult to handle.

[0031] It also includes a swivel 201; each connection cover 2 is rotatably connected to a swivel 201; each pull rope 203 passes through the corresponding swivel 201 and is fixedly connected to the filter screen 204, and the pull rope 203 is slidably connected to the swivel 201.

[0032] Each filter screen 204 is configured to be in an arc shape, so as to fit the arc surface of the filter frame 5 , thereby ensuring that the adsorbent in the filter frame 5 is evenly filled.

[0033] In order to reduce the use of adsorbents when treating waste gas with different pollutant solubility, the thickness of the filled adsorbent is also different. When the waste gas pollution solubility is too large, the thickness of the adsorbent increases accordingly, and the waste gas can be treated by filling the filter frame 5. When the waste gas pollution solubility is small, the thickness of the adsorbent needs to be thinner. The chamber separated by the filter frame 5 and the partition 6 cannot spread the adsorbent inside the filter frame 5 well. Instead, the adsorbent cannot be filled and accumulates on one side of the chamber separated by the filter frame 5 and the partition 6, resulting in adsorbent gaps. In order to avoid this phenomenon, before purifying the waste gas, the worker simultaneously pulls the pull rings 202 on the left and right sides away from the connecting cover 2, such as Fig.10As shown, the pull rope 203 pulls the filter screen 204 to slide on the partition 6 toward the middle of the purification barrel 1, thereby compressing the spring and film between the filter screen 204 and the partition 6, thereby shortening the thickness of the chamber formed by the filter frame 5 and the partition 6. When the exhaust gas pollution solubility is small, the adsorbent is filled into the chamber formed by the filter frame 5 and the partition 6, and then the distance between the filter screen 204 and the filter frame 5 is adjusted to change the thickness of the chamber formed by the filter frame 5 and the partition 6, so that the adsorbent can always be spread flat on the chamber formed by the filter frame 5 and the partition 6 in a filling manner, and then when the exhaust gas pollution solubility is different, Adaptive adjustment is performed to improve the adaptability of the device. Furthermore, when the partition 6 rotates with the filter frame 5, in order to avoid the entanglement of the pull rope 203, a swivel 201 is set on the connecting cover 2, and then during the rotation of the partition 6, the pull rope 203 is divided into two sections by the swivel 201. A section of the pull rope 203 in the purification barrel 1 rotates with the partition 6 and then drives the swivel 201 to rotate, while a section of the pull rope 203 outside the purification barrel 1 synchronously drives the pull ring 202 to rotate under the rotation of the swivel 201, thereby avoiding the entanglement and knotting of the pull rope 203 during the rotation.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fluoride-containing chemical tail gas segmented purification tower, comprising a dry waste gas purification tower and a filter (7); the dry waste gas purification tower is composed of a purification barrel (1), a connecting cover (2), an air inlet pipe (3), an air outlet pipe (4) and a filter frame (5); the filter frame (5) is filled with an adsorbent; an exhaust cavity (5001) is formed between the filter frame (5) and the purification barrel (1), and the exhaust cavity (5001) is connected to the air outlet pipe (4); the air outlet pipe (4) is connected to an external exhaust device; the left side of the air inlet pipe (3) is connected to the filter (7); the characteristics are: The filter frame (5) also includes a partition (6), a pressure plate (101), a fixed plate (102), an air bag (103), a rotating assembly and an adjustment system; a plurality of partitions (6) are arranged in the filter frame (5) to prevent the adsorbent gap from being too large; a rotating assembly is installed on the connecting cover (2) to enable the adsorbent to uniformly adsorb the exhaust gas; a plurality of pressure plates (101) are arranged on the rotating assembly, and each pressure plate (101) is attached to the outside of the filter frame (5); a plurality of fixed plates (102) are fixedly connected to the filter frame (5); each adjacent pressure plate (101) and the fixed plate (102) are fixedly connected to the filter frame (5); An air bag (103) for improving the exhaust gas purification effect is arranged between the fixed plates (102); a plurality of first one-way membranes (10301) are arranged on each air bag (103), and each first one-way membrane (10301) is opened toward the inside of the air bag (103); a plurality of second one-way membranes (10302) are arranged on each air bag (103), and each second one-way membrane (10302) is opened toward the filter frame (5); and an adjustment system for adjusting and storing adsorbents of different thicknesses is arranged on the connection cover (2).

2. The sectional purification tower for chemical tail gas containing fluoride according to claim 1, characterized in that: The rotating assembly comprises a first connecting ring (104), a first electric slider (105), a second connecting ring (106), a second electric slider (107) and a third connecting ring (108); the two connecting covers (2) are each fixedly connected to a first connecting ring (104) on the opposite sides; each first connecting ring (104) is slidably connected to a plurality of first electric sliders (105); all first electric sliders (105) located on the same first connecting ring (104) are commonly fixedly connected to a second connecting ring (106) for enabling an adsorbent to uniformly adsorb exhaust gas; the two second connecting rings (106) are each slidably connected to the opposite sides thereof; the two second connecting rings (106) are fixedly connected to the filter frame (5) on the opposite sides thereof; all second electric sliders (107) located on the same second connecting ring (106) are commonly fixedly connected to a third connecting ring (108); and the two third connecting rings (108) are fixedly connected to all the pressing plates (101).

3. A sectional purification tower for chemical tail gas containing fluoride according to claim 2, characterized in that: It also includes a rotating frame (109); two third connecting rings (108) are fixedly connected to a rotating frame (109); a plurality of kneading parts (10901) for improving the use effect of the adsorbent are arranged on the rotating frame (109); and the rotating frame (109) is fitted to the inner side surface of the filter frame (5).

4. The sectional purification tower for chemical tail gas containing fluoride according to claim 1, characterized in that: A filter membrane is arranged in each air bag (103).

5. The sectional purification tower for chemical tail gas containing fluoride according to claim 3, characterized in that: The entire rotating frame (109) is coated with an anti-adhesion coating.

6. A sectional purification tower for chemical tail gas containing fluoride according to claim 5, characterized in that: The ends of the kneading portion (10901) on the rotating frame (109) are all configured to be arc-shaped.

7. The sectional purification tower for chemical tail gas containing fluoride according to claim 1, characterized in that: The adjustment system comprises a pull ring (202), a pull rope (203) and a filter screen (204); the pull ring (202) is slidably connected to the air inlet pipe (3); another pull ring (202) is slidably connected to the connection cover (2) on the right side via a connecting rod; each pull ring (202) is fixedly connected to a plurality of pull ropes (203); a filter screen (204) for adjusting and storing adsorbents of different thicknesses is connected between each two adjacent partitions (6); the other end of the pull rope (203) passes through the partition (6) and is fixedly connected to the corresponding filter screen (204).

8. A sectional purification tower for chemical tail gas containing fluoride according to claim 7, characterized in that: Each partition (6) is fixedly connected to the filter screen (204) via an elastic film.

9. The sectional purification tower for chemical tail gas containing fluoride according to claim 7, characterized in that: It also includes a rotating ring (201); each connection cover (2) is rotatably connected to a rotating ring (201) for preventing the pull rope (203) from being knotted; each pull rope (203) passes through the corresponding rotating ring (201) and is fixedly connected to the filter screen (204), and the pull rope (203) is slidably connected to the rotating ring (201).

10. A sectional purification tower for chemical tail gas containing fluoride according to claim 9, characterized in that: Each filter screen (204) is configured in an arc shape.

Images