CN115920616A - Flue gas desulfurization tower for recovering sulfur dioxide - Google Patents

Abstract

The application provides a flue gas desulfurization tower for recovering sulfur dioxide, which relates to the field of desulfurization towers, wherein a self-adaptive movable plate is arranged inside a tower body, a guide rod and a self-adaptive filter piece, the self-adaptive movable plate is in sliding connection with the guide rod along the vertical direction, the self-adaptive filter piece is arranged around the guide rod, the lower end of the self-adaptive filter piece is fixedly connected with the upper surface of the self-adaptive movable plate, the upper end of the self-adaptive filter piece is fixedly connected with the inner side wall of the tower body, a through hole is formed in the self-adaptive movable plate, the through hole is positioned on the outer side of a surrounding area of the lower end of the self-adaptive filter piece, and the self-adaptive filter piece has air permeability, water absorption and elasticity; the top fixedly connected with shower head in the tower body, the outside top fixedly connected with water tank of tower body, it has the second circulating water pump to concatenate between the export of water tank and the shower head, and the second circulating water pump is suitable for the water pump income shower head in the water tank, and the shower head is suitable for to spray water to self-adaptation and filters in the piece around the space and on the piece is filtered to the self-adaptation.

Description

Flue gas desulfurization tower for recovering sulfur dioxide

Technical Field

The application relates to the technical field of desulfurizing towers, in particular to a flue gas desulfurizing tower for recovering sulfur dioxide.

Background

The desulfurization tower is a tower type equipment for carrying out desulfurization treatment on industrial waste gas, and generally comprises a tower body, a water tank is arranged in the tower body, a circulating water pump is used for pumping an aqueous solution in the water tank to an air inlet, the waste gas is contacted with the aqueous solution when entering the tower body from the air inlet, and partial pollutant substances (such as sulfur dioxide gas) in the waste gas are adsorbed by water, however, the flow rate of the waste gas entering from the air inlet changes at different time, when the flow rate is large, the desulfurization rate (sulfur dioxide absorption rate) can be reduced, and the desulfurization rate of the desulfurization tower in the prior art cannot be adaptively adjusted according to the change of the flow rate of the inlet air.

Disclosure of Invention

The application provides a retrieve sulfur dioxide's flue gas desulfurization tower for solve among the prior art the desulfurization rate of desulfurizing tower can't make the technical problem of adaptability adjustment according to the change of inlet flow.

In an embodiment of the application, a flue gas desulfurization tower for recovering sulfur dioxide is provided, which comprises a tower body, wherein a waste gas inlet and a first circulating water pump are arranged at the bottom of the tower body, one end of the first circulating water pump extends into the waste gas inlet, the other end of the first circulating water pump extends into the bottom in the tower body, a waste gas outlet is formed in the top of the tower body, an adaptive movable plate, a guide rod and an adaptive filter element are arranged in the tower body, the guide rod is vertically arranged, the upper end of the guide rod is fixedly connected with the top of the tower body, the adaptive movable plate is connected with the guide rod in a sliding manner along the vertical direction, the adaptive movable plate is horizontally arranged, the adaptive filter element is arranged around the guide rod, the adaptive filter element is arranged above the adaptive movable plate, the lower end of the adaptive filter element is fixedly connected with the upper surface of the adaptive movable plate, the upper end of the adaptive filter element is fixedly connected with the inner side wall of the tower body, the adaptive filter element and the adaptive movable plate separate the inner space of the tower body into an upper space and a lower space, a through hole is arranged on the adaptive movable plate, the lower end of the adaptive filter element is arranged around the outer side of the adaptive filter element, and the adaptive filter element and has an elastic permeability; top fixedly connected with shower head in the tower body, the outer top fixedly connected with water tank of tower, the export of water tank with it has second circulating water pump to concatenate between the shower head, second circulating water pump is suitable for the water pump income in the water tank the shower head, the shower head is suitable for with the water shower extremely in the self-adaptation filter piece centers on the space and on the self-adaptation filter piece.

In some embodiments of the present application, the lower extreme fixedly connected with spacing ring of guide bar, the spacing ring is located the below of self-adaptation fly leaf, the self-adaptation fly leaf is followed after the guide bar lapse can with the spacing ring butt, the self-adaptation fly leaf relies on gravity pull down the self-adaptation filters the piece and makes the self-adaptation filter is in by the tensile state.

In some embodiments of this application embodiment, the cover is equipped with the counter weight ring on the guide bar, the counter weight ring with vertical direction sliding connection is followed to the guide bar, the counter weight ring is located self-adaptation fly leaf top, counter weight ring lower surface with the upper surface of self-adaptation fly leaf is along vertical direction butt, the counter weight ring relies on gravity to push down the self-adaptation fly leaf.

In some embodiments of this application embodiment, the inside wall fixedly connected with direction seal cover of tower body, the direction seal cover encircles the self-adaptation fly leaf sets up, the lateral surface of self-adaptation fly leaf with the medial surface of direction seal cover is along vertical direction sliding connection, the lateral surface of self-adaptation fly leaf with the medial surface of direction seal cover closely cooperates.

In some embodiments of the present application, the shape of the shower head is an annular shape, the shower head is disposed around the upper end of the guide rod, the lower surface of the shower head has spray holes distributed at equal intervals along the circumferential direction, the spray droplets sprayed from the spray holes are dispersed in the upper space in a conical shape, two opposite spray hole-sprayed mist droplet coverage spaces of the guide rod are overlapped in the upper space, the coverage area of the overlapping area is the same as the area of the upper end of the adaptive filter piece surrounding the area, and the coverage boundary of the overlapping area coincides with the boundary of the upper end of the adaptive filter piece surrounding the area.

In some embodiments of this application embodiment, tower body inner wall fixedly connected with shielding plate, the shielding plate level sets up, the center of shielding plate is equipped with the mouth that sprays, the guide bar is located the center of spraying the mouth, the shielding plate is located self-adaptation filters piece top, self-adaptation filter piece the upper end with the marginal fixed connection who sprays the mouth, self-adaptation filter piece the upper end pass through the shielding plate with tower body inner wall fixed connection, overlap regional coverage border with the mouth that sprays coincides around regional border.

In some embodiments of this application embodiment, tower body inner wall fixedly connected with annular accumulator, the annular accumulator encircles the axis setting of guide bar, the opening of annular accumulator sets up, the annular accumulator is located self-adaptation fly leaf below, the through-hole is located directly over the opening of annular accumulator.

In some embodiments of this application embodiment, tower body lateral wall fixedly connected with third circulating water pump, the entry of third circulating water pump with annular accumulator inner space intercommunication, the export of third circulating water pump with the access connection of water tank.

In some embodiments of this application embodiment, the infrared distance sensor of top fixedly connected with in the tower body, infrared distance sensor's detection direction is vertical down, infrared distance sensor is located the inboard around the region is filtered to the self-adaptation, infrared distance sensor is suitable for the detection the self-adaptation fly leaf with vertical distance between the infrared distance sensor, fixedly connected with controller on the outside lateral wall of water tank, second circulating water pump infrared distance sensor respectively with the controller is connected, the controller is suitable for the basis the self-adaptation fly leaf with vertical distance control between the infrared distance sensor the second circulating water pump work.

In some implementations of embodiments of the present application, the adaptive filter surface has a dense distribution of mesh;

or the surface of the adaptive filter piece is provided with densely distributed grids which are vertically arranged.

The application has the following beneficial effects:

during the working process, waste gas enters the interior of the tower body from the waste gas inlet, the first circulating water pump sprays water at the bottom of the tower body into the waste gas inlet to perform primary absorption with the waste gas, particulate matters and partial gas in the waste gas are absorbed, and the water sprayed into the waste gas outlet flows back to the bottom of the tower body from the waste gas inlet again; after waste gas enters the lower space, certain air pressure is generated in the lower space to push the self-adaptive movable plate to move upwards, when the air pressure in the lower space is not changed, the upper position and the lower position of the self-adaptive movable plate are balanced, the waste gas enters the upper space through the through hole and the self-adaptive filter piece in sequence, water in the water tank is sprayed into the second space through the spray head by the second circulating water pump and is scattered onto the self-adaptive filter piece to absorb the waste gas entering the upper space, and the waste gas is adsorbed by the self-adaptive filter piece when passing through the self-adaptive filter piece due to the fact that the self-adaptive filter piece adsorbs spray water; when the flow of the waste gas at the waste gas inlet is increased, the air pressure in the lower space is increased, the self-adaptive movable plate is pushed to move upwards, the self-adaptive filter element is contracted, the air-permeable passage on the surface of the self-adaptive filter element is reduced, the length of the passage is increased, the resistance to the waste gas is increased, and the length of the path of the waste gas flowing through the air-permeable passage is increased, so that the reduction of the filtering degree of the waste gas caused by the increase of the flow of the waste gas is avoided, the desulfurization rate is improved or the reduction of the desulfurization rate is avoided; when the waste gas flow of waste gas import reduced, the atmospheric pressure in lower part space reduced, and self-adaptation fly leaf downstream, and self-adaptation filter is stretched, and the ventilative passageway on self-adaptation filter surface increases and length reduces, and under the unchangeable circumstances of the rate of desulfurization of keeping, provides desulfurization work efficiency, realizes making adaptability adjustment desulfurization rate according to the change of inlet flow.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a flue gas desulfurization tower for recovering sulfur dioxide in an embodiment of the present application;

FIG. 2 is a schematic drawing showing a comparison between before and after stretching of an expanded view of an adaptive filter according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram showing a comparison between before and after stretching of an expanded view of another adaptive filter according to an embodiment of the present application.

Reference numerals:

101. a tower body; 102. an exhaust gas inlet; 103. a first circulating water pump; 104. an exhaust gas outlet; 105. a self-adaptive movable plate; 106. a guide bar; 107. an adaptive filter element; 108. an upper space; 109. a lower space; 110. a through hole; 111. a shower head; 112. a second circulating water pump; 113. a limiting ring; 114. a counterweight ring; 115. a guide sealing sleeve; 116. a shielding plate; 117. a spray port; 118. an annular recovery tank; 119. a third circulating water pump; 120. an infrared distance sensor; 121. and a controller.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the figures and examples, and the terminology used in the description of the embodiments of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.

As shown in fig. 1, in the embodiment of the present application, there is provided a flue gas desulfurization tower for recovering sulfur dioxide, comprising a tower body 101, wherein a waste gas inlet 102 and a first circulating water pump 103 are disposed at the bottom of the tower body 101, one end of the first circulating water pump 103 extends into the waste gas inlet 102, the other end of the first circulating water pump 103 extends into the bottom of the tower body 101, a waste gas outlet 104 is disposed at the top of the tower body 101, an adaptive movable plate 105, a guide rod 106, and an adaptive filter member 107 are disposed inside the tower body 101, the guide rod 106 is vertically disposed, the upper end of the guide rod 106 is fixedly connected to the top of the tower body 101, the adaptive movable plate 105 is slidably connected to the guide rod 106, the adaptive movable plate 105 is horizontally disposed, the adaptive filter member 107 is disposed around the guide rod 106, the adaptive filter member 107 is disposed above the adaptive movable plate 105, the lower end of the adaptive filter member 107 is fixedly connected to the upper surface of the adaptive movable plate 105, the upper end of the adaptive movable plate 107 is fixedly connected to the inner side wall of the tower body 101, the adaptive movable plate 107 is separated into an upper space and a lower space of the adaptive filter member 107, the adaptive movable plate 105 is disposed outside the adaptive filter member 107, the adaptive movable plate 105, and the adaptive filter member 107, the adaptive filter member 105 is disposed outside the adaptive movable plate 105, the adaptive filter member 110, the adaptive movable plate 105, the adaptive filter member 110 is disposed outside the adaptive filter member 110, and the adaptive filter member 110, the adaptive movable plate 105, the adaptive filter member 110 is disposed outside the adaptive movable plate 101, and the adaptive filter member 110, the adaptive movable plate 110, the adaptive filter member 105, and the adaptive filter member 110 is disposed outside the adaptive filter member 110, the adaptive filter member 107, the adaptive filter member 110, the adaptive movable plate 109, the adaptive filter member 110 is disposed outside the adaptive filter member 101; top fixedly connected with shower head 111 in the tower body 101, the outer top fixedly connected with water tank of tower body 101, the export of water tank with it has second circulating water pump 112 to concatenate between the shower head 111, second circulating water pump 112 is suitable for the water pump in the water tank to go into shower head 111, shower head 111 is suitable for with the water shower to in the self-adaptation filters piece 107 around the space and on the self-adaptation filters piece 107.

Through the above embodiment of this embodiment, during operation, the exhaust gas enters the interior of the tower body 101 from the exhaust gas inlet 102, the first circulating water pump 103 sprays water at the bottom of the tower body 101 into the exhaust gas inlet 102 to perform first absorption with the exhaust gas, so as to absorb particulate matters and part of gas in the exhaust gas, and the water sprayed into the exhaust gas outlet flows back to the bottom of the tower body 101 from the exhaust gas inlet 102; after the exhaust gas enters the lower space 109, the lower space 109 generates a certain air pressure to push the adaptive movable plate 105 to move upwards, when the air pressure of the lower space 109 is not changed, the upper position and the lower position of the adaptive movable plate 105 are balanced, the exhaust gas enters the upper space 108 through the through hole 110 and the adaptive filter element 107 in sequence, the water in the water tank is sprayed into the second space through the spray header 111 by the second circulating water pump 112 and is sprayed on the adaptive filter element 107 to absorb the exhaust gas entering the upper space 108, the adaptive filter element 107 has adsorbability due to adsorption of spray water, and the exhaust gas is adsorbed by the adaptive filter element 107 when passing through the adaptive filter element 107; when the flow rate of the exhaust gas at the exhaust gas inlet 102 is increased, the air pressure in the lower space 109 is increased, the adaptive movable plate 105 is pushed to move upwards, the adaptive filter element 107 is contracted, the air-permeable passage on the surface of the adaptive filter element 107 is reduced, the length of the passage is increased, the resistance to the exhaust gas is increased, the length of the path through which the exhaust gas flows through the air-permeable passage is increased (the thickness is increased, and therefore, the length of the air-permeable passage is increased), which is beneficial to avoiding the reduction of the filtration degree of the exhaust gas caused by the increase of the flow rate of the exhaust gas, improving the desulfurization rate or avoiding the reduction of the desulfurization rate; when the flow rate of the exhaust gas at the exhaust gas inlet 102 is reduced, the air pressure in the lower space 109 is reduced, the adaptive movable plate 105 moves downwards, the adaptive filter element 107 is stretched, the air passage on the surface of the adaptive filter element 107 is increased, the length of the air passage is reduced, the desulfurization working efficiency is improved under the condition that the desulfurization rate is kept unchanged, and the desulfurization rate is adaptively adjusted according to the change of the flow rate of the inlet air.

In some embodiments of this embodiment, a limiting ring 113 is fixedly connected to the lower end of the guide rod 106, the limiting ring 113 is located below the adaptive movable plate 105, the adaptive movable plate 105 can abut against the limiting ring 113 after sliding down along the guide rod 106, and the adaptive movable plate 105 pulls down the adaptive filter 107 by gravity to place the adaptive filter 107 in a stretched state.

With the above embodiment of the present embodiment, when no exhaust gas is introduced, the pressure in the upper space 108 is the same as the pressure in the lower space 109, and it is preferable that the adaptive moving plate 105 is just in contact with the limiting ring 113, and no compression occurs between the adaptive moving plate 105 and the limiting ring 113; after the exhaust gas is introduced, the adaptive movable plate 105 can be lifted and lowered adaptively according to the flow rate of the exhaust gas, and the limiting ring 113 helps to prevent the adaptive movable plate 105 from slipping off the guide rod 106 downward due to inertia when the pressure in the lower space 109 suddenly drops.

In some embodiments of this embodiment, the guide rod 106 is sleeved with a counterweight ring 114, the counterweight ring 114 is slidably connected to the guide rod 106 along a vertical direction, the counterweight ring 114 is located above the adaptive movable plate 105, a lower surface of the counterweight ring 114 is abutted to an upper surface of the adaptive movable plate 105 along the vertical direction, and the counterweight ring 114 presses down the adaptive movable plate 105 by gravity.

With the above embodiment of the present embodiment, during the installation process, the weight of the adaptive movable plate 105 causes the adaptive filter 107 to stretch downward, a certain distance exists between the adaptive movable plate 105 and the limiting ring 113, and the weight ring 114 increases the pulling force of the adaptive movable plate 105 on the adaptive filter 107, so that the adaptive movable plate just contacts the limiting ring 113; through reducing the weight of counter weight ring 114, can adjust the self-adaptation performance of self-adaptation movable plate 105, for example after reducing the weight of counter weight ring 114, change the distance between self-adaptation movable plate 105 and spacing ring 113, when making self-adaptation movable plate 105 move downwards, can rely on inertia to move down a section distance, avoid every downstream all to collide with spacing ring 113, through adjusting the counter weight, can also adjust the dynamics that self-adaptation movable plate 105 and spacing ring 113 collided.

In some embodiments of this embodiment, a guide sealing sleeve 115 is fixedly connected to an inner side wall of the tower body 101, the guide sealing sleeve 115 is disposed around the adaptive moving plate 105, an outer side surface of the adaptive moving plate 105 is slidably connected to an inner side surface of the guide sealing sleeve 115 in a vertical direction, and an outer side surface of the adaptive moving plate 105 is tightly fitted to an inner side surface of the guide sealing sleeve 115.

With the above-described embodiment of the present embodiment, the guiding sealing sleeve 115 guides the adaptive movable plate 105 in the vertical direction while sealing the edge of the adaptive movable plate 105, so as to improve the stability of the up-and-down movement of the adaptive movable plate 105 and the sensitivity of the up-and-down movement according to the change of the lower air pressure.

In some embodiments of the present embodiment, the shower head 111 is in a ring shape, the shower head 111 is disposed around the upper end of the guiding rod 106, the spraying holes are distributed on the lower surface of the shower head 111 at equal intervals along the circumferential direction, the mist sprayed from each spraying hole diverges conically in the upper space 108, the covering spaces of the mist sprayed from two opposite spraying holes on both sides of the guiding rod 106 overlap in the upper space 108, the covering area of the overlapping area is the same as the area of the surrounding area of the upper end of the adaptive filter 107, and the covering boundary of the overlapping area coincides with the boundary of the surrounding area of the upper end of the adaptive filter 107.

In the above embodiment of the present embodiment, when the exhaust gas passes through the adaptive filter 107, the exhaust gas is adsorbed by the water in the adaptive filter 107, enters the region surrounded by the adaptive filter 107, is adsorbed by the dense mist droplets (mist droplets in the overlapping region), passes through the dense mist droplets, is adsorbed by the sparse mist droplets (mist droplets outside the overlapping region), and is finally discharged from the exhaust gas outlet 104.

In some embodiments of this embodiment, a shielding plate 116 is fixedly connected to an inner wall of the tower body 101, the shielding plate 116 is horizontally disposed, a spraying opening 117 is disposed in a center of the shielding plate 116, the guide rod 106 is located in a center of the spraying opening 117, the shielding plate 116 is located above the adaptive filter element 107, an upper end of the adaptive filter element 107 is fixedly connected to an edge of the spraying opening 117, an upper end of the adaptive filter element 107 is fixedly connected to the inner wall of the tower body 101 through the shielding plate 116, and a covering boundary of the overlapping region coincides with a boundary of a region surrounded by the spraying opening 117.

In some embodiments of the present embodiment, an annular recycling groove 118 is fixedly connected to an inner wall of the tower body 101, the annular recycling groove 118 is disposed around a central axis of the guide rod 106, an opening of the annular recycling groove 118 is disposed upward, the annular recycling groove 118 is located below the adaptive moving plate 105, and the through hole 110 is located directly above the opening of the annular recycling groove 118.

Through the above-mentioned embodiment of the present embodiment, the water flowing onto the adaptive movable plate 105 drops from the through holes 110 into the annular recycling groove 118, so as to recycle the sprayed water.

In some embodiments of this embodiment, a third circulating water pump 119 is fixedly connected to an outer side wall of the tower body 101, an inlet of the third circulating water pump 119 is communicated with the inner space of the annular recovery tank 118, and an outlet of the third circulating water pump 119 is connected to an inlet of the water tank.

With the above embodiment of the present embodiment, the third circulating water pump 119 pumps the water collected in the annular recovering tank 118 back into the water tank to facilitate the circulating spraying, and it should be understood that the water in the water tank needs to be replaced wholly or partially at regular intervals because the water in the water tank is recycled to increase the concentration of impurities and solutes in the water.

In some embodiments of the present embodiment, an infrared distance sensor 120 is fixedly connected to the top of the tower body 101, a detection direction of the infrared distance sensor 120 faces vertically downward, the infrared distance sensor 120 is located inside a region surrounded by the adaptive filter 107, the infrared distance sensor 120 is adapted to detect a vertical distance between the adaptive movable plate 105 and the infrared distance sensor 120, a controller 121 is fixedly connected to a side wall outside the water tank, the second circulating water pump 112 and the infrared distance sensor 120 are respectively connected to the controller 121, and the controller 121 is adapted to control the second circulating water pump 112 to operate according to the vertical distance between the adaptive movable plate 105 and the infrared distance sensor 120.

With the above embodiment of the present embodiment, after the adaptive movable plate 105 moves up and down, the flow rate of the exhaust gas passing through the adaptive filter 107 changes, and when the flow rate increases (the corresponding adaptive movable plate 105 moves up), the controller 121 controls the second circulating water pump 112 to increase the working power, increase the spray density and spray speed, and help to improve the desulfurization rate of the exhaust gas with high flow rate.

In some embodiments of this embodiment, as shown in fig. 2, the adaptive filter 107 has a dense distribution of mesh on its surface;

alternatively, as shown in fig. 3, the adaptive filter 107 may have a dense grid on its surface, the grid being vertically disposed.

Preferably, the adaptive filter member 107 is made of cotton thread wrapped around an elastic core thread, the cotton thread on the surface has good water absorption, and the elastic core thread makes the entire adaptive filter member 107 have good elasticity.

With the above-described embodiment of the present embodiment, the vertical arrangement of the grid helps the water flow down the surface of the adaptive filter element 107, reducing the residence time of the water on the adaptive filter element 107 (increasing the refresh rate of the water on the adaptive filter element 107).

The water in this example is a solution to which sodium hydroxide is added.

The above examples are only illustrative and not restrictive, and those skilled in the art can modify the embodiments of the present application as required after reading the present specification without any inventive contribution, but all of them are protected by patent laws within the scope of the claims of the present application.

Claims (10)

1. A flue gas desulfurization tower for recovering sulfur dioxide comprises a tower body, wherein a waste gas inlet and a first circulating water pump are arranged at the bottom of the tower body, one end of the first circulating water pump extends into the waste gas inlet, the other end of the first circulating water pump extends into the bottom in the tower body, and a waste gas outlet is arranged at the top of the tower body; top fixedly connected with shower head in the tower body, the outer top fixedly connected with water tank of tower, the export of water tank with it has second circulating water pump to concatenate between the shower head, second circulating water pump is suitable for the water pump income in the water tank the shower head, the shower head is suitable for with the water shower extremely in the self-adaptation filter piece centers on the space and on the self-adaptation filter piece.

2. The flue gas desulfurization tower for recovering sulfur dioxide as recited in claim 1, wherein a limiting ring is fixedly connected to a lower end of the guide rod, the limiting ring is located below the adaptive movable plate, the adaptive movable plate can abut against the limiting ring after sliding downwards along the guide rod, and the adaptive movable plate pulls down the adaptive filter member by gravity to enable the adaptive filter member to be in a stretched state.

3. The flue gas desulfurization tower for recovering sulfur dioxide as recited in claim 1, wherein a counterweight ring is sleeved on the guide rod, the counterweight ring is slidably connected with the guide rod along a vertical direction, the counterweight ring is located above the adaptive movable plate, a lower surface of the counterweight ring is abutted against an upper surface of the adaptive movable plate along the vertical direction, and the counterweight ring presses down the adaptive movable plate by means of gravity.

4. The flue gas desulfurization tower for recovering sulfur dioxide as recited in claim 1, wherein a guiding sealing sleeve is fixedly connected to the inner side wall of the tower body, the guiding sealing sleeve surrounds the adaptive movable plate, the outer side surface of the adaptive movable plate is in sliding connection with the inner side surface of the guiding sealing sleeve along the vertical direction, and the outer side surface of the adaptive movable plate is tightly matched with the inner side surface of the guiding sealing sleeve.

5. The flue gas desulfurization tower for recovering sulfur dioxide as recited in claim 1, wherein said spray header is shaped as a ring, said spray header is disposed around an upper end of said guide rod, spray holes are distributed on a lower surface of said spray header at equal intervals along a circumferential direction, mist drops sprayed from each of said spray holes are diverged in a conical shape in said upper space, mist drop coverage spaces sprayed from two opposite spray holes located on both sides of said guide rod are overlapped in said upper space, a coverage area of an overlapped area is the same as an area of a surrounding area of an upper end of said adaptive filter member, and a coverage boundary of the overlapped area coincides with a boundary of the surrounding area of the upper end of said adaptive filter member.

6. The flue gas desulfurization tower for recovering sulfur dioxide as recited in claim 5, wherein a shielding plate is fixedly connected to the inner wall of the tower body, the shielding plate is horizontally disposed, a spray opening is disposed at the center of the shielding plate, the guide rod is disposed at the center of the spray opening, the shielding plate is disposed above the adaptive filter member, the upper end of the adaptive filter member is fixedly connected to the edge of the spray opening, the upper end of the adaptive filter member is fixedly connected to the inner wall of the tower body through the shielding plate, and the covering boundary of the overlapping area coincides with the boundary of the surrounding area of the spray opening.

7. The flue gas desulfurization tower for recovering sulfur dioxide as recited in claim 1, wherein an annular recovery groove is fixedly connected to the inner wall of the tower body, the annular recovery groove is disposed around the central axis of the guide rod, the opening of the annular recovery groove is disposed upward, the annular recovery groove is disposed below the adaptive movable plate, and the through hole is disposed directly above the opening of the annular recovery groove.

8. The flue gas desulfurization tower for recovering sulfur dioxide as recited in claim 7, wherein a third circulating water pump is fixedly connected to an outer side wall of the tower body, an inlet of the third circulating water pump is communicated with an inner space of the annular recovery tank, and an outlet of the third circulating water pump is connected with an inlet of the water tank.

9. The flue gas desulfurization tower for recovering sulfur dioxide as recited in claim 1, wherein an infrared distance sensor is fixedly connected to the top of the tower body, the detection direction of the infrared distance sensor is vertically downward, the infrared distance sensor is located inside the surrounding area of the adaptive filter element, the infrared distance sensor is adapted to detect the vertical distance between the adaptive movable plate and the infrared distance sensor, a controller is fixedly connected to the side wall outside the water tank, the second circulating water pump and the infrared distance sensor are respectively connected to the controller, and the controller is adapted to control the second circulating water pump to operate according to the vertical distance between the adaptive movable plate and the infrared distance sensor.

10. The flue gas desulfurization tower for recovering sulfur dioxide according to claim 1, wherein the adaptive filter element has a dense distribution of meshes on its surface;

or the surface of the adaptive filter piece is provided with densely distributed grids which are vertically arranged.

Images