Catalytic flue gas desulfurization and denitrification sewage treatment device

Abstract

The invention relates to the technical field of sewage treatment, in particular to a catalytic flue gas desulfurization and denitrification sewage treatment device which comprises a reaction tank, and an impurity collecting mechanism capable of moving up and down is arranged on the inner side of the reaction tank; and the impurity collecting mechanism comprises a separating cylinder and a lower shell, a second motor is installed at the lower end of the outer side of the lower shell, a rotating shaft extending into the separating cylinder and the lower shell is fixed to the driving end of the second motor, and a plurality of collecting grooves are formed in the side wall of the separating cylinder. Sewage, close to the side wall, in the reaction tank is sucked into the inner side of a separation barrel of the impurity collection mechanism through the liquid suction mechanism, meanwhile, the impurity separation mechanism conducts centrifugal separation on the sewage in the separation barrel, and floccules in the sewage are thrown into filtering holes of a plurality of arc-shaped filtering nets; and the sewage flows back to the reaction tank again through a plurality of backflow holes in the upper end of the separation cylinder, so that the sewage in the reaction tank can be quickly separated from floc suspended in the reaction tank, and the sewage treatment efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a sewage treatment device for catalytic flue gas desulfurization and denitrification. Background Art

[0002] Flue gas desulfurization and denitrification technology is a boiler flue gas purification technology used in the chemical industry that produces a lot of nitrogen oxides and sulfur oxides. It absorbs nitrogen and sulfur elements in the flue gas through chemical reactions. Flue gas desulfurization and denitrification waste liquid has the characteristics of high turbidity, large suspended matter content, and low particle viscosity. In the treatment process, neutralization, precipitation, flocculation and clarification processes are often used.

[0003] After searching, the Chinese patent with publication number: CN221166215U discloses a petrochemical flue gas desulfurization and denitrification wastewater treatment device, in which a waste barrel is connected to a sedimentation barrel, a waste discharge pipe is arranged below the sedimentation barrel, and the waste discharge pipe is arranged at an angle, a feed joint is fixedly arranged on the waste discharge pipe, a connecting elbow is fixedly arranged on the lower end of the sedimentation barrel, a connecting elbow is flange-connected to the feed joint, a discharge joint is fixedly arranged on the upper end of the waste discharge pipe, and a connecting joint is fixedly arranged on the lower end of the waste discharge pipe.

[0004] Based on the above search and combined with actual problems, it is found that the existing sewage treatment equipment usually separates the suspended matter in the sewage by gravity sedimentation. However, the density difference between some suspended matter and sewage is very small, so it takes a long time for the suspended matter to completely settle, which affects the sewage treatment efficiency. In order to improve the treatment efficiency, some companies use a treatment process to filter the suspended matter in the sewage through a filter. However, when treating large quantities of sewage, the filter will quickly be blocked by the suspended matter, thus affecting the normal filtering effect. Summary of the invention

[0005] The object of the present invention is to provide a catalytic flue gas desulfurization and denitrification wastewater treatment device to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a catalytic flue gas desulfurization and denitrification wastewater treatment device, including a reaction tank, an inner side of the reaction tank is provided with an impurity collecting mechanism that can move up and down; the impurity collecting mechanism includes a separation cylinder and a lower shell, a second motor is installed at the lower end of the outer side of the lower shell, and a driving end of the second motor is fixed with a rotating shaft extending to the inside of the separation cylinder and the lower shell, a side wall of the separation cylinder is provided with a plurality of collecting grooves, a plurality of push plates located on the inner side of the separation cylinder are fixed on the outer side of the rotating shaft, the inner side of each of the collecting grooves is rotatably connected with a rotating tube, and the outer side of each of the rotating tubes is fixed with a rotating cylinder through two outer partitions, and the outer partition divides the inner side of the rotating cylinder into two filter chambers, and two arc-shaped filter screens are symmetrically arranged on both sides of each of the rotating cylinders, a driving mechanism and a recoil cleaning mechanism are arranged between the plurality of rotating tubes, a liquid suction mechanism is arranged on the outer side of the lower shell, and a plurality of reflux holes are opened at the upper end of the outer side of the separation cylinder.

[0007] Preferably, the driving mechanism includes an upper shell fixed to the upper end of the separation cylinder and a driven gear fixed to the upper end of the outer side of each rotating tube and located on the inner side of the upper shell. A first motor is installed on the inner side of the upper shell, and a driving gear is fixed to the driving end of the first motor. The driving gear is meshed with each driven gear through teeth.

[0008] Preferably, the liquid pipetting mechanism includes a plurality of liquid pipetting tubes inserted on the outside of the lower shell, a driving bevel gear fixed on the outside of the rotating shaft and located on the inside of the lower shell, the inner end of each of the liquid pipetting tubes is isolated from the inner side of the lower shell by a sealing plate, and the inner side of each of the liquid pipetting tubes is rotatably connected to a conveying screw passing through the sealing plate, one end of each of the conveying screws is fixed with a driven bevel gear meshing with the driving bevel gear, and the end of each of the liquid pipetting tubes close to the lower shell is connected to the inner side of the separation cylinder through a transfer pipe.

[0009] Preferably, a baffle is detachably provided on one side of each collecting tank, a plurality of through holes are evenly provided on the surface of each baffle, and a plurality of wrapped rubber strips are evenly provided on the surface of each baffle located on the inner side of the collecting tank.

[0010] Preferably, a reflux pipe is inserted at the position of each reflux hole on the outer side of the separation cylinder, and a plurality of reflux branches are horizontally inserted on one side of each reflux pipe.

[0011] Preferably, the recoil cleaning mechanism includes an air pump installed on the inner side of the upper shell, a fixed sleeve fixed on the inner side of the upper shell at a position corresponding to each rotating tube, an inner partition fixed on the inner side of each rotating tube, and a plurality of air jets opened on both sides of each rotating tube and located on the inner side of the arc filter. The air outlet end of the air pump is connected to a diversion shell, and a connecting pipe is inserted into the outer side of each of the fixed sleeves, and one end of each connecting pipe is connected to the inner side of the diversion shell through an air supply pipe. Two air inlets that can be connected to the connecting pipe are opened at two side positions at one end of the rotating tube, and the inner partition divides the inner side of the rotating tube into two air cavities respectively connected to the two filter cavities, and the two air inlets are respectively connected to the two air cavities, and the plurality of air jets located on both sides are respectively connected to the two filter cavities.

[0012] Preferably, the plurality of air jets are all in a conical structure.

[0013] Preferably, the plurality of connecting pipes are arranged on the fixed sleeve at a position on one side of the collecting tank close to a corresponding position.

[0014] Preferably, the air inlet end of the air pump is connected to an extended air inlet pipe extending to the outside of the reaction tank.

[0015] Preferably, two lifting electric cylinders are installed on the outer side of the reaction tank, and lifting rods are fixed to the telescopic ends of the two lifting electric cylinders. The lower side of the lifting rod is fixedly connected to the upper shell of the driving mechanism through a suspension rod.

[0016] The present invention provides a catalytic flue gas desulfurization and denitrification sewage treatment device through improvement, which has the following improvements and advantages compared with the prior art: First, the present invention uses a liquid suction mechanism to suck sewage near the side wall of the reaction tank into the inner side of the separation cylinder of the impurity collection mechanism. At the same time, the impurity separation mechanism centrifugally separates the sewage in the separation cylinder, and throws the flocs in the sewage into the filter holes of multiple arc-shaped filter screens. The sewage flows back into the reaction tank through multiple reflux holes located at the upper end of the separation cylinder, so that the sewage in the reaction tank and the flocs suspended therein can be quickly separated, thereby greatly improving the sewage treatment efficiency.

[0017] Secondly, the present invention can perform backwash cleaning on each arc filter in turn through the backwash cleaning mechanism, and blow out a high-speed airflow from the other side of the arc filter, so that the flocs stuck in the filter holes of the arc filter fall off, and the fallen flocs can be retained in the corresponding collection tank, which can prevent the flocs from being mixed into the sewage again. At the same time, it ensures that the filter holes of the arc filter maintain sufficient space to continuously collect flocs in the sewage, further improving the separation and collection efficiency of the flocs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure inside the reaction tank of the present invention; Figure 3 It is a cross-sectional structural schematic diagram of the impurity separation mechanism and the liquid absorption mechanism in the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 It is a schematic diagram of the disassembled structure of the impurity separation mechanism in the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at B in the middle; Figure 7 It is a schematic diagram of the disassembled structure of the rotating tube and the rotating cylinder in the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at C in the middle; Fig. 9 It is a schematic diagram of the disassembled structure of the baffle in the present invention.

[0020] Reference numerals: 1. Reaction tank; 2. Lifting electric cylinder; 3. Hanging rod; 4. Lifting rod; 101. Separation cylinder; 102. Lower shell; 103. Rotating shaft; 104. Push plate; 105. Collecting tank; 106. Rotating tube; 107. Rotating cylinder; 108. Arc filter; 109. Driven gear; 110. First motor; 111. Driving gear; 112. Outer partition; 113. Upper shell; 114. Baffle; 115. Through hole; 116. Wrapping rubber strip; 117. Reflux pipe; 118, reflux branch pipe; 119, second motor; 120, reflux hole; 201, jet nozzle; 202, inner partition; 203, air inlet; 204, fixed sleeve; 205, connecting pipe; 206, air pipe; 207, air pump; 208, diversion shell; 209, extended air inlet pipe; 301, liquid suction pipe; 302, sealing plate; 303, conveying screw; 304, driven bevel gear; 305, driving bevel gear; 306, transfer pipe. DETAILED DESCRIPTION

[0021] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The present invention provides a catalytic flue gas desulfurization and denitrification sewage treatment device through improvement. The technical solution of the present invention is: like Figures 1 to 9 As shown, an embodiment of the present invention provides a catalytic flue gas desulfurization and denitrification wastewater treatment device, including a reaction tank 1, an impurity collecting mechanism that can move up and down is arranged on the inner side of the reaction tank 1; the impurity collecting mechanism includes a separation cylinder 101 and a lower shell 102, a second motor 119 is installed on the lower end of the outer side of the lower shell 102, a rotating shaft 103 extending to the inside of the separation cylinder 101 and the lower shell 102 is fixed to the driving end of the second motor 119, a plurality of collecting grooves 105 are arranged on the side wall of the separation cylinder 101, a plurality of push plates 104 located on the inner side of the separation cylinder 101 are fixed to the outer side of the rotating shaft 103, a rotating tube 106 is rotatably connected to the inner side of each collecting groove 105, and a rotating cylinder 107 (such as a rotating tube 106) is fixed to the outer side of each rotating tube 106 through two outer partitions 112. Figure 8 As shown in the figure, the outer partition 112 divides the inner side of the rotating cylinder 107 into two filter chambers, two arc-shaped filter screens 108 are symmetrically arranged on both sides of each rotating cylinder 107, a driving mechanism and a backwash cleaning mechanism are arranged between the multiple rotating tubes 106, a liquid suction mechanism is arranged on the outer side of the lower shell 102, and a plurality of reflux holes 120 are opened at the upper end of the outer side of the separation cylinder 101.

[0023] Further, the driving mechanism includes an upper shell 113 fixed to the upper end of the separation cylinder 101 and a driven gear 109 fixed to the upper end of the outer side of each rotating tube 106 and located inside the upper shell 113. A first motor 110 is installed inside the upper shell 113. A driving gear 111 is fixed to the driving end of the first motor 110. The driving gear 111 is meshed with each driven gear 109 through teeth. The operation of the first motor 110 of the driving mechanism drives the driving gear 111 to rotate slowly, and the driving gear 111 drives multiple driven gears 109 to rotate synchronously through tooth meshing, and the multiple driven gears 109 respectively drive multiple slowly rotating tubes 106 to rotate synchronously, and the multiple rotating tubes 106 respectively drive multiple arc-shaped filter screens 108 to rotate accordingly. When the filter holes of the arc-shaped filter screen 108 located on the inner side of the separation cylinder 101 are filled with flocs, it can rotate to the inner side of the collecting tank 105 with the rotating cylinder 107, and the arc-shaped filter screen 108 on the opposite side rotates from the inner side of the collecting tank 105 to the inner side of the separation cylinder 101 to continuously collect the flocs.

[0024] Furthermore, the liquid suction mechanism includes a plurality of liquid suction tubes 301 inserted on the outside of the lower shell 102, and a driving bevel gear 305 fixed on the outside of the rotating shaft 103 and located on the inside of the lower shell 102. The inner end of each liquid suction tube 301 is isolated from the inner side of the lower shell 102 by a sealing plate 302, and the inner side of each liquid suction tube 301 is rotatably connected with a conveying screw 303 penetrating through the sealing plate 302, and one end of each conveying screw 303 is fixed with a driven bevel gear 304 meshing with the driving bevel gear 305, and one end of each liquid suction tube 301 close to the lower shell 102 is connected to the inner side of the separation cylinder 101 through a transfer pipe 306; The sewage near the side wall of the reaction tank 1 can be evenly sucked into the impurity collecting mechanism through the liquid suction mechanism, so that after the sewage is centrifugally separated in the impurity collecting mechanism, the sewage with flocs separated is discharged back to a position near the center of the inner side of the reaction tank 1, so that the sewage in the reaction tank 1 can be continuously circulated, so that the sewage at various positions can be separated by the impurity collecting mechanism.

[0025] Furthermore, a baffle 114 is detachably provided on one side of each collecting tank 105, a plurality of through holes 115 are evenly provided on the surface of each baffle 114, and a plurality of wrapped rubber strips 116 are evenly provided on the surface of each baffle 114 located inside the collecting tank 105; When the flocs impacted into the inner side of the collecting tank 105 flow between the multiple wrapped rubber strips 116, the multiple wrapped rubber strips 116 can clamp the flocs, thereby further preventing the flocs from flowing back. The sewage that penetrates into the inner side of the collecting tank 105 through the internal filter holes of the arc filter 108 can flow back to the inner side of the reaction tank 1 through the multiple through holes 115. By removing the baffle 114, the flocs mixed in the gaps between the multiple wrapped rubber strips 116 can be cleaned, thereby ensuring that the flocs are continuously clamped and collected.

[0026] Furthermore, a reflux pipe 117 is inserted at the position of each reflux hole 120 on the outside of the separation cylinder 101, and a plurality of reflux branches 118 are horizontally inserted on one side of each reflux pipe 117; Each reflux hole 120 is connected to a reflux pipe 117. The sewage discharged through the reflux hole 120 is then discharged to the inner side of the reaction tank 1 at the center position through multiple reflux branches 118 on one side of the reflux pipe 117, and the sewage originally located at the center position is squeezed to the side wall position of the reaction tank 1, thereby helping to quickly circulate the sewage inside the reaction tank 1.

[0027] Furthermore, the recoil cleaning mechanism includes an air pump 207 mounted on the inner side of the upper shell 113, a fixed sleeve 204 fixed on the inner side of the upper shell 113 at a position corresponding to each rotating tube 106, and an inner partition 202 (such as Figure 8As shown), multiple jet ports 201 are provided on both sides of each rotating tube 106 and located on the inner side of the arc filter 108, the outlet end of the air pump 207 is connected to a flow-dividing housing 208, and the inlet end of the air pump 207 is connected to an extended air inlet pipe 209 extending to the outside of the reaction tank 1, and a connecting pipe 205 is inserted on the outer side of each fixed sleeve 204, and multiple connecting pipes 205 are arranged on the fixed sleeve 204 at a position on one side of the collecting tank 105 close to the corresponding position, and one end of each connecting pipe 205 is connected to the inner side of the flow-dividing housing 208 through the air delivery pipe 206, and one end of the rotating tube 106 is provided with two air inlets 203 (as shown) which can be connected to the connecting pipe 205 at both sides. Figure 6 As shown in FIG. 1 ), the inner partition 202 divides the inner side of the rotating tube 106 into two air cavities respectively connected to the two filter cavities, the two air inlets 203 are respectively connected to the two air cavities, and the multiple air jets 201 located on both sides are respectively connected to the two filter cavities; Through the backwash cleaning mechanism, each arc filter 108 can be backwashed and cleaned in turn, and a high-speed airflow is blown out from the other side of the arc filter 108, so that the flocs stuck in the filter holes of the arc filter 108 can fall off, and the fallen flocs can be retained in the corresponding collection tank 105, which can prevent the flocs from being mixed into the sewage again. At the same time, it ensures that the filter holes of the arc filter 108 maintain sufficient space to continuously collect flocs in the sewage, further improving the separation and collection efficiency of the flocs.

[0028] Furthermore, the plurality of air jets 201 are all in a conical structure; The conical air jet 201 can increase the diffusion angle of the ejected airflow, so that each filter hole inside the arc-shaped filter screen 108 can be impacted by the airflow, thereby ensuring that the flocs in each filter hole can be blown off.

[0029] Furthermore, two lifting electric cylinders 2 are installed on the outside of the reaction tank 1, and lifting rods 4 are fixed to the telescopic ends of the two lifting electric cylinders 2. The lower side of the lifting rod 4 is fixedly connected to the upper shell 113 of the driving mechanism through the suspension rod 3; The telescopic movement of the telescopic end of the lifting electric cylinder 2 can drive the lifting rod 4 to move up and down. The lifting rod 4 drives the impurity separation mechanism to move back and forth up and down inside the reaction tank 1 through the suspension rod 3, thereby separating and treating sewage at different depths in the reaction tank 1, thereby improving the collection effect of flocs in the sewage.

[0030] Working principle: When in use, the desulfurized and denitrified sewage added with flocculants reacts inside the reaction tank 1, and the sewage gradually produces flocs under the action of the flocculants. In order to improve the separation efficiency between the flocs and the sewage after the reaction, the second motor 119 can be controlled to drive the rotating shaft 103 to rotate, and the rotating shaft 103 drives the active bevel gear 305 of the liquid suction mechanism to rotate. The active bevel gear 305 drives multiple driven bevel gears 304 to rotate through the teeth, and the multiple driven bevel gears 304 respectively drive multiple conveying screws 303 rotates, and when the multiple conveying screws 303 rotate, the sewage near the side wall of the inner side of the reaction tank 1 can be sucked into the inner side of the suction pipe 301, and then sent to the inner lower end of the separation cylinder 101 through the transfer pipe 306 at one end of each suction pipe 301. The sewage inside each suction pipe 301 can be continuously transported to the inner side of the separation cylinder 101, so that the sewage inside the separation cylinder 101 is subjected to upward pressure. At the same time, the rotating shaft 103 can drive the multiple push plates 104 to rotate, and the multiple push plates 104 drive The sewage inside the separation cylinder 101 rotates at a high speed, so that the flocs with a larger density can be gathered to the side wall of the separation cylinder 101. The flocs gathered to the side wall of the separation cylinder 101 can be stuck in the filter holes inside the multiple arc-shaped filter screens 108, and the sewage is discharged back into the inside of the reaction tank 1 through the multiple reflux holes 120 at the upper end of the separation cylinder 101, so that the flocs can be separated from the sewage without waiting for the flocs to settle naturally, thereby greatly improving the separation efficiency of the flocs and the sewage, and improving the sewage treatment efficiency. Each reflux hole 120 is connected to a reflux pipe 117, and the sewage discharged through the reflux hole 120 is discharged to the center of the inside of the reaction tank 1 through the multiple reflux branches 118 on one side of the reflux pipe 117, and the sewage originally located at the center is squeezed to the side wall of the reaction tank 1, so that it can help to quickly circulate the sewage inside the reaction tank 1, ensuring that the flocs in the sewage at various positions inside the reaction tank 1 can be fully separated, thereby improving the sewage treatment efficiency; The first motor 110 of the driving mechanism drives the driving gear 111 to rotate slowly, and the driving gear 111 drives the multiple driven gears 109 to rotate synchronously through tooth meshing, and the multiple driven gears 109 respectively drive the multiple slowly rotating tubes 106 to rotate synchronously, and the multiple rotating tubes 106 respectively drive the multiple arc-shaped filter screens 108 to rotate accordingly. When the filter holes of the arc-shaped filter screen 108 located inside the separation cylinder 101 are filled with flocs, it can rotate to the inside of the collection tank 105 with the rotating cylinder 107, and the arc-shaped filter screen 108 on the opposite side rotates from the inside of the collection tank 105 to the inside of the separation cylinder 101 to continuously collect the flocs; When the arc filter 108 filled with flocs rotates to the inner side of the collection tank 105, an air inlet 203 close to one side of the arc filter 108 can be connected to the connecting pipe 205, and at the same time, the air pump 207 of the recoil cleaning mechanism operates to inhale the outside air through the extended air inlet pipe 209, and then presses the air into the inner side of the diversion shell 208, and then presses the air into the inner side of the rotating tube 106 through multiple air delivery pipes 206 and the connecting pipe 205. Since the air inlet 203 close to the side of the collection tank 105 is connected to the connecting pipe 205 at this time, the air flows into an air cavity on the inner side of the rotating tube 106 close to the collection tank 105, and then the air passes through the side of the air cavity. The multiple air jets 201 spray toward the inner side of a filter cavity near one side of the collecting tank 105. Under the impact of the airflow, the flocs blocked in the filter holes are impacted from the other side of the arc filter 108, so that the flocs in the filter holes can be impacted toward the inner side of the collecting tank 105, so that the flocs falling from the filter holes of the arc filter 108 are isolated inside the collecting tank 105. Therefore, the rotating tube 106 and the rotating cylinder 107 drive the arc filter 108 to rotate continuously, and the flocs in the sewage can be continuously transferred to the inner side of the collecting tank 105, so that the flocs can be prevented from being mixed into the sewage again, thereby further improving the separation efficiency of the flocs in the sewage. Since a baffle 114 is detachably provided on one side of each collecting tank 105, and a plurality of wrapped rubber strips 116 are evenly provided on the surface of each baffle 114 located on the inner side of the collecting tank 105, when the flocs impacted into the inner side of the collecting tank 105 flow between the plurality of wrapped rubber strips 116, since the wrapped rubber strips 116 have a certain elasticity, the adjacent wrapped rubber strips 116 can squeeze the flocs in the gaps therebetween, thereby increasing the friction between the wrapped rubber strips 116 and the flocs, thereby limiting the movement of the flocs, thereby further avoiding the reverse backflow of the flocs, and the sewage that penetrates into the inner side of the collecting tank 105 through the internal filter holes of the arc filter 108 can flow back to the inner side of the reaction tank 1 through the plurality of through holes 115, and the flocs mixed in the gaps between the plurality of wrapped rubber strips 116 can be cleaned by removing the baffle 114, thereby ensuring continuous clamping and collection of the flocs.

[0031] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A catalytic flue gas desulfurization and denitrification wastewater treatment device, comprising a reaction tank (1), characterized in that: An impurity collecting mechanism that can move up and down is provided inside the reaction tank (1); The impurity collecting mechanism comprises a separation cylinder (101) and a lower shell (102); a second motor (119) is installed at the lower end of the outer side of the lower shell (102); a rotating shaft (103) extending to the inside of the separation cylinder (101) and the lower shell (102) is fixed to the driving end of the second motor (119); a plurality of collecting grooves (105) are arranged on the side wall of the separation cylinder (101); a plurality of push plates (104) located inside the separation cylinder (101) are fixed outside the rotating shaft (103); and the inner side of each of the collecting grooves (105) is rotatably connected to a push plate (104). A rotating tube (106), the outer side of each rotating tube (106) being fixed with a rotating cylinder (107) via two outer partitions (112), the outer partition (112) dividing the inner side of the rotating cylinder (107) into two filter chambers, two arc-shaped filter screens (108) being symmetrically arranged on both sides of each rotating cylinder (107), a driving mechanism and a backwash cleaning mechanism being arranged between the plurality of rotating tubes (106), a liquid suction mechanism being arranged on the outer side of the lower shell (102), and a plurality of reflux holes (120) being opened on the outer upper end of the separation cylinder (101).

2. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 1 is characterized in that: The driving mechanism comprises an upper shell (113) fixed to the upper end of the separation cylinder (101) and a driven gear (109) fixed to the upper end of the outer side of each rotating tube (106) and located inside the upper shell (113); a first motor (110) is installed inside the upper shell (113); a driving gear (111) is fixed to the driving end of the first motor (110); and the driving gear (111) meshes with each driven gear (109) through teeth.

3. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 1 is characterized in that: The liquid suction mechanism comprises a plurality of liquid suction tubes (301) inserted on the outside of the lower shell (102), and a driving bevel gear (305) fixed on the outside of the rotating shaft (103) and located on the inside of the lower shell (102); an inner end of each of the liquid suction tubes (301) is isolated from the inner side of the lower shell (102) by a sealing plate (302); and a conveying screw (303) is rotatably connected to the inner side of each of the liquid suction tubes (301) through the sealing plate (302); a driven bevel gear (304) meshing with the driving bevel gear (305) is fixed on one end of each of the conveying screws (303); and an end of each of the liquid suction tubes (301) close to the lower shell (102) is connected to the inner side of the separation cylinder (101) through a transfer tube (306).

4. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 1 is characterized in that: A baffle (114) is detachably provided on one side of each of the collecting grooves (105); a plurality of through holes (115) are evenly provided on the surface of each of the baffles (114); and a plurality of wrapping rubber strips (116) are evenly provided on the surface of each of the baffles (114) located inside the collecting groove (105).

5. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 3 is characterized in that: A reflux pipe (117) is inserted at the position of each reflux hole (120) on the outside of the separation cylinder (101), and a plurality of reflux branch pipes (118) are horizontally inserted on one side of each reflux pipe (117).

6. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 1 is characterized in that: The recoil cleaning mechanism comprises an air pump (207) mounted on the inner side of the upper shell (113), a fixed sleeve (204) fixed on the inner side of the upper shell (113) at a position corresponding to each rotating tube (106), an inner partition (202) fixed on the inner side of each rotating tube (106), and a plurality of air jets (201) provided on both sides of each rotating tube (106) and located on the inner side of the arc-shaped filter screen (108). The air outlet end of the air pump (207) is connected to a flow diversion housing (208), and a connecting pipe (201) is inserted on the outer side of each fixed sleeve (204). 205), one end of each of the connecting pipes (205) is connected to the inner side of the flow-dividing shell (208) via an air delivery pipe (206), one end of the rotating pipe (106) is provided with two air inlets (203) that can be connected to the connecting pipe (205) at two sides, the inner partition (202) divides the inner side of the rotating pipe (106) into two air cavities that are respectively connected to two filter cavities, the two air inlets (203) are respectively connected to the two air cavities, and the multiple air jets (201) located on both sides are respectively connected to the two filter cavities.

7. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 6 is characterized in that: The plurality of air jets (201) are all in a conical structure.

8. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 6 is characterized in that: The plurality of connecting pipes (205) are all arranged on the fixed sleeve (204) at a position on one side of the collecting tank (105) close to a corresponding position.

9. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 6, characterized in that: The air inlet end of the air pump (207) is connected to an extended air inlet pipe (209) extending to the outside of the reaction tank (1).

10. The catalytic flue gas desulfurization and denitrification wastewater treatment device according to claim 2, characterized in that: Two lifting electric cylinders (2) are installed on the outside of the reaction tank (1), and lifting rods (4) are fixed to the telescopic ends of the two lifting electric cylinders (2). The lower side of the lifting rod (4) is fixedly connected to the upper shell (113) of the driving mechanism through a suspension rod (3).

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