A catalytic flue gas desulfurization and denitrification sewage treatment device

Abstract

The present invention relates to the technical field of sewage treatment, and in particular to a catalytic flue gas desulfurization and denitrification sewage treatment device, which includes a reaction tank, and an impurity collection mechanism that can move up and down is arranged inside the reaction tank; the impurity collection 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, a rotating shaft extending into the separation cylinder and the lower shell is fixed to the driving end of the second motor, and a plurality of collection grooves are arranged on the side wall of the separation cylinder. In the present invention, the liquid suction mechanism sucks the sewage near the side wall in 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, flings the flocs in the sewage into the filter holes of a plurality of arc-shaped filter screens, and the sewage flows back into the reaction tank again through a plurality of return holes located at the upper end of the separation cylinder, so that the sewage in the reaction tank and the suspended flocs therein can be quickly separated, greatly improving the sewage treatment efficiency.

Description

Technical Field

[0001] The present 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 applied to the chemical industry with multiple nitrogen oxides and sulfur oxides, which absorbs nitrogen and sulfur elements in the flue gas through chemical reactions. The waste liquid from flue gas desulfurization and denitrification has the characteristics of high turbidity, large suspended solid content, and low particle viscosity. In the treatment process, processes such as neutralization, precipitation, flocculation, and clarification are mostly used.

[0003] After retrieval, a Chinese patent with the publication number: CN221166215U discloses a sewage treatment device for petrochemical flue gas desulfurization and denitrification. The waste barrel is communicated with the sedimentation barrel. The waste discharge pipe is arranged below the sedimentation barrel and is inclined. The feed joint is fixedly arranged through the waste discharge pipe, and the connecting elbow is fixedly arranged through the lower end of the sedimentation barrel. The connecting elbow is flange-connected with the feed joint. The discharge joint is fixedly arranged through the upper end of the waste discharge pipe, and the connecting joint is fixedly arranged through the lower end of the waste discharge pipe.

[0004] Based on the above retrieval and combined with practical problems, it is found that for the existing sewage treatment device, the suspended solids in the sewage are usually separated by gravity sedimentation. However, the density difference between some suspended solids and the sewage is very small, so it takes a long time for the suspended solids to completely settle, which affects the sewage treatment efficiency. In order to improve the treatment efficiency, some enterprises adopt a treatment process of filtering the suspended solids in the sewage through a filter screen. However, when treating a large amount of sewage, the filter screen will be quickly blocked by the suspended solids, which affects the normal filtering effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a sewage treatment device for catalytic flue gas desulfurization and denitrification to solve the problems raised in the above background art.

[0006] The technical solution of the present invention is: A catalytic flue gas desulfurization and denitrification sewage treatment device, including a reaction tank, and an impurity collection mechanism that can move up and down is arranged inside the reaction tank; the impurity collection 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, a rotating shaft extending into the separation cylinder and the lower shell is fixed at the driving end of the second motor, a plurality of collection grooves are arranged on the side wall of the separation cylinder, a plurality of push plates located inside the separation cylinder are fixed on the outer side of the rotating shaft, a rotating tube is rotatably connected to the inside of each collection groove, a rotating cylinder is fixed on the outer side of each rotating tube through two outer partitions, and the inner side of the rotating cylinder is divided into two filtering chambers by the outer partitions, two arc-shaped filter meshes are symmetrically arranged on both sides of each rotating cylinder, a driving mechanism and a backwashing and 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 at the upper end of the separation cylinder and a driven gear fixed at the upper end of the outer side of each rotating tube and located inside the upper shell. A first motor is installed inside the upper shell, a driving gear is fixed at the driving end of the first motor, and the driving gear is engaged with each driven gear through teeth.

[0008] Preferably, the liquid suction mechanism includes a plurality of liquid suction tubes inserted into the outer side of the lower shell, and a driving bevel gear fixed on the outer side of the rotating shaft and located inside the lower shell. One end of the inner side of each liquid suction tube is isolated from the inside of the lower shell through a sealing plate, and a conveying screw is rotatably connected through the sealing plate in the inner side of each liquid suction tube. A driven bevel gear engaged with the driving bevel gear is fixed at one end of each conveying screw, and one end of each liquid suction tube close to the lower shell is communicated with the inside of the separation cylinder through a transfer pipe.

[0009] Preferably, a baffle is detachably arranged on one side of each collection groove. A plurality of through holes are evenly opened on the surface of each baffle, and a plurality of rubber strips are evenly arranged on the surface of each baffle located inside the collection groove.

[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 branch pipes are horizontally inserted on one side of each reflux pipe.

[0011] Preferably, the backflush cleaning mechanism includes an air pump installed inside the upper shell, fixed sleeves fixed inside the upper shell at positions corresponding to each rotating tube, inner partitions fixed inside each rotating tube, and a plurality of air jet openings formed on both sides of each rotating tube and located inside the arc-shaped filter screen. The air outlet end of the air pump is connected to a flow splitting housing. A connecting pipe is inserted outside each fixed sleeve. One end of each connecting pipe is communicated with the inside of the flow splitting housing through an air delivery pipe. Two air inlet openings that can be communicated with the connecting pipes are formed at both sides at one end of the rotating tube. The inner partition divides the inside of the rotating tube into two air chambers respectively communicated with the two filter chambers. The two air inlet openings are respectively communicated with the two air chambers. The plurality of air jet openings located on both sides are respectively communicated with the two filter chambers.

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

[0013] Preferably, the plurality of connecting pipes are all arranged on one side of the fixed sleeve close to the corresponding collection tank.

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

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

[0016] The present invention provides a catalytic flue gas desulfurization, denitrification and sewage treatment device through improvement. Compared with the prior art, it has the following improvements and advantages:

[0017] Firstly: The present invention sucks the sewage near the side wall in the reaction tank into the separation cylinder of the impurity collection mechanism through the liquid suction mechanism. At the same time, the impurity separation mechanism centrifugally separates the sewage in the separation cylinder, flings the flocs in the sewage into the filter holes of the plurality of arc-shaped filter screens, and the sewage then flows back into the reaction tank through the plurality of return holes located at the upper end of the separation cylinder, so that the sewage in the reaction tank and the suspended flocs therein can be quickly separated, greatly improving the sewage treatment efficiency.

[0018] Secondly: The present invention can sequentially backflush and clean each arc-shaped filter screen through the backflush cleaning mechanism, blowing high-speed air flow from the other side of the arc-shaped filter screen, so that the flocs stuck in the filter holes of the arc-shaped filter screen fall off, and the fallen flocs can be left in the corresponding collection tank, which can prevent the flocs from mixing back into the sewage, and at the same time ensure that there is enough space in the filter holes of the arc-shaped filter screen to continuously collect the flocs in the sewage, further improving the separation and collection efficiency of the flocs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings required for the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 Schematic diagram of the internal structure of the reaction tank in the present invention;

[0022] Figure 3 Schematic cross-sectional structure diagram of the impurity separation mechanism and the liquid suction mechanism in the present invention;

[0023] Figure 4 For the present invention Figure 3 Enlarged structural diagram of part A;

[0024] Figure 5 Schematic diagram of the disassembled structure of the impurity separation mechanism in the present invention;

[0025] Figure 6 For the present invention Figure 5 Enlarged structural diagram of part B;

[0026] Figure 7 Schematic diagram of the disassembled structure of the rotating tube and the rotating cylinder in the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged structural diagram of part C;

[0028] Figure 9 Schematic diagram of the disassembled structure of the baffle in the present invention.

[0029] Reference numerals:

[0030] 1. Reaction tank; 2. Lifting electric cylinder; 3. Suspension rod; 4. Lifting rod; 101. Separation cylinder; 102. Lower shell; 103. Rotating shaft; 104. Pusher plate; 105. Collection tank; 106. Rotating pipe; 107. Rotating cylinder; 108. Arc-shaped filter screen; 109. Driven gear; 110. First motor; 111. Driving gear; 112. Outer partition plate; 113. Upper shell; 114. Baffle plate; 115. Through hole; 116. Wrapping rubber strip; 117. Return pipe; 118. Return branch pipe; 119. Second motor; 120. Return hole; 201. Jet orifice; 202. Inner partition plate; 203. Air inlet; 204. Fixed sleeve; 205. Connecting pipe; 206. Air delivery pipe; 207. Air pump; 208. Shunt housing; 209. Extended air inlet pipe; 301. Liquid suction pipe; 302. Sealing plate; 303. Conveyor screw; 304. Driven bevel gear; 305. Driving bevel gear; 306. Transfer pipe. Detailed implementation mode

[0031] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] The present invention provides a catalytic flue gas desulfurization and denitrification sewage treatment device by improvement. The technical solution of the present invention is as follows:

[0033] As Figures 1 to 9 shown, the embodiment of the present invention provides a catalytic flue gas desulfurization and denitrification sewage treatment device, including a reaction tank 1, and an impurity collection mechanism that can move up and down is arranged inside the reaction tank 1; the impurity collection mechanism includes 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, and a rotating shaft 103 extending into the inside of the separation cylinder 101 and the lower shell 102 is fixed at the driving end of the second motor 119. A plurality of collection tanks 105 are arranged on the side wall of the separation cylinder 101. A plurality of pusher plates 104 located inside the separation cylinder 101 are fixed on the outer side of the rotating shaft 103. A rotating pipe 106 is rotatably connected to the inside of each collection tank 105. A rotating cylinder 107 is fixed on the outer side of each rotating pipe 106 through two outer partition plates 112 (as Figure 8 shown), and the outer partition plates 112 divide the inside 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 backwashing and cleaning mechanism are arranged between the plurality of rotating pipes 106. A liquid suction mechanism is arranged on the outer side of the lower shell 102. A plurality of return holes 120 are opened at the upper end of the outer side of the separation cylinder 101.

[0034] 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 outer upper end of each rotating tube 106 and located inside the upper shell 113. A first motor 110 is installed inside the upper shell 113, and a driving gear 111 is fixed to the driving end of the first motor 110. The driving gear 111 meshes with each driven gear 109 through teeth;

[0035] When the first motor 110 of the driving mechanism operates, it drives the driving gear 111 to rotate slowly. The driving gear 111 drives multiple driven gears 109 to rotate synchronously through tooth engagement. The multiple driven gears 109 respectively drive multiple slow-rotating tubes 106 to rotate synchronously. 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 screens 108 located inside the separation cylinder 101 are filled with flocculants, they can rotate with the rotating cylinder 107 to the inside of the collection tank 105. The arc-shaped filter screens 108 on the opposite side rotate from the inside of the collection tank 105 to the inside of the separation cylinder 101 to continuously collect the flocculants.

[0036] Further, the liquid suction mechanism includes multiple liquid suction tubes 301 inserted outside the lower shell 102 and a driving bevel gear 305 fixed to the outer side of the rotating shaft 103 and located inside the lower shell 102. The inner end of each liquid suction tube 301 is isolated from the inside of the lower shell 102 through a sealing plate 302, and a conveying screw 303 is rotatably connected through the sealing plate 302 inside each liquid suction tube 301. One end of each conveying screw 303 is fixed with a driven bevel gear 304 that meshes with the driving bevel gear 305. One end of each liquid suction tube 301 close to the lower shell 102 is communicated with the inside of the separation cylinder 101 through a transfer tube 306;

[0037] Through the liquid suction mechanism, the sewage near the side wall in the reaction tank 1 can be evenly sucked into the impurity collection mechanism. After the sewage is centrifugally separated in the impurity collection mechanism, the sewage from which the flocculants have been separated is discharged back to a position near the center inside the reaction tank 1. Thus, the sewage in the reaction tank 1 can be continuously circulated, and the sewage at each position can pass through the impurity collection mechanism for separation.

[0038] Further, a baffle 114 is detachably provided on one side of each collection tank 105. A plurality of through holes 115 are evenly formed on the surface of each baffle 114, and a plurality of rubber strip wrappings 116 are evenly arranged on the surface of each baffle 114 located inside the collection tank 105;

[0039] 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.

[0040] 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;

[0041] 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.

[0042] 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 8 As 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;

[0043] Through the backflush cleaning mechanism, each arc-shaped filter screen 108 can be backflushed and cleaned in sequence, and high-speed air flow is blown out from the other side of the arc-shaped filter screen 108, so that the flocs stuck in the filter holes of the arc-shaped filter screen 108 fall off. The fallen flocs can stay in the corresponding collection tank 105, which can prevent the flocs from mixing back into the sewage, and at the same time ensure that there is enough space in the filter holes of the arc-shaped filter screen 108 to continuously collect the flocs in the sewage, further improving the separation and collection efficiency of the flocs.

[0044] Furthermore, multiple air jet nozzles 201 are all in a conical structure;

[0045] The conical air jet nozzles 201 can increase the diffusion angle of the ejected air flow, so that each filter hole inside the arc-shaped filter screen 108 can be impacted by the air flow, ensuring that the flocs in each filter hole can be blown off.

[0046] Furthermore, two lifting electric cylinders 2 are installed on the outer side of the reaction tank 1. The telescopic ends of the two lifting electric cylinders 2 are fixed with lifting rods 4, and 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;

[0047] 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 reciprocate up and down inside the reaction tank 1 through the suspension rod 3, so as to separate and treat the sewage at different depths in the reaction tank 1, improving the collection effect of the flocs in the sewage.

[0048] Working principle: When in use, the desulfurized and denitrified sewage with flocculant added reacts inside the reaction tank 1. Flocs gradually form in the sewage under the action of the flocculant. To improve the separation efficiency between the flocs and the reacted sewage, the second motor 119 can be controlled to operate to drive the rotating shaft 103 to rotate. The rotating shaft 103 drives the driving bevel gear 305 of the liquid suction mechanism to rotate. The driving bevel gear 305 drives multiple driven bevel gears 304 to rotate through teeth. Multiple driven bevel gears 304 respectively drive multiple conveying screws 303 to rotate. When the multiple conveying screws 303 rotate, the sewage near the side wall inside the reaction tank 1 can be sucked into the inside of the liquid suction pipe 301, and then sent to the lower end inside the separation cylinder 101 through the transfer pipe 306 at one end of each liquid suction pipe 301. The sewage inside each liquid suction pipe 301 can continuously be conveyed to the inside of the separation cylinder 101. Therefore, the sewage inside the separation cylinder 101 is under an upward pressure. At the same time, the rotating shaft 103 can drive multiple push plates 104 to rotate. The multiple push plates 104 drive the sewage inside the separation cylinder 101 to rotate at a high speed, so that the flocs with a larger density gather towards the side wall position of the separation cylinder 101. The flocs gathered on 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 re-discharged into the inside of the reaction tank 1 through the multiple return holes 120 at the upper end of the separation cylinder 101, thereby separating the flocs from the sewage. There is no need to wait for the flocs to settle naturally, thus greatly improving the separation efficiency between the flocs and the sewage and improving the sewage treatment efficiency. Each return hole 120 is connected to a return pipe 117. The sewage discharged through the return hole 120 is then discharged to the center position inside the reaction tank 1 through multiple return branch pipes 118 on one side of the return pipe 117, and the sewage originally at the center position is squeezed to the side wall position of the reaction tank 1, which helps to quickly circulate the sewage inside the reaction tank 1, ensuring that the flocs in the sewage at all positions inside the reaction tank 1 can be fully separated and improving the sewage treatment efficiency;

[0049] The first motor 110 of the driving mechanism operates to drive the driving gear 111 to rotate slowly. The driving gear 111 drives multiple driven gears 109 to rotate synchronously through tooth engagement. Multiple driven gears 109 respectively drive multiple slow-rotating pipes 106 to rotate synchronously. Multiple rotating pipes 106 respectively drive multiple arc-shaped filter screens 108 to rotate accordingly. When the filter holes of the arc-shaped filter screens 108 inside the separation cylinder 101 are filled with flocs, they can rotate into the inside of the collection tank 1 along with the rotating cylinder 107, and the arc-shaped filter screen 108 on the opposite side rotates from the inside of the collection tank 1 to the inside of the separation cylinder 101 to continuously collect the flocs;

[0050] 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.

[0051] 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.

[0052] 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 sewage treatment device, comprising a reaction tank (1), characterized in that, An impurity collection mechanism that can move up and down is arranged inside the reaction tank (1). The impurity collection mechanism includes 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 into the interior of the separation cylinder (101) and the lower shell (102) is fixed to the driving end of the second motor (119). A plurality of collection 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 to the outer side of the rotating shaft (103). A rotating tube (106) is rotatably connected to the inside of each collection groove (105). A rotating cylinder (107) is fixed to the outer side of each rotating tube (106) through two outer partition plates (112). The outer partition plates (112) divide the inside of the rotating cylinder (107) into two filtering chambers. Two arc-shaped filter meshes (108) are symmetrically arranged on both sides of each rotating cylinder (107). A driving mechanism and a backwashing and cleaning mechanism are arranged between the plurality of rotating tubes (106). A liquid suction mechanism is arranged on the outer side of the lower shell (102). A plurality of reflux holes (120) are formed in the upper end of the outer side of the separation cylinder (101).

2. The catalytic flue gas desulfurization and denitrification sewage treatment device according to claim 1, wherein: 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 engaged with each driven gear (109) through teeth.

3. The catalytic flue gas desulfurization and denitrification sewage treatment device according to claim 1, wherein: The liquid suction mechanism includes a plurality of liquid suction tubes (301) inserted into the outer side of the lower shell (102), and a driving bevel gear (305) fixed to the outer side of the rotating shaft (103) and located inside the lower shell (102). One end of the inner side of each liquid suction tube (301) is isolated from the inside of the lower shell (102) through a sealing plate (302). A conveying screw (303) is rotatably connected through the sealing plate (302) in the inner side of each liquid suction tube (301). A driven bevel gear (304) engaged with the driving bevel gear (305) is fixed to one end of each conveying screw (303). One end of each liquid suction tube (301) close to the lower shell (102) is communicated with the inside of the separation cylinder (101) through a transfer tube (306).

4. The catalytic flue gas desulfurization and denitrification sewage treatment device according to claim 1, wherein: A baffle (114) is detachably arranged on one side of each collection groove (105). A plurality of through holes (115) are evenly formed on the surface of each baffle (114). A plurality of wrapping rubber strips (116) are evenly arranged on the surface of each baffle (114) located inside the collection groove (105).

5. The catalytic flue gas desulfurization and denitrification sewage treatment device according to claim 3, wherein: A reflux tube (117) is inserted at the position of each reflux hole (120) on the outer side of the separation cylinder (101). A plurality of reflux branch tubes (118) are horizontally inserted on one side of each reflux tube (117).

6. The catalytic flue gas desulfurization and denitrification sewage treatment device according to claim 1, characterized in that: The recoil cleaning mechanism includes an air pump (207) installed inside the upper shell (113), a fixed sleeve (204) fixed inside the upper shell (113) at the position corresponding to each rotating tube (106), an inner partition (202) fixed inside each rotating tube (106), and a plurality of air jet openings (201) formed on both sides of each rotating tube (106) and located inside the arc-shaped filter screen (108). The air outlet end of the air pump (207) is connected to a shunt housing (208). A connecting pipe (205) is inserted outside each fixed sleeve (204). One end of each connecting pipe (205) is communicated with the inside of the shunt housing (208) through an air pipe (206). Two air inlet openings (203) that can be communicated with the connecting pipe (205) are formed at both side positions at one end of the rotating tube (106). The inner partition (202) divides the inside of the rotating tube (106) into two air cavities respectively communicated with two filter cavities. The two air inlet openings (203) are respectively communicated with the two air cavities. The plurality of air jet openings (201) located on both sides are respectively communicated with the two filter cavities.

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

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

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

10. The catalytic flue gas desulfurization and denitrification sewage treatment device according to claim 2, wherein: Two lifting electric cylinders (2) are installed outside the reaction tank (1). The telescopic ends of the two lifting electric cylinders (2) are fixed with lifting rods (4). 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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