Piezoelectric effect enhancement-based photocatalytic decomposition pollutant system

Abstract

The invention discloses a photocatalytic decomposition pollutant system based on piezoelectric effect enhancement, which comprises one or more catalytic decomposition devices, the inlet end of each catalytic decomposition device is connected with the outlet end of a multi-stage filtering device, the outlet end of each catalytic decomposition device is communicated with the inlet end of a filtering device, the inlet end of a suction water pump is communicated with the outlet end of the filtering device, and the outlet end of the suction water pump is communicated with the inlet end of the multi-stage filtering device. The inlet end of the catalyst mixing kettle is communicated with the catalytic decomposition device, the slag outlet of the filtering device is communicated with the slag collection kettle, and the outlet end of the suction water pump is communicated with the decomposition liquid collection kettle. The sewage treatment efficiency can be effectively improved, the purpose of fully purifying the sewage is ensured, secondary pollution to the sewage is avoided, and the purified water is safe and pollution-free. The invention is suitable for the technical field of sewage treatment.

Description

Technical Field

[0001] The present invention belongs to the technical field of pollutant treatment, and in particular, relates to a photocatalytic pollutant decomposition system based on piezoelectric effect enhancement. Background Art

[0002] At present, in the field of sewage treatment, in order to fully treat harmful substances, organic matter, etc. in sewage, chemical agents are usually added to sewage, so that the chemical agents react with harmful substances, organic matter, etc. in sewage, and the reaction products gradually flocculate and precipitate, and then the supernatant is tested, and discharged into the external environment after meeting the discharge standards, and the precipitate is collected and processed separately. However, since the amount of chemical agents added and the adequacy of mixing cannot be ensured, more or less chemical agents will remain in the supernatant, and when directly discharged into the external environment, it will cause environmental pollution. In addition, the time for chemical agents to react with harmful substances, organic matter, etc. in sewage is relatively long, and the flocculation and precipitation time of flocculated precipitates is relatively long, which affects the efficiency of sewage treatment. Summary of the invention

[0003] The present invention provides a photocatalytic pollutant decomposition system based on piezoelectric effect enhancement, which is used to improve the efficiency of sewage treatment, ensure the purpose of fully purifying sewage, avoid secondary pollution of sewage, and make the purified water safe and pollution-free.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement includes one or more catalytic decomposition devices whose inlet end is connected to the outlet end of a multi-stage filtering device, the outlet end of the catalytic decomposition device is connected to the inlet end of a filtering device, the inlet end of a suction water pump is connected to the outlet end of the filtering device, the inlet end of a catalyst mixing kettle is connected to the catalytic decomposition device, the slag outlet of the filtering device is connected to the slag collecting kettle, and the outlet end of the suction water pump is connected to the decomposition liquid collecting kettle.

[0005] Furthermore, the multi-stage filtering device includes a plurality of filter screens installed at intervals along the length direction of the filter kettle, and these filter screens divide the inner cavity of the filter kettle into a plurality of filter cavities. The mesh size of these filter screens increases along the flow direction of the sewage. The sewage enters through the inlet pipe of the filter kettle, and the filtered water enters the catalytic decomposition device through the outlet pipe of the filter kettle.

[0006] Furthermore, a sedimentation bucket is constructed at the lower end of each filter chamber, and the lower end of each sedimentation bucket is connected to the sewage main pipe through a sewage branch pipe, and a sewage control valve is installed on the sewage main pipe.

[0007] Furthermore, the filtering device includes a filter cartridge coaxially rotatably connected to the filter cartridge, and the ends of the filter cartridge and the filter cartridge that are away from each other are respectively constructed with a decomposition product inlet pipe and a filter outlet pipe, the decomposition product inlet pipe is connected to the outlet end of the catalytic decomposition device, and the filter outlet pipe is connected to the inlet end of the suction water pump, and a decomposition product flow control valve is installed on the decomposition product inlet pipe.

[0008] Furthermore, a guide blade is constructed on the outer peripheral wall of the filter cartridge, and the guide blade spirally extends from one end of the filter cartridge to the other end along the axis of the filter cartridge, and the pitch of the guide blade decreases along the flow direction of the water body, and a discharge joint is constructed at the lower part of the peripheral wall at one end of the filter cartridge away from the catalytic decomposition device, and a first transmission wheel is coaxially mounted on the filter discharge pipe, and the filter discharge pipe is rotatably connected to the inlet end of the suction pump.

[0009] Furthermore, the catalytic decomposition device includes a delivery pipe coaxially installed in the decomposition cylinder, an upper connecting seat and a lower connecting seat are arranged between the decomposition cylinder and the delivery pipe, the upper connecting seat and the lower connecting seat are both rotatably connected to the decomposition cylinder and the delivery pipe, a plurality of reaction tubes are connected between the upper connecting seat and the lower connecting seat, these reaction tubes are evenly arranged along the circumference of the decomposition cylinder, a primary reaction chamber is formed in the decomposition cylinder, the sewage enters the primary reaction chamber, and after passing through the primary reaction chamber of the reaction tube, enters the inlet end of the suction water pump through the tertiary reaction chamber of the delivery pipe, and a plurality of ultraviolet lamp tubes are evenly installed on the delivery pipe along its circumference.

[0010] Furthermore, a spiral groove is constructed on the peripheral wall of each reaction tube, and the spiral groove extends spirally along the axis of the reaction tube to both ends of the reaction tube. The spiral groove is formed on the outer peripheral wall of the reaction tube in the form of a spiral groove, and the spiral groove is in the form of a spiral protrusion on the inner wall of the reaction tube.

[0011] Furthermore, an upper connecting tube and a lower connecting tube are respectively constructed at the upper and lower ends of each of the reaction tubes, and the upper connecting tube and the lower connecting tube are respectively connected to the upper connecting seat and the lower connecting seat, and the upper connecting tube is connected to the upper adapter sleeve, and the upper adapter sleeve is rotatably connected to the outside of the conveying pipe, and the lower connecting tube is connected to the annular liquid collecting pipe, and a liquid collecting joint is constructed on the annular liquid collecting pipe, and a liquid collecting control valve is installed on the liquid collecting joint, and a second transmission wheel is coaxially assembled on the upper part of the upper adapter sleeve.

[0012] Furthermore, a liquid inlet sleeve is coaxially sleeved on the upper outer wall of the decomposition cylinder, a plurality of liquid inlet holes are opened on the decomposition cylinder and located at the position of the liquid inlet sleeve, the liquid inlet sleeve is connected with a liquid inlet pipe, the liquid inlet pipe is connected with a catalyst inlet joint, and the liquid inlet control valve and the catalyst control valve are respectively installed on the liquid inlet pipe and the catalyst inlet joint.

[0013] Furthermore, a lower adapter sleeve is mounted on the lower part of the delivery pipe, a plurality of silt guide holes are opened on the delivery pipe and in the lower adapter sleeve, a backwash joint is connected to the lower adapter sleeve, and a backwash control valve is installed on the backwash joint.

[0014] Due to the adoption of the above structure, the technical progress achieved by the present invention compared with the prior art is that: in the catalyst mixing kettle, the piezoelectric photocatalyst is mixed with water and stirred to be in a homogeneous state. The sewage is passed into the multi-stage filtering device, and the solid pollutants in the sewage are filtered by the multi-stage filtering device to obtain primary purified water. Under the action of the suction water pump, the primary purified water and the homogeneous piezoelectric photocatalyst mixed liquid enter the catalytic decomposition device according to a predetermined ratio, and are fully mixed in the catalytic decomposition device. During the mixing process, the piezoelectric photocatalyst decomposes the harmful substances and organic matter in the sewage through the irradiation of ultraviolet light. When it reaches the outlet of the catalytic decomposition device, the harmful substances and organic matter in the sewage are completely decomposed to obtain secondary purified water. Then, the secondary purified water enters the filtering device, and the filtering device separates the piezoelectric photocatalyst in the sewage and enters the slag collection kettle for recycling. The ultimate purified water obtained is pumped out by the suction water pump and discharged into the external environment, or recycled into the decomposition liquid collection kettle for later reuse. In summary, the present invention purifies sewage through piezoelectric photocatalysts, and its effect is greatly enhanced compared to photocatalysts. Moreover, the present invention can effectively improve the efficiency of sewage treatment, ensure the purpose of fully purifying sewage, avoid secondary pollution of sewage, and make the purified water safe and pollution-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0016] In the attached picture: Figure 1 A schematic diagram of a structure in which multiple catalytic decomposition devices are installed according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a structure in which a plurality of catalytic decomposition devices are arranged side by side according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a single catalytic decomposition device installed in an embodiment of the present invention; Figure 4 It is a schematic structural diagram of a multi-stage filtering device according to an embodiment of the present invention; Figure 5 It is a structural side view of a multi-stage filtering device according to an embodiment of the present invention; Figure 6 It is a structural schematic diagram of a catalytic decomposition device according to an embodiment of the present invention; Figure 7 It is a structural schematic diagram of the catalytic decomposition device from another angle according to an embodiment of the present invention; Figure 8 It is an axial structural cross-sectional view of the catalytic decomposition device according to an embodiment of the present invention; Fig. 9 for Figure 8 A magnified view of the structure of the middle A part; Fig.10 It is a structural schematic diagram of the connection between the decomposition cylinder and the liquid inlet sleeve in the catalytic decomposition device of an embodiment of the present invention; Fig.11 This is a schematic structural diagram of the connection between an upper connecting seat, a lower connecting seat and a plurality of reaction tubes in a catalytic decomposition device according to an embodiment of the present invention; Fig.12 This is a schematic structural diagram of the connection between the upper connecting seat, the lower connecting seat and the conveying pipe according to an embodiment of the present invention; Fig.13 This is a schematic diagram of the structure of a single reaction tube according to an embodiment of the present invention; Fig.14 This is a schematic diagram of the structure in which the lower ends of multiple reaction tubes are connected to the delivery tubes in an embodiment of the present invention; Fig.15 It is a structural schematic diagram of a filtering device according to an embodiment of the present invention; Fig.16 It is an axial structural cross-sectional view of the filtering device according to an embodiment of the present invention.

[0017] Labeled parts: 100-multi-stage filtration device, 101-filter kettle, 102-filter screen, 103-filter chamber, 104-inlet pipe, 105-outlet pipe, 106-sedimentation bucket, 107-drainage branch pipe, 108-drainage main pipe, 109-drainage control valve, 200-catalytic decomposition device, 201-decomposition cylinder, 202-primary reaction chamber, 203-reaction tube, 204-spiral groove, 205-secondary reaction chamber, 206-first water hole, 207- Upper connecting pipe, 208-lower connecting pipe, 209-upper connecting seat, 210-liquid inlet sleeve, 211-annular liquid chamber, 212-liquid inlet pipe, 213-liquid inlet control valve, 214-catalyst inlet joint, 215-catalyst control valve, 216-liquid collecting control valve, 217-annular liquid collecting pipe, 218-liquid collecting joint, 219-lower connecting seat, 220-adapter, 221-lower adapter sleeve, 222-backwash joint, 223-backwash control valve, 224-sludge guide hole, 225-liquid inlet hole, 226-upper connecting nut, 227-lower connecting nut, 228-sealing plug, 229-delivery pipe, 230-second transmission wheel, 231-upper adapter sleeve, 232-conveyor chamber, 233-second water hole, 234-upper connecting hole, 235-lower connecting hole, 236-connecting elbow, 237-rotating sleeve, 238-drainage joint, 239-drainage control valve, 240-third-stage reaction chamber, 300-filter device, 301-filter cartridge , 302-filter cartridge, 303-first chamber, 304-second chamber, 305-guide blades, 306-diverter cone, 307-decomposition material inlet pipe, 308-decomposition material flow control valve, 309-discharge connector, 310-filter discharge pipe, 311-first transmission wheel, 400-suction water pump, 500-slag collection kettle, 600-sewage main pipe, 700-catalyst main pipe, 800-backwash main pipe, 900-drainage main pipe, 901-drainage connector. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0019] The present invention discloses a photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement, such as Figure 1-16As shown, it includes a multi-stage filtering device 100, a filtering device 300, a suction water pump 400, a catalyst mixing kettle, a slag collecting kettle 500, a decomposition liquid collecting kettle and one or more catalytic decomposition devices 200. The present invention can adjust the number of catalytic decomposition devices 200 according to the amount of sewage purification to ensure that the sewage can be fully, continuously and efficiently purified. The inlet end of the catalytic decomposition device 200 is connected to the outlet end of the multi-stage filtering device 100, the outlet end of the catalytic decomposition device 200 is connected to the inlet end of the filtering device 300, the inlet end of the suction water pump 400 is connected to the outlet end of the filtering device 300, the inlet end of the catalyst mixing kettle is connected to the catalytic decomposition device 200, the slag outlet of the filtering device 300 is connected to the slag collecting kettle 500, and the outlet end of the suction water pump 400 is connected to the decomposition liquid collecting kettle. The working principle and advantage of the present invention are: in the present invention, the piezoelectric photocatalyst is mixed with water in the catalyst mixing kettle, and is stirred so as to always be in a homogeneous state. The sewage is passed into the multi-stage filtering device 100, and the solid pollutants in the sewage are filtered by the multi-stage filtering device 100 to obtain primary purified water. In the present invention, under the action of the suction water pump 400, the primary purified water and the homogeneous piezoelectric photocatalyst mixed liquid enter the catalytic decomposition device 200 according to a predetermined ratio, and are fully mixed in the catalytic decomposition device 200. During the mixing process, the piezoelectric photocatalyst decomposes the harmful substances and organic matter in the sewage through the irradiation of ultraviolet light. When it reaches the outlet of the catalytic decomposition device 200, the harmful substances and organic matter in the sewage are completely decomposed to obtain secondary purified water. Then, the secondary purified water enters the filtering device 300, and the filtering device 300 separates the piezoelectric photocatalyst in the sewage and enters the slag collection kettle 500 for recycling. The obtained ultimate purified water is extracted by the suction water pump 400 and discharged to the external environment, or recycled to the decomposition liquid collection kettle for later recycling. In summary, the present invention purifies sewage through piezoelectric photocatalysts, and its effect is greatly enhanced compared to photocatalysts. Moreover, the present invention can effectively improve the efficiency of sewage treatment, ensure the purpose of fully purifying sewage, avoid secondary pollution of sewage, and make the purified water safe and pollution-free.

[0020] As a preferred embodiment of the present invention, Figure 4 , 5As shown, the multi-stage filtering device 100 includes a filter kettle 101, in which a plurality of filter screens 102 are installed. The filter screens 102 are arranged at intervals along the length direction of the filter kettle 101, and the filter screens 102 divide the inner cavity of the filter kettle 101 into a plurality of filter chambers 103. The mesh numbers of the filter screens 102 increase along the flow direction of the sewage. The sewage enters through the inlet pipe 104 of the filter kettle 101, and the filtered water enters the catalytic decomposition device 200 through the outlet pipe 105 of the filter kettle 101. The sewage enters the filter kettle 101, and then passes through each filter chamber 103 in turn, and is filtered by the filter screens 102. The solid impurities in the sewage are filtered out in order from large to small, and the sewage finally enters the inner cavity through the outlet pipe 105 of the filter kettle 101 in the form of primary purified water. In order to collect and remove the solid impurities in each filter cavity 103, the present embodiment adopts the following measures: a sedimentation bucket 106 is constructed at the lower end of each filter cavity 103, and a sewage branch pipe 107 is constructed at the lower end of each sedimentation bucket 106. These sewage branch pipes 107 are connected to the sewage main pipe 108, and a sewage control valve 109 is installed on the sewage main pipe 108. The working principle and advantage of the present embodiment are: in the process of desilting the sedimentation bucket 106, the cleaning water is firstly jetted into each sedimentation bucket 106, and at the same time, the sewage control valve 109 is opened, and the silt extraction pump is used to suck the silt extraction main pipe, thereby achieving the purpose of fully discharging the solid impurities in the sedimentation bucket 106.

[0021] As a preferred embodiment of the present invention, Fig.15 , 16 As shown, the filter device 300 includes a filter cartridge 301 and a filter cartridge 302, the axis of the filter cartridge 301 coincides with the axis of the filter cartridge 302, the filter cartridge 302 is rotatably connected in the filter cartridge 301, a first chamber 303 is formed between the filter cartridge 301 and the filter cartridge 302, and a second chamber 304 is formed in the filter cartridge 302. Among them, the ends of the filter cartridge 301 and the filter cartridge 302 that are away from each other are respectively constructed with a decomposition substance inlet pipe 307104 and a filter outlet pipe 310, the decomposition substance inlet pipe 307104 is connected to the outlet end of the catalytic decomposition device 200, and the filter outlet pipe 310 is connected to the inlet end of the suction water pump 400, and a decomposition substance flow control valve 308 is installed on the decomposition substance inlet pipe 307104. The working principle and advantages of this embodiment are as follows: this embodiment uses the suction water pump 400 to perform suction, so that the secondary purified water enters the first chamber 303 through the outlet end of the catalytic decomposition device 200, and the piezoelectric photocatalyst in the secondary purified water is filtered and remains in the first chamber 303. After the ultimate purified water enters the filter cartridge 302, it enters the inlet end of the suction water pump 400 through the filter discharge pipe 310, and is then discharged by the suction water pump 400.

[0022] As a preferred embodiment of the present invention, Fig.16 As shown, a diverter cone 306 is constructed at one end of the filter cartridge 302 away from the filter discharge pipe 310. The diverter cone 306 diverts the water entering the first chamber 303 from the decomposer inlet pipe 307104, allowing it to smoothly transition to other areas of the first chamber 303, thereby avoiding water erosion when the water enters the first chamber 303, and avoiding a reduction in the service life of the filter device 300. In this embodiment, a guide blade 305 is constructed on the outer peripheral wall of the filter cartridge 302. The guide blade 305 spirally extends from one end of the filter cartridge 302 to the other end along the axis of the filter cartridge 302, and the pitch of the guide blade 305 decreases along the flow direction of the water body. A discharge joint 309 is constructed at the lower part of the peripheral wall of the end of the filter cartridge 301 away from the catalytic decomposition device 200, and a first transmission wheel 311 is coaxially mounted on the filter discharge pipe 310, and the filter discharge pipe 310 is rotatably connected to the inlet end of the suction pump 400. The working principle and advantages of this embodiment are as follows: during the process of suction by the suction pump 400, the first transmission wheel 311 is driven to rotate, so that it drives the filter cartridge 302 to rotate through the filter discharge pipe 310; during the rotation of the filter cartridge 302, the piezoelectric photocatalyst located in the first chamber 303 is gradually moved toward the discharge joint 309 under the transportation of the guide blades 305; and because the pitch of the guide blades 305 decreases along the flow direction of the water body, the piezoelectric photocatalyst is gradually transported and squeezed by the guide blades 305, so that the piezoelectric photocatalyst is gradually dehydrated, and the dehydrated piezoelectric photocatalyst is discharged from the discharge joint 309.

[0023] As a preferred embodiment of the present invention, Figure 6-14As shown, the catalytic decomposition device 200 includes a decomposition tube 201, a delivery tube 229, an upper connection seat 209, a lower connection seat 219 and a plurality of reaction tubes 203, and the axes of the decomposition tube 201, the delivery tube 229, the upper connection seat 209 and the lower connection seat 219 coincide with each other. The delivery tube 229 is installed in the decomposition tube 201, the upper connection seat 209 and the lower connection seat 219 are arranged between the decomposition tube 201 and the delivery tube 229, and the upper connection seat 209 and the lower connection seat 219 are both rotatably connected to the decomposition tube 201 and the delivery tube 229, and the plurality of reaction tubes 203 are connected between the upper connection seat 209 and the lower connection seat 219, and the axes of the respective reaction tubes 203 are parallel to the axes of the decomposition tube 201, and the reaction tubes 203 are evenly arranged along the circumference of the decomposition tube 201, and a plurality of ultraviolet lamps are evenly mounted on the delivery tube 229 along its circumference, and the decomposition tube 201 and the delivery tube 229 are both structures made of transparent materials. In this embodiment, a primary reaction chamber 202 is formed in the decomposition cylinder 201, a secondary reaction chamber 205 is formed in the reaction tube 203, and a tertiary reaction chamber 240 is formed in the delivery tube 229. The upper end of the delivery tube 229 is threadedly connected with a sealing plug 228, and the sealing plug 228 seals the upper end of the delivery tube 229. The sewage enters the primary reaction chamber 202 of the decomposition cylinder 201, then passes through the secondary reaction chamber 205 of the reaction tube 203, and then enters the inlet end of the suction pump 400 through the tertiary reaction chamber 240 of the delivery tube 229. The working principle and advantage of this embodiment are: in this embodiment, by driving the upper connecting seat 209 to rotate, the upper connecting seat 209, the lower connecting seat 219 and all the reaction tubes 203 rotate along the axis of the delivery tube 229. The primary purified water and the piezoelectric photocatalyst enter the primary reaction chamber 202 from the upper part of the decomposition cylinder 201, and are gradually mixed fully under the stirring of the reaction tube 203, and the ultraviolet rays generated by the ultraviolet lamp are irradiated in the primary reaction chamber 202 and the second reaction chamber. In the process of the sewage passing through the primary reaction chamber 202, each reaction tube 203 and the secondary reaction chamber 205 in sequence, the piezoelectric photocatalyst is under the action of ultraviolet rays and combined with the flowing water flow, so that the piezoelectric photocatalyst enhances its catalytic decomposition of harmful substances, organic matter, etc. in the sewage through the piezoelectric effect. In addition, during the stirring and subsequent flow of the sewage, the sewage is continuously catalyzed in three stages, the first stage catalysis is completed in the primary reaction chamber 202, the second stage catalysis is completed in the secondary reaction chamber 205, and the third stage catalysis is completed in the tertiary reaction chamber 240, and then, while ensuring that the sewage and the piezoelectric photocatalyst are evenly mixed, the harmful substances, organic matter, etc. in the sewage are fully catalytically decomposed.

[0024] As a preferred embodiment of the present invention, Figure 8 , 11As shown in Figures 13, a spiral groove 204 is constructed on the peripheral wall of each reaction tube 203. The spiral groove 204 spirally extends along the axis of the reaction tube 203 to both ends of the reaction tube 203, and the spiral groove 204 is formed on the outer peripheral wall of the reaction tube 203 in the form of a spiral groove, and the spiral groove 204 is in the form of a spiral protrusion at the inner wall of the reaction tube 203. The working principle and advantage of this embodiment are: due to the setting of the spiral groove 204, the smoothness of the inner and outer surfaces of the reaction tube 203 is reduced in this embodiment. During the rotation of the axis of the reaction tube 203 and the conveying pipe 229, the reaction tube 203 disturbs the sewage and the piezoelectric photocatalyst in the primary reaction chamber 202 more fully, thereby promoting the mixing of the two, that is, the piezoelectric photocatalyst is homogenized in the sewage. During the stirring process, the sewage gradually enters the reaction tube 203 from the lower part thereof. Under the action of the spiral grooves 204, the sewage outside the reaction tube 203 enters the reaction tube 203 in the form of a vortex flow, and the sewage entering the reaction tube 203 moves upward in a vortex flow under the action of the spiral grooves 204 until it enters the delivery tube 229. The vortex flow of the sewage allows it to fully contact the piezoelectric photocatalyst, enhances the piezoelectric effect, and improves the efficiency of catalytic decomposition.

[0025] As a preferred embodiment of the present invention, Figure 6-13As shown, an upper connecting tube 207 and a lower connecting tube 208 are respectively constructed at the upper and lower ends of each reaction tube 203, a plurality of upper connecting holes 234 are uniformly opened on the upper connecting seat 209 along its circumference, and a plurality of lower connecting holes 235 are uniformly opened on the lower connecting seat 219 along its circumference, the upper connecting tube 207 of each reaction tube 203 extends out of the upper connecting seat 209 through the upper connecting hole 234, and the lower connecting tube 208 of each reaction tube 203 extends out of the lower connecting seat 219 through the lower connecting hole 235, and an upper connecting nut 226 and a lower connecting nut 227 are respectively threadedly connected to the upper connecting tube 207 and the lower connecting tube 208, and the upper connecting nut 226 and the lower connecting nut 227 are respectively screwed on the end surfaces of the upper connecting seat 209 and the lower connecting seat 219 that are away from each other, thereby achieving the purpose of connecting the upper connecting tube 207 and the lower connecting tube 208 to the upper connecting seat 209 and the lower connecting seat 219 respectively. In this embodiment, an upper adapter sleeve 231 is sleeved on the upper outer surface of the delivery pipe 229, and the upper adapter sleeve 231 is rotatably connected to the delivery pipe 229. A confluence cavity 232 is formed in the upper adapter sleeve 231, and a plurality of second water holes 233 are opened on the delivery pipe 229. These second water holes 233 are located in the confluence cavity 232, and the upper connecting pipe 207 and the delivery pipe 229 are connected through the confluence cavity 232. In this embodiment, a plurality of adapters 220 are configured on the annular liquid collecting pipe 217 along its circumferential intervals, and the corresponding adapters 220 of the lower connecting pipe 208 are connected, thereby achieving the purpose of connecting the lower connecting pipe 208 with the annular liquid collecting pipe 217. A liquid collecting joint 218 is configured on the annular liquid collecting pipe 217, and a liquid collecting control valve 216 is installed on the liquid collecting joint 218. A second transmission wheel 230 is coaxially mounted on the upper part of the upper adapter sleeve 231. In this embodiment, the second transmission wheel 230 is driven to rotate, so that the upper adapter sleeve 231 is driven to rotate. During the rotation process, the upper adapter sleeve 231 drives the upper connection seat 209, the lower connection seat 219 and all the reaction tubes 203 to rotate along the axis of the delivery tube 229 through the multiple upper connection tubes 207, thereby achieving the purpose of stirring and disturbing the primary reaction chamber 202. In this embodiment, multiple first water holes 206 are opened at the lower part of each reaction tube 203. Under the action of the suction water pump 400, the sewage in the primary reaction chamber 202 enters the reaction tube 203 through the first water holes 206, and then enters the delivery tube 229 through the upper connection tube 207 and the upper adapter sleeve 231, and then enters the filter device 300 from the lower end of the delivery tube 229. During the rotation process of the reaction tube 203, the decomposition cylinder 201 and the delivery tube 229 remain stationary.

[0026] As a preferred embodiment of the present invention, Figure 8 , 10As shown, a liquid inlet sleeve 210 is coaxially sleeved on the upper outer wall of the decomposition cylinder 201, an annular liquid chamber 211 is formed between the liquid inlet sleeve 210 and the decomposition cylinder 201, and a plurality of liquid inlet holes 225 are opened on the decomposition cylinder 201 and located at the position of the liquid inlet sleeve 210, and these liquid inlet holes 225 are connected to the annular liquid chamber 211 and the primary reaction chamber 202. In this embodiment, a liquid inlet pipe 212 is connected to the liquid inlet sleeve 210, and a catalyst inlet joint 214 is connected to the liquid inlet pipe 212, and a liquid inlet control valve 213 and a catalyst control valve 215 are respectively installed on the liquid inlet pipe 212 and the catalyst inlet joint 214. In this embodiment, the primary purified water and the piezoelectric photocatalyst homogeneous liquid enter the liquid inlet pipe 212 and the catalyst inlet joint 214 respectively, and then mix in the annular liquid cavity 211 of the liquid inlet sleeve 210, and then enter the upper part of the primary reaction chamber 202 evenly through each liquid inlet hole 225. In the process of downward movement in the primary reaction chamber 202, the primary purified water and the piezoelectric photocatalyst homogeneous liquid are mixed more fully.

[0027] As a preferred embodiment of the present invention, Figure 8 As shown, a lower adapter sleeve 221 is sleeved on the lower part of the delivery pipe 229, a plurality of silt guide holes 224 are provided on the delivery pipe 229 and in the lower adapter sleeve 221, a backwash joint 222 is connected to the lower adapter sleeve 221, and a backwash control valve 223 is installed on the backwash joint 222. The working principle and advantage of this embodiment are: when the sewage catalytic decomposition process is normally carried out, the backwash control valve 223 is closed, and the sewage after catalytic decomposition is discharged through the lower end of the delivery pipe 229. When it is necessary to backwash the delivery pipe 229, the reaction tube 203 and the decomposition tube 201, the liquid inlet control valve 213, the catalyst control valve 215 and the decomposition mass flow control valve 308 are closed, the liquid collecting control valve 216 and the backwashing control valve 223 are opened, and the cleaning water is injected into the delivery pipe 229 through the backwashing joint 222, and moves upward, and is evenly distributed to each reaction tube 203 by the upper adapter sleeve 231. After that, a part of the cleaning water is discharged from the liquid collecting joint 218 on the annular liquid collecting pipe 217, and the other part of the cleaning water enters the primary reaction chamber 202 through the first water passing hole 206, so that the liquid level in the primary reaction chamber 202 gradually rises; when the upper liquid level rises to not less than the liquid inlet hole 225, the liquid inlet control valve 213 is opened, and the cleaning water is discharged from the liquid inlet pipe 212, thereby achieving the purpose of cleaning the inside and outside of the delivery pipe 229, each reaction tube 203 and the inner wall of the decomposition tube 201.

[0028] As a preferred embodiment of the present invention, Figure 1 , 2As shown in Figures 14, when multiple catalytic decomposition devices 200 are used, a connecting elbow 236 is installed on each liquid collecting joint 218, and a rotating sleeve 237 is connected to one end of the connecting elbow 236 away from the liquid collecting joint 218. The rotating sleeve 237 is sleeved outside the delivery pipe 229, and the rotating sleeve 237 is rotatably connected to the delivery pipe 229. A transfer cover is rotatably connected to the upper end of the rotating sleeve 237, and the transfer cover is fixed on the delivery pipe 229. A sewage discharge joint 238 is constructed on the transfer cover. The sewage discharge joint 238 is connected to the inner cavity of the rotating sleeve 237, and a silt discharge control valve 239 is installed on the sewage discharge joint 238. In addition, the backwash joint 222 of each catalytic decomposition device 200 is connected to the backwash main The multi-stage filtration device 100 is connected to the sewage main pipe 600, and the sewage main pipe 600 is connected to the outlet end of the multi-stage filtration device 100. Each catalyst inlet joint 214 is connected to the catalyst main pipe 700, and the catalyst main pipe 700 is connected to the outlet end of the catalyst mixing kettle. The lower end of each delivery pipe 229 is connected to the drainage main pipe 900, and a drainage joint 901 is constructed on the drainage main pipe 900. The drainage joint 901 is connected to the decomposition substance inlet pipe 307104, thereby ensuring that these multi-stage filtration devices 100 simultaneously perform sewage purification or backwashing operations, thereby improving the efficiency of sewage treatment.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A photocatalytic decomposition system for pollutants based on piezoelectric effect enhancement, characterized by: It includes one or more catalytic decomposition devices whose inlet end is connected to the outlet end of the multi-stage filtering device, the outlet end of the catalytic decomposition device is connected to the inlet end of the filtering device, the inlet end of the suction water pump is connected to the outlet end of the filtering device, the inlet end of the catalyst mixing kettle is connected to the catalytic decomposition device, the slag outlet of the filtering device is connected to the slag collecting kettle, and the outlet end of the suction water pump is connected to the decomposition liquid collecting kettle.

2. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 1 is characterized in that: The multi-stage filtering device includes a plurality of filter screens installed at intervals along the length direction of the filter kettle. The filter screens divide the inner cavity of the filter kettle into a plurality of filter cavities. The mesh sizes of the filter screens increase along the flow direction of the sewage. The sewage enters through the inlet pipe of the filter kettle, and the filtered water enters the catalytic decomposition device through the outlet pipe of the filter kettle.

3. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 2 is characterized in that: A sedimentation bucket is constructed at the lower end of each filter chamber, and the lower end of each sedimentation bucket is connected to a sewage main pipe through a sewage branch pipe, and a sewage control valve is installed on the sewage main pipe.

4. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 1 is characterized in that: The filtering device includes a filter cartridge coaxially connected to the filter cartridge, and the ends of the filter cartridge and the filter cartridge that are away from each other are respectively constructed with a decomposition product inlet pipe and a filter outlet pipe, the decomposition product inlet pipe is connected to the outlet end of the catalytic decomposition device, and the filter outlet pipe is connected to the inlet end of the suction water pump, and a decomposition product flow control valve is installed on the decomposition product inlet pipe.

5. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 4 is characterized in that: A material guide blade is constructed on the outer peripheral wall of the filter cartridge, and the material guide blade spirally extends from one end of the filter cartridge to the other end along the axis of the filter cartridge, and the pitch of the material guide blade decreases along the flow direction of the water body. A discharge joint is constructed at the lower part of the peripheral wall of the end of the filter cartridge away from the catalytic decomposition device, and a first transmission wheel is coaxially mounted on the filter discharge pipe, and the filter discharge pipe is rotatably connected to the inlet end of the suction water pump.

6. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 1 is characterized in that: The catalytic decomposition device comprises a delivery pipe coaxially installed in the decomposition cylinder, an upper connecting seat and a lower connecting seat are arranged between the decomposition cylinder and the delivery pipe, the upper connecting seat and the lower connecting seat are both rotatably connected to the decomposition cylinder and the delivery pipe, a plurality of reaction tubes are connected between the upper connecting seat and the lower connecting seat, the reaction tubes are evenly arranged along the circumference of the decomposition cylinder, a primary reaction chamber is formed in the decomposition cylinder, sewage enters the primary reaction chamber, and after passing through the primary reaction chamber of the reaction tube, enters the inlet end of the suction water pump through the tertiary reaction chamber of the delivery pipe, and a plurality of ultraviolet lamp tubes are evenly mounted on the delivery pipe along its circumference.

7. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 6 is characterized by: A spiral groove is constructed on the peripheral wall of each reaction tube. The spiral groove spirally extends along the axis of the reaction tube to both ends of the reaction tube. The spiral groove is formed on the outer peripheral wall of the reaction tube in the form of a spiral groove, and the spiral groove is in the form of a spiral protrusion on the inner wall of the reaction tube.

8. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 6 is characterized by: An upper connecting pipe and a lower connecting pipe are respectively constructed at the upper and lower ends of each reaction tube, and the upper connecting pipe and the lower connecting pipe are respectively connected to the upper connecting seat and the lower connecting seat, and the upper connecting pipe is connected to the upper adapter sleeve, and the upper adapter sleeve is rotatably connected to the outside of the conveying pipe, and the lower connecting pipe is connected to the annular liquid collecting pipe, and a liquid collecting joint is constructed on the annular liquid collecting pipe, and a liquid collecting control valve is installed on the liquid collecting joint, and a second transmission wheel is coaxially assembled on the upper part of the upper adapter sleeve.

9. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 6, characterized in that: A liquid inlet sleeve is coaxially sleeved on the upper outer wall of the decomposition cylinder, a plurality of liquid inlet holes are opened on the decomposition cylinder and located at the position of the liquid inlet sleeve, the liquid inlet sleeve is connected with a liquid inlet pipe, the liquid inlet pipe is connected with a catalyst inlet joint, and a liquid inlet control valve and a catalyst control valve are respectively installed on the liquid inlet pipe and the catalyst inlet joint.

10. The photocatalytic decomposition system of pollutants based on piezoelectric effect enhancement according to claim 6, characterized in that: A lower adapter sleeve is sleeved on the lower part of the delivery pipe, a plurality of silt guide holes are opened on the delivery pipe and in the lower adapter sleeve, a backwash joint is connected to the lower adapter sleeve, and a backwash control valve is installed on the backwash joint.

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