Photocatalytic purification equipment

Abstract

The invention is applicable to the technical field of water purification, and provides photocatalytic purification equipment which comprises a mounting cylinder fixedly mounted in a mounting shell, the purification barrel is fixedly mounted in the mounting barrel, and a photocatalyst body for performing photocatalytic purification treatment on wastewater is fixedly mounted in the purification barrel; the plurality of light source lamps are fixedly mounted on the inner wall of the mounting cylinder and are used for illuminating the photocatalyst body; the filtering mechanism is arranged on the mounting shell and the purifying barrel and is used for filtering and removing impurities before the wastewater is subjected to photocatalytic purification; the impurity removal mechanism is assembled on the mounting shell and the purification barrel and is used for filtering and removing impurities from the wastewater subjected to photocatalytic purification. The photocatalytic purification equipment provided by the scheme can carry out photocatalytic purification treatment on wastewater, and can respectively carry out filtration and impurity removal treatment before and after photocatalytic purification on the wastewater, so that the wastewater treatment effect is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of water purification, and particularly relates to a photocatalytic purification device. Background Art

[0002] In daily life, a certain amount of wastewater is generated every day. In order to reduce pollution and enable the reasonable discharge of wastewater, it is necessary to purify the wastewater.

[0003] When purifying wastewater, a corresponding photocatalytic purification device will be used. The photocatalytic purification device uses photocatalyst to generate strong oxidation ability under the irradiation of light to decompose harmful substances such as organic pollutants, bacteria, and viruses in water. However, in the actual use process of some existing photocatalytic purification devices, before photocatalytically purifying the wastewater, they often cannot filter out some impurities in the wastewater well. After photocatalytically purifying the wastewater, there are more impurities in the wastewater, increasing the subsequent water treatment burden and also reducing the wastewater treatment effect. After retrieval, the patent document with the authorization announcement number: CN217202390U discloses a new type of photocatalytic water purification device, which also has such problems in the use process. Summary of the Invention

[0004] The present invention provides a photocatalytic purification device, aiming to solve the problem that the currently used photocatalytic purification device cannot handle impurities in wastewater well as proposed in the above background art.

[0005] To solve the above problems, the present invention is implemented as follows. A photocatalytic purification device includes: an installation cylinder fixedly installed in an installation shell; a purification barrel fixedly installed in the installation cylinder, and a photocatalyst body for photocatalytically purifying wastewater is fixedly installed in the purification barrel; a plurality of light source lamps fixedly installed on the inner wall of the installation cylinder for irradiating the photocatalyst body; a filtering mechanism provided on the installation shell and the purification barrel for filtering out impurities before photocatalytically purifying the wastewater; and an impurity removal mechanism assembled on the installation shell and the purification barrel for filtering out impurities from the wastewater after photocatalytic purification.

[0006] Preferably, the filtering mechanism includes: a first filtering box fixedly installed in the installation shell, a water inlet pipe fixedly installed on the first filtering box and the installation shell for discharging wastewater into the first filtering box, and a vertical pipe fixedly installed at the bottom of the first filtering box; a first filtering plate fixedly installed in the first filtering box for filtering out large particulate impurities in the wastewater; a impurity removal box fixedly installed in the installation shell, the impurity removal box is communicated with the vertical pipe, and the impurity removal box is communicated with the purification barrel, and a sand filter material for filtering some fine impurities in the wastewater is fixedly installed in the impurity removal box.

[0007] Preferably, the impurity removal mechanism includes: a second filtering box fixedly installed in the installation shell, a second filtering plate arranged in the second filtering box for filtering large particulate impurities in the water after photocatalytic purification, the second filtering box is communicated with the purification barrel, and an installation pipe is fixedly installed at the bottom of the second filtering box; a placement shell fixedly installed in the installation shell, the placement shell is communicated with the installation pipe, and a filter element for filtering fine impurities in the wastewater after photocatalytic purification is fixedly installed in the placement shell; a water outlet pipe fixedly installed at the bottom of the placement shell for discharging the purified water.

[0008] Preferably, two first water pumps are fixedly installed in the installation shell, first water pipes are fixedly installed on the water inlet ends of the two first water pumps, the two first water pipes are respectively communicated with the impurity removal box and the purification barrel, and second water pipes are fixedly installed on the water outlet ends of the two first water pumps, and the two second water pipes are respectively communicated with the purification barrel and the second filtering box.

[0009] Preferably, a cleaning mechanism for cleaning the impurities filtered on the first filtering plate and the second filtering plate is arranged on the first filtering box and the second filtering box. The cleaning mechanism includes: two cleaning pipes respectively sealed and rotatably installed on the first filtering box and the second filtering box, and both cleaning pipes are rotatably connected to the installation shell in a sealed manner; a plurality of spray heads fixedly installed on the cleaning pipes; two hoses respectively fixedly installed on the two cleaning pipes; a second water pump fixedly installed on an outer wall of one side of the installation shell, a cross pipe is fixedly installed on the water outlet end of the second water pump, and the cross pipe is communicated with the two hoses.

[0010] Preferably, an adjusting mechanism for adjusting the use angle of the spray heads is arranged on the installation shell and the two cleaning pipes. The adjusting mechanism includes: a servo motor fixedly installed on an outer wall of one side of the installation shell, an output shaft of the servo motor is fixedly connected to one end of one of the cleaning pipes; two synchronous wheels respectively fixedly sleeved on the two cleaning pipes, and a synchronous belt is sleeved on the two synchronous wheels.

[0011] Preferably, an excretion mechanism for excreting the wastewater used for cleaning the first filter plate and the second filter plate is provided on the first filter box and the second filter box. The excretion mechanism includes: a plurality of drain pipes respectively and fixedly installed on the first filter box and the second filter box; two confluence pipes fixedly installed on the inner wall of the installation shell, and the two confluence pipes are respectively communicated with the plurality of drain pipes; an excretion pipe fixedly installed on the inner wall of the installation shell, and the excretion pipe is communicated with the two confluence pipes.

[0012] Preferably, a ventilation mechanism for ventilating the inside of the installation shell is provided on the installation shell. The ventilation mechanism includes: a fan, a bent pipe and a ventilation pipe. The fan is fixedly installed on the top of the installation shell. The bent pipe is fixedly installed on the installation shell, and the bent pipe is communicated with the air outlet end of the fan. The ventilation pipe is fixedly installed on the inner wall of the top of the installation shell, and the ventilation pipe is communicated with the bent pipe, and a plurality of air outlet holes are formed in the ventilation pipe.

[0013] Preferably, a treatment box is provided at the air inlet end of the fan. A filter screen and a desiccant are arranged in the treatment box. The filter screen is used for filtering impurities in the air diverted by the fan, and the desiccant is used for drying and removing moisture in the air diverted by the fan.

[0014] Preferably, a plurality of the photocatalytic purification devices can form a photocatalytic device cluster in a parallel and / or series manner. For each two adjacent photocatalytic purification devices in the photocatalytic device cluster, one combination method is selected from parallel connection and / or series connection. According to the combination, the upper or lower port of each two adjacent photocatalytic purification devices is respectively set as a wastewater inlet and outlet. An inlet through pipe or an outlet through pipe is respectively arranged at the upper or lower part of the outer wall corresponding to the wastewater inlet and outlet. Circular pipe sleeves are installed at the inlet through pipe and / or the outlet through pipe of two adjacent photocatalytic purification devices. The two corresponding circular pipe sleeves are connected in series and / or combined in parallel by a silica gel soft pipe, so that the liquid in the previous photocatalytic purification device flows from the soft pipe to another photocatalytic purification device connected in series and / or in parallel with it. The photocatalytic device cluster is mainly divided into at least two clusters, namely a multi-functional version device cluster and a basic version device cluster.

[0015] Compared with the related art, the photocatalytic purification device provided by the present invention has the following beneficial effects:

[0016] Compared with the prior art, the photocatalytic purification device provided by the present solution can perform photocatalytic purification treatment on wastewater, and can respectively perform filtration and impurity removal treatment before and after the photocatalytic purification of the wastewater, effectively improving the effect of wastewater treatment. Description of the Drawings

[0017] Figure 1 It is a front view structural schematic diagram of a photocatalytic purification device provided by the present invention;

[0018] Figure 2 It is a front view sectional structural schematic diagram of the present invention;

[0019] Figure 3 It is a rear view structural schematic diagram of the present invention;

[0020] Figure 4 is Figure 2 an enlarged structural schematic diagram of part A shown in

[0021] Figure 5 is Figure 2 an enlarged structural schematic diagram of part B shown in

[0022] Figure 6 is Figure 3 an enlarged structural schematic diagram of part C shown in

[0023] Figure 7 is Figure 3 an enlarged structural schematic diagram of part D shown in

[0024] Figure 8 It is a three - dimensional structural schematic diagram of the first filter plate in the present invention.

[0025] Reference numerals: 1, installation shell; 2, installation cylinder; 3, purification barrel; 4, photocatalyst body; 5, light source lamp; 6, first filter box; 7, water inlet pipe; 8, first filter plate; 9, vertical pipe; 10, impurity removal box; 11, sand and gravel filter material; 12, second filter box; 13, second filter plate; 14, installation pipe; 15, placement shell; 16, filter element; 17, water outlet pipe; 18, first water pump; 19, first water pipe; 20, second water pipe; 21, cleaning pipe; 22, spray head; 23, hose; 24, second water pump; 25, horizontal pipe; 26, servo motor; 27, synchronous pulley; 28, synchronous belt; 29, drain pipe; 30, confluence pipe; 31, discharge pipe; 32, fan; 33, elbow pipe; 34, ventilation pipe. Detailed implementation manners

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order; the orientation or positional relationship indicated by the terms "inside", "outside", "left", "right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0027] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] An embodiment of the present invention provides a photocatalytic purification device, such as Figure 1-8 shown, the photocatalytic purification device includes: an installation cylinder 2 fixedly installed in an installation shell 1; a purification barrel 3 fixedly installed in the installation cylinder 2, and a photocatalyst body 4 for photocatalytic purification treatment of wastewater is fixedly installed in the purification barrel 3; a plurality of light source lamps 5 fixedly installed on the inner wall of the installation cylinder 2 for illuminating the photocatalyst body 4; a filtering mechanism provided on the installation shell 1 and the purification barrel 3 for filtering and removing impurities before photocatalytic purification of wastewater; and an impurity removal mechanism assembled on the installation shell 1 and the purification barrel 3 for filtering and removing impurities from the wastewater after photocatalytic purification.

[0029] In this embodiment, when purifying wastewater, first, some particulate impurities in the wastewater can be pretreated through a filtering mechanism, which can reduce the burden of subsequent treatment of the wastewater after photocatalytic purification, thereby improving the effect of wastewater treatment. The wastewater after filtering and impurity removal enters the purification tank 3. The light source lamp 5 is started through the controller. There is a controller on one side of the device, and the entire device can be controlled through the controller. The working principle of the controller is prior art and will not be elaborated here. The light source lamp 5 irradiates the photocatalyst body 4 in the purification tank 3. Under the irradiation of light, the photocatalyst body 4 generates a strong oxidation ability, decomposes harmful substances such as organic pollutants, bacteria, and viruses in the wastewater, and at the same time can generate electron-hole pairs, and then generate free radicals with strong oxidizing ability (such as hydroxyl radicals ·OH). These free radicals can attack the pollutant molecules in the wastewater and decompose them into harmless small molecule substances, thereby photocatalytically purifying the wastewater. The water after photocatalytic purification will produce some solid particles and impurities. The water after photocatalytic purification can be further purified through the impurity removal mechanism, effectively improving the effect of wastewater treatment. Through the entire device, the wastewater can be photocatalytically purified, and filtering and impurity removal treatments can be carried out before and after the photocatalytic purification of the wastewater respectively, effectively improving the effect of wastewater treatment.

[0030] In a further preferred embodiment of the present invention, the filtering mechanism includes: a first filtering box 6 fixedly installed in the installation shell 1, a water inlet pipe 7 for putting wastewater into the first filtering box 6 is fixedly installed on the first filtering box 6 and the installation shell 1, and a vertical pipe 9 is fixedly installed at the bottom of the first filtering box 6; a first filtering plate 8 fixedly installed in the first filtering box 6 for filtering and removing large particulate impurities in the wastewater; a impurity removal box 10 fixedly installed in the installation shell 1, the impurity removal box 10 is communicated with the vertical pipe 9, and the impurity removal box 10 is communicated with the purification tank 3, and a sand and gravel filter material 11 for filtering some fine impurities in the wastewater is fixedly installed in the impurity removal box 10.

[0031] In this embodiment, when purifying wastewater, the vertical pipe 9 is opened. First, the wastewater enters the first filtering box 6 through the water inlet pipe 7. The large particulate impurities in the wastewater can be filtered through the first filtering plate 8. The wastewater after impurity removal enters the impurity removal box 10 through the vertical pipe 9. The fine impurities in the wastewater can be further filtered through the sand and gravel filter material 11 in the impurity removal box 10. The wastewater after filtering and impurity removal then enters the purification tank 3 for photocatalytic purification, which can reduce the burden of subsequent treatment of the wastewater after photocatalytic purification, thereby improving the effect of wastewater treatment.

[0032] In a further preferred embodiment of the present invention, the impurity removal mechanism includes: a second filter box 12 fixedly installed in the installation shell 1, a second filter plate 13 for filtering large particulate impurities in the water after photocatalytic purification is arranged in the second filter box 12, the second filter box 12 is communicated with the purification barrel 3, and a mounting pipe 14 is fixedly installed at the bottom of the second filter box 12; a placement shell 15 fixedly installed in the installation shell 1, the placement shell 15 is communicated with the mounting pipe 14, and a filter element 16 for processing fine impurities in the wastewater after photocatalytic purification is fixedly installed in the placement shell 15; a water outlet pipe 17 fixedly installed at the bottom of the placement shell 15 for discharging the purified water.

[0033] In this embodiment, after the wastewater is photocatalytically purified, some solid particles and impurities will be generated in the water after photocatalytic purification. When using the impurity removal mechanism, the control valve on the mounting pipe 14 is opened, and the water after photocatalytic purification enters the second filter box 12. The large particulate impurities in the water after photocatalytic purification can be filtered by the second filter plate 13, and the fine impurities in the water after photocatalytic purification can be filtered again by the filter element 16, so as to improve the overall treatment effect of the wastewater.

[0034] In a further preferred embodiment of the present invention, two first water pumps 18 are fixedly installed in the installation shell 1. First water pipes 19 are fixedly installed at the water inlet ends of the two first water pumps 18. The two first water pipes 19 are respectively communicated with the impurity removal box 10 and the purification barrel 3, and second water pipes 20 are fixedly installed at the water outlet ends of the two first water pumps 18. The two second water pipes 20 are respectively communicated with the purification barrel 3 and the second filter box 12.

[0035] In this embodiment, during the process of photocatalytically purifying the wastewater, the two first water pumps 18 are started simultaneously. With the mutual cooperation of the first water pipes 19 and the second water pipes 20, it is convenient to pump the wastewater after impurity removal in the impurity removal box 10 into the purification barrel 3 for photocatalytic purification, and at the same time, it is convenient to pump the water after photocatalytic purification in the purification barrel 3 into the second filter box 12 for re-filtering and impurity removal, so as to facilitate the overall purification treatment of the wastewater.

[0036] In a further preferred embodiment of the present invention, a cleaning mechanism for cleaning the impurities filtered on the first filter plate 8 and the second filter plate 13 is provided on the first filter box 6 and the second filter box 12. The cleaning mechanism includes: two cleaning pipes 21 respectively and sealingly rotatably installed on the first filter box 6 and the second filter box 12, and both of the two cleaning pipes 21 are sealingly rotatably connected to the installation shell 1; a plurality of spray heads 22 fixedly installed on the cleaning pipes 21; two hoses 23 respectively fixedly installed on the two cleaning pipes 21; a second water pump 24 fixedly installed on the outer wall of one side of the installation shell 1, and a cross pipe 25 is fixedly installed on the water outlet end of the second water pump 24, and the cross pipe 25 is communicated with the two hoses 23.

[0037] In this embodiment, after the first filter plate 8 and the second filter plate 13 are used for a long time and need to be cleaned, first close the control valves on the vertical pipe 9 and the installation pipe 14, connect the water inlet end of the second water pump 24 to the corresponding water source pipeline, start the second water pump 24, water enters the two hoses 23 through the cross pipe 25, and then enters the two cleaning pipes 21 respectively, and is sprayed onto the first filter plate 8 and the second filter plate 13 through the spray heads 22 respectively, so that the first filter plate 8 and the second filter plate 13 can be cleaned, avoiding blockage of the first filter plate 8 and the second filter plate 13, improving the effect of filtering and removing impurities in the sewage, and further improving the effect of sewage treatment.

[0038] In a further preferred embodiment of the present invention, an adjusting mechanism for adjusting the use angle of the spray heads 22 is provided on the installation shell 1 and the two cleaning pipes 21. The adjusting mechanism includes: a servo motor 26 fixedly installed on the outer wall of one side of the installation shell 1, and the output shaft of the servo motor 26 is fixedly connected to one end of one of the cleaning pipes 21; two synchronous pulleys 27 respectively fixedly sleeved on the two cleaning pipes 21, and a synchronous belt 28 is sleeved on the two synchronous pulleys 27.

[0039] In this embodiment, when cleaning the first filter plate 8 and the second filter plate 13, start the servo motor 26 to rotate forward and backward by a certain angle through the controller at the same time. Under the interaction of the synchronous pulleys 27 and the synchronous belt 28, the plurality of spray heads 22 on the two cleaning pipes 21 can be driven to adjust the spraying angle, so that the first filter plate 8 and the second filter plate 13 can be comprehensively cleaned, improving the cleaning effect of the first filter plate 8 and the second filter plate 13, avoiding blockage of the first filter plate 8 and the second filter plate 13, improving the effect of filtering and removing impurities in the sewage, and further improving the effect of sewage treatment.

[0040] In a further preferred embodiment of the present invention, an excretion mechanism for excreting the wastewater used for cleaning the first filter plate 8 and the second filter plate 13 is provided on the first filter box 6 and the second filter box 12. The excretion mechanism includes: a plurality of drain pipes 29 respectively fixedly installed on the first filter box 6 and the second filter box 12; two confluence pipes 30 fixedly installed on the inner wall of the installation shell 1, and the two confluence pipes 30 are respectively communicated with the plurality of drain pipes 29; an excretion pipe 31 fixedly installed on the inner wall of the installation shell 1, and the excretion pipe 31 is communicated with the two confluence pipes 30.

[0041] In this embodiment, when cleaning the first filter plate 8 and the second filter plate 13, the control valves on the two confluence pipes 30 need to be opened simultaneously, and the control valves on the vertical pipe 9 and the installation pipe 14 need to be closed. The wastewater for cleaning the first filter plate 8 and the second filter plate 13 is discharged from the first filter box 6 and the second filter box 12 through the drain pipes 29, and respectively enters the two confluence pipes 30, and then is discharged uniformly through the excretion pipe 31. The excretion pipe 31 is connected to the corresponding pipeline.

[0042] In a further preferred embodiment of the present invention, a ventilation mechanism for ventilating the inside of the installation shell 1 is provided on the installation shell 1. The ventilation mechanism includes: a fan 32, an elbow pipe 33 and a ventilation pipe 34. The fan 32 is fixedly installed on the top of the installation shell 1, the elbow pipe 33 is fixedly installed on the installation shell 1, the elbow pipe 33 is communicated with the air outlet end of the fan 32, the ventilation pipe 34 is fixedly installed on the inner wall of the top of the installation shell 1, the ventilation pipe 34 is communicated with the elbow pipe 33, and a plurality of air outlet openings are provided on the ventilation pipe 34.

[0043] In this embodiment, during the overall use process, when it is necessary to accelerate the ventilation inside the installation shell 1, the fan 32 is started through the controller. The air enters the ventilation pipe 34 through the elbow pipe 33 and is blown into the installation shell 1 through the air outlet openings on the ventilation pipe 34, so as to ventilate and exchange the air inside the installation shell 1. A ventilation opening is provided on the installation shell 1.

[0044] In a further preferred embodiment of the present invention, a processing box is provided at the air inlet end of the fan 32. A filter screen and a desiccant are provided inside the processing box. The filter screen is used to filter impurities in the air diverted by the fan 32, and the desiccant is used to dry and remove moisture in the air diverted by the fan 32.

[0045] In this embodiment, when using the fan 32, the filter screen is used to filter impurities in the air diverted by the fan 32, and the desiccant is used to dry and remove moisture in the air diverted by the fan 32.

[0046] In a further preferred embodiment of the present invention, a plurality of photocatalytic purification devices can form a photocatalytic device cluster in a parallel and / or series manner. The photocatalytic device cluster enhances performance in a parallel manner and increases functions in a series extension manner. For each two adjacent photocatalytic purification devices in the photocatalytic device cluster, one combination method is selected from parallel and / or series. According to the combination, the upper or lower port of each two adjacent photocatalytic purification devices is respectively set as the wastewater inlet and outlet. The upper or lower part of the outer wall corresponding to the wastewater inlet and outlet is respectively provided with an inlet pipe or an outlet pipe. Circular pipe sleeves are installed at the inlet pipe and / or outlet pipe of two adjacent photocatalytic purification devices. The two corresponding circular pipe sleeves are connected in series and / or combined in parallel by a silica gel soft pipe, so that the liquid in the previous photocatalytic purification device flows from the soft pipe to another photocatalytic purification device connected in series and / or parallel with it. The photocatalytic device cluster is mainly divided into at least two types, namely, a multi-functional version device cluster and a basic version device cluster.

[0047] In summary, compared with the related art, through the whole device, the wastewater can be subjected to photocatalytic purification treatment, and filtering and impurity removal treatments can be respectively carried out before and after the photocatalytic purification of the wastewater, effectively improving the effect of wastewater treatment.

[0048] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions or other adjustments to the features in the embodiments of the present invention according to the situation without creative work, so as to obtain different technical solutions that essentially do not deviate from the concept of the present invention. These technical solutions also belong to the scope of protection of the present invention.

Claims

1. A photocatalytic purification device, characterized in that, Including: An installation cylinder fixedly installed inside the installation shell; A purification barrel fixedly installed inside the installation cylinder, and a photocatalyst body for photocatalytic purification treatment of wastewater is fixedly installed inside the purification barrel; A plurality of light source lamps fixedly installed on the inner wall of the installation cylinder for illuminating the photocatalyst body; A filtering mechanism provided on the installation shell and the purification barrel for filtering and removing impurities before photocatalytic purification of wastewater; An impurity removing mechanism assembled on the installation shell and the purification barrel for filtering and removing impurities from the wastewater after photocatalytic purification.

2. The photocatalytic purification device according to claim 1, characterized in that, The filtering mechanism includes: A first filtering box fixedly installed inside the installation shell, a water inlet pipe for putting wastewater into the first filtering box is fixedly installed on the first filtering box and the installation shell, and a vertical pipe is fixedly installed at the bottom of the first filtering box; A first filtering plate fixedly installed inside the first filtering box for filtering and removing large particle impurities in the wastewater; An impurity removing box fixedly installed inside the installation shell, the impurity removing box is communicated with the vertical pipe, and the impurity removing box is communicated with the purification barrel, and a sand filter material for filtering some fine impurities in the wastewater is fixedly installed inside the impurity removing box.

3. The photocatalytic purification device according to claim 2, characterized in that, The impurity removing mechanism includes: A second filtering box fixedly installed inside the installation shell, a second filtering plate for filtering large particle impurities in the water after photocatalytic purification is arranged inside the second filtering box, the second filtering box is communicated with the purification barrel, and an installation pipe is fixedly installed at the bottom of the second filtering box; A placement shell fixedly installed inside the installation shell, the placement shell is communicated with the installation pipe, and a filter element for filtering fine impurities in the wastewater after photocatalytic purification is fixedly installed inside the placement shell; An outlet pipe fixedly installed at the bottom of the placement shell for discharging the purified water.

4. The photocatalytic purification device according to claim 3, characterized in that, Two first water pumps are fixedly installed inside the installation shell, first water pipes are fixedly installed on the water inlet ends of the two first water pumps, the two first water pipes are respectively communicated with the impurity removing box and the purification barrel, and second water pipes are fixedly installed on the water outlet ends of the two first water pumps, the two second water pipes are respectively communicated with the purification barrel and the second filtering box.

5. The photocatalytic purification device according to claim 3, characterized in that, A cleaning mechanism for cleaning the impurities filtered on the first filtering plate and the second filtering plate is provided on the first filtering box and the second filtering box, and the cleaning mechanism includes: Two cleaning pipes respectively sealed and rotatably installed on the first filtering box and the second filtering box, and the two cleaning pipes are both sealed and rotatably connected with the installation shell; A plurality of spray heads fixedly installed on the cleaning pipe; Two flexible pipes respectively fixedly installed on the two cleaning pipes; A second water pump fixedly installed on the outer wall of one side of the installation shell, a horizontal pipe is fixedly installed on the water outlet end of the second water pump, and the horizontal pipe is communicated with the two flexible pipes.

6. The photocatalytic purification device according to claim 5, wherein, An adjusting mechanism for adjusting the use angle of the spray heads is provided on the installation shell and the two cleaning pipes, and the adjusting mechanism includes: A servo motor fixedly installed on the outer wall of one side of the installation shell, and the output shaft of the servo motor is fixedly connected to one end of one of the cleaning pipes; Two synchronous wheels fixedly sleeved on the two cleaning pipes respectively, and a synchronous belt is sleeved on the two synchronous wheels.

7. The photocatalytic purification device according to claim 3, wherein, An excretion mechanism for excreting the wastewater used for cleaning the first filter plate and the second filter plate is arranged on the first filter box and the second filter box. The excretion mechanism includes: A plurality of drain pipes fixedly installed on the first filter box and the second filter box respectively; Two confluence pipes fixedly installed on the inner wall of the installation shell, and the two confluence pipes are respectively communicated with the plurality of drain pipes; An excretion pipe fixedly installed on the inner wall of the installation shell, and the excretion pipe is communicated with the two confluence pipes.

8. The photocatalytic purification device according to claim 1, wherein, A ventilation mechanism for ventilating the inside of the installation shell is arranged on the installation shell. The ventilation mechanism includes: a fan, a bent pipe and a ventilation pipe. The fan is fixedly installed on the top of the installation shell, the bent pipe is fixedly installed on the installation shell, the bent pipe is communicated with the air outlet end of the fan, the ventilation pipe is fixedly installed on the top inner wall of the installation shell, the ventilation pipe is communicated with the bent pipe, and a plurality of air outlet openings are formed in the ventilation pipe.

9. The photocatalytic purification device according to claim 8, characterized in that, A processing box is arranged on the air inlet end of the fan. A filter screen and a desiccant are arranged in the processing box. The filter screen is used for filtering impurities in the air drawn by the fan, and the desiccant is used for drying and removing moisture in the air drawn by the fan.

10. The photocatalytic purification device according to claim 1, characterized in that, A plurality of the photocatalytic purification devices can form a photocatalytic device cluster in a parallel and / or series manner. For each two adjacent photocatalytic purification devices in the photocatalytic device cluster, a combination method of parallel and / or series is selected. According to the combination, the upper or lower port of each two adjacent photocatalytic purification devices is respectively set as a wastewater inlet and outlet. An inlet through pipe or an outlet through pipe is respectively arranged at the upper or lower part of the outer wall corresponding to the wastewater inlet and outlet. Circular pipe sleeves are installed at the inlet through pipe and / or the outlet through pipe of two adjacent photocatalytic purification devices. The two corresponding circular pipe sleeves are connected in series and / or combined in parallel by a silica gel soft pipe, so that the liquid in the previous photocatalytic purification device flows to another photocatalytic purification device connected in series and / or parallel with it through the soft pipe. The photocatalytic device cluster is mainly divided into at least two clusters, namely a multi-functional version device cluster and a basic version device cluster.

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