A waste liquid photocatalytic treatment device

Abstract

The application discloses a kind of waste liquid photocatalytic treatment device, and the present application solves the problems of single function, low utilization efficiency of photocatalyst of existing photocatalytic wastewater treatment device.The waste liquid photocatalytic treatment device of the present application includes photocatalytic reaction device, reflection component, filtration system, ultraviolet activation device and thermal activation device, the cylinder reactor in photocatalytic reaction device is installed at the top of four electric telescopic rods, a plurality of reflection components are arranged in the circumferential direction of the inner wall of cylinder reactor, the reflection component includes a reflective panel and a xenon lamp, the drum vacuum filter in filtration system is installed in liquid tank, the conveying pipe is located in the upper part of liquid tank, the photocatalyst is scraped off by scraper during the rotation of drum vacuum filter, and the photocatalyst is sequentially conveyed to ultraviolet activation device and thermal activation device by conveyor belt.The present application uses photocatalyst double activation system, the degree of photocatalytic activation is improved by the joint action of ultraviolet activation and thermal activation system, and the utilization efficiency of photocatalyst is increased.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of waste liquid treatment, and particularly relates to a waste liquid photocatalytic treatment device. BACKGROUND

[0002] With the continuous development of the economic society, people's demand for electric power, medicine and chemical products is higher and higher. With the stable and efficient supply of electric power and the emergence of chemical products, the waste liquid generated by the electric power, medicine and chemical industry is more and more. Therefore, it is urgent to choose a low-carbon, environmentally friendly and green sustainable waste liquid treatment method.

[0003] As a technology for utilizing sunlight for catalysis, photocatalysis has the advantages of low energy consumption, good effect, green and low carbon, etc. However, the photocatalytic treatment device at the present stage has single function, cannot maximize the utilization of solar energy, cannot realize integrated treatment and double-function full-automatic activation, and the utilization efficiency of photocatalyst is low, which greatly reduces the photocatalytic performance. SUMMARY

[0004] The purpose of the present application is to solve the problems of single function and low utilization efficiency of photocatalyst of the existing photocatalytic wastewater treatment device, and to provide a novel waste liquid photocatalytic treatment device.

[0005] The waste liquid photocatalytic treatment device comprises a photocatalytic reaction device, a light reflection assembly, a filtration system, an ultraviolet activation device and a thermal activation device. The photocatalytic reaction device comprises a base, an input pipe, a cylindrical reactor, an output pipe and an electric telescopic rod. The cylindrical reactor is made of a light-transmitting material. Four electric telescopic rods are vertically arranged on the base. The cylindrical reactor is installed on the top of the four electric telescopic rods. A plurality of light reflection assemblies are arranged on the circumferential direction of the inner wall of the cylindrical reactor. A water inlet at the top of the cylindrical reactor is connected with the input pipe. Waste liquid and photocatalyst enter the cylindrical reactor through the input pipe. A water outlet at the bottom of the cylindrical reactor is connected with the output pipe.

[0006] The light reflection assembly comprises a light reflection panel and a xenon lamp. The xenon lamp is arranged on the light reflection panel and is arranged in a quartz glass cover.

[0007] The filtration system comprises a liquid tank, a conveying pipe, a rotary drum vacuum filter, a scraper and a conveyor belt. The rotary drum vacuum filter is installed in the liquid tank. The conveying pipe is located at the upper part of the liquid tank. The rotary drum vacuum filter scrapes off the photocatalyst by the scraper during rotation. The photocatalyst falls on the conveyor belt. The output pipe of the cylindrical reactor is connected with the conveying pipe of the filtration system.

[0008] The ultraviolet activation device comprises a reaction kettle, ultraviolet lamps and a liquid discharge pipe, photocatalysts are conveyed into the reaction kettle by a conveying belt, the photocatalysts in the reaction kettle are mixed with deionized water, a plurality of ultraviolet lamps are arranged on the outer wall of the reaction kettle, and the bottom of the reaction kettle is provided with the liquid discharge pipe;

[0009] The thermal activation device comprises a feeding opening, a fluidization cavity, a reflux cavity and a heater, the fluidization cavity and the reflux cavity are arranged on the left and right sides of the thermal activation device, the bottom of the fluidization cavity is a hot air blowing port, the feeding opening is located on the side of the lower part of the fluidization cavity, the top of the fluidization cavity is communicated with the top of the reflux cavity, the lower part of the reflux cavity is communicated with the reflux port of the fluidization cavity, and the reflux port is located on the upper part of the hot air blowing port; the liquid discharge pipe of the ultraviolet activation device is connected with the feeding opening through a connecting pipe, and a filter is arranged on the connecting pipe.

[0010] The waste liquid photocatalytic treatment device mainly comprises a photocatalytic reaction device, a filtering system, an ultraviolet activation device and a thermal activation device, the reflecting component is used for improving the refraction of light in the reaction area and improving the probability of generating photo-generated electrons and photo-generated holes of the photocatalyst, so that the photocatalytic efficiency is improved.

[0011] The ultraviolet light activation and thermal activation are combined, the ultraviolet light activation is high-intensity irradiation of waste liquid components in the internal gap of the catalyst in deionized water by ultraviolet light, and waste liquid components difficult to be photocatalytically degraded are removed; the thermal activation is carried out by using a fluidized bed, the catalyst is swept by high-temperature gas flow, and the thermal activation has the dual functions of drying and activation, and the photocatalyst after activation is separated from the outlet of the fluidized bed.

[0012] The tinned reflecting component is used to improve the light utilization efficiency, the reflecting device is combined with the filtering device and the activation device, the whole process from the initial use to the recycling use of the photocatalyst is completed, and the use efficiency of the photocatalyst is improved. The photocatalyst double-activation system is used for the first time, the photocatalytic activation degree is improved through the cooperation of the ultraviolet activation and the thermal activation system, different photocatalyst activation modes can be selected according to different properties of the photocatalyst, and the utilization efficiency of the photocatalyst is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the photocatalytic reaction device of the present application;

[0014] Figure 2 It is a top view structure schematic view of the photocatalytic reaction device;

[0015] Figure 3 It is a structure schematic view of the reflecting component;

[0016] Figure 4 It is a structure schematic view of the filtering system;

[0017] Figure 5Structure diagram of the ultraviolet activation device;

[0018] Figure 6 Structure diagram of the heat activation device. DETAILED DESCRIPTION

[0019] Specific embodiment one: the waste liquid photocatalytic treatment device includes a photocatalytic reaction device 1, a reflection component 2, a filtration system 3, an ultraviolet activation device 4 and a heat activation device 5. The photocatalytic reaction device 1 includes a base 1-1, an input pipe 1-2, a cylindrical reactor 1-3, an output pipe 1-4 and an electric telescopic rod 1-7. The cylindrical reactor 1-3 is made of a light-transmitting material. Four electric telescopic rods 1-7 are vertically arranged on the base 1-1. The cylindrical reactor 1-3 is installed on the top of the four electric telescopic rods 1-7. A plurality of reflection components 2 are arranged on the circumferential direction of the inner wall of the cylindrical reactor 1-3. A water inlet at the top of the cylindrical reactor 1-3 is connected with the input pipe 1-2. Waste liquid and photocatalyst enter the cylindrical reactor 1-3 through the input pipe 1-2. A water outlet at the bottom of the cylindrical reactor 1-3 is connected with the output pipe 1-4.

[0020] The reflection component 2 includes a reflection panel 2-1 and a xenon lamp 2-2. The xenon lamp 2-2 is arranged on the reflection panel 2-1 and is arranged in a quartz glass cover.

[0021] The filtration system 3 includes a liquid tank 3-1, a conveying pipe 3-2, a drum vacuum filter 3-3, a scraper 3-4 and a conveying belt 3-5. The drum vacuum filter 3-3 is installed in the liquid tank 3-1. The conveying pipe 3-2 is arranged at the upper part of the liquid tank 3-1. The photocatalyst is scraped off by the scraper 3-4 during the rotation of the drum vacuum filter 3-3 and falls on the conveying belt 3-5. The output pipe 1-4 of the cylindrical reactor 1-3 is connected with the conveying pipe 3-2 of the filtration system 3.

[0022] The ultraviolet activation device 4 includes a reaction kettle 4-1, an ultraviolet lamp 4-2 and a liquid discharge pipe 4-4. The photocatalyst is conveyed to the reaction kettle 4-1 through the conveying belt 3-5. The photocatalyst in the reaction kettle 4-1 is mixed with deionized water. A plurality of ultraviolet lamps 4-2 are arranged on the outer wall of the reaction kettle 4-1. The bottom of the reaction kettle 4-1 is provided with the liquid discharge pipe 4-4.

[0023] The thermal activation device 5 comprises a feeding port 5-1, a fluidization cavity 5-2, a reflux cavity 5-3, and a heater 5-4. The fluidization cavity 5-2 and the reflux cavity 5-3 are separately arranged on the left and right sides of the thermal activation device 5. The bottom of the fluidization cavity 5-2 is a hot air injection port. The feeding port 5-1 is located on the side of the lower part of the fluidization cavity 5-2. The top of the fluidization cavity 5-2 is communicated with the top of the reflux cavity 5-3. The lower part of the reflux cavity 5-3 is communicated with the reflux port of the fluidization cavity 5-2. The reflux port is located on the upper part of the hot air injection port. The liquid discharge pipe 4-4 of the ultraviolet activation device 4 is connected with the feeding port 5-1 through a connecting pipe. A filter is arranged on the connecting pipe.

[0024] Specific embodiment two: The bottom of the cylindrical reactor 1-3 is in the form of an inverted cone.

[0025] Specific embodiment three: The photocatalytic reaction device 1 further comprises a reflux pipe 1-5. One end of the reflux pipe 1-5 is communicated with the input pipe 1-2. The other end of the reflux pipe 1-5 is communicated with the output pipe 1-4.

[0026] In the embodiment, a solid-phase separator is arranged at the intersection of the reflux pipe 1-5 and the output pipe 1-4, so as to avoid the photocatalytic material from entering the reflux pipe 1-5.

[0027] Specific embodiment four: At least one stirrer 1-6 is arranged in the cylindrical reactor 1-3.

[0028] Specific embodiment five: A sunlight tracker 1-8 is arranged at the top center of the cylindrical reactor 1-3.

[0029] In the embodiment, the sunlight tracker 1-8 determines the optimal sunlight irradiation angle. The extension length of the electric telescopic rod 1-7 is adjusted, so that the cylindrical reactor 1-3 is inclined to the sunlight, so as to better absorb the sunlight.

[0030] Specific embodiment six: A cooling device is arranged in the light reflection assembly 2.

[0031] In the embodiment, the cooling device is used to cool the xenon lamp.

[0032] Specific embodiment seven: The photocatalyst and the deionized water in the reaction kettle 4-1 are mixed by the electric stirrer 4-3 in the kettle.

[0033] Specific embodiment eight: A valve is arranged on the liquid discharge pipe 4-4.

[0034] Specific embodiment nine: the difference between this embodiment and one of the specific embodiments one to eight is that the hot air temperature in the fluidization cavity 5-2 is controlled to be 50-250℃.

[0035] Specific embodiment ten: the difference between this embodiment and one of the specific embodiments one to nine is that a sampling port 5-5 is opened at the top of the reflux cavity 5-3.

[0036] Specific embodiment eleven: the difference between this embodiment and one of the specific embodiments one to ten is that a wind distribution plate 5-6 is arranged at the bottom of the reflux cavity 5-3.

[0037] Embodiment: the waste liquid photocatalytic treatment device includes a photocatalytic reaction device 1, a reflection component 2, a filtration system 3, an ultraviolet activation device 4 and a thermal activation device 5, wherein the photocatalytic reaction device 1 includes a base 1-1, an input pipe 1-2, a cylindrical reactor 1-3, an output pipe 1-4 and an electric telescopic rod 1-7, the cylindrical reactor 1-3 is made of quartz glass, four electric telescopic rods 1-7 are vertically arranged on the base 1-1, the cylindrical reactor 1-3 is installed on the top of the four electric telescopic rods 1-7, a plurality of reflection components 2 are uniformly arranged on the inner wall circumference of the cylindrical reactor 1-3, a reflection panel is arranged at the bottom of the cylindrical reactor 1-3, a water inlet at the top of the cylindrical reactor 1-3 is connected with the input pipe 1-2, waste liquid and photocatalyst enter the cylindrical reactor 1-3 through the input pipe 1-2, and a water outlet at the bottom of the cylindrical reactor 1-3 is connected with the output pipe 1-4.

[0038] The reflection component 2 includes a reflection panel 2-1 and a xenon lamp 2-2, the reflection component 2 is a sealed waterproof structure, the xenon lamp 2-2 is arranged on the reflection panel 2-1, the xenon lamp 2-2 is arranged in a quartz glass cover, a cooling device is arranged in the reflection component 2 to cool the xenon lamp 2-2, a fine adjustment motor 2-3 is arranged at the bottom of the reflection component 2, the fine adjustment motor 2-3 is located outside the photocatalytic reaction device 1, the reflection component 2 is driven to rotate by the fine adjustment motor 2-3 to better reflect sunlight, and the reflection component 2 can also be provided with a cleaning device.

[0039] The filtration system 3 includes a liquid tank 3-1, a conveying pipe 3-2, a rotary drum vacuum filter 3-3, a scraper 3-4 and a conveying belt 3-5, the rotary drum vacuum filter 3-3 is installed in the liquid tank 3-1, the conveying pipe 3-2 is located at the upper part of the liquid tank 3-1, the photocatalyst is scraped off by the scraper 3-4 in the process of rotation of the rotary drum vacuum filter 3-3, and the photocatalyst falls on the conveying belt 3-5; the output pipe 1-4 of the cylindrical reactor 1-3 is connected with the conveying pipe 3-2 of the filtration system 3.

[0040] The ultraviolet activation device 4 comprises a reaction kettle 4-1, ultraviolet lamps 4-2 and a liquid discharge pipe 4-4, the photocatalyst is conveyed to the reaction kettle 4-1 through the conveying belt 3-5, the photocatalyst in the reaction kettle 4-1 is mixed with deionized water, a plurality of ultraviolet lamps 4-2 are arranged on the outer wall of the reaction kettle 4-1, the ultraviolet lamps 4-2 are arranged in a quartz glass cover, and the bottom of the reaction kettle 4-1 is provided with the liquid discharge pipe 4-4;

[0041] The thermal activation device 5 comprises a feeding port 5-1, a fluidization cavity 5-2, a reflux cavity 5-3 and a heater 5-4, the fluidization cavity 5-2 and the reflux cavity 5-3 are separately arranged on the left and right sides of the thermal activation device 5, the bottom of the fluidization cavity 5-2 is a hot air blowing port, the feeding port 5-1 is located on the side of the lower part of the fluidization cavity 5-2, the top of the fluidization cavity 5-2 is communicated with the top of the reflux cavity 5-3, the lower part of the reflux cavity 5-3 is communicated with the reflux port of the fluidization cavity 5-2, and the reflux port is located on the upper part of the hot air blowing port; the liquid discharge pipe 4-4 of the ultraviolet activation device 4 is connected with the feeding port 5-1 through a connecting pipe, and a filter is arranged on the connecting pipe, and the filter is used for separating the photocatalyst from water.

[0042] The solid photocatalyst in the embodiment can be a solid composite photocatalyst such as a polyoxometalate, a p-n junction, a perovskite and a carbon-based material.

[0043] The solar light tracker 1-8 is arranged at the top center of the cylindrical reactor 1-3. The telescopic length of the electric telescopic rod 1-7 is adjusted by the controller, so that the cylindrical reactor 1-3 is inclined to the sunlight, thereby better absorbing the sunlight.

[0044] The photocatalyst treatment device for waste liquid in the embodiment comprises a water inlet, a photocatalyst inlet, a water outlet, a sampling port, a photocatalyst outlet, a base, a mechanical adjusting device, a rotating mechanical shaft, a stirring paddle, a tinned reflective device (mirror surface) and the like.

[0045] At the beginning of starting the device, the solar light tracker (solar light tracking sensing device) is started first, the direction of the sunlight is judged, a signal is transmitted to the controller installed on the base, the cylindrical reactor is adjusted to a suitable position through four electric telescopic rods, and the cylindrical reactor can be kept at the best angle to participate in the reaction. If the solar light tracker does not detect the sunlight, the xenon lamp of the reflective assembly is turned on through the controller. After the sunlight positioning is completed, the waste liquid enters the reaction zone from the water inlet pipe, is mixed with the photocatalyst entering the photocatalyst inlet, and the stirring paddle is started at the same time. The photocatalyst and the waste liquid are fully mixed through the stirring paddle, and after being uniformly mixed, the electric pump of the liquid circulating device is started, the photocatalyst deposited on the edge is sucked into the circulating device pipe, a pushing force is provided through the pump, and the photocatalyst is sprayed from the outlet pipe of the liquid circulating device, so that the photocatalyst participates in the reaction again, so as to avoid the situation that the reaction is insufficient. Before the reaction is completed, part of the photocatalyst entering the water outlet pipe will be pushed back to the reaction zone by the small electric pump, so as to prevent the photocatalyst from escaping and affecting the reaction rate.

[0046] During the reaction, a sampling device can be opened for sampling. A small filter device is arranged at the inlet end of the sampling device to filter out the photocatalyst, and the liquid sampling port is connected to a chromatograph, a mass spectrometer, an infrared spectrometer, and an ultraviolet spectrometer, etc. Different detection devices are selected according to the characteristics of the reacted solution to detect the reacted solution, so as to facilitate the setting of the optimal reaction time. During the reaction, the catalyst in the reaction can also be separated out through a solid sampling device, and different detection methods are selected for the photocatalyst according to different photocatalysts to detect the photocatalyst, which is used to judge the activity of the photocatalyst in the reaction. If the activity of the photocatalyst in the reaction decreases, the photocatalytic activation process is started in time through the controller.

[0047] The tinned reflective light device (mirror surface) system in the reaction zone operates independently. At the beginning of system startup, the reflective component starts to fine-tune according to the output signal of the sunlight tracking detection device, and the mirror surface angle is adjusted through a small driving motor to further improve the sunlight reflection efficiency and the photocatalytic efficiency. After the initial adjustment, as the sun rotates, the sunlight angle changes constantly, and the reaction zone mechanical adjustment device and the tinned reflective light device (mirror surface) are constantly corrected through the continuously changing sunlight tracking sensing device signal to ensure that the reaction is carried out in the best state.

[0048] The xenon lamp cooling device cooling water outlet should be equipped with a temperature sensing device to detect the xenon lamp outlet water temperature. When the outlet water temperature is too high, the cooling water pump will increase the output to increase the water inflow and increase the cooling capacity. In the case of emergency start, after the reaction is completed, the cooling device will continue to operate after the xenon lamp is extinguished to ensure that the xenon lamp can be fully cooled and protect the xenon lamp from being burned out.

[0049] The filter system is composed of a mixture inlet, a liquid tank, a vacuum drum filter, a scraper, and a conveyor belt. The photocatalyst and waste liquid mixture enters the liquid tank through the conveying pipe, the vacuum drum filter vacuum pump device is started, the vacuum degree is increased, and the drum starts to rotate to attract the photocatalyst in the liquid tank to the surface of the drum filter. The photocatalyst separated from the liquid surface will continue to be dehydrated and dried under the action of the vacuum pump. After the drum rotates to the best position, the photocatalyst separated is scraped off by the scraper and falls into the conveyor belt, which is transmitted to the photocatalytic activation device under the action of the conveyor belt.

[0050] The photocatalytic activation device is composed of two parts, namely the ultraviolet activation device and the thermal activation device.

[0051] The UV activation device is composed of a UV activation reactor, a deionized water inlet, a catalyst inlet, a stirring paddle, a UV lamp, and a valve. After the dehydrated photocatalyst enters the UV activation reactor, deionized water automatically enters the reactor, and the stirring paddle is automatically started under the action of the motor. After the photocatalyst and deionized water are fully mixed, the UV lamp is turned on. Under the action of the UV lamp, the photocatalyst is initially activated. The activated photocatalyst passes through the valve and enters the next stage.

[0052] The UV activation reactor is a batch reactor and cannot be continuously operated. It takes a certain amount of time to run to the end of the initial activation each time. The internal space of the reactor is limited, so only a certain number of UV lamps are needed to achieve the purpose of initial activation without the need for additional auxiliary devices.

[0053] The thermal activation device mainly uses a fluidized bed. A variable frequency air pump and an air heating device are arranged below the fluidized bed. The air pump intake is adjusted to the optimal intake by the variable frequency device, and the air heating device is started and heated to the most suitable temperature according to the size of the air intake. The air heating device can be automatically controlled by the device or manually controlled remotely. After the hot air flow is stable, the photocatalyst from the UV activation device enters the fluidized bed from the inlet. Under the action of gravity and wind, the unactivated wet catalyst is basically maintained in the middle state in the reaction zone, and the dried photocatalyst floats up to the top of the fluidized bed. Part of the photocatalyst will fly out of the outlet and return to the reaction zone through the solid conveying device to continue participating in the photocatalytic reaction, and the other part of the photocatalyst will return to the fluidized bed through the reflux zone to ensure complete activation of the photocatalyst.

[0054] The fluidized bed outlet is connected to a sampling device, which can sample and analyze the activated photocatalyst to determine the activation degree of the photocatalyst. The photocatalyst activation time can also be modified by sampling and analyzing the photocatalyst for photocatalysts of different properties and structures.

[0055] Through the above process, the photocatalyst can be activated to ensure continuous reaction, improve the utilization rate of the photocatalyst, and also treat wastewater through photocatalytic treatment to produce clear solution for discharge.

Claims

1. A waste liquid photocatalytic treatment device, characterized in that... The waste liquid photocatalytic treatment device includes a photocatalytic reaction device (1), a reflective assembly (2), a filtration system (3), an ultraviolet activation device (4), and a thermal activation device (5). The photocatalytic reaction device (1) includes a base (1-1), an input pipe (1-2), a cylindrical reactor (1-3), an output pipe (1-4), and electrically operated telescopic rods (1-7). The cylindrical reactor (1-3) is made of a light-transmitting material, and four electrically operated telescopic rods are vertically installed on the base (1-1). 1-7), the cylindrical reactor (1-3) is installed on the top of four electric telescopic rods (1-7). Multiple reflective components (2) are arranged on the circumferential direction of the inner wall of the cylindrical reactor (1-3). The water inlet at the top of the cylindrical reactor (1-3) is connected to the input pipe (1-2). Waste liquid and photocatalyst enter the cylindrical reactor (1-3) through the input pipe (1-2). The water outlet at the bottom of the cylindrical reactor (1-3) is connected to the output pipe (1-4). The reflective assembly (2) includes a reflective panel (2-1) and a xenon lamp (2-2). The xenon lamp (2-2) is disposed on the reflective panel (2-1) and is disposed inside a quartz glass cover. The filtration system (3) includes a liquid tank (3-1), a conveying pipe (3-2), a rotary drum vacuum filter (3-3), a scraper (3-4), and a conveyor belt (3-5). The rotary drum vacuum filter (3-3) is installed inside the liquid tank (3-1), and the conveying pipe (3-2) is located above the liquid tank (3-1). During the rotation of the rotary drum vacuum filter (3-3), the photocatalyst is scraped off by the scraper (3-4), and the photocatalyst falls onto the conveyor belt (3-5). The output pipe (1-4) of the cylindrical reactor (1-3) is connected to the conveying pipe (3-2) of the filtration system (3). The ultraviolet activation device (4) includes a reaction vessel (4-1), an ultraviolet lamp (4-2), and a drain pipe (4-4). The photocatalyst is transported to the reaction vessel (4-1) via a conveyor belt (3-5). The photocatalyst in the reaction vessel (4-1) is mixed with deionized water. Multiple ultraviolet lamps (4-2) are installed on the outer wall of the reaction vessel (4-1), and a drain pipe (4-4) is installed at the bottom of the reaction vessel (4-1). The thermal activation device (5) includes a feed port (5-1), a fluidization chamber (5-2), a reflux chamber (5-3), and a heater (5-4). The fluidization chamber (5-2) and the reflux chamber (5-3) are located on the left and right sides of the thermal activation device (5). The bottom of the fluidization chamber (5-2) is a hot air nozzle. The feed port (5-1) is located on the lower side of the fluidization chamber (5-2). The top of the fluidization chamber (5-2) is connected to the top of the reflux chamber (5-3). The lower part of the reflux chamber (5-3) is connected to the reflux port of the fluidization chamber (5-2). The reflux port is located above the hot air nozzle. The drain pipe (4-4) of the ultraviolet activation device (4) is connected to the feed port (5-1) through a connecting pipe. A filter is installed on the connecting pipe.

2. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... The bottom of the cylindrical reactor (1-3) is inverted conical.

3. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... The photocatalytic reaction device (1) also includes a reflux pipe (1-5), one end of which is connected to the input pipe (1-2), and the other end of which is connected to the output pipe (1-4).

4. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... At least one agitator (1-6) is provided in the cylindrical reactor (1-3).

5. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... A solar tracker (1-8) is installed at the top center of the cylindrical reactor (1-3).

6. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... The photocatalyst and deionized water in the reactor (4-1) are mixed by an electric stirrer (4-3) inside the reactor.

7. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... A valve is installed on the drain pipe (4-4).

8. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... The temperature of the hot air in the fluidization chamber (5-2) is controlled to be 50-250℃.

9. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... A sampling port (5-5) is provided at the top of the reflux chamber (5-3).

10. The waste liquid photocatalytic treatment device according to claim 1, characterized in that... An air distribution plate (5-6) is provided at the bottom of the reflux chamber (5-3).

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