A tail gas treatment system for photovoltaic panel recycling

Abstract

This utility model discloses a tail gas treatment system for photovoltaic panel recycling, mainly applied in the field of photovoltaic panel recycling equipment technology. It includes a tank, a liquid pump, an air inlet, a reactor, an exhaust outlet, a circulation pipe, a high-pressure nozzle, and a liquid inlet. The reactor is located inside the tank and is connected to the air inlet. An exhaust outlet is located at the top of the tank. One end of the circulation pipe extends into the top of the tank and is connected to the high-pressure nozzle at the end; the other end is connected to the bottom of the tank. The circulation pipe is connected to the liquid pump, and a liquid inlet is located at the top of the tank. This tail gas treatment system for photovoltaic panel recycling features a compact structure, low manufacturing cost, stable and reliable operation, long service life, high tail gas treatment efficiency, reliable quality, reduced production costs for recycling companies, and ensures that tail gas emissions meet standards.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic panel recycling equipment technology, specifically to a photovoltaic panel recycling exhaust gas treatment system. Background Technology

[0002] Photovoltaic panel pyrolysis furnaces are crucial equipment for recycling waste photovoltaic panels. They achieve resource recovery by decomposing the materials within the panels at high temperatures. This process generates various exhaust gases, which have potential impacts on the environment and human health.

[0003] The exhaust gas generated during the pyrolysis of photovoltaic panels has a complex composition, mainly including the following categories:

[0004] 1. Nitrogen oxides: including nitric oxide and nitrogen dioxide, mainly originating from combustion reactions during pyrolysis. These substances can form harmful substances such as nitrates and photochemical smog in the air.

[0005] 2. Sulfides: such as hydrogen sulfide and sulfur dioxide, originate from the decomposition of certain sulfur-containing materials in photovoltaic panels. Sulfides are irritating to the eyes, respiratory system, and skin; long-term exposure may cause cancer.

[0006] 3. Volatile organic compounds (VOCs): These originate from the pyrolysis of organic materials such as photovoltaic panel backsheets. VOCs can cause symptoms such as headaches, dizziness, and nausea, and also contribute to air pollution and ground-level ozone formation.

[0007] 4. Acidic gases: hydrogen chloride, hydrogen fluoride, hydrofluoric acid. These acidic gases will form corrosive liquids when they come into contact with water, damaging water sources and land, and corroding equipment.

[0008] 5. Silicon compounds: silicon tetrachloride, trichlorosilane. These substances are easily hydrolyzed in the air, producing toxic fumes.

[0009] 6. Other pollutants: particulate matter (including silica dust) and heavy metals (such as lead and cadmium).

[0010] Existing exhaust gas treatment systems are inefficient and of poor quality, with emissions of sulfides and nitrogen oxides failing to meet standards, severely polluting the air, endangering the health of workers, and increasing the exhaust gas treatment costs for photovoltaic panel recycling companies. Utility Model Content

[0011] This utility model proposes a tail gas treatment system for photovoltaic panel recycling, which solves the problems of low treatment efficiency and poor quality of tail gas treatment systems for photovoltaic panel pyrolysis furnaces.

[0012] The technical solution of this utility model is as follows: a photovoltaic panel recycling tail gas treatment system, including a tank, a liquid pump, an air inlet, a reactor, an exhaust outlet, a circulation pipe, a high-pressure nozzle, and a liquid inlet. The reactor is located inside the tank and is connected to the air inlet. An exhaust outlet is located at the top of the tank. One end of the circulation pipe extends into the top of the tank and is connected to the high-pressure nozzle at the end. The other end is connected to the bottom of the tank. The circulation pipe is connected to the liquid pump, and a liquid inlet is located at the top of the tank.

[0013] Preferably, the reactor is funnel-shaped with a hollow cavity inside and several through holes evenly distributed on the top panel.

[0014] Preferably, a temporary storage tube is connected to the bottom of the tank, a filter cartridge is inside the temporary storage tube, a pipe is connected to the bottom of the filter cartridge, and a valve is located in the middle of the pipe.

[0015] Preferably, the reactor has a first sedimentation tube below it and a second sedimentation tube below it. The first and second sedimentation tubes are inverted funnel-shaped openings with openings at the top and bottom.

[0016] Preferably, the tank has a level gauge on its outer edge.

[0017] Preferably, a flow meter is installed in the circulation pipeline at the rear end of the liquid pump, and the valve is a three-way solenoid valve, with the flow meter and the three-way solenoid valve connected together.

[0018] Preferably, a negative pressure device is connected to the end of the exhaust port.

[0019] Preferably, the tank body, the first sedimentation tube, and the second sedimentation tube are made of stainless steel.

[0020] Preferably, the filter cartridge is made of stainless steel.

[0021] The principle of this invention: To solve the problems of low processing efficiency and poor quality in existing photovoltaic panel pyrolysis furnace tail gas treatment systems, this invention employs the following technical means: A reactor, funnel-shaped, is located at the top of the tank. The top surface is perforated, and the bottom connects to the air inlet. The tank is filled with a reaction liquid, the liquid level exceeding the top of the reactor. When tail gas enters the reactor through the air inlet, it is diffused through the reactor, increasing the contact area with the reaction liquid and improving the tail gas treatment efficiency and quality. Circulation pipes are located at the bottom and top of the tank. A liquid pump is connected in the middle of the circulation pipes to extract the reaction liquid from the bottom of the tank. The reaction liquid is then pressurized and sprayed from a high-pressure nozzle at the top of the circulation pipes. The reaction liquid is atomized and reacts again with the overflowing tail gas, further treating the components in the tail gas. In this way, harmful gases in the tail gas are fully reacted with the reaction liquid... The reaction involves contact, absorbing as many harmful components as possible from the exhaust gas. The tank has a first sedimentation tube and a second sedimentation tube in the middle and bottom. The first sedimentation tube primarily reduces the fluctuation of the reaction liquid. Under gravity, particulate matter, heavy metals, and solid particles generated during the reaction settle downwards, entering the second sedimentation tube through the flared opening at the bottom of the first sedimentation tube. The second sedimentation tube further reduces the fluctuation of the reaction liquid, accelerating the sedimentation of particulate matter, heavy metals, and solid particles generated during the reaction. The solid particles are finally collected in the filter cartridge and discharged through a valve. The consumed reaction liquid is replenished from the inlet. When multiple tanks are used in series, different reaction liquids are injected into each tank to remove different exhaust gas components. For example, alkaline solutions are used to remove acidic gases, hydrogen sulfide, and sulfur dioxide, while oxidants remove hydrogen sulfide. Recycling companies can choose different chemical treatment methods based on their own conditions, which will not be elaborated further.

[0022] The beneficial effects of this utility model are as follows: A photovoltaic panel recycling tail gas treatment system has a compact structure, low manufacturing cost, stable and reliable operation, long service life, high tail gas treatment efficiency, reliable quality, reduces the production cost of recycling enterprises, and ensures that tail gas emissions meet standards. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a three-dimensional sectional view of the present invention;

[0025] In the diagram, 101-tank body, 102-air inlet, 103-reactor, 104-exhaust port, 105-circulation pipe, 106-high pressure nozzle, 107-liquid pump, 108-temporary storage pipe, 109-filter cartridge, 110-valve, 111-first sedimentation pipe, 112-second sedimentation pipe, 113-liquid inlet, 114-level gauge. Detailed Implementation

[0026] The specific implementation method of this utility model is as follows: Figure 1 , Figure 2 As shown, a photovoltaic panel recycling exhaust gas treatment system includes a tank 101, a liquid pump 107, an air inlet 102, a reactor 103, an exhaust outlet 104, a circulation pipe 105, a high-pressure nozzle 106, and a liquid inlet 113. The reactor 103 is located inside the tank 101 and is connected to the air inlet 102. The exhaust outlet 104 is located at the top of the tank 101. One end of the circulation pipe 105 extends into the top of the tank 101 and is connected to the high-pressure nozzle 106 at the end. The other end is connected to the bottom of the tank 101. The circulation pipe 105 is connected to the liquid pump 107. The liquid inlet 113 is located at the top of the tank 101. In this embodiment, after the exhaust gas enters the reactor 103 through the exhaust gas inlet 102, the exhaust gas is diffused through the reactor 103, which increases the contact area with the reaction liquid and improves the exhaust gas treatment efficiency and quality. There are circulation pipes 105 at the bottom and top of the tank 101. A liquid pump 107 is connected in the middle of the circulation pipe 105 to draw the reaction liquid from the bottom of the tank 101. Then the reaction liquid is pressurized and sprayed out from the high-pressure nozzle 106 at the top of the circulation pipe 105. The reaction liquid is in an atomized state and reacts with the overflowing exhaust gas again to treat the components in the exhaust gas again. In this way, the harmful gases in the exhaust gas come into full contact with the reaction liquid and react, absorbing the harmful components in the exhaust gas as much as possible.

[0027] Specifically, such as Figure 2 As shown, the reactor 103 is funnel-shaped with a hollow interior and several through holes evenly distributed on the top panel. In this embodiment, the reactor 103 has a large number of through holes at the top, resulting in good exhaust gas diffusion and increased contact area with the reaction liquid, thus improving the exhaust gas treatment efficiency and quality.

[0028] Specifically, such as Figure 2 The bottom of the tank 101 is connected to a temporary storage tube 108, and a filter cartridge 109 is located inside the temporary storage tube 108. The bottom of the filter cartridge 109 is connected to a pipe, and a valve 110 is located in the middle of the pipe. In this embodiment, the filter cartridge 109 is used to filter particulate matter, heavy metals, and solid particles generated by the reaction. The particulate matter can be discharged from the valve 110, thereby improving the utilization efficiency of the reaction solution.

[0029] Specifically, such as Figure 2 As shown, below the reactor 103 is a first sedimentation tube 111, and below the first sedimentation tube 111 is a second sedimentation tube 112. The first sedimentation tube 111 and the second sedimentation tube 112 are inverted funnel-shaped openings, with openings at the top and bottom. In this embodiment, the first sedimentation tube 111 and the second sedimentation tube 112 are used to reduce the fluctuation of the reaction liquid. Under the action of gravity, particulate matter, heavy metals, and solid particles generated by the reaction in the exhaust gas settle downwards.

[0030] Specifically, such as Figure 1As shown, a level gauge 114 is located on the outer edge of the tank 101. In this embodiment, the level gauge 114 allows the operator to check the level of the reaction liquid and add reaction liquid in a timely manner.

[0031] Specifically, a flow meter is installed in the circulation pipe 105 at the rear end of the liquid pump 107, and the valve 110 is a three-way solenoid valve. The flow meter and the three-way solenoid valve are connected together. In this embodiment, the three-way solenoid valve can be used to discharge solid particles and can also be connected to clean water for backwashing the inside of the tank 101, making maintenance convenient.

[0032] Specifically, a negative pressure device is connected to the end of the exhaust port 104. In this embodiment, the negative pressure device is used to draw out the exhaust gas in the tank 101, reduce the exhaust gas running resistance, increase the contact area with the reaction liquid, and improve the processing efficiency and quality.

[0033] Specifically, the tank body 101, the first sedimentation tube 111, and the second sedimentation tube 112 are made of stainless steel. In this embodiment, the stainless steel tank body 101, the first sedimentation tube 111, and the second sedimentation tube 112 are not prone to corrosion and have a long service life.

[0034] Specifically, the filter cartridge 109 is made of stainless steel. In this embodiment, the stainless steel filter cartridge 109 is not prone to rust or clogging, has a long service life, and operates stably and reliably.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tail gas treatment system for photovoltaic panel recycling, comprising a tank (101) and a liquid pump (107), characterized in that: It also includes an air inlet (102), a reactor (103), an exhaust port (104), a circulation pipe (105), a high-pressure nozzle (106), and a liquid inlet (113). The tank (101) contains a reactor (103), which is connected to the air inlet (102). The tank (101) has an exhaust port (104) at the top. One end of the circulation pipe (105) extends into the top of the tank (101), and the end is connected to the high-pressure nozzle (106). The other end is connected to the bottom of the tank (101). The circulation pipe (105) is connected to a liquid pump (107). The tank (101) has a liquid inlet (113) at the top.

2. The photovoltaic panel recycling tail gas treatment system according to claim 1, characterized in that: The reactor (103) is funnel-shaped with a hollow cavity inside and several through holes evenly distributed on the top panel.

3. The photovoltaic panel recycling tail gas treatment system according to claim 1, characterized in that: The tank (101) is connected to a temporary storage tube (108) at the bottom. The temporary storage tube (108) contains a filter cartridge (109). The filter cartridge (109) is connected to a pipe at the bottom, and a valve (110) is located in the middle of the pipe.

4. The photovoltaic panel recycling tail gas treatment system according to claim 1, characterized in that: Below the reactor (103) is a first sedimentation tube (111), and below the first sedimentation tube (111) is a second sedimentation tube (112). The first sedimentation tube (111) and the second sedimentation tube (112) are inverted funnel mouths with openings at the top and bottom.

5. The photovoltaic panel recycling tail gas treatment system according to claim 1, characterized in that: The tank (101) has a level gauge (114) on its outer edge.

6. The photovoltaic panel recycling tail gas treatment system according to claim 3, characterized in that: The flow meter is located in the circulation pipe (105) at the rear end of the liquid pump (107), and the valve (110) is a three-way solenoid valve. The flow meter and the three-way solenoid valve are connected together.

7. The photovoltaic panel recycling tail gas treatment system according to claim 1, characterized in that: The exhaust port (104) is connected to a negative pressure device at its end.

8. The photovoltaic panel recycling tail gas treatment system according to claim 4, characterized in that: The tank (101), the first sedimentation tube (111), and the second sedimentation tube (112) are made of stainless steel.

9. The photovoltaic panel recycling tail gas treatment system according to claim 3, characterized in that: The filter cartridge (109) is made of stainless steel.

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