Waste discharge device for preventing leakage of acid liquor

Abstract

The utility model discloses a waste discharge device capable of preventing leakage of acid liquor, which comprises an anti-corrosion waste discharge pipe, one end of the anti-corrosion waste discharge pipe is communicated with a reaction chamber, the other end of the anti-corrosion waste discharge pipe is communicated with a liquor collection bottle, the liquor collection bottle is provided with an acid liquor discharge port and an air extraction acid discharge port, and an air draft device is mounted at one end of the anti-corrosion waste discharge pipe, which is positioned at the liquor collection bottle; a sealing device is installed on the anti-corrosion waste discharge pipe, an alarm device is installed on the outer wall of the anti-corrosion waste discharge pipe, the sealing device is arranged between the alarm device and the liquid collection bottle, and the alarm device is electrically connected with the sealing device. According to the utility model, the corrosion of phosphorus oxychloride can be effectively prevented, and after the air draft device is corroded and perforated, on one hand, the leakage of phosphorus oxychloride can be prevented by utilizing the liquid collecting bottle, so that great harm to operators is avoided; and on the other hand, phosphorus oxychloride in the liquid collecting bottle can be prevented from flowing back into the reaction chamber through the sealing device, the requirement of the reaction chamber for cleanliness is guaranteed, an alarm can be given through the alarm device, and workers can conveniently handle the phosphorus oxychloride in time.

Description

Technical Field

[0001] The utility model relates to the technical field of waste discharge devices, in particular to a waste discharge device for preventing acid liquid leakage. Background Art

[0002] In the production process of crystalline silicon solar cells, the diffusion process forms a PN junction at the junction of the two semiconductors by doping the impurity element phosphorus into P-type silicon in the reaction chamber under low pressure and high temperature conditions. Among them, the reaction chamber is a closed space with high requirements for temperature, pressure and cleanliness. Since a large amount of toxic substances are produced during the reaction process, such as chlorine and phosphorus pentachloride, in actual production, the reaction chamber is maintained at a low pressure of 50 to 100 mbar, and a vacuum pump is configured to extract the exhaust gas in time, and the condensed phosphorus pentachloride and other liquids are collected in a liquid collection bottle. Especially when dealing with waste containing phosphorus oxychloride, due to the strong corrosiveness of phosphorus oxychloride, the requirements for the processing equipment are very high. The traditional treatment method is to install an exhaust port at the outlet of the quartz tube to extract the phosphorus oxychloride. This exhaust device is usually made of stainless steel or iron sheet to resist the corrosion of phosphorus oxychloride.

[0003] The existing solutions are mainly to improve the design of the exhaust device to improve its corrosion resistance. For example, the exhaust device can be made of more corrosion-resistant materials, or the exhaust device can be subjected to special anti-corrosion treatment. In addition, the structural design of the exhaust device can be improved to make it more durable, thereby extending its service life. Although the existing solutions have improved the corrosion resistance of the exhaust device to a certain extent, there are still some problems. First, due to the extremely strong corrosiveness of phosphorus oxychloride, even if more corrosion-resistant materials are used or special anti-corrosion treatment is performed, the service life of the exhaust device is still limited, generally only half a year to a year. Secondly, when the exhaust device is corroded and perforated, phosphorus oxychloride will leak out, causing great harm to the operator. Therefore, how to effectively prevent the leakage of phosphorus oxychloride is an important issue facing current chemical waste treatment technology. Utility Model Content

[0004] The utility model aims to provide a waste discharge device for preventing acid liquid leakage, so as to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides a waste discharge device for preventing acid liquid leakage, comprising an anti-corrosion waste discharge pipe, one end of the anti-corrosion waste discharge pipe is connected to the reaction chamber, the other end of the anti-corrosion waste discharge pipe is connected to a liquid collecting bottle, the liquid collecting bottle is provided with an acid liquid discharge port and an acid exhaust port, and the anti-corrosion waste discharge pipe is located at one end of the liquid collecting bottle and is equipped with an exhaust device; a closing device is installed on the anti-corrosion waste discharge pipe, a liquid sensor is installed on the closing device, and the liquid sensor is arranged at the inner bottom of the anti-corrosion waste discharge pipe; an alarm device is installed on the outer wall of the anti-corrosion waste discharge pipe, the closing device is arranged between the alarm device and the liquid collecting bottle, and the alarm device is electrically connected to the closing device.

[0006] Preferably, an observation window is provided on the liquid collecting bottle, and the observation window is a transparent plastic plate.

[0007] Preferably, the thickness of the transparent plastic plate is 5 mm, and the distance between the transparent plastic plate and the anti-corrosion waste discharge pipe is 20 cm.

[0008] Preferably, the alarm device is arranged at the outlet end of the anti-corrosion waste discharge pipe, and the distance between the alarm device and the outlet end of the anti-corrosion waste discharge pipe is 1 m.

[0009] Preferably, the alarm device is an audible and visual alarm.

[0010] Preferably, the distance between the closing device and the outlet end of the anti-corrosion waste pipe is 50 cm.

[0011] Preferably, the closing device is an electric valve.

[0012] Preferably, the anti-corrosion waste discharge pipe is a polytetrafluoroethylene pipe, and the inner diameter of the anti-corrosion waste discharge pipe is 10 cm and the length is 2 m.

[0013] Compared with the prior art, the utility model has the following advantages and technical effects:

[0014] The waste discharge device for preventing acid liquid leakage provided by the utility model can effectively prevent the corrosion of phosphorus oxychloride. At the same time, after the exhaust device is corroded and perforated, on the one hand, the leakage of phosphorus oxychloride can be prevented by using the liquid collecting bottle to avoid causing great harm to the operator; on the other hand, the closing device can prevent the phosphorus oxychloride in the liquid collecting bottle from flowing back into the reaction chamber, thereby ensuring the cleanliness requirements of the reaction chamber, and an alarm can be issued through the alarm device to facilitate timely processing by the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the waste discharge device for preventing acid liquid leakage of the utility model;

[0017] In the figure: 1. Reaction chamber; 2. Anti-corrosion waste pipe; 3. Closure device; 4. Alarm device; 5. Liquid collecting bottle; 6. Observation window; 7. Acid discharge port; 8. Acid exhaust port. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] like Figure 1 As shown, the utility model provides a waste discharge device for preventing acid liquid leakage, including an anti-corrosion waste discharge pipe 2, one end of which is connected to a reaction chamber 1, and the other end of which is connected to a liquid collecting bottle 5, on which an acid liquid discharge port 7 and an acid exhaust port 8 are provided, and an exhaust device is installed at one end of the anti-corrosion waste discharge pipe 2 located in the liquid collecting bottle 5; a closing device 3 is installed on the anti-corrosion waste discharge pipe 2, and a liquid sensor is installed on the closing device 3, and the liquid sensor is arranged at the inner bottom of the anti-corrosion waste discharge pipe 2; an alarm device 4 is installed on the outer wall of the anti-corrosion waste discharge pipe 2, and the closing device 3 is arranged between the alarm device 4 and the liquid collecting bottle 5, and the alarm device 4 is electrically connected to the closing device 3.

[0020] According to a further optimized solution, an observation window 6 is provided on the liquid collecting bottle 5, and the observation window 6 is a transparent plastic plate.

[0021] According to a further optimization scheme, the thickness of the transparent plastic plate is 5 mm, and the distance between the transparent plastic plate and the anti-corrosion waste discharge pipe 2 is 20 cm.

[0022] According to a further optimization scheme, the alarm device 4 is arranged at the outlet end of the anti-corrosion waste discharge pipe 2, and the distance between the alarm device 4 and the outlet end of the anti-corrosion waste discharge pipe 2 is 1 m.

[0023] According to a further optimized solution, the alarm device 4 is an audible and visual alarm.

[0024] According to a further optimized solution, the distance between the closing device 3 and the outlet end of the anti-corrosion waste pipe 2 is 50 cm.

[0025] According to a further optimized solution, the closing device 3 is an electric valve.

[0026] According to a further optimization scheme, the anti-corrosion waste discharge pipe 2 is a polytetrafluoroethylene pipe, and the inner diameter of the anti-corrosion waste discharge pipe 2 is 10 cm and the length is 2 m.

[0027] The utility model provides a waste discharge device for preventing acid leakage, and the anti-corrosion waste discharge pipe 2 is made of corrosion-resistant materials, such as polytetrafluoroethylene or titanium alloy. Specifically, a polytetrafluoroethylene tube with an inner diameter of 10 cm and a length of 2 m can be selected as the waste discharge pipe. The anti-corrosion waste discharge pipe 2 has good corrosion resistance and can effectively resist the corrosion of phosphorus oxychloride, thereby increasing the service life of the exhaust device. The closing device 3 adopts an electric valve, model DN50. When liquid is detected to pass through, the valve is automatically closed to prevent the flow of liquid. The alarm device 4 uses an audible and visual alarm, model LTE-1101J. When the closing device 3 detects that liquid passes through, the alarm device 4 will automatically emit sound and light alarms according to the triggering of the closing device 3. An observation window 6 is set on the liquid collecting bottle 5, and the observation window 6 is made of a transparent plastic plate made of polymethyl methacrylate. In this way, the operator can observe the working status of the exhaust device through the observation window 6 at any time, and promptly discover and deal with problems. The electric valve and the sound and light alarm are both commercially available parts, and their working principles and connection structures are known in the prior art and will not be described in detail here.

[0028] The waste discharge device for preventing acid liquid leakage provided by the utility model can effectively prevent the corrosion of phosphorus oxychloride. At the same time, after the exhaust device is corroded and perforated, on the one hand, the liquid collecting bottle 5 can be used to prevent the leakage of phosphorus oxychloride, thereby avoiding great harm to the operator; on the other hand, the closing device 3 can be used to prevent the phosphorus oxychloride in the liquid collecting bottle 5 from flowing back into the reaction chamber 1, thereby ensuring the cleanliness requirement of the reaction chamber 1, and an alarm can be issued through the alarm device 4, so that the staff can handle it in time.

[0029] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A waste discharge device for preventing acid leakage, characterized in that: The invention comprises an anti-corrosion waste discharge pipe (2), one end of which is connected to a reaction chamber (1), and the other end of which is connected to a liquid collecting bottle (5), and the liquid collecting bottle (5) is provided with an acid liquid discharge port (7) and an acid exhaust port (8), and an exhaust device is installed at one end of the anti-corrosion waste discharge pipe (2) located at the liquid collecting bottle (5); a sealing device (3) is installed on the anti-corrosion waste discharge pipe (2), and a liquid sensor is installed on the sealing device (3), and the liquid sensor is arranged at the inner bottom of the anti-corrosion waste discharge pipe (2); an alarm device (4) is installed on the outer wall of the anti-corrosion waste discharge pipe (2), and the sealing device (3) is arranged between the alarm device (4) and the liquid collecting bottle (5), and the alarm device (4) is electrically connected to the sealing device (3).

2. The waste discharge device for preventing acid leakage according to claim 1, characterized in that: The liquid collecting bottle (5) is provided with an observation window (6), and the observation window (6) is a transparent plastic plate.

3. The waste discharge device for preventing acid leakage according to claim 2, characterized in that: The thickness of the transparent plastic plate is 5 mm, and the distance between the transparent plastic plate and the anti-corrosion waste discharge pipe (2) is 20 cm.

4. The waste discharge device for preventing acid leakage according to claim 1, characterized in that: The alarm device (4) is arranged at the outlet end of the anti-corrosion waste discharge pipe (2), and the distance between the alarm device (4) and the outlet end of the anti-corrosion waste discharge pipe (2) is 1 m.

5. The waste discharge device for preventing acid liquid leakage according to claim 4, characterized in that: The alarm device (4) is an audible and visual alarm.

6. The waste discharge device for preventing acid liquid leakage according to claim 4, characterized in that: The distance between the closing device (3) and the outlet end of the anti-corrosion waste discharge pipe (2) is 50 cm.

7. The waste discharge device for preventing acid leakage according to claim 6, characterized in that: The closing device (3) is an electric valve.

8. The waste discharge device for preventing acid leakage according to claim 1, characterized in that: The anti-corrosion waste discharge pipe (2) is a polytetrafluoroethylene pipe, and the inner diameter of the anti-corrosion waste discharge pipe (2) is 10 cm and the length is 2 m.

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