Explosion-proof shell structure of NMP waste liquid purification and recovery system

Abstract

The invention discloses an anti-explosion shell structure of an NMP waste liquid purification and recovery system, and belongs to the technical field of NMP waste liquid purification and recovery, and the anti-explosion shell structure comprises a shell, a labyrinth type sealing groove, an electrical wiring frame, a moving mechanism, an anti-explosion mechanism, an anti-explosion cover, an anti-explosion cover and an anti-explosion cover, the shell is used for preventing the shell from exploding, and the detection mechanism is arranged in the shell and used for detecting gas and pressure in the shell. According to the anti-explosion shell structure of the NMP waste liquid purification and recovery system, through the labyrinth type sealing groove, the NMP steam leakage path length and resistance can be increased, NMP steam is effectively prevented from directly leaking to the external environment, the explosion risk is reduced, meanwhile, the labyrinth type sealing groove is matched with the cold and hot gas exchange mechanism, and when the weather is hot, cold air is introduced, so that the NMP waste liquid is purified and recovered. The interior of the shell is kept constant, NMP steam pressure rise caused by too high temperature is prevented, and system safety is further guaranteed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of NMP waste liquid purification and recovery, and particularly relates to an explosion-proof shell structure of an NMP waste liquid purification and recovery system. BACKGROUND

[0002] As a commonly used organic solvent, NMP (N-methyl pyrrolidone) is widely used in many fields such as chemical industry, electronics, and medicine. In the process of NMP waste liquid purification and recovery, NMP is easy to volatilize and flammable and explosive, and improper handling can easily cause safety accidents.

[0003] At present, the existing NMP waste liquid purification and recovery system has many deficiencies in protection. On the one hand, the traditional sealing structure has limited effect on the leakage protection of NMP vapor. NMP vapor is easy to leak to the external environment through the conventional sealing gap, which not only causes resource waste but also increases the risk of explosion, especially during system operation, as the temperature and pressure change, the leakage of NMP vapor will be more serious. SUMMARY

[0004] The purpose of the present application is to increase the path length and resistance of NMP vapor leakage by using a labyrinth sealing groove, effectively prevent NMP vapor from leaking directly to the external environment, reduce the risk of explosion, and at the same time, the labyrinth sealing groove cooperates with the cold and hot gas exchange mechanism. When the weather is hot, cold air is introduced to maintain the constant temperature inside the shell, prevent the pressure of NMP vapor from rising due to too high temperature, further protect the safety of the system, and through the moving mechanism, the nitrogen storage tank in the explosion-proof mechanism is driven to move up and down. When NMP vapor leaks, the moving mechanism can quickly move the nitrogen storage tank to the vicinity of the leakage point, replace the nitrogen in time, reduce the concentration of NMP vapor, and prevent explosion accidents.

[0005] The technical scheme adopted by the present application is as follows: the explosion-proof shell structure of the NMP waste liquid purification and recovery system comprises:

[0006] a shell;

[0007] a labyrinth sealing groove arranged in the shell;

[0008] an electrical wiring frame installed on the inner wall bottom of the shell, which is used to fix electrical wiring;

[0009] a moving mechanism arranged on the electrical wiring frame;

[0010] an explosion-proof mechanism arranged on the moving mechanism, which is used to prevent the shell from exploding;

[0011] a detection mechanism arranged in the shell, which is used to detect the gas and pressure inside the shell;

[0012] The cold and hot gas exchange mechanism is arranged on the shell and is used for exchanging the gas in the labyrinth seal groove.

[0013] The shell comprises an outer shell and an inner shell, the inner shell is fixedly arranged on the top of the inner wall of the outer shell, and the labyrinth seal groove is fixedly arranged between the outer shell and the inner shell.

[0014] A plurality of clamping grooves are arranged on one side of the outer wall of the electrical wiring frame.

[0015] The moving mechanism comprises a forward-reverse motor, a threaded rod, a moving frame and two groups of guide components, the forward-reverse motor is arranged on one side of the outer wall of the electrical wiring frame through bolts, the threaded rod is fixedly arranged on the output end of the forward-reverse motor, the moving frame is threadedly connected to the output end of the threaded rod, and each group of guide components is symmetrically arranged on both sides of the inner wall of the inner shell.

[0016] Each group of guide components comprises a guide rail and a sliding block, the guide rail is fixedly arranged on one side of the inner wall of the inner shell, and the sliding block is slidingly arranged in the inner wall of the guide rail and is fixedly arranged on one side of the outer wall of the moving frame.

[0017] The explosion-proof mechanism comprises a nitrogen storage tank, a valve, a pipeline, a gas outlet, an exhaust valve and an extension component, the nitrogen storage tank is arranged on one side of the outer wall of the moving frame, the valve is arranged on the output end of the nitrogen storage tank, one end of the pipeline is connected with the valve, the other end of the pipeline is connected with the gas outlet, the exhaust valve is arranged on the top of the outer wall of the outer shell, and the extension component is arranged on the moving frame.

[0018] The extension component comprises a gas cylinder and a mounting frame, the gas cylinder is arranged on one side of the outer wall of the moving frame, the mounting frame is fixedly arranged on the output end of the gas cylinder, and the gas outlet is arranged on one side of the outer wall of the mounting frame.

[0019] The detection mechanism comprises a gas detection sensor and a pressure sensor, the gas detection sensor is arranged on one side of the outer wall of the mounting frame, and the pressure sensor is arranged on the top of the inner wall of the inner shell.

[0020] The cold and hot gas exchange mechanism comprises a first gas pipe, a fan, a heat exchanger and a second gas pipe, the fan is arranged on the inner wall of the first gas pipe, the heat exchanger is arranged on one side of the outer wall of the outer shell, one end of the first gas pipe is fixedly arranged on the input end of the heat exchanger, one end of the second gas pipe is fixedly arranged on the output end of the heat exchanger, and the other end of the second gas pipe is connected with the labyrinth seal groove.

[0021] A temperature sensor is fixedly arranged on one side of the inner wall of the labyrinth seal groove.

[0022] In conclusion, due to the adoption of the above technical scheme, the present application has the following advantages:

[0023] (1) In the present application, the labyrinth seal groove can increase the path length and resistance of NMP vapor leakage, effectively prevent NMP vapor from directly leaking to the external environment, reduce the risk of explosion, and at the same time, the labyrinth seal groove cooperates with the cold and hot gas exchange mechanism. When the weather is hot, cold air is introduced to maintain the constant temperature inside the shell, prevent the NMP vapor pressure from rising due to too high temperature, and further ensure the safety of the system.

[0024] (2) In the present application, the moving mechanism is used to drive the nitrogen storage tank in the explosion-proof mechanism to move up and down. When NMP vapor leaks, the moving mechanism can quickly drive the nitrogen storage tank to move to the vicinity of the leakage, replace the nitrogen in time, reduce the concentration of NMP vapor, and prevent the occurrence of explosion accident. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective view of the present application;

[0026] Figure 2 is a sectional view of the present application;

[0027] Figure 3 is a partial exploded view of the present application;

[0028] Figure 4 is a structural schematic view of the labyrinth seal groove of the present application;

[0029] Figure 5 is an enlarged schematic view of A in the present application; Figure 4

[0030] is an enlarged schematic view of B in the present application. Figure 6 Figure 2 In the figure, the marks are: 1, shell; 101, outer shell; 102, inner shell; 2, labyrinth seal groove; 3, electrical wiring frame; 4, moving mechanism; 401, forward and reverse motor; 402, threaded rod; 403, moving frame; 404, guide rail; 405, sliding block; 5, explosion-proof mechanism; 501, nitrogen storage tank; 502, valve; 503, pipeline; 504, gas outlet; 505, exhaust valve; 506, air cylinder; 507, mounting frame; 6, detection mechanism; 601, gas detection sensor; 602, pressure sensor; 7, cold and hot gas exchange mechanism; 701, first air pipe; 702, fan; 703, heat exchanger; 704, second air pipe; 8, clamping groove; 9, temperature sensor. DETAILED DESCRIPTION

[0031]

[0032] ​​In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0033] Embodiment one, refer to Figures 1-6 The explosion-proof shell structure of the NMP waste liquid purification and recovery system comprises:

[0034] a shell 1;

[0035] a labyrinth sealing groove 2 arranged in the shell 1;

[0036] an electrical wiring frame 3 mounted on the inner wall bottom of the shell 1, which is used for fixing electrical wiring;

[0037] a moving mechanism 4 arranged on the electrical wiring frame 3;

[0038] an explosion-proof mechanism 5 arranged on the moving mechanism 4, which is used for preventing the shell 1 from exploding;

[0039] a detection mechanism 6 arranged in the shell 1, which is used for detecting the gas and pressure inside the shell 1;

[0040] a cold and hot gas exchange mechanism 7 arranged on the shell 1, which is used for exchanging the gas in the labyrinth sealing groove 2.

[0041] In this embodiment: the shell 1 provides the basic protection space for the NMP waste liquid purification and recovery system, the labyrinth sealing groove 2 is composed of a series of interlaced and zigzag channels, forming a labyrinth-like structure, which can increase the path length and resistance of NMP vapor leakage, effectively prevent NMP vapor from directly leaking to the external environment, reduce the risk of explosion, and at the same time, the labyrinth sealing groove 2 cooperates with the cold and hot gas exchange mechanism 7 to maintain the internal temperature of the shell 1 by passing in cold air when the weather is hot, preventing the NMP vapor pressure from rising due to excessive temperature, further ensuring system safety, the electrical wiring frame 3 is made of a frame structure with certain strength and rigidity, which provides an orderly arrangement space for electrical wiring, avoiding the disorder of electrical wiring and reducing the risk of fire or explosion caused by electrical failure, the moving mechanism 4 is used to drive the nitrogen storage tank 501 in the explosion-proof mechanism 5 to move up and down, when NMP vapor leaks, the moving mechanism 4 can quickly drive the nitrogen storage tank 501 to move to the vicinity of the leakage point, and replace the nitrogen gas in time to reduce the concentration of NMP vapor and prevent explosion accidents, the explosion-proof mechanism 5 can quickly release nitrogen gas to replace the leakage point and reduce the risk of explosion to ensure system safety, the detection mechanism 6 can detect the gas and pressure inside the shell 1, and the cold and hot gas exchange mechanism 7 can pass cold or hot air into the labyrinth sealing groove 2 to maintain the internal temperature of the shell 1.

[0042] Specifically, the shell 1 includes an outer shell 101 and an inner shell 102, and the inner shell 102 is fixedly arranged on the inner wall top of the outer shell 101, and the labyrinth sealing groove 2 is fixedly arranged between the outer shell 101 and the inner shell 102.

[0043] In this embodiment: a certain space is formed between the outer shell 101 and the inner shell 102 for the installation and placement of the labyrinth sealing groove 2, and the double-layer shell 1 provides a basic protection space for the NMP waste liquid purification and recovery system, which can effectively isolate the internal equipment from the external environment and reduce the influence of external factors on the system.

[0044] Specifically, the outer wall of the electrical wiring frame 3 is provided with a plurality of clamping grooves 8.

[0045] In this embodiment: the plurality of clamping grooves 8 are used to fix the electrical wiring.

[0046] Specifically, the moving mechanism 4 includes a forward and reverse motor 401, a threaded rod 402, a moving frame 403, and two groups of guide components, the forward and reverse motor 401 is installed on one side of the outer wall of the electrical wiring frame 3 through bolts, the threaded rod 402 is fixedly arranged on the output end of the forward and reverse motor 401, the moving frame 403 is threadedly connected to the output end of the threaded rod 402, and each group of guide components is symmetrically arranged on both sides of the inner wall of the inner shell 102.

[0047] In the embodiment, the threaded rod 402 is driven to rotate by the positive and negative motor 401, the nitrogen storage tank 501 is driven to move up and down by the moving frame 403, and the movement of the moving frame 403 is guided and limited by the guide components.

[0048] Specifically, each group of guide components includes a guide rail 404 and a sliding block 405, the guide rail 404 is fixedly arranged on one side of the inner wall of the inner shell 102, and the sliding block 405 is slidingly arranged in the inner wall of the guide rail 404 and is fixedly arranged on one side of the outer wall of the moving frame 403.

[0049] In the embodiment, the movement of the moving frame 403 is guided by the sliding cooperation between the guide rail 404 and the sliding block 405.

[0050] Specifically, the explosion-proof mechanism 5 includes the nitrogen storage tank 501, the valve 502, the pipeline 503, the gas outlet head 504, the exhaust valve 505, and the telescopic component, the nitrogen storage tank 501 is installed on one side of the outer wall of the moving frame 403, the valve 502 is installed on the output end of the nitrogen storage tank 501, one end of the pipeline 503 is connected with the valve 502, the other end of the pipeline 503 is connected with the gas outlet head 504, the exhaust valve 505 is installed on the top of the outer wall of the outer shell 101, and the telescopic component is arranged on the moving frame 403.

[0051] In the embodiment, the nitrogen storage tank 501 is used for storing nitrogen, the valve 502 is used for controlling the release of nitrogen, the pipeline 503 is used for conveying nitrogen, the exhaust valve 505 is connected with the inside of the inner shell 102, and when the pressure inside the inner shell 102 is unstable, the exhaust valve 505 can be automatically or manually opened to discharge the excess gas inside, so that the stability of the pressure inside the shell body 1 is maintained and explosion accidents caused by excessively high pressure are prevented.

[0052] Specifically, the telescopic component includes a gas cylinder 506 and a mounting frame 507, the gas cylinder 506 is installed on one side of the outer wall of the moving frame 403, and the mounting frame 507 is fixedly arranged on the output end of the gas cylinder 506. The gas outlet head 504 is installed on one side of the outer wall of the mounting frame 507.

[0053] In the embodiment, the mounting frame 507 is telescoped by the gas cylinder 506, so that the position of the gas outlet head 504 can be adjusted to be more accurately aligned with the leakage point.

[0054] Specifically, the detection mechanism 6 includes a gas detection sensor 601 and a pressure sensor 602, the gas detection sensor 601 is installed on one side of the outer wall of the mounting frame 507, and the pressure sensor 602 is installed on the top of the inner wall of the inner shell 102.

[0055] In this embodiment: through the gas detection sensor 601, the concentration of NMP vapor inside the shell 1 can be detected in real time, through the pressure sensor 602, the pressure change inside the shell 1 is monitored, when the NMP vapor concentration or pressure is detected to exceed the set threshold, the detection mechanism 6 will send an alarm signal, and control the moving mechanism 4 and the explosion-proof mechanism 5 to take corresponding action.

[0056] Specifically, the cold and hot gas exchange mechanism 7 includes a first air pipe 701, a fan 702, a heat exchanger 703 and a second air pipe 704, the fan 702 is installed on the inner wall of the first air pipe 701, the heat exchanger 703 is installed on the outer wall of the shell 101, one end of the first air pipe 701 is fixedly arranged at the input end of the heat exchanger 703, one end of the second air pipe 704 is fixedly arranged at the output end of the heat exchanger 703, and the other end of the second air pipe 704 is connected with the labyrinth seal groove 2.

[0057] In this embodiment: through the fan 702, external air is sucked into the first air pipe 701, the air enters the heat exchanger 703 for heat exchange, is heated or cooled as needed, and then is delivered into the labyrinth seal groove 2 through the second air pipe 704, so as to adjust the temperature inside the shell 1, prevent the NMP vapor pressure from rising due to too high temperature, and cause explosion.

[0058] Specifically, the inner wall of the labyrinth seal groove 2 is fixedly provided with a temperature sensor 9.

[0059] In this embodiment: the temperature sensor 9 is used to monitor the temperature in the labyrinth seal groove 2 in real time, and provides a feedback signal for the operation of the cold and hot gas exchange mechanism 7, the power sources of the positive and negative motors 401, the valve 502, the air cylinder 506, the temperature sensor 9, the gas detection sensor 601 and the pressure sensor 602 are derived from the external power supply, which should be electrically connected with the external power supply, and the internal circuit principle structure belongs to the common knowledge of those skilled in the art, which will not be described in detail here, and the model can be selected according to the actual use.

[0060] In use, the double-layered shell 1 composed of the outer shell 101 and the inner shell 102 provides a protection space for the internal equipment, effectively prevents NMP vapor leakage through the labyrinth seal groove 2, and ensures the orderly arrangement and safe operation of the electrical wiring through the electrical wiring frame 3. When NMP vapor leakage is detected, the positive and negative motor 401 drives the threaded rod 402 to rotate, which can drive the moving frame 403 to move the nitrogen storage tank 501 up and down, rapidly move the nitrogen storage tank 501 to the vicinity of the leakage point, and at the same time, the air cylinder 506 drives the mounting frame 507 to extend and retract, so as to adjust the position of the air outlet head 504, so that it is more accurately aligned with the leakage point, then the valve 502 is opened, and nitrogen is released to displace the leakage point, thereby reducing the concentration of NMP vapor. At the same time, if the internal pressure of the inner shell 102 is unstable, the exhaust valve 505 is automatically or manually opened to exhaust excess gas and maintain stable pressure. In hot weather, the fan 702 sucks external air into the first air pipe 701, the air enters the heat exchanger 703 for heat exchange, is heated or cooled as needed, and then is delivered to the labyrinth seal groove 2 through the second air pipe 704 to adjust the temperature inside the shell 1, thereby preventing the NMP vapor pressure from rising due to excessive temperature and causing explosion.

[0061] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An explosion-proof housing structure for an NMP waste liquid purification and recovery system, characterized in that, include: Shell (1); A labyrinth-type sealing groove (2) is provided inside the housing (1); An electrical wiring frame (3) is installed on the bottom of the inner wall of the housing (1) and is used to fix electrical wiring. The moving mechanism (4) is mounted on the electrical wiring frame (3); An explosion-proof mechanism (5) is provided on the moving mechanism (4) and is used to prevent the casing (1) from exploding; The detection mechanism (6) is located inside the housing (1) and is used to detect the gas and pressure inside the housing (1); A hot and cold gas exchange mechanism (7) is provided on the housing (1) and is used to exchange the gas in the labyrinth seal groove (2).

2. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 1, characterized in that: The housing (1) includes an outer shell (101) and an inner shell (102). The inner shell (102) is fixedly disposed on the top of the inner wall of the outer shell (101), and the labyrinth-type sealing groove (2) is fixedly disposed between the outer shell (101) and the inner shell (102).

3. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 2, characterized in that: Multiple slots (8) are installed on one side of the outer wall of the electrical wiring frame (3).

4. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 3, characterized in that: The moving mechanism (4) includes a forward and reverse motor (401), a threaded rod (402), a moving frame (403), and two sets of guide components. The forward and reverse motor (401) is bolted to one side of the outer wall of the electrical wiring frame (3). The threaded rod (402) is fixedly set at the output end of the forward and reverse motor (401). The moving frame (403) is threadedly connected to the output end of the threaded rod (402). Each set of guide components is symmetrically arranged on both sides of the inner wall of the inner shell (102).

5. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 4, characterized in that: Each set of guide components includes a guide rail (404) and a slider (405). The guide rail (404) is fixedly disposed on one side of the inner wall of the inner shell (102). The slider (405) is slidably embedded in the inner wall of the guide rail (404) and is fixedly disposed on one side of the outer wall of the movable frame (403).

6. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 5, characterized in that: The explosion-proof mechanism (5) includes a nitrogen storage tank (501), a valve (502), a pipe (503), an outlet (504), an exhaust valve (505), and a telescopic component. The nitrogen storage tank (501) is installed on one side of the outer wall of the movable frame (403). The valve (502) is installed at the output end of the nitrogen storage tank (501). One end of the pipe (503) is connected to the valve (502), and the other end of the pipe (503) is connected to the outlet (504). The exhaust valve (505) is installed on the top of the outer wall of the outer shell (101). The telescopic component is located on the movable frame (403).

7. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 6, characterized in that: The telescopic component includes a cylinder (506) and a mounting bracket (507). The cylinder (506) is mounted on one side of the outer wall of the movable frame (403), and the mounting bracket (507) is fixedly set at the output end of the cylinder (506). The air outlet (504) is mounted on one side of the outer wall of the mounting bracket (507).

8. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 7, characterized in that: The detection mechanism (6) includes a gas detection sensor (601) and a pressure sensor (602). The gas detection sensor (601) is installed on one side of the outer wall of the mounting bracket (507), and the pressure sensor (602) is installed on the top of the inner wall of the inner shell (102).

9. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 8, characterized in that: The hot and cold gas exchange mechanism (7) includes a first gas pipe (701), a fan (702), a heat exchanger (703), and a second gas pipe (704). The fan (702) is installed on the inner wall of the first gas pipe (701), and the heat exchanger (703) is installed on one side of the outer wall of the outer shell (101). One end of the first gas pipe (701) is fixedly set at the input end of the heat exchanger (703), and one end of the second gas pipe (704) is fixedly set at the output end of the heat exchanger (703). The other end of the second gas pipe (704) is connected to the labyrinth seal groove (2).

10. The explosion-proof housing structure of the NMP waste liquid purification and recovery system as described in claim 9, characterized in that: A temperature sensor (9) is fixedly installed on one side of the inner wall of the labyrinth-type sealing groove (2).

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