NMP vacuum dehydration tower sampling device

Abstract

The utility model provides a kind of NMP pressure-reducing dehydration tower sampling device, it is related to chemical detection technical field, including connecting pipe, the connecting pipe includes pipe body, flowmeter is installed on the pipe body, flowmeter is used to measure the flow of medium to be sampled passing through pipe body, to understand the extraction speed or flow condition of sample, the lower end of the pipe body and shell are communicated.This NMP pressure-reducing dehydration tower sampling device when sampling dehydration tower, first start vacuum pump, vacuum pump can extract the air inside shell, at this time, shell interior is in negative pressure state, and the pressure generated is greater than the pressure of the spring force and the pressure inside pipe body, at this time, start hydraulic rod, so that hydraulic rod drives sealing element to move downwards, the medium to be sampled in pipe body will fill shell, at this time, open first valve can be taken out medium to be sampled, the device can sample dehydration tower under negative pressure environment, reduce external air into dehydration tower.

Description

Technical Field

[0001] This utility model relates to a sampling device, specifically an NMP depressurization dehydration tower sampling device, belonging to the field of chemical detection technology. Background Technology

[0002] NMP vacuum dehydration towers are used for the recovery of N-methylpyrrolidone (NMP) solvent in lithium battery recycling or manufacturing processes. They achieve effective separation of water and NMP through vacuum decompression and cooling, ensuring the purity of the recovered solvent and the operational stability of the system.

[0003] During the dehydration process, to ensure operational safety and product quality, real-time monitoring and analysis of the liquid inside the tower are necessary. This is where the sampling device plays a crucial role. The sampling device is typically installed at an appropriate location within the dehydration tower, enabling the collection of representative samples while the system is running. This facilitates component analysis and process adjustments by the operators.

[0004] Existing sampling devices mostly employ a valve-connected sampling tube structure, installed on the side wall of a container or pipe, with sampling achieved by manually opening the valve. This type of device is simple in structure, easy to operate, and widely used in sampling analysis. However, it has certain shortcomings when applied to NMP vacuum dehydration towers. The dehydration tower operates under negative pressure, and the aforementioned method easily allows outside air to enter the tower, affecting its operation. Therefore, this paper proposes a sampling device for NMP vacuum dehydration towers. Utility Model Content

[0005] This invention proposes an NMP decompression dehydration tower sampling device, which can sample the dehydration tower under negative pressure, reducing the amount of outside air entering the dehydration tower.

[0006] This utility model is achieved through the following technical solution: an NMP depressurization dehydration tower sampling device, including a connecting pipe, the connecting pipe including a pipe body, a flow meter installed on the pipe body, the flow meter being used to measure the flow rate of the sample medium passing through the pipe body, so as to understand the sampling speed or flow rate of the sample, the lower end of the pipe body being connected to the shell, and the other end of the pipe body being connected to a sealing flange, the pipe body being able to be fixed on the dehydration tower through the sealing flange, and the pipe body and the dehydration tower being connected.

[0007] It also includes a sampling component, which is disposed on the tube body. The sampling component includes a housing, and the bottom of the housing is connected to an output tube. The output tube transports the collected sample from the housing to a subsequent collection device, such as a sample collection container or an analytical instrument. A first valve is installed on the output tube to control the opening and closing of the output tube.

[0008] The housing is equipped with a negative pressure component and a control component. The negative pressure component is used to regulate the pressure state inside the housing. The negative pressure component includes a mounting frame that can extract gas from the housing to create a negative pressure environment inside the housing. A vacuum pump is installed on the mounting frame. The output end of the vacuum pump is connected to a pipe. The pipe is connected to the housing. A second valve is installed on the pipe. The second valve is used to control the connection between the pipe and the housing.

[0009] The control component is used to control the communication state between the housing and the tube. The control component includes a seal, which is used to control the opening and closing of the tube and the housing. A compression spring is fixed to the bottom of the seal, and a sealing ring is fixed to the bottom of the compression spring. The sealing ring is fixed inside the housing. The control component also includes a drive component, which is used to drive the seal to move.

[0010] The driving component includes a connecting column, which is fixed to the bottom of the seal. A hydraulic rod is fixed to the bottom of the connecting column and is fixed to the mounting bracket. The output end of the hydraulic rod is located on the housing. When the hydraulic rod is activated, its output end will slide on the sliding sealing shaft, and the hydraulic rod can drive the connecting column and the seal to move.

[0011] The control component also includes a sliding sealing shaft, which is fixed to the bottom of the housing, and the output end of the hydraulic rod is slidably connected to the bottom of the housing via the sliding sealing shaft.

[0012] This invention provides a sampling device for an NMP vacuum dehydration tower, which has the following beneficial effects:

[0013] 1. When sampling the dehydration tower, the NMP vacuum dehydration tower sampling device first starts the vacuum pump, which extracts the air from the shell. At this time, the shell is under negative pressure, and the pressure generated is greater than the sum of the spring force and the pressure inside the tube. Then, the hydraulic rod is activated, which moves the sealing element downward. The sampled medium inside the tube will fill the shell. At this time, the first valve can be opened to remove the sampled medium. This device can sample the dehydration tower under negative pressure, reducing the amount of outside air entering the dehydration tower. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the assembly structure of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the internal structure of the shell of this utility model;

[0017] Figure 4For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0018] Explanation of reference numerals in the attached figures

[0019] 1. Connecting pipe; 101. Pipe body; 102. Flow meter; 103. Sealing flange;

[0020] 2. Sampling component; 201. Housing; 202. Output pipe; 203. First valve;

[0021] 3. Negative pressure components; 301. Mounting bracket; 302. Vacuum pump; 303. Piping; 304. Second valve;

[0022] 4. Control components; 401. Seals; 402. Compression springs; 403. Sealing rings; 404. Hydraulic rods; 405. Sliding sealing shafts; 406. Connecting columns;

[0023] 5. Dehydration tower. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0025] Please see Figures 1-4 The present invention proposes the following implementation scheme: an NMP depressurization dehydration tower sampling device, including a connecting pipe 1, the connecting pipe 1 including a pipe body 101, a flow meter 102 installed on the pipe body 101, the flow meter 102 is used to measure the flow rate of the sample medium passing through the pipe body 101, so as to understand the sampling speed or flow rate. The lower end of the pipe body 101 is connected to the shell 201, and the other end of the pipe body 101 is connected to a sealing flange 103. The pipe body 101 can be fixed on the dehydration tower 5 through the sealing flange 103, and the pipe body 101 and the dehydration tower 5 are connected.

[0026] Please refer to this carefully. Figure 2 and Figure 3 It also includes a sampling component 2, which is disposed on the tube body 101. The sampling component 2 includes a housing 201, and the bottom of the housing 201 is connected to an output tube 202. The output tube 202 transports the collected sample from the housing 201 to a subsequent collection device, such as a sample collection container or an analytical instrument. A first valve 203 is installed on the output tube 202 to control the opening and closing of the output tube 202.

[0027] Please refer to this carefully. Figure 2 and Figure 3 The housing 201 is provided with a negative pressure component 3 and a control component 4. The negative pressure component 3 is used to adjust the pressure state inside the housing 201. The negative pressure component 3 includes a mounting bracket 301, which can extract gas from the housing 201 to create a negative pressure environment inside the housing 201.

[0028] A vacuum pump 302 is installed on the mounting bracket 301. The output end of the vacuum pump 302 is connected to a pipe 303, which is connected to the housing 201. A second valve 304 is installed on the pipe 303, which is used to control the connection between the pipe 303 and the housing 201.

[0029] The control component 4 is used to control the communication state between the housing 201 and the tube 101. The control component 4 includes a seal 401, which is used to control the opening and closing of the tube 101 and the housing 201. A compression spring 402 is fixed to the bottom of the seal 401, and a sealing ring 403 is fixed to the bottom of the compression spring 402. The sealing ring 403 is fixed inside the housing 201. The control component 4 also includes a drive component, which is used to drive the seal 401 to move.

[0030] The driving component includes a connecting column 406, which is fixed to the bottom of the seal 401. A hydraulic rod 404 is fixed to the bottom of the connecting column 406 and is fixed to the mounting bracket 301. The output end of the hydraulic rod 404 is located on the housing 201. When the hydraulic rod 404 is started, its output end will slide on the sliding sealing shaft 405, and the hydraulic rod 404 can drive the connecting column 406 and the seal 401 to move.

[0031] The control component 4 also includes a sliding sealing shaft 405, which is fixed to the bottom of the housing 201. The output end of the hydraulic rod 404 is slidably connected to the bottom of the housing 201 through the sliding sealing shaft 405.

[0032] Working principle: When sampling the dehydration tower 5, the vacuum pump 302 is started first. The vacuum pump 302 can extract the air inside the shell 201. At this time, the shell 201 is in a negative pressure state, and the pressure generated is greater than the sum of the elastic force of the compression spring 402 and the pressure inside the tube 101. Then the vacuum pump 302 and the second valve 304 are closed.

[0033] At this time, the hydraulic rod 404 is activated, causing the hydraulic rod 404 to move the seal 401 downward. The housing 201 and the pipe 101 are in a connected state, and the sampled medium in the pipe 101 will fill the housing 201. The flow rate can be detected by the flow meter 102. At this time, the first valve 203 can be opened to remove the sampled medium. This device can sample the dehydration tower 5 under negative pressure, reducing the amount of outside air entering the dehydration tower 5. After sampling is completed, the hydraulic rod 404 is activated in reverse.

[0034] 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 sampling device for an NMP depressurization dehydration tower, comprising a connecting pipe (1), wherein the connecting pipe (1) comprises a pipe body (101), characterized in that: It also includes a sampling component (2), which is disposed on the tube body (101); The sampling component (2) includes a housing (201), the bottom of which is connected to an output pipe (202). A first valve (203) is installed on the output pipe (202). A negative pressure component (3) and a control component (4) are provided on the housing (201). The negative pressure component (3) is used to adjust the pressure state inside the housing (201), and the control component (4) is used to control the communication state between the housing (201) and the pipe (101).

2. The NMP depressurization dehydration tower sampling device according to claim 1, characterized in that: A flow meter (102) is installed on the pipe body (101), and a sealing flange (103) is connected to the other end of the pipe body (101).

3. The NMP depressurization dehydration tower sampling device according to claim 1, characterized in that: The negative pressure component (3) includes a mounting bracket (301), on which a vacuum pump (302) is mounted. The output end of the vacuum pump (302) is connected to a pipe (303), which is connected to the housing (201). A second valve (304) is mounted on the pipe (303).

4. The NMP depressurization dehydration tower sampling device according to claim 3, characterized in that: The control component (4) includes a seal (401), a compression spring (402) is fixed to the bottom of the seal (401), a sealing ring (403) is fixed to the bottom of the compression spring (402), and the sealing ring (403) is fixed inside the housing (201). The control component (4) also includes a drive component, which is used to drive the seal (401) to move.

5. The NMP depressurization dehydration tower sampling device according to claim 4, characterized in that: The drive component includes a connecting column (406) fixed to the bottom of the seal (401), a hydraulic rod (404) fixed to the bottom of the connecting column (406), the hydraulic rod (404) fixed to the mounting bracket (301), and the output end of the hydraulic rod (404) disposed on the housing (201).

6. The NMP vacuum dehydration tower sampling device according to claim 5, characterized in that: The control component (4) also includes a sliding sealing shaft (405), which is fixed to the bottom of the housing (201). The output end of the hydraulic rod (404) is slidably connected to the bottom of the housing (201) through the sliding sealing shaft (405).

7. The NMP depressurization dehydration tower sampling device according to claim 2, characterized in that: The lower end of the tube (101) is connected to the shell (201).

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