Fuming acid sampler

Abstract

The utility model relates to the technical field of chemical engineering sampling, and discloses a fuming acid sampler, which comprises a cylindrical shell and a bottom plate fixedly mounted at the bottom of the shell; the gas-liquid separation structure comprises a gas separation part and a liquid separation part, the gas separation part comprises a transverse baffle fixedly mounted on the inner wall of the shell, a vertical baffle is fixedly mounted at the bottom of the transverse baffle, and a 70-millimeter distance is reserved between the bottom of the vertical baffle and the top of the bottom plate; the inner wall of the transverse baffle and the inner wall of the vertical baffle jointly define an acid mist collecting box in the shell, a hole is formed in the outer wall of one side of the shell, an acid mist discharging pipe is fixedly installed in the hole, and the acid mist discharging pipe is communicated with the acid mist collecting box; the liquid separation part comprises a vertical baffle acid passing baffle arranged between the vertical baffle and the bottom plate, so that the purpose of carrying out gas-liquid separation and collection on sample acid is achieved, generated waste gas is collected, purified and recycled, the sampling efficiency of the device is improved, and waste gas pollution is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of chemical sampling technology, specifically, it relates to a fuming acid sampler. Background Technology

[0002] In chemical production, fuming acid is an important chemical raw material, and its quality testing is crucial, with sampling being the foundation of quality testing. Currently, some companies are still using old-fashioned samplers to sample fuming acid. These old-fashioned samplers have a rudimentary structure, usually made of rolled carbon steel cylinders, with an acid discharge pipe connected to the bottom of the cylinder and placed in a fixed position for acid discharge after sampling.

[0003] However, this old-fashioned sampler has many drawbacks when used for fuming acid sampling. Firstly, when fuming acid is placed in the container, the sulfur trioxide easily escapes, forming acid fumes. This not only chokes operators, obstructs their vision, and increases the risk of acid burns, but also pollutes the surrounding environment. Secondly, the sampling container lacks a return acid pipe, making it prone to overflowing during sampling, which can cause injury and further pollute the environment. Furthermore, visits to fuming acid manufacturers have not yielded ideal solutions; most fuming acid producers still use this old-fashioned sampler, which poses safety hazards and causes environmental pollution. Therefore, developing a safe and environmentally friendly sampler suitable for fuming acid sampling is of significant practical importance.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] To address the aforementioned technical problem of inconvenient collection and treatment of sulfur trioxide overflow, the basic concept of this utility model is as follows:

[0006] A nicotinic acid sampler, comprising:

[0007] The shell is cylindrical, and a base plate is fixedly installed at the bottom of the shell;

[0008] The gas-liquid separation structure includes a gas separation section and a liquid separation section. The gas separation section includes a horizontal baffle fixedly installed on the inner wall of the shell, and a vertical baffle fixedly installed at the bottom of the horizontal baffle. A 70 mm gap is reserved between the bottom of the vertical baffle and the top of the bottom plate. The inner walls of the horizontal baffle and the vertical baffle together enclose the shell to form an acid mist collector. A hole is opened on one side of the outer wall of the shell, and an acid mist exhaust pipe is fixedly installed in the hole, which communicates with the acid mist collector. The liquid separation section includes a vertical baffle acid passage baffle set between the vertical baffle and the bottom plate. Three sets of vertical baffle acid passage channels are opened on one side of the outer wall of the vertical baffle acid passage baffle.

[0009] In a preferred embodiment of the present invention, the gas separation unit further includes an acid mist discharge valve disposed on the outer wall of the acid mist discharge pipe. The output end of the acid mist discharge valve is provided with an acid mist outlet. The vertical baffle divides the interior of the shell into a set of sample acid storage tanks and a set of sampling tanks. The sampling tanks and the acid mist discharge pipe are connected.

[0010] In a preferred embodiment of the present invention, the liquid separation unit further includes an acid drain pipe outside the shell. A hole is provided on one side of the outer wall of the shell, and one end of the acid drain pipe is fixedly installed in the hole. An acid drain valve is provided on the outer wall of the acid drain pipe.

[0011] In a preferred embodiment of this utility model, an opening is provided on one side of the outer wall of the shell, and an overflow acid pipe is fixedly installed in the opening. The sampling tank and the overflow acid pipe are connected. One end of the acid discharge pipe is fixedly installed inside the overflow acid pipe. An overflow acid valve is provided on the outer wall of the overflow acid pipe. The output end of the overflow acid valve is provided with an overflow and acid discharge pipe that leads to the acid storage tank.

[0012] In a preferred embodiment of the present invention, a large cover plate is fixedly installed on the top of the shell, and a hole is opened inside the large cover plate. A nicotinic acid delivery pipe is fixedly installed in the hole. A limiting groove is opened on the top of the cross baffle, and the nicotinic acid delivery pipe is sleeved inside the limiting groove.

[0013] In a preferred embodiment of this utility model, an acid inlet regulating valve is provided at one end of the nicotinic acid conveying pipe, a nicotinic acid inlet is provided at the input end of the nicotinic acid conveying pipe, and a valve flange is fixedly installed on the outer wall of the nicotinic acid conveying pipe.

[0014] In a preferred embodiment of this utility model, a small cover plate is provided on the top of the shell. The small cover plate is snapped into the gap between the shell and the large cover plate, and a movable handle is fixedly installed on the top of the small cover plate.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. To achieve the purpose of gas-liquid separation and collection of sample acid, to collect and purify the generated waste gas for recycling, to improve the sampling efficiency of the device, and to separate the raw materials by utilizing the different physical properties of gas and water droplets, namely that gas does not settle and water droplets do not follow the airflow but settle down when the flow speed is different, thereby reducing waste gas pollution.

[0017] 2. This technology achieves the goal of efficiently collecting and recycling excess nicotinic acid, thereby significantly improving nicotinic acid separation efficiency. In the gas distribution stage, a specific design allows the container to stably store a certain amount of gas over a specific time period. Specifically, the inlet gas is continuously input, while the outlet gas is temporarily suspended during certain periods. This ensures that the basic amount of gas stored in the container remains relatively stable. When two fans are operating, the gas volume within the container is in a relatively balanced state, effectively avoiding the airflow obstruction caused by the simultaneous operation of the two fans, thus reducing energy consumption. This technology has extremely high practicality and promotional value; it not only effectively solves problems in actual production but also brings significant economic benefits to enterprises, possessing extremely high economic value.

[0018] 3. To achieve the purpose of sealing and fixing the device, improve the sealing effect of the device, enhance the safety of the device, improve the stability of the device, and optimize the user experience of the device.

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1 This is a diagram of the internal structure of the present invention;

[0022] Figure 2 This is a top view of the large cover plate of this utility model;

[0023] Figure 3 This is a top view of the horizontal baffle of this utility model;

[0024] Figure 4 This is a front view of the vertical baffle acid flow baffle of this utility model;

[0025] Figure 5 This is an enlarged view of part A of the present invention;

[0026] Figure 6 This is an enlarged view of part B of this utility model.

[0027] In the diagram: 10. Shell; 11. Base plate; 12. Nicotinic acid inlet; 13. Acid inlet regulating valve; 14. Nicotinic acid delivery pipe; 15. Vertical baffle acid passage baffle; 16. Sample acid storage tank; 17. Limiting hole groove; 18. Sampling tank; 19. Overflow acid pipe; 20. Acid discharge pipe; 21. Acid discharge valve; 22. Overflow acid valve; 23. Overflow and acid discharge pipes all exiting the storage tank; 24. Acid mist collector; 25. Vertical baffle; 26. Horizontal baffle; 27. Acid mist discharge pipe; 28. Acid mist discharge valve; 29. ​​Acid mist outlet; 30. Large cover plate; 31. Small cover plate; 32. Movable handle; 33. Valve flange; 34. Vertical baffle acid passage. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0029] Example 1: A nicotinic acid sampler, specifically as follows Figure 1 and Figure 4 As shown, the system includes a housing 10, which is cylindrical in shape, with a base plate 11 fixedly installed at the bottom. It also includes a gas-liquid separation structure comprising a gas separation section and a liquid separation section. The gas separation section includes a horizontal baffle 26 fixedly installed on the inner wall of the housing 10, and a vertical baffle 25 fixedly installed at the bottom of the horizontal baffle 26. A 70mm gap is reserved between the bottom of the vertical baffle 25 and the top of the base plate 11. The inner walls of the horizontal baffle 26 and the vertical baffle 25 together enclose an acid mist collector 24 within the housing 10. A hole is provided on one outer wall of the housing 10, and an acid mist exhaust pipe 27 is fixedly installed within the hole, communicating with the acid mist collector 24. The liquid separation section includes a vertical baffle-to-acid baffle 15 positioned between the vertical baffle 25 and the base plate 11. Three sets of vertical baffle-to-acid channels 34 are provided on one outer wall of the vertical baffle-to-acid baffle 15. The fuming sulfuric acid sent from the acid plant is first introduced into the sample acid storage tank 16 inside the acid mist collector 24. The sample acid storage tank 16 is welded together from vertical baffles 25 and horizontal baffles 26. The sample acid enters the sampling tank 18 from the sample acid storage tank 16 shared by the acid mist collector 24 through the acid passage 34 of the vertical baffles. The sample acid sent from the acid plant enters the sample acid storage tank 16, which has a volume that can store 40 kg of fuming acid, fully meeting the sampling requirements.

[0030] Specifically, such as Figure 1 and Figure 5As shown, the gas separation unit also includes an acid mist discharge valve 28 installed on the outer wall of the acid mist discharge pipe 27. The output end of the acid mist discharge valve 28 has an acid mist outlet 29. A vertical baffle 25 divides the interior of the housing 10 into a set of sample acid storage tanks 16 and a set of sampling tanks 18, which are connected to the acid mist discharge pipe 20. During sampling, the acid mist discharge valve 28 is opened, and the acid mist passes through the acid mist discharge pipe 27 and the acid mist discharge valve 28 to the acid mist outlet 29 for purification and desulfurization treatment before being discharged in compliance with standards. The acid mist discharge pipe 27 and the acid mist discharge valve 28 are made of 316L stainless steel, and the acid mist discharge valve 28 is model DN80, PN1.0. The acid mist is transported from the acid mist outlet 29 to the secondary scrubber for acid production and purification. Using the negative pressure of the acid production and purification system, the acid mist is transported to the gas section after purification treatment, which is then sent to the deep desulfurization treatment area for discharge in compliance with standards. The sulfur trioxide portion is washed into the purified wastewater and sent to the wastewater treatment plant for treatment and reuse.

[0031] Specifically, such as Figure 1 As shown, the liquid separation unit also includes an acid drain pipe 20 outside the housing 10. A hole is provided on one side of the outer wall of the housing 10, and one end of the acid drain pipe 20 is fixedly installed in the hole. An acid drain valve 21 is provided on the outer wall of the acid drain pipe 20. After sampling, the fuming sulfuric acid in the sample acid storage tank 16 passes through the acid drain pipe 20 to the acid drain valve 21, enters the overflow acid valve 22, and then overflows and exits through the acid drain pipe into the acid storage tank 23.

[0032] Based on the above, the structure consisting of shell 10, bottom plate 11, vertical baffle acid passage baffle 15, sample acid storage tank 16, sampling tank 18, overflow acid pipe 19, discharge acid pipe 20, discharge acid valve 21, overflow acid valve 22, overflow and discharge acid pipes leading to the acid storage tank 23, acid mist collector 24, horizontal baffle 26, discharge acid mist pipe 27, discharge acid mist valve 28, acid mist outlet 29, and vertical baffle acid passage 34 achieves the purpose of gas-liquid separation and collection of sample acid, collects and purifies the generated waste gas for recycling, improves the sampling efficiency of the device, and utilizes the different physical properties of gas and water droplets—gas does not settle, while water droplets do not follow the airflow but settle down when the flow speed is different—to separate the raw materials into gas and liquid, reducing waste gas pollution.

[0033] Example 2: Based on Example 1, specifically as follows... Figure 1 As shown, an opening is provided on one side of the outer wall of the housing 10. An overflow acid pipe 19 is fixedly installed inside the opening. The sampling tank 18 and the overflow acid pipe 19 are connected. One end of the acid discharge pipe 20 is fixedly installed inside the overflow acid pipe 19. An overflow acid valve 22 is provided on the outer wall of the overflow acid pipe 19. The output end of the overflow acid valve 22 is provided with an overflow and discharge pipe that leads to the acid storage tank 23. In order to reduce the generation of more acid mist during sampling, more than 40 kg of nicotinic acid is passed through the overflow acid pipe 19 and then through the overflow acid valve 22 into the overflow and discharge pipe that leads to the acid storage tank 23.

[0034] Specifically, such as Figure 1 and Figure 3 As shown, a large cover plate 30 is fixedly installed on the top of the housing 10. The large cover plate 30 has openings inside, and a nicotinic acid delivery pipe 14 is fixedly installed within these openings. A limiting groove 17 is formed on the top of the transverse baffle 26, and the nicotinic acid delivery pipe 14 is fitted inside the limiting groove 17. The large cover plate 30 and the limiting groove 17 secure the nicotinic acid delivery pipe 14, providing sufficient support.

[0035] Specifically, such as Figure 1 and Figure 2 As shown, an acid inlet regulating valve 13 is provided at one end of the nicotinic acid delivery pipe 14, and a nicotinic acid inlet 12 is provided at the input end of the nicotinic acid delivery pipe 14. A valve flange 33 is fixedly installed on the outer wall of the nicotinic acid delivery pipe 14. Nicotinic acid is delivered to the interior of the housing 10 through the nicotinic acid inlet 12, and the nicotinic acid delivery pipe 14 is connected and fixed to the sampling fuming sulfuric acid pipe sent from the acid production plant through the valve flange 33.

[0036] Based on the above, the structure of the shell 10, nicotinic acid inlet 12, acid inlet regulating valve 13, nicotinic acid conveying pipe 14, sampling tank 18, overflow acid pipe 19, discharge acid pipe 20, overflow acid valve 22, overflow and discharge acid pipes leading to the acid storage tank 23, horizontal baffle 26, large cover plate 30, and valve flange 33 achieves the goal of efficient collection and circulation separation of excess nicotinic acid, thereby significantly improving the separation efficiency of nicotinic acid. In the gas distribution stage, a specific design allows the container to stably store a certain amount of gas within a certain time period. Specifically, the inlet gas is continuously input, while the outlet gas is temporarily suspended during specific periods, thus maintaining a relatively stable basic amount of gas stored in the container. When two blowers are operating, the gas volume in the container is in a relatively balanced state, effectively avoiding the airflow obstruction caused by the simultaneous operation of the two blowers, thereby reducing power consumption. This technology has extremely high practicality and promotional value, not only effectively solving problems in actual production but also bringing significant economic benefits to enterprises, thus possessing extremely high economic value.

[0037] Example 3: Based on Examples 1 and 2, specifically as follows... Figure 1 and Figure 6As shown, a small cover plate 31 is provided on the top of the shell 10. The small cover plate 31 is snapped into the gap between the shell 10 and the large cover plate 30. A movable handle 32 is fixedly installed on the top of the small cover plate 31. The sampler cover is divided into two semicircles, which are 400mm apart when closed. Both are made of 316L steel with a thickness of 10mm. The large cover plate 30 occupies most of the semicircle, with an arc length of 668mm and a chord length of 397mm. It is welded to the cylinder and its function is to ensure the strength of the device and support the weight of the nicotinic acid delivery pipe 14. It is also the connection point for the acid inlet pipe, through which the nicotinic acid for sampling enters. The maximum allowable Ra value of the interface between the large cover plate and the small cover plate is 1.6, requiring that there is no acid mist leakage when the cover is closed. The small cover plate 31 occupies a slightly smaller part of the circle, with an arc length of 586 and a chord length of 397. Both are made of 316L steel with a thickness of 10mm. The upper part of the sampling slot 18 is a movable cover. The surfaces where the two covers meet must be smooth and flat, with a maximum permissible Ra value of 1.6. The cover must be airtight when closed. The movable handle 32 is a movable handle on the small cover plate 31, which can rotate 180 degrees. It is designed for ease of use and is used to open the small cover plate 31 for sampling.

[0038] In summary, the structure of the large cover plate 30, the small cover plate 31, and the movable handle 32 achieves the purpose of sealing and fixing the device, improving the sealing effect of the device, enhancing the safety of the device, improving the stability of the device, and optimizing the user experience.

[0039] Working principle: Sampling fuming sulfuric acid from the acid plant enters the fuming sulfuric acid delivery pipe 14 through the fuming sulfuric acid inlet 12. One end of the fuming sulfuric acid delivery pipe 14 is equipped with an acid inlet regulating valve 13, and a valve flange 33 is fixed to the outer wall for connection and fixation with the sampling fuming sulfuric acid pipe. The fuming sulfuric acid delivery pipe 14 passes through the hole on the top cover plate 30 of the shell 10 and is fitted into the limiting groove 17 on the top of the horizontal baffle 26 for fixation and support. Finally, the fuming sulfuric acid enters the sample acid storage tank 16 inside the acid mist collector 24 (the sample acid storage tank 16 is welded from the vertical baffle 25 and the horizontal baffle 26, with a volume capable of storing 40 kg of fuming sulfuric acid to meet sampling requirements). In the gas separation section, the horizontal baffle 26 is fixed to the inner wall of the shell 10, and the vertical baffle 25 is fixed to its bottom. A 70 mm gap is reserved between the bottom of the vertical baffle 25 and the top of the bottom plate 11. The inner walls of the two baffles enclose the shell 10 to form the acid mist collector 24. An acid mist exhaust pipe 27 is fixed inside a hole on one side of the outer wall of the housing 10. The acid mist exhaust pipe 27 is connected to the acid mist collector 24, and an acid mist exhaust valve 28 is provided on its outer wall. The output end of the acid mist exhaust valve 28 has an acid mist outlet 29. During sampling, the acid mist exhaust valve 28 is opened, and the acid mist is discharged from the acid mist outlet 29 through the acid mist exhaust pipe 27 and the acid mist exhaust valve 28. It is then transported to the secondary scrubber for acid purification. The acid mist is transported for purification using the negative pressure of the acid purification system. After treatment, part of the gas is sent to the desulfurization deep treatment to meet the standards for discharge into the atmosphere, while part of the sulfur trioxide is washed into the purified wastewater and sent to the wastewater treatment plant for treatment and reuse. The acid mist discharge pipe 27 and acid mist discharge valve 28 are made of 316L stainless steel. The acid mist discharge valve 28 is model DN80, PN1.0. The vertical baffle 25 divides the interior of the shell 10 into a sample acid storage tank 16 and a sampling tank 18. The sampling tank 18 is connected to the acid discharge pipe 20. In terms of gas distribution, the above design maintains a relative balance of gas volume in the container. In the liquid separation section, the vertical baffle acid passage baffle 15 is set between the vertical baffle 25 and the bottom plate 11. Three sets of vertical baffle acid passages 34 are opened on one side of its outer wall. The sample acid enters the sampling tank 18 from the sample acid storage tank 16 through the vertical baffle acid passages 34. An acid discharge pipe 20 is provided on the outside of the shell 10, one end of which is fixed in a hole on one side of the outer wall of the shell 10. An acid discharge valve 21 is provided on the outer wall. An overflow acid pipe 19 is fixed inside an opening on one side of the outer wall of the shell 10. The sampling tank 18 is connected to the overflow acid pipe 19. One end of the discharge acid pipe 20 is fixed inside the overflow acid pipe 19. An overflow acid valve 22 is provided on the outer wall of the overflow acid pipe 19. The output end of the overflow acid valve 22 is connected to the overflow and discharge acid pipes and exits into the acid storage tank 23. After sampling, the fuming sulfuric acid in the sample acid storage tank 16 enters the overflow and discharge acid pipes and exits into the acid storage tank 23 through the discharge acid pipe 20, the discharge acid valve 21, and the overflow acid valve 22. To reduce acid mist generation during sampling, nicotinic acid exceeding 40 kg enters the overflow and discharge acid pipe 19 and exits into the acid storage tank 23 through the overflow acid pipe 19 and overflow acid valve 22. A large cover plate 30 is fixed to the top of the shell 10, with an arc length of 668 mm and a chord length of 397 mm. It is well welded to the cylinder and its function is to ensure the strength of the device, support the weight of the nicotinic acid delivery pipe 14, and serve as the connection point for the acid inlet pipeline. Sampling nicotinic acid is introduced through one end of the cover.The top of the housing 10 is also equipped with a small cover plate 31, which is snapped into the gap between the housing 10 and the large cover plate 30. Its arc length is 586 and chord length is 397. It is used above the sampling slot 18 and is a movable cover. The surfaces where the two covers meet must be smooth and flat, with a maximum allowable Ra value of 1.6, and must be airtight when closed. A movable handle 32 is fixed to the top of the small cover plate 31, which can rotate 180 degrees for easy opening of the small cover plate 31 during sampling. The maximum allowable Ra value of the interface between the large cover plate and the small cover plate is 1.6, requiring no acid mist leakage when the cover is closed. Both cover plates are made of 316L steel with a thickness of 10mm. The sampler's top cover is divided into two semicircles, with a closed diameter of 400mm.

[0040] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

Claims

1. A nicotinic acid sampler, characterized in that, include: The shell (10) is cylindrical, and a base plate (11) is fixedly installed at the bottom of the shell (10); The gas-liquid separation structure includes a gas separation section and a liquid separation section. The gas separation section includes a horizontal baffle (26) fixedly installed on the inner wall of the shell (10). A vertical baffle (25) is fixedly installed at the bottom of the horizontal baffle (26). A 70 mm gap is reserved between the bottom of the vertical baffle (25) and the top of the bottom plate (11). The inner walls of the horizontal baffle (26) and the vertical baffle (25) together enclose the shell (10) to form an acid mist collector (24). A hole is opened on one side of the outer wall of the shell (10). An acid mist discharge pipe (27) is fixedly installed in the hole. The acid mist discharge pipe (27) communicates with the acid mist collector (24). The liquid separation section includes a vertical baffle acid passage baffle (15) set between the vertical baffle (25) and the bottom plate (11). Three sets of vertical baffle acid passage channels (34) are opened on one side of the outer wall of the vertical baffle acid passage baffle (15).

2. The nicotinic acid sampler according to claim 1, characterized in that, The gas separation unit also includes an acid mist discharge valve (28) disposed on the outer wall of the acid mist discharge pipe (27). The output end of the acid mist discharge valve (28) is provided with an acid mist outlet (29). The vertical baffle (25) divides the interior of the shell (10) into a set of sample acid storage tanks (16) and a set of sampling tanks (18). The sampling tanks (18) and the acid mist discharge pipe (20) are connected.

3. The nicotinic acid sampler according to claim 1, characterized in that, The liquid separation unit also includes an acid drain pipe (20) outside the housing (10). A hole is provided on one side of the outer wall of the housing (10), and one end of the acid drain pipe (20) is fixedly installed in the hole. An acid drain valve (21) is provided on the outer wall of the acid drain pipe (20).

4. The nicotinic acid sampler according to claim 1, characterized in that, An opening is provided on one side of the outer wall of the housing (10), and an overflow acid pipe (19) is fixedly installed in the opening. The sampling tank (18) and the overflow acid pipe (19) are connected. One end of the acid discharge pipe (20) is fixedly installed inside the overflow acid pipe (19). An overflow acid valve (22) is provided on the outer wall of the overflow acid pipe (19). An overflow and acid discharge pipe is provided at the output end of the overflow acid valve (22) to discharge into the acid storage tank (23).

5. The nicotinic acid sampler according to claim 1, characterized in that, A large cover plate (30) is fixedly installed on the top of the housing (10). The large cover plate (30) has a hole inside, and a nicotinic acid delivery pipe (14) is fixedly installed inside the hole. A limiting groove (17) is opened on the top of the horizontal baffle (26), and the nicotinic acid delivery pipe (14) is sleeved inside the limiting groove (17).

6. The nicotinic acid sampler according to claim 5, characterized in that, A nicotinic acid delivery pipe (14) is provided with an acid inlet regulating valve (13) at one end, a nicotinic acid inlet (12) at the input end of the nicotinic acid delivery pipe (14), and a valve flange (33) is fixedly installed on the outer wall of the nicotinic acid delivery pipe (14).

7. The nicotinic acid sampler according to claim 1, characterized in that, The top of the housing (10) is provided with a small cover plate (31), which is snapped into the gap between the housing (10) and the large cover plate (30). A movable handle (32) is fixedly installed on the top of the small cover plate (31).

Images