Concentrated sulfuric acid sampling device

Abstract

The utility model belongs to the technical field of liquid sampling devices, and particularly relates to a concentrated sulfuric acid sampling device which comprises a sulfuric acid pipeline, the sulfuric acid pipeline is connected with a sampling pipe which is communicated with the sulfuric acid pipeline and extends downwards, a sampling valve is arranged on the sampling pipe, and a sampling cover is arranged outside the sampling pipe and the sampling valve. The sampling pipe and the sampling valve are located in a cavity defined by the sampling cover, a sampling window capable of being opened and closed is arranged on the side wall of the sampling cover, and a liquid drainage pipeline is arranged at the bottom of the sampling cover. During sampling, the sampling window is opened, the sampling bottle is placed under the liquid outlet of the sampling tube, and then the sampling valve is opened, so that a sulfuric acid solution can be discharged for sampling. The concentrated sulfuric acid sampling device disclosed by the utility model can reduce the discharge amount of a sulfuric acid solution during sampling, so that not only is resource waste reduced, but also the sampling accuracy is ensured; the sampling device is simple in structure, easy to operate and not prone to splashing to hurt people, harmful gas is not prone to overflowing, and sampling convenience and safety are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid sampling device technical field, concretely relates to a concentrated sulfuric acid sampling device. BACKGROUND

[0002] Concentrated sulfuric acid is a kind of active oil state colorless transparent binary inorganic strong acid, can react with most metals.High concentration sulfuric acid has strong water absorption, can be used as dehydrating agent, when mixing with water, also can emit a large amount of heat energy.Concentrated sulfuric acid is commonly used as chemical reagent, can be used as dehydrating agent and sulfonating agent in organic synthesis.

[0003] In chlor-alkali industry, concentrated sulfuric acid is usually used as dehydrating agent to adsorb moisture in chlorine gas, and in production process, the water content of concentrated sulfuric acid needs to be sampled and analyzed regularly, and the traditional sampling method is that sampling analysis worker holds sampling bottle to connect sulfuric acid solution from sampling pipe, and the following problems are prone to occur in sampling process:

[0004] First, sampling pipe is usually arranged at the end of sulfuric acid pipeline, and there is part of dead liquid not flowing at the end of pipeline, in order to ensure the accuracy of sampling analysis, the dead liquid needs to be discharged before sampling, and it is easy to cause splashing injury in discharging process, and the discharged sulfuric acid solution is not easy to recover, pollutes the environment, and there is a safety hazard.

[0005] Secondly, chlorine gas is resolved from sulfuric acid solution in the sampling process, and toxic gas leakage may cause poisoning and asphyxia of personnel.

[0006] Therefore, it is of great significance to design a concentrated sulfuric acid sampling device with simple operation, safety and high efficiency to improve sampling analysis accuracy, protect the safety of operating personnel and reduce environmental pollution. UTILITY MODEL CONTENT

[0007] The utility model aims at solving above-mentioned problem, provides a kind of concentrated sulfuric acid sampling device suitable for conveying concentrated sulfuric acid dehydrating agent in chlor-alkali industry, the sampling device can be arranged on sulfuric acid pipeline to facilitate sampling in any section, and the sampling can reduce the situation that sulfuric acid splashing harmful gas resolves and injures people.

[0008] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0009] A kind of stirring shaft sealing device, including sulfuric acid pipeline, its structural characteristics are as follows, the sulfuric acid pipeline is connected with downwardly extending sampling pipe, sampling valve is arranged on the sampling pipe, sampling cover is arranged outside the sampling pipe and sampling valve, the sampling pipe and sampling valve are located in the cavity formed by sampling cover surrounding, sampling window that can be opened and closed is arranged on the side wall of sampling cover, and liquid discharge pipeline is arranged at the bottom of sampling cover.

[0010] Further, the side wall of the sampling cover is provided with a first through hole and a second through hole, the sulfuric acid pipeline passes through the first through hole into the cavity inside the sampling cover and passes out from the second through hole, and the sampling tube is arranged on the sulfuric acid pipeline section between the first through hole and the second through hole.

[0011] Further, the cavity is provided with a support fixedly connected with the side wall of the sampling cover, and a rotatable sampling platform is arranged on the support.

[0012] Further, the sampling cover is connected with a vacuum pipeline.

[0013] Further, the top of the sampling cover is connected with a flushing pipeline for flushing the inner wall of the sampling cover.

[0014] Further, the water outlet of the flushing pipeline is connected with a nozzle.

[0015] After the above structure is adopted, the sampling tube is arranged on the sulfuric acid pipeline, the sulfuric acid solution in the pipeline keeps a flowing state and has no dead liquid, so that before sampling, only a small amount of stored liquid in the sampling tube needs to be discharged, and the sampling can be performed at any time, the amount of discharged liquid can be reduced, resource waste can be reduced, the sampling time can be shortened, and the accuracy of sampling analysis can be improved. The sampling cover is arranged outside the sampling tube and the sampling valve, the sampling environment is closed, splashing and personal injury are less likely to occur, and the safety of the sampler can be improved. The rotatable sampling platform is arranged below the sampling tube, before sampling, the sampling platform is rotated to be not directly below the liquid outlet of the sampling tube, at this time, the discharged stored liquid sulfuric acid cannot flow to the sampling platform, after the sampling valve is opened to discharge the stored liquid in the sampling tube, the sampling valve is closed, the sampling platform is rotated to be directly below the liquid outlet of the sampling tube, the sampling bottle is placed on the sampling platform, the bottle opening is directly opposite the liquid outlet of the sampling tube, and the sampling valve is opened to perform sampling; compared with the sampling mode of holding the sampling bottle by hand, the sampling mode of placing the sampling bottle on the sampling platform is simpler in operation and better in safety.

[0016] Compared with the prior art, the sampling device has the following beneficial effects.

[0017] The concentrated sulfuric acid sampling device can reduce the amount of discharged stored liquid during sampling, the sampling bottle is placed on the sampling platform during sampling, the bottle is not held by hand, splashing and personal injury are less likely to occur, the cavity of the sampling cover is in a micro-negative pressure state through the vacuum pipeline, harmful gas generated by the sampled sulfuric acid sample cannot overflow and injure people, the safety of the sampling process is improved, sampling is more convenient, and the sampling device is suitable for sampling of a concentrated sulfuric acid dehydration agent conveying pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 This is a schematic diagram of the concentrated sulfuric acid sampling device of this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of the concentrated sulfuric acid sampling device of this utility model;

[0020] Figure 1 In the middle: 1. Sampling hood; 2. Cavity; 3. Sampling window; 4. Sulfuric acid pipeline; 5. Sampling tube; 6. Sampling valve; 7. First through hole; 8. Second through hole; 9. Vacuum pumping pipeline; 10. Flushing pipeline; 11. Drainage pipeline; 12. Sampling platform; 13. Support. Detailed Implementation

[0021] To make the objectives, advantages, and features of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model.

[0022] Reference Figures 1-2 A concentrated sulfuric acid sampling device includes a sulfuric acid pipeline 4 and a sampling tube 5 connected to the sulfuric acid pipeline 4. The sampling tube 5 extends downward to allow the sampling solution to flow downward. A sampling valve 6 is provided on the sampling tube 5 to control the on / off state and flow rate of the sampling tube 5. A sampling hood 1 is provided outside the sampling tube 5 and the sampling valve 6. The sampling tube 5 and the sampling valve 6 are located within a sealed cavity 2 formed by the sampling hood 1, creating a sealed sampling environment. The sampling hood 1 can be a hollow cylindrical structure, or, depending on the actual situation, a hollow rectangle or other shapes. The sampling hood 1 is made of an acid-resistant material, such as fiberglass. Figures 1-2 As shown, the sulfuric acid pipe 4 passes through the upper part of the sampling hood 1, so that the front and rear sections of the connection between the sampling tube 5 and the sulfuric acid pipe 4 are located within the cavity 2 of the sampling hood 1. Specifically, a first through hole 7 and a second through hole 8 are opened on the side wall of the sampling hood 1. The first through hole 7 and the second through hole 8 are on the same plane and their axes are on the same straight line. The sulfuric acid pipe 4 passes through the first through hole 7 into the cavity 2 inside the sampling hood 1, and then passes through the second through hole 8 to exit. Then, the connection between the through hole and the sulfuric acid pipe 4 is sealed. The sampling tube 5 and the sampling... The sampling valve 6 is located on the sulfuric acid pipeline 4 section between the first through hole 7 and the second through hole 8. The sampling hood 1 may not enclose the sulfuric acid pipeline 4. A sampling window 3 that can be opened and closed is provided on the side wall of the sampling hood 1. During sampling, the sampling bottle is placed and removed, and the sampling valve 6 is opened and closed through the sampling window 3. The sampling bottle is not part of the sampling device and is not shown in the figure. A drain line 11 is provided at the bottom of the sampling hood 1. The liquid released from the sampling tube 5 is discharged through the drain line 11. A control valve can be installed on the drain line 11.

[0023] With reference to Figures 1-2 , the cavity 2 of the sampling cover 1 is provided with a support 13, the support 13 is fixedly connected with the side wall of the sampling cover 1, and a rotatable sampling platform 12 is installed on the support 13. The sampling platform 12 is rotated to be directly below the liquid outlet of the sampling tube 5 or not directly below the liquid outlet of the sampling tube 5. Before sampling, the sampling platform 12 is rotated to be not directly below the liquid outlet of the sampling tube 5, so that the liquid in the sampling tube 5 will not flow onto the sampling platform 12 when the liquid is discharged. After the liquid is discharged, the sampling platform 12 is rotated to be directly below the liquid outlet of the sampling tube 5. The sampling bottle is placed on the sampling platform 12 and directly below the liquid outlet of the sampling tube 5. During sampling, the sampling bottle does not need to be held by hand, which prevents the sulfuric acid liquid from splashing and causing harm to the human body. Specifically, the sampling platform 12 can be horizontally rotated, and the supporting surface of the sampling platform 12 is in a horizontal state during rotation. Specifically, a bearing can be arranged at the connection part of the sampling platform 12 and the support 13 to enable the sampling platform 12 to rotate. The sampling platform 12 can also be vertically rotated to make the supporting surface of the sampling platform 12 horizontal or inclined. Specifically, a shaft can be arranged on the sampling platform 12, a shaft hole is arranged on the support 13, the shaft is inserted into the shaft hole, and the shaft and the sampling platform 12 are fixed by means of a bolt or other means. Of course, other means can also be used to rotate the sampling platform 12.

[0024] With reference to Figures 1-2 , the sampling cover 1 is connected with a vacuum extraction pipeline 9, the vacuum extraction pipeline 9 is provided with a vacuum extraction device (not shown in the figure), the vacuum extraction pipeline 9 enables the sampling cover 1 to be in a micro-negative pressure state, and the harmful gas generated by the sulfuric acid is extracted to prevent the harmful gas from overflowing and causing harm to the sampling workers. The top of the sampling cover 1 is connected with a flushing pipeline 10, the flushing pipeline 10 sprays water into the sampling cover 1 to clean the residual sulfuric acid on the inner wall of the sampling cover 1. A control valve (not shown in the figure) is arranged on the flushing pipeline 10. In order to spray water more uniformly and achieve better flushing effect, a nozzle is connected with the water outlet of the flushing pipeline 10. The nozzle can be a fan-shaped nozzle, and the water is sprayed to the periphery.

[0025] Method for use: when sampling, first open the sampling window 3 on the side wall of the sampling cover 1, rotate or translate the sampling platform 12 to the inclined direction or to the outside of the liquid outlet of the sampling tube 5, open the sampling valve 6, and then empty the liquid in the sampling tube 5, then rotate the sampling platform 12 to the horizontal direction or translate it to the liquid outlet of the sampling tube 5, place the sampling bottle on the sampling platform 12, with the bottle opening of the sampling bottle facing the sampling tube 5, open the sampling valve 6, and then the sulfuric acid solution flows into the sampling bottle, after the sampling bottle is filled, close the sampling valve 6, take out the sampling bottle, rotate the sampling platform 12 to the inclined direction or translate it to the liquid outlet of the sampling tube 5, close the sampling window 3, open the flushing pipeline 10 and the liquid discharge pipeline 11, and flush the residual liquid in the sampling cover 1, so that the sampling bottle is not needed to be held by hand during sampling, and the sulfuric acid liquid is prevented from splashing to cause personal injury. During the sampling process, the vacuum pipeline 9 is opened, so that the sampling cover 1 is in a micro-negative pressure state, harmful gas generated after the sulfuric acid is discharged is extracted, and the harmful gas cannot overflow to endanger the sampler.

[0026] The concentrated sulfuric acid sampling device can reduce the liquid discharge amount of the sulfuric acid solution during sampling, reduce resource waste, ensure sampling accuracy, is simple to operate, is not easy to cause splashing injury, no toxic and harmful gas overflows, and improves sampling convenience and safety.

[0027] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The basic principle, main features and advantages of the present application have been shown and described. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

[0029] The basic principle, main features and advantages of the present application have been shown and described. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A concentrated sulfuric acid sampling device comprising a sulfuric acid conduit (4), characterized in that, The sulfuric acid pipeline (4) is connected with a downward extending sampling pipe (5), the sampling pipe (5) is provided with a sampling valve (6), the outside of the sampling pipe (5) and the sampling valve (6) is provided with a sampling cover (1), the sampling pipe (5) and the sampling valve (6) are located in the cavity (2) formed by the sampling cover (1), the side wall of the sampling cover (1) is provided with an openable and closable sampling window (3), and the bottom of the sampling cover (1) is provided with a liquid discharge pipeline (11).

2. The concentrated sulfuric acid sampling device of claim 1, wherein, The side wall of the sampling cover (1) is provided with a first through hole (7) and a second through hole (8), the sulfuric acid pipeline (4) passes through the first through hole (7) into the cavity (2) inside the sampling cover (1) and passes out from the second through hole (8), and the sampling pipe (5) is arranged on the sulfuric acid pipeline (4) section between the first through hole (7) and the second through hole (8).

3. The concentrated sulfuric acid sampling device of claim 1, wherein, The cavity (2) is provided with a support (13) fixedly connected with the side wall of the sampling cover (1), and a rotatable sampling platform (12) is installed on the support (13), rotating the sampling platform (12) makes the sampling platform (12) be located directly below or not be located directly below the liquid outlet of the sampling pipe (5).

4. The concentrated sulfuric acid sampling device of claim 1, wherein, The sampling cover (1) is connected with a vacuum pipeline (9).

5. The concentrated sulfuric acid sampling device of claim 1, wherein, The top of the sampling cover (1) is connected with a flushing pipeline (10) for flushing the inner wall of the sampling cover (1).

6. The concentrated sulfuric acid sampling device of claim 5, wherein, The water outlet of the flushing pipeline (10) is connected with a nozzle.

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