Pipeline sampling device for carbon dioxide production line

Abstract

The utility model relates to the technical field of chemical engineering, in particular to a carbon dioxide production line pipeline sampling device which comprises a main pipeline, a first branch pipe and a second branch pipe are axially arranged on the main pipeline, two ends of a sampling bottle are respectively communicated with the two branch pipes through a first valve and a second valve, and the sampling bottle is provided with an exhaust pipe with a third valve. In a normal state, the first valve and the second valve are closed, safety is guaranteed, and accidental leakage of high-pressure gas is avoided. During sampling, the first valve is firstly opened to make the pressure of the sampling bottle consistent with that of the main pipeline, then the second valve is opened to divert gas to the sampling bottle, and after a period of time, the first two valves are sequentially closed, and the third valve is opened to collect sample gas. According to the structural design, the pressure is balanced firstly, and then shunting sampling is performed, so that the collected sample can truly reflect the gas state and components of the main pipeline, the sample deviation is reduced, the sampling accuracy is improved, and the risk of safety accidents caused by misoperation is reduced by a standard valve operation sequence.

Description

TECHNICAL FIELD

[0001] The utility model relates to a chemical industry field, specifically, a kind of carbon dioxide production line pipeline sampling device. BACKGROUND

[0002] Carbon dioxide is a greenhouse gas, and a large amount of it is present in the tail gas of the coal chemical industry. Direct emission can cause the greenhouse effect. Carbon dioxide has a wide range of applications. In the industrial field, carbon dioxide is used as a welding shielding gas, a metal processing aid, a chemical raw material, and also for water treatment. In the food and beverage industry, it is used as a carbonated beverage additive, for preservation and storage, and for processing. In the agricultural field, it can be used as a gas fertilizer and for grain storage. In the medical field, it is used as a respiratory stimulant and for medical equipment. In the environmental protection field, it is used as an aerosol propellant and helps to reduce greenhouse gas emissions. In addition, it also has a wide range of applications in firefighting, electronics industry, scientific research and other fields.

[0003] In the production process of the coal chemical industry, the waste gas produced contains a high content of carbon dioxide, which makes it an excellent raw material for carbon dioxide production. Carbon dioxide purification production equipment connects devices through a pipeline system and completes gas transportation. In the production process, to ensure the quality of carbon dioxide production, sampling detection or sampling storage is usually carried out at key processes in the pipeline system. However, due to the high pressure in the pipeline system, if only a valve is used at the sampling point for sampling operation, there may be safety hazards. SUMMARY

[0004] The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the present utility model provides a carbon dioxide production line pipeline sampling device, which is stable, safe and easy to use.

[0005] According to the carbon dioxide production line pipeline sampling device of the present utility model, it comprises:

[0006] A main pipeline is provided with a first branch pipe and a second branch pipe along the axial direction, and the axes of the first branch pipe and the second branch pipe are perpendicular to the axis of the main pipeline.

[0007] A sampling assembly is provided with a sampling bottle, one end of which is connected to the first branch pipe through a first valve, and the other end of which is connected to the second branch pipe through a second valve. An exhaust pipe is provided on the sampling bottle, and a third valve is provided on the exhaust pipe.

[0008] According to some embodiments of the present utility model, the cross-sectional diameter of the sampling bottle is greater than the cross-sectional diameter of the first branch pipe or the second branch pipe.

[0009] According to some embodiments of the present utility model, a pressure relief valve is provided on the sampling bottle.

[0010] According to some embodiments of the present application, a first pressure gauge is arranged on the sampling bottle.

[0011] According to some embodiments of the present application, a second pressure gauge is arranged on the main pipeline between the first branch pipeline and the second branch pipeline.

[0012] According to some embodiments of the present application, a buffer pipeline is arranged between the second pressure gauge and the main pipeline in a ring shape.

[0013] According to some embodiments of the present application, a temperature gauge is arranged on the sampling bottle.

[0014] According to some embodiments of the present application, the third valve is a vacuum diaphragm valve.

[0015] The carbon dioxide production line pipeline sampling device according to the embodiments of the present application has at least the following advantages

[0016] Advantages:

[0017] According to the scheme of the present application, the carbon dioxide production line pipeline sampling device comprises a main pipeline, the main pipeline is provided with a first branch pipeline and a second branch pipeline along an axial direction, the axial lines of the first branch pipeline and the second branch pipeline are perpendicular to the axial line of the main pipeline; a sampling assembly is provided with a sampling bottle, one end of the sampling bottle is communicated with the first branch pipeline through a first valve, the other end of the sampling bottle is communicated with the second branch pipeline through a second valve; an exhaust pipeline is arranged on the sampling bottle, and a third valve is arranged on the exhaust pipeline. In a normal state, the first valve and the second valve are both in a closed state; when sampling is performed, the first valve is first opened until the pressure in the sampling bottle is consistent with the pressure in the main pipeline, then the second valve is opened, so that the gas in the main pipeline is shunted through the sampling bottle, after a period of time, the first valve and the second valve are closed in turn, the third valve is opened, and the sample gas is collected through the exhaust pipeline. Through the design of the structure, the sampling bottle pressure is first made consistent with the main pipeline pressure, and then the gas shunting sampling mode is performed, which can effectively ensure that the collected gas sample truly reflects the state and composition of the gas in the main pipeline, reduces the sample deviation caused by factors such as pressure difference, and improves the accuracy of sampling. In a normal state, the first valve and the second valve are closed, which avoids the safety risk caused by accidental leakage of high-pressure gas in the pipeline. Moreover, the entire sampling process gradually operates the valves in a certain order, which reduces the possibility of safety accidents caused by improper operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 Fig. 1 is a structural schematic view of the present application;

[0019] Fig. 2 Fig. 2 is a structural schematic view of the present application.

[0020] Fig.:

[0021] 100 - main pipe, 110 - first branch pipe, 120 - second branch pipe, 130 - first valve, 140 - second valve, 150 - second pressure gauge, 151 - buffer pipe;

[0022] 200 - sampling assembly, 210 - sampling bottle, 211 - exhaust pipe, 220 - third valve, 230 - pressure relief valve, 240 - first pressure gauge, 250 - temperature gauge. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In the description of the present application, the plural refers to two or more. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the sequence of technical features indicated.

[0026] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0027] Referring to Figs. 1-2The utility model discloses a carbon dioxide production line pipeline sampling device, including main pipeline 100 and sampling assembly 200. In this embodiment, main pipeline 100 can adopt the existing pipeline system to be reformed, also can adopt the new pipeline to replace the original pipeline. Main pipeline 100 as the part of the existing pipeline system, directly participate in the delivery of carbon dioxide gas. Main pipeline 100 is provided with first branch pipe 110 and second branch pipe 120 along the axis, and the axis of first branch pipe 110 and second branch pipe 120 and the axis of main pipeline 100 are perpendicular, sampling bottle 210 is provided with sampling assembly 200, and one end of sampling bottle 210 is connected with first branch pipe 110 through first valve 130, and the other end of sampling bottle 210 is connected with second branch pipe 120 through second valve 140, and exhaust pipe 211 is arranged on sampling bottle 210, and third valve 220 is arranged on exhaust pipe 211. Under normal circumstances, first valve 130 and second valve 140 are all in the closed state, and the passage between sampling bottle 210 and main pipeline 100 is blocked at this time, and the gas in main pipeline 100 flows normally and is not affected by the device. When sampling, first valve 130 is opened first. Because there is pressure in main pipeline 100, the gas starts to enter sampling bottle 210, and as the gas continuously enters, the pressure in sampling bottle 210 gradually rises until the pressure in sampling bottle 210 is consistent with the pressure in main pipeline 100. This process is to make the internal pressure environment of sampling bottle 210 same as main pipeline 100, to avoid interference to the gas sample during subsequent sampling due to the excessively large pressure difference. After the pressure in sampling bottle 210 is consistent with the pressure in main pipeline 100, second valve 140 is opened. At this time, part of the gas in main pipeline 100 will be shunted through sampling bottle 210, because the gas in main pipeline 100 has pressure and is in a flowing state, under the action of pressure, the gas flows into sampling bottle 210 from first branch pipe 110, and then flows back to main pipeline 100 from sampling bottle 210 through second branch pipe 120, forming a short gas flow path, lasting for a period of time, so that sampling bottle 210 is filled with the gas sample in main pipeline 100. After sampling is completed, first valve 130 and second valve 140 are closed in turn, and the connection between sampling bottle 210 and main pipeline 100 is blocked again. Then third valve 220 is opened, and the sample gas is collected through exhaust pipe 211, and the sample collected in sampling bottle 210, which conforms to the characteristics of the gas in main pipeline 100, is taken out for subsequent detection and analysis. By making the pressure in sampling bottle 210 consistent with the pressure in main pipeline 100 first, and then shunting the gas for sampling, the gas sample collected can effectively reflect the state and composition of the gas in main pipeline 100, the sample deviation caused by factors such as pressure difference is reduced, and the accuracy of sampling is improved. Under normal circumstances, first valve 130 and second valve 140 are closed, and the safety risk caused by accidental leakage of high-pressure gas in the pipeline is avoided. Moreover, the valves are operated gradually in a certain order during the whole sampling process, and the possibility of safety accidents caused by improper operation is reduced.When the axes of the first branch pipe 110 and the second branch pipe 120 are perpendicular to the axis of the main pipe 100, the carbon dioxide gas in the main pipe 100 changes the flow direction by 90 degrees when flowing to the branch pipes. This layout utilizes the inertia and momentum principle of fluid. The gas flowing at high speed in the main pipe 100 has a certain momentum, and the perpendicular connection mode makes the pressure distribution at the inlet of the branch pipe relatively uniform, which is beneficial to the smooth flow of the gas from the main pipe to the branch pipe, and reduces the pressure sudden change and gas flow disorder caused by improper connection mode.

[0028] In some embodiments of the present application, the cross-sectional diameter of the sampling bottle 210 is greater than the cross-sectional diameter of the first branch pipe 110 or the second branch pipe 120. Specifically, in the present embodiment, the cross-sectional diameter of the sampling bottle 210 is greater than the cross-sectional diameter of the first branch pipe 110 or the second branch pipe 120. When the first valve 130 is opened to balance the pressure of the sampling bottle 210 with the pressure of the main pipe 100, due to the larger cross-sectional area of the sampling bottle 210, according to the flow formula, flow rate*cross-sectional area, under the same pressure driving, the gas flow rate flowing into the sampling bottle 210 is relatively slow, which helps to smoothly increase the pressure in the sampling bottle 210 and avoid too large pressure change to disturb the gas flow state in the main pipe 100. During the gas sampling stage of opening the second valve 140, the larger diameter of the sampling bottle 210 can provide more space to accommodate the diverted gas, slow down the flow speed of the gas in the sampling bottle 210, and allow the gas to have more mixing time in the sampling bottle 210, thereby ensuring that the collected gas sample is more uniform.

[0029] In some embodiments of the present application, a pressure relief valve 230 is arranged on the sampling bottle 210. Specifically, in the present embodiment, by means of the pressure relief valve 230, the pressure value in the sampling bottle 210 can be controlled during sampling, preventing the sampling bottle 210 from being damaged or even dangerous due to excessive pressure. The sampling bottle 210 faces the potential risk of out-of-control pressure during the sampling process of connecting with the high-pressure main pipe 100. The pressure relief valve 230 can timely release the excessive pressure, effectively avoid serious safety accidents such as rupture and explosion of the sampling bottle 210 due to overpressure, and protect the personal safety of the operator and the safety of the surrounding equipment and facilities.

[0030] In some embodiments of the present application, a first pressure gauge 240 is arranged on the sampling bottle 210. Specifically, in the present embodiment, by arranging the first pressure gauge 240, the pressure state in the sampling bottle 210 can be monitored in real time.

[0031] In some embodiments of the utility model, second pressure table 150 is established between first branch pipe 110 and second branch pipe 120 on main pipe 100. Specifically, in this embodiment, second pressure table 150 is installed between first branch pipe 110 and second branch pipe 120 on main pipe 100, and its working principle is based on pressure sensing technology. It can sense the pressure of the gas in the position of main pipe 100 in real time and convert the pressure signal into readable numerical value. In the whole sampling process, the pressure in main pipe 100 is an important parameter, and second pressure table 150 can continuously monitor the pressure change of the section of main pipe 100. During the sampling operation, when opening first valve 130 to balance the pressure of sampling bottle 210 with main pipe 100 and opening second valve 140 to carry out gas diversion sampling, the pressure in main pipe 100 may change due to the flow and distribution of gas, and second pressure table 150 can timely capture these pressure change information to provide intuitive data reference for the operator. In this embodiment, the operator can determine the pressure state in sampling bottle 210 by comparing the numerical value of first pressure table 240 and second pressure table 150. When opening first valve 130 to balance the pressure of sampling bottle 210 with main pipe 100 in the sampling preparation stage, according to the reading of first pressure table 240, it can be accurately judged whether the pressure in sampling bottle 210 has reached the same level as main pipe 100, to ensure that the subsequent sampling operation is carried out under appropriate pressure conditions, and to improve the accuracy and reliability of sampling.

[0032] In some embodiments of the utility model, buffer pipe 151 is annularly arranged between second pressure table 150 and main pipe 100. Specifically, in this embodiment, buffer pipe 151 is annularly arranged between second pressure table 150 and main pipe 100, and its principle is mainly based on the application of fluid dynamics and pressure fluctuation characteristics. When the gas in main pipe 100 flows, pressure fluctuation will inevitably occur, which may exist in the form of pulse or high-frequency vibration. The annular buffer pipe 151 has a certain volume and length, when the gas with pressure fluctuation enters the buffer pipe 151, due to the special structure of the buffer pipe 151, the gas will experience changes in path and adjustment of speed when flowing in it. Buffer pipe 151 can temporarily accommodate excess gas to relieve the sharp rise of pressure; when the pressure of main pipe 100 drops, the gas stored in buffer pipe 151 can also be supplemented, to stabilize the pressure. In this way, after the adjustment of buffer pipe 151, the gas pressure transmitted to second pressure table 150 is more stable, reducing the interference of pressure fluctuation on the reading of pressure table.

[0033] In some embodiments of the utility model, temperature table 250 is arranged on sampling bottle 210. Specifically, in this embodiment, temperature table 250 is arranged on sampling bottle 210 to monitor the temperature state in sampling bottle 210.

[0034] In some embodiments of the present application, the third valve 220 is a vacuum diaphragm valve. Specifically, in the present embodiment, the vacuum diaphragm valve is suitable for carbon dioxide sampling work under various pressure and temperature conditions. Whether in a high-pressure or low-pressure environment, or in different temperature ranges, it can maintain good performance and work stably and reliably. The diaphragm of the vacuum diaphragm valve can tightly fit the valve seat, providing excellent sealing performance. This feature is particularly important during carbon dioxide sampling. It can effectively prevent the leakage of carbon dioxide gas in the sampling bottle 210, ensure that the collected sample is not contaminated by external air, and ensure the purity and accuracy of the sample, providing a reliable foundation for subsequent accurate component analysis and quality detection.

[0035] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present application.

Claims

1. A carbon dioxide production line pipe sampling device, characterized by, The utility model relates to a kind of sampling device, including: Main pipe (100), the first branch pipe (110) and the second branch pipe (120) are arranged axially to the main pipe (100), the axis of the first branch pipe (110) and the second branch pipe (120) and the axis of the main pipe (100) are perpendicular; Sampling assembly (200) is provided with sampling bottle (210), one end of the sampling bottle (210) is communicated first branch pipe (110) by first valve (130), the other end of the sampling bottle (210) is communicated the second branch pipe (120) by second valve (140);Sampling bottle (210) is provided with exhaust pipe (211), and third valve (220) is provided on the exhaust pipe (211).

2. The carbon dioxide production line pipe sampling device of claim 1, wherein, The cross-sectional diameter of the sampling bottle (210) is greater than the cross-sectional diameter of the first branch pipe (110) or the second branch pipe (120).

3. The carbon dioxide production line pipe sampling device of claim 2, wherein, Pressure relief valve (230) is provided on the sampling bottle (210).

4. The carbon dioxide production line pipe sampling device of claim 3, wherein, First pressure gauge (240) is provided on the sampling bottle (210).

5. The carbon dioxide production line pipe sampling device of claim 4, wherein, Second pressure gauge (150) is provided on the main pipe (100) between the first branch pipe (110) and the second branch pipe (120).

6. The carbon dioxide production line pipe sampling device of claim 5, wherein, Buffer tube (151) is provided between the second pressure gauge (150) and the main pipe (100) in the form of annular winding.

7. The carbon dioxide production line pipe sampling device of claim 1, wherein, Temperature gauge (250) is provided on the sampling bottle (210).

8. The carbon dioxide production line pipe sampling device of claim 1, wherein, The third valve (220) is a vacuum diaphragm valve.

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