Closed sampling device for coal gas
By designing a gas sampling device with a sealed chamber and a heating device, the problems of leakage and temperature change during the gas sampling process were solved, achieving the sealing and accuracy of the sampling, and ensuring the safety and purity of the sampling process.
Patent Information
- Application Number
- CN202520046402.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-01-09
AI Technical Summary
Gas sampling can lead to gas leaks, environmental pollution, and affect the purity of samples and the accuracy of analytical results. Furthermore, temperature changes can cause water vapor to condense and freeze, damaging the equipment.
A gas sampling device was designed, comprising a sealed chamber, a heating device, and a filtering device. The sealed chamber maintains the airtightness of the sampling process, the heating device regulates the temperature, and the filtering device removes solid impurities, ensuring the safety and accuracy of the sampling process.
It achieves sealing and temperature control of gas sampling, prevents leakage and water vapor condensation, improves sampling purity and accuracy of analysis results, and ensures the safety and reliability of sampling.
Smart Images
Figure CN223955226U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of gas sampling technology, and in particular relates to a closed gas sampling device. Background Technology
[0002] Gas sampling is used in enterprise production processes and is an important part of gas product quality supervision. Before taking representative samples, sampling equipment and other materials must be thoroughly replaced and cleaned. Gas leakage may occur during cleaning and replacement. Furthermore, due to the complex composition of gas, it can easily pollute the air environment and endanger human health.
[0003] Because coal gas contains moisture and solid impurities, direct sampling can easily lead to sample contamination, affecting the accuracy of analytical results. Secondly, during coal gas sampling, changes in ambient temperature can cause water vapor in the gas to condense or even freeze, which not only affects sample stability but may also damage the sampling equipment. Summary of the Invention
[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a closed gas sampling device, which improves the purity, accuracy and reliability of gas sampling by filtering and heating the gas.
[0005] Technical solution: To achieve the above objectives, the present invention provides a gas sealed sampling device, comprising a gas pipe and a sampling pipe installed in a sealed chamber, wherein the outlet of the gas pipe is located outside the sealed chamber, and the sampling bottle is connected to the gas pipe through the sampling pipe.
[0006] Includes a heat tracing device, through which the temperature of the sealed chamber is regulated;
[0007] It also includes a filter device installed near the inlet of the gas pipe to filter out solid impurities contained in the gas entering the gas pipe.
[0008] Furthermore, the heat tracing device includes a heat source circulation pipe with its body located inside a sealed chamber and its outlet located outside the sealed chamber, and a heat exchange medium is circulated inside the heat source circulation pipe.
[0009] Furthermore, the sealed chamber has a nitrogen pipe equipped with a nitrogen valve, and nitrogen gas is introduced into the sealed chamber through the nitrogen pipe to form a nitrogen atmosphere, and the heat exchange medium exchanges heat with the nitrogen atmosphere.
[0010] Furthermore, the gas pipe is provided with an inlet valve, a bulb sampling inlet valve, a return valve, and a bulb sampling outlet valve in sequence along the gas flow direction; the sampling tube is connected to the bulb sampling inlet valve and the bulb sampling outlet valve; the filter device is located between the gas pipe inlet and the inlet valve.
[0011] Furthermore, a pressure gauge is installed on the gas pipe between the spherical sampling inlet valve and the return sampling valve.
[0012] Furthermore, a purge pipe is connected to the gas pipe between the filter device and the injection valve. A purge valve is installed on the purge pipe. The purge pipe has two outlets, one of which is a forward purge end in the same direction as the gas injection direction, and the other is a reverse purge end in the opposite direction to the gas injection direction. The reverse purge end backflushes the filter device.
[0013] Furthermore, the filtration device is a gas filter equipped with a filter screen or filter media. Solid impurities accumulated on the filter screen or filter media are backflushed through the backflushing gas purging end and discharged through the inlet of the gas pipe.
[0014] Beneficial effects: The sealed chamber design of this utility model ensures the airtightness of the gas sampling process and prevents gas leakage. At the same time, the heating device regulates the indoor temperature through the circulating heat exchange medium to avoid water vapor condensation or freezing in the gas, thus ensuring sample stability. The filtration device effectively removes solid impurities from the gas, ensuring the purity of the sample, improving the accuracy of the analysis results, and guaranteeing the safety, accuracy, and reliability of gas sampling. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the connection between the purging pipe and the gas pipe. Detailed Implementation
[0017] The present invention will be further described below with reference to the accompanying drawings.
[0018] like Figure 1 As shown, a closed-loop gas sampling device includes a gas pipe 2 and a sampling pipe 3 disposed within a sealed chamber 1. The inlet of the gas pipe 2 is located outside the sealed chamber 1, and a sampling bottle 4 is connected to the gas pipe 2 via the sampling pipe 3. The device also includes a heating device 5, which regulates the temperature of the sealed chamber 1. A filter device 6 is installed near the inlet of the gas pipe 2 to filter solid impurities contained in the gas entering the gas pipe 2. The design of the sealed chamber 1 ensures airtightness during gas sampling, preventing gas leakage. Simultaneously, the heating device 5 regulates the temperature of the chamber through a circulating heat exchange medium, preventing water vapor condensation or freezing in the gas and ensuring sample stability. The filter device 6 effectively removes solid impurities from the gas, ensuring the purity of the sample, improving the accuracy of the analytical results, and guaranteeing the safety, accuracy, and reliability of gas sampling.
[0019] The heat tracing device 5 comprises a heat source circulating pipe 51 with the pipe body located in the closed chamber 1 and the pipe mouth located outside the closed chamber 1, and a heat exchange medium is circulated in the heat source circulating pipe 51. Through the circulation of the heat exchange medium, the temperature of the closed chamber 1 is effectively controlled, the condensation or icing of water vapor in the coal gas due to temperature change is prevented, and the accuracy and reliability of the sampling are ensured.
[0020] The closed chamber 1 is provided with a nitrogen pipe 8 with a nitrogen valve 7, nitrogen is introduced into the closed chamber 1 through the nitrogen pipe 8 to form a nitrogen atmosphere, the heat exchange medium exchanges heat with the nitrogen atmosphere, and the inert properties of nitrogen are utilized to prevent chemical reactions such as combustion and explosion of the coal gas in the closed chamber 1, and the safety and stability of the sample are improved through heat exchange.
[0021] The coal gas pipe 2 is sequentially provided with a sampling valve 9, a ball bladder sampling inlet valve 10, a return valve 11 and a ball bladder sampling outlet valve 12 along the coal gas flow direction; the sampling pipe 3 is connected to the ball bladder sampling inlet valve 10 and the ball bladder sampling outlet valve 12; and the filtering device 6 is located between the sampling inlet of the coal gas pipe 2 and the sampling valve 9. Through accurate control of the coal gas flow, effective coal gas sample collection is realized, and the position of the filtering device 6 ensures that the coal gas is purified before entering the system, thereby improving the purity of the sample.
[0022] The coal gas pipe 2 is provided with a pressure gauge 13 located between the ball bladder sampling inlet valve 10 and the return valve 11, which can monitor the pressure change in the coal gas pipe 2 in real time, thereby ensuring the safety of the sampling process.
[0023] As shown in Figure 1 and Figure 2 The coal gas pipe 2 is provided with a purge pipe 14 located between the filtering device 6 and the sampling valve 9, the purge pipe 14 is provided with a purge valve 15, and the gas outlet end of the purge pipe 14 has two gas outlet ends, one of which is a positive purge end 14a in the same direction as the coal gas sampling direction, and the other is a reverse purge end 14b opposite to the coal gas sampling direction, and the reverse purge end 14b purges the filtering device 6. Through the purge operation, the impurities and residual coal gas in the pipeline can be removed, and the design of the positive purge and the reverse purge not only improves the cleaning efficiency, but also cleans the filtering device 6, prolongs the service life, and ensures the smoothness of the pipeline and the purity of the sample.
[0024] More specifically, as a preferred embodiment, the filtering device 6 is a gas filter provided with a filter screen or filter filler, and the solid impurities accumulated on the filter screen or filter filler are purged through the reverse purge end 14b to be discharged through the sampling inlet of the coal gas pipe 2, thereby avoiding the clogging of the filtering device 6 and maintaining the effective operation of the sampling system.
[0025] The above merely is the preferred implementation form of the present application, and it should be noted that for the ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.
Claims
1. A gas closed sampling device, comprising a gas pipe (2) and a sampling pipe (3) disposed in a closed chamber (1), wherein the opening of the gas pipe (2) is located outside the closed chamber (1), and a sampling bottle (4) is connected to the gas pipe (2) through the sampling pipe (3). Its features are: Includes a heat tracing device (5), through which the sealed chamber (1) regulates the indoor temperature; It also includes a filter device (6), which is installed near the inlet of the gas pipe (2) to filter out solid impurities contained in the gas entering the gas pipe (2).
2. The gas closed sampling device according to claim 1, characterized in that: The heat tracing device (5) includes a heat source circulation pipe (51) with the pipe body located inside the sealed chamber (1) and the pipe opening located outside the sealed chamber (1), and a heat exchange medium is circulated inside the heat source circulation pipe (51).
3. The gas closed sampling device according to claim 2, characterized in that: The sealed chamber (1) has a nitrogen pipe (8) equipped with a nitrogen valve (7). Nitrogen gas is introduced into the sealed chamber (1) through the nitrogen pipe (8) to form a nitrogen atmosphere, and the heat exchange medium exchanges heat with the nitrogen atmosphere.
4. The gas closed sampling device according to claim 3, characterized in that: The gas pipe (2) is provided with a sampling valve (9), a bulb sampling inlet valve (10), a return valve (11) and a bulb sampling outlet valve (12) in sequence along the gas flow direction; the sampling pipe (3) is connected to the bulb sampling inlet valve (10) and the bulb sampling outlet valve (12); the filter device (6) is located between the sampling port of the gas pipe (2) and the sampling valve (9).
5. A closed-loop gas sampling device according to claim 4, characterized in that: A pressure gauge (13) is installed on the gas pipe (2) between the spherical sampling inlet valve (10) and the return sampling valve (11).
6. A closed-loop gas sampling device according to claim 4, characterized in that: The gas pipe (2) is connected to a purge pipe (14) located between the filter device (6) and the sample inlet valve (9). A purge valve (15) is installed on the purge pipe (14). The purge pipe (14) has two outlets. One outlet is a forward purge end (14a) that is in the same direction as the gas sample inlet, and the other outlet is a reverse purge end (14b) that is in the opposite direction to the gas sample inlet. The reverse purge end (14b) backflushes the filter device (6).
7. A closed-loop gas sampling device according to claim 6, characterized in that: The filtration device (6) is a gas filter equipped with a filter screen or filter media. Solid impurities accumulated on the filter screen or filter media are backflushed through the backflushing gas purging end (14b) and discharged through the inlet of the gas pipe (2).