Acid natural gas sampling and neutralizing device

Abstract

The utility model relates to the technical field of natural gas treatment, in particular to an acidic natural gas sampling and neutralizing device which comprises a neutralizing barrel, a neutralizing barrel cover and at least one gas inlet, the at least one gas inlet is arranged at the bottom of the barrel wall of the neutralizing barrel, the neutralizing barrel cover is connected to the top of the neutralizing barrel, and the neutralizing barrel cover is connected to the top of the neutralizing barrel. Compared with the prior art, the device has the advantages that hydrogen sulfide gas discharged in the sampling process can fully react with neutralizing liquid, the neutralizing liquid is effectively prevented from splashing down to the ground, meanwhile, the neutralizing liquid is convenient to replace, and the situation that the neutralizing liquid is poured out of the ground due to the fact that the neutralizing liquid barrel is blown over by strong wind is prevented; and environmental pollution and personnel poisoning are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas processing, in particular to an acidic natural gas sampling and neutralization device. Background Art

[0002] Sour natural gas refers to natural gas with a sulfur content higher than 20 mg / m 3 Natural gas contains significant gas phase impurities such as H2S, CO2, COS and RSH. Among them, H2S is the most toxic acid gas component. It is deadly toxic and corrosive to metals. It can easily clog pipelines and needs to be purified to meet pipeline transportation standards.

[0003] Natural gas sampling refers to the process of collecting samples from natural gas fluids for analysis or testing. These analyses can involve the composition, composition, physical properties, chemical properties, and potential contaminants of natural gas. Sampling is critical to understanding and controlling the quality, safety, and reliability of natural gas. The main purpose of sampling is to obtain representative samples of natural gas fluids at a specific point in time to evaluate their quality and characteristics. This helps ensure the safety and reliability of natural gas during exploration, production, processing, and transportation, and complies with relevant standards and regulations. Sampling can be carried out through different methods, including field sampling and sampling tank sampling. Field sampling is suitable for continuously flowing natural gas, while sampling tank sampling is suitable for non-continuously flowing or steady-state natural gas. Sampling methods and techniques can be adjusted and optimized according to specific applications and needs.

[0004] The frequency of acid gas sampling and analysis varies according to the production conditions of each gas well, and is generally divided into monthly sampling or quarterly sampling. Before each sampling, the sampling bottle needs to be connected to the sampling device, and the residual sour natural gas in the sampling bottle needs to be discharged into the neutralization barrel connected to it for neutralization. The sampling bottle needs to be purged and replaced to replace the residual gas in the gas bottle, ensuring that the natural gas sample in the sampling bottle reflects the various components of the natural gas in the gas well as accurately as possible. After the sampling is completed, the sour natural gas in the sampling box and the connected pipeline needs to be discharged into the neutralization barrel to release the residual pressure before the sampling bottle can be removed.

[0005] However, the neutralizing liquid barrel currently used is made of stainless steel, which is filled with alkali liquid for a long time. The raw gas contains a large amount of H2S and CO2 gas. Long-term contact can easily cause corrosion and perforation of the neutralizing liquid barrel. Usually, the neutralizing liquid barrel is directly placed on the ground after being connected to the sampling box pipeline. It is inconvenient to replace the new neutralizing liquid and it is easy to spill on the ground. The entire sampling process involves multiple exhaust pressure relief neutralization. If the pressure relief speed is not well controlled, the neutralizing liquid will splash onto the ground, and the hydrogen sulfide gas field in the sour natural gas will not be fully neutralized with the alkali liquid, escaping into the atmosphere, posing risks such as environmental pollution and personnel poisoning. At the same time, when its concentration reaches a certain range, it will also trigger the station probe alarm. In some mountainous gas fields, there are many strong winds, which can easily blow down the neutralizing liquid barrel and pour the neutralizing liquid out of the ground, causing environmental pollution and safety hazards. Utility Model Content

[0006] The utility model aims to solve the problem that the structure of the existing neutralizing liquid barrel makes it impossible for the acidic natural gas to fully react with the neutralizing liquid and escape into the atmosphere, thereby causing the risk of corrosion and overturning of the neutralizing liquid barrel and causing poisoning to personnel, and provides an acidic natural gas sampling and neutralization device.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A sour natural gas sampling and neutralization device comprises a neutralization barrel, a neutralization barrel cover and at least one air inlet, wherein at least one air inlet is arranged at the bottom of the barrel wall of the neutralization barrel, the neutralization barrel cover is connected to the top of the neutralization barrel, and the barrel bottom of the neutralization barrel is fixedly connected to the ground.

[0009] The neutralization barrel described in this scheme is used to hold the neutralization liquid, and the neutralization barrel cover is used to cover the top of the neutralization barrel to prevent the neutralization liquid from being pumped out due to excessive release pressure, thereby polluting the environment and poisoning people. The bottom of the neutralization barrel is fixedly connected to the ground to prevent the neutralization barrel from being blown down by strong winds or kicked down by people accidentally. The neutralization barrel also includes at least one air inlet, and at least one of the air inlet is arranged at the bottom of the barrel wall of the neutralization barrel. The air inlet is arranged at the bottom of the barrel wall of the neutralization barrel so that after the neutralization liquid is added, the air inlet can be below the liquid level of the neutralization liquid, so that the acidic natural gas can better react with the neutralization liquid, avoiding insufficient reaction and the emission of toxic gases into the atmosphere.

[0010] The acidic natural gas sampling and neutralization device of the present invention has a simple structure, low cost and is easy to manufacture. Compared with the prior art, the device sets an air inlet at the bottom of the neutralization barrel wall, so that the acidic gas discharged during the sampling process can fully react with the neutralization liquid. The neutralization barrel cover is set to effectively prevent the neutralization liquid from splashing onto the ground. The barrel bottom is fixedly connected to the ground to facilitate the replacement of the neutralization liquid and prevent strong winds from overturning the neutralization liquid barrel, causing the neutralization liquid to pour out of the ground, thereby avoiding environmental pollution and personal poisoning.

[0011] As a preferred embodiment of the present invention, the inner walls of the neutralization barrel and the neutralization barrel cover are made of corrosion-resistant material.

[0012] This proposal recommends that the inner wall of the neutralization barrel and the neutralization barrel cover be made of corrosion-resistant material. Since acidic natural gas contains significant H2S, which is corrosive to metals, the inner wall of the neutralization barrel and the neutralization barrel cover is made of corrosion-resistant material to ensure its durability and safety during use. The corrosion-resistant material can effectively resist the erosion of chemical substances, thereby extending the service life of the neutralization barrel and the neutralization barrel cover. This can not only reduce the frequency of maintenance and replacement, but also ensure safety and reliability during storage.

[0013] As a preferred solution of the present utility model, the inner walls of the neutralization barrel and the neutralization barrel cover are made of PVC material.

[0014] This proposal recommends that the inner wall of the neutralization barrel and the neutralization barrel cover be made of PVC material. PVC material has good corrosion resistance and mechanical properties, and can meet the use requirements of the neutralization barrel and the neutralization barrel cover. The use of PVC material can effectively resist the erosion of chemical substances and extend the service life of the neutralization barrel and the neutralization barrel cover. In addition, PVC material also has good stability and safety, which can ensure safety and reliability during storage.

[0015] Compared with other materials, PVC is more economical and environmentally friendly. It is a recyclable and environmentally friendly material that can reduce environmental pollution and resource waste. At the same time, the price of PVC is relatively low, which can reduce the production and maintenance costs of neutralization barrels and neutralization barrel covers.

[0016] As a preferred embodiment of the present invention, the outer walls of the neutralization barrel and the neutralization barrel cover are made of wear-resistant material.

[0017] This proposal recommends that the outer wall of the neutralization barrel and the neutralization barrel cover be made of wear-resistant material. Since the device often bumps during daily use, in order to protect the inner wall of the neutralization barrel and the neutralization barrel cover, the outer wall of the neutralization barrel and the neutralization barrel cover needs to be made of wear-resistant material. In addition, the outer wall can be coated with an anti-wear coating or other anti-wear technology can be used. These measures can further enhance its durability and safety and extend its service life.

[0018] As a preferred solution of the utility model, the outer wall and the inner wall of the neutralization barrel are sleeved with each other; the outer wall and the inner wall of the neutralization barrel cover are sleeved with each other.

[0019] This scheme recommends that the outer wall and inner wall of the neutralization barrel and the neutralization barrel cover be nested with each other. The close fit between the outer wall and the inner wall can prevent material leakage, ensure that during the neutralization process, the neutralization liquid will not enter the gap between the inner wall and the outer wall, and will not cause pollution to the external environment; enhance structural strength, the outer wall and the inner wall are nested with each other, which can make the structure of the neutralization barrel and the neutralization barrel cover more solid and able to withstand greater pressure or weight; facilitate cleaning and maintenance, the outer wall and the inner wall that are nested with each other can make the neutralization barrel and the neutralization barrel cover easier to disassemble and assemble, facilitate cleaning and maintenance, and extend service life.

[0020] As a preferred solution of the utility model, the bottom of the neutralization barrel is connected to the support legs, and the bottom of the support legs is fixedly connected to the ground.

[0021] This solution recommends connecting support legs to the bottom of the neutralization barrel, which can increase the stability and load-bearing capacity of the neutralization barrel, making it more stable during placement or use. The bottom of the support legs is fixedly connected to the ground, further enhancing the stability of the neutralization barrel.

[0022] As a preferred solution of the utility model, the bottom of the neutralization barrel is connected to a drain valve.

[0023] This scheme recommends connecting a drain valve to the bottom of the neutralization barrel. The drain valve is connected to the bottom of the neutralization barrel. Since the bottom of the neutralization barrel is fixedly connected to the ground, when the waste liquid needs to be discharged, it is necessary to release the constraint of the bottom of the neutralization barrel to pour out the waste liquid, or use a water pipe to guide the waste liquid in the barrel. This method may result in unclean treatment of the waste liquid at the bottom of the neutralization barrel. Therefore, a drain valve is connected to the bottom of the neutralization barrel to drain the waste liquid in the neutralization barrel without releasing the constraint of the bottom of the neutralization barrel.

[0024] As a preferred solution of the utility model, at least two buckles are provided on the neutralization barrel cover, and the neutralization barrel and the neutralization barrel cover are connected by buckles.

[0025] This proposal recommends that at least two buckles be provided on the neutralization barrel cover, and the neutralization barrel and the neutralization barrel cover are connected by buckles, which can make the connection between the neutralization barrel cover and the neutralization barrel more stable and safe. The buckle design can provide a certain mechanical strength and stability, so that the neutralization barrel cover is not easy to fall off or shift. This buckle connection method is suitable for different types of neutralization barrels and neutralization barrel covers, and has good versatility and adaptability. When the neutralization barrel cover needs to be opened, the neutralization barrel cover can be easily opened by just lightly pressing or pulling the buckle. This can greatly facilitate the user's operation and improve work efficiency. At the same time, the buckle design can also ensure the sealing of the neutralization barrel cover to prevent material leakage or contamination.

[0026] As a preferred solution of the utility model, a mist catching net is further provided in the neutralization barrel, and the mist catching net is connected to the inner wall of the neutralization barrel.

[0027] This proposal recommends that a mist catcher net is also provided in the neutralization barrel, and the mist catcher net is connected to the inner wall of the neutralization barrel. When the hydrogen sulfide gas carrying liquid droplets encounters the mist catcher net during the rising process, it will hit the mist catcher net, and the flow direction of the gas and liquid will change. The hydrogen sulfide gas will react chemically with the neutralization liquid again, and the liquid droplets will fall back into the neutralization liquid. Through the mist catcher net, the escape of mist or steam generated during the neutralization process can be effectively reduced, reducing pollution to the environment and the impact on operators. At the same time, the mist catcher net can also help maintain the temperature and pressure in the neutralization barrel stable, and improve the efficiency and effect of the neutralization process.

[0028] As a preferred solution of the utility model, the air inlet is connected to a high-pressure resistant pipe.

[0029] This solution recommends that the air inlet be connected to a high-pressure resistant pipe, which has a high pressure bearing capacity and can meet the pressure requirements during the sour natural gas sampling process, thereby ensuring the accuracy and reliability of the sampling.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0031] 1. The neutralization barrel described in this scheme is used to hold the neutralization liquid, and the neutralization barrel cover is used to cover the top of the neutralization barrel to prevent the neutralization liquid from being pumped out due to excessive release pressure, thereby polluting the environment and poisoning people. The bottom of the neutralization barrel is fixedly connected to the ground to prevent the neutralization barrel from being blown down by strong wind or kicked down by people by mistake. The neutralization barrel also includes at least one air inlet, and at least one of the air inlet is arranged at the bottom of the barrel wall of the neutralization barrel. In the actual sampling step, multiple sampling bottles or sampling pipes are often directly introduced into the neutralization barrel. Multiple air inlets can improve construction efficiency. The air inlet is arranged at the bottom of the barrel wall of the neutralization barrel so that after the neutralization liquid is added, the air inlet can be below the liquid level of the neutralization liquid, so that the acidic natural gas can react better with the neutralization liquid, avoiding insufficient reaction and the emission of toxic gases into the atmosphere. The acidic natural gas sampling and neutralization device of the present invention has a simple structure, low cost and is easy to manufacture. Compared with the prior art, the device sets an air inlet at the bottom of the neutralization barrel wall, so that the acidic gas discharged during the sampling process can fully react with the neutralization liquid. The neutralization barrel cover is set to effectively prevent the neutralization liquid from splashing onto the ground. The barrel bottom is fixedly connected to the ground to facilitate the replacement of the neutralization liquid and prevent strong winds from overturning the neutralization liquid barrel, causing the neutralization liquid to pour out of the ground, thereby avoiding environmental pollution and personal poisoning. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of an acidic natural gas sampling and neutralization device of the utility model;

[0033] Figure 2 This is a schematic diagram of a sampling process of an acidic natural gas sampling and neutralization device of the utility model;

[0034] Icons: 1-neutralization barrel; 11-support leg; 12-drain valve; 13-mist catcher; 2-neutralization barrel cover; 3-air inlet; 5-pipeline; 51-air source; 52-double valve group; 53-first needle valve; 54-pressure gauge; 55-dryer; 56-pressure reducing valve; 57-three-way valve; 58-second needle valve; 59-double-valve sampling cylinder. DETAILED DESCRIPTION

[0035] The utility model is described in detail below in conjunction with the accompanying drawings.

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "connected" and "connection" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0038] Example 1

[0039] like Figure 1 As shown, the utility model adopts an acidic natural gas sampling and neutralization device, a neutralization barrel 1, a neutralization barrel cover 2 and at least one air inlet 3, at least one of the air inlet 3 is arranged at the bottom of the barrel wall of the neutralization barrel 1, the neutralization barrel cover 2 is connected to the top of the neutralization barrel 1, and the barrel bottom of the neutralization barrel 1 is fixedly connected to the ground.

[0040] Specifically, an acidic natural gas sampling and neutralization device includes an outer wall of a neutralization barrel 1, an inner wall of the neutralization barrel 1, an air inlet 3, a drain valve 12, support legs 11, a mist catching net 13, and a neutralization barrel cover 2.

[0041] The outer wall of the neutralization barrel body is made of wear-resistant material to prevent aging caused by wind, sun, rain and rain. The outer wall of the neutralization barrel body is made of corrosion-resistant material and will not be corroded and perforated by the neutralizing liquid. The air inlet pipeline is a high-pressure resistant pipe, which is connected to the neutralizing liquid through a threaded joint. The drain valve is located at the bottom of the device. When replacing the neutralizing liquid, the drain valve can be opened to put the old neutralizing liquid into the waste liquid collection bucket. After the old neutralizing liquid is discharged, the drain valve is closed, and the neutralization barrel cover with a buckle is opened to add new neutralizing liquid. At least one vent is set on the neutralization barrel cover to ensure the stability of atmospheric pressure. Support legs are also provided at the bottom, which can be fixed to the ground with expansion bolts to prevent strong winds from blowing over the neutralizing liquid and polluting the environment. A mist catching net 13 is also provided in the neutralization barrel 1. The mist catching net 13 is connected to the inner wall of the neutralization barrel 1. The mist catching net is made of palm mats and felt mats, and is fixed with stainless steel edge strips around the periphery. When the hydrogen sulfide gas carrying droplets encounters the mist catching net during the rising process, it will collide with the mist catching net, and the flow direction of the gas and liquid will change. The hydrogen sulfide gas will react chemically with the neutralization liquid again, and the droplets will fall back into the neutralization liquid.

[0042] Example 2

[0043] The difference between Example 2 and Example 1 is that in Example 2, the outer wall of the neutralization barrel body and the outer wall of the neutralization barrel cover are made of stainless steel, which is a metal material with high durability and stability, and can resist the erosion of external chemicals and the wear of external factors, so it is very suitable for the outer wall of the neutralization barrel and the neutralization barrel cover. The stainless steel material is also easy to clean, not easy to rust, and has a long service life. This allows the neutralization barrel and the neutralization barrel cover to maintain a good appearance and performance during use, and reduce the frequency of maintenance and replacement.

[0044] Example 3

[0045] The difference between Example 3 and Example 1 is that in Example 3, the inner wall of the neutralization barrel and the neutralization barrel cover is made of PVC material, which has good corrosion resistance and mechanical properties and can meet the use requirements of the neutralization barrel and the neutralization barrel cover. The use of PVC material can effectively resist the erosion of chemical substances and extend the service life of the neutralization barrel and the neutralization barrel cover. In addition, the PVC material also has good stability and safety, which can ensure safety and reliability during storage.

[0046] Example 4

[0047] The difference between Example 4 and Example 1 is that in Example 4, at least two buckles are provided on the neutralization barrel cover 2, and the neutralization barrel 1 and the neutralization barrel cover 2 are connected by buckles, which can make the connection between the neutralization barrel cover and the neutralization barrel more stable and safe. The buckle design can provide a certain mechanical strength and stability, so that the neutralization barrel cover is not easy to fall off or shift. This buckle connection method is suitable for different types of neutralization barrels and neutralization barrel covers, and has good versatility and adaptability.

[0048] Example 5

[0049] The difference between Example 5 and Example 1 is that in Example 5, the air inlet 3 is connected to a stainless steel high-pressure metal winding pipe. The metal winding pipe has a high pressure bearing capacity, which can meet the pressure requirements during the acid natural gas sampling process and ensure the accuracy and reliability of the sampling. The metal winding pipe has a small diameter and a compact structure, which can reduce the size of the air inlet and facilitate the overall design and layout of the neutralization device. The metal winding pipe adopts a spiral winding method, which is easy to install and can reduce installation costs and time. Both the stainless steel material and the metal winding pipe have a long service life, which can ensure the long-term stable operation of the acid natural gas sampling and neutralization device.

[0050] Example 6

[0051] The difference between Example 6 and Example 1 is that there are two air inlets in Example 6, namely the sampling valve inlet and the sampling bottle inlet, and both air inlets are opened and closed by valves; Figure 2 As shown, the existing sampling process is: pipeline 5 starts from gas source 51, and is connected to double valve group 52, first needle valve 53, pressure gauge 54, dryer 55, pressure reducing valve 56, three-way valve 57 in sequence. After passing through the three-way valve, one pipeline is connected to second needle valve 58 and double valve sampling cylinder 59 in sequence, and the other pipeline bypasses the second needle valve 58 and double valve sampling cylinder 59, and is directly connected to the subsequent pipeline of double valve sampling cylinder 59. After the two pipelines intersect, they are passed into neutralization barrel 1. The two air inlets are divided into sampling valve inlet and sampling bottle inlet because the sampling valve inlet is used to neutralize the excess gas taken out during the sampling process, and the sampling bottle inlet is used to neutralize the gas in the sampling bottle after analyzing the various components of natural gas in the sampling bottle after the sampling is completed.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for sampling and neutralizing acidic natural gas, characterized in that: The invention comprises a neutralization barrel (1), a neutralization barrel cover (2) and at least one air inlet (3), wherein at least one air inlet (3) is arranged at the bottom of the barrel wall of the neutralization barrel (1), the neutralization barrel cover (2) is connected to the top of the neutralization barrel (1), and the barrel bottom of the neutralization barrel (1) is fixedly connected to the ground.

2. The acidic natural gas sampling and neutralization device according to claim 1, characterized in that: The inner walls of the neutralization barrel (1) and the neutralization barrel cover (2) are made of corrosion-resistant material.

3. The acidic natural gas sampling and neutralization device according to claim 2, characterized in that: The inner walls of the neutralization barrel (1) and the neutralization barrel cover (2) are made of PVC material.

4. The acidic natural gas sampling and neutralization device according to claim 1, characterized in that: The outer walls of the neutralization barrel (1) and the neutralization barrel cover (2) are made of wear-resistant material.

5. The acidic natural gas sampling and neutralization device according to claim 4, characterized in that: The outer wall and inner wall of the neutralization barrel (1) are sleeved together; the outer wall and inner wall of the neutralization barrel cover (2) are sleeved together.

6. The acidic natural gas sampling and neutralization device according to claim 1, characterized in that: The bottom of the neutralization barrel (1) is connected to a support leg (11), and the bottom of the support leg (11) is fixedly connected to the ground.

7. The acidic natural gas sampling and neutralization device according to claim 1, characterized in that: The bottom of the neutralization barrel (1) is connected to a drain valve (12).

8. The acidic natural gas sampling and neutralization device according to claim 1, characterized in that: The neutralization barrel cover (2) is provided with at least two buckles, and the neutralization barrel (1) and the neutralization barrel cover (2) are connected by buckles.

9. The acidic natural gas sampling and neutralization device according to claim 1, characterized in that: A mist catching net (13) is also provided in the neutralization barrel (1), and the mist catching net (13) is connected to the inner wall of the neutralization barrel (1).

10. The acidic natural gas sampling and neutralization device according to claim 1, characterized in that: The air inlet (3) is connected to a high pressure resistant pipe.

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