Gas cabinet
Gasholders, also known as gas tanks in some cases, are critical equipment used to safely store, handle, and control the flow of various gases, typically in industrial settings. These closed pressure vessels are essential for balancing gas supply and demand, stabilizing production processes, and providing critical buffering and safety protection. Gasholders are classified according to pressure level (low pressure and high pressure), structural form (wet, dry, and spherical), and material (carbon steel, stainless steel, aluminum alloy), each type suitable for specific applications and gas types. Gasholders are designed with strong safety features, including anti-leakage measures, fire and explosion protection, corrosion protection, and integrated monitoring and alarm systems to ensure safe operation. Regular maintenance and compliance with strict regulations and standards are essential for the safe and efficient operation of gasholders, and current trends focus on smart upgrades such as IoT integration, digital twin technology, and automation to further improve safety and operational efficiency.
| Equipment type | Classification method | Features | Application scenario |
| Low-pressure gas tank | Classification by gas storage pressure | The working pressure is low, usually below 7000 Pa. Low-pressure gas tanks can be divided into wet and dry types according to the sealing method. | Commonly used to store coal gas, biogas, etc., suitable for occasions where the balance of gas supply and demand needs to be adjusted. |
| High-pressure gas cabinet | Classification by gas storage pressure | The working pressure is relatively high, usually greater than 0.5 MPa. High-pressure gas cabinets are usually high-pressure gas storage tanks, which are cylindrical (vertical or horizontal) and spherical. | Used to store high-pressure gases such as liquefied petroleum gas and liquefied natural gas. |
| Wet gas cabinet | Classification by sealing method | Rely on water seal to seal the gas, usually composed of a water tank and a bell cover. Wet gas holders can be divided into vertical and spiral types according to the lifting method. | Suitable for storing gas, etc., but there are problems such as large gas pressure fluctuations and high energy consumption in winter. |
| Dry gas holders | Classified by sealing method | Use sealing methods such as elastic gaskets, oil seals or flexible membranes. Dry gas holders have low basic costs, small footprint, and easy operation management and maintenance. | Mostly used to store gas, suitable for large-capacity gas storage needs. |
| Vertical lift gas tank | Classification by structural form | The bell jar moves up and down directly on the vertical track, and the structure is simple. | Suitable for small and medium-sized gas storage needs. |
| Spiral gas tank | Classification by structural form | The bell jar rises and falls along the spiral track, which can save steel, but has poor adaptability to wind pressure. | Suitable for medium-sized gas storage needs. |
| References | Authors | Abstract | DOI |
| Analysis of causes of corrosion of gas tanks and protective measures | Han Xiangdong | Taking the 10 000m3 gas tank of Jinzhou Refinery as an example, the corrosion causes of the gas tank were analyzed, and comprehensive protective measures such as new anti-corrosion coatings, water corrosion inhibitors, and cathodic protection and their applications were introduced. | CNKI:SUN:SHYF.0.2000-01-022 |
| Improvement Practice and Research on Height Measurement of Water Gas Tanks | Liu Jinmin, Zhang Bin, Dong Jianhong, Wu Mingsheng, Ding Bo | Water gas tank is an important device for stable water gas output. Accurately measuring the height of water gas tank is an important means to ensure its safe operation. The principle, advantages and installation requirements of ultrasonic level meter for measuring gas tank height are introduced, and the problems existing in the actual use of ultrasonic level meter are analyzed. By combining static pressure level meter with sliding line resistance transmission and referring to each other, the reliability, safety and accuracy of gas tank height measurement are improved, which provides sufficient maintenance time for maintenance personnel and makes the measurement and control of water gas tank safe and reliable. | 10.3969/j.issn.1674-2931.2017.08.002 |
| Safety Analysis of Wet Gas Holders Based on AHP | Zhang Jie | Wet gas holders are widely used gas storage equipment in petrochemical, metallurgical, municipal and other industries. The gases stored in the gas holders are mostly chemical products or natural gas, and the storage volume is large, which poses certain safety hazards. In order to ensure the safe operation of the gas holder, this paper analyzes various possible fault damage forms of the gas holder, studies the damage mechanism of the key fault forms, and proposes effective control measures to provide a scientific basis for the safety protection of the gas holder. The main research contents and conclusions of this paper are as follows: (1) The failure damage forms and damage factors of wet gas holders were analyzed by using the hierarchical analysis method, and the importance of each controllable factor was listed and ranked. The most important factors were wall fatigue damage, tower deformation, corrosion, negative pressure, etc., which provided a basis for the identification and analysis of key controllable factors. (2) The failure damage forms and damage factors of wet gas holders were analyzed by using the rotating shell, and the importance of each controllable factor was listed and ranked. The most important factors were wall fatigue damage, tower deformation, corrosion, negative pressure, etc., which provided a basis for the identification and analysis of key controllable factors. The stress at the top of the bell jar under external and internal pressure was calculated by using the thin film theory, and the critical instability pressure under external pressure was calculated. The deformation of the bell jar under negative pressure was simulated by using ANSYS software, and it was found that the deformation was concentrated at the junction of the top of the bell jar and the wall of the bell jar, which provided a reference for the negative pressure protection of the gas holder. (3) Combined with the corrosion distribution and corrosion characteristics of the gas holder in the compressor station, its corrosion mechanism was analyzed, and a corrosion maintenance plan for the gas holder was proposed. Since the repair of spiral guide rails requires on-site sample production, VB programming is used to achieve high-precision manufacturing of sample tires. (4) Based on the corrosion detection data of gas tanks over the years, the GM (1,1) corrosion prediction model is established using the grey system theory, and the accuracy of the prediction model is tested. The accuracy result is "level 1 good", which provides help for real-time understanding of the corrosion situation of the gas tank. | 10.7666/d.y2070698 |
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