Is it better to locate the manhole of the liquefied gas amine liquid separation tank between the wire mesh demister and the inlet, or between the wire mesh demister and the outlet?
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In the reference materials I saw, the manhole is located between the wire mesh demister and the inlet. But considering the large size of the manhole, wouldn’t it be better to place it between the wire mesh demister and the outlet? In that case, the wire mesh demister could be positioned closer to the inlet and further away from the outlet, which would improve the efficiency of separating the amine solution. What do you all think? Thank you
From the perspective of professional gas-liquid separation, the distances between the demister and the gas inlet, as well as between the demister and the gas outlet, are determined by the configuration of the internal components, the flow contraction effect as the fluid passes through these components from the inlet to the outlet of the separator, and the maximum allowable velocity of the fluid on the surfaces of these components. There are minimum values for the distance between the demister and the gas inlet, as well as between the demister and the gas outlet. Below this value, it will inevitably lead to a decrease in the demisting efficiency, or even a significant reduction in it. You can provide me with the relevant operating condition data, and I will calculate this value accurately for you. Only professional dynamics separation technology companies equipped with a precise calculation and design system platform for gas-liquid demisting and defoaming separation can accurately calculate and determine this lower limit value. As for whether the manhole is placed between the gas phase inlet and the demister, or between the demister and the gas phase outlet, it depends on the installation method of the demister. When the wire mesh demister is installed in a bottom-mounted configuration, the manhole is located below the demister, that is, between the gas phase inlet and the demister. When the screen demister is installed in an upward configuration, the manhole is located above the demister, that is, between the gas phase outlet and the demister. Since the mesh demister operates on the principle of traditional pore-based interception and separation, the upstream airflow may carry broken catalyst particles, rust, and other debris to the mesh demister, causing the flow channels within the mesh to become gradually blocked. Additionally, the airflow can erode and corrode the mesh, leading to wire breaks and damage. Therefore, the screen defoaming internals must be replaced and maintained regularly. The replacement and maintenance of the wire mesh demister involve accessing the separator channels, which are usually manholes. Regular replacement and maintenance of wire mesh demisters, or occasional troubleshooting, require a series of complex procedures such as depressurizing the separation tank, draining the feed material, purging with steam, carrying out displacement operations, protecting personnel while removing the wire mesh, installing new wire mesh components, rechecking the fixings, displacing the feed gas, restoring the liquid level, and increasing pressure. As a result, the operational and maintenance costs are high. In recent years, both domestically and internationally, the latest vane-type high-efficiency gas-liquid demisting and defogging separation components have been adopted to technically upgrade traditional mesh demisters. The feather-leaf type high-efficiency gas-liquid demisting and separation element can be installed in one go, has a service life of up to 20 years under continuous operation, and offers numerous advantages such as higher separation efficiency, lower operating pressure drop, greater operational flexibility, no need for spare parts replacement, and extremely low operating and maintenance costs. This technology has been widely applied in the domestic and international petrochemical, coal chemical, natural gas processing and transportation, large-scale chemical manufacturing, fine chemical, pharmaceutical, environmental protection, papermaking, offshore platforms, and onshore terminals industries. For more information on the high-efficiency air-liquid demisting and defoaming separation internals using feather-leaf design, as well as other related high-efficiency kinetic separation technologies, please visit the HaiChuan Chemical Industry Forum at the link http://bbs.hcbbs.com/thread-1354814-1-1.html. You can also contact professional separation technology companies for technical support.
Do you have any experience with liquid-liquid separation, such as liquefied gas and amine-rich liquids?
We have G56 type coalescing vane-type liquid-liquid separators. Please visit the official website to find technical information on the G56 type coalescing vane liquid-liquid separator; we can provide Haiyou with professional technology and internal components.