The water dew point of the 10W portable liquefying unit keeps failing to meet the requirements
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After the feed gas is metered, separated, deacidified, demercurized, dehydrated, and dehydrogenated, it enters a pre-cooler and then a cryogenic tank for liquefaction. During operation, there are repeated instances of a sudden rise in the water dew point; please discuss and analyze this issue
Repeated failures in meeting the water dew point requirements may be caused by the following reasons: 1. Low efficiency of the dehydration equipment: Check whether the dehydration devices (such as desiccants and adsorbents) are worn out and need to be replaced or regenerated. 2. Abnormal performance of the pre-cooler and cold box: Check the operation status of the pre-cooler and cold box to determine if there are issues such as poor cooling efficiency or system leaks. 3. Excessive moisture content in the feed gas: Check the moisture content of the raw gas to confirm that it meets the requirements before entering the dehydration system. 4. Poor system sealing: Check the sealing of the entire system to ensure there are no leakage points. It is recommended to conduct a thorough inspection and maintenance of the equipment to ensure operational efficiency and address the issue of unsatisfactory water dew points. .
This problem may be due to insufficient efficiency of the dehydration system or leaks. It is recommended to check the dehydration unit (such as the performance of the desiccant and its replacement frequency) as well as whether there are any leaks caused by poor sealing in the entire system. It is also necessary to ensure that the pre-cooler and cold box meet the design requirements. At the same time, monitor the moisture content in the feed gas to ensure that the input meets the processing capacity of the dehydration unit. .
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If the dehydration and dehydrocarbonization processes are not carried out using a mixed-bed system, with molecular sieve being used for dehydration followed by activated carbon for the adsorption of heavier hydrocarbons, then the dew point of the natural gas entering the cold box increases regularly – this is due to the activated carbon absorbing moisture. Some molecular sieve can be installed at the top of the dehydrocarbonization tower, or one could try reducing the flow rate of the gas used for heating and regeneration first.
1. Perhaps dew point is a control parameter for your device. 2. Excessive dew point can cause damage to the equipment. 3. The catalyst in the device has high requirements regarding dew point; exceeding this limit will affect its lifespan. 4. It is necessary to analyze the reasons for the high dew point, such as whether there is a leak in the heat exchanger or if there are problems with the drying device prior to it.