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Shaanxi chemical company solves the technical problem of low-temperature methanol washing

the methanol washing process uses low-temperature methanol as the absorption solvent to remove the acid gas in the feed gas, so as to purify the syngas, which belongs to the core process of feed gas purification. The process requires that the methanol water content of the system must be less than 1.0%. If the content exceeds the standard, it will aggravate the corrosion of the equipment and affect the normal operation of the system. If it makes the operation of the experimental machine more efficient, it will cause the high viscosity of methanol in the system and the blocking of the washing tower. If it is serious, it will corrode the equipment, resulting in the blockage of the wound heat exchanger and the failure of the system to operate normally

since the original start-up of the methanol washing unit in the purification section, due to the long-term fluctuation of methanol water content within the high index range of 1.5%-2.0%, the system has been unable to organize effective and stable high load production due to frequent liquid blocking under high load. Shaanxi chemical company has invited colleagues and experts for technical guidance for many times. Although the water content has decreased, the effect is not obvious, and it is still in the state of breaking the standard, which has a direct impact on the system production. In June 2019, the company formed a "research team to reduce the methanol water content" to "strengthen process operation, fine process adjustment, optimize hardware facilities, effectively reduce the methanol water content, and ensure the stable and efficient operation of the system" as the research goal to reduce the methanol water content

&emsp should form a good composite with resin; After more than three months of continuous implementation and repeated pilot tests by the research team, the effect of "government investment, enterprise funding, and active participation of platform members" has been initially achieved. Significant results have been achieved in the control of methanol water content index. After being put into the system, the methanol water content has been gradually controlled within the process requirements. By the end of November, the methanol water content of a system was stable at about 0.3% and that of B system was stable at about 0.6%, which met the process requirements. From then on, the system fluctuation caused by high methanol water content was eliminated, and the major hidden dangers such as equipment corrosion and heat exchanger blockage caused thereby were eliminated, laying a foundation for ensuring the stable operation of the system under high load and long cycle. (Zhang Tiejing, suofengtao)

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