Method and device for slowing down corrosion of reflux system at top of condensate stripping tower

Abstract

The invention provides a method and device for slowing down corrosion of a reflux system at the top of a condensate stripping tower, belonging to the technical field of the coal chemical industry andpetroleum processing. The device comprises a condensate stripping tower and a spray tower, wherein tower-top non-condensable gas output from the tower top of the condensate stripping tower is cooled by the spray tower. The device is simple in structure and convenient operation; the spray tower is used as a cooling system of the non-condensable gas to replace a traditional overhead condenser, so the problem of local severe corrosion of ammonia substances in an overhead reflux system in an existing condensate stripping process can be effectively solved or relieved, inspection and maintenance cost is reduced, non-planned shutdown caused by leakage is avoided or reduced, maintenance cost is reduced, and safe, stable and long-period operation of the whole stripping system is guaranteed.

Description

technical field [0001] The invention relates to the technical fields of coal chemical industry and petroleum processing, in particular to a method and a device for slowing down the corrosion of the top reflux system of a condensate stripping tower. Background technique [0002] The CO conversion process is a key link in the coal chemical production process and an important purification process in the synthesis of ammonia, methanol and hydrogen production. In order to meet the requirements of water saving and energy saving, the process condensate of coal gasification coal water slurry process and dry powder process will be recycled. [0003] The function of the condensate stripping tower in the conversion section is to strip the ammonia in the low-temperature condensate returned to the gasification to maintain the ammonia balance in the system. The stripping effect will directly affect the ammonia index in the gasification ash water, thereby affecting to the discharge of gas...

AI Technical Summary

Problems solved by technology

[0004] However, there is a common problem of corrosion leakage in the overhead condenser designed with a reflux system

Most of the factories with corrosion occur between half a year and one year after driving. The corroded materials are all stainless steel, which seriously restricts the long-term stable operation of the device. While posing a great threat to the safe production of the device, it also brings certain risks. economic loss and environmental damage

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