A synthesis gas cooler temperature control system and its control method

Abstract

The invention discloses a temperature control system and method of a synthetic gas cooler. The control system adopts a multiple control system mode, the temperature stability and limitation under a single control system mode are effectively improved, double systems are adopted, the different control systems are selected at the different temperatures to control the temperature of the synthetic gascooler, under different working conditions, the first temperature control system and the second temperature control system are connected in parallel to be put into use, thus the workload of the firsttemperature control system in the working process is relieved, the problems that the single system heat exchange effect is poor, the temperature of the synthetic gas cooler is too high, and thus tripping of a gasification furnace is triggered are avoided, the stability and reliability of temperature control of a synthetic gas cooling system can be effectively improved, thus a coal gasification device can operate more safely and steadily, and unplanned stopping of the device can be reduced; and materials are recycled, the process cost is lowered, and the workload is reduced.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a temperature control system and a control method of a synthesis gas cooler. Background technique [0002] The syngas is sent to the syngas cooler and then sent to the downstream process unit after being cooled. During the operation of the syngas cooler, the process water and solid materials after heat exchange in the syngas cooler can be recycled to maintain the temperature of the syngas cooler. If the temperature of the syngas cooler is too low, the tar entrained in the crude syngas will be precipitated and combined with the solid materials in the syngas cooler, resulting in poor solid discharge and affecting the heat exchange effect; If the temperature of the cooler is too high, it will trigger the trip of the gasifier, which will affect the normal temperature operation of the device. Therefore, the temperature control of the syngas cooler is cruci...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, most of the syngas coolers adopt the single control system mode, and the heat exchange effect is not good, which affects the stability of the temperature control of the syngas cooler. During the operation of the syngas cooler under the single control mode, once The temperature cannot be controlled, which will cause the shutdown of the device; and the process water and solid materials after heat exchange in the existing syngas cooler cannot be recycled, resulting in high process costs

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