A kind of temperature control system and method for triethylene glycol dehydration process

Abstract

The invention discloses a temperature control system and a temperature control method for a triethylene glycol dehydration process. The temperature control system comprises a first temperature controlloop and a second temperature control loop, wherein the first temperature control loop and the second temperature control loop control the top part temperature of a regeneration device by adjusting the flow of a cooling medium entering the top part of the regeneration device, and control the bottom part temperature of the regeneration device by adjusting the flow of a fuel gas entering the bottompart of the regeneration device; and the first temperature control loop and the second temperature control loop each comprise a feedforward control structure and a feedback control structure, feedforward control signals and feedback control signals are subjected to weighted operation through an adder and then act on corresponding valves for adjustment, and the weights of weighted operation are dynamically updated according to real-time temperature deviation. According to the temperature control system and the temperature control method, the accuracy and timeliness of temperature control of atriethylene glycol dehydration device are improved.

Description

technical field [0001] The invention relates to the field of natural gas chemical industry, in particular to a temperature control system and method for a triethylene glycol dehydration process. Background technique [0002] The natural gas produced from oil and gas wells will contain a large amount of saturated steam and even free droplets. When the water content exceeds a certain range, it will not only reduce the pipeline transportation capacity, but at the same time, due to the changes in transportation pressure and surrounding environment, the formed hydrate and Acidic substances will also corrode the pipeline, and even cause the burner of the user's gas heating furnace to go out, which poses a serious safety hazard. Therefore, it is necessary to reduce the water content of the exported natural gas through the dehydration link. At present, triethylene glycol dehydration process is widely used in natural gas dehydration due to its advantages of good hygroscopicity, high ...

AI Technical Summary

Problems solved by technology

Since the regeneration device is mostly a tower structure, this kind of temperature control system cannot control the temperature distribution of the whole tower, and the control accuracy is low; at the same time, there is a certain degree of delay in the response of the control system to external interference and variable working conditions

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