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

A temperature control system and temperature control loop technology, applied in the field of natural gas chemical industry, can solve the problems of control system response delay, low control accuracy, temperature control system unable to control the temperature distribution of the whole tower, etc., and achieve the effect of precise control and timely temperature

Active Publication Date: 2021-03-16
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment

[0078] In this embodiment, the first temperature control loop and the second temperature control loop are arranged on the basis of the existing triethylene glycol dehydration process, wherein:

[0079] The first temperature control loop includes a first flow sensor 1, a first flow controller 2, a first temperature sensor 3, a first temperature controller 4, a first adder 5, a first solenoid valve 6 and a manual valve required for matching 15 and bypass line 21. The first flow sensor 1 is arranged on the natural gas inlet pipeline 19, the first flow controller 2 is connected with the first flow sensor 1, the first temperature sensor 3 is arranged on the top of the regeneration device 16, the first temperature controller 4 is connected with the first temperature sensor 3 is connected, the first adder 5 is connected with the first flow controller 2 and the first temperature controller 4 to perform the addition operation of the control signal, the first solenoid valve 6 is arrange...

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/13G05D23/19G05B13/02G05B13/04C10L3/10
CPCC10L3/106G05B13/027G05B13/042G05D23/1393
Inventor 张早校王磊仝淑月高继峰
Owner XI AN JIAOTONG UNIV
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