Temperature and flow decoupling control structure and method

A technology of decoupling control and temperature controller, applied in non-electric variable control, control/regulation system, and simultaneous control of multiple variables, etc., can solve the problems of untimely control, inability to achieve precise control, divergence, etc.

Active Publication Date: 2016-07-27
BEIJING CENTURY ROBUST TECH
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Problems solved by technology

It can be seen that once the temperature or flow is disturbed or the set value is changed, all variables will be related by the coupling effect. When the

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  • Temperature and flow decoupling control structure and method
  • Temperature and flow decoupling control structure and method
  • Temperature and flow decoupling control structure and method

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[0161] In conjunction with the specific embodiments, the present invention is further explained as follows.

[0162] like Figure 5-8 As shown in the figure, the temperature and flow of mixed regeneration gas in the hydrogen dryer are decoupled control, the mixed regeneration gas temperature set value is TIC340197.SV, the mixed regeneration gas temperature measurement value is TIC340197.PV; the mixed regeneration gas flow set value is FIC340195 .SV, the mixed regeneration gas flow measurement is FIC340195.PV.

[0163] (1) The flow is adjusted separately, such as Image 6 shown.

[0164] In the original system, keeping the temperature set value unchanged at 232°C, when the flow set value increases from 1.5t / h to 1.8t / h, the maximum temperature deviation from the set value is 10°C; the flow set value changes from 1.8t When / h is reduced to 1.5t / h, the maximum temperature deviation from the set value is 9.6℃.

[0165] After the decoupling control is put into use, keep the tem...

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Abstract

The invention discloses a temperature and flow decoupling control structure and method. According to the structure, two decoupling calculation blocks are additionally arranged in an original mixed material system, after output of a temperature controller and output of the decoupling calculation blocks are added together, the output acts on a hot-fluid regulating valve, and thus the temperature controller acts on adjustment of the percentage of a hot material flow in a total flow; after output of a flow controller and output of the decoupling calculation blocks are added together, the output acts on a cold-fluid regulating valve, and thus the flow controller acts on adjustment of the total flow of a mixed material, the flow is unchanged during temperature adjustment, the temperature is changed during flow adjustment, mutual interference is eliminated during simultaneous adjustment of the temperature and the flow, and a decoupling control effect is realized in such a way. For the purpose of improving the system operability, in such a structure, a temperature controller output and decoupling calculation block and a flow controller output and decoupling calculation block are connected with a decoupling control button, so that disturbance-free switching can be automatically completed when decoupling is put in service, abrupt change of the opening degrees of the regulating valves is prevented, and the stability of the mixed material system is enhanced.

Description

technical field [0001] The invention relates to a temperature and flow decoupling control structure and method, belonging to the technical field of chemical production automatic control. Background technique [0002] In the process of chemical production, some operating units require materials at a certain temperature and flow rate, and it is hoped that the temperature and flow rate of the materials will remain stable. against figure 1 The system shown, the material of the system is formed by the confluence of two streams of cold and hot materials. It can be seen from the figure that the change of one of the two feeds will affect the other feed, and the two feeds are interrelated. For example, increasing the temperature of the mixed material requires more hot material, which will increase the total flow rate. At this time, in order to ensure the flow stability of the mixed material, the cold material regulating valve will be closed, and the flow rate of the cold material w...

Claims

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Application Information

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IPC IPC(8): G05D27/02
CPCG05D27/02
Inventor 王文新李全善徐开慧焦阳
Owner BEIJING CENTURY ROBUST TECH
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