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Reflux-ratio temperature automatic control device and method of fractionating tower

A technology of automatic control device and reflux ratio, applied in the direction of distillation regulation/control, etc., can solve the problems affecting the quality requirements of the distillate at the top of the rectification tower

Active Publication Date: 2011-04-06
SHANGHAI RES INST OF CHEM IND
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Problems solved by technology

Therefore, when the temperature of the liquid distilled from the top of the rectification tower changes, the prior art is powerless, which will affect the quality requirements of the distillate liquid from the top of the rectification tower

Method used

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  • Reflux-ratio temperature automatic control device and method of fractionating tower
  • Reflux-ratio temperature automatic control device and method of fractionating tower
  • Reflux-ratio temperature automatic control device and method of fractionating tower

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] refer to figure 1 , on the one hand, the present invention is a kind of reflux ratio temperature automatic control device of rectification column, comprising:

[0025] The reflux time relay 201 is connected to the reflux passage 2051 of the rectification tower and controls its opening and closing. The distillation time relay 202 is connected to the distillation passage 2052 of the rectification tower and controls its opening and closing. The opening of the reflux passage 2051 means that the rectification The distillation column starts to reflux, and the opening of the distillation passage 2052 means that the distillation column has an output.

[0026] The collection unit 203 collects the feed liquid temperature data at the top of the rectification tower. The collection unit includes a temperature detector, and the tem...

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Abstract

The present invention discloses an automatic control device and method of reflux ratio temperature controlling in a distillation tower. The automatic control device includes a reflux time relay that controls the open and close state of a reflux passage, a distillation time relay that controls the open and close state of a distillation passage, an acquisition unit and a control unit. The control unit sets the range of feed temperature and sets the controlling time of the relays according to the reflux ratio, in this way, the said reflux passage and distillation passage are opened according to the reflux ratio if the acquired feed temperature is within the preset range, otherwise, only the said backflow passage is opened to realize a total reflux. In addition, according to the above mentioned characteristics, the present invention can realize accurate distillation cut operation of the microflow product at the top of the distillation tower during the intermittent rectification process byvirtue of setting the feed temperature range.

Description

technical field [0001] The invention relates to the field of distillation in the chemical industry, and more specifically relates to a device and method for automatically controlling the reflux ratio temperature of a rectification tower. Background technique [0002] The distillation operation in the chemical industry is one of the important operations in chemical production. During the rectification operation, the operating parameters of the rectification tower are determined according to the composition of the raw material liquid and the specific composition requirements for the raffinate and products. In the batch or continuous rectification operation, it is often necessary to adjust the reflux Ratio realizes the operating parameters of the rectification column. The ratio of reflux to output in the rectification column is called the reflux ratio. If the output is zero (also known as total reflux), the reflux ratio is infinite. In actual operation, it is often necessary t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D3/42
Inventor 束世平卫国朱志亮殷红燕
Owner SHANGHAI RES INST OF CHEM IND
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