Automatic control system and method for controlling reflux of light component removal rectifying tower

An automatic control system and a technology for removing light components, which are applied in the field of chemical industry and automatic control of chemical production, and can solve the problems of automatic control systems or methods that do not disclose the discharge ratio of the reflux tank.

Active Publication Date: 2013-12-04
BLUESTAR BEIJING TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] There is no automatic control system or method for the

Method used

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  • Automatic control system and method for controlling reflux of light component removal rectifying tower
  • Automatic control system and method for controlling reflux of light component removal rectifying tower
  • Automatic control system and method for controlling reflux of light component removal rectifying tower

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Embodiment Construction

[0030] Such as figure 2 As shown, the automatic control system for controlling the reflux ratio of the distillation column according to the present invention includes a distillation column 1, a reflux tank 2, an optional heat exchanger 3 and a first actuator 4, and the reflux tank 2 is communicated with the distillation column for The reflux of the overhead fraction. The system also includes: an actuator 5, arranged on the discharge pipeline of the reflux tank 2, for adjusting the reflux ratio of the fraction in the reflux tank; a pressure controller 10, which collects the pressure value of the distillation column 1 (preferably the top 1b), according to This pressure value provides pressure control variable to signal selector 11; Temperature controller 9, it collects the temperature value of reflux tank 2, provides temperature control variable to signal selector 11 according to this temperature value; By comparing the pressure control variable of the controller 10 and the te...

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Abstract

The invention provides an automatic control system for controlling the reflux of a light component removal rectifying tower. The automatic control system comprises a reflux drum communicated with a rectifying tower, an executing mechanism arranged on a discharge pipeline of the reflux drum and used for regulating the reflux ratio of fractions in the reflux drum, a pressure controller for acquiring the pressure value of the rectifying tower and providing the pressure control variable for a signal selector according to the pressure value, a temperature controller for acquiring the temperature value of the reflux drum and providing the temperature control variable for the signal selector according to the temperature value, and the signal selector for receiving the pressure control variable and the temperature control variable, and selecting one of the variables to control the opening of the executing mechanism. Through the correlation of the temperature and the pressure parameter in the system with the action of the discharge valve of the reflux drum, the action of the discharge valve is controlled in real time according to the state in the system, so that the product quality unstability or the material waste due to excessive emission is avoided.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to the field of automatic control of chemical production. Background technique [0002] In the chemical industry, it is almost an essential operation to separate a variety of substances with different specific gravity and boiling point. This is usually carried out in a distillation tower or a separation tower (usually a rectification tower), and heat is supplied to the distillation tower through a heating device , output light distillate or low boiling point distillate from the top of the tower, and heavy distillate or high boiling distillate stay in the bottom of the tower and separate from the bottom of the tower. The heating unit is usually a coil of tubing that surrounds a portion (usually the lower portion) of the distillation column through which a heating medium (typically oil, water, gas, etc.) flows. In order to adjust the heat supply and control the tower temperature, it ...

Claims

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Application Information

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IPC IPC(8): B01D3/42
Inventor 李振刚苏岳龙梁桂花黄玲倪华方
Owner BLUESTAR BEIJING TECH CENT
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