Production device for acrylic nitrile and method for controlling temperature of reactor

A technology for production devices and reactors, which is applied to electric controllers, controllers with specific characteristics, and temperature control using electric methods, which can solve the problem of increasing the burden on the actuator, shortening the service life of the actuator, and frequent changes in control quantities. problems, to achieve the effect of stable temperature control, stable changes and long service life

Inactive Publication Date: 2008-10-15
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Fluidized bed reactor temperature control is very unstable
At the same time, the control amount of the propylene feed

Method used

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  • Production device for acrylic nitrile and method for controlling temperature of reactor
  • Production device for acrylic nitrile and method for controlling temperature of reactor
  • Production device for acrylic nitrile and method for controlling temperature of reactor

Examples

Experimental program
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Embodiment Construction

[0025] Acrylonitrile production device of the present invention, its preferred embodiment is as figure 1 As shown, the reactor is included, and the reactor is provided with a temperature control loop, and the temperature control loop includes a GPC controller and a feed control loop. The output end of the GPC controller is connected with the input end of the feed control loop, and the two form a cascade control loop.

[0026] When performing temperature control, the GPC controller first uses the GPC control algorithm to correct the set value of the feed flow rate of the reactor according to the temperature information of the reactor, and obtains the actual set value of the feed flow rate; The material control loop adjusts the feed flow rate to realize the control of the reactor temperature. Through the two-stage control, the temperature control of the reactor can be stabilized, the change of the actuator is stable, and the service life is long.

[0027] The specific feed con...

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PUM

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Abstract

The invention discloses an acrylonitrile production device and a method for controlling the temperature of a reactor thereof, wherein, the acrylonitrile production device comprises a GPC controller and a PID feeding control circuit, and the output end of the GPC controller is connected with the input end of the PID feeding control circuit. When the temperature control is performed, firstly, a GPC control algorithm is adopted to modify a preset value of feeding flow of a reactor, according to the preset temperature information and the actual temperature information of the reactor, to obtain an actual preset value of the feeding flow; then the feeding flow is adjusted through the PID algorithm to realize the control to the temperature of the rector. The method can ensure that the reactor has steady temperature control, steady change of an actuating mechanism, and long service life.

Description

technical field [0001] The invention relates to an acrylonitrile production equipment and process, in particular to an acrylonitrile production device and a method for controlling the temperature of a reactor. Background technique [0002] Acrylonitrile is the main raw material for producing polyacrylonitrile fiber, and has a broad market space. [0003] The production process of propylene ammoxidation in the prior art is that in a fluidized bed reactor, propylene, ammonia and air generate acrylonitrile and other by-products under the action of a catalyst. The production process of acrylonitrile is roughly divided into five parts: synthesis, separation, post-treatment, acetonitrile, and sulfur ammonia. [0004] The core of the acrylonitrile production plant is a fluidized bed reactor. Liquid propylene and liquid ammonia enter the acrylonitrile production unit, and after passing through the propylene and ammonia evaporation system, they form two streams of gas that are mixe...

Claims

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Application Information

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IPC IPC(8): C07C255/03C07C253/02G05D23/19G05B11/42
Inventor 薛美盛刘云松王伟张毅孙德敏
Owner UNIV OF SCI & TECH OF CHINA
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