Temperature control system in catalyst production device, temperature control method and application of temperature control system

A technology of temperature control system and production device, applied in the direction of temperature control, control/regulation system, catalyst activation/preparation, etc., can solve the problems of large temperature fluctuation, hysteresis, adverse effects on product performance and quality of maleic anhydride catalyst, etc. The effect of quality improvement, overcoming large temperature fluctuations

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0006] In order to overcome the hysteresis problem of direct control of natural gas flow by temperature in the prior art, and excessive temperature fluctuations, resulting in adverse effects on the product performance and quality of maleic anhydride catalysts

Method used

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  • Temperature control system in catalyst production device, temperature control method and application of temperature control system
  • Temperature control system in catalyst production device, temperature control method and application of temperature control system
  • Temperature control system in catalyst production device, temperature control method and application of temperature control system

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Embodiment 1

[0071] The implementation of the temperature and pressure cascade control method in the maleic anhydride catalyst preparation process mainly includes the following steps:

[0072] (1) The control method in the process is changed from temperature single-loop control to temperature and pressure cascade control. Through the programming configuration of the engineer station and the PLC control system, the pressure of the natural gas is controlled by the temperature of the sugar coating pan, and then the flow of the natural gas is adjusted. Among them, the temperature loop is the main loop, and the pressure loop is the secondary loop to directly control the flow of natural gas. On-site commissioning determines the initial PID parameters of the main and auxiliary loops.

[0073] (2) In the temperature control, a PID fuzzy controller is designed to transform the temperature deviation and the rate of change of the deviation into the corresponding basic domain, and the temperature dev...

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Abstract

The invention belongs to a design of temperature control in an intermittent catalyst production process, belongs to the field of automatic control of production processes, and in particular relates to a method for controlling the process reaction temperature of a sugar coating pot serving as main equipment in a maleic anhydride catalyst production device. A proportion integration differentiation (PID) fuzzy controller is researched and developed; and aiming at the characteristics of high temperature inertia in the sugar coating pot, obvious time lag, high coupling and difficulty in establishing an accurate mathematical model in the maleic anhydride catalyst preparation process, the temperature deviation in a maleic anhydride catalyst control system is controlled by adopting the controlling method combining fuzzy control and cascade control, so that automatic control of the temperature in the pot is realized. The application shows that the control algorithm completely meets the control requirements of the temperature parameters of the sugar coating pot, the dynamic performance of the system is improved and the performance and the quality of a maleic anhydride catalyst product are improved.

Description

technical field [0001] The invention belongs to the design of temperature control in the intermittent production process of catalysts, and belongs to the field of automatic control of the production process. In particular, the invention relates to a method for controlling the process reaction temperature of the main equipment sugar coating pan in a maleic anhydride catalyst production device. Background technique [0002] Maleic anhydride catalyst is an important organic chemical raw material, and has a wide range of industrial applications. The production of maleic anhydride catalyst is a batch production process, and the main process equipment for catalyst preparation in the device is sugar coating pan. The diagram of the control flow of the sugar coating pan is shown in figure 1 . The sugar-coating pan is a rotatable pot with variable frequency motor speed regulation. The granular material carrier is added to the pot. There are multiple natural gas burners under the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/20B01J37/08C07D307/60
Inventor 吴小英孙康刘瞻吴瑾李庆
Owner CHINA PETROLEUM & CHEM CORP
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