On-line estimation system and method for gas-phase copolymerization impact-resistant polypropylene quality indexes

A quality index, polypropylene technology, applied in the direction of electrical program control, comprehensive factory control, comprehensive factory control, etc., can solve the problems of bounded deviation of the inference model, unknown statistical characteristics of external disturbances, etc.

Active Publication Date: 2014-10-15
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

For the inference model of complex industrial processes, there are bounded deviations, unknown statistical characteristics of external disturbances, and frequent brand switching. In recent years, particle filtering has become a related research hotspot. However, particle filtering technology applied to complex PP processes has not been reported yet.

Method used

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  • On-line estimation system and method for gas-phase copolymerization impact-resistant polypropylene quality indexes
  • On-line estimation system and method for gas-phase copolymerization impact-resistant polypropylene quality indexes
  • On-line estimation system and method for gas-phase copolymerization impact-resistant polypropylene quality indexes

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Embodiment 1

[0070] The present invention is applied to polypropylene production equipment, and the technical process of the equipment is referred to image 3 . The device adopts the Spheripol-II generation polypropylene technology of Italy Basell Company, and was completed and put into production in October 2006. The designed production capacity of the device is 300,000 tons / year of polypropylene granules, and the annual operation is 8,000 hours. It can produce homopolymers (56 grades), random copolymers (21 grades), and impact copolymers (26 grades). There are 103 product grades, covering a wide range of product uses and advanced technical indicators. The device consists of raw material refining, pre-polymerization and loop reactor bulk absolute polymerization, polymer degassing and recovery of propylene and hydrogen, gas phase copolymerization, polymer steaming and drying, additives and extrusion granulation, product blending and Homogenization, air transport and storage units. refer...

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Abstract

An on-line estimation system for gas-phase copolymerization impact-resistant polypropylene (PP) product quality indexes which is directed at gas phase fluidized bed production technology. The on-line estimation system for the gas-phase copolymerization impact-resistant polypropylene (PP) product quality indexes includes a field product instrument, afield analysis instrument, a distributed control system (DCS), a laboratory analysis data server and an advanced control server which are connected with a gas phase PP object. The advanced control server includes an OPC client and a data interface module, an impact-resistance mark PP production process quality index model prediction module, and a PP quality index particle filter joint estimation and quality index display module. The invention also provides an on-line estimation method for the gas-phase copolymerization impact-resistant polypropylene quality indexes. The invention provides a real-time on-line estimation system and method for impact-resistant mark gas-phase copolymerization PP product quality indexes including a melt index, an ethylene mass fraction and impact resistance strength.

Description

(1) Technical field [0001] The invention relates to the field of industrial process control, and is an online estimation system for gas-phase copolymerized impact-resistant polypropylene quality indicators aimed at gas-phase fluidized bed production technology. (2) Background technology [0002] Polypropylene (polypropylene) is a thermoplastic resin obtained by polymerizing propylene. Polypropylene is a colorless, odorless, tasteless milky white highly crystalline polymer, and it is one of the lightest varieties of all plastics. It has good electrical properties and high-frequency insulation and is not affected by humidity, but it becomes brittle, not wear-resistant, and easy to age at low temperatures. It is suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. Common organic solvents such as acids and alkalis have little effect on it and can be used for tableware. At present, polypropylene is mainly produced by gas phase and bulk ...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P80/40Y02P90/02
Inventor 赵众宋峰于歌
Owner BEIJING UNIV OF CHEM TECH
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