Dynamic fault diagnostic method of polymer aggregation in gas-solid fluidized bed reactor

A fluidized bed reactor, fault diagnosis technology, applied in the processing of detection response signals, using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve problems such as agglomeration faults, and achieve the effect of convenient installation and use
CN101738435AInactive Publication Date: 2010-06-16ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2010-06-16
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a dynamic fault diagnostic method of polymer aggregation in a gas-solid fluidized bed reactor. By using the method, a fault detection variable set formed by a plurality of key variables which have influence on the fault aggregation is selected, a fault diagnostic model by applying a multi-component dynamic principle component analysis theory is established and a control limit for detecting whether faults generate or not by combining with a nuclear density estimation technology is determined. The invention avoids the complicated process mechanism analysis, has the remarkable advantages of directly utilizing the existing measurement variable of DCS, not needing to add any hardware investment or installing any equipment, adding a section of functional module only in a DCS engineers and having convenient installation and use besides the advantages of non-inserting type, safety, environmental protection and accurate sensitivity.
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Description

technical field

[0001] The invention belongs to the technical field of fault diagnosis of a gas-solid fluidized bed reactor, in particular to a fault diagnosis method for polymer agglomeration in a gas-solid fluidized bed reactor. Background technique

[0002] The gas-phase polyethylene method with the gas-solid fluidized bed reactor as the core equipment is the mainstream process in the current polyethylene production. It has the advantages of short process flow, less equipment, and low production cost. It does not use solvents and saves solvent separation, Recycling and refining, full density polyethylene products can be produced on the same device, and the energy consumption is greatly reduced. However, this process also has the outstanding problem of easy caking. In actual production, due to static electricity in the reactor, too high or too low bed material level, blockage of distribution plate, decrease of fluidization gas velocity, sudden change of catalyst activity,...

Claims

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