Dynamic monitoring method for gas solid fluidized bed and system thereof

A dynamic monitoring and fluidized bed technology, applied in chemical instruments and methods, chemical/physical processes, etc., can solve the problems of immature signal acquisition methods and processing methods for characterizing fluid states, and limited application range

Inactive Publication Date: 2005-01-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the randomness of fluidized bed fluid state changes, this type of monitoring method has certain advantages, but because the acquisition method and processing method of the signal representing the fluid state are still immature, the practical application range of this type of method is also quite limited

Method used

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  • Dynamic monitoring method for gas solid fluidized bed and system thereof
  • Dynamic monitoring method for gas solid fluidized bed and system thereof
  • Dynamic monitoring method for gas solid fluidized bed and system thereof

Examples

Experimental program
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Embodiment Construction

[0012] Such as figure 1 As shown, the gas-solid fluidized bed dynamic monitoring system has a fluidized bed body 3, a gas distribution plate 2 and an air chamber 1 are arranged at the bottom of the fluidized bed body 3, and an electrical capacitance tomography sensor is arranged on the outer wall of the middle part of the fluidized bed body 4. The pressure sensor 5 and the capacitance tomography sensor 4 are connected with the weak capacitance measurement module 7, the data acquisition system 8 and the computer 9 in sequence, and the pressure sensor 5 is connected with the A / D conversion card 6 and the computer 9 in sequence.

[0013] Such as figure 2 The wavelet decomposition and multi-scale analysis are performed on the pressure fluctuation signal collected by the pressure sensor, and the flow state is discriminated by using the scale energy percentage as the characteristic value. Using the capacitance value measured by the capacitance tomography sensor as projection data,...

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Abstract

The invention discloses a dynamic supervising method for gas-solid fluidized bed and the system. The method is: using wavelet analysis technology to analyze the pressure vibration signal, judging its flow state, displaying the flow state with capacitance chromatography imaging technology, measuring the aperture rate and its vibration of the fluidized bed, extracts the character value and carries on flow state judgment, using multi-sensor information melting technology to carry on flow state judgment, upgrading the accuracy of the judgment. The supervising system has a fluidized bed main body, under which there has a gas distribution board, gas chamber, on the external wall in the middle of the main body there arranges a capacitance chromatography imaging sensor, pressure sensor, the capacitance chromatography imaging sensor is connected to the tiny capacitance measuring model, data collecting system, and computer, the pressure sensor is connected to A/D converting card, and computer.

Description

technical field [0001] The invention relates to a dynamic monitoring method and system for a gas-solid fluidized bed. Background technique [0002] Gas-solid fluidized bed is an important chemical reactor, which is widely used in chemical industry, petrochemical industry, metallurgical industry, biochemical industry, combustion, energy, environmental protection, semiconductor materials and other industrial production. The fluid state of the fluidized bed (i.e. fixed bed, bubbling bed, turbulent bed, fast bed, etc.) has an important impact on the gas-solid contact, heat transfer, and mass transfer in the reaction device, and is directly related to the reactor's performance. Productivity, yield and selectivity. At the same time, most systems remain in a certain stable flow state during practical applications. The change of the flow state will have a huge impact on the industrial process, and even cause accidents, so the real-time display and monito...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24
Inventor 黄志尧冀海峰谢代梁王保良李海青
Owner ZHEJIANG UNIV
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