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Two-phase flow parameter monitoring method and system

A flow parameter and monitoring system technology, applied in fluid velocity measurement, measurement device, velocity/acceleration/impact measurement, etc., to solve problems such as opacity of pipes and pulsating flow

Inactive Publication Date: 2009-07-08
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, the pipeline is basically opaque, and the pulverized coal often has flow patterns such as pulsating flow and dense flow during the pneumatic conveying process, which has become a major obstacle to the application of optical detection methods

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  • Two-phase flow parameter monitoring method and system
  • Two-phase flow parameter monitoring method and system
  • Two-phase flow parameter monitoring method and system

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Embodiment Construction

[0021] The two-phase flow used in the practice of industrial and agricultural production generally consists of a carrier phase (such as the air in the above-mentioned pulverized coal-air two-phase flow) and a working fluid phase (such as the above-mentioned pulverized coal-air two-phase flow) as a working medium. Coal powder in air two-phase flow) composition. In gas-solid two-phase flow, the solid phase is the working fluid phase, and the gas phase is the carrier phase. In this specification, the present invention is described by taking gas-solid two-phase flow as an example. However, those skilled in the art should understand that, based on the teaching herein, the present invention can of course be applied to other forms of two-phase flow, such as gas-liquid two-phase flow.

[0022] Next, methods for measuring solid phase concentration, two-phase flow velocity and mass flow rate according to the present invention will be introduced.

[0023] Solid phase (working fluid p...

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Abstract

The invention discloses a method and a system for monitoring flow parameters of two-phase flow. According to the invention, a two-phase flow pipeline to be monitored comprises at least one dielectric material pipe formed by dielectric material; at least one pair of electrode plates is twisted into a spiral shape in the same way along the longitudinal direction on the outer surface of the dielectric material pipe; on the outer surface of the dielectric material pipe, an upstream position and a downstream position on one side of the at least one pair of electrode plates are provided with identical capacitance sensors in the same way; when the two-phase flow flows through the dielectric material pipe, capacitance induced on the at least one pair of electrode plates and random time sequence signals induced on an upstream capacitance sensor and a downstream capacitance sensor respectively are detected; and the volume concentration of a working-medium phase in the two-phase flow and the flow velocity of the two-phase flow are calculated according to the detected signals, and then the mass flow rate of the working-medium phase in the two-phase flow can be figured out.

Description

technical field [0001] The invention relates to the monitoring of flow parameters of two-phase flow, especially the monitoring of flow parameters of gas-solid two-phase flow. Background technique [0002] Two-phase flow such as gas-solid two-phase flow is widely used in industrial production practices such as electric power, metallurgy, and pharmaceuticals. For example, in the fields of electric power and metallurgy, pulverized coal is transported by pneumatic force, which is a typical gas-solid two-phase flow. This pneumatic conveying technology can improve combustion efficiency, improve the production environment, and reduce labor intensity, so it helps to solve the increasingly prominent problems of coal-burning energy waste and environmental degradation. [0003] In the power industry, the reasonable distribution of coal combustion and combustion-supporting air is one of the basic conditions for optimal combustion of large boilers. For coal-fired boilers, the pulverize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/22G01P5/22
Inventor 王玉涛陆增喜杨钢
Owner NORTHEASTERN UNIV
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