Microwave measuring device for detecting the charge of a two-phase flow

A microwave measurement and fluid technology, which is used in measurement devices, liquid/fluid solid measurement, and material analysis using microwave methods, can solve problems such as complex installation, insufficient measurement accuracy, and air flow conditions, and achieve economical structure and measurement results. Accurate, Simple Cost Results

Inactive Publication Date: 2005-05-18
PROMECON PROZESS & MESSTECHN CONRADS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In any case, for the preferred application of determining the loading of gas flows of solid particles in large-capacity pneumatic solids transport systems of the type employed, for example, in pulverized coal combustion systems of coal-fired power stat

Method used

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  • Microwave measuring device for detecting the charge of a two-phase flow
  • Microwave measuring device for detecting the charge of a two-phase flow

Examples

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Embodiment Construction

[0021]The figure depicts a section of a feed line 1 for pneumatically conveying pulverized coal in a partially cutaway manner. The feed pipe 1 is of the type usually used in pulverized coal fired furnaces in power stations. The feed pipe 1 is made of corrosion-resistant steel. It has an approximately circular cross-section with a diameter D=200mm. The transmitting antenna 2 and the receiving antenna 3 extend from the outside into the feeding pipe, are installed continuously at intervals of 300 mm in the longitudinal direction of the feeding pipe, and form a measuring path S. Microwaves with a frequency between 840 and 860 MHz are coupled through the transmission antenna 2 . These microwaves correspond to the waveguide fundamentals of the feed pipe 1 . Along the longitudinal direction of the feeding pipe 1, in front of the transmission antenna 2 and behind the receiving antenna 3, in the polarization plane of the input microwave, there are field rods 4 and 5 extending radial...

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Abstract

The invention relates to a microwave measuring device for determining the load of a two-phase fluid having a gaseous carrier medium containing fine and minute solid and/or liquid particles, and for determining the gas contained in the fluid flow, preferably by The way of waveguide carrier. A preferred application of the invention is for the determination of solid particles contained in gas streams of large volume pneumatic solids transport systems, for example in pulverized coal furnaces of coal-fired power stations. The inventive microwave measuring device is provided with field rods protruding into the feed pipe, arranged in front of and behind the measuring section formed by the transmitting and receiving antennas, said field rods being made of conductive material The feed duct intersects, as a resonator for the microwaves input into the feed duct via the transmission antenna, as a result of diffraction, overlap and/or reflection outside the measurement section microwaves in their plane of polarization and/or phase different from the input microwaves Essentially shorted to prevent distortion of measurements. The inventive device has the particular advantage of being simple in construction and easy to install even in large-volume and branched feed pipeline systems.

Description

technical field [0001] The invention relates to a microwave measuring device for determining the load of a two-phase fluid comprising a gaseous carrier medium with fine and minute solid and / or liquid particles, and for determining the gas contained in the fluid flow. A preferred field of application of the invention relates to the determination of the load of gas streams laden with solid particles in such large-capacity pneumatic solids transport systems, for example in pulverized coal furnaces of coal-fired power stations. Background technique [0002] Methods for determining the loading of two-phase fluids comprising a gaseous carrier medium by means of microwaves, as well as the proportion of gas contained in the fluid flow, are known. In many such known systems, microwaves of certain frequencies are coupled into a portion of a feed duct intended to be used as a measurement duct, and any changes in microwave amplitude and phase are recorded at the end of the duct. The pr...

Claims

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Application Information

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IPC IPC(8): G01F1/66G01F1/74G01N15/06G01N22/00
CPCG01F1/662G01F1/74G01N15/0656G01N22/00
Inventor 汉斯·G·康拉德斯沃尔克哈德·克卢普希亚历山大·哈尔姆
Owner PROMECON PROZESS & MESSTECHN CONRADS
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