Method and device for detecting air volume in air passage

A detection method, air duct technology, applied in the direction of measuring devices, volume measurement and fluid transport, testing of machine/structural components, etc., can solve the problems of impracticability, high cost, increase of power plant operation and maintenance costs, etc., and achieve low cost , the effect of accurate detection

Active Publication Date: 2011-07-06
NORTH CHINA ELECTRICAL POWER RES INST +1
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Problems solved by technology

The cost of such a transformation is greater, and sometimes it cannot be realized at all due to the limitation of the original layout of the unit
Therefore, these two transformation methods will greatly increase the operation and maintenance costs of the power plant.

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  • Method and device for detecting air volume in air passage
  • Method and device for detecting air volume in air passage
  • Method and device for detecting air volume in air passage

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] The air duct air volume detection method and device of the present invention use computational fluid dynamics (Computational Fluid Dynamics, CFD for short) technology to process the primary air duct, especially the primary air duct at the entrance of the coal mill, and then obtain the air volume of the primary air duct data, and the measurement is accurate, there is no need to modify the primary air duct, the cost is low, and the measurement accuracy will not...

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Abstract

The invention provides a method and a device for detecting air volume in an air passage, and the method comprises the following steps: acquiring data of geometric size of the air passage; dividing the air passage into a plurality of detecting grids for detecting the air passage according to the data of the geometric size of the air passage; detecting the data of primary air at an inlet of the air passage; obtaining the data of the primary air at each grid node in each detecting grid according to the detected data of the primary air at the inlet of the air passage; and obtaining the air volume in the air passage according to the data of the primary air at each grid node in each detecting grid. By adopting the method and the device for detecting the air volume in the air passage, and the CFD (computational fluid dynamics) technology is utilized, so that accurate detection of the primary air volume in the primary air passage under the situation of low cost is realized.

Description

technical field [0001] The invention relates to a method and a device for detecting the air volume of an air duct, in particular to a method and a device for detecting the primary air volume of a primary air duct. Background technique [0002] It is very important to detect the primary air volume of the primary air duct, especially the primary air duct in large power plant boilers, because the primary air volume is of great significance to combustion, not only related to the operation safety of the unit, but also related to the energy saving of the unit optimization. [0003] In the existing power plant boiler pulverization system of medium-speed coal mills, non-standard speed measuring components (such as wing-type air volume measuring devices, Venturi flowmeters, Annubar flowmeters, etc.) are generally used in the coal mill Inlet flue for primary air volume measurement. [0004] figure 1 A schematic diagram of the primary air duct used for the medium-speed coal pulveriz...

Claims

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Application Information

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IPC IPC(8): G01F13/00G01M10/00
Inventor 朱宪然赵振宁张清峰
Owner NORTH CHINA ELECTRICAL POWER RES INST
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