Online purging system for venturi measuring tube in primary air duct of thermal power plant
A measuring tube and Venturi technology, applied in the field of purging system, can solve problems such as heavy workload and easy burns, and achieve the effect of ensuring accuracy
Pending Publication Date: 2018-01-26
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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Problems solved by technology
[0003] The invention provides an online purging system for the Venturi air volume measuring tube in the primary air duct of a thermal power plant, which solves the problems of heavy workload and easy occurrence of burn accidents in the dust cleaning of the Venturi measuring tube
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[0009] The present invention is described in detail below in conjunction with accompanying drawing:
[0010] An on-line purging system for Venturi air flow measuring tubes in a primary air duct of a thermal power plant, comprising a primary air inlet duct 1, a Venturi measuring tube support frame 2 is arranged in the primary air inlet duct 1, and a venturi measuring tube support frame 2 is arranged in the Venturi measuring tube A Venturi measuring tube 3 is fixedly installed on the support frame 2. The central axis of the Venturi measuring tube 3 and the central axis of the primary air inlet duct 1 are arranged parallel to each other. Transmitter 5, a differential pressure tube 4 is connected between the Venturi measuring tube 3 and the differential pressure transmitter 5, on the inner wall of the primary air inlet tube 1 above the front side of the air inlet of the Venturi measuring tube 3 A compressed air inlet pipe 6 is provided, and the central axis of the compressed air i...
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The invention discloses an online purging system for a venturi measuring tube in a primary air duct of a thermal power plant and solves the problem that dust cleaning for a venturi measuring tube requires high workload and easily causes burn. A compressed air incoming tube (6) is arranged on the inner wall of a primary air incoming tube (1) above the front of an air inlet of a venturi measuring tube (3), the axis of the compressed air incoming tube (6) is mutually perpendicular to that of the primary air incoming tube (1), the lower end of the compressed air incoming tube (6) is connected witha purging nozzle tube (7), the axis of the purging nozzle tube (7) is 45 degrees angled to that of the primary air incoming tube (1), the part of the compressed air incoming tube (6) extended out ofthe primary air incoming tube (1) is provided with a compressed air shut-off valve (8), and the upper end of the compressed air incoming tube (6) is connected with a compressed air incoming line (9).Venturi measuring accuracy and production progress safety are ensured.
Description
technical field [0001] The invention relates to a purging system of an air volume measuring device in a boiler air duct of a thermal power plant, in particular to an online purging system of a Venturi measuring tube used for measuring air volume in a primary air duct or a secondary air duct of a thermal power plant boiler. Background technique [0002] At present, primary air passages and secondary air passages are provided on boilers of thermal power plants to provide air volume for boiler combustion. In order to control the air volume of the boiler and improve the combustion efficiency of the boiler, an air volume measuring device is generally installed in the air duct. The air flow measurement device is composed of a differential pressure measuring tube and a differential pressure transmitter; there are many types of differential pressure measuring tubes, among which the Venturi measuring tube is more commonly used. The Venturi measuring tube can measure the dynamic pres...
Claims
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IPC IPC(8): G01F1/44G01F15/18
Inventor 刘众元梁五洲邢秀峰李凯勇武晓俊刘建华刘志兵霍慧英潘燕龙
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER