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High-precision constant-current dilution time-sharing synchronous partition type CO measuring system for flue of coal-fired power plant

A technology of coal-fired power plants and measurement systems, which is applied in the direction of measuring devices, analysis materials, and cleaning methods using gas flow, etc., can solve problems such as uneven distribution, severe fluctuations in CO concentration, and measurement errors, so as to prevent surface ash from clogging, The effect of saving resources and prolonging the service life

Pending Publication Date: 2020-08-07
HUANENG INT POWER CO LTD YUHUAN POWER PLANT +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-precision constant-flow dilution time-sharing synchronous partitioned CO measurement system for the flue gas of a coal-fired power plant to solve the problem of measurement errors caused by severe fluctuations and uneven distribution of CO concentration in flue gas

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  • High-precision constant-current dilution time-sharing synchronous partition type CO measuring system for flue of coal-fired power plant

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Embodiment 1

[0035]In this embodiment, the number of the partition pressure regulating valves, high-precision constant flow dilution devices and partition sampling devices are all six, and the partition pressure regulating valves are respectively the first partition pressure regulating valve 4 and the second partition pressure regulating valve. Pressure regulating valve 5, pressure regulating valve 6 for the third zone, pressure regulating valve 7 for the fourth zone, pressure regulating valve 8 for the fifth zone, and pressure regulating valve 9 for the sixth zone; A high precision constant current dilution device 10, a second high precision constant current dilution device 11, a third high precision constant current dilution device 12, a fourth high precision constant current dilution device 13, a fifth high precision constant current dilution device 14 and a Six high-precision constant current dilution devices 15; the partition sampling devices are respectively the first partition sampli...

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Abstract

The invention discloses a high-precision constant-current dilution time-sharing synchronous partition type CO measuring system for a flue of a coal-fired power plant. The system comprises a zero gas system; a main pressure regulating valve is arranged on a pipeline at an outlet end; the main pressure regulating valve is connected with two passages through a pipeline, wherein one passage comprisesa plurality of partition pressure regulating valves which are connected in parallel and are arranged in sequence, high-precision constant-flow dilution devices and partition sampling devices, and theother passage is provided with a blowback pressure regulating valve and a multi-channel time-sharing synchronization system sequentially; the high-precision constant-flow dilution devices are connected with the multi-channel time-sharing synchronization system through a pipeline; the high-precision constant-current dilution devices and the partition sampling devices are connected and are in one-to-one correspondence with each other; the multi-channel time-sharing synchronization system comprises a high-precision CO instrument; the multiple partition sampling devices are uniformly arranged in the flue; and each partition sampling device comprises a partition sampling cavity, a filter element and a sampling probe rod. With the system adopted, the CO gas concentrations of different areas in the flue can be quickly and accurately detected, and a data basis is provided for judging whether the flue gas emission of the thermal power plant reaches standards or not.

Description

technical field [0001] The invention relates to a high-precision constant-flow dilution time-sharing synchronous partition type CO measuring system for a flue of a coal-fired power plant. Background technique [0002] Power plants generally use the oxygen in the flue gas as an adjustment parameter for boiler efficiency. However, oxygen data can only obtain the excess air coefficient of the boiler, which cannot well reflect the specific conditions of burner combustion and wind-coal mixing. CO is an incomplete combustion product in the combustion process, and its content directly reflects the unburned condition of the fuel, which can better explain the combustion efficiency. [0003] The existing CO content measurement mainly adopts the following two methods: 1. The single-point sampling scheme is used for measurement. Due to the uneven air distribution of the furnace, the aging of the furnace, the inclination of the flame, etc., the distribution of CO in the flue is uneven, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22B08B5/02
CPCB08B5/02G01N1/2258G01N2001/2264
Inventor 马巧春傅望安郑卫东韦玉华郭雷刘哲陈金丹李肖肖刘贵权
Owner HUANENG INT POWER CO LTD YUHUAN POWER PLANT
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