Humidity measuring method and measuring device used for CEMS system
A humidity measurement and humidity technology, which is applied in the field of humidity measurement method and measurement device of CEMS system, can solve the problems of short service life and large measurement error of humidity sensor, and achieve unaffected measurement accuracy, long service life and extended service life. Effect
Inactive Publication Date: 2013-01-09
南京智昊置业有限公司
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Problems solved by technology
[0018] The problem to be solved by the present invention is to provide a humidity measuring device that can be used for a long time and is not afraid of dust and corrosion in view of the problems of short life of the humidity sensor or large measurement error in the humidity measurement of the desulfurization CEMS system of the existing power plant
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[0030] The present invention obtains their humidity ratio through the flow ratio of different pipelines, and then obtains the humidity value of one of the pipelines, and separates the moisture in the flue gas to be measured in the flue through the Nafion drying tube into the pipeline with dry air, and detects Obtain the moisture humidity of the pipeline. The humidity of the air can be commonly understood as the degree of humidity of the air. It is divided into absolute humidity and relative humidity. It is difficult to directly measure the density of water vapor in the air, and the pressure of water vapor increases with the increase of water vapor density. , so absolute humidity refers to the pressure of water vapor in the air; relative humidity is a concept introduced to indicate the distance of water vapor in the air from the saturated state,
[0031] According to the humidity conversion formula: relative humidity = (absolute humidity / saturated vapor pressure) × 100%
[0...
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The invention discloses a humidity measuring method and a measuring device used for CEMS system, moisture in flue gas to be detected in a flue is separated to an independent pipeline introduced with dry air by a Nafion drying tube, humidity of separated moisture is detected, and humidity of flue gas to be detected is obtained. The invention provides the humidity measuring method and the device which is applicable for long term usage and is resistant to dust and corrosion, and has an excellent application effect on CEMS system. Accuracy of measurement is not affected, and the service life of ahumidity sensor is long. The invention solves the problem that the humidity sensor for moisture measurement on CEMS system in desulphurization of a domestic power plant is liable to be blocked by dustin the flue and corroded by aggressive gas in the flue which results in the current situation of the very low service life of the sensor, has wide application prospect and wide application rang, is suitable for measurement of humidity in high corrosive environment with large amount of dust and is especially suitable for application of humidity measurement on CEMS system in the power plant.
Description
technical field [0001] The invention is used for measuring humidity in an environment with high dust and high corrosiveness, especially for the application of humidity measurement on a CEMS system in a power plant, and is a humidity measuring method and a measuring device for a CEMS system. Background technique [0002] In the early days in China, the principle of dry and wet oxygen measurement was used to convert it into flue gas humidity, but the measurement error of this measurement method is very large. The reason is that the dryness of dry oxygen is not uniform, followed by the measurement accuracy and stability of dry and wet oxygen instruments. The humidity is different. In practical applications, the calculated humidity is often negative. [0003] At present, the continuous on-line humidity monitoring of flue gas desulfurization in power plants used in China is directly measured by the humidity sensor installed in the flue. The resistance value and capacitance value...
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IPC IPC(8): G01N33/00G01N1/34
Inventor 俞斌康运奇杜煜刘浏周黎辉
Owner 南京智昊置业有限公司