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Online resistance-capacitance type method and apparatus for analyzing water content in high temperature smoke

A high-temperature flue gas and moisture meter technology, applied in the direction of material impedance, sampling device, material resistance, etc., can solve the problems of flue gas dust wear and blockage, and achieve the effect of ensuring accuracy and reliability

Active Publication Date: 2006-07-12
NANJING ASSEN ENVIRONMENT TECH
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Problems solved by technology

[0013] 1) Dust-proof stainless steel sintered filter sampling device: solve the problem of flue gas dust wear and blockage in the process of flue gas online measurement

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  • Online resistance-capacitance type method and apparatus for analyzing water content in high temperature smoke
  • Online resistance-capacitance type method and apparatus for analyzing water content in high temperature smoke
  • Online resistance-capacitance type method and apparatus for analyzing water content in high temperature smoke

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Embodiment Construction

[0030] The principle and implementation method of the online resistance-capacitance high-temperature flue gas moisture meter will be described in detail below in conjunction with the attached drawings:

[0031] 1) The resistance-capacitance sensor includes a polymer film capacitive humidity sensitive element ( figure 1 C0 in), used to measure the moisture change in the high temperature flue gas;

[0032] 2) Pt100 platinum resistance smoke temperature sensor ( figure 1 Rt in ) is used to measure flue gas temperature change of high-temperature flue gas, and is used for temperature compensation of flue gas moisture measurement;

[0033] 3) Heater ( figure 1 Hr in), used to heat the polymer film capacitance humidity sensitive element ( figure 1 C0) in the flue gas to prevent moisture condensation in the flue gas from corroding and damaging the humidity sensitive element of the polymer film capacitor ( figure 1 C0 in ),

[0034] 4) The above three together constitute the ...

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Abstract

The online RC high-temperature smoke moisture device comprises: a RC humidity sensor with a macromolecular film capacitor humidity sensor and a temperature sensor and a heater (Hr) connected to a heating temperature controller, a high-frequency oscillation circuit with input end connected to said humidity sensor and output end connected to the following conversion circuit, a frequency / voltage conversion circuit to output voltage signal direct proportioned to water content and connect to the following compensation circuit and take zero point full scale calibration by a calibration circuit, a smoke compensation treatment circuit, and a current-to-voltage conversion circuit. Wherein, directed outputting the calibrated signal or through the current-to-voltage conversion circuit to display device. This invention ensures the precision and reliability to meet practical application request.

Description

technical field [0001] The invention relates to a high-temperature flue gas moisture analysis method, in particular to an online resistance-capacity high-temperature flue gas analysis method and an analysis instrument. Background technique [0002] High-temperature flue gas generally refers to the gas produced by coal-fired power generation projects in the thermal power industry. As a special medium, the general temperature range is 80-120 degrees, and it may reach 160 degrees under special circumstances. In addition, there are generally dust and dust in the flue gas. Acidic substances such as SO2, NOX, etc., how to overcome high temperature, high dust and acidic substances to ensure online measurement of flue gas moisture is a very difficult problem. At present, oxidation picks are generally used in China to measure the oxygen content in dry and wet flue gas. Obtaining flue gas moisture through calculation is an indirect measurement method. The m...

Claims

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Application Information

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IPC IPC(8): G01N27/12G01N27/02G01N1/24
Inventor 刘德允章曙
Owner NANJING ASSEN ENVIRONMENT TECH
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