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Method and apparatus for measuring chimney heat exchanger air leakage ratio

A heat exchanger and air leakage rate technology, applied in the field of measurement, can solve the problems of errors and the loss of reference value of air leakage rate, and achieve the effect of reducing measurement errors and improving accuracy

Inactive Publication Date: 2004-03-31
马克文 +1
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  • Abstract
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Problems solved by technology

However, due to the error of each oxygen analyzer, there is a large error between the measured oxygen content value and the real oxygen content value in the flue gas due to the difference between the errors of the two sensors. In severe cases, the measured air leakage rate loses its reference value

Method used

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  • Method and apparatus for measuring chimney heat exchanger air leakage ratio
  • Method and apparatus for measuring chimney heat exchanger air leakage ratio
  • Method and apparatus for measuring chimney heat exchanger air leakage ratio

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Embodiment

[0026] A device used to measure the air leakage rate of the flue heat exchanger (such as figure 1 , Figure 2, Figure 3), including measuring pipeline (M), intake valve (A1, B1, A2, B2), measuring head (O1, O2), air leakage meter controller (F), suction pump ( D), drain valve (C1, C2), etc. There are two sampling ports (E1, E2) at the front end of the measuring pipeline (M), which are respectively connected with the inlet flue gas and the outlet flue gas of the heat exchanger. The two output ends of the measuring pipeline are connected to the measuring head (O1, O2), and the measuring pipeline branch is equipped with intake valves (A1, B1, A2, B2), which can be carried out according to the command of the air leakage meter controller (F) The valve is switched to control the passage and blocking of the flue gas. An air pump (D) and a flow meter (L1, L2) are installed at the back of the measuring pipeline. Such as figure 1 , As shown in Figure 2.

[0027] Perform the following steps w...

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Abstract

A method for measuring the ventilation leakage ratio of chimney flue heat interchanger, wherein more than two zirconium oxide sensing device gauge pin are used for the sampling measuring to the flue gas oxygen content at the outlet and entrance of the heat exchanger alternatively, the measured outlet flue gas oxygen content value is compared with the entrance flue gas oxygen content value and accumulated, and an average value is calculated using the average value as the outlet flue gas oxygen content and the entrance flue gas oxygen content value, based on them for calculating the ventilationleakage ratio of chimney flue heat interchanger. The invention also discloses the apparatus for realizing the method.

Description

Technical field [0001] The invention relates to the field of measurement, in particular to a method and equipment for measuring the air leakage rate of a flue heat exchanger. Background technique [0002] At the end of the exhaust flue of industrial boilers, a heat exchanger is often used to heat the combustion air, so as to make full use of the heat in the boiler flue gas to reduce the exhaust gas temperature and improve the efficiency of the boiler. [0003] According to the heat transfer method, heat exchangers are divided into two types: heat transfer and heat storage. In heat transfer heat exchangers, heat is continuously transferred from flue gas (exothermic gas) to air (absorption) through the heat transfer surface. Hot gas), flue gas and air each have their own channels. In a regenerative heat exchanger, flue gas and air alternately pass through the metal heating surface of the heat exchanger. When the flue gas flows over the heating surface, heat is transferred from the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/28
Inventor 陈文华马克文赵津生
Owner 马克文
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