Combustion type gas heat value measuring method and heat value meter thereof

Abstract

The disclosed combustion-type measurement method for gas heat value comprises: with gas coupling device and combustion-supporting air transmission device, conveying some gas and combustion-supporting air into combustion furnace for complete combustion to produce smoke; measuring the residual oxygen content in smoke to calculate the gas heat value. This invention can not be affected by environmental temperature, has no hysteretic phenomenon, needs small maintenance labor and low cost, and runs stably.

Description

technical field [0001] The invention relates to a method and device for measuring the calorific value of gas, in particular to a method for measuring the calorific value of combustion-type gas and a calorific value instrument thereof. Background technique [0002] In the management and application of natural gas, producer gas, biogas, coke oven, blast furnace, converter gas and various mixed gas in metallurgical industry, the calorific value of gas is a basic and important parameter, and timely and accurate measurement of gas Calorific value is of great significance to scientifically and rationally organize the energy balance of communities and enterprises, produce and efficiently utilize gas heat energy, and save energy; at present, there are the following methods for measuring calorific value, (1) component analysis method, component analysis The method is to use a gas chromatograph to separate each chemical component in the gas and calculate the cumulative calorific value...

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Problems solved by technology

[0002] In the management and application of natural gas, producer gas, biogas, coke oven, blast furnace, converter gas and various mixed gas in metallurgical industry, the calorific value of gas is a basic and important parameter, and timely and accurate measurement of gas Calorific value is of great significance to scientifically and rationally organize the energy balance of communities and enterprises, produce and efficiently utilize gas heat energy, and save energy; at present, there are the following methods for measuring calorific value, (1) component analysis method, component analysis The method is to use a gas chromatograph to separate each chemical component in the gas and calculate the cumulative calorific value of the gas. The gas chromatograph used in this method requires frequent maintenance and is expensive; (2) gas resistance The gas resistivity method is to measure the resistivity of the gas through the electric bridge, which has poor measurement accuracy; (3) calorimetric measurement method; at present, this calorimetric measurement method is mostly used

[0003] In the prior art, the combustion calorific value instrument measured by calorimetry is composed of a conveying and processing device for gas and combustion-supporting air, a measuring device for gas and combustion-supporting air flow, a combustion furnace barrel, a furnace temperature measuring device, a display calorific value device, and It is composed of a box and connected auxiliary devices. It uses gas combustion to generate heat. The furnace temperature changes with the change of the gas calorific value. The calorific value of the gas is obtained by measuring the furnace temperature change value and then converted and calculated. Its shortcomings It lies in the change value of furnace temperature, which is often affected by the influence of ambient temperature and large lag of temperature change, resulting in low measurement accuracy and sensitivity of the instrument

In order to solve this problem, the usual practice is to set the instrument in a working environment with constant temperature and constant humidity air-conditioning equipment, and take a series of relatively complicated measures to reduce the large hysteresis of furnace temperature changes, but at the same time due to the increase of these equipment It will lead to poor operation stability of this kind of instrument, greatly increase the maintenance workload, and greatly increase the cost of the instrument and the cost of measurement work

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