Plug-in flue gas flow measurement method and measurement device based on detection of oxygen content

Abstract

The invention relates to the field of flue gas emission of industrial furnaces, in particular to an insertion type flue gas flow measuring method and device in an excessive air burning environment. According to the insertion type flue gas flow measuring method based on detection of an oxygen content, contents of all components and the flow of a fuel are input from an input end of a data processing device; the theoretical air ratio, the theoretical flue gas, the theoretical air amount and the theoretical flue gas amount of the fuel are obtained through calculation; the oxygen content in the flue gas is obtained through detection of a measurement probe of an oxygen content detection device; and finally, the actual flue gas flow is calculated. The insertion type flue gas flow measuring device based on the detection of the oxygen content comprises the data processing device and the oxygen content detection device, wherein the measurement probe in the oxygen content detection device stretches into a flue gas emission pipe. According to the method and the device, the flue gas flow is calculated according to the components, the flow of the fuel and the oxygen content in the flue gas, and installation and arrangement are facilitated; and the convenient and feasible measuring device and measuring method are provided for measuring the flow of flue gas in a conventional flue gas emission pipe without flow detection.

Description

technical field [0001] The invention relates to the field of flue gas emission from industrial furnaces, in particular to a plug-in flue gas flow measurement method and device in an excess air combustion environment. Background technique [0002] The recovery and utilization rate of waste heat from various furnaces in my country's iron and steel industry is only about 30%, which is far below the level of developed countries. With the increasing emphasis on energy conservation, emission reduction and environmental protection, the recovery of low-grade waste heat / waste heat resources should be strengthened Utilization will be one of the main directions for the future development of my country's iron and steel enterprises. In flue gas waste heat recovery, the waste heat of flue gas must first be evaluated, which involves the measurement of flue gas temperature and flow. The waste heat can be calculated through flue gas flow, flue gas temperature and flue gas physical properties,...

AI Technical Summary

Problems solved by technology

This device is an insertion flowmeter, which overcomes many problems of non-insertion flowmeters. However, when the temperature of high-temperature flue gas fluctuates, the stress and elastic coefficient of the detection rod will change drastically, resulting in inaccurate measurement.

Images