Infrared Radiation Temperature Measurement Method for Ironmaking Hot Blast Stove Vault

Abstract

The invention relates to an infrared radiation temperature measurement method for measuring the temperature of a vault of an iron making hot blast stove, which includes the following steps: (1) determining the parameters of an infrared radiation thermometer according to the characteristics of the temperature measurement target of the vault of the hot blast stove; (2) collecting a temperature measurement target to make a sample; (3) testing the infrared emissivity or gradient value of the sample of the temperature measurement target through a conventional test method; (4)confirming the measured target is a gray body or is a non-gray body; (5) analyzing the interference factors of an optical path; (6) confirming that the optical path is influenced by week interference or strong interference; (7) observing whether a temperature measurement channel of the vault of the hot blast stove is curved, narrow or blocked; (8) confirming whether surrounding temperature influence exists or not; and (9) determining an integration scheme for the infrared radiation temperature measurement system of the vault of the hot blast stove. With the method, the target of continuously, accurately and reliably measuring the temperature of the vault of the hot blast stove is achieved through quantitative analysis and evaluation on the radiation temperature measurement target of the vault of the hot blast stove and by an approach of optimizing the system integration.

Description

technical field [0001] The invention relates to the technical field of instrument measurement, in particular to an infrared radiation temperature measurement method for a vault of an ironmaking hot blast stove. Background technique [0002] The temperature measurement of the vault of iron-making hot blast stoves traditionally uses platinum-rhodium-platinum (S) or platinum-rhodium-platinum-rhodium (B) noble metal temperature measuring thermocouples, and the measurement range is 0 to 1600 °C. Due to the frequent changes of pressure and temperature in the furnace during the production process of the hot blast stove, the thermal shock is large, and the normal service life of the thermocouple is only about 3 months, resulting in high consumption of spare parts and costs for maintenance, and the labor intensity of maintenance personnel. high risk. In recent years, some domestic metallurgical enterprises have gradually adopted non-contact infrared radiation temperature measurement...

AI Technical Summary

Problems solved by technology

In this method, the measured emissivity value is inaccurate, and a complete set of data on emissivity changes within the actual temperature range cannot be obtained, and it is impossible to quantitatively evaluate the degree of emissivity influence and take countermeasures

If the emissivity parameter of the thermometer is "fixed" at a certain value, it is bound to produce a measurement error of more than ±2% FS

[0004] 2. Interference effects

The problem is that there is no quantitative analysis and evaluation of the various factors that cause interference, and a targeted optimization and integration scheme is adopted to systematically solve the problem based on its mechanism of action.

The influence of interference factors in the optical path on the measurement accuracy is dynamic, and the uncertainty is also large

[0005] 3. Ambient temperature influence

If the infrared thermometer does not take effective heat preservation technology methods and measures, it will bring a lot of additional errors in the ambient temperature

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