Supplement and measuring and calculating method of blast furnace hearth temperature sensor

Abstract

The invention discloses a supplement and measuring and calculating method of a blast furnace hearth temperature sensor, and belongs to the technical field of metallurgical industry model measuring andcalculating. According to the technical scheme, the method comprises the following steps of when the blast furnace hearth temperature sensor is damaged and cannot work normally, installing a supplement temperature sensor around an outer side of a position where the damaged temperature sensor is located; considering safety, controlling an insertion depth according to a set threshold value; calculating an original position temperature according to parameters such as materials, the positions, heat flux density, life cycle correction coefficients and the like; and by combining data of the temperature sensor in a normal state, realizing functions of automatically monitoring the blast furnace hearth temperature and alarming. Problems of different depths, a large data difference, difficulty in effectively monitoring a working state of a hearth and a long service life of the original temperature sensor and the supplement temperature sensor are solved. The technical scheme disclosed in the invention has advantages that an implementation method is simple and convenient, implementation cost is low, and a measuring and calculating result is reliable.

Description

technical field [0001] The invention relates to a supplementary and measuring method for a hearth temperature sensor of a blast furnace, and belongs to the technical field of model measuring and calculating in the metallurgical industry. Background technique [0002] Blast furnace hearth temperature is the most important furnace condition index for blast furnace ironmaking, which directly affects stability and longevity. Since the furnace hearth is a dangerous environment with high temperature and high pressure, the state of the furnace hearth is generally monitored by peripheral thermocouple temperature measurement and other methods. However, once the furnace condition is abnormal, it is very easy to cause damage to the sensor, and the installation of the original thermocouple is permanent. Considering safety, it cannot be pulled out and replaced at will, so the state of the hearth becomes a black box. Patent CN106868242A uses detection data such as furnace shell temperatu...

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Problems solved by technology

However, once the furnace condition is abnormal, it is very easy to cause damage to the sensor, and the installation of the original thermocouple is permanent. Considering safety, it cannot be pulled out and replaced at will, so the state of the hearth becomes a black box

Patent CN106868242A uses detection data such as furnace shell temperature measurement, and through fine calculation of temperature field, realizes the online monitoring and alarm function of hearth erosion based on furnace shell temperature measurement, but it is only applicable to the environment with relatively complete hearth temperature sensors, and the calculation is complicated , the actual situation and automation conditions are often unsatisfactory, which affects the calculation results. At the same time, the supplementary treatment measures after the temperature sensor is damaged are not considered, and the problems caused by the different depths of the original and supplementary temperature sensors are not considered.

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