Method for measuring temperature based on seamless steel tube composite optical fiber on outer wall of coal gasifier

Abstract

The present invention relates to a temperature measuring device based on seamless steel tube composite optical fiber on an outer wall of a coal gasifier and a surface distribution method for high-efficiency temperature measurement. The temperature measuring device comprises temperature measuring optical fiber (1), a seamless steel tube (2), a stainless steel sleeve (3), a first hole (4), a secondhole (5), a fixing device (6), etc. Through the special distribution method applied on the surface of the coal gasifier, the optical fiber in a certain area can be the longest; more temperature pointscan be measured and accurate temperature values can be obtained; temperature jump points can be correctly positioned in the area; thereby the invention provides an optical fiber distribution method for exploring whether the temperature measuring optical fiber can realize the temperature monitoring of the coal gasifier outer wall and creates conditions for researchers to explore the method for monitoring the temperature change of the coal gasifier outer wall in real time.

Description

technical field [0001] The invention relates to the field of high-temperature optical fiber temperature measurement, in particular to an optical fiber device for efficiently and accurately measuring the temperature of each measurement point on the outer wall of a coal gasification furnace and a distribution method thereof. Background technique [0002] When the coal gasification furnace is working normally, the temperature of the furnace wall reaches about 200°C. However, the refractory bricks lining the combustion chamber will be eroded at high temperatures, and the heated gas and slag will be washed away, making the refractory bricks continue to become thinner, and even in some cases Next, due to the defects of bricklaying, the refractory bricks will fall off, making the surface temperature of the gasifier wall rise to 300°C or even higher. The traditional measurement methods mainly include traditional surface thermocouples, gasifier surface cable temperature measurement a...

AI Technical Summary

Problems solved by technology

The high-temperature optical fibers on the market are mainly seamless steel pipe composite optical fibers, which can be used in high-temperature and harsh environments. The defect of this optical fiber is that the flexibility of the optical fiber is sacrificed due to the protection of the steel pipe jacket, and the refractory bricks are thinned or shed. The situation is random, and the measurement effect of the traditional linear distributed temperature measurement optical fiber is not obvious. How to distribute the optical fiber to correctly and quickly determine the location of the abnormal situation can allow the staff to repair and maintain the coal gasifier in the later stage and save money. a lot of time

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