Tuyere raceway sampling and measuring device

Abstract

The invention discloses a tuyere raceway sampling and measuring device, which comprises a sampling rod, a central pipe, cooling pipes, a thermocouple protection pipe, a thermocouple and compensation lead, a gas sampling pipe, a nitrogen protection pipe, a protective cover, and a tuyere connecting pipe. The sampling rod is formed through connection of the central pipe and the cooling pipes surrounding the central pipe, and high pressure water is introduced into the cooling pipes. The sample rod front end is formed by folding back the cooling pipes on the left and right side. The inside of the central pipe is provided with the gas sampling pipe and the nitrogen protection pipe, and nitrogen is introduced for protection and cooling. The front end of the nitrogen protection pipe is connected to the thermocouple protection pipe, and the thermocouple is inserted to the front end of the thermocouple protection pipe. The gas sampling pipe is inserted into the central pipe horizontally and then folded back, and a gas sampling port is opened on the retreating side. The sampling rod has high strength, small deflection, and an external diameter controlled within 50mm. During sampling, a blastfurnace needs no pressure reduction, oxygen supply stop and coal supply stop, and the device provided in the invention can be inserted into the tuyere raceway for temperature measurement, gas sampling, as well as tuyere raceway length measurement simultaneously.

Description

technical field [0001] The invention relates to a device for on-line sampling and measurement of a tuyere swivel area during normal production of a blast furnace, which can be applied to high-temperature and high-pressure on-site measurement and sampling in various industries and fields. Background technique [0002] High output, low consumption, stability, and long life of blast furnaces are the goals that iron-making producers are constantly pursuing. Improving the quality of coke and ensuring a high combustion rate of pulverized coal in the tuyere swivel area are the objective requirements and necessary conditions for realizing these goals. For this reason, countries all over the world pay great attention to the research work of the tuyere gyration zone in the blast furnace basic technology research, new process development and coal injection technology research. Among them, the German Thyssen company Schwergen blast furnace adopts the sampling method of the tuyere swirl ...

AI Technical Summary

Problems solved by technology

In 2004, when Shougang conducted temperature measurement and sampling tests in the tuyere swivel area of ​​the new No. 3 blast furnace, due to the large volume of the blast furnace, high wind pressure, and the heavy sampling equipment, it could only be carried out after the blast furnace was changed to normal pressure, coal and oxygen were stopped. , because the working condition of the tuyere circulatory area has changed at this time, the measured data is not representative

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