Cracking furnace tube outer wall temperature measurement instrument driving device

Abstract

The present invention discloses a cracking furnace tube outer wall temperature measurement instrument driving device. The cracking furnace tube outer wall temperature measurement instrument driving device comprises a guide rail at the two sides of which grooves are arranged and a temperature measurement driving platform, a rack is arranged on the guide rail, and the temperature measurement driving platform comprises a bottom plate. A plurality of guide wheels embedded in the grooves of the guide rail are arranged below the bottom plate, a horizontal driving motor and a rotary driving motor are arranged on the bottom plate, and the horizontal driving motor is connected with a gear to drive the temperature measurement driving platform to move on the guide rail along the rack. The rotary driving motor is connected with a rotator, and the speed of the horizontal driving motor and the angular velocity of the rotary driving motor satisfy the following relation, wherein omega is the speed of the rotary driving motor, V1 is the speed of the horizontal driving motor, H1 is the distance between a guide rail plane and a cracking furnace tube plane, H2 is the distance between the guide rail plane and a cracking furnace looking-fire-hole, and H3 is the depth of the cracking furnace looking-fire-hole. The cracking furnace tube outer wall temperature measurement instrument driving device of the present invention realizes the biphase motion of a temperature measurement instrument, and enables the temperature measurement instrument to scan all furnace tubes evenly.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a driving device for a pyrometer on the outer wall of a cracking furnace tube. Background technique [0002] The ethylene industry is an important substrate in the petrochemical industry, and the cracking process is one of the key technologies in the ethylene industry. At present, more than 99% of my country's ethylene production uses tube furnace steam pyrolysis technology, and the operating status of the cracking furnace directly affects the yield and quality of ethylene. In the cracking furnace, the furnace tube is the key component, which plays the role of heating the raw material and the reactor. Since the furnace tube of the cracking furnace operates in a high-temperature complex environment for a long time, it is prone to surface oxidation, coking caused by corrosion, local over-temperature, etc., as well as phase change and mechanical performance degradation caused ...

AI Technical Summary

Problems solved by technology

[0005] 1. The fire viewing hole is small, and the range of the furnace that can be clearly observed is relatively limited

[0006] 2. The working environment is harsh: the furnace has large fireworks and high temperature (up to 1200°C), the heat radiation of the fire observation hole is large, the temperature measurement environment is high in temperature, accompanied by vibration and noise, and the temperature measurement environment is harsh

[0007] 3. Difficult positioning of the furnace tubes: the arrangement of the furnace tubes is irregular, the tubes are sometimes dense and sometimes sparse, and there are occasional front and rear occlusions, accompanied by slight shaking, so it is difficult to locate accurately

[0008] 4. It is difficult to distinguish the temperature measurement value: it is very difficult to identify whether the measured temperature is the temperature of the inner wall of the furnace or the outer wall of the furnace tube, and which furnace tube is the temperature of.

[0009] 5. Furnace pyrotechnics greatly disturb the infrared temperature measurement, and it is very difficult to construct a nonlinear compensation model

[0010] 6. After long-term operation and multiple inspections of the cracking furnace, the thickness of the fire viewing hole, the distance from the fire viewing hole to the furnace tube, the shape and size of the fire viewing hole have undergone fundamental changes, and the reproducibility is poor.

The current technology teaches the method of controlling the position and speed of the light spot in the case of linear motion and curved motion, such as the Chinese invention patent document named as the control method of the light spot pose in laser quenching with the application number 2005100282901, which discloses A method to control the pose of the light spot, but it is aimed at the curve movement, and the solution is that the scanned object moves while the probe emitting the light spot does not move, which is not suitable for the drive device of the pyrometer on the outer wall of the cracking furnace tube

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