A two-phase drive synchronization method for the temperature measuring instrument on the outer wall of the cracking furnace tube

Abstract

The invention discloses a dual-phase drive synchronization method for a pyrometer on the outer wall of a pyrolysis furnace tube, which includes turning on the pyrometer; waiting for a measurement signal; driving a temperature-measuring drive platform with a horizontal drive motor, and the temperature-measuring drive platform carries the pyrometer along the pyrolysis The direction of the furnace fire viewing hole moves on the guide rail until it reaches the set initial position of the fire viewing hole, and then rotates the drive motor to drive the rotator, and the rotator drives the thermometer to rotate until it reaches the set initial angle; the horizontal drive motor and The rotation drive motor cooperates to make the thermometer rotate along the guide rail at the same time, so that the light spot emitted by the thermometer scans to the outer wall of each furnace tube corresponding to the fire viewing hole; the furnace tube corresponding to the fire viewing hole has been scanned , the horizontal drive motor and the rotary drive motor stop running, and return to prepare for the measurement of the next firehole. The invention realizes the two-phase motion of the temperature measuring instrument by driving the rotator through the rotating driving motor while driving the temperature measuring driving platform by the horizontal driving motor.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a two-phase drive synchronization method for a temperature measuring instrument 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...

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.

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