Double-phase driving synchronization method of cracking furnace tube outer wall temperature measurer

Abstract

The invention discloses a double-phase driving synchronization method of a cracking furnace tube outer wall temperature measurer, which comprises the steps of starting the temperature measurer; waiting for the measuring signal; driving a temperature measurement driving bench by a horizontal driving motor, and the temperature measurement driving bench drives the temperature measurer to move on a guide rail along the direction of a fire-observing hole of the cracking furnace until reaching to the initial position of the fire-observing hole, and then driving a revolver by the rotation driving motor, and the revolver drives the temperature measurer to rotate until reaching to the initial angle. The method also comprises the step that the horizontal driving motor cooperates with the rotation driving motor, and the temperature measurer can revolve while moving along the guide rail, and the light spot emitted by the temperature measurer can be scanned to the outer wall of each furnace tube corresponding to the fire-observing hole. The scanning of the furnace tube corresponding to the fire-observing hole is completed, and the horizontal driving motor and the rotation driving motor stop running, and the measuring of the next fire-observing hole can be prepared. The double-phase driving synchronization method of a cracking furnace tube outer wall temperature measurer is advantageous in that the horizontal driving motor drives the temperature measurement driving bench, and the revolver is driven by the rotation driving motor, and the double-phase movement of the temperature measurer can be realized.

Description

Technical field [0001] The invention relates to the field of petrochemical industry, and in particular to a two-phase drive synchronization method for a thermometer on the outer wall of a cracking furnace tube. Background technique [0002] The ethylene industry is an important substrate of the petrochemical industry, and the cracking process is one of the key technologies in the ethylene industry. At present, more than 99% of ethylene production in my country adopts tube furnace steam thermal cracking technology, and the operating conditions of the cracking furnace directly affect the ethylene yield and quality. In the cracking furnace, the furnace tube is one of the key components, which plays the role of heating the raw materials and the reactor. Due to the long-term operation of the cracking furnace tube in a high temperature and complex environment, it is prone to surface oxidation, coking caused by corrosion, local over-temperature, and phase change caused by high temperat...

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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