Waste heat recovery system for cracking furnace

Abstract

The invention discloses a waste heat recovery system for a cracking furnace. The system comprises a liquid metal first circulation path and a liquid metal second circulation path, wherein the liquid metal first circulation path and the liquid metal second circulation path are located inside a furnace body; the first circulation path comprises a closed hollow partition plate, the hollow partition plate communicates with a liquid metal first inlet and a liquid metal first outlet, and a vertical through hole is formed in the hollow partition plate; the second circulation path comprises a sprayingdevice and a spiral flow guide plate which is fixed through a bearing support, the spraying device communicates with a liquid metal second inlet, and spray heads are arranged on the spraying device;liquid metal sprayed by the spraying device is guided by the spiral flow guide plate and then flows out from a liquid metal second outlet; and cooled cracked gas is discharged from a cracked gas outlet. According to the system, the latest design is adopted, the heat exchange efficiency is high, the heat utilization is more sufficient, and the waste heat is utilized to the greater extent to bring the benefits to enterprises.

Description

technical field [0001] The invention relates to the field of waste heat recovery, in particular to a cracking furnace waste heat recovery system. Background technique [0002] At present, in the face of the tense situation of the world's energy forms, domestic and foreign countries have been researching alternative new energy sources, and at the same time, heat recovery and utilization are also carried out in the process of energy conservation and emission reduction. [0003] In the section of the pyrolysis furnace from the radiation chamber where the cracking reaction occurs to the quench chamber, the gas temperature drops from above 800°C to about 400-550°C. How to recover the lost heat during this period has always been a difficult problem in the industry. Due to the complex internal structure of the furnace, If a traditional heat exchanger is installed inside, it will lead to various problems such as high cost, poor performance, cumbersome process, and high failure rate....

AI Technical Summary

Problems solved by technology

[0003] In the section from the radiation chamber where the cracking reaction occurs to the quenching chamber in the cracking furnace, the gas temperature drops from above 800°C to about 400-550°C. How to recover the lost heat during this period has always been a difficult problem in the industry. Due to the complex internal structure of the furnace, If a traditional heat exchanger is installed inside, it will lead to various problems such as high cost, poor performance, cumbersome process, and high failure rate

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