Purification and recovery plant realized by means of directly calcining lime by aid of primary high-temperature flue gas of converter

Abstract

The invention provides a purification and recovery plant realized by means of directly calcining lime by the aid of primary high-temperature flue gas of a converter. The purification and recovery plant comprises a first converter and a second converter, the first converter is communicated with the top of a first calcination section shell, the lower end of the first calcination section shell is connected with a first cooling section shell, the second converter is communicated with the top of a second calcination section shell, the lower end of the second calcination section shell is connected with a second cooling section shell, the first cooling section shell is communicated with the second cooling section shell by a vent pipe, and both the first calcination section shell and the second calcination section shell are communicated with a feeding pipe. By the aid of the purification and recovery plant, waste heat of high-temperature flue gas of the converter can be used for calcining thelime, so that waste heat of the primary high-temperature flue gas of the converter is recovered, a water treatment system is omitted, the running cost of equipment is greatly reduced, environmental pollution is avoided, a lime calcination procedure can be carried out continuously, and production efficiency is high.

Description

technical field [0001] The invention relates to a waste heat recovery device of converter flue gas, in particular to a device for purifying and recovering the primary high-temperature flue gas of the converter by directly calcining lime. Background technique [0002] At present, there are two ways to purify and recover the primary flue gas of the converter. One is the wet purification recovery system, which adopts saturated cooling. The high-temperature flue gas passes through the "two papers and one tower", and the temperature is cooled from 800-1000 ℃ at the outlet of the vaporization cooling flue to about 70 ℃, and then enters the primary fan room for recovery Or diffuse; one is the dry purification recovery system, which uses evaporative cooling, high-temperature flue gas passes through evaporative coolers, electrostatic precipitators, and gas coolers, and the temperature is cooled from 800-1000 °C at the outlet of the vaporization cooling flue to about 70 After ℃, the ...

AI Technical Summary

Problems solved by technology

In the above two methods, the heat of the converter flue gas from 800°C to about 70°C is absorbed by water through saturation or evaporative cooling and further directly cooled. Treatment system, equipment operation cost is high, and will cause pollution to the environment

Images