Converter gas dry method bag-type recovering and purifying process system

Abstract

The invention relates to a converter gas dry method bag-type recovering and purifying process system. A waste heat boiler is connected with a water-cooling flue; the two ends of a primary waste heat boiler are connected with the water-cooling flue and an atomizing cooler respectively; the atomizing cooler is connected to a secondary waste heat boiler through a cinder cooler; the inlet of the secondary waste heat boiler is connected with a gas mixer through a heating valve bank; the secondary waste heat boiler is connected with a by-pass blower and the gas mixer respectively by a three way valve; the gas mixer is connected to a plurality of dry method bag-type dust removers; the dry method bag-type dust removers are connected with a gas blower; the gas blower is connected to a clean gas cooler; the clean gas cooler is connected to a gaspipe network; the clean gas cooler and the gas mixer are connected by a pipeline and the heating valve bank; a low speed valve bank is arranged between the inlet and the outlet of the gas blower; the bottom of the cinder cooler and the bottom of each dry method bag-type dust remover are connected with totally-enclosed cinder conveyers respectively; and the totally-enclosed cinder conveyers are connected with a cinder storage bin. The converter gas dry method bag-type recovering and purifying process system of the invention is capable of controlling the dust concentration of gas under 5mg / Nm3.

Description

technical field [0001] The invention is a converter gas full-dry bag recovery and purification process system for fully recovering the heat energy in the high-temperature gas produced during converter smelting, and adopting a full-dry bag-type dedusting method for the gas. Background technique [0002] The converter produces a large amount of flue gas containing carbon monoxide during the smelting process, commonly known as "converter raw gas", with a temperature as high as 1450°C and a large amount of heat energy. At the same time, the gas contains a large amount of dust, and the dust content is as high as 100~120 g / Nm 3 The main components of dust are iron and iron oxides. In order to recover the heat energy and dust in the gas, and to purify and utilize the gas, and to ensure the normal operation of subsequent equipment, the raw gas must be dedusted before it can be used. At present, converter gas is mainly recovered and purified by wet method (OG method) and semi-dry met...

AI Technical Summary

Problems solved by technology

The recovery and purification process system completely solves the consumption and secondary pollution problems of the recovery and purification process water by the wet method (OG method), and at the same time overcomes the flash explosion phenomenon caused by the electric dust removal discharge of the (LT method); it ensures the converter and subsequent equipment Under the premise of stable operation, the heat energy in the converter gas is recovered throughout the process, thereby realizing low or no energy consumption for converter steelmaking

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