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Iron bath method high temperature gas waste heat and waste energy utilization and dry method dedusting technology

A dry dust removal and coal gas technology, which is applied in the direction of improving energy efficiency, process efficiency, waste heat treatment, etc., can solve the problems of difficult recovery and utilization of physical heat and chemical energy of coal gas, and achieve high-efficiency conversion and direct utilization, energy recovery High efficiency and good dust removal effect

Active Publication Date: 2013-12-25
BEIJING SHOUGANG INT ENG TECH
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AI Technical Summary

Problems solved by technology

It solves the problem that it is difficult to recover and utilize the physical heat and chemical energy of the high temperature and low calorific value gas of the iron bath furnace

Method used

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  • Iron bath method high temperature gas waste heat and waste energy utilization and dry method dedusting technology

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Embodiment 1

[0020] Such as figure 1 As shown, a new technology of high-efficiency utilization of waste heat and waste energy of high-temperature gas smelting reduction by iron bath method and dry dust removal technology, including water-cooled fume hood, cyclone dust collector, air-gas heat exchanger, bag filter, regulating valve, gas boiler, Hot blast stove, chimney, etc., the process steps include high-temperature gas at 1450°C and pressure of 0.08MPa from the iron bath furnace, with a flow rate of 2.2X10 5 N m 3 / h, first cooling down to 900°C through a water-cooled fume hood, and then entering the cyclone dust collector for coarse dust removal, the dust content of the gas is reduced from 70g / Nm 3 down to 12g / Nm 3 , and then through the air-gas heat exchanger to reduce the temperature of the gas to 180 °C, and at the same time heat the air to 400 °C, the cooled gas enters the bag filter for secondary dust removal, and the filtering wind speed (standard condition) is 0.8 m / min. Redu...

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Abstract

The invention provides an iron bath method high temperature gas waste heat and waste energy utilization and a dry method dedusting technology, and belongs to the field of high temperature gas recovery processing technology. The invention comprises the following steps: cooling gas from an iron bath furnace by a water cooling smoke cover; carrying out coarse dedusting by a cyclone dust collector; cooling by a gas-gas heat exchanger; carrying out secondary dedusting of cooled gas by a cloth bag deduster; mixing one part of purified gas and high heating value gas, and combusting the mixed gas from a gas branch pipe by a combustion gas boiler for generating; using the other part of purified gas from the gas branch pipe as fuel in a hot-blast stove for producing hot blast from the iron bath furnace; discharging flue gases from the hot-blast stove and the combustion gas boiler. The invention has the advantages of high efficiency recovery of waste heat and waste energy with high temperature and net heat value, high efficiency of energy recovery and good effect of dedusting.

Description

technical field [0001] The invention belongs to the technical field of high-temperature gas recovery and treatment, and in particular relates to an iron-bath high-temperature gas waste heat and waste energy utilization and dry dust removal process. Especially for the high-efficiency recovery of waste heat and waste energy of iron bath smelting reduction high-temperature gas and dry dust removal. Background technique [0002] Iron bath smelting reduction is a smelting reduction ironmaking process that directly uses ore powder and non-coking coal powder for smelting without coke and agglomeration. By spraying fine ore and coal powder into the metal molten pool, the carbon is melted into the molten pool to reduce the ore powder, and at the same time, the volatile matter in the coal and the carbon monoxide produced by reduction are different from the oxygen brought in by the hot air spray gun in the upper part of the melting furnace. The complete combustion reaction releases a ...

Claims

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Application Information

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IPC IPC(8): C21B13/00F27D17/00
CPCY02P10/25
Inventor 曹朝真张福明毛庆武姚轼章启夫侯建徐辉梅从华李欣李勇孟祥龙李林
Owner BEIJING SHOUGANG INT ENG TECH
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