Continuous air blast type strong wind warm blast furnace

Abstract

The invention discloses a high air temperature hot air furance for continuously supplying hot air, and belongs to the technical field of auxiliary equipment of hot air furnace of an ironmaking blast furance in the iron and steel industry. The hot air furnace comprises a furnace top, a combustion chamber, checker bricks, a connecting pipe and the like. The hot air furnace is characterized in that the checker bricks in the furnace are separated into an upper group and a lower group which are arranged at intervals, one group of checker bricks are used for heat storage, the other group of checker bricks are used for air supply, a combustor is arranged on the furnace top, and after combustion, flue gas passes through the furnace top, the connecting pipe, a ring channel and a nozzle and enters the checker bricks for combustion and heat storage in the mode of small flow; at the same time, cold air enters the other group of checker bricks and is preheated to be high temperature air and subjected to reversing control by a reversing valve; the working conditions in the two groups of checker bricks are opposite, and the cycle is repeated again and again, and the high temperature air is continuously supplied. The hot air furnace has the advantages of realizing the supply of the high temperature air at a temperature of between 1250 and 1600 DEG C by completely burning low-heat value coal gas and meeting the needs of blast furnace ironmaking, along with simple structural design, self pre-heating and continuous hot air supply.

Description

technical field [0001] The invention belongs to the technical field of hot blast stoves for auxiliary equipment of ironmaking blast furnaces in the iron and steel industry, and in particular relates to a high-wind-temperature hot-blast stove for continuous hot blast supply, which can be used under the condition of all low calorific value gas. technical background [0002] The hot blast stove is an important equipment in the ironmaking production process. Its principle is to use the heat storage technology to turn the cold air into the hot air required by the blast furnace. According to the structure of the hot blast stove, it can be divided into various forms such as external combustion type, internal combustion type and top combustion type. [0003] At present, a blast furnace often needs to be equipped with 2 to 4 hot blast stoves. When each hot blast stove is working, the burner is often in a state of burning and stopping circulation. Sometimes, one to two hot blast stov...

AI Technical Summary

Problems solved by technology

[0003] At present, a blast furnace often needs to be equipped with 2 to 4 hot blast stoves. When each hot blast stove is working, the burner is often in a state of burning and stopping circulation. Often, one to two hot blast stoves are often added as air preheating devices for hot blast stoves, or metal heat exchangers are used to preheat air or gas, and the investment cost is very high

Images