High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace

A combined technology of energy saving and emission reduction, applied in blast furnace details, blast furnace, blast furnace parts and other directions, can solve problems such as large flow resistance on the air side and flue gas side, deformation and burnout of heat exchange tubes, and large total weight of equipment. , to achieve the effect of saving operating energy consumption, small flow resistance, and safe and reliable system operation.

Inactive Publication Date: 2010-12-29
江苏中天能源设备有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] (1) Due to the installation of a turbulent heat exchanger for secondary air preheating in the system, the total weight of the equipment is still too large;
[0004] (2) The flow resistance on the air side and the flue gas side is relatively large;
[0005] (3) The number of valves in the system is too la...

Method used

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  • High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace
  • High-blast-temperature energy-saving and emission-reducing combined type preheating system for blast furnace

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Embodiment Construction

[0022] Such as figure 1 As shown, the air from the cold air main pipe 14 is connected to the air inlet of the air preheating combined heat pipe heat exchanger 20 through the air inlet pipe 12 and the air shutoff valve 18, and the air preheating combined heat pipe heat exchanger 20 The air outlet is connected to the hot air main pipe 4 through the air outlet pipe 22 and the valve 7, and is sent to the air inlet end of the hot blast stove 1. The cold air main pipe 14 and the hot air main pipe 4 are connected by a shut-off valve 15 .

[0023] The cold gas main pipe 13 is connected to the gas inlet port of the gas preheating combined heat pipe heat exchanger 16 through the gas shut-off valve 11 and the gas pipe 17, and the gas outlet of the gas preheating combined heat pipe heat exchanger 16 passes through the hot gas pipe 15 , Valve 8 is connected to hot gas main pipe 6. The cold gas main pipe 13 and the hot gas main pipe 6 are connected by a shut-off valve 10 .

[0024] Hot g...

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Abstract

The invention relates to a high-blast-temperature energy-saving and emission-reducing combined type preheating system for a blast furnace, which belongs to the technical fields of energy saving, emission reduction and iron and steel smelting equipment. The high-blast-temperature energy-saving and emission-reducing combined type preheating system for the blast furnace comprises a cold coal gas inlet pipeline, a cold air inlet pipeline, a hot air furnace, a combustor, a preposed combustion furnace, a preposed furnace blower, an air preheating combined type heat pipe heat exchanger, a coal gas preheating combined type heat pipe heat exchanger, a draught fan and a chimney. The high-blast-temperature energy-saving and emission-reducing combined type preheating system for the blast furnace has the advantages of economic operation, energy saving and wide application to the iron and steel smelting industry.

Description

technical field [0001] The invention belongs to the technical field of energy saving and emission reduction and iron and steel smelting equipment, and in particular relates to a combined preheating system used in an ironmaking blast furnace hot blast stove. Background technique [0002] Among the existing iron and steel production equipment, there is a "blast furnace high air temperature combined heat exchange system" (patent number: ZL200420024014.9), which is mainly composed of a hot blast stove, a front combustion furnace, an air spoiler heat exchanger, and a gas heat pipe for heat exchange. It is composed of heat exchanger, air heat pipe heat exchanger, smoke exhaust fan, pre-furnace blower, cold gas main pipe, cold air main pipe and proper pipelines and valves. When working, multiple hot blast stoves are used to provide hot blast to the blast furnace in turn. Under the same premise, the higher the temperature of the hot blast stove vault, the higher the temperature of ...

Claims

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Application Information

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IPC IPC(8): C21B9/14
Inventor 梁怀奇许永贵
Owner 江苏中天能源设备有限公司
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