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High-temperature low-oxygen top-combustion-type air heating furnace

A high-temperature, low-oxygen combustion, high-temperature, low-oxygen technology, applied to brick blast furnaces, etc., can solve problems such as intergranular stress corrosion of the furnace shell, pollute the environment, and accelerate production, and achieve improved heat transfer efficiency, increased flame volume, and NOX The generation-inhibiting effect of

Active Publication Date: 2011-06-08
BEIJING SHOUGANG INT ENG TECH
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the increase of vault temperature, NO X The formation of the steel will be sharply accelerated, causing a series of problems such as intergranular stress corrosion of the furnace shell and environmental pollution.
Therefore, the existing conventional hot blast stove generally controls the temperature of the vault below 1420°C, thus limiting the further increase of the air temperature

Method used

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Embodiment Construction

[0022] Figure 1 ~ Figure 3 It is a specific embodiment of the present invention. Such as figure 1As shown in the structural diagram of the embodiment of the present invention, the high-temperature low-oxygen top-fired hot blast stove consists of a cold air inlet 1, a furnace grate and a pillar 2, a flue gas outlet 3, a checker brick 4, a regenerator 5, a furnace lining 6, and a furnace shell 7. Hot air outlet 8, combustion chamber 9, high temperature low oxygen burner 10 layers. Wherein the high-temperature low-oxygen burner 10 is composed of the first layer of gas nozzle 11, the first layer of gas ring 12, the first layer of gas inlet 13, the first layer of air nozzle 14, the first layer of air ring 15, the first layer of air inlet 16. The second layer of air nozzles 17, the second layer of air rings 18, the second layer of air inlets 19, the second layer of gas nozzles 20, the second layer of gas rings 21, and the second layer of gas inlets 22.

[0023] Depend on figure...

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Abstract

The invention relates to a high-temperature low-oxygen top-combustion-type air heating furnace belonging to the technical field of air heating furnaces and comprising a cold air inlet, a furnace grate, columns, grid blocks, a regenerative chamber, a furnace liner, a furnace shell, a high-temperature low-oxygen combustor, a combustion chamber, an arc top, a hot air outlet and a flue gas outlet. The high-temperature low-oxygen top-combustion-type air heating furnace is characterized in that the high-temperature low-oxygen combustor is arranged at the upper part of the air heating furnace and comprises two gas inlets, circular tracks, nozzles, two air inlets and hollow gas pre-combustion chambers, each inlet, circular track and nozzle comprise 1-20 layers, combustion-supporting air over 800 DEG C sucks combustion products by fractional combustion and high-temperature airflows in the high-temperature low-oxygen combustor, and the oxygen volume density of a reaction area is diluted to realize high-temperature low-oxygen combustion fully different from a traditional combustion process. The invention is suitable for air heating furnaces used for ironmaking with blast furnaces or by smelting reduction in the ironmaking industry and can also be used in the industrial technical field of heating gaseous media over 1000 DEG C.

Description

technical field [0001] The invention belongs to the technical field of hot blast stoves, and in particular provides a high-temperature, low-oxygen top-combustion hot blast stove, which is suitable for blast furnace ironmaking and smelting reduction ironmaking in the ironmaking industry. It can also be used in other industrial technical fields that need to heat the gaseous medium to above 1000°C. Background technique [0002] It has been nearly 200 years since hot blast stoves were used to heat the blast in the blast furnace ironmaking process, and the blast temperature was only 149°C after the initial heating. With the continuous advancement of technology, the current maximum wind temperature has reached 1300 ℃. Increasing the air temperature can greatly reduce the coke ratio, save coke, increase the output of the blast furnace, and make full use of the blast furnace gas with low calorific value, improve energy utilization efficiency, reduce gas emission, save energy, and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B9/04
Inventor 张福明程树森胡祖瑞李欣毛庆武钱世崇梅丛华倪苹银光宇
Owner BEIJING SHOUGANG INT ENG TECH
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