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Waste heat recovery device of gas-based shaft furnace and gas-based shaft furnace

A technology of waste heat recovery device and gas-based shaft furnace, which is applied in the direction of shaft furnace, furnace, furnace type, etc., can solve the problems of energy waste, the sensible heat of shaft furnace top gas is not effectively used, etc., so as to reduce energy loss and improve Energy efficiency, stress reduction effect

Pending Publication Date: 2017-05-31
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all have the problem that the sensible heat of the top gas of the shaft furnace is not effectively utilized, resulting in energy waste

Method used

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  • Waste heat recovery device of gas-based shaft furnace and gas-based shaft furnace
  • Waste heat recovery device of gas-based shaft furnace and gas-based shaft furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as figure 1 and figure 2 As shown, the gas-based shaft furnace 500 includes a furnace body 510 and a material bin 520, the furnace body 510 is used for the reduction of iron-containing raw materials, and the material bin 520 can add heat source materials for the furnace body 510, for example, the materials can be oxidized pellets, etc. To provide heat for the reduction process of raw materials. It can be understood that, during the reduction process, the generated top gas has a relatively high temperature, and the temperature of the top gas discharged from the exhaust port 511 is about 450°C.

[0060] The waste heat recovery device 100 can recover and utilize the heat of the high-temperature top gas discharged from the gas-based shaft furnace 500, so as to improve energy utilization rate, save energy and protect the environment. Such as figure 1 and figure 2 As shown, the waste heat recovery device 100 includes: a heat exchange chamber 10 , a dust discharge d...

Embodiment 2

[0073] The difference from the first embodiment is that in this embodiment, the high-temperature top gas flows into the heat exchange chamber 10 at a flow rate of 568767Nm3 / h. The gas channels 140 are arranged in 40 rows, and the diameter of the expansion section 141 of the gas channels 140 is 100 mm. The temperature field distribution of each area in the heat exchange chamber 10 is as follows: at the bottom of the heat exchange chamber 10, the temperature in the heat exchange chamber 10 at the small diameter area of ​​the gas channel 140 is about 443°C; in the middle of the heat exchange chamber 10, the temperature in the gas channel The temperature in the heat exchange chamber 10 at the expansion section 141 area of ​​140 is 155°C-448°C; at the upper part of the heat exchange chamber 10, the temperature in the heat exchange chamber 10 at the small diameter area of ​​the gas channel 140 is 30°C-150°C ℃.

[0074] Therefore, by increasing the number of gas passages 140, the he...

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Abstract

The invention discloses a waste heat recovery device of a gas-based shaft furnace and a gas-based shaft furnace. The gas-based shaft furnace comprises a furnace body and a material bin. The waste heat recovery device comprises a heat exchange bin and at least one gas channel, wherein the heat exchange bin is provided with a material inlet, a material outlet, a furnace top gas inlet and a furnace top gas outlet; the material inlet is communicated with the material bin; the material outlet is communicated with the furnace body; the furnace top gas inlet is communicated with an exhaust port of the furnace body; a material-through cavity is formed in the heat exchange bin and is communicated with the material inlet and material outlet respectively; the gas channel is arranged in the material-through cavity; and the two ends of the gas channel are communicated with the furnace top gas inlet and furnace top gas outlet respectively. According to the waste heat recovery device of a gas-based shaft furnace disclosed by the invention, due to the heat exchange bin and the gas channel, high-temperature furnace top gas exhausted from the exhaust port of the furnace body can exchange heat with the material in the material-through cavity to transfer heat to the material and preheat the material entering the furnace body. Thus, the waste heat of the furnace top gas is reutilized, and the effects of energy conservation and environmental protection are realized.

Description

technical field [0001] The invention relates to the technical field of metal smelting, in particular to a waste heat recovery device for a gas-based shaft furnace and the gas-based shaft furnace. Background technique [0002] The gas-based shaft furnace is the main reactor for reducing iron, and it is also a commonly used reactor in the pre-reduction stage of the smelting reduction process. The heat source in the shaft furnace mainly comes from the sensible heat of fresh gas. In order to meet the needs of heating, a large amount of fresh gas must be fed into the shaft furnace. The temperature of the furnace top gas is about 450°C, and about 40% of the energy is taken away by the top gas. The heat loss is relatively large. [0003] In related technologies, the treatment and utilization methods of furnace top gas mainly include: after washing and pressure treatment, it is used as cooling gas for the cooling section of the lower part of the shaft furnace. After the cooling pr...

Claims

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Application Information

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IPC IPC(8): C21B13/02
CPCC21B13/023
Inventor 冯鲁兴韩志彪唐敬坤邓君曹志成汪勤亚吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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