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A liquid slag granulation and waste heat recovery device

A waste heat recovery device, a technology of liquid slag, applied in metal processing, waste gas treatment, climate sustainability, etc., can solve the problems of high-quality waste heat resource recycling, large water consumption, low glass body conversion rate, etc., to improve energy Utilization rate, efficient recovery, and the effect of improving energy utilization

Active Publication Date: 2019-12-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although vitreous slag particles can be used in the cement industry for resource utilization, the water quenching method has the following disadvantages: high water consumption, 0.8 to 1.2 tons of fresh water is needed to prepare 1 ton of slag particles, and the circulating water consumption is about 10 tons; During water quenching, SO 2 and H 2 S and other acidic gases cause environmental pollution; this process does not recycle high-quality waste heat resources contained in blast furnace slag
The use of traditional moving bed heat exchange equipment is prone to problems such as slag particle reheating, remelting, low waste heat recovery efficiency, uneven bed distribution, and low glass conversion rate.

Method used

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  • A liquid slag granulation and waste heat recovery device
  • A liquid slag granulation and waste heat recovery device
  • A liquid slag granulation and waste heat recovery device

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Embodiment Construction

[0030] see Figure 1 to Figure 3 As shown, a liquid slag granulation and waste heat recovery device of the present invention includes: a granulation bin 205 and a moving bed 326 .

[0031] The granulation bin 205 is square or round, and its upper part is a flat top or a dome with an angle of more than 30° with the horizontal; the center of the top of the granulation bin 205 is provided with an opening for the slag discharge pipe 201 to extend into, and the slag discharge pipe 201 is arranged externally A hot air outlet 237 is provided; a granulator 219 is arranged directly below the slag falling pipe 201 to play the role of granulating molten slag. Several stave pipes 206 are uniformly arranged on the inner wall of the granulation bin 205, and the lower part of the granulation bin 205 is provided with a granulation bin inlet header 208 which communicates with the several stave pipes 206 and provides cooling medium for the several stave pipes 206.

[0032] The moving bed 326 i...

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Abstract

A liquid slag granulation and waste heat recovery apparatus, comprising a granulation chamber (205) and a moving bed (326). The inner wall of the granulation chamber (205) is uniformly provided with several cooling wall tubes (206), and the lower part of the granulation chamber is directly connected to the moving bed (326); the upper part of a slag granule material layer is provided with a dilute-phase zone buried tube (303), the surface of the material layer is provided with flat-push scrapers (302), and the bottom is provided with an air distribution means; dense-phase zone buried tubes (308) are provided between the air distribution means and the scrapers (302). Latent heat of slag granules is efficiently recovered, thereby ensuring stable operation of the granulation chamber (205) and the moving bed (326).

Description

technical field [0001] The invention belongs to the technical field of slag granulation and waste heat recovery, in particular to a liquid slag granulation and waste heat recovery device. Background technique [0002] Blast furnace slag is a solid waste produced in the iron and steel smelting process, and its main components include calcium oxide, magnesium oxide, aluminum oxide, manganese oxide, etc. The slag discharge temperature of blast furnace slag is 1400-1550℃, and the heat energy carried by each ton of blast furnace slag is about 1770MJ, which is equivalent to 60kg of standard coal, which has great potential for heat recovery. In 2015, China's pig iron output was 691 million tons, and the output of blast furnace slag was about 213 million tons. According to the calculation of 1770MJ carried by each ton of blast furnace slag, the sensible heat generated by these blast furnace slags was about 3.77×10 8 GJ, equivalent to 12.78 million tons of standard coal. Therefore,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/06C21B3/08
CPCC21B3/06C21B3/08C21B2100/66C21B2400/026C21B2400/034C21B2400/08
Inventor 王树众曾荣华赵军张茜马立伟吴志强孟海鱼
Owner XI AN JIAOTONG UNIV