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Liquid-state molten slag waste heat recycling system

A technology of waste heat recovery system and liquid slag, which is applied in the direction of recycling technology, can solve the problems of lack of recovery technology, etc., and achieve the effect of improving sufficient heat exchange, ensuring stable operation, and improving the smooth discharge of the system

Active Publication Date: 2020-04-17
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the liquid slag of the above-mentioned high-quality waste heat resources, there is currently a lack of perfect recovery technology, and the potential for waste heat recovery is huge

Method used

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  • Liquid-state molten slag waste heat recycling system
  • Liquid-state molten slag waste heat recycling system
  • Liquid-state molten slag waste heat recycling system

Examples

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Embodiment approach

[0066] a) Open the flue gas outlet gap around the top of the granulation bin, the flue gas flows into the flue gas annular header through the flue gas outlet gap around the granulation bin, and finally set up a collection flue on the flue gas annular header to draw out the flue gas .

[0067] b) Open the flue gas outlet gap around the slag discharge pipe in the center of the granulation bin, the flue gas flows into the flue gas annular header through the flue gas outlet gap in the center of the granulation bin, and finally set up a collection flue on the flue gas annular header to lead out smoke.

[0068] In the connecting section between the moving bed waste heat recovery device and the granulation rotor, a slag cotton scraper is installed. The slag cotton scraper is arranged on both sides of the granulation rotor, arranged at 180°, designed according to the sawtooth structure, and adopts 310S stainless steel for high temperature resistance material. In the early stage of w...

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Abstract

The invention discloses a liquid-state molten slag waste heat recycling system. The system comprises a molten slag temporary storage device, a flow control device, a centrifugal graining device and amoving bed device. One end of the molten slag temporary storage device is connected with a slag trough, the other end of the molten slag temporary storage device is connected with the inlet end of theflow control device, the outlet end of the flow control device is connected with the inlet end of the centrifugal graining device, the outlet end of the centrifugal graining device is connected withthe moving bed device, through the molten slag temporary storage device, influence of blast furnace intermittent deslagging on a centrifugal graining system can be effectively avoided, stable runningof the centrifugal graining system can be ensured, the capacity of accident emergency treatment of the waste heat recycling system can be improved, through the flow control device, the centrifugal graining device and the moving bed device, the slag grain sufficient heat exchange and system discharging smoothness can be effectively improved, and the heat exchange efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of blast furnace slag waste heat recovery, in particular to a liquid slag waste heat recovery system. Background technique [0002] In the metallurgical industry, such as iron and steel smelting, a large amount of high-temperature slag is produced, and the slag temperature of blast furnace slag can reach 1400-1550 ° C; my country's existing iron and steel smelting technology will produce 0.3 tons of blast furnace slag for every ton of pig iron produced. In 2016, my country's pig iron Calculating the output of 700 million tons, it can be equivalent to producing more than 210 million tons of blast furnace slag. For the liquid slag of the above-mentioned high-quality waste heat resources, there is currently a lack of perfect recovery technology, and the potential for waste heat recovery is huge. [0003] Compared with the water quenching method, the dry method not only saves a lot of water resources, but also h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/08C21B3/06
CPCC21B3/06C21B3/08C21B2400/05C21B2400/08Y02W30/50
Inventor 王树众吴志强马琛赵军肖照宇李美全徐宁文
Owner XI AN JIAOTONG UNIV
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