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Liquid slag dry granulating and waste heat recovery device with slag wool crushing function and operation method of device

A waste heat recovery device and technology of liquid slag, applied in the direction of recycling technology, can solve problems such as the harm of granulation system, and achieve the effect of improving waste heat recovery rate, enhancing heat exchange, and enhancing waste heat recovery effect.

Active Publication Date: 2020-04-17
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] The object of the present invention is to provide a liquid slag dry granulation and waste heat recovery device and its operation method with slag wool crushing function to solve the problem of slag wool formed in the current liquid slag dry granulation process to the granulation system. Hazardous technical issues

Method used

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  • Liquid slag dry granulating and waste heat recovery device with slag wool crushing function and operation method of device

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Embodiment approach

[0058] 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 .

[0059] 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.

[0060]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 wa...

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Abstract

The invention discloses a liquid slag dry granulating and waste heat recovery device with a slag wool crushing function and an operation method of the device. The device comprises a granulating bin, agranulating system, a slag wool crushing device and a moving bed. A temperature measuring device and a slag falling pipe are arranged on the top wall of the granulating bin. The granulating system isarranged in the granulating bin and comprises a rotating cup, the rotating cup is located under the slag falling pipe, and a partition wall is arranged on the lower portion of the rotating cup. A shear crusher doing reciprocating motion is arranged on the partition wall. The position of the moving bed is lower than the position of the shear crusher. The moving bed comprises a rake and a crusher.The rake and the crusher are arranged in the granulating bin, the rake can do reciprocating motion, and the position of the crusher is lower than the position of the rake. A bulk material accumulationportion is arranged at the bottom of the granulating bin. A cooling air pipeline is arranged at the bottom of the granulating bin. According to the liquid slag dry granulating and waste heat recoverydevice, slag wool generated in the granulating process can be crushed efficiently, accidents can be reduced, and the waste heat recovery rate can be improved.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery of high-temperature liquid slag, and in particular relates to a liquid slag dry granulation and waste heat recovery device with slag cotton crushing function and an operation method thereof. Background technique [0002] In 2018, China's pig iron production was about 771 million tons, accounting for about 60% of the world's total output. In the process of smelting pig iron, blast furnace slag containing huge heat will be produced. The temperature of blast furnace slag is generally between 1400 ° C and 1550 ° C, and each ton of slag contains (1260 ~ 1880) × 103 kJ sensible heat, which is equivalent to 60 kg of standard coal. Under the existing ironmaking technology, 0.3 tons of blast furnace slag is produced for every ton of pig iron produced. Based on the current pig iron production of 771 million tons, it can be converted into more than 231 million tons of blast furnace slag, and its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/06C21B3/08
CPCC21B3/06C21B3/08C21B2400/05C21B2400/08Y02W30/50
Inventor 王树众赵军徐宁文吴志强肖照宇李美全马琛
Owner XI AN JIAOTONG UNIV
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