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Molten-state high-temperature matter physical sensible heat recovery system

A technology of sensible heat recovery and molten state, which is applied in the direction of recycling technology, waste heat treatment, heat exchanger type, etc., can solve the problems of low cooling rate, sacrifice of steel slag cement quality, etc.

Inactive Publication Date: 2019-01-04
刘柏谦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This limits some technologies with lower cooling rates (such as wind quenching), otherwise the quality of steel slag cement will be sacrificed

Method used

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  • Molten-state high-temperature matter physical sensible heat recovery system
  • Molten-state high-temperature matter physical sensible heat recovery system
  • Molten-state high-temperature matter physical sensible heat recovery system

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Embodiment

[0028] The flow rate of metallurgical slag is 2×2.3t / min=2×138t / h, and the bulk specific gravity of metallurgical slag is 1.250t / m3, then the volume flow rate of metallurgical slag is 2×138 / 1.25=2×110.4m3 / h. Since metallurgical slag is operated intermittently, the actual flow rate of metallurgical slag in the granulation system is taken as 110.4m3 / h. Metallurgical slag temperature 1550 ℃. According to thermodynamic calculations, steel slag completes the phase transformation of steel slag before 1200°C, that is, transforms from a molten state to a solid glass phase, and at this time it consumes 17% of the heat of phase change equivalent to the heat of steel slag. That is, the heat between 1550°C and 1100°C is consumed in the phase transformation of steel slag and water in the low temperature space.

[0029] The amount of atomized water sprayed is 16-20t / h.

[0030] The cooling water is 50°C industrial return water with a flow rate of 50t / h to produce 2.0MPa 120°C high-tempera...

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Abstract

The invention discloses a molten-state high-temperature matter physical sensible heat recovery system and belongs to the field of engineering thermophysics. Waste heat recovery and recycling of high-temperature metallurgy waste residues generated by iron and steel plants and nonferrous metallurgy plants are achieved. A revolving cup is used for pelleting, slag particles enter a mist space after being tossed away from the revolving cup, and the cooling speed one order of magnitude higher than that of flight in air is obtained. The cooled slag particles enter a powder heat exchanger under actionof gravity, cooling water in the powder heat exchanger absorbs heat and is converted into hot water with pressure, the hot water with pressure enters a flash vessel to be converted into medium-pressure (low-pressure) steam, and the steam drives a steam turbine and a power generator to generate power. The cooled slag particles obtain glass phases by 95% or above, the waste heat recovery rate is close to 83%, while the rest is unrecoverable phase change heat. Steel slag cement quality is ensured while heat is recovered.

Description

technical field [0001] The invention relates to a technology for recovering physical sensible heat of high-temperature molten substances, which can not only ensure the maximum recovery of physical sensible heat of molten substances, but also ensure resource recovery and utilization of molten substances when necessary. It can be used for physical sensible heat recovery of metallurgical slag (converter slag, blast furnace slag, including colored slag such as lead, zinc, copper and tin), molten calcium carbide and other high-temperature molten substances in chemical processes. Background technique [0002] The total energy consumption of China's iron and steel industry accounts for 16.3% of the country's total energy consumption, and the sensible heat of slag (including blast furnace and converter slag) in iron and steel enterprises accounts for 9% of the total energy consumption of enterprises. According to the "Statistical Report on National Economic and Social Development in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F28C3/18F22B1/04C21B3/06C21B3/08
CPCC21B3/06C21B3/08F22B1/04F27D17/004F27D2017/006F28C3/18Y02P10/25Y02W30/50
Inventor 刘柏谦
Owner 刘柏谦
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