Device for using sensible heat of blast furnace slag with high efficiency

A high-efficiency technology for blast furnace slag, which is applied in the direction of steam engine installations, energy efficiency improvement, recycling technology, etc., can solve the problems of unusable blast furnace slag sensible heat, pollution, etc., and achieve uniform diameter, good granulation effect, and good heat transfer effect Effect

Inactive Publication Date: 2015-02-11
JIANGSU YITONG ENVIRONMENTAL PROTECTION ENG TECH
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above shortcomings, provide a device for efficiently utilizing the sensible heat of blast furnace slag, solve the problem that the sensible heat of blast furnace slag cannot be utilized, and solve various pollution problems existing in the existing water quenching method

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  • Device for using sensible heat of blast furnace slag with high efficiency

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Embodiment Construction

[0020] see figure 1 , the present invention relates to a device for efficiently utilizing the sensible heat of blast furnace slag, comprising a blast furnace 1, a circulating fluidized bed 3 and a steam turbine 5, and a sealed launder is arranged at the outlet of the blast furnace 1 and the inlet of the circulating fluidized bed 3 2. The upper part of the circulating fluidized bed 3 is connected with the steam turbine 5, and the circulating fluidized bed 3 is provided with a secondary air outlet 6 and a feed inlet 7.

[0021] A blast furnace is 3200m 3 , an average of about 100t of hot molten slag is produced per hour, and the slag is discharged once every 2.5 hours. The duration of the slag discharge is 2 hours, and the interruption is 0.5 hours. After adopting the present invention, 90% of the sensible heat of hot molten slag is converted into superheated steam. When the slag discharge is interrupted, it is supplemented with steel plant blast furnace gas, and the circulatin...

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Abstract

The invention relates to a device for using sensible heat of blast furnace slag with high efficiency, which is characterized by comprising a blast furnace (1), a circulating fluidized bed (3) and a steam turbine (5). A sealing launder (2) is provided at the outlet of the blast furnace (1) and the inlet of the circulating fluidized bed (3), the upper part of the circulating fluidized bed (3) is connected to the steam turbine (5), and a secondary tuyere (6) and a feeding port (7) are arranged on the circulating fluidized bed (3). The device for using sensible heat of blast furnace slag ensures the resource utilization of the blast furnace slag, the sensible heat of hot molten slag can be used in a possible mode, and the device for using sensible heat of blast furnace slag acquire good economic and environmental benefits.

Description

technical field [0001] The invention relates to a device for utilizing sensible heat of blast furnace slag. It belongs to the field of waste heat utilization. Background technique [0002] At present, in the process of blast furnace production in iron and steel enterprises, about 300kg of liquid blast furnace slag is produced for every ton of pig iron smelted. The temperature of these hot molten slags is about 1400~1600℃, and each ton of hot molten slag contains about 1700MJ of sensible heat, which is equivalent to Calorific value of 58kg standard coal. 3200m with 1 set 3 Taking the blast furnace as an example, about 100t of hot slag is produced per hour, equivalent to the calorific value of 5.8t of standard coal, enough to produce 40t / h of high-grade steam. Since the 1980s, some developed countries in the world, such as Japan, the United States, the United Kingdom, and Germany, have actively developed hot slag sensible heat resources from the perspective of energy conser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/06C21B3/08F01K11/02F01D15/10F27D17/00
CPCC21B2400/026C21B2400/076C21B2400/08Y02P10/25Y02W30/50
Inventor 赵海浩华玉龙
Owner JIANGSU YITONG ENVIRONMENTAL PROTECTION ENG TECH
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