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Waste heat utilization system for using waste heat of sintering flue gas by the aid of single-pressure double-channel waste heat boiler

A technology of waste heat boiler and sintering flue gas, which is applied in the direction of steam generation method using heat carrier, waste heat treatment, furnace, etc., to achieve the effect of simple and reliable system, short transformation period and reduced wear

Inactive Publication Date: 2014-12-24
湖南永清环境科技产业集团有限公司
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the utilization of waste heat from sintering flue gas in the domestic iron and steel industry has not been widely implemented, and the only cases only stay in the use of high-temperature flue gas at the tail of the sintering machine to produce low-grade working fluid for heating

Method used

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  • Waste heat utilization system for using waste heat of sintering flue gas by the aid of single-pressure double-channel waste heat boiler

Examples

Experimental program
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Embodiment Construction

[0022] like figure 1 As shown, a single-pressure dual-channel waste heat boiler utilizes waste heat from sintering flue gas waste heat utilization system, including sintering machine 1, bellows 2 and 17 at the tail of sintering machine 1, single-pressure dual-channel waste heat boiler 11, and the sintering end point of sintering machine 1 The wind box 2 where the rear end is located is a high-temperature flue gas wind box and the remaining wind box 17 at the tail of the sintering machine 1 is a low-temperature flue gas wind box. Section inlet 18, low-temperature section inlet 19 and flue gas outlet 20, the system also includes 2 main dust-falling pipes 3,4, and in the first main dust-falling pipe 3 of the 2 main dust-falling pipes 3,4 along the main dust-falling pipe 3 Two spacers 5 and 6 are arranged in the axial direction of the pipe to separate the main dust-falling pipe into a high-temperature flue gas area 21, a low-temperature flue gas area 22 and a flue gas confluen...

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Abstract

The invention belongs to the technical field of sintering waste heat power generation in the steel industry, and particularly relates to a waste heat utilization system for using waste heat of sintering flue gas by the aid of a single-pressure double-channel waste heat boiler. The waste heat of the sintering flue gas is used in a cascaded manner by the aid of the single-pressure double-channel waste heat boiler, medium-pressure overheated steam is generated, and the power generation efficiency of the system can be effectively improved. Besides, the waste heat utilization system is organically combined with a thermodynamic system, so that the waste heat utilization efficiency of a cooler waste heat boiler can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of sintering waste heat power generation in the iron and steel industry, and particularly relates to a waste heat boiler system for efficient utilization of sintering flue gas waste heat, which adopts a single-pressure double-channel waste heat boiler to generate high-grade medium-pressure steam and sintering cooling waste heat boiler medium-pressure steam to be connected to the grid It is used for steam turbine generating set to generate electricity and improve power generation efficiency. Background technique [0002] At present, in the total energy consumption of the sintering process, nearly 50% of the heat energy is discharged into the atmosphere as the sensible heat of the sintering machine flue gas and cooler exhaust gas, of which the waste heat of the sintering machine flue gas accounts for about 15%. The flue gas temperature of several air boxes at the tail of the sintering machine is above 300°C, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00F22B1/18
CPCY02P10/25
Inventor 刘志永周治军陈立武卜文平倪锟鹏
Owner 湖南永清环境科技产业集团有限公司