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Method and system for recovering waste heat from INBA slag washing water of blast furnace

A waste heat recovery system and slag flushing water technology, applied in the direction of improving process efficiency, etc., can solve problems such as poor waste heat recovery effect, poor heat exchange effect, complex facilities, etc., to reduce wear, prolong service life, and ensure safety and stability Effect

Inactive Publication Date: 2012-09-19
涉县亿玮坤节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat exchanger in this system also adopts the immersion type that can only be applied to the bottom filter method, which has poor heat exchange effect and waste heat recovery effect, and the system has complex facilities and low implementation

Method used

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  • Method and system for recovering waste heat from INBA slag washing water of blast furnace
  • Method and system for recovering waste heat from INBA slag washing water of blast furnace

Examples

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Effect test

Embodiment Construction

[0022] Such as figure 1 As shown, the blast furnace INBA slag flushing water waste heat recovery system is composed of a filter 2, a water pump 3 and a heat exchanger 4.

[0023] The cycle process of the blast furnace slag washing water is as follows: the high temperature slag washing water in the upper part of the hot water pool 1 is filtered through the primary filter 2 to remove larger particles; the slag washing water from the primary filter flows into the water pump 3 for pressurization; The enlarged slag washing water flows into the secondary filter for swirling and slag removal, and some smaller particles are filtered out; the slag washing water that has been filtered twice enters the tertiary filter for the third filtration to ensure that it flows into the heat exchange The water quality of the slag flushing water in the device 4 is better, which plays a role in protecting the heat exchanger 4; the slag flushing water after the triple filtration enters the heat exchang...

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Abstract

The invention discloses a method and a system for recovering waste heat from IBNA slag washing water of a blast furnace. The system is formed by the connection of a filter, a water pump, a heat exchanger and a matched electric power meter, and the recovering method is that the high temperature slag washing water in a hot water tank is subjected to filtering and pressurizing and then flows into the heat exchanger for heat exchanging with water used by heat consumers. The method and the system have the advantages that short-process INBA slag washing water is high in temperature, and recovering and utilizing effects are good; water qualities of the filtered slag washing water are good, pipelines are protected from being abraded, and the heat exchanger is protected; and the water used by the heat consumers is clean water and is subjected to heat exchanging with the slag washing water by means of the heat exchanger, and the safety and stability of facilities of the heat consumers are guaranteed.

Description

technical field [0001] The invention relates to waste heat recovery and utilization, in particular to waste heat recovery and utilization of blast furnace INBA slag flushing water in the metallurgical industry. Background technique [0002] In the blast furnace ironmaking process of steel plants, the temperature of the slag produced is very high. Most ironmaking enterprises quench the slag into water slag through high-speed water flow and granulate it. This process can produce a large amount of high-temperature slag-washing water. The hot INBA method precipitates and filters the high-temperature slag washing water and then circulates the slag washing. The slag washing effect is poor and the water consumption is large. In order to ensure the recycling effect of the slag washing water, it is necessary to cool the slag washing water after sedimentation and filtration, and then recycle the slag washing after cooling down, such as the bottom filter method and the cold INBA metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B3/08
CPCC21B2400/024C21B2400/072C21B2400/08Y02P10/20
Inventor 刘森
Owner 涉县亿玮坤节能科技有限公司
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