A blast furnace cooling stave waste heat utilization system and application method thereof

Abstract

The invention provides a waste heat utilization system for the cooling wall of a blast furnace. The waste heat utilization system comprises a blast furnace body and an evaporating cooling tower. The evaporating cooling tower is connected with an absorption type heat pump through a cooling wall circulating pipe in parallel. The evaporating cooling tower and the absorption type heat pump which are connected in parallel are connected with a cooling wall circulating pump and the blast furnace body in series through the cooling wall circulating pipe. A first valve and a second valve are installed at the front end and the rear end of the evaporating cooling tower respectively. A fifth valve and a sixth valve are installed at the front end and the rear end of the absorption type heat pump respectively. The system is simple in structure, installation and operation are convenient, the absorption type heat pump is used for recycling waste heat of low-temperature water in a blast furnace cooling wall circulating system, high-temperature water is made to be supplied to a user for heating and other use, heat of the blast furnace cooling wall circulating system is fully utilized, and energy is saved.

Description

technical field

[0001] The invention specifically relates to a blast furnace cooling wall waste heat utilization system and an application method thereof, which are applied to blast furnace cooling wall waste heat recovery in ironmaking and the like. Background technique

[0002] In the metallurgical industry, in order to protect the structure and equipment of the blast furnace body such as ironmaking from high temperature damage, it is necessary to continuously cool the blast furnace body to keep it within a certain temperature range. At present, the cooling scheme adopted for blast furnace cooling is to use soft water circulation to take away the heat of the blast furnace body, and then transfer the heat to cooling water and outdoor air through the evaporative cooler, and the heat absorbed by the cooling water is discharged to the atmosphere by the cooling tower.

[0003] However, this cooling method eventually exhausts all the heat emitted by the blast furnace to the atmo...

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