Three-supply system for waste heat utilization of slag flushing water by blast furnace bottom filtration method

Abstract

The invention relates to a triple co-supply system for utilization of waste heat of blast furnace bottom-filtration-method slag flushing water. The triple co-supply system comprises a granulation apparatus; the granulation apparatus is successively communicated with a slag sluice, a filter tank and a waste heat reservoir; the waste heat reservoir is connected with the first inlet of a heat exchange apparatus through a waste heat water-supply pump group; the first outlet of the heat exchange apparatus is communicated with a granulation reservoir, and the second inlet of the heat exchange apparatus is respectively connected with a heating user and the first outlet of a cooling mechanism through a heating water-supply pump group; the heating user and the first inlet of the cooling mechanism are communicated with the second outlet of the heat exchange apparatus; the second inlet of the cooling mechanism is communicated with an indoor cooling user and a dehumidified blasting user; the indoor cooling user and the dehumidified blasting user are communicated with the second outlet of the cooling mechanism; and the granulation reservoir is communicated with the granulation apparatus through a granulation water-supply pump group. The system is used for triple co-supply of heating, cooling and blast furnace dehumidified blasting and has the advantages of high thermal efficiency and stable water quality.

Description

technical field [0001] The invention relates to a waste heat utilization system, in particular to a triple supply system for waste heat utilization of slag flushing water by a blast furnace bottom filtration method. Background technique [0002] Energy is the basis for human survival. my country has the world's second largest energy system, but its per capita energy resources are only half of the world's level, and its overall energy use efficiency is seriously low compared to developed countries. Facing this reality, the task of saving energy is urgent and arduous. As a pillar industry of the national economy, the iron and steel industry plays an important role in my country's modernization drive, but it is also a major energy consumer and polluter. It will generate a lot of waste heat and energy while consuming energy and promoting material transformation. At present, the recycling rate of waste heat and waste energy of iron and steel is quite low. For example, the wast...

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Problems solved by technology

However, since the slag water contains a large amount of impurities, it is very easy to cause all heat exchangers and terminal equipment to be blocked, resulting in failure of the heating system

When the heat exchanger has been used for a period of time, it can only be replaced due to serious fouling, which is expensive

For the impurities and suspended solids contained in the slag flushing water, if the conventional fine filter material is used for filtering, it is very easy to cause the slag particles to harden in the filter device, making the filter system invalid; A large amount of chemicals volatilize under high temperature conditions, and the cost is huge

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