Waste-heat utilization triple generation system for blast furnace slag water employing minter process

Abstract

The invention relates to a waste-heat utilization triple generation system for blast furnace slag water employing a minter process. The waste-heat utilization triple generation system comprises a granulating device, wherein the granulating device is orderly communicated with a slag-water separating device, a settling pond and a sediment heat storage pool, wherein the sediment heat storage pool is connected with a first inlet of a heat exchange device by virtue of a waste heat water supply pump group; a first outlet of the heat exchange device is communicated with a granulating reservoir; a second inlet of the heat exchange device is respectively connected with the outlet of a heating user and the first outlet of a refrigeration mechanism through heating water supply pump groups; the inlet of the heating user and the first inlet of the refrigeration mechanism are communicated with the second outlet of the heat exchange device; the second inlet of the refrigeration mechanism is communicated with the second outlet of the refrigeration mechanism by virtue of an indoor refrigeration user and a dehumidified blast user; the outlet of the granulating reservoir is communicated with the granulating device by virtue of the granulating water supply pump group. The system is applied to triple generation of heating, refrigerating or blast furnace dehumidified blasting, and is high in heat efficiency and stable in water quality.

Description

technical field [0001] The invention relates to a waste heat utilization system, in particular to a triple supply system for utilization of waste heat of blast furnace slag flushing water. 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 waste heat of blast furnace sla...

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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

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

In view of the impurities and suspended solids in the slag flushing water, if the conventional fine filter material is used for filtration, it is very easy to cause the slag particles to harden in the filter device and make the filter system invalid

If the conventional dosing method is used for chemical dosing, the cost will be huge due to the large amount of chemical volatilization at high temperature

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