Triple-generation system for utilizing slag-washing water afterheat by using blast furnace drum method

Abstract

The invention relates to a triple-generation system for utilizing slag-washing water afterheat by using a blast furnace drum method. The system comprises a graining tower, wherein the graining tower is sequentially communicated with a drum, a hot water tank and a heat storage regulating reservoir; the heat storage regulating reservoir comprises a precipitating heat storage tank and a graining impounding reservoir; the precipitating heat storage tank is connected with a first inlet of a heat exchange device through an afterheat water supply pump group; a first outlet of the heat exchange device is communicated with the graining impounding reservoir; a second inlet of the heat exchange device is respectively connected with a heating user and the first outlet of a refrigeration mechanism through a heating water supply pump group; 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 an indoor refrigeration user and a dehumidified blast user; the indoor refrigeration user and the dehumidified blast user are communicated with the second outlet of the refrigeration mechanism; and the graining impounding reservoir is communicated with the graining tower through a graining water supply pump group. The system is applied to triple-generation of heating, refrigerating or dehumidified blasting of a blast furnace, and is high in thermal 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 slag flushing water by a blast furnace drum 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 waste heat of ...

AI Technical Summary

Problems solved by technology

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

However, 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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