Comprehensive waste heat utilization device in zero-water sodium metasilicate production process

Abstract

The invention relates to the technical field of inorganic silicide production, in particular to a comprehensive waste heat utilization device in the zero-water sodium metasilicate production process, the comprehensive waste heat utilization device comprises a hot blast stove, a flue gas outlet of the hot blast stove is communicated with a heating medium inlet of a first heat exchanger, and a heating medium outlet of the first heat exchanger is communicated with a heating medium inlet of a second heat exchanger; a heating medium outlet of the second heat exchanger is communicated with a heating medium inlet of a third heat exchanger; a heating medium outlet of the third heat exchanger is communicated with a desulfurization tower; and a preheated air outlet of the first heat exchanger is communicated with an air inlet of a dryer, an air outlet of the dryer is communicated with a bag-type dust collector, an exhaust outlet of the bag-type dust collector is communicated with a pulping tank, and an exhaust outlet of the pulping tank is communicated with a dedusting chimney. By the adoption of the whole comprehensive waste heat utilization device, heat of high-temperature flue gas and heat of hot air extracted in the drying process of the dryer are recycled, and resource waste is avoided.

Description

technical field [0001] The invention relates to the technical field of inorganic silicide production, in particular to a comprehensive utilization device for waste heat in the production process of zero-water sodium metasilicate. Background technique [0002] At present, when producing zero-water sodium metasilicate, inorganic silicide production enterprises mostly use the drum drying method to produce, that is, use a hot blast stove to heat the air, and the heated air enters the dryer to dry the sprayed zero-water sodium metasilicate. Drying; in actual production, in order to keep the water vapor in the hot air not exceeding the specified value, it is necessary to extract hot air to supplement the air. The temperature of the extracted hot air is about 150-190°C. If it is directly discharged, it will cause waste of resources. In addition, the temperature of the flue gas after the flue gas of the hot blast stove is heated to the air is relatively high, the temperature is abou...

AI Technical Summary

Problems solved by technology

[0002] At present, when producing zero-water sodium metasilicate, inorganic silicide production enterprises mostly use the drum drying method to produce, that is, use a hot blast stove to heat the air, and the heated air enters the dryer to dry the sprayed zero-water sodium metasilicate. Drying; In order to keep the water vapor in the hot air not exceeding the specified value in actual production, it is necessary to extract hot air to supplement the air. The temperature of the extracted hot air is about 150-190°C. If it is directly discharged, it will cause waste of resources

In addition, the temperature of the flue gas after heating the air with the flue gas of the hot blast stove is relatively high, the temperature is about 160-240°C, the heat in the flue gas cannot be used, and the waste of direct emission resources is large

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