Novel high-temperature recycled sand cooling system and waste heat recovery method

Abstract

The invention discloses a novel high-temperature recycled sand cooling system and a waste heat recovery method, belonging to the technical field of sand casting structures. The novel high-temperature recycled sand cooling system comprises a vertical-tank primary cooler, a gravity dust collector or a cyclone dust collector, a flue-gas organic rankin generating set and a cloth-bag dust collector, wherein the vertical-tank primary cooler comprises a shell and a cooling apparatus, and the cooling apparatus comprises an air supply bustle pipe and a plurality of heat exchanging air supply branch pipes. The method comprises the following steps: carrying out, by a top fluidized layer, boiling fluidizing and heat exchanging for high-temperature recycled sand, dispersing the primarily-cooled high-temperature recycled sand into a cooling passage formed by heat exchanging air supply branch pipes, and further exchanging the heat of the high-temperature recycled sand in the cooling passage by virtue of cold air in the heat exchanging air supply branch pipes. By virtue of the comprehensive cooling way of heat transferring and fluidizing boiling, the cooling speed of the high-temperature sand is increased; meanwhile, since the air temperature after the heat exchanging is high, the heat recovery efficiency can be improved, and the energy consumption is reduced.

Description

technical field [0001] The invention belongs to the technical field of sand casting, and in particular relates to a novel high-temperature recycled sand cooling system and a waste heat recovery method. Background technique [0002] my country is the world's largest producer of castings. According to statistics: 1 ton of waste sand is discharged for every 1 ton of casting produced, and an equal amount of new sand is added at the same time. There is a shortage of high-quality ore sand resources in China, and the over-exploitation of new sand has caused great damage to natural resources. Therefore, the regeneration of old foundry sand is an indispensable part of modern foundry, and the thermal sand regeneration process is the current mainstream development direction. [0003] The thermal regeneration process mainly includes medium and low temperature roasting and high temperature roasting. At present, domestic thermal regeneration mostly adopts medium and low temperature roa...

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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a new vertical tank type high-temperature recycled sand primary cooling device and waste heat recovery method, which adopts a comprehensive cooling method of heat transfer and fluidized boiling to speed up sand cooling and improve waste heat recovery efficiency. To solve the problems of high-temperature sand cooling and waste heat recovery in the prior art

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