Movable bed device for recovering sensible heat of high-temperature bulk materials

Abstract

The invention discloses a movable bed device for recovering sensible heat of high-temperature bulk materials. The device comprises a movable bed; the movable bed comprises furnace walls and collectingbins; the furnace walls are encircled to form two symmetrical accommodating cavities with large tops and small bottoms; the two accommodating cavities are separated by a middle furnace wall; the collecting bins are formed in the bottoms of the accommodating cavities; lean-phase zone buried pipes are arranged at the upper parts of the conical accommodating cavities; scrapers are arranged at the lower parts of the lean-phase zone buried pipes; wind distribution devices are arranged at the lower parts of the scrapers; and dense-phase zone buried pipes are arranged in space between the wind distribution devices and flat pushing scrapers. The device overcomes the technical bottlenecks of slag particle heat returning, bonding, low conversion rate of glass bodies, low afterheat recovery efficiency and the like, is uniform in specific material layer, facilitates slag discharge, is high in heat recovery efficiency, and can effectively and efficiently recover high-temperature sensible heat of granulated blast furnace slag particles.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery of high-temperature solid bulk materials, and in particular relates to a moving bed device for recovering the sensible heat of semi-melted-wide-screened high-temperature slag particles produced by dry centrifugal granulation. Background technique [0002] China is currently the world's largest steel producer, and its steel output has remained the world's largest for 17 consecutive years. In 2016, China's pig iron production reached 700 million tons, and blast furnace slag containing huge heat will be produced during the process of smelting pig iron. The temperature of blast furnace slag is generally between 1400 ~ 1550 ℃, and each ton of slag contains (1260 ~ 1880) × 10 3 The sensible heat of kJ is equivalent to 60kg standard coal. Under the current ironmaking technology in my country, 0.3 tons of blast furnace slag is produced for every ton of pig iron produced. Based on the current...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a moving bed device for recovering the sensible heat of high-temperature bulk materials, so as to overcome the serious waste of high-quality waste heat resources of blast furnace slag; Not easy to return heat, high heat recovery efficiency, high glass conversion rate, etc., can be effectively applied to recover high temperature sensible heat of granulated blast furnace slag particles

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