Output-controllable turning knocking heat exchange ash-escaping-prevention type slag granulating and heat energy recycling device

Abstract

The invention discloses a slag granulating and heat energy recycling device, and belongs to the technical field of metallurgy slag treatment and waste heat recycling. The device comprises a slag controllable output combination composed of an oblique cone slag tank, a cutting part and a pushing part, a metallurgy slag granulating and heat exchange roller combination, a cooling combination, a drive combination and the like; the cutting part and the pushing part enable slag to be controllably put into a roller, normal-temperature fine slag in the roller wraps the slag and turns and rolls along with rotation of the roller, is knocked through falling of a weight lifted by a cantilever fixed into the roller and is turned, rolled and knocked in a mixed manner by weight slag, the slag is granulated into normal-temperature fine slag and is output from the other end of the roller, an exhaust opening and an ash-escaping-prevention seal are arranged, an internal circulation roller water tank combination and an external connected cooling circulation combination are adopted in cooling; the internal circulation cooling combination outputs steam when cooling water absorbs heat and reaches the rated pressure, and the external circulation cooling combination is connected with the exterior through a rotating joint so as to continuously supply water and continuously output steam; metallurgy slag granulation is achieved, the value of the slag is improved, and heat energy recycling of the output steam is achieved.

Description

technical field [0001] The invention relates to a metallurgical slag granulation and a heat recovery device thereof. The invention belongs to the technical field of metallurgical slag treatment and waste heat recovery and utilization. [0002] technical background [0003] Metallurgical production produces large amounts of slag. For example, iron and steel smelting produces a large amount of high-temperature slag (mainly blast furnace slag and steel slag, 1400-1600℃). At present, blast furnace slag is processed by flushing slag in the iron and steel industry. There are mainly hot stuffing method, water quenching granulation, drum method, and wind quenching method for steelmaking slag, but none of them can effectively recover waste heat. The waste heat of slag is a huge amount of unutilized high-heat energy in iron and steel enterprises. The heat taken away by each ton of slag is about equivalent to the heat released by 60kg of standard coal. Therefore, treating steel slag...

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Problems solved by technology

These methods and processes have not been industrialized due to the following reasons, such as: too high energy consumption, too low heat recovery efficiency, too low subsequent utilization value of slag products, and too high maintenance costs for complex structures of processing equipment, etc.

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