A high temperature steel slag waste heat recovery treatment method and device

Abstract

The invention provides a device for recycling and treating the waste heat of high-temperature steel slag. The device comprises a fixed support, a pipeline, water pumps, a steam storage tank, a one-way pressure valve, a water replenishing tank, a well type tank device, heat-exchanging devices and a slag sealing cover, wherein the tank body of the well type tank device is made of heat-resistant concrete, and the heat-exchanging devices are fixedly mounted on the inner sides of the tank body; the heat-exchanging devices comprise steel plate protection frames and bent frames made of steel pipes; the slag sealing cover covers the well type tank device. The invention further provides a method for recycling and treating the waste heat of high-temperature steel slag, the method comprises the following steps: high-temperature liquid slag, crusted slag and half-molten slag with a temperature about 1200-1500 DEG C are poured into the well type tank device, the high-temperature steel slag is pounded by a special machine, the slag sealing cover covers the well type tank device, after heat exchange is performed on the high-temperature slag in the well type tank device and the water running in the heat-exchanging devices, the high-temperature slag is converted into water vapor, the water vapor is transferred to the steam storage tank through the water pumps and then transferred to a user. The device and method for recycling and treating waste heat of high-temperature steel slag have the advantages of energy conservation, high efficiency, security and reliability, environmental protection, zero emission and the like.

Description

Technical field: [0001] The invention relates to the technical field of steel slag treatment process equipment, in particular to a high-temperature steel slag waste heat recovery treatment method and device. Background technique: [0002] In 2012, China produced nearly 1 billion tons of crude steel, and about 0.2 tons of steel slag were produced for every 1 ton of steel produced. Based on the calorific value of 0.05t of standard coal, based on the steel production in 2012, the output of steel slag is about 200 million tons, and the heat contained in it is equivalent to the calorific value of 10 million tons of standard coal. If 1kg / 1.0MPa steam is converted according to steam production, 0.11kg standard coal is needed, and 1t standard coal can produce 9t / 1.0MPa steam, with an annual output of 90 million t / 1.0MPa steam, 1 ton steam / 1.0MPa, which can generate electricity 120 kilowatt-hours of electricity can generate 10.8 billion kilowatt-hours of electricity per year. At 0.6...

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Problems solved by technology

The common feature of the above steel slag waste heat recovery methods is to recover wet steam or low-temperature hot water with impurities, and then recover steel slag waste heat in the form of conversion. The main problems of these processes are: a. Many energy conversion times, high heat loss, The recovery rate is low; b. These hot water, steam, and hot gases containing impurities need to be purified by filtration, dust removal, etc. before they can be used, so there is a temperature drop High and large investment in equipment

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