Waste heat recovering device of high-temperature metallurgy slag particles

Abstract

The invention provides a waste heat recovering device of high-temperature metallurgy slag particles. The device comprises a middle hopper, a boiler body, a steam pocket, a superheater, an evaporator, an economizer and a discharging machine, wherein the middle hopper is arranged above the material inlet of the boiler body; a refractory material is arranged in the boiler body and a rectangle cavityis formed; the boiler body is divided into a storage section and a work section from top to bottom; the superheater, the evaporator and the economizer are successively arranged in the work section from top to bottom and respectively consist of single or multiple heat exchange pipe groups; the two ends of each heat exchange pipe are respectively connected to a water inlet header and a water outletheader of each heat exchange pipe group; the water inlet header is connected with an distribution header through a distribution pipe; the water outlet header is connected with a converge header through a converge pipe; the steam pocket is connected with the water outlet header; the outlet end of the superheater is connected with a steam pipe network or steam turbine; and the discharging machine is installed at the outlet of the boiler. By using the waste heat recovering device, uniform heat exchange can be realized, the yield and the quality of the steam are improved, and the recovery efficiency of waste heat is high.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery in the metallurgical industry, and in particular relates to a waste heat recovery device for high-temperature metallurgical slag particles. Background technique [0002] Metallurgical slag (such as blast furnace slag, nickel slag, copper slag, alloy slag) is a by-product discharged during the metal smelting process. Its discharge temperature is relatively high and contains a large amount of waste heat and energy. Metallurgical slag dry granulation waste heat recovery process is a process in which metallurgical slag is in direct or indirect contact with heat transfer medium for granulation and waste heat recovery without consuming new water. This process can not only recover waste heat of metallurgical slag with high quality , and does not consume slag washing water, almost no harmful gas is discharged, which reduces the environmental pollution caused by the treatment of metallurgical s...

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Problems solved by technology

[0004] Aiming at the disadvantages of the waste heat recovery process of dry granulation of metallurgical slag, such as large air-slag ratio, high power consumption, secondary energy loss, and high investment cost, the present invention provides a high-temperature metallurgical slag waste heat recovery device, including an intermediate hopper, a boiler furnace Body, steam drum, superheater, evaporator, economizer and discharge machine, the middle hopper is set above the inlet of the boiler body, the boiler body is a welded rectangular furnace shell, and the built-in refractory material forms a rectangular cavity , fixed on the boiler bracket, the boiler furnace body is divided into storage section and working section from top to bottom, the height of the storage section is 1 / 4~1 / 2 of the height of the working section, and the superheater, evaporator, and economizer are arranged from the top Arranged in the working section from bottom to bottom, they are composed of single or multiple heat exchange tube groups. Each heat exchange tube group is composed of single or multiple boiler heat exchange tubes. The two ends of the heat exchange tubes are respectively connected to the heat exchange On the inlet header and outlet header of the pipe group, the inlet header is connected to the distribution header through the distribution pipe, and the outlet header is connected to the collection header through the collection pipe. The inlet end of the economizer is connected to a water pump, and the outlet end is connected to the The steam drum is connected to the inlet of the superheater, and the distribution header is connected to the distribution header through the circulating water pump, the collection header is connected to the steam drum, and the outlet of the superheater is connected to the steam pipe network or steam turbine; a discharge machine is installed at the boiler outlet

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