Multi-path heat exchanger for blast furnace slag flushing water

Abstract

The invention relates to a multi-path heat exchanger for blast furnace slag flushing water, and the multi-path heat exchanger is of a welding plate structure. Multiple heat exchange units are assembled and stacked into a heat exchange plate bundle, each heat exchange unit comprises multiple horizontally-placed heat transfer plates, one side of the heat transfer plate is provided with a slag flushing water channel, the other side of the heat transfer plate is provided with a secondary water channel, one side of the slag flushing water channel is contactless, each slag flushing water channel is folded through slag flushing water pipe boxes connected to the two ends of the heat exchange plate bundle so as to form a contactless single-channel slag flushing water heat exchange flow path, and the heat exchange plate bundle assembled and stacked by multiple heat exchange units forms multiple contactless single-channel slag flushing water heat exchange flow paths which are connected in parallel; the outer side of a flat cover of each slag flushing water pipe box is provided with a slag flushing water diversion box, and the slag flushing water diversion box realizes the functions of flow diversion, flow collection, adapter tube importing and exporting, disassembling and flushing through an inlet and an outlet of a slag flushing water channel on the flat cover of the pipe box; and two pairs of secondary water pipe boxes are arranged on both sides of the heat exchange plate bundle. The structure of the heat exchanger can be used for solving the blocking problem caused by slag flushing water; and the heat exchanger is long in operation cycle, convenient to flush, compact in structure and high in heat transfer efficiency.

Description

technical field [0001] The invention relates to heat exchange equipment for recovering waste heat of blast furnace slag flushing water to heat secondary water, in particular to a blast furnace slag flushing water narrow plate multi-flow heat exchanger with welded plate structure. Background technique [0002] Blast furnace ironmaking produces a large amount of high-temperature slag, and after water quenching, a large amount of slag washing water at 60-90 °C is produced. The slag washing water contains solid particles, especially a large amount of suspended matter. If it is directly heated, it will cause sedimentation and blockage in pipes and radiators. Conventional heat exchangers for indirect heat exchange will also be blocked and cannot be used for a long period of time. Therefore, the waste heat of slag flushing water has not been fully and effectively recycled for many years. [0003] At present, the heat exchangers used for waste heat recovery from slag flushing water ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the slag flushing water contains a large amount of solid particles, especially a large amount of suspended matter, which is very easy to silt and block at the entrance of the heat transfer element of the heat exchanger and inside the heat transfer element. The present invention overcomes the existing problems There are deficiencies in the existing technology, and a blast furnace slag flushing water heat exchanger is provided to prevent silting and clogging

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