Blast furnace cinder flushing water multipath heat exchanger

Abstract

The invention relates to a blast furnace cinder flushing water multipath heat exchanger of a welding plate type structure. The heat exchanger is characterized in that a heat exchanging plate beam is formed by stacking multiple heat exchanging units, each heat exchanging unit comprises multiple horizontal heat transmitting plate pieces, cinder flushing water channels are arranged on one sides of the heat transmitting plate pieces, and secondary water channels are arranged on the other sides of the heat transmitting plate pieces, no contact exists on one sides of the cinder flushing water channels, each cinder flushing water channel realizes process returning through cinder flushing water pipe boxes connected at two ends of the heat exchanging plate beam to form a single-channel cinder flushing water heat exchanging process, the heat exchanging plate beams formed by stacking the multiple heat exchanging units forms multiple parallel-connected contact-free single-channel cinder flushing water heat exchanging processes, cinder flushing water branching boxes are arranged on outer sides of flush covers of the cinder flushing water pipe boxes and realize functions of flow branching, flow collecting, connecting pipe guiding in and out and demounting flushing through in and out of cinder flushing water channel ports arranged on the pipe box flush covers, and the two secondary water pipe boxes are arranged on two sides of the heat exchanging plate beam. The heat exchanger of the structure solves the problem of blockage of cinder flushing water and is long in operating period, convenient to flush, compact in structure and high in heat transmitting 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 multi-flow heat exchanger for blast furnace slag flushing water with a 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 mainly ...

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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