Blast furnace cinder flushing water heat recovery technological process system

Abstract

The invention relates to a blast furnace cinder flushing water heat recovery technological process system used for a cinder flushing water system with a single cinder flushing water cooling tower and a cooling tower pump. The technological process system comprises a heat exchange unit connected with the single cinder flushing water cooling tower in parallel, wherein a secondary water outlet pipeline of the heat exchange unit is connected with secondary water supply pumps and a peak shaving unit in series in sequence; the tail end of the peak shaving unit is connected with a secondary water supply end; and a secondary water inlet pipeline of the heat exchange unit is connected with a secondary water return end. The technological process system has the beneficial effects that the heat exchange unit is connected with the cooling tower in parallel, and the heat recovery system is unnecessary to be provided with the cinder flushing water pump by utilizing the cooling tower pump; the temperature after heat recovery from the cinder flushing water is controlled by the peak shaving unit according to the heat load change and the cinder flushing water temperature change; and the system achieves full-water-volume and full-load heat recovery from the cinder flushing water, furthest recovers the waste heat of the cinder flushing water and can be used for heat supply for heating or other purposes.

Description

technical field [0001] The invention relates to a process flow system for recovering waste heat from blast furnace slag flushing water, in particular to a blast furnace slag flushing water heat extraction process system with a single set of slag flushing water cooling tower and cooling tower pump slag flushing water system. Background technique [0002] Blast furnace ironmaking produces a large amount of high-temperature slag, which produces a large amount of slag washing water at 60-90 °C after water quenching. Small and medium-sized blast furnaces generally include a slag washing water system with a slag washing water cooling tower and a cooling tower pump. Contains solid particles, especially a large amount of suspended matter. If direct heating will cause siltation and blockage in pipes and radiators, and conventional heat exchangers for indirect heat exchange will also be blocked and cannot be used for a long period of time. Waste heat is not fully and effectively recyc...

AI Technical Summary

Problems solved by technology

[0002] Blast furnace ironmaking produces a large amount of high-temperature slag, which produces a large amount of slag washing water at 60-90 °C after water quenching. Small and medium-sized blast furnaces generally include a slag washing water system with a slag washing water cooling tower and a cooling tower pump. Contains solid particles, especially a large amount of suspended matter. If direct heating will cause siltation and blockage in pipes and radiators, and conventional heat exchangers for indirect heat exchange will also be blocked and cannot be used for a long period of time. Waste heat is not fully and effectively recycled

In terms of process flow, the existing waste heat recovery system basically does not involve the discontinuity of blast furnace slag flushing, the temperature control requirements of modern blast furnaces for slag flushing water, and does not consider the use of all water to obtain heat and switch with the original blast furnace process flow operational problems

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