Technical process system for heat removal of blast furnace cinder flushing water

Abstract

The invention relates to a technical process system for heat removal of blast furnace cinder flushing water, which is provided with two sets of cinder flushing water cooling towers and cooling tower pump cinder flushing water systems. The technical process system comprises a single set of heat exchange unit which is connected with two sets of cinder flushing water cooling towers by two sets of cinder flushing water switching valve units used for switching and regulating the flow rate; a secondary water outlet pipeline of the heat exchange unit is orderly connected in series with a secondary water supply pump and a peak regulating unit; the end of the peak regulating 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 returning end. The heat exchange unit is connected in parallel with two sets of cinder flushing water cooling towers with cold water grooves and the cooling tower pump cinder flushing water systems; by utilizing the cooling tower pump, the heat removal system needs not to arrange a cinder flushing water pump; continuous hot water supply is implemented by the cinder flushing water switching valve units; the peak regulating unit is used for regulating the temperature of the supplied secondary water according to the heat change in load and the temperature change of the cinder flushing water to control the temperature of the returned secondary water, thereby realizing control on temperature of the cinder flushing water after heat is removed. The technical system for heat removal of the burst furnace cinder flushing water realizes full-water volume total-load heat removal, recycles the afterheat of the cinder flushing water to the greatest extent, and can be used for heat supply 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 process flow system for taking heat from blast furnace slag flushing water with two sets of slag flushing water cooling towers and a 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. Large blast furnaces generally include two sets of slag washing water systems with slag washing water cooling towers and cooling tower pumps. The slag washing water contains Solid particles especially contain a large amount of suspended matter. If direct heating will cause siltation and blockage in pipes and radiators, and indirect heat exchange using conventional heat exchangers will also cause blockage and cannot be used for a long period. Therefore, the wa...

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. Large blast furnaces generally include two sets of slag washing water systems with slag washing water cooling towers and cooling tower pumps. The slag washing water contains Solid particles especially contain a large amount of suspended matter. If direct heating will cause siltation and blockage in pipes and radiators, and indirect heat exchange using conventional heat exchangers will also cause blockage and cannot be used for a long period. Therefore, the waste heat of slag washing water for many years None of them are 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 control requirements of modern large-scale blast furnaces for the temperature of slag flushing water, and does not consider the heat extraction of the entire water and the process flow of the original blast furnace. switch operation problem

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