Blast furnace soft water closed-recirculation cooling system

Abstract

The invention relates to a blast furnace soft water closed-recirculation cooling system and belongs to the technical field of blast furnace cooling. The system comprises a high-pressure cooling unit, a low-pressure cooling unit, a degassing tank, a heat exchanger, a pressure-stabilized expansion tank set, a water supply pump set, a high-pressure water supply pipe, a low-pressure water supply pipe, a high-pressure return water pipe, a cooling-wall water supply ring pipe, a bottom water supply ring pipe, a return water ring pipe, and a return water master pipe. The system has the advantages that the high-pressure pump set and the low-pressure pump set are integrated into a water supply pump set for the blast furnace soft water closed-recirculation cooling system; the low-pressure pump set, water supply pumps, safety water supply pumps and coolant water pipes are fewer in the integrated water supply pump set, and water supply and return pipelines are fewer and simplified; the low-pressure cooling equipment is cooled by cooling the cooling water of the high-pressure cooling equipment, so that the amount of cooling total-circulation water and lift are reduced for blast furnaces. Therefore, initial investment is reduced, and subsequent operational cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of blast furnace cooling, and in particular provides a closed circulation cooling system of blast furnace soft water, which is suitable for blast furnace cooling systems of any volume. Background technique [0002] Blast furnace soft water closed cycle cooling was first used in Europe in the 1960s. At first, high-temperature soft water was used for cooling, and then it gradually evolved into low-temperature soft water cooling with the development of ironmaking technology. At present, low-temperature soft water is used for closed circulation cooling of blast furnace soft water. Blast furnace soft water closed cycle cooling has become one of the key core technologies for water saving, energy saving, environmental protection and longevity in modern large-scale blast furnace ironmaking production due to its advantages of small water replenishment, no return water pressure relief, and pipeline scaling. [0003] ...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of this design is that the pipeline system is relatively complex, the test run is difficult to debug, the operation is safe, the maintenance measures are complicated, and the reliability is not good; the biggest advantage is that the system cooling circulation water is small (the corresponding heat exchanger soft water refrigerant water Smaller), about 50-60% of the circulating water volume of the independent system, the initial construction investment and operating power consumption are smaller than those of the independent system

[0004]

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