Sectional soft water closed circulation cooling system of blast furnace body

Abstract

The invention provides a sectional soft water closed circulation cooling system of blast furnace body, which belongs to the technical field of cooling of iron-making furnaces. The system comprises an upper cooling area and a lower cooling area; the lower cooling area comprises a lower soft water supply main, a lower cooling equipment circular water supply pipe, a furnace bottom water cooling pipe circular water supply pipe, a lower cooling equipment small water inlet branch pipe, lower cooling equipment, a lower cooling equipment small backwater branch pipe, lower cooling equipment circular backwater pipe, a furnace bottom water cooling pipe, a furnace bottom water cooling pipe circular backwater pipe and a lower soft water return main; the upper cooling area comprises an upper soft water supply main, a main control valve, an upper cooling equipment circular water supply pipe, an upper cooling equipment small water supply branch pipe, a small branch pipe control valve, upper cooling equipment, an upper cooling equipment small backwater branch pipe, an upper cooling equipment circular backwater pipe and an upper soft water return main. The sectional soft water closed circulation cooling system has the following advantages: the cooling systems of the upper area and the lower area are completely independent, thereby preventing mutual hampering between the upper area and the lower area; so it is guaranteed that the water volume in the cooling equipment is uniformly distributed, cooling effects are improved, and the service life of the cooling equipment is prolonged.

Description

technical field [0001] The invention belongs to the technical field of ironmaking furnace body cooling, and in particular provides a segmented soft water closed circulation cooling system for a blast furnace body, which is suitable for cooling any capacity-level blast furnace. Background technique [0002] The soft water closed circulation cooling system is an important technical means for cooling the blast furnace body. Its characteristic is that the system is completely closed. It is returned to the pump room by the return pipe, and then sent to the pump unit for recycling after being cooled by the heat exchanger. The system has the following problems in actual production operation: [0003] 1. When the cooling water volume of the cooling equipment in the upper area of ​​the blast furnace, such as the furnace bosh, furnace waist and furnace body, needs to be individually adjusted or cut off due to changes in heat load or due to production operations, leak detection, and b...

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Problems solved by technology

[0003] 1. When the cooling water volume of the cooling equipment in the upper area of ​​the blast furnace, such as the furnace bosh, furnace waist and furnace body, needs to be individually adjusted or cut off due to changes in heat load or due to production operations, leak detection, and burnout, due to the upper and lower All the cooling equipment connected in series will affect the water consumption of the corresponding cooling equipment in the lower area of ​​the blast furnace, such as hearth and furnace bottom, and affect the stable operation of the cooling system, and the cooling equipment in the upper area cannot be operated independently

[0004] 2. Due to the different heat loads in the upper and lower areas of the blast furnace, the required water volume and layout of the cooling equipment are also different. Usually, the water volume in the lower area is more than that in the upper area. The resistance loss of the series pipeline of the equipment is not uniformly distributed in the 360°circumferential direction of the furnace body, so that the water entering the cooling equipment cannot be evenly distributed

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