Air heating furnace cooling water supply system and control method

Abstract

The invention discloses an air heating furnace cooling water supply system and a control method, and belongs to the field of ferrous metallurgy. The air heating furnace cooling water supply system comprises multiple air heating furnace valves, an intermediate pressure water supply pump set and a secondary booster pump chamber. A switching valve I and a connecting pipe are arranged on a soft waterpipeline output from the secondary booster pump chamber. Communicated soft water pipeline branches enter the air heating furnace valves and a blast-furnace tuyere medium sleeve. A three-way pipe is arranged on soft water pipelines output from the air heating furnace valves, soft water sequentially flows through a water inlet pipe and a water outlet pipe of the three-way pipe, a branch pipe is connected with a drainage pipe of the three-way pipe, and a switching valve III is arranged on the drainage pipe. A switching valve II is arranged on the soft water pipeline connected with the water outlet pipe. According to the air heating furnace cooling water supply system and the control method, the air heating furnace valves and cooling water of blast furnace equipment can be connected together and can operate independently, it is guaranteed that a blast furnace can carry out cooling wall piping when the air heating furnace valves are cooled, washing water can be fast provided during blast furnace cooling wall washing, and even cooling of the air heating furnace valves is not influenced during blast furnace staying maintenance.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, and more specifically relates to a hot blast stove cooling water supply system and a control method. Background technique [0002] At present, the cooling water of domestic hot blast stove valves is connected with the blast furnace soft water system. For the air valve water supply, the medium pressure water is the spray water in the late stage of the blast furnace, which is rarely used at ordinary times, and a small amount of soft water consumption in the circulation process is supplied by the soft water replenishment pump. The hot blast stove is earlier than the blast furnace oven. When the hot blast stove is baked, the hot blast valve and the shutoff valve also need to be cooled by water supply. Since the soft water of the hot blast valve and the shutoff valve is connected with the soft water of the blast furnace, this requires the entire soft water system The hot blast stove can only ...

AI Technical Summary

Problems solved by technology

But its disadvantage is that the closed circulation system of blast furnace soft water is connected with the soft water of the hot blast valve and shutdown valve of the hot blast stove, so the valves of the hot blast stove cannot realize the independent water supply of the cooling equipment

But its shortcoming is that the cooling water of the hot blast stove valve is connected with the soft water of the blast furnace, and the cooling water of the hot blast stove cannot be operated independently.

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