Flushing system and flushing method for blast furnace soft water pipeline

Abstract

The invention discloses a flushing system for a blast furnace soft water pipeline. A communication pipe is additionally arranged between a soft water main water supply pipe and a main return pipe. A blind plate is additionally arranged between the soft water main return pipe and a soft water supply pump group. A water supply pipe is additionally arranged at the end of the soft water supply pump group. The water supply pipe is connected with a water outlet pipe of a refrigerant water pool and further communicated with the refrigerant water pool, so that the soft water main water supply pipe andthe main return pipe are communicated at the bottom position of a blast furnace. A drain pipe I is additionally arranged between the portion, behind a cooler, of the main return pipe and the refrigerant water pool. The invention further discloses a flushing method for the blast furnace soft water pipeline. The startup of a soft water pump is ensured by the method of introducing water from the refrigerant water pool. By introducing normal-pressure water in front of a secondary pressurization pump, the startup of the secondary pressurization pump is ensured, and the flushing of the whole main pipe and branch pipes is completed; and backwashing of the cooling wall is directly carried out through normal-pressure water, so that the flushing speed is high, the flushing efficiency is improved, and the flushing quality is good through pipe cutting inspection after flushing.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a method for flushing blast furnace soft water pipelines. Background technique [0002] The blast furnace soft water system is a closed circulation system. The soft water is used for the cooling of the blast furnace bottom water cooling pipe, cooling wall, straight blow pipe, tuyere jacket, hot blast valve and shutoff valve. When the soft water is supplied to the bottom of the blast furnace by the soft water supply pump group, it is divided into two paths, one path is supplied to the furnace top through the furnace bottom water cooling pipe and the direct blow pipe, the other path is supplied to the furnace top through the cooling wall, and the two paths of water flow to the furnace top at the furnace top After the soft water ring pipe, it flows into the secondary pressurization pump group. After pressurization, it is divided into two channels, one is used for cooling the...

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Problems solved by technology

For example, Chinese patent: application number: 201711337221.8, publication date: May 18, 2018, the invention discloses a backwashing method for the stave of a blast furnace, which can ensure the flushing effect of the stave without affecting the soft water main pipe that has been flushed , branch pipes, but the patent does not involve the flushing method of the main pipe and branch pipes, and the flushing water enters the cooling wall from the furnace bottom water-cooled pipe into the furnace top water supply ring pipe, and due to the small flow rate, the flushing of each cooling wall branch pipe cannot be performed at the same time It needs to be implemented in batches according to the flow of water supply

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