Hermetic circulating water system for blast furnace

Abstract

The invention discloses a hermetic circulating water system for a blast furnace. The system comprises the blast furnace. The water outlet end of the blast furnace is connected to a water inlet pipe through a water return pipeline, a water outlet pipeline of a water pump is connected to the water inlet end of the blast furnace, a switchable first valve body for controlling blast furnace backwater in the water return pipeline to flow into the water pump is arranged on the water return pipeline, a pressure stabilizing pipeline is arranged between the blast furnace and the water pump, the pipe diameter of the pressure stabilizing pipe is smaller than the pipe diameter of the water return pipeline, and a switchable second valve body is arranged on the pressure stabilizing pipeline. By additionally arranging the pressure stabilizing pipeline, the system solves the problem that the water injection pressure of the hermetic circulating water system for the blast furnace is unstable after the water pump is overhauled and avoids instantaneous decompression alarm and massive water supplement as a result of an unstable pressure, and the service lives of accessories are prolonged, and the operating stability of the whole system is improved.

Description

technical field [0001] The invention relates to the technical field of blast furnace operation, and more specifically, relates to a blast furnace sealed circulating water system. Background technique [0002] The existing blast furnace soft water system is a closed cycle, and the stability of the system pressure is very important. If the fluctuation is large or the pressure is lost instantaneously, it will affect the stable production of the blast furnace and cause a large amount of water replenishment. And the pipeline at the inlet and outlet valve ends must be vented before the maintenance work can be carried out. After the overhaul is completed, due to the large pressure difference between the front and rear of the valve, negative pressure is formed, and a large torque is required to open the valve plate, which causes the valve plate to work only after opening a certain opening, resulting in the valve plate The instantaneous opening is large, and the soft water in the sy...

AI Technical Summary

Problems solved by technology

After the overhaul is completed, due to the large pressure difference between the front and back of the valve, negative pressure is formed, and a large torque is required to open the valve plate, which causes the valve plate to work only after opening a certain opening, resulting in the valve plate The instantaneous opening is large, and the soft water in the system is directly poured into the water pump and pipeline after the maintenance is completed, causing an instantaneous pressure loss alarm and a large amount of water replenishment. At the same time, it also causes certain impact damage to the auxiliary components, shortens the service cycle, and affects the safe and stable operation of the blast furnace.

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