A walking heating furnace vaporization cooling system and method thereof

Abstract

The invention relates to the field of vaporization cooling systems, in particular to a walking heating furnace vaporization cooling system and a method thereof. A vaporization cooling system for a walking heating furnace of the present invention comprises a soft water tank, a deaerator, a feed water pump and a circulation cooling system composed of a steam drum, a downcomer, an upcomer and a circulating pump, which are sequentially connected by pipelines, and it also includes A waste heat recovery system consisting of the first steam pipeline, the second steam pipeline, the hot water pipeline, and the heat exchanger; the steam and water outlet of the steam drum is connected to the deaerator through the first steam pipeline, and connected to the factory area through the second steam pipeline. The steam pipe network is connected, the other is connected to the heat medium inlet of the heat exchanger through the hot water pipe, the cold water inlet of the heat exchanger is connected to the supply soft water, the soft water outlet of the heat exchanger is connected to the soft water tank, and the heat medium outlet of the heat exchanger The sewage is discharged outward through the expansion vessel; the invention reduces the flow resistance by optimizing the layout of the pipeline and improves the recovery and utilization rate of the waste heat by adding a waste heat recovery system.

Description

technical field [0001] The invention relates to the field of vaporization cooling systems, in particular to a walking heating furnace vaporization cooling system and a method thereof. Background technique [0002] The walking heating furnace is an important equipment in the hot rolling process. Its function is to heat the billet to soften it and facilitate subsequent rolling. It is the main body of energy consumption in the hot rolling process, and its energy consumption accounts for about 65% of the energy consumption of steel rolling production. During the billet heating process, the movable water beam and the fixed water beam bearing the weight of the billet need to be cooled at all times to maintain sufficient strength and safety. There are two main ways to cool the water beam of the heating furnace: one is open circuit or direct cooling of circulating water, and the other is vaporization cooling. Compared with direct water cooling, the steam generated by evaporative c...

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Problems solved by technology

This evaporative cooling system has the following defects: 1. The pipeline arrangement is complicated, which increases the tube length and flow resistance, and a lot of distribution headers are installed, which also increases the space occupation; The steam and hot water are directly drained, and a lot of heat is wasted; three, in order to ensure the flow of cooling water, each process uses electric water pumps that consume more energy; four, after the circulating water runs for a long time in the water beam The calcium and magnesium ions contained will deposit scale in the pipeline, increase the resistance, and reduce the operating efficiency of the vaporization cooling system

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