Circular seam control device and process for novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system

Abstract

The invention discloses a circular seam control device and process for a novel converter one-time dedusting OG (Oxygen Converter Gas Recovery) system. The circular seam control process comprises the following steps of: accessing a position feedback signal of the circular seam control device to a PLC (Programmable Logic Controller) and accessing a signal output from the PLC to a servo valve; in a blowing intermission, concentratedly manually operating a circular seam cone and a smoke hood and manually setting openness; in the initial blowing stage, enabling a three-way valve to be at a diffusion side, igniting and discharging coal gas of a converter, keeping the position of the smoke hood fixed, and enabling the circular seam control device to be in an concentrated and automatic state of the servo valve; in the intermediate blowing stage, enabling the three-way valve to be at a recovery side, roughly adjusting the height and the micro-differential pressure of the smoke hood, reducing the fluctuation of the micro-differential pressure, and setting the circular seam control device to be in a concentrated and automatic state of the serve valve. The circular seam control device comprises the circular seam cone, a hydraulic station and the PLC. The smoke hood is used for matching control over the circular seam control device; the hydraulic station is used for supplying power; the PLC is used for transmitting the signal to the servo valve and controlling the servo valve to actuate; the servo valve is used for driving and controlling the circular seam cone; and an absolute encoderis additionally arranged on the smoke hood. The circular seal control device and process disclosed by the invention have the advantages of reduced number of installation equipment, increase of energyrecovery, low investment and high system precision.

Description

technical field [0001] The invention relates to a primary dedusting device used for recovering coal gas in converter steelmaking production. Background technique [0002] Converter gas is produced in the process of converter steelmaking. In order to recover the usable by-product gas, a dedusting process is used for cooling and dedusting. At present, the process methods used in primary dust removal of converter include: dry method, semi-dry method and wet method. Among them, the wet dust removal method is divided into: one article and two articles, traditional OG system and new OG system. New OG system equipment includes: spray tower, circular seam device and dehydration tower. [0003] Among them, the annular seam device has a Venturi structure, which is mainly used to realize the fine dust removal of the converter gas. At the same time, it is also used to adjust the differential pressure at the furnace mouth, control the recovery start time and the recovery gas volume. T...

AI Technical Summary

Problems solved by technology

However, in the actual production process, the differential pressure at the furnace mouth will fluctuate with the production stage of the converter and the range of lowering the cover

At the same time, in order to ensure the quality and quantity of recovered gas, the range and speed of the circular seam cone need to be strictly limited

The traditional form of direct adjustment can no longer meet the existing process requirements

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