A constant liquid level control device for granulating tower slag-water mixture

Abstract

The invention relates to the technical field of constant and stable control devices for slag-water mixture liquid levels in slag flushing granulation towers, and in particular relates to a constant-liquid level control device for a slag-water mixture of a granulation tower. Slag and slag flushing water are mixed into the slag-water mixture in the granulation tower; the liquid level value of the slag-water mixture is measured by a pressure transmitter; the liquid level value is fed back to a PLC program to join in PID operation, and the operation result is a frequency; a high-voltage variable-frequency motor operates with the frequency, and then a slag water pump is driven for pumping the slag-water mixture back into a dehydrator for dehydration processing. The liquid level value can be manually set according to process requirements, and the control device is capable of controlling the liquid level of the slag-water mixture in the granulation tower to be at the set value. As a result, the constant-liquid level control device for the slag-water mixture of the granulation tower is capable of accurately and stably controlling the slag-water mixture at the set liquid level; the slag treatment effect is excellent, the stable and smooth production of a blast furnace is guaranteed, and the environment pollution is reduced while the economic benefit of iron making is increased.

Description

technical field [0001] The invention relates to the technical field of a constant liquid level control device for a slag-water mixture in a slag washing and granulation tower, in particular to a constant liquid level control device for a slag-water mixture in a granulation tower. Background technique [0002] The slag treatment process in the blast furnace ironmaking production is very critical. The molten iron and slag flow out from the blast furnace taphole together. The newly added 3# taphole of Jinan Steel 1#1750 blast furnace adopts the granulation tower slag treatment system. The slag enters the granulation tower along the slag ditch, mixes with the slag washing water, and is granulated to form a slag-water mixture. The slag-water mixture is pumped by the slag water pump to The dehydrator performs dehydration to complete the slag treatment process. The slag washing water and the slag react in the granulation tower, and the slag is washed and granulated by the high-pre...

AI Technical Summary

Problems solved by technology

The newly added 3# Tiekou granulation tower of Jinan Iron and Steel 1#1750 blast furnace was originally designed as a gas-type liquid level gauge. The mixture overflows, the granulation tower cannot be used, and the blast furnace is forced to block the iron hole in the middle of tapping, which has a great impact on the blast furnace condition and affects production

In view of the inaccurate measurement value defect of the above-mentioned gas-type liquid level gauge in the process of field use, after the research of our technicians, combined with the analysis of the medium characteristics of the slag-water mixture on site, we invented a constant and stable liquid level of the slag-water mixture in the slag washing granulation tower. control device

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