A blast furnace wall slag skin thickness monitoring system and method

Abstract

The invention relates to a blast furnace brickwork slag shell thickness monitoring system and method and belongs to the technical field of blast furnace monitoring. The system comprises a background processing system and a client system, wherein the background processing system comprises a data acquisition module, a data validity judgment module, a cooling water temperature calculating module, a cooling water heat transfer coefficient calculating module, a thermal load calculating module and a slag shell thickness calculating module; the client system comprises a slag shell monitoring and calculating parameter setting module, a slag shell timing sequence thickness display module, a slag shell real-time thickness display module and a brickwork thickness alarm processing module. The method comprises the following steps: determining the characteristics of brickwork heat transfer, calculating the temperature and the heat transfer coefficient of cooling water, calculating the quantity of heat taken away by the cooling water, calculating the heat quantity transferred from the interior of a blast furnace to the hot surface of the wall body of a cooling wall, and establishing the relational expression of calculating the slag shell thickness. According to the system and method, an objective and quantized basis is provided for knowing the brickwork slag shell condition during the blast furnace smelting process, a blast furnace operator is helped to timely know the condition of the brickwork, so that reasonable operating measures are taken, the stable operation of the blast furnace is ensured, and the service life of the blast furnace is prolonged.

Description

technical field [0001] The invention belongs to the technical field of blast furnace monitoring, and relates to a monitoring system and method for slag skin thickness of a blast furnace wall. Background technique [0002] At present, the blast furnace wall slag skin thickness monitoring system can be divided into two categories according to its core calculation method: one is to calculate the regional heat load according to the temperature difference between the cooling water supply and drainage, and then average the heat load to the furnace wall to calculate the slag skin thickness; The second type is to calculate the thickness of the slag skin according to the gas temperature in the furnace, the cooling intensity and the slag hanging temperature. The main problem of the first type of monitoring system is: the heat load calculated according to the temperature difference between the cooling water inlet and outlet water only represents the average heat load, and the actual he...

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Problems solved by technology

The main problem of the first type of monitoring system is: the heat load calculated according to the temperature difference between the cooling water inlet and outlet water only represents the average heat load, and the actual heat load difference of each part of the blast furnace wall is relatively large, so the calculation of the slag skin thickness based on the average heat load is also not accurate. There is a large error with the actual

The main problems of the second type of monitoring system are: it is not operable and the slag thickness is not accurate. Since the relationship between the heat taken away by the cooling water, the wall temperature and the thickness of the slag skin is not considered, the slag skin thickness calculated by this method will only be It changes with the change of gas temperature, and the change of gas temperature is often difficult to obtain in practice, and if the slag skin suddenly falls off, this method cannot be calculated

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