Blast furnace profile monitoring system

Abstract

The invention discloses a blast furnace profile monitoring system which mainly comprises a PLC (Programmable Logic Control) system, a DSC (Dynamic Stability Control) system, an OPC (OLE for Process and Control) server, an SQL (Structured Query Language) database technology, a serial port isolation technology, an asynchronous communication technology and a WEB display technology. The blast furnace profile monitoring system is characterized in that a blast furnace data collection system and treatment system, a blast furnace copper cooling wall temperature slag and skin thickness calculation system and a blast furnace type fluctuation prewarning system are respectively established on such a basis, and all subsystems are organically combined through OPC serial port communication, an SQL database and a high-speed Ethernet. The invention can efficiently monitor the slag skin thickness of a heat surface of the copper cooling wall in a blast furnace high heat loading region i.e. a blast furnace profile, form a high-speed blast furnace type and condition information channel with strong calculation capability between the blast furnace and a main control chamber, guide blast furnace operation under the abnormal furnace conditions of slag skin thickening or thinning in the blast furnace high heat loading region and the like and ensure stable and smooth blast furnace condition as well as long service life of the blast furnace.

Description

technical field [0001] The invention relates to a real-time on-line monitoring system for the temperature of the hot surface of the copper cooling wall of a modern large-scale blast furnace and the inner shape of the blast furnace. Background technique [0002] The energy consumption of the blast furnace process accounts for about 60% of the total energy consumption of the iron and steel industry. From the initial investment and construction of the blast furnace to the later smelting production, and then to the intermediate repair and overhaul during the period, the investment in blast furnace maintenance is huge. Therefore, iron and steel enterprises at home and abroad have tapped the potential of blast furnaces to maximize the benefits of blast furnaces by improving the utilization coefficient of blast furnaces and strengthening smelting. The service life of the blast furnace is greatly reduced, how to give full play to the production capacity of the blast furnace without...

AI Technical Summary

Problems solved by technology

Since the modern large-scale blast furnace adopts the operating policy of "high utilization factor, low coke ratio, large coal injection, and long life", when the coal injection rate is close to 180kg / t, the bosh, furnace waist, and lower part of the furnace body become extremely high heat load areas, in the In the area where the soft melting zone is formed, it is scoured by high-temperature and high-speed gas flow, the heat flow intensity is large, and the temperature changes greatly. The slag skin on the hot surface of the copper stave is prone to change. , causing fluctuations in furnace conditions

According to the long-term follow-up investigation and analysis of furnace conditions, in addition to equipment and raw materials, 80% of the fluctuations in furnace conditions are related to changes in the operating furnace type, especially the uncontrollable fluctuation of the furnace temperature due to the large area and frequent shedding of slag skin; Thickness will cause abnormal distribution of gas flow, and then pipes, material collapse, etc., even if the material distribution system with loose edges is used, it will not be effective; if the thickness is serious, even if the furnace cleaning measures are used in a short time, there will be no obvious effect

The vicinity of the hot surface of the copper cooling stave of the blast furnace is a harsh area with high temperature, high pressure, high corrosion, and high thermal vibration. It is not allowed to install testing equipment. Even if testing equipment is installed, its accuracy and reliability cannot be guaranteed. Can not meet the requirements of continuous production of modern large blast furnace

[0003] In the text of the patent "Intelligent Monitoring Method for Blast Furnace Staves" (publication number CN101319256A, publication date December 10, 2008), the application object is cast iron staves of blast furnaces. The core model of heat transfer is extracted by nonlinear regression, and the detection model of the maximum temperature value of the stave hot surface is obtained by combining the core model and artificial neural network, and the monitoring software is formed. The main problem to be solved is to monitor the working status of the cast iron stave and ensure The safety of the stave does not involve the monitoring of the blast furnace copper stave and the inner shape of the blast furnace

[0004] In the text of the patent "A Method for Measuring Blast Furnace Lining" (publication number CN101275829A, published on October 1, 2008), the data detected by thermocouples are used to calculate The method for the erosion thickness of the blast furnace hearth is implemented in the lower hearth area of ​​the blast furnace, and does not involve the monitoring of the thickness of the slag skin and the inner shape of the blast furnace in the high heat load area of ​​the blast furnace

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