A kind of high-efficiency preheating system and dynamic control method of metallized charge

Abstract

The invention belongs to the technical field of industrial solid waste, and in particular relates to a high-efficiency preheating system for metallized charge, which is characterized in that a main control system, a monitoring subsystem, a fuel information acquisition subsystem, a flue gas purification waste heat reuse subsystem and a safety It consists of an emergency response subsystem. The main control system includes an industrial controller, a gas fuel valve drive module, an oxygen valve drive module, an oxygen lance lift drive module, and a dynamic calculation control module, which completes the information collection and control of each subsystem. . Compared with the prior art, the present invention has the following beneficial effects: high degree of automation, low labor cost, significant effect of increasing the amount of scrap steel added, high efficiency and energy saving, stable performance, high safety and reliability, convenient operation, and long-term continuous work. , The characteristics of a wide range of applications can be used in other occasions that require high-speed heating and high-temperature melting, such as melting and removal equipment for steel slag and iron slag.

Description

technical field [0001] The invention belongs to the technical field of industrial solid waste, and in particular relates to a high-efficiency preheating system and a dynamic control method for metallized charge. Background technique [0002] With the increase of domestic scrap steel resources and the increase of environmental protection pressure, the difference between scrap steel price and molten iron will increase. From the perspective of cost, the use of scrap steel will further increase; the use of iron water resources will still play an important role in improving efficiency and reducing consumption. How to increase the amount of scrap steel used and balance the impact of scrap steel and molten iron on cost and consumption needs to be combined with the actual equipment and process, requiring us to be more refined in electric furnace and converter smelting. [0003] The Chinese invention patent with application number 201911140071.0 discloses a method for utilizing wast...

AI Technical Summary

Problems solved by technology

This control method only involves the parameters of the production process, without further control of flue gas purification and safety emergency, the scheme is incomplete, the precision is not high, and production safety cannot be guaranteed

[0005] At present, the mixed combustion of gaseous gas and industrial pure oxygen has a good energy utilization rate. Pure oxygen combustion has many advantages such as greatly reducing exhaust gas, nitrogen oxide emissions, saving fuel, and reducing equipment size, but people are generally worried about oxygen There are potential safety hazards after mixing, easy explosion and other safe use problems, as well as the problem of massive oxidation and loss of metallic iron, as well as environmental pollution problems such as flue gas purification after combustion and waste heat recovery. The difficulty of mixed application is high, so that the actual equipment Manufacture and application are limited

Therefore, it is a feasible technical direction to improve the preheating efficiency of the preheating system and reduce the influence of its unfavorable factors through dynamic control with higher control precision, but the related content has not been reported yet.

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