Metallized furnace charge efficient preheating system and dynamic control method

Abstract

The invention belongs to the technical field of industrial solid wastes, and particularly relates to a metallized furnace charge efficient preheating system. The metallized furnace charge efficient preheating system is characterized by comprising a main control system, a monitoring subsystem, a fuel information acquisition subsystem, a flue gas purification waste heat recycling subsystem and a safety emergency response subsystem, wherein the main control system comprises an industrial controller, a gas fuel valve driving module, an oxygen valve driving module, an oxygen combustion gun lifting driving module and a dynamic calculation control module, and completes information acquisition and control of each subsystem. Compared with the prior art, the system has the beneficial effects of high automation degree, low manual operation cost, remarkable effect of increasing the adding amount of scrap steel, high efficiency, energy conservation, stable performance, high safety and reliability, convenience in operation, capability of continuously working for a long time and wide application range, and can be applied to other occasions needing high-speed heating and high-temperature melting, such as melting and removing 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 steel scrap resources and the pressure of environmental protection, the difference between the price of scrap steel and the price of molten iron will increase. From the perspective of cost, the use of steel scrap will further increase; the use of molten iron resources will still play an important role in improving efficiency and reducing consumption. How to increase the use of scrap steel 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 the application number 201911140071.0 discloses a method for utiliz...

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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