Constant wind temperature control system for hot blast stove

Abstract

The invention provides a constant wind temperature control system for a hot blast stove, comprising the hot blast stove (2), a detection element, a regulating valve, a data acquisition unit (1) and a computer (26). The control method of the control system comprises the following processes: detection of fluid parameters and valve location signals, data acquisition, data transmission, data comparison and data correction and control adjustment, wherein the detection element and the regulating valve are arranged in a pipeline, and temperature measuring equipment is arranged on the surface of a stove body. Specific steps are as follows: dynamically calculating parameters such as the heat storage capacity of checker bricks, temperature-rise ratio, theoretical wind temperature and the like during the combustion process, and carrying out on-line adjustment of parameters such as combustion air and gas flow, preheating temperature and the like; controlling direction change of the hot blast stove by the highest setting temperature of the checker bricks, a stove top and fume; and during the air supply period, taking hot blast temperature control as a target to determine an air supply curve and air supply time. The method based on calculation of dynamic balance of on-line energy of the hot blast stove effectively controls the heat storage capacity of the checker bricks of the hot blast stove, adjusts air supply quantity and air supply time, and ensures stable output of wind temperature of the hot blast stove.

Description

technical field [0001] The invention belongs to the technical field of ironmaking blast furnace hot blast stove control in the iron and steel industry, and in particular relates to a wind temperature control system, which is used when the blast furnace uses a stable wind temperature. Background technique [0002] The hot blast stove is an auxiliary equipment of the blast furnace, and its function is to provide a stable blast temperature for the blast furnace. There are many operating parameters of the hot blast stove, including temperature, pressure, flow and other parameters. At the same time, the hot blast stove includes processes such as combustion, furnace replacement and air supply. How to effectively control the operating parameters and process control of the hot blast stove is the key to the control of the hot blast stove . [0003] At present, there are mainly the following methods for the control of hot blast stoves. According to the control method, it can be divid...

AI Technical Summary

Problems solved by technology

Overcome the defect of unstable air temperature of the current hot blast stove, improve the automatic control system of the air temperature of the hot blast stove, and combine with some advanced control technologies such as automatic combustion of the hot blast stove or expert system during use to achieve stable control of the air temperature of the hot blast stove

Images