Gas pressure layering control method of pulse-combustion industrial furnace

Abstract

The invention discloses a gas pressure layering control method of a pulse-combustion industrial furnace, namely, the gas pressure is divided into two layers and corresponded with normal load and small load working condition of the industrial furnace according to the workload condition of the industrial furnace, two channels gas control loops are adopted to carry out the gas pressure control, a pressure transmitter collects the gas pressure information and feedbacks to each control valve to adjust the opening; when the industrial furnace is in normal load working condition, the control valve of one channel gas control loop is conducted, the control valve opening is in 20%-100%, the control valve of the other channel is closed; when the industrial furnace is in small load working condition, the control valve of one channel gas control loop is closed, the control valve of the other channel is dredged, the control valve opening is in 20%-100%. In the invention, control defect of the traditional furnace gas pressure single control valve loop is overcome, and the adjusted linearity of the control valve is improved and the control accuracy of the gas pressure is ensured.

Description

technical field [0001] The invention relates to a pulse combustion industrial furnace gas pressure stratification control method. Background technique [0002] Generally, the gas pressure control of industrial furnaces with pulse combustion takes the furnace cavity and the entire working state as a whole, and most of them adopt single control valve and single loop control. The gas transmitter is set on the gas main pipe at the end of the control loop and collects gas pressure information, and the gas pressure control is realized by adjusting the opening of the control valve; the single control valve single loop can be used as a furnace under the premise of ensuring the gas flow under the normal load of the furnace. When the kiln is working at a small load, the small gas flow will cause the control valve to work in a small opening range. Due to the limitation of the characteristics of the control valve equipment itself, the small opening range of the control valve greatly re...

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Problems solved by technology

Due to the limitation of the characteristics of the control valve equipment, the small opening range of the control valve greatly reduces the linearity of the control valve adjustment, resulting in poor control accuracy of the furnace gas pressure, which has a greater impact on the furnace temperature control accuracy, material heating quality and energy consumption. big impact

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