Coal burning heat medium furnace high-precision temperature regulation and combustion control method

Abstract

The invention provides a coal burning heat medium furnace high-precision temperature regulation and combustion control method and relates to the technical field of DCS industrial control systems, in particular to large-scale chain coal bed burning heat medium furnace (heat medium furnace for short) high-precision temperature regulation and combustion control. As is generally known, the temperature control of the coal burning heat medium furnace depends on the combustion control of the coal burning heat medium furnace. Therefore, a suitable sensor and a suitable transmitter are used to obtain parameters which influence the combustion and the heat medium outlet temperature in the burning process; the factors which influence the combustion and the heat medium outlet temperature are treated differentially and destroyed by adopting multi-circuit regulation when grasping main problems, thus avoiding interaction among the steps; the control algorithm adopts sectional control, feed-forward control and self-adaptive control on the basis of normal PID. According to the scheme, the influence of nonlinearity, much interference, large lag and the like can be overcome, thus realizing automatic control in the heating process and automatic regulation in normal heating, and the actual control precision of the heat medium outlet temperature can achieve plus or minus 0.7DEG C.

Description

Technical field [0001] The invention relates to the technical field of DCS industrial control systems, and specifically refers to a large-scale chain coal seam-fired heat carrier furnace (referred to as "heat medium furnace") with high-precision temperature regulation and combustion control method. Background technique [0002] Large heat carrier furnaces (referred to as "heat medium furnaces") as large heating equipment are widely used in many industries such as chemical, petrochemical, metallurgy, textile, and plastics. The rapid development of industry is inseparable from heating equipment. Therefore, large heat medium furnaces, such as thermal energy conversion equipment, also have a relatively large market demand. However, it is difficult to control the combustion of coal-fired heat medium furnaces. When the heat load requires higher temperature accuracy, the temperature control accuracy is more difficult to achieve; the combustion is insufficient and the combustion efficie...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the difficulty in combustion control of coal-fired heat medium furnaces in the above-mentioned prior art. When the thermal load requires higher temperature accuracy, the temperature control accuracy is more difficult to achieve; the combustion is insufficient, and the combustion efficiency is low. The unburned coal ash will cause serious pollution to the environment due to the discharge of flue gas. The proposed high-precision temperature regulation combustion control system can solve the problem of temperature control of coal-fired heat medium furnaces and improve combustion efficiency. Improve productivity and improve the reliability of the safe operation of the heat medium furnace

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