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

The technology of a heat carrier furnace and a control method is applied in the combustion method, adjusting the supply of fuel, controlling the combustion, etc., which can solve the problems of emission, environmental pollution, and difficulty in controlling the combustion of a coal-fired heat medium furnace, and achieves the effect of improving troubleshooting.

CN101749730BActive Publication Date: 2011-05-18COSCO SHIPPING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2011-05-18

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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.
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Description

technical field

[0001] The invention relates to the technical field of DCS industrial control systems, and specifically refers to a high-precision temperature-regulated combustion control method for a large-scale chain coal seam heat carrier furnace (referred to as "heat medium furnace"). Background technique

[0002] As a large-scale heating equipment, large-scale heat carrier furnaces (referred to as "heat medium furnaces") are widely used in many industries such as chemical industry, petrochemical industry, metallurgy, textile, and plastics. The rapid development of industry is inseparable from heating equipment. Therefore, there is a relatively large market demand for thermal energy conversion equipment such as large-scale heat medium furnaces. However, the combustion control of the coal-fired heat medium furnace is relatively difficult. When the heat load requires high temperature accuracy, the temperature control accuracy is relatively difficult to achieve; the combus...

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and embodiment the present invention will be further described

[0031] The following is a schematic diagram of the combustion control regulation loop (such as figure 1 shown). A high-precision temperature-regulated combustion control method for a coal-fired heat carrier furnace of the present invention includes heat medium temperature regulation and furnace negative pressure regulation. The main objects for regulating combustion are blower, induced draft fan and fire grate. The blast and induced air provide the oxygen required for combustion; the fire grate provides fuel for combustion.

[0032] The temperature control of the coal-fired heat medium furnace depends on the combustion control of the coal-fired heat medium furnace. The high-precision control of the temperature of the heat medium in the present invention: the temperature of the inlet and outlet of the hot coal, the flow rate of the hot coal, the pressure of t...