Control method and apparatus for combustion of storage type pulverized coal fired boiler

Abstract

The embodiment of the invention discloses a method and a device for controlling combustion of an inter-bin pulverized coal fired boiler. The method comprises the following steps: acquiring an average value of the tertiary air pressure of the inter-bin pulverized coal fired boiler; according to the average value, a pre-set tertiary air feedforward coefficient, a measuring value for oxygen level in the boiler and a preset value for the oxygen level, generating a secondary air quantity adjusting instruction; and sending the secondary air quantity adjusting instruction to a secondary air quantity adjustment executor so as to control the combustion of the inter-bin pulverized coal fired boiler by the secondary air quantity adjustment executor according to the secondary air quantity adjusting instruction. The method and the device have the advantages of solving the problem of unstable combustion of the boiler due to the drastic change of the tertiary air quantity existing in the prior art and improving the combustion stability of the inter-bin pulverized coal fired boiler.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a combustion control method and device for a storage type pulverized coal boiler. Background technique [0002] Storage type pulverized coal boilers are widely used in medium-sized power plants, especially the main furnace type of thermal power enterprises. The air distribution system of the storage type pulverized coal boiler is divided into primary air, secondary air and tertiary air in turn, which are respectively blown into the furnace from different parts of the boiler. The primary air can send the pulverized coal in the pulverized coal bin into the furnace, and at the same time provide oxygen for the combustion of the pulverized coal; the secondary air is directly blown into the furnace through the burner, which can mix, disturb and intensify the combustion of the pulverized coal. The secondary air volume is controlled according to the oxygen measurement value in the furna...

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Problems solved by technology

[0005] The embodiment of the present invention provides a storage-type pulverized-coal boiler combustion control method and device to solve the problem in the prior art that the combustion performance of the storage-type pulverized-coal boiler decreases due to the sharp change of the tertiary air volume. Further, it can also improve Combustion Efficiency of Storage Pulverized Coal Boiler

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