Steam temperature characteristic optimal adjusting method for pulverized coal combustion direct current furnace

Abstract

The invention provides a steam temperature characteristic optimal adjusting method for a pulverized coal combustion direct current furnace. The steam temperature characteristic optimal adjusting method comprises a stable-state combustion adjusting test and a dynamic steam temperature characteristic test, wherein the direct current furnace is provided with a DCS control system. The steam temperature characteristic optimal adjusting method comprises the following steps: step S1: implementing test steps of the stable-state combustion adjusting test; step S2: implementing test steps of the dynamicsteam temperature characteristic test, wherein a part of the dynamic steam temperature characteristic test is based on the corresponding results obtained by the stable-state combustion adjusting testin the step S1; and step S3: enabling the DCS control system of the direct current furnace to integrate a final optimal curve of each test of the stable-state combustion adjusting test in the step S1and the dynamic steam temperature characteristic test in the step S2, and through combining a part of test results obtaining running guiding cards in the step S1 and the step S2, optimizing the steamtemperature characteristic of the direct current furnace. Through the adoption of the steam temperature characteristic optimal adjusting method disclosed by the invention, under the premise that theequipment is not transformed, the potential of the DCS system and the potential of boiler main and auxiliary equipment are sufficiently promoted, the combustion of the boiler is under the best condition, and the optimizing of the steam temperature characteristic is realized.

Description

technical field [0001] The invention relates to the field of boiler debugging, in particular to a method for optimizing and adjusting steam temperature characteristics of a pulverized coal combustion once-through furnace. Background technique [0002] With the long-term operation of deep low-nitrogen combustion in coal-fired power plants and the continuous improvement of the AGC load response requirements of the power grid, during daily operation, especially when the load is rapidly raised and lowered, the main and reheat steam temperatures of the boiler frequently appear to be significantly lower, which seriously affects It ensures the economical and efficient operation of the current large-capacity and high-parameter units. Steam temperature optimization control refers to the method and means of maintaining the steam temperature at the outlet of the boiler superheater and reheater within the specified limit range during the operation of the boiler. When the boiler is runn...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for optimizing and adjusting the steam temperature characteristics of a pulverized coal combustion once-through furnace, and to solve the technical problems of unsatisfactory effects and large deviations in steam temperature of various optimization and adjustment methods for the steam temperature characteristics of a once-through furnace in the prior art

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