Powder feeding method and equipment of circulating fluidized bed preheating chamber, and fuel processing equipment
A circulating fluidized bed and preheating chamber technology is applied in the adjustment of the circulating fluidized bed preheating chamber, the powder feeding in the circulating fluidized bed preheating chamber, and the fields of the circulating fluidized bed boiler, which can solve problems such as the limitation of the load adjustment range.
Active Publication Date: 2020-05-15
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0004] However, the self-preheating method of Chinese patent CN201410367608 has relatively strict control conditions, and the load adjustment range is limited
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[0040] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals designate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention, but should not be construed as a limitation of the present invention.
[0041] The air Q entering the circulating fluidized bed preheating chamber 1 By powder feeding wind Q s and fluidizing wind Q f It consists of two parts, namely Q 1 =Q s +Q f . The circulating fluidized bed preheating chamber relies on the heat generated by the partial combustion of the air entering the preheating chamber and the powdered fuel to achieve self-preheating, and maintains the temperature of the preheating chamber at 600-1300...
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The invention relates to a powder feeding method of a circulating fluidized bed preheating chamber. The powder feeding method of the circulating fluidized bed preheating chamber comprises the following steps of feeding a fuel flow comprising powdery fuel and powder feeding air to a dense-dilute separation device; separating the fuel flow into a dense phase gas flow and a dilute phase gas flow on the basis of the dense-dilute separation device; and introducing the dense phase gas flow into the preheating chamber from the lower part of the circulating fluidized bed preheating chamber, and introducing the dilute phase gas flow into the preheating chamber from the bottom of the preheating chamber. The invention also relates to powder feeding equipment of the circulating fluidized bed preheating chamber. The powder feeding equipment of the circulating fluidized bed preheating chamber comprises the dense-dilute separation device which is provided with a fuel flow inlet through which the fuelflow enters, a dilute phase gas flow outlet and a dense phase gas flow outlet. The fuel flow is a mixed flow with the powdery fuel and the powder feeding air. The dilute phase gas flow outlet communicates with the bottom of the preheating chamber through a first pipeline. The dense phase gas flow outlet communicates with the lower part of the preheating chamber through a second pipeline.
Description
technical field [0001] The embodiments of the present invention relate to the field of boilers, in particular to a powder feeding method and equipment for a circulating fluidized bed preheating chamber, a fuel processing device, a method for adjusting a circulating fluidized bed preheating chamber, and a circulating flow Bed boiler. Background technique [0002] Coal is the main fossil energy in China, among which bituminous coal is the main type of coal used in power plant boilers and industrial boilers in China, while anthracite usually has difficulty in igniting and poor ignition stability under low load due to its low volatile content. x And other issues. The coal chemical industry produces a large number of by-products every year, such as pyrolysis semi-coke and gasification residual carbon, etc. Such fuels still have high carbon content and calorific value, and combustion is one of the most effective ways to recycle such fuels. However, the volatile content of this t...
Claims
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Login to View More IPC IPC(8): F23C10/10F23C10/26F23C10/18F23C10/22
CPCF23C10/10F23C10/18F23C10/22F23C10/26F23C2206/10
Inventor 满承波朱建国李诗媛刘敬樟高鸣
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI