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Sulfur content removing method and desulfurizer for fluidized bed device

A fluidized bed and desulfurizer technology, applied in the field of desulfurizers, can solve problems such as low utilization rate and achieve good desulfurization effect.

Active Publication Date: 2005-04-20
IDEMITSU KOSAN CO LTD
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Problems solved by technology

[0008] In the above-mentioned furnace desulfurization method, the utilization rate of limestone or dolomite which is mainly composed of calcium as a desulfurizer is very low. In the case of high efficiency, the utilization rate of limestone is about 15-25%, and in the circulating fluidized bed combustion furnace, its utilization rate is 25-35%.

Method used

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  • Sulfur content removing method and desulfurizer for fluidized bed device

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Experimental program
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Embodiment 1

[0058] The lime filter cake manufactured by Nippon Sugar Co., Ltd. having the properties shown in Table 1 was dried, then adjusted to a maximum particle size of 2 mm or less, and the average particle size was 1.2 mm, and the fuel having the properties shown in Table 2 was pulverized into 2 mm or less. coal mix. Four types of mixtures were prepared in which the Ca content in the lime filter cake was 0, 1, 2, and 3 in molar ratio (Ca / S) relative to the sulfur content in the coal. The resulting mixture was burned in a circulating fluidized bed combustion furnace shown in Figure 1, and the SO at the combustion outlet was analyzed. x Concentration, according to the following calculation method to obtain the desulfurization rate, the results are shown in Table 3.

[0059] Desulfurization rate (%)=(a / b)×100

[0060] a=[SO4 when coal is burned alone (Ca / S=0) x Emission concentration]-(SO x discharge concentration)

[0061] b = SO during combustion alone (Ca / S=0) x Exhaust concen...

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PUM

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Abstract

The invention provides a method for removing sulfur in a fluidized bed device and a desulfurizing agent. The method of the present invention is a method for removing sulfur in gas generated in a fluidized bed furnace that burns fuel and / or raw materials using fluidized bed combustion, and is characterized in that a desulfurizer containing a lime filter cake is put into In the fluidized bed furnace. Preferably, the particle size of the lime filter cake is above 0.08mm, and the calcium content in the desulfurizer is 0.5-7 (molar ratio) relative to the sulfur content in the fuel and / or raw materials.

Description

technical field [0001] The invention relates to a sulfur removal method and a desulfurizer in a fluidized bed device. Background technique [0002] Fossil fuels such as oil and coal, industrial waste, municipal waste and other wastes often contain sulfur components. In incinerators using them as fuel or gasifiers using them as raw materials, it is necessary to remove the sulfur produced by the combustion of sulfur. Harmful sulfur oxides such as sulfur dioxide and sulfur oxide (SO x ), the combustion gas will be discharged until the concentration meeting the environmental protection standard is reached. [0003] Conventionally, the desulfurization methods used in these furnaces can be roughly divided into the following two types. [0004] (1) In-furnace desulfurization method [0005] This method is to put a desulfurizer into the furnace to adsorb and remove sulfur oxides. Usually, limestone or dolomite is used as a desulfurizer, and this method is mainly used in fluidize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23C10/00B01D53/34B01D53/50B01D53/81B01J20/04C10K1/30
Inventor 藤原尚树
Owner IDEMITSU KOSAN CO LTD
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