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Sulfur content removing method and desulfurizer for fluidized bed device

A technology of fluidized bed and desulfurization agent, applied in the field of desulfurization agent, can solve the problems of low utilization rate and achieve good desulfurization effect

Active Publication Date: 2009-04-29
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
  • Sulfur content removing method and desulfurizer for fluidized bed device
  • Sulfur content removing method and desulfurizer for fluidized bed device

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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 the circulating fluidized bed combustion furnace shown in Figure 1, the SOx concentration at the combustion outlet was analyzed, and the desulfurization rate was obtained by the following calculation method, and the results are shown in Table 3.

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

[0060] a=[SOx emission concentration when coal is burned alone (Ca / S=0)]-(SOx emission concentration)

[0061] b = SOx emission concentration when coal is burned alone (Ca / S=0) ...

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Abstract

The invention is aimed to provide a method of removing sulfur in a fluid bed furnace, and a desulfurizing agent. In this method of removing the sulfur in a gas generated in the furnace in the fluid bed furnace for burning the fuel and / or raw material by fluidized combustion, the desulfurizing agent including a lime cake is charged into the furnace. Preferably, a particle diameter of the lime cake is 0.08 mm or more, and a mol ratio of Ca in the desulfurizing agent to the sulfur in the fuel and / or raw material is 0.5-7.

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 (SOx) such as sulfur dioxide and sulfur oxides are not discharged until the concentration meets the environmental protection standard. [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 fluidized bed furnaces. [0006] (2) Flue ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/00B01D53/34B01D53/50B01D53/81F23C101/00F23J15/02B01J20/04C10K1/30
Inventor 藤原尚树
Owner IDEMITSU KOSAN CO LTD
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