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Desulfuration method in circulating fluid bed boiler using shell

A circulating fluidized bed and boiler technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., to achieve the effect of simple desulfurization system, easy desulfurization, and easy acquisition

Inactive Publication Date: 2008-12-17
SHANGHAI POWER EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many countries have begun to pay attention to the use of shells as desulfurizers in circulating fluidized bed boilers, but data show that in actual power plant boilers, the use of shells instead of limestone for desulfurization is still blank

Method used

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  • Desulfuration method in circulating fluid bed boiler using shell

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Experimental program
Comparison scheme
Effect test

Embodiment

[0020] Such as figure 1 As shown, it is a schematic diagram of a desulfurization method utilizing shells in a circulating fluidized bed boiler, and a desulfurization method utilizing shells in a circulating fluidized bed boiler is:

[0021] The first step, first choose CaCO 3 Shells with a mass content higher than 70% are then dried and pulverized to make granules with a particle size of 0.1 mm to 4 mm and placed in the shell granule bin 2;

[0022] In the second step, quartz sand is used as the medium material 7 of the circulating fluidized bed boiler, and the screening particle size of the medium material 7 is 0.3 mm to 4 mm. The material adding device is used to add the medium material 7 to the bottom of the circulating fluidized bed boiler 4, and it is static The thickness of the media material 7 is between 650mm;

[0023] In the third step, when running the circulating fluidized bed boiler, heat the media material 7 to 800°C with an external heat source, and at the same...

Embodiment 2

[0026] A desulfurization method using shells in a circulating fluidized bed boiler is:

[0027] The first step, first choose CaCO 3 Shells with a mass content higher than 70% are then dried and pulverized to make granules with a particle size of 0.1 mm to 4 mm and placed in the shell granule bin 2;

[0028] In the second step, quartz sand is used as the medium material 7 of the circulating fluidized bed boiler, and the screening particle size of the medium material 7 is 0.3 mm to 4 mm. The material adding device is used to add the medium material 7 to the bottom of the circulating fluidized bed boiler 4, and it is static The thickness of the media material 7 is between 600mm;

[0029] In the third step, when running the circulating fluidized bed boiler, first heat the media material 7 to 850°C with an external heat source, and at the same time adjust the air supply volume so that the media material 7 is in a fluidized state, and the fuel in the fuel tank 1 is sent through the...

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Abstract

The invention relates to a desulfuration method which utilizes seashells in a circulating fluidized bed boiler (CFBB). The method is characterized in that the seashells containing more than 70 percent of CaCO3 are selected and then dried and smashed; quartz sand is adopted as media materials and added to the bottom of the CFBB; when the CFBB is in operation, the media material is first heated by external heat source and air output is regulated to keep the media material in fluidized status; fuels in a fuel bin are sent to the CFBB by a feeding device; seashell particles are sent from a seashell particle bin to the CFBB and mixed with the media materials for burning; a separator is arranged at an outlet of a combustion chamber of the CFBB to separate particles in the fume which are again sent to the fluidized bed boiler for circular burning. The desulfuration method of the invention has the advantages of extremely low cost and higher desulfuration efficiency than limestone.

Description

technical field [0001] The invention relates to a desulfurization method using shells in a circulating fluidized bed boiler, which is used in a circulating fluidized bed boiler for shell products which are very abundant in my country and have been treated as garbage for a long time, and belongs to the technical field of environmental protection. Background technique [0002] my country has a vast sea area, with a coastline of more than 14,200 kilometers, and is rich in shellfish products. Except for a few of these shellfish products used in economic fields such as medicines and decorations, most of the shellfish are treated as garbage. In order to deal with these shellfish, It takes a lot of human and financial resources. [0003] At present, limestone is used for desulfurization in the combustion of circulating fluidized bed boilers in my country. Limestone is heated and decomposed in the furnace to make the CaCO 3 Decomposed into CaO, and SO generated by fuel combustion 2...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/81
Inventor 周文台蔡世林刘可杨勇张启楚宁宁
Owner SHANGHAI POWER EQUIP RES INST
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