Fly ash secondary combustion system and method for improving fly ash germanium grade

A secondary combustion and combustion system technology, applied in the field of pulverized coal combustion, can solve problems such as not giving a more detailed plan, and achieve the effects of overcoming the large carbon content of fly ash, increasing the slag collection rate, and improving efficiency

Active Publication Date: 2015-12-09
YANTAI LONGYUAN POWER TECH
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  • Description
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Problems solved by technology

However, it does not give a more detailed plan for how to continue the secondary combustion

Method used

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  • Fly ash secondary combustion system and method for improving fly ash germanium grade

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Embodiment 1

[0037] Such as figure 1 As shown, the fly ash secondary combustion system includes: the pre-chamber 1 of the vortex furnace, the slag catcher 2, the slag pool 3, the waste heat boiler 5, the high-temperature cyclone separator 6, the rear heating surface 7 and the air preheater 9, the vortex Furnace pre-chamber 1, slag catcher 2, waste heat boiler 5, high-temperature cyclone separator 6, rear heating surface 7 and air preheater 8 are sequentially connected, slag pool 3 is located at the bottom of vortex furnace pre-chamber 1; cold air Enter through the cold air inlet of the air preheater 8, and the hot air generated by heating is discharged through the hot air outlet, which is used to provide the air required for the combustion of germanium-containing lignite, and at the same time carry the fly ash 11 separated by the high-temperature cyclone separator 6 To the two hot air inlets located on both sides of the pre-chamber 1 of the vortex furnace, enter the pre-chamber 1 of the vo...

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Abstract

The invention relates to a fly ash secondary combustion system and a method for improving fly ash germanium grade. The fly ash secondary combustion system comprises a combustion system, a fly ash separation system and a waste heat recovery system which are sequentially connected. Cold air is heated by the waste heat recovery system to become hot air which can carry fly ash separated by the fly ash separation system into the combustion system for secondary combustion. Due to the adoption of the fly ash secondary combustion system, the fly ash germanium grade in the germanium extraction process can be effectively improved, meanwhile, the slag capture rate and the boiler efficiency of a cyclone furnace are improved, the content of carbon in fly ash is reduced and germanium-bearing lignite is utilized more effectively.

Description

technical field [0001] The invention relates to the technical field of pulverized coal combustion, in particular to a fly ash secondary combustion system and a method for improving the grade of fly ash germanium. Background technique [0002] Germanium is an excellent semiconductor material and is widely used in infrared optics, optical fiber communication, aerospace, medicine and other fields. It is in great demand in the global market, and its annual consumption is an important criterion for measuring a country's technological level. At present, the production of metal germanium in my country is mainly through the method of extracting germanium element by burning lignite containing germanium. [0003] At present, the pre-chamber of the vortex furnace is mainly used for extracting germanium from lignite. For example, CN101186975A discloses a method for extracting germanium from lignite, which uses the pre-chamber of the vortex furnace to extract germanium. The chamber is m...

Claims

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Application Information

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IPC IPC(8): F23C9/06
Inventor 褚晓亮杨天亮张玉斌葛茂杰王伟平付玉玲
Owner YANTAI LONGYUAN POWER TECH
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