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Coal-grading conversion poly-generation device and method for producing coal gas, tar and carbocoal on circulating fluid bed

A circulating fluidized bed and fluidized bed technology, used in coke ovens, petroleum industry, manufacturing of combustible gases, etc., can solve the problems of low coal utilization efficiency and pollution, and achieve high yield, simple process and low CO content. Effect

Active Publication Date: 2010-04-07
ZHEJIANG UNIV
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Problems solved by technology

Coal occupies an absolute dominant position in my country's primary energy, but the current coal utilization efficiency is low and pollution is serious

Method used

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  • Coal-grading conversion poly-generation device and method for producing coal gas, tar and carbocoal on circulating fluid bed
  • Coal-grading conversion poly-generation device and method for producing coal gas, tar and carbocoal on circulating fluid bed

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Embodiment Construction

[0021] As shown in the accompanying drawings, the circulating fluidized bed coal staged conversion coal gas tar semi-coke polygeneration device includes a fluidized bed retort furnace 17 and a circulating fluidized bed gasification furnace 3; the fluidized bed retort furnace 17 has a small bottom and a large structure , the upper part of the fluidized bed carbonization furnace 17 is a dilute phase zone, the lower part of the fluidized bed carbonization furnace 17 is a dense phase zone, the bottom of the fluidized bed carbonization furnace 17 is provided with an air chamber, and the upper part of the circulating fluidized bed gasification furnace 3 It is a dilute-phase zone, and the lower part of the circulating fluidized bed gasifier 3 is a dense-phase zone, and the bottom of the circulating fluidized bed gasifier 3 is provided with an air chamber, and the dense-phase zone of the fluidized bed carbonization furnace 17 passes through the feeder 15 and The circulating fluidized b...

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Abstract

The invention discloses a coal-grading conversion poly-generation device and a method for producing coal gas, tar and carbocoal on a circulating fluid bed. The device combines a circulating fluid bed gasification-furnace with a fluid bed gas retort. The gas retort is a normal-pressure fluid bed and uses circulating coal gas as the fluidizing medium; fuel is firstly heated and cracked in the gas retort to precipitate high-heating-value fugitive constituents comprising coal gas and tar; the heat absorbed by the gas retort is provided by a high-temperature thermal-circulation material in the circulating fluid bed gasification-furnace; the carbocoal part obtained after the coal is retorted is cooled and discharged through the bottom of the gas retort, and part of the carbocoal is conveyed to the circulating fluid bed gasification-furnace along with the circulating material to heat the circulating material; and the medium-temperature coal gas from the gas retort is processed in a dust removal way and cooled by a coal gas purification system, the tar is recycled, and the purified coal gas is output for industrial and civil use, thereby realizing the poly-generation of coal gas, tar and carbocoal in one set of device and realizing the grading conversion and the high-efficiency comprehensive utilization of coal.

Description

technical field [0001] The invention relates to a combustion device and method, in particular to a circulating fluidized bed coal graded conversion coal gas tar semi-coke polygeneration device and method. Background technique [0002] my country's energy reserve structure is rich in coal, low in gas, and poor in oil. The lack of my country's oil resources made my country's dependence on foreign oil reach 50% in 2008, and it is expected to exceed 60% by 2020, which will make my country extremely vulnerable to the impact of changes in the international oil market. Coal occupies an absolute dominant position in my country's primary energy, but at present, the utilization efficiency of coal is low and the pollution is serious. Obviously, the energy problem has become one of the bottlenecks of national economic development. Therefore, the development of new technologies for high-efficiency comprehensive utilization of coal and low pollution emissions is the primary task of my c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/66C10B53/04
Inventor 方梦祥王勤辉骆仲泱施正伦余春江王树荣程乐鸣周劲松高翔倪明江岑可法
Owner ZHEJIANG UNIV
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