A combined circulating fluidized bed reactor for oxidative decarburization of coal gasification ash
A circulating fluidized bed, coal gasification ash technology, applied in the direction of chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex process and high cost, and achieve sufficient reaction, high decarbonization rate, and strong heat exchange capacity Effect
Active Publication Date: 2018-11-23
TSINGHUA UNIV +1
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Problems solved by technology
[0004] Aiming at the shortcomings of the above-mentioned complex technical process and high cost, the present invention provides a combined circulating fluidized bed device for oxidative decarburization of coal gasification ash
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Embodiment 1
[0056] The structure of combined circulating fluidized bed device for oxidative decarburization of coal gasification ash in this embodiment is as follows: figure 1 As shown, in this embodiment, the combined circulating fluidized bed device comprises a combination of a fast fluidized bed and a dense-phase fluidized bed; the fast fluidized bed is a riser-type bed with uniform diameter; the dense-phase flow The fluidized bed includes a bed section, a conical connecting section and an enlarged section; the gasification ash inlet 101, the fluidization gas inlet 102, the circulating ash inlet 104 and the heat exchange medium inlet 105 are arranged at the lower end of the fast fluidized bed, and the heat exchange medium is arranged at the upper end Outlet 107 and fluid outlet 108, with plate gas distributor 103 and heat exchange tube bundle 106 inside; circulating ash outlet 113, ash outlet 114, and fluidization gas inlet 115 are arranged at the lower end of the dense-phase fluidized ...
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The invention discloses a coal gasification ash oxidation decarburization combined circulating fluidized bed reactor comprising a fast fluidized bed and a turbulent fluidized bed, wherein a gasification ash inlet, a fluidization gas inlet, a circulating ash inlet and a heat exchange medium inlet are formed in the lower end of the fast fluidized bed; a heat exchange medium outlet and a fluid outlet are formed in the upper end of the fast fluidized bed; a plate type gas distribution device and a heat exchange pipe bundle are arranged in the fast fluidized bed; a circulating ash outlet, an ash outlet and a fluidization gas inlet are formed in the lower end of a dense phase fluidized bed; a heat exchange medium inlet and a heat exchange medium outlet are formed in a bed layer section; a fluid inlet and a smoke outlet are formed in the upper end of the bed layer section; a ring pipe type gas distribution device, a heat exchange pipe bundle and a gas-ash separation device are arranged in the bed layer section; the fluid outlet in the upper end of the fast fluidized bed is connected with the fluid inlet in the upper end of the dense phase fluidized bed by a pipeline; the circulating ash outlet in the lower end of the dense phase fluidized bed is connected with the circulating ash inlet in the lower end of the fast fluidized bed. The reactor has the advantages of being stable to operate, high in reaction decarburization rate, high in reaction efficiency, high in heat exchange capability, and the like.
Description
technical field [0001] The invention belongs to the field of coal gasification ash recovery, in particular to a combined circulating fluidized bed reactor for oxidative decarburization of coal gasification ash. Background technique [0002] my country's fossil energy presents a resource endowment of "rich coal, poor oil and little gas". The new coal chemical industry, which uses coal as raw material to produce petrochemical substitute products, has developed rapidly, but it has also caused severe environmental pollution. Coal-to-petrochemical alternative products mainly use syngas-methanol as the key platform raw material. Coal gasification is the source of the coal chemical industry, and related technologies are developing rapidly. Lurgi furnace, BGL furnace, GE gasifier, multi-nozzle furnace, Tsinghua furnace, aerospace furnace, Shell furnace, GSP furnace and other coal gasifiers have achieved rich industrialization results. Typical coal gasification technology mainly fe...
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IPC IPC(8): B01J8/24
Inventor 王金福唐强郑妍妍王铁峰高光耀王建友孟小鹏
Owner TSINGHUA UNIV