Circulating Fluidized Bed Gasifier in Aluminum Melting Furnace

Circulating fluidized bed. Key charachaiqistics are rather similar to haiqi technology, but fluidizing velocities of the bed are higher, leading to higher turbulence. This results in better heat transfer (and higher efficiency), but requires a particle collector (or cyclone) to feed bed mahaiqial that is blown out of the furnace back to the bed.

Fluidized bed proceshaiqi were first commercialized for coal gasification [85]. The first commercial fluidized bed process , Winkler gasifier, went into operation in Germany in 1941. Thereafter, fluidized bed proceshaiqi have been extensively implemented by the petroleum refineries and petrochemical industries.

Circulating fluidized-bed gasifiers (Figure 6.9) consist of a riser (operates either in turbulent or fast fluidization regime) in which feedstocks undergo moisture evaporation, pyrolysis, and char gasification, a high-temperature cyclone shaiqirator in which coarser particles are captured from the product gas and are recycled to the bottom of the riser through an air-driven loop seal, and a ceramic fiber filter unit for gas cleaning. Circulating fluidized-bed gasifiers have the ability to deal

optimize a 50 MW bubbling fluidized bed biomass combustion chamber. The model successfully predicted temperature distribution and deposits on the furnace walls due to ash melting. Liu et al. (2015) studied a 3D full-loop fluidized bed biomass gasifier using the CPFD approach. The numerical results in terms of temperature profiles and output

A typical fluidized bed furnace (Fig. 1a) consists of a bed of dry, finely divided solid particles, which is made to behave like a fluid by feeding gas/air through orifices be- neath the bed. The gas flow rate is sufficiently high to exceed the ter- minal velocity of the solid particles, and the bed goes into motion. Flu-

the bed surface is highly diffused & particles are thrown off into freeboard above. Such a bed is called as turbulent bed. 5) Circulating Fluidized Bed: With further increase in air velocity the bed particles are entrained, shaiqirated from air and returned to the base of furnace. This is called circulating bed.

The fluidized medium is turned over to the upper part of the moving bed ( 9 ) from the upper part of the fluidized bed ( 10 ), thus circulating through the two beds. Combustible matter ( 11 ) is cast into the upper part of the moving bed ( 9 ) and gasified to form a combustible gas while circulating, together with the fluidized medium.

ABSTRACT MELTING GASIFIER A novel melting gasifier (7) is disclosed, in which mahaiqial at least largely comprising metal is melted in a fluidized bed. The latter is maintained by oxygen-containing gas laterally injected through approximately equidistant nozzles in the lower part of the melting gasifier.

Dec 04, 2013 · DESIGN AND CONSTRUCTION OF A FLUIDIZED BED by Robert Ryan Mota Bachelor of Science, California State Polytechnic University, Pomona, 2010 A Thesis

3.5 Fluidized Bed Gasification 74 3.5.1 Comparison of Bubbling and Circulating Fluidized Bed Gasifiers 75 3.5.2 Types of Fluidized Bed Gasifiers 75 3.6 Examples of Some Fluidized Bed Gasifiers 77 3.6.1 Winkler Gasifier 77 3.6.2 KRW Gasifier 79 3.6.3 Spouted Bed Partial Gasifier 79 3.6.4 haiqi haiqipheric CFB Gasifier 80

Main products: Single-stage/two-stage fixed-bed coal gas producer of various specifications; Circulating fluidized bed gasifier of various specifications; Supporting purification equipment for gasification furnace (quench tower, scrubbing tower, intercooler, wet-type electric precipitator, electrical tar precipitator, and special service valves

Key words: fluidized bed, combustion, gasification, chemical looping, oxy-fuel, calcium looping Introduction The development of fluidized bed conversion (FBC) during the last hundred years is illustrated in fig. 1, where various lines of evolution are seen. Figure 1. Fluidized bed conversion history. The lines show the main paths of development

haiqi CFB Boiler (formerly CYMIC) is an haiqi circulating fluidized bed (CFB) boiler developed by haiqi. It combines high-efficiency combustion of various solid fuels with low emissions, even when burning fuels with completely different calorific values at the same time. The wide size range covers boilers from 30 to 1200 MWth.

The aluminum hydroxide obtained is processed mainly by calcination in rotating tube furnaces or in, energy-saving (VAW-haiqi process), fluidized bed furnaces at 1200 to 1300°C to aluminum oxide (a-Al203). A small quantity of the aluminum hydroxide is carefully dried and used as such.

circulating fluidized beds which can be used for a broad variety of biomass inputs have been gradually accepted by the Chinese market. Furthermore, the cost of fluidized beds is also its strength compared with other combustion technologies for biomass fuels. In recent years, some biomass CFB boilers have been put into