High temperature Winkler gasifier

Figure 9.5 Reh diagram with gasifier opera- e-line - entrainment line, f-line - fluidization tion points for South African coal (30 bar) and line, FBDB - fixed-bed dry bottom, HTW -varied ash content for the internal circulation high-temperature Winkler), gasifier (INCI) concept (BGL - British Gas/Lurgi,...

HTW [High-Temperature Winkler] A process for gasifying coal, using oxygen and steam in a fluidized bed. An improved version of the Winkler process, differing from it by being operated... 

Figure 3.5 Gasifier of the high temperature Winkler process for the conversion of solid wastes.15...

Figure 6.31 Several concept developments suggested to enhance hIgh-temperature Winkler (HTW) technology (a) Integrated HTW (IHTW) [151], (b) the power HTW (PHTW) [153], (c) Internal circulation gasifier (INCI) [154].

Table 6.18 Approach temperatures for high-temperature Winkler (HTW) gasifier Aspen Plus model.

Figure 7.4 Interplay of gasifier models and ternary gasification diagram (HTW - high-temperature Winkler, INCI - internal circulation gasifier) (with permission from Ref. [17]. Copyright 2013, Elsevier).

Figure 9.8 Tentative layout of a 500 MW internal circulation (INCI) gasifier for 30 bar SAf coal (HTW - high-temperature Winkler).

Figure 7.14 Ash content sensitivity of several syngas yield, advanced systems (HTW - high-parameters (a) cold gas efficiency, standard temperature Winkler, INCI - internal drcula-systems, (b) cold gas efficiency, advanced sys- tion gasifier), terns, (c) syngas yield, standard systems, (d)...

Combustion occurs over a larger range in the gasifier which is almost homogeneous in temperature at about 1,000°C. Because of the nature of the fluidised bed there is a relatively high level of unconverted carbon present in the ash. The ash and unconverted coal (char) exit the bottom of the vessel. This gasifier is represented by gasifiers of the Winkler type. 

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