Type of gasifier
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This post was last edited by GSP on 2010-3-10 09:10. What are the different categories of existing gasifiers, what are their specific characteristics, and which type is most commonly used nowadays/?
This post was last edited by huchsh on 2010-3-7 at 14:38. The existing gasifier? I can’t understand it
Commonly used in China are fixed-bed gas generators; improved versions based on these are the fixed-bed pressurized gasification reactors； Advanced ones include GE, SHELL, LURGI, GSP, and the four-nozzle gasifier from East China University of Science and Technology, etc
Could you expand on it in detail? Thank you
1 Overview of Coal Gasification Technologies At present, there are mainly three types of coal gasification technologies, as follows: 1.1 Fixed-bed (mainly uses lump coal) 1.1.1 Atmospheric pressure fixed-bed (such as U.G.I furnaces, Entho furnaces)； 1.1.2 Pressurized fixed-bed (e.g., Ruhr process furnace). The main technical drawbacks of fixed-bed reactors are low carbon conversion rate, high energy consumption, and severe pollution. 1.2 Fluidized bed (mainly for burning coal) mainly includes technologies such as Winkler furnaces, U-Gas furnaces, and ash polymerization. The main technical drawbacks of fluidized beds are low carbon conversion rates, high energy consumption, and difficulty in operation. 1.3 Gas flow bed (mainly for burning pulverized coal) 1.3.1 Dry pulverized coal (e.g., Shell furnace, GSP furnace, shell furnace, HT-L furnace, two-stage furnace, etc.) ； 1.3.2 Water-coal slurry (e.g., Texaco furnace, multi-nozzle water-coal slurry, multi-component slurry, etc.). The main technical advantages of the fluidized bed are high carbon conversion rate, high gasification efficiency, and good environmental performance; however, it requires high investment and is suitable for use in large-scale coal chemical complexes.
There are also relatively detailed explanations in the Modern Coal Chemical Engineering Technology Manual.
This question is actually hard to answer; the simplest way is to find a basic book or a review or something, and you’ll understand it at a glance.
Basically, it falls into the categories mentioned above. The commonly used technique nowadays is the fluidized bed wet process, such as the GE technology (formerly Texaco technology).
Texaco’s technology is more mature, while Shell’s is not yet as mature
BGL Texaco Shell Lurgi 1# amai4457
Regarding the classification of those top users mentioned above, just do a search on the forum and you’ll find everything; it’s quite detailed