Quiz with prizes: Comparison between domestic fixed-bed gasifiers and gasifiers such as BGL
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Prize-winning quiz: It seems that the only domestic fixed-bed gasification technology available at present is the solid slag discharge fixed-bed gasification technology developed by Yunnan Jiehua based on the BGL technology. According to their descriptions, solid slag discharge is even better than the liquid slag discharge method used in BGL. Could experts please explain what are the differences between domestic fixed-bed gasification technologies (both at atmospheric pressure and under pressure) and foreign technologies? Apart from the lack of experience and engineering track record?
This post was last edited by shanxg on 2009-10-13 at 22:00. Personal opinion: There are many new types of gasification furnaces available in China today, but they still aren’t truly distinct from the original furnace designs. So why is it necessary to promote these new gasification furnaces? I think it’s to avoid a huge franchise fee (patent fee); by making minor modifications to the original design, we can turn those modifications into our own patents. Why not take advantage of such minor improvements to achieve overall benefits?
Yunnan Jiehua’s fixed-bed gasifier was itself improved based on the BGL technology, and ADVANTIC Company, the owner of BGL, also holds a share of the intellectual property rights. However, according to the published data, it seems that this solid slag discharge technology is better than the original BGL technology. Yet the furnace used in the project in Inner Mongolia has not yet been put into operation, so the specifics are not yet clear. Does this mean that domestically produced furnaces are now completely ahead of foreign ones? ? ?
If I understand correctly, BGL should refer to a floating-bed system with liquid slag discharge, while Lurgi’s original furnace is a fixed-bed system with solid slag discharge.
BGL, like Luchi, is a fixed-bed reactor; the only difference is that liquid slag is used for discharge, and the particle size of the raw materials used is the same
The improved BGL technology developed in Yunnan, China, is called the “YM pressurized gasification” technology, and it has performed well since last year
Hello, if BGL is a fixed-bed system, isn’t the high-temperature combustion zone at its lower part similar to the combustion swirl zone in a blast furnace?
Yes, it seems that Liwenter does know quite a bit about blast furnaces; there are some similarities between the two
Hello, what supports the moving bed above the combustion zone? Has a molten zone been formed? There shouldn’t be any internal components, right?
Without internal components, at temperatures above 1500 degrees, it’s impossible to have any internal components; it should be similar to the iron-making process in blast furnaces.
It’s better to choose based on the product requirements; if syngas is needed, BGL is the better option. If it’s just city gas or SNG, Ruichi is the better choice – firstly, its operation is stable, and secondly, it can save a lot on patent fees. It’s a pity that BGL allowed the Germans to take the patents and sell them; after all, nowadays the Lurgi furnace is probably the most widely used in our country!