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1)erection,Ö±Á¢

2)vertical retort,Ö±Á¢Â¯

3)erect coal bin,Ö±Á¢Ãº²Ö

4)erect mast,Ö±Á¢¾®¼Ü

5)standpipe,´¹Ö±Á¢¹Ü

6)vertical vessel,Ö±Á¢É豸

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Using the relation between a matroid and its erections,especially the relation dealing with a special map f,this paper makes a concrete analysis of the concrete conditions for the erection of V¨¢mos matroid.

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The composition of town gas and properties given;analyzed was the new process for co-production of 50kt/a methane from excess town gas at the coal gas plant of Datong Coal Mines Group;by vertical retort and two-stage furnace for water-gas,coal gas produced,from which qualified methane can be produced by subsequent compression,conversion,de-carbonization,syntheses and distillation.

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The paper reports that based on one dimention space heat conduction theory of infinite flat plate, the mathematic model on heat transfer of vertical retort is established.

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Experimental study was conducted on flow characteristics of catalyst in a standpipe with f108 mm4 mm and height of 10 m.

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Strength calculation of lifting lug on vertical vessel;

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