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Economic evaluation of auto shredder residue pyrolysis plant design using process simulation software

机译：利用工艺模拟软件对汽车粉碎机渣油热解装置设计进行经济评价

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ASPEN PLUS, a well-known process simulator, has been used to simulate seven pyrolysis processes. The feed is assumed to be Automobile Shredder Residue (ASR), a waste material concentrated in mixed plastics (discussed briefly below). Each process uses either a rotary kiln reactor or a fluidized-bed reactor to produce gas, char, and liquids by pyrolyzing ASR. Six of the reactor types are well known; the seventh (DRKA) is fictitious. The processes are as follows: (1) Rotary Kiln (RK) - Solids are pyrolyzed in a conventional calciner or rotary kiln in indirect service. In this case, light pyrolysis gas and liquid are used as fuel, producing pyrolysis heat, which is conducted through the kiln shell to heat the incoming solids. (2) Rotary Kiln with char combustion (RKC) - Solids are pyrolyzed in a conventional indirectly heated rotary kiln, which has added equipment for solids combustion; char from pyrolysis is used as fuel producing pyrolysis heat. (3) Double Fluidized Bed (DFB) - Solids are pyrolyzed in a sand bed fluidized by recycled light product gas; pyrolysis heat is provided somewhat directly by burning char, liquids, and gas in a second combustion bed of sand fluidized by air. (4) Double Fluidized Bed with steam (DFBS) - Solids are pyrolyzed in a sand bed fluidized by steam; pyrolysis heat is provided by burning char, liquids, and gases in a second combustion bed of sand fluidized by air. (5) Fluidized Bed (FB) - Solids are pyrolyzed in a single fluidized bed of ASR and sand, the fluidizing medium is recycled light product gas. (6) Fluidized Bed with steam (FBS) - Solids are pyrolyzed in a single fluidized bed of ASR and sand; the fluidizing medium is superheated steam. (7) Nonseparatory Double Rotary Kiln (DRKA) - Solids are pyrolyzed in the inner chamber of a double kiln much like an indirectly heated kiln, except in this case the solids are assumed to be combusted without the expense of external char handling.

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