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公开(公告)号：US10859257B2
公开(公告)日：2020-12-08
申请号：US16296577
申请日：2019-03-08
申请人： Bioleap, Inc.
摘要： Waste heat is extracted in two stages from the exhaust (20) of a biomass dryer (14) in a grain alcohol plant (10). A boiler circuit (56) provides a first steam at high pressure. A first energy recovery circuit (36) extracts heat from the exhaust via a non-contact heat exchanger (24) and provides a second, relatively lower pressure steam (78), thereby bypassing a portion of the boiler circuit. Working fluids in the boiler and first energy recovery circuits are maintained within boiler water quality specifications and are intermixed to allow the production of the second steam without a pressure reduction device. A second energy recovery circuit (44) extracts heat from the exhaust downstream of the first energy recovery circuit using a direct contact heat exchanger (38) and provides a non-boiler quality heated fluid (52), which may be a heated liquid or a third steam.
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公开(公告)号：US20210002594A1
公开(公告)日：2021-01-07
申请号：US16498701
申请日：2019-03-14
申请人： Bioleap, Inc.
摘要： Energy efficiency is improved in a grain alcohol production plant (60) by capturing heat energy that otherwise would be lost to the environment when stillage evaporator last effect vapors (22) are condensed to recycle their water content. The low temperature/pressure heat energy of these vapors is efficiently recovered and reused by placing the vapors in direct physical contact (301, 402) with a working fluid (38) to form heated working fluid (54, 66), then using the heated working fluid directly in a process of the plant. In an embodiment, cook water used for the plant fermentation process is preheated by direct contact with stillage evaporator overhead vapor via one or more direct contact heat exchangers (301, 401) and/or a thermocompressor (402).
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公开(公告)号：US10345043B2
公开(公告)日：2019-07-09
申请号：US15894961
申请日：2018-02-13
申请人： Bioleap, Inc.
摘要： A system and method for extracting waste heat from the exhaust (20) of a biomass dryer (14), such as in a grain alcohol plant (10). A boiler circuit (74) provides steam at a high pressure to a balance of the plant (64). A recovered energy circuit (76) extracts heat from the exhaust and provides steam (60) at an intermediate pressure, thereby eliminating the need for a pressure reducing valve in order to satisfy an intermediate pressure steam demand in the plant. Working fluids in the boiler and recovered energy circuits are intermixed in a boiler feed vessel (72).
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公开(公告)号：US10350511B1
公开(公告)日：2019-07-16
申请号：US15643594
申请日：2017-07-07
申请人： Bioleap, Inc.
摘要： An improvement which reduces the reflux requirement for a fractional distillation system of an alcohol production plant (40, 60, 70, 80). The improvement includes a mixing device (44) for combining a water/alcohol mixture having an enhanced alcohol content (50, 62, 72, 82) with the reflux liquid (16) in the absence of a vapor/liquid equilibrium interface to form a reflux mixture (56) for supply to the rectifier column (14). The mixture having an enhanced alcohol content may be sourced from a location along the rectifier-reflux vapor to liquid system flow path, or from another source.
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公开(公告)号：US10267511B2
公开(公告)日：2019-04-23
申请号：US15782220
申请日：2017-10-12
申请人： Bioleap, Inc.
摘要： Waste heat is extracted in two stages from the exhaust (20) of a biomass dryer (14) in a grain alcohol plant (10). A boiler circuit (56) provides high pressure steam to a balance of the plant (54). A first energy recovery circuit (36) extracts heat from the exhaust via a non-contact heat exchanger (24) and provides a first relatively lower pressure steam (78) to the balance of the plant, thereby bypassing a portion of the boiler circuit. Working fluids in the boiler and first energy recovery circuits are maintained within boiler water quality specifications and are intermixed to allow the production of the first relatively lower pressure steam without a pressure reduction device. A second energy recovery circuit (44) extracts heat from the exhaust downstream of the first energy recovery circuit using a direct contact heat exchanger (38) and provides a non-boiler quality heated fluid (52) to the balance of the plant.
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公开(公告)号：US09989310B2
公开(公告)日：2018-06-05
申请号：US15496413
申请日：2017-04-25
申请人： Bioleap, Inc.
CPC分类号： F26B23/004 , B01D47/00 , B01D53/265 , F26B25/005 , F26B25/007 , F26B2200/02 , Y02B30/52 , Y02P70/40 , Y02P70/405
摘要： Waste heat is extracted from the exhaust (20) of a biomass dryer (14) in a grain alcohol plant (10). A boiler circuit (74) provides high pressure steam to a balance of the plant (64). A recovered energy circuit (76) extracts heat from the exhaust via a dryer exhaust condensing economizer (24) and provides a steam mixture (60) to satisfy an intermediate pressure steam demand of the balance of the plant, thereby bypassing a portion of the boiler circuit. Working fluids in the boiler and recovered energy circuits are intermixed in a boiler feed vessel (72). Dryer exhaust condensate (30) may be used in an exhaust gas scrubber (22) upstream of the dryer exhaust condensing economizer to remove pollutants and to saturate (26) the exhaust gas for improved heat transfer. Heat transfer may be further improved by operating the dryer exhaust condensing economizer at an elevated pressure.
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