公开(公告)号：US10793483B2

公开(公告)日：2020-10-06

申请号：US16054895

申请日：2018-08-03

Applicant: DariTech, Inc.

Inventor： David DeWaard ,  Josh McCort ,  Michael Klapper

IPC: C05F3/00 ,  C05F17/00 ,  C05F3/06 ,  C05C3/00 ,  B01D21/26 ,  B01D19/00 ,  B01D1/28 ,  B01D5/00 ,  C02F9/00 ,  C02F1/20 ,  C02F1/38 ,  A01C3/00 ,  C02F1/04 ,  C02F101/16 ,  C02F103/20 ,  C02F11/04

Abstract: A system and method for reclaiming nutrients from dairy manure includes a centrifuge for separating a liquid fraction of the manure from a solid fraction comprising organic material; a mechanical vapor recompression evaporator (“MVR”) to receive the liquid fraction from the centrifuge and evaporating the liquid fraction by mechanical vapor recompression to produce ammonia-laden water vapor and a concentrated nutrient slurry; a dryer for drying the nutrient slurry to a selected moisture content to be available as an ingredient in compounded fertilizer; and an ammonia stripping tower assembly to receive ammonia-laden water vapor from the MVR and from it to precipitate ammonium sulphate salt and condense water as separate products.

公开(公告)号：US20190119174A1

公开(公告)日：2019-04-25

申请号：US15792442

申请日：2017-10-24

Applicant: DariTech, Inc.

Inventor： David DeWaard ,  Josh McCort ,  Michael Klapper

IPC: C05C3/00 ,  C05F3/00 ,  C05F17/00 ,  C05F3/06 ,  C05F17/02

Abstract: To produce fertilizer, a system and method concentrates manure slurry in a mechanical vapor recompression evaporator (“MVR”) having a heat exchanger. The MVR receives the manure slurry within a first side to evaporate ammonia laden-water vapor from the slurry, leaving a nutrient concentrate. A compressor raises the evaporated ammonia-laden water vapor to a higher energy state. Within a second side of the heat exchanger, the compressed water vapor conveys heat to the slurry. Ammonia-laden water condenses in the second side at a process temperature to be conveyed to an ammonia stripping tower where the ammonia-laden water is dispersed into ammonia-laden water droplets. In the tower, a flow of air is directed across a surface of the ammonia-laden water droplets, the process temperature having been selected to promote the escape of ammonia gas from the ammonia-laden water droplets, the flow of air provided to entrain ammonia gas in the flow.

公开(公告)号：US20190119179A1

公开(公告)日：2019-04-25

申请号：US16055500

申请日：2018-08-06

Applicant: DariTech, Inc.

Inventor： David DeWaard ,  Josh McCort ,  Michael Klapper

IPC: C05F17/00 ,  A01C3/02 ,  C05F3/06 ,  C05F17/02

Abstract: To produce fertilizer, a system and method concentrates manure slurry in a mechanical vapor recompression evaporator (“MVR”) having a heat exchanger. The MVR receives the manure slurry within a first side to evaporate ammonia laden-water vapor from the slurry, leaving a nutrient concentrate. A compressor raises the evaporated ammonia-laden water vapor to a higher energy state. Within a second side of the heat exchanger, the compressed water vapor conveys heat to the slurry. Ammonia-laden water condenses in the second side at a process temperature to be conveyed to an ammonia stripping tower where the ammonia-laden water is dispersed into ammonia-laden water droplets. In the tower, a flow of air is directed across a surface of the ammonia-laden water droplets, the process temperature having been selected to promote the escape of ammonia gas from the ammonia-laden water droplets, the flow of air provided to entrain ammonia gas in the flow.

公开(公告)号：US20190119177A1

公开(公告)日：2019-04-25

申请号：US16054895

申请日：2018-08-03

Applicant: DariTech, Inc.

Inventor： David DeWaard ,  Josh McCort ,  Michael Klapper

IPC: C05F3/06 ,  C05C3/00 ,  B01D21/26 ,  B01D1/28 ,  B01D5/00 ,  C02F1/20 ,  B01D19/00

CPC classification number: C05F3/06 ,  A01C3/00 ,  B01D1/2881 ,  B01D1/289 ,  B01D5/006 ,  B01D19/0005 ,  B01D21/262 ,  C02F1/041 ,  C02F1/048 ,  C02F1/20 ,  C02F1/385 ,  C02F9/00 ,  C02F11/04 ,  C02F2101/16 ,  C02F2103/20 ,  C05C3/00 ,  C05F3/00

Abstract: A system and method for reclaiming nutrients from dairy manure includes a centrifuge for separating a liquid fraction of the manure from a solid fraction comprising organic material; a mechanical vapor recompression evaporator (“MVR”) to receive the liquid fraction from the centrifuge and evaporating the liquid fraction by mechanical vapor recompression to produce ammonia-laden water vapor and a concentrated nutrient slurry; a dryer for drying the nutrient slurry to a selected moisture content to be available as an ingredient in compounded fertilizer; and an ammonia stripping tower assembly to receive ammonia-laden water vapor from the MVR and from it to precipitate ammonium sulphate salt and condense water as separate products.

公开(公告)号：US10919815B2

公开(公告)日：2021-02-16

申请号：US16055500

申请日：2018-08-06

Applicant: DariTech, Inc.

Inventor： David DeWaard ,  Josh McCort ,  Michael Klapper

IPC: C05F17/10 ,  C05F3/06 ,  C05F17/40 ,  C05F17/971 ,  C05F3/00 ,  C05C3/00 ,  A01C3/02

Abstract: To produce fertilizer, a system and method concentrates manure slurry in a mechanical vapor recompression evaporator (“MVR”) having a heat exchanger. The MVR receives the manure slurry within a first side to evaporate ammonia laden-water vapor from the slurry, leaving a nutrient concentrate. A compressor raises the evaporated ammonia-laden water vapor to a higher energy state. Within a second side of the heat exchanger, the compressed water vapor conveys heat to the slurry. Ammonia-laden water condenses in the second side at a process temperature to be conveyed to an ammonia stripping tower where the ammonia-laden water is dispersed into ammonia-laden water droplets. In the tower, a flow of air is directed across a surface of the ammonia-laden water droplets, the process temperature having been selected to promote the escape of ammonia gas from the ammonia-laden water droplets, the flow of air provided to entrain ammonia gas in the flow.

公开(公告)号：US10683239B2

公开(公告)日：2020-06-16

申请号：US15792442

申请日：2017-10-24

Applicant: DariTech, Inc.

Inventor： David DeWaard ,  Josh McCort ,  Michael Klapper

IPC: C05F3/00 ,  C05C3/00 ,  C05F3/06 ,  C05F17/00 ,  C05F17/90 ,  B01D1/28 ,  C05F17/20 ,  C05F17/964

Abstract: To produce fertilizer, a system and method concentrates manure slurry in a mechanical vapor recompression evaporator (“MVR”) having a heat exchanger. The MVR receives the manure slurry within a first side to evaporate ammonia laden-water vapor from the slurry, leaving a nutrient concentrate. A compressor raises the evaporated ammonia-laden water vapor to a higher energy state. Within a second side of the heat exchanger, the compressed water vapor conveys heat to the slurry. Ammonia-laden water condenses in the second side at a process temperature to be conveyed to an ammonia stripping tower where the ammonia-laden water is dispersed into ammonia-laden water droplets. In the tower, a flow of air is directed across a surface of the ammonia-laden water droplets, the process temperature having been selected to promote the escape of ammonia gas from the ammonia-laden water droplets, the flow of air provided to entrain ammonia gas in the flow.