Patents by Inventor Hartmut Hafemann

Hartmut Hafemann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11320199
    Abstract: The invention relates to an evaporation dryer (1) for drying particles, having—a process chamber (10) with at least one product inlet (11) for supplying the particles to be dried into the process chamber (10) and a product outlet (12) for discharging dried particles from the process chamber (10), —a heat exchanger (20) arranged within the process chamber (10), —having at least one inlet (21, 211) into the heat exchanger (20) for pressurized steam as process steam and at least one condensate outlet (22, 222) from the heat exchanger (20), wherein—the at least one condensate outlet (22, 222) is connected to an expansion tank (30), wherein at least one pump (40) is connected to the expansion tank (30), and the expanding steam is pumped out of the expansion tank (30) and supplied to the process steam.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: May 3, 2022
    Assignee: BMA BRAUNSCHWEIGISCHE MASCHINENBAUANSTALT AG
    Inventors: Gerald Caspers, Hartmut Hafemann
  • Publication number: 20200182544
    Abstract: The invention relates to an evaporation dryer (1) for drying particles, having—a process chamber (10) with at least one product inlet (11) for supplying the particles to be dried into the process chamber (10) and a product outlet (12) for discharging dried particles from the process chamber (10), —a heat exchanger (20) arranged within the process chamber (10), —having at least one inlet (21, 211) into the heat exchanger (20) for pressurized steam as process steam and at least one condensate outlet (22, 222) from the heat exchanger (20), wherein—the at least one condensate outlet (22, 222) is connected to an expansion tank (30), wherein at least one pump (40) is connected to the expansion tank (30), and the expanding steam is pumped out of the expansion tank (30) and supplied to the process steam.
    Type: Application
    Filed: May 14, 2018
    Publication date: June 11, 2020
    Inventors: Gerald CASPERS, Hartmut HAFEMANN
  • Patent number: 10330385
    Abstract: The present invention relates to a device for removing fluids and/or solid substances from a mixture of particle-shaped materials with a container which forms a ring-shaped process chamber with a plurality of cells separated from each other by walls, comprising an inlet cell, intermediate cells and an outlet cell, a feeding installation for conveying the mixture to be treated into the inlet cell of the process chamber, a discharge installation for discharging the mixture treated from the outlet cell of the process chamber, a ventilation installation for feeding in a first fluidisation agent, in particular in the form of overheated vapour, from below into the process chamber through an inflow floor for generating a fluidised bed in the process chamber, a heating installation for preparing the first fluidisation agent in the flow direction before the ventilation installation, swirl impellers for conditioning the flow in the container from the process chamber to the heating installation and which in part also le
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: June 25, 2019
    Assignee: BMA BRAUNSCHWEIGISCHE MASCHINENBAUANSTALT AG
    Inventors: Gerald Caspers, Hartmut Hafemann, Carsten Bonath, Holger Fersterra
  • Publication number: 20170045293
    Abstract: The present invention relates to a device for removing fluids and/or solid substances from a mixture of particle-shaped materials with a container which forms a ring-shaped process chamber with a plurality of cells separated from each other by walls, comprising an inlet cell, intermediate cells and an outlet cell, a feeding installation for conveying the mixture to be treated into the inlet cell of the process chamber, a discharge installation for discharging the mixture treated from the outlet cell of the process chamber, a ventilation installation for feeding in a first fluidisation agent, in particular in the form of overheated vapour, from below into the process chamber through an inflow floor for generating a fluidised bed in the process chamber, a heating installation for preparing the first fluidisation agent in the flow direction before the ventilation installation, swirl impellers for conditioning the flow in the container from the process chamber to the heating installation and which in part also le
    Type: Application
    Filed: March 9, 2015
    Publication date: February 16, 2017
    Applicant: BMA BRAUNSCHWEIGISCHE MASCHINENBAUANSTALT AG
    Inventors: Gerald Caspers, Hartmut Hafemann, Carsten Bonath, Holger Fersterra