A moisture removal system having a crop drying enclosure for holding a crop product to be dried. A closed loop air circulation system is provided which includes a moisture removal enclosure for removing moisture from circulating air along with air ducting operatively connecting the moisture removal enclosure to the crop drying enclosure air inlet to form a closed loop moisture removal air system. A heat pump system, including a compressor, a first heat exchanger capable of operation as a condenser, along with two additional heat exchangers, each capable of operating as either a condenser or evaporator are positioned within the moisture removal enclosure, to remove excess moisture from the circulating air without the addition or extraction of heat from the ambient air temperature.

A moisture removal system having a crop drying enclosure for holding a crop product to be dried. A closed loop air circulation system is provided which includes a moisture removal enclosure for removing moisture from circulating air along with air ducting operatively connecting the moisture removal enclosure to the crop drying enclosure air inlet to form a closed loop moisture removal air system. A heat pump system, including a compressor, a first heat exchanger capable of operation as a condenser, along with two additional heat exchangers, each capable of operating as either a condenser or evaporator are positioned within the moisture removal enclosure, to remove excess moisture from the circulating air without the addition or extraction of heat from the ambient air temperature.

Spray drying method and systems are disclosed that include one or more single-use components. Single-use spray drying systems can include a drying chamber with an inner surface formed of a polymeric material. The single-use components can be pre-sterilized and sterile packaged to provide improved efficiencies and greater operational flexibility in spray drying systems.

Spray drying method and systems are disclosed that include one or more single-use components. Single-use spray drying systems can include a drying chamber with an inner surface formed of a polymeric material. The single-use components can be pre-sterilized and sterile packaged to provide improved efficiencies and greater operational flexibility in spray drying systems.

A continuous-flow dryer for drying a material by hot air is provided with a first and a second section, through which the material flows successively in a transport direction. It includes a fresh air supply device, an exhaust air recirculation device for removing exhaust air and for recirculating exhaust air as supply air, and a heat exchanger, through which fresh air and exhaust air are led, for transferring waste heat of the exhaust air into the fresh air. With the exhaust air recirculation device a first part of the exhaust air is removed from the first section and recirculated directly into the first section. Furthermore, a second part of the exhaust air is removed from the first section, led through the heat exchanger, and recirculated as supply air into the first section. The fresh air supply device supplies fresh air as supply air into the second section.

A continuous-flow dryer for drying a material by hot air is provided with a first and a second section, through which the material flows successively in a transport direction. It includes a fresh air supply device, an exhaust air recirculation device for removing exhaust air and for recirculating exhaust air as supply air, and a heat exchanger, through which fresh air and exhaust air are led, for transferring waste heat of the exhaust air into the fresh air. With the exhaust air recirculation device a first part of the exhaust air is removed from the first section and recirculated directly into the first section. Furthermore, a second part of the exhaust air is removed from the first section, led through the heat exchanger, and recirculated as supply air into the first section. The fresh air supply device supplies fresh air as supply air into the second section.

A continuous-flow dryer for drying a material by means of hot air is provided with a fresh air supply device for supplying fresh air as supply air, an exhaust air recirculation device for removing exhaust air and for recirculating exhaust air as supply air, and a heat exchanger, through which fresh air on the one hand and exhaust air on the other hand are led, for transferring waste heat of the exhaust air into the fresh air. According to the invention, the removed exhaust air is supplied at the bottom into the heat exchanger.

A continuous-flow dryer for drying a material by means of hot air is provided with a fresh air supply device for supplying fresh air as supply air, an exhaust air recirculation device for removing exhaust air and for recirculating exhaust air as supply air, and a heat exchanger, through which fresh air on the one hand and exhaust air on the other hand are led, for transferring waste heat of the exhaust air into the fresh air. According to the invention, the removed exhaust air is supplied at the bottom into the heat exchanger.

A drying system includes a drying chamber, a collecting apparatus, and an air feed apparatus. The drying chamber is configured to accommodate a material to be dried. The collecting apparatus is connected to a material outlet of the drying chamber. The air feed apparatus is connected to an air inlet of the drying chamber and is configured to feed air to the drying chamber. The air feed apparatus includes a first condensing mechanism, a first heating mechanism, and a first water content sensor, where along an air feed direction of the air feed apparatus, the first condensing mechanism is located upstream of the first heating mechanism; the first condensing mechanism is configured to reduce water content of gas entering the drying chamber; and the first heating mechanism is configured to heat the gas entering the drying chamber.

A drying system includes a drying chamber, a collecting apparatus, and an air feed apparatus. The drying chamber is configured to accommodate a material to be dried. The collecting apparatus is connected to a material outlet of the drying chamber. The air feed apparatus is connected to an air inlet of the drying chamber and is configured to feed air to the drying chamber. The air feed apparatus includes a first condensing mechanism, a first heating mechanism, and a first water content sensor, where along an air feed direction of the air feed apparatus, the first condensing mechanism is located upstream of the first heating mechanism; the first condensing mechanism is configured to reduce water content of gas entering the drying chamber; and the first heating mechanism is configured to heat the gas entering the drying chamber.