Disclosed is a method for thermally drying pasty products, in particular wastewater sludge, and a belt dryer implementing such a method. The principle consists of partitioning the drying operations and using, for each of the successive operations, a different quality of air: (i) hot air for searing the sludge, (ii) low temperature air, then (iii) cold air for quenching the sludge before the extraction of same. Also proposed are loops of air supply circuits making it possible to optimize the energy consumption of the dryer by reusing energy produced within these circuits. Moreover, the loops make it possible to recover unavoidable low temperature energy or cheap energy, further optimising the consumption of the dryer.

Methods and systems for the thermo-vacuum drying and processing of objects such as clothes. A vacuum ejector driven by high-pressure steam is employed to evacuate evaporated moisture mixed with air from a dryer vessel producing an intensification of the drying process such as can significantly reduce the energy and time requirements for the drying process and increase water utilization.

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 hot air is provided with a first and a second section, through which the material is passed successively in a transport direction. It includes a fresh air supply device, an exhaust air recirculation device for removing exhaust air and recirculating it 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 as supply air 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 single pass, multiple stage, rotary drum heat exchange dryer (22) is provided for drying products such as distillers grains and includes a tubular shell (64) with a moist product inlet (66), an opposed dried product outlet (70), and an internal drying chamber (78). The chamber (78) includes a convection drying first stage (80), and conductive drying final curing stage (82) an intermediate stage (84); the intermediate stage (84) is subdivided into a plurality of contiguous drying zones (86-92). The zones (86-92) include individual flighting assemblies (164) which are of substantially the same density and heat transfer ratios.

An apparatus for drying bulk goods and a method are provided for continuously drying bulk goods. In particular, an apparatus and a method is provided for drying wood fibers.

The present invention relates to combined cooker and dryer apparatus to use for drying material, such as raw material for producing fish or meat meal. The device of the present invention provides a cooker and a dryer apparatus with disks and scrapers for heat exchange and evaporation of the water phase from any material.

An apparatus for drying loose wood material having a rotating drum dryer is provided with an inlet and an outlet for loose wood material and with an intake port and a discharge port for a first stream of heated air. A belt dryer is provided with an entry opening and an exit opening for loose wood material and at least one intake opening and at least one discharge opening for a second stream of heated air. The apparatus also includes a conveyance component for transferring the loose wood material, the component being interposed between the drum dryer and the belt dryer. The apparatus further includes a component for conveying the first stream in output from the discharge port toward the at least one intake opening and a conveyor belt which is permeable to air is interposed therebetween and is adapted to filter the second stream.

The invention relates to a drying system (T) according to FIG. 1 for drying goods to be dried (LTG), comprisinga drying tunnel (TT), a line (LAG) for exhaust gas (AG) containing (VOC) out of the drying tunnel (TT), a controlled fan (GBL) for further transporting the exhaust gas (AG) to a heat exchanger (WT), a heat exchanger (WT) for heating the exhaust gas (AG) using the clean gas (RG), an exhaust gas line (LAG) downstream of the heat exchanger (WT) for further transporting the exhaust gas (AGWT) to a burner (BR) in a combustion chamber (BK) of a thermal post-combustion system (TNV), a cold bypass (BP) which bypasses the heat exchanger (WT) and which can be regulated using an electronically controlled controller (R), a fuel line (LEG) for a fuel (EG) to the burner (BER), a clean gas line (LRG) for transporting the clean gas (RG) out of the combustion chamber (BK) to the heat exchanger (WT) in order to cool the exhaust gas (AG), a clean gas line (LRG) for conducting the clean gas (RG) from the heat exchanger (WT) to the heat consumers (WA), a heater (HZTT) for heating the drying zone (TT) by means of the heat consumers (WA), and a clean gas line (LRG) for conducting the clean gas (RGD) to a stack (K). The invention also relates to a drying method and a method for a thermodynamic regulation (TDR).