Energy-efficient fluidized bed for cooling plastic granulate.
For several years, JOEST has been working on the optimization of thermal treatment plants with regard to energy consumption.
The optimization of energy consumption is the main focus in thermal treatment. The JOEST Fluidized Bed Dryer is already equipped with an exhaust air heat exchanger to preheat the process air. In specific cases, the drying systems can be designed with exhaust air recirculation. In this case, the exhaust air is partially returned to the drying system after being cleaned by a filter or cyclone. This reduces the energy consumption by more than 40 %. Such measures were previously not available for the JOEST Fluidized Bed Cooler, as the warm exhaust air cannot be recycled in the cooling process itself.
For the customer VEKA Recycling, an energy-efficient concept for cooling plastic granulate has now been developed by additionally focusing on the upstream and downstream systems. VEKA also focuses on environmental considerations when it comes to purchasing new machinery. VEKA‘s environmental awareness is served through the new process water heating system.
Basically, the JOEST Fluidized Bed Cooler transfers thermal energy through convection, i.e. direct heat transfer, so that the heat transfer medium comes into direct contact with the product. Conveying within the cooler is done by micro-throwing movements, which are well-known in conveyors using vibration technology. The vibrations are set individually for the application and machine type by adjusting the amplitude, frequency and angle of attack.
The hot plastic granulate is transported to the fluidized bed by pneumatic conveying and releases its heat into the surrounding air. This is passed through an air/water heat exchanger and thus heats the process water. In the further course, the plastic granulate transfers the heat to the cooled air, which is then passed through the second heat exchanger, further heating the used water. This can then be used at approx. 55 to 60°C in other process steps that require hot water or used to heat factories and offices. The investment costs for a heat exchange system are often covered after just one year by corresponding energy savings elsewhere.
After the engineering is complete, the machines will be manufactured at JOEST and delivered to the customer in mid-2023.
MOGENSEN joins China’s food security project as an official supplier, supporting the nation’s plans to strengthen domestic grain production capabilities. The appointment by COFCO, China’s largest state-owned agricultural company, includes the deployment of multiple precision screening systems for processing rice, wheat and soybeans, among other grains. This long-term initiative is in line with China’s new food security law, which went into effect on June 1, 2024.
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My name is NOIRET Garance, I am 21 years old and I am a French student. As part of my engineering studies in 4th year in Energy Mechanics I had the opportunity to do my internship abroad at the company Joest in Germany.
In conventional exciters, the bearings are lubricated by oil mist. The gears inside the housing churn the oil into fine droplets, which are distributed within the gearbox. Only a portion of these droplets reaches the rolling bearings and provide the lubrication. Some housings have oil collection pockets on the inside. These are intended to guide the oil along the inner surfaces of the housing downwards into the bearings. However, the entry of oil into the bearings is random and the quantity is undetermined. To improve the entire lubrication, the JOEST Oil Management System has been developed.
2024 was a special year in many ways for our continuously growing JOEST group. To start, we completed the largest acquisition in our company‘s history at the turn of the year with the purchase of the MOGENSEN Group and its locations in Germany, Spain and Sweden.
