Mô tả công nghệ
Giới thiệu:
Feeding systems are installed in front of HC and LC pulpers as well as in front of drum pulpers. They are consists of minimal one conveyor, up to several conveyors if needed due to the lay out or raw material balance.
Andritz is not manufacturing feeding conveyors; they will be purchased from different sub-suppliers. Sometimes also the paper mills buy this equipment locally.
Mechanical description
There are three different types of conveyors on the market. The type of conveyor will be selected according to the requirements of the feeding material as well the type of pulper.
Chain feeding conveyors
Belt conveyors
Slat conveyors
Arrangement and installation
Basically there are two different installations. The above floor level design and the under floor design. The under floor design will be installed if loose waste paper will be processed. With such an installation it is easy to load the conveyor by truck. The above floor level design mainly used in virgin fiber applications, where wires must be removed from the bales
For virgin pulp there are several possibilities for the arrangement of the feeding conveyors. Solutions using only chain conveyors, a mixture between chain-, belt- and slat conveyor up to only using one slat conveyor for pulper feeding are possible. The lay out of such a system depends on the requirements and raw materials. For batch pulper installations the feeding conveyor can be installed on weighing cells to calculate the right amount of pulp. Another possibility is to count the number of bales.
Such a feeding system can come up to a very complex installation. Starting with automatic unit de-wiring and de-stacking machines, automatic bale de-wiring, bale turning and centering equipment, followed by storage- and feeding conveyors.
Waste paper installations are more complex if the feeding system is installed in front of a drum pulper. Here normally slat conveyors installed. If bales are used, a bale breaker can be installed before the feeding conveyor. For batch pulper installations the feeding conveyor is installed on weighing cells to calculate the right amount of waste paper feed into the pulper.
