Here the customer was looking for a solution for pre-washing potatoes. Pre-washing of potatoes is necessary here before they go to a steam peeler. The existing washing line was replaced so that the customer could run a double capacity with a second steam peeler.
First the potatoes are brought into a de-stoner, by pushing water upwards the product passes through to the washer and the stones fall onto an output belt below. The washer washes the product and the drum rotates in 4 V-belts. The dwell time of the product is determined by a control screen at the front.
Below the washer is an outlet screw to remove the sand and dirty heavy particles; a spray valve at the bottom ensures this. The product then goes to the flotation unit where the floating parts are removed.
Next, the product goes to the flotation unit where the floating parts are removed. Salt is added to the water in order to remove the lighter/badder potatoes. These remain floating, the good ones sink and are brought to the top with an output screw.
At the end of the screw there is a spray pipe to rinse off the excess salt water, this water is drained off with a wedgewire that is mounted in the bottom of the screw.
Before the product is stored, it is first optically sorted to remove any rejects.
Next, the product passes over a felt dryer that dries the product. This is done by means of rolls covered with felt.
After optical sorting, the potatoes are stored in different bunkers.