Continuously Working Blade Peeling Lines

As a leading enterprise in the field of mechanical peeling technology DORNOW has been working constantly on new developments. In this connection we have examined, during the last few years, many practicable designs of continuously working blade peeling lines. 

It is common to pre-peel the potatoes provided for blade peeling in carborundum roller peeling machines. We suggest to pre-peel the potatoes at 85 to 90 per cent in the well-proved DORNOW roller peeling machines in order to go on peeling them afterwards with blades (at a waste peel rate of 10 to 15 per cent). However, design and construction of the blade peeling plant must have certain features, if one wants to get, at a waste rate of 10 to 15 per cent, potatoes that have, if possible, a nearly completely blade-peeled appearance.
 

1.         One might think, for instance, of rotating blade drums (with "blade walls") in which the potatoes to be peeled are fed. We dismissed this constructional possibility because it cannot be guaranteed that the potatoes are accurately peeled. Uncontrolled and irregular peeling results in unnecessarily high waste rates. 

            Practical work has shown that the potatoes have to be left for a relatively long time in a drum-type blade peeling machine, with a waste peel rate of at least 30 per cent, in order that the blades reach every point of the potatoes pre-peeled by means of carborundum. Thus it becomes evident that the peeling process is irregular and uncontrolled which brings about a higher waste rate than necessary.  

2.         Special features of multi-blade disc peeling machines ("MMS" as a blade model): 

-           Arrangement of many small fast-rotating blade peeling discs on an horizontal surface.
-           A conveying device moves the potatoes over these rotating blade discs.
-           The filling of the machines is to be carried out continuously and adjustably.
-           The speed of both the blade peeling discs and the conveying device are adjustable.
-           The machines are available in three sizes. The capacities are, when feeding potatoes already pre-peeled with carborundum, between 600 and 1500 kg/h (depending on the size of machines).
-           The blade discs can be moved out of the machine by means of an assembly on wheels. They can be quickly mounted and dismantled.
-           The machines can peel without producing waste water by means of an additional equipment. 

3.    Capacities of the SBS-M-(Messer = blade) system (in kg/hr of finished products, approximate values): 

(When using potatoes neatly pre-peeled by means of carborundum from medium to big sorting sizes) 

        SBS-M-I:        500 - 600, with 1 x peeling unit 20 M-AT,
        SBS-M II:       700 - 800, with 2 x 20 M-AT,

 
        You can find an illustration of a SBS - II - peeling system in our prospectus 108, page 5, picture 16. 

o      The "step-by-step" blade peeling system may consist of one peeling unit or of two peeling units of the type "20 M-AT" 
Throughputs: as cited above in kg/hr of finished produce, when using potatoes relatively well pre-peeled by carborundum. 

o      The peeling can be carried out either totally dry or in atomised water. This way of processing does not necessarily produce waste water. The quantity of water produced by the process of atomising is very small and will "disappear" with the waste peel. 

o      The "step-by-step" blade peeling plant can easily be connected to a carborundum roller peeling system, i. e. to a pre-peeling system. 

o      The peeling units are constructed in a way that guarantees a smooth and uniform peeling. That is why there will not be much waste. The blade peeling units will normally account for 10 to 15 per cent of the total peeling capacity, while the pre-connected and separately working carborundum pre-peeler accounts for some 85 to 90 per cent. 

o      The construction is very sturdy and permits easy maintenance. Few spare parts required. Simple technology. The peeling elements can, if necessary, be exchanged in a short time. 

o      The plant includes a precisely working weighing and dosing device. This has to be purchased only once, even if further peeling units will be added later.  

Please read also the following papers: 

Q 19    "The fully automatic DORNOW step-by-step" blade peeling system SBS-M" 

Q 26     "The DORNOW roller peeling machines of the R-OW-series in industrial peeling plants and in the potato processing industry" 

Q 28     "Blade peeling in industrial potato peeling factories - necessity or luxury?" 

Q 72     "Micro fine-grain peeling, especially in potato processing plants" 

Q 92     "The DORNOW blade peeling technology - various options for planning the plant" 

Q 104    "Steam peeling - Mechanical peeling in small-scale, medium-sized and large-scale industrial enterprises - Where to apply which peeling methods?" 

Q 105    "The continuous 'multiple-blade-disc peeling machines (MSS)', series AM, BM and CM"

We offer:  Sophisticated peeling technology based on 40 years of experience!

This paper contains non-committal notes. We do not lay claim to completeness. Alterations reserved. 
Our order confirmation, accepted by our customers, is in effect upon delivery. The presentation of a new edition of this treatise will substitute for any previous versions. 
Copyright by DORNOW food technology GmbH, D-40549 Düsseldorf

DORNOW total on the Web:                www.dornow.de   /    www.dornow.com

Q34 E3

Dornow food technology GmbH, Willstätterstr. 12, D-40549 Düsseldorf - Germany, USt-Id.-Nr. DE119264470
Tel. ++49-211-527060, Mobile ++49-172-2614932, Fax ++49-211-596883, email office@dornow.de, Internet: www.dornow.de, 
Commerzbank AG, Konto-No. 1452333, BLZ 300 400 00, Managing Director Karl-Dietrich Dornow, Amtsgericht Düsseldorf, HRB 22597