Peanut Color Sorter

Peanuts, a relatively widely consumed nut, are an important raw material for edible oil.  There are many processed peanut snacks and sauces available for sale on the market. As a crop grown in large quantities, the quality of peanuts directly determines its price, so improve the quality of thepeanuts and rapid screening have become a major focus of the process.

Peanut will confront the problem of screening:

Peanuts in shell: yellowing of the shell, mould, small grains, cracks, broken, mud and stones and other impurities.

Peanut rice: sprouted, mouldy, dried out, broken skin, half-grained peanuts, impurities.

The traditional method of sorting is to employ a large number of manual sorters, which is not only inefficient but also a waste of time and increases labour costs.

The Sunrise peanut colour sorter uses a professional image acquisition and processing system to obtain high quality image processing technology with a minimum resolution of 0.1 square millimetres. It can quickly and accurately detect peanuts with spots and mould, remove them, pick out mouldy particles and prevent cross contamination. The machine and equipment are stable and can identify subtle colour changes to accurately screen out high quality peanuts and improve production efficiency. Let more peanut processing plants, peanut buyers to improve production efficiency, gain economic benefits.

The difficulty of Peanut separation

Peanuts in the growth, harvest, transport, storage process is very easy to infect Aspergillus flavus and Aspergillus parasiticus, its secondary metabolites - aflatoxin has strong toxicity and high carcinogenicity, teratogenicity. Toxicity is 10 times more than potassium cyanide. Therefore, the study of contaminated aflatoxin peanuts before processing sorting technology will effectively isolate the source of contamination and prevent the problems in peanut separation, which make the great significance of ensuring food safety.

Solution

Coated peanut is the main form of raw material used in the processing and utilisation of peanuts. In-line, non-destructive, grain-by-grain sorting of coated peanut rice before processing can effectively prevent aflatoxin from entering the product. At present, there are existing methods for the detection of aflatoxin in peanuts, such as thin-layer chromatography, high-performance liquid chromatography and immunochemical methods, all of which require the destruction of the integrity of the peanut rice. The conventional colour selection method is based only on the calibrated appearance or epidermal characteristics of the differences in comparative sorting, it often results in the appearance of qualified but exceeded the toxin limit of the individual missed pick. Similarly, individuals that do not exceed the toxin limit but have an abnormal appearance are often incorrectly selected.

The study found that under UV light irradiation, group B aflatoxins fluoresced blue and group G aflatoxins fluoresced yellow-green. Therefore, concerning the widely used technical idea of grain-by-grain colour sorting of granular materials, the visible light imaging in the colour sorting system is replaced by fluorescence imaging, and by repeated or continuous UV-fluorescence imaging of the coated peanut rice passing in front of the background plate in a rotating sliding state one by one and in sequence, the exclusive optical signal of the contaminated over-limited grain is obtained and converted into an actuating signal accordingly, so that the coated peanut rice with excessive aflatoxin can be peanut rice from the pre-processing material.

Color Sorter Parameter

5340 pixel Multi Colorful CCD Color Sorter
Machine information
Model.NO.	R1	R2	R3	R4	R5	R6	R7	R8	R10	R12
weight(kg)	210	350	600	780	880	1000	1150	1250	1400	1650
channels	64	128	192	256	320	384	448	512	640	768
ejectors	Jpan SMC	Jpan SMC	Jpan SMC	Jpan SMC	Jpan SMC	Jpan SMC	Jpan SMC	Jpan SMC	Jpan SMC	Jpan SMC
light source	FlexibleLED	FlexibleLED	FlexibleLED	FlexibleLED	FlexibleLED	FlexibleLED	FlexibleLED	FlexibleLED	FlexibleLED	FlexibleLED
pixel of camara	5340	5340	5340	5340	5340	5340	5340	5340	5340	5340
Capacity  (T/H)	0.5-3.0	1.0-4.0	2.0-6.0	3.0-8.0	5.0-10.0	6.0-12.0	9.0-17.0	11.0-20.0	12.0-22.0	13.0-25.0
Sorting accuracy	99.50%	99.50%	99.50%	99.50%	99.50%	99.50%	99.50%	99.50%	99.50%	99.50%
Sorting ratio	15:01	15:01	15:01	15:01	15:01	15:01	15:01	15:01	15:01	15:01
Power(KW)	1	1.4	1.8	2.2	2.6	3.2	3.5	4	5	6
Air pressure	≥0.6Mpa	≥0.6Mpa	≥0.6Mpa	≥0.6Mpa	≥0.6Mpa	≥0.6Mpa	≥0.6Mpa	≥0.6Mpa	≥0.6Mpa	≥0.6Mpa
Air consumption (L/Min)	400-800	600-1000	800-1600	1000-1800	1300-2200	1500-2800	1800-3600	2200-4000	2400-4500	2700-5000
Power supply (Voltage/HZ)	110-250V 50-60HZ	110-250V 50-60HZ	110-250V 50-60HZ	110-250V 50-60HZ	110-250V 50-60HZ	110-250V  50-60HZ	110-250V  50-60HZ	110-250V 50-60HZ	110-250V 50-60HZ	110-250V 50-60HZ
Package	wooden box	wooden box	wooden box	wooden box	wooden box	wooden box	wooden box	wooden box	wooden box	wooden box