Drum-type potato starch extractor and water-saving starch extraction device

Abstract

The invention provides a drum-type potato starch extracter. The drum-type potato starch extracter comprises a feed hopper, a drum sieve, a driving mechanism for driving the drum sieve to rotate around the axis of the drum sieve, a starch extracting tank with a water outlet in the side surface, a supporting base and a first support, wherein the drum sieve consists of a cylindrical framework, a sieve mesh covering the outer surface of the cylindrical framework, and a spiral propelling strip arranged on the inner surface of the cylindrical framework; the starch extracting tank is installed on the first support; the drum sieve is installed in an inclined way; a feeding end of the drum sieve is lower than a discharging end thereof; the feeding end of the drum sieve and a section near the feeding end are immersed into water in the starch extracting tank; the discharging end of the drum sieve is positioned above the starch extracting tank; the driving mechanism is combined with one end of the drum sieve; the supporting base is combined with the other end of the drum sieve; under the action of the driving mechanism, the rotating direction of the drum sieve is opposite to the rotating direction of the spiral propelling strip arranged on the inner surface of the cylindrical framework. The invention further provides the water-saving starch extracting device with the drum-type potato starch extracter.

Description

technical field [0001] The invention belongs to the field of potato starch processing, in particular to a potato starch extractor and a water-saving potato starch extraction device containing the potato starch extractor. Background technique [0002] The starch industry is an important economic industry in my country. At present, the raw materials used to produce starch in my country mainly include potatoes, cereals and beans, among which the starch produced by food crops accounts for about 90%, and the starch produced by potato raw materials accounts for about 10%. In recent years, driven by domestic and foreign market demand, my country's potato starch processing industry has developed rapidly. With the rise of food prices, the proportion of starch produced from potato raw materials will become higher and higher. [0003] Taking sweet potato as an example, the potato area in the Yangtze River Basin is one of the main potato areas in my country, and starch processing is the...

AI Technical Summary

Problems solved by technology

Using the existing potato starch extraction equipment to extract starch mainly has the following problems: (1) the water consumption is large, because the material needs to be moved from the feed end to the discharge end of the screen due to the need for the flushing effect of water, which requires The water for flushing the material must have sufficient power, and these waters are all for one-time use, resulting in a large amount of water consumption. About 5 tons of water are needed to process each ton of sweet potato, that is, about 20 tons of water is needed to extract 1 ton of starch; (2 ) water pollution is serious. Due to the seasonality of potato harvest and the characteristics of intolerance to storage, potato starch processing is mainly carried out in the harvest season. In addition, the existing starch extraction equipment consumes a lot of water. A large number of outbreaks, the chemical oxygen demand (COD) of wastewater is as high as 5000mg / L, and the treatment is very difficult. Most of these wastewaters are directly discharged into natural water bodies without any treatment. The large consumption of oxygen by organic matter causes water hypoxia, which not only leads to The surrounding air quality is poor, and it has caused the death of fish and shrimp; (3) the cost of the separation process of starch and water phase is too high. Therefore, not only the starch content in the water phase is too low to make it difficult to settle, but also a large amount of starch-containing water phase will be produced. If the starch sedimentation tank is used for separation, the starch sedimentation tank will inevitably occupy an excessively large area. If centrifugal separation is used, Can cause energy consumption to be too high; (4) starch extraction rate is lower than 80%, has caused the waste of starch resource, and water consumption is big in addition, causes cost too high

Wastewater pollution from starch processing is the main problem at present, and it is the bottleneck restricting the further development of potato starch processing industry

Images