Drying device and drying process for konjac powder production

Abstract

The invention discloses a drying device and drying process for konjac powder production. The drying device comprises a device shell internally provided with a conveying chain belt and a drying pipeline, an exhaust fan, a heating chamber, a sulfur dioxide generating furnace, a sucking pump, and a tail end sucking pump; the device shell comprises a front-end coating section, a middle sulfur fumigating section and a rear-end coating section; the heating chamber, the sulfur dioxide generating furnace and the sucking pump are communicated with the middle sulfur fumigating section through pipelines, and the tail end sucking pump is communicated with the rear-end coating section through a circulating pipeline; and color protection coating mechanisms are arranged in the front-end coating section and the rear-end coating section respectively, a height limiting mechanism is arranged between the color protection coating mechanism of the front-end coating section and a feeding port, and a sulfur dioxide detector is mounted in the middle sulfur fumigating section. According to the drying device and drying process for konjac powder production, three-section continuous drying is carried out on the konjac slices, the drying effect of the konjac slices is ensured, and the usage amount of sulfur dioxide is effectively reduced while enzymatic browning of the konjac slices is prevented by using a color protection method combining citric acid and sulfur dioxide.

Description

technical field [0001] The invention belongs to the technical field of konjac production equipment and production technology. More specifically, the invention relates to a drying device and a drying process for the production of konjac fine powder. Background technique [0002] Konjac fine powder, also known as konjac flour, konjac gum or konjac mannan, is a fine powder obtained from konjac roots after drying, peeling, slicing, drying, crushing, and sieving. The main components of konjac powder are mannan and glucose, which are white or cream to light brown powder, and can be used as gelling agent, thickener, emulsifier, stabilizer, and film-forming agent. Konjac fine powder can be dispersed in hot water or cold water with a pH value of 4.0-7.0 to form a high-viscosity solution, and heating or mechanical stirring can increase the solubility. If a moderate amount of alkali is added to the solution, it can form a thermally stable gel that melts even under intense heating. Ko...

AI Technical Summary

Problems solved by technology

Konjac fine powder needs to be dried during the production process, and the drying process is usually after konjac slices; due to the strong activity of polyphenol oxidase in konjac, it is easy to produce enzymatic and non-enzymatic browning during heat treatment, in order to inhibit The browning caused by konjac in the process of processing generally adopts the method of sulfur fumigation. Although this method can inhibit browning, it will bring some problems, that is, the content of sulfur dioxide in konjac exceeds the standard, and the content of sulfur dioxide in konjac slices is too high It will have a great impact on the quality of konjac powder. At present, in order to reduce the content of sulfur dioxide in konjac, it is usually artificial to mix the processed konjac powder with calcium oxide, so that the calcium oxide and konjac contain Sulfur dioxide reacts to reduce the content of sulfur dioxide in konjac. Although this method can remove sulfur dioxide in konjac to a certain extent, the sulfur removal effect is not good, and it cannot effectively reduce the content of sulfur dioxide in konjac powder. Can not make konjac essence The content of sulfur dioxide in the powder is within the range of food safety, the quality of konjac fine powder is low, and the manual method is time-consuming and laborious, the efficiency is not high and the mixing is uneven

Simultaneously, when introducing sulfur dioxide to the surface of konjac slices or konjac powder, the amount of sulfur dioxide feed is difficult to control. At present, the way of feeding a large amount of sulfur dioxide is used to carry out sulfur fumigation and drying, which further makes konjac slices or konjac powder Excessive sulfur content

Images