Combined type countercurrent extraction pot for instant coffee at constant temperature

Abstract

The embodiment of the invention discloses a combined type countercurrent extraction pot for instant coffee at a constant temperature. An efficient combined type countercurrent extraction pot at a constant temperature is adopted, so that the extraction rate of effective components is high. Through the adoption of the combined type countercurrent extraction pot, the extraction rate of the effective components can be increased by 3-8%. Because the systematic intelligent control is adopted, the product quality is stable, and the defect that differences of products in different batches is overcome. The combined type countercurrent extraction pot is uniform in heating, constant in temperature and easy to control. Extraction of soluble fractions in coffee can be furthest guaranteed without causing waste of raw materials. Slagging off and charging are both controlled pneumatically, so that the time required for charging and slagging off is shortened, and human resources can be saved. One person can control a full group of countercurrent extraction pots for instant coffee at the constant temperature. An electron concentration instrument is adopted, so that the extraction state of the materials can be displayed visually, situations of the coffee materials, that the subsequent concentration time of evaporators is long and steam is consumed due to excessive extraction, are avoided furthest, and the waste of ground coffee due to inadequate extraction is also avoided.

Description

technical field [0001] The invention relates to the field of extraction tanks, in particular to a combined constant-temperature countercurrent extraction tank for instant coffee. Background technique [0002] Coffee is one of the three major beverages in the world. It is rich in protein, crude fiber, crude fat, caffeine, etc. It has a unique mellow taste and refreshing and exciting effects. Coffee is a symbol of the West. According to statistics, my country's coffee consumption is increasing at a rate of 20% year by year, and it is expected to become the world's major coffee consumer. Instant coffee is the mainstream of coffee at present. Instant coffee is convenient and economical. The main choice, but China’s coffee started late in terms of planting and processing, the comprehensive utilization rate of coffee is low, and it is even more backward in deep processing, especially in the extraction technology of instant coffee. At present, most of the equipment independently dev...

AI Technical Summary

Problems solved by technology

Coffee is a symbol of the West. According to statistics, my country's coffee consumption is increasing at a rate of 20% year by year, and it is expected to become the world's major coffee consumer. Instant coffee is the mainstream of coffee at present. Instant coffee is convenient and economical. The main choice, but China’s coffee started late in terms of planting and processing, the comprehensive utilization rate of coffee is low, and it is even more backward in deep processing, especially in the extraction technology of instant coffee. At present, most of the equipment independently developed in China is multi-functional Extraction tanks or assembled countercurrent extraction tanks, etc., cannot meet the scale due to factors such as low extraction rate, large difference in extraction temperature and pressure, large amount of labor, poor equipment controllability, long extraction time, large amount of extraction liquid, and large coffee waste. The needs of the extraction stage in the production of instant coffee

[0003] At present, the domestic instant coffee extraction production technology and equipment generally adopt the traditional extraction process, which mainly includes the following types: decoction extraction, circulating reflux extraction, percolation extraction, etc., all of which are leached in a closed unit. , the concentration of the leachate increases, the concentration of the material decreases (referring to the concentration of soluble substances in the material), the speed of the leaching rate slows down, and gradually reaches a certain equilibrium state, a single multi-functional extraction tank has a large capacity and a lot of materials, in order to ensure as much as possible Increasing the extraction rate requires an increase in pressure and a long contact time between the solvent and the material, because the solvent and the material are under high temperature and high pressure for a long time, which will easily cause the loss of coffee aroma, increase the bitterness and astringency of the coffee taste, and increase the amount of infusion, increasing the post-process ( evaporator) workload

The counter-current extraction tank group is usually composed of 2-3 counter-current extraction tanks, that is, the material is filled with the extraction tank and then the solvent is started, and the solution in the first tank is filled and directly enters the second tank as the material for the second tank Because the temperature of the solvent will be taken away by the wall of the extraction tank and the connecting pipe during the circulation process, the temperature will be lower after entering the second pass, and the pressure will not rise normally. In order to ensure the extraction rate, the solvent must be increased to cause the first pass. One can was overcooked under high temperature and high pressure for a long time, which brought out a lot of bitter ingredients, while the second can was extracted under low temperature and low pressure, which resulted in the inability to fully extract the soluble substances of coffee, wasting raw materials, etc.

These processes also have unavoidable defects: low extraction rate, large waste of coffee; long extraction time; large liquid output coefficient, and easy to cause solution blockage or incomplete filtration, increasing the burden of subsequent processing, high energy consumption; batch-to-batch variation Larger; belongs to intermittent operation, poor working conditions

[0004] Coffee deep processing and extraction equipment all adopt production equipment from western countries. There are few domestic self-developed equipment that can be actually used, and the price of imported equipment is high (generally 5-8 times that of domestic equipment), and maintenance is difficult and consumables are expensive. Maintenance requires foreign companies to send personnel to repair, which takes a long time and costs high, which is not conducive to continuous and large-scale production

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