Fluid-bed drying system

Abstract

The invention discloses a fluid-bed drying system. The system comprises a main drying machine, a feeding device, a 1<#> heat exchanger, a 2<#> heat exchanger, a 3<#> heat exchanger, a 4<#> heat exchanger, a 1<#> scum skimmer, a 2<#> scum skimmer, a 1<#> cyclone separator, a 2<#> cyclone separator, a 1<#> bag dust collector, a 2<#> bag dust collector, a 1<#> water film deduster, a 2<#> water film deduster, a 1<#> gas liquid separator, a 2<#> gas liquid separator, a vibrating screen and a fluidized bed cooling device. Three air flows with different temperatures are input into different positionsof a bed body of the main drying machine, air outlet directions of air ports of a pore plate of the main drying machine are different, a middle bed is equipped with a variable cross-section air passage, thus increasing drying and staying time of materials in the main drying machine, the materials output from the main drying machine are cooled by desiccation and cooling air in the fluidized bed cooling device to further reduce moisture of finished product and discharge temperature of the finished product, thus realizing good drying and cooling effect.

Description

technical field [0001] The invention relates to a boiling drying system, which is especially suitable for drying heat-sensitive materials. Background technique [0002] Spices (scents) as food additives are heat-sensitive materials. The traditional drying production method adopts the static drying method of radiation heat transfer, that is, the wet material is placed in the baking tray, and then placed on the drying rack in the oven, heated at a low temperature in the oven, artificially stir-fried intermittently, and then cooled naturally after being out of the box After packing. The above drying methods have the disadvantages of ① uneven heating of wet materials, resulting in inconsistent water content of finished products; ② interval discharging, high energy consumption; ③ during the drying process, the operator can touch the materials, which is easy to cause cross flow of people; ④ the whole drying process The cycle is long. The Chinese application number is 88205253.5...

AI Technical Summary

Problems solved by technology

The boiling drying method can improve the defect of inconsistent water content in the finished product, but due to the technical characteristics of heat-sensitive materials that will melt, stick, and dehumidify when they are close to the dry base if they are continuously heated, and the moisture content of the spice (refined) product is required 0.005%, the heat-holding temperature of the finished product should not be higher than room temperature by 10° (room temperature is 25°), so the requirements for drying and cooling of heat-sensitive materials are relatively high, and not all boiling drying equipment is suitable for heat-sensitive materials. drying

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