Device for evaporating and removing residual solvent in eucommia ulmoides shell in spiral conveying manner

Abstract

The invention discloses a device for evaporating and removing residual solvent in a eucommia ulmoides shell in a spiral conveying manner. The device for evaporating and removing the residual solvent in the eucommia ulmoides shell in the spiral conveying manner comprises a spiral conveyer with a heating interlayer, the spiral conveyer is connected with a steam pipe by virtue of a valve; the spiral conveyer is provided with a feeding valve and a discharging valve, the spiral conveyer is connected with a shell side of a shell-and-tube heat exchanger by virtue of a cyclone separator and is finally connected with a temporary storage tank; a water dividing valve, a solvent return valve and a vacuum breaker valve are arranged on the temporary storage tank; the pipe side of the shell-and-tube heat exchanger is connected with a cooling water inlet pipe and a cooling water outlet pipe. The device for evaporating and removing the residual solvent in the eucommia ulmoides shell in the spiral conveying manner adopts totally-enclosed spiral conveying and direct steam and indirect steam combined heating desolvation drying, equipment is simple and reliable, operating cost is low, and desolvation is thorough, the technical problem that leaching solvent consumption of the eucommia ulmoides shell is high is solved, and the device for evaporating and removing the residual solvent in the eucommia ulmoides shell in the spiral conveying manner is applicable to small-scale continuous processing; stirring blades are arranged on a spiral blade of a spiral conveyer, a spiral conveying stirring function can be enhanced, materials are prevented from being hardened, and evaporation removal of the solvent is facilitated.

Description

technical field [0001] The invention relates to a screw conveying device for evaporating residual solvent in Eucommia husk. Background technique [0002] Eucommia gum and natural rubber have the same chemical composition, but different molecular structures. Eucommia gum is trans-polyisoprene, while natural rubber is cis-polyisoprene. Due to the different vulcanization methods, the same Eucommia gum molecule can present both rubber state and different plastic state, so it has very important application value and is a new functional material with multiple uses. Eucommia gum exists in Eucommia ulmoides leaves, bark and fruit, among which the husk has the highest gum content, up to 20%-30%, and is an ideal raw material for extracting Eucommia gum. [0003] Eucommia gum is easily soluble in non-polar solvents such as petroleum ether. After extracting the gum in Eucommia husk with petroleum ether and other non-polar solvents, there will be a lot of solvent remaining, which needs ...

AI Technical Summary

Problems solved by technology

[0003] Eucommia gum is easily soluble in non-polar solvents such as petroleum ether. After extracting the gum in Eucommia husk with petroleum ether and other non-polar solvents, there will be a lot of solvent remaining, which needs to be evaporated to reduce solvent loss. and cost, but the leached fruit shell will precipitate a small amount of Eucommia gum during the evaporation process, and the precipitated trace amount of Eucommia gum will wrap the fruit shell very tightly, making it difficult to evaporate the solvent, and Eucommia gum is an emerging industry, and there are few references The mature experience and technology of Eucommia ulmoides husk can not be completely desolvated by ordinary evaporators. To achieve the complete desolvation of eucommia husks, a new solvent evaporator must be designed according to the characteristics of eucommia husks in order to reduce the solvent. loss and cost

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