Negative pressure plant leaching solution concentration system

Abstract

The invention discloses a negative pressure plant leaching solution concentration system. According to the system, a vacuum air pump is connected to a steam outlet pipe of a concentration tank and is connected with an air inlet pipe of each condenser; the condensers are connected in series; the lower end of each condenser is connected with a temporary solvent storage tank; the temporary solvent storage tank is connected to a solvent storage tank; a liquid heater is arranged on a liquid outlet pipe of the solvent storage tank; and an outlet pipe of the heater is connected to the lower end of a fractionating tower. When the vacuum air pump on the steam outlet pipe of the concentration tank operates, the pressure in the concentration tank is reduced, so that a leaching solution is boiled to evaporate at a low temperature, the heating time is shortened, and the concentration efficiency is greatly improved. Moreover, because the temperature of evaporated vapor in a negative pressure state is lower than that under normal pressure, the cooling temperature difference on the condensers is relatively reduced in the process of condensing and recycling the evaporated vapor, and thus the energy consumed by the condensers is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of extraction equipment for plant effective components, and relates to a negative pressure concentration system for plant extracts. Background technique [0002] When the active ingredients of plants are extracted, the initial extract containing plant active ingredients after soaking and boiling in the extract should be concentrated in a concentration tank, and the extract is recovered to obtain a essence containing plant active ingredients. After processing, the desired plant active ingredients are obtained. [0003] In the traditional production method, the boiled initial extract is heated and boiled under normal pressure in the concentration tank, so that the extract is separated from the initial extract, and the extract containing plant active ingredients is left in the concentration tank. The extract vapor is condensed by the condenser and then recycled to the storage tank for use in the next extractio...

AI Technical Summary

Problems solved by technology

[0004] In the traditional production method of extracting active ingredients of plants, when the initial extract of plants is heated and concentrated under normal pressure, there are problems such as high boiling temperature of the initial extract, long heating time, high heat consumption, and low concentration efficiency. Provide A negative pressure concentration system for plant extracts. The concentration tank of the system is equipped with a steam heating pipe, and the steam outlet pipe of the extract is installed above the concentration tank. The steam outlet pipe is connected to the inlet pipe at the top of the condenser, and the condenser No less than two, the inlet pipe at the top of the condenser and the outlet pipe at the end are connected together to form a series connection. The lower end of each condenser has a liquid outlet pipe connected to the temporary solvent storage tank, which is connected to the solvent storage tank. On the tank, no less than two vacuum pumps are installed in parallel on the steam outlet pipe of the concentration tank. The exhaust pipes of the vacuum pumps are connected in parallel to the inlet pipe at the top of the first-stage condenser. A liquid heater is installed on the outlet pipe of the heater, and the outlet pipe of the heater is connected to the lower end of the fractionation tower. The fractionation tower is respectively equipped with a high-concentration solvent outlet pipe, a medium-concentration solvent outlet pipe and a low-concentration solvent outlet pipe

Images