Solvent classification recovery apparatus and solvent classification recovery method

Abstract

A solvent classification recovery apparatus comprises a recovery system, a photo-thermal system converting solar energy into heat energy so as to provide a high-temperature heat-conducting medium for the recovery system, and a photovoltaic system converting solar energy into electric energy so as to supply power for the recovery system. On the one hand, the focusing photo-thermal system is utilized for converting solar energy into heat energy and providing heated high-temperature heat-conducting oil for the recovery system for performing heat exchange with a recovered liquid, and on the other hand, the photovoltaic system is utilized for converting solar energy into electric energy and providing for a vacuum pump for generating vacuum. By combining the high/medium-temperature photo-thermal system and the photovoltaic system, various solvents can be successively evaporated and form steams according to the boiling points, different kinds of solvent steams can be distinguished by monitoring the steam temperature, and thus organic solvents with different boiling points can be classified and recovered. According to the technical scheme, bidirectional utilization of solar energy heat and solar energy electricity is realized, and the apparatus and the method are applicable to both solvent recovery and separation of intermiscible liquids.

Description

technical field [0001] The invention belongs to the technical field of solvent recovery, and in particular relates to a solvent classification recovery device and a classification recovery method thereof. Background technique [0002] With the rapid development of global industry, a huge amount of organic solvents are consumed in the production process of various fields such as chemical, chemical, material and biological. The use of these solvents generates large amounts of waste liquids which are harmful to the environment. Therefore, recycling these solvents and recycling them is not only a basic requirement for environmental protection, but also an effective way to reduce costs and improve benefits. However, solvent recovery requires a lot of energy. As a ubiquitous renewable clean energy, solar energy can be converted into various forms of energy (thermal energy, electrical energy, chemical energy, etc.) for utilization. The effective combination of renewable clean en...

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Problems solved by technology

However, the utilization of solar energy by the device described in this invention is limited to the heat absorption of the trough collector

Although high-boiling point diesel is used as the heat transfer medium, the inevitable loss in the heat transfer process makes it difficult for the whole device to boil and vaporize the high-boiling point solvent

In addition, the efficiency of the atmospheric distillation technology used in this invention is far inferior to that of the vacuum distillation commonly used in industry today.

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