Energy-saving and clean production method for distilling rosin and process equipment

Abstract

The invention discloses an energy-saving and clean production method for distilling rosin. The energy-saving and clean production method is a technique for distilling the rosin employing CO2 and / or N2 as a circulating activated gas. In the production process of separating the rosin and turpentine by rosin distillation, CO2 and / or N2 are introduced as the activated gases, so that partial pressure of the component in the turpentine of the distillation system is reduced; desorption of the turpentine is promoted to easily distill the rosin; meanwhile, the activated gas also plays a rosin stirring role; interphase heat transfer an mass transfer of the distillation system are intensified; the distillation speed and the product quality are improved. The energy-saving and clean production method has the advantages that the circulating activated gas does not generate a phase change in the rosin distillation process; phase change heat when super-heated steam is used as the activated gas is saved; the energy consumption is reduced, so that the investment cost on equipment is reduced; the obtained product does not contain moisture; the rosin is free of a crystallization phenomenon; the technique is transparent and not turbid. The CO2 and / or the N2 are used in cycle, so that the distillation process is fully sealed operation, is free of three wastes, and is the energy-saving and clean production method.

Description

technical field [0001] The invention relates to the technical field of forestry product processing, in particular to a method for processing rosin. Background technique [0002] Rosin and turpentine can be obtained by melting, filtering, clarifying and distilling rosin. Rosin distillation is a key process in the entire rosin turpentine production process, which determines the energy consumption of rosin processing and the important indicators of rosin product quality - color, softening point and crystallization. The traditional production method of rosin distillation is the steam distillation process, which uses superheated steam with a pressure above 0.8MPa and a temperature above 320°C to distill rosin. In the distillation process, the water vapor used for indirect heating is called closed steam; the superheated steam that directly enters the distiller after decompression and directly contacts with rosin is called active gas, and the production of each ton of rosin consum...

AI Technical Summary

Problems solved by technology

Before entering the distiller, the circulating active gas is preheated to 200-400°C by indirect heating with a heating furnace, and it is only the result of a small test in the laboratory, and industrial production has not yet been realized.

Images