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This post was last edited by Sabrina.hose on 2026-2-2 11:02. Principle of autothermal recycle distillation: Basis of traditional distillation principle: Under a certain pressure, the components of a mutually soluble liquid mixture have different boiling points or saturated vapor pressures, which causes the light components (those with lower boiling points or higher saturated vapor pressures) to vaporize. Through multiple cycles of partial liquid-phase vaporization and partial gas-phase condensation, the concentration of light components in the gas phase and heavy components in the liquid phase gradually increases, thereby achieving separation. For example, in a distillation column, when a mixture at a certain temperature and pressure enters the column, the light components gradually become more concentrated as they move upward in the distillation section. After leaving the top of the column, they are all condensed and sent to the reflux tank, with some serving as the product from the column top and the rest being returned to the column as reflux. The heavy components, on the other hand, become more concentrated as they move downward in the stripping section; some of them become the product from the bottom of the column, while the rest are heated in a reboiler and sent back into the column to provide an upward stream of vapor for the distillation process. Principle of self-heating reuse technology: Self-heating reuse distillation involves compressing the low-temperature steam at the top of the distillation column using a compressor, thereby increasing its temperature and pressure and raising its thermal value. Taking the self-heating recycling distillation of silicone monomers as an example, the vapor from the top of Tower 1 is pressurized and heated by a compressor before entering the evaporator to exchange heat with the liquid from the bottom of Tower 2. The compressed high-temperature, high-pressure steam is sent to a reboiler, where it exchanges heat with the liquid in the bottom of the tower. The steam releases its heat and condenses, transferring that heat to the material in the bottom of the tower, which causes some of the liquid there to vaporize, thereby providing the rising steam required for the distillation process. Part of the condensed liquid is drawn off as the overhead distillate, while another part is returned to the top of the tower as reflux to maintain the material balance and stable operation of the distillation process. The system maintains the energy balance of the distillation process solely through the compressor, achieving efficient recovery of the latent heat of vaporization of the vapor at the top of the tower using only a small amount of electrical power. Autogenous heat recovery distillation system: The basic structure of an autogenous heat recovery distillation system consists of a compressor package and a distillation tower. Its core function is to convert electrical energy into thermal energy, thereby increasing the enthalpy of the secondary steam. This steam with increased thermal energy is then fed into the evaporation chamber for heating, allowing for the reuse of the thermal energy contained in the secondary steam itself – thus eliminating the need for external fresh steam. The system’s temperature, pressure, and motor speed are controlled using PLCs, microcontrollers, configuration systems, etc., to maintain evaporation equilibrium. Prospects for technology application: China is the \"world’s factory\" and at the same time a country with high energy consumption. China’s energy consumption per 10,000 yuan of GDP is 2.4 times that of developed countries abroad. With the worsening environmental conditions and rising energy costs, the domestic market offers vast opportunities for products related to clean energy. China currently has 1 billion tons of evaporation equipment that needs improvement; if energy-saving compressor technologies are widely adopted, it would be possible to save 1 billion tons of standard coal per year and reduce carbon dioxide emissions by 270 million tons. Wuxi Qingcheng Equipment Technology Co., Ltd. Ethylene glycol energy-saving distillation system (display)