K+F

Ejector based vapor re-compression distillation, high temperature heat pump

The operating principle of the high-temperature heat pump based, ejector-driven, water purification/vacuum distillation equipment is based on the recovery of the condensation (latent) heat of the evaporating steam (vapor re-compression). The main parts of the equipment: (1) water-driven ejector, (2) heat exchanger, (3) evaporation tank, (4) motive pump (5) operation fluid tank. By starting the pump, the ejector reaches its operation condition. The ejector creates vacuum at the suction end and atmospheric or higher than atmospheric pressure at the discharge end of it. The suction nozzle of the ejector is connected to the evaporator, creating a vacuum in it. As a re-sult of the vacuum in the evaporator, the water begins to boil, the formation of steam begins, which is sucked out by the ejector from the evaporator. The extracted steam meets and mixes with the motive fluid and condenses after being transferred to the atmospheric/super-atmospheric pressure area (operation liquid tank). The released condensation heat is transferred by the heat exchanger to the water in the evaporating tank, due to which the steam formation becomes more intense and the temperature starts to rise. The heart of the device is the high-performance liquid-driven ejector, which can simultaneously create a strong vacuum, extract a sufficient amount of steam and atmospheric pressure or more on the outlet side. The equipment can be used for cleaning sewage, raising the temperature of thermal waters (high temperature heat pump), producing drinking water from seawater, any other vacuum distillation task, concentration for food industry, in an energy-efficient way. The only energy introduced to the system is the electrical energy of the motive pump. Depending on the design of the equipment, 20-75kW of electrical energy is required to produce 1m3 of distilled water. The efficiency of the equipment largely depends on the design of the evaporator and the efficiency of the motive pump.