Distilled water machine (double tube plate)

Working principle of LDS multi effect distilled water machine

Qualified raw water is pressurized by multi-stage pumps and enters the condenser for heat exchange. It then sequentially enters the preheaters of each effect, and then enters the first effect evaporator where it is sprayed onto the inner wall of the heating tube through the material water distributor, causing the material water to flow in a film like manner inside the tube and be heated and vaporized by steam from the boiler. The secondary steam carrying water droplets generated enters the steam water separation device from the lower end of the heating tube, and the separated pure steam enters the next effect as heating steam. The raw water that has not been evaporated enters the next effect, and the above process is repeated. The pure steam generated by the final effect enters the condenser and converges with condensed water from all effects except for the first effect for cooling. After removing insoluble gases, it becomes injection water with a temperature of 92-99 ℃.

Adopting double tube plate: preventing cross contamination of multiple materials (double tube plate or single tube plate can be used according to customer requirements)
Raw material selection: SS316L is used for the parts and pipelines in contact with distilled water and secondary pure steam, while SS304 is used for the rest of the parts.
Reasonable sealing structure: The majority of the equipment adopts flange connection, evaporator and separation split structure, and PTFE sealing gasket to seal the whole machine and prevent leakage.
The three-stage separation method: falling film evaporation, gravity settling, and wire mesh foam removal.
Reasonable control of automatic discharge of qualified and unqualified distilled water: controlled by PLC using a two position three-way valve.
One effect liquid level control: avoids unqualified water output of the entire equipment.
Electrochemical polishing: high surface smoothness; Improve the corrosion resistance of stainless steel; Can polish positions that cannot be processed by mechanical polishing equipment, which is beneficial for multi effect distillation
The water quality of the water machine's effluent is very important.
Energy saving: Due to the use of thin-walled heat exchange tubes and advanced material water distributors, as well as the use of injection water generated by each evaporator as the heating source for the preheater, the entire system
The heat exchange rate of the device has increased by 20%. The 5-effect machine does not require cooling water in northern regions, while in southern regions, it uses a small amount of cooling water. The 6-effect machine does not require cooling water.
Long service life: Due to the use of large space and low-speed separation, it avoids steam friction and corrosion. Greatly extend the service life of the machine, work under the same conditions, S-shaped multi effect
The service life of the machine is extended by 5-6 years compared to the spiral plate multi effect machine.
Fully automatic welding with internal and external argon gas protection: welding pipelines and equipment cylinders to ensure welding quality.
Insulation layer: made of glass wool or composite silicate needle blanket, with an outer layer made of SS304 brushed board.
Control system: There are multiple control modes for users to choose from: manual, PLC instrument fully automatic, PLC touch screen, etc. The PLC instrument is fully automatic and can be displayed online
Temperature, conductivity, flow rate, pressure, etc. can be observed online through the PLC touch screen to monitor parameter changes (temperature, conductivity, flow rate, pressure, etc.) at any time
Understand the production status of the equipment. And can be equipped with paper or paperless recorders according to customer requirements.