What is an MVR evaporator and what are its features?

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The last edit to this post was made by Desert Fish on 2016-3-22 at 18:12. The MVR evaporator is a new type of efficient and energy-saving evaporation device primarily used in the pharmaceutical industry. It utilizes low-temperature and low-pressure steam generation technology as well as clean energy sources to produce steam, thereby separating water from the medium in question. It represents state-of-the-art evaporation technology worldwide and serves as an upgraded alternative to traditional evaporators. Features: 1. High thermal efficiency, energy savings, and low power consumption; 2. Low operating costs; 3. Uses clean energy with no pollution; 4. Thanks to the secondary steam reuse technology, the COD, BOD levels, and ammonia nitrogen content in the steam condensate are much lower than those of traditional multi-effect evaporators; 5. It employs single-stage vacuum evaporation, resulting in low evaporation temperatures, which is particularly suitable for heat-sensitive materials as it prevents degradation of these materials; 6. It represents an upgrade over traditional multi-effect falling-film evaporators; 7. High degree of automation – the MVR evaporator uses industrial computers, PLC control systems, and frequency conversion technology to enable fully automatic operation without human intervention; 8. Small size and portable

MVR technology was originally invented in Japan, but it wasn’t widely adopted for a long time. However, it has seen rapid development in recent times and is used to a large extent for wastewater concentration. The reason for this is that there are many enterprises that discharge waste water in our country, and the costs associated with wastewater treatment are high. By using MVR to concentrate most of the water, only the remaining amount needs to be processed by wastewater treatment plants, which helps to save a significant amount of money on wastewater treatment costs. Nevertheless, it does require some electricity to operate. Simply put, electricity is used to replace steam in the evaporation of wastewater, thereby reducing the amount of waste water produced; electricity is cheap, while steam is expensive! It is said that only 0.5 yuan worth of electricity is needed to treat one ton of wastewater; if what they claim is achieved, it will save businesses on the costs associated with treatment ； But from a technical perspective, it doesn’t make sense – in our country, most of the electricity is still generated by boilers that produce steam, which is then used to drive turbines to generate electricity. How can electricity be cheaper than steam? :(:(:(

It might be better to clarify the data and the actual situation before speaking!

What I said earlier, that \"only 0.5 yuan of electricity cost is needed to treat one ton of wastewater,\" was incorrect; it should be that 50 yuan of electricity cost is required to treat one ton of wastewater

Doesn’t it still seem expensive?

The cost of treating one ton of wastewater is 300–600 yuan (the price depends on the chemical composition of the wastewater); compared to the 50 yuan required to concentrate one ton of wastewater, this represents a significant savings for enterprises

Mechanical Vapor Recompression, a mechanical vapor recompression evaporator; this technology originated in the United States in the 1980s.

50 yuan to treat one ton of wastewater? Isn’t this too expensive? The cost of domestic high-salinity zero-discharge technologies is currently generally between 20 and 30 yuan.

Transporting steam is not easy. It is either generated by burning natural gas oneself, or supplied by a thermal power plant; it’s much more difficult than obtaining electricity. MVR uses a fan to energize the secondary steam, thereby reducing the consumption of primary steam.