D a c b a cc b c e a cc b c d directly heated thermal vapor recompression mechanical. Instead of live steam, electric energy is used indi rectly to heat the plant. However, initial costs, system design and energy consumption remain challenging problems. Mechanical vapour recompressors mvr with the increased need of energy steam conservation the subject of mechanical vapor recompressor has picked up great pace over the last few years. Technology and applications evaporation technology using. Analysis of a mechanical vapor recompression wastewater. This indicates the significant cost of compression involved in the vapor recompression option. Pdf application of mechanical vapor recompression to acetone. Evaporators with thermal vapour recompression technology use a part of the vapours to heat the unit. Us6375803b1 us09462,821 us46282100a us6375803b1 us 6375803 b1 us6375803 b1 us 6375803b1 us 46282100 a us46282100 a us 46282100a us 6375803 b1 us6375803 b1 us 6375803b1 authority us. The design processes of the mvr wastewater distillation system are an important part in actual production or research. Vapor recompression relies upon a mechanical compressor or steam jet ejector to increase the temperature of the latent heat in steam to render it usable for process duties.
Started in 1977 we were based in continuous purification technologies. Pdf vapour recompression is a means of upgrading energy by the compressing of a lower pressure vapour up to a higher pressure, thus making the energy. Used extensively by the food, chemical, and pharmaceutical industries, the mechanical vapor recompression mvr process is viewed as a reliable method for recovering demineralized water from concentrated brines. The ejector is usually designed for specific working points and works on a jet pump principle. Since the pressure increase of the vapor also generates an increase in the condensation temperature, the same vapor can serve as the heating medium for its mother liquid or solution being concentrated, from which the. Andritz mvr evaporators are designed to operate with very low specific energy consumption while producing clean condensate to minimize fresh water consumption in the mill. Im investigating the possibility to take 1025tonshour of 25 psig steam and recompress it to 140psig.
Distillation still bottoms are then recycled with a mechanical vapor recompression evaporator into distilled water in our mechanical vapor recompression evaporator. Pdf advanced mechanical vaporcompression desalination. Advanced wastewater treatment technology mechanical vapor. We can design a system to match your existing process operating characteristics. Andritz mechanical vapor recompression mvr evaporator. Mechanical vapor recompression mvr is a proven energysaving evaporative technology, using lowvalue waste steam and heat. Mechanical vapor recompression mvr is an energy recovery process.
To this end, vapours are absorbed by an ejector and the vapours recompress up to a higher pressure. Our products are of high quality and intelligent design along with a high level of standardization. As a way to reduce energy consumption, a thermocompressor which uses high pressure steam as a motive fluid is added to a typical steam heated evaporator. Dedert originally introduced mechanical vapor recompression to the corn wet milling industry over 4 decades ago. Mechanical vapor recompression and membrane polishing. Vapor from an evaporator is compressed with a positivedisplacement, centrifugal or axialflow compressor to a higher pressure so that it can be. Everest is the only company in india to offer mvr blowers with a successful track record of over 10 years. Use vapor recompression to recover lowpressure waste. China mechanical vapor recompression technology mvr. Evaporator with large surface up to even 6000 m, dt heating to process side 45 k, tube length up to 26 ms, high efficiency in heat recovery between inlet and outlet liquors, evaporator with multiple liquid passes. Mechanical vapour recompression mvr is an open heat pump system in which the pressure and temperature of the vapour, together with the. Process wastewater is fed by the feed pump through the feedstock heat. Mvc units have been evolved to become a mature technology over past decades. Us6375803b1 mechanical vapor recompression separation.
Process description mechanical vapor compression distillation of saline water is a process in which mechanical energy is used as the main driving force. Mechanical vapor recompression mvr evaporation process. The mechanical vapor compression mvc distillation is inherently the most thermodynamically efficient process of singlepurpose thermal desalination plants. Vapor recompression relies upon a mechanical compressor or steam jet ejector to increase the temperature of the latent heat in steam to render it usable for. The process followed in this equipment is called an energy recovery process, as it condenses energy from a lowpressure vapor by the way of compression. Its high efficiency is due to the use of a rotary blower or steam compressor, which increases its latent heat by the. Flow diagram of singleeffect vapor compression distillation system. Simultaneously, other plant operations may require intermediatepressure steam at 20 to 50 pounds per square inch gauge psig. And while every flight of a space shuttle is celebrated as global media spectacle, the excellent work and. Snowpure is a us technology company headquartered in california. The observed order is vapor recompression base case thermal coupling.
Pdf mechanical vapour recompression incorporated to the. It works by reusing the heat energy contained in the vapor. The motive steam at approximately 150 psig enters the thermocompressor and expands as it passes through a diffuser. Mechanical vapor recompression blower and compressor.
The thermodynamic efficiency is derived from the application of the heat pump principle by a large volumetric flow compressor acting as the heat pump, which continuously recycles and keeps. The mechanical vapor compression mvc is among the most efficient distillation processes. Mechanical energy supplied via a compressor or fan compresses evaporated process vapor to a higher pressure and. Mechanical vapour recompression reduces the energy costs and the co2 foot print and.
If electricity is cheaper than steam generation, we recommend vapour recompression with electrical energy. Mechanical vapor recompression for the treatment of shale. The most basic and most key component of a unit of the mvr evaporator, mvr compressor refers to the machine which is used for the compressing the vapor. Compression raises the pressure and saturation temperature of the vapor. During the mechanical vapour recompression, vapours are recompressed to a higher pressure. Actual application of mechanical vapor recompression. In the transient case the temperature at node 9 is reduced from 30. Mechanical vapor recompression mvr, applied to ethanol distillation systems, recaptures energy that is typically lost to cooling towers. The thermodynamic efficiency is derived from the application of the heat pump principle by a large volumetric flow compressor acting as the heat pump. Mechanical vapour recompression reduces the energy costs and the.
An early report by matz and fisher 4 in 1981 showed that either the ro or mvc. Mechanical vapor recompression evaporation mvre has been used in the manufacturing industry for decades for such purposes as desalinating sea water, concentrating juices and treating wastewater on large industrial scales. Mechanical vapor recompression evaporators products. The mechanical vapor compression mvc desalination system is based on distillation of seawater. Abstractthis paper proposed a novel integrated design of azeotropic mixtures distillation process based on mechanical vapor recompression mvr. The vapor generated at state point 4 enters the compressor at state point a where it is compressed to state point b and then enters the condensation side of the evaporator where it condenses on the other side of the heat transfer surface a at state point 7 and is. The annual operating cost which entails utility including electricity and raw materials for the three options are shown in table 2. Ecovap mvr is a mechanical vapour recompression technology where the vapour is compressed in a compressor or fan to a higher temperature and pressure. The heat required to evaporate water which flows on one side of a heat transfer surface is supplied through the simultaneous condensation of the distillateproducing vapor on. It looks nice in theory but i wondered if anyone had experience with installation and operation of such equipment. The extractive distillation of acetone methanol binary system that forms a homogeneous minimum boiling azeotrope was studied.
Mechanical vapor recompression mvr is an energy recovery process where energy is added to lowpressure vapor usually water vapor by compressing it. Devon energy has supported the operation of an advanced mvr system at a northcentral texas barnett shale region treatment facility. During that time, the technology has evolved somewhat, specifically in europe where water and energy conservation are more. The system is basically a heat exchanger that is an evaporatorcondenser.
Mechanical vapour recompression mvr can improve energy efficiency in process plants. As energy costs increase, the use of mechanical vapor recompression mvr evaporators has also increased. Global mechanical vapor recompression mvr compressor market is anticipated to rise at a higher cagr. In the design process, the parameters such as evaporation rate m d, concentration of the feed x f, and the designed outlet temperature or concentration of the condensate water and distillate are all given. Typically, the compressed vapor can be used to heat the mother liquor to. Piller mvr blowers ensure maximum efficiency, thus cost savings, and lower life cycle costs. Mechanical vapor recompression mvr compressor market. The encon mechanical vapor recompression mvr evaporation process involves our forced circulation flash evaporator utilizing mechanical vapor compression. Use vapor recompression to recover lowpressure waste steam lowpressure steam exhaust from industrial operations such as evaporators or cookers is usually vented to the atmosphere or condensed in a cooling tower.
By using this design, the encon mvc evaporator allows for minimal scaling, maximum uptime, and low operating costs. Recompression typically requires only 5% to 10% of the energy required to raise an equivalent amount of steam in a boiler. Mechanical vapour recompressors mvr everestblowers. Increasing energy costs have justified the increased use of mechanical recompression evaporators. The saturated steam temperature corresponding to the heating chamber pressure is higher so that the vapor can. The use of a thermal vapor recompressor tvr gives the same steamenergy saving as an additional evaporation effect. Closedprocess evaporation in this process, the steam, collected by a vapour compressor, is heated to a higher energy level and is then returned to the process as fresh heating steam. Pdf this paper proposed a novel integrated design of azeotropic mixtures distillation process based on mechanical vapor recompression. Mechanical vapor recompression mvr buy from mechanical vapor recompression mvr for your industrial processes, like distillation and evaporation. Technology and applications evaporation technology using mechanical vapour recompression engineering for a better world. Coating etching, distillation, liquid recycling, plastics processing, semiconductor. Mechanical vapor recompression device compared to similar threeeffect evaporation unit, the annual running cost savings of 1.
In the course of their development, the aim of efficiently using this. I read some articles on steam compression to upgrade quality pressuretemperaturewith dollar savings calculations. Technology and applications gea engineering for a better. A mechanical vapor recompression vacuum evaporator is designed for the efficient treatment of industrial waste effluent from production processes and water treatment plant reject fractions brine with a low energy cost. Aquaswiss mechanical vapor compression mvc distillation is the most thermodynamically efficient process of singlepurpose thermal desalination. The result is a smaller volume of vapor at a higher temperature and pressure, which can be used to do useful work. Pharmaceutical vapor compression distillation vcd, improperly known as thermocompression or such as mechanical vapor recompression mvr or mechanical vapor compression mvc distillation, too, is the main way to produce wfi water for injection and grade waters for pharmaceutical use. Mechanical vapor recompression device mvr does not use the boiler, use of electricity clean energy, 3t h evaporation plant, power consumption 105kw 1 20 300 630000 rmb year. Analysis of a mechanical vapor compression desalination. Mechanical vapor recompression was initially used almost exclusively in the dairy industry. Based on the simulation result, the total energy consumption of the proposed sequence is 62% less than the existing extractive distillation configuration. This effectively reduces steam con sumption in proportion to the number ofeffects. In the following years, its areas of application were expanded, and now include the dairy industry, brewing industry, sugar industry, saline industry, pulp industry, chemical industry, alcohol industry etc.
A new mechanical vapor recompression desalination system operating at high temperatures has been developed in united states lara et al. Snowpurestarted the worlds first edi technology research and development, and our edi technology products now have nearly 40 years of development. Vapor recompression equipment and technology, combined with many of the worlds leading advanced technologies. Mechanical vapor recompression evaporators swenson. Mechanical vapor recompression evaporators mvr evaporators get latest price. Mechanical vapor recompression mvr plants typical mvr evaporators with fan type recompressor 2features. Comparison of vapor recompression and thermal coupling. Thermocompression uses high pressure steam through a. Application of mechanical vapor recompression to acetone. The industry best practice is to conduct a pinch analysis on the steam system to reveal costeffective alternatives and optimize steam use by eliminating. Evaporation technology tvr heated evaporation plants. Mechanical vapor recompression separation process download pdf info publication number us6375803b1. Mechanical vapor compression reduces the energy used in the evaporation process by up to 90% compared with conventional systems.
Use vapor recompression to recover lowpressure waste steam. Steam recompression posted in industrial professionals. Your distillation system will operate as it currently does, but the steam generated by the boiler will be drastically reduced. It achieves its high efficiency in a simple manner, producing a high. Vapor compression evaporation is the evaporation method by which a blower, compressor or jet ejector is used to compress, and thus, increase the pressure of the vapor produced. These evaporator components are similar to steam driven systems, but with the addition of a mechanical compressor. Mechanical vapor recompression evaporation products. During thermal vapor recompression, vapor from a boiling chamber is recompressed to the higher pressure of a heating. Flownex network of the vapour compression refrigeration system. We tailor our mvr blowers to suit the individual customers needs. The energy savings possible by using mvr technology is significant.