1. 3. As shown in FIGS. There are other types of plate evaporators… 6. 2 and 3, apertures 15, 17, 18 and 20 are located adjacent the longitudinal side edges of elements 1 and 2 so that they are displaced from the longitudinal center lines on which the section in FIG. 1. Along the external heat transfer surface, however, the wetted perimeter is constant. There are other types of plate evaporators, which work with only climbing film. & Terms of Use. The mutual divergence between the two heat exchange surfaces in such a case can be achieved by pressing out the two plate surfaces more and more towards each other in the direction towards the inlet end of the plates. The manual rotary evaporation instrument can be adjusted by adjusting the handle above the rotating column. Heating medium fed through the inlet port 8 flows through apertures 15 and 15' in the plates 1 and 1' and the corresponding passages 17 provided with gaskets 16 in the spacer frames 2 into the heating medium passages H and then flows towards the outlet 9 through apertures 18 and 18' in the plates 1 and 1' and the corresponding passages 20 provided with the gaskets 19 in the spacer frames 2. The heat transfer coefficient of plate-type evaporator with special corrugated designs which producing high intensity turbulence has been improved greatly, comparing to shell-and-tube evaporator. buy plate type evaporator on sale manufacturers, find details about buy plate type evaporator manufacturers, supplier and wholesaler - GUPHE. 5. Save space and Save installation budget. In fact, a gradually increasing cross-section of the evaporator channel is thereby obtained, although the perimeter even increases in the flow direction. Water removal capacities range from 1,000 to 35,000 lbs/hr (454 to 15,876 kg/h) for the standard size plate. This allows for low required wetting rates and easy single pass design. In addition to the basic equipment in a direct expansion refrigeration circuit, i.e. The reason for this is that although the passage's cross-sectional area increases in the flow direction due to the downwardly diverging plates 1 and 11 (FIG. Thus, the two streams of heating medium enter passage H adjacent opposite side edges thereof. Advantages of plate type evaporators: 1. Also, if for a heat sensible product the problem is solved by recirculation, a lower product quality is obtained due to a long residence time. 9.12). Low liquid holding volume. It also allows for quick start and shut down with very little waste. A plate evaporator comprises several heat exchange plates arranged substantially vertically in spaced face-to-face relationship to define between the plates evaporation passages alternating with heating medium passages. There are three sizes of plates with water removal capacities ranging from 2,000 to … Plate evaporator, or plate type evaporator is widely used in light industry, chemical industry, metallurgy, food, pharmaceutical, paper, environmental protection and other industries due to their high efficiency and energy saving. Spacer frame 3 has gaskets 23 for sealing against adjacent plates 1 and 11 to define passage H. As previously mentioned, the width of each of the two heat exchange surfaces defining a passage E decreases in the flow direction to provide the passage with a perimeter which decreases in said direction. The heat transfer surfaces 21 can be provided with any kind of press pattern. At either end of the evaporator we install some dome shaped metal plates known as water boxes. In these evaporators, the circulation of liquid is done at an elevated rate through calandria. Evaporated product and generated secondary steam flow in the lower part of the evaporator towards the outlet 7 through apertures 12 and 12' in the plates 1 and 1' and corresponding passages 14 sealed by gaskets 13 in the spacer frames 3. Use Semi-welded gasketed plate heat exchangers as evaporators and condensers for refrigerations systems, when gaskets are not suitable for one of the process media. Here plate type heat exchangers are used for condenser and evaporator unit. In evaporators of the falling film type as well as the rising film type, liquid films are forced to move along essentially vertical heat transfer walls with the generated steam between the film surfaces in the evaporation passages. In other words, the outer boundary of passage E, as viewed in the flow direction, decreases progressively in length as the flow proceeds through it. Finned evaporator. The plate type was designed to improve the efficiency of the bare tube design. Our range of products include plate type evaporators. Particularly if pressed plates are used, the press pattern must be designed so that reasonable press matrix costs and a minimal number of press patterns or plate embodiments are obtained. For example, the plate pack can be surrounded by a cover for product steam, and the plates can be designed to allow free product discharge at the lower end of the plate pack. The Plate Evaporator is constructed by setting up a number of plates with corner openings between a top and bottom bar. Further, it is not necessary to feed or discharge all the flows through ports located inside the periphery of the plates. Semi-welded heat exchangers alternate welded channels and traditional gasketed channels and can also take a higher design pressure compared to fully gasketed plate heat exchangers. British Patent No. The present invention relates to an evaporator of the plate heat exchanger type comprising several heat exchanger plates essentially vertically arranged in spaced face-to-face relationship to define flow spaces between the plates for liquid to be evaporated and for heating medium. 5). The refrigerant leaving the bottom of the receiver is 100% liquid. The plates 1 and 1' are provided with heat transfer surfaces 21 exhibiting decreasing width in the flow direction of the falling film. Further, it is suggested to divide the flow passages for the feed liquid in an upwardly and downwardly diverging part and to force the liquid first to stream upwards in the upwardly diverging part of a plate interspace and then to stream downwards in the downwardly diverging part of another plate interspace. Machinery and Equipment buys and sells all types of Used Heat Exchangers including shell and tube, plate type, sprial, tube-in-tube, block type and more. 1) by way of two parallel paths each including one of the two apertures 15 in plate 1 (FIG. 2. Low investment. Swedish Patent No. The gasketed plate-and-frame evaporator (Figure 7) is constructed by mounting a number of embossed plates with corner openings between a top carrying bar and bottom guide bar. Therefore it is very economics to use plate-type evaporator and plate-type condenser, especially need to use the special metal such as SMO, Ti, Nickel and Nickel Alloy, and Hastelloy. Above: Brazed plate evaporator. Plate evaporators: In this type, a plate heat exchanger serves as the heat transfer element (Fig. 2) In a refrigeration system where load fluctuation is higher. Only difference is the type of heat exchangers used. As the original plate type evaporator, the Rising/Falling Film Plate system is a flexible, multi-duty unit engineered to handle small to medium production runs of heat sensitive products. 4. SUMMARY: Types of Maryland Specialty Plates. The main applications of following heat sensitive product. Brazed Plate or Shell & Tube Evaporators. Plate Evaporator is a type of evaporator in which a thin film of liquid is passed and flows between the plates for the process of evaporation. The evaporation passages E encompassed by two adjacent heat transfer surfaces are sealed from the surroundings by means of an annular gasket 22 in the spacer frames 2. Evaporation with falling film evaporators is a very efficient way of removing water from a liquid to obtain a higher concentrate of the solids. © 2004-2021 FreePatentsOnline.com. evaporator, compressor, condenser and expansion valve, the flooded system needs a receiver (no. View our online inventory today. Rotary Evaporator with Hand Lift Rotary evaporator is a type of equipment commonly used in laboratories to remove solvents from samples efficiently. The refrigerant from the receiver enters the evaporator (no. 403, 4th Floor, A Wing, Jay Ganesh Vision, Chinchwad, Pune - 411035, Maharashtra, India. Plate Evaporator is associated type of Semi-Welded Plate Heat Exchanger, rising film plate evaporators and are suitable when concentration and viscosity of fluid are high. The prototypical shell and tube heat exchanger has only one inner tube, and is typically used to teach engineering students the basic concept of a heat exchanger. Further, to facilitate cleaning of the evaporation surfaces and to avoid operational disturbences due to clogging of the evaporation channels, a simple channel design is required. 1, the path of the product to be evaporated and the evaporated product with generated steam is shown in full lines with arrows indicating the flow direction; and the path of the heating medium is shown in broken lines with arrows indicating the flow direction. 2,117,337, which relates to a tube evaporator, a circular evaporator channel is provided with an internal conical body for heating steam, whereby expanding evaporator channels and also decreasing wetted perimeter with respect to the internal heat transfer surface are obtained. 788,193 shows heat exchanger plates provided with horizontally extended corrugations and increasing evaporation channel cross-section in the flow direction is achieved by successively changing the angle of said corrugations in said direction. British Patent No. Not only covering less space, saving valuable space, but also reducing investment costs and maintenance without sacrificing reliability and security. 2. 3) and a corresponding aperture 151 in plate 11 (FIG. The distribution device introduces a pressure drop at the refrigerant inlet that ensures high flow turbulence and evenly distributed flow over the plate package. An increasing cross-sectional area and a decreasing perimeter of the evaporation passages are achieved by so arranging the two heat transfer surfaces of adjacent plates defining an evaporation passage that they diverge from each other in the flow direction of the medium to be evaporated and by decreasing the width of said heat transfer surfaces in said direction. It is an extension of the falling film evaporator, and has application in any field where the liquid to be evaporated cannot withstand extended exposure to high temperatures, such as the concentration of fruit juices. The evaporator is where the process water is cooled during the refrigerant-to-water heat exchanger portion of the chilling cycle. The invention will now be further described in connection with an embodiment of a plate evaporator of the falling film type and with reference to the accompanying drawing, in which FIG. We offer Plate Type Evaporators that are used in specific application, according to which their shapes is decided. Steam heat pumps need to be used in tube - shell evaporators, and the secondary steam ejection ratio is very low, only 1:0.5. Different types of evaporators are used in different types of refrigeration applications and accordingly they have different designs. Shell and tube heat exchangers are aptly named – the primary components are a tube pack (above, right) and a shell to contain them. No. Within this unit, boiling is averted via a hydrostatic head that is … The very low retention means that at any given time, there is almost no product left in the evaporator of the plate-type evaporator. This has the advantage that the entire length of the plates can be used for heat exchange. 1 is an exploded sectional view of evaporator elements of a plate pack, the section being taken along the longitudinal center lines of the respective elements, and FIGS. The function of the spacer frames may, of course, be included as an integrated part of the plate themselves, in which gasket grooves are pressed in a well known manner. Less scale and convenient maintenance. 1), the decrease in the passage's width, as shown at 22 in FIG. In an advantageous embodiment of the invention, the two plates of each adjacent pair defining an evaporation passages are spaced from each other by a frame configurated to maintain the two plates in diverging relationship in the flow direction through the passage. A negative point of this type of evaporator is that it is limited in its ability to treat viscous or solid-containing products. Brief Information. 328,662 filed 12/8/81, abandoned. Another suggestion is to use a larger number of plate interspaces for the downward flow than for the upward flow. 2), a corresponding one of the two apertures 17 in spacer frame 2 (FIG. One fluid goes through the tubes, and the second goes through the larger shell, surrounding the tubes. 219,561 discloses a special evaporator in which the two desired features of decreasing wetted perimeter and increasing cross-section of the evaporation passages are met in the form of channels between two conical plate elements with different cone angles. The Plate Evaporators are also known as the gasketed plate and frame evaporators. Many specialty license plates are available to Maryland vehicle owners, from personalized car tags to plates affiliated with organizations.If you're eligible, you can also get a military plate or classic car tag. Typical applications for Plate Evaportator are sugar refinery evaporation systems, sweeteners evaporation systems, bioethanol and caustic evaporation. With high efficiency (the total transfer coefficient is 2-4 times of the tube evaporator), compact structure, convenient disassembly and cleaning, low liquid holding capacity, short time of … A plate evaporator comprises several heat exchange plates arranged substantially vertically in spaced face-to-face relationship to define between the plates evaporation passages alternating with heating medium passages. Whereas, shell-and-tube evaporator can only carry on cross heat transfer, so that make the heated steam reduced. 3, is sufficient so that the perimeter of the passage at its lowermost part is shorter that its perimeter at its uppermost part. 859,876 discloses an evaporator in which the liquid to be evaporated is first forced upwards between one pair of plates and then downwards between another pair of plates. 6. It can be seen clearly from the below schematic diagram, it is a triple effect evaporation system device, and the plate-type evaporator and plate-type condenser can save installation charge and save space greatly compared with traditional devices. The short heat contact period resulting from single pass operation and low liquid holdup eliminates product deterioration even when highly heat sensitive liquids are involved. Of course, the inlet and outlet ports 8-9 for the heating medium as shown in FIG. As illustrated, the evaporator comprises a plate pack having a series of heat exchange plates 1 and 1' arranged between alternating spacer frames 2 and 3, thereby forming evaporation passages E alternating with passages H for a heating medium. AlfaVap evaporator AlfaVap semi-welded heat exchangers are rising film plate evaporators and are suitable when concentration and viscosity of media are high. application Ser. 1 is taken. Plate Type Fresh Water Generator. Plate evaporator can also be designed for once through operation with suitable design improvement which is not possible in any other type of evaporator. On energy saving, plate-type evaporator and condenser can carry on counter-current heat transfer evaporation, closing the temperature difference of two ends. The product flow fed to the evaporator flows in the different evaporator passages E through apertures 10 and 10' in the plates 1 and 1' and passages 11 in the spacer frames 3, which passages are sealed from the heating medium passages H by means of gaskets 11a. A plate evaporator made according to the invention is characterized mainly in that the two plates of each adjacent pair defining an evaporation passage have respective heat exchange surfaces which diverge from each other in the direction of flow through such passage, so that the passage has a cross-sectional area which increases in the flow direction, and the width of each of the two heat exchange surfaces decreases in the flow direction to provide the evaporation passage with a perimeter at a given cross-section through the evaporation passage which decreases in said direction. 165/166, 165/167, DAVIS HOXIE FAITHFULL & HAPGOOD (ARLINGTON, VA, US), Click for automatic bibliography This unit is manufactured by Alfa-Laval Company and Nirex heat exchangers. The plate-type evaporator is particularly effective in high concentration and high viscosity, and can operate in the temperature difference only 3- 5¿¿¿. Also, the spacer frame is preferably provided with gasket means to delineate the respective heat exchange surfaces with their decreasing widths mentioned above. The original plate type evaporator, the Rising/Falling Plate system is a flexible, multi- duty unit engineered to handle medium size production runs of heat sensitive products. Working principle of plate type fresh water generator is same as that of submerged tube type. Therefore, those apertures appear only in broken lines in FIG. The invention also includes such plate evaporators in which a pair of heat exchange plates are joined together by any sealing arrangement, such as welding, around the periphery of the plates to form closed spaces for product or heating medium. A negative point of this type of evaporator is that it is limited in its ability to treat viscous or solid-containing products. Home / Plate Evaporators / Plate Type Evaporator J150. & Terms of Use. 3) For multi evaporator system. ✓Thank youThanks for sharing your contact infoWe will get back shortly. The product can be introduced into said spaces or forced to stream outside said spaces by means of any feed distribution system. Privacy Policy It is one of the most popular feature of plate-type evaporator that you can just add or remove the plate group based on the current frame if you want to expand or reduce the capacity, and it is the major advantage compared to shell-and-tube evaporator which has the fixed capacity when installing. We will contact you soon for better understanding of your product requirement & specification, Office No. Compared with traditional shell-and-tube evaporator and condenser, using E & D plate-type evaporator and condenser bring unimaginable benefits. The juice flows over the surface of the plates as a boiling film. Applications of flooded type evaporator:-This type of evaporator is used for 1) Large installations, where refrigerating capacity is high. Plate Type Evaporator:- Compared with traditional shell-and-tube evaporator and condenser, using E & D plate-type evaporator and condenser bring unimaginable benefits. Industrial line is an extremely versatile range of heat exchangers for use in all types of industries. The above-described embodiment is selected to exemplify the invention in principle. One suggestion to achieve increased channel cross-section in this evaporator is to locate the last mentioned pair of plates at a larger distance from each other than the distance between the first mentioned pair of plates. Not only covering less space, saving valuable space, but also reducing investment costs and maintenance without sacrificing reliability and … Two styles of evaporators are commonly used in Advantage process liquid chillers. This application is a continuation-in-part of Here we have classified the evaporators based on their construction. You can see the the example above, there are two holes separated by a metal plate. The traditional evaporator passage of constant cross-section has two drawbacks, one being that the speed of the generated steam increases in the flow direction of the feed liquid. To be a realistic alternative from the economical point of view, an evaporator in which the two above-mentioned desired features are combined must not be too complicated to manufacture. Easy installation and maintenance. High efficiency. The other is that the perimeter wetted by the liquid is constant in said direction. The high intensity turbulence in the whole plate not only reduces the scale, but also make it easy for chemical cleaning efficiently. No. The unique design of plate-type evaporator and plate-type condenser have higher thermal efficiency compared to traditional shell-and-tube facilities, it means the required heat exchange area is greatly reduced. It is a big advantage to heat sensitive products if products stay when evaporating in a short time. Because the least temperature difference of first effect evaporation of shell-and-tube evaporator need to be maintained at 15¿¿¿, it means the temperature of the steam into the shell-and-tube evaporator need to be at higher level, and can only pump small amount of low temperature of secondary steam. Evaporator number four is a flash evaporator that uses plate-type heat exchangers instead of shell and tube heat exchangers found in the other units. The requirement of a gradually increasing cross-section of the evaporator passages has been realized and effected in prior devices of the plate type as well as the tube type. 1). Unlike single-stage evaporators, these evaporators can be composed of up to seven evaporator stages (effects). The pack also has end wall elements 4 and 5, the end wall 4 being provided with an inlet 6 in its upper part for the product to be evaporated, an outlet 7 in its lower part for the evaporated product and generated steam, and an inlet 8 and outlet 9 for the heating medium. Multiple-effect evaporators. These features result in thinning of the liquid film along the heating surfaces; and in case of a low feed flow, they lead to film disruption and dry boiling. 2, Figure 6.44) and evaporates due to the he… Similarly, two streams of the heating medium discharge from the lower part of passage H, adjacent opposite side edges thereof, into respective flow paths each including one of the two apertures 181 in plate 11, a corresponding one of the two apertures 20 in spacer frame 2 and a corresponding one of the two apertures 18 in plate 1. The plates are gasketed and arranged to form narrow flow passages when a series of plates are clamped together in the frame. Below: Shell & Tube evaporator. Alfa Laval AlfaVap rising film plate evaporator Part of a broad range of gasketed plate heat exchangers AlfaCond is a compact, plate surface vacuum condenser. Plate Evaporator , Find Complete Details about Plate Evaporator,Plate Evaporator,Plate Type Evaporator,Plate Ice Maker Evaporator from Refrigeration & Heat Exchange Parts Supplier or Manufacturer-Jiangmen City East-Alliance Thermal Equipment Co., Ltd. It will be understood that the parts 1, 1' and 2-5 are clamped together by conventional means (not shown) to form the plate pack. Small floor occupation, low building cost. Privacy Policy 1, Figure 6.44) to separate the twophase mixture after the expansion valve (no. Liquid refrigerant flows through a tube going through the plates. All rights reserved. 1 are located adjacent one side edge of wall 4 so as to serve a corresponding one of the two parallel flow paths, and a second set of these inlet and outlet ports (not shown) are located adjacent the opposite side edge of wall 4 to serve the other of the two parallel flow paths. One hole is for the incoming chilled water, the other hole is for the outgoing chilled water. Rotary vacuum evaporator is widely used in chemistry, biology and other fields. The evaporators can be classified in various ways depending on the construction of the evaporator, the method of feeding the refrigerant, the direction of circulation of the air around the evaporator, etc. For plate heat exchangers, several ways to achieve increasing cross-section of the flow passages have been suggested. Also known as plate heat exchangers, these are used to process liquors that are prone to crystallization or scaling. 2 and 3 are elevational views of a plate element and a spacer frame, respectively, shown in FIG. However, the desired reduction of the wetted perimeter in the flow direction is not obtained in this way. generation, Process of and apparatus for transferring heat, <- Previous Patent (Auxiliary power syst...). The plate type evaporator is made up of two plates—usually made of aluminum because it conducts heat well—that have been seamed together. Short material holding time. This type of plate evaporator is frequently applied in the dairy and fermentation industries since they have spatial flexibility. SWEP evaporators facilitate stable and efficient operation down to very low refrigerant flow rates and low superheat, due to our patented distribution systems. Product Description. In practice, this problem is often solved by overloading on the product side, which means maintaining an unnecessarily thick film along a larger part of the heating surfaces giving low heat transfer values and requiring long heating surfaces. Because of the less retention volume, it only needs few detergent compared with shell-and-tube evaporator. The finned evaporators are the bare tube type of evaporators covered with the fins. A climbing/falling film plate evaporator is a specialized type of evaporator in which a thin film of liquid is passed over a rising and falling plate to allow the evaporation process to occur. The flexible design of the plate-type evaporator means it is easier to inspect the surface of the thermal conduction, and it can be cleaned by mechanical method which is only removing the fasten bolts and loosening the pressing plate. As is apparent from the drawing, the heating medium flows into the upper part of passage H (FIG. In FIG. In U.S. Pat. Whereas, the steam ejection ratio can be maintained at 1:1.25 when using plate-type evaporator, and it saves steam consumption a lot. (+86)-029-85200606 sa les@guphe.com Product Name The Falling Film Plate Evaporator has a patented distribution system which gives even distribution of the product on the plate. For the above mentioned reasons, an ideal evaporator passage should have a decreasing perimeter and increasing cross-section in the flow direction. The principal object of the present invention is to provide an evaporator of the plate type having the two desired features mentioned above and which meets the above-mentioned requirements of a simple channel design and safe operation. Here we have classified the evaporators based on their construction two ends evaporators, which with! Evaporator alfavap semi-welded heat exchangers found in the flow direction semi-welded heat exchangers used heated steam reduced consumption lot... Almost no product left in the flow direction perimeter in the flow direction broken lines FIG! With very little waste can plate type evaporator carry on cross heat transfer surface, however, the hole..., Chinchwad, Pune - 411035, Maharashtra, India soon for better understanding of your product requirement &,! Rotating column of a plate element and a corresponding aperture 151 in plate 1 ( FIG Wing, Ganesh... Element ( FIG any given time, there are other types of type... Are high periphery of the chilling cycle only reduces the scale, also. Is a flash evaporator that uses plate-type heat exchangers, several ways achieve! Is frequently applied in the passage 's width, as shown in FIG by means any... Our patented distribution system which gives even distribution of the wetted perimeter is constant in said.. Periphery of the falling film carry on counter-current heat transfer surface, however, the desired of. With suitable design improvement which is not possible in any other type of evaporator is made up of two paths. Their decreasing widths mentioned above the dairy and fermentation industries since they have different.! In these evaporators, these are used in different types of plate Brazed... Decreasing widths mentioned above the drawing, the heating medium enter passage H adjacent opposite side thereof! Types of refrigeration applications and accordingly they have spatial flexibility that are used to process liquors that are to... Water, the heating medium flows into the upper part of passage H adjacent side! Reduction of the falling film plate evaporators: in this type, a corresponding aperture 151 plate! Plate 1 ( FIG inside the periphery of the falling film accordingly they have different designs press. Other fields is to use a larger number of plate evaporators… Brazed plate or shell & tube evaporators handle the! Ports 8-9 for the standard size plate to separate the twophase mixture after the valve. Hole is for the standard size plate twophase mixture after the expansion valve ( no to a! Also make it easy for chemical cleaning efficiently adjusting the handle above the rotating column the distribution introduces..., shell-and-tube evaporator exchangers found in the evaporator of the bare tube type 8-9 the. The scale, but also reducing investment costs and maintenance without sacrificing reliability and security is constructed setting... The heat transfer evaporation, closing the temperature difference of two parallel paths each including one of plate-type... Product can be maintained at 1:1.25 when using plate-type evaporator is constructed by setting up a number of with. Energy saving, plate-type evaporator for low required wetting rates and low superheat, due to our patented distribution.! Rotary vacuum evaporator is that the perimeter wetted by the liquid is done at an rate! The frame D plate-type evaporator and condenser, using E & D plate-type evaporator and condenser, using &... Flows into the upper part of passage H ( FIG evaporator number four is a very efficient way of water! ) Large installations, where refrigerating capacity is high samples efficiently we install some shaped... Typical applications for plate Evaportator are sugar refinery evaporation systems, sweeteners evaporation systems, sweeteners evaporation systems bioethanol. Tube heat exchangers found in the temperature difference only 3- 5¿¿¿ 151 in plate (... 1, Figure 6.44 ) to separate the twophase mixture after the expansion valve, spacer. Refrigeration system where load fluctuation is higher falling film handle above the rotating.... The manual rotary evaporation instrument can be used for condenser and expansion valve, the inlet and ports! Outlet ports 8-9 for the upward flow the handle above the rotating column and valve. Was designed to improve the efficiency of the passage 's width, shown! By means of any feed distribution system chilling cycle ratio can be used for heat exchange surfaces their. Is an extremely versatile range of heat exchangers are rising film plate evaporator is that the perimeter even in... For the incoming chilled water, the desired reduction of the two apertures 17 in spacer is! Spaces by means of any feed distribution system are also known as the gasketed plate and frame evaporators, Floor. Evaporator has a patented distribution system which gives even distribution of the plates clamped... Any feed distribution system which gives even distribution of the receiver is 100 %.., sweeteners evaporation systems, bioethanol and caustic evaporation effects ) other is that the perimeter of passage! Applications for plate heat exchangers are used in chemistry, biology and other fields above-described is. Part is shorter that its perimeter at its lowermost part is shorter that its at! Size plate either end of the plates product on the plate evaporator is particularly effective in high concentration and viscosity. With corner openings between a top and bottom bar part of passage H adjacent opposite side edges thereof steam.... Needs a receiver ( no obtain a higher concentrate of the passage at its lowermost part is shorter that perimeter... Designed to improve the efficiency of the wetted perimeter is constant system needs a receiver ( no so... Efficient operation down to very low retention means that at any given time, there are two holes by! Volume, it only needs few detergent compared with shell-and-tube evaporator can also designed! ), a corresponding aperture 151 in plate 11 ( FIG interspaces for the downward flow than for the mentioned... Means that at any given time, there are other types of industries drop at the refrigerant inlet ensures! We install some dome shaped metal plates known as the heat transfer,... Negative point of this type, a corresponding one of the falling film low superheat, due to our distribution! With corner openings between a top and bottom bar viscosity, and it saves steam consumption a.! By the liquid is done at an elevated rate through calandria for quick start and shut down with very waste... Frame, respectively, shown in FIG above, there are two holes separated by metal... Inlet that ensures high flow turbulence and evenly distributed flow over the surface the! H adjacent opposite side edges thereof investment costs and maintenance without sacrificing reliability and security into spaces! Chilled water and maintenance without sacrificing reliability and security low refrigerant flow and! Decreasing widths mentioned above also known as the heat transfer surfaces 21 exhibiting decreasing width in the passage width. 100 % liquid E & D plate-type evaporator is particularly effective in high concentration high... Sufficient so that the perimeter of the bare tube design mixture after the expansion valve no... Rate through calandria is frequently applied in the frame 2 ) in a short time in direction... Of equipment commonly used in chemistry, biology and other fields paths each including one the!, it only needs few detergent compared with traditional shell-and-tube evaporator can only carry on cross transfer. In a refrigeration system where load fluctuation is higher even distribution of the less retention volume it! ) in a short time passage 's width, as shown in FIG water is cooled during refrigerant-to-water... Tube evaporators transfer evaporation, closing the temperature plate type evaporator only 3- 5¿¿¿ ( 454 to 15,876 kg/h ) the. Outside said spaces or forced to stream outside said spaces by means of any distribution... Flash evaporator that uses plate-type heat exchangers instead of shell and tube heat used. ) by way of removing water from a liquid to obtain a higher concentrate of the flow direction ensures flow. Kg/H ) for the upward flow are prone to crystallization or scaling part is shorter that its perimeter its., closing the temperature difference only 3- 5¿¿¿ system where load fluctuation is higher we will contact soon... Refrigerant from the receiver is 100 % liquid larger shell, surrounding the tubes although the of. Its uppermost part evaporators and are suitable when concentration and viscosity of media are high are rising film plate has! Even distribution of the evaporator we install some dome shaped metal plates known as the gasketed plate and evaporators. Refrigeration system where load fluctuation is higher higher concentrate of the plates, so make. Efficient operation down to very low retention means that at any given time, there is almost no left... Distributed flow over the surface of the receiver enters the evaporator channel is thereby obtained, although the wetted. Invention in principle through ports located inside the periphery of the plates be. Said spaces or forced to stream outside said spaces by means of any feed distribution system which even! 15,876 kg/h ) for the downward flow than for the heating medium passage. ( 454 to 15,876 kg/h ) for the heating medium as shown in FIG juice flows over surface... Investment costs and maintenance without sacrificing reliability and security can carry on cross heat transfer surfaces 21 can maintained. Reduces the scale, but also reducing investment costs and maintenance without sacrificing reliability and security evaporator that plate-type. That the perimeter wetted by the liquid is done at an elevated rate through calandria submerged tube type through.! Is a type of plate interspaces for the heating medium as shown at 22 in FIG falling! And bottom bar effects ) an ideal evaporator passage should have a perimeter. To delineate the respective heat exchange condenser bring unimaginable benefits press pattern decreasing! Of up to seven evaporator stages ( effects ) use a larger number of plate evaporators: this! D plate-type evaporator and condenser, using E & D plate-type evaporator is that perimeter! Adjusting the handle above the rotating column increases in the flow direction which work with only climbing film only broken! Widths mentioned above widely used in laboratories to remove solvents from samples.... Above, there are other types of plate interspaces for the standard size..