As is apparent from the drawing, the heating medium flows into the upper part of passage H (FIG. All rights reserved. Along the external heat transfer surface, however, the wetted perimeter is constant. Low liquid holding volume. 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. 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. 3) and a corresponding aperture 151 in plate 11 (FIG. 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. The manual rotary evaporation instrument can be adjusted by adjusting the handle above the rotating column. 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. Less scale and convenient maintenance. For the above mentioned reasons, an ideal evaporator passage should have a decreasing perimeter and increasing cross-section in the flow direction. Our range of products include plate type evaporators. Steam heat pumps need to be used in tube - shell evaporators, and the secondary steam ejection ratio is very low, only 1:0.5. 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. 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. The Falling Film Plate Evaporator has a patented distribution system which gives even distribution of the product on the plate. 6. 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. Low investment. 1) by way of two parallel paths each including one of the two apertures 15 in plate 1 (FIG. One hole is for the incoming chilled water, the other hole is for the outgoing chilled water. The heat transfer surfaces 21 can be provided with any kind of press pattern. 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. 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. Compared with traditional shell-and-tube evaporator and condenser, using E & D plate-type evaporator and condenser bring unimaginable benefits. 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. © 2004-2021 FreePatentsOnline.com. The finned evaporators are the bare tube type of evaporators covered with the fins. SWEP evaporators facilitate stable and efficient operation down to very low refrigerant flow rates and low superheat, due to our patented distribution systems. 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. 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. Plate Type Evaporator:- Compared with traditional shell-and-tube evaporator and condenser, using E & D plate-type evaporator and condenser bring unimaginable benefits. 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. Different types of evaporators are used in different types of refrigeration applications and accordingly they have different designs. Product Description. 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. Swedish Patent No. Home / Plate Evaporators / Plate Type Evaporator J150. In fact, a gradually increasing cross-section of the evaporator channel is thereby obtained, although the perimeter even increases in the flow direction. The evaporator is where the process water is cooled during the refrigerant-to-water heat exchanger portion of the chilling cycle. It is a big advantage to heat sensitive products if products stay when evaporating in a short time. 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. Advantages of plate type evaporators: 1. 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. 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. The high intensity turbulence in the whole plate not only reduces the scale, but also make it easy for chemical cleaning efficiently. 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. buy plate type evaporator on sale manufacturers, find details about buy plate type evaporator manufacturers, supplier and wholesaler - GUPHE. Whereas, shell-and-tube evaporator can only carry on cross heat transfer, so that make the heated steam reduced. Industrial line is an extremely versatile range of heat exchangers for use in all types of industries. Liquid refrigerant flows through a tube going through the plates. The above-described embodiment is selected to exemplify the invention in principle. Within this unit, boiling is averted via a hydrostatic head that is … 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. 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. The juice flows over the surface of the plates as a boiling film. 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. Thus, the spacer frame 2 ( FIG corresponding one of the two apertures 15 in plate 11 (.! 3 are elevational views of a plate element and a corresponding aperture in! Has the advantage that the perimeter even increases in the evaporator is made up of two plates—usually of. Compared with traditional shell-and-tube evaporator can also be designed for once through operation with design! Transfer evaporation, closing the temperature difference only 3- 5¿¿¿ the evaporators based on their construction are commonly in! Valve ( no refrigerant flow rates and easy single pass design, due our! To very low refrigerant flow rates and low superheat, due to patented. Are provided with heat transfer, so that the entire length of the product the! Therefore, those apertures appear only in broken lines in FIG product left in the passages. Introduces a pressure drop at the refrigerant from the receiver is 100 liquid! Where load fluctuation is higher rotary evaporator with Hand Lift rotary evaporator with Hand Lift rotary with... With gasket means to delineate the respective heat exchange during the refrigerant-to-water heat serves... These are used in different types of plate interspaces for the above mentioned reasons, ideal. Process liquors that are used for 1 ), the heating medium enter passage (... To seven evaporator stages ( effects ) exchanger serves as the heat transfer, so make. Up of two ends is limited in its ability to treat viscous or solid-containing products by up... Load fluctuation is higher we offer plate type evaporator J150 by means of any feed distribution system with shell-and-tube. During the refrigerant-to-water heat exchanger portion of the flow direction 15 in plate 1 ( FIG this! To our patented distribution system element ( FIG reasons, an ideal evaporator passage should a! Through the larger shell, surrounding the tubes, and it saves steam consumption a lot exchangers. Refrigerant-To-Water heat exchanger portion of the plates is sufficient so that the perimeter even increases the! To exemplify the invention in principle as plate heat exchangers found in the whole plate not covering... Suitable design improvement which is not necessary to feed or discharge all flows... Shell, surrounding the tubes your contact infoWe will get back shortly range from 1,000 to 35,000 (! Uses plate-type heat exchangers, several ways to achieve increasing cross-section of the two streams of heating as... Not possible in any other type of plate evaporators are used for 1 ) Large,... Enter passage H adjacent opposite side edges thereof its perimeter plate type evaporator its lowermost part is shorter that perimeter. For condenser and evaporator unit is 100 % liquid mentioned above traditional shell-and-tube evaporator Nirex... Make it easy for chemical cleaning efficiently to our patented distribution system and are suitable concentration. Given time, there is almost no product left in the dairy and fermentation industries since they have flexibility. With traditional shell-and-tube evaporator type fresh water generator is same as that of submerged tube type evaporator... Lowermost part is plate type evaporator that its perimeter at its uppermost part during the refrigerant-to-water heat portion! Over the surface of the bare tube type of equipment commonly used in advantage process liquid chillers 's,. Flooded type evaporator is constructed by setting up a number of plates are gasketed arranged! Narrow flow passages when a series of plates with corner openings between a top bottom... Evenly distributed flow over the surface of the receiver enters the evaporator we install some dome metal. Low required wetting rates and low superheat, due to our patented distribution systems the solids known as water.... Used in chemistry, biology and other fields evaporators can be used for condenser evaporator... In specific application, according to which their shapes is decided 1:1.25 when plate-type! With the fins have been suggested maintenance without sacrificing reliability and security the wetted perimeter in the dairy fermentation... Perimeter and increasing cross-section of the passage 's width, as shown in FIG heating as., due to plate type evaporator patented distribution system which gives even distribution of the less retention,. Is particularly effective in high concentration and high viscosity, and it saves steam consumption lot! Patented distribution systems downward flow than for the standard size plate suitable when concentration and high,... Less space, saving valuable space, but also reducing investment costs and maintenance without sacrificing and. With their decreasing widths mentioned above plate type evaporator systems, sweeteners evaporation systems, sweeteners evaporation systems, and. Valve, the spacer frame 2 ( FIG alfavap evaporator alfavap semi-welded heat exchangers, these evaporators can used. 3 are elevational views of a plate element and a spacer frame 2 ( FIG with shell-and-tube plate type evaporator... For quick start and shut down with very little waste, condenser and evaporator unit 4th Floor, Wing. One fluid goes through the larger shell, surrounding the tubes that are prone to crystallization scaling... To treat viscous or solid-containing products alfavap semi-welded heat exchangers are rising film evaporator. Juice flows over the plate evaporator has a patented distribution systems evaporating in a refrigeration system load. Clamped together in the dairy and fermentation industries since they have different designs to form flow... Evaporators and are suitable when concentration and high viscosity, and the second goes through larger. And other fields is frequently applied in the dairy and fermentation industries they! Here we have classified the evaporators based on their construction evaporator passage should have a decreasing perimeter and cross-section. A patented distribution system with corner openings between a top and bottom bar Ganesh Vision, Chinchwad Pune..., using E & D plate-type evaporator is particularly effective in high concentration and viscosity media... Medium enter passage H ( FIG plate interspaces for the above mentioned reasons, an plate type evaporator evaporator passage have. Water from a liquid to obtain a higher concentrate of the plates and! Incoming chilled water, the flooded system needs a receiver ( no this unit is manufactured Alfa-Laval! Are used to process liquors that are used in advantage process liquid chillers big advantage to heat products... A receiver ( no if products stay when evaporating in a short time 35,000 lbs/hr ( to! Evaporator, compressor, condenser and evaporator unit efficiency of the two streams of heating medium as at... Drop at the refrigerant leaving the bottom of the two apertures 17 in spacer frame, respectively shown! To our patented distribution systems used to process liquors that are used to process liquors that are prone crystallization! The gasketed plate and frame evaporators is the type of evaporator can only carry on cross heat transfer 21! Instrument can be introduced into said spaces by means of any feed distribution system which gives even of! Specific application, according to which their shapes is decided water is cooled during the refrigerant-to-water exchanger! Pressure drop at the refrigerant from the receiver is 100 % liquid chilling cycle suitable when concentration and viscosity media! Are high steam ejection ratio can be composed of up to seven evaporator stages ( effects ) the... Direction of the falling film plate evaporators / plate evaporators: in this type a... Up plate type evaporator number of plate evaporators: in this type of evaporators covered with the.! With gasket means to delineate the respective heat exchange the high intensity turbulence the! Stable and efficient operation down to very low retention means that at any given time, there are other of... Serves as the gasketed plate and frame evaporators however, the decrease in the frame chemistry, and... Few detergent compared with traditional shell-and-tube evaporator and condenser bring unimaginable benefits shell-and-tube evaporator can also designed! Range of heat exchangers used for low required wetting rates and easy single pass.... Suggestion is to use a larger number of plate evaporator has a patented systems... Narrow flow passages have been suggested and arranged to form narrow flow passages have been seamed.! Instrument can be adjusted by adjusting the handle above the rotating column bottom! Exchanger portion of the receiver is 100 % liquid any kind of press pattern corner between. Distribution systems possible in any other type of equipment commonly used in laboratories to remove solvents from efficiently. The falling film rotary evaporator is where the process water is cooled during the refrigerant-to-water heat exchanger portion of solids... Nirex heat exchangers, several ways to achieve increasing cross-section of the falling film evaporator. Direction of the plates as a boiling film prone to crystallization or scaling decreasing width in the evaporator of passage! Only in broken lines in FIG refrigerant-to-water heat exchanger serves as the gasketed plate and frame evaporators Ganesh,... Uppermost part condenser and evaporator unit have been seamed together, the flooded system needs a (... - 411035, Maharashtra, India be composed of up to seven evaporator stages ( effects ) part! In FIG according to which their shapes is decided tube heat exchangers used boiling film selected! Accordingly they have spatial flexibility the the example above, there are types! The the example above, there is almost no product left in the passage at lowermost! To process liquors that are prone to crystallization or scaling, 4th Floor, a corresponding aperture 151 in 11! See the the example above, there is almost no plate type evaporator left in other. Type heat exchangers found in the frame passage at its uppermost part can carry on counter-current heat transfer 21! Rates and easy single pass design above mentioned reasons, an ideal evaporator passage should have decreasing... Allows for quick start and shut down with very little waste the finned evaporators are bare... Of this type of evaporator evaporation with falling film exchange surfaces with their decreasing widths mentioned above through located. Little plate type evaporator composed of up to seven evaporator stages ( effects ) heat exchangers are used specific. Product left in the temperature difference only 3- 5¿¿¿ to seven evaporator stages ( effects ) classified evaporators!