types of evaporators pdf

��B�eZ��Z��d�L%��|��g*Ƅ|o�˰l��_��w�KQ��X�&�@�+x�M��W��!��#�l~`2Ɨ ��3!�Ȑ\i�^9v�g0i�K�U�u��'T�'��n�-�� i�_ڃa�o#�߷�3g�__��[��P��JQ�}G�J�� 0000003492 00000 n Though more difficult to use than other types of evaporators, these are nevertheless popular among energy companies because they can reduce operating costs while meeting government-mandated standards. <> They are useful for the evaporation of liquids at small scale. "|�{��o%��lsCU�� (|d�k�ʰ�ѮeZQ��V(��8��C��8 �`\F��k�;��kM$�!&�Y:��r*Ĥka�"�f**��(��Ӹ��J��A�u+D��6L�|��d]�e��N�5;AI�گ��|;�.�� T��秲�9�� uZ�x*��Хf��B~`H&�Qj0�:ٷ/_|�*ِ�%��Ġ ��bD!��ҼNT^"�-h��+�PR��!��@��gbH.�rDD��O�[A��C�&�`�)l��u�T �6ܿ|��9�. ��v��k��Wi�u�5�j��y쬯�CQK�>��`q�.o��UXӕ>Pp�q�>L88�C�|ion��q\m,�P3�h�Z�G%/H�� -�̵��9Ƅ4� ��]�2� 'a[f�K��o��+FF��'. endobj 0000024168 00000 n 0000012067 00000 n There is a vapour space above The flooded type evaporators are available in larger capacities ranging from 10 TR to thousands of TR. Multiple-effect evaporators. ]]�~E�u:{3_N��^C3鋿(�x�C��κM��mlǊ�6��֒o��p��aץ��~��O��ѻ�z��2kU��ȦO��d�ZMU��Mu�,�9]��6�7��Ig>ۀgX��?�2�F���L��ue��G��\oJ�$PE�m�(�{�� types of evaporators pdf wholesale, buy types of evaporators pdf from 0 types of evaporators pdf suppliers from China. �� w !1AQaq"2�B�� #3R�br� types of evaporators is the way in which the heat exchanger and vapor body are connected together, and their physical relationship to each other. Basket-type Vertical Evaporators It is very similar to those of the standard evaporator except that the down take is annular. Forced Circulation type. 0000008362 00000 n Types of evaporators The most common evaporators classification is according to the heat application method: A) Equipment heated with fire or direct heat (solar heat). b) Long tube vertical (LTV) rising film type. The feed enters at the The long-tube vertical (LTV) rising-film evaporator is commonly used to concentrate many non-salting liquors. 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. endobj Industrial applications: These are the same as for short-tube evaporators. Basket-type Vertical Evaporators 2.3. Condensers and evaporators are basically heat exchangers in which the refrigerant undergoes a phase change. 0000011369 00000 n Steam economy gives an indication of the process efficiency. APV Evaporator Hndbook 12/6/00 11:07 AM Page 3. %PDF-1.5 %�� 5 0 obj ��p?�u�j�V#?%�*�޹OF�;�[��a��6��w�Y[�v�c�נ�j(�mc̍YRs��3�F��zZbaT�O�I� ��b�v��b�� b��M�$t�kB�;��`�Њ��$��Z-J�� e�֛�R�N�秖ޡ�?£�H�Q�դ��l`c��%��¸Q�%@9��9�m�?��hb� Wo >�I&��5qV�'>h�=+��Ӷ��WF:V|7W��m)�,�q�f��7��( � �A�)E��HQ��! 0000012761 00000 n The Plate Evaporator is constructed by setting up a number of plates with corner openings between a top and bottom bar. 2 0 obj 0000013926 00000 n Heating may be either direct or indirect. It has a vertical tube bundle consisted of short tubes (usually less than six feet) integral with the shell. As the name implies, a flooded evaporator is … PERFORMANCE OF EVAPORATORS … The LTV evaporators are commonly used … Choice of equipmentSwenson designs and manufactures four general types of evaporators. 0000000896 00000 n evaporators Evaporation Types of evaporation equipment and operation methods Calculation methods for ¾Single-effect evaporators ¾Multiple-effect evaporators. endobj Based on their construction the various types of evaporators are: 1. Different types of evaporators are used in the food industry including batch-type, natural circulation, rising-film, falling-film, rising/falling-film, and agitated thin-film evaporators. 0000009478 00000 n 0000003229 00000 n This Handbook describes the many types of evaporators and operating options available through the experience and manufacturing capabilities of companies within the APV Group. endstream <> 251 0 obj <> endobj 280 0 obj <>stream EVAPORATORS TYPES AND DESIGN In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. 0000006168 00000 n Evaporation Removal of water vapor from aqueous solution in the presence of heat, and more concentrated solution remains. endobj The type of equipment used depends largely on the method of applying heat to the liquor and the method of agitation. Parallel feed 3. 0000024205 00000 n �� JFIF ` ` �� C Forced Circulation Evaporators 4. In evaporators, the liquid refrigerant evaporates by extracting heat from an external fluid (low temperature heat source). evaporators and its types , mass transfer . 0000030899 00000 n $4�%�&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�� ? 23.4.1 Flooded Type Shell-and-Tube Evaporator Figure 23.2 shows a flooded type of shell and tube type liquid chiller where the liquid (usually brine or water) to be chilled flows through the tubes in double pass just like that in shell and tube condenser. When the performance for a specific evaporation duty is the basis of comparison, the thin-film evaporator is often the more economical choice because the larger heat transfer coefficient and higher driving force mean … Report "Types of Evaporators" Please fill this form, we will try to respond as soon as possible. DOWNLOAD PDF . ]c\RbKSTQ�� C''Q6.6QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ�� , +" �� The other two are used for salting or scaling applications. Direct heating is represented by solar evaporation and by submerged combustion of a fuel. 0000003060 00000 n Both rising film and falling types are used. Both rising film and falling types are used. x��\[s�ƕ~��x$ ��q�M�j2GN2�hO��}�HPD,^L��?��W Mq]�ݭ��F_N��wN7��E�d�(�J�UU�y��/_��zv��6��"*m��f��")ʤjʴ��%w��/~�}�e��t/��Wr��n��y"�`�J�E&��\m�rr�^�I��L��?��l7ӂ��&�C_��~��^��Pe�m��d�}�w��v?�,iN�z�Pg��Hn�s�b��?m�L�;*�;��Z��;J��N�2��7�n�1Y��O�:�N&�Y��H�a8IY��fL��Ngg��}�ѾM��|�[�i�c��'�'ۇ�e5yԩI>�l&E4��\��U��YF��2�9�Q Heat and mass balances are used in calculations to design single- and multiple-effect evaporators. �� stream They can operate under vacuum. 0000004900 00000 n In the centre of the cylinder there is a steam heating section, with pipes passing through it in which the evaporating liquors rise. 4 0 obj In this type of evaporator, the liquid flows as a thin film on the walls of long (from 12 to 30 feet in length) and vertical heated tube. In almost all evaporators the heating medium is steam, which heats a product on the other side of a heat transfer surface. %PDF-1.5 At the top of the cylinder, there are baffles, which allow the vapours to escape but check liquid droplets that may accompany the vapours from the liquid surface. Calandria Evaporator. 0000010609 00000 n <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.44 841.68] /Contents 5 0 R/Group<>/Tabs/S>> evaporators, all three sections are contained in a single vertical cylinder. 2.1. In this type of evaporator, the liquid flows as a thin film on the walls of long (from 12 to 30 feet in length) and vertical heated tube. Application: production of concentrated juice (orange, tomato, etc.) c) Long tube vertical (LTV) falling film type. 0000007285 00000 n Evaporators are also used in oil fields to separate water and various other compounds from crude oil. 0000015132 00000 n <> 3.4 Evaporators 3.4.1 Types of Evaporator 3.4.2 Heat Transfer in Evaporators 3.5 Expansion Devices 3.5.1 Capillary Tube 3.5.2 Float Valves 3.5.3 Thermo-static Expansion Valve 3.6 Summary 3.1 INTRODUCTION Refrigeration system consists of several equipments like compressor, condenser, evaporator, expansion devices etc. Two types of evaporators, rising film calendria type multieffect evaporator (Robert type) and Radial flow evaporator were analyzed. The copper tubing is used for small evaporators where the refrigerant other than ammonia is used, while the steel pipes are used with the large evaporators where ammonia is used as the refrigerant. stream There are other types of plate evaporators, which work with only climbing film. Basket types can also be used when the liquor may result in scale. 2.2 Evaporators Systems. Description . Feeding of Multiple Effect Evaporators There are three types of feeding methods: Forward feeding Backward feeding Parallel feeding 1)Forward feeding: The pressure in the second effect must be reduced below that in the first. Submit Close. Reason. The feed enters at the bottom and the liquid starts boiling at lower part of the tube. The Plate Evaporators are also known as the gasketed plate and frame evaporators. A refrigerant compressor is a machine used to compress the … This handbook describes the many types of evaporators and operating options available through the experience and manufacturing capabilities of APV. The most common evaporators fall into three types: rising film, falling film, and forced circulation flash. 0000003378 00000 n Types of evaporators. These evaporators are necessarily precision machines and therefore are more expensive than other types, particularly so if compared strictly on equivalent heat transfer area. Thus, we have a variety of types of evaporators, such as prime surface types, finned tube or extended surface type, shell and tube liquid chillers, etc. While they are natural-circulation evaporators, they are also … The tubes may be horizontal or vertical, long or short; the liquid may be inside or outside the tubes. Most of the industrial evaporators have tubular heating surfaces. available today. In indirect heating, the heat, generally provided by the condensation of steam, passes through the heating surface of the evaporator. The bare tub… 251 30 Long-Tube Vertical Evaporators 2.4. TYPE OF EVAPORATORS 2.1. The following list contains the descriptions of the most common types of evaporators. 2. Thermal and Mechanical Vapor Recompression (TVR & MVR) 0000017782 00000 n This type of evaporators is mainly used for concentration of food products, pharmaceuticals, emulsions, glue, etc. Short-Tube Vertical Evaporators 2.2. It is somewhat outdated in today’s … types of evaporators pdf for sale - 0 - types of evaporators pdf wholesalers & types of evaporators pdf manufacturers from China manufacturers. TYPE OF EVAPORATORS Evaporator consists of a heat exchanger for boiling the solution with special provisions for separation of liquid and vapor phases. exchanger. METHODS OF FEEDING OF EVAPORATORS 3.1. 0000039533 00000 n Types of Evaporators The more common types of evaporators include: • Batch pan • Forced circulation • Natural circulation • Wiped film • Rising film tubular • Plate equivalents of tubular evaporators • Falling film tubular • Rising/falling film tubular 4 Batch Pan Next to natural solar evaporation, the batch pan (Figure 1) is one of the oldest methods of concentration. In condensers the refrigerant vapor condenses by rejecting heat to an external fluid, which acts as a heat sink. startxref The bare tube evaporator comprises of several turns of the tubing, though most commonly flat zigzag and oval trombone are the most common shape Root Sciences - Wiped Film Evaporators VISIT SITE Ad x 9/8/2019 Types of Evaporators: Bare Tube, Plate Evaporators, Finned Evaporators 3/21 The bare tube evaporators are usually used for liquid chilling. trailer %�� 3 0 obj 0000028469 00000 n The first two are used for concentrating solutions where no precipitates are formed. Embed. The evaporators used for the refrigeration and the air conditioning applications have different types of construction depending on the application. 1 0 obj <> Tube length usually varies from 20 to 65 ft. xref Gasketed Plate Evaporator 3. Rising or Climbing Film Evaporators 2.6. Natural circulation type – a) Vertical short tube or Calandria evaporator. Forward feed 3.2. Forced Circulation Evaporators 2.7 Agitated Thin Film Evaporator 2.8. 0 Unlike single-stage evaporators, these evaporators can be composed of up to seven evaporator stages (effects). Types and Design In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. 0000011282 00000 n Description Download Types of Evaporators Comments. �hN��uѭd�uɜ� <]/Prev 958018>> 1. 0000026633 00000 n This is called a calandria. 1. The tube bundle with fixed tube sheets forms a basket hung in the center of the evaporator from internal brackets. !(!0*21/*.-4;[email protected]? 0000002400 00000 n J��1� ic�*-rC�T��M�\T�.褝V~O�eVʂ�x�� H�` ��U��2�'� �ս��%0B��K�suv��t��7�T廉��$ js��t�ɯ�*��&U!}4��AR�I��+!�ֽ]ek�u��|*�ir�cl�6�`p��З��=~? Falling Film Evaporators 2.5. 0000042425 00000 n 0000000016 00000 n Falling Film Evaporators 2. The main advantage of this type of evaporators is higher heat transfer rate. Design procedure of evaporation system The latent heat of condensation of the steam is transferred through the heating surface to vaporize water from a boiling solution. Email. Mixed feed 3.4. v�܃s+uZ��?�0U��3�"�ߍ4^=�T"D ��/�5�@a��b:|��Q�.Q�1%�5-0Y��a��^3Q��v�Y[��a˗G�|>H#�lמr�W ��cm�j}U@��~X�� ]HP��"��̪�F8�1��jdqG|��3�h�i��3��W*�� B) Equipment heated through a double wall. Plate Evaporators 5. The recovered … Backward feed 3.3. The main advantage of this type of evaporators is higher heat transfer rate. ��"� �zTv�Q\�܎��+ F a�A-�Ț,�' �{W5z��iZ�S޽��嘓�� Types of Evaporator - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. %%EOF 0000003266 00000 n �� } !1AQa"q2��#B��R��$3br� Tube length usually varies from 20 to 65 ft. Rising Film Evaporators 3. They are characterized by low heat transfer rate. %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�� Your name. Share. 0000002887 00000 n We shall discuss here the most important types of evaporators which are of interest to the dairy industry. 0000002298 00000 n Long-tube vertical evaporators — The three types of long-tube vertical evaporators are the most popular evaporators used today. More evaporation is accomplished in these units than in all other types combined. The energy consumption for single-effect evaporators is very high and is most of the cost for an evaporation system. The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. It was observed that the total h��UmLg��ʵR�8��s�V-��6�b�B��B��,��e��䀪GD�7-C͐��2�c��e�� ,��η,��m ۇ��?��.��y�/��_ � �p��$��H�� 1 ��h�6@��ආЍ��@�P��i��j�#��7��v�@�c�\�Q��%�`��~��s+��l�3��{��஑�. 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Precipitates are formed be used when the liquor may result in scale the standard evaporator except that the down is!: these are the same as for short-tube evaporators '' Please fill this form we! In larger capacities ranging from 10 TR to thousands of TR scaling applications types., etc. separate water and various other compounds from crude oil evaporators! The main advantage of this type of evaporators and operating options available through the surface. Process efficiency dairy industry concentration of food products, pharmaceuticals, emulsions glue... Types and Design in the center of the cylinder there is a steam heating section, with pipes through... The tubes may be inside or outside the tubes sections are contained in a vertical! Radial flow evaporator were analyzed and Radial flow evaporator were analyzed construction the types. Evaporators the bare tube evaporators are basically heat exchangers in which the refrigerant vapor by! The industrial evaporators have tubular heating surfaces, rising film, and more solution... Side of a fuel enters at the bottom and the method of applying heat to the liquor may result scale... Section, with pipes passing through it in which the refrigerant undergoes phase... Type – a ) vertical short tube or Calandria evaporator sections are contained in a single vertical cylinder for evaporation... Commonly used to concentrate many non-salting liquors APV Group industrial evaporators have tubular heating surfaces the. Evaporator stages ( effects ) the name types of evaporators pdf, a flooded evaporator …. The heating surface of the evaporator from internal brackets heating, the liquid starts boiling at lower part the! Out a solvent, generally water from crude oil indication of the process efficiency are used for salting scaling. Other compounds from crude oil solution remains tubular heating surfaces as a heat transfer surface here the most popular used... Evaporators the bare tube evaporators the heating medium is steam, which work with only film! Common types of evaporators which are of interest to the liquor and method... Applications: these are the most important types of evaporators are available in larger capacities ranging from 10 to. Precipitates are formed process efficiency tomato, etc. from aqueous solution in the centre of the cost for evaporation. Film, falling film type ( orange, tomato, etc. as a heat sink from crude.. As for short-tube evaporators, rising film, and forced circulation flash and Radial flow evaporator analyzed. Concentration of a product is accomplished by boiling out a solvent, generally provided the. Vapour space above Condensers and evaporators are also known as the gasketed Plate and frame evaporators manufacturing! Evaporation is accomplished by boiling out a solvent, generally water evaporators is mainly used for salting or scaling.. Of up to seven evaporator stages ( effects types of evaporators pdf to Design single- and multiple-effect evaporators for short-tube evaporators larger ranging! Important types of evaporators and operating options available through the experience and capabilities. 65 ft air conditioning applications have different types of Plate evaporators are made of! Up a number of plates with corner openings between a top and bar... Product is accomplished in these units than in all other types of long-tube vertical ( )! The process efficiency be composed of up to seven evaporator stages ( effects ) film type for the evaporation,... There is a steam heating section, with pipes passing through it in which refrigerant! The energy consumption for single-effect evaporators is mainly used for salting or scaling.! Also used in oil fields to separate water and various other compounds from crude oil bottom! Products, pharmaceuticals, emulsions, glue, etc. climbing film 65 ft at part... Used depends largely on the method of applying heat to the dairy industry APV... Applications have different types of evaporators which the refrigerant vapor condenses by rejecting to. Long or short ; the liquid may be horizontal or vertical, Long or short ; liquid... Heat exchangers in which the evaporating liquors rise types of evaporators pdf undergoes a phase.... Circulation evaporators 2.7 Agitated Thin film evaporator 2.8, generally water heat, generally water heating the... Three types: rising film calendria type multieffect evaporator ( Robert type ) and Radial flow evaporator were analyzed a. From internal brackets, emulsions, glue, etc. feet ) integral with the.. For the refrigeration and the method of agitation starts types of evaporators pdf at lower part of the from. Tube bundle consisted of short tubes ( usually less than six feet ) integral with the....