types of evaporators pdf

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 … The flooded type evaporators are available in larger capacities ranging from 10 TR to thousands of TR. 0000003378 00000 n Falling Film Evaporators 2. Choice of equipmentSwenson designs and manufactures four general types of evaporators. 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. 5 0 obj Heat and mass balances are used in calculations to design single- and multiple-effect evaporators. endobj 0000002887 00000 n 2. Condensers and evaporators are basically heat exchangers in which the refrigerant undergoes a phase change. <> 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. 251 0 obj <> endobj Tube length usually varies from 20 to 65 ft. TYPE OF EVAPORATORS 2.1. The energy consumption for single-effect evaporators is very high and is most of the cost for an evaporation system. 0000012761 00000 n 0000030899 00000 n More evaporation is accomplished in these units than in all other types combined. Natural circulation type – a) Vertical short tube or Calandria evaporator. Forced Circulation Evaporators 4. APV Evaporator Hndbook 12/6/00 11:07 AM Page 3. Heating may be either direct or indirect. available today. 0000011282 00000 n Plate Evaporators 5. 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). Types of evaporators. Rising or Climbing Film Evaporators 2.6. This Handbook describes the many types of evaporators and operating options available through the experience and manufacturing capabilities of companies within the APV Group. 0000017782 00000 n 0000012067 00000 n B) Equipment heated through a double wall. Submit Close. EVAPORATORS TYPES AND DESIGN In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. 0000011369 00000 n 0000003229 00000 n ���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�� Application: production of concentrated juice (orange, tomato, etc.) trailer ���� JFIF ` ` �� C xref Industrial applications: These are the same as for short-tube evaporators. b) Long tube vertical (LTV) rising film type. ]]�~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�(�{��� Mixed feed 3.4. In condensers the refrigerant vapor condenses by rejecting heat to an external fluid, which acts as a heat sink. Embed. The evaporators used for the refrigeration and the air conditioning applications have different types of construction depending on the application. 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. 0000004900 00000 n Gasketed Plate Evaporator 3. 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. Report "Types of Evaporators" Please fill this form, we will try to respond as soon as possible. $4�%�&'()*56789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz�������������������������������������������������������������������������� ? 3 0 obj endobj There is a vapour space above 0000039533 00000 n 0000009478 00000 n Thus, we have a variety of types of evaporators, such as prime surface types, finned tube or extended surface type, shell and tube liquid chillers, etc. Description . METHODS OF FEEDING OF EVAPORATORS 3.1. 0000008362 00000 n Based on their construction the various types of evaporators are: 1. In evaporators, the liquid refrigerant evaporates by extracting heat from an external fluid (low temperature heat source). We shall discuss here the most important types of evaporators which are of interest to the dairy industry. It was observed that the total Evaporators are also used in oil fields to separate water and various other compounds from crude oil. <> Calandria Evaporator. The most common evaporators fall into three types: rising film, falling film, and forced circulation flash. ���v�����k��Wi�u�5�j��y쬯�CQK�>��`q�.o��UXӕ>Pp�q�>L88�C�|ion��q\m,�P3�h�Z�G%/H�� -�̵��9Ƅ4� ��]�2� 'a[f�K��o��+FF��'. Forced Circulation type. 0000026633 00000 n Types of Evaporators The more common types of evaporators include: • Batch pan • Forced circulation • Natural circulation • Wiped film • Rising film tubular • Plate equivalents of tubular evaporators • Falling film tubular • Rising/falling film tubular 4 Batch Pan Next to natural solar evaporation, the batch pan (Figure 1) is one of the oldest methods of concentration. J��1� ic�*-rC�T��M�\T�.褝V~O�eVʂ�x���� H�` ��U��2�'� �ս���%0B��K�suv��t������7�T廉��$ js��t�ɯ�*��&U!}4���AR�I��+!�ֽ]ek�u��|*�ir�cl�6�`p��З����=~? 280 0 obj <>stream 2 0 obj This is called a calandria. 0000028469 00000 n evaporators Evaporation Types of evaporation equipment and operation methods Calculation methods for ¾Single-effect evaporators ¾Multiple-effect evaporators. Email. stream 251 30 0000024205 00000 n �� 0000000016 00000 n There are other types of plate evaporators, which work with only climbing film. It is somewhat outdated in today’s … 0000006168 00000 n %PDF-1.5 types of evaporators pdf for sale - 0 - types of evaporators pdf wholesalers & types of evaporators pdf manufacturers from China manufacturers. evaporators and its types , mass transfer . 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���{���஑�. ]c\RbKSTQ�� C''Q6.6QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ�� , +" �� Long-Tube Vertical Evaporators 2.4. 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� 0000015132 00000 n Basket-type Vertical Evaporators 2.3. Forward feed 3.2. �hN����uѭd�uɜ� 0000042425 00000 n <]/Prev 958018>> 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 The feed enters at the The LTV evaporators are commonly used … 0000000896 00000 n Thermal and Mechanical Vapor Recompression (TVR & MVR) Description Download Types of Evaporators Comments. ��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��! 1. It has a vertical tube bundle consisted of short tubes (usually less than six feet) integral with the shell. The recovered … Types and Design In the evaporation process, concentration of a product is accomplished by boiling out a solvent, generally water. Unlike single-stage evaporators, these evaporators can be composed of up to seven evaporator stages (effects). evaporators, all three sections are contained in a single vertical cylinder. endobj TYPE OF EVAPORATORS Evaporator consists of a heat exchanger for boiling the solution with special provisions for separation of liquid and vapor phases. The Plate Evaporators are also known as the gasketed plate and frame evaporators. "|�{���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�. This type of evaporators is mainly used for concentration of food products, pharmaceuticals, emulsions, glue, etc. Basket types can also be used when the liquor may result in scale. The following list contains the descriptions of the most common types of evaporators. %%EOF ��"� �zTv�Q\�܎��+ F a�A-�Ț,�' �{W5z��iZ�S޽��嘓�� In indirect heating, the heat, generally provided by the condensation of steam, passes through the heating surface of the evaporator. 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. The two general types of evaporators used in today’s refrigeration systems are floo and dry, or direct expansion (DX), evaporators. 2.1. <> 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. Both rising film and falling types are used. In almost all evaporators the heating medium is steam, which heats a product on the other side of a heat transfer surface. As the name implies, a flooded evaporator is … 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. v�܃s+uZ��?�0U��3�"�ߍ4^=�T"D This handbook describes the many types of evaporators and operating options available through the experience and manufacturing capabilities of APV. The type of equipment used depends largely on the method of applying heat to the liquor and the method of agitation. endstream 0000010609 00000 n DOWNLOAD PDF . They can operate under vacuum. Long-tube vertical evaporators — The three types of long-tube vertical evaporators are the most popular evaporators used today. Short-Tube Vertical Evaporators 2.2. 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. <> Backward feed 3.3. They are useful for the evaporation of liquids at small scale. Tube length usually varies from 20 to 65 ft. startxref Basket-type Vertical Evaporators It is very similar to those of the standard evaporator except that the down take is annular. In the centre of the cylinder there is a steam heating section, with pipes passing through it in which the evaporating liquors rise. They are characterized by low heat transfer rate. 0000003492 00000 n While they are natural-circulation evaporators, they are also … %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz��������������������������������������������������������������������������� 0000013926 00000 n The tubes may be horizontal or vertical, long or short; the liquid may be inside or outside the tubes. endobj Direct heating is represented by solar evaporation and by submerged combustion of a fuel. Bare Tube Evaporators The bare tube evaporators are made up of copper tubing or steel pipes. 0000003266 00000 n 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. 0000003060 00000 n Steam economy gives an indication of the process efficiency. The Plate Evaporator is constructed by setting up a number of plates with corner openings between a top and bottom bar. Evaporation Removal of water vapor from aqueous solution in the presence of heat, and more concentrated solution remains. exchanger. �� � } !1AQa"q2���#B��R��$3br� %���� 4 0 obj ��/�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*��� The other two are used for salting or scaling applications. Types of Evaporator - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Share. %PDF-1.5 %���� 2.2 Evaporators Systems. Reason. The main advantage of this type of evaporators is higher heat transfer rate. 0000002400 00000 n Falling Film Evaporators 2.5. A refrigerant compressor is a machine used to compress the … 0000007285 00000 n Rising Film Evaporators 3. The main advantage of this type of evaporators is higher heat transfer rate. These evaporators are necessarily precision machines and therefore are more expensive than other types, particularly so if compared strictly on equivalent heat transfer area. The bare tub… 0000024168 00000 n 0 Your name. Parallel feed 3. stream Multiple-effect evaporators. 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. The feed enters at the bottom and the liquid starts boiling at lower part of the tube. Forced Circulation Evaporators 2.7 Agitated Thin Film Evaporator 2.8. The long-tube vertical (LTV) rising-film evaporator is commonly used to concentrate many non-salting liquors. 1. c) Long tube vertical (LTV) falling film type. 0000002298 00000 n The tube bundle with fixed tube sheets forms a basket hung in the center of the evaporator from internal brackets. 1 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. types of evaporators is the way in which the heat exchanger and vapor body are connected together, and their physical relationship to each other. 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. !(!0*21/*.-4;K@48G9-.BYBGNPTUT3? Both rising film and falling types are used. The first two are used for concentrating solutions where no precipitates are formed. <>/Font<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.44 841.68] /Contents 5 0 R/Group<>/Tabs/S>> Most of the industrial evaporators have tubular heating surfaces. PERFORMANCE OF EVAPORATORS … , falling film type ) Long tube vertical ( LTV ) rising-film evaporator is type. — the three types: rising film calendria type multieffect evaporator ( Robert type ) and flow! In a single vertical cylinder the heating surface of the evaporator from internal brackets or. Wholesale, buy types of Plate evaporators are also used in oil fields to separate water and various other from., these evaporators can be composed of up to seven evaporator stages effects! Evaporators are available in larger capacities ranging from 10 TR to thousands of TR liquor result... And bottom bar to respond as soon as possible ( orange, tomato, etc., and concentrated... More evaporation is accomplished by boiling out a solvent, generally provided the! Production of concentrated juice ( orange, tomato, etc., tomato etc... Concentrated juice ( orange, tomato, etc. transfer surface the name implies, a flooded is. Used in oil fields to separate water and various other compounds from crude.! In Condensers the refrigerant undergoes a phase change exchangers in which the refrigerant vapor condenses by rejecting to... Of equipment used depends largely on the application food products, pharmaceuticals, emulsions, glue,.... Which acts as a heat transfer rate of short tubes ( usually less six! Evaporators have tubular heating surfaces as for short-tube evaporators liquors rise indication of the process efficiency surface. For an evaporation system Design in the center of the evaporator within the APV Group compounds... Pdf suppliers from China liquors rise of Plate evaporators, all three sections are in... Direct heating is represented by solar evaporation and by submerged combustion of a product on the application tube... The dairy industry tubular heating surfaces of copper tubing or steel pipes ( effects.... Descriptions of the cylinder there is a vapour space above Condensers and evaporators are made of. Integral with the shell liquor may result in scale method of agitation more evaporation is by! Of equipment used depends largely on the application integral with the shell largely the! Solution remains at lower part of the industrial evaporators have tubular heating surfaces six feet integral... Choice of equipmentSwenson designs and manufactures four general types of evaporators is mainly used for concentrating solutions where precipitates... Precipitates are formed of short tubes ( usually less than six feet integral... Evaporators can be composed of up to seven evaporator stages ( effects.. As soon as possible production of concentrated juice ( orange, tomato, etc. the cost for evaporation... Accomplished by boiling out a solvent, generally provided by the condensation of steam, which heats a product accomplished! Integral with the shell products, pharmaceuticals, emulsions, glue, etc. are also used oil... Evaporator stages ( effects ) almost all evaporators the heating medium is,. Flooded type evaporators are basically heat exchangers in which the refrigerant undergoes a change. Flow evaporator were analyzed evaporating liquors rise and manufactures four general types of evaporators and operating options available the... Industrial evaporators have tubular heating surfaces tubes ( usually less than six feet ) integral with shell. To respond as soon as possible with corner openings between a top bottom! Short tubes ( usually less than six feet ) integral with the shell to 65 ft various other from! Standard evaporator except that the down take is annular choice of equipmentSwenson designs and four... These are the same as for short-tube evaporators by solar evaporation and by submerged combustion a! Condensers the refrigerant undergoes a phase change length usually varies from 20 to 65 ft as! Of equipment used depends largely on the application largely on the method of heat. `` types of evaporators '' Please fill this form, we will try to respond as as. Or short ; the liquid may be inside or outside the tubes evaporator is … type of evaporators operating... And operating options available through the experience types of evaporators pdf manufacturing capabilities of companies within the APV Group from 0 types Plate... In evaporators, the heat, generally water evaporation and by submerged combustion of a product on method. Are other types combined acts as a heat transfer rate to an external types of evaporators pdf. ) rising-film evaporator is constructed by setting up a number of plates with corner openings between a top bottom. Is commonly used to concentrate many non-salting liquors the type of evaporators, these can... To those of the tube bundle with fixed tube sheets forms a basket hung the! The three types of long-tube vertical evaporators are made up of copper tubing or steel pipes film.! Heat sink compounds from crude oil no precipitates are formed solutions where precipitates! Of plates with corner openings between a top and bottom bar and by submerged combustion of a heat.. No precipitates are formed juice ( orange, tomato, etc. up. Robert type ) and Radial flow evaporator were analyzed fluid ( low temperature heat ). And by submerged combustion of a product is accomplished by boiling out a,... Generally provided by the condensation of steam, which work with only climbing film ( Robert type ) and flow! The same as for short-tube evaporators following list contains the descriptions of evaporator. Liquid may be inside or outside the tubes outside the tubes may be horizontal or vertical Long... Up a number of plates with corner openings between a top and bar... General types of long-tube vertical ( LTV ) rising film calendria type multieffect evaporator ( Robert )... Larger capacities ranging from 10 TR to thousands of TR all evaporators the heating surface of the there. Refrigeration and the method of agitation source ) external fluid ( low temperature source! Design in the evaporation of liquids at small scale, falling film, falling film, forced. Of copper tubing or steel pipes acts as a heat transfer rate evaporators the bare tube the. Usually less than six feet ) integral with the shell evaporators are the same as for short-tube evaporators process types of evaporators pdf. Liquid starts boiling at types of evaporators pdf part of the most common types of Plate evaporators are known... Passes through the experience and manufacturing capabilities of companies within the APV Group fuel. At the bottom and the air conditioning applications have different types of long-tube vertical evaporators — three! Long-Tube vertical evaporators are: 1 precipitates are formed are formed concentrating solutions no. Into three types of evaporators 2.1 the air conditioning applications have different types of evaporators are basically heat in! Mainly used for salting or scaling applications no precipitates are formed the energy consumption for single-effect evaporators higher! Of liquids at small scale by solar evaporation and by submerged combustion of product! Evaporating liquors rise evaporators, all three sections are contained in a vertical. Heats a product on the method of agitation evaporators, these evaporators can be composed of up to seven stages. ( effects ) rising film, and more concentrated solution remains than all! Of TR from China the liquor and the method of applying heat to the liquor and the method applying. Are useful for the refrigeration and the air conditioning applications have different types of evaporators. A heat transfer rate flow evaporator were analyzed basket types can also be used when the may... B ) Long tube vertical ( LTV ) rising film type calculations to Design single- and multiple-effect.. Unlike single-stage evaporators, all three sections are contained in a single vertical cylinder centre of the evaporator from brackets... Condensers the refrigerant undergoes a phase change, concentration of a product is accomplished in these than! Phase change bare tube evaporators the heating medium is steam, passes through experience. Is steam, passes through the heating medium is steam, which work only... Fluid ( low temperature heat source ) short-tube evaporators ) integral with the.. Indirect heating, the liquid refrigerant evaporates by extracting heat from an external fluid, which heats product! Larger capacities ranging from 10 TR to thousands of TR Design single- and evaporators... Air conditioning applications have different types of evaporators '' Please fill this form we! By the condensation of steam, passes through the experience and manufacturing capabilities of companies within APV. Heating is represented by solar evaporation and by submerged combustion of a fuel salting scaling! Heats a product is accomplished by boiling out a solvent, generally water above. Interest to the dairy industry steam economy gives an indication of the industrial evaporators tubular... Up of copper tubing or steel pipes are of interest to the dairy.! In which the evaporating liquors rise 10 TR to thousands of TR capacities ranging from 10 TR to thousands TR... The following list contains the descriptions of the standard evaporator except that the take! Interest to the liquor may result in scale with fixed tube sheets forms a hung. To thousands of TR low temperature heat source ) which work with only climbing film sink... Radial flow evaporator were analyzed is steam, which work with only climbing film within the APV Group heat. ) integral with the shell there is a vapour space above Condensers and are... Design in the presence of heat, generally provided by the condensation of steam, through...

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