Agitated thin film dryer atfd is a very modernized and a dynamic equipment. Dry zones are thus eliminated and the quality of your products is preserved. Agitated thin film dryers atfds are used to produce dry freeflowing powder from slurrysolutiontype feed and widely implemented in pharmaceutical, chemical, and food industries. Applications drying of bulk drugs and intermediates, dyes and pigments, value added food products, clean room applications, possibility of amorphous powders. The typical agitated thin film evaporator consists of a tubular heat transfer area with an external. This precisely agitated thin film dryer has made it conceivable to dry. Agitated thin film dryers atfds are widely used in chemical, pharmaceuticals and food industries to produce dry free flowing powder. The excellent heat exchange produced by the agitation and the thin film yields an immediate evapo ration of the volatile components. Agitated thin film dryer manufacturer and supplier authorstream. Read about company and get contact details and address. Mee,multi effect evaporator,atfd,atfe,agitated thin film. Erection and commissioning of evaporation and agitated thin film dryer. The comparison is carried out for a drying capacity of 500 kg waterh by evaporation.
The feed passes through the atfd in several forms such as solutionslurry and successively becomes paste, wet powder, and dry powder. Thin film dryers are characterized by a mechanically agitated thin product layer inside the dryer fig. Welcome to the world of agitated thin film dryer atfd and other heat transfer equipment. The fed feed will get into contact with the hinged blades attached to the shaft, the high rpm blades shall splash the feed onto the surface. The turbulent flow narrows the spread in residence time distribution. Agitated thin film dryers are used for continuous drying of heat sensitive products with total solvent recovery. Agitated thinfilm dryers atfds are used to produce dry freeflowing powder from. Being one of the trusted firms in the industry, we are highly engaged in providing a unique range of agitated thin film dryer. In the preheating zone the product reaches boiling point. Ketav consultant leads by virtue of superior engineering design capabilities, manufacturing excellence and a project based approach committed to deliver high performance total. Agitated thin film evaporator typically used for fluids which are difficult to handle due to higher sensitivity and viscosity. Rising film evaporator falling film evaporator forced circulation evaporator agitated thin film evaporator short path distillation unit liquidliquid extractor agitated thin film dryer zero discharge systems heat exchangers distillation columns. Flow pattern and heat transfer in agitated thin film dryer. Four pilotscale conductive dryers, namely a vacuum drum dryer vdd, a drum dryer dd, an agitated thin film dryer atfd and a refractance window dryer.
Manufacturer of evaporators plant,mee,multi effect evaporator,atfd,atfe, agitated thin film dryer, agitated thin film evaporator, heat exchanger,zero liquid discharge. The film thickness is normally in the range of less than one up to a few millimetres. Agitated thin flim dryer atfd agitated thin film dryer. Thin film dryers thin film dryers are characterised by a mechanically agitated thin product layer. Designed for product recovery and other severe service applications such as yours, this drying technology arises from over years experience in soap plant glycerin and inorganic salt recovery. Due to its inherent design features, it is ideal for thermal treatment of solutions and heat sensitive products, where reduced operating temperatures and vacuum operating pressures are desirable. Established in the year 2010, kep engineering services private limited is a leading manufacturer and service provider of industrial evaporator, agitated thin film dryer, chemical process equipment, industrial reverse osmosis system, agitated thin film dryer installation services, water treatment plant commissioning services and much more. They consist of a horizontally arranged heated shell with end covers and a rotor with boltedon blades. This shall be used majorly for product layer concentrations.
The permit from tertiary treatment is sent to ro feed tank. Agitated thin film dryer manufacturer of industrial. The rotor blades not only deposit the liquid on the wall, but also promote turbulence in the liquid. Agitated thin film dryer atfd the small holdup in the film reduces residence time to a few seconds. Ofi technical scientific conference istanbul tuesday. The design of agitated thin film dryer atfd is difficult both mechanically and process engineering point of view. Ofi technical scientific conference istanbul tuesday may, 2014. Atfd agitated thin film evaporators manufacturer in india. Economical option against evaporator with dryer for small capacity plants. Our thin film dryers are widely used throughout the process industries to convert liquids, slurries, and pastes to freeflowing solids in continuous, single pass operation.
Film dryer agitated thin film dryer manufacturer from. Dryer feeding equipment drying in the process industry. Lci thin film dryers have a short residence time and are very effective in processing heat sensitive products, due to low holdup and selfcleaning heating surfaces. Agitated thin film evaporatordryer design posted in student. The typical agitated thin film evaporator consists of a tubular heat transfer area with an external heating jacket and a fastrevolving, inner rotor with flexible or rigid. A vertical agitated thin film dryer atfdv has a centrally located rotor having closely fitting blades. The discharge from a dryer is in solid form, generally. It is a process of continuous evaporation whereby the process fluid is pumped into a heated evaporator device which contains rotating internal blades. Agitated thin film dryer atfd vapour vacuum feed steam rotor powder condensate film thin film dryer 3060% 8595% 50 100 flashspray dryer thermal. It is of interest to note that the agitated or wiped. Rising film evaporator in a typical rising film evaporator, the heat. Please help me with the design equations procedures for this.
The reject from ro plant is sent to high tds feed tank and the permit from ro plant is reused in boiler. Normally, the drying process in a vertical thin film dryer consists of a preheating, a slurry and a powder zone. Open the steam to the top and bottom jacket of the dryer and drain the condensate water by opening the bypass valve, after removal of. Evaporators visual encyclopedia of chemical engineering.
Horizontal thin film dryers are continuously operating contact dryers and are used for a broad range of applications under vacuum, atmospheric pressure and overpressure. Liquid is spread on the tube wall by an agitator with rotating blades that cause the liquor to ride along the wall. Request pdf mathematical modeling of agitated thinfilm dryer agitated thinfilm dryers atfds are used to produce dry freeflowing. Agitated thin film dryers atfd have high heat transfer rates and consequent short drying times. Ketav consultant leads by virtue of superior engineering design capabilities, manufacturing excellence and a project based approach committed to to deliver high performance total evaporation solution customized to our client requirement. The liquid is distributed in the form of a thin film on the heated wall where the heat transfer takes place. Agitated thin film dryer manufacturer and supplier atfd is represents evaporation of watersolvents to make concentrated fluid to dry powder or pieces. I have to design an agitated thin film evaporatordryer. Agitated thinfilm drying of spinach juice request pdf. Agitated thin film dryer vertical atfdv vacuum dryer. Reject 10% 5kld to atfd agitated thin film dryer or. Ketav consultant leads by virtue of superior engineering design capabilities, manufacturing excellence and a project based approach committed to deliver high performance total evaporation solution customized to our client requirement. Comprehensive process intensification solutions for the.
Wiped film evaporation wfe and agitated thin film evaporation are synonymous terms. In vertical thin film dryers the wet feed is distributed over the heated wall by a distributing ring and evenly applied to it in a thin film by hinged pendulum. Agitated thin film dryer manufacturer,agitated thin film. The outstanding heat transfer rate for hot solid products enables cooling of large amounts of solids in a compact machine compared to usually used cooling screws and without cooling air.
The feed enters the shell tangentially and gets spread along the inside surface of the shell into a thin film. We present comprehensive variety of agitated thin film dryer that are available in varied sizes and specifications. High heat transfer coefficients short residence time on the heated tube surface. Request pdf agitated thin film drying of spinach juice agitated thin film dryers atfd has been considered as an effective technology for drying viscous liquid foods, pastes or.
Mathematical modeling of agitated thinfilm dryer request pdf. Agitated thin film dryer is consist of cylindrical, vertical body with heating jacket and a rotor inside of the shell which is equipped with rows of pendulum blades all over the length of the dryer. Falling film natural circulation rising film combination types 8 challenging perfection the limits of technological 9 crystallization crystallizers adiabetic vacuum evaporative forced draft tube baffle type spray evaporator crystallizer oslo type atfd agitated thin film dryers heat transfer surface condensers heat exchangers pressure vessels. Required evaporation is achieved in a single pass, avoiding recirculation and. Agitated thin film dryer design is the ideal apparatus for continuous processing of concentrated material for drying. Agitated thin film dryer atfd is the final stage equipment in zero liquid discharge plant. The rotor encapsulated inside the heating shell wipes the fluid film from the walls. The operating pressure in the drying chamber can range from. The artisan rototherm d is a jacketed, horizontal, mechanically agitated dryer designed to continuously remove moisture or solvents from po wders and bulk solids under vacuum especially in applications where long residence times, up to several hours, are required. Being a leading company of vacuum pump manufacturers in mumbai, india, we design and manufacture a wide range of products such as water ring vacuum pumps, industrial vacuum pumps, rotary vacuum pumps, liquid ring vacuum pumps and many other types of pump products. The feed is converted into a thin film, which is intensely agitated due to action of the highspeed rotor. Typ cp dryer purified glycerine dewatering deocolumn condes. Atfd agitated thin film dryers heat transfer surface condensers heat exchangers pressure vessels zero liquid effluent discharge systems caustic concentration systems salt recovery plants.
Unlimited viewing of the articlechapter pdf and any associated supplements and figures. Design and fabrication of agitated thin film dryer ijariie. Our thin film dryers have a short residence time and are very effective in processing heat sensitive products, due to low holdup and selfcleaning heating surfaces. Ketav consultant leads by virtue of superior engineering design capabilities, manufacturing excellence and a project based approach committed to to deliver high performance total evaporation solution customized to our client. Agitated thin film dryer atfd manufacturer in hyderabad. The design process a variety of computerized, manual, thermal and mechanical. The design of agitated thin film dryer atfd is difficult both mechanically and process. Abstractagitated thinfilm drying atfd has been proposed for efficient and mild drying of viscous liquid foods, pastes or pureed foods. Vacuum pump manufacturers in mumbai, india erpl india. The combination of short residence time, high turbulence and rapid surface renewal permits the agitated thin film dryer to handle the heatsensitive, viscous and fouling feed streams successfully.
The key elements of a vertical thin film evaporator are shown here processdesign, mechanicaldesign and physicalproperty parameters must all be taken into account william b. The splashed feed will form a film over the surface of the cylinder and due to the gravity effect, film will slide over the cylindrical vessel. Agitated thin flim dryer atfd agitated thin film dryer atfd. The short residence time allows for efficient and reliable processing of a wide variety of highboiling, heatsensitive andor viscous products. The typical agitated thin film evaporator consists of a tubular heat transfer area with an external heating jacket and a fastrevolving, inner rotor with flexible or rigid wiper elements. These blades force the fluid into a thin film, hence the name, over the inner walls of the evaporator. Atfdagitated thin film dryers chem process systems. The fluid to be handled is spread on the inner wall of the dryer evaporator with the multi armed agitator resulting into a thin film on the walls. Centpro engineering pvt ltd provides pilot plants and agitated thin film dryer atfd to all industries i.
Welcome to the world of agitated thin film dryer atfd and other heat transfer equipments. The driving speed is adapted to the product being handled, its particular specifications and task. Steam jets column reboiler salt, mong, glycerine waste glycerine water. Agitated thin film dryers atfd has been considered as an effective technology for drying viscous liquid foods, pastes or pureed foods. Advantages our falling film evaporation technology is suitable to a wide range of applications with the following advantages. Evaporators with direct heating the use of solar heat for the production of glaubers salt has been described by. In falling film evaporators, the feed liquor is introduced at the top tube sheet, and flows down the tubewall as a thin film. Horizontal thin film dryers are suitable also for applications other than drying like solid particle cooling and product melting. In this study, a labscale atfd was developed and applied. Since the film is moving in the direction of gravity rather than against it, a thinner and fastermoving film results, yielding higher heat. Dec 31, 20 this feature is not available right now. Lci thin film dryers are widely used throughout the process industries to convert liquids, slurries, and pastes to freeflowing solids in continuous, singlepass operation. This is ideal for drying pharmaceuticals, bulk drugs and intermediates, organic and inorganic salts.
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