These blades force the fluid into a thin film, hence the name, over the inner walls of the evaporator. Comprehensive process intensification solutions for the. Reject 10% 5kld to atfd agitated thin film dryer or. The discharge from a dryer is in solid form, generally. The operating pressure in the drying chamber can range from. Since the film is moving in the direction of gravity rather than against it, a thinner and fastermoving film results, yielding higher heat.
Horizontal thin film dryers are suitable also for applications other than drying like solid particle cooling and product melting. Welcome to the world of agitated thin film dryer atfd and other heat transfer equipments. These products are manufactured using topgrade quality raw material, which is procured from the most reliable and authentic vendors in the market. Required evaporation is achieved in a single pass, avoiding recirculation and. Agitated thin film dryers are used for continuous drying of heat sensitive products with total solvent recovery. Agitated thin film dryer manufacturer and supplier.
The design process a variety of computerized, manual, thermal and mechanical. 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. Agitated thin film dryer manufacturer and supplier atfd is represents evaporation of watersolvents to make concentrated fluid to dry powder or pieces. Agitated thinfilm drying of spinach juice request pdf. Evaporators with direct heating the use of solar heat for the production of glaubers salt has been described by. Manufacturer of evaporators plant,mee,multi effect evaporator,atfd,atfe, agitated thin film dryer, agitated thin film evaporator, heat exchanger,zero liquid discharge. Request pdf mathematical modeling of agitated thinfilm dryer agitated thinfilm dryers atfds are used to produce dry freeflowing. The design of agitated thin film dryer atfd is difficult both mechanically and process engineering point of view. Agitated thin film dryers atfd have high heat transfer rates and consequent short drying times.
The driving speed is adapted to the product being handled, its particular specifications and task. Atfd agitated thin film dryers heat transfer surface condensers heat exchangers pressure vessels zero liquid effluent discharge systems caustic concentration systems salt recovery plants. The rotor encapsulated inside the heating shell wipes the fluid film from the walls. The feed is converted into a thin film, which is intensely agitated due to action of the highspeed rotor. Mathematical modeling of agitated thinfilm dryer request pdf. Thin film evaporator for the highest glycerine yield. The permit from tertiary treatment is sent to ro feed tank. 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. We present comprehensive variety of agitated thin film dryer that are available in varied sizes and specifications. 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. Erection and commissioning of evaporation and agitated thin film dryer.
Agitated thin film dryer atfd is the final stage equipment in zero liquid discharge plant. 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. Agitated thin film dryers atfd has been considered as an effective technology for drying viscous liquid foods, pastes or pureed foods. Ofi technical scientific conference istanbul tuesday may, 2014. This precisely agitated thin film dryer has made it conceivable to dry. Slurries, thick concentrates, viscous materials can be concentrated dried in this equipment. Being one of the trusted firms in the industry, we are highly engaged in providing a unique range of agitated thin film dryer. 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. Read about company and get contact details and address. This is ideal for drying pharmaceuticals, bulk drugs and intermediates, organic and inorganic salts.
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. Steam jets column reboiler salt, mong, glycerine waste glycerine water. Atfdagitated thin film dryers chem process systems. The design of agitated thin film dryer atfd is difficult both mechanically and process. Liquid is spread on the tube wall by an agitator with rotating blades that cause the liquor to ride along the wall. In this study, a labscale atfd was developed and applied. 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,agitated thin film.
Agitated thin film dryer vertical atfdv vacuum dryer. Applications drying of bulk drugs and intermediates, dyes and pigments, value added food products, clean room applications, possibility of amorphous powders. Agitated, thin film general informationequipment design agitated, thin film evaporators, see thin flim dryers, use a heating surface composed of one tube of large diameter that may be either straight or tapered, horizontal or vertical. 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. Normally, the drying process in a vertical thin film dryer consists of a preheating, a slurry and a powder zone. 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. They consist of a horizontally arranged heated shell with end covers and a rotor with boltedon blades. High heat transfer coefficients short residence time on the heated tube surface. 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.
Vacuum pump manufacturers in mumbai, india erpl india. Thin film dryers thin film dryers are characterised by a mechanically agitated thin product layer. In falling film evaporators, the feed liquor is introduced at the top tube sheet, and flows down the tubewall as a thin film. Please help me with the design equations procedures for this. Wiped film evaporation wfe and agitated thin film evaporation are synonymous terms. 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 passes through the atfd in several forms such as solutionslurry and successively becomes paste, wet powder, and dry powder. 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. 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. 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.
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. 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. Dec 31, 20 this feature is not available right now. 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. I have to design an agitated thin film evaporatordryer. The hinged rotor blades keep the film under intense agitation preventing any scale formation. Dry zones are thus eliminated and the quality of your products is preserved. The rotor blades not only deposit the liquid on the wall, but also promote turbulence in the liquid.
Abstractagitated thinfilm drying atfd has been proposed for efficient and mild drying of viscous liquid foods, pastes or pureed foods. Evaporators visual encyclopedia of chemical engineering. The turbulent flow narrows the spread in residence time distribution. The typical agitated thin film evaporator consists of a tubular heat transfer area with an external. Agitated thin film dryer atfd vapour vacuum feed steam rotor powder condensate film thin film dryer 3060% 8595% 50 100 flashspray dryer thermal. Centpro engineering pvt ltd provides pilot plants and agitated thin film dryer atfd to all industries i. Horizontal thin film dryers are continuously operating contact dryers and are used for a broad range of applications under vacuum, atmospheric pressure and overpressure.
Design and fabrication of agitated thin film dryer ijariie. Agitated thin film dryer atfd the small holdup in the film reduces residence time to a few seconds. Ofi technical scientific conference istanbul tuesday. 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. Dryer feeding equipment drying in the process industry. The ro tors mix the product and distribute it as a thin film over the heat transfer surface. Agitated thin film dryer atfd is a very modernized and a dynamic equipment. Agitated thin flim dryer atfd agitated thin film dryer. The feed enters the shell tangentially and gets spread along the inside surface of the shell into a thin film. 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.
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. Agitated thin film evaporatordryer design posted in student. Typ cp dryer purified glycerine dewatering deocolumn condes. 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. Agitated thin film dryer manufacturer of industrial. It is of interest to note that the agitated or wiped. The reject from ro plant is sent to high tds feed tank and the permit from ro plant is reused in boiler. Flow pattern and heat transfer in agitated thin film dryer. Economical option against evaporator with dryer for small capacity plants. Agitated thinfilm dryers atfds are used to produce dry freeflowing powder from. This precisely agitated thin film dryer has made it conceivable to dry item with complete dissolvable recuperation. Atfd agitated thin film evaporators manufacturer in india. The film thickness is normally in the range of less than one up to a few millimetres.
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. Agitated thin film evaporator typically used for fluids which are difficult to handle due to higher sensitivity and viscosity. 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. Agitated thin film dryer design is the ideal apparatus for continuous processing of concentrated material for drying. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. In essence, the pfaudler wiped film evaporator wfe is designed to continuously separate volatile compounds by introducing a mechanically agitated, thin film of feed material to a heated surface. Film dryer agitated thin film dryer manufacturer from.
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. Mee,multi effect evaporator,atfd,atfe,agitated thin film. Lci thin film dryers are widely used throughout the process industries to convert liquids, slurries, and pastes to freeflowing solids in continuous, singlepass operation. 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. 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 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 authorstream. The comparison is carried out for a drying capacity of 500 kg waterh by evaporation.
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. Agitated thin film dryers atfds are widely used in chemical, pharmaceuticals and food industries to produce dry free flowing powder. 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. Agitated thin film dryer atfd manufacturer in hyderabad. This shall be used majorly for product layer concentrations. 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 dryers atfds are used to produce dry freeflowing powder from slurrysolutiontype feed and widely implemented in pharmaceutical, chemical, and food industries. Welcome to the world of agitated thin film dryer atfd and other heat transfer equipment. In the preheating zone the product reaches boiling point. Advantages our falling film evaporation technology is suitable to a wide range of applications with the following advantages. Agitated thin film dryer atfd welcome to the world of agitated thin film dryer atfd and other heat transfer equipments. It is a process of continuous evaporation whereby the process fluid is pumped into a heated evaporator device which contains rotating internal blades. Thin film dryers are characterized by a mechanically agitated thin product layer inside the dryer fig.
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