UEMK2411 CHEMICAL ENGINEERING LABORATORY I GROUP 09 2 RESULTS AND CALCULATIONS Part 1: Initial mass of rice / dry sand 0.632 kg mass of tray 0.253 kg amount of water added 0.051 kg The sixth experiment )) The Outsider: A Novel. 3.1 Rotary Dryers Rotary dryers potentially represent the oldest continuous and undoubtedly the most common high volume dryer used in industry, and it has evolved more adaptations of the technology than any other dryer classification. This unit is designed to demonstrate the theoretical and practical aspects of solids drying. The UOP8-MKII drier is now ready to begin the experiment: 1. CCB 3062 Unit Operation Lab II Lab GA Instructor : Mr Sina Experiment : Tray Dryer Date : 3rd March To improve drug compressibility and reduce capping tendencies in crystals. Comments Students also viewed Experiment-02 (ASTM distillation) Experiment-04 (Column tray efficiency) Experiment-05 (Flow through porous media -II) Every effort has been taken to provide detailed examples of the calculations that may be encountered. . The drying constant ranged from 0.009583 h-1 to 0.12666 h-1 under the above drying conditions . Optimum Germination Conditions for Brown Rice Washed brown rice was steeped in soaking solutions of various solutions, using grain-to-solution ratio of 1:2 (w/v) for 5 h at room temperature (302C). - Constant-rate period. We are using single tray dryer, sand as our material, and water. The drying rate was found to increase when wooden skewers were used instead of conventional trays. Moisture content, X; X = , . Spray dryer is used in drying pharmaceuticals like penicillin, blood products, enzymes, vaccines, etc. . Drying Characteristics 1. For evaporating moisture from concentrates or other products from plant operations, Rotary Dryers are designed and constructed for high efficiency and economy in fuel consumption. This study was intended to determine the drying and rehydration kinetics of convective and freeze dried pumpkin slices (0.5 3.5 0.5 cm). Drying data and production costs for a wider range of products are currently The drying-rate curve can be represented by figure shown in slide #19. Warning: TT: undefined function: 32 Vicky Olivier Tray Drying CME 411 Unit Operation Lab II Dr. Dua December 6, 2019. Freeze-dryers can also be grouped by size & use: (1) laboratory bench-top units for R&D (2) pilot units for process development and scale-up, and (3) larger production-sized units. The experimental data were found to fit well with the Page thin-layer drying model. EXAMPLE 7.1. CPB 20104 Mass Transfer 2 UniKL MICET Experiment 2: Tray Dryer full lab report. application. The material to be dried is placed on the tray. dried. The objective of the experiment is to make material balance over tray drier apparatus by the help of psychrometric chart and to determine performance of tray drier by means of moisture content and drying rate curves at different operating conditions. The temperature of the slant frozen sample was -10.4 C and the shell frozen sample was 27.1 C. The heat was increased to +50 C to help drive off additional moisture. Sufficient pumice (or another appropriate drying media) to fill the 3 trays to a depth of 4.5 - 6.5mm (approximately 150-200g of 1.4 - 3mm pumice grit per tray) should submerged and soaked in water (typically ten minutes soaking inwater is a sufficient length of time). The dryer trays are tight-fitting in the cabinet to prevent air from bypassing the material to be dried. conventional dryer of the design used in this experiment would be to recycle some of the air that has already been passed over the product (Barbosa-Cnovas et al. Keywords Dryer, Drying configuration, Energy Efficiency 1. The heat was increased to +60 C and the slant frozen sample continued freeze drying. Air velocity flowing parallel to the material surface was selected to be 0.5, 0.8 and 1.2 m/s. process design calculation of dryers should be defined in accordance with mass and heat transfer principles, process conditions and drying behavior: - Drying characteristics. TrayDryer Report. The drying characteristics of wet solids is best . Tray dryers are used for small-scale production or for pilot-scale work. Drying was. Lab Manual. Spread the mixture evenly in the tray. Sample calculation. . THEORY Drying occurs with the help of evaporation by supplying heat to the wet feedstock. encountered in multi-tray dryers. For vertical airflow batch drying, efficiency is 17%, 18% and 22% respectively at 40C, 50C and 60C. - Moisture content. Repeat Step 6 with the wet sand. In the case of vertical countercurrent airflow drying those efficiency are 34%, 25% and 22%. This past IAP, tests were run on the initial dryer to determine its drying capabilities. 0% plagiarism . Table 5: Data from tray dryer experiment. Next, make similar structures with dry soil and dry sand, for a total of four structures: one made from muddy soil, one dry soil, one wet sand, and one dry sand. A tray dryer is a convectional drying equipment with enclosed insulated chambers and trays placed on top of each other in a trolley. The motor used is 100 W gear motor and the speed is 200 rpm. Below is the procedure for each experiment we have done. 3.3.2 Tray Dryer 59 3.3.3 Blender 59 3.4 Sample Preparing 59 3.4.1 Feed Source 59 . Table 5: Data from tray dryer experiment (cont.) The tray dryer unit used in the experiment was first retrofitted with a PC, a data acquisition card and LabVIEW software. Simulation and mathematical model is done to analyse the safety of the product for operation. Tray Dryer Experiment - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Samples with various dimensions were placed in the tray dryer and dried using various air-drying flow and temperatures. The fourth experiment was set at a high air temperature with a low air speed and exposed surface area. The mixer is driven by a bevel gear with gear ratio of 3. Experiment-07 (Forced draft tray dryer) Name of experiment:-Forced draft tray dryer University Panjab University Course Mass Transfer Lab (PCC-CS 158) Academic year 2021/2022 Helpful? 2) The effect of velocity of air on drying rate of the sample by performing drying process. Control Panel Drying Chamber RESULTS AND CALCULATIONS Part 1: Initial mass of rice / dry sand mass of tray amount of water added total mass (wet sand + trays + holder) Moisture content percentage cross sectional area of trays Axial fan Frequency Heater temperature 0.632 kg 0.253 kg 0.051 kg 0.936 kg 7.467057101 % 0.0752 m^2 8 Hz 65 deg C dryer. Use your battery-operated fan to blow air on the four structures. conclusion. Now that your creations exist, it's time to see which stand up to wind and water. INTRODUCTION Extraction is used to transfer a constituent of a liquid to another liquid (solvent). Prepare the slurry by mixing 500 g of sand and 150 mL of water and load into the experimental tray for the unit. - Diffusion concept. The object of this experiment is to study the basic principles of solid-liquid extraction (leaching) and to perform mass balance to measure the moisture and oil content ofsubstancesby using soxhlet apparatus. Tray drying works well for material that requires more gentle processing or cannot be atomized in an air stream due to viscosity. Tray dryers are the simplest and least-expensive dryer type. Then a 2 k full factorial design and analysis of variance (ANOVA) were used to analyze the operation of the retrofitted dryer by the variation of two parameters: air temperature and velocity. The experimental setup consists of a flat plate solar The dry solid weight is 99.8 kg dry solid and the top surface area for drying is 4.645 m2. experiment was carried out at the same time and same climatic condition. The weights of samples were observed every 3 minutes interval. The driers are used in processes where drying and heating are a crucial part of the industrial manufacturing process such as in the food products, pharmaceutical, dye stuff, and chemicals manufacturing among others. View Lab Report - Tray Dryer Lab Report.pdf from ENGINEERIN CHEMICAL at University of Kuala Lumpur. The mechanical analysis is focused on the tray, support and mixer. The flakes are then pulverized to make powder. Stephen King. 1. These rolls also have a kneading effect which prevents the formation of lumps in sticky products. Introduction OBJECTIVES The purpose of this experiment is to determine the drying rate of the sample by drying method using tray dryer besides learn to use and operate the tray dryer. Q7 A wet solid is to be dried in a tray dryer under steady-state conditions from a free moisture content of X 1 = 0.40 kg H 2O/kg dry solid to X 2 = 0.02 kg H 2O/kg dry solid. The fifth experiment was set at a high air temperature and exposed surface area with a low air speed. The tray dryer consists of an air duct mounted on a frame standing on the floor to provide a comfortable working height for the operator. Transport of water during drying was described by Fick's second law of diffusion and It also reviews canister and fuel assembly designs to determine locations or conditions that could be susceptible for retaining water and should be evaluated in the test plan. The rotary motion is transmitted along 15 mm shaft. Molding the ceramics) step-4) Drying (to maintain the mold shape). This dryer type operates by passing hot air over the surface of a wet solid that is spread over trays arranged in racks. All rotary dryers have the feed materials passing through a rotating cylinder termed a drum. In the second experiment, whole apples were dipped in water at 60C for 10 minutes, afterwards were cut into cubes and coated in alginate, and dried at 40C in the tray dryer, or in a fluidised bed dryer (Armfield, Technical Education, Ringwood Hampshire, UK) with perpendicu-lar air flow at speed of approximately 1 m/s. This type is most widely used in the food and pharmaceutical industries. Most tray dryers are heated by air, which also removes the moist vapors.Technically, drying is a mass transfer process resulting in the removal of water moisture or moisture from another solvent, by evaporation from a solid, semi-solid or liquid to end in a solid state. Janice Ng. A project report submitted in partial fulfilment of the requirements for the award of the degree of . (a) (b) (c) (d) Figure 2: Experimental models of Dryer (a) Model 1 (b) Model 2 (c) & (d) Final model. The second report will be the conceptual test plan itself. assignment: Tray Dryer : explanation . The dryer comes in two types: 1.2.1 The single drum dryer 1.2 Equipment Depending on the design, the product is 2(c)]. Whenever possible to apply heat direct to the material to be dried, Rotary Dryers of the Direct Heating Design are used. Results could then be used to determine appropriate drying techniques for mango processing in Saharan Africa on both sub-local and commercial scales. The Armfield Tray Drier consists of an air controller and temperature controller. Tray dryer is the most common type of dryer generally used in industries where cross-circulation drying occurs. While previously briquettes were laid out in the sun to dry, a solar dryer prototype has been designed and built to help speed up the briquette drying process. The heated batch cocoa bean dryer used in the evaluation was successful in drying thin layer of cocoa bean 5 cm deep at initial moisture content of 79.6 % (db) to 6 % (db), in 4-6 h of continuous drying at the above mentioned temperature range. Study the basic principles of psychrometry and solid drying.

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