GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER- VIII (New) EXAMINATION — WINTER 2019
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Subject Code: 2180508 Date: 25/11/2019Subject Name: Solid-Fluid Operations
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| Q.1 (a) Define: (1) filtration (2) clarification (3) cyclone efficiency | 03 |
| (b) Differentiate between constant pressure and constant rate filtration. | 04 |
| (c) Explain float and sink method and differential method with suitable Diagram? --- Content provided by FirstRanker.com --- | 07 |
| Q.2 (a) Define (1) Minimum fluidization velocity (2) filtration (3) Sedimentation | 03 |
| (b) Differentiate between particulate and bubbling fluidization. | 04 |
| (c) Explain the working, construction and application of plate and frame filter press. | 07 |
| OR (c) Explain the working, construction and application of Rotary drum filter. --- Content provided by FirstRanker.com --- | 07 |
| Q.3 (a) Define (1) Froude no (2) swirling (3) Power no | 03 |
| (b) Differentiate between paddle and propeller | 04 |
| (c) Define fluidization. Explain the condition of fluidization with suitable diagram. | 07 |
| OR | |
| Q.3 (a) Define (1) seeding (2) nucleation (3) super saturation in term of crystallization. --- Content provided by FirstRanker.com --- | 03 |
| (b) Differentiate between static mixture and intensive mixture. | 04 |
| (c) What is the precaution required for the selection of agitation? How to scale-up the agitation vessel? | 07 |
| Q.4 (a) Explain the factor affecting crystallization. | 03 |
| (b) Differentiate between cyclone and hydro cyclone. | 04 |
| (c) Explain the drying curve with suitable sketch? --- Content provided by FirstRanker.com --- | 07 |
| OR | |
| Q.4 (a) Define (1) leaching (2) drying (3) fluidization. | 03 |
| (b) Differentiate between packed bed and fluidized bed reactor | 04 |
| (c) Classify the equipments for solid conveying and explain chain conveyer in details. | 07 |
| Q.5 (a) Define and enlist different conveyers. --- Content provided by FirstRanker.com --- | 03 |
| (b) A rotary filter, operating at 0.03 Hz, filters at the rate of 0.0075 m3/s. Operating under the same vacuum and neglecting the resistance of the filter cloth, at what speed must the filter be operated to give a filtration rate of 0.0160 m’/s? | 04 |
| (c) Explain the mechanism and working of moving bed reactor. | 07 |
| OR | |
| Q.5 (a) Write in brief the use of conveyer in chemical industries. | 03 |
| (b) Solid spherical particles of coffee extract from a dryer having a diameter of 400 pm are falling through air at a temperature of 422 K. The density of the particles is 1030 kg/m>. Calculate the terminal settling velocity and the distance of fall in 5 s. The pressure is101.32 kPa. --- Content provided by FirstRanker.com --- Data: p air =0.838 kg/m3, air =2.37*10 ° kgm™! s | 04 |
| (c) Write the application of fluidization in chemical industry. | 07 |
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