Calculate the Gross and Net calorific values of a coal having the following compositions, C = 63 %, H2 = 19 %, 02 = 03 %, S =13 % and ash=2.
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A: Given: C = 63% H2 = 19% O2 = 3% S = 13% Ash = 2
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- 1) a)Calculate f and L of a rotary dryer for a kaolin plant to dry 20 tph pressure filtered kaolin containing 22% H2O. Dry kaolin moisture content must not be more than 5% H2O. b)Estimate the energy consumption as kWh and its cost (1 kWh = 14 ¢)70,000 litres of water per day, if the water contains the following impurities: Example 9.33. Calculate the annual cost of slaked lime and soda for treating 100 ррт Mg(HCO), CaSO, MgSO4 SiO, CaCO3 = 280 ppm NaCl %3D 35 ррт 110 ррт %3D = 80 ppm MgCl, = 138 ppm Fe,0, = 55 ppm Purity of slaked lime is 85% and that of soda is 100%. Slaked lime costs 780 per quintal and soda for 400 per quintal. [Atomic weights in gm : Ca = 40, Mg = 24, S = 32, Cl = 35.5, C = 12, 0 = 16, Na = 23, Fe = 56, and Si = 28]. %3D : 40 ррт. %3D %3D4 7 l. V:). A docs.google.com 3. Consider the following with regards to burning of clay bricks. 1. The clay loses its plasticity 2. Carbonate minerals are decarbonated 3. Some of the carbonaceous matter is burnt 4. Clay mass is converted into glass like substance 5. Ferrous iron is oxidized to ferric form. The changes that occur during dehydration period are :* 1, 3, 5 1, 2, 4 O 1, 2, 3 O 2, 4, 5 4. A good soil for making bricks should contain (1) about 20% alumina (2) about 5.7% iron oxides (3) about 18% lime nodules (4) about 15% magnesia Of these statements 1 and 2 are correct 1 and 3 are correct 1, 3 and 4 are correct 2, 3 and 4 are correct
- the value of oil is - 0.8 asap 15 mins5p In the figure, the pipe losses are one and a half times the velocity head at point 2 (1.5v^2/2g.) What is the value of v2? In the figure, the pipe losses are one and a half times the velocity head at point 2 (1.5v₂/2g.) What is the value of v₂? Air: 20 lb /in2 gage Gasoline = 0.68 D = 2 in Water O 76.39 ft/s 37.25 ft/s O 50.7 ft/s 30.5 ft/s 5 ft Fig. 8-6610) Table 1 and Table 2 list the general properties and the production alternatives for various pozzolans. |Table 1 Chemical Composition SiO2, % B D 35 93 35 50 A½O3, % Fe3O2, % Саб, % Physical Property Blaine fineness, m²/kg Color 20 0.4 12 25 0.4 10 25 1.6 40 5 430 Gray 19,000 Gray 400 White 390 Gray Production Method a byproduct of producing silicon metal or ferrosilicon alloys 2 Table 2 a by-product in coal fired power stations formed when molten iron blast furnace slag is rapidly chilled (quenched) by immersion in water A dehydroxylated form of the clay mineral kaolinite 3 For the four pozzolans given in the first column of Table 3, fill the remaining columns with the corresponding letters and numbers: • Column 2 - Determine which one is which pozzolan (from Table 1): (A/B/C/D) • Column 3 - Identify the natural and artificial pozzolans: (N/A) • Column 4 - Determine which ones are self-cementing. Column 5 - Determine the production method (from Table 2): (1/2/3/4) Table 3…
- *: Determine the energy Value of typical municipal solid wastes with the average composition shown in Table below Solution 1. Assume the heating value will be computed on an as-discarded basis. 2. Determine the energy value using a computation table Computation of energy contents Component Solid Wastes Energy Total energy Btu % lb. Btu/lb Food waste 15 2,000 Paper 40 7,200 Cardboard 7,000 Plastics 3 14.000 Textile 2 7,500 Rubber 0.5 10,000 Leather 0.5 7,500 Garden trimming 12 2,800 Wood 8,000 Glass 8 60 Tin cans 6. 300 Non ferrous 1 Ferrous 300 Dirt, Ash,and 4 3,000 brick Ans: 4762Btu/lbYou place a 20 g sample of solid waste in a drying oven overnight and find the mass in the morning (after the moisture has been evaporated) to be 16.2 g. A 1 g (wet) sample is also placed in a 1L water jacket bomb calorimeter and 0.18 g of ash remains in the sample cup after combustion. The temperature in the calorimeter is raised by 2.17 ˚C. Calculate the heat value on a wet weight basis, dry weight basis, and on a moisture and ash-free basis. Convert your values to BTU/lb2. Estimate a solid waste sample's dry-basis and ash-free dry-basis energy content with the following composition. Take ash content as 6%. Component Food waste Paper Cardboard Plastics Garden trimming Wood Tin cans % by mass 20 40 10 10 10 05 05 moisture content (%) 70 06 05 02 60 20 03 Energy (kJ/kg) 4650 16750 16300 32600 6500 18600 700 4
- Derive the CO2emission factor for the coal.You are treating 10 million gallons per day (MGD) of water with alum at a dosage of 50.0 mg/L. Alum is available as a hydrated salt Al2(SO4)3.16H2O. Determine:(a) The monthly alum dosage required in metric tons/month (1 metric ton = 1000 kg)(b) If you assume that each equivalent of alum added to the water consumes 1 equivalent of alkalinity, determine the alkalinity consumed by alum addition in milliequivalents/L (meq/L)(c) Given that the raw water contained 30 mg/L as CaCO3 of alkalinity, is the alkalinity sufficient? What would happen if the alkalinity is inadequate?A water treatment plant is being designed to process 50000m3/day of water. Jar testing indicate that an alum dosage of 40mg/l with flocculation at a Gt value of 2×104 produces optimal results at the expected water temperature of 150c . Determine: ØThe monthly alum requirement for the treatment plant ØVolume of the flocculation basin. ØThe power requirement ØProjected area of paddle blades [Take absolute viscosity at 150c to be 1.139 ×10-3 Ns/m2 (Assume Vp 0.5m/s, CD 1.8) ]