3. The effective height of the stack of a power plant is 125 ft. The plant burns 5 ton of lignite (a low-grade coal) per hour; the lignite has a sulfur content of 1.5%. Wind speed is 6 m/sec, and the Pasquill- Gifford stability category may be taken as D. Calculate the rate of chemical emission as follows: Q= (5 ton lignite/hr) (0.015 ton S/1 ton lignite) (907kg S /1 ton S)(1 mol S)/(32 x 10 kg S)(1 mol SO2/ 1mol S) (64g So:/(1mol SO;) a. Estimate vertical and lateral plume dimensions at a distance 500 m downwind, and at a distance 5 km downwind. b. Estimate steady-state SO, concentration in a shopping district 5 km downwind.

3. The effective height of the stack of a power plant is 125 ft. The plant burns 5 ton of lignite (a low-grade coal) per hour; the lignite has a sulfur content of 1.5%. Wind speed is 6 m/sec, and the Pasquill- Gifford stability category may be taken as D. Calculate the rate of chemical emission as follows: Q= (5 ton lignite/hr) (0.015 ton S/1 ton lignite) (907kg S /1 ton S)(1 mol S)/(32 x 10 kg S)(1 mol SO2/ 1mol S) (64g So:/(1mol SO;) a. Estimate vertical and lateral plume dimensions at a distance 500 m downwind, and at a distance 5 km downwind. b. Estimate steady-state SO, concentration in a shopping district 5 km downwind.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

1.25 m head of water is flowing over a 36-m high spillway, hence, the percentage of energy dissipated along the spillway surface, is approximately: 70 % O 45 % O 55 % O 80 % O
Compute the effective stack height of a coal burning power plant with physical stack height of 200 m and stack diameter of 0.8 m, stack gas exit velocity of 18.3 m/sec, temperature of gas 140°C, when the ambient air temperature is 8°C, atmospheric pressure is 1000 millibars and average wind speed is 4.5 m/sec. Also compute the emission rate of sulphur dioxide of the plant assuming burning of 24,000 tonnes of coal per day with a sulphur content of 4.2%.
The air shed over a city can be considered by a completely stirred tank reactor (CSTR) model with two sides of 2×10° m in length and a mixing depth of 500 m. Horizontal wind blows at 4 m/s from one side of the box and exits from the opposite side. Assume that within the box, the air is well mixed all the time. Within the air shed, benzene (C6H6) is emitted by automobiles, power plants, and factories at a rate of 0.4 kg/s. No benzene is brought to the city by wind. When equilibrated, what is the benzene concentration in the atmosphere? Please sketch the model first. Pay attention to the units.
9. Consider the NOx emissions from two rural sources. The second source is located 500 m south and 500 m east of the first source. Source 1 emits 20.5 g/s and has an effective height of 100 m. Source 2 emits 35 g/s and has an effective height of 150 m. Sketch the locations of the stacks and the receptor site. Determine the concentration at a receptor located 4 km east and 200 m south of source one. Atmospheric conditions are neutral with a westerly wind of 5 m/s measured at 10 m.
A paper plant is proposed for a location 1 km upwind from a town. It will emit 40 g/s of hydrogen sulfide, which has an odor threshold of about 0.1 mg/m3. Assume that winds at 10 m above ground are 2.5 m/s, and at the effective stack height they typically vary from 4 – 10 m/s blowing toward the town. If it is summer day with a few broken clouds, What stack height should be used to assure concentrations are no more than 0.1 times the odor threshold at the near edge of town (1 km away)? To be conservative, the stack will be designed assuming no plume rise. Will any buildings (e.g., the country cabin or the doghouse on the far edge of town) experience higher concentrations than a residence at the 1 km boundary? Briefly explain your answer.
A piping system supplies 6000 Ipm of water at 25°C through a DN200 Schedule 40 steel pipe. A butterfly valve is placed on this pipeline to regulate the flow. The expected energy loss through this valve is most likely: 0.31 m 0.49 m 0.38 m O O 0.41 m 0.11 m 0.15 m 0.12 m 22 m 0.09 m
The rate of emission of SO2 from the stack of a power plant is 126.1 g/s. The effective heigth of the stack is 46m. Calculate the SO2 concentration in parts per million at a parking lot located 900 m downwind from the stack on a sunny October day when the wind velocity is 4 m/s. Use class C stability and rural conditions
A new municipal waste combustor burns 300 tons/day of waste and produces 100 dscf of emissions per lb of waste burned. The plant just meets the NSPS emission standards and has an effective stack height of 100 m and is located in a rural area. Under C stability and a windspeed of 4 m/s measured at 10 m, determine Cmax and xmax for (a) PM, (b) Pb in micrograms per cubic meter, and m, respectively
An industrial plant emits lead at 300 g/s from a 50 m high stack at 300°C with a stack velocity of 12 m/s. The stack diameter is 2 m. The wind speed is 5.0 m/s, the air temperature is 10°C, the atmospheric stability class is C, and the atmospheric pressure of 102 kPa. What is the effective stack height?
A rectangular channel of 4 m width conveys water at 2 m³/sec under critical condition. Specific energy for this flow is............
Determine the pollutant removal efficiency (%) in an ideal plug flow reactor having hydraulic detention time τ=5hr for a hazardous chemical having a first-order decay rate constant of k=0.40hr−1. Hydraulic detention time = 5 hours.
A 15 m wide rectangular channel carries a discharge of 30 m³/sec under critical conditions. If the width of the channel is increased to 20 m, then the ratio of specific energy at critical depth for 15 m width to 20 m width will be m. (up to two decimal places)