Chemical Equipment Design

What are the factors affecting the design of pressure vessels and explain the classification of equipments. 

Explain the importance of code books

Explain the various components of process equipments.

Describe briefly stresses due to static and dynamic loads.

Discuss the temperature effect and economic consideration in design of equipment.

An evaporator drum, 1.7 m ID and 1.9 m height is required for operation at 200 mm Hg and 90°C. Material is stainless steel: 04 Cr 19 Ni9. Design the shell and a suitable head. The vessel will be fully radiographed. 

Discuss the skirt support and bracket support for pressure vessels (with figure).

A pressure vessel is provided with a hemispherical head having a thickness of 15 mm, which includes a corrosion allowance of 1.5 mm The ID of the vessel is 500 mm. The material is IS 2002-1962-I.

i) What maximum pressure will head be able to withstand?

A pressure vessel is provided with a hemispherical head having a thickness of 15 mm, which includes a corrosion allowance of 1.5 mm The ID of the vessel is 500 mm. The material is IS 2002-1962-I.

ii) If the head is to be replaced with a 2 : 1 elliptical head, what will be the required thickness to withstand the same pressure as in (i). Joint efficiency is 85% and the temperature is 80°C. 

A cylindrical tank is to be designed to store 2000 tons of a liquid. The tank will be filled to 90% of its capacity. Due to space restrictions, the diameter of the tank cannot be more than 14 m. Steel plates.of size 6300 x 1860 mm and of different thicknesses are available.

i) Design the shell courses

A cylindrical tank is to be designed to store 2000 tons of a liquid. The tank will be filled to 90% of its capacity Due to space restrictions, the diameter of the tank cannot be more than 14 m. Steel plates.of size 6300x1860 mm and of different thicknesses are available.

ii) It is proposed to use a self supporting roof of 5 mm thickness. Will this be suitable?

Liquid density=800 kg/m³;                             Steel plates: density=7700 kg/m³;

Allowable stress=14 kgf/mm²;                          Young's modulus - 19x10¹⁰ N/m²;

Corrosion allowance=2 mm;                            Welding efficiency = 85%

3500 litre of a liquid is to be processed in an agitator vessel at 1 atm and 30°C. The specific gravity and viscosity of the liquid are 1.1 and 500 Cp. The vessel is to be baffled. ratio of 1 and an agitator speed of 150 rpm are recommended. Standard dished heads are to be used.

i) Size the vessel and estimate the power rating of motor for agitation.

 3500 litre of a liquid is to be processed in an agitator vessel at 1 atm and 30°C. The specific gravity and viscosity of the liquid are 1.1 and 500 Cp. The vessel is to be baffled. ratio of 1 and an agitator speed of 150 rpm are recommended. Standard dished heads are to be used.

ii) Design the shaft. Data: Material : Mild steel, Permissible stress = 550 kg/cm², Yieldstress = 1950 kg/cm²

Write step-by-step procedure to design self supported fall vertical vessel.

8 m³/hr of Benzene liquid is to be pumped to a height of 20 m with a horizontal distance of 40 m using a centrifugal pump. Assuming a pressure loss of 10% in the fittings and values of that of the pipe line losses, Design an optimum pipe diameter. The pump efficiency is 35%, Positive suction head is 2 mcf water, the pressure at delivery has to be 0.5 kgf/cm².