Introduction to Process Technology (TIPT) January 1 2018 The shell and tube heat exchanger and the function of it.
Why shell and tube heat exchanger is the most common in oil refineries and other large chemical processes. TIPT – Assessment Student Name: Ahmed Said Mohammed Al’ Farsi ID Number: 01931-12 Class: PE1C Module: Introduction to Process Technology (TIPT) Introduction:The industrial processes conductdifferent types of equipment. The collection of equipment called as systemsthat control the process. However, the shell and tube is the most commonequipment that used in industries. The heat exchanger is one of the most importantequipment that the main function of it is to exchange the fluid temperatureinside the process.
As well there are different types of heat exchangers.The different typesof (Heat Exchanger):· Plate heat exchangers.· Plate and shell heat exchanger.· Adiabatic wheel heat exchanger.
· Plate fin heat exchanger.· Pillow plate heat exchanger.· Fluid heat exchangers.· Waste heat recovery units. Theprocess flow diagram: https://lehighcheme.
wordpress.com/2015/04/01/exploring-the-controls-system-on-dow-heat-exchangers/The working principal of equipment: v Shelland Tube heat exchanger: Its device that used to cooling down andheating up the fluid in any process. This heat exchanger has two main bodiesfirst body called shell which is the out cover (shell) and the second body isthe (tubes) which is inside the heat exchanger.
The fluid divide into two waysof flow one goes through the tubes, and another fluid go over the tubes whichmean (through the shell) to exchange heat between the two fluids.v WaterTank:are containers that hold liquids for example, (Water).v Valves:are the mostcommon equipment in every process because the valves are the responsible ofcontrolling the fluid flow rate and the heat inside the process also itscontrol the pressure inside the process.v Pump:equipment thatused to move the fluid from place to another.v ControlSystem: tocontrol the variables inside the process such as the (pressure , temperatureand the flow rate)The shell and tube heat exchanger content the:1- Tubes 2- Shells3- Heads4- Tube sheets5- Baffles6- SupportsTheshell and tube heat exchanger is known as (stationary) equipment.Problem that happened in process: Inone day inside the process industries, a shell and tube heat exchanger wasbeing used to increase the temperature of reactor products.
One day, suddenly,the heat exchanger stopped working. The operators tried to discover the problemthat had led to damage of the equipment.Application and uses of a heat exchanger:v Heatexchangers used to prevent overheating in car engine and increase efficiency ofthe engine itself.v Heatexchangers used in Furnaces and AC.v Heatexchanger used in industries for heat transfer inside the process.
As there are different types of heat exchanger application. Expectation and Propose Solution to fix theproblem:Heatexchanger has power to work among long time for some reasons one of thisreasons is because heat exchanger hasn’t have any rotary parts. However, thereare three types of heat exchanger mistakes (damage problems) that can occur,and it can be prevented by somehow:1. Mechanical2. Chemically induced corrosion3. Combination of mechanical and chemicallyinduced corrosion.-Heatexchanger could be damage due to bad maintaining also.- Mechanical: These disappointmentscan take seven different forms: iron corrosion, vapor or liquid mallet, pulsation,thermal weakness, freeze-up, thermal expansion.
And loss of cooling water.-Chemically Induced Corrosion:These disasters result from the chemical compound interface between thematerials of the heat exchanger and the fluids spread through it. There areseven categories of chemically induced erosion failures but I will mention onlythree of them which are: general corrosion, stress corrosion and galvaniccorrosion.-Combination Mechanical Fiascoand Chemically Induced Corrosion: Most of the damages that heat exchangerreceived it’s from the combination of two conditions. For example, an opposingattack,galvanicattack, and split corrosion attack could occur concurrently atone or more than positions.
Rather often, a mechanical problematicjoining with an erosion problem creates a quicker damage than either oneof them alone. Therearetwo communal kinds of combination motorized and corrosion failures;erosion-corrosion and corrosion-fatigue. Result& Founding: (Solution to fixthis problem):-Maintaining theequipment continuously over years.-Clean up the equipment if it’spossible after each 6 month.-Buy the most common brand andmore efficiency.
-Don’t use it in open areas undersunlight and hot areas.