Demineralisin Plant Essay

1462 words - 6 pages


EMP. NO.- 900004

There is continuous withdrawal of steam and continuous return of condensate to the boiler, losses due to blowdown and leakages have to be made up to maintain a desired water level in the boiler steam drum. For this, continuous make-up water is added to the boiler water system. Impurities in the raw water input to the plant generally consist of calcium and magnesium salts which impart hardness to the water. Hardness in the make-up water to the boiler will form deposits on the tube water surfaces which will lead to overheating and failure of the tubes. Thus, the salts have to be removed from the water, and that is ...view middle of the document...

■ Raw water contains many dissolved minerals and organic materials.
■ At high temperature certain minerals left scaling on the tube metal of the boiler and cause permanent damage.
■ Some dissolved minerals leads to corrosion of tube metals. Some leads to foaming
■ At high pressure and temperature an element, silica can be carried away with steam causing damage to turbine low pressure stage.
■ The performance and life expectancy of the station greatly depends on water chemistry compliance.
■ A Thermal Power Station needs water of varying quality for different process and hence the requirement.

Different water qualities in use at power plants

■ Boiler feed water…..Conditioned DM water.
■ Condenser cooling…..Raw water/ Clarified & post-chlorinated water
■ Other aux. cooling…..Clarified water.
■ H2 generation plant…..DM water.
■ ESP / Channel flushing…..Raw/ Clarified water.
■ Drinking water…..Filtered & post-chlorinated water.
■ DM plant operation…..Filtered water.

Steps of treatment process

■ Aeration of raw Adding chemicals for bacteria removal
■ Adding chemicals for sedimentation of suspended particles
■ Ion Exchange process
■ Flocculation
■ Filtration

■ Water treatment process is generally made up of two sections :
■ Pretreatment section
■ Demineralisation section

1. Introduction
1.1 Demineralization of Water Using Ion Exchange Resins – Ion Exchange
Natural water contains dissolved salts, which dissociate in water to form charged
particles called ions. These ions are usually present in relatively low concentrations. The
presence of some of these ions leads to problems for applications such as in heating
systems, steam generation etc. and hence are termed as ionic impurities. The commonly
encountered ions in water include the positively charged Cations, namely Calcium,
Magnesium and Sodium. The negatively charged anions include the alkalinity, sulfates,
chlorides and Silica.
Ion Exchange resins are well suited for removal of these impurities for the following
1. Resins have a very high capacity to remove ions in low concentrations.
2. Resins are most stable and can be readily regenerated.
3. Resins are stable over a wide range of temperatures.
4. The process is suitable for both large and small installations.
5. The process is reversible.
Ion Exchange Resins are generally insoluble polymeric materials manufactured using
suspension polymerisation using Styrene and Divinylbenzene (DVB) that carry ion
exchangeable functional groups.
These ions can be exchanged with stoichiometrically equivalent amount of ions of the
same sign. Carriers of exchangeable Cations are called Cation exchangers and that for
anions are called Anion exchangers.
Cation Exchange
Type I Type II
Anion Exchange
Ion Exchange Resins

1.2 Types of ion Exchange resins

Other Papers Like Demineralisin Plant

A Heart Of Darkness Essay

1748 words - 7 pages In this short story, there are frequent significant subject and ideas that make the story, "A Heart of Darkness," by Joseph Conrad, and haunting novel. The main theme is absolute white power over the natives. The theme validates the corruption, and the dependence caused by the white people as they took over the Congo. White men were giving all the power; they had no self-control, and in the end they did not use wisely. The white men became

The Aspects Of Vulnerability Among The Exploited In Medical Research

2287 words - 10 pages Essentially, everyone is in some state of vulnerability. However, some of us are more susceptible to harm due to our vulnerabilities. The susceptible are the individuals with the greatest risk. These individuals risk the loss of their autonomy, and maybe even their lives. Vulnerable populations can be found in every subset of society. However, as previously mentioned, there are some vulnerable populations that are at an even greater risk than

The Hitchhiker’S Guide To The Galaxy

1171 words - 5 pages The Hitchhiker’s Guide to the Galaxy As the human race makes life-changing discoveries, it is made apparent that there is always more to learn as the universe, instead of becoming familiar, is becoming absurd. The Hitchhiker’s Guide to the Galaxy, written by Douglas Adams, as well as the 2005 film adaption, portrays absurdity to be an all-encompassing system in the universe. Through the introduction and attempt to understand lack of reason, the

The Ford Motor Company Wage Increase Of 1914 And The Theory Of Incentives And Efficiency Wages

1252 words - 6 pages ‘It’s not the employer who pays the wages. Employers only handle the money. It is the customer who pays the wages’ (Henry Ford, cited in Johnson and Weinstein 2004, p. 2). When the Ford Motor Company announced that it would more than double the wages of its workers in January 1914 to a ‘five-dollar day’ minimum, was this a contradiction to Henry Ford’s statement? If customers are actually the ultimate payers of wages, then more than

Historical Analysis Of The Economical Breakthroughs Of The Industrial Revolution

1396 words - 6 pages A Historical Analysis of the Economical Breakthroughs of the Industrial Revolution During the Industrial Revolution, many elements of society experienced huge breakthroughs that would change the way they functioned forever. Economics were definitely one of them. With many new inventions and many factories appearing, many, many, more resources were being created than ever before. Also, all of the revenue from these resources was being given to

Leadership Portrayed in Monologue from Shakespeare’s Henry V

1214 words - 5 pages Leadership is defined as a socially constructed process and which also affect organizational future outcomes. Leader is someone at high position who have overall duty for an organization, she or he decide what to do and the way how to achieve it. (Carter and Greer, 2013)The role of leader is extremely important for an organization, leader use their own power to influence the followers though many different ways such as motivation in order to

Cuba Civil Rights

1906 words - 8 pages Picture a country that has limits on how much you can make random government imprisonments and more what do you do. That is the situation for the eleven million seventy-five thousand two hundred forty-four people of Cuba since the takeover of Fidel Castro. The US is opposed to Castro taking control of Cuba. Castro managed to ease the United States nerves when he said that Cuba was against all forms of communism. According to Lana Wylie the Union

US Freight System

1273 words - 6 pages General Environment Each American requires the movement of approximately 40 tons of freight per year across the freight network. This includes everything from shirts to lawn mower to orange juice. • As the U.S. population expands, the U.S. freight system will be called upon to meet the demands of a larger population • Between 2010 and 2035, the system will experience a 22 percent increase in the total amount of tonnage it moves • By 2050, with

Democratic Peace Theory

1852 words - 8 pages Intro: US Presidents have made it a goal during their term(s) in office to establish a good relationship with foreign countries and even try to improve upon existing connections with our allies. Some believe it is to prevent conflicts between the countries while others dispute that it is a threat assessment by the United States to pick and choose their friends and enemies. Preventing conflict between two democracies or countries that practice

Booker T. Washington

1621 words - 7 pages “Success is to be measured not so much by the position that one has reached in life as by the obstacles which he has overcome” –Booker T. Washing. Booker Taliaferro Washington was born in Hale’s Ford, Virginia on April 5th, 1856 to Jane Burroughs and an unknown White man. Washington was married three times. His first wife was Fannie N. Smith from Malden, West Virginia. Booker and Fannie were married in the summer of 1882 and had one child

Corn, Broccoli, Grass Or Balanced

2611 words - 11 pages are plant based are often lacking nutrients such as protein, iron, vitamins, and minerals (Magnesi). It is possible to get these nutrients from other sources and through supplements, but it have to be the right amount. Since too little or too much of these nutrients is perilous to a person’s health, for which it can possibly cause health issues, probably less severe, like feedlot poultry can (Magnesi). This is where the problem start when it

Related Essays

Freedom And Responsibility Essay

2141 words - 9 pages Built within the Constitution of the United States are specifically defined freedoms that are guaranteed to all citizens. Conversely, with every constitutional freedom there comes a corresponding responsibility. On September 25, 1789, the state legislature’s twelve proposed amendments were transmitted by congress, the first two dealing with congressional representation and congressional pay. The following numbers three through twelve were

Hate Crime Laws Essay

2348 words - 10 pages On June 7, 1998, 49-year-old James Byrd Jr. of Texas accepted a ride from three white men, who then beat him severely, urinated on him, chained him by his ankles to the back of their pick-up truck, dragged him for three miles into the countryside, and dumped his corpse in front of an African-American cemetery (Graczyk). A little over a year later, a jury sentenced ring leader John King to death by lethal injection (“Man Executed for Dragging

Rational Emotional Behavior Therapy Case Study Conceptualization And Treatment Plan

2140 words - 9 pages Rational Emotional Behavior Therapy Case Study of Sarah: A Conceptualization and Treatment Plan Rational emotive behavior therapy, REBT, was developed by Albert Ellis and holds the central belief that the events in our lives do not cause our disturbances but that they are instead caused by our view of the events (Murdock, 2009). Murdock (2009) states that “people are seen as responsible for their behavior” (p. 279) but, because they are

Holidays In Albania Essay

1636 words - 7 pages Have you ever thought about having exciting and incredibly cheap vacations? Albania might be the right choice. According to My Travel Guide, Albania is ranked the fourth among ten places worth visiting in Eastern Europe (“Top 10 Eastern European Destinations”). One can encounter three kinds of vacations in this Mediterranean country: winter, summer, and cultural. The ideal places to spend your winter vacations are the Albanian Alps. They are