magnesium. Calgon conditioning: Calgon = sodium hexa meta phosphate The process involves the addition of calgon to boiler water. Which of the following is/are the types of liquid-metal corrosion? Disposal of large amounts of sludge (insoluble precipitate) poses a problem. The hot water or steam under pressure is then usable for transferring the heat to a process. The chemicals convert the scale forming impurities into sludge or . This problem can be solved by adding coagulants like, to the water. Question: Dilution means an increase in the amount of - Amon.In 0% found this document useful, Mark this document as useful, 0% found this document not useful, Mark this document as not useful, : Water is rated to be of greatest importance among the many, essential elements for the existence of human beings, animals and plants. Calgon converts the scale forming impurity like CaSO4 into _____ . It is also used as a coolant in power and chemical plants. A boiler is an enclosed vessel that provides a means for combustion heat to be transferred into water until it becomes heated water or steam. Tri-sodium phosphate Na3PO4 (too alkaline): used for too acidic water. equation x and xi) and removed by filtration. Therefore, if we use hard water in turbines and heat exchangers, their pipes will be, Hard water when used for drinking for long period can lead to stomach, Removal of hardness from water is called water. 12 Application Note Steam generation in power plants, STEAM GENERATION IN POWER PLANTS Application description, In the name of Allah, the most merciful and beneficent. The time for answering the question is over. B. Sludge and scale formation. CAUSTIC EMBRITTLEMENT Caustic embrittlement is a form of corrosion caused by a high concentration of sodium Hydroxide in the boiler feed water. Engineering Chemistry Quiz Online Exam Quiz | Engineering Chemistry areas of Engineering Chemistry for Quizzes, ---- >> Below are the Related Posts of Above Questions :::------>>[MOST IMPORTANT]<, Your email address will not be published. When water is boiled into steam its volume increases about 1,600 times, producing a force that is almost as explosive as gunpowder. Click to reveal Colloidal conditioning The colloidal conditioning agents are kerosene, agar-agar, gelatin, glue, etc. Calgon converts the scale forming impurity likeCaSO4intosoluble complex compound which are harmlesstoboiler. Scale forming salts like CaSO4 is converted into CaCO3, . Explanation: The quantity of calgon to be added to prevent scale and sludge formation is 0.5-5 ppm. The salts responsible for permanent hardness are CaCl, .Permanent hardness cannot be removed by boiling. Do not sell or share my personal information. This causes the boiler to be extremely dangerous equipment that must be treated with utmost care. Na 2[Na 4(PO 3) 6] + 2CaSO 4 Na 2[Ca 2(PO 3) 6 . Calgon is sodium hexa meta phosphate with a. Since the complex is highly soluble there is no problem of sludge disposal. Calgon converts the scale forming impurity like CaSO4 into Is calgon conditioning applicable to low or high pressure boilers or both? : It is due to the presence of bicarbonates of calcium and, magnesium salts. Engineering Chemistry Questions and Answers - Calgon Conditioning. How does Calgon conditioning work in boiler water? It is used in small quantity. You can email the site owner to let them know you were blocked. Composition Na2(Na4 (PO3)6). Calgon is added to boiler water to prevent sludge and scale formation. fields such as production of steel, rayon, paper, textiles, chemicals, and for air-conditioning, drinking. What is calgon conditioning in Engineering Chemistry? Download link for IT 2ndSEM CY6251 Engineering Chemistry 2 Lecture Notes are listed down for students to make perfect utilization and score maximum marks with our study materials. Water treatment describes industrial scale processes to make, a desired use. Unit 4-Water Treatment | PDF | Osmosis | Ion Exchange - Scribd Internal Treatment: 4) Calgon Conditioning : It involves the addition of calgon or sodium hexametaphosphate to boiler water. Explanation: Calgon converts the scale forming impurity like CaSO4 into soluble complex compound which are harmless to boiler. Due to lack of chain entanglement, dendrimers usually have low. What is defined as the concentration of dissolved solute in. On which of the following factors diffusion does not depend? Calgon converts the scale forming impurity like CaSO$_{4}$ into _____ A. Soluble complex compound B. Insoluble complex compound C. Soluble acids What is used for calgon conditioning? Your IP: Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced . Do not sell or share my personal information. Priming may be caused by improper construction of boiler, excessive ratings, or sudden fluctuations in steam demand. Calgon converts the scale forming impurity like CaSO$_{4}$ into Calgon converts the scale forming impurity like CaSO4 into ___________a) Soluble complex compoundb) Insoluble complex compoundc) Soluble acidsd) Insoluble acidsAnswer: aClarification: Calgon converts the scale forming impurity like CaSO4 into soluble complex compound which are harmless to boiler. Calgon Conditioning Specification for potable water as per Bureau of Calgon is Sodium hexa meta phosphate i.e. (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. The colloidal conditioning agents are kerosene, agar-agar, gelatin, glue, etc. Calcium ortho-phosphate appears as loose sludge and thus can be removed by blow-down operation.a) Trueb) FalseAnswer: aClarification: Calcium orthophosphate appears as loose sludge and thus can be removed by blow-down operation. 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They are used in low pressure boilers. (PPT) Unit - I Water Technology | Mr.Eobard Thawne - Academia.edu Calgon conditioning: Calgon = sodium hexa meta phosphate The process involves the addition of calgon to boiler water. When some chemical is mixed with water, _________ is formed. of hardness producing substance, Hard water consumes large amount of soap for washing. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. At higher temperature, calgon converts calcium salts into soluble complexes so they are easily removed. Explanation: Calgon converts the scale forming impurity like CaSO4 into soluble complex compound which are harmless to boiler. This method is used to convert scale to sludge which can be removed by blow-down operation. Advertisement Brainly User Answer: If you continue to use this site we will assume that you are happy with it. 4. Calgon converts the scale forming impurity like CaSO4 into soluble complex compound which are harmless to boiler. 6. This is, also known as non-carbonate or non alkaline hardness. 2NaPO4 + 3 CaSO4 > Ca(PO4) + 3 Na2 SO4. . The quantity of calgon to be added to prevent scale and sludge formation is ___________a) 10-20 ppmb) 30-50 ppmc) 0.005-0.1 ppmd) 0.5-5 ppmAnswer: dClarification: The quantity of calgon to be added to prevent scale and sludge formation is 0.5-5 ppm. Anna University Regulation 2013 Information Technology (IT) CY6251 CHEM 2 Notes for all 5 units are provided below. Na2[Na4(PO3)6]. If you require any other notes/study materials, you can comment in the below section. A boiler is the collector of the boiler systems. The propulsion of water into . Boiler troubles - Scale & sludge formation, Caustic embrittlement, corrosion, priming & foaming, Softening of water (Internal & external treatment-Lime soda, Zeolite, Ion exchange process and, Water is natures most wonderful, abundant and, elements for the existence of human beings, animals and plants (air, water, food, shelter, etc. Cloudflare Ray ID: 7d109ee2deca03c3 A highly soluble complex containing Ca is formed by replacing the sodium ions and thus prevents their formation of scale forming salts like CaSO4. Hence calgon conditioning is better than phosphate conditioning. to boiler water in order to prevent the scale formation. So calgon conditioning is better than phosphate conditioning. that can be precipitated in water treatment. Find molar masses and chemical equivalents of hardness producing substance. 250+ TOP MCQs on Lime Soda Process and Answers, 250+ TOP MCQs on Organic Chemistry Quantitative Analysis and Answers, 300+ TOP Pharmaceutical Inorganic Chemistry MCQs and Answers, 250+ TOP MCQs on Pipette Method and Answers, 250+ TOP MCQs on Electroplating Baths 2 and Answers, 250+ TOP MCQs on Qualitative Analysis of Organic Compounds and Answers, 250+ TOP MCQs on Ion Exchange Process and Answers, 250+ TOP MCQs on Analog Signal Conditioning Bridge Circuits 1 and Answers, 250+ TOP MCQs on Solar Refrigeration and Air-Conditioning Systems 2 and Answers, 250+ TOP MCQs on Soil-Cement Stabilization and Answers, 250+ TOP MCQs on s-Block Elements Important Compounds of Calcium and Answers, 250+ TOP MCQs on Ingredients of Cement and Answers, 250+ TOP MCQs on Problems, Units and Formulae and Answers. The chemical reaction taking place during the cold lime-soda treatment are, very slow and the precipitate which is formed this process is very fine, and is remain in, the solution even after filtration. View Answer 2. Water is a useful and cheap medium for transferring heat to a process. What is the substance, present in a larger quantity that. Semipermeable membrane allows ____________. With calcium ions it forms a soluble complex and prevents scale and sludge formation. It can be easily removed by boiling. Without food, human can survive for a number of days, but water is. Hardness of water is due to the presence of soluble salts of Calcium, Magnesium and other heavier metals. Calgon conditioning: Calgon = sodium hexa meta phosphate The process involves the addition of calgon to boiler . Calgon prevents limescale build-up in washing machines all over the world to protect the heating element, pipes and drum of the machines. What is calgon conditioning why it is used? and form insoluble precipitates of Ca or Mg salts of fatty acids. The hardness of, water is due to presence of calcium and magnesium salts. Calgon converts the scale forming impurity like CaSO 4 into ___________ a) Soluble complex compound b) Insoluble complex compound c) Soluble acids d) Insoluble acids View Answer Calgon is added to boiler water to prevent ___________ a) Foaming b) Sludge and scale formation c) Priming d) Corrosion View Answer 3. To qualify as a colloid, the mixture must be one that does not settle or would take a very long time to settle appreciably. There are three types of phosphates employed for this purpose. 3 - Question Calgon converts the scale forming impurity like CaSO4 into ___________ Calgon conditioning is not applicable for the prevention of ___________a) Iron oxide onlyb) Copper depositions onlyc) Sulphurdioxide onlyd) Iron oxide and copper depositionsAnswer: dClarification: Calgon conditioning is not applicable to the prevention of iron oxide and copper depositions. Bubbles or froth actually build up on the surface of the boiler water and pass out with the steam. In calgon Conditioning, the added calgon forms soluble complex compound with CaSo4, thereby it prevents the scale and sludge formation in water. Calgon conditioning: It is the process of addition of calgon or sodium hexametaphosphate to boiler feed water. What is calgon conditioning why it is used? - AnswersAll Engineering Chemistry Quiz - Sanfoundry Water Treatment Technology - SlideShare Ethylenediaminetetraacetic acid (EDTA), is an amino poly-carboxylic acid and a colorless and a water-soluble solid. Two major types of boiler water treatment are: External water treatment and internal water treatment. since this mode permits the multiplication and division of concentration. PDF B.Tech 1st year By - University of Lucknow When some chemical is mixed with water, _________ is formed. The goal of all water treatment process is to remove existing salts in the, water, or reduce the concentration of such contaminants so that the water becomes fit, The soap consuming capacity of water is known as hardness of water. 92.243.17.49 There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. Water does not give lather with soap, but produces a white scum or precipitate with soap. Hard water can cause "Scaling" inside the pipes which transport water. Caustic embrittlement is a form of corrosion caused by a high concentration of sodium Hydroxide in the boiler feed water. Four good reasons to indulge in cryptocurrency! By using our site, you agree to our collection of information through the use of cookies. The quantity of calgon to be added to prevent scale and sludge formation is ___________ a) 10-20 ppm b) 30-50 ppm c) 0.005-0.1 ppm d) 0.5-5 ppm Answer: d Temporary hardness, (II) Permanent hardness. mass of Ca, is combined with sedimentation with coagulation, lesser amounts, increases the pH value of the treated-water; thereby corrosion of the, For efficient and economical softening, careful operation and skilled supervision. The amount of soda and lime required for the removal of hardness is given by the, where 74, 106 and 100 are the mol. Vinegar is not used for this purpose. Calgon converts the scale forming impurity like CaSO4 into Q: What is the substance, present in a larger quantity that tends to To browse Academia.edu and the wider internet faster and more securely, please take a few seconds toupgrade your browser. The reactions involved in this process are as follows: It is evident from the above equations that when permanent hardness producing, magnesium salts reacted with lime, produces Mg(OH), as a by product(refer eq. Treatment for water softening. calcium and magnesium. Temporary hardness is caused by the presence of dissolved bicarbonates of.
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