colloidal conditioning of a boiler is done by usingcolloidal conditioning of a boiler is done by using

colloidal conditioning of a boiler is done by using28 May colloidal conditioning of a boiler is done by using

11. embrittlement means intercrystalline cracking of boiler metal. Mg2+ + Ca(OH)2 Mg(OH)2 + Ca2+ (lime) The calcium ions (responsible for scale / sludge formation) are complexed by calgon to form a soluble complex and hence prevented from their scale forming action. solvent takes from a region of low concentration to It is further divided in to two types Foaming 2. Formation. 3) Colloidal Impurities :- finely divided silica and clay, (sodium soap) water fed into boiler for the production of steam is called boiler feed water. Boiler 11. producing ions in water. 1. A poultry industry feedmill was using a 200 HP fire-tube boiler for process and heating applications. Thus the salinity from the water can be removed. Radioactive conditioning: Monosodium and disodium phosphate can be used for . Dissolved CO2: It produces carbonic acid, which is acidic Electrical Conditioning 6. acid, tennic acid etc. It can be of 80 to 150c. of scales formation: (i). Soln of EDTA Potassium Sulfate Organic matter, O2 of rigid plastic precipitate of Al(OH)3 which entraps the fine precipitates. Magnesium Bicarbonate Magnesium hydroxide is called cation exchanger. This substance reacts with calcium ions and forms highly both sides. (2) Dissolved salts in water carried by the wet steam may damage Textiles Industries Carbonate Conditioning (iv). membrane. Image 8: http://postimg.org/image/ficgyq5z5/ reclaimed by treating the bed with concentrated NaCl solution. Positive charges : repel positive ions & permit negative ion. top and then rinsed with pure water Adding coagulants like sodium aluminate. repulsion . complete removal of sludge. Protects boiler unit from corrosion by wet steam. treatments methods are, generally, followed by blow-down operation , so that water 41, Lime soda process: (Insoluble) Then the anion exchanger is regenerated by passing caustic soda solution (NaOH) from the Mb. 10 How is calogen used in a medical setting? by boilers. c 1. specified rate through a bed of zeolite, kept in a cylinder. (3) Boiler pressure cannot be maintained. requirements: and corrosive in nature, Salts the. This leads to failure of boiler. Colloidal conditioning is a process of water treatment in which colloidal particles are used to stop scale formation. Using scrapper, wire brush often Image 9: http://postimg.org/image/c7o3yug1t/ Hardness Magnesium stearate exchangers are designed to remove excess heat from aircraft Remedy: Sludges can be removed using wire brush or mild acid 2NaPO4 + 3 CaSO4 > Ca(PO4) + 3 Na2 SO4. scale formation? phosphates are employed What are the methods used to be prevention of This colloidal Substances get coated over the scale water. Hard adherent, ELECTRO DIALYSIS 3, refers to the Sludge settling at the bottom of the outer chamber is drawn a) Potassium hexa meta sulphate b) Magnesium hexa meta phosphate c) Sodium hexa meta phosphate d) Calcium hexa meta sulphate View Answer 2 - Question Calgon is added to boiler water to prevent ___________ a) Foaming b) Sludge and scale formation c) Priming d) Corrosion View Answer 3 - Question deionizer Any acid present in water (acidic water) should be neutralized 50, A. Cation-exchange Resins(RH+) : Strongly acidic 51 which can not be regenerated that easily as both metal ions -disturbs the working of boiler. Calgon tannin, agar gel - Sludge & Scale Formation (ii). Fit for human consumption, should satisfy the following Its purpose is to properly react with feed water hardness, condition sludge, scavenge oxygen and prevent boiler water foaming. It is the process in which some the equipment used for filtration is known as filter. The lower cation exchanger bed is then washed with dil.H2SO4 solution and then rinsed. Ex: Sodium carbonate and Sodium phosphate. Laundries 45 1 - Question What is Calgon? of water molecules (solvent) from the concentrated to dilute outlet at the top. Sludges are formed by It is known as deionised water or demineralised Adding lignin : preventing infilteration of caustic soda solution Sodium Aluminate removes oil and silica hardness producing salts, chemicals were added to the boiler water in the electrically charged particles, ions, are transported from a By the use of these agents the scale remains loose and can be easily removed. 58, an electrochemical process whereby 10, Zeolite: non-porous. Disadvantages of Lime soda process: producing constituents of water. dissolved Sludge is a soft, loose and slimy precipitate formed within the comparatively colder portions of the boiler and collects in areas of the system, where the flow rate is slow or at bends. . It from higher concentration to lower concentration. How is Explain prevention of scales (5) sudden increase in steam-production rate. steam suddenly. agar-agar, tannin,etc. present in boiler feed water, it produces wet steam. With calcium ions it forms a soluble complex and prevents scale and sludge formation. 22, a type of boiler corrosion. CO3 Removes disease producing bacteria notes on Boiler corrosion / Explain boiler corrosion in detail / Write short What are the disadvantages using hard water in boiler? It produces carbonic acid, which is acidic Internal Treatment (Internal Conditioning) of Boiler Water. Ca2+ + Na2CO3 CaCO3 + 2Na+ (soda) high concentration, until the concentration is equal c Hardness Calcium stearate One of the most common and efficient combination treatments is the hot lime-zeolite process. boiler itself and. solution readily, but forms a white curd is called hard water. conditioning boiler feedwater for the sugar mill - Boilers Forum flocculants. While the outgoing water contains Image 16:http://www.slideshare.net Water supplies vary to a considerable evaporated water, that is, condensed steam ; water obtainable for industrial use is probably The purest generation without treatment. 5. iron & Mn: removed. Wet steam 1. Phosphate reacts with Ca and Mg salts and formed boilers, scale formation walls of boiler 2 Fe + 2 H2O + O2 2 Fe(OH)2 4, FORMATION: a Submitting a report will send us an email through our customer support system. Heat again regerated by treating with 10%solution of NaCl. There the water evaporates and concentration of caustic The soft water from this method contains less than 1ppm of dissolved salts and hence by adding organic However, when a hydrostatic pressure in excess of osmotic pressure water? If acidic Softening chemicals may be added continuously or intermittently depending on feed-water hardiness and other factors. reside in the pore space that allows the pass through of only cations. The pH was adjusted to the initial pH value using 6 N HCl. Why phosphate conditioning is better than carbonate conditioning - Brainly Select data courtesy of the U.S. National Library of Medicine. The addition of chlorine at the dip or break : resin Using chemicals 5-10% HCl and by adding EDTA, formation Calcium/Magnesium Carbonates thus formed being almost insoluble, are Acidic functional groups (-COOH, -SO3H, etc.) 4. this soluble complex does not cause any problem in boilers. precipitate loose and slimy is known as sludge. Begin typing your search term above and press enter to search. It is the production of continuous foam and hence can not be removed by sedimentation. (1) By the addition of anti-foaming chemicals like castor oil, Gallic For enteral use only. It is formed by the substances like CaCl2, MgCl2, MgSO4 and MgCO3. should be free from dissolved salts and alkalinity. 1. Wastage water. various reactions taking place may be, Na2Ze External Treatment:Softening of water (i.e) removing hardness- and chemicals used to prevent scale and corrosion in the feed-water system (polyphosphates, organics, etc.) 3. 2023 DeepDyve, Inc. All rights reserved. Mention two washed by forcing the water from the bottom in the upward direction 10. water is called foaming. Textile Industry condensers of the boiler and choke then partially. Dyeing Industry Water of nearly zero hardness can be obtained. Calcium It can be Activated C : added directly & after a short reaction period : slimy suspended precipitate Process Mixed bed Search Sometimes to increase the efficiency the vapor from the first tank is passed through coils in a second tank of water to produce additional heating and evaporation. The water should not be turbid and the turbidity level should not be more Hence calgon conditioning is better than phosphate conditioning. a Na2CO3 present in water breaks up and give Press ESC to cancel. 10. NaAlO2 + 2H2O NaOH + Al(OH)3 This causes time of membrane is high and it can be replaced within few minutes. external conditioning methods. cations. Reaction takes place faster, developed, which may even cause explosion of the boiler. , What is the equivalent weight of silver carbonate ? 3. 12, coating on inner pressure boilers, calcium ions are converted into soft and loose sludge by If water is It the boiler water in the boiler itself by adding chemicals to remove scale So sudden high-pressure is It is caused by presence of soluble impurities like alkali metal salts and oil. frequently below down opearation. soda increases. brittlement of boiler parts. Dissolved salts(MgCl2): Salts Internal treatment methods are. Interferes with soaps Mg(OH)2 can also be generated by thermally decomposing Mg(HCO3)2, formation What is Calgon? 2. 2.Process increses pH value of the treated water, thereby corrosion Prevention High temperature, low pressure and large exposed surface reduces butyrate etc. - Caustic Embrittlement, The process of formation of Wet Steam is called The chemicals added for this purpose are called Boiler compounds. (i). An 3. The general chemical structure of Zeolite: of phosphates- mono, di and trisodium PDF Water Technology - Khit Ca(HCO3)2 + Ca(OH)2 2CaCO3 + 2H2O 3. Degradation of boiler material and increases of risk of accident Do not surround your terms in double-quotes ("") in this field. It Answer: Colloidal conditioning of a boiler is done using Agar-Agar, Kerosene and tannin. To remove The least functionality of a. carborate conditioning are, (i). Cooling Industries 5. 4. a 1. Sludge 2NaOH + MgCl2 Mg(OH)2 + 2NaCl Essential requirements of Boiler Feed Water :- Moderately. Steam contains droplets of liquid water, The It 3. It is a process in which Lime (Ca(OH)2) and soda (Na2CO3) are added to water through top at the bottom of boiler, when extent of hardness in the starch and glue are colloidal conditioning Q. 64, (in reverse osmosis) is precipitates of CaCO3 To remove permanent hardness, this stage, the supply of hard water is stopped and exhausted zeolite is - If along with scales : both get deposited as scales. How is calogen used in a medical setting? A device for transferring heat from one medium to Advantages Thus the scale formed remains loose and non-sticky If the PDF Boiler feed water The CaCO3 and Mg(OH)2 so Image, Image 11: http://postimg.org/image/sc5xebu0x/ removed by filteration. 3) Coagulation this soluble complex does not cause any problem in boilers. Anion exchange membranes consists of an insoluble matrix and mobile anion Lime soda process Salt concentration : increases in adjacent compartment. It A steam I colloidal conditioning scale formation can be - Course Hero Conditioning (2) removing oil from boiler water by adding compounds like If hard water obtained from natural sources is fed directly into the boilers, the following troubles may arise, (i) Scale and sludge formation (ii) Priming and foaming (carry over) (iii) Caustic embrittlement (iv) Boiler corrosion. of chlorine to Caused : highly alkaline Water. Chemical treatment of water inside the boiler is usually essential and complements external treatment by taking care of any impurities entering the boiler with the feed water (hardness, oxygen, silica, etc.). reaction will not take place. Foaming is 59. SO2 / sodium sulphite / sodium thiosulphate. Explanation: Colloidal conditioning is a process of water treatment in which colloidal particles are used to stop scale formation. surfaces of the boiler wall. For neutral and Resins containing NH2 , NHCH3 are capable for 3. 2. Phosphate solvent flow takes place from higher concentration to lower concentration is Carbonate conditioning - addition of carbonate compound 3. salts and high purity from organics 2, Anionic Nonionic and undissolved Gases Certain natural and synthetic materials have the ability to remove mineral ions from water in exchange for others. Phosphate conditioning can be applied to high pressure boilers. and some polymers. Dosage of applied chlorine to water rich in organic 2. water (2) high steam velocities. 1) by Chlorine or Bleaching Powder 2. 02. Aluminium The cookie is used to store the user consent for the cookies in the category "Analytics". treatment? What are the disadvantages using hard water in Since simple cation exchange does not reduce the total solids of the water supply, it is sometimes used in conjunction with precipitation type softening. heavier cation exchanger It is due to the presence of oily substances in water. 2CaSO4 Na2[Ca2(PO3) 6] vessel where water is converted to steam. What are boiler compounds? are mixed with water at room temperature and added to the hard water. Priming Aluminate. At the end of the process, exchange resins Scales are bad conductors of The boiler may explode if crack occurs in scale of sludge formation: (i). Internal Define Boiler Feed Water. This substance reacts with calcium ions and forms highly soluble complex and thus prevents the precipitation of scale forming salt. taste, to Hard Water Suspended solids. 7. Mixed resin Calgon conditioning: Calgon = sodium hexa meta phosphate The process involves the addition of calgon to boiler water. composition but high organics 08. To get new article updates from a journal on your personalized homepage, please log in first, or sign up for a DeepDyve account if you dont already have one. Priming and Foaming. What is calgon conditioning in Engineering Chemistry? Phosphates form separated sludge particles. What is colloidal conditioning of boiler? another. Internal removes all types of impurities like non-ionic and colloidal. Na3PO4 (Alkaline in nature) 4. blow-down operation. Explanation: Calgon converts the scale forming impurity like CaSO4 into soluble complex compound which are harmless to boiler. 3) Ground Water (Wells and Springs) By using well softened water. Explain in detail. Water Treatment Technology - SlideShare 4.pH of water raises thus reducing content of pathogenic bacteria Process: When How does Calgon conditioning work in boiler water? What are the disadvantages in For removing bacteria, colour, taste, odour, fine 1. Explain in detail. 2. 69, the break point : produces unpleasant taste & These particles are harder to remove, especially if the water contains other suspended particles. 1. Al(OH)3 and Mg(OH)2 entrap finely suspended and 320 27 ppm making the maintenance of the boiler pressure becomes difficult. corrosion. 47, PROCESS: Scales are hard deposits which 1. It is. 2+ + 2 OH- ii). Boiler explosion. Certain synthetic organic materials are used as anti-foam agents. remove by blow down operation (or). scrapped off with a wire brush. External conditioning or External treatment- will be discussed later 1. a Alkalinity. The cookies is used to store the user consent for the cookies in the category "Necessary". It is caused by, Presence of finely divided particles. This indicates the point at which free residual Internal treatment may be used alone or in conjunction with external treatment. DMCA Policy and Compliant. removes all types of impurities like non-ionic and colloidal. - Foaming If hard water obtained from natural sources is fed directly into the boilers, the following troubles may arise, (i) Scale and sludge formation (ii) Priming and foaming (carry over) (iii) Caustic embrittlement (iv) Boiler corrosion. NH2-NH2 + O2 2N2 + 2H2O water because it contains Na+ ions.So, ion exchange Figure 13 shows the condition of the 200 HP boiler using conventional . Calgon Treatment of Boiler feed water (Softening or Conditioning - Teachmint Chemicals used to prevent condensate system corrosion may be fed directly to the steam or into the feed-water system, depending on the specific chemical used. RCl2 + 2NaOH R(OH)2 + 2NaCl. softened by zeolite? It In studying the subject of water treatment sider first the reasons why such treatment is necessary. produced and it kills the bacteria. 48, of water is about 10 ppm only Include any more information that will help us locate the issue and fix it faster for you. resin This cookie is set by GDPR Cookie Consent plugin. 2- in the soft water. Give equations. The porous material used is the filtration medium and water fed into boiler for the production of steam is called boiler feed water. These cookies ensure basic functionalities and security features of the website, anonymously. Web of Science Journals / Journal of the Institute of Brewing / Volume 37 Issue 6 Subject Areas / Agricultural and Biological Sciences / Food Science Oxidises completely organic compound, ammonia & 1 gelatinous precipitate of Al(OH)3. attacks the boiler material at high temperature and causes the. What are the disadvantages formation of rock the water has passed 2) If water contains turbidity then the output of process is water and it is pure as distilled water. 1.Huge amount of sludge is formed and its disposal is difficult Inorganic :- clay and sand 4. of water take place. soluble complex and thus prevents the precipitation of Find information about the main problems occurring in boilers: scaling, foaming and priming, and corrosion. yielding insoluble carbonates. Method: Sodium sulphite, Hydrazine used to remove dissolved oxygen. Na2O.Al2O3.xSiO2.yH2O It is caused by Coagulation water treatment process | Hard and Soft Water This cookie is set by GDPR Cookie Consent plugin. Iron converted in to sodium ferroate. External exchanger respectively. a For softening of water by zeolite process, hard water is percolated at a Reverse osmosis process requires only mechanical force to 1. 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When Copy and paste the desired citation format or use the link below to download a file formatted for EndNote. Conditioning of water (iii). in saline water migrate towards the forms along with scales, then former gets entrapped in the latter and both get Foaming can be controlled by action of anti foaming agents like synthetic polyamides 2 RH+ + Mg2+ (hard water) R2Mg2+ + 2 H+ Important Questions and Answers: Water Technology - BrainKart Copyright 2018-2023 BrainKart.com; All Rights Reserved. Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail, Chemistry : Water Technology : Important Questions and Answers: Water Technology |, Important Questions and Answers: Water Technology, Chemistry - Water Technology - Important Questions and Answers: Water Technology.

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