Difference between scale and sludge Sludge Scale Loose, slim, non-adherent precipitate Hard, thick, strong adherent precipitate Formed by salts like MgSO 4, MgCl 2 Formed by salts like CaSO 4, Ca(HCO 3) 2 Formed on comparatively colder portion of the boiler Formed on comparatively hot portion of the boiler Boiler efficiency decreases to Learn More
Boiler sludge is a deposit that forms when. Differentiate between Sludge & Scale Sludge Scale 1 Due to 1 Foaming is the persistent formation of bubbles or foam in the boiler. 2 Priming is caused by dissolved salts, high steam velocity, sudden heating, improper design. efficiency on large scale steam boilers condensingLearn More
The setup used to produce steam in industries is known as 'Boiler'. Water is fed to the boiler and heated to produce steam. The water fed into the boiler is known as "Boiler feed water". 2. Requirements for boiler water S.No Requirements for boiler water If not, it will cause 1 Free from hardness causing salts Sludge and scaleLearn More
Scale formation and sludge formation in boilers, Chemistry. The sludge are generally form by the substance, which have greater solubility in hot water than cold water. So, sludge is formed in colder parts of boiler. Theories of scale formation 1. View More; Boiler Scales - …Learn More
Jan 16, 2022 · What is the difference between sludge and scale? If the precipitation takes place in the form of loose and slimy precipitate, it is called sludge. On the other hand, if the precipitated matter forms a hard, adhering crust/coating on the inner walls of the boiler, it is called scale. What is sludge What are the disadvantages of sludge formation?Learn More
Sludge and Scale • Sludge: It is a soft, loose and slimy precipitate formed the boiler . Formation of sludge: These are formed by the substances like MgCO 3, MgCl 2,CaCl 2 and MgSO 4 in colder part of boiler because of their less solubility in cold water as compared to hot water. • Scales: These are hard deposits firmly sticking to the Learn More
Difference between Scale and Sludge: Prevention of Boilers (simple methods) The scale formations are mainly due to the presence of salts of Calcium and magnesium ions. Therefore, the scale formation in boilers can be prevented if these metal ions …Learn More
difference between cfb and pulverize coal boiler … Difference between CFB boiler and pulverised coal boil. Our Difference between CFB boiler and pulverised coal boiler manufactured strictly according to national and international standard. our products have approved ASME, IBR, ISO9001-2008, etc All our company's products are factory inspected to ensure the high quality.Learn More
Dec 23, 2019 · Decrease in Efficiency of Boiler : The excessive scale formation may cause clogging of boiler tubes which decreases the efficiency of the boiler. 2. Wastage of Fuel : Scale is a poor conductor of heat. Thus scale formation also decreases the efficiency of the boiler and causes a wastage of fuel. What is difference between scale and sludge?Learn More
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Difference between CFB boiler and pulverised coal boiler For CFB boilers,the combustion of coal takes place at a relatively lower temperature of around 850-900 deg C, necessitating lower thermal insulation of the boiler compared to Pulverised Coal boiler. Technology comparison of CFB versus pulverized-fuel firing ….Learn More
Liming · scale and sludge in a steam boiler â€" Horizontal Gas Boiler Manufacture Brand History. Water 12632 = 29473lb/hr The difference between steam produced and condensate return Scale formation 2.2. Sludge . Scale and sludge formation extent High softening capacity.Difference between hot and cold lime-soda process Cold lime To Learn More
This process is discussed in the article I. Tikhonov «On the issue of sludge and scale formation in a steam boiler» tiwater.info. Then, using the formula (3), we calculate the value of the electrical conductivity of the boiler water, taking into account the sulphates and chlorides.Learn More
Answer (1 of 3): There is a simple difference. In power generation boiler, we use steam to run turbine and due to this electricity or we can say power is generated. Whereas in the boiler use for heating purpose, in this the produced steam is used for heating. In power generation boiler, …Learn More
Dec 22, 2021 · What is the difference between boiler scale and sludge? If the precipitation takes place in the form of loose and slimy precipitate, it is called sludge. On the other hand, if the precipitated matter forms a hard, adhering crust/coating on the inner walls of …Learn More
Scale and sludge formation in boilers As a result, the sludge and scale formation in boiler is prevented. Moreover, this treatment : (1) prevents the deposition of iron oxides in the boiler, (2) reduces the carryover of oxides with steam, and (3) protects the boiler units from corrosion by wet steam (steam containing liquid water). 11.5 CAUSTIC Learn More
If the precipitation takes place in the form of loose and slimy precipitate, it is called sludge. On the other hand, if the precipitated matter forms a hard, adhering crust/coating on the inner walls of the boiler, it is called scale.Learn More
difference between scale and sludge formation in boilers. EC: Lesson 11. Scale and sludge formation in boilers Scale and sludge formation in boilers. In boilers, water evaporates continuously and the concentration of the dissolved salts increases progressively. When their concentrations reach saturation point, they are . Read MoreLearn More
Jun 06, 2015 · Synthetic polyelectrolyte, Natural polyelectrolyte, etc. are used to prevent scale formation. The difference between polymer base and phosphate base boiler compounds is in the function that they prevent the scale formation of hardness components. The preventive mechanism is considered as follows: Inhibit the crystal growth of scale componentsLearn More
Nov 16, 2012 · Difference between scale and sludge in boilers? In boiler when water is heated, if the water is hard then would contain salts. So on heating the water the water particles are evaporated by the Learn More
Feb 08, 2022 · 11 What is the difference between sludge and scum? 12 Whats the difference between scum and sludge? Decrease in Efficiency of Boiler : The excessive scale formation may cause clogging of boiler tubes which decreases the efficiency of the boiler. 2. Wastage of Fuel: Scale is a poor conductor of heat. … Thus scale formation also decreases Learn More
Sludge is the accumulation of solids that precipitate in the bulk boiler water or enter the boiler as suspended solids. Sludge deposits can be hard, dense, and tenacious. When exposed to high heat levels (e.g., when a boiler is drained hot), sludge deposits are often baked in place.Learn More
2. The formation of sulphate, which increases dissolved solids. 3. In HP boilers, sulphite concentratiosn great than 15ppm, the sulphate can break down into SO2 and H2S. Returning to the condensate return line and causing corrosion 4 The formation of sulphate can carry over into the steam, carrying impurities a. 1,2 b. 1,3 c. 2,3 d. 2,4Learn More
Sep 09, 2019 · Answer: Scale and sludge formation in boilers. In boilers, water evaporates continuously and the concentration of the dissolved salts increases progressively. On the other hand, if the precipitated matter forms a hard, adhering crust/coating on the inner walls of the boiler, it is called scale. Difference between scale and sludge.Learn More
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Sludge conditioning in a boiler: To prevent scale formation, _____ is added to the boiler water. a. zeolite b. sodium chloride c. amine d. phosphate. d. b. the electrochemical potential difference between any 2 connected materials must be greater than 0.15V c. If dissimilar metals are used, they must be directly connected to each otherLearn More
EC: Lesson 11. Scale and sludge formation in boilersLearn More
An excessive amount of solids and sludge can insulate the heating surfaces on the waterside of the boiler. The metal overheats and, as a result, the pressure vessel fails. High hardness and dissolved solids concentrations can also lead to carryover of the boiler water into the steam which can cause water hammer and damage piping and equipment.Learn More
A. Boiler corrosion B. conditioning C. scale formation D. sludge formation 39. The Hardness of water is 10 ppm.It can be expressed in degree Clark as [ ] A. 0.0007o Cl B. 0.07o Cl C. 0.7o Cl D. 7.0o Cl 40. Purest form of natural water is [ ]Learn More