Sludges and scales in boilers
WebbWhat are scales and sludges, how are they formed in boilers? Also discuss the disadvantages of. scales in boilers. Write short notes on (i) Boiler corrosion (ii) Caustic embrittlement (iii) Priming, foaming and carry over (iv) Impurities in water (v) Various conditioning methods for the prevention of scale in boilers. Webb9 sep. 2024 · 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 ( in photo)
Sludges and scales in boilers
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http://www.vikramuniv.ac.in/files/wp-content/uploads/BE_2_Sem_-_Boiler_problems_sludge__scale___sewage_-_Amrita_Shukla-1.pdf Webb21 aug. 2024 · Chemical Cleaning: If the scale formation is extensive in the boiler, then boiler manufacturers can perform chemical cleaning for the removal of scale and …
Webb6 dec. 2024 · Scales are formed by substances like Ca(HCO3),,, , CaSO, and Mg(OH)o., , Table 1.1 Comparison of Scales and Sludges, , , , , , Sludge is a loose, slimy, and non … WebbQuestion 40 : Hard water is unfit for use in boilers for steam raising because. Option-1 : its boiling point is higher. Option-2 : steam is generated at high pressure. Option-3 : it leads to scale formation inside the boiler. Option-4 : water undergoes decomposition into …
Webb14 feb. 2024 · Answer: Disadvantages of Scale & Sludge Formation 1. 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 : … Webb5. Which of the following option is incorrect about the sludges? a) Sludges are soft, loose and slimy precipitate b) They are non-adherent deposits and can be easily removed c) Formed generally at heated portions of the boiler d) Can be removed by blow down operation Answer: c Explanation: Sludges are formed generally at colder portions of the …
WebbStep-by-step solution. Step 1 of 4. The usage of hard water in the boilers causes problems like scale and sludge formation. The continuous evaporation of water in the boiler leads to the gradual increase in concentration of the dissolved salts. The saturation of a solution with respect to the concentration of salt leads to the precipitation of ...
Webbboilers and in due course of time adhere to the metal surface in the form of scales and sludges. When the precipitate formed is soft, slimy and loose, known as sludge and is … heru ofori attaWebbTo avoid scale formation chemicals added to boiler water are c a. Sodium carbonates b. Sodium sulphides c. Sodium phosphates d. Sodium sulphites 64. Increase in temperature of water decreases the solubility of c a. MgSO4 b. Na2SO4 c. CaSO4 1 d. ZnSO4 65. Ill effects of scale formation in boilers are d a. Wastage of fuel b. mayor beaufort westWebbDifference Between Sludge and Scale in Boiler Sludge 1 Due to heating, the salt-containing water will get concentrated and changes into loose and slimy precipitates called sludge. 2 Sludge is not harmful to the boiler. 3 Sludge can be removed from the bottom of the boiler from time to time. 4 Sludge doesn’t cause clogging and corrosion. mayor beaufort scWebbThe saturation of a solution with respect to the concentration of salt leads to the precipitation of the salt on the inner walls of the boiler. The slimy, soft, and loose … mayor beetlejuice lightfootWebbBoiler tubes are exposed to several damaging factors because of their specific utilization conditions. The most important damaging factor in boiler tubes is corrosion. The causes … mayor beame of new york cityWebbBoiler is full of sludges, colour is red. Condensate worsens quality of boiler feed water. Hardness comes to system and and it leads to phosphates sludge creation. Boiler water is thickening or blow-down is too low and sludge stay in boiler. Operation of blow-down does not work sufficiently or automatic blow-down is set up badly. heru ofori-attaWebbSludge- Along with the dissolved solids, there are some suspended solids in the boiler feed water. These suspended solids get precipitated as sludge. Sludge is normally soft in nature compared to scales, but many times sludge gets hardened because of … mayor beetlejuice