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⇒ Water at pressure of 4 kg/cm2 and 160°C temperature when exposed to atmosphere will boil flash i.e. get converted into steam remain as it was cool down ⇒ Boiler H.P. is defined as the steam evaporation rate per kg of fuel fired work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
Get priceApr 25, 2010 · = 7.13 kg of air/kg OF COAL If boiler evaporation rate is 2000 kg/hr then required blow down rate is = (2000 X 12.5 )/100 (250 Kg/hr)/3600 = 0.0694 kg/s The amount of energy in each kg of blow down sludge, hf AT 8 kg/cm2 = 720kJ/kg Rate of energy wasted in blow down = …
Get priceIncreasing evaporation rate using convection heat transfer from hot gases. 2. Increasing evaporation rate using radiation. 3. Protecting the refractory walls of the furnace. 4. Increasing water circulation rate. The main reasons for providing water wall enclosures in high pressure boiler furnaces would include: (a) 2 and 3.
Get priceThe application of the 'from and at' rating graph (Figure 3.5.1) is shown in Example 3.5.1, as well as a demonstration of how the values are determined. Example 3.5.1. A boiler has a 'from and at' rating of 2 000 kg/h and operates at 15 bar g. The feedwater temperature is 68°C. The use of Equation 3.5.1 will determine a factor to
Get priceThe performance of a boiler may be measured in terms of its evaporative capacity also called power of a boiler. It is defined as the amount of water evaporated or steam produced in kg per hour. It may also be expressed in kg per kg of fuel burnt or kg/hr/m2 of heating surface. 2.1.1 Boiler Classifications
Get priceFire Tube Boilers: Relatively small steam capacities(12,000 kg/hour). Low to medium steam pressures(18 kg/cm2). Operates with oil, gas or solid fuels. Water Tube Boilers: Used for high steam demand and high pressure requirements. Capacity range of 4,500– 120,000 kg/hour. Combustion efficiency of water tube boiler is enhanced by induced draft
Get priceAug 24, 2016 · Evaporation Ratio, = Heat utilised for steam generation/Heat addition to the steam. 2A.doc – National Certification Examination for Energy Managers … The enthalpy added to steam in the boiler is 580 Kcal/kg. ….. S-6 A boiler generates steam at the rate of 12 ton/hr consuming 2 ton/ hr of coal having 4500 kcal/kg …
Get priceRate of evaporation: 55 to 70 Kg/s . excess to the maximum evaporating rate of boiler. h of fuel oil for a boiler whose steam production ascends to 46 t/h at 17,64 kg/cm2 of effective
Get price(h) Maximum continuous rating (MCR) of a boiler is the maximum evaporation rate that can be sustained for 16 hrs, (i) 1 kg of carbon requires 2.67 kg. of oxygen and produces 3.67 kg. C02. (i) The injector is a simple appliance used to deliver feed water into the boiler using combustion air from FD fan. Marks 10 (B) Write long form of the
Get priceMar 17, 2015 · Steam, Boiler, and Blowdown Pressure are the same. Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used. Blowdown Rate is the % of incoming feedwater mass flow rate that leaves the boiler as a saturated liquid at boiler pressure.
Get priceOil & Gas Fired 2000 kg/hr Horizontal Fire Tube IBR Steam Boiler. ₹ 6 Lakh Get Latest Price. Working Pressure: 10.54-17.54 Kg/cm2. Capacity: 2000 kg/hr. Fuel Type: Oil & Gas Fired.
Get priceI know that My boiler generates steam at rate of 2 T/Hr having pressure of 8 Kg/cm2. Steam Heating Process - Load Calculating - Engineering ToolBox A benefit with steam is the large amount of heat energy that can be transferred.
Get price63. In an oil fired steam boiler the air to fuel ratio is 15:1 & evaporation ratio is 14:1. The flue gas to fuel ratio will be a) 29:1 b) 16:1 c) 14:1 d) 15:1 64. A boiler generates 5 TPH of steam at an efficiency of 78 %. The enthalpy added to steam in the boiler is 580 kcal/kg.
Get priceW = boiler capacity (Btu/h, kW) h g = enthalpy steam (Btu/lb, kJ/kg) h f = enthalpy condensate (Btu/lb, kJ/kg) m = steam evaporated (lb/h, kg/s) Boiler Horsepower - BHP. The Boiler Horsepower (BHP) is. the amount of energy required to produce 34.5 pounds of steam per hour at a pressure and temperature of 0 Psig and 212 o F, with feedwater at 0
Get priceThe coal requirement per kW hour generation in the thermal power plant is of the order of (a) 0.1 to 0.2 kg 31 kg/cm2. Ans: d. 92. Locomotive boiler is of the following type (a) multitubular (b) horizontal (c) internally fired steam evaporation rate per kg of fuel fired (b) work done in evaporating 1 kg of steam per hour from and at 100
Get priceExisting Boiler water TDS = 6000 ppm As per formula: Blowdown = 300 x 100 6000 – 300 = 5.263 For 2.5 TPH capacity boiler = 2.5 x 5.263 100 = 0.131 = 131 litres / hrs = 3157 litres / day Now as per chart 9.5 kg/cm2 At 9.50 kg/cm2 by having 1 inch blowdown valve diameter, we can remove 480 lit / minute.
Get priceFor a mass flow rate of 10 kg/s, determine (a) the rate of heat transfer from the boiler to the water. (b) If the energetic efficiency of the boiler is 80% and the heating value of coal is 32.8 MJ/kg, determine the rate of fuel consumption in tons/hr. (c) What-if scenario: What would the rate of heat transfer be if the boiler pressure were 3 MPa?
Get priceQ. 2 (a) A boiler produces 220 t of dry saturated steam per hour at a pressure 60 kg/crn2 abs. from feed water at a temp 1200 C, Coal consumption = 1200 t/ day, Calorific value of coal = 4200 kcal/kg, 1% coal escapes unburnt. Determine (i) Equivalent evaporation per ton of coal fired (ii) Efficiency of the boiler.
Get price1.6.3 Boiler Efficiency by Direct Method: Calculation and Example Test Data and Calculation Water consumption and coal consumption were measured in a coal-fired boiler at hourly inter-vals. Weighed quantities of coal were fed to the boiler during the trial period. Simultaneously
Get price----- Figure 2 Boiler System Makeup and Discharge Flow Rates 1500- Plant Size MWE 1000- 500- R = 3180 kg Steam/MWH KB~= 0.005 Flash Tank Pressure =2.0 kg/cm2 Boiler Pressure = 170 kg/cnr 0 I 1 I I 5.0 IO.O Flow Rate m^/hr Liquid Effluent From Flash Tank •Makeup Water After Pretreafmerit 15.0 13
Get priceFeb 19, 2021 · 7-What is the standard method or procedure followed for boiler pressure rising during hydraulic tests? Pressure rise is 3.5 kg/cm2 per minute. 8-What will happen if drum safety valves have been set at higher blow down rates? Super heater coils may over heat due to insufficient flow of steam. 8a-What are the reasons for failure of super heater
Get priceMar 17, 2015 · Steam, Boiler, and Blowdown Pressure are the same. Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used. Blowdown Rate is the % of incoming feedwater mass flow rate that leaves the boiler as a saturated liquid at boiler pressure.
Get priceThe flue gases formed per kg of fuel burnt are 23 kg. Neglect the losses and take the diameter of chimney as 1.8 m. Answers: H= 34.67 m, H1 == 29.05 m of air, mg = 39.8 kg/s 3- A boiler generates 2400 kg of dry steam per hour at a pressure of 11 bar the grate area is 3 m2, and 90 kg of coal is burnt per m2 of grate area per hour.
Get priceMar 11, 2015 · What are the two main classification of a stoker fired boiler? 1. Chain grate or travelling grate stoker 2. Spreader stoker 17. Calculate the blow down rate for a boiler with an evaporation rate of 3 tons/hr, if the maximum permissible TDS in boiler water is 3000 ppm and with 10 % make up water addition. The feed water TDS is around 300 ppm.
Get priceApr 26, 2016 · If boiler evaporation rate is 3000 kg/hr then required blow down rate is: tube boilers hot combustion gases flow inside the tubes and water flows outside. In some industrial applications, steam boilers based on renewable energy 1) . Boiler fuels – Energy consumption of industrial boilers accounts for 37% of the Boiler Capacity (MMBtu/hr x 1000).
Get priceFind the efficiency of coal fired boiler by direct method and find its evaporation ratio Type of boiler: Coal fired Boiler - Heat output data Quantity of steam generated (output) : 8 TPH Steam pressure / temperature : 10 kg/cm2(g) / 180 0C Enthalpy of steam(dry & Saturated) at 10 kg/cm2(g) pressure : 665 kCal/kg Feed water temperature : 850 C
Get priceJun 26, 2013 · The fuel and water consumption were 250 litres and 3500 litres respectively. The specific gravity of oil is 0.92. The saturated steam generation pressure is 7 kg/cm2 (g). The boiler feed water temperature is 30°C. Determine the boiler effi- …
Get priceL-4 (a) Calculate the blow down rate for a boiler with an evaporation rate of 10 tons/hr, if the maximum permissible TDS in boiler water is 3500 ppm and with 20 % make up water addition. The feed water TDS is around 350 ppm. (b) Steam at a pressure of 15 kg/cm2g is flashed to a lower pressure of 2 kg/cm2g.
Get priceA boiler delivers 5400 kg of steam per hour at a pressure of 750 kN/m2 and with a dryness fraction of 0.98. The feedwater to the boiler is supplied at a temperature of 41.5 oC. The coal used for firing the boiler has a calorific value of 31000 kJ/kg and is used at the rate of 670 kg/h. Determine the thermal efficiency of the boiler.
Get priceRate of evaporation: 55 to 70 Kg/s . excess to the maximum evaporating rate of boiler. h of fuel oil for a boiler whose steam production ascends to 46 t/h at 17,64 kg/cm2 of effective
Get priceView Mobile Number. Call +91-8048762228. Contact Supplier Request a quote. Coal Fired 2-25 Tph Boilers Ibr Approved ₹ 16 Lakh. Get Quote. Oil & Gas Fired 850 Kg/hr Coil Type Steam Boiler, Non-ibr ₹ 5 Lakh. Get Quote. 500-1000 Kg/hr Steam Boiler Non Ibr ₹ 10 Lakh. Get Quote.
Get priceMar 17, 2015 · Steam, Boiler, and Blowdown Pressure are the same. Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used. Blowdown Rate is the % of incoming feedwater mass flow rate that leaves the boiler as a saturated liquid at boiler pressure.
Get priceApr 26, 2016 · If boiler evaporation rate is 3000 kg/hr then required blow down rate is: tube boilers hot combustion gases flow inside the tubes and water flows outside. In some industrial applications, steam boilers based on renewable energy 1) . Boiler fuels – Energy consumption of industrial boilers accounts for 37% of the Boiler Capacity (MMBtu/hr x 1000).
Get priceMar 17, 2015 · Steam, Boiler, and Blowdown Pressure are the same. Combustion Efficiency is the % of fuel energy that is directly added to the feedwater and not otherwise lost or used. Blowdown Rate is the % of incoming feedwater mass flow rate that leaves the boiler as a saturated liquid at boiler pressure.
Get priceboiler is expressed in square meters. The larger the heating surface a boiler has, the more efficient it becomes. The quantity of the steam produced is indicated in tons of water evap-orated to steam per hour. Maximum continuous rating is …
Get priceThe type of firing used for a pulverised coal fired boiler is: a) over firing b) tangential firing In a plant a boiler is generating a saturated steam of 2 tonnes/hour at a pressure of 7.0 kg/cm2g. Calculate the blow down rate for a boiler with an evaporation rate of 3 tons/hr, if the maximum
Get priceQ = Steam flow rate in kg/hr h = Enthalpy of fed water kcal/kg H = Steam enthalpy in kcal/kg q = fuel firing rate kg/hr GCV = Gross calorific value of fuel, kcal/kg 9. List out any four loss components in a heat balance of a boiler. Ans. a. Dry flue gas loss b. Surface heat loss c. Loss due to incomplete combustion d.
Get priceL-4 (a) Calculate the blow down rate for a boiler with an evaporation rate of 10 tons/hr, if the maximum permissible TDS in boiler water is 3500 ppm and with 20 % make up water addition. The feed water TDS is around 350 ppm. (b) Steam at a pressure of 15 kg/cm2g is flashed to a lower pressure of 2 kg/cm2g.
Get priceMar 11, 2015 · What are the two main classification of a stoker fired boiler? 1. Chain grate or travelling grate stoker 2. Spreader stoker 17. Calculate the blow down rate for a boiler with an evaporation rate of 3 tons/hr, if the maximum permissible TDS in boiler water is 3000 ppm and with 10 % make up water addition. The feed water TDS is around 300 ppm.
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