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  • (PDF) Boilers and Steam Lines Chemical Cleaning

    Proper chemical cleaning removes deposits from the inside of boiler tubes which improves the boiler heat rate, reduces tube failures and improves the stability of boiler chemistry. publication Get Price

  • Calculating Boiler Chemical Requirements – Water

    Jun 26, 2017 · Assume boiler operates at 10 cycles of concentration, and the residual boiler water alkalinity, M, is 250 ppm. To develop this alkalinity, we need 25 ppm soda ash (as CaCO 3 ) in the feedwater (250 ppm boiler alkalinity divided by 10 concentrations), over and above the amount required to neutralize non-carbonate hardness in the feedwater.Get Price

  • Boiler Chemistry Control and Treatment of Feed Water

    May 05, 2015 · Two types of AVT are; i) AVT (R) Using Ammonia (NH3) and as reducing agent like Hydrazine (N 2 H 4 ), ii) AVT (O) same as AVT ® minus reducing agent i.e. N 2 H 4. Ammonia is commonly used cheaper material to maintain pH in boiler water. N 2 H 4 is used to scavenge Dissolved Oxygen and protect Copper alloys from Ammonia.Get Price

  • Calculation method of excess air ratio for blast furnace

    May 12, 2017 · Taking the performance tests of blast furnace gas fired boiler and natural gas fired boiler as examples, the excess air ratio in the flue gas was calculated according to (1) and (18) respectively. The results show that for the blast furnace gas fired boiler, the calculation result of (1) is significantly lower than that of (18).Get Price


    boiler can be simulated. A real industrial boiler was taken as a reference to build the model. Key words:Simulation, EcosimPro, object-oriented modelling, steam boilers, control systems. 1 INTRODUCTION A steam boiler is a process unit of great importance in all types of industries. An industry'sneed for steam can generally be summarised intoGet Price

  • Rates of Depreciation as Per Income Tax Act, 1961

    Class of assets: Depreciation allowance as percentage of actual cost (a) Plant and Machinery in generating stations including plant foundations :—(i) Hydro-electric3.4 (ii) Steam electric NHRS & Waste heat recovery Boilers/plants7.84 (iii) Diesel electric and Gas plant8.24 (b) Cooling towers and circulating water systems7.84 (c) Hydraulic works forming part of Hydro-electric system …Get Price

  • Useful Life, Depreciation & Resale Value Of ALL Plumbing

    Oct 03, 2019 · The depreciation value of a electric boiler is 7.7% while a gas boiler is 4.8%. Ensure you boiler is in a good working condition before trading them off if you ever plan to. Adding to that, trade them off before the end their useful life. REFRIGERATORSGet Price

  • B&W Learning Center Articles » Babcock & Wilcox

    The example below provides a comparison between two industrial boiler bids where one bidder has a higher price but with a unit that has higher efficiency. Bid 1 guarantees 86.5% efficiency with a price of $10,400,000. Bid 2 guarantees 87.5% efficiency with a price of $11,200,000.Get Price

  • How many years is depreciation for a Boiler? - JustAnswer

    Useful Life, depreciation & resale value of ALL plumbing Get Price

  • State of South Carolina Department of Revenue

    Steam Production X Facility Boiler Equipment Original Cost Depreciation Rate Annual Depreciation Per Study Boiler #1 $16,000,000 (1-15%) / 30 = 2.83%5 $ 452,800 Boiler #2 $18,000,000 (1-20%) / 20 = 4.00% $ 720,000 Step 2: Compute composite depreciation rate Steam Production Composite Composite Annual DepreciationGet Price

  • rate of depreciation on steam boiler – CFBC Boiler

    Income Tax (Machinery and Plant Depreciation Rates) Rules Steam engines, boilers, shafting and mixing and brick-making machines 5%. DEPRECIATION RATES – WEAR & TEAR SCHEDULE. CLASS A (WEAR AND TEAR RATE) 10% .Get Price

  • How to Shut Down a Boiler | Get ChemREADY

    Boiler Aid 385 is a 90% active Ultra-Concentrated All-N-One Tannin/Reducing Agent based Steam Boiler Treatment. Boiler Aid 385 based on world-wide proven tannin & reducing agent chemistries forms a molecular bond with iron to defuse corrosive oxygen from the metal surface. Returning Idle Boilers to ServiceGet Price

  • Boiler Treatment Chemicals Suppliers| B&V Chemicals

    Boiler Treatment Chemicals. The primary objectives in boiler design, operation and effective treatment include: efficiency in heat transfer, minimisation of energy usage, production of pure steam and safe, reliable operation. The problems encountered in steam-raising plant can be severe if scale formation and corrosion are allowed to occur.Get Price

  • Understand the importance of water/steam chemistry

    Jun 30, 2014 · In one case in the early 1980s, operation of an 80 MW, 1,250 psig utility-boiler for three weeks with a condenser leak resulted in severe boiler-tube hydrogen damage. Within a month, tubes began to fail at such a frequent rate that the …Get Price

  • rate of depreciation on steam boiler

    Steam Boiler In India May 23, 2019 May 23, 2019 No Comments on anti-coking olive residue industrial boiler Depreciation Rates • Free Australian Tax Depreciation Rate … Disclaimer: While all the effort has been made to make this service as helpful as possi. Learn MoreGet Price

  • Steam Calculators: Boiler Calculator - Energy

    Mar 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 Price

  • Section 23 52 33 - WATER-TUBE BOILERS - Veterans Affairs

    Operate boiler on each fuel, with economizer (if provided) in service, and record data for at least six evenly spaced steam outputs between low fire start and 100 percent of full steam output, and in the same sequence back to low fire.Get Price

  • 5 Economics of BiomassBoilers | PDF | Boiler | Fuel Oil

    Steam Product Capacity Product Price Operating hour/year Boiler Building Other Utilities Total Unit Price. Biomass Utilities Water Electricity. Palm Shell US$/kg US$/ton US$/kWh. Depreciation Final Book Value Depreciation Method Other Information Interest Rate for Calculation Corporate Tax Number of Worker Labor Cost. ton/hour US$/ton hours US Get Price

  • Answered: A steam boiler is purchased on the… | bartleby

    A steam boiler is purchased on the basis of guaranteed performance. However, initial tests indicate that the operating cost will be P400 more per year than guaranteed. If the expected life is 25 years and money worth 10%, what deduction from the purchase price would compensate the buyer for the additional operating cost?(Get Price

  • Solved A steam boiler has a first cost of $50,000 with a

    Depreciation rate is 20%; Question: A steam boiler has a first cost of $50,000 with a $5000 salvage value and a 10-year depreciation life to determine the boiler's book value at the end of Year 8. Depreciation rate is 20%. This problem has been solved!Get Price

  • Calculating Boiler Chemical Requirements – Water

    Jun 26, 2017 · Assume boiler operates at 10 cycles of concentration, and the residual boiler water alkalinity, M, is 250 ppm. To develop this alkalinity, we need 25 ppm soda ash (as CaCO 3 ) in the feedwater (250 ppm boiler alkalinity divided by 10 concentrations), over and above the amount required to neutralize non-carbonate hardness in the feedwater.Get Price

  • cost estimation of steam power plant – Industrial Boiler

    Mar 04, 2019 · Calculate How To – Department of Energy In most companies, the reported cost of steam is the average cost of generation at a particular production rate. The total operating costs—fuel, power, water, chemical additives, labor, maintenance, depreciation, interest, and administrative overheads—are divided by the total amount of steam produced.Get Price

  • Black water in steam boiler - Boiler and Pressure Vessel

    Jan 19, 2004 · Black, magnetic debris in boiler feedwater loop (e.g. feedwater, boiler water, steam condensate) could be due to too much reducing agent (i.e.oxygen scavenger) as well as low pH. If oxygen is in excess I would expect to see some red-orange debris. Howver, oxygen can not be ruled out as a part of the cause of the black debris.Get Price

  • Water Handbook - Preboiler & Industrial Boiler Corrosion

    quicklime-used at a rate of 6 lb/100 ft³ of boiler volume; silica gel-used at a rate of 17 lb/100 ft³ of boiler volume; activated alumina-used at a rate of 27 lb/100 ft³ of boiler volume; The trays are placed in each drum of a water tube boiler, or on the top flues of a fire-tube unit.Get Price

  • Investigating corrosion memory: The - ScienceDirect

    Feb 01, 2017 · 2.1. Plant description. Two boilers were used for the exposures, one co-firing biomass-fired boiler and one waste-fired boiler. The biomass boiler was a Circulating Fluidized Bed (CFB) boiler with a thermal capacity of 131 MW.The waste-fired boiler was also a CFB boiler with a thermal capacity of 75 MW.Both boilers generate steam for electricity production, …Get Price

  • High-Pressure Steam Cycle and Boiler Water Treatment

    ULTRAMARINESM HP BWT Program • Drew Marine pioneered the "modified phosphate-pH treatment" – Utilizes disodium orthophosphate and caustic so that no "free caustic" is generated in the boiler water – Sodium to phosphate ratio is approximately 2.75:1 and provides margin of safety for good control of the program – Went into effect in the marine industry in the 1960's …Get Price

  • Guidance on Safe Operation of Steam Boilers

    Guidance on the Safe Operation of Steam Boilers (Ref: BG01) is a guidance document intended to assist the designers, managers, operators, maintenance personnel and Competent Persons (CP) of new and existing steam boiler systems in addressing theGet Price

  • clinker formation in boiler agents of thermal power plant

    top 10 reasons behind clinker formation in boiler furnace. 20 Jul 2019 If clinker formation takes place inside the furnace then it causes poor combustion results in the loss of steam pressure and reduced the power generation. A sincere power plant engineer for boiler operation and a panel or.Get Price

  • Analysis of Thermal Power Plant Main Power Equipment

    Mar 13, 2021 · In the paper the steam thermal power plant (TPP) steam boiler and turbine depreciation effect on its efficiency were estimated. The analysis was carried on the real power facility using the developed technique based on the functional relation of equipment life rate and fuel consumption increase on electrical and thermal power output. The TPP technical and …Get Price