Steam Boiler Automation

  • FEASIBILITY AND COST OF CONVERTING OIL- AND COAL …

    3.1 Boiler Derating when Firing Natural Gas 10 3.2 Boiler Derating for the Original Fuel 11 - Type and size of heat recovery equipment - Flue gas treatment, ash handling and particulate control equipment economizer and convection passes is generally about 55 ft/s for coal, 125Learn More

  • e Condensate & Flue Gas Heat Recovery at '' Condensate

    as pre-heated boiler feedwater. A boiler economizer, installed in the stack, captures heat from flue gases to further boost the incoming water temperature. This twofold heat recovery system substantially reduces costs for natural gas, water and water treatment chemicals while eliminating water discharge problems. BackgroundLearn More

  • Use Feedwater Economizers for Waste Heat Recovery

    A feedwater economizer reduces steam boiler fuel requirements by transferring heat from the flue gas to incoming feedwater. Boiler flue gases are often rejected to the stack at temperatures more than 100°F to 150°F higher than the temperature of the generated steam. Generally, boiler efficiency can be increased by 1% for every 40°F reduction in flue gas temperature. By recovering waste heat, an economizer can …Learn More

  • Effects of installing economizers in boilers used in space

    Jul 01, 1999 · OSTI.GOV Conference: Effects of installing economizers in boilers used in space heating applicationsLearn More

  • Considerations When Selecting a Condensing Economizer

    Dec 17, 2007 · Boilers equipped with condensing economizers can have an overall efficiency that exceeds 90 percent. A condensing economizer can increase overall heat recovery and steam system efficiency by up to 10 percent by reducing the flue gas temperature below its dew point, resulting in improved effectiveness of waste heat recovery.Learn More

  • CWU's Waste Heat Recovery System at the Steam Plant

    In June of 2015, CWU added a condensing economizer (CONDEX system) that captures the waste heat produced from the boilers' flue gases. The recovered heat allows Samuelson and Discovery Hall (261,036 combined square feet) to be heated without burning additional natural gas, resulting in …Learn More

  • Waste heat and water recovery from natural gas boilers

    Compared with the original system, the heat recovery and the water recovery of the optimized one were increased by 3.0–23.8% and 5.1–41.4%, respectively, when the split ratio (flow rate ratio of the regenerating solution and the spraying solution) was varied between 0.8 and 0.2.Learn More

  • ENERGY AUDIT of FULLY CONDENSING BOILER STACK …

    Condensing Economizer Heat Recovery Raise your fuel-to-steam efficiency up to 90%. Our 2-stage condensing economizers save both energy and dollars while reducing environmental impact. C2X Economizer The C2X 2-stage condensing economizer captures heat through both a traditional stack economizer section and a condensing section.Learn More

  • Chapter 14 Boilers - Pearson

    main boiler system. Preheating the water increases boiler system efficiency. This heat exchanger transfers heat from the stack gases to the incoming feedwater. The economizer is usually located close to the stack gas outlet of the boiler. Economizers can be supported from overhead or from the ground.Learn More

  • AVAILABLE AND EMERGING TECHNOLOGIES FOR REDUCING

    Combustion for heat generation begins in the boiler burner system and the heat is transferred to the water in the boiler. The boiler produces steam and hot water for industrial process applications. Many boilers use an economizer to preheat the process water before it is fed to the boiler using waste heat from the exhaust gas.Learn More

  • Recovery of Flue Gas Energy in Heat-Integrated

    Mar 11, 2011 · Recovery of low potential energy of flue gases, mainly from industrial boilers, has become one of the problems of interest in research. In this work, the contact economizer system is used to recover low potential heat from the gas turbine exhaust (flue gas) stream of a heat-integrated gasification combined cycle (IGCC) design of the Elcogas plant adopted from previous studies. The …Learn More

  • ENERGY AUDIT of FULLY CONDENSING BOILER STACK …

    May 12, 2010 · heat recovery project. The waste heat recovered is estimated to displace 300,000 therms of natural gas in the Central Heating Plant. The actual savings will be continuously metered and the Energy Service Company (ESCO) will guarantee a minimum level of savings of 264,000 therms per year. At current rates, this produces aLearn More

  • C1X Economizer - Complete Boiler Room Solutions

    C1X Economizer. CB-8491E. Steam or hot water applications. Single-stage condensing economizer. Saves energy by capturing waste heat. Preheats any cool liquid stream. Boilers up to 2,500 HP. Accommodates all boiler design pressures. The C1X Condensing Economizer saves fuel by preheating virtually any cool liquid stream (makeup water, wash water Learn More

  • Use Feedwater Economizers for Waste Heat Recovery

    recovering waste heat, an economizer can often reduce fuel requirements by 5% to 10% and pay for itself in less than 2 years. The table provides examples of the potential for heat recovery. Example An 80% efficient boiler generates 45,000 pounds per hour (lb/hr) of 150-pounds-per-square-inch-gauge (psig) steam by burning natural gas. Condensate is returned to the boiler and mixed with makeup water to yieldLearn More

  • A review of boiler waste heat recovery technologies in the

    1 day ago · The purpose of waste heat recovery is to improve the boiler efficiency η boiler, and η boiler can be defined based on the higher heating value (HHV) of natural gas, as shown in Eq. (1) (1) η boiler = H H V + Q a,in − Q fg,out H H V + Q a,in where Q a,in is the input heat of air, kJ/Nm³ natural gas; and Q fg,out is the heat loss of Learn More

  • Fuel Utility Incentive Supporting Boiler Heat Recovery Project

    SW Gas – Local Natural Gas Distribution • Initial Investigation – Heat Recovery Project was developed in 2015 – SouthWest Gas •No prescriptive fuel incentive for this type of project Boiler. Economizer. Existing Heat Recovery. During Day. New Heat Recovery ~140ºF. 16. Product Heat Recovery SystemLearn More

  • Gas Boiler Economizer Condenser

    Increasing Natural Gas Boiler Efficiency by Capturing . gas. The indirect contact condenser prevents boiler make-up water from contacting the condensate from the flue gas and also allows the flue gas to be cooled below the dew point thereby extracting more heat. A condensing economizer is environmentally favorable because it reduces CO2 emissions.Learn More

  • Energy Tips – Steam

    Boilers equipped with condensing economizers can have an overall efficiency that exceeds 90%. A condensing economizer can increase overall heat recovery and steam system efficiency by up to 10% by reducing the flue gas temperature below its dew point, resulting in improved effectiveness of waste heat recovery.Learn More

  • Consider Installing a Condensing Economizer

    For natural gas-fired boilers, the lowest temperature to which flue gas can be cooled is about 250°F to prevent condensation and possible stack or stack liner corrosion. The condensing economizer improves waste heat recovery by cooling the flue gas below its dew point, which is about 135°F for products of combustion of natural gas.Learn More

  • Boiler Efficiency | How to balance steam loads efficiently

    Aug 26, 2011 · The boiler with an economizer generates 100,000 lb/h of saturated steam at 400 psig using natural gas. At load, the exit gas temperature is 320 °F. Excess air is 15%.Learn More