There is an increasing need to operate power plants at low load for longer periods of time. When a once-through boiler operates at a sufficiently low load, recirculation is introduced, significantly altering the control structure. This paper illustrates the possibilities for using constrained control to obtain optimal load gradients in the recirculation mode. A model predictive controller is de...

The coal industry represents more than half of America’s energy production, and DOE estimates place the recoverable reserve at more than 250 billion short tons. Coal is notorious for its drawbacks, however, including emissions of sulfur (which in the form of sulfur dioxide can react with atmospheric water to form sulfuric acid) and mercury (a known neurotoxicant). Now scientists from the Energy...

In order to reduce the volume fraction of H2S in water wall area four-corner tangential boiler and achieve purpose alleviating high temperature corrosion wall, a thorough test was carried out on 600MW boiler. The results show that under load is obviously more serious than low load, front other walls, furnace downstream burner generally higher walls. Other areas. reason for this phenomenon unifo...

The pilot-scale NOx and SOx simultaneous removal from boiler emission was performed using radical injection and chemical hybrid process. The radical injection is often called as indirect plasma (or remote plasma) and air radicals are produced at room temperature with less than 1/10 of the flue gas flow rate. The flue gas from the boiler was in the range of 450~1,470 Nm/hr, the gas temperature o...

Abstract The goal of the study is to investigate thermal behavior and benefits a cogeneration system based on two gas fired engines storage tank in biomass district heating situated Romania. investigation an hourly analytical model all components: boiler, natural engines, consumers. climatic data location are used as input model. coupled with heat increase flexibility allow production electrici...

Numerical simulations have been conducted to study combustion characteristics of tangentially fired pulverized-coal boiler. A 600 MW coal-fired boiler was used for investigating the effect platen super-heaters on temperature, species distributions and heat transfer. Two furnace models were established, whose difference lies in modelling or not. Results show that is conducive precisely predict (...

Indonesia as an agricultural country, produces products and their waste. To increase the utilization of waste, hence Palm Oil Mill Boiler Ash processed into adsorbent. This research aimed to determine effect contact time on quality adsorption process crude palm oil using adsorbent from Ash. The results showed that optimum at 60 minutes resulted in largest reduction free fatty acids by 2.99% wit...

The research aims to design and construct a new mixed vertical boiler (fire tube – water tube) with three gas passes. strength of this technological innovation is in the best use thermic transmission receiving fluid (hot water, steam, thermal oil), due its multipurpose function steps using alternative fuels (Diesel, Liquid Petroleum Gas LPG, natural gas), by improving efficiency temperature red...