Optimization Of The Heating Model In Beijing

At present in China, heating is still dominated by large coal-fired boilercentralized heating, with gas-fired heating and electric heating as the auxiliary pole.Pollutant emissions of coal-fired boiler is larger, and pollutant of gas-fired boiler islower, but the gas source is unstable, and the price of gas is expensive, so gas-firedheating is difficult to use in large area in the short term. Therefore, this paper studiesthe latest technology of the waste gas treatment, to use the advanced flue gastreatment equipment and its improvement measures, so that the flue gas emissions ofcoal-fired boiler meets the emissions standards for gas-fired boilers. And on this basis,the paper studies three heating technologies of typical reference significance toBeijing heating, from the considerations of energy consumption, waste emission andeconomical characteristics. The three heating technologies are the electric heatingwith electric is from the pit-head power plant by long-distance conveying, the largegas-fired boiler for heating, the heat-supply system based on upon coal-friedheat-power cogeneration plant that meets the emissions standards for gas-fired boilers.In addition, because the CO2emissions has also become one of the standard ofenvironmental effect evaluation system, so this paper also calculates the CO2emissions of three kinds of heating methods, and provides the reference for theenvironmental protection planning.Results of Calculation and research show that, in terms of energy consumption,the energy consumption of the long distance transmission electric for heating is thehighest, the energy consumption of the large gas-fired boiler for centralized heating isthe lowest, and the energy consumption of heat-supply based on the coal-fired heatand power cogeneration is slightly higher than the gas-fired heating; Onenvironmental protection terms, because the paper only consider that different heatingtechnologies have impact on environment of Beijing, so the electric heating is themost environmentally friendly, gas-fired boiler for heating also has a very goodenvironmental protection, pollutant emissions of heat-supply by the coal-fired heatand power cogeneration plant, that meets the emissions standards for gas-fired boilers, is slightly higher than pollutant emissions of gas-fired boiler for heating, but is stillsignificantly lower than pollutant emissions of the ordinary coal-fired boilers, so ithas obvious environmental protection effect; As far as emissions of CO2, CO2emissions caused by electric heating is highest, CO2emissions of gas-fired boiler forcentral heating is lower than CO2emissions of central heat supply of coal-fired heatand power cogeneration plant, lower of about45%. In terms of heating costs, thecoal-fired cogeneration heating method is most appropriate, and coal-fired boilercapacity is bigger, the economic performance is better.To heat-supply of Beijing and the planning of the national municipal heat-supply,the research results of thesis provide a useful frame of reference.