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A number of factors affecting vacuum gas boiler thermal efficiency of domestic basically coal to natural gas in to work, the choice of vacuum gas boiler vigorous, very large to avoid the contamination of dust, smoke the same time the risk of nitrogen oxides and other gases He won the curb. Thermal efficiency is an important measure of the provisions of vacuum gas boiler, behind everyone together to explore a number of factors boiler thermal efficiency of gas under the influence of vacuum. Through the investigation of the persons concerned, vacuum gas boiler heat loss is probably due to it containing the two: combustion air and flue gas emissions than ideal sufficient heat loss. Emission reduction of heat loss to be fitted at the end of the stack waste heat boiler recirculation gas is arranged in vacuo, or in the selection of the more advanced features FGR boiler. Combustion air ratio is not fully resolved over failure: universal gas ejector-type vacuum boiler with burner, the air-fuel ratio can not be caused to be automatically adjusted. Portion of the gas boiler is a mechanical vacuum blower burner, not over the air-fuel ratio factors initiator has the following points: air-fuel ratio over the probability roughly fall into two categories comprising: when the excess air stream, having a limited excess cold is the action of heat, vacuum gas boiler initiation energy increases, the thermal efficiency of the gas boiler reduced in vacuo; non-compliance when the airflow, burning is insufficient happens, vacuum gas boiler thermal efficiency decreased.

What are the advantages slip parameter Henan gas boiler unit? Henan gas boiler and turbine generator and start, while boosting boiler ignition, a low boiler parameters using superheated steam turbine to warm up increases the speed with load. Since the Turbo is warm start parameters steam temperature in the case of changing the vapor pressure and the like. Increases the speed. And a small amount of network and receiving the load, so called sliding start parameters, also called kit or unit is started. Many advantages: (1) start with the machine compared furnace separately, from the start to the unit with a full load, the time required is greatly reduced. Each turbine and boiler start-up time required, Henan gas boiler steam turbine start-up and the time required for the individual. And the time required for the steam turbine startup parameter sliding substantially equal to the time required for a single start, even shorter. (2) Since the parameters of the low initial start Henan gas boiler superheater outlet exhaust steam is used to warm recovered heat increases the speed and working fluid losses and part load, caused by exhaust. (3) warm the pipe warm lower pressure and temperature steam, thermal stress is much smaller than with the higher steam temperatures and pressures warm the pipe warm. (4) started separately, since the initial rise fire, the steam superheater is not cooled, burn-out to prevent overheating, you must limit the amount of fuel entering the gas boiler Henan. And slippery start parameter, starting with a vacuum in the condenser, soon there superheater steam cooling, Stokes speed can be significantly faster. At low pressure, large volume flow in the steam superheater, superheater tubes is not as small as the exhaust flow rate (about 15% to 20% of the rated evaporation), the flow rate variation when thermal image is generated individually activated deviation. (5) Sliding Parameters, Henan gas boiler starts to meet the requirements of the turbine increases the speed of the warm-up, because of the time needed to start a steam turbine is sufficient for the boiler. Adjusting the intensity of combustion boiler can be used (i.e., a control quantity of fuel into the furnace) to control starting conditions. When sliding pressure starting, due to the large volume flow of steam, it is advantageous to improve the water cycle and steam drum wall temperature difference from top to bottom.

This entalphy shown turbine outlet conditions 0,5 bar 85,4 C or 0,2 bar 85 C (vacuum) water must be cooled up to 50 C (inlet of boiler).

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