The water vapor partial pressure may know, boiler exhaust gas dew point temperature is generally 55 ~ 60 ℃. We reduced by the refrigerant medium (e.g., cold water, cold air, etc.) to a flue gas temperature of flue gas temperature below the dew point, the condensed water vapor in the flue gas can be recovered sensible heat and latent heat of the flue gases at the same time. Calculating the thermal efficiency is low calorie fat conventionally as a reference, is included in the latent heat efficiency of the boiler after steam heat may exceed 100%. And because the water vapor condensation process condensed water may absorb a portion of the harmful gases (e.g., S02, NOx, etc.), reducing the pollutant emissions, environmentally friendly. Per standard cubic meter of combustion gas can be generated in Northern approximately 1.6kg of water, gas boiler fuel consumption of about 0.7MW 80m3 / h, if half of the generated steam is cooled down, may be generated 80 × 1.6 x0.5kg / h = 64kg / h of water, you can see the amount of water available is considerable, if taken measures to make use of this part of the water, the water shortage in some areas will have a positive effect.
In the past few days, customers have been asking why the low-temperature corrosion of oil-fired boilers is more serious than that of coal-fired boilers. In view of this problem, the author discusses this issue with everyone in this paper.
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Gas-fired high efficiency steam boiler residencial blowdown processing techniques which use any boiler blowdown must be, otherwise it will affect the normal operation, slowing the life of the boiler: the definition of sewage: In order to meet the standards of boiler water, impurities in the water must be controlled within a certain range, this requires removal of salt from the boiler, the boiler water higher alkali content and depositing in the bottom of the water, sludge-like precipitate and loose, this process is known as blowdown. Sewage Purpose: Excluding these sediment discharge, will affect the quality of steam, but also the inner wall of the boiler scale build-up, resulting in poor water circulation normal operation, the impact of the boiler. Thus, the formation of impurities to be discharged into the boiler, to ensure that the salt content in the range of the allowable water boiler, which is the object of the sewage. Sewage mode: continuous blowdown also called surface discharge. This sewage uninterrupted manner i.e. the maximum concentration of the boiler water from the boiler water a boiler discharge surface layer, which role is to make the salt content of the water and alkalinity reduction furnace, otherwise, excessive concentration of boiler water steam quality will be affected . Also referred to as sewage regularly or intermittently bottom blowdown discharge is intended to enable the accumulation of slag in the lower portion of the boiler and the precipitate is excluded. Although the duration of each periodic discharge is not long, but it has a strong ability to discharge pot precipitate. 1, the sewage water level in the boiler to be at low load is slightly high vapor pressure and good low load, the boiler water circulating slowly, resulting in easy accumulation of dirt in the drum, the bottom of the collection tank, and the high vapor pressure: Note sewage high blowdown flow, to facilitate the discharge of dirt. Thus, when the boiler blowdown water level should be maintained in order to operate the sewage at around 60%, it must be set when the sewage someone to operate closely monitor changes in the water level to prevent water shortages. 2, the drain valve should open each short intermittently discharge opening quick-closing speed, disturbances caused by dirt slag, thus repeated several times, the precipitate was suction rely possible to quickly meet at outfall, then concentrated discharge. To control the right time, not too long, usually once a sewage must be in the 30s of the time. If the discharge time is too long, the water content of soil furnace will be gradually reduced, so the effect of variation not only sewage, emissions have increased, not only a waste of energy, but also affect the boiler water circulation, and even burst pipe failure may occur. 3, the observation of a given row Expander sewage after the steam outlet, must touch the outfall temperature, and view given row Expander air outlet, in order to determine whether or not to confirm the drain valve is fully closed. Ruoyin debris stuck in the spool of the leak can be re-opened after a rapid close, if the issues shutting the valve wear and difficult, should strengthen surveillance, arrange repair or replacement as soon as possible, at the same time, should be prepared to shift on the record corresponding record, for subsequent inspection.
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Correct me if I am wrong, but I don't think the Gasmaster is a steam boiler. I think it is a condensing modulating water heater, that achieves its high efficiency because the unique design results in a low flue-gas exit temperature. Problem is the tradition of callingRead More
2019-2-4 · Improving Boiler Energy Efficiency Boilers are a part of Chemical Process Industry which is used to produce steam for Process applications and as well as power generation. There are various causes for poor efficiency for Boiler as depicted below in the Cause & Effect diagram Let us see them in detail. Continuous and Intermittent Blow downRead More
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