Recently, Guangdong Province issued a "Boiler Air Pollutants Emission Standards" (DB44 / 765-2019) (hereinafter referred to as the "standard").
A "standard" in the context of the implementation province domain for coal, oil, 65 tons of steam per hour and the material forming steam boiler burning fuel gas and raw, hot water boilers of various capacities and organic heat carrier boiler; stoker of various capacities, stoker furnace.
Second, the implementation of the emission limits of air pollutants specified in Table 1 of the boiler since July 1, 2019, since 2020 July 1 implementation of air pollutant emission limits specified in Table 2.
Third, the new boiler since April 1, 2019 (the date of the present embodiment standard) executed from air pollutants emission limits specified in Table 2.
Fourth, not the implementation of clean energy transformation of 35 tons of steam per hour and higher coal-fired boiler from January 1, 2021, implementation of the provisions of air pollutants emission limits in Table 3 in particular.
Gas-fired, natural gas as a fuel, the heat medium water is heated by the burner, then heat, heating and life, bath with hot water. Now with better production line, a high degree of intelligence boiler, heating speed, low noise pollution, no dust, it is a very suitable for our country's economic environment-friendly hot boiler products.
Large and medium-sized boilers in the power and heat industries have high economic losses due to high operating parameters, and the original boilers are smashed. The social impact is huge. Therefore, the water quality of boiler feed water is particularly high (water quality required for power plant boilers, resistivity) >5 MΩ.CM, SiO2 <20 μg/L). In general power plants and thermal centers, water plants are set up to treat boiler feed water.
How to determine when the components of the gas hot water boiler needs to be replaced a lot of people do not know the life of a gas hot water boiler is generally 10--15 years, but with time in such a long run, which boiler components how to do? Will certainly need to be replaced during certain parts, because they wear out, like the case of damage occurs when the damage reaches a certain extent, the gas heating boiler will be scrapped. But during application, mostly only need to change parts, but how to know whether you need to replace it? Here it said heating surface in its status as a criterion, the circumstances under which needs to be replaced. First, measure the duct changes in the internal gas heating boiler, if a carbon steel pipe, then, once it's expanding crude exceeds 3.5% should replace lost; the steel pipe replacement criteria should be expanding crude exceeds 2.5%, more stringent . Secondly, for high temperature gas heating boiler superheater, the surface oxide if it has more than 0.6-0.7mm, and a deeper grain boundary oxidation cracks, crack depth than the grain size of 3-5, it will be It is considered invalid. Surface gas hot water boiler is found to have visible cracks or other defects in time, we must pay more attention, if such cracks or defects have been unable to repair, it can only replace the entire device. It should be carried out in accordance with the relevant standards for check pipe wall thickness and pipe gas heating boiler, ensuring accurate detection value obtained. About gas hot water boiler economizer tubes, the amount of wear and if it has reached thirty percent of the wall thickness, it is necessary to replace. There will replace Similarly superheater, reheater water wall tube, wall thickness abrasion to reach 25 percent. Timely replace the gas hot water boiler damaged parts, as long as the purpose is to not because they affect the entire boiler heating effect, guaranteed to always maintain a good working condition.
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