Then, from the boiler water injection up to the end of the boiler heating stop operation, the total injected boiler softened water is 2950 m 3. The atomic weight of Mg2 is 24 and the atomic weight of Ca 2 is 40. According to the results of water quality tests, the hardness of Mg2 is 2% and the hardness of Ca 2 + is 98%. According to this calculation, the amount of scaling in a heating cycle is as follows: 2950m3x0.03mmol/Lx1000L/m3=88.5mol. The amount of Mg2 is 88.5mol × 2%=1.77mol. The amount of Ca2 is 88.5mol × 98%=86.73mol. These two ions form scale in accordance with the final formation of CaCO3,MgCO3 sediment to simplify the calculation and at the same time explain the problem of boiler scaling.
Recently, the Guangzhou City issued an action "Guangzhou 2018 annual work plan for comprehensive prevention and control of air pollution," the bureau of law enforcement to monitor the detachment on August 28 = 29 organizations launched a special enforcement action against a biomass boiler.
The special enforcement action by the municipal and district levels of environmental protection departments jointly launched, deployed Yuexiu, Tianhe, Haizhu, Huangpu, Conghua five district environmental protection law enforcement backbone, with the Guangzhou City Environmental Protection law enforcement inspection detachment composed of 18 cross-law enforcement group, to increase the city all registration to carry out quality checks of 125 biomass boilers in the book, focus on examination of Guangzhou boiler emissions monitoring system in Zengcheng District registered the existence of complex biomass boilers coal or other high-polluting fuels, whether there are special furnace and supporting bag dust removal facilities, whether the normal operation of the boiler control facilities, whether discharge standards as required entry and update Guangzhou boiler emission monitoring system and other issues.
After verification, the registration system by the city list in the boiler has been disabled (off or relocated) boiler station 43, not included in the other eight found regulatory list table 133 actually inspected. Among them, 28 units involving suspected violations accounted for in the boiler problem with the boiler (90 units) ratio of 31%, the problem of coal-fired boilers in complex 2, the resurgence of firewood, 11, allegedly did not apply for environmental protection procedures, waste gas treatment is not installed facility or facilities are not the normal use and other illegal activities 15. For complex high-polluting coal and wood fuel boiler according to law-site seizure and transfer penalties and territorial environmental protection departments to follow up treatment in accordance with the relevant provisions of Article 107 of the "People's Republic of China Air Pollution Prevention Law." The rest were arrested for illegal transfer of territorial environmental protection departments for investigation.
When the salt content of boiler water is increased to a certain extent, both of these two factors will make the effect of steam separation worse, and a large amount of steam carries water, resulting in a sharp increase of steam salt content.
Factor one is that the working principle of condensing boiler is well known to be different from that of ordinary boiler heating products, and the condensing boiler needs frequent contact with acidic substances such as water vapor in the course of operation. If the material used to produce condensing boiler belongs to the material which is easy to be corroded by acid material, the overall service life of boiler may be reduced.
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