After thousands of trials boiler, proper selection of the parameters, compared with the conventional gas boiler, to save more than 20% area of lower capital requirements of the boiler room, the user inputs the cost is also reduced.
10th June this year, the provincial government agrees that the ecological environment in Zhejiang Province Office issued the "Notice on the implementation of special emission limits national emission standards of air pollutants" (hereinafter referred to as "notice"), marking the full implementation of Zhejiang Province especially national emission limits of air pollutants.
"Special emission limits" is mainly for land development density is already high, the environment carrying capacity began to weaken, or less atmospheric environmental capacity, ecological environment is fragile, more stringent prone to serious air pollution problems in sensitive areas and set the emission limits. Implementation of the national emission standards for special emission limits, Zhejiang Province in favor of further strict pollution management, reduce pollutant emissions, to further improve air quality, but also help promote the integration of the Yangtze River Delta environmental standards.
In fact, back in 2013, Zhejiang has already begun in some areas particularly the implementation of the national emission standards limit emissions of air pollutants, but was limited to Hangzhou, Ningbo, Huzhou, Jiaxing and Shaoxing, Hangzhou Bay five cities; and this is to expand to the province level. In addition to a wider geographical range, "advertisement" clearer pollutant emissions targets, e.g., volatile organic contaminants not individual indicators, including not only non-methane hydrocarbons, total volatile organic compounds such as benzene, benzene and other pollutants indicators meet the definition of volatile organic compounds should be performed; also more involved in the industry, such as boilers only provides original coal-fired boiler, and "notice" it covers all types of boilers (including oil, gas).
It is reported that, in the national emission standards have been implemented, a total of 25 standards set emission limits of air pollutants in particular; at the same time, the recent ecological Ministry of Environment and the State Administration of market regulation has released three national emission standards of air pollutants, namely, pharmaceuticals, paints, inks and adhesives and volatile organic compounds fugitive emission control standards, and will be from July 1, 2019 implementation. According to "notice" requirement, the province is also involved in the enterprise should implement special emission limits specified in the three standards, the execution time of the emission standards time synchronization. Provincial Department of Atmospheric environment Department official said: "The implementation of the national emission standards for emission limits in particular, help to further strict management of our province pollution, reduce pollutant emissions, to further improve air quality, but also help promote environmental protection in Yangtze River Delta standard integration. "
Revamping technology of coal-fired boiler conveyer at present the layer-fired boilers are burning raw coal, in which the majority of coal-fired boilers will hinder the air intake of the boiler and affect the combustion of coal-fired boilers. When the coal-fired boiler is reformed, the bucket-type coal feed is transformed into layered coal, and the middle block of raw coal is distributed loosely from the bottom to the top on the grate by using gravity filter, which is beneficial to the air intake, can improve the combustion condition and increase the combustion rate of coal. Reduce the carbon content of ash.
The smoke exhaust heating unit not only increases the boiler load, but also finds that the smoke exhaust temperature is increased to a certain extent. In operation, it is found that the flue gas temperature of this kind of boiler is lower, the exhaust temperature is only about 120 ℃ at 70% load, and 103 ℃ at 150% overload. Therefore, you can not install economizer. Although the actual exhaust temperature is lower than the standard, there is no corrosion of flue gas to flue gas and fan after operation. In addition to the low exhaust temperature in the overloading operation of the boiler with threaded flue gas tube, the exhaust temperature of other type boilers under reasonable air distribution is lower when the overloading operation is carried out. For example, the exhaust temperature of SZL4.2-95/70 hot water boiler is about 208C ~ 210C at 70% load and 210 ℃ ~ 213C when overloading is 140% or so, for example, the temperature of exhaust gas is about 208C ~ 210C in 70% operation of the hot water boiler with door produced by a certain factory. When the exhaust temperature of some hot water boilers exceeds 150 ℃ due to design reasons and overloading, a economizer should be installed to reduce the exhaust temperature and avoid the fan running beyond the design temperature (200 ℃).Free Chat
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