A few days ago, Handan City issued "on the deadline to complete the nitrogen oxide gas boiler governance" (the "Notice"), clear objectives, tasks nitrogen oxides governance gas boiler, expected to be completed more than 10 steam tons of gas before the end of October this year, low NOx combustion boiler reconstruction. "Notice" to the objectives and tasks of nitrogen oxide gas boiler control, time requirements, safeguard measures have been clearly defined.
First, the implementation of the transformation of ultra-low emissions
By the end of June 2020, the existing non-electrical gas steam boiler, hot water boiler, Stoker stoker furnace and completed the transformation of a low nitrogen combustion, soot, sulfur dioxide and nitrogen oxides reach 5mg / m³, 10mg / m³ , 30mg / m³, the new gas combustion boiler synchronizing means and is mounted low nitrogen meet emission standards. 20 tons of steam / hour or more gas-fired boiler installation atmospheric pollution automatic monitoring facilities, and networking with the environmental protection department, install a distributed control system (DCS system). 20 t steam / hour to be mounted gas-fired boiler exhaust gas nitrogen oxide analyzer.
Second, the phased completion of the task of transformation of governance
10 before the end 2018, to complete the combustion of the transformation Boilers nitrogen over 10 tons of steam, to complete the 1-10 tons of steam (having a steam tons and 10 tons of steam) combustion transform low nitrogen gas boiler before the end of October 2019, 2020 at the end of 6 before completing the transformation of low-nitrogen combustion gas steam boiler 1 ton. Counties (cities, districts) according to the actual situation, to be completed in advance of nitrogen oxides governance gas boiler.
Third, both subsidies and penalties
"Notice" requirement for acceptance of project management, to give appropriate subsidies comprehensive financial subsidies to control air pollution. Due to the unfinished task of governance be ordered to stop production of governance. For excessive emissions, fraud, unauthorized outage environmental protection facilities, waste-water treatment snuck issues such as rectification and punishment according to law; wrongdoing, be held criminally relevant personnel.
4.Separated municipal waste burning fluidized bed boilers
A decentralized heating heating mode and centralized heating in two categories. In the user local decentralized heating, for heating the size limit, only the low thermal efficiency parameter.Small CFBC boiler rate is not high (the thermal efficiency is about 50%). However, by thermal power plant heating central heating area is formed. Due to the large scale heating, the parameters of high efficient large CFBC boiler (thermal efficiency is up to 85%), so that the energy utilization efficiency greatly improve, saving fuel.
Condensing boiler condensing heat exchanger selection problem: all parts of the condensing boiler is in contact with the condensate, such as a condensing heat exchanger, flue gas duct and the induced draft fan must be suitable corrosion resistant material. I copper, aluminum two materials were compared, the aluminum alloy material found suitable for this research project more. ① copper and aluminum fin efficiency comparison: Ek reinforcement measure the relative percentages of the respective physical quantity of copper instead of aluminum fins fin (fin efficiency, heat transfer, heat transfer coefficient, etc.) change with the fin efficiency heat conducting fins improve the coefficient increases. However, the specific amplitude increases, the fin is limited by Movies Ⅱ material itself, the structure and the air-side heat transfer coefficient. In this study, we fin thickness of 0.02-0.18mm, and the fin height of 5-30mm air side heat transfer coefficient of 60 ~ 160WW / (m2 • K) of copper and aluminum fins of fin fins fin efficiency were analyzed and compared. After comparison, the copper fin fin efficiency is higher than about 0.938% aluminum fin ~ 29.86%. Different structures and conditions of copper, aluminum fins ② overall heat transfer coefficient on the refrigerant side heat transfer area per unit comparison: Typically, the total surface area of the side fins An overall heat transfer coefficient of the finned tube can be calculated as a reference :
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