4 tph WNS condensing steam boiler project for paper industryIn the corrugated paper processing line of the packaging industry, the steam boiler is an important heating system for increasing the temperature of the paperboard and is one of the essential equipment. Founded in 1995, Fuijian Nanan Lianfa Paper Industry Co., LTD. attached great importance to technical input and strictly controlled product quality. At the same time, they knowed thoroughly that the efficiency of boiler operation would directly affect the company's product quality and economic benefits. With the fierce market competition, Lianfa Paper decided to eliminate backward production capacity and introduce high-quality and high-performance environmentally friendly gas-fired steam boilers.After comparative analysis of many boiler products, Lianfa Paper was attracted by the excellent quality performance and environmental advantages of ZOZEN WNS series gas-fired boilers. All longitudinal and circumferential seam welding adopts advanced submerged arc automatic welding technology and passes 100% radiographic inspection to prevent unqualified welds. The design of the large-diameter corrugated furnace of this series of boilers provides sufficient heating surface and steam storage space to ensure the stable and high efficient output of high-quality steam. With the energy-saving equipment installed at tail flue, the exhaust gas temperature can be reduced to 60℃. The thermal efficiency is up to 98%, and the ultra-low emission of nitrogen oxides can be easily realized, and the economic benefits as well as the environmental benefits can be improved.
Circulating fluid bed boiler CFBB is a kind of environmental protection boiler, has developed rapidly in recent years due to its advantages of good thermal efficiency, flexible to different quality fuel, low sulfur and oxynitride effluent.
In mid-June this year, Hebei Province issued a notice regarding the development of gas-fired boiler nitrogen oxides (referred to as NOx) governance, in order to further deepen the boiler pollution control, reduction of nitrogen oxide emissions, improving air quality, will gradually nitrogen oxides exceeded boiler discharged for investigation and control work, high nitrogen oxide emissions from the original (150mg / Nm3 or above) is reduced to 30mg / Nm3. City, Hebei Province is located in the Yili Dairy Co., Ltd. to respond positively to governance EPA gas boiler NOx reduction, and led the way, three of the company's existing 15 steam tons / hour (t / h) gas steam boilers for low-nitrogen emissions transformation.
Effect of gas pressure changes in the gas kotelshchik gas boiler conditions during operation, the gas for combustion to the burner, when gas pressure changes, the change will lead to the gas entering the burner, this will affect the proportion of air and gas, whereby have some impact. The results caused by the gas pressure changes are the following possibilities: 1, hypoxia combustion: gas pressure suddenly increased, it is easy to burn the absence of oxygen occurs, resulting in incomplete combustion of gas, flue gas will be carbon monoxide, thermal efficiency of gas boilers have loss. 2, from the fire: if the gas pressure, the gas stream will cause the gas velocity greater than the burning rate, the flame away from the fire resulting from the flame hole edge called on to develop from the fire. This situation will result in flame or combustion instability, and even lead to security risks. General machinery comes with a high-pressure blast burner control, when the gas pressure exceeds a defined value the active flame protection. 3, the combustion peroxy: this occurs in the gas pressure is reduced, excess air appears, nitrogen and oxygen in the air reaction, resulting in excessive emission of nitrogen oxides. 4, tempering: If the gas pressure is very small, it will cause the gas flow velocity is less than the gas combustion speed, causing the flame tempering, influence the safe operation of the burner. General machinery blast burner comes with a low pressure control, when the gas pressure exceeds a defined value the active flame protection. When the gas pressure exceeds the operating range of the burner, the flame will be deformed, fireman gas boiler can operate normally whether this phenomenon was observed.
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