steam boiler Agent direct vent

According to China's introduction of atmospheric pollution environmental requirements for cities Beijing, Shanghai and other implementation of 30mg / Nm³ nitrogen oxide emissions requirements, boiler equipment and therefore we want to change the low nitrogen respect. Low nitrogen boiler, once launched, has been widely recognized by the market.

How the thermal efficiency of the boiler in order to improve the TSGG0003-2010 "industrial boilers energy efficiency testing and evaluation rules" calculated in the thermal efficiency point of view: the thermal efficiency of the boiler ηj = 100% - (q2 + q3 + q4 + q5 + q6) where: Q2 is the exhaust heat loss, q3 incomplete combustion gas heat losses, q4 solid incomplete combustion heat loss, q5 is heat loss, q6 ash material is heat loss. To save fuel, improve the thermal efficiency of the boiler, common measures are the following: 1, the use of flue gas heat recovery technology to reduce exhaust loss of the main factors influencing the heat loss is the exhaust gas temperature. The higher the exhaust gas temperature, the greater heat losses. Currently, when most of the new boiler factory is equipped with flue gas heat recovery unit, such as economizers, half or full condensation condensing flue gas heat recovery device, these measures can effectively reduce exhaust gas temperature and improve the thermal efficiency of the boiler. 2, reasonable control air-fuel ratio, to optimize combustion and reduce the loss of incomplete combustion when the heat losses and the excess air coefficient is too high, excess equivalent of inhaled cold air into the furnace, this part of the cold air does not participate in the combustion of the excess, but vain drained after being heated, heat losses increase; cold air into the furnace as to continue to increase beyond a certain limit, the furnace temperature will be lowered, incomplete combustion can also cause loss increases. When the excess air coefficient is too low, the fuel can not get enough oxygen for complete combustion, resulting in incomplete combustion loss increases. The long-term severe incomplete combustion, boiler heating surface will result in carbon impact heat transfer efficiency, continues to increase exhaust losses. Therefore, the reasonable control of the air-fuel ratio to minimize heat losses and incomplete combustion losses q2 q3, is another key point to enhance the thermal efficiency of the boiler. 3, strict control of boiler water, boiler scale control SCIENCES water will contain various impurities and calcium and magnesium scale substances, boiler fouling inevitably. Low thermal conductivity of the scale, so that once the heating surface fouling due to increased thermal resistance, boiler exhaust gas temperature rises, heat losses will increase. Test data indicate that the boiler heating surface junction 1mm scale, heat losses will increase from about 2% to 4%, the thicker the scale boiler heating surface, the greater the resistance, the thermal efficiency of the boiler will be lowered more. Boiler fouling not only reduces the thermal efficiency of the boiler, and the boiler Heating Surface temperature rise, causing heating surface damage, and even cause boiler explosion. Therefore, high-quality soft water treatment apparatus, in strict accordance with the process operating boiler feed water softening devices, the control of boiler feed water quality, can delay scale formation. Meanwhile, boiler scale control in real time to master the situation boiler scale, a scale clean-up, if necessary, is also very important. 4, strengthen the insulation, to prevent leaking, reduce heat loss due to the boiler, the temperature of soda heat pipe system is better than the boiler room air temperature is high, some of the heat will be dissipated to the ambient air by radiation and convection, heat radiating boiler loss. Accordingly, when the insulation layer and the heat pipe boiler systems found damaged or leaking, it should be repaired, to reduce heat loss.

After many trials and tests, a great change has occurred on the one-piece design condensing gas boiler. Taking into account the fuel for combustion, the furnace larger design space, the heating surface and more abundant. Compared with the traditional design of the structure of an ordinary gas boiler, fuel combustion in the furnace is more uniform, more heat removal, a higher utilization rate.

It is reported that the atmosphere and do in Hebei Province recently issued issued a "coal-fired boiler upgrade Hebei three-year battle plan" (hereinafter referred to as "Plan"). "Plan" put forward, will continue to increase efforts to eliminate 35 tons of steam / hour and coal-fired boilers, as of 2020, the province's 35 steam tons / hour and the boiler "No Coal", while steaming retains 35 t / h coal-fired boiler and above the implementation of energy efficiency retrofits to mention environmental protection.

2017, Hebei cities (including Dingzhou, Xinji) built-up area for 35 steam tons / hour and coal-fired boilers, the county seat 10 steam tons / hour and coal-fired boilers basically completed "clear" work. 2018, the province plans to phase out a total of 6764 units 13466 tons of steam coal-fired boiler, stove and stove operating a small coal stove, have been eliminated as of September 35 steam tons / hour and coal-fired boilers 6141 Taiwan 12485 tons of steam.

Next, Hebei will focus on the implementation of nine key tasks:

First, actively promote central heating facilities, industrial parks and accelerate the elimination of coal-fired heating boilers, the implementation of "the big-generation small" and "a garden a furnace" governance program, organized industrial wasteheat special action.

Second, increase clean energy alternatives, optimize energy structure boiler. As of 2020, municipalities and districts and counties built-up area of ​​straight pipe central heating and clean energy heating rate of 100%.

Third, increase the coal-fired boiler energy conservation and environmental protection to enhance the transformation efforts.

Fourth, increased pollutant emissions and coal quality management and control efforts, deepening the boiler control. For reservations of 35 steam tons / hour or more coal-fired boiler to install air pollution automatic monitoring facilities and networking with the provincial and municipal environmental protection department.

Fifth, to accelerate the application of new energy technologies, promote demonstration projects mature. Require municipalities to develop clean energy development plan, and carry out the heating boiler can too + + PV, geothermal pilot, accelerating wind power demonstration heating Zhangjiakou region, to promote biomass energy, gas, alcohol-based fuel, industrial waste heat, light hydrocarbon fuel and other types of energy.

Sixth, give prominence to coal-fired boilers "Gas", "electricity" management. Municipalities To plan, implementation of the "gas will change," "power given to change." Heating boilers complete transformation of all time ahead of the end of August, without access to gas, clean energy power light before shifting coal-fired heating boilers can not be removed.

Seven, to carry out comprehensive environmental remediation coal-fired boilers, the implementation of grid management systems.

Eight new boiler strict access, strict implementation of pollutants and reduce the amount of times the coal alternative system. By the end of 2018, the province's coal-fired boiler control in less than 110,000 tons of steam.

Nine, strict boiler exclusion criteria, norms and acceptance transformation.

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