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Iraq Gas Fired Hot Water Boiler

Gas Fired Hot Water Boiler H6

Measures to improve the thermal efficiency of the fuel gas-fired boiler wns type of chemical oil-fired boiler which is incomplete combustion heat loss and mechanical incomplete combustion heat loss. Because almost no ash after combustion of the gas boiler, solid and liquid fuels without mechanical incomplete combustion, there is no need to consider the mechanical incomplete combustion of the gas boiler heat loss. In all heat losses, heat losses have tremendous proportions, when the high thermal efficiency of boilers, heat losses so the total loss of the main heat losses of fuel gas-fired boiler flue gas heat loss is the exhaust gas temperature and For air excess factor. When the exhaust gas temperature decreases, high thermal efficiency can be obtained, for example, a conventional three-pass steam boiler, furnace used in the past straight and smooth smoke tube, must increase the heating surface is arranged to make the exhaust gas to an acceptable degree, the theoretical discharge around the smoke heat loss. Potshell causing significantly increased diameter, wall thickness increased, greatly increased metal consumption, thus further reducing the exhaust gas temperature should be greatly restricted. From the aspect of heat transfer is not only now consider only the heated area, the use of new technology enables heat transfer performance significantly increased, the difference between the heat transfer overcomes the disadvantages of the past performance of the boiler, so that the exhaust gas temperature decreases, the structure is more compact. Center back boiler combustion boiler is preferably small foreign structure, although the two-pass boiler, the heated area is small, but the use of the turbulator charming, the purpose of enhancing the turbulence of the flue gas, disrupt laminar flow boundary wall, reducing the thermal resistance, increasing the heat transfer coefficient, a smaller heating area to achieve the same high thermal efficiency. Lower exhaust gas temperature limit in theory, the exhaust gas temperature can be reduced to very low or even close to the ambient temperature, for maximum thermal efficiency. However, in practice, due to the reduction of the exhaust gas temperature, low temperature corrosion will cause, therefore, the exhaust gas temperature can drop too low, in order to ensure that the wall temperature is higher than the main boiler heating surface flue gas dew point temperature. Therefore, low-temperature corrosion has become a major obstacle to reduce exhaust gas temperature and improve the thermal efficiency of the boiler. Tail auxiliary heating surface increases, further reducing the exhaust gas temperature, fuel gas wns improve thermal efficiency of the boiler as the oil, gas fuel burn easily wns type gas boiler air preheater generally not disposed. The economizer means is a common energy, which can be recycled flue gas was able to effectively reduce exhaust gas temperature. Separation type condensing gas boiler is out of the main boiler heating surface, the installation of the condensing heat exchanger. In one aspect of the flue gas absorption can significantly reduce the smoke temperature, reducing heat losses, on the one hand the absorption of part of the potential condensing water vapor released, increasing the effective use of heat of the fuel. Ash cleaning, to ensure that the heating surface of the scale wns boiler thermal efficiency of the boiler, the presence of soot fouling and heat transfer resistance increases, reducing the heat transfer effect. The thermal conductivity of the scale and soot is almost of the same order of magnitude, with the increase in scale, soot, the exhaust gas temperature rapidly increases, the thermal efficiency is significantly decreased. So, keep the boiler heating surface inside and outside clean, efficient heat transfer, thermal efficiency and to ensure the safe and economic operation of boilers, boiler fuel gas-fired boiler ash cleaning is required.

After transformation, the advantages of gas fired boilers: coal-fired boiler is the most primitive of boiler equipment, energy-saving and environmental protection with the social policy of many companies will continue to strengthen boiler re-transformation of high-quality boiler, replace lost cause serious pollution and fuel complex operations coal boiler, and in the situation in China has strongly advocated environmentally friendly low-carbon, energy-efficient gas boiler transformation will be the inevitable trend of social development, the following advantages to tell the story of the transformation of the gas fired boiler which specific? First, the coal-fired boilers to gas-fired boilers can reduce the incidence of contamination cleaner environment, due to the coal combustion process itself, there will produce a lot of smoke pollution on a great plus but not conducive to environmental protection, carried out in the gas boiler due low ash and sulfur content, and therefore the amount of smoke and dust generated little better achieve the national standards for environmental protection boiler equipment. Second, after more unique boiler can reduce the cost of investment after the successful transformation of the boiler, because gas-fired boiler is no need to configure a variety of desired soot blower and dust coal boiler slag equipment, and transform into a gas furnace boiler It does not require much space for space-saving stacking coal space, but also saves additional auxiliary gas boiler water for dust coal boiler slag and other dust.

Electric steam boiler of the heating process due to elevated water temperature within electric steam boiler, heating and evaporation of the bubble surface of the metal wall temperature begins to rise at any time. There are heating and iraq fired hot water boiler bath for two purposes. Hot water boiler by circulating hot water circulation pump hot water holding tank, the tank hot water heating cycle can be achieved bath object; hot water boiler by circulating hot water circulation pump heating conduit, through the heat sink (radiator) people can achieve heating requirements; hot water boiler and hot water circulating pump with heat exchanger can be achieved bathing and heating dual function. Steam boiler is an energy conversion device, the energy input to the boiler fuel chemical energy, electrical energy, thermal energy and other forms of high temperature flue gas, and after converting the boiler, the steam output having a certain outside thermal energy, high-temperature hot water or an organic carrier. Since the bubble greater wall thickness, in the electric boiler of the heating process, the thermal stress is a major problem, it is necessary for the thermal expansion of the bubble temperature and thermal stress study. At the same time, also considering the overall thermal expansion problems, especially an electrical heating surface tube steam boiler, since the thin wall thickness, length of problems in the process of heating the whole of the problems of thermal expansion, it should also be noted that the thermal stress. Prevent inadvertent failure caused. In the process of generating steam and processing the thermoelectric pressure steam boiler, when the temperature is higher than the outer wall temperature of the inner wall, the upper wall at a temperature above the wall temperature, the wall thickness and the temperature difference between the upper and lower walls of the bubble there is a temperature difference, i.e., bubble the inner wall temperature above the temperature of the outer wall, the wall temperature is higher than the wall temperature, the temperature difference between the thickness of the bubble exists in the thickness direction, the upper and lower walls of the larger temperature difference between the bubble, when the temperature is higher than the outer wall temperature of the inner wall, the wall temperature is higher than the wall temperature. In order to prevent excessive thermal stress, it is necessary to gradually increase the pressure of the boiler. In the process of electric spark and boost steam boiler, the steam parameters of the boiler components, water and conditions are changing. Therefore, in order to effectively prevent the occurrence of abnormal conditions and other hazards, it is necessary to arrange a variety of instruments to monitor closely the instruction of professional change. Within the normal allowable range, but also the reliability and safety of various instruments, valves and other components was evaluated by adjusting the process parameters pressure, temperature, water, etc., in order to fully guarantee the security of the electric steam boiler stable operation. The higher the electric steam boiler pressure, the higher the energy, the corresponding steam plant, pipes and valves can withstand the pressure will increase, which also makes the maintenance and protection requirements of the steam boiler is relatively high. In the production and transportation, and the ratio of heat loss will increase the share of the steam.

We learned that recently, Beijing issued a "three-year action plan to win the Beijing Blue Sky Wars," to date, mainly to strengthen ecological environment construction, pollution control tough fight to win Beijing, make the appropriate efforts. Details are as follows.

First, build a green energy system

Combined with the characteristics of the capital, in the city to protect the power supply, heat supply network under the premise of safe operation, relying on intelligent technology, strengthen external power transferred, increase the proportion of outside transmission. Full development of new local energy resources. Promoting clean renewable energy for heating, Municipal Development and Reform Commission, City Management Committee and other sector organizations to increase renewable energy use in key areas clean city sub-center, Beijing's new airport and other heating. In principle, to new natural gas cogeneration and gas chemical projects.

Second, lay Yajian coal finale

Led by the Agriculture Commission, in accordance with the principle of progressive advance of the first plains, mountains and then to "coal to electricity," the main scientific technical route choice, according to local conditions to promote rural village "coal to clean energy" work. 2018, the completion of the plains 450 villages "coal to clean energy" to carry out energy-saving synchronous rural residence. Completion of Pinggu District, clean energy transformation of coal-fired central heating boilers 5 of Yanqing district, the basic realization of the city's Plains "No Coal." In 2019, the development of scientific and effective mountains "coal to clean energy" technology roadmap, the heating period to break a long, large temperature difference and other problems, an orderly mountain villages of "coal to clean energy" work.

Third, improve energy efficiency

Municipal Development and Reform Commission and other departments to study and improve energy consumption limits system. City Housing and Urban Construction Commission, the Municipal Planning and Land Committee and other departments to revise new residential building energy efficiency design standards, energy-saving rate of more than 80%; accelerate the development of ultra-low energy buildings, new buildings strict implementation of green building standards. City Housing and Urban Construction Commission, the Municipal Urban Management Commission, Agriculture Commission and other departments saving renovations to existing buildings, Rural public buildings energy-saving standards and scope of the earthquake.

Fourth, accelerate infrastructure construction clean energy

City Management Committee, the Agriculture Commission and other departments to speed up the "coal to electricity" grid upgrading in rural areas, to meet the heating needs of the field of alternative energy. Into the "No Coal" facilities construction village, power and other reconstruction within the scope of planning in advance to give priority to implementation. Related power companies continue to strengthen the construction of power facilities and support capabilities.

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