How to select condensing atmospheric pressure hot water boiler condensing hot water boiler how to choose? Recently, with the improvement of people's awareness and promotion of low-carbon living national energy saving publicity, condensing hot water boiler increasingly popular in our country. In the face of the market claiming they are a larger number of condensed water boiler manufacturer and the price gap situation, difficult for consumers to determine how to choose a condensing hot water boiler, told us the following selection techniques condensing hot water boiler. Let us first find out what kind of boiler is condensing boiler, and their performance advantages are: this boiler on the basis of the original boiler can be increased by 3-6% efficient, but its comprehensive energy-saving effect is not obvious, mainly because of the way combustion size fire switch. Quasi reason condensing boiler combustion temperature nitrogen oxide emissions are greater than 120mg / m3. But the biggest advantage of this boiler is cheap. Fully premixed condensing boiler, or many professionals say, it is the real concentration. Since the boiler was designed with a deep full-condensation techniques, thermal efficiency as high as 109.1. In addition, all-frequency premixed combustion technology, the boiler 40% energy saving than conventional gas boiler, energy-saving effect is very obvious. As the cost of the boiler, boiler prices much higher than the prices to be condensing boilers, recovery of investment costs over one year takes about a year. The national coal industry in recent years due in large part to change the gas over the past two years, large and small gas boiler manufacturers, has been in short supply situation. At the same time, there have been some speculators, they want to take this opportunity to get back some money. Condensing gas hot water boiler is an energy-saving, environmental protection, safety, technical and service demanding products. Each manufacturer may feel that the Internet is good, but if you go to the manufacturers site visits, you will find a big gap, so it is necessary to go to the manufacturers site visits!
The main characteristics of the indicators boiler What? To demonstrate configuration, capacity, parameter and economical operation of the boiler, etc., generally represented by the following indicators to the basic characteristics of the boiler. A) evaporation industrial boilers evaporation is generally 0.1 ~ 65t / h. For the atmospheric pressure hot water boiler with a nominal thermal power of its capacity to indicate the size, in units of MW. (Ii) pressure and temperature for saturated steam production boiler, just indicate steam pressure. For the production of superheated steam boiler, the steam temperature of the steam must be marked at the outlet of the superheater, i.e., superheated steam temperature, the unit is deg.] C. For hot water boiler, the hot water temperature has rated outlet and rated the import of sub backwater temperature. With rated thermal power, rated water temperature and the return temperature corresponding to the rated nominal referred circulating water flow of water through the hot water boiler, the unit is t / h. Heating boiler (iii) an evaporator heating surface and the heating surface of the heat generation rate surface evaporation rate or heating rate is an indicator of the intensity of the boiler work, the greater the numerical value, the better the heat transfer, the smaller the amount of metal consumed boiler. Heating surface evaporation rate general industrial boiler is less than 40kg / (m · h); heating surface of the heating rate of hot water boiler is less than 83700kJ / (m · h) iv) the thermal efficiency of the boiler which is an index indicating economical boiler heat, general industrial combustion thermal coal boiler efficiency of around 60% to 82%. Sometimes, in order to measure the heat economy schematically steam boiler, are also commonly used coal or coal water vapor than the ratio expressed as the ratio of the amount of coal in the boiler per unit time over the period of time and the amount of steam production. Coal-water ratio of about the size and type of boiler, coal quality and operation management quality and other factors. Industrial boilers coal-water ratio is generally l: 6 ~ 1: 7.5. Description (a) Evaporation: desired amount of steam produced per hour steam boiler called evaporation, the unit is t / h steam boiler showed that the size of the rated capacity of evaporation, i.e. in boiler design parameters and ensure a certain efficiency. maximum continuous evaporation, also known as the rated output of the boiler (ii) pressure and temperature: the rated pressure steam boiler of the steam at the outlet of the steam or the hot water boiler rated working pressure rated pressure at the outlet of the hot water boiler is called, and He said maximum working pressure, in units of MPa (iii) an evaporator heating surface and the heating surface of the heat generation rate: refers to the heating surface of the pot soft drinks and other heat transfer medium and the flue gas heat exchange area of the pressure receiving member, usually with smoke metal surface area of the gas-side heating area is calculated, in units of square meters. the amount of steam per hour per square meter of the resulting heating surface, called boiler heating surface evaporation rate, in units of kg / (m · h) per hour hot water boiler m² heating surface of heat generated by the heat generation rate is referred to as heating surface, the unit is kJ / (m · h). (Iv) thermal efficiency: thermal efficiency of the boiler is a boiler effective utilization percentage of the heat input and heat boiler per unit time, also called boiler efficiency, [eta] is represented by the symbol.
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