2018ISH heating HVAC industry event, fast Boiler "Thalia T7" was set aside to hold the event May 23, ISHChina & CIHE China (Beijing) International heating ventilation air conditioning, heat pumps fresh air and home comfort systems and technology exhibition in Beijing International Exhibition hot center opening.
How to reduce the combustion temperature gas horizontal multistage d type boiler design Henan conventional low NOx combustion technique is mainly about how to reduce the combustion temperature to reduce thermal NOx generation undertaken Henan gas boiler main techniques include staged combustion, premixed combustion, flue gas recirculation, catalytic combustion porous media and flameless combustion. A, or fuel staging combustion air staging combustion thermal NOx generation largely depends on the combustion temperature. The equivalent ratio of the combustion temperature in the case where 1 is the highest, burned under lean or rich combustion cases, the combustion temperature will be much lowered. Using this principle has developed a staged combustion technology. Henan air staged combustion of gas boiler is a fuel rich combustion of the first stage, the second stage addition of excess air, the combustion is lean, the cooling air is added between the two to ensure that the boiler will not be too high combustion temperatures. Combustion air staging and fuel staging combustion contrary, with the first stage fuel lean combustion, fuel is added in the second stage so that the equivalent ratio required value is achieved. These two methods will eventually cause the excess air ratio of the entire system to maintain a constant, low nitrogen currently widely used as combustion control technique. Second, the premix lean premixed combustion technology Henan boiler combustion gas refers to fuel and oxidant completely mixed at the molecular level before the mixture is ignited. For controlling the generation of NOx, this technique has the advantage of controlling the combustion temperature can be achieved by fully controlling the equivalent ratio, thereby reducing thermal NOx formation rates, in some cases, partially premixed and the premixed combustion than non-premixed 85% -90% of combustion to reduce NOx production. Further, the premix can also be reduced completely to reduce the excess air ratio due to unevenness caused by generation control of NOx. However, premixed combustion technology there are still unresolved technical difficulties on the security control: First, because of its highly combustible premixed gas may cause tempering; the second is too high excess air ratio will lead to an increase in exhaust losses , reduces the thermal efficiency of the boiler.
Rated evaporation, refers horizontal multistage d type boiler design fuel species design, and operation at the design parameters, i.e. at a predetermined quality of steam (pressure, temperature) and a certain thermal efficiency, long-term continuous operation, the amount of steam produced per hour . The new boiler at the factory, the amount of evaporation on the nameplate marked, refers to the rated boiler evaporation of this.
2, pressure: uniform vertical force acting on the object surface, called the pressure, in units of "Newton (N)", is represented by the last kgf (kgf). 1 kg = 9.81 Newtons force. Vertical uniformly acting on the pressure per unit area of the object, called the pressure, in units of megapascals (MPa). On the habits, often referred to as the pressure of the pressure, so the pressure mentioned in this book, in fact, should be pressure.
1, the low-pressure operating saturation temperature of the soda mixture is reduced, so that the furnace temperature is reduced, while trying to increase the amount of evaporation at a low operating pressure conditions, the amount of fuel increases, the furnace temperature is low, easily lead to fuel consumption is not complete, risk black smoke, while the actual fuel consumption is also higher than the theoretical value.
2, low-voltage operation can cause serious boiler with water. If the nominal obtained evaporation at low pressure, then the steam flow rate will be high, with the water vapor will be more natural.
Boiler Feed Pump Overview: The DG Series boiler feed water pump is a kind of horizontal multi-stage centrifugal hot water pump, and apply to transport hot water and other water-like liquids whose impurity content is lower than 1% and grit size is smaller than 0.1mm and whose chemical and physical characteristics is similar to clean water.Learn More
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The multistage centrifugal pump series are designed to work with clean water in domestic applications, irrigation, industry, etc. the pump body is made of stainless steel, so that they are of beautiful design. At the same time, they have the advantage of low noise, easy operation and reliable performance.Learn More
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