Four combustion modes of horizontal boiler offerBoiler as an energy conversion equipment, plays a very important role in industrial production, can be said to be the core main force of production enterprises. I know the boiler, but it is estimated that most people do not know much about the combustion mode of the boiler. Today, our Fangkuai Boiler will take you to understand the four combustion modes of the boiler. It can be divided into suspended combustion, boiling combustion, layered combustion and gasification combustion. The following is one by one. First, suspension combustion, also known as fire chamber combustion, is a combustion mode in which fuel is injected into the furnace with air in the form of fog, powder or gas. Suspension combustion ignition is rapid, combustion heat The efficiency is high. It is easy to realize automatic operation. The adaptability to load variation is strong. And the adaptability to the fuel is also strong. However, this combustion mode requires a high level of operation, and should not run intermittently. Secondly, boiling combustion is a kind of fluidized boiling combustion of fuel in fluidized bed under the action of appropriate velocity of air. Boiling combustion is suitable for all kinds of coal, especially inferior coal, such as coal gangue. Stone coal, and so on, this combustion mode on the size of coal particles also have certain requirements. The coal mass must be processed and broken into particles with an average diameter less than 10mm during combustion. Delivered by coal-feeding equipment Enter the furnace. Third, layered combustion, also known as fire bed combustion, is a way of burning fuel in a certain thickness on the grate. This combustion mode is only suitable for solid fuels. However, there are certain requirements for particle size (6~50mm). Layered combustion can basically adapt to solid fuel. As long as the mixture of air and fuel layer is good, and there is a certain combustion temperature, the ideal combustion can be achieved. If the air and fuel layer do not mix well, or the local air supply is insufficient, the combustion will be incomplete and the combustion efficiency will be low. This type of combustion is generally used in chain furnaces. IV. Gasification combustion Gasification combustion mainly refers to gasification and direct combustion of coal put into furnace, and this combustion mode is not suitable for coal with low ash content. High-temperature gasification and staged combustion is different from ordinary gasification combustion. Its utilization principle is as follows: under the condition of oxygen, the fuel surface is heated with high-temperature heat source above 800 ℃, so that the fuel can be rapidly pyrolysis and gasification combustion from outside to inside. Part of the high temperature produced by combustion is then gasified at high temperature, and part of the fuel is discharged for work, thus forming a continuous high temperature gasification combustion reaction.
In the transformation process, side by rapid technical engineers FGR advanced combustion technologies, the use of flue gas recirculation and the outer loop is provided, withdrawing part of flue mixed with the combustion air, and then into the furnace through a burner, not directly part in the combustion, by reducing the effect of the combustion flame temperature to reduce the temperature and oxygen concentration, to achieve the purpose of reducing NOx generation. For now, for a large volume of gas horizontal boiler offers, low compared to the overall transformation of nitrogen to replace the boiler equipment will save a lot of costs. Fast boiler has a boiler in research and technology low nitrogen aspects of considerable industry experience, successful completion of the reconstruction project Dingzhou low nitrogen Erie boiler, significant cost savings for businesses.
1. Characteristics of gaseous fuel
It is easy to mix with air during combustion, has low smoke loss, high boiler efficiency; less sulfur and ash in fuel, high temperature coking and corrosion on heating surface; high flue gas flow rate, small overall boiler volume, boiler metal consumption Low volume. Direct use does not need to be broken, the operation is quiet; the ash and sulfur content is much lower than coal and oily fuel; the gas body does not produce a large amount of ash to be treated when burning coal; the pollution to the soil is small; The dust is low and the air pollution is small; the main pollutant is the nitrogen oxides produced during combustion. Of course, gaseous fuels have other advantages as well as some disadvantages and the like.
Biomass horizontal boiler offers maintenance is similar with gas fired boiler maintenance, biomass boiler have greater maintenance requirements than fossil fuelled boilers. The boiler manufacturer’s representative or boiler installer will usually carry out an annual maintenance which will include a full internal and external inspection of the boiler, the replacement of worn components (particularly grate components on moving grate boilers), lubrication and cleaning. The main maintenance interventions required by the user at regular intervals are a weekly visual inspection, emptying of the ash bin, greasing of induced draft fan bearings and manual brushing of the flue ways.
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