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How to Reduce the Carbon Content of Ash in Gas
TIME:2017-5-11 9:13:19 | VIEW:
Gas production furnace ash content of carbon should be determined by the level of reaction temperature. When the reaction temperature is high, the oxide layer of coal is burned more completely and the ash content is low. And ash melting point, melting the slurry fuel wrap, so that the lack of adequate response above; cooling molten coal will be solidified, it is difficult to drain, is not conducive to the operation and protection of equipment, so try to avoid. In addition, the response time and the stability of the material layer are also important, and it is conceivable that the furnace body has a gray layer, an oxide layer, a lower layer, and the carbon layer at the same level, providing a gray content of ash from the high water level. If the lower layer of carbon is maintained in the long, more complete combustion reaction, the lower carbon content in the ash is maintained by the same material layer and the oxide layer. The key to increasing the reaction time, temperature, and furnace stability of the oxide layer is to reduce the carbon content of the ash.
In the display of the air flow rate at the control target and the control current, the pressure in the furnace, the furnace temperature, and the furnace at the saturation temperature of the fire detection level through the various stages of the furnace can be measured very brazing. These indicators, air flow, safety and temperature, the height of the ash layer and the reaction temperature and the material layer have a large stable relationship, can affect the ash carbon content. While other indicators are generally used to control the furnace.Air traffic control over the same period the air enters the stove with a stable and safe operation. The flow is small and the carbon content of the ash is low for the long reaction time of the oxide layer. However, adjusting the air flow is limited by gas production, gas pressure and other factors, and less chance to adjust. In addition, the air flow rate and the temperature of the oxide layer have a certain relationship, simply, the air flow is small, oxygen less coal, natural low temperature oxide layer reaction, so that the air flow can be determined according to different requirements. The height of the gray layer protects the grate, evenly distributed, and acts as a heating gasifier. Usually, it is best to keep it at 300-600 mm.
All the indicators contained in the most complex content of the saturated temperature, it reflects the temperature of the gasifier, moisture content. The volume of air, the temperature difference, the water can contain different. The higher the temperature, the more water can be evaporated, the more water contained in the gasifier, is not conducive to improving the reaction temperature, coal gasification is not good, it is difficult to reduce the ash content of carbon. In contrast, when the saturation temperature is too low, the temperature of the oxide layer may exceed the melting point of the ash, resulting in slagging and achieving the same effect. The gasifier is involved in the coal gasification reaction, and the nature of the reaction determines the saturation temperature of the gasifier to control the saturation temperature to reduce the amount of carbon ash that is significant and can be said to be critical.
Because the saturation temperature of the ash, then the saturation temperature coefficient of carbon content and what impact a significant impact? From the gas generator in the gas furnace to the upper part of the water jacket, the jacket is separated from the formation of steam, in addition, there are added saturated steam into the tube. Therefore, the saturation temperature is mainly affected by two aspects. To analyze and influence the saturation temperature of these two links, find out the factors in the study, we can better control the saturation temperature and reduce the carbon content of the ash used.
In the first part, the water jacket is a saturated temperature of the temperature of the gasification agent which is heated by the combustion of coal and is heated by heating the air to form a gasifying agent to produce steam and hot water vapor. The softened water jacket is replenished from the outside, so the temperature and flow rate of the deionized water directly affects the saturation temperature. The lower the temperature, the greater the flow, the steam is much smaller than the air, the lower the saturation temperature produces less water jacket steam.
In the second aspect where the added steam enters the gasifier and the water content, the saturation temperature also increases, thereby increasing the gasifying agent. In addition, the impact of high quality anthracite particle size is also great. At present, the size of anthracite particles is generally 13? 50mm, under the same conditions and the stability of gasification reaction, the smaller the smaller the particle size, the more complete combustion reaction. More uniform particle size, uniform distribution of air, so that combustion more complete.
In addition, the ash supply layer temperature gasifier is evenly distributed or does not have a height that can affect the saturation temperature of the gas before the reaction. But compared to the previous few factors seem insignificant, not very good analysis, can be ignored.
In short, the saturation temperature of the factors affecting the carbon content of the ash and the material layer is stable or not. Factors affecting the saturation temperature have softened the water temperature and flow. By controlling the temperature of the deionized water, the softening of the water flow is regulated, thereby controlling the saturation temperature, a good way to reduce the carbon content in the ash furnace. Gas production industry has a long history, due to the accumulation of experience, a variety of indicators have been basically finalized. With the ever-decreasing resources and the increasingly competitive market, the production process, production efficiency and energy conservation to find the best combination to improve the productivity of the various parameters of the in-depth study is very good.
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