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从哪几个方面来提高热风炉的效率?

2019-04-15 来源:http://www.zhongyanjixie.com 发布人:admin 浏览量:
热风炉的热效率的好坏,将是决议设备运转效率的快慢与否,所以说,效率的上下是关乎到整个设备的,而影响其效率要素却是与其燃料、运转调整、参数和余热回收应用等有关。因而,为了可以更好的协助大家进步效率,接下来我们就来剖析下几点如何进步其热效率。
  The thermal efficiency of hot blast stove will decide the speed of equipment operation efficiency. So the efficiency is related to the whole equipment, but the factors affecting its efficiency are related to its fuel, operation adjustment, parameters and waste heat recovery application. Therefore, in order to better assist you in improving efficiency, we will analyze the following points on how to improve its thermal efficiency.
  1.进步熄灭效率
  1. Progressive extinction efficiency
  热风炉的熄灭效率表示熄灭完整熄灭的水平。若要进步熄灭效率,必需设法调整和组织好炉内的熄灭工况,使燃料充沛熄灭,降低q3和q4。燃料熄灭不好,会使气体不充沛熄灭损失和固体不完整熄灭损失增大,使熄灭效率降低。使燃料充沛熄灭必需有三个条件:一是要有足够量的空气,燃料与空气要充沛混合。二是要有足够高的炉膛温度,以使燃料的熄灭反响能疾速停止。三是要使燃料在炉内具有一定的停留时间,以使燃料与氧能得到充沛反响。依据这三个条件,可采取如下措施以强化熄灭。
  The extinguishing efficiency of hot stove indicates the level of complete extinguishing. In order to improve extinguishing efficiency, it is necessary to adjust and organize the extinguishing conditions in the furnace so that the fuel can be fully extinguished and the Q3 and Q4 can be reduced. If the fuel is not extinguished properly, the loss of insufficient gas extinguishing and the loss of incomplete solid extinguishing will increase, and the extinguishing efficiency will decrease. There are three conditions for the fuel to be fully extinguished: first, there must be enough air, and the fuel and air must be fully mixed. Secondly, the furnace temperature should be high enough so that the reaction of fuel extinction can stop rapidly. Thirdly, the fuel should have a certain residence time in the furnace, so that the fuel and oxygen can be fully reacted. According to these three conditions, the following measures can be taken to strengthen extinguishing.
  (1)合理送风微风量调理
  (1) Reasonable air supply and breeze regulation
  合理送风是强化熄灭的关键。在机械化熄灭的热风炉(如链条炉、振动炉和往复炉)中,依据熄灭过程的不同特性,合理送风,关于促进炉内熄灭是很重要的。
  Reasonable air supply is the key to intensify extinguishing. In mechanized extinguishing hot blast stoves (such as chain stoves, vibrating stoves and reciprocating stoves), it is very important to properly supply air according to the different characteristics of extinguishing process.
  (2)控制炉膛过量空气系数
  (2) Control of excess air coefficient in furnace
热风炉生产厂家
  控制炉膛过量空气系数是进步燃料完整熄灭水平,降低热损失的措施。炉膛过量空气系数过高,会使炉膛温度降低,招致熄灭速度降低,从而使气体不完整熄灭损失和固体不完整熄灭损失增大,表如今黑烟滚滚,灰渣含碳量高,热风炉燃料耗量增加,出力大幅降落。而过量空气系数过低,常常由于可燃物得不到氧气而不能完整熄灭,也形成气体不完整熄灭损失和固体不完整熄灭损失增大。因而,炉膛过量空气系数有经济的数值,这一数值使q2,q3,q4三者之和小,即佳过量空气系数。这个数值能够经过熄灭调整实验肯定。
  Controlling excess air coefficient in furnace is a measure to improve the level of complete fuel extinction and reduce heat loss. The excessive air coefficient in the furnace will reduce the temperature of the furnace and the quenching speed, which will increase the loss of incomplete gas extinguishing and the loss of incomplete solid extinguishing. Nowadays, the black smoke is rolling, the carbon content of ash and slag is high, the fuel consumption of the hot blast stove increases, and the output decreases greatly. The excess air coefficient is too low, often because the combustibles can not get oxygen and can not be completely extinguished, also resulting in gas incomplete extinguishing loss and solid incomplete extinguishing loss increased. Therefore, the excess air coefficient of the furnace has an economic value, which makes the sum of q2, Q3 and Q4 the minimum, that is, the optimum excess air coefficient. This value can be confirmed by extinction adjustment experiments.
  (3)维持炉膛高温
  (3) Maintaining High Temperature in Furnace
  维持炉膛高温是燃料疾速熄灭的条件。层燃炉、煤粉炉、燃油及燃气炉在正常熄灭工况下高达1300-1600摄氏度,炉膛出口烟温也高达1000摄氏度左右。炉膛内坚持高潮的目的:一是进步熄灭化学反响速度,降低q3,q4的损失,二是进步辐射换热强度。
  Maintaining high temperature in furnace is the condition for rapid extinguishing of fuel. Layer burners, pulverized coal fired furnaces, oil-fired and gas-fired furnaces can reach 1300-1600 degrees Celsius under normal extinction conditions, and flue gas temperature at furnace outlet can also reach about 1000 degrees Celsius. The purpose of climax in the furnace is to improve the chemical reaction speed, reduce the loss of Q3 and q4, and improve the radiation heat transfer intensity.
  维持炉膛高温的措施,在燃用劣质煤时,炉内温度会有明显降落。在这种状况下,一是能够应用耐火砖或耐火混凝土遮挡住一局部辐射受热面,降低炉内水冷水平,二是可增设空气预热器,将冷风预热后送入炉膛,以进步入炉热量,既可进步炉内温度又能降低排烟温度。
  The measures to maintain high temperature in the furnace will obviously decrease the temperature in the furnace when inferior coal is burned. In this situation, first, refractory bricks or refractory concrete can be used to shield a part of the radiation heating surface and reduce the water cooling level in the furnace. Second, an air preheater can be added to preheat the cold air into the furnace, so as to increase the heat input into the furnace, which can both improve the temperature in the furnace and reduce the exhaust gas temperature.
  以上内容由热风炉生产厂家整理发布,更多相关信息可以点击我们的官网进行咨询:http://www.zhongyanjixie.com
  More information can be consulted by clicking on our website: http://www.zhongyanjixie.com.
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