隧道窑顶部中间排烟管道怎么安装好用？

发布人：http://www.sftfgd.com   发布时间：2018-01-05 17:26:25

按照穿流焙烧的概念，在隧道窑焙烧过程中应尽量加大流经坯垛中部的风量。但传统的隧道窑设计上，所有预热带前端的排烟孔均是设置在窑墙两侧靠车面上的位置。这种设置方式有利的一面是在靠车面上位置抽出热烟气，可部分达到改善预热带车面温差大的问题；但是带来的弊端也不容忽视，这样的设置加大了隧道窑内环流气体的量，也就是边隙通风量过大，会造成整个焙烧过程中的传热不合理，延长了烧成周期，某些焙烧性能敏感的坯体也易于出现质量问题，例如中部易过烧，边部易出生砖等。

According to the concept of flow roasting, it is necessary to increase the volume of air flow through the middle of the slab during the roasting process of the tunnel kiln. However, in the traditional tunnel kiln design, all the pre - tropical front-end exhaust holes are set on the side of the kiln wall on the side of the car. This arrangement is advantageous side is on the car surface position out of the hot flue gas, can improve the surface temperature of the tropical pre car problems; but the drawbacks can not be ignored, this setting has increased the amount of gas flow in the inner tunnel kiln, is gap ventilation volume is too large, will cause the heat transfer in the process of roasting is not reasonable, prolonged firing cycle, some baking performance sensitive body is also prone to quality problems, such as the central easy burning, easy edge brick was born.

另外，因预热带处于负压状态下，特别是靠近抽风口的区域，在车下、车接头密封不好，或砂封有损坏的情况下，会将车下空气吸入预热带内，进一步加大了温差，浪费了热能。

In addition, because the pre tropical zone is under negative pressure, especially near the draught area, under the condition of bad seal on the bottom of the car, or if the sand seal is damaged, the air from the vehicle will be inhaled into the pre tropical zone, which further increases the temperature difference and wastes the heat energy.

为了克服这样的缺陷，建议在预热带前部窑顶上增设排烟管道，将单纯从边部窑墙上抽出烟气的量分流出一部分，通过窑顶上的排烟管道排出。

In order to overcome this defect, it is suggested that a flue gas pipeline be added to the top of the pre tropical kiln top, and the amount of smoke extracted from the side wall will be partly discharged and discharged through the exhaust pipe on the top of the kiln.

窑顶排烟管道设置的位置在应对准车面坯垛的之间的通风道，这样可加大车面上坯垛中部的通风量，改善了整个车面上坯垛的传热效果，从而达到提高产量和质量的目的。

The location of the exhaust pipe at the top of the kiln is located at the ventilation channel between the sides of the quasi car billet, which can increase the ventilation volume of the middle part of the billet and improve the heat transfer effect of the whole billet, so as to achieve the purpose of improving the output and quality.

因为现在的隧道窑车面上坯垛高度不是太高，特别是一次码烧的隧道窑，这种顶部增设排烟管道的措施，只要掌握好顶部与边部排烟气量的比例，就不会造成因窑内热气体上升力的影响而出现温差大问题。在某地烧结煤矸石多孔砖的大断面隧道窑上，在预热带前部窑顶上增设了排状排烟管道，取得了非常好的效果。

Because the stack height of tunnel kiln car blank now face is not too high, especially in a tunnel kiln firing, the exhaust pipe is added on the top of the measures, as long as the master and the top edge of the exhaust gas ratio, it will not cause due to the impact of gas lift and the heating temperature difference problem. In a large section tunnel kiln which has sintered coal gangue porous bricks in a certain place, a row of exhaust pipe exhaust pipes is added to the top of the pre - tropical kiln, and a very good effect has been achieved.

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