解决6吨热水锅炉尾部受热面磨损问题
Solve the problem of heating surface of 6 tons of hot water boiler
6吨热水锅炉进入尾部烟道的飞灰由于温度较低，具有一定的硬度，因此随烟气初级受热面排管时，会对管壁产生磨损作用。特别是省煤器，进口烟温已降至450°C左右，灰粒较硬，且采用小直径薄壁碳钢管，更易受到磨损损坏。而且磨损也正是省煤器爆管在锅炉四管爆破事故中占的比例较高的原因之一。
The fly ash that enters the tail flue is because of the low temperature, it has certain hardness, so as the exhaust gas primary heating plane pipe, it will wear effect to the wall of the pipe. Especially the economizer, import the smoke temperature has fallen to about 450 ° C, ashes is hard, and using small diameter thin-walled carbon steel tube, are more susceptible to damage of wear and tear. And wear is one of the reasons that the coal burner has a higher proportion of the boiler's four pipe blasting accidents.
含有硬粒飞灰的烟气相对于管壁流动，对管壁产生磨损称为冲击磨损，也称冲蚀。冲蚀有冲刷磨损和撞击磨损两种基本类型。两种磨损的金属流失过程的微观形态是不完全相同的。
The flue gas that contains the hard particle fly ash is relative to the flow of the wall of the pipe, and the damage to the wall of the tube is called the impact wear, also called erosion. erosion
There are two basic types of erosion wear and impact wear. The microscopic appearance of two worn metal loss processes is not exactly the same.
冲刷磨损是灰粒相对管壁表面的冲击角较小，甚至接近平行。灰粒垂直于管壁表面的分立使它楔入被冲击的管壁，而灰粒与管壁表面相切的分力使灰粒沿管壁表面滑动，两个分立合成的结果起一种对管壁表面切削的作用。
The erosion of the ash is smaller and even close to parallel than the surface of the surface of the ash. Soot particle separation to make it on the surface of the perpendicular to the pipe wall wedging the shock tube wall, and ashes and wall surface tangent component makes ashes sliding along the wall surface, synthetic results of two separate ACTS as a cutting on the surface of a wall.
如果管壁经受不起合力的切削作用，就有金属颗粒脱离母体而流失。在大量飞灰长期反复切削作用下，管壁表面将产生磨损。
If the wall is not able to withstand the force of the cutting, the metal particles are lost from the matrix. The surface of the tube wall will wear out after a large amount of the long and repetitive removal of the ash.
