It is about the ring screw thread smokechannel of the boiler shell type gas tube in the boiler field.
锅壳式烟管锅炉烟管内置水管的环形螺纹烟道，它涉及锅炉领域。
2
The water pipe (4) of the smoke pipe (5) reduces the flowing section of the smokechannel, speeds up the smoke flow, improving the heat transmission performance and efficiency.
烟管（5）中的水管（4）减小了烟道流动截面积、 加大了烟气流速，使得烟气传热性能增强、热效率高。
3
The smokechannel is connected into the smoke and dust separation room that contains water by smoke pipes, the smoke is led to the lower part of the boiler by the blower through a twice smoke pipe.