1. It uses arched tube plate and thread smokestacks constituted into the drum,the drum structure is quasi-elastic instead of quasi-rigid,abrogates the braced pieces of tube plate area, reduces the stress.The fire tube inside of tube plate is single return

2. The ascension pipes arranged at the bottom of drum,this make the sludge not easy to deposit,the high temperature zone of drum easy to be cooling,prevent the drum bottom swelling.

3. It adopts efficient heat transfer threaded pipe,strengthened heat transfer,then heating-up and pressure boost -up quickly, thus increasing the thermal efficiency.

4. Compact structure, smaller size compared with the same type, saving the boiler foundation cost.

5. Stable operation, easy to adjust, strong steam output.

6. Both wing wall and outlet widow inside of the furnace have the function of dust suppression,that make the original dust concentration controlled under the standard,thus ensuring the soot discharge scratch the index stipulated by the State Environmental