The new VII water-fire tube steam (VI hot water) boiler is a new eco-friendly and energy-saving product co-developed by our company and Professor Li Zhiguang—a famous boiler expert, professor of Harbin Institute of Technology and director of Beijing Institute of Light Boiler after 30 years of study and experiments, adapting to the conditions of our country. It is called as a revolution of industrial boilers by domestic and foreign experts. Its main characteristics are as follows:

With efficient diabatic spirally corrugated tube, it is designed by using heat transfer and flow resistance technologies of Harbin Institute of Technology. The boiler's actual capacity is 10-15% higher than name plate capacity: As the physical dimension and smoke speed of the spirally corrugated tube are rational, and the spirally corrugated tube doesn't form soot or wear when the boiler normally operates, the boiler's capacity and heat efficiency don't reduce with the extension of operating time;

The main heating surface is installed in the shell, so it doesn't leak cold air to the smoke side, and nearly a half of shell surface is heated. The boiler’s heating up time is one third shorter than other furnaces, and heat efficiency is the highest in various furnaces;

Boiler model	Rated evaporating capacity	Nominal steam pressure	Feed temperature	Nominal steam temperature	Active grate area	Exhaust gas temperature	Design efficiency	Coal consumption	Transportation weight of maximum package	Transportation dimensions of maximum package	Delivery mode
	t/h	MPa	℃	℃	㎡	℃	%	Kg/h	t	mm
DZL1-1.0-AII	1	1.0	20	184	1.85	157	80	118	14.2	5488×2200×2832	Fast
DZL2-1.0-AII	2	1.25	20	194	3.4	163	80	238	23.2	5900×2500×3256	Fast
DZL4-1.25-AII	4	1.25	60	194	5.18	180	80	472	28	6829×2550×3484	Fast
DZL6-1.25-AII	6	1.25	60	194	7.55	166	80	685	47.6	7695×3180×4074	Fast
DZL10-1.25-AII	10	1.25	105	194	12	151	80	1128	56	7746×3773×3441	assembly
DZL15-1.25-AII	15	1.25	105	194	18	161	81	1698	18.8	8650×2300×2500	assembly
DZL20-1.25-AII	20	1.25	105	194	22.9	150	81	2241	19.1	8915×3373×3337	assembly and semi-assembly
DZL30-1.25-AII	30	1.25	105	194	27.5	157	81	3380	25.6	7942×2440×2550	assembly and semi-assembly
DZL40-1.25-AII	40	1.25	105	194	34.5	162	81	4481	19.7	9568×2036×2568	assembly and semi-assembly
DZL65-1.25-AII	65	1.25	105	194	58.4	159	82	7270	28.8	9000×2440×2594	assembly and semi-assembly
DZL80-1.25-AII	80	1.25	105	194	77	160	83	8748	31	9600×2900×2594	assembly and semi-assembly
DZL100-1.25-AII	100	1.25	105	194	91	160	83	10623	34	9620×2900×2698	assembly and semi-assembly
Notes: Coal consumption counted by standard coal, parameters for reference only, and if the technology is improved, please refer to random technical parameters.