YINENG PRODUCTS

WNS Oil/Gas-Fired Energy-Saving Steam Boiler

Model / Series WNS

A three-pass wet-back shell boiler with an economizer for flue-gas heat recovery. Evaporation is 1–20 t/h and design efficiency 92.2–93.2%.

Atomized fuel burns in the fully corrugated furnace, transferring radiant heat in the first pass. Gas collects in the reversal chamber and enters the second-pass threaded smoke tubes, then turns at the front smokebox into the third-pass plain-tube bank before exiting through the rear smokebox, economizer and chimney.

Design and features

Hinged smokebox

A hinged smokebox supports inspection and cleaning while improving sealing.

Corrugated furnace

Corrugations increase heating surface and disturb gas flow for heat transfer, improve furnace flexibility and strength, and reduce thermal-expansion stress.

Threaded smoke tubes

Threaded tubes increase heating area and flue-gas residence time within limited space. Heat-transfer performance is 1.3 times that of ordinary smoke tubes.

Furnace and steam space

Provides steam storage space and heating surface.

Flue-gas heat recovery

The economizer and illustrated condenser recover gas heat to raise feedwater temperature and lower exhaust temperature. Finned tubes increase surface area; the condenser uses ND steel.

Calculation basis: lower heating values of 8400 kcal/Nm³ for natural gas and 10250 kcal/kg for diesel. Y denotes oil firing and Q denotes gas firing.

PRODUCT DATA

Specifications

WNS Fully Automatic Oil/Gas-Fired Energy-Saving Steam Boiler
Model			WNS1	WNS1.5	WNS2	WNS3	WNS4	WNS6	WNS8	WNS10	WNS12	WNS15	WNS20
Rated evaporation		t/h	1	1.5	2	3	4	6	8	10	12	15	20
Rated steam pressure		MPa	1.25（1.6）
Rated steam temperature		℃	194（204）
Rated feedwater temperature		℃	20					20（104）
Boiler body heating surface		m2	25.5	39.1	51.3	82.3	105	160.7	205.9	246.1	287.2	374.8	492.3
Economizer heating surface		m2	6	8.9	10.8	17.1	20.2	26.4	41.7	40.3	46.4	49.8	66.1
Design thermal efficiency		%	92.2	92.5	93.2	92.8	92.4	92.5	92.7	92.2	92.8	92.8	92.7
Design ambient temperature		℃	20
Boiler net weight		t	6.3	8.1	9.5	12.2	13.5	18.9	23.5	25.6	26.8	35	42.5
Boiler operating water capacity		t	2.8	3.7	4.7	6.6	8.1	11.5	15.3	18.9	20.7	28.1	37.8
Boiler full-water capacity		t	3.4	4.5	5.9	7.9	9.6	12.7	18	22.3	24	31.6	33.9
Boiler feedwater control			On/off feedwater control					Modulating feedwater control
Combustion mode			Slight-positive-pressure chamber combustion
Natural gas		Nm3/h	80.1	118.7	160.1	236	314.8	479.8 （407.8）	631.7 （553.3）	790.3 （691.1）	944.5 （825.3）	1173.2 （1016.6）	1545.3 （1342）
Diesel		kg/h	68.2	101.9	136.2	200.7	271.8	408.8 （347.3）	546.7 （476.4）	679.3 （599）	803.7 （711.9）	1000 （895.3）	1323.9 （1161）
Transport dimensions	Length	mm	3900	4080	4300	4690	5250	6100	6200	6853	6950	7520	8030
	Width		1900	2090	2100	2350	2550	2710	2920	3210	3310	3620	3780
	Height		2110	2240	2400	2502	2750	2980	3280	3500	3630	3820	4100
Installation dimensions	Length	mm	4630	4750	5100	5680	6350	7450	7700	8230	8355	9580	10560
	Width		2800	2990	3000	3250	3450	3610	3820	4110	4210	4520	5000
	Height		3630	3760	3900	4030	4600	4900	5200	5650	5850	5900	6000
Feedwater connection	DN	mm	32	32	40	40	40	40	50	50	50	65	65
Main steam outlet	DN	mm	50	65	80	80	100	125	150	150	150	200	200