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WNS series low nitrogen condensing oil (gas) steam boilers

WNS series oil / gas boiler

Pressure level: ≤2.5MPa
Specifications: Steam boiler: 0.5 ~ 20T / h
Hot water boiler: 0.35 ~ 14MW
Hot water boiler: widely used for heating, bathing and living in hotels, schools, communities and other enterprises and institutions

Product description

Parameters

　Product

　　WNS series low-nitrogen condensing boiler is a fully automatic, horizontal internal combustion, low-nitrogen condensing, fast-installed fuel (gas) boiler. The boiler body adopts a wet-back two-return structure: the corrugated furnace and the combustion chamber are the first return, and the threaded smoke pipe constitutes the second return. The economizer and condenser are placed on the top of the boiler and form the third return stroke of the flue gas outside the furnace.

　Performance characteristics

　　High efficiency and energy saving. The heat exchange area of the economizer and condenser is large, and the condensation rate of the water vapor in the flue gas is high, which can fully absorb the heat released by the condensation of the water vapor in the flue gas, and the thermal efficiency can reach more than 99%.

　　The boiler adopts the convective heating surface of the threaded smoke pipe to effectively improve the heat transfer efficiency of the boiler.

　　Good environmental protection effect. Some harmful components such as CO2, NOx and SO2 in the flue gas are dissolved in the condensate, effectively reducing the emission of air pollutants. At the same time, large-scale furnace structure and flue gas recycling technology are adopted. For gas boiler, ultra-low nitrogen emission can be realized completely, NOx emission ≤ 30mg / Nm3, which fully meets the increasingly strict national environmental protection requirements. The economizer, condenser and boiler are arranged as a one, which can be installed out of the factory quickly, with convenient installation, compact structure and elegant appearance. It covers a small area and reduces capital construction investment.

　　The spiral finned tube and shell of the energy saver and condenser are made of ND steel which is resistant to sulfuric acid corrosion, which greatly improves the service life of the equipment.

The combination of intelligent combustion control and automatic safety interlock protection system ensures economic, environmental protection and safe operation.

　　In the heat loss of boiler exhaust gas, in addition to the sensible heat of flue gas, water vapor also takes away a lot of latent heat of vaporization. If the water vapor in the flue gas is condensed completely or partially by reducing the temperature of the exhaust gas, and the latent heat released in the condensation process is recycled, the effective heat utilization of the boiler is increased, which will obviously improve the thermal efficiency of the boiler.

　　WNS type low nitrogen condensing gas boiler aims at the key technical factors such as the relationship between the condensation rate of water vapor in the flue gas and the exhaust gas temperature, the relationship between the condensation rate and the thermal efficiency, and the corrosion rate of the condensate to different steel grades. Through the reasonable design of the heating surface, the exhaust gas temperature is reduced to ensure that the condensation rate of water vapor in the flue gas meets the design requirements, so that the thermal efficiency of the boiler is greatly improved.

　　Due to the adoption of large-scale furnace structure and flue gas recycling technology, ultra-low nitrogen emission can be realized for gas boilers, with NOx emission ≤ 30mg / Nm3.

　Technical parameters of WNS series automatic oil / gas steam boiler

Boiler Model /Item			SZS10	SZS15	SZS20	SZS25	SZS30	SZS35	SZS40	SZS50	SZS65
Rated evaporation		t/h	10	15	20	25	30	35	40	50	65
Rated steam pressure		MPa	1.25/1.6	1.25/1.6	1.25/1.6	1.25/1.6	1.25/1.6	1.25/1.6	1.25/1.6	1.25/1.6	1.25/1.6
Rated steam temperature		℃	194/204	194/204	194/204	194/204	194/204	194/204	194/204	194/204	194/204
Rated feed water temperature		℃	20(104)	20(104)	104	104	104	104	104	104	104
Calculation of heat exchange area		m2	357.7	524	702.5	805.2	905.2	1052	1208	1512	1998
Design thermal efficiency (oil / gas)		％	98.48/99.35	98.4/99.3	98.34/99.15	98.1/99.48	98.2/99.2	98.6/99.4	98.64/99.5	98.6/99.4	98.4/99.5
Maximum transport weight of boiler		t	30	40	46.3	52	55.7	68	76	散件14	散件14
Boiler water capacity		t	10.1	14.7	16.9	18.9	21.6	23.8	27.7	/	/
Combustion mode		Micro positive pressure chamber combustion
Combustion regulation mode		Full automatic adjustment
Applicable fuel		Light Diesel/ Natural Gas
Fuel consumption	Natural gas	Nm3/h	805	1195	1600.7	1972	2190	3060	3060	3825	4893
Fuel consumption	Light diesel	Kg/h	663	986	1319.1	1598	1860	2540	2540	3175	4128
Power supply		380V/50Hz
Total power of equipment	Diesel fuel	KW	42.5	48.5	70.5	119	137	170.5	170.5	203	265
Total power of equipment	Gas	KW	38.5	46.5	66.5	108	130	159.5	159.5	188	250
Feed water pump	Electric power	KW	15	15	18.5	30	37	45	45	45	75
Water circulating pump	Electric power	KW	1.5	1.5	3	3	3	4.5	4.5	11	15
Fan	Electric power	KW	22	30	45	75	90	110	110	132	160
Maximum transport size		mm	7490×2790 ×3516	9120×3375 ×3566	10050×3330 ×4066	10200×3800 ×4150	10000×4030 ×4230	11000×4300 ×4230	12000×4300 ×4530	15500×4400 ×4530	11500×1500 ×1800
External interface	Water intake	PN MPa	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)
	Water intake	DN mm	50	50	65	65	80	80	80	100	100
	Main steam outlet	PN MPa	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)
	Main steam outlet	DN mm	150	200	200	200	200	250	250	300	300
	Second steam outlet	PN MPa	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)
	Second steam outlet	DN mm	40	40	50	50	50	50	50	50	50
	Regular drain outlet	PN MPa	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)
	Regular drain outlet	DN mm	40/50	40/50	40/50	40/50	50	50	50	50	50
	Continuous drain outlet	PN MPa	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)
	Continuous drain outlet	DN mm	40	40	40	40	40	40	40	40	40
	Safety valve interface	PN MPa	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)	1.6(2.5)
	Safety valve interface	DN mm	2×80	2×100	2×100	2×125	2×125	2×150	2×150	2×150	2×150
	Chimney size	(mm×m)	φ600×10	φ800×10	φ800×10	φ1000×10	φ1000×10	φ1200×10	φ1200×10	φ1300×15	φ1400×15

　WNS Boiler System Diagram

　Deaeration water supply mode (105 ° C water supply)）

　Direct water supply mode (20 ° C water supply)

　WNS series automatic fuel gas hot water boiler technical parameters

Boiler Model /Item			SZS7.0	SZS10.5	SZS14	SZS17.5	SZS21	SZS29	SZS46
Rated evaporation		MW	7.0	10.5	14	17.5	21	29	46
Rated steam pressure		MPa	1.0	1.25	1.25	1.25	1.6	1.6	1.6
Rated steam temperature		℃	70
Rated feed water temperature		℃	95/115	115/130	115/130	115/130	130	130	130
Calculation of heat exchange area		m3	240/133	200/150	267/200	334/249	300	414	657
Design thermal efficiency (oil / gas)		70o Backwater	96.1	96.3	96.3	94.38	96.4	96.3	96.4
		55o Backwater	98.2	98.5	98.5	95.8	98.1	98.3	98.3
		45o Backwater	99.6	99.8	99.8	98.1	99.3	99.8	99.4
Maximum transport weight of boiler		t	28	37	43.3	47.2	51.4	71	散件
Boiler water capacity		Chamber combustion
Combustion mode		Fully automatic adjustment
Combustion regulation mode		Natural gas, coke oven gas, light diesel
Fuel consumption	Natural gas	Nm3/h	760	1130	1510	1800	3056	3056	4848
Fuel consumption	Light diesel	Kg/h	632	938	1225	1530	2530	2530	4013
Power supply		KW	26	34	49	79	121	121	175
Total power of equipment	Diesel fuel	KW	22	30	45	75	110	110	160
Total power of equipment	Gas	KW	22	30	45	75	110	110	160
Feed water pump	Electric power	PN MPa	1.6	1.6	1.6	1.6	1.6	1.6	1.6
Feed water pump	Electric power	DN mm	200	250	200	200	250	250	350
Water circulating pump	Electric power	PN MPa	1.6	1.6	1.6	1.6	1.6	1.6	1.6
Water circulating pump	Electric power	DN mm	200	250	200	200	250	250	350
Fan	Electric power	PN MPa	1.6	1.6	1.6	1.6	1.6	1.6	1.6
Fan	Electric power	DN mm	50	50	50	50	50	50	50
Maximum transport size		PN MPa	1.6	1.6	1.6	1.6	1.6	1.6	1.6
External interface	Water intake	DN mm	2×80	2×100	2×100	2×125	2×150	2×200	2×200
External interface	Main Steam outlet	(mm×m)	φ600×10	φ800×10	φ800×10	φ1000×10	φ1200×10	φ1200×10	φ1400×15