SZS Gas Fired Double Drums Steam Boiler

Product Introduction

Main Features of SZS Series Gas/Oil Boilers

Reliable Cooling – Forced circulation in high-temperature zones ensures uniform cooling and prevents vaporization.
Safe Operation – Equipped with explosion-proof doors and flame detectors.
Leak-Free Design – Comb-shaped plate seals prevent condensate and gas leakage; factory-tested for airtightness.
Low Emissions & Quiet – Large furnace with ultra-low NOx (<30mg/Nm³) burner, internal flue insulation, and smoke-free micro-positive pressure combustion.
Excellent Insulation – Aluminum silicate fiber and refractory cement keep furnace shell temperature below 45℃, minimizing heat loss.
High Efficiency – Narrow-wall tube cold wall design improves air tightness and thermal efficiency.
Durable Observation Ports – High-aluminum refractory materials prevent overheating damage.
Easy Inspection – Fire viewing holes, rear inspection door, and accessible layout simplify cleaning and maintenance.
Long Service Life – Membrane-structured front and rear walls last over 20 years.
Enhanced Durability – Anti-shake fasteners and 100% radiographic inspection eliminate tube bundle fractures.

Gas Fired Double Drums Steam Boiler Technical Parameter

Model			SZS10	SZS15	SZS20	SZS25	SZS30	SZS35	SZS40	SZS50
Rated Evaporation		t/h	10	15	20	25	30	35	40	50
Rated Steam Pressure		Mpa	1.25(1.6)
Rated Steam Temp.		℃	194(204)
Rated Inlet Water Temp.		℃	20(104)
Designed Heat Efficiency		%	92.8	92.9	93	93	93.1	93.1	93.2	93.2
Designed Ambient Temperature		℃	20
Weight		T	30.6	40	45	48	52	59	65	70
Boiler Operating Water Volume		T	8.2	10.8	13.3	15.4	19.5	23.2	28.6	32.5
Boiler Full Water Volume		T	10	13.5	16.3	18.6	22.8	27.5	34.5	38.6
Burning Method			Micro Positive Pressure Chamber Combustion
Natural Gas		Nm3/h	790.3 (691.1)	1173.2 (1016.6)	1545.3 (1342)	1950.2 (1700.2)	2340.6 (2035.6)	2730 (2381.2)	3115.4 (2710.5)	3898.2 (3395.6)
Diesel Oil		Kg/h	679.3 (599)	1000 (895.3)	1323.9 (1161)	1698.5 (1496.5)	2039 (1801.2)	2380.2 (2101.1)	2705.6 (2385.4)	3398.4 (2999.2)
Transportation Size	L	mm	7700	9270	9650	9650	10850	11780	12820	12820
	W		2750	3450	3530	3710	3890	4150	4270	4390
	H		3680	3800	3950	4050	4200	4250	4300	4400
Installation Size	L	mm	9200	12340	12820	12820	13860	14790	15830	15830
	W		4478	5800	6200	6450	6700	7000	7300	7600
	H		4365	4450	4600	4700	4850	5000	5100	5200
Water Inlet	DN	mm	50	50	65	65	80	80	80	100
Main Steam Outlet	DN	mm	150	150	200	200	200	250	250	300
Secondary Steam Outlet	DN	mm	50	50	50	50	50	50	50	50
Manual Sewage Outlet	DN	mm	50	50	50	50	50	50	50	50
Continuous Sewage Outlet	DN	mm	40	40	40	40	40	40	40	40
Safety Valve	DN	mm	2*80	2*100	2*100	2*125	2*150	2*150	2*150	2*150
Chimney Diameter		mm	Ø800	Ø 950	Ø 1100	Ø 1200	Ø 1300	Ø 1400	Ø 1500	Ø 1650
Remark 1: Above all data according to standards of natural gas low position calorific value8400kcal/Nm, diesel low position calorific value 10250kcal/kg. Remark 2: Due to continuous improvement, we reserve the right to modify the appearance& specifications. The above parameters are for reference only, please refer to the final drawing.