Oil and Gas Fired Hot Water Boiler

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Hot Water Boiler
Oil and Gas Fired Hot Water Boiler

Rated steam output: 6-40t/h
Rated working pressure: 1.25-3.82Mpa
Fuel type: natural gas, heavy oil, light oil, city gas and methane.

Application

This hot water boiler uses natural gas and oil as fuel. It is widely used for heating cold areas, as well as provide heat for residential central heating, hospitals, schools, hotels, fitness centers and factories.

All products of this type are sent out completely to ensure that the boiler can be installed quickly on site. With the exception of accessories for water supply, gas supply and electrical connection, the customer will receive all parts for the boiler at once, so there is no need for later construction or special installation processes. Extensive testing and debugging is carried out before the boiler leaves the factory, in order to ensure the final quality.

Technical parameters:

Type		WNS1.4	WNS2.8	WNS4.2	WNS5.6	WNS7	WNS10.5	WNS14
Rated steam output( t/h )		1.4	2.8	4.2	5.6	7	10.5	14
Rated working pressure (Mpa)		0.7	0.7	1.0	1.0	1.0	1.25	1.25
Rated steam temperature(℃)		95	95	95	95	95	115	115
Water supply temperature(℃)		70	70	70	70	70	70	70
Circulating flow( m³/h)		48	96	144	193	241	201	267
Boiler volume( m³ )		6.7	7.1	9.8	11.5	13.8	16.1	20.4
Design thermal efficiency( % )		92-100%	92-100%	92-100%	92-100%	92-100%	92-100%	92-100%
Dimension	Length (mm)	5037	6020	6860	7600	8160	8850	9450
	Width (mm)	2280	2650	2800	3000	3000	3200	3430
	Height (mm)	2240	2684	2882	3110	3200	3560	3570
Boiler weight( t )		7.2	12.3	15.1	17.2	20.7	31.3	39.8
Inlet and outlet pipe diameter DN( mm )		100	150	200	200	200	200	200
Safety valve diameter DN ( mm )		50× 2	50× 2	65× 2	865 × 2	80 × 2	100 × 2	100 × 2
Chimney diameter( mm )		350	450	600	700	750	900	1000

Boiler welding process

The boiler shell is made using submerged arc welding, with all longitudinal and circumferential welding undergoing 100% radiographic testing to ensure the welding effect. An automatic argon welding process is used in the boiler smoke tube and tube plate.

Heat insulating material for the boiler

Aluminum silicate fiber and refractory mortar.
The boiler temperature is controlled under 50℃.

System composition

The boiler consists of a heated surface, burner, convection pipe bundle of flue gas, heat recovery equipment, pump, instruments, valves and water treatment system.

1. Heated surface
The heated surface consists of a furnace, shell, tube sheet, long smoke tube and short smoke tube.
Features: It uses a wet-back structure, and avoids a back tube sheet that easily burns out, as it can withstand a high temperature gas flow in order to ensure the safety and reliability.

Corrugated furnace

2. Combustion chamber
The combustion chamber uses a corrugated furnace to effectively reduce the thermal stress of boiler, which can improve the reliability and service life of boiler.

Threaded tube

3. Convection tube bundle of flue gas
The bundle uses a spiral pipe with a high heat transfer coefficient in order to strength the heat transfer through convection, thus improving the boiler’s overall thermal efficiency.

Spiral finned tube