SZS Series Oil/Gas Fired Hot Water Boiler

SZS Series Hot Water Boiler Introduction

SZS boiler body is the structure of longitudinal double drums and D-type chamber combustion. The furnace is on right side and the convection tube bundle are on left side. The flexible supports of boiler are in the middle and two ends of the lower drum, and it can secure the whole boiler body to expand sideways. There are narrow-space membrane cooling tube walls on the four sides of furnace. The left membrane wall makes the furnace and the convection tube bundle separated. The rear of convection tube bundle is a kind of tube-decreasing and staggered structure, and the front is an aligned structure. The flue gas generated from furnace combustion flows from the rear outlet of furnace into the end of combustion chamber, convection tube bundle area, and then turns from the front-left of furnace to the spiral finned tube economizer, and next flows into smoke duct and chimney and finally exhausts into atmosphere.

Digitized manufacture

1. Boiler body uses the forced circulation in the high temperature area to make sure all heating areas can be cooled down and avoid vaporization;
2. The explosion door and flame detector are equipped for safe and reliable operation;
3. Comb plates are used between both sides of boiler and tube bundle to avoid leakage of condensate and gas caused by using refractory concrete as sealing material;
4. Air proof test is done before delivery in the factory to guarantee any gas leakage problem.

Environment-friendly

1. Big combustion chamber equipped with Low emission combustion burner effectively reduce the NOx to 30mg/m3.
2. Smoke duct and smoke outlet use internal insulation to reduce operating noise.
3. Combustion chamber uses full membrane water cooling wall structure and pressurized combustion without smoke mixture.

Energy-saving

1. Good quality alumina silicate fiber and fire clay insulation material are used and the boiler body temperature is controlled below 45℃ and greatly heat loss is reduced.
2. Combustion chamber is designed with narrow distance tube membrane water cooling wall which has good air proof to reduce heat lost and increase boiler thermal efficiency.
3. Internal inspection holes uses high-alumina refractory and manhole cover seal devices, solving superheat problem in this part caused by using refractory bricks.

Convenience

Manholes are placed on the front and back side of drums and inspection doors on back side of boiler easy to open for inspection and clean inner and outer parts.

Longer working life

1. Membrane structure are used in the front and back wall for boiler body and highly increased their lifespan to over 20 years.
2. The key processes including material cutting, rolling, drilling are done by advanced CNC machining process to reduce the assembly stress and extend boiler service lifetime.
3. Flutter prevention fastener is used for high temperature part convection tubes, which avoid convection tube cracking problem.
4. Longitudinal and girth joint adopt advanced automatic submerged-arc welding for good welding quality. All longitudinal and girth joint will be tested by radiographic inspection.

SZS Series Hot Water Boiler Specification

Model	Rated thermal power (MW)	Rated working pressure (MPa)	Rated output water temperature (℃)	Rated Feeding water temperature (℃)	Maximum transport weight (t)	Maximum transport dimension (m)
SZS7-1.0/115/70-Q(Y)	7.0	1.0	115	70	34	7.58×3.85×3.75
SZS10.5-1.0/115/70-Q(Y)	10.5	1.0	115	70	38	7.91×3.85×3.75
SZS14-1.25/115/70-Q(Y)	14.0	1.25	115	70	36	8.31×3.85×3.73
SZS17.5-1.25/115/70-Q(Y)	17.5	1.25	115	70	48	9.22×3.90×3.72
SZS21-1.25/130/70-Q(Y)	21.0	1.25	130	70	51	10.30×4.23×4.13
SZS29-1.25/130/70-Q(Y)	29.0	1.25	130	70	59	11.10×4.32×4.16
SZS46-1.6/130/70-Q(Y)	46.0	1.6	130	70	Assembled parts 40/45	11.30×4.09×3.89 11.40×2.85×4.20
SZS58-1.6/130/70-Q(Y)	58.0	1.6	130	70	Assembled parts 42/48	11.40×4.29×4.10 11.4×3.15×4.20
SZS70-1.6/130/70-Q(Y)	70.0	1.6	130	70	Bulk items 16	12.00×Φ1.66
SZS116-1.6/130/70-Q(Y)	116.0	1.6	130	70	Bulk items 20	12.50×Φ1.66