Condensing gas steam boiler furnace water wall and convection flue all adopt membrane wall structure, good sealing, high heat absorption rate, and effectively reduce the use and maintenance of firebrick workload. SZS type condensing boiler adopts high thermal resistance material as insulation layer, good thermal insulation performance. The tail is arranged with energy-saving condenser, which can effectively reduce the smoke exhaust temperature. The boiler has high thermal efficiency and a new patent certificate. The utility model name: a three-return low-nitrogen condensing steam boiler.

SZS series boiler body for double drum, vertical, chamber combustion D type layout structure, the right side of the furnace, the left side of the convection tube bundle. The movable support in the middle and at both ends of the lower barrel is fixed on the chassis of the body, and ensures the overall expansion of the boiler to both ends. The series steam boiler furnace is surrounded by narrow spacing tube membrane wall, the membrane wall on the left side of the furnace is completely sealed off from the convection tube bundle, and the rear of the convection tube bundle is a dilated cupola structure. The front part of the boiler is in a sequential structure. The flue gas produced by furnace combustion enters the burnout chamber and convection bundle area from the smoke outlet at the tail of the furnace, and then turns into the spiral finned tube economizer and condenser from the front part of the left side of the boiler, and finally enters the flue into the chimney and drains to the atmosphere.

This series of gas-fired boilers meet the current requirements of low nitrogen emission standards (NOx≦30mg/NM3), can be well adapted to the environmental policy of more stringent areas. Gas steam boiler can be widely used in chemical industry, paper making, machinery, food processing, pharmaceutical production, wine industry, building materials processing, fire prevention materials processing, etc. The top of SZS type condensing boiler is equipped with explosion-proof door, which can discharge the energy released by the explosion of the chamber. Considering the overall transportation requirements of the boiler, the design of the boiler is more compact. In addition, the boiler adopts quick loading structure, which can effectively shorten the installation period.

This series of steam boilers have a surplus heating surface and a large enough steam and water space to ensure the stability of the boiler parameters. Some furnace types use water spray desuperheater, which can adjust the temperature sensitively and with a large range of temperature adjustment. All the above values are based on natural gas (LNG) low calorific value 8,400kcal/Nm³, city gas (CG) low calorific value 4,000kcal/Nm³, coke oven gas low calorific value 4,200kcal/Nm³, diesel low calorific value 10,200kcal/kg , The low calorific value of methanol is 4650kcal/kg as standard calculation. According to user needs, Zozen Boilers can provide other special types of boilers.

SZS type condensing boiler adopts the design idea of flue gas step waste heat recovery, and the flue gas condenser is set at the tail of the boiler body. In reducing flue gas temperature (<100℃), improve boiler efficiency and reduce harmful components in flue gas. Boiler heating surface layout is reasonable, technical parameters are appropriate, heat transfer area is surplus, so it has a certain overload capacity. SZS series condensing steam boiler flue gas and working medium using countercurrent layout, average temperature and pressure is large, heat transfer is good, furnace volume selection is reasonable, to ensure full combustion of fuel.