Product Description

   Adopt D-type layout, natural circulation, double drum water tube boiler, drum vertical arrangement, full membrane water wall structure, slight positive pressure combustion.

    The furnace is covered by a membrane wall. From the exit of the furnace, the flue gas enters the convection tube bundle connected between the upper and lower drums. After the flue gas flows through the convection tube bundle, it enters the heating surface at the tail-ND steel spiral fin economizer, condenser , And finally pass the flue into the chimney and exhaust to the atmosphere.

Performance characteristics

     1. Full-membrane wall structure, the body does not leak air, the heat loss of exhaust gas is small, and the thermal efficiency is high;

     2. Compact structure, small installation volume, saving investment;

     3. The steam boiler adopts natural circulation and adopts a larger section ratio, and the hot water boiler adopts forced circulation, and the water circulation is safe and reliable;

     4. Equipped with well-known high-efficiency brand burners, auxiliary machines and accessories to achieve fully automatic operation;

     5. The feed water pump adopts continuous electric adjustment, and has the function of high and low water drop alarm interlocking protection;

     6. The furnace is equipped with inspection holes, which provides great convenience for use and maintenance. The furnace top is equipped with an explosion-proof door.

working principle

     In addition to sensible heat of flue gas, steam also takes away a lot of latent heat of vaporization. If all or part of the steam in the flue gas is condensed by reducing the exhaust gas temperature, and the latent heat released from the condensation process is recycled, the effective utilization heat of the boiler will increase, and the thermal efficiency of the boiler will be significantly improved.

     SZS low nitrogen condensing gas fired boiler aims at the key technical factors such as the relationship between steam condensation rate and exhaust gas temperature, the relationship between condensation rate and thermal efficiency, and the corrosion rate of condensate water to different steel grades,Through the reasonable design of heating surface and the low and high water to reduce the exhaust temperature, the condensation rate of water vapor in the flue gas can meet the design requirements, and the thermal efficiency of the boiler can be greatly improved.

     Due to the large-scale furnace structure and flue gas recirculation return technology, for gas-fired boilers, ultra-low nitrogen emissions can be achieved, and NOX emissions ≤30mg/Nm3.