“D” type boiler is composed of upper (middle), lower drum, membrane water wall, convection heat exchange tube bundle, superheater, tail economizer, condenser, etc. The combustion chamber of the D type gas boiler adopts a full-film water-cooled wall structure with good sealing performance. This design also has the characteristics of no air leakage and less heat dissipation. Effectively increase the heating surface of the boiler and greatly improve the thermal efficiency of the boiler.
The 20t/h gas-fired steam boiler has a large furnace volume and is suitable for various burner arrangements. It is convenient to arrange multiple burners. The fuel stays in the furnace for a long time, the combustion is more complete, and the efficiency is higher. The large furnace size of this series of steam boilers meets the requirements of ultra-low nitrogen combustion. Combined with the burner, the NOx emission can meet the environmental requirements of the place of use. The boiler furnace water wall and convection heat exchange surface are arranged in many ways. The boiler heats up quickly, the boiler water capacity is large, and the operation is safe and stable.
D type gas boiler adopts high-quality thermal insulation materials and special construction technology, with small heat loss and fuel saving. The gas steam boiler adopts a fully automatic burner. With ignition program control and automatic control system for overpressure, flameout, and gas leakage protection. This type of boiler adopts advanced mechatronics automatic control technology. Remote human-computer interaction and data sharing can be realized through the mobile Internet.
The D-type steam boiler is also designed with a water spray desuperheater, which is sensitive to temperature adjustment and has a large temperature adjustment range. The furnace of this type of gas boiler is surrounded by a membrane water wall. The membrane water wall on the left side of the furnace completely seals the furnace from the convection tube bundle. The rear part of the convection tube bundle area is a thinned staggered structure, and the front part is an in-line structure. The flue gas generated by the combustion of the furnace enters the combustion chamber and the convection tube bundle area from the smoke outlet at the tail of the furnace. Then turn from the left front of the boiler to enter the spiral finned tube economizer and condenser, and finally enter the flue and discharge into the atmosphere.
The use of gas-fired steam boilers is energy-saving and efficient, with thermal efficiency > 99%; fuel saving > 10%. SZS series boilers use low nitrogen and environmental protection, Nox < 30mg/m³; exhaust gas temperature < 70 ℃; the first pass rate of environmental testing is 100%. The boiler adopts a quick installation structure, which can effectively shorten the installation period. Considering the overall transportation requirements of the boiler, the design layout of the boiler is more compact.
The D type gas boiler adopts the lower support method and can freely expand upwards. The superheater is arranged in counterflow, and the surface desuperheater is used to meet the requirements of steam temperature regulation. In order to prevent the superheater tube wall from overheating, the surface desuperheater is arranged at the superheated steam inlet to ensure the reliability of the superheater operation.