Condensing gas-fired steam boilers have a large heat exchange area and a high condensation rate of water vapor in the flue gas. It can fully absorb the heat released by the condensation of water vapor in the flue gas, and the thermal efficiency can be as high as 99%. The low nitrogen condensing boiler adopts the convection heating surface of the threaded flue pipe, which effectively improves the heat transfer efficiency of the boiler. The boiler economizer, condenser and boiler are arranged as a whole, which is quick to leave the factory, easy to install, compact in structure and elegant in appearance. Small footprint, reducing infrastructure investment.
The low nitrogen gas boiler economizer, the spiral finned tube of the condenser and the shell are made of acid corrosion-resistant ND steel material, which greatly improves the service life of the equipment. The combination of intelligent combustion control and automatic safety interlock protection system ensures economical, environmental protection and safe operation. In the exhaust heat loss of this series of gas boilers, in addition to the sensible heat of the flue gas, water vapor also takes away a large amount of latent heat of vaporization. By reducing the exhaust gas temperature, all or part of the water vapor in the flue gas can be condensed, and the latent heat released during the condensation process can be recovered and utilized, the effective heat utilization of the boiler will increase, and the thermal efficiency of the boiler will be significantly improved.
Gas steam boilers focus on key technical factors such as the relationship between the condensation rate of water vapor in the flue gas and the exhaust gas temperature, the relationship between the condensation rate and thermal efficiency, and the corrosion rate of condensed water to different steel grades. Through reasonable design of the heating surface, the exhaust gas temperature is reduced. Ensure that the water vapor in the flue gas reaches the condensation rate required by the design, so that the thermal efficiency of the boiler is greatly improved. The low nitrogen condensing boiler adopts large size furnace structure and flue gas recirculation technology. This series of boiler products can achieve ultra-low nitrogen emission, NOX emission ≤30mg/Nm3.
The fuel of this series of steam boilers enters the burner from the external air source and generates high temperature flame through automatic adjustment and automatic ignition function. It enters the burnout chamber from the front end of the furnace, and enters the convection heating surface on the upper side of the rear of the burnout chamber. It enters the convection heating surface through the upper part of the front smoke box and leaves the boiler from the rear of the rear smoke box to the chimney and is discharged into the atmosphere. If the smoke and dust are generated due to improper ventilation, it can settle in the front and rear smoke boxes and the burnout chamber respectively, and the inspection door can be opened to clean them all. The working fluid is heated to generate saturated steam and output to the operating system from the main steam valve.
The low nitrogen condensing boiler body has complete safety accessories to ensure safe and economical operation. This series of boilers can be widely used in papermaking, packaging, chemical industry, building materials, hotels, hospitals, pharmaceutical industries, enterprises and institutions with steam. The gas steam boiler is slightly positive pressure combustion, fully extended. The combustion heat load is low, and the emission of harmful substances NOx is low. The main welding seam of the boiler is welded by butt connection, and X-ray and ultrasonic non-destructive testing are carried out to ensure that the welding quality meets the requirements.
