ZOZEN SZS series gas-fired and oil-fired steam boiler has the advantages of high efficiency and energy saving. This series of boiler adopts double drum with full membrane structure. The SZS series boiler adopts flue gas backflip technology, with the economizer and condenser to improve the thermal efficiency to 98% and above.
ZOZEN Boiler provided several sets of gas-fired steam boilers to the distributed energy resource park in Jiangsu Province, China. This industrial park used steam boilers for power generation and heating supply for the auto tyre producer. Therefore, ZOZEN Boiler customized several sets of boilers with different parameters to this project.
ZOZEN will test the leak-proof air pressure of every set of SZS series boiler before delivery. Poor tightness will lead to the leakage of gas fuel, which will not only affect the safe operation of boiler, but also increase the heat loss. The leak-proof air pressure test can secure the tightness of each SZS series gas boiler.
The 3 sets of 29 MW gas-fired hot water boilers serving for Jin-an Thermal Power in Tianjin were installed in 2015. The boiler is a common type for central heating which adopts the full membrane wall structure and a D-type layout. It has the characteristics of micro-positive pressure combustion, no air leakage, low heat loss caused by exhaust gas and high thermal efficiency. During the boiler manufacturing process, ZOZEN Boiler emphasizes that the welding of each baffle must be tight, and the height of welding leg should meet the requirements specified on the design drawing to ensure the leakproofness of the boiler. In addition, ZOZEN Boiler also sets strict welding standards for detailed parts including the door opening and kiln eye to prevent the high-temperature flue gas from leaking.
The packaged structure is another characteristic of ZOZEN boiler. After the gas/oil-fired thermal oil heater is delivered to the project site, it can be put into use only by connecting the gas/oil, electricity, which can save a lot of installation costs. What's more, the boiler has the patented equipment to completely remove the moisture from the thermal oil heater after the hydraulic pressure test and reduce the oil dewatering time. Take the 6 million kcal as an example, it usually takes 10 days for oil dewatering while ZOZEN only needs 2 days, which reduces the 80% time for dewatering and directly save the costs for about 30,000 RMB.
This is ZOZEN thermal oil heater adopts the multi-circuit coil design with sufficient heating surface and good heat transfer effect which effectively protect the burner and furnace wall. The boiler adopts high-quality refractory and thermal insulation materials which can well reduce the heat loss based on the different refractory and thermal insulation structure for areas with different temperatures. In addition, based on the actual conditions, we also add the waste heat boiler, economizer, air pre-heater and other energy-saving equipment to make exhaust gas temperature to less than 90℃ and the thermal efficiency to reach over 95% and to help the enterprise reduce consumption and the costs.
ZOZEN energy-efficient WNS series gas/oil-fired steam boilers have two-pass and three-pass structures. This series of boilers adopt the large-diameter corrugated furnace and threaded smoke tubes with high heat transfer efficiency. With the economizer at the end of the flue gas duct, they can enlarge the boiler's heating surface, lower the exhaust gas temperature to 60℃ and improve the boiler's thermal efficiency to over 98%. ZOZEN WNS 8 tph steam boilers are applied in the food, chemical and heating industries.
