Tianjin Xincheng Heating Station is an important heating unit in Beichen District, Tianjin. It covers a wide range of heating areas and can meet the heating area of more than 2 million square meters and achieve high-quality heating at 18°C±2°C. The gas-fired heating boiler selected by Xincheng Heating Station is ZOZEN SZS series hot water boiler.
ZOZEN energy-saving oil-fired boiler can be divided into steam boiler, hot water boiler and thermal oil heater. Heating temperature up to 320℃ under normal pressure is one of the unique advantages of energy-saving oil-fired boiler with heat conduction oil. ZOZEN energy-saving oil-fired thermal oil heater adopts three-loop coil tube design, and the end of the coil tube adopts necking coil tube, with reasonable distribution of convection section, high safety factor and thermal efficiency of over 95%.
Boiler header is a kind of large-diameter pipe connecting several heating surface pipes. It is made of seamless steel pipes with welding heads at both ends, and there are many pipe holes on the header body for welding or expanding pipes. The boiler header collects or distributes the steam-water working medium, to reduce the transmission connecting pipes of working medium and the number of tappings in the drum, which can improve the safety of the drum.
Membrane wall refers to the water wall composed of airtight tube screen welded by flat steel and pipes. Membrane wall can ensure that the furnace has good air tightness, which can significantly reduce the air leakage coefficient of the furnace and improve the combustion conditions in the furnace for negative pressure boilers.
Boiler X-ray inspection is based on the difference in the absorption of X-rays by different material thicknesses. The X-ray inspection of boiler is to show the internal defects of materials, parts and welds from the film and image by using the X-ray perspective photography and real-time imaging of industrial television. Such as crack, shrinkage cavity, air hole, slag inclusion, undissolved, incomplete penetration and etc. The quality of materials or products can be evaluated by observing the nature, size and position of defects, so as to prevent major accidents caused by internal defects and poor processing of materials.
SZS series boiler is designed with longitudinal double drums and " D " type chamber structure. Furnace is placed on the right and convection tube bank is on the left, super heater is arranged at convection tube bank. The body is fixed on the basement by middle and both end flexible supports and make the boiler expand horizontally sideways. Around the furnace is membrane water cooling tube wall. Furnace and tube bank are totally separated by the membrane water tube cooling wall at the left side of the furnace. The back part of bundle is sparse shift structure, front part is aligned structure. Smoke from furnace outlet enters re-burning chamber, convection tube bank area and then from left front part enters spiral fine coil economizer and condenser, and finally is discharged to atmosphere through chimney.
In the process of milk powder production, a large amount of steam is required in various process steps such as sterilization, concentration and drying. ZOZEN provided several sets of SZS series gas-fired steam boilers for this milk powder company. This series of gas-fired boilers adopts water-cooled full-membrane wall structure and conducts air-tightness test before heat preservation to ensure that the boiler has no cross-smoke phenomenon during micro-positive pressure combustion, which also hel...
