Coal-fired steam boiler adopts horizontal three return water and fire tube chain grate boiler, and the boiler body is longitudinal arranged with single drum. Coal fired boilers manufacturing thread pyrotechnics tubes are arranged inside the boiler drum to form a convection heating surface, and the boiler drum and two sides of the water wall to form a furnace radiant heating surface. And its combustion equipment using chain grate, the overall use of quick assembly factory, electrical control grate stepless speed regulation, limit parameter alarm and chain protection.
This series of coal-fired boilers have significant technical advantages. The key processing technologies such as steel plate blanking, ring, drum and tube plate drilling are all advanced numerical control processing, which can reduce the assembly stress and extend the service life of the boilers. At the same time, the use of steel pipe cutting, threaded pipe pressing, convection pipe processing using advanced numerical control technology. Adopt arch tube plate and screw pipe structure, increase heat conduction, completely solve the crack problem of the back tube plate. Chain grate layout, front and rear smoke box panels are cut by numerical control plasma cutting machine, neat and beautiful.
Coal fired boilers manufacturing using longitudinal seam welding, the use of advanced submerged arc automatic welding technology, to ensure the quality of welding. All longitudinal and girth welds are 100% radiographic. The welding process of smoke pipe and tube plate is preexpanding to eliminate the gap between tube and tube plate, and then automatic argon arc welding. Effectively eliminate stress and extend the service life of the boiler. Pipe seat flange welding, using robot welding. The chain grate is manufactured by our factory, and the test run is 72 hours before leaving the factory to ensure that the tightness of the grate is moderate and does not deviate.
Coal fired steam boiler manufacturing technology advanced, using automatic spinning line operation. Enhance heat transfer and improve boiler thermal efficiency. Threaded smoke pipe is an efficient heat transfer element. After continuous optimization, the selection of thread groove depth and pitch reaches the minimum flow resistance, and the heat transfer coefficient is high. Adopt the unique structure design, carry on the furnace flue gas perturbation, ensure the volatiles combustion completely.
Coal fired boilers manufacturing set independent secondary fan, air volume and air pressure is easy to control and adjust. The high temperature flue gas produced by combustion first enters the eight-shaped flue on both sides of the body from the tail, (at this time it is water-pipe type), and the flue gas flows outside the pipe. The flue gas cooled by the eight flue passes into the threaded pipe arranged in the drum by the front smoke box (at this time, it is the fire pipe). It is discharged from the rear smoke box. This design fundamentally solves the cracking problem of the tube plate of the pure fire tube boiler. Welcome to our factory for consultation and purchasing, Zozen Boilers will serve you wholeheartedly.