Energy-saving emission-reducing coal fired boiler

• Main Author: WANG XUANHE
• Format: Patent
• Language: Chinese; English
• Published: 22.02.2012
• Subjects: BLASTING; CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FORCOMBUSTION CHAMBERS, e.g. FIREBRIDGES; COMBUSTION APPARATUS; COMBUSTION PROCESSES; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDEDFOR; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS INCOMBUSTION CHAMBERS; HEATING; LIGHTING; MECHANICAL ENGINEERING; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTIONAPPARATUS; WEAPONS

Provided is an energy-saving emission-reducing coal fired boiler, comprising a boiler barrel, a smoke tube, a water-cooling wall tube, a hearth, a fire grate, a coal bunker, a coal gate, a front arch and a rear arch. The energy-saving emission-reducing coal fired boiler is characterized in that the longitudinal cross section of the rear arch has a Z shape; two horizontal strokes of the Z shape are straight or are inclined at an angle of 1-30 DEG towards the front of the boiler, wherein the inclination angle is 10 DEG in an embodiment; and the turning portions between the two horizontal strokes of the Z shape are two smooth circular arcs with identical or different radians. In this way, burned powder coals in the rear portion of the hearth are retarded and returned to a certain extent by the rear arch of the energy-saving emission-reducing coal fired boiler adopting the above technical scheme, making the combustion more complete, further enhancing the thermal efficiency and meeting the emission standards.