High-heat-preservation vertical gas-fired hot water boiler

The utility model provides a high-heat-preservation vertical gas-fired hot water boiler which comprises a boiler shell, a combustor is arranged on the side wall of the bottom of the boiler shell, the end of the combustor is connected with a large hearth, the large hearth is arranged in the boiler shell, and an energy-saving mechanism is further arranged in the boiler shell. According to the high-heat-preservation vertical gas-fired hot water boiler, high-temperature flames are sprayed out through the combustor to flush the large hearth, generated smoke enters the annular smoke pipe from the first smoke pipe, the smoke flowing-out speed is reduced through the annular smoke pipe, water in the boiler shell is heated or subjected to heat preservation through heat of the smoke, finally, the water is discharged from the second smoke pipe, and resource recycling is achieved. 本申请提供了一种高保温立式燃气热水锅炉，包括：锅炉壳体，锅炉壳体底部侧壁设有燃烧器，燃烧器端部与大炉膛连接，大炉膛设置在锅炉壳体内部，锅炉壳体内部还设有节能机构。本申请提供的高保温立式燃气热水锅炉，通过燃烧器喷出高温火焰冲刷大炉膛，产生的烟从第一烟管进入环形烟管内，通过环形烟管降低烟流