High temperature heat furnace

The present invention discloses a high-temperature heating furnace which can be used long term, is difficult to be blocked and easy to maintenance, is safe and reliable and has simple structure, it includes: furnace, the side wall of furnace is opened with smoke gas inlet and outlet, two ends of furnace are equipped with dismountable upper and lower closure head separately, the lower closure head is equipped with ash channel; the chamber is equipped with convective pipe bundle device consisting of several convective pipe bundle units, each convective pipe bundle unit includes several convective water pipe, each convective water pipe in each convective pipe bundle unit is connected with the aerated water guiding pipe and falling water-supply pipe through the upper and lower header in the unit, each lower header is equipped with pollution discharge pipes; said chamber includes pressure resistance barrel and several cooling water pipes which are installed on the inner wall or the outer wall of the pressure resistance barrel, heat transfer layer is installed between the cooling water pipe and pressure resistance barrel, the cooling water pipe is connected with the aerated water guiding pipe and falling water-supply pipe through the upper and lower annular header. The invention mainly is used in the catalyze and cracking device in petrochemical industry.