TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Components: In the moving bed dry distillation furnace heated by radiant tube and circulating air flow comprehensively, the upper bottom is made of steel plate and the lower bottom comprises heat insulating material; a water seal tank sealing device or a sand seal sealing device is arranged between the furnace wall and the movable furnace bottom; the plane shape of the hearth is annular and the furnace bottom is an annular furnace bottom; the furnace bottom can horizontally rotate in the hearth; the plane shape of the hearth is rectangular and the furnace bottom can reciprocate in the hearth; the plane shape of the hearth is straight; one of the furnace bottom can be moved in and the other end can be moved out from the hearth; the radiant tube heating device comprises a steel made pipe; the terminal end of the steel made pipe is equipped with a combustor and the shape of the steel made pipe comprises one or more of straight pipe, U-shaped pipe and W-shaped pipe; the combustor comprises a regular combustor having combustion-supporting gas that is not pre-heated or is pre-heated by a heat exchanger, a thermal storage combustor having combustion-supporting gas that is pre-heated by a thermal storing body, or a thermal storage combustor having air and fuel gas that are pre-heated by the thermal storing body; the air circulating device comprises one or more circulating blowers; the circulating blowers and the furnace wall are provided with a gas absorbing opening and a gas spraying opening; the gas absorbing opening is rightly faced to the hearth space on the upper side of the furnace bottom and the gas spraying opening is rightly faced to the empty space of the furnace bottom; or the gas absorbing opening is rightly faced to the empty space of the furnace bottom and the gas spraying opening is rightly faced to the hearth space on the upper side of the furnace bottom; there are one or more gas spraying openings and gas spraying openings; and the gas spraying opening and the gas spraying opening are arranged on one side of the dry distillation furnace or are arranged on two sides of the dry distillation furnace respectively.