NOVELTY - The reactor has shell body (1), feeding hole (2) at center of top end of shell body, pyrolysis gas outlet (3) arranged on side wall at upper end, heat carrier outlet (11) on side wall of lower end, and carbon powder outlet (9) at the bottom. A spiral supporting plate (8) with same spiral direction as spiral baffle plate (4) is sleeved and fixed in middle part of vertical shaft (6) not sealing a spiral slideway. The edge of spiral supporting plate is slightly larger than spiral baffle plate. A certain gap is formed between upper spiral screen stencil (7) and lower spiral baffle plate.    USE - Spiral pyrolysis reactor used for biomass powder reaction and separation.    ADVANTAGE - Provides a spiral pyrolysis reactor that integrally combines biomass powder reaction and separation devices, and that has simple structure, good sealing property and good working property.    DETAILED DESCRIPTION - The internal center of the shell body is fixed with the vertical shaft under the feeding hole. The vertical shaft is sleeved with the spiral baffle plate with gradually increasing diameter. A spiral soleplate (5) is fixed and sealed between the bottom of the spiral baffle plate and vertical shaft upwards from the middle part of the vertical shaft. The spiral screen stencil is fixed between bottom of the spiral baffle plate and vertical shaft downwards from the middle part of the vertical shaft. The spiral baffle plate, spiral soleplate and spiral screen stencil respectively make up of spiral slideways with sealed bottom and unsealed bottom. The upper end of the spiral slideway is connected to the bottom of the feeding hole. The heat carrier outlet is arranged at the inner end of the shell body and supported at the terminal end, not sealing the spiral slideway.    DESCRIPTION OF DRAWING(S) - The drawing shows the sectional view of the spiral pyrolysis reactor.    Shell body (1)    Feeding hole (2)    Pyrolysis gas outlet (3)    Spiral baffle plate (4)    Spiral soleplate (5)    Vertical shaft (6)    Spiral screen stencil (7)    Spiral supporting plate (8)    Carbon powder outlet (9)    Heat carrier outlet (11)