Means for drying of a particulate material with a gas

摘要

A device to bring a gas into contact with a particulate solid bulk material, comprising a first and a second tubular, radially gas-permeable element (1, 2) having different diameters and which each define a central axis, wherein one of the elements is essentially coaxially placed in the second element, wherein the elements (1, 2) internally define a ring-shaped shaft (30) for a material (40) that is to be contacted by the gas, wherein the elements have essentially vertically oriented axes, a ventilation device (50) for compelling the gas radially through the shaft and the material, a first device (41) for addition of the material to an upper end of the shaft (30) and a second device (31-36) for output of dried material from the lower end of the shaft. Driving means (12) are provided for internal displacement of the elements (1, 2). At least one of the walls is provided with at least one screw line ramp which maintains a high porosity and a controlled feeding of the material.

主权项

1. A device to bring a gas into contact with a particulate solid bulk material, comprising a first and a second tubular, radially gas-permeable element having different diameters and which each defining a central axis, wherein one of the elements is essentially coaxially placed in the second element, wherein the elements, mutually define a ring-shaped shaft for a particulate material which is to be contacted by the gas, wherein the elements have essentially vertically oriented axes, a ventilation device for compelling the gas radially through the shaft and the material, a first device for addition of the material to an upper part of the shaft and a second device for output of dried material from a lower part of the shaft, wherein the elements on their side facing the material carry at least a screw line ramp, and at least one of the elements is turnable, wherein the turnable element is liftable so as to achieve an axial relative displacement between the elements and said screw line ramp is arranged so that a rotational movement of the turnable element carrying said screw line ramp around the central axis arises through the influence of said at least one screw line ramp in combination with the particulate solid bulk material.