A wet granulator rotor structure

Abstract

The invention provides a rotor structure of a wet method pelletizer. The rotor structure is composed of a rotor shaft, stir tooth base tubes, A-type flat stir teeth, B-type flat stir teeth and the like. The main problems of a rotor structure of an existing pelletizer are characterized in that due to the fact that stir teeth are cylindrical, carbon black is pushed aside to the two horizontal sides when the stir teeth move to collide with the carbon black, a rotor only achieves the stirring function but does not achieve the axial conveying function, and the carbon black is axially conveyed completely depending on pushing of a guiding spiral plate behind the carbon black; consequently, a material bed in a pelleting cylinder is certainly thickened through structure operation; the carbon black in gaps between the stir teeth and the wall of the cylinder is maximally affected by the thickening of the material bed; the carbon black does not achieve the condition for rolling along the wall of the cylinder for pelleting, and most of the carbon black is directly extruded and discharged without being fully stirred; accordingly, the pelleting quality is not high, and especially the fine powder content exceeds the standard. In order to solve the problems, in short, the cylindrical stir teeth are all changed into the flat stir teeth, each stir tooth can stir the carbon black and axially convey the carbon black at the same time through design and installation, and a material bed in a pelleting cylinder cannot be thickened.

Description

technical field [0001] The invention relates to a carbon black production equipment, in particular to a carbon black wet granulator. Background technique [0002] The rotor structure of the current carbon black wet granulator has the following basic characteristics: 1. The shape of the stirring teeth is cylindrical, and the top of the teeth can be made into a truncated cone to reduce the thickness of the stirring head; 2. Each stirring tooth uses The screw thread is connected with the stirring tooth base pipe welded on the rotor, and the screw connection can adjust the stirring tooth length; 3. The stirring tooth is arranged in a double helix, the angle of the spiral line is about 22.5 degrees, and the horizontal projection distance of the center line of the adjacent two stirring teeth It is approximately equal to 1.7 times the diameter of the stirring tooth; 4. On the rotor below the feed port of the corresponding granulator, there is a guide screw plate welded on the waist...

AI Technical Summary

Problems solved by technology

[0003] The main problem of the above-mentioned traditional granulator rotor structure is that since the horizontal projection distance of the centerlines of two adjacent stirring teeth in the arrangement of stirring teeth is approximately equal to 1.7 times the diameter of the stirring tooth head, each helix of the granulator rotor The horizontal projection of each is a comb; because the shape of each stirring tooth head is cylindrical or truncated cone, when the stirring tooth hits the carbon black, it pushes the carbon black evenly to both sides of the stirring tooth movement direction; thus It can be seen that this comb only has the function of stirring but not the function of axial feeding; the axial feeding of carbon black is all driven by the material guide screw plate at the rear; the operation will inevitably cause the accumulation and thickening of the material bed in the granulation tube; too thick The material bed has the greatest influence on this part of the carbon black in the gap between the stirring teeth and the cylinder wall; because the material bed is too thick, this part of the carbon black cannot get the condition of "rolling and granulating along the cylinder wall", and most of them are directly extruded without sufficient stirring Discharge; this is the main reason why the product quality of the wet granulator is not high, especially the fine powder content exceeds the standard

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