Raymond mill system with draught fan free of dust retention

Abstract

The invention discloses a Raymond mill system with a draught fan free of dust retention. An air current circulation milling discharging system is formed by the draught fan, a Raymond mill, a cyclone separation discharging device and an air return duct; a pressure-equalizing exhaust branch pipe is connected with the upper end of a cyclone pipe, multiple cyclones are arranged in the cyclone pipe, the lower end of the cyclone pipe is connected with a cyclone separator in the tangent direction, and a lower pipe orifice of the cyclone separator immerges into a circulation water tank which is connected with the upper end of the cyclone pipe; and an impeller of the draught fan is of a structure that blades are in a hollow and wedged shape and the backing plate is in a disc shape, and the contour line of the appearance of the draught fan is an evolvent. According to the Raymond mill system with the draught fan free of the dust retention, due to the fact that the cyclone pipe and the cyclones are arranged, low-resistance pressure-equalizing exhaust is achieved, and dust overflow caused by positive pressure of the system is eliminated; by means of the circulation water tank, wet-method high-efficiency dust removal and mineral powder recycling are achieved; and by means of the structure that the blades are in the hollow and wedged shape and the backing plate is in the disc shape, real-time cleaning of the dust on an impeller of the draught fan is achieved, the impeller strength of the draught fan is increased, the stability is enhanced, safety accidents caused by dust accumulation is effectively eradicated, and the application prospect is wide.

Description

technical field [0001] The invention relates to a Raymond mill system, in particular to a Raymond mill system in which fans do not accumulate dust. Background technique [0002] Raymond mill system is a kind of equipment widely used in ore crushing and grinding. Due to its strong adaptability and high cost performance, it has become the first choice for ore crushing and grinding. Raymond mill is an air flow internal circulation type powder output, due to the expansion of heated gas during the crushing process, if the ore has a high water content or water enters, not only will the output of the powder be reduced, but also a large amount of gas will be caused by the vaporization of the water. swell. Therefore, all Raymond mills are equipped with pressure equalizing exhaust branch pipes to input excess gas into the bag filter for purification and discharge, so as to avoid dust leakage caused by positive pressure in the crushing system, but when the humidity of the bag is high,...

AI Technical Summary

Problems solved by technology

Once some hardened dust is shaken off by vibration, it will immediately leave the dynamic rotation balance of the fan, and then generate strong vibration, which may cause serious personnel and equipment safety accidents

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