a dryer

Abstract

The invention discloses a drying machine which comprises an outer cylinder. An inner cylinder coaxial with the outer cylinder is arranged in the outer cylinder, a feeding shell is arranged at one end of the outer cylinder, a gas inlet pipe is arranged in the feeding shell, a hopper is arranged above the feeding shell, and a hygrometer is arranged in the hopper. A first feeding funnel and a second feeding funnel are arranged at a discharging opening of the hopper. A support is arranged on the feeding shell and connected with a vibration bar through a vibration motor, and the vibration bar stretches in the hopper. The inner wall of the outer cylinder and the inner wall of the inner cylinder are provided with hook-shaped lifting boards, the outer wall of the inner cylinder is connected with the inner wall of the outer cylinder through an arc support, and an arc lifting device is arranged on the outer wall of the inner cylinder. According to the drying machine, dried fertilizer particles are good in appearance, little in powder and high in yield, the feeding amount can be effectively scattered, and smooth feeding is facilitated.

Description

technical field [0001] The invention relates to a granular fertilizer production equipment, in particular to a dryer. Background technique [0002] At present, the traditional dryer is also called a single cylinder dryer because it has only one drying cylinder. The drying process is: the dry wet material is sent to the hopper by the belt conveyor or bucket elevator, and then enters the feeding end through the feeding pipe of the feeding machine of the hopper. The inclination of the feeding pipe should be greater than the natural inclination of the material so that the material can flow into the dryer smoothly. The drum of the dryer is a rotating drum that is slightly inclined to the horizontal line. The material is fed from the higher end, and the heat carrier enters from the lower end, and contacts with the material in countercurrent, and some heat carrier and material flow into the cylinder simultaneously. With the rotation of the cylinder, the material moves to the low...

AI Technical Summary

Problems solved by technology

[0003] Since the single-cylinder dryer is a general-purpose dryer, the wet granulated fertilizer to be dried after being balled into balls has high moisture content and low strength. When it enters the drying cylinder, due to the diameter of the dryer, If it is too large, the granular fertilizer with high moisture content will fall from the high end to the low end of the cylinder, and the granular fertilizer will be easily broken; from the front end to the rear end of the dryer cylinder, the fertilizer particles will fall repeatedly, which will easily cause the appearance of the fertilizer particles to be poor. Too much powder, low yield

The structure of the double cylinder dryer makes it impossible for the dryer to feed evenly. Most of the material enters between the outer cylinder and the inner cylinder, while the material in the inner cylinder is very small, so the double cylinder drying cannot be effectively used. The advantages of machine structure are used to dry granular fertilizers; granular fertilizers with different components contain different moisture after they are pelletized. For granular fertilizers with high moisture content, they are easy to agglomerate in the feeding port, which is not conducive to smooth feeding.

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