Hot air circulating drying machine

Abstract

The invention discloses a hot air circulating drying machine. The hot air circulating drying machine comprises a drying oven provided with a containing cavity, an end cover and a collection tank, wherein the drying oven is airtightly covered with the end cover; the collection tank is communicated with a discharge port of the drying oven; the end cover is provided with an air outlet and at least one feed port; a funnel unit is arranged under each feed port; each funnel unit comprises at least two funnels which are communicated; each funnel comprises an inverted conical part, the inverted conical part of the lower funnel is larger than that of the upper funnel; and the upper inverted conical parts are provided with a plurality of drying through holes; the drying oven is connected with a hot air circulating unit. The hot air circulating unit comprises a hot air blower, an air supply pipe, a filter and an air outlet pipe connected with the filter. A filter screen is fixed to the air outlet. At least one fan unit is fixedly arranged on the inner sidewall of the drying oven and located on one side of the funnel units. By adopting the hot air circulating drying machine, materials are heated evenly, the drying effect is good, and drying hot air can be cyclically utilized.

Description

Technical field: [0001] The invention relates to the technical field of drying equipment, in particular to a hot air circulation dryer. Background technique: [0002] The dryer is mainly used in the granulation of pharmaceutical, food, pesticide, chemical fertilizer and other industries and the drying of powdery or granular wet materials. During the drying process of the dryer in the prior art, the material is heated unevenly, which is specifically manifested in that the material near the heating device is heated at a higher temperature, while the material far away from the heating device is heated at a lower temperature. The difference in temperature It is not conducive to the drying of materials and affects the drying effect of materials. In addition, the material of the existing dryer enters from the feed port and is dried once and then discharged directly from the discharge port. The drying is not complete, and the heating energy of the dried material cannot be recycled...

AI Technical Summary

Problems solved by technology

During the drying process of the dryer in the prior art, the material is heated unevenly, which is specifically manifested in that the material near the heating device is heated at a higher temperature, while the material far away from the heating device is heated at a lower temperature. The difference in temperature It is not conducive to the drying of materials and affects the drying effect of materials

In addition, the material of the existing dryer enters from the feed port and is dried once and then discharged directly from the discharge port. The drying is not complete, and the heating energy of the dried material cannot be recycled, which wastes resources.

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