Material dryer

Abstract

The invention discloses a material dryer. The material dryer comprises a heat supply unit and a roller used for rolling drying materials, wherein a material inlet and a material outlet are formed in the two sides of the roller separately, and a material adding machine is arranged at the material inlet; the heat supply unit is connected with one side of the roller, and an induced draft fan is arranged in the roller; and one section close to the material inlet, in the roller, is a material high-temperature mixing area, one section close to the material outlet, in the roller, is a dry material and wet material separation area, and a material dryness screening area is formed between the material high-temperature mixing area and the dry material and wet material separation area. The device is capable of realizing concentrated material lifting and uniform material lifting in a drying process by virtue of the own rolling of the materials, and then realizing extinguishment for flame capable ofcombusting combustible materials in a sectioned manner, and increasing the contact area of hot air and the materials, so that efficient and safe drying for the combustible materials is realized.

Description

technical field [0001] The invention belongs to the technical field of material drying, in particular to a material drying machine. Background technique [0002] There are many types of dryers, and the structure of the dryer is also very different depending on the object to be dried; but in a word, the dryer relies on a large flow of high temperature to make the moisture in the object instantly turn into water vapor. String into the material and flow under it, quickly take away the moisture, so as to achieve the purpose of drying the material. [0003] Under normal circumstances, there are many difficult problems in the drying of combustible objects in the existing drying equipment; firstly, if the material is wood powder or sawdust, the high-temperature flame used for drying will be ignited in a direct contact with it, so give Drying biomass materials like wood flour presents challenges. [0004] Now most of them will build two fire-retaining walls in front of the fire ha...

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Problems solved by technology

[0003] Under normal circumstances, there are many difficult problems in the drying of combustible objects in the existing drying equipment; firstly, if the material is wood powder or sawdust, the high-temperature flame used for drying will be ignited in a direct contact with it, so give Drying biomass materials like wood flour presents challenges

[0004] Now most of them will build two fire-retaining walls in front of the fire hall to prevent the flame from directly entering the drying furnace. This will prevent the material from igniting but will also seriously affect the drying rate and cause waste of fuel and energy; while most current dryers It can only use three-pass, that is, "tube-in-tube" rolling drying equipment, with three sleeve structures inside, outside and inside, entering from the inner tube, coming out and then entering the middle tube, and coming back out from the outer tube; let the raw materials and hot air flow in the outer tube It flows in the gap between the cylinder and the inner cylinder. The cylinder of this structure is not straight through, so that once the material enters the rolling chamber, the lack of oxygen makes it difficult for the material to ignite

However, the flow rate of his induced air is seriously blocked. This method can only heat the raw materials, but it is difficult to take away the moisture in the raw materials, and the drying efficiency is not high; the dried materials can only be cooled by cooling. reduced moisture; at the same time high energy consumption

[0005] Due to the wind in the gap between the large, medium and small cylinders of the above-mentioned equipment, and there are a large amount of materials and lifting plates, the gap space is very small. Once the feeding rate increases, it will easily cause the space in the cylinder to be blocked and equipment failure will occur.

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