Steam rotary all-in-one machine and method for drying high-humidity and high-viscosity materials

Abstract

The invention provides a steam and rotation all-in-one machine and method for drying high-humidity and high-viscosity materials. The steam and rotation all-in-one machine at least comprises a scattering device, a barrel and a feeding cover. The feeding cover is communicated with the feeding end of the cylinder body, the scattering device is arranged at the feeding end of the cylinder body, and a feeding port and an air inlet are formed in the feeding cover; a material guide plate and a plurality of material lifting plates are arranged on the inner wall of the cylinder body close to the feeding end of the cylinder body, a plurality of chains are arranged between the adjacent material lifting plates, and a steam heat exchange pipe is arranged at the middle section and / or the rear end in the cylinder body; a material returning spiral pipe is arranged on the inner wall of the cylinder body, the material returning spiral pipe is opposite to the position of a material falling opening of the cylinder body, and an outlet of the material returning spiral pipe is formed behind a material guide plate at the feeding end; according to the invention, the material inlet is arranged above the end part scattering device, and high-humidity and high-viscosity materials entering the drying machine fall on the end part scattering device which runs at a high speed, are cut, scattered and thrown out at a high speed, so that the heat exchange area between the materials and air is increased, and the mass and heat transfer is enhanced.

Description

technical field [0001] The invention relates to the technical field of material drying equipment, in particular to a steam rotary integrated machine and method for drying high-humidity and high-viscosity materials. Background technique [0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art. [0003] The steam rotary dryer is a dryer that utilizes the steam heat source and indirectly exchanges heat with the material through the heat exchange tube. It has the characteristics of large operating flexibility, large single-machine processing capacity, energy saving, and no pollution to materials. It has been widely used in chemical industry and building materials. , metallurgy, soda ash and other industries. However, the steam rotary dryer has been rarely used for drying high-humidity and high-viscosity materials such as sludge and coal slime, because the phenomenon of high-humidity and hi...

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Problems solved by technology

[0004] The inventor found that the self-returning equipment needs to wind a reverse spiral tube outside the cylinder of the rotary dryer. With the rotation of the cylinder, the dried material at the lower end of the dryer is sent back to the feed end of the dryer through the spiral tube. , the spiral tube has to pass through the external structure of the cylinder such as the rolling ring and the ring gear, the size of the cast steel is increased, and the cost is increased; the structure is complex and the processing difficulty is increased, and it is currently mostly used in the soda ash drying industry;

[0005] The paddle dryer has two rotating paddle shafts. The blades are arranged alternately and clean each other. It is suitable for drying high-humidity and high-viscosity materials. However, due to the limited length of the paddle shafts, the heat exchange area is limited and the dehydration capacity is limited. Therefore, the processing volume is small;

[0006] If the return equipment is added in the subsequent process of the dryer, the general process is relatively complicated, and the equipment layout, pipeline layout and process control are cumbersome, which increases the total installed power and energy consumption;

[0007] Ordinary steam rotary dryer, the inner circumference of the dryer barrel is arranged with longitudinal heat exchange tubes, the center of the barrel leaves enough space for maintenance personnel to pass through, and the heat exchange tubes run through the entire drying space in the length direction. The tube has a certain lifting and mixing effect on the material, but the effect of drying, mixing and lifting is not good for high-humidity and high-viscosity materials;

[0008] At present, the dispersing rotary dryer is generally used for drying high-humidity and high-viscosity materials. Due to the limitation of the length of the dispersing shaft and the overall size of the equipment, the dehydration and processing capacity have reached the upper limit.

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