CN208998501U - A spiral hollow shaft and a material dryer comprising the hollow shaft - Google Patents

Abstract

The utility model discloses a kind of spiral hollow shafts, and including hollow shaft housing and the spiral hollow blade that its periphery is arranged in, the joint face of the spiral hollow blade and hollow shaft housing is equipped with connecting hole.The connecting hole is at least set in one spiral element of the spiral hollow blade.A kind of material drying machine is also disclosed, and including drying machine body and end cap and power mechanism that its two sides is arranged in, which is arranged inside drying machine body, and rotation is realized under the drive of power mechanism.The spiral hollow shaft not only ensure that leaf temperature is uniform, reduce the consumption of hot wind, it is thus also avoided that existing hollow blade axis, which leads to the problem of cooling water, influences heat exchange efficiency.The material drying machine directly or indirectly heats material, greatly improves heat exchange efficiency by being passed through hot wind into drying machine body interlayer and hollow shaft.The plant automation degree is high, and manipulation is easy, and few easy workout part, later maintenance cost is low, and substantially improves working environment.

Description

A spiral hollow shaft and a material dryer comprising the hollow shaft

technical field

The utility model relates to the technical field of material drying, in particular to a spiral hollow shaft and a material drying machine comprising the hollow shaft.

Background technique

At present, there are many types of material dryers, and the structural forms are quite different, such as tube type, disc type, tower type, drum type, airflow type, jet type, spray type, etc. Among them, the most widely used is the disc type. Type material dryer. The outer circumference of the hollow shaft of the disc material dryer is a disc-shaped disc-shaped blade that is independently distributed. During the drying process, saturated steam enters each disc-shaped blade, and after heat exchange, a large amount of If the cooling water cannot be discharged in time, it will cause problems such as low drying efficiency and long drying time of the dryer.

It can be seen that the structure, method and use of the above-mentioned existing dryer obviously still have inconveniences and defects, and need to be further improved. How to create a new spiral hollow shaft and a material dryer including the hollow shaft, so as to make it simple and reliable to avoid the generation of cooling water in the hollow shaft and improve the heat exchange efficiency, has become a target that needs to be improved in the current industry.

Utility model content

The technical problem to be solved by the utility model is to provide a spiral hollow shaft, which can simply and reliably avoid the generation of cooling water in the hollow shaft and improve the heat exchange efficiency, thereby overcoming the deficiencies of the existing material dryers.

In order to solve the above technical problems, the utility model provides a spiral hollow shaft, which includes a hollow shaft sleeve and a spiral hollow blade arranged on the outer circumference of the hollow shaft sleeve, and the connection between the spiral hollow blade and the hollow shaft sleeve There are connecting holes on the surface.

As an improvement of the present utility model, at least one of the connecting holes is set in a helical unit of the helical hollow blade.

In a further improvement, both ends of the hollow shaft sleeve are provided with air ports.

The utility model also provides a material dryer including the above-mentioned spiral hollow shaft, comprising a dryer body, end covers arranged on both sides of the dryer body, and a power mechanism arranged outside the dryer body. The hollow shaft is arranged inside the dryer body, and is driven by the power mechanism to rotate.

Further improvement, the dryer body is provided with a feed port, a discharge port, an exhaust gas outlet and an air supply port, and the feed port and the air supply port are respectively arranged at both ends of the upper part of the dryer body, and the The exhaust gas outlet is opened at the upper part of the dryer body near the side of the feed port, and the discharge port is opened at the lower part or side of the dryer body away from the feed port.

Further improvement, both ends of the helical hollow shaft protrude from the end cover, the air port of the helical hollow shaft close to the feed port side is the hot air inlet, and the helical hollow shaft close to the discharge port side is a hot air inlet. The air port of the hollow shaft is the hot air outlet.

Further improvement, the side of the dryer body is also provided with an interlayer hot air inlet and an interlayer hot air outlet, the interlayer hot air inlet is arranged on the side of the feed port, and the interlayer hot air outlet is arranged on the side. The discharge port side.

Further improvement, the lower part of the dryer body is also provided with a drain port.

In a further improvement, a transparent observation window is arranged on the upper side of the dryer body along its axial direction.

In a further improvement, a support leg is provided below the dryer body.

After adopting such a design, the utility model at least has the following advantages:

The helical hollow shaft of the utility model is the core part of the dryer, and the original structure design not only ensures the uniform temperature of the blades, reduces the consumption of hot air, but also prevents the formation of cooling water inside the blades, thus avoiding the need for the existing hollow blade shafts. The cooling water produced in the middle of the heat exchanger will affect the lack of heat exchange efficiency of the blade, and the spiral hollow blade plays an important role in drying materials.

The material dryer of the utility model directly and indirectly heats the material by introducing hot air into the interlayer of the dryer body and the hollow shaft, thereby greatly improving the heat exchange efficiency.

The material dryer of the utility model has a closed structure, and the exhaust gas is extracted by an induced draft fan, which ensures the cleanliness and harmlessness of the workshop and greatly improves the working environment of the operators. The device has a high degree of automation, easy operation, less wearing parts, and low maintenance costs.

Description of drawings

The above is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Fig. 1 is the three-dimensional structure schematic diagram of the material dryer of the present invention.

Figure 2 is a front view of the material dryer of the present invention.

Figure 3 is a bottom view of the material dryer of the present invention.

FIG. 4 is a schematic three-dimensional structure diagram of the helical hollow shaft of the present invention.

Figure 5 is a front view of the helical hollow shaft of the present invention.

FIG. 6 is a partial cross-sectional view of the hollow shaft of FIG. 5 .

Detailed ways

Referring to Figures 1 to 3, the material dryer of the present invention includes a dryer body 1, end covers arranged on both sides of the dryer, a spiral hollow shaft 2 arranged inside and a power mechanism arranged outside the dryer. . The helical hollow shaft 2 can be rotated under the driving of the power mechanism, and is used to push the material to move.

The dryer body 1 is provided with a feed port 3 , a discharge port 4 , an exhaust gas outlet 5 and an air supply port 6 . The feed port 3 and the air supply port 6 are respectively arranged at both ends of the upper portion of the dryer body 1, the waste gas outlet 5 is opened on the upper portion of the dryer body 1 close to the feed port side, and the discharge port 4 is opened at the side of the feed port. The lower part or side part of the dryer body 1 away from the feed port 3 . Among them, the feed port 3 is used for conveying high-humidity materials in the dryer body 1; the exhaust gas outlet 5 is connected to the induced draft fan, and is used to remove the carrier gas for material evaporation during the drying process of the material; the air supply port 6. It is used to supplement the gas in the dryer body during the material drying process to overcome the negative pressure inside the dryer body caused by the suction of the induced draft fan.

Referring to FIGS. 4 to 6 , the helical hollow shaft 2 includes a hollow shaft sleeve 21 and a helical hollow blade 22 arranged on the outer periphery of the hollow shaft sleeve 21 . The helical hollow blade 22 is connected to the hollow shaft sleeve 21 . There are connecting holes 25 on the surface. Both ends of the hollow shaft sleeve 22 are provided with air ports 23 and 24 .

Both ends of the spiral hollow shaft 2 protrude from the end cover, the air port 23 of the spiral hollow shaft close to the feed port side is the hot air inlet, and the air port 24 of the spiral hollow shaft close to the discharge port side For the hot air outlet.

In a preferred embodiment, at least one connecting hole 25 is set in a helical unit of the helical hollow blade 22 . In this way, because the blade is a helical hollow structure, the blade on the outer circumference of the entire hollow shaft is a complete space, which is communicated with the interior of the hollow shaft sleeve through the connecting hole, which is conducive to the passage of hot air, and is not easy to generate cooling water. The disc type hollow shaft has the defect that cooling water is easily generated. A helical unit in this application refers to a circumferential unit in a helical structure that is rotated by 360°.

In this embodiment, the side of the dryer body 1 is also provided with an interlayer hot air inlet 7 and an interlayer hot air outlet 8. The interlayer hot air inlet 7 is arranged on the side of the feed port, and the interlayer hot air outlet 8 Set on the discharge port side. In this way, in addition to the hot air passing through the hollow shaft blades, which is used to exchange heat for the materials, the interlayer in the dryer body is also fed with hot air to directly exchange heat for the wet materials and improve the heat exchange rate.

In this embodiment, the lower part of the dryer body 1 is also provided with a liquid discharge port, which is used for discharging the seepage liquid after the material enters the dryer body.

In order to facilitate the observation of materials at any time during the drying process, the upper side of the dryer body 1 is provided with a transparent observation window 10 along its axial direction, so as to timely understand the internal conditions of the dryer and improve safety.

The bottom of the dryer body 1 is also provided with support legs 9 for supporting the weight of the dryer and improving the safety and reliability of the dryer.

The working principle of the above material dryer is as follows:

The material (drying sludge, moisture content of 80-90%) is fed into the closed dryer body from the feed port 3, and the 180°C saturated hot air is transported from the hot air inlet 23 to the hollow blade through the hot air pipe. Internally, the material is indirectly heated, and at the same time, the saturated hot air at 180°C is transported from the hot air inlet 7 of the interlayer into the interlayer of the main machine, and the material is directly heated; through the rotation of the spiral hollow blade, the material is slowly transferred from the feeding port 3. Slowly send it to the discharge port 4. During the process of conveying the material, the moisture of the material is constantly evaporating, reaching the requirement of the moisture content (the moisture content of the sludge after treatment is reduced to below 30%) and then discharged from the discharge port 4. The carrier gas formed by the evaporation of the water in the waste gas is completely pumped away by the induced draft fan connected to the exhaust gas outlet 5, and transported to the rear equipment for treatment, and discharged after reaching the standard.

The daily sludge treatment capacity of the material dryer of the utility model can reach 150t, the power consumption is 20-45kw, and the heat consumption per ton of sludge is about 0.8t of hot air. The utility model has the advantages of large heat transfer area, small footprint, low steam consumption, low power consumption, strong reliability, strong continuous operation ability, and an annual operation ability of ~8000 hours. In addition, the device of the utility model has a wide range of uses, and is suitable for the fields of domestic pollution control, biological pharmacy and the like.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Those skilled in the art make some simple modifications, equivalent changes or modifications by using the technical contents disclosed above. within the scope of protection of the present invention.

Claims (10)

1. A helical hollow shaft, characterized in that it comprises a hollow shaft sleeve and a helical hollow blade arranged on the outer periphery of the hollow shaft sleeve, and the connecting surface of the helical hollow blade and the hollow shaft sleeve is provided with connecting holes, and the interior of the helical hollow blade is a helical space that communicates with each other. 2 . The helical hollow shaft according to claim 1 , wherein at least one of the connecting holes is set in one helical unit of the helical hollow blade. 3 . 3 . The spiral hollow shaft according to claim 1 , wherein both ends of the hollow shaft sleeve are provided with air ports. 4 . 4. A material dryer comprising the spiral hollow shaft according to any one of claims 1 to 3, characterized in that it comprises a dryer body and end covers arranged on both sides of the dryer, and a dryer body and end covers arranged on both sides of the dryer The power mechanism outside the machine body, the spiral hollow shaft is arranged inside the dryer body, and is driven by the power mechanism to realize rotation. 5. A material dryer according to claim 4, characterized in that, the dryer body is provided with a feed port, a discharge port, an exhaust gas outlet and an air supply port, and the feed port and the supply port are provided with The air ports are respectively arranged at both ends of the upper part of the dryer body, the exhaust gas outlet is opened at the upper part of the dryer body and close to the side of the feed port, and the discharge port is opened at a distance away from the feed port. The lower part or side part of the dryer body. 6 . The material dryer according to claim 5 , wherein both ends of the spiral hollow shaft protrude from the end cover, and the spiral hollow shaft on the side of the feed port is close to the feed port. 7 . The air port is the hot air air inlet, and the air port of the spiral hollow shaft close to the side of the material outlet is the hot air air outlet. 7. A material dryer according to claim 5, characterized in that, the side part of the dryer body is also provided with an interlayer hot air inlet and an interlayer hot air outlet, and the interlayer hot air inlet is It is set on the side of the feed port, and the hot air outlet of the interlayer is set on the side of the discharge port. 8 . The material dryer according to claim 5 , wherein the lower part of the dryer body is further provided with a drain port. 9 . 9 . The material dryer according to claim 5 , wherein a transparent observation window is arranged on the upper side of the dryer body along its axial direction. 10 . 10 . The material dryer according to claim 5 , wherein a support leg is provided below the dryer body. 11 .