Hot-air drying machine capable of utilizing waste heat and achieving penetrating countercurrent fluidization

A fluidized drying and tail heat technology, applied in dryers, drying gas layout, drying, etc., can solve problems such as personnel and equipment safety accidents, strong vibration, etc., achieve high drying quality, reduce equipment investment, and facilitate effect made

Active Publication Date: 2015-11-04
常州新舜干燥工程有限公司
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AI-Extracted Technical Summary

Problems solved by technology

Once part of the hardened dust is shaken off, it will immediately leave the dynamic rotation balance of the induc...
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Method used

Casing air inlet 42 can be connected air duct as required, and air inlet cover plate 46 is detachable, is fixedly connected casing 45 by bolt, and the volute shape involute profile of casing 45 satisfies fan casing airtight, transports gas At the same time, the need for efficient energy conversion is realized, so that the output airflow can reach the required flow rate and full pressure.
The upper and lower stretching of the hydraulic expansion device 13 and the start and stop of the vibration source 15 can make the material repeatedly concentrate, diffuse, and fall on the screen hole cone cover 20 and the screen hole cone plate 18...
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Abstract

The invention discloses a hot-air drying machine capable of utilizing waste heat and achieving penetrating countercurrent fluidization. The upper portion of a drying tower is connected with an induced draft fan, and the induced draft fan is connected with a cyclone dust removing waste heat efficient recoverer formed by a tube-type heat exchanger and a cyclone dust collector in an overlapped manner in the tangent direction and then is emptied; the air inlet end of the shell side of the tube-type heat exchanger is communicated with the atmosphere, and the air outlet end of the shell side of the tube-type heat exchanger is connected with the lower portion of the drying tower through an air blower and a steam finned heater; and an impeller of the induced draft fan is of a structure that blades are in a hollow and wedged shape, and the contour line of the appearance of the induced draft fan is an involute. According to the hot-air drying machine capable of utilizing the waste heat and achieving the penetrating countercurrent fluidization, creative integration is conducted on waste heat utilization and dust removal, the cyclone dust removing waste heat efficient recoverer is designed out, the equipment input is reduced, and the work efficiency is improved; and due to the fact that sieve mesh cone covers, sieve mesh cone discs, discharging tubes, a stretching vibration transmission shaft and conical plugs are arranged, penetrating, countercurrent, boiling and fluidization drying of materials are exquisitely and perfectly achieved, more energy is saved, the drying quality is higher, the power consumption of the induced draft fan is lower, and the application prospect is wider.

Application Domain

Drying gas arrangements

Technology Topic

ImpellerWhirlwind +16

Image

  • Hot-air drying machine capable of utilizing waste heat and achieving penetrating countercurrent fluidization
  • Hot-air drying machine capable of utilizing waste heat and achieving penetrating countercurrent fluidization
  • Hot-air drying machine capable of utilizing waste heat and achieving penetrating countercurrent fluidization

Examples

  • Experimental program(1)

Example Embodiment

[0031] The present invention will be further described in detail with reference to the accompanying drawings.
[0032] Such as figure 1 , figure 2 , image 3 with Figure 4 The shown tail heat uses hot-air penetrating countercurrent fluidized dryer, including a drying tower 21 and an induced draft fan A. The upper part of the drying tower A is equipped with a material sealing screw feeder 14, and the bottom is equipped with a closed air discharger 23; drying tower The upper part is connected to the induced draft fan A, and the induced draft fan A is tangentially connected to the high-efficiency cyclone dust removal tail heat recovery device formed by the superposition of the tubular heat exchanger 4 and the cyclone dust collector 1 and is emptied; the tubular heat exchanger 4 shell-side inlet The air end is connected to the atmosphere, and the outlet end is connected to the lower part of the drying tower 21 via the blower 12 and the steam fin heater 10; the induced draft fan A includes a fan impeller 41 and a casing 45. The fan impeller 41 includes an impeller back plate 37, an impeller panel 38 and The blades 31 are arranged in a hollow wedge shape with radial and center symmetry of the impeller shaft; the hollow wedge-shaped blades 31 are connected to the impeller panel 38 and welded with the impeller back plate 37 to form the impeller body; the impeller panel 38 is provided with an air inlet 33 and an impeller back plate 37 The shaft base 34 is fixed and connected by rivets 35. The shaft base 34 is connected to the fan shaft through the shaft hole 36; the casing 45 is provided with an air inlet 42 and an air outlet 47. The outline of the casing is involute and involute The center of the circle coincides with the fan axis. The involute line starts from the inside of the air outlet 47 of the casing, and the scribe radius gradually increases with the involute circle, and ends at the outside of the air outlet 47 of the casing. The width of the air outlet of the casing B is equal to the involute opening The circumference of the line circle 43; the air inlet 42 of the casing is provided with a cover plate 46, and the air inlet on the cover plate is also convenient for connecting the pipes, and the shaft center and the impeller shaft center coincide.
[0033] The top of the drying tower 21 is provided with a hydraulic expansion device 13 connected to the transmission shaft 22, the transmission shaft 22 penetrates the tower body and can be driven up and down by the hydraulic expansion device 13, and a vibration source 15 is provided on the transmission shaft 22 to transmit vibration; inside the drying tower body 21 It is provided with a plurality of layered repeating structures composed of a screen hole cone cover 20 and a screen hole cone disk 18, and there is a certain gap between the cone disk 18 and the cone cover 20 and both are fixed on the tower wall by elastic connection; the cone disk 18 and The cone cover 20 is respectively connected to the blanking tube 16 and the shaft sleeve 19, and there are a plurality of cone plugs 17 on the transmission shaft 22. The cone plugs 17 can close the blanking tube 16 upward, and can open the blanking tube by pressing the shaft sleeve 19 downward. 16.
[0034] The steam trap 8 of the steam fin heater 10 is tangentially connected to the cyclone dust collector 1, and the cyclone dust collector 1 is sprayed with steam condensate at a higher temperature, so as to realize the effective utilization of waste heat and wastewater.
[0035] The casing 45 is fixed on the base 44. The casing 45 plays a sealing role. The air inlet 42 receives kinetic energy through the rotation of the impeller 41, and converts energy in the casing 45. Part of the kinetic energy is converted into the static pressure energy of the gas, so that the output airflow has a speed dynamic pressure head There is a static head, and the sum of the two is the total pressure of the fan.
[0036] The air inlet 42 of the casing can be connected with air ducts as required, the cover 46 of the air inlet is detachable, and the casing 45 is fixed by bolts. The volute-shaped involute profile of the casing 45 meets the requirements of airtightness of the fan casing and energy delivery at the same time. The need for efficient conversion enables the output airflow to reach the required flow rate and full pressure.
[0037] The casing air inlet cover 46 is fixedly connected to the casing 15 by bolts, and is detachable.
[0038] When the equipment is working, the material to be dried enters the cone 18 on the upper part of the drying tower 21 from the material seal screw feeder 14. At this time, the hydraulic retractor 13 drives the drive shaft 22 to press the cone plug 17 upward to close the blanking tube 16 . After the vibration source 15 is activated, the material in the cone plate 18 will be concentrated to the middle blanking pipe 16 due to vibration, and the cone cover 20 will not be affected at this time.
[0039] When the hydraulic retractor 13 drives the drive shaft 22 downward, the tapered plug 17 will press down on the shaft sleeve 19 and open the blanking tube 16. At this time, the material will fall on the lower cone cover 20 through the blanking tube 16. When the vibration source 15 is restarted, the material on the cone cover 20 will move to the edge due to the vibration, and enter the lower cone disk 18 through the gap between the cone cover and the cone disk. At this time, the cone disk 18 is not affected.
[0040] The up and down expansion of the hydraulic retractor 13 and the start and stop of the vibration source 15 can make the material repeatedly concentrate, diffuse, and fall on the screen cone cover 20 and the screen cone disk 18, so that the material can gradually move downward in fluidization. , And the bottom-up hot air to achieve hot-air penetrating countercurrent fluidized drying, so that the drying efficiency is extremely high, and the energy consumption is extremely low. The dried material is output through the closed air discharge machine 23 at the bottom of the tower.
[0041] The induced draft fan A inputs the hot and humid exhaust gas from the upper part of the tower body 21 into the cavity between the tubular heat exchanger 4 and the cyclone dust collector 1, to achieve cyclone dust removal and perform the first step of rotating the fresh air entering the shell side of the heat exchanger 4 Flow heating, dust is output by the closed winder 7.
[0042] The wet hot water vapor after dust removal enters the tube pass of the heat exchanger 4 through the swirling riser pipe 6, and is finally discharged from the exhaust pipe 3. The wet hot water vapor in the tube pass heats the fresh air entering the shell side in the second step and preheats in two steps. After the fresh air is fed into the steam fin heater 10 by the blower 12 and heated to the required temperature, it enters the lower part of the drying tower 21, and the material falling gradually in fluidized state realizes hot air penetrating countercurrent fluidized drying.
[0043] When the induced draft fan impeller of the present invention is used, because the blades are designed as a hollow wedge shape, and the blade axis is symmetrical in the radial direction, when rotating at a high speed, the blade surface has a centrifugal self-cleaning effect under the action of centrifugal force, so that dust cannot be attached due to centrifugal force. It will not affect the dynamic and static balance of the impeller, and will not accumulate dust; this technical solution of the blade structure is especially suitable for the use of wide-impeller induced draft fans with large air flow.
[0044] The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Anyone familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes. example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

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