阅读说明：本技术 一种应用干燥介质的循环流化床干燥器 (Circulating fluidized bed dryer using drying medium ) 是由 赵红轮 赵国英 缪琦 邱怡 于 2020-07-23 设计创作，主要内容包括：本发明公开了一种应用干燥介质的循环流化床干燥器,包括干燥器本体,所述干燥器本体底部设置有干燥介质料斗,所述干燥介质料斗内放置干燥介质,干燥介质料斗底部连接流化风管,所述干燥器本体内顶部还设置有物料入管。本发明通过在流化床内加入固态干燥介质,使用流化风使介质处于流化状态,这种因添加了干燥介质而增加的储能作用,节约了热量成本；需干燥的液态物质以喷淋的方式介入流化运动内部,一方面液态物料在自我流化的过程中可以进行干燥分离,同时液态物料在与介质表面接触的同时,因其表面传热系数更大,接触面积更大,液态物料更容易从中吸取到热量,从而大大加快的干燥的过程。(The invention discloses a circulating fluidized bed dryer applying a drying medium, which comprises a dryer body, wherein a drying medium hopper is arranged at the bottom of the dryer body, the drying medium is placed in the drying medium hopper, the bottom of the drying medium hopper is connected with a fluidized air pipe, and a material inlet pipe is further arranged at the top in the dryer body. According to the invention, the solid drying medium is added into the fluidized bed, and the fluidized air is used for keeping the medium in a fluidized state, so that the energy storage effect is increased due to the addition of the drying medium, and the heat cost is saved; inside the liquid material that needs drying intervenes fluidization with the mode that sprays, on the one hand liquid material can dry the separation at the in-process of self-fluidization, and liquid material is simultaneously when with the contact of medium surface, because of its surface heat transfer coefficient is bigger, area of contact is bigger, and liquid material is easier from absorbing the heat to the dry process of greatly accelerated.)

1. A circulating fluidized bed dryer using a drying medium, comprising a dryer body (1), characterized in that: the dryer is characterized in that a drying medium hopper (6) is arranged at the bottom of the dryer body (1), the drying medium hopper (6) is in a hopper shape, drying media are placed in the drying medium hopper, a fluidized air pipe (8) is connected to the bottom of the drying medium hopper (6), the fluidized air pipe (8) is connected to external fluidized air generating equipment, a material inlet pipe (5) is further arranged at the top of the dryer body (1), and the material inlet pipe (5) extends to a position right above the drying medium hopper (6) and is provided with a plurality of nozzles (51) which are vertically downward in direction.

2. The circulating fluidized bed dryer using drying medium according to claim 1, wherein: the bottom of the drying medium hopper (6) is provided with a sleeve (71) outside the fluidized air pipe (8), the sleeve (71) is connected with a material outlet pipe (7), and filter cloth (62) is arranged between the top end of the sleeve (71) and the fluidized air pipe (8).

3. The circulating fluidized bed dryer using drying medium according to claim 1, wherein: a medium adding port (61) is formed in one side of the dryer body (1) and located at the position of the drying medium hopper (6).

4. A circulating fluidized bed dryer using drying medium according to claim 1, 2 or 3, characterized in that: the drying medium is quartz sand particles.

5. The circulating fluidized bed dryer using drying medium according to claim 1, wherein: arc-shaped guide plates (2) are arranged on two sides of the nozzle (51) in the dryer body (1), and gaps are reserved between the arc-shaped guide plates (2) on the two sides.

6. The circulating fluidized bed dryer using drying medium according to claim 5, wherein: the contact position of the root of the arc-shaped guide plate (2) and the inner wall of the dryer body (1) is provided with a through hole (21).

7. The circulating fluidized bed dryer using drying medium according to claim 1, wherein: the dryer is characterized in that a steam discharge pipe (3) is connected to the top of the dryer body (1), the steam discharge pipe (3) is connected to the heat exchanger (4), and the material inlet pipe (5) penetrates through the heat exchanger (4).

8. The circulating fluidized bed dryer using drying medium according to claim 1, wherein: the end part of the fluidization air pipe (8) is provided with a slide bar (82), and a slidable sealing cover (81) is arranged on the slide bar (82).

9. The circulating fluidized bed dryer using drying medium according to claim 8, wherein: the sealing cover (81) and the fluidization air pipe (8) are assembled in a clearance mode, and the bottom of the sealing cover (81) is in a cone shape.

Technical Field

The invention relates to the technical field related to fluidized drying, in particular to a circulating fluidized bed dryer applying a drying medium.

Background

Fluidization techniques began as early as 1921. The fluidized drying is a process of drying materials by carrying out convection and radiation heat exchange through fluidized air in the process of boiling and fluidizing the materials in a fluidized bed so as to evaporate and take away redundant moisture. Since the invention of the fluidized technology, drying was one of the earliest fields of application.

Fluidized drying has several advantages: (1) the fluidized material is continuously stirred violently in the bed, so the heat transfer effect is good; (2) the fluidized bed can dry materials, so that the materials are not deteriorated due to overhigh local problems; (3) the start-stop operation is convenient (4) the fluidization rate and the differentiated discharging time can be adjusted; (5) fluidization itself has no mechanical movement means other than abrasion, which can reduce maintenance costs.

When current fluidized dryer is at dry liquid material, heat liquid material through the desicator to assist with the stirring, make the material heat through the mode of slow heat transfer, come out the moisture evaporation that contains in it, this drying method processing time is longer, and along with material moisture evaporation concentration rising, stirring efficiency also can reduce gradually, has the homogeneity problem.

Disclosure of Invention

The object of the present invention is to provide a circulating fluidized bed dryer using a drying medium to solve the problems set forth in the background art described above.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides an use circulation fluidized bed dryer of drying medium, includes the desicator body, desicator body bottom is provided with the drying medium hopper, the drying medium hopper is the bucket form, places drying medium in it, and the fluidization tuber pipe is connected to drying medium hopper bottom, the fluidization tuber pipe is connected to outside fluidization wind and generates equipment, this internal top of desicator still is provided with the material and goes into the pipe, the material goes into the pipe and extends to being located directly over the drying medium hopper to set up the vertical decurrent a plurality of nozzles of direction.

As a further scheme of the invention: the bottom of the drying medium hopper is positioned outside the fluidized air pipe and is provided with a sleeve, the sleeve is connected with a material outlet pipe, and filter cloth is arranged between the top end of the sleeve and the fluidized air pipe.

As a further scheme of the invention: and a medium adding port is arranged at one side of the dryer body and positioned at the position of the drying medium hopper.

As a further scheme of the invention: the drying medium is quartz sand particles.

As a further scheme of the invention: arc guide plates are arranged on two sides of the nozzle in the dryer body, and a gap is reserved between the arc guide plates on the two sides.

As a further scheme of the invention: the contact position of the root of the arc-shaped guide plate and the inner wall of the dryer body is provided with a through hole.

As a further scheme of the invention: the dryer comprises a dryer body and is characterized in that a steam discharge pipe is connected to the top of the dryer body and connected to a heat exchanger, and a material inlet pipe penetrates through the heat exchanger.

As a further scheme of the invention: the end part of the fluidized air pipe is provided with a slide bar, and a slidable sealing cover is arranged on the slide bar.

As a further scheme of the invention: the seal cover and the fluidization air pipe are assembled in a clearance mode, and the bottom of the seal cover is in a cone shape.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the solid drying medium is added into the fluidized bed, and the fluidized air is used to enable the medium to be in a fluidized state, so that heat energy in the fluidized air can be stored in the medium in the fluidizing process of the medium, and the energy storage effect increased by adding the drying medium saves the heat cost, reduces the influence of the concentration of the input material on the fluidizing air speed, and is more stable in operation; the quartz sand is fluidized in a fluidized bed, and a liquid substance needing drying is introduced into the fluidized movement in a spraying mode, on one hand, the liquid material can be dried and separated in the self-fluidizing process, meanwhile, the liquid material is in surface contact with a medium, and meanwhile, the liquid material is larger in surface heat transfer coefficient and larger in contact area, and the liquid material can absorb heat more easily, so that the process not only keeps the original contact and radiation heat exchange mode, but also increases the contact heat exchange mode, and the drying process is greatly accelerated.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic front view of a drying medium hopper according to the present invention.

Fig. 3 is a schematic top view of a drying medium hopper according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, in an embodiment of the present invention, a circulating fluidized bed dryer using a drying medium includes a dryer body 1, a drying medium hopper 6 is disposed at a bottom of the dryer body 1, the drying medium hopper 6 is in a bucket shape, the drying medium, such as quartz sand particles, is placed in the drying medium hopper 6, the bottom of the drying medium hopper 6 is connected to a fluidized air pipe 8, the fluidized air pipe 8 is connected to an external fluidized air generating device to blow high-temperature fluidized air to the bottom of the drying medium hopper 6, a material inlet pipe 5 is further disposed at a top of the dryer body 1, the material inlet pipe 5 extends to a position right above the drying medium hopper 6 and is provided with a plurality of nozzles 51 facing longitudinally downward, a liquid material is fed into the dryer through the material inlet pipe 5 and is ejected through the nozzles 51, the fluidized air is blown out from the bottom of the drying medium hopper 6 before the liquid material is fed, blow up the quartz sand in the hopper and blow off, the quartz sand is in the fluidization state, and the bed height of dry medium is stabilized to the size through adjusting the wind pressure, the quartz sand carries out the heat exchange with fluidization wind at this in-process, carry out abundant energy storage, spray the release afterwards and need dry liquid material, the material intervenes in the fluidization circulation, except that the tradition and the radiation convection heat transfer of air contact, in the contact with the quartz sand, because of having taken place new contact heat transfer mode, medium surface heat transfer coefficient is high, the area is big, make with material area of contact greatly increased, the material absorbs evaporation rate and promotes greatly, drying speed has been accelerated.

The arc-shaped guide plates 2 are arranged on two sides of the nozzle 51 in the dryer body 1, gaps are reserved between the arc-shaped guide plates 2 on the two sides, on one hand, the material inlet pipe 5 passes through the gaps, on the other hand, water vapor evaporated from the material moves upwards and is discharged, the arc-shaped guide plates 2 play a role in guiding the flow, and the material and the medium form circular flow in the fluidization process of the material and the medium, so that the contact reaction time of the material and the medium is prolonged, and the drying efficiency is ensured; the contact position of the root of the arc-shaped guide plate 2 and the inner wall of the dryer body 1 is provided with the through hole 21, and the material cannot exceed the upper part of the guide plate under the control of the fluidizing wind pressure, but partial overflow possibly exists, so that partial material can flow back from the guide plate after the fluidizing is stopped, and flows back to the lower part from the through hole 21, and the material loss is reduced.

The dryer comprises a dryer body 1 and is characterized in that a steam discharge pipe 3 is connected to the top of the dryer body 1, the steam discharge pipe 3 is connected to a heat exchanger 4, a material inlet pipe 5 penetrates through the heat exchanger 4, the steam discharge pipe 3 exchanges heat with the heat exchanger 4, the material inlet pipe 5 preheats the material through the heat exchanger 4 when passing through the heat exchanger 4, the material inlet temperature is improved, heat of hot steam is recycled, and the material drying time is shortened.

As shown in fig. 2 and 3, a sleeve 71 is arranged at the bottom of the drying medium hopper 6 and outside the fluidization pipe 8, the sleeve 71 is connected with the material outlet pipe 7, a filter cloth 62 is arranged between the top end of the sleeve 71 and the fluidization air pipe 8, the material and the medium flow back into the drying medium hopper 6 after the fluidization drying, the quartz sand medium is isolated by the filter cloth 62, and the material flows through the filter cloth 62 and then enters the material outlet pipe 7 through the sleeve 71 to be discharged. A medium adding port 61 is arranged at the position of the drying medium hopper 6 at one side of the dryer body 1 for supplementing quartz sand medium into the hopper.

8 tip of fluidization tuber pipe is provided with draw runner 82, set up slidable closing cap 81 on the draw runner 82, closing cap 81 adopts clearance fit with fluidization tuber pipe 8, and closing cap 81 bottom is the cone form, and closing cap 81 lies in fluidization tuber pipe 8 inside under the windless state and plays the shutoff effect to the pipeline to prevent that medium material from leaking into intraductally, and utilize the wind pressure to jack-up closing cap 81 to outside of the tubes after the ventilation, the bottom cone plays the effect of wind direction equipartition.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.