CN115572036A - Discharge structure for disc dryer and disc dryer comprising same - Google Patents

Abstract

The invention provides a discharge structure for a disc dryer and a disc dryer comprising the same, wherein the discharge structure comprises: a hollow shaft passing through the disc structure of the disc dryer and having a plurality of openings formed therein, the openings being in fluid communication with the cavity of the disc structure; a central tube disposed inside the hollow shaft through the hollow shaft in an axial direction of the hollow shaft, and one end of the central tube is closed; a branch pipe, one end of which is in fluid communication with the cavity of the disc structure, the other end of which is in fluid communication with the central pipe, and the depth of the branch pipe inserted into the central pipe is at least greater than the radius of the central pipe; and a water outlet pipe, the first end of which enters the other end of the central pipe and is in fluid communication with the other end of the central pipe, and the second end of which is in communication with the outside. According to the present invention, noncondensable gas such as air accumulated in the disk can be discharged, accumulated water in the center tube can be discharged, and the heat of steam in the disk structure can be ensured, thereby better protecting the center tube.

Description

Discharge structure for disc dryer and disc dryer comprising same

Technical Field

The present invention relates to the field of disc dryer industry using steam as a heat source, and more particularly, to a drain structure for a disc dryer and a disc dryer including the same.

Background

The disc dryer is applied to the field of drying of materials such as sludge, food, medicines and chemical raw materials, a drying heat source of the disc dryer is generally heat conduction oil or saturated steam, the structure of the disc dryer is shown in figure 1, and the disc dryer comprises a steam manifold 1, a driving system 2, a junction box, a threading pipe 3, a drainage manifold 4, an equipment base 5, an equipment main body 6, an equipment heat preservation 7 and a carrier gas heat exchanger.

The working principle of the disc dryer is as follows:

wet sludge enters the equipment main body 6 from the feeding hole (1), the driving system 2 transmits power to the hollow rotor (3) through the speed reducing motor and chain transmission, the hollow rotor (3) rotates and pushes the sludge to the tail part of the equipment main body 6 step by step, and dry sludge is discharged from the discharging hole (5).

Steam enters the hollow rotor (3) through the rotary joints at the two ends of the hollow rotor (3) through the steam manifold 1, and the heating of the material is completed through the large heat exchange area of the disk shaft and the auxiliary disks, so that the moisture of the wet material is quickly evaporated. The condensed water after the steam heat exchange is discharged out of the equipment main body 6 through the rotary joint.

The carrier gas is heated by the carrier gas heat exchanger 8 and enters the equipment main body 6 through the carrier gas port (4), and the carrier gas brings the water vapor evaporated by the wet sludge out of the equipment main body 6 through the gas outlet (2).

The core element ensuring proper operation of the disc dryer is a hollow rotor with discs inside the casing, as shown in fig. 2, which fig. 2 shows a hollow shaft structure, which as shown comprises a rotary joint 21, a siphon 22, a hollow shaft 23 and a plurality of disc structures 24.

As shown in fig. 3A and 3B, the disc structure of the disc dryer is two disc steel plates with identical shapes and slightly different sizes, i.e., a large disc 31 and a small disc 32 are butt-welded together. The large disc 31 and the small disc 32 are annular, the middle of the large disc is provided with a hole, the small disc is pressed into a disc shape, the middle of the small disc is buckled to form a cavity, and then the hollow shaft 23 is sleeved with the large disc and the small disc, the hollow shaft 23 is provided with a hole, and steam can enter the cavity of the large disc and the small disc through the hole on the hollow shaft 23.

Only one side of the long water baffle 33 can be welded with one of the large and small disks, the other side can not be welded, and the small water baffle 34 can be welded with both sides and the large and small disks because of being shorter.

A cavity is formed between the large disc 31 and the small disc 32, when in operation, steam can enter the disc structure 24 from the hollow shaft 23 through the drainage branch pipe 35, the inside of the disc structure 24 can be filled with the steam, the steam is condensed into liquid after heat exchange, the disc structure 24 rotates continuously, water in the disc structure 24 is collected into a water collecting tank formed by the long water baffle 33 and the short water baffle 34 through the water baffles 33 and 34 welded in the disc cavity, then the water flows into the hollow shaft 23 through the drainage branch pipe 35 under the action of gravity, and the water in the hollow shaft 23 is sucked away at the end part of the hollow shaft 23 through the siphoning action of the siphon pipe 22.

Referring again to fig. 2, the steam enters the hollow shaft 23 and then enters the inside of the disc, and is transferred to the sludge outside the disc by the heat released in the process of condensing into condensed water, and if the condensed water and the non-condensed gas in the disc and the central shaft 23 cannot be discharged in time, the heat transfer of the disc is inevitably influenced, so that the drying effect and the treatment capacity of the equipment are influenced.

The drainage of the conventional disc dryer in the market generally adopts the arrangement of a water baffle in a disc, and during the rotation of the disc, the water baffle guides and collects condensed water in the disc into a hollow shaft, and then the condensed water is discharged out of the hollow shaft by arranging a siphon.

However, the problems that are liable to occur with the siphon discharge and the conventional discharge structure in the disk are as follows:

the process that the steam in the disc is condensed into liquid after heat exchange, and the liquid condensate water is discharged out of the disc is shown in fig. 4, and in the process of disc rotation, the long water baffle brings the condensate water from a low point to a high point and then flows into the central shaft 23 through the water discharge branch pipe 35. Because the cavity formed between the large disc 31 and the small disc 32 is narrow relative to the diameter of the discs, and belongs to a narrow and long space, due to space limitation, the long water baffle 33 in the cavity can only be completely welded with one of the large disc and the small disc before the two discs are buckled together, and after the two discs are buckled together, the welding gun cannot enter the cavity, so the welding gun is not normally welded. During the rotation and drainage process of the disk, water is easy to leak from the gap between the long water baffle 33 and the disk, thus causing water storage in the disk, affecting the heat transfer effect, and causing the problems of low equipment processing capacity, large energy consumption and the like.

When the device starts to operate, when steam is introduced into the disc from the outside, the steam can simultaneously enter the disc from the four drain branch pipes 35 of the hollow shaft, so that air entering from the hollow shaft is accumulated in the disc, the air has great heat insulation performance, the heat transfer of the device is influenced, and the non-condensable gas in the disc can be gradually replaced only through diffusion. This causes a problem that the heat exchange effect of the equipment is poor for a long time in the initial stage of operation, and thus the equipment has low treatment capacity, high energy consumption and the like.

Disclosure of Invention

In order to solve the above problems, the present invention provides a discharge structure for a disc dryer, which can discharge noncondensable gas such as air accumulated in a disc, and discharge accumulated water in a center tube by providing a discharge structure with blades, thereby ensuring heat of steam in the disc structure and better protecting the center tube.

In order to accomplish the above object, there is provided a drain structure for a disc dryer, the drain structure comprising: a hollow shaft passing through a disc structure of the disc dryer, the hollow shaft having a plurality of openings disposed therein and in fluid communication with a cavity of the disc structure; a center pipe disposed inside the hollow shaft through the hollow shaft in an axial direction of the hollow shaft, and one end of the center pipe is closed; a manifold having one end in fluid communication with the cavity of the disc structure and another end in fluid communication with the center tube, the manifold being inserted into the center tube to a depth at least greater than the radius of the center tube; and a first end of the water outlet pipe enters the other end of the central pipe and is in fluid communication with the other end of the central pipe, and a second end of the water outlet pipe is communicated with the outside.

Further, the disc structure comprises water retaining grooves, and the branch pipes are in one-to-one correspondence with and in fluid communication with the water retaining grooves.

Further, a drainage blade is arranged in the central tube and extends along the circumference of the central tube in a manner of being tightly attached to the inner wall of the central tube, the inside of the drainage blade is hollow, the first end of the drainage blade is communicated with the water outlet pipe in a fluid mode, and the second end of the drainage blade is provided with an opening.

Further, one of the drainage vanes is provided in the central tube, and the opening of the drainage vane extends beyond a line connecting a connection point of the drainage vane and the water outlet pipe located downstream and a highest point of the water outlet pipe located between the connection point of the drainage vane and the water outlet pipe.

Further, a plurality of the drainage vanes are arranged in the central tube, and the openings of the drainage vanes extend beyond the connecting line of the downstream connecting points of the drainage vanes and the water outlet tube and the central point of the central tube.

Further, two drainage vanes are arranged in the central pipe, and one ends of the two drainage vanes are arranged along the periphery of the central pipe at an interval of 180 degrees.

Further, the first end of the water outlet pipe is provided with a blocking cover used for sealing the water outlet pipe.

Further, the blocking cover is fixed on the water outlet pipe in a welded mode.

Further, the discharge structure still including set up the center tube with the reducer union between the outlet pipe be provided with a plurality of helical blade in the reducer union.

Further, the helical blades are arranged at equal intervals along the circumference of the inner wall of the reducer union.

Further, the helical blade has a helical shape.

Further, the side of helical blade sets up on the inner wall of reducer union, through helical blade carries out the in-process of drainage, helical blade be close to the central axis's of reducer union first point is higher than helical blade with the second point that the main aspects of reducer union are connected, and, the second point be higher than helical blade with the third point that the tip of reducer union is connected.

According to another aspect of the present invention, the disc dryer includes the above-described drain structure.

The utility model provides a discharge structure can discharge noncondensable gases such as the air in the disc structure, can discharge the ponding in the disc structure moreover, has not only guaranteed the heat of steam in the disc structure, protection center tube that moreover can be better.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic construction of a prior art disc dryer;

fig. 2 shows a schematic view of a hollow shaft structure of a disc dryer of the prior art;

fig. 3A and 3B are schematic views illustrating a conventional disc drainage structure of a related art disc dryer, in which fig. 3A illustrates a side view of a large disc and a small disc combined with each other; FIG. 3B showsbase:Sub>A cross-sectional view taken along line A-A in FIG. 3A;

FIG. 4 shows a schematic process diagram of disc draining of a disc dryer;

fig. 5A and 5B are schematic diagrams illustrating a disc structure of a disc dryer according to a first embodiment of the present application, wherein fig. 5A illustrates a side view of a large disc and a small disc combined with each other; FIG. 5B illustrates a twisted view of the elongated splash plate and an enlarged view of a portion of the twisted elongated splash plate;

FIG. 6 showsbase:Sub>A schematic cross-sectional view ofbase:Sub>A long water deflector inbase:Sub>A disc configuration ofbase:Sub>A disc dryer taken along line A-A shown in FIG. 5B and an enlarged schematic view thereof;

FIG. 7 illustrates a perspective view of a elongated splash plate according to an embodiment of the present application;

FIGS. 8A and 8B are schematic views and enlarged views, respectively, of the elongated splash plate of FIG. 5B torsionally offset with respect to its axis;

FIG. 9 shows a schematic configuration of a elongated splash plate according to a second embodiment of the present application;

FIG. 10A illustratesbase:Sub>A front view of the gib structure shown in FIG. 9, and FIG. 10B illustratesbase:Sub>A cross-sectional view of the gib taken along line A-A in FIG. 10A;

FIG. 11 illustrates a view of the elongated splash plate of FIG. 9 positioned on a disc structure;

FIG. 12 illustrates a sectional view of a disk structure taken along line B-B in FIG. 11 and an enlarged view thereof

Fig. 13 shows a schematic view of a discharge structure for a disc dryer according to a third embodiment of the present application;

FIG. 14 illustrates an internal cross-sectional view of the drain structure of the disc dryer shown in FIG. 13;

FIG. 15 shows a schematic view of the water accumulation prone portion of the disc dryer shown in FIG. 13;

fig. 16 is a perspective view showing a discharge structure for a disc dryer according to a fourth embodiment of the present application;

FIG. 17A shows a cross-sectional view of the drain structure shown in FIG. 16, and FIG. 17B shows a relationship between components in the drain structure shown in FIG. 16;

FIG. 18 is a view schematically showing a drainage process of the drain structure shown in FIG. 16;

fig. 19A is a schematic cross-sectional view illustrating a drain structure for a disc dryer according to a fifth embodiment of the present application, and fig. 19B is a graph illustrating a relationship between parts in the drain structure illustrated in fig. 19A;

FIG. 20 is a view schematically showing a drainage process of the drain structure shown in FIG. 19A;

fig. 21 is a perspective view schematically showing a drain structure for a disc dryer according to a sixth embodiment of the present application;

FIGS. 22 and 23 schematically illustrate side and front views, respectively, of the drain structure shown in FIG. 21;

fig. 24 is a diagram schematically showing the relationship between the respective members in the drain structure shown in fig. 21.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

According to the present application, there is provided a disc structure of a disc dryer, the disc structure including: the middle part of the large disc is provided with a first opening; the middle part of the small disc is provided with a second opening; the long water baffle is arranged on the small disc and extends from the outermost end of the small disc to the second opening of the small disc, and the plane where the long water baffle is located deflects relative to the plane which passes through the connection position of the long water baffle and the small disc and is perpendicular to the small disc; and a short water baffle shorter than the long water baffle, the short water baffle being disposed on at least one of the large disk and the small disk, and the short water baffle and the long water baffle forming a water baffle groove when the large disk and the small disk are combined.

Fig. 5A and 5B show schematic disc structures of a disc dryer according to a first embodiment of the present application.

As shown in fig. 5A and 5B, the disc structure of the disc dryer includes a large disc 10 and a small disc 20, wherein a first opening (not shown) is provided in the middle of the large disc 10, and a second opening 50 is provided in the middle of the small disc 20. When the large disc 10 and the small disc 20 are coupled to each other, a narrow cavity is formed therebetween.

And, the disc structure further includes a long water guard 30 provided on the large disc 10 or the small disc 20 and a short water guard 40 provided on at least one of the large disc 10 and the small disc 20.

According to a preferred embodiment of the present application, as shown in FIG. 7, the body 31 of the elongated splash plate 30 has a generally triangular shape.

According to a preferred embodiment of the present application, elongated breakwater 30 is provided on small disc 20, and one side 32 of main body 31 of elongated breakwater 30 is fixed to small disc 20 by welding, for example. Of course, the elongated water guard 30 may be provided on the large disk 10.

Also, as shown in fig. 5B, the long water guard 30 extends from the outermost end of the small disk 20 to the second opening 50 of the small disk 20.

The enlarged detail view in fig. 5B shows the deflection of the plane in which the body of the elongated breakwater 30 lies relative to the plane perpendicular to the small disc passing through the junction of the elongated breakwater with the small disc. Specifically, in the present application, one side surface 32 of the main body 31 of the elongated water guard 30 is disposed on the small disc 20, and the elongated water guard 30 is deflected at a certain angle with respect to a plane (hereinafter, referred to as a vertical plane) in which it is vertically disposed on the small disc 20.

Preferably, the elongated splash guard 30 is offset from the vertical plane by 5 to 10 degrees, in other words, the elongated splash guard 30 is torsionally offset from its central axis, as shown in FIGS. 8A and 8B. As shown, reference numeral 30 'shows the long water guard when vertically disposed on the small disc 20, and reference numeral 30 shows the long water guard deflected by 5 to 10 degrees with respect to the long water guard 30', i.e., the long water guard 30 is deflected by 5 to 10 degrees with respect to its axis.

As shown in fig. 5B, the disc structure further includes a short splash 40, the short splash 40 is shorter than the long splash 30, and the short splash 40 is provided on at least one of the large disc 10 and the small disc 20. According to an embodiment of the present application, both side surfaces of the short water guard plate 40 are welded and fixed to the large disc 10 and the small disc 20. And, the short and long breakwaters 40 and 30 form a water dam groove when the large and small disks 10 and 20 are combined.

And, the short splash 40 is disposed downstream of the long splash 30 in the rotation direction of the small disc 20 where the long splash 30 is located.

As shown in fig. 5B, the disk structure is provided with two long water guards 30 which are oppositely disposed across the second opening hole 50 of the small disk.

According to a preferred embodiment of the present application, the disc structure may further be provided with a plurality of long water baffles 30, the plurality of long water baffles 30 being spaced along the circumference of the small disc 200 on which they are located, for example, the plurality of water baffles 30 are spaced at a uniform angle, such as 120 degrees, from each other.

As shown in fig. 6, which shows a state where the long water guard 30 is welded to the small disc 20 without being welded to the large disc 10 when the long water guard 30 is welded to the small disc 20 and the large disc 10 is coupled to the small disc 20, wherein the dotted line is a state where the long water guard 30 is perpendicular to the small disc 20 and the solid line indicates a state where the long water guard 30 is deflected with respect to its own axis.

According to an embodiment of the present application, both side surfaces of the main body of the short water guard plate 40 are welded to the large disc 10 and the small disc 20, respectively.

According to another aspect of the present application, there is provided a disc dryer including the disc structure described above.

According to the present application, as described above, the long water guard 30 is completely welded to the small disc 20 in a deflected manner, but not welded to the large disc 10, when the small disc 20 rotates clockwise, water near the large disc 10 flows to the edge where the long water guard 30 is connected to the small disc 20 due to the torsional offset of the long water guard 30, and the connecting edge is a completely welded structure, so that water flows into the central shaft along the welding seam connected to the small disc 20, and thus the water can be effectively prevented from flowing away from the unwelded seam.

According to yet another aspect of the present application, there is provided a long water guard for a disc dryer disc structure, the long water guard including: a body including a first side coupled to the disc structure and a second side opposite the first side; and a bent portion provided at the second side surface and extending from the second side surface in an inclined manner with respect to the main body.

As shown in fig. 9 and 10A and 10B, the dash panel 300 according to the present application includes a main body 301 and a bent portion 303 extending from the main body 301 along a length direction of the main body 301 and inclined with respect to the main body 301. Also, the first side 305 of the body 301 of the elongated water deflector 300 is disposed on the disc structure, for example, fixed thereto by welding. The bent portion 303 extends from a second side surface opposite to the first side surface.

Preferably, the inclination angle at which the bent portion 303 is inclined with respect to the main body 301 is equal to or greater than 90 degrees, and more preferably, the inclination angle at which the bent portion 303 is inclined with respect to the main body 301 is between 90 degrees and 100 degrees.

According to an embodiment of the present application, the bent portion 303 is provided on the second side of the elongated water guard 300 along substantially the entire length of the body.

As shown in fig. 11, a first side of the long water guard 300 with the bent portion 303 is disposed (such as fixed by welding) on the small disc 200, and the short water guard 400 is disposed (such as fixed by welding) on the large disc 100 and the small disc 200.

As described above, the disk structure in this embodiment is the same as that described above based on the first embodiment. That is, the disc structure includes a large disc 100 and a small disc 200, wherein a first opening is provided in the middle of the large disc 100 and a second opening is provided in the middle of the small disc 200. When the large disc 100 and the small disc 200 are coupled to each other, a narrow cavity is formed therebetween.

When the large disk 100 and the small disk 200 with the long water guard 300 and the short water guard 400 are coupled together, as shown in fig. 12, since the bent portion 303 is inclined with respect to the main body 301, the bent portion 303 of the long water guard 300 and the large disk 100 can be closely attached based on elastic deformation between the bent portion 303 and the main body 301.

Therefore, in the process of rotating the disc structure, when the water stored in the disc is brought to the high position from the low position by the long water baffle, the water does not stay at the bent position due to the existence of the bend, the water enters a cavity formed by the main body 301 and the bent portion 305 of the long water baffle 300 and the three surfaces of the small disc 200, and the cavity formed between the long water baffle 300 and the small disc 200 enters the hollow shaft.

Moreover, since the inclination angle of the bending portion 303 relative to the main body 301 is greater than or equal to 90 degrees, the bending portion 303 generates a certain deformation by mutual buckling of the two disks, and the bending portion 303 is tightly attached to the large disk 100 by the elastic deformation force, thereby realizing self-attachment.

According to the present application, as described above, the long water guard 300 is completely welded to the small disc 200 without being welded to the large disc 100, and when the small disc 200 rotates clockwise, water near the large disc 100 enters the cavity formed by the main body 301 of the long water guard 300, the bent portion 305 and three surfaces of the small disc 200 due to the bent portion of the long water guard 300, and does not flow out from the unwelded weld, so that water can be effectively prevented from flowing away from the unwelded gap.

According to another preferred embodiment of the present application, the long water guard 300 with the bent portion 303 is disposed on the large or small disc in such a manner as to be deflected with respect to a plane passing through a junction of the long water guard and the disc where the long water guard is located and perpendicular to the disc where the long water guard is located.

Specifically, the elongated water guard 300 with the bent portion 303 is provided on the large disc or the small disc in an offset manner with respect to its own central axis, as described above based on fig. 5B to 8B.

Preferably, the plane of the main body 301 of the water bar 300 with the bent portion 303 is deflected by 5 to 10 degrees with respect to a plane passing through the junction of the water bar and the disk where the water bar is located and perpendicular to the disk where the water bar is located. Therefore, when the disk with the long water baffle 300 is buckled with another disk, the bent portion 303 generates a certain deformation, and the bent portion 303 is tightly attached to the other disk through the deformation elasticity, so that the self-attachment is realized.

As described above, this structure also effectively prevents water from flowing out of the unwelded gap.

According to the application, two long water baffles with bent parts can be arranged on the disk structure, and the two long water baffles are oppositely arranged by separating the open hole of the disk where the two long water baffles are arranged.

Of course, a plurality of long water baffles with bending parts can be arranged on the disk structure, and the long water baffles are arranged at intervals along the circumference of the disk where the long water baffles are arranged.

According to the above description, the structure of the long water baffle disc dryer disc including the bent part can effectively prevent water from flowing away from the unwelded gap.

According to yet another aspect of the present application, there is provided a drain structure for a disc dryer, the structure including a hollow shaft passing through a disc structure of the disc dryer, the hollow shaft having a plurality of openings disposed therein, and the openings being in fluid communication with a cavity of the disc structure; a central pipe disposed inside the hollow shaft through the hollow shaft in an axial direction of the hollow shaft, and one end of the central pipe is closed; one end of the branch pipe is in fluid communication with the cavity of the disc structure, the other end of the branch pipe is in fluid communication with the central pipe, and the depth of the branch pipe inserted into the central pipe is at least greater than the radius of the central pipe; and a first end of the water outlet pipe enters the other end of the central pipe and is in fluid communication with the other end of the central pipe, and a second end of the water outlet pipe is communicated with the outside.

The following will describe in detail the discharge structure according to the present application with reference to fig. 13 to 24.

Fig. 13 and 14 show a discharge structure according to a third embodiment of the present application. As shown, the discharge structure includes a branch pipe 2000, a hollow shaft 3000, a water outlet pipe 4000, and a center pipe 5000. A hollow shaft 3000 penetrates through the disc structure 1000 of the disc dryer, and a central tube 3000 is disposed inside the hollow shaft through the hollow shaft along the axial direction of the hollow shaft 5000, one end of the central tube being closed, and the other end thereof being inserted into a water outlet tube 4000. A branch pipe 2000 is inserted between the hollow shaft 3000 and the center pipe 5000, one end of the branch pipe 2000 is in fluid communication with the cavity of the disk structure 1000, and the other end is in fluid communication with the center pipe 5000, and the branch pipe 2000 is inserted into the center pipe 5000 to a depth exceeding the center line of the center pipe 5000, i.e., the branch pipe 2000 is inserted into the center pipe 5000 to a depth at least greater than the radius of the center pipe 5000. One end of the water outlet pipe 4000 is inserted into the center pipe 5000, and the other end is communicated with the outside. And, the diameter of the outlet pipe 4000 is smaller than that of the central pipe 5000.

According to a preferred embodiment of the present application, the central tube 5000 is welded and fixed to the hollow shaft 3000, the water outlet tube 4000 is welded and fixed to the hollow shaft 3000, and the branch tube 2000 is welded and fixed between the hollow shaft 3000 and the central tube 5000.

Also, as shown in fig. 14, the hollow shaft 3000 is provided with a plurality of openings 6000, which are capable of being in fluid communication with the cavity of the disc structure 1000.

According to an embodiment of the present application, the branch pipes 2000 correspond one-to-one to the water grooves formed by the long and short water baffles in the disc structure 1000, and are in fluid communication with the corresponding water grooves.

The relative rotation of the steam relative to the disc structure 1000, the hollow shaft 3000, the central pipe 5000, the water outlet pipe 4000 and other components is anticlockwise rotation, and at the moment, the disc structure 1000, the hollow shaft 3000, the central pipe 5000, the water outlet pipe 4000 and the branch pipe 2000 rotate clockwise around the center. When steam is introduced, the steam firstly enters the hollow shaft 3000, enters the disc structure 1000 through the opening 6000 in the hollow shaft 3000, and enters the central tube 5000 through the branch tube 2000 after the air and the like in the disc structure 1000 rotates anticlockwise for a circle in the disc structure 1000 without condensing the steam. The long water baffle in the disc structure 1000 separates the cavities in the disc structure 1000, so that the steam entering the disc structure 1000 can only rotate for one circle in the counterclockwise direction and then enters the branch pipe 2000, and the air and the like in the disc structure 1000 are blown out without condensing steam by the method.

During normal operation, because a certain amount of accumulated water is in the central tube 5000, and because the depth of the branch tube 2000 inserted into the central tube 5000 exceeds the center line of the central tube 5000, when the branch tube 2000 rotates to the lower part of the hollow shaft 3000, the accumulated water in the central tube 5000 cannot flow back to the disc structure 1000, and the heat exchange effect of the disc structure is ensured.

When the discharging structure is used, the pipe diameter of the central pipe 5000 is thick, the pipe diameter of the water outlet pipe 4000 is relatively thin, accumulated water inside the central pipe is easily generated in the process of outwards discharging water in a self-flowing mode (as shown in fig. 15), the accumulated water can cause heat loss of steam in a disc structure, and when equipment stops, the accumulated water can also cause corrosion of the central pipe.

The present application further provides a discharge structure as shown in fig. 16 to 24, which can further discharge accumulated water in the disk structure, not only ensure the heat of steam in the disk structure, but also better protect the central tube.

As shown in fig. 16-18, which illustrate an example of one discharge vane in the center tube shown in fig. 13 and 14.

As shown in fig. 16 and 17A, the drainage structure further includes a drainage vane 7000 provided in the center pipe 5000, the drainage vane 7000 being hollow inside and extending along the circumference of the center pipe 5000 against the inner wall of the center pipe 5000 so as to be able to better drain accumulated water inside the center pipe 5000, for example, accumulated water inside the center pipe as shown in fig. 15. As shown, the drain vane 7000 has a curved shape along the inner wall of the center pipe 5000.

One end of the water outlet pipe 4000 extends into the central pipe 5000 for a length. The drain blade 7000 has one end connected (e.g., fixedly connected) to a portion of the outlet pipe 4000 extending into the center pipe 5000 and in fluid communication with the outlet pipe 4000, and the other end having an opening.

One end of the outlet pipe 4000 to which the drain blade 7000 is connected is provided with a blocking cover 4001 for closing one end of the outlet pipe 4000, thereby preventing water from flowing out from the end of the outlet pipe 4000. According to a preferred embodiment of the present application, the blocking cover 4001 is fixedly welded to the outlet pipe 4000.

Ponding in the center pin 5000 can enter drainage blade 7000 through drainage blade 7000's opening to through drainage blade 7000's rotation send ponding into outlet pipe 4000 in, thereby the water of low water level in the center tube 5000 takes the high water level of outlet pipe through drainage blade 7000, then flows away through the effect of flowing automatically.

To ensure that water entering the outlet pipe 4000 does not flow back into the central pipe 5000, the opening of the drain vane 7000 extends beyond the line connecting the downstream located connection point of the drain vane 7000 and the outlet pipe 4000 to the highest point of the outlet pipe 4000 located between the connection point of the drain vane 7000 and the outlet pipe 4000.

For example, as shown in fig. 17B, when a line ao connecting a connection point a of the drain vane 7000 and the outlet pipe 4000 located downstream and a highest point o of the outlet pipe 4000 located between the connection points of the drain vane 7000 and the outlet pipe 4000 is in a horizontal state, a position B where the opening of the drain vane 7000 is located extends beyond the horizontal line ao connecting the connection point a and the point o.

When a and o are in a horizontal state, a part of water in the central pipe 5000 starts to flow back into the drain vane 7000. The opening of the drain vane 7000 is located at a position b higher than this horizontal line, and water does not flow back from the opening of the drain vane 7000 into the center pipe 5000.

As shown in fig. 18, which shows a schematic view of the drainage process of the drainage structure with one drainage vane.

In the operation process of the disc drier, the drainage blades 7000 are arranged, so that accumulated water in the central tube can be drained, and the heat of steam in the disc structure is guaranteed, so that the central tube can be better protected.

As in fig. 19A, which shows a drainage structure with two drainage vanes 7100. The other arrangement of the discharge structure shown in fig. 19A is substantially the same as that of the discharge structure shown in fig. 16 except that two drain blades 7100 are provided in the center pipe 5000, for example, the drain blades 7100 are provided in the center pipe 5000 and extend along the circumference of the center pipe 5000 against the inner wall so as to be able to better drain accumulated water inside the center pipe 5000, and the inside of the drain blades 7100 is hollow, and thus, the same portions as those of the embodiment shown in fig. 16 are omitted here.

As shown in fig. 19A, two drainage structures 7100 in the center tube 5000 are oppositely disposed along the circumference of the portion of the outlet tube 4000 extending into the center tube 5000, i.e., spaced 180 degrees apart along the circumference of the outlet tube 4000.

To ensure that water entering the outlet pipe 4000 does not flow back into the central pipe 5000, the opening of the drain blade 7100 extends beyond the line connecting the downstream connection point of the drain blade 7100 and the outlet pipe 4000 with the center point of the central pipe 4000.

For example, as shown in fig. 19B, when a connection point a of the downstream of the drainage vane 7100 and the outlet pipe 4000 is horizontal to a connection line ao 'of a central point o' of the central pipe 4000, the opening of the drainage vane 7100 is located at a position B extending beyond the horizontal connection line ao 'of the connection point a and the central point o'.

When the line a and o' is horizontal, a part of water in the central pipe 5000 starts to flow back into the drainage blades 7100. The opening of the drain blade 7100 is located at a position b higher than this horizontal line, and water does not flow back into the center tube 5000 from the opening of the drain blade 7100.

Moreover, when two drainage blades are arranged in the central pipe 5000, two groups of drainage blades 7100 can send water into the water outlet pipe 4000 from the central pipe 5000 every time the drainage mechanism rotates for one circle, and if the same drainage flow rate as that when a single drainage blade is arranged is ensured, the water level in the water outlet pipe 4000 cannot be lower than half.

As shown in fig. 20, which shows a schematic view of the drainage process of the drainage structure with two drainage vanes.

Of course, multiple sets of drainage vanes may be provided within the center tube 5000 as desired.

Like the discharge structure with one drainage blade, two or more drainage blades are arranged in the central tube, accumulated water in the central tube can be discharged, and heat of steam in the disc structure is guaranteed, so that the central tube can be better protected.

As shown in fig. 21 to 24, which illustrate a discharge structure provided with a reducer joint between a central pipe and a water outlet pipe.

As shown, the discharge structure according to the present embodiment includes a center pipe 5000, a water outlet pipe 4000, and a variable diameter joint 8000 provided between the center pipe 5000 and the water outlet pipe 4000. The diameter of the central pipe 5000 is larger than that of the water outlet pipe 4000, the large end of the reducing joint 8000 is connected with the central pipe 5000, and the small end is connected with the water outlet pipe 4000. A plurality of spiral blades 7200 are provided in the reducer joint 8000, the spiral blades 7200 overlap each other, and each of the spiral blades has a spiral line shape (as shown in fig. 21 to 23). Also, the spiral blades 7200 are provided along the circumference of the inner wall of the reducer 8000, and preferably, they are provided at equal intervals along the circumference of the inner wall of the reducer structure.

As shown in fig. 23, the spiral vane 7200 has a relatively small thickness and a relatively large width. As shown in fig. 21, the side surface of the spiral blade 7200 is connected to the inner wall of the reducer 8000, and is fixed to the inner wall of the reducer 8000 by welding, for example.

As shown in fig. 24, in the process of discharging water by the helical blade 7200, a first point d of the helical blade 7200 near the central axis of the reducer 8000 is higher than a second point e at which the helical blade 7200 is connected to the large end of the reducer 8000, and the second point e is higher than a third point f at which the helical blade 7200 is connected to the small end of the reducer 8000.

When the hollow shaft 3000 rotates, the central tube 5000 is driven to rotate, and then the reducing joint 8000 and the helical blade 7200 are driven to rotate, water flows from a high point to a low point through the helical blade 7200, so that water flows to the joint of the helical blade 7200 and the large end of the reducing joint 8000, and flows to the joint of the helical blade 7200 and the small end of the reducing joint 8000 from the joint, and the collected water flows into the water outlet tube automatically under the action of gravity, and then liquid is transferred to the high-water-level position from the low water level.

Through the discharge structure who has helical blade, can discharge the ponding of the intraduct in the center tube, guaranteed the heat of the interior steam of disc structure to protection center tube that can be better.

And, according to still another aspect of the present application, there is provided a disc dryer including any one of the above-described discharge structures.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A drain structure for a disc dryer, the drain structure comprising:

a hollow shaft (3000), said hollow shaft (3000) passing through a disc structure (1000) of said disc dryer, said hollow shaft (3000) being provided with a plurality of openings (6000), and said openings (6000) being in fluid communication with a cavity of said disc structure (1000);

a center pipe (5000), the center pipe (5000) being disposed inside the hollow shaft (3000) through the hollow shaft (3000) in an axial direction of the hollow shaft (3000), and one end of the center pipe (5000) being closed;

a branch pipe (2000), one end of the branch pipe (2000) is in fluid communication with the cavity of the disc structure (1000), the other end of the branch pipe (2000) is in fluid communication with the center pipe (5000), and the depth of the branch pipe (2000) inserted into the center pipe (5000) is at least greater than the radius of the center pipe (5000); and

a water outlet pipe (4000), a first end of the water outlet pipe (4000) entering the other end of the central pipe (5000) and being in fluid communication with the other end of the central pipe (5000), and a second end of the water outlet pipe (4000) being in communication with the outside.

2. The discharge structure according to claim 1, wherein said disc structure (1000) comprises water-retaining grooves, said branch pipes (2000) corresponding one-to-one to said water-retaining grooves and being in fluid communication therewith.

3. The drainage structure according to claim 1 or 2, wherein a drainage vane extending along a circumference of the center pipe (5000) against an inner wall of the center pipe (5000) is provided in the center pipe (5000), an inside of the drainage vane is hollow, and a first end of the drainage vane is in fluid communication with the outlet pipe (4000), and a second end of the drainage vane is provided with an opening.

4. A drainage arrangement according to claim 3, characterised in that one of the drainage vanes is arranged in the central tube (5000), the opening of the drainage vane extending beyond the line connecting the downstream located connection point of the drainage vane and the outlet pipe (4000) with the highest point of the outlet pipe (4000) located between the connection point of the drainage vane and the outlet pipe (4000).

5. A discharge arrangement according to claim 3, characterised in that a plurality of said drainage vanes are arranged in the central tube (5000), the openings of the drainage vanes extending beyond the line between the connection point of the drainage vanes and the outlet tube (4000) downstream and the centre point of the central tube (4000).

6. The drainage structure according to claim 5, wherein two of the drainage vanes are provided in the center pipe (5000), and the one ends of the two drainage vanes are provided at an interval of 180 degrees along the outer circumference of the center pipe (4000).

7. The drainage structure according to claim 4 or 5, characterized in that the first end of the outlet pipe (4000) is provided with a closure (4001) for closing the outlet pipe (4000), preferably the closure (4001) is welded on the outlet pipe (4000).

8. The discharge arrangement according to claim 1 or 2, characterized in that the discharge arrangement further comprises a reducer union (8000) arranged between the central pipe (5000) and the outlet pipe (4000), in which reducer union (8000) a plurality of helical blades (7200) are arranged, preferably the helical blades (7200) are arranged at equal intervals along the circumference of the inner wall of the reducer union (8000), and preferably the helical blades (7200) have the shape of a helix.

9. The exhaust structure according to claim 8, wherein the side of the screw blade (7200) is provided on the inner wall of the reducer union (8000), and a first point of the screw blade (7200) near the central axis of the reducer union (8000) is higher than a second point where the screw blade (7200) is connected to the large end of the reducer union and the second point is higher than a third point where the screw blade (7200) is connected to the small end of the reducer union during the drainage by the screw blade (7200).

10. A disc dryer, characterized in that it comprises a discharge structure according to any one of claims 1 to 9.

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