WO2019074084A1 - Heat exchanging device for powder material - Google Patents

Abstract

Provided is a heat exchanging device including a heat exchanger which is easy to match with the size of a heat exchange container and the characteristics of the powder to be treated. The heat exchanging device for powder comprises: a heat exchange container having a treatment material supply port for supplying the powder from above and a treatment material discharge port for discharging the powder from below; a heat exchange unit provided inside the heat exchange container; and a header tank for supplying a heat exchange medium to a plurality of heat exchange pipes. The heat exchange unit has a heat exchange pipe including an outer tube composed of a hollow twisted tube extending in the vertical direction. The heat exchange pipe includes an inner tube disposed in the outer tube. The upper end of the outer tube is open and connected to a second header tank, and the lower end of the outer tube is closed. Both ends of the inner tube are open, the upper end is connected to a first header tank, and the lower end extends to the vicinity of the lower end of the outer tube. The heat exchange medium supplied from the first header tank passes through the inside of the inner tube, passes between the outer tube and the inner tube, and is returned to the second header tank.

Description

Powder Heat Exchanger

TECHNICAL FIELD The present invention relates to a heat exchange device for granular material, and more particularly to a heat exchange device for heating or cooling granular material by conductive heat transfer (indirect heating) with a heat exchange medium.

DESCRIPTION OF RELATED ART Conventionally, there existed a thing as described in patent document as a heat exchange apparatus of a granular material.

JP 2000-71285 A

However, in order to perform heat exchange inside the heat exchange vessel with one spiral tube, a part is tapered, and according to the size of the heat exchange vessel and to the characteristics of the granular material to be treated In addition, it is necessary to prepare a special heat exchange pipe.

Therefore, an object of the present invention is to provide a heat exchange device including a heat exchanger which can be easily matched to the size of the heat exchange container and the characteristics of the granular material to be treated.

The heat exchange device for powder and granular material according to the present invention includes a heat exchange container having a treated material supply port for supplying powder and granular material from above and a treated material discharge port for discharging powder and granular material from below, and a heat exchange container. And a heat exchange portion provided inside the heat exchange portion, the heat exchange portion having a heat exchange pipe including an outer pipe constituted by a hollow torsion pipe extending in the vertical direction.

By providing the outer pipe of the heat exchange pipe constituted by the hollow torsion pipe extending in the vertical direction in the heat exchange vessel, the piston flow property of the granular material is maintained and compared to the heat exchange pipe constituted by the straight pipe. A heat exchanger having a large heat transfer area can be formed.

Since the outer pipe of the heat exchange pipe can be formed by twisting the straight pipe, etc., a heat exchange pipe in which a part of the straight pipe is squeezed to form a substantially spherical convex portion or a spiral pipe is used. Compared with the form which uses the heat exchange pipe constituted by the heat exchange pipe constituted by the pipe of the triangular wave shape using the heat exchange pipe constituted by the size of the heat exchange container and the characteristic of the granular material to be treated easily (In particular, a heat exchange pipe adapted to a small diameter heat exchange vessel) can be prepared.
Further, the processing of the heat exchange pipe and the production of the heat exchange section are easy, and the cost can be reduced.

Preferably, the heat exchange unit has a plurality of heat exchange pipes.

By arranging a plurality of heat exchange pipes, it is possible to easily increase the heat transfer area, and using the inclination of the spiral formed on the surface of the torsion tube, the lateral (horizontal) movement of the granular material It is possible to promote uniform treatment of powder and powder.

In addition, the outer pipe of the heat exchange pipe constituted by the hollow torsion pipe has a positional relationship with the adjacent heat exchange pipe compared with the form provided with a plurality of heat exchange pipes constituted by a spiral pipe or a triangular pipe. It can be easily arranged so that no interference occurs.
Therefore, since the heat exchange pipes can be disposed densely as compared with the case where the above three types of heat exchange pipes are used, a heat exchanger having a larger heat transfer area can be formed.

More preferably, the heat exchange pipe further includes a tank for supplying a heat exchange medium to the plurality of heat exchange pipes, the heat exchange pipe including an inner pipe inserted into the outer pipe, and the tank is provided with an upper portion of the heat exchange pipe One end of the lower part, the end of the outer pipe on which the tank is provided is open and connected to the second tank, the other end is closed, the both ends of the inner pipe are open The end on the same side as the outer pipe is connected to the first tank, and the other end extends near the closed end of the outer pipe, and the heat exchange medium supplied from the first tank is the inner side of the inner pipe After passing between the outer pipe and the inner pipe, it is returned to the second tank.

When the heat exchange medium passing through the inside of the inner pipe charged into the outer pipe passes between the outer pipe and the inner pipe, heat exchange is performed with the powder particles flowing down the inside of the heat exchanger. The powder is heated or cooled.
Therefore, it is possible to arrange the tank for supplying the heat exchange medium to the heat exchange pipe and the tank for discharging the heat exchange medium from the heat exchange pipe together in the upper part or the lower part of the heat exchange pipe.

More preferably, the tank is provided at the upper portion of the heat exchange pipe, and a dispersion member for dispersing the powder particles is provided at the lower portion of the treatment material supply port, and the tank is a supply passage extending downward from the treatment material supply port. Provided around the

Since the processed material (particulate matter) does not pass through the upper portion of the tank, the stagnation of the processed material does not occur in the upper portion of the tank.

More preferably, the dispersing member is provided with a projecting member extending outward and obliquely downward from the dispersing member.

In addition, preferably, at least the outer wall of the inner pipe is formed of a member having a lower thermal conductivity than the outer pipe.

Because the inner pipe or the member covering the inner pipe has a low thermal conductivity, when the heat exchange medium passes through the inner side of the inner pipe, heat exchange is performed between the outer pipe and the heat exchange medium passing between the inner pipe. And the temperature of the heat exchange medium hardly changes.
And, since the heat exchange medium is supplied to (the passage of) between the outer pipe and the inner pipe while maintaining the temperature at the time of supply substantially, the temperature difference with the processed material (powder and particle) there is large, the efficiency Good heat exchange can be performed.

In addition, preferably, the hollow torsion tube constituting the outer tube has a polygonal cross-section or an elliptical cross-section.

For this reason, it is possible to select an optimal hollow torsion tube according to the physical properties (size, shape, etc.) of the processed material.

Also, preferably, the hollow torsion tube constituting the outer tube has a shape provided with a protrusion on the outer surface thereof.

By providing the projections, it is possible to form a heat exchanger having a large heat transfer area, as compared with the embodiment in which the projections are not provided.

In addition, preferably, the outer tube of the hollow torsion tube is configured by twisting the cylindrically shaped object without shifting the central axis, and the cylindrically shaped object is provided with fins at corners of a substantially rectangular horizontal cross section. It has a straight shape in the vertical direction, and the fin extends in a curvilinear shape from the corner.

In addition, preferably, the inclination angle of the spiral formed on the surface of the torsion tube constituting the outer tube is larger than a value obtained by subtracting 5 degrees from the repose angle of the granular material.

It is difficult to form an air gap between the lower part of the spiral formed on the surface of the torsion pipe and the powder particle layer, and it becomes possible to perform heat exchange efficiently using the entire heat exchange pipe.

As described above, according to the present invention, it is possible to provide a heat exchange device including a heat exchanger that can be easily matched to the size of the heat exchange container and the characteristics of the powder particles to be treated.

It is a partially broken block diagram of the heat exchange device of the granular material in a 1st embodiment. It is a perspective view of a 1st straight pipe. It is a perspective view of the outer pipe formed by twisting the first straight pipe. It is a figure which shows the upper surface etc. of a heat exchange part by the AA line cross section of FIG. It is a figure which shows the horizontal cross section etc. of a heat exchange part by the BB line cross section of FIG. It is the enlarged view of the heat exchange pipe provided with the buffer member in FIG. FIG. 5 is a cross-sectional view taken along a line CC in FIG. 4 and showing a longitudinal cross section and the like of the heat exchange unit. It is a perspective view of a 2nd straight pipe. It is a perspective view of the outer pipe formed by twisting the second straight pipe. It is a perspective view which shows the positional relationship of four heat exchange pipes, 1st header tank, and 2nd header tank which were arranged on the straight line on the horizontal direction. It is a perspective cross-sectional view which shows the positional relationship of the header tank in 2nd Embodiment, a heat exchange pipe, a feed hopper, and a dispersion | distribution member. It is a perspective view showing the detailed composition of a heat exchange pipe. It is a perspective view of a 3rd straight pipe. It is a horizontal sectional view of the 3rd straight pipe. It is a perspective view of the outer pipe formed by twisting the third straight pipe. FIG. 10 is a perspective view of a dispersing member provided with first to fourth projecting members.

The first embodiment will be described below with reference to the drawings (see FIGS. 1 to 10 and FIGS. 13 to 15).

The heat exchange device for powder and granular material in the first embodiment includes a heat exchange container 1, a constant amount supply device 7, a constant amount discharge device 8, a load cell 9, a first bellows type expansion pipe joint 11a, a second bellows type expansion pipe joint 11b, A heat exchange unit 20 is provided (see FIG. 1).

The heat exchange container 1 has a cylindrical main body 2, a lid 3 at the upper part thereof, and a conical part 4 formed at the lower part of the main body 2.
The lid 3 has a frusto-conical shape (also referred to as a substantially frusto-conical shape) whose upper portion is narrow and whose lower portion is wide, and the upper end is opened as the treatment material supply port 5.
The pyramidal portion 4 has a frusto-conical shape (also referred to as a generally frusto-conical shape) in which the upper portion is wide and the lower portion is narrow, and the lower end is opened as the treated material outlet 6. The half apex angle φ of the pyramidal portion 4 is preferably 60 degrees or less.

The quantitative supply device 7 is a device for quantitatively supplying the processed material (particulate matter) into the heat exchange container 1, and for example, a screw feeder is used.
The metering discharge device 8 is a device for metering the processed material out of the heat exchange container 1, and for example, a rotary valve is used.

The load cell 9 is used to measure the weight of the heat exchange vessel 1.
The quantitative supply device 7 is connected to the processing material supply port 5 via the first bellows type expansion joint 11a so that the weight measurement of the heat exchange container 1 is not affected, and the quantitative discharge device 8 is the second one. The treatment object outlet 6 is connected via a bellows type expansion joint 11b.

The heat exchange unit 20 includes a heat exchange pipe 21 extending in the vertical direction, and a header tank 24 (first header tank 24 a, second header tank 24 b) in which the upper ends of the heat exchange pipe 21 are connected. The heat exchange medium flows, and the heat exchange medium heats or cools the particles in the heat exchange container 1.

The heat exchange portion 20 in the first embodiment includes a heat exchange pipe 21 having a double structure of an outer pipe 21a and an inner pipe 21b, and a first header tank 24a connected to the upper end of the inner pipe 21b of the heat exchange pipe 21. The second header tank 24 b is connected to the upper end of the outer pipe 21 a of the heat exchange pipe 21.

In the case where the inner diameter of the main body 2 of the heat exchange container 1 is relatively large and only one treated material supply port 5 is provided in the lid 3, the heat exchange section 20 is the inside of the main body 2 or the lid 3. A louver or other dispersing device (not shown) may be provided in the upper part of the in order to disperse and drop the processed material.

The heat exchange container 1 (main body 2, lid 3, cone 4) has a jacket structure (not shown), and the same heat exchange medium as flowing in the heat exchange pipe 21 flows inside, and the heat exchange container It is preferred to heat or cool 1 from its outer surface.
Moreover, it may replace with the said jacket structure, and may be a form which provides a heat retention apparatus or cold storage apparatus in the outer side of the heat exchange container 1, and may be a form which provides a heat retention apparatus or cold storage apparatus outside the said jacket structure. .

In the first embodiment, the upper end of the heat exchange pipe 21 is held by the main body 2 via the header tank 24, and the lower end of the heat exchange pipe 21 is held by the main body 2 via the mounting bracket 25.
In addition, the lower end of the heat exchange pipe 21 is not held in the main body 2 via the mounting bracket 25, but the heat exchanging pipe 21 is integrated (at the lower end) by fixing the lower end to the mounting bracket 25. May be.

The outer tube 21a is made of a stainless steel (for example, SUS304, SUS316), a metal such as titanium or hastelloy, and is formed of a hollow cylindrical torsion tube.
The upper end of the outer pipe 21a is open and communicates with the hole provided in the second header tank 24b.
The lower end of the outer tube 21a is sealed by welding a sealing plate 21d.
If the plug is screwed into the lower end (sealing portion), the drain accumulated in the heat exchange pipe 21 can be easily drained.

The hollow twisted tube constituting the outer tube 21a is formed by twisting a straight tube having a square horizontal cross section (the first straight tube 22a, see FIG. 2) without shifting the central axis (FIG. 3). reference).
The hollow torsion tube is not limited to the above shape, and is formed by twisting a cylindrical shaped object having a horizontal cross section having a triangular, rectangular, pentagonal or more substantially polygonal shape or a substantially elliptical shape, It is also good.
For this reason, the horizontal cross section of the outer tube 21a has a substantially polygonal or substantially elliptical shape.

The inner pipe 21b is disposed inside the outer pipe 21a, and at least the outer wall is made of a member having a low thermal conductivity such as polyvinyl chloride (at least a thermal conductivity lower than the outer pipe 21a), or a metal such as stainless steel The tube is coated with a low thermal conductivity material and is configured in the form of a hollow cylinder.
Further, the entire inner pipe 21b may be a hose made of resin such as polyvinyl chloride, silicone, polytetrafluoroethylene or the like.
The upper end and the lower end of the inner pipe 21b are open.
The upper end of the inner pipe 21b communicates with the hole provided in the first header tank 24a.
The lower end of the inner pipe 21b is located inside the outer pipe 21a and near the lower end.

In order to prevent the inner pipe 21b from swinging when the heat exchange medium flows inside the inner pipe 21b and between the outer pipe 21a and the inner pipe 21b, the inner pipe 21b is interposed with a buffer member 21c such as a spacer. It is desirable that the outer tube 21a be held by the outer tube 21a (see FIG. 6).
Although FIGS. 5 and 7 show an example in which the buffer member 21c is provided only to the heat exchange pipe 21 at the left end, the buffer member 21c is similarly provided to the other heat exchange pipes 21 (not shown). Shown).

It is desirable that the inner pipe 21b be configured to the outer pipe 21a formed of a hollow torsion pipe so that the distance between the inner wall of the outer pipe 21a and the outer wall of the inner pipe 21b changes in the height direction.
For example, a mode is conceivable in which the inner pipe 21b is configured in a cylindrical shape that has an outer diameter different in the height direction with respect to the outer pipe 21a configured by a hollow twisted pipe.

The heat exchange medium supplied from the first pipe 26a through the first header tank 24a flows downward inside the inner pipe 21b, enters the lower end of the heat exchange pipe 21, and the heat exchange medium reaching the lower end is: It flows upward between the outer pipe 21a and the inner pipe 21b, and is discharged from the upper end of the heat exchange pipe 21 through the second header tank 24b and the second pipe 26b (see FIG. 7).

The above is an apparatus configuration in the case of using a liquid (cold water, warm water, heat medium oil, etc.) as a heat exchange medium, and when using a gas such as steam as the heat exchange medium, It is preferable to place the case upside down.
That is, it is preferable to arrange the header tank 24 below the main body 2 of the heat exchange container 1 and connect the lower end portion of the heat exchange pipe 21 extending in the vertical direction to the upper surface of the header tank 24. The configuration of the outer pipe 21a and the inner pipe 21b and their connection with the header tank 24 (the first header tank 24a and the second header tank 24b) are also the same as the above except that the arrangement is upside down. .

Since the inner pipe 21b or the member covering the inner pipe 21b has a low thermal conductivity, when the heat exchange medium passes through the inner side of the inner pipe 21b, the heat exchange medium passes between the outer pipe 21a and the inner pipe 21b. Heat exchange is difficult, and the temperature of the heat exchange medium hardly changes.
Then, the heat exchange medium is supplied to (the passage of) between the outer pipe 21a and the inner pipe 21b while maintaining the temperature at the time of supply substantially, so the temperature difference with the processed material (particulate matter) there is large , Efficient heat exchange can be performed.

When the inclination angle (lead angle) θ of the spiral formed on the surface of the torsion pipe constituting the outer pipe 21a is the repose angle of the powder or granular material to be treated by the heat exchange device (when the powder or granular material is poured freely on the horizontal surface It is preferable that the base angle of the mountain formed by the granular material is larger than ± 5 degrees of JIS Industrial Term Dictionary 5th Edition (Japan Standards Association) (see FIG. 7).
Moreover, although it changes also with the physical properties of the granular material to process, it is preferable that inclination | tilt angle (theta) of a helix is 50 degrees or more.

When the inclination angle θ of the spiral is made larger than the repose angle ± 5 degrees of the granular material or larger than 50 degrees, the space between the lower part of the spiral formed on the surface of the torsion tube and the granular material layer It is difficult to form an air gap, and heat exchange can be performed efficiently using the entire heat exchange pipe 21.
When the inclination angle θ of the spiral is small, an air gap is formed between the lower portion of the spiral and the granular material layer, and efficient heat exchange with the heat exchange medium flowing in the heat exchange pipe 21 is difficult to be performed.
The inclination angle may be changed depending on the position of the outer pipe 21a in the vertical direction, and the direction of the inclination may be reversed in the middle of the outer pipe 21a.

The heat exchange pipe 21 may be configured as a single pipe, or may be configured as two or more pipes.

Note that, for example, a cylindrical shaped object (second straight pipe 22b (see FIG. 8) having a shape having a fin (protrusion) provided by bending a corner having a substantially square horizontal cross section and linearly extending in the vertical direction, Apply twist to the cylindrical shape with three straight pipes 22c (see Fig. 13 and 14) and various projections (eg, umbrella-shaped projections) on the outer surface of the straight pipe without shifting the central axis. The hollow torsion tube which comprises the outer tube 21a may be formed (refer FIG. 9, FIG. 15).
By providing the projections, it is possible to form a heat exchanger having a large heat transfer area, as compared with the embodiment in which the projections are not provided.

The fin 22b1 in the second straight pipe 22b has a shape extending linearly from the substantially square corner that constitutes the horizontal cross section.
The straight line of the linearly extending portion is parallel to (on the same straight line as) a side in contact with the linearly extending portion of the substantially square sides forming the horizontal cross section when viewed in the vertical direction.
Four fins 22b1 in the second straight pipe 22b are provided and extend from each of the substantially square sides forming the horizontal cross section.

The fins 22c1 in the third straight pipe 22c have a shape extending in a curvilinear manner from corners of a substantially square forming a horizontal cross section.
The curve of the portion extending in the curvilinear form has a tangent line 22c2 of a portion in contact with the corner of the substantially square forming the horizontal cross section in the curve, as viewed from the up and down direction, of the sides of the substantially square forming the horizontal cross section Parallel to the side in contact with the part extending in the shape (colinear).
Four fins 22c1 in the third straight pipe 22c are provided and extend from each of the substantially square sides forming the horizontal cross section.

As in the case of the fins 22c1 of the third straight pipe 22c, by having the shape extending in a curvilinear shape, it is possible to easily push the granular material in the outward direction as compared with the form having a shape extending linearly.

Alternatively, the outer tube 21a may be formed by twisting a deformed tube having asperities such as a horizontal cross section.

In addition, the projection may be provided on the straight pipe before applying the twist, but the projection is provided after the twist is applied to the straight pipe without the projection (the first straight pipe 22a). May be

A plurality of heat exchange pipes 21 arranged in a straight line in the horizontal direction are respectively connected to one header tank 24 (first header tank 24a and second header tank 24b) (see FIGS. 7 and 10).

The header tank 24 is a straight pipe whose vertical cross section has an oval shape (long oval shape), the upper part constitutes a first header tank 24 a, and the lower part constitutes a second header tank 24 b.
In FIG. 7, the header tank 24 has a two-layer structure of upper and lower layers, but may be independent header tanks 24a and 24b.

In order to prevent the processed material on the upper surface of the header tank 24 from staying, the direction of the major axis is vertically arranged so as to be vertically long. The upper surface of the header tank 24 may be formed in a triangular shape in cross section with a pointed upper portion.

The first pipe 26a is connected to one end of the first header tank 24a, and the other end is closed. The second pipe 26b is connected to one end of the second header tank 24b, and the other end is closed.

By providing the outer pipe 21a of the heat exchange pipe 21 composed of a hollow torsion pipe extending in the vertical direction in the heat exchange vessel 1, the piston flow property of the granular material is maintained while maintaining the straight pipe (first straight pipe 22a, 22 It is possible to form a heat exchanger having a large heat transfer area as compared with the heat exchange pipe constituted by the second straight pipe 22b and the third straight pipe 22c).

Since the outer pipe 21a of the heat exchange pipe 21 can be formed by twisting the straight pipe or the like, a heat exchange pipe in which a substantially spherical convex portion is formed by squeezing a part of the straight pipe or a spiral The size of the heat exchange vessel 1 and the characteristics of the granular material to be treated are easily compared to the case of using a heat exchange pipe composed of a tube or using a heat exchange pipe composed of a triangular wave tube. It is possible to prepare a suitable one (in particular, the heat exchange pipe 21 matched to the small diameter of the heat exchange vessel 1).

Further, the heat transfer area can be easily increased by arranging a plurality of heat exchange pipes 21, and by using the inclination of the spiral formed on the surface of the torsion pipe, the lateral direction (horizontal ) Can be promoted, and uniform treatment of the powder can be achieved.
In addition, although the case where the inclination direction of all the heat exchange pipes 21 was the same was shown in FIG.1, FIG.7, FIG.10, you may arrange | position the heat exchange pipes 21 twisted in the opposite direction alternately, for example.

In addition, the outer pipe 21a of the heat exchange pipe 21 formed of a hollow twisted pipe and the heat exchange pipe adjacent to each other as compared with a configuration in which a plurality of heat exchange pipes formed of a spiral pipe and a triangular pipe are provided. It can be easily arranged so that positional interference does not occur.

The heat exchange pipe 21 has a double structure of the outer pipe 21a and the inner pipe 21b, and the heat exchange medium passing through the inner side of the inner pipe 21b inserted in the outer pipe 21a is the same as the inner side of the outer pipe 21a. As it passes between the tubes 21b, heat exchange is performed with the powder particles flowing down in the heat exchange vessel 1, and the powder particles are heated or cooled.
Therefore, the header tank for supplying the heat exchange medium to the heat exchange pipe 21 (first header tank 24a) and the header tank for discharging the heat exchange medium from the heat exchange pipe 21 (second header tank 24b) It becomes possible to arrange collectively in the upper part or the lower part of the exchange pipe 21. FIG.

Further, since the inner pipe 21b is formed of a member having a low thermal conductivity, when the heat exchange medium passes through the inside of the inner pipe 21b, the heat exchange medium passes between the outer pipe 21a and the inner pipe 21b. Heat exchange is difficult to be performed, and when flowing between the outer pipe 21a and the inner pipe 21b, efficient heat exchange with the granular material can be performed.

Next, the method for cooling the powdery particles using the heat-exchange device for powdery particles of the present invention will be described.

With the fixed amount discharge device 8 stopped, the operator uses a pump (not shown) or the like to supply cooling water (heat exchange medium) of a constant temperature from the heat exchange medium source to the heat exchange medium supply pipe (first pipe 26a). The heat exchange unit 20 is quantitatively supplied via
Here, although the heat exchange medium is described as water, the same applies to other liquids such as heat carrier oil.

The cooling water supplied to the heat exchange unit 20 passes from the heat exchange medium supply pipe (first pipe 26a) to the inner pipe 21b of each heat exchange pipe 21 via the first header tank 24a, and the outer pipe 21a and the inner pipe 21b. , And then return to the heat exchange medium source via the second header tank 24b and the heat exchange medium discharge pipe (second pipe 26b) and cooled again to a constant temperature.

Next, the operator activates the quantitative supply device 7 to continuously supply the processed material (raw material, powder and particles) into the heat exchange vessel 1.

When the weight of the processed material in the heat exchange container 1 is continuously measured by the load cell 9 and reaches a predetermined weight, the operator activates the metering discharge device 8 to continuously process the processed material from the heat exchange container 1. Let it drain.

The operator controls the rotational speed of the metering discharge device 8 so that the weight of the processed material in the heat exchange container 1 becomes constant.

In addition, the temperature of the processing object is continuously measured by a thermometer (not shown) installed in the pyramidal portion 4 located below the heat exchange unit 20, and the operator can measure the temperature of the processing object based on the measurement result. Perform temperature control.

Even after the processed material in the quantitative supply device 7 is exhausted or the quantitative supply device 7 is stopped and the supply of the processed material into the heat exchange vessel 1 is finished, the cooling process of the processed material is continued.

After all the processed material in the heat exchange container 1 is discharged, the operator stops the quantitative discharge device 8 and also stops the supply of the cooling water.

Note that the present invention is not limited to a configuration in which a plurality of header tanks 24 connected to a plurality of heat exchange pipes 21 disposed in a straight line in the horizontal direction are provided (first embodiment, see FIGS. 1 to 10). May be connected to all the heat exchange pipes 21.

For example, as shown in FIG. 11, a substantially cylindrical header tank 24 may be provided on the radially arranged heat exchange pipes 21 and may be connected to the heat exchange pipes 21 (second embodiment) Form).

In this case, the heat exchange container 1 has a cylindrical main body 2 and a conical portion (not shown) formed in the lower part of the main body 2, and the header tank 24 is flanged or the like in the upper part of the main body 2. It is connected.

The header tank 24 includes three hollow disk-shaped upper plates 24c, a middle plate 24d and a lower plate 24e, a substantially cylindrical supply pipe 5a fixed to the inner side surface thereof, and the lower surface or the outer surface thereof. It is comprised by the substantially cylindrical outer cylinder 24f fixed.

A portion surrounded by the upper plate 24c, the middle plate 24d, the supply pipe 5a and the outer cylinder 24f is the first header tank 24a, and is surrounded by the middle plate 24d, the lower plate 24e, the supply pipe 5a and the outer cylinder 24f. The portion is the second header tank 24b.

A feed hopper 13 is connected to an upper portion of the feed pipe 5a by a flange joint or the like.

A dispersing member 14 is provided at a central portion of the main body 2 located at the lower part of the header dunk 24.

The dispersing member 14 extends in the vertical direction throughout the main body 2 and has a lower end closed and an upper end opened by the inner cylindrical tube 14a and a conical portion 14b connected to the upper end of the inner cylindrical tube 14a. Configured The dispersion member 14 is connected to the lower portion of the supply pipe 5a via a plurality of support plates 14c.

Note that the same heat exchange medium as that flowing into the heat exchange pipe 21 may be flowed inside the dispersion member 14 and may be heated or cooled.

The heat exchange pipe 21 is comprised by the outer pipe | tube 21a and the inner pipe | tube 21b charged in the said outer pipe | tube 21a, as the structure is shown in detail in FIG. A sealing plate 21d is fixed to the lower end of the outer tube 21a, and a fixed guide 21e engaged with the opening of the mounting bracket 25 is fixed to the lower portion of the sealing plate 21d. One nipple 21f is fixed.

On the other hand, a ring-shaped buffer member 21c made of, for example, silicone rubber is attached to the inner pipe 21b at a plurality of locations including the lower end, thereby preventing the swing of the inner pipe 21b.
In particular, when a flexible hose made of polyvinyl chloride or the like is used for the inner pipe 21b, it is preferable to attach a relatively large number of buffer members 21c around the lower side.

The heat exchange pipe 21 is attached to the header tank 24 by the following method.
The middle plate 24d and the lower plate 24e are provided with a plurality of concentric through holes, and the through holes of the lower plate 24e are larger in diameter than the through holes of the middle plate 24d, and the through holes of the lower plate 24e Is threaded.
The inner pipe 21b is inserted and fixed to the L-shaped bracket 21h attached to the upper surface of the middle plate 24d by bolts, nuts, etc. by U-shaped bolts 21g etc. Ru.
The outer pipe 21a is inserted into the opening of the upper end (one nipple 21f), the lower end of the inner pipe 21b is lifted, and the single nipple 21f (male screw) in the through hole (female screw) of the lower plate 24e which is threaded Screw in).

In addition, the attachment to the lower plate 24e of the outer tube 21a may use a one-touch type joint connected by one-touch operation (not shown).
In this case, the one end of the one-touch joint having an external thread cut at one end is screwed into the through hole (female screw) of the lower plate 24e from below, and the socket portion of the other end of the one-touch joint By inserting the upper end, the outer pipe 21a can be easily fixed to the lower plate 24e.

The material to be treated (particulate matter) is fed from the feeding hopper 13 into the heat exchange vessel 1 and dispersed radially by the conical portion 14 b at the top of the dispersing member 14.
In this case, since the processed material (powder and granular material) does not pass through the upper portion of the header tank 24, the stagnation of the processed material does not occur in the upper portion of the header tank 24.
When the heat exchanger is relatively small, the heat exchange pipes 21 are concentrically attached at equal intervals and in multiple rows (2 to 3 rows) to the header tank 24. However, when the heat exchanger is large, they are staggered. It is preferable to attach in an array, since more heat exchange pipes 21 can be attached.
When the heat exchanger is large, it is preferable that not only one supply pipe 5 a be provided at the central portion of the header tank 24 but also at a plurality of places. Moreover, it is preferable to connect the dispersion member 14 to the lower part of each supply pipe 5a.

In addition, in the dispersion member 14, a protruding member 14 d may be provided on the surface of the inner cylindrical tube 14 a or the like (see FIG. 16) for promoting the movement of the powder particles in the horizontal direction.
The projecting member 14d extends outward and obliquely downward from the inner cylindrical tube 14a.
The projecting member 14d may have various shapes. For example, the lower end portion of a substantially columnar shape such as the first projecting member 14d1 and the first projecting member 14d1 having a substantially cylindrical shape may be obliquely lower toward the inner cylindrical portion 14a. The second projecting member 14d2 extends in the direction and contacts the inner cylindrical portion 14a, and has a substantially V-shaped second projecting member 14d2 viewed from the side, a third projecting member 14d3 having a substantially triangular pole shape pointed upward, and a substantially trapezoidal shape pointed upward A fourth projecting member 14d4 or the like may be considered.
The inclination angle (inclination angle λ of the projecting member) of the portion of the projecting member 14 d that extends obliquely downward from the inner cylindrical tube 14 a toward the outer direction is the repose angle ± 5 of the powder material processed by the heat exchange device. Preferably it is greater than

The projecting member 14d provided on the surface of the inner cylindrical tube 14a may be configured to include all four types (first to fourth projecting members 14d1 to 14d4), or any one type or two or more types may be included. It may be included.
Further, although the first projecting member 14d1 to the fourth projecting member 14d4 are exemplified as the projecting members 14d provided on the surface of the inner cylindrical tube 14a, the present invention is not limited to these, and other shapes may be adopted.

DESCRIPTION OF SYMBOLS 1 heat exchange container 2 main body 3 lid 4 cone-shaped part 5 processed material supply port 5a supply pipe 6 processed material discharge port 7 fixed quantity supply apparatus 8 fixed quantity discharge apparatus 9 load cell 11a 1st bellows type expansion pipe joint 11b 2nd bellows type expansion and contraction Pipe joint 13 Input hopper 14 Dispersion member 14a Inner cylinder 14b Conical portion 14c Support plate 14d Projection member 14d1 First projection member 14d2 Second projection member 14d3 Third projection member 14d4 Fourth projection member 20 Heat exchange portion 21 Heat exchange pipe 21a Outer tube 21b Inner tube 21c Buffering member 21d Sealing plate 21e Fixed guide 21f Fixed nipple 21g U-shaped bolt 21h L-shaped bracket 22a 1st straight pipe 22b 2nd straight pipe 22b1 2nd straight pipe fin 22c 3rd straight pipe 22c1 Three straight tube fins 22c2 tangent 24 header tank 24 First header tank 24b Second header tank 24c Upper plate 24d Middle plate 24e Lower plate 24f Outer cylinder 25 Mounting bracket 26a First piping 26b Second piping θ inclination angle of helix φ half apex angle of pyramidal portion inclination of projecting member angle

Claims (10)

A heat exchange container having a treated material supply port for supplying powdery particles from above and a treated material discharge port for discharging the powdery particles from below;
And a heat exchange unit provided inside the heat exchange container,
The heat exchange device for powder and granular materials, wherein the heat exchange part has a heat exchange pipe including an outer pipe constituted by a hollow torsion pipe extending in the vertical direction. The heat exchange device according to claim 1, wherein the heat exchange unit includes a plurality of the heat exchange pipes. The system further comprises a tank for supplying a heat exchange medium to the plurality of heat exchange pipes,
The heat exchange pipe includes an inner pipe charged into the outer pipe,
The tank is provided at one of the upper and lower portions of the heat exchange pipe,
The end of the outer tube on which the tank is provided is open and connected to the second tank, and the other end is closed,
Both ends of the inner pipe are open, and the end on the same side as the outer pipe is connected to the first tank, and the other end extends near the closed end of the outer pipe,
The heat exchange medium supplied from the first tank passes through the inside of the inner pipe, and is then returned to the second tank through the space between the outer pipe and the inner pipe. The heat exchange device according to Item 2. The tank is provided at the top of the heat exchange pipe,
At the lower part of the treated material supply port, a dispersing member for dispersing the powdery particles is provided.
The heat exchange device according to claim 3, wherein the tank is provided around a supply passage extending downward from the processing material supply port. The heat exchange device according to claim 4, wherein the dispersive member is provided with a projecting member extending outward and obliquely downward from the dispersive member. The heat exchange device according to claim 3, wherein at least an outer wall of the inner pipe is formed of a member having a thermal conductivity lower than that of the outer pipe. The heat exchange device according to claim 1, wherein the hollow twisted tube constituting the outer tube has a polygonal cross section or an elliptical cross section. The heat exchange device according to claim 7, wherein a protrusion is provided on an outer surface of a hollow torsion tube which constitutes the outer tube. The outer tube of the hollow torsion tube is configured by twisting a cylindrical object without shifting the central axis,
The cylindrically shaped object has a shape in which fins are provided at corner portions of a substantially rectangular horizontal cross section, and linearly extending in the vertical direction,
The heat exchange device according to claim 1, wherein the fin extends in a curved shape from the corner. The heat according to claim 1, wherein the inclination angle of the spiral formed on the surface of the torsion tube constituting the outer tube is larger than a value obtained by subtracting 5 degrees from the repose angle of the powder material. Exchange equipment.

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