JPWO2016194599A1 - Heat exchanger for powder - Google Patents

Abstract

Provided is a heat exchange device including a heat exchanger that can be easily matched to the size of a heat exchange vessel and the characteristics of a granular material to be treated. The heat exchanger for a granular material includes a heat exchange container 1 having a processed material supply port 5 for supplying the granular material from above and a processed material discharge port 6 for discharging the granular material from below. The heat exchange part 20 provided in the inside of the heat exchange container 1 is provided. The heat exchange unit 20 is a spiral tube extending in the vertical direction and having one or more first heat exchange pipes 21 provided with substantially spherical convex portions on a straight tube extending in the vertical direction, and the diameter of the spiral is constant. Two or more second heat exchange pipes composed of the above or two or more third heat exchange pipes composed of triangular wave-shaped tubes extending in the vertical direction.

Description

  The present invention relates to a heat exchanger for powder, and more particularly to a heat exchanger for heating or cooling a powder by conduction heat transfer (indirect heating) with a heat exchange medium.

  Conventionally, there existed a thing as described in patent documents as a heat exchanger of a granular material.

JP 2000-71285 A

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

  Therefore, the objective of this invention is providing the heat exchange apparatus containing the heat exchanger which is easy to match the magnitude | size of a heat exchange container, and the characteristic of the granular material of a process target.

  The heat exchanger for granular material according to the present invention includes a heat treatment container having a processed material supply port for supplying the granular material from above, and a processed material discharge port for discharging the granular material from below, and a heat exchange container. A heat exchanging part provided in the interior of the pipe, the heat exchanging part having at least one first heat exchanging pipe provided with a substantially spherical convex part on a straight pipe extending in the vertical direction and extending in the vertical direction. Two or more second heat exchange pipes that are formed in the shape of a spiral and have a constant spiral diameter, or two or more third heat exchange pipes that are constituted by triangular wave-shaped tubes extending in the vertical direction Have.

By providing the first heat exchange pipe, the second heat exchange pipe, or the third heat exchange pipe extending in the vertical direction in the heat exchange container, the convex portion, the spiral shape, and the triangular wave shape are maintained while maintaining the piston flow property of the granular material. Thus, a heat exchanger having a large heat transfer area can be formed.
When using one or more first heat exchange pipes with protrusions on the straight pipe as the heat exchange part, the first heat exchange pipe can be formed by squeezing the straight pipe, etc., so that it is partially tapered Compared to the form using a spiral heat exchange pipe including the spiral of the one, it easily matches the size of the heat exchange container and the characteristics of the granular material to be treated (particularly matched to the heat exchange container with a small diameter) A first heat exchange pipe) can be prepared.
When two or more second heat exchange pipes in which a spiral tube is formed so that a coil is wound around a cylindrical object are used as a heat exchange part, one spiral heat including a tapered spiral in part. Compared with the form using the exchange pipe, it is possible to easily prepare a heat exchange container that matches the size of the heat exchange container and the properties of the powder to be treated.
When using two or more third heat exchange pipes in which a triangular wave-shaped pipe is formed by bending a straight pipe in a zigzag shape, etc., as a heat exchange part, a spiral heat exchange pipe partially including a tapered spiral Compared to the embodiment using the above, it is possible to easily prepare a material that matches the size of the heat exchange container and the characteristics of the powder to be treated.
Moreover, in any case, by arranging a plurality of heat exchange pipes, the heat transfer area can be easily increased, and the lateral direction of the granular material can be increased by using the convex portion and the spiral inclination. The movement can be promoted, and uniform processing of the granular material becomes possible.

  Preferably, the heat exchange part has one or more first heat exchange pipes, and the maximum diameter of the convex part is 1.2 to 2 times the outer diameter of the straight pipe.

  Preferably, the heat exchange part has one or more first heat exchange pipes, and the inclination angle of the lower part of the convex part is larger than a value obtained by subtracting 5 degrees from the repose angle of the granular material.

  By making the inclination angle larger than the angle of repose of the granular material, it is difficult to create a gap between the lower part of the convex part and the granular material layer, and heat exchange can be performed efficiently using the entire heat exchange pipe. It becomes possible.

  Preferably, the heat exchange part has one or more first heat exchange pipes, and the inclination angle of the lower part of the convex part is 50 degrees or more.

  By setting the inclination angle to 50 degrees or more, it is difficult to form a gap between the lower part of the convex part and the granular material layer, and heat exchange can be efficiently performed using the entire heat exchange pipe.

  More preferably, the convex portion is a first arc shape formed so that an outer shape viewed from the side surface protrudes outward from the straight pipe side, and a lower portion of the first arc shape, and extends from the outside toward the straight pipe. The angle formed by the tangent line and the horizontal line at the inflection point where the first arc shape and the second arc shape are in contact with each other is the inclination angle.

  Preferably, the heat exchange part has two or more first heat exchange pipes, and the two or more heat exchange pipes have different vertical positions of the convex parts in adjacent heat exchange pipes. Be placed.

  Since the convex portions are provided and the vertical positions of the convex portions of the other heat exchange pipes are different, the lateral movement of the powder particles can be increased, and the powder particles can be uniformly processed.

  Preferably, the heat exchange section has two or more second heat exchange pipes, and the inclination angle of the spiral forming the spiral tube is less than the value obtained by subtracting 5 degrees from the repose angle of the granular material. Is also big.

  Preferably, the heat exchange part has two or more second heat exchange pipes, and the inclination angle of the spiral forming the spiral tube is 50 degrees or more.

  Preferably, the heat exchange section has two or more second heat exchange pipes, and the two or more heat exchange pipes are arranged on the circumference of one circle as viewed from above.

  More preferably, the two or more heat exchange pipes are arranged on the circumference of one circle as viewed from above and in a positional relationship such that they partially overlap with each other without contacting each other.

  A large number of second heat exchange pipes 31 can be arranged in a certain space (heat exchange vessel 1) to increase the heat transfer area of the second heat exchange pipes 31.

  Preferably, the heat exchanging unit includes a heat exchanging pipe group in which two or more second heat exchanging pipes are arranged on the circumference of one circle as viewed from above. A plurality of concentrically arranged rows are formed with other heat exchange pipe groups that are not included in the heat exchange pipe group or different from the heat exchange pipe group.

  Preferably, the heat exchange vessel is formed in a substantially conical shape with a narrow lower portion, and the conical half apex angle is 60 degrees or less.

  Preferably, the heat exchange section has two or more third heat exchange pipes, and the third heat exchange pipe is a hollow cylindrical tube formed in a triangular wave shape, and the top and bottom are straight tubes. And a corrugated portion provided between the connecting portions and formed of a triangular wave-shaped tube.

  More preferably, the triangular wave-shaped tube is formed so that triangular waves are aligned in the vertical direction when viewed from one horizontal direction and are substantially straight when viewed from another horizontal direction perpendicular to one horizontal direction.

  Compared to a spiral tube (second heat exchange pipe), there is an advantage that interference with adjacent heat exchange pipes is less likely to occur, and a plurality of heat exchange pipes are easily arranged.

  More preferably, the corrugated portion is formed by bending a straight pipe in a zigzag shape.

  Preferably, the inclination angle of the triangular wave-shaped tube is larger than a value obtained by subtracting 5 degrees from the repose angle of the granular material.

  Preferably, the inclination angle of the triangular wave-shaped tube is 50 degrees or more.

  Preferably, the two or more heat exchange pipes are arranged on the circumference of one circle as viewed from above.

  More preferably, the two or more heat exchange pipes are arranged on the circumference of one circle as viewed from above and in a positional relationship such that they partially overlap with each other without contacting each other.

  Preferably, the heat exchanging unit includes a heat exchanging pipe group in which two or more third heat exchanging pipes are arranged on the circumference of one circle as viewed from above. A plurality of concentrically arranged rows are formed with other heat exchange pipe groups that are not included in the heat exchange pipe group or different from the heat exchange pipe group.

  As described above, according to the present invention, it is possible to provide a heat exchange device including a heat exchanger that can easily match the size of the heat exchange container and the characteristics of the granular material to be processed.

It is a partially broken block diagram of the heat exchanger of the granular material in a 1st Example. It is a figure which shows the upper surface etc. of a heat exchange part in the AA line cross section of FIG. It is a figure which shows the horizontal cross section etc. of a heat exchange part in the BB line cross section of FIG. It is a figure which shows the longitudinal cross-section of a heat exchange part, etc. in the CC sectional view of FIG. It is a side view which shows the convex part of the 1st heat exchange pipe in a 1st Example. In a 1st Example, it is a side view which shows the positional relationship of a convex part and a space | gap in case an inclination angle is small. It is a partially broken block diagram of the heat exchanger of the granular material in a 2nd Example. It is a figure which shows the upper surface etc. of the 2nd heat exchange pipe in the DD line section of Drawing 7. It is a figure which shows the side surface etc. of the heat exchange part in 2nd Example (however, seeing from the front, illustration of five 2nd heat exchange pipes near this is abbreviate | omitted). It is a perspective view which shows the connection part (1st connection part) and spiral part of a 2nd heat exchange pipe in a 2nd Example. In a 2nd Example, it is a figure which shows the upper surface etc. of a 2nd heat exchange pipe in the form by which a plurality of heat exchange pipe groups are arranged in a concentric form, and a heat exchange part is formed. It is a figure which shows the side surface etc. of the heat exchange part of the form of FIG. 11 (however, seeing from the front, illustration of five 2nd heat exchange pipes near this is abbreviate | omitted). It is a partially broken block diagram of the heat exchanger of the granular material in a 3rd Example. It is a figure which shows the upper surface etc. of a 3rd heat exchange pipe in the EE sectional view of FIG. It is a figure which shows the side surface etc. of the heat exchange part in a 3rd Example. It is a perspective view which shows the specific example of the waveform part of the 3rd heat exchange pipe in a 3rd Example. In a 3rd Example, it is a figure which shows the upper surface etc. of a 3rd heat exchange pipe with the form by which the heat exchange part is formed by arranging a plurality of heat exchange pipe groups concentrically.

  Hereinafter, the present embodiment will be described with reference to the drawings.

  The heat exchanger for powder in this embodiment includes a heat exchange container 1, a constant supply device 7, a constant discharge device 8, a load cell 9, a first bellows-type expansion tube joint 11a, a second bellows-type expansion tube joint 11b, heat An exchange unit 20 is provided.

The heat exchange container 1 includes a cylindrical main body 2, an upper lid 3, and a conical portion 4 formed at the lower portion of the main body 2.
The lid 3 has a truncated cone shape (also referred to as a substantially truncated cone shape) having a narrow upper portion and a wide lower portion, and an upper end portion is opened as a processed product supply port 5.
The conical portion 4 has a truncated cone shape (also referred to as a substantially truncated cone shape) having a wide upper portion and a narrow lower portion, and the lower end portion opens as a processed product discharge port 6. The half apex angle φ of the conical portion 4 is preferably 60 degrees or less.

The fixed amount supply device 7 is a device for supplying a fixed amount of the processed material (powder particles) into the heat exchange container 1, and for example, a screw feeder is used.
The fixed amount discharge device 8 is a device that discharges the processed material from the heat exchange container 1 in a fixed amount, and for example, a rotary valve is used.

The load cell 9 is used for measuring the weight of the heat exchange container 1.
In order not to affect the weight measurement of the heat exchange container 1, the quantitative supply device 7 is connected to the processed product supply port 5 via the first bellows-type expansion tube joint 11 a, and the quantitative discharge device 8 is connected to the second discharge device 8. It is connected to the processed material discharge port 6 through a bellows type expansion tube joint 11b.

  The heat exchange unit 20 has a heat exchange pipe extending in the vertical direction, an upper header tank connected to the upper end of the heat exchange pipe, and a lower header tank connected to the lower end of the heat exchange pipe, A heat exchange medium flows inside, and the granular material in the heat exchange container 1 is heated or cooled by the heat exchange medium.

  Specifically, in the first embodiment to be described later, the heat exchange unit 20 includes one or more first heat exchange pipes 21 each having a substantially spherical convex portion 23 provided on a straight pipe 22 extending in the vertical direction. The first upper header tank 24 is connected to the upper end of the first heat exchange pipe 21, and the first lower header tank 25 is connected to the lower end of the first heat exchange pipe 21.

  In a second embodiment to be described later, the heat exchanging unit 20 includes two or more second heat exchange pipes 31 each having a spiral tube and a constant spiral diameter d. A second upper header tank 34 connected to the upper end of the heat exchange pipe 31 and a second lower header tank 35 connected to the lower end of the second heat exchange pipe 31 are provided.

  In a third embodiment to be described later, the heat exchange unit 20 includes two or more third heat exchange pipes 41 each formed of a triangular wave-shaped tube and a first heat pipe connected to the upper end of the third heat exchange pipe 41. A third upper header tank 44 and a third lower header tank 45 connected to the lower end of the third heat exchange pipe 41;

  In the case where the inner diameter of the main body 2 of the heat exchange container 1 is relatively large and only one processed product supply port 5 is provided in the lid 3, the heat exchange container 20 is inside the main body 2 or the lid 3. A dispersion device (not shown) such as a louver may be provided on the top of the substrate to disperse and drop the processed material.

  The heat exchange container 1 (the main body 2, the lid body 3, and the conical portion 4) has a jacket structure (not shown), and allows the same heat exchange medium to flow inside the first heat exchange pipe 21 to flow inside. preferable. Moreover, it may replace with the said jacket structure, the form which provides a heat retention apparatus or a cold insulation apparatus in the outer side of the heat exchange container 1, and the form which provides a heat insulation apparatus or a cold insulation apparatus in the outer side of the said jacket structure may be sufficient. .

  Next, a first embodiment will be described (see FIGS. 1 to 6).

  The first heat exchange pipe 21 in the first embodiment is a straight hollow cylindrical tube (straight tube 22) made of stainless steel (for example, SUS304), and a plurality of convex portions 23 protruding outward are constant in the vertical direction. These are provided at intervals.

  The convex portion 23 has a circular shape (concentric circle shape) centered on the same vertical axis in any horizontal cross section, has the longest diameter in the central portion, and has a shape in which the diameter is smoothly shortened in the vertical direction. And has a substantially spherical shape as a whole.

The shape of the convex portion 23 does not need to be vertically symmetric, but at least the inclination angle of the lower portion of the convex portion 23 (the angle formed between the inclined surface of the outer shape of the convex portion 23 and the horizontal plane) θ is processed by the heat exchange device. Angle of repose of the granular material (the bottom angle of the mountain formed by the granular material when the granular material is poured freely on a horizontal surface: JIS Industrial Glossary 5th Edition (Japanese Standards Association)) It is preferable to be larger than ± 5 degrees.
Moreover, although it changes also with the physical properties of the granular material to process, it is preferable that this inclination | tilt angle (theta) is 50 degrees or more.

  As in the first embodiment, the outer shape of the convex portion 23 when viewed from the side is located at the lower part of the first arc shape 23a and the first arc shape 23a, and one end is in contact with the first arc shape 23a. When the other end portion has the second arc shape 23b in contact with the straight pipe 22, the angle formed between the tangent and the horizontal line at the inflection point at which the first arc shape 23a and the second arc shape 23b are in contact with each other, The inclination angle θ is set (see FIG. 5).

The first arc shape 23 a is a part (arc) of the circle in which the center C 1 is located inside the first heat exchange pipe 21, and the second arc shape 23 b is the center C 2 outside the first heat exchange pipe 21. Is a part of the circle (arc).
In short, the first arc shape 23a is an arc formed so as to project outward from the straight pipe 22 side, and the second arc shape 23b projects from the outside toward the straight pipe 22 (from the straight pipe 22). It is an arc formed so as to be recessed toward the outside.

  Further, when the second arc shape 23b is not provided and there is no inflection point, specifically, when the first arc shape 23a and the straight pipe 22 are in direct contact with each other, the first arc shape 23a in the contacted portion is formed. In the case where the angle formed between the tangent line and the horizontal line is a linear shape instead of the second arc shape 23b, the angle formed between the straight line and the horizontal line is the inclination angle θ.

When the inclination angle θ is made larger than the angle of repose ± 5 degrees of the granular material or larger than 50 degrees, it is difficult to form a gap between the lower part of the convex portion 23 and the granular material layer, and the first heat Heat exchange can be performed efficiently using the entire exchange pipe 21.
When the inclination angle θ is small, as shown in FIG. 6, an air gap a is formed between the lower part of the convex portion 23 and the granular material layer, and the efficiency with the heat exchange medium flowing in the first heat exchange pipe 21. Good heat exchange is less likely to occur.

  The convex portion 23 is preferably formed by a cold forging method called swaging, in which a divided mold is rotated and the outer diameter of the pipe material is reduced while hitting.

The first heat exchange pipe 21 may be configured by one, but may be configured by two or more.
When configured with two or more, the plurality of first heat exchange pipes 21 are arranged at equal intervals, and as shown in FIGS. 2 and 3, the three first heat exchange pipes 21 are viewed from above. It is preferably arranged at the position of the vertex of the equilateral triangle.

  The first heat exchange pipe 21 is preferably formed such that the maximum diameter of the convex portion 23 is 1.2 to 2 times the outer diameter of the straight pipe 22.

The adjacent first heat exchange pipes 21 are preferably as close as possible, and the interval x on the horizontal projection plane between the convex portions 23 of the adjacent first heat exchange pipes 21 is 1/3 or less of the maximum diameter of the convex portions 23. Preferably there is. Specifically, in the case of the first heat exchange pipe 21 in which the outer diameter of the straight pipe 22 is 35 mm and the maximum diameter of the convex portion 23 is 60 mm, the interval x between the adjacent first heat exchange pipes 21 is 20 mm or less. Is preferred (see FIG. 3).
When this interval x becomes longer, the amount of movement in the lateral direction of the processed material moving from top to bottom decreases in the portion where the first heat exchange pipe 21 is present, and the degree of mixing of the processed materials decreases, so that all processing is performed. An object cannot uniformly contact the first heat exchange pipe 21, and it becomes difficult to uniformly heat or cool the object.

  Moreover, as shown in FIG. 4, it is preferable that each 1st heat exchange pipe 21 is formed and arrange | positioned so that the vertical position of the convex part 23 in the adjacent 1st heat exchange pipe 21 may differ.

  Specifically, with respect to the three first heat exchange pipes 21 arranged on a straight line in the horizontal direction, between the upper and lower two convex portions 23 of the intermediate first heat exchange pipe 21, the upper convex portion The convex part 23 of the 1st heat exchange pipe 21 adjacent to one side is arrange | positioned in the position near 23, and the convex part 23 of the 1st heat exchange pipe 21 adjacent to the other side is arrange | positioned in the position close to the lower convex part 23. As described above, it is preferable that each first heat exchange pipe 21 is formed and arranged.

  The three first heat exchange pipes 21 arranged in a straight line in the horizontal direction are on a straight line connected to the same first upper header tank 24 and first lower header tank 25 shown below. The arrangement is not limited to the arrangement of the three first heat exchange pipes 21, and the three first heat exchange pipes 21 arranged on other horizontal straight lines connected to different first upper header tanks 24 and first lower header tanks 25 are arranged. The same applies to the arrangement of the one heat exchange pipe 21.

  A plurality of first heat exchange pipes 21 arranged on a straight line in the horizontal direction are respectively connected to one first upper header tank 24 and first lower header tank 25 (see FIGS. 2 to 4).

  The first upper header tank 24 and the first lower header tank 25 are straight pipes whose vertical cross section has an oval shape (vertically long oval shape).

  In order to prevent the processed products on the upper surfaces of the first upper header tank 24 and the first lower header tank 25 from staying, the direction of the long diameter is arranged vertically so as to be vertically long. Note that the upper surfaces of the first upper header tank 24 and the first lower header tank 25 may be formed in a triangular shape with a sharp upper portion.

  The first upper pipe 26 is connected to one end of the first upper header tank 24, and the other end is closed. A first lower pipe 27 is connected to one end of the first lower header tank 25, and the other end is closed.

When a liquid (cold water, hot water, heat transfer oil, etc.) is used for the heat exchange medium, the first lower pipe 27 is used as a heat exchange medium supply pipe, and the first upper pipe 26 is used as a heat exchange medium discharge pipe. The
When a gas such as water vapor is used as the heat exchange medium, the first upper pipe 26 is used as a heat exchange medium supply pipe, and the first lower pipe 27 is used as a heat exchange medium discharge pipe.
The heat exchange medium supply pipe (the first upper pipe 26 or the first lower pipe 27) communicates with a heat exchange medium source (not shown).

By providing the first heat exchange pipe 21 extending in the vertical direction in the heat exchange container 1, while maintaining the piston flow property of the granular material, compared to the heat exchange pipe constituted by the straight pipe 22 by the convex portion 23. Thus, a heat exchanger having a large heat transfer area can be formed.
Since the 1st heat exchange pipe 21 can be formed by restricting a straight pipe etc., compared with the form using a spiral heat exchange pipe which includes a taper-like spiral in a part like patent documents 1 easily In addition, it is possible to prepare a pipe that matches the size of the heat exchange container 1 and the characteristics of the granular material to be treated (particularly, the first heat exchange pipe 21 adapted to the heat exchange container 1 having a small diameter).
In addition, by arranging a plurality of first heat exchange pipes 21, the heat transfer area can be easily increased, and the inclination of the convex portion 23 can be used to promote the lateral movement of the powder particles. , Uniform processing of powder particles becomes possible.

  Next, a second embodiment will be described (see FIGS. 7 to 12).

  The second heat exchange pipe 31 in the second embodiment is formed by spirally winding a hollow cylindrical tube made of stainless steel (for example, SUS304). A spiral portion 33 that is provided between the first connection portions 32 and is formed of a spiral tube.

  The spiral tube (spiral portion 33) of the second heat exchange pipe 31 is formed such that a coil is wound at equal intervals around a fictitious cylindrical object having a constant spiral diameter d and extending in the vertical direction.

  The second heat exchange pipe 31 is preferably formed in a smooth curved shape, but a straight pipe may be bent little by little so as to have a shape close to a substantially spiral pipe.

The inclination angle (lead angle) θ of the spiral forming the spiral tube (spiral portion 33) of the second heat exchange pipe 31 is the repose angle ± of the granular material to be processed, as in the first embodiment. It is preferable to be larger than 5 degrees.
Further, the inclination angle θ is preferably 50 degrees or more, although it varies depending on the physical properties of the granular material to be treated.

When the inclination angle θ is made larger than the angle of repose ± 5 degrees of the granular material or larger than 50 degrees, the spiral of the second heat exchange pipe 31 forming the helical tube (helical portion 33) is formed. It is difficult to form a gap between the lower part and the granular material layer, and heat exchange can be efficiently performed using the entire second heat exchange pipe 31.
When the inclination angle θ is small, as in the case of the first embodiment, between the lower part of the spiral forming the spiral tube (spiral portion 33) of the second heat exchange pipe 31 and the granular material layer. An air gap a is formed, and it is difficult for efficient heat exchange with the heat exchange medium flowing in the second heat exchange pipe 31.

  As shown in FIG. 8, the plurality of second heat exchange pipes 31 are positioned at an equal distance from the center of the main body 2 of the heat exchange vessel 1 as viewed from above, that is, on the circumference of one circle (concentric circles). Are arranged at equal intervals.

  Further, as shown in FIG. 8, the second heat exchange pipes 31 arranged on the circumference of one circle as viewed from above and adjacent to each other do not touch each other and partially overlap as viewed from above. Arranged so as to be in a positional relationship.

  A large number of second heat exchange pipes 31 can be arranged in a certain space (heat exchange vessel 1) to increase the heat transfer area of the second heat exchange pipes 31.

  However, the form arrange | positioned so that the adjacent 2nd heat exchange pipe 31 may become the positional relationship which a part does not overlap seeing from upper direction may be sufficient.

  The spiral diameter d (circular diameter viewed in the horizontal section) forming the spiral tube (spiral portion 33) of the second heat exchange pipe 31 is preferably as small as possible. When the diameter of the tube is 25.4 mm, the diameter d of the spiral can be 100 to 300 mm.

  As shown in FIGS. 8 and 9, a plurality of second heat exchange pipes 31 arranged on the circumference of one circle are respectively connected to one second upper header tank 34 via the first connection portion 32. The second lower header tank 35 is connected.

  The second upper header tank 34 and the second lower header tank 35 are circular pipes whose vertical cross section has an oval shape (vertically long oval shape).

  In order to prevent the processed products on the upper surfaces of the second upper header tank 34 and the second lower header tank 35 from staying, the direction of the long diameter is arranged vertically. Note that the upper surfaces of the second upper header tank 34 and the second lower header tank 35 may be formed in a triangular shape with a sharp upper portion.

  A second upper pipe 36 is connected to a part of the side surface of the second upper header tank 34, and a second lower pipe 37 is connected to a part of the side surface of the second lower header tank 35.

When a liquid (cold water, hot water, heat transfer oil, etc.) is used as the heat exchange medium, the second lower pipe 37 is used as a heat exchange medium supply pipe, and the second upper pipe 36 is used as a heat exchange medium discharge pipe. The
When a gas such as water vapor is used as the heat exchange medium, the second upper pipe 36 is used as a heat exchange medium supply pipe, and the second lower pipe 37 is used as a heat exchange medium discharge pipe.
The heat exchange medium supply pipe (second upper pipe 36 or second lower pipe 37) communicates with a heat exchange medium source (not shown).

By providing the second heat exchange pipe 31 extending in the vertical direction in the heat exchange vessel 1, it is possible to form a heat exchanger having a large heat transfer area with a spiral shape while maintaining the piston flow property of the granular material. I can do it.
Since the spiral tube (the spiral portion 33 of the second heat exchange pipe 31) is formed so that the coil is wound around the cylindrical object, one spiral including a tapered spiral as part of Patent Document 1 is formed. Compared with the form using a heat-exchange pipe in the form of a tube, it is possible to easily prepare one that matches the size of the heat exchange container and the characteristics of the granular material to be treated.
Moreover, by arranging a plurality of second heat exchange pipes 31, it is possible to easily increase the heat transfer area, and using a spiral inclined surface, it is possible to promote the lateral movement of the granular material, Uniform processing of powder and granular materials becomes possible.

  In addition, although it changes with the internal diameter of the main body 2 of the heat exchange container 1, and the diameter of the helix which forms the helical pipe | tube (helical part 33) of the 2nd heat exchange pipe 31, the heat exchange part 20 is 1 A heat exchange pipe group in which two or more second heat exchange pipes 31 are arranged on the circumference of two circles is one second heat exchange pipe 31 that is not included in the heat exchange pipe group described above Alternatively, it is preferably formed by arranging two or more rows concentrically with another heat exchange pipe group (different from the above heat exchange pipe group) (see FIGS. 11 and 12).

  11 and 12 show a heat exchange pipe group in which twelve second heat exchange pipes 31 are arranged on one circumference, and four second heat exchange pipes 31 on one inside. The example of the heat exchange part 20 in which another heat exchange pipe group arrange | positioned above was arranged in a concentric form is shown.

  Here, the inner second heat exchange pipe 31 and the outer second heat exchange pipe 31 may be disposed so as not to contact each other and partially overlap each other when viewed from above. 11, they may be arranged so as to have a positional relationship that does not overlap each other when viewed from above.

  Next, a third embodiment will be described (see FIGS. 13 to 17).

  The third heat exchange pipe 41 in the third embodiment is a stainless steel (for example, SUS304) hollow cylindrical tube formed in a triangular wave shape, and a second connection portion 42 that is configured by a straight pipe at the top and bottom. And a corrugated portion 43 formed of a triangular wave tube provided between the upper and lower second connecting portions 42.

The triangular wave-shaped tube (corrugated portion 43) of the third heat exchange pipe 41 has triangular waves arranged in the vertical direction when viewed from one horizontal direction, and is substantially viewed from another horizontal direction perpendicular to the one horizontal direction. It is formed to be a straight line.
For this reason, compared with a helical pipe | tube (2nd heat exchange pipe 31), there exists an advantage which interference with an adjacent heat exchange pipe does not occur easily and it is easy to arrange | position a several heat exchange pipe.

  The corrugated portion 43 of the third heat exchange pipe 41 has a form in which a straight pipe is formed in a zigzag shape at the same angle alternately at the left and right at regular intervals, and the corner portion of the zigzag is bent into a gentle curve. As shown in FIG. 16, the linear tube 43a and the L-shaped tube 43b may be connected to each other.

The inclination angle θ of the triangular wave-shaped tube (corrugated portion 43) of the third heat exchange pipe 41 is the repose angle ± 5 degrees of the granular material to be processed, as in the first and second embodiments. Is preferably larger.
Further, the inclination angle θ is preferably 50 degrees or more, although it varies depending on the physical properties of the powder to be processed.

When the inclination angle θ is made larger than the angle of repose of the granular material ± 5 degrees or larger than 50 degrees, it is inclined to form a triangular wave-shaped tube (corrugated portion 43) of the third heat exchange pipe 41. It is difficult to form a gap between the lower part of the tube and the granular material layer, and it is possible to efficiently perform heat exchange using the entire third heat exchange pipe 41.
When the inclination angle θ is small, as in the case of the first embodiment or the second embodiment, the inclined tube and powder particles forming the triangular wave-shaped tube (corrugated portion 43) of the third heat exchange pipe 41 An air gap is formed between the body layer and the heat exchange with the heat exchange medium flowing through the third heat exchange pipe 41 is difficult to be performed.

  As shown in FIG. 14, the plurality of third heat exchange pipes 41 are positioned at an equal distance from the center of the main body 2 of the heat exchange vessel 1 as viewed from above, that is, on the circumference of one circle (concentric circles). Are arranged at equal intervals.

  Further, as shown in FIG. 14, the third heat exchange pipes 41 arranged on the circumference of one circle as viewed from above and adjacent to each other do not touch each other and partially overlap as viewed from above. Arranged so as to be in a positional relationship.

  Many third heat exchange pipes 41 can be arranged in a certain space (heat exchange vessel 1), and the heat transfer area by the third heat exchange pipe 41 can be increased.

However, the form arrange | positioned so that the said adjacent 3rd heat exchange pipe 41 may become the positional relationship which a part does not overlap seeing from upper direction may be sufficient.
For example, the direction of the substantially straight line when viewed from above the third heat exchange pipe 41 is in a positional relationship orthogonal to the circumference of one circle when viewed from above (the substantially straight line is radial when viewed from above). Each of the third heat exchange pipes 41 may be disposed so that the third heat exchange pipe 41 is located.

As shown in FIGS. 14 and 15, a plurality of third heat exchange pipes 41 arranged on the circumference of one circle are respectively connected to one third upper header tank 44 via the second connection portion 42. It is connected to the third lower header tank 45.
However, the arrangement of the third heat exchange pipes 41 is not limited to the form arranged on the circumference. For example, as in the first embodiment, the third heat exchange pipes are arranged on a straight line in the horizontal direction. 41 may be arranged.
In this case, the direction of the substantially straight line when viewed from above the third heat exchange pipe 41 is a positional relationship orthogonal to the straight line in the horizontal direction or a positional relationship having a certain angle (the substantially straight line is Each of the third heat exchange pipes 41 is arranged so that they are arranged in parallel.

  The third upper header tank 44 and the third lower header tank 45 are circular pipes whose vertical cross section has an oval shape (vertically long oval shape).

  In order to prevent the processed products on the upper surfaces of the third upper header tank 44 and the third lower header tank 45 from staying, the direction of the long diameter is arranged in the vertical direction. Note that the upper surfaces of the third upper header tank 44 and the third lower header tank 45 may be formed in a triangular shape with a sharp upper portion.

  A third upper pipe 46 is connected to a part of the side surface of the third upper header tank 44, and a third lower pipe 47 is connected to a part of the side surface of the third lower header tank 45.

When a liquid (cold water, hot water, heat transfer oil, etc.) is used as the heat exchange medium, the third lower pipe 47 is used as a heat exchange medium supply pipe, and the third upper pipe 46 is used as a heat exchange medium discharge pipe. The
When a gas such as water vapor is used as the heat exchange medium, the third upper pipe 46 is used as a heat exchange medium supply pipe, and the third lower pipe 47 is used as a heat exchange medium discharge pipe.
The heat exchange medium supply pipe (the third upper pipe 46 or the third lower pipe 47) communicates with a heat exchange medium source (not shown).

By providing the third heat exchange pipe 41 extending in the vertical direction in the heat exchange vessel 1, it is possible to form a heat exchanger having a large heat transfer area with a triangular wave shape while maintaining the piston flow property of the granular material. I can do it.
Since it is possible to form a triangular wave-shaped tube (third heat exchange pipe 41) by bending a straight tube in a zigzag shape, a spiral heat exchange including a tapered spiral in part as in Patent Document 1. Compared to the configuration using a pipe, it easily matches the size of the heat exchange container 1 and the characteristics of the powder to be treated (particularly, the third heat exchange pipe 41 adapted to the heat exchange container 1 having a small diameter). Can be prepared.
In addition, by arranging a plurality of third heat exchange pipes 41, the heat transfer area can be easily increased, and the movement of the powder particles in the lateral direction can be promoted using a triangular wave-shaped inclined surface. , Uniform processing of powder particles becomes possible.

  The heat exchanging unit 20 includes a heat exchanging pipe group in which two or more third heat exchanging pipes 41 are arranged on the circumference of one circle as viewed from above. It is not included in the aforementioned heat exchange pipe group, or is formed by arranging two or more rows concentrically with another heat exchange pipe group (different from the aforementioned heat exchange pipe group). Preferred (see FIG. 17).

  FIG. 17 shows a heat exchange pipe group in which 16 third heat exchange pipes 41 are arranged on one circumference, and eight third heat exchange pipes 41 are arranged on one circumference inside the heat exchange pipe group. The example of the heat exchange part 20 in which the another heat exchange pipe group made is arranged in a concentric form is shown.

  Here, the inner third heat exchange pipe 41 and the outer third heat exchange pipe 41 may be arranged so as not to contact each other and to partially overlap each other when viewed from above. As shown in FIG. 17, they may be arranged so as to have a positional relationship that does not overlap each other when viewed from above.

Further, in order to reduce the number of particles that do not contact the second heat exchange pipe 31 or the third heat exchange pipe 41, a line passing through the center of the main body 2 (the vertical connecting the treatment product supply port 5 and the treatment product discharge port 6). A hollow cylindrical core having a closed upper end and a lower end extending in the vertical direction is provided at a place where the second heat exchange pipe 31 or the third heat exchange pipe 41 does not pass, such as on the line), and the core is provided. The form which prevents a granular material from passing through a part may be sufficient.
Furthermore, the form which lets a heat exchange medium pass also into the inside of the said core may be sufficient.

  Next, a method for cooling a granular material using the heat exchanger for granular material of the present invention (the heat exchange device shown in the first embodiment) will be described.

  In a state where the quantitative discharge device 8 is stopped, the operator uses a pump (not shown) or the like to supply cooling water having a constant temperature from the heat exchange medium source through the heat exchange medium supply pipe (first lower pipe 27). A fixed amount is supplied to the heat exchange unit 20.

  The cooling water supplied to the heat exchange unit 20 enters each first heat exchange pipe 21 from the heat exchange medium supply pipe (first lower pipe 27) via the first lower header tank 25, and then the first upper header tank. 24. Return to the heat exchange medium source via the heat exchange medium discharge pipe (first upper pipe 26), and cool again to a constant temperature.

  Next, the operator activates the quantitative supply device 7 to continuously supply the processed material (raw material, granular material) into the heat exchange container 1.

  The weight of the processed material in the heat exchange container 1 is continuously measured by the load cell 9, and when the predetermined weight is reached, the operator activates the quantitative discharge device 8 and continuously supplies the processed material from the heat exchange container 1. Let it drain.

  The operator controls the rotation speed of the quantitative discharge device 8 so that the weight of the processed material in the heat exchange container 1 is constant.

  In addition, the temperature of the processed object is continuously measured by a thermometer (not shown) installed in the cone-shaped part 4 located below the heat exchanging part 20, and the operator determines the processed object based on the measurement result. Perform temperature control.

  Even after the processed product in the fixed amount supply device 7 is exhausted or after the fixed amount supply device 7 is stopped and the supply of the processed product into the heat exchange container 1 is finished, the cooling processing of the processed product is continued.

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

DESCRIPTION OF SYMBOLS 1 Heat exchange container 2 Main body 3 Cover body 4 Conical part 5 Processed object supply port 6 Processed object discharge port 7 Fixed amount supply apparatus 8 Fixed amount discharge apparatus 9 Load cell 11a 1st bellows-type expansion-pipe joint 11b 2nd bellows-type expansion-pipe joint 20 Heat Exchanger 21 First Heat Exchange Pipe 22 Straight Pipe 23 Convex 23a First Arc Shape 23b Second Arc Shape 24 First Upper Header Tank 25 Second Lower Header Tank 26 First Upper Pipe 27 First Lower Pipe 31 Second Heat exchange pipe 32 First connection part 33 Spiral part 34 Second upper header tank 35 Second lower header tank 36 Second upper pipe 37 Second lower pipe 41 Third heat exchange pipe 42 Second connection part 43 Waveform part 43a Linear No. 43b L-shaped pipe 44 Third upper header tank 45 Third lower header tank 46 Third upper pipe 47 Third lower pipe The center of the circle arcs of the center C2 second arc shape of a circle arc of the gap C1 first arcuate forms part forms part

Claims (20)

A heat exchange container having a processed material supply port for supplying the granular material from above, and a processed material discharge port for discharging the granular material from below;
A heat exchange section provided inside the heat exchange container,
The heat exchange part is a spiral pipe extending in the vertical direction and having one or more first heat exchange pipes provided with a substantially spherical convex part on a straight pipe extending in the vertical direction, and the diameter of the spiral is constant. Having two or more second heat exchange pipes made of a material, or having two or more third heat exchange pipes made of a triangular wave-shaped tube extending in the vertical direction apparatus. The heat exchanging section has one or more first heat exchanging pipes,
2. The heat exchange device according to claim 1, wherein a maximum diameter of the convex portion is 1.2 to 2 times an outer diameter of the straight pipe. The heat exchanging section has one or more first heat exchanging pipes,
2. The heat exchange device according to claim 1, wherein an inclination angle of a lower portion of the convex portion is larger than a value obtained by subtracting 5 degrees from an angle of repose of the granular material. The heat exchanging section has one or more first heat exchanging pipes,
The heat exchange device according to claim 1, wherein an inclination angle of the lower portion of the convex portion is 50 degrees or more. The convex portions are a first arc shape formed so that an outer shape seen from a side surface protrudes outward from the straight pipe side, and a lower portion of the first arc shape, and extends from the outside toward the straight pipe. A second arc shape formed so as to protrude,
5. The heat exchange device according to claim 3, wherein an angle formed between a tangent to an inflection point where the first arc shape and the second arc shape are in contact with a horizontal line is the inclination angle. . The heat exchange part has two or more first heat exchange pipes,
The heat exchange apparatus according to claim 1, wherein the two or more heat exchange pipes are arranged so that the vertical positions of the convex portions in adjacent heat exchange pipes are different. The heat exchange part has two or more second heat exchange pipes,
The heat exchange apparatus according to claim 1, wherein an inclination angle of a spiral forming the spiral tube is larger than a value obtained by subtracting 5 degrees from an angle of repose of the granular material. The heat exchange part has two or more second heat exchange pipes,
The heat exchange apparatus according to claim 1, wherein an inclination angle of a spiral forming the spiral tube is 50 degrees or more. The heat exchange part has two or more second heat exchange pipes,
The heat exchange apparatus according to claim 1, wherein the two or more heat exchange pipes are arranged on a circumference of one circle as viewed from above.   The two or more heat exchange pipes are arranged on a circumference of one circle as viewed from above and in a positional relationship such that the two or more heat exchange pipes overlap each other when viewed from above without contacting each other. 9. The heat exchange device according to 9.   In the heat exchange part, a heat exchange pipe group in which two or more second heat exchange pipes are arranged on the circumference of one circle when viewed from above is one second heat exchange pipe. 2. The heat according to claim 1, wherein the heat exchange pipe group is formed by being arranged in a plurality of concentric circles with a heat exchange pipe group that is not included in the heat exchange pipe group or different from the heat exchange pipe group. Exchange equipment.   2. The heat exchange device according to claim 1, wherein the heat exchange container is formed in a substantially conical shape with a narrow lower portion, and the half apex angle of the conical shape is 60 degrees or less. The heat exchange part has two or more third heat exchange pipes,
The third heat exchange pipe is a hollow cylindrical tube formed in a triangular wave shape, and is formed of a triangular wave tube that is provided between the connecting portion and the connecting portion, each of which is formed of a straight pipe on the upper and lower sides. The heat exchange device according to claim 1, further comprising a corrugated portion.   The triangular wave-shaped tube is formed so that triangular waves are arranged in a vertical direction when viewed from one horizontal direction, and are substantially straight lines when viewed from another horizontal direction perpendicular to the one horizontal direction. The heat exchange device according to claim 13.   The heat exchange apparatus according to claim 14, wherein the corrugated portion is formed by bending a straight pipe in a zigzag shape.   The heat exchange apparatus according to claim 14, wherein an inclination angle of the triangular wave-shaped tube is larger than a value obtained by subtracting 5 degrees from an angle of repose of the granular material.   The heat exchange apparatus according to claim 14, wherein an inclination angle of the triangular wave-shaped tube is 50 degrees or more.   The heat exchange apparatus according to claim 14, wherein the two or more heat exchange pipes are arranged on a circumference of one circle as viewed from above.   The two or more heat exchange pipes are arranged on a circumference of one circle as viewed from above and in a positional relationship such that the two or more heat exchange pipes overlap each other when viewed from above without contacting each other. The heat exchange apparatus according to 18. In the heat exchange part, a heat exchange pipe group in which two or more third heat exchange pipes are arranged on the circumference of one circle as viewed from above is one third heat exchange pipe. The heat according to claim 14, wherein the heat exchange pipe group is formed by being arranged in a plurality of concentric circles with another heat exchange pipe group that is not included in the heat exchange pipe group or different from the heat exchange pipe group. Exchange device.

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