JP2006090641A - Heat exchanger and carbon black production system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel heat exchanger and a carbon black production system using the heat exchanger capable of effectively preventing buckling of a heat exchanger tube. <P>SOLUTION: The heat exchanger has an outer cylinder; a large number of heat exchanger tubes arranged inside the outer cylinder, with the longitudinal direction placed in the axial direction of the outer cylinder; an upper tube plate provided at the upper part of the outer cylinder to close the upper part of the outer cylinder while holding the upper end side of the large number of heat exchanger tubes; a lower tube plate provided at the lower part of the outer cylinder to close the lower part of the outer cylinder while holding the lower end side of the large number of heat exchanger tubes; a baffle plate group composed of a plurality of baffle plates BF disposed between the upper tube plate and the lower tube plate, with each baffle plate pierced with a plurality of heat exchanger tubes to regulate the heat exchanger tubes and to allow gas flowing in the outer cylinder, to meander; and a holding means for holding each baffle plate of the baffle plate group in the outer cylinder in the predetermined position relation in the axial direction of the outer cylinder. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat exchange device and a carbon black production system.

  A heat exchanger that places a large number of heat transfer tubes inside the outer cylinder, distributes high-temperature gas through the heat transfer tubes, distributes gas inside the outer cylinder, and heats the gas by heat exchange with the high-temperature gas Is widely implemented in various fields of industry. A carbon black production system using such a heat exchange device is also known (patent information 1).

  For example, in a heat exchange device used in a carbon black production system, the high-temperature gas circulated through the heat transfer tube is a “decomposition product gas that exits the reaction furnace and travels toward the collection unit”, and a large amount of gas generated in the reaction furnace. The carbon black fine particles are included, and the temperature is generally about 1000 ° C., and the air heated by heat exchange is heated to about 800 ° C. For this reason, the temperature of the heat transfer tube is about 900 ° C.

  In the case of such a heat exchange device that exchanges heat with respect to a high-temperature gas, in order to increase the “contact area with the outer wall of the heat transfer tube” of the gas that exchanges heat with the high-temperature gas, the inner diameter: 20 A large number of thin heat transfer tubes of about 200 mm are used, and a high-temperature gas is divided and circulated through these many heat transfer tubes. The length of the heat transfer tube is also set to about 7 to 15 m.

  Thus, the heat transfer tube is thin and long, and both ends are mechanically fixed. When the temperature of the heat transfer tube in such a state becomes a high temperature of about 900 ° C., the mechanical strength of the heat transfer tube is lowered and “buckling” is likely to occur.

For example, the upstream side (usually the lower end side) of the heat transfer tube is welded and fixed to the lower tube plate via a collar, and the downstream side (usually the upper end side) is connected to the upper pipe via a “expandable tube (bellows)”. It is fixed to the plate by welding. In some cases, the heat transfer tube has an upper end on the upstream side and a lower end on the downstream side.In this case, the upper end side is welded and fixed to the upper tube plate via a collar, and the lower end side is connected to an expansion tube (bellows). And welded to the lower tube sheet.
When the heat transfer tube buckles, the upper end of the heat transfer tube is displaced downward due to bending due to buckling. The amount of buckling of the heat transfer tube increases with time of use of the heat exchanger, and if the amount of buckling of the heat transfer tube increases with time and exceeds a certain limit, the expansion tube breaks. Or the expansion / contraction function may be impaired, and further, the heat transfer tube may be damaged, or the weld fixing portion with the upper tube sheet may be broken. Such a state is a “dangerous state in which high-temperature gas and air are mixed and may cause a fire due to secondary combustion”, and is determined as the life of the heat exchange device.

  For example, in the case of a heat exchange device used in a carbon black production system, the life of the heat exchange device is in the range of 4 to 10 years, depending on the operating state of the system, and on average is 6 to 7 years. It is known that the main factor to be determined is “deformation / breakage of heat transfer tube and breakage of expansion tube due to buckling of heat transfer tube”. Therefore, if the buckling of the heat transfer tube can be prevented, it is considered that the life of the heat exchanger can be effectively extended.

JP 2004-138362 A

  This invention makes it a subject to implement | achieve the novel heat exchange apparatus which can prevent the buckling of a heat exchanger tube effectively, and a carbon black production system using the same.

  The heat exchanging device according to the present invention (Claim 1) is arranged such that “a plurality of heat transfer tubes are arranged inside the outer cylinder, a high temperature gas is circulated through the heat transfer tube, and a gas is circulated inside the outer cylinder. A heat exchange device that heats and raises the temperature of the gas by heat exchange, and includes an outer cylinder, an upper tube sheet, a lower tube sheet, a baffle plate group, and a holding means.

In the “outer cylinder”, a gas to be heated and heated is circulated inside.
A large number of “heat transfer tubes” are arranged inside the outer cylinder, with the longitudinal direction being the cylinder axis direction of the outer cylinder. The “multiple” is the number of about 10 to several hundreds. The diameter of the heat transfer tube is preferably, for example, an inner diameter of about 20 mm to 200 mm and an outer diameter of about 25 mm to 210 mm, and the material is preferably stainless steel having excellent heat resistance and excellent mechanical strength. That is, conventionally known tubes can be used as appropriate for the multiple heat transfer tubes.

The “upper tube sheet” is provided at the upper part of the outer cylinder, holds the upper end side of a large number of heat transfer tubes, and closes the upper part of the outer cylinder.
The “lower tube sheet” is provided at the lower part of the outer cylinder, holds the lower end side of a large number of heat transfer tubes, and closes the lower part of the outer cylinder.

  The “baffle plate group” is composed of a plurality of baffle plates disposed between an upper tube plate and a lower tube plate, and each baffle plate is penetrated by a plurality of heat transfer tubes to form a space between the heat transfer tubes. Regulates and causes the gas flowing inside the outer cylinder to meander.

  The number of baffle plates constituting the baffle plate group is determined by design conditions, but may be the same as that used in conventionally known heat exchange devices. For example, if the heat exchange device used in the “carbon black production system” is “the length of the outer cylinder is 14.5 m”, “the ratio of about one piece in 40 cm to 150 cm” in the cylinder axis direction of the outer cylinder. It is a guideline to provide in. As the material of the baffle plate, an appropriate material conventionally used such as stainless steel can be used. Of course, it is necessary to have strength that can antagonize the deformation force due to buckling of the heat transfer tube.

The “holding means” is means for holding individual baffle plates of the baffle plate group in the outer cylinder in a predetermined positional relationship in the cylinder axis direction of the outer cylinder.
And "at least the baffle plate that is arranged in the region where the heat transfer tube is likely to buckle" rotates around the cylinder axis of the outer cylinder (the buckling of the heat transfer tube is in the radial direction of the outer cylinder) The baffle plate is disposed in the outer cylinder and “at least in the region where buckling is likely to occur” to prevent the occurrence of rotation along the inner peripheral surface of the outer cylinder. Are individually engaged with each of the baffle plates.

  That is, all the baffle plates arranged in the outer cylinder may be individually “engaged with the outer cylinder at the engaging portion”, but it is necessary to engage all the baffle plates with the outer cylinder in this way. It is not always necessary to engage only the minimum necessary number of baffle plates in which the heat transfer tube is likely to buckle.

  For example, when the length of the outer cylinder is about 14.5 m and the outer diameter of the heat transfer tube is about 90 mm, buckling is likely to occur “below the central portion in the tube longitudinal direction. It is known from experience that the range is 3 to 5 m. In such a case, if the baffle plates are provided at “approximately 70 cm intervals” in the axial direction of the outer cylinder, the total number of the baffle plates arranged in the outer cylinder is about 20, Since there are about 4 to 7 baffle plates arranged in the region that is likely to occur, in such a case, only these 4 to 7 baffle plates are individually engaged with the outer cylinder, and “the cylinder axis of the outer cylinder” It is also possible to prevent “rotation around”.

  The carbon black production system of the present invention is “to supply fuel and air to the reactor inlet to generate high-temperature combustion gas, spray the raw material oil into the generated combustion gas to generate carbon black, and stop the reaction The carbon black production system for collecting the carbon black by passing the high-temperature exhaust gas after passing through the heat exchange device to the collection unit ”, wherein the heat exchange device is the one described in claim 1 It is used (claim 2).

  The carbon black production system according to claim 2 may be configured to “heat the air by a heat exchange device to raise the temperature and introduce the heated air into the reaction furnace” (claim 3).

  As described above, in the heat exchange device of the present invention, at least “the baffle plate disposed in the region where the heat transfer tube is likely to buckle” is individually engaged with the outer cylinder, Since the rotation of the heat transfer tube is prevented, deformation of the heat transfer tube is effectively prevented, and “the buckling of the heat transfer tube that has determined the life of the conventional heat exchange device” is less likely to occur. Can be extended effectively. For example, in the case of a heat exchange device used in a carbon black production system, the life span of 4 to 10 years and an average of 6 to 7 years in the past is 8 to 20 years on average in the case of the heat exchange device of the present invention. Expect a lifetime of 10-15 years.

Embodiments of the invention will be described below.
FIG. 3 is a view for explaining an outline of a “heat exchange device for a carbon black production system” which is an example of a heat exchange device to which the present invention can be applied.
FIG. 3A schematically shows the structure of the heat exchange device. Reference numeral 10 denotes an “outer cylinder”. The outer cylinder 10 is set with the vertical direction as the vertical direction when in use. The outer cylinder 10 has a cylindrical shape, and the height (length) is, for example, 14.5 m, and the upper end portion and the lower end portion have a slightly larger diameter.

  The inner diameter is, for example, 2050 mm at the upper and lower end portions and, for example, 1720 mm at the central portion. An air inflow port 10A is formed in the peripheral wall portion of the “upper portion of the cylinder diameter” at the upper end, and an air outflow port 10B is formed in the peripheral wall portion of the “portion of the slightly larger cylinder diameter” in the lower end portion. Yes.

  The opening at the upper end of the outer cylinder 10 is closed by the upper tube plate 12, and the opening at the lower end is closed by the lower tube plate 14. The lower tube plate 14 has a structure in which an upper plate 14A and a lower plate 14B are integrated with an appropriate interval.

  A cooling air pipe 15 is provided along the axis of the outer cylinder 10 from the center of the upper plate 14 </ b> A of the lower tube sheet 14. The upper end of the cooling air pipe 15 is set to about 4 m to 13.5 m from the lower end of the outer cylinder 10.

  The cooling air CA1 is blown into the gap between the upper and lower plates 14A and 14B of the lower tube plate 14, cools the lower tube plate 14, flows upward in the cooling air tube 15, and becomes the exhaust air CA2 as the outer cylinder 10. It is discharged inside and mixed into “heat exchanged air”. The cooling air pipe 15 is provided as necessary and can be omitted.

Inside the outer cylinder 10, “a large number of heat transfer tubes” are provided in parallel to the cylinder axis direction (vertical direction) of the outer cylinder 10, and the upper and lower ends thereof penetrate the upper tube plate 12 and the lower tube plate 14, respectively. ing.
Reference numeral 16 in FIG. 3A represents one of the “heat transfer tubes constituting a large number of heat transfer tubes”.

  Inside the outer cylinder 10, a plurality of baffle plates BF1, BF2, BF3, BF4,... Constituting a baffle plate group are also provided. In the following, when the baffle plates constituting the baffle plate group are counted from the upper side, the “odd number baffle plate” is represented by a symbol Bfo (o = 1, 3, 5,...), And the “even number baffle plate” is The symbol BFe (e = 2, 4, 6,...) Will be used.

  FIG. 3B shows a state in which the upper tube sheet 12 in FIG. 3A is viewed from above. As shown in the figure, the upper tube sheet 12 has a large number of circular holes, which are penetrated by heat transfer tubes 16-1, 16-2,... 16-i,.

  FIG. 3 (c) is a view for explaining “holding the upper end” of an arbitrary heat transfer tube 16-i by the upper tube sheet 12. In the upper tube sheet 12, a portion for holding the upper end portion of an arbitrary heat transfer tube 16-i is formed as a tube-shaped engagement hole 12-i that slightly protrudes in the thickness direction of the tube plate, and the heat transfer tube 16- The upper end of i passes through the engagement hole 12-i.

  The heat transfer tube 16-i (the upper end portion) fitted in the engagement hole 12-i is fixedly locked to the upper tube plate 12 by a locking means FX using a known expansion tube (bellows) or the like. The In this way, the upper end of the heat transfer tube 16-i is fixedly held by the upper tube sheet 12. Other heat transfer tubes are also fixedly held on the upper tube sheet 12 in the same manner.

  The plurality of heat transfer tubes 16-i and the cooling air tube 15 are held by the lower tube sheet 14 by welding and fixing them to the lower tube sheet. As shown in FIG. 3 (a), in the lower tube plate 14, the lower end portion of the heat transfer tube 16 penetrates the upper plate 14A and the lower plate 14B and is locked to the lower plate 14B. Only the upper plate 14A passes through and is locked to the upper plate 14A.

  FIG. 3D shows even-numbered baffle plates BFe counted from the upper side of the outer cylinder 10. As shown in the figure, the baffle plate BFe has a through hole penetrating a part of the “multiple heat transfer tubes” and the “cooling air tube as necessary”, and the “left side portion is cut off. It has a circular shape (the diameter of this circular shape is 1710 mm, for example).

  FIG. 3E shows an odd-numbered baffle plate BFo counted from the upper side of the outer cylinder 10. As shown in the figure, the baffle plate BFo has a through hole penetrating a part of the “multiple heat transfer tubes” and the “cooling air tube as necessary”, and the “right side portion is cut off. It has a “circular shape”.

  These baffle plates BFo and BFe are alternately provided from the upper side of the outer cylinder 10 as shown in FIG. At this time, between the “circularly cut portion” of the baffle plate and the inner peripheral wall of the outer cylinder 10 (heat exchanged air mainly flows through this portion) as shown in FIG. , It will be distributed alternately left and right.

  In addition, the baffle plates BFe and BFo are described separately in FIGS. 3D and 3E for convenience of explanation, and the baffle plates BFo and BFe are actually the same, and these are alternately shown. It is used after being rotated 180 degrees. The cooling air pipe 15 and the heat transfer tube 16-i are “freely fitted” with “slight play” in the through holes of the baffle plate. In the example in the description, the thickness of the baffle plates BFe and BFo is 10 mm.

  Referring to FIG. 3A, when the heat exchange device is in operation, high-temperature exhaust gas G2 flows upward through a large number of heat transfer tubes 16, and the air A1 to be heat-exchanged is an air inlet at the top of the outer cylinder 10. 10A, flows while meandering between the baffle plates BFe and BFo constituting the baffle plate group, exchanges heat with the exhaust gas G2 through a large number of heat transfer tubes 16, and heats and raises the high temperature air A2 heated. And is taken out from the air outlet 10B.

  The baffle plate group increases the air flow path length in the outer cylinder by meandering the air flow as described above, and increases the contact time and contact area between the air and the heat transfer tube to increase the efficiency of heat exchange. Has a function to enhance.

Next, holding means for holding each baffle plate in the baffle plate group in a predetermined positional relationship in the cylinder axis direction of the outer cylinder will be briefly described with reference to FIG.
Although not shown in FIG. 3, upper end portions of a plurality of tie rods are fixed to a region portion outside the “region in which the through-hole penetrated by the heat transfer tube” is formed in the upper tube plate. It hangs along the inner peripheral surface of the outer cylinder. The tie rod is a stainless steel rod having a cross section of “diameter: a circular shape with a diameter of several tens of millimeters”.

  In FIG. 4, reference numerals 41-1, 41-2, 41-i denote tie rods. The total number of tie rods is usually 10-20. The baffle plates BFe and BFo are provided with through holes for penetrating these tie rods, but these through holes are not shown in FIG.

  When the tie rod is passed through the baffle plate, spacer pipes SP1 and SP2 whose lengths are set according to the baffle plate interval are fitted to the tie rods. The spacer pipes SP1 and SP2 are made of, for example, stainless steel, and have a diameter larger than that of “a through hole through which a tie rod passes” formed in the baffle plate, and have an outer diameter of, for example, about 20 mm.

The length of the spacer pipe SP1 is equal to “the interval between the adjacent baffle plates BFO (= the interval between the adjacent baffle plates BFe (for example, about 1400 mm))”, and the length of the spacer pipe SP2 is “the distance between the adjacent baffle plates BFo”. It is set equal to “the distance from BFe (about 700 mm)”. In this way, the tie rod hangs down inside the outer cylinder, and the lower end portion thereof is bolted at “the lower surface side of the baffle plate at the lowest position”.
In this way, “the individual baffle plates of the baffle plate group are held in the outer cylinder in a predetermined positional relationship in the cylinder axis direction of the outer cylinder”. The plurality of tie rods and spacer pipes described above constitute “holding means”.
What has been described above is “a general configuration of a heat exchange device used in a carbon black production system”.

Here, the “buckling of the heat transfer tube” described above will be described with reference to the example being described.
As described above, the heat transfer tube passes through a plurality of baffle plates, but the interval between the outer periphery of the baffle plate (for example, diameter: 1710 mm) and the inner periphery of the outer cylinder (inner diameter: 1720 mm) is in the cylinder radial direction of the outer cylinder. Is only "a few millimeters at most", and the degree of freedom of displacement of the baffle plate within the outer cylinder is only a few millimeters in the cylinder radial direction.

  Referring to FIG. 5, when buckling occurs in the heat transfer tube, even if the baffle plate BF is displaced in the cylinder radial direction in an attempt to buckle the heat transfer tube in the “cylinder radial direction of the outer cylinder 10”, Since the degree of freedom of displacement of the baffle plate BF in the cylinder 10 in the cylinder radial direction is at most several mm, the displacement of the baffle plate BF in the cylinder radial direction is inhibited by the inner wall of the outer cylinder 10. For this reason, the heat transfer tube cannot buckle in the “cylinder radial direction of the outer cylinder 10”.

  However, since the baffle plate BF is free to “rotate around the axis of the outer cylinder 10”, for example, when the heat transfer tube 162 is to buckle in the direction of the arrow, the baffle plate BF is buckled while rotating the baffle plate BF. It is possible. The direction of buckling of a large number of heat transfer tubes in the outer cylinder 10 is random, but the baffle plate has a direction determined by the resultant force acting on the baffle plate BF when each heat transfer tube tries to buckle. When the BF rotates, each heat transfer tube buckles, and the heat transfer tube bundle buckles so as to be twisted as a whole.

At this time, the amount of deformation for each heat transfer tube due to buckling is not necessarily the same.
For example, assuming that the heat transfer tube 162 is at a position 80 cm from the cylinder axis of the outer cylinder and the baffle plate BF is rotated 6 degrees, the deformation due to buckling is a radius of 80 cm, a circumference of 502.4 cm (= 2 × 80 × 3.14) is about 8.4 cm because it is 1/60, but the heat transfer tube 161 penetrating the through hole near the center of the baffle plate BF is 20 cm from the axis of the outer cylinder. When considered to be in position, the baffle plate BF is only about 2.1 cm, which is 1/4 of the deformation amount of the heat transfer tube 162, for the rotation angle of 6 degrees.

  Both ends of the heat transfer tube are mechanically fixed to the upper and lower tube plates 12 and 14, and the fixing positions are not displaced in a plane perpendicular to the axis of the outer cylinder. For this reason, as shown in FIG. 5B, the state of the buckled heat transfer tube is “a heat transfer tube having a fixed top and bottom”, which is a 3-5 mm “prone to buckling region” below the center. It is in a state of being deformed so as to “curve along the circumferential direction of the inner wall of the outer cylinder (in-plane direction of the drawing)”. The symbol BF in the figure indicates “a plurality of baffle plates arranged in a region where the heat transfer tube is likely to buckle”.

  As described above, the buckling amount of the heat transfer tube is larger as it is closer to the inner peripheral surface of the outer cylinder, and the buckling amount is smaller in the heat transfer tube closer to the axial center.

  In order to prevent such buckling, in the present invention, “at least the baffle plate BF disposed in the region where the heat transfer tube is likely to buckle is prevented from rotating around the cylinder axis of the outer cylinder. Thus, the outer cylinder and the baffle plate are engaged with each other at one or more engaging portions.

1 and 2 show two examples of “engagement between outer cylinder and baffle plate”.
In the example shown in FIG. 1A, rectangular cutouts K1, K2, and K3 are formed as “plate side engaging portions” at three locations on the outer peripheral portion of the baffle plate BF. The baffle plate BF is prevented from rotating by engaging with outer cylinder side engaging portions K4, K5, K6 formed on the surface in the cylinder axis direction.

The “state in the cylinder axis direction” of the engaging portion is shown in FIG. 1B as an example of “engagement between the engaging portions K1 and K4”. The outer cylinder side engaging portion K4 is provided so as to protrude in the cylinder axis direction (vertical direction in the figure) of the outer cylinder by a length necessary for engagement (for example, about 150 mm).
The depth of engagement (engagement width of the outer cylinder in the axial diameter direction) may be about 50 mm, and the widths of the engagement portions K1 and K4 may be appropriately determined to be about 50 mm.

In the example of engagement shown in FIG. 2A, stoppers ST <b> 1 and ST <b> 2 project as “engagement portions” at positions close to the “straight edge” of the baffle plate BF on the inner peripheral surface of the outer cylinder 10. . As illustrated in the stopper ST1 in FIG. 2B, the stopper protrudes in the cylinder axis direction (vertical direction in the figure) of the outer cylinder 10 by a length necessary for engagement (for example, about 150 mm). The engagement width (the contact width of the baffle plate BF and the stopper ST1 in the plane of FIG. 2A) may be about 100 mm. The same applies to the stopper ST2.
When the baffle plate BF tries to rotate, the “end portion of the linear edge” of the baffle plate BF comes into contact with the stopper ST1 or ST2 to prevent the rotation.

In the case of the above-described "outer cylinder length: about 14.5 m, heat transfer tube outer diameter: about 90 mm", buckling is likely to occur in the range of 3 to 5 m below the tube longitudinal center. Yes, in the case of “when the baffle plates are provided at intervals of 70 cm in the axial direction of the outer cylinder” as described above, the number of baffle plates arranged in the region where buckling is likely to occur is about 4-7. In such a case, the number of “baffle plates BF to be engaged with the outer cylinder as in the examples of FIGS. 1 and 2” is about 4-7.
The engagement between the baffle plate and the outer cylinder is not limited to that shown in FIGS. 1 and 2, and various engagement forms are possible as long as the baffle plate can be prevented from rotating.

FIG. 6 conceptually shows one embodiment of the carbon black production system.
As is well known, “carbon black” is basically obtained by “thermal decomposition of hydrocarbons”.

  In the fuel combustion section 1A of the “reactor” indicated by reference numeral 1 in FIG. 6, the fuel F is combusted together with “combustion air A fed by the blower 9 and heated to high temperature by heat exchange in the heat exchange section 5”. It becomes high temperature combustion gas G1. In the reaction unit 1B, the “supplied raw material oil O” is pyrolyzed by the combustion gas G1 to generate carbon black. At this time, the temperature in the reaction part becomes a high temperature of 1200 to 1800 ° C.

The high-temperature exhaust gas G2 containing carbon black that has been quenched in the quenching section 1C provided on the downstream side of the reaction section 1B is taken out from the reactor 1C, but remains at a high temperature of about 1000 ° C. even after quenching. . The high temperature exhaust gas G2 taken out from the reaction furnace 1C passes through the heat exchange section 5 via the rectifying chamber 3 provided on the exhaust gas inlet side of the heat exchange section 5, and is a product of carbon black as a product in the collection section 7. Is collected. In the heat exchanging section 5, the air sent in the normal temperature state by the blower 9 and the “high temperature exhaust gas” exchange heat.
As the heat exchanging portion 5, for example, as described above with reference to FIGS. 1 and 2, “at least the baffle plate disposed in the region where the heat transfer tube is likely to buckle is formed around the cylinder axis of the outer cylinder. In order to prevent rotation, a heat exchanging device in which the outer cylinder and the baffle plate are engaged with each other by one or more engaging portions is used.

  Accordingly, in FIG. 6, the air sent to the heat exchanging unit 5 by the blower 9 is “air to be heat exchanged” denoted by reference numeral A <b> 1 in FIG. 3A, and the combustion air sent from the heat exchanging unit 5 to the reactor 1 </ b> A. The air A is “hot air whose temperature has been increased by heating” indicated by reference numeral A2 in FIG.

  In the “heat exchange device” described above, a large number of heat transfer tubes 16 are arranged inside the outer cylinder 10, the high-temperature gas G2 is circulated through the heat transfer tubes, and the gas is circulated inside the outer cylinder. In the heat exchange device that heats and raises the temperature of the gas by heat exchange with the high-temperature gas, a large number of transmissions are arranged in the outer cylinder 10 and inside the outer cylinder with the longitudinal direction being the axial direction of the outer cylinder. The upper tube plate 12 is provided at the upper part of the heat tube 16 and the outer cylinder 10, holds the upper end side of the multiple heat transfer tubes 16 and closes the upper part of the outer cylinder, and is provided at the lower part of the outer cylinder 10. The lower tube plate 14 that holds the lower end side of the heat transfer tube 16 and closes the lower portion of the outer cylinder, and a plurality of baffle plates BFo and BFe disposed between the upper tube plate 12 and the lower tube plate 14 Consists of multiple baffle plates for heat transfer A baffle plate group that passes through the tube to regulate the heat transfer tubes and meanders the gas flowing inside the outer cylinder, and the individual baffle plates of this baffle plate group are placed in the outer cylinder, and the cylinder axis direction of the outer cylinder The baffle plate BF arranged at least in a region where the heat transfer tube is likely to buckle around the cylinder axis of the outer cylinder 10. (1) The heat exchange device in which the outer cylinder 10 and the baffle plate BF are engaged with each of the baffle plates at one or more engaging portions K1, K4,. ).

  In the “carbon black production system” shown in FIG. 6, the fuel F and air A are supplied to the reactor inlet 1A to generate high-temperature combustion gas, and the raw material in the generated combustion gas G1 Carbon black production in which oil O is sprayed to produce carbon black and the hot exhaust gas G2 after stopping the reaction is passed through the heat exchange device 5 to the collecting unit 7 to collect the carbon black. In the system, the heat exchanger 5 is the one described in claim 1 (Claim 2), the temperature is raised by heating the air by the heat exchanger, and the heated air A is introduced into the reactor. (Claim 3).

  In addition, although what was used for a carbon black production system as embodiment of a heat exchange apparatus was demonstrated above, the heat exchange apparatus of this invention is not limited to this, It can be used for various systems.

It is a figure for demonstrating an example of engagement with a baffle plate and an outer cylinder. It is a figure for demonstrating another example of engagement with a baffle plate and an outer cylinder. It is a figure for demonstrating one example of a heat exchange apparatus. It is a figure for demonstrating the holding means to hold | maintain a baffle plate. It is a figure for demonstrating rotation of the baffle plate by buckling of a heat exchanger tube. It is a figure for demonstrating one Embodiment of the carbon black production system of this invention.

Explanation of symbols

10 outer cylinder
BF Baffle plate K1 Notch (Plate side engaging part)
K4 Outer cylinder side engaging part

Claims (3)

A large number of heat transfer tubes are arranged inside the outer cylinder, a high temperature gas is circulated through the heat transfer tube, a gas is circulated inside the outer cylinder, and the gas is heated and heated by heat exchange with the high temperature gas. In the heat exchange device
An outer cylinder,
Inside this outer cylinder, a large number of heat transfer tubes arranged with the longitudinal direction as the cylinder axis direction of the outer cylinder,
An upper tube plate that is provided at the upper part of the outer cylinder, holds the upper end side of the multiple heat transfer tubes, and closes the upper part of the outer cylinder;
A lower tube plate that is provided at a lower portion of the outer cylinder, holds a lower end side of the multiple heat transfer tubes, and closes the lower portion of the outer cylinder;
Consists of a plurality of baffle plates disposed between the upper tube plate and the lower tube plate, each baffle plate being penetrated by a plurality of heat transfer tubes to regulate the heat transfer tubes, Baffle plate group that meanders the gas flowing through
Holding means for holding the individual baffle plates of the baffle plate group in the outer cylinder in a predetermined positional relationship in the cylinder axis direction of the outer cylinder;
At least one of the outer cylinder and the baffle plate is prevented so that at least a baffle plate disposed in a region where the heat transfer tube is likely to buckle is prevented from rotating around the cylinder axis of the outer cylinder. The heat exchanging device, wherein the baffle plate is engaged with each other at the engaging portion. Fuel and air are supplied to the reactor inlet to generate high-temperature combustion gas, and raw material oil is sprayed into the generated combustion gas to generate carbon black, and the high-temperature exhaust gas after stopping the reaction, In the carbon black production system for collecting the carbon black by passing through the heat transfer tube of the heat exchange device and leading it to the collection unit,
A carbon black production system using the heat exchange apparatus according to claim 1. In the carbon black production system according to claim 2,
A carbon black production system, wherein air is heated by the heat exchange device according to claim 1 to raise the temperature, and the heated air is introduced into a reaction furnace.

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