JP2005315439A - Heat exchanger and protector for heat transfer pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger capable of reducing the abrasion of a heat transfer pipe, and a protector for the heat transfer pipe, capable of protecting the heat exchanger. <P>SOLUTION: This protector used for a conventional protector for the heat transfer pipe, protecting the heat exchanger where thermal fluid flows around the heat transfer pipe in which a fluid flows, comprises a first protector composed of a longitudinal member for covering an outer peripheral face of the heat transfer pipe along the longitudinal direction of the heat transfer pipe, a mounting member for mounting the first protector on the heat transfer pipe and demounting the same from the heat transfer pipe, a second protector composed of a longitudinal member for covering an outer peripheral face of the heat transfer pipe along the longitudinal direction of the heat transfer pipe, and a connecting member for connecting the mounting member with the second protector. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a heat exchanger that exchanges heat between a fluid and a heat fluid by flowing a heat fluid around a heat transfer tube in which a fluid flows, and a protector for a heat transfer tube used in the heat exchanger. In particular, the present invention relates to a heat exchanger suitable for heat recovery from exhaust gas and a heat transfer tube protector used for the heat exchanger.

Heat exchangers are used to burn combustibles such as industrial waste and recover waste heat from combustion gases.
In the heat exchanger, a plurality of heat transfer tubes extend along the horizontal direction, bend at both ends, and are arranged in multiple stages.
For example, the combustion gas is guided in the vertical direction and moves while contacting the heat transfer tubes arranged horizontally in each stage.
The heat of the combustion gas is transmitted to the fluid (for example, gas, water, or steam) flowing through the heat transfer tube and flowing inside the heat transfer tube.
When the combustion gas passes between the heat transfer tubes, the components in the combustion gas are solidified to become dust. The sticky dust adheres to the outer peripheral surface of the heat transfer tube and degrades the heat transfer performance of the heat transfer tube.
Therefore, the soot blowers are arranged at a predetermined pitch in the vertical direction in which the plurality of heat transfer tubes are arranged.
The soot blower injects steam into the heat exchanger. The jetted steam blows away dust adhering to the outer peripheral surface of the heat transfer tube.
By the way, when dust is blown away with steam, the outer peripheral surface of the heat transfer tube is worn by the dust, resulting in a phenomenon of thinning. Therefore, a protector is provided in the heat transfer tube closest to the soot blower.

Generally, the protector is a longitudinal member that covers the upstream surface of the outer peripheral surface of the heat transfer tube along the longitudinal direction of the heat transfer tube. For example, the protector has an inner peripheral surface with a slightly larger curvature than the curvature of the outer peripheral surface of the heat transfer tube. It has a circular cross section.
The protector is worn out by the soot blower spray and is periodically replaced.
As the soot blower is placed in a place where the heat transfer tube is arranged at a rough interval, the operator can easily replace the protector fixed to the heat transfer tube nearest to the foot blower during regular replacement. .
On the other hand, many heat transfer tubes other than the heat transfer tube closest to the soot blower are arranged at a fine pitch, and it is extremely difficult to mount the protector, and it is considered that the wear of the soot blower due to the jet steam is small. Therefore, many heat transfer tubes except for the heat transfer tube closest to the soot blower are usually not provided with a protector.

However, we found a phenomenon where the flow of steam and exhaust gas may be unevenly distributed, and the heat transfer tubes arranged in such a place wear out more than expected. This phenomenon is prominent in the heat transfer tube downstream in the gas flow direction of the heat transfer tube closest to the soot blower. In particular, the heat transfer tube arranged next to the gas flow direction of the heat transfer tube closest to the soot blower is ignored. Unusable wear may occur.
However, since the arrangement pitch of the heat transfer tubes is fine, a protector having a normal structure cannot be provided.

Japanese Utility Model Publication No. 62-24203 Japan Society for Invention and Innovation Open Technical Report No. 91-4645

  As described above, in the heat exchanger that exchanges heat between the fluid and the heat fluid by flowing the heat fluid around the heat transfer tube through which the fluid flows, and the heat exchanger protector for the heat exchanger, wear of the heat transfer tube There has been a demand for a heat exchanger that can suppress the heat and a protector for a heat transfer tube that protects the heat exchanger.

  The present invention has been devised in view of the above-described problems, and an object of the present invention is to provide a heat exchanger that can suppress wear of a heat transfer tube and a heat transfer tube protector that protects the heat exchanger.

  In order to achieve the above object, according to the present invention, a protector for a heat transfer tube for protecting a heat exchanger for flowing a thermal fluid around the heat transfer tube through which the fluid flows inside, the outer peripheral surface of the heat transfer tube in the longitudinal direction of the heat transfer tube A first protector that is a longitudinal member that covers the heat transfer tube, an attachment member that can attach the first protector to the heat transfer tube and that can be removed from the heat transfer tube, and a longitudinal member that covers the outer peripheral surface of the heat transfer tube along the longitudinal direction of the heat transfer tube And a connecting member that connects the mounting member and the second protector.

  With the configuration of the present invention, the first protector is a longitudinal member that covers the outer peripheral surface of the heat transfer tube along the longitudinal direction of the heat transfer tube, and the attachment member can attach the first protector to the heat transfer tube and can be detached from the heat transfer tube. The second protector is a longitudinal member that covers the outer peripheral surface of the heat transfer tube along the longitudinal direction of the heat transfer tube, and the connecting member connects the mounting member and the second protector. The second protector can be attached to the heat transfer tube by being attached to the heat transfer tube, and the second protector can be removed from the heat transfer tube by removing the first protector from the heat transfer tube with the attachment member.

Further, in the heat transfer tube protector according to the embodiment of the present invention, a first fluid that is a location covered by the first protector of the heat transfer tube and a second location that is a location covered by the second protector of the heat transfer tube are thermal fluids. It is arranged in order along the flow direction of the.
According to the configuration of the present invention, since the first portion and the second portion are sequentially arranged along the flow direction in which the thermal fluid flows, the first portion and the second portion that are arranged along the flow direction are elongated members. Even if a drift occurs in the flow of the thermal fluid, it is possible to suppress wear at the first and second locations of the heat transfer tube.

Furthermore, the protector for heat transfer tubes according to the embodiment of the present invention is adjacent to the direction intersecting the flow direction of the thermal fluid in a state where the connecting member and the second protector are combined and integrated. It is possible to pass through a gap between a pair of heat transfer tubes arranged side by side.
With the above-described configuration of the present invention, the connecting member and the second protector which are combined and integrated can pass through a gap between a pair of heat transfer tubes arranged adjacent to each other in a direction intersecting the flow direction. Therefore, when the first protector is attached to the heat transfer tube with the attachment member, the second protector can be easily set on the heat transfer tube, and when the attachment member is removed from the heat transfer tube, the first protector and the second protector The protector can be easily removed from the heat transfer tube.

Furthermore, the protector for a heat transfer tube according to the embodiment of the present invention includes a U-bolt in which the mounting member surrounds the heat transfer tube, and a plate member provided with a connecting portion capable of connecting both ends of the U-bolt,
The connecting member is a longitudinal member having one end coupled to the second protector and the other end coupled to the plate member.
According to the configuration of the present invention, the U bolt surrounds the heat transfer tube, the plate member is provided with a connecting portion capable of connecting both ends of the U bolt, and the connecting member connects one end to the second protector and the other end. Since the first protector is attached to the heat transfer tube with the plate member and the U bolt, the second protector can be set on the heat transfer tube. When the member and the U bolt are removed from the first location, the first protector and the second protector can be removed from the heat transfer tube.

Furthermore, the protector for heat transfer tubes according to the embodiment of the present invention has an arc-shaped cross section in which the second protector has an inner peripheral surface having a slightly larger curvature than the arc of the outer peripheral surface of the heat transfer tube, and the connecting member Is an integral structure fixed to the outer peripheral surface of the second protector.
According to the configuration of the present invention, the second protector has an arc-shaped cross section having an inner peripheral surface having a slightly larger curvature than the arc of the outer peripheral surface of the heat transfer tube, and the connecting member is an outer peripheral surface of the second protector. When the first protector is attached to the first location of the heat transfer tube with the mounting member and the connecting member is coupled to the plate member of the mounting member, the inner peripheral surface of the second protector Covers the outer peripheral surface of the heat transfer tube and can suppress wear of the second region of the heat transfer tube.

  In order to achieve the above object, a heat exchanger for exchanging heat between a fluid and a thermal fluid according to the present invention includes a heat transfer tube that allows a fluid to flow inside and a heat medium to flow around the heat exchanger, and an outer peripheral surface of the heat transfer tube. The first protector, which is a longitudinal member covering the longitudinal direction of the heat pipe, and the mounting member which can be attached to and removed from the heat transfer pipe, and the outer peripheral surface of the heat transfer pipe are covered along the longitudinal direction of the heat transfer pipe. A heat transfer tube protector including a second protector that is a longitudinal member and a connecting member that connects the second protector to the mounting member.

  According to the configuration of the present invention, the heat transfer pipe flows a fluid inside and a heat medium flows around the first heat protector, and the first protector covers the outer peripheral surface of the heat transfer pipe along the longitudinal direction of the heat transfer pipe. The first protector is attached to the heat transfer tube, the second protector is a longitudinal member that covers the outer peripheral surface of the heat transfer tube along the longitudinal direction of the heat transfer tube, and the connecting member connects the mounting member and the second protector, The second protector can be attached to the heat transfer tube by attaching the first protector to the heat transfer tube with the attachment member, and the first protector and the second protector can be removed from the heat transfer tube by removing the attachment member from the heat transfer tube. it can.

Furthermore, the heat exchanger according to the embodiment of the present invention includes a soot blower that injects steam to blow away dust accumulated in the heat transfer tube, and a first location that is a location covered by the first protector of the heat transfer tube; The second part, which is the part covered with the second protector of the heat transfer tube, is located in the vicinity of the soot blower and is arranged in order along the flow direction of the thermal fluid.
With the configuration of the present invention, the soot blower injects steam to blow away the dust accumulated in the heat transfer tube, and the first location and the second location are arranged in order along the flow direction of the thermal fluid, and the first location And the second part is located in the vicinity of the soot blower, the first part and the second part arranged in the flow direction can be covered with a longitudinal member, and there is a drift in the flow of steam injected by the soot blower. Even if it arises, the wear of the 1st location and the 2nd location of a heat exchanger tube can be controlled.

Furthermore, in the heat exchanger according to the embodiment of the present invention, the longitudinal member and the second protector are combined and integrated, and are arranged next to each other in a direction intersecting the flow direction of the thermal fluid. It is possible to pass through a gap between a pair of heat transfer tubes.
According to the configuration of the present invention, the elongated member and the second protector that are combined and integrated can pass through a gap between a pair of heat transfer tubes arranged adjacent to each other in a direction intersecting the flow direction. Therefore, when the first protector is attached to the heat transfer tube with the attachment member, the second protector can be easily set to the heat transfer tube in a state of being integrated with the longitudinal member, and the attachment member is removed from the heat transfer tube. The first protector and the second protector can be easily removed from the heat transfer tube.

Furthermore, the heat exchanger according to an embodiment of the present invention includes a U bolt that the mounting member surrounds the heat transfer tube, and a plate member provided with a connecting portion capable of connecting both ends of the U bolt, and the connection The member is a longitudinal member having one end coupled to the second protector and the other end coupled to the plate member.
According to the configuration of the present invention, the U bolt surrounds the heat transfer tube, the plate member is provided with a connecting portion capable of connecting both ends of the U bolt, and the connecting member connects one end to the second protector and the other end. Since the first protector is attached to the heat transfer tube with the plate member and the U bolt, the second protector can be set on the heat transfer tube. If a member and the said U volt | bolt are removed from said 1st location, said 1st protector and said 2nd protector can be removed from a heat exchanger tube.

Furthermore, in the heat exchanger according to an embodiment of the present invention, the second protector has an arc-shaped cross section having an inner peripheral surface with a slightly larger curvature than the arc of the outer peripheral surface of the heat transfer tube, and the connecting member is It is the integral structure fixed to the outer peripheral surface of said 2nd protector.
According to the configuration of the present invention, the second protector has an arc-shaped cross section having an inner peripheral surface having a slightly larger curvature than the arc of the outer peripheral surface of the heat transfer tube, and the connecting member is an outer peripheral surface of the second protector. When the first protector is attached to the first location of the heat transfer tube with the mounting member and the connecting member is coupled to the plate member of the mounting member, the inner peripheral surface of the second protector Covers the outer peripheral surface of the heat transfer tube and can suppress wear of the second region of the heat transfer tube.

As described above, the heat exchanger for protecting the heat exchanger that flows the heat fluid around the heat transfer tube in which the fluid flows inside according to the present invention, and the heat exchange for exchanging heat between the fluid and the heat fluid The vessel has the following effects depending on its configuration.
Since the attachment member for attaching the first protector to the heat transfer tube and the connecting member for connecting the second protector to the attachment member are prepared, the outer peripheral portion of the heat transfer tube can be covered with the longitudinal member, and the first attachment member A 2nd protector can be attached to a heat exchanger tube by attaching a protector to a heat exchanger tube, and a 1st protector and a 2nd protector can be removed by removing the attachment member from a heat exchanger tube.
Further, since the first protector and the second protector cover the first place and the second place, which are sequentially arranged along the flow direction of the thermal fluid, respectively, the first place and the second place arranged along the flow direction are covered. The two places can be covered with the longitudinal member, and even if a drift occurs in the flow of the thermal fluid, wear of the first place and the second place of the heat transfer tube can be suppressed.
Moreover, since the 1st location and the 2nd location are located in the vicinity of a soot blower, it can prevent that the 1st location and 2nd location of a heat exchanger tube wear with the vapor | steam which a soot blower injects.
In addition, the connecting member and the second protector that are integrated with each other can pass through a gap between a pair of adjacent heat transfer tubes arranged side by side in the direction intersecting the flow direction. When the protector is attached to the heat transfer tube, the second protector can be easily set on the heat transfer tube in a state of being integrated with the longitudinal member, and when the attachment member is removed from the heat transfer tube, the first protector and the first The two protectors can be easily removed from the heat transfer tube.
In addition, since the first protector is fixed to the first location with the U bolt and the plate member and the connecting member is coupled to the plate member, the second protector is attached to the first location with the attachment member. It can be set at the second location in an integrated state with the longitudinal member, and when the attachment member is removed from the first location, the first protector and the second protector can be removed from the heat transfer tube. .
The second protector has an arc-shaped cross section having an inner peripheral surface with a slightly larger curvature than the arc of the outer peripheral surface of the heat transfer tube, and the connecting member is fixed to the outer peripheral surface of the second protector. Therefore, when the first protector is attached to the first location of the heat transfer tube with the mounting member, and the coupling member is coupled to the plate member of the mounting member, the inner peripheral surface of the second protector covers the outer peripheral surface of the heat transfer tube. The wear of the second region of the heat transfer tube can be suppressed.

  The best mode for carrying out the present invention will be described below with reference to the drawings. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.

A heat exchanger according to an embodiment of the present invention and a heat transfer tube protector according to an embodiment of the present invention will be described.
FIG. 1 is a conceptual diagram of a heat exchanger according to an embodiment of the present invention. FIG. 2 is a side view of the heat exchanger according to the embodiment of the present invention. Drawing 3 is an AA sectional view of the heat exchanger concerning the embodiment of the present invention. FIG. 4 is a BB cross-sectional view of the heat transfer tube protector according to the embodiment of the present invention. FIG. 5 is a CC cross-sectional view of the heat transfer tube protector according to the embodiment of the present invention.

The heat exchanger 2 is a device that exchanges heat between the fluid 3 and the thermal fluid 4, and is used, for example, when the waste heat is recovered from the combustion gas in the combustion system 1.
For example, a heat exchanger 2 used for cooling exhaust gas in a waste combustion system will be described.
The cooling system is provided at the rear stage of the combustion furnace 5.
The cooling system includes a cavity 6, a boiler 7, an economizer (not shown), and a temperature reducing tower (not shown).
The exhaust gas discharged from the combustion furnace 5 enters the cavity 6.
The cavity 6 is a sealed container having a cooling space.
The exhaust gas leaving the cavity 6 enters the boiler 7.

The boiler 7 is a sealed container having a cooling space in which the heat exchanger 2 is provided. The heat exchanger 2 provided inside the boiler 7 includes a front-stage heat exchanger 2 and a rear-stage heat exchanger 2.
The front heat exchanger 2 heats the steam with the recovered waste heat to produce superheated steam.
The rear-stage heat exchanger 2 superheats the hot water with the recovered waste heat to generate steam, and flows the generated steam to the front-stage heat exchanger 2.
The exhaust gas leaving the boiler 7 is sent to an economizer. The economizer is a tower having a cooling space in which the heat exchanger 2 is provided.
The heat exchanger 2 of the economizer superheats the feed water with the waste heat of the exhaust gas and sends hot water to the heat exchanger 2 at the rear stage of the boiler.
The exhaust gas from the economizer enters the temperature-decreasing tower and is sprayed with water to lower the temperature.

Below, the heat exchanger 2 which concerns on embodiment of this invention is demonstrated.
The heat exchanger 2 is a device that exchanges heat between the fluid 3 and the thermal fluid 4, and includes a heat transfer tube 10, a heat transfer tube protector 20, a soot blower 30, a casing 40, and a collective header 50.
The heat transfer tube 10 is a tube through which a fluid flows and a heat medium flows around. Generally, the heat transfer tube 10 is a circular tube combined with a straight portion and a bent portion. The straight portion of the heat transfer tube 10 extends in a direction that intersects the flow direction of the thermal fluid.
FIG. 2 shows that one heat transfer tube 10 communicates with the inlet assembly header 51 at one end, communicates with the outlet assembly header 52 at the other end, and is arranged in the casing 40 with a single stroke.
FIG. 3 shows that a plurality of heat transfer tubes 10 are arranged in the casing 40 while one end of each of the heat transfer tubes 10 communicates with the inlet assembly header 51 and is maintained at a predetermined pitch distance from each other.

  The heat transfer tube protector 20 is a device for protecting the heat exchanger 2 that flows a thermal fluid around the heat transfer tube 10 in which a fluid flows, and includes a first protector 21, a mounting member 22, a second protector 23, and a connecting member. 24.

The 1st protector 21 is a longitudinal member which covers the outer peripheral surface of the heat exchanger tube 10 along the longitudinal direction of a heat exchanger tube. It is preferable that the longitudinal member covers from one side of the outer peripheral surface of the heat transfer tube 10.
For example, the first protector 21 covers the upstream surface of the outer peripheral surface of the heat transfer tube 10 in the flow direction of the thermal fluid.
2 and 4 show that the first protector 21 is a longitudinal member having an arc-shaped cross section with an inner peripheral surface having a slightly larger curvature than the arc of the outer peripheral surface of the heat transfer tube 10.

The attachment member 22 is a member that can attach the first protector 21 to the heat transfer tube 10 and can be detached from the heat transfer tube 10.
The attachment member 22 includes, for example, a plate member 22a, a U bolt 22b, and a nut 22c.
The plate member 22a is a plate-like member provided with a pair of through-holes through which both ends of the U bolt 22b pass and a through-hole through which the other end of the connecting member 24 described later passes.
The U bolt 22b is a round bar bent in a U shape and provided with male threads at both ends. The curvature of the bent portion of the U bolt 22 b is larger than the curvature of the outer peripheral surface of the heat transfer tube 10.
The nut 22c is a nut that is screwed to both ends of the U-bolt 22b.

The 2nd protector 23 is a longitudinal member which covers the outer peripheral surface of the heat exchanger tube 10 along the longitudinal direction of a heat exchanger tube. The longitudinal member preferably covers the outer peripheral surface of the heat transfer tube 10 from one side.
For example, the second protector 23 covers the surface of the outer peripheral surface of the heat transfer tube 10 on the upstream side in the flow direction of the thermal fluid.
2 and 4 show that the second protector 23 is a longitudinal member having an arc-shaped cross section with an inner peripheral surface having a slightly larger curvature than the arc of the outer peripheral surface of the heat transfer tube 10.

The connecting member 24 is a member that connects the attachment member 22 and the second protector 23.
It is preferable that the connecting member 24 is a longitudinal member having an integral structure in which one end is coupled to the second protector 23 and the other end is coupled to the plate member 22a.
When the second protector 23 has an arc-shaped cross section having an inner peripheral surface with a slightly larger curvature than the arc of the outer peripheral surface of the heat transfer tube, one end of the connecting member 24 is fixed to the outer peripheral surface of the second protector 23. A structure is preferred.
FIG. 5 shows that one end of the connecting member 24 is welded to the second protector 23, and the other end of the connecting member 24 penetrates the through hole of the plate member and is welded from above.
For example, the connecting member 24 has an integral structure composed of a bar member 24a and a cross member 24b.
The bar member 24a is a round bar member that can pass through the through hole of the plate member 22a.
The cross member 24b is a quadrilateral piece of plate material.
The lower end of the bar member 24a is attached and welded to the upper surface of the cross member 24b.
One side of the cross member 24b is welded and fixed to the upper surface of the second protector 23.

The 1st location 11 which is a location covered with the 1st protector of heat exchanger tube 10, and the 2nd location 12 which is the location covered with the 2nd protector of heat transfer tube 10 are arranged in order along the flow direction through which a thermal fluid flows. Is preferred.
Moreover, it is preferable that the 1st location 11 and the 2nd location 12 are located in the vicinity (for example, the vicinity of the upstream or downstream of the flow of a thermal fluid) of the soot blower 30. FIG.
In FIG. 2, the exhaust gas flows from the top to the bottom in the casing 40, the first protector 21 covers the first portion 11 of the heat transfer tube 10 on the lower side of the soot blower 30, and the second protector 22 is further below it. It shows covering the 2nd location 13 of a heat exchanger tube from the top.

In a state where the connecting member 24 and the second protector 23 are combined and integrated, it is preferable that the connecting member 24 and the second protector 23 can pass through a gap between a pair of adjacent heat transfer tubes arranged in a direction crossing the flow direction. .
In FIG. 4 to FIG. 10, a gap between a pair of adjacent heat transfer tubes arranged side by side in a direction intersecting the flow direction in a state where the connecting member 24 and the second protector 23 are combined and integrated. It shows how it goes through.
FIGS. 6 to 8 show that the second protector 23 fixed to the connecting member 24 passes through the gap between the heat transfer tubes 10 arranged side by side.
FIG. 9 shows that the connecting member 24 fixed to the second protector 13 passes through the gap between the heat transfer tubes 10 arranged side by side.
FIG. 10 shows that the second protector 23 fixed to the connecting member 24 covers the second portion 12 of the heat transfer tube 10.

If the heat exchanger of the above-mentioned embodiment and the protector for heat exchanger tubes are used, the following effects can be exhibited.
The outer peripheral surface of the heat transfer tube is covered with the longitudinal member (first protector) along the longitudinal direction, the outer peripheral surface of the heat transfer tube is covered with the longitudinal member (second protector) along the longitudinal direction, and the first protector is transmitted by the mounting member. Since it is attached to the heat pipe and the connecting member connects the attachment member and the second protector, the first protector can be attached to the heat transfer pipe by the attachment member, and the second protector can be attached to the heat transfer pipe. By removing, a 1st protector and a 2nd protector can be removed from a heat exchanger tube.
In addition, since the location where the first protector is attached and the location where the second protector is attached are aligned along the flow direction of the thermal fluid, even if a drift occurs in the flow of the thermal fluid, the wear of the first location and the second location is suppressed. it can.
Moreover, since the 1st location and the 2nd location are located in the vicinity of a soot blower, abrasion with a 1st location and a 2nd location can be suppressed with the vapor | steam which a soot blower injects.
Moreover, since the attachment member uses a U bolt and a plate member, and the connecting member connects the plate member and the second protector, by removing the connection between the U bolt and the plate member, the protector for the heat transfer tube is removed. Can be removed from the heat transfer tube.
In addition, since the connecting member and the second protector are integrated and can pass through the gap between the heat transfer tubes that are adjacent to each other in the direction of the flow of the thermal fluid, the protector for the heat transfer tube can be easily converted into a heat transfer tube. Can be attached.
Further, since the second protector is a longitudinal member having an arc-shaped cross section having an inner peripheral surface having a curvature slightly larger than the curvature of the outer peripheral surface of the heat transfer tube, the second protector is brought into close contact with the outer peripheral surface of the heat transfer tube. be able to.
In addition, since the first protector is a longitudinal member having an arc-shaped cross section having an inner peripheral surface with a curvature slightly larger than the curvature of the outer peripheral surface of the heat transfer tube, the first protector is closely attached to the outer peripheral surface of the heat transfer tube. be able to.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
Although the example in which the connecting member is an integrated structure composed of the bar member and the cross member has been described, the present invention is not limited to this. For example, the connecting member may be a bent bar member, or the bar member and the cross member. The member may be pin-coupled.

It is a conceptual diagram of the heat exchanger which concerns on embodiment of this invention. It is a side view of the heat exchanger which concerns on embodiment of this invention. It is AA sectional drawing of the heat exchanger which concerns on embodiment of this invention. It is BB sectional drawing of the heat exchanger tube protector which concerns on embodiment of this invention. It is CC sectional drawing of the heat exchanger tube protector which concerns on embodiment of this invention. It is the usage explanatory drawing 1 of the heat exchanger tube protector which concerns on embodiment of this invention. It is the usage explanatory drawing 2 of the heat exchanger tube protector which concerns on embodiment of this invention. It is the usage explanatory drawing 3 of the heat exchanger tube protector which concerns on embodiment of this invention. It is the usage explanatory drawing 4 of the heat exchanger tube protector which concerns on embodiment of this invention. It is the usage explanatory drawing 5 of the heat exchanger tube protector which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combustion furnace 2 Heat exchanger 3 Fluid 4 Thermal fluid 5 Combustion furnace 6 Cavity 7 Boiler 10 Heat transfer tube 11 First location 12 Second location 20 Heat transfer tube protector 21 First protector 22 Mounting member 22a Plate member 22b U bolt 22c Nut 23 2nd protector 24 Connecting member 24a Bar member 24b Cross member 30 Soot blower 40 Casing 50 Collective header 51 Inlet collective header 52 Outlet collective header

Claims (6)

A heat exchanger protector for protecting a heat exchanger that flows a thermal fluid around a heat transfer tube in which a fluid flows,
A first protector that is a longitudinal member that covers the outer peripheral surface of the heat transfer tube along the longitudinal direction of the heat transfer tube;
An attachment member capable of attaching the first protector to the heat transfer tube and removable from the heat transfer tube;
A second protector that is a longitudinal member that covers the outer peripheral surface of the heat transfer tube along the longitudinal direction of the heat transfer tube;
A connecting member that connects the mounting member and the second protector;
A heat transfer tube protector characterized by comprising: The first location that is the location covered by the first protector of the heat transfer tube and the second location that is the location covered by the second protector of the heat transfer tube are arranged in order along the flow direction of the thermal fluid.
The protector for heat exchanger tubes according to claim 1 characterized by things. In a state where the connecting member and the second protector are combined and integrated, the connecting member and the second protector can pass through a gap between a pair of heat transfer tubes arranged adjacent to each other in a direction intersecting the flow direction of the thermal fluid. is there,
The protector for heat exchanger tubes according to claim 1 characterized by things. The mounting member includes a U bolt that surrounds the heat transfer tube, and a plate member provided with a connecting portion capable of connecting both ends of the U bolt;
The connecting member is a longitudinal member in which one end is coupled to the second protector and the other end is coupled to the plate member.
The protector for heat exchanger tubes according to claim 1 characterized by things. The second protector has an arc-shaped cross section having an inner circumferential surface with a slightly larger curvature than the arc of the outer circumferential surface of the heat transfer tube;
The connecting member is an integral structure fixed to the outer peripheral surface of the second protector.
The protector for heat exchanger tubes according to claim 1 characterized by things. A heat exchanger for exchanging heat between a fluid and a thermal fluid,
A heat transfer tube that allows fluid to flow inside and heat medium to flow around;
The first protector, which is a longitudinal member that covers the outer peripheral surface of the heat transfer tube along the longitudinal direction of the heat transfer tube, the mounting member that can attach the first protector to the heat transfer tube and can be removed from the heat transfer tube, and the outer peripheral surface of the heat transfer tube A heat transfer tube protector having a second protector that is a longitudinal member that covers the longitudinal direction of the first protector and a connecting member that connects the second protector to the mounting member;
A heat exchanger comprising:

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