JPH1163859A - Heat exchanger and burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effect heat exchange with a good thermal efficiency between a heating medium to be heat-exchanged such as gas containing oxygen for combustion and a heat source heating medium such as a combustion exhaust gas. SOLUTION: An introduction chamber 2 for a heating medium to be heat-exchanged and a discharge chamber 3 therefor are parallely formed along a heat source heating medium passage 1 on an outer periphery of the heat source heating medium passage. Introduction side vertical heat-exchanger pipe parts 4 composed of a plurality of pipe bodies 6 to be heat-exchanged, which are respectively allowed to communicate with the introduction chamber 2 at one end of each of them, and a plurality of discharge side vertical heat-exchanger pipe parts 5, which are respectively allowed to communicate with the discharge chamber 3 at one end of each of them, are provided parallely in a direction in which the heating medium in the heating medium passage 1 flows. The other end of each introduction side heat-exchanger pipe part 4 and the other end of each discharge side heat-exchanger pipe part 5 communicate with each other in such a manner that the heat-exchanger pipe parts 4 positioned on the downstream side are allowed to communicate in the order of position from the upstream side of the heat source heating medium passage 1 toward the downstream side thereof, and that the discharge side heat-exchanger pipe parts 5 are allowed to communicate in the order of position from the downstream side of the heating medium passage 1 toward the upstream side thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat medium for heat exchange with a heat medium for heat exchange, for example, in a steel heating furnace, a heat treatment furnace, a glass melting furnace, etc. The present invention relates to a heat exchange device and a burner device for exchanging heat with heat.

[0002]

2. Description of the Related Art In a conventional burner apparatus of this type, a heat exchanger for preheating an oxygen-containing gas for combustion comprises a plurality of straight heat exchange tubes flowing in a flue gas passage of the flue gas in a counterflow direction with respect to the flue gas. In this configuration, the combustion oxygen-containing gas flowing through the heat exchange tube is heated by heat exchange with the combustion exhaust gas to supply a preheated oxygen-containing gas to the combustion section.

[0003]

In the heat exchanger of the above-mentioned conventional burner device, the linear heat exchange tube has a different temperature distribution between the upstream side and the downstream side in the flow direction of the combustion exhaust gas. There was a problem of being easily damaged by heat.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has an object to provide a heat exchange device and a burner device capable of efficiently exchanging a heat exchange heat medium such as oxygen-containing gas for combustion with a heat source heat medium such as combustion exhaust gas. To provide.

[0005]

According to a first aspect of the present invention, there is provided a heat exchange apparatus comprising: a heat source heat medium passage; and a heat source heat medium flowing along the outer periphery of the heat source heat medium passage. Both ends of the heat exchange heat medium introduction chamber and discharge chamber, which are arranged in parallel with the flow direction, and the heat exchange heat medium introduction chamber and the discharge chamber are connected to each other at the heat source heat medium passage. And a plurality of heat exchange tubes through which the heat exchange heat medium flows.

[0006] Each of the heat exchange pipes has an outer peripheral end connected to the introduction chamber of the heat exchange heat medium, and is orthogonal to the flow direction of the heat source heat medium in the heat source heat medium passage. A spiral inlet-side heat exchange tube portion disposed on the surface, and an outer peripheral end portion connected to the outlet chamber of the heat-exchanged heat medium, respectively, and connected to the flow direction of the heat-source heat medium in the heat-source heat medium passage. A spiral outlet-side heat exchange tube portion, which is disposed on a surface orthogonal to the bottom surface, and inner peripheral ends of the inlet-side heat exchange tube portion and the outlet-side heat exchange tube portion, which are connected to each other to connect the heat source heat medium. And a linear communication pipe disposed in the flow direction of the heat source heat medium flowing through the passage.

Further, the lengths of the communicating pipes for connecting and connecting the inlet side heat exchanging pipes and the outlet side heat exchanging pipes of the respective heat exchanged pipes are different from each other, and the lengths of the communicating pipes are different. Between the inlet and outlet heat exchange pipe sections of the heat exchange pipe section having a longer length, and the inlet and outlet heat exchange sections of the heat exchange pipe section having a shorter length. The pipe sections are sequentially arranged, and the inlet-side heat exchange pipe section and the outlet-side heat exchange pipe section of the plurality of heat exchange pipes are arranged in parallel with the flow direction of the heat source heat medium in the heat medium passage. .

The heat-exchange heat medium introduced into the introduction chamber flows into the spiral introduction-side heat exchange pipe sections of a plurality of heat exchange pipe bodies each having an outer peripheral end communicating with the introduction chamber. Heat exchange with the heat source heat medium flowing through the heat medium passage,
Further, the heat is exchanged with the heat source heat medium via the communication pipes connected to the inner peripheral end of each of the outlet side heat exchange pipes, and flows into the outlet side heat exchange pipes while flowing out to the outlet.

The spiral inlet-side heat exchange portion and the outlet-side heat exchange tube portion of each heat exchange tube are located from the downstream side of the heat medium passage to the upstream side with respect to the flow direction of the heat source heat medium in the heat source heat medium passage. The heat exchange heat medium has a relatively low or high temperature of the heat source heat medium, and the temperature of the heat source heat medium from the introduction side heat exchange tube part is relatively low or high. The heat exchange heat of the heat exchange heat medium flowing into the relatively high or low outlet side heat exchange pipe section and flowing through each heat exchange pipe body is substantially equalized, and the temperature of each heat exchange pipe body is conventionally reduced. Since the temperature rise can be reduced and the heat damage of the heat exchange tube can be reduced as compared with the heat exchange tube arranged linearly in the flow direction of the heat source heat medium in the heat source heat medium passage, the durability can be increased. Further, heat calculation of the heat exchange tube is facilitated.

According to a second aspect of the present invention, in the heat exchange apparatus according to the first aspect, a first heat exchange portion is formed on a downstream side of the heat source heat medium passage where the heat source heat medium flows, and the first heat exchange portion is formed upstream. A second heat exchange section on the side of the heat source heat medium passage, the first heat exchange section forms an inlet chamber for the heat exchange heat medium on the downstream side of the heat source heat medium passage where the heat source heat medium flows, and forms the heat source heat medium. An outlet chamber for the heat exchange heat medium is formed on the upstream side of the medium passage where the heat source heat medium flows, and the second heat exchange section is provided on the upstream side of the heat source heat medium passage where the heat source heat medium flows. Forming an introduction chamber for the heat medium and forming an outlet chamber for the heat exchange heat medium on the downstream side of the heat source heat medium passage where the heat source heat medium flows, and forming the heat exchange heat medium of the first heat exchange section. The introduction chamber for the heat exchange heat medium of the second heat exchange section communicates with the outlet chamber, A plurality of heat exchange tubes in which both ends of the heat exchange unit and the second heat exchange unit are connected to the inlet and outlet chambers of the heat exchange heat medium through which the heat exchange heat medium flows are used as heat source heat sources. It is arranged in the medium passage.

Then, the heat exchange heat medium is exchanged with the first heat exchange section and the second heat exchange section by the heat source heat medium flowing through the heat medium passage, so that the heat recovery rate of the heat source heat medium is increased. Heat is efficiently exchanged with the heat source heat medium, the heat recovery rate of the heat source heat medium is increased, and the heat exchange pipes of the first heat exchange section and the second heat exchange section are Since each inlet-side heat exchange tube and each outlet-side heat exchange tube are located at positions opposite to each other with respect to the flow direction of the heat source heat medium in the heat medium passage, heat exchange between the heat source heat medium and the heat exchange heat medium is performed. The efficiency is increased and the heat exchange heat of the heat exchange heat medium flowing through each heat exchange tube is substantially equalized, so that the temperature rise of each heat exchange tube can be reduced as compared with the heat exchange efficiency. Since the heat damage of the exchange tube can be reduced, the durability is enhanced, and the heat calculation of the heat exchange tube is facilitated.

According to a third aspect of the present invention, there is provided a burner device, comprising: a combustion section; a heat source heat medium passage through which flue gas from the combustion section flows; and the heat source heat medium passage flowing along the outer periphery of the heat source heat medium passage. A combustion oxygen-containing gas introduction chamber and a combustion oxygen-containing gas discharge chamber communicated with the combustion oxygen-containing gas introduction section of the combustion section. A plurality of heat exchange tubes are provided in the heat source heat medium passage, the plurality of heat exchange tubes through which the combustion oxygen-containing gas flows, the ends being connected to the oxygen-containing gas introduction chamber and the discharge chamber.

Each of the heat exchange pipes has an outer peripheral end connected to the introduction chamber for the oxygen-containing gas for combustion, and a surface orthogonal to the flow direction of the combustion exhaust gas in the heat source heat medium passage. A spiral inlet-side heat exchange tube section disposed in the
A spiral outlet-side heat exchange pipe section which is connected to an outer peripheral end of each of the outlet chambers for the combustion oxygen-containing gas and is disposed on a surface orthogonal to the flow direction of the combustion exhaust gas in the heat source heat medium passage; And linear communication arranged in the flow direction of the combustion exhaust gas flowing through the heat source heat medium passage by connecting the inner peripheral ends of the inlet side heat exchange pipe portion and the outlet side heat exchange tube portion to each other. And a tube portion.

Further, the lengths of the communication pipes for connecting and connecting the inlet-side heat exchange pipes and the outlet-side heat exchange pipes of the respective heat-exchanged pipes are different, and the lengths of the communication pipes are different. Between the inlet and outlet heat exchange pipe sections of the heat exchange pipe section having a longer length, and the inlet and outlet heat exchange sections of the heat exchange pipe section having a shorter length. The pipe sections are sequentially arranged, and the inlet-side heat exchange pipe section and the outlet-side heat exchange pipe section of the plurality of heat exchange pipes are arranged in parallel with the flow direction of the heat source heat medium in the heat medium passage. .

The combustion-containing oxygen-containing gas of the heat exchange heat medium introduced into the introduction chamber receives the spiral introduction heat exchange of a plurality of heat exchange tubes each having an outer peripheral end communicating with the introduction chamber. The heat is exchanged with the combustion exhaust gas of the heat source heat medium flowing into the pipes and flowing through the heat medium passages, and further through the respective communication pipes connected to the inner peripheral end of each of the outlet side heat exchange pipes. The heat-exchanged heat-exchanger flows into the outlet-side heat exchange pipe portion and flows out to the outlet portion while being exchanged with the flue gas. The waste heat of the flue gas can be effectively recovered to preheat the combustion oxygen-containing gas.

The spiral inlet-side heat exchange portion and the outlet-side heat exchange tube portion of each heat exchange tube are located from the downstream side to the upstream side of the heat medium passage with respect to the flow direction of the combustion exhaust gas in the heat source heat medium passage. Since each of the communication pipes is sequentially communicated with each other in order, the combustion oxygen-containing gas has a relatively low or high temperature of the combustion exhaust gas and a relatively high temperature of the combustion exhaust gas from the inlet heat exchange pipe section. The heat exchange heat of the oxygen-containing gas for combustion flowing into the high or low outlet side heat exchange pipe section and flowing through each heat exchange pipe body is substantially equalized, and the temperature of each heat exchange pipe body is reduced by the conventional heat source heat. Since the temperature rise can be reduced and heat damage to the heat exchange tube can be reduced as compared with the heat exchange tube arranged linearly in the flow direction of the combustion exhaust gas in the medium passage, durability can be improved and heat exchange can be performed. Heat calculation of the tube becomes easy.

According to a fourth aspect of the present invention, there is provided the burner device according to the third aspect, wherein a first heat exchange section is formed on the downstream side of the heat source heat medium passage where the combustion exhaust gas flows, and the first heat exchange section is formed on the upstream side. The first heat exchange section forms an introduction chamber for an oxygen-containing gas for combustion on the downstream side of the heat source heat medium passage where the combustion exhaust gas flows, and forms the combustion chamber in the heat source heat medium passage. On the upstream side where the exhaust gas flows, an outlet chamber for the heat exchange heat medium that is communicated with the combustion oxygen-containing gas introduction section of the combustion section is formed, and the second heat exchange section is configured so that the combustion exhaust gas of the heat source heat medium passage is formed. An inlet chamber for the oxygen-containing gas for combustion is formed on the upstream side where the gas flows, and an outlet chamber for the oxygen-containing gas for combustion is formed on the downstream side where the combustion exhaust gas of the heat source heat medium passage flows; Of oxygen-containing gas for combustion The introduction chamber for the oxygen-containing gas for combustion of the second heat exchange section is communicated, and both ends of the first heat exchange section and the second heat exchange section are led out to the introduction chamber for the oxygen-containing gas for combustion. A plurality of heat exchange pipes connected to a chamber and through which a combustion oxygen-containing gas flows are disposed in a heat source heat medium passage.

The combustion-containing oxygen-containing gas of the heat exchange heat medium is exchanged with the combustion exhaust gas flowing through the heat medium passage between the first heat exchange section and the second heat exchange section. Recovery rate is increased, heat exchange with combustion exhaust gas efficiently,
The heat recovery rate of the flue gas is increased, and the waste heat of the flue gas can be effectively recovered to preheat the oxygen-containing gas for combustion.

Furthermore, the heat exchange pipes of the first heat exchange section and the heat exchange pipes of the second heat exchange section are connected to each of the inlet side heat exchange pipes in the flow direction of the combustion exhaust gas in the heat medium passage. Since the heat exchange pipes are located at positions opposite to each other, the heat exchange heat of the oxygen-containing gas flowing through each heat exchange pipe is substantially equalized, and the temperature of each heat exchange pipe is reduced by the heat exchange efficiency. Since the temperature rise can be reduced and the heat damage of the heat exchange tube can be reduced as compared with the above, the durability can be increased and the heat calculation of the heat exchange tube can be easily performed.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the heat exchanger of the present invention will be described with reference to FIGS.

In FIG. 1 and FIG. 2, a heat source heat medium passage 1 is a substantially cylindrical heat source heat medium passage which communicates with a heat source heat medium, for example, a combustion portion of a burner and through which flue gas flows. The heat exchange heat medium, for example, the introduction chamber 2 for the oxygen-containing gas for combustion formed along the outer periphery of the upper half located on the downstream side, and the lower half located on the upstream side of the heat medium passage 1. An outlet chamber 3 for the heat exchange heat medium formed along the outer periphery is arranged in parallel with the flow direction of the heat source heat medium flowing through the heat source heat medium passage 1. The outlet chamber 3 is communicated with, for example, a combustion section of a burner.

Further, both ends of a plurality of heat exchange tubes 6 through which the heat exchange heat medium flows are respectively connected to the introduction chamber 2 and the discharge chamber 3 for the heat exchange heat medium. The exchange pipe 6 is disposed in the heat source heat medium passage 1.

As shown in FIG. 3, each of the heat exchange pipes 6 includes a spiral inlet heat exchanger tube 4, a spiral outlet heat exchanger tube 5, and the inlet heat exchanger tube. A linear communication pipe portion 9 that connects the inner peripheral ends of the heat exchange pipe portion 4 and the outlet side heat communication tube portion 5 to each other is integrally formed. The length of the communication pipe section 9 is different for each heat exchange pipe body 6.

Each of the heat-exchanger tubes 6 has an inlet-side heat-exchange tube 4 having an outer peripheral end connected to the heat-exchanger-medium introduction chamber 2 and connected to the outlet-side heat-exchanger tube. 5 are connected to the outlet chamber 3 in communication with each other, and the spiral inlet-side heat exchange pipe section 4 and the outlet-side heat exchange pipe section 5 are connected to the heat source heat medium passage 1 in the flow direction of the heat source heat medium. Communication pipe portions 9 which are arranged on surfaces orthogonal to
Are disposed in the flow direction of the heat source heat medium flowing through the heat source heat medium passage 1.

The inlet-side heat exchange tube portion 4 of each of the heat-exchanged tubes 6 is connected to the downstream side of the heat-source heat medium passage 1 from the outlet-side heat exchange tube portion 5.

Further, an inlet 7 for the heat exchange medium is formed in the introduction chamber 2, and an outlet 8 is formed in the outlet chamber 3.

As shown in FIGS. 1 and 2, between the inlet side heat exchange pipe part 4 and the outlet side heat exchange pipe part 5 of the heat exchange pipe body 6 having the long communication pipe part 9 long. The inlet side heat exchange pipe section 4 and the outlet side heat exchange pipe section 5 of the heat exchange pipe section 6 having a short communication pipe section 9 are sequentially disposed on the inlet side of the plurality of heat exchange pipe sections 6. The heat exchange pipe section 4 and the outlet heat exchange pipe section 5 are arranged side by side in the flow direction of the heat source heat medium in the heat medium path 1, and the flow direction of the heat source heat medium flowing through the heat medium path 1 and the introduction side heat The flow direction of the heat-exchanged heat medium flowing through the exchange pipe section 4 and the outlet-side heat exchange pipe section 5 is a cross flow, and is disposed at the center of the inlet-side heat exchange pipe section 4 and the outlet-side heat exchange pipe section 5. The flow direction of the heat exchange heat medium flowing in the heat medium passage 1 through each communication pipe portion 9 is parallel to the flow direction of the heat source heat medium.

For example, each of the inlet-side heat exchange tubes 4 of the heat-exchanged tube 6 is disposed downstream of the heat-source heat medium flowing through the heat medium passage 1, and each of the outlet-side heat exchange tubes 5 is connected to the heat-exchange tube 5. The inlet side heat exchange pipe part 4 of the heat exchange pipe body 6 having the longest length of the communication pipe part 9 is disposed on the upstream side of the heat source heat medium flowing through the heat medium passage 1 and is located at the most downstream side of the heat source heat medium. The outlet-side heat exchange pipes 5 are arranged at the most upstream side of the heat source heat medium, and each of the inlet-side heat exchange pipes 4 are arranged from the downstream side of the heat source heat medium in the order in which the length of the communication pipes 9 becomes shorter. In the order located on the upstream side, the outlet-side heat exchange pipe section 5 is disposed in the order located from the upstream side to the downstream side of the exhaust gas passage 1.

The communicating portion between the introduction chamber 2 and each of the introduction side heat exchange pipe sections 4 is sequentially displaced in the circumferential direction as shown in FIG. The communicating part with the pipe part 5 is also deviated sequentially in the circumferential direction.

The inlet-side heat exchange tube 4, the outlet-side heat exchange tube 5, and the communication tube 9 are integrally formed of a heat-resistant metal material such as Inconel or 70% nickel / 15% chromium alloy.

Next, the operation of this embodiment will be described.

An introduction chamber 2 located downstream of the heat medium passage 1
The heat exchange heat medium introduced from the inlet 7 into each of the plurality of heat exchange pipes 6 having one ends communicating with the introduction chamber 2 respectively flows into the spiral introduction-side heat exchange pipe portions 4. The heat exchange between the heat source heat medium flowing through the medium passage 1 and the heat source heat medium is performed in a cross flow.

Further, the heat exchange heat medium flowing to the other end of each of the inlet side heat exchange tubes 4 while being exchanged with the heat source heat medium in each of the inlet side heat exchange tube portions 4 is transferred to each of the communication tube portions 9. Flow while being exchanged with the heat source heat medium flowing through the heat medium passage 1,
The heat-exchanged heat medium flowing into each of the outlet-side heat exchange pipe portions 5 located on the upstream side and communicated with each of the communication tube portions 9 flows into the heat-medium passage 1. The fluid flows in a cross flow with the flowing heat source heat medium, is further exchanged with heat, flows out to the outlet chamber 3, and flows out from the outlet 8.

The heat-exchanged heat medium that has been heat-exchanged with the heat-source heat medium in each of the inlet-side heat-exchange pipe sections 4 passes through the inlet-side heat-exchange pipe section 4 located downstream of the heat medium passage 1. Outlet-side heat exchange pipe portion 5 located upstream of the heat medium passage 1
, The heat exchange heat medium to be exchanged flows from the inlet side heat exchange pipe portion 4 located downstream of the heat source heat medium at a relatively low temperature to the upstream side of the heat source heat medium at a relatively high temperature. The heat exchange heat medium flows from the inlet side heat exchange tube part 4 located on the upstream side where the temperature of the heat source heat medium is relatively high, and the heat exchange heat medium flows into the outlet side heat exchange pipe part 5 The heat exchange heat quantity of the heat exchange heat medium flowing through the heat exchange pipes 6 flowing through the outlet heat exchange pipe portions 5 located on the downstream side of the lower heat exchange pipes is substantially equalized.

In the above-described embodiment, the configuration is described in which the inlet-side heat exchange tube portion 4 and the outlet-side heat exchange tube portion 5 disposed in the substantially cylindrical heat medium passage 1 are formed in a substantially spiral annular shape. As shown in FIG. 4, the heat medium passage 1 is formed in a rectangular shape in cross section, and the inlet side heat exchange tube portion 4 and the outlet side heat exchange tube portion 5 are formed.
May have a substantially spiral rectangular shape, and the cross-sectional shape may be an appropriate shape such as an elliptical shape.

Furthermore, in each of the above embodiments, the heat source heat medium and the heat exchange heat medium have been described as the combustion exhaust gas and the oxygen-containing gas for combustion, for example, air gas. One or both can be liquids.

Next, a configuration of an embodiment of a burner device provided with the heat exchange device of the above embodiment will be described with reference to FIG.

Reference numeral 10 denotes a kiln of the combustion apparatus, which is formed with an outlet 11 for a combustion exhaust gas of a heat source heat medium which communicates with a combustion section in the kiln 10, and an upstream side which communicates with the outlet 11 at a lower portion. A heat source heat medium passage 12 serving as an exhaust gas passage is vertically formed, and an upper portion of the upstream heat source heat medium passage 12 is vertically exhausted through a horizontal intermediate heat source heat medium passage 13. The upper end of the heat source heat medium passage 14 serving as a passage is communicated, the lower end of the downstream heat source heat medium passage 14 is communicated with an exhaust gas discharge passage, and the intermediate combustion exhaust gas passage 13 is covered with a heat insulating material. I have.

Further, an oxygen-containing gas for combustion of the heat exchange heat medium, for example, an air introduction chamber 15 is formed on the outer periphery of the lower half located on the downstream side of the heat source heat medium passage 14 on the downstream side. A discharge chamber 16 for the oxygen-containing gas for combustion is formed on the outer periphery of the upper half located on the upstream side of the heat source heat medium passage 14 on the side. Furthermore, an introduction chamber 18 for a combustion oxygen-containing gas communicated with a connection pipe 17 to the outlet chamber 16 is formed on the outer periphery of a lower half located on the downstream side of the upstream heat source heat medium passage 12. A discharge chamber 19 for the oxygen-containing gas for combustion is formed on the outer periphery of the upper half located on the upstream side of the exhaust gas passage 12 on the downstream side.

Both ends of a plurality of heat exchange tubes 20 through which the heat exchange heat medium flows are respectively connected to the inlet chamber 15 and the discharge chamber 16 of the heat exchange heat medium on the downstream side. Each of the heat exchange tubes 20 is disposed in the heat source heat medium passage 14 on the downstream side to form a first heat exchange unit 21.

Further, both ends of a plurality of heat exchange pipes 22 through which the heat exchange heat medium flows are connected to the upstream side heat exchange heat medium introduction chamber 18 and the discharge chamber 19, respectively. Each of the heat exchange tubes 22 is disposed in the heat source heat medium passage 12 on the upstream side to form a second heat exchange portion 23.

The first and second heat exchange units 2
Each of the heat exchange tubes 20 and 22 shown in FIGS.
With the same configuration as that of the embodiment shown in FIG. 3, the spiral inlet-side heat exchange pipe sections 25 and 26, the spiral outlet-side heat exchange pipe sections 27 and 28, and the inlet-side heat exchange pipe sections 25 and 26 and the outlet-side heat exchanger pipes. A linear communication pipe 2 that connects the inner peripheral ends of the exchange pipes 27 and 28 to each other.
9 and 30 are integrally formed. These communication pipe sections 29, 30
Has a different length for each of the heat exchange tubes 20, 22.

The outer peripheral ends of the inlet-side heat exchange pipe portions 25 and 26 of the heat-exchanger tubes 20 and 22 are connected to the introduction chambers 15 and 18 for the heat-exchange heat medium. Outer peripheral end portions of the outlet-side heat exchange tube portions 27 and 28 are connected to the outlet chambers 16 and 19, respectively, and the spiral inlet-side heat exchange tube portions 25 and 26 and the outlet-side heat exchange tube portions 27 and 28 are connected. Is the heat source heat medium passage 14 on the downstream side.
The heat source heat medium flowing through the heat source heat medium passages 14 and 12 on the downstream side and the upstream side, respectively, are disposed on the surfaces orthogonal to the flow direction of the heat source heat medium. In the direction of flow.

The spiral inlet-side heat exchange tube section 25 of each heat-exchanged pipe body 20 of the first heat exchange section 21 is connected to the heat-source heat medium passage 14 on the downstream side of the outlet-side heat exchange pipe section 27. The spiral inlet-side heat exchange tube portion 26 of each heat-exchanged tube body 22 of the second heat exchange portion 22 is disposed on the downstream side of the heat source heat medium on the upstream side of the outlet-side heat exchange tube portion 28. It is arranged on the upstream side of the passage 12.

An inlet 31 for the heat exchange medium is formed in the introduction chamber 15 formed on the outer periphery of the heat source heat medium passage 14 on the downstream side, and is connected to the outlet chamber 19 of the heat source heat medium passage 12 on the upstream side. Has an outlet 32 formed therein.

The first and second heat exchange units 2
Introducing the heat exchange pipes 25 and 26 and the outlet heat exchange pipes of the heat exchange pipes 20 and 23 having long communication pipe sections 29 and 30 of the heat exchange pipes 20 and 22 of 1 and 23, respectively. Introducing the heat exchange pipe sections 25, 26 and the discharge heat pipe sections 27, 28 of the heat exchange pipe bodies 20, 22 having short communication pipe sections 29, 30 between the pipes 27, 28 in that order. And the inlet-side heat exchange pipe sections 25, 26 and the outlet-side heat exchange pipe sections 27, 28 of the plurality of heat exchange pipe bodies 20, 23 are connected to the downstream and upstream heat medium passages 14,
The heat medium passages are arranged side by side in the flow direction of the 12 heat source heat media.
The flow direction of the heat source heat medium flowing through the heat exchange tubes 14 and 12 and the flow direction of the heat exchange heat medium flowing through the inlet-side heat exchange tube portions 25 and 26 and the outlet-side heat exchange tube portions 27 and 28 have a cross flow. The direction of flow of the heat exchange heat medium flowing through the heat medium passages 14 and 12 flows through the communication pipes 29 and 30 disposed at the center of the heat exchange pipe sections 25 and 26 and the outlet side heat exchange pipe sections 27 and 28, respectively. It is co-current with the flow direction of the heat medium.

For example, each inlet-side heat exchange pipe section 25 of the heat exchange pipe body 20 of the first heat exchange section 21 is disposed downstream of the heat source heat medium flowing through the heat medium passage 14, and each of the heat exchange pipe sections 25 is led out. The side heat exchange tube 27 is disposed downstream of the heat source heat medium flowing through the heat medium passage 14, and the introduction side heat exchange tube 25 of the heat exchange tube 20 having the longest length of the communication tube 29 is At the most downstream side of the heat source heat medium, the outlet side heat exchange pipe section 27 is disposed at the most upstream side of the heat source heat medium, and the introduction side heat exchange pipe sections 25 are arranged in the order of decreasing the length of the communication pipe section 29. Are in the order from the downstream side to the upstream side of the heat source heat medium, and the outlet side heat exchange pipe portion 27 is connected to the heat source heat medium passage 14.
Are arranged in order from the upstream side to the downstream side.

Each of the inlet-side heat exchange tubes 26 of the heat-exchanged tube 22 of the second heat exchange unit 23 is disposed upstream of the heat source heat medium flowing through the heat medium passage 12, and each of the outlet-side heat exchangers 26 is provided. Exchange pipe
28 is disposed downstream of the heat source heat medium flowing through the heat medium passage 12, and the introduction side heat exchange tube portion 26 of the heat exchange tube 22 having the longest communication tube portion 30 is the most heat source heat medium. On the upstream side, the outlet-side heat exchange pipe section 28 is disposed at the most downstream side of the heat source heat medium, and the introduction-side heat exchange pipe sections are arranged in the order in which the length of the communication pipe section 30 becomes shorter.
26 is the order from upstream to downstream of the heat source heat medium,
The outlet-side heat exchange tubes 28 are arranged in the order from the downstream side to the upstream side of the heat source heat medium passage 12.

The first and second heat exchange sections 21 and
The communication sections between the introduction chambers 15 and 18 of 23 and the introduction side heat exchange pipe sections 25 and 26 are sequentially displaced in the circumferential direction, and
The communicating portions between 6, 19 and the respective outlet-side heat exchange tube portions 27, 28 are also sequentially displaced in the circumferential direction.

Further, an introduction port 31 is formed in the introduction chamber 15 located on the downstream side of the heat medium passage 14 on the downstream side of the first heat exchange section 21, and the introduction port 31 is provided on the downstream side of the second heat exchange section 23. Heat medium passage 12
The outlet 32 is connected to the outlet chamber 19 located downstream of the furnace, and the outlet 32 is connected to the combustion section of the kiln 10 of the combustion device 10 through the outlet path.

The inlet-side heat exchange pipe sections 25, 26, the outlet-side heat exchange pipe sections 27, 28, and the communication pipe sections 29, 30 of the heat exchange pipes 20, 22 are made of Inconel or 70% nickel.15%. Molded integrally with heat-resistant metal material such as chrome alloy.

Next, the operation of this embodiment will be described.

The flue gas of the heat source heat medium from the combustion part in the kiln 10 flows through the heat source heat medium passage 12 on the upstream side of the inflow port 11 and flows through the heat exchange pipe 22 of the second heat exchange part 23. The air flowing through the inlet-side heat exchange pipe section 26 and the outlet-side heat exchange pipe section 27 exchanges heat in a counterflow manner, flows through the intermediate heat source heat medium passage 13, flows through the downstream heat source heat medium passage 14, and The oxygen-containing gas for combustion of the heat exchange heat medium, such as air, flowing through the heat exchange pipe section 27 and the heat exchange pipe section 25 of the heat exchange section 21 of the first heat exchange section 21 undergoes heat exchange in a cross flow to release exhaust gas. Released into the road.

The heat exchange heat medium introduced from the introduction port 31 into the introduction chamber 15 located downstream of the heat medium passage 14 downstream of the first heat exchange section 21 is supplied to the introduction chamber 15 respectively. The heat source heat medium flowing into the heat medium passage 14 by flowing into the spiral introduction side heat exchange pipe portions 25 of the plurality of heat exchange pipe bodies 20 having one ends communicating therewith is exchanged with heat.

Further, the heat-exchanged heat medium flowing to the other end of each of the inlet-side heat exchange tubes 25 while exchanging heat with the heat source heat medium in the inlet-side heat-exchange tubes 25 of each heat-exchanged tube 20. Flows while being exchanged with the heat source heat medium flowing through the heat medium passage 14 in each communication pipe section 29, and flows into each outlet side heat exchange pipe section 27 located on the upstream side connected to each communication pipe section 29. The heat-exchanged heat medium that has flowed in and has flowed into each outlet-side heat exchange pipe portion 27 has a cross flow with the heat source heat medium flowing through the heat medium passage 14, is further heat-exchanged, and flows out to the outlet chamber 16. It flows into the introduction chamber 18 of the second heat exchange unit 23 from the outlet chamber 16 via the connection pipe 17.

Each heat exchange pipe of the second heat exchange section 23
The heat-exchanged heat medium flowing to the other end of each of the inlet-side heat exchange tubes 26 while being exchanged with the heat source heat medium at the inlet-side heat exchange tubes 26 of the heat medium passages at the respective communication tubes 30. 12 flows while being heat-exchanged with the heat source heat medium flowing therethrough, flows into each outlet side heat exchange tube portion 28 located on the downstream side communicated with each communication tube portion 30, and each outlet side heat exchange tube portion The heat-exchanged heat medium flowing into the heat source heat medium flowing through the heat medium passage 12 is further exchanged with heat as a direct flow with the heat source heat medium flowing through the heat medium passage 12 and flows out to the discharge chamber 19. Is supplied to the combustion section.

Then, the heat exchange heat medium that has been heat-exchanged with the heat source heat medium in each of the inlet side heat exchange pipe sections 25 and 26 is introduced into the inlet flow side heat exchange pipe sections 25 and 26 of the heat medium passages 14 and 12, respectively. In the first heat exchange section 21, the heat exchange heat medium to be exchanged is the introduction side heat exchange pipe positioned downstream of the heat source heat medium. From the section 25 to the outlet side heat exchange pipe section 27 located upstream of the heat source heat medium, and to the inlet side heat exchange pipe section located upstream of the heat source heat medium
Outlet heat exchange tube located downstream of heat medium from 25
27, the heat exchange heat of the heat exchange heat medium flowing through each heat exchange tube 20 is substantially equalized.

In the second heat exchange section 23, the heat exchange medium to be heat-exchanged is positioned upstream from the heat-source heat medium from the inlet-side heat exchange pipe section 26 located downstream of the heat-source heat medium at a relatively low temperature. The heat exchange heat medium flows from the introduction side heat exchange tube section 26 located on the upstream side of the heat source heat medium to the discharge side heat exchange tube section located on the downstream side of the heat source heat medium. The heat exchange heat of the heat exchange heat medium flowing through the heat exchange tubes 22 flowing through the heat exchange tubes 22 is substantially equalized.

Then, the heat exchange heat medium flowing out to the outlet chamber 19 of the second heat exchange section 23 is a combustion oxygen-containing gas introduction section.
It flows out to 35 and is supplied to the combustion part of the kiln 10.

Further, in each of the above embodiments, the heat source heat medium and the heat exchange heat medium have been described as the combustion exhaust gas and the oxygen-containing gas for combustion, for example, air gas. One or both can be liquids.

[0061]

According to the first aspect of the present invention, the heat exchange heat medium introduced into the introduction chamber of the heat medium passage is substantially equivalent to a plurality of heat exchange pipes each having one end communicating with the introduction chamber. The heat is exchanged with the heat source heat medium flowing into the spiral heat introduction pipe portion and flowing through the heat medium passage, and further through each communication pipe portion connected to the other end of each introduction heat exchange tube portion. While being exchanged with the heat source heat medium, it flows into the outlet heat exchange pipe section and flows out to the outlet chamber.The heat exchange becomes a cross flow and is heat exchanged with high heat efficiency, and each inlet side heat exchange pipe section and the outlet side heat exchange. The heat exchange heat quantity of the heat exchange heat medium flowing through the pipe section is substantially equalized, so that even if the heat exchange rate is increased, the temperature rise of each heat exchange pipe body is low and the heat damage of the heat exchange pipe body can be reduced. To increase durability,
Further, heat calculation of the heat exchange tube is facilitated.

According to the second aspect of the present invention, the heat-exchanged heat medium heat-exchanged in the first heat exchange section on the downstream side of the heat-source heat medium passage is transferred from the outlet chamber to the upstream side of the heat-source heat medium passage. The heat is introduced again into the introduction chamber of the second heat exchanging section and is exchanged again, so that the heat of the heat source heat medium can be efficiently recovered.

According to the third aspect of the present invention, the oxygen-containing gas for combustion, for example, air of the heat exchange heat medium introduced into the introduction chamber of the heat medium passage through which the combustion exhaust gas flows, is supplied to the introduction chamber by one end. The plurality of heat exchange pipes communicates with each other, and heat exchanges with the combustion exhaust gas flowing into the substantially spiral introduction side heat exchange pipes and flowing through the heat medium passage. The heat is exchanged with the combustion exhaust gas through the communication pipes connected to the end and flows to the outlet side heat exchange pipe while flowing out to the outlet chamber.The heat exchange becomes a cross flow and heat is exchanged with high thermal efficiency. The heat exchange heat of the oxygen-containing gas for combustion flowing through the side heat exchange pipe section and the outlet side heat exchange pipe section is substantially equalized, and the temperature rise of each heat exchange pipe body is low even if the heat exchange rate is increased. Since heat damage to the heat exchange tube can be reduced, durability is improved and heat exchange Body heat calculation becomes easy.

According to the fourth aspect of the present invention, the combustion-containing oxygen-containing gas of the heat exchange heat medium that has undergone heat exchange in the first heat exchange section on the downstream side of the heat source heat medium passage is supplied from the outlet chamber to the heat source heat exchange medium. The heat is introduced again into the introduction chamber of the second heat exchange section on the upstream side of the medium passage and heat is exchanged again, so that the heat of the combustion exhaust gas can be efficiently preheated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a heat exchange device showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a perspective view of the heat exchange tube section.

FIG. 4 is a cross-sectional view of a heat exchange device showing another embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a burner device showing another embodiment of the present invention.

[Explanation of symbols]

 1,12,14 Heat source heat medium passage 2,15,18 Inlet chamber 3,16,19 Outlet chamber 4,25,26 Inlet side heat exchange tube 5,27,28 Outlet side heat exchange tube 6,20,22 Heat exchange pipes 9, 29, 30 Communication pipe section 21 First heat exchange section 23 Second heat exchange section

Claims (4)

[Claims] 1. A heat source heat medium passage, and an introduction chamber for a heat exchange heat medium which is arranged along the outer periphery of the heat source heat medium passage in a flow direction of the heat source heat medium flowing through the heat source heat medium passage. And a plurality of heat exchange tubes in which the heat exchange heat medium flows, the heat exchange heat medium flowing through the heat exchange heat medium passage, wherein the heat exchange heat medium flows through the heat exchange heat medium. Wherein each of the heat exchange pipes has an outer peripheral end connected to an introduction chamber of the heat exchange heat medium, and a surface orthogonal to the flow direction of the heat source heat medium in the heat source heat medium passage. And a spiral-shaped inlet-side heat exchange pipe portion, which is disposed at the outer peripheral end of the heat-exchanged heat medium outlet chamber. A spiral outlet-side heat exchange tube portion disposed on a surface orthogonal to the surface, A linear communication pipe portion connected to the inner peripheral end of the heat exchange pipe portion with each other and arranged in the flow direction of the heat source heat medium flowing through the heat source heat medium passage, and The lengths of the communication pipes that connect and connect the inlet-side heat exchange pipe section and the outlet-side heat exchange pipe section of the exchange pipe body are different from each other. The length of the communicating pipe section is short between the side heat exchange pipe section and the discharge side heat exchange pipe section, and the inlet side heat exchange pipe section and the discharge side heat exchange pipe section of the heat exchange pipe body are sequentially arranged. A heat exchange apparatus, wherein an inlet-side heat exchange pipe section and an outlet-side heat exchange pipe section of a plurality of heat exchange pipes are arranged in parallel in a flow direction of a heat source heat medium in the heat medium passage. 2. A first heat exchange section is formed on the downstream side of the heat source heat medium passage where the heat source heat medium flows, and a second heat exchange section is formed on the upstream side, wherein the first heat exchange section is A heat exchange heat medium introduction chamber is formed downstream of the heat source heat medium passage where the heat source heat medium flows, and a heat exchange heat medium outlet chamber is formed upstream of the heat source heat medium passage where the heat source heat medium flows. The second heat exchange unit forms an introduction chamber for the heat exchange heat medium on the upstream side of the heat source heat medium passage where the heat source heat medium flows, and the heat source heat medium of the heat source heat medium passage flows. A discharge chamber for the heat exchange heat medium is formed on the downstream side of the first heat exchange section, and an introduction chamber for the heat exchange heat medium of the second heat exchange section is formed in the discharge chamber for the heat exchange heat medium in the first heat exchange section. Both ends of the first heat exchange unit and the second heat exchange unit are connected to the heat exchange heat medium. Entry and heat exchange device according to claim 1, wherein the heat exchanger heat medium connected to the outlet chamber, characterized in that disposed in the heat source heat medium passage a plurality of the heat exchange tubes body flowing. 3. A combustion section, a heat source heat medium passage through which flue gas from the combustion section flows, and a flow direction of the combustion exhaust gas flowing through the heat source heat medium passage along an outer periphery of the heat source heat medium passage. A combustion oxygen-containing gas introduction chamber and a combustion oxygen-containing gas discharge chamber communicated with the combustion oxygen-containing gas introduction section of the combustion section, and an introduction chamber and a discharge chamber of the combustion oxygen-containing gas. And a plurality of heat exchange pipes disposed in the heat source heat medium passage and having a flow of the oxygen-containing gas for combustion flowing therethrough. A spiral introduction-side heat exchange pipe section which is connected to an outer peripheral end of each of the introduction chambers for the contained gas and is disposed on a surface orthogonal to a flow direction of the combustion exhaust gas in the heat source heat medium passage; Outer end of each oxygen-containing gas communication chamber A spiral outlet-side heat exchange tube portion, which is disposed on a surface orthogonal to the flow direction of the combustion exhaust gas in the heat source heat medium passage, and the inlet-side heat exchange tube portion and the outlet-side heat exchange tube portion; And a linear communication pipe portion connected to the inner peripheral end portions of the heat exchange pipes and disposed in the flow direction of the combustion exhaust gas flowing in the heat source heat medium passage, and the introduction side of each of the heat exchange pipe bodies. The lengths of the communication pipes that connect and connect the heat exchange pipes and the outlet-side heat exchange pipes are different lengths, and the length of the communication pipes is longer than the length of the introduction-side heat exchange pipes of the heat exchange pipes. A plurality of heat exchange pipes are provided by sequentially arranging an inlet heat exchange pipe section and an outlet heat exchange pipe section of a heat exchange pipe body having a short communication pipe section with the outlet heat exchange pipe section. A burner device, wherein a heat-introducing tube portion and an outlet-side heat exchanging tube portion of a body are juxtaposed in a flow direction of a heat source heat medium in the heat medium passage. 4. A first heat exchange section is formed on the downstream side of the heat source heat medium passage where the combustion exhaust gas flows, and a second heat exchange section is formed on the upstream side, wherein the first heat exchange section is A combustion oxygen-containing gas introduction chamber is formed on the downstream side where the combustion exhaust gas of the heat source heat medium passage flows, and the combustion oxygen-containing gas introduction section of the combustion section is formed on the upstream side where the combustion exhaust gas of the heat source heat medium passage flows. The second heat exchange section forms an introduction chamber for the oxygen-containing gas for combustion on the upstream side where the combustion exhaust gas flows in the heat source heat medium passage. A discharge chamber for the oxygen-containing gas for combustion is formed on the downstream side of the heat source heat medium passage where the combustion exhaust gas flows, and a discharge chamber for the oxygen-containing gas for combustion in the first heat exchange section is provided in the second heat exchange section. Communicating the introduction chamber for the oxygen-containing gas for combustion, A plurality of heat exchange tubes through which the oxygen-containing gas for combustion flows are connected to the inlet and outlet chambers for the oxygen-containing gas for combustion, respectively. 4. The burner device according to claim 3, wherein the burner device is disposed in the medium passage.