CN212645468U - High-efficient heat exchanger and use its steel package baking equipment - Google Patents
High-efficient heat exchanger and use its steel package baking equipment Download PDFInfo
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- CN212645468U CN212645468U CN202020307986.8U CN202020307986U CN212645468U CN 212645468 U CN212645468 U CN 212645468U CN 202020307986 U CN202020307986 U CN 202020307986U CN 212645468 U CN212645468 U CN 212645468U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model provides a high-efficiency heat exchanger and a steel ladle baking device using the same, relating to the technical field of metallurgical equipment; a preheating cavity is formed between an outer shell and an inner shell of the high-efficiency heat exchanger and is divided into a first cavity, a second cavity and a third cavity; the second cavity is divided into a plurality of preheating channels by a plurality of heat exchange fins on the inner shell, and the preheating channels are respectively communicated with the first cavity and the third cavity; a preheating medium inlet and a preheating medium outlet on the shell are respectively communicated with the first cavity and the third cavity; the recycling smoke inlet and the recycling smoke outlet on the outer shell are respectively communicated with the inner shell. The baking device adopts the efficient heat exchanger. The utility model realizes high heat exchange efficiency and saves energy; compared with the existing equipment, the service life is prolonged, the operation and maintenance are simple, and the running cost is low.
Description
Technical Field
The utility model relates to a metallurgical equipment technical field specifically is a high-efficient heat exchanger and use its iron and steel package baking equipment.
Background
Metallurgy is the process and technology of extracting metals or metal compounds from minerals to produce metallic materials with certain properties by various processing methods. A steel ladle is common equipment in the metallurgical industry, and the steel ladle needs to be baked and preheated before being used. The existing iron and steel ladle baking device generally has two types of a conventional type and a heat storage type. The conventional baking mode is the most original baking mode, the energy consumption is high, and the effect is worse when low-calorific-value gas is adopted for baking. The heat accumulating type baking device has larger burner, is formed by pouring refractory materials, is provided with a reversing system and a smoke exhaust system, and has a more complex structure; even if the heat accumulating type baking device without induced air and reversing still has the problems of short service life, high system maintenance cost and difficult realization of the bottom temperature of the baking ladle. A large amount of smoke can be generated in the baking preheating process, and in the existing baking equipment, the recovery of smoke waste heat is not ideal, mainly because the smoke recovery amount is small or the whole process can not be recovered, and the service life of a recovery device is not long. In the known roasting devices, only the combustion air is usually preheated, whereas the coal gas medium is rarely preheated. The heat accumulator is used for preheating the gas medium, but the gas medium has great influence on the corrosion and thermal shock of the heat accumulator, and further the service life of the heat accumulator is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a high-efficient heat exchanger and use its iron and steel package baking equipment has solved among the prior art to the iron and steel package toast the unsatisfactory and iron and steel package baking equipment of flue gas waste heat recovery in-process energy consumption that exists big, the structure is complicated, maintain inconvenient, the high problem of running cost.
The technical scheme of the utility model is realized like this:
a high-efficiency heat exchanger comprises an inner shell and an outer shell, wherein the outer shell is covered on the outer side of the inner shell, and a preheating cavity is formed between the outer shell and the inner shell;
the preheating cavity is sequentially divided into a first cavity, a second cavity and a third cavity; the inner shell positioned in the second cavity is provided with a plurality of heat exchange fins, the second cavity is divided into a plurality of preheating channels by the plurality of heat exchange fins, and the preheating channels are respectively communicated with the first cavity and the third cavity;
the shell is provided with a preheating medium inlet and a preheating medium outlet, the preheating medium inlet is communicated with the first cavity, and the preheating medium outlet is communicated with the third cavity;
the shell is provided with a recovery flue gas inlet and a recovery flue gas outlet, the recovery flue gas inlet is communicated with the inner shell positioned in the third cavity, and the recovery flue gas outlet is communicated with the inner shell positioned in the first cavity.
Further, inner shell and shell are cylindric body, the both ends of body are sealed end.
Further, the heat exchange fins are located in the radial direction of the outer shell, and the heat exchange fins extend along the length direction of the inner shell.
Furthermore, a plurality of heat exchange fins are uniformly distributed on the outer peripheral surface of the inner shell.
Further, the recovered flue gas outlet is chimney-shaped.
Furthermore, gaps are reserved between the heat exchange fins and the shell.
The baking device for the steel ladle comprises a cantilever, wherein a baking cover is arranged on the cantilever, a burner is arranged above the baking cover, and the burner is communicated with the baking cover;
the cantilever is provided with a combustion medium heat exchanger and a combustion-supporting medium heat exchanger which both adopt the high-efficiency heat exchanger;
a combustion medium inlet pipe is arranged on the cantilever and is communicated with a preheating medium inlet of the combustion medium heat exchanger; a preheating medium outlet of the combustion medium heat exchanger is communicated with the burner through a combustion medium connecting pipe; the baking cover is provided with a through smoke port at the combustion medium side, and the smoke port at the combustion medium side is communicated with a recovered smoke inlet of the combustion medium heat exchanger;
a combustion-supporting medium inlet pipe is arranged on the cantilever and is communicated with a preheating medium inlet of a combustion-supporting medium heat exchanger; a preheating medium outlet of the combustion-supporting medium heat exchanger is communicated with the burner through a combustion-supporting medium connecting pipe; the baking cover is provided with a through combustion-supporting medium side flue gas port, and the combustion-supporting medium side flue gas port is communicated with a recovery flue gas inlet of the combustion-supporting medium heat exchanger.
Furthermore, the cantilever is of a hollow structure, and the interior of the cantilever is separated by a partition plate to form the combustion medium inlet pipe and the combustion-supporting medium inlet pipe.
Further, the burner, the baking cover, the inner shell, the recovered flue gas inlet and the recovered flue gas outlet are all made of heat-resistant steel.
The utility model has the advantages that:
the utility model has simple structure and convenient use; combustion-supporting media and combustion media are sprayed to the steel ladle through the burner and the baking cover to be burned and baked, and flue gas generated by baking is utilized by the combustion media heat exchanger and the combustion-supporting media heat exchanger so as to preheat the combustion-supporting media and the combustion media, and energy consumption can be reduced. A plurality of preheating channels are formed between the inner shell and the outer shell, smoke passes through the inner shell, combustion-supporting medium/combustion medium passes through the preheating channels, and the combustion-supporting medium/combustion medium and the smoke exchange heat. The flow direction of the flue gas is opposite to that of the combustion-supporting medium/combustion medium, and efficient heat exchange is realized by fully utilizing countercurrent convection heat exchange. The arrangement of the multiple preheating channels in the shell realizes the maximization of heat exchange area, the high turbulence of the flow of combustion-supporting medium/combustion medium, the realization of high heat exchange efficiency and the energy conservation; compared with the existing equipment, the service life is prolonged, the operation and maintenance are simple, and the running cost is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic side view of an embodiment of the present invention;
FIG. 2 is a schematic top view of the embodiment of FIG. 1;
FIG. 3 is a schematic view of a combustion medium heat exchanger;
FIG. 4 is another angle schematic of the combustion medium heat exchanger;
FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 3;
fig. 6 is a schematic top view of the bake lid.
Wherein:
1. an inner shell; 2. a housing; 3. a first chamber; 4. a second chamber; 5. a third chamber; 6. heat exchange fins; 7. a preheating channel; 8. a gap; 9. a preheating medium inlet; 10. a preheating medium outlet; 11. a recovered flue gas inlet; 12. a recovered flue gas outlet; 13. a cantilever; 14. baking the cover; 15. burning a nozzle; 16. a combustion medium heat exchanger; 17. a combustion-supporting medium heat exchanger; 18. a combustion medium connection pipe; 19. a combustion medium side flue gas port; 20. a combustion-supporting medium connecting pipe; 21. and a combustion-supporting medium side flue gas port.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-2 and fig. 6, the baking device for steel ladles in this embodiment includes a cantilever 13, a baking cover 14 is disposed on the cantilever 13, a burner 15 is disposed above the baking cover 14, and the burner 15 is communicated with the baking cover 14.
The cantilever 13 is provided with a combustion medium heat exchanger 16 and a combustion-supporting medium heat exchanger 17, the combustion medium heat exchanger 16 and the combustion-supporting medium heat exchanger 17 have the same structure, and both adopt high-efficiency heat exchangers. Referring to fig. 3-5, the high-efficiency heat exchanger comprises an inner shell 1 and an outer shell 2, wherein the outer shell 2 is covered on the outer side of the inner shell 1, and a preheating cavity is formed between the outer shell 2 and the inner shell 1. The preheating cavity is sequentially divided into a first cavity 3, a second cavity 4 and a third cavity 5. The inner shell 1 positioned in the second cavity 4 is provided with a plurality of heat exchange fins 6, the second cavity 4 is divided into a plurality of preheating channels 7 by the plurality of heat exchange fins 6, and the preheating channels 7 are respectively communicated with the first cavity 3 and the third cavity 5. In this embodiment, a gap 8 is left between the heat exchange fin 6 and the outer shell 2, and a space is reserved for thermal expansion and cold contraction of the inner shell 1, the outer shell 2, the heat exchange fin 6 and the like.
The shell 2 is provided with a preheating medium inlet 9 and a preheating medium outlet 10, the preheating medium inlet 9 is communicated with the first cavity 3, and the preheating medium outlet 10 is communicated with the third cavity 5. The preheating medium, i.e. the combustion medium or combustion-supporting medium, can enter the first chamber 3 from the preheating medium inlet 9, flow into the respective preheating channels 7 again, then converge into the third chamber 5 again and finally exit from the preheating medium outlet 10.
The outer shell 2 is provided with a recycling smoke inlet 11 and a recycling smoke outlet 12, the recycling smoke inlet 11 is communicated with the inner shell 1 located in the third cavity 5, and the recycling smoke outlet 12 is communicated with the inner shell 1 located in the first cavity 3. The recycled flue gas can enter the inner shell 1 through the recycled flue gas inlet 11 and then be discharged through the recycled flue gas outlet 12.
The cantilever 13 is provided with a combustion medium inlet pipe which is communicated with a preheating medium inlet 9 of the combustion medium heat exchanger 16 and used for inputting combustion media into the combustion medium heat exchanger 16. The preheating medium outlet 10 of the combustion medium heat exchanger 16 is communicated with the burner 15 through a combustion medium connecting pipe 18, and is used for inputting the combustion medium into the burner 15. The baking cover 14 is provided with a through flue gas port 19 on the combustion medium side, and the flue gas port 19 on the combustion medium side is communicated with the recovered flue gas inlet 11 of the combustion medium heat exchanger 16 and used for conveying flue gas generated by combustion into the combustion medium heat exchanger 16.
A combustion-supporting medium inlet pipe is arranged on the cantilever 13, and is communicated with the preheating medium inlet 9 of the combustion-supporting medium heat exchanger 17 and used for inputting combustion-supporting medium into the combustion-supporting medium heat exchanger 17. A preheating medium outlet 10 of the combustion-supporting medium heat exchanger 17 is communicated with the burner 15 through a combustion-supporting medium connecting pipe 20 and is used for inputting combustion-supporting medium into the burner 15. The baking cover 14 is provided with a through-going combustion-supporting medium side flue gas port 21, and the combustion-supporting medium side flue gas port 21 is communicated with the recovered flue gas inlet 11 of the combustion-supporting medium heat exchanger 17 and used for conveying flue gas generated by combustion into the combustion-supporting medium heat exchanger 17.
In this embodiment, the cantilever 13 is a hollow structure, and the inside of the cantilever is separated by a partition plate to form the combustion medium inlet pipe and the combustion-supporting medium inlet pipe, so that the structure of the device can be simplified. The high-efficiency heat exchanger is connected with the outside through the flange, so that the replacement and maintenance are more convenient.
In this embodiment, inner shell 1 and outer shell 2 are cylindric body, the both ends of body are sealed end. The heat exchange fins 6 are located in the radial direction of the outer shell 2, and the heat exchange fins 6 extend along the length direction of the inner shell 1. A plurality of the heat exchange fins 6 are uniformly distributed on the outer circumferential surface of the inner casing 1, and as can be seen from fig. 5, the cross section of each heat exchange fin 6 is radial.
In this embodiment, the recovered flue gas outlet 12 is chimney-shaped, and the flue gas after heat exchange can be directly discharged from the recovered flue gas outlet 12.
In this embodiment, the burner 15, the baking cover 14, the inner shell 1, the recovered flue gas inlet 11 and the recovered flue gas outlet 12 are all made of heat-resistant steel, so that the burner can bear the scouring of high-temperature flue gas, and the service life of the burner is prolonged.
In use, the baking cover 14 is placed over the opening of the ladle. The combustion medium is fed in through the combustion medium inlet pipe, wherein the combustion medium is coal gas. At the combustion medium heat exchanger 16, the combustion medium enters the first chamber 3 from the preheating medium inlet 9 of the combustion medium heat exchanger 16, then flows into each preheating channel 7, then converges in the third chamber 5, and finally is discharged from the preheating medium outlet 10 and is sent into the burner 15 through the combustion medium connecting pipe 18. And a combustion-supporting medium is input through the combustion-supporting medium inlet pipe, wherein the combustion-supporting medium adopts air. At the combustion-supporting medium heat exchanger 17, combustion-supporting medium enters the first cavity 3 from a preheating medium inlet 9 of the combustion-supporting medium heat exchanger 17, then flows into each preheating channel 7, then converges in the third cavity 5, and finally is discharged from a preheating medium outlet 10 and is sent into the burner 15 through a combustion-supporting medium connecting pipe 20. The combustion medium and the combustion-supporting medium are converged and combusted in the burner 15, and the burner 15 blows combustion flame into the steel ladle to bake and preheat the steel ladle.
A part of smoke generated during baking of the steel ladle enters the recovered smoke inlet 11 of the combustion medium heat exchanger 16 from the smoke port 19 on the combustion medium side, then passes through the inner shell 1, and finally is discharged from the recovered smoke outlet 12 of the combustion medium heat exchanger 16.
And a part of flue gas generated during baking of the steel ladle enters the recovered flue gas inlet 11 of the combustion-supporting medium heat exchanger 17 from the flue gas port 21 on the combustion-supporting medium side, then passes through the inner shell 1, and finally is discharged from the recovered flue gas outlet 12 of the combustion-supporting medium heat exchanger 17.
In the flowing process of the combustion medium/combustion-supporting medium and the recovered flue gas, the combustion medium/combustion-supporting medium exchanges heat with the recovered flue gas, and the combustion medium/combustion-supporting medium absorbs the heat carried by the recovered flue gas. The flow direction of the flue gas is opposite to the flow direction of the combustion medium/combustion-supporting medium, and the efficient heat exchange is realized by fully utilizing the countercurrent convection heat exchange. The arrangement of the preheating channels 7 in the shell 2 realizes the maximization of heat exchange area, the high turbulence of the flow of combustion media/combustion-supporting media, the realization of high heat exchange efficiency and the energy conservation; compared with the existing equipment, the service life is prolonged, the operation and maintenance are simple, and the running cost is low. Two independent flue gas ports of the combustion medium side flue gas port 19 and the combustion-supporting medium side flue gas port 21 are arranged, so that the recovered flue gas volume is large, the preheating effect is good, the combustion flame is long, and the steel ladle baking preheating is facilitated.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The efficient heat exchanger is characterized by comprising an inner shell and an outer shell, wherein the outer shell is covered on the outer side of the inner shell, and a preheating cavity is formed between the outer shell and the inner shell;
the preheating cavity is sequentially divided into a first cavity, a second cavity and a third cavity; the inner shell positioned in the second cavity is provided with a plurality of heat exchange fins, the second cavity is divided into a plurality of preheating channels by the plurality of heat exchange fins, and the preheating channels are respectively communicated with the first cavity and the third cavity;
the shell is provided with a preheating medium inlet and a preheating medium outlet, the preheating medium inlet is communicated with the first cavity, and the preheating medium outlet is communicated with the third cavity;
the shell is provided with a recovery flue gas inlet and a recovery flue gas outlet, the recovery flue gas inlet is communicated with the inner shell positioned in the third cavity, and the recovery flue gas outlet is communicated with the inner shell positioned in the first cavity.
2. A high efficiency heat exchanger as claimed in claim 1, wherein said inner and outer shells are cylindrical tubes, and said tubes are sealed at both ends.
3. The high efficiency heat exchanger of claim 2, wherein the heat exchange fins are located in a radial direction of the outer shell and extend along a length of the inner shell.
4. A high efficiency heat exchanger as recited in claim 3 wherein said plurality of heat exchanger fins are uniformly distributed on the outer peripheral surface of the inner casing.
5. The high efficiency heat exchanger of claim 1, wherein the recovered flue gas outlet is chimney-like.
6. The high efficiency heat exchanger of claim 1, wherein a gap is left between the heat exchange fin and the housing.
7. The baking device for the steel ladle is characterized by comprising a cantilever, wherein a baking cover is arranged on the cantilever, a burner is arranged above the baking cover, and the burner is communicated with the baking cover;
a combustion medium heat exchanger and a combustion-supporting medium heat exchanger are arranged on the cantilever, and the combustion medium heat exchanger and the combustion-supporting medium heat exchanger both adopt the high-efficiency heat exchanger of any one of claims 1 to 6;
a combustion medium inlet pipe is arranged on the cantilever and is communicated with a preheating medium inlet of the combustion medium heat exchanger; a preheating medium outlet of the combustion medium heat exchanger is communicated with the burner through a combustion medium connecting pipe; the baking cover is provided with a through smoke port at the combustion medium side, and the smoke port at the combustion medium side is communicated with a recovered smoke inlet of the combustion medium heat exchanger;
a combustion-supporting medium inlet pipe is arranged on the cantilever and is communicated with a preheating medium inlet of a combustion-supporting medium heat exchanger; a preheating medium outlet of the combustion-supporting medium heat exchanger is communicated with the burner through a combustion-supporting medium connecting pipe; the baking cover is provided with a through combustion-supporting medium side flue gas port, and the combustion-supporting medium side flue gas port is communicated with a recovery flue gas inlet of the combustion-supporting medium heat exchanger.
8. The steel ladle baking apparatus as claimed in claim 7, wherein the cantilever is a hollow structure, and the inside of the cantilever is partitioned by a partition plate to form the combustion medium inlet pipe and the combustion-supporting medium inlet pipe.
9. The ladle baking apparatus of claim 7, wherein the burner, the baking lid, the inner shell, the recycled flue gas inlet and the recycled flue gas outlet are all made of heat-resistant steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020307986.8U CN212645468U (en) | 2020-03-12 | 2020-03-12 | High-efficient heat exchanger and use its steel package baking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020307986.8U CN212645468U (en) | 2020-03-12 | 2020-03-12 | High-efficient heat exchanger and use its steel package baking equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212645468U true CN212645468U (en) | 2021-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020307986.8U Expired - Fee Related CN212645468U (en) | 2020-03-12 | 2020-03-12 | High-efficient heat exchanger and use its steel package baking equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212645468U (en) |
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2020
- 2020-03-12 CN CN202020307986.8U patent/CN212645468U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210302 |
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| CF01 | Termination of patent right due to non-payment of annual fee |