CN217953236U - Radiant heat transfer type heat pipe heat exchanger and sintering ignition furnace - Google Patents
Radiant heat transfer type heat pipe heat exchanger and sintering ignition furnace Download PDFInfo
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- CN217953236U CN217953236U CN202222240983.9U CN202222240983U CN217953236U CN 217953236 U CN217953236 U CN 217953236U CN 202222240983 U CN202222240983 U CN 202222240983U CN 217953236 U CN217953236 U CN 217953236U
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The utility model discloses a radiant heat transfer formula heat pipe exchanger and sintering ignition stove belongs to indirect heating equipment technical field. This heat exchanger includes: the heat exchange cavity is provided with an inlet and an outlet of a medium to be preheated; the heat exchange tube is arranged between the heat exchange cavity and the heat source and comprises an evaporation section positioned in the heat source and a condensation section positioned in the heat exchange cavity, and the heat exchange tube can transfer heat absorbed by radiation of the evaporation section in the heat source to the condensation section and transfer the heat to a medium to be preheated in the heat exchange cavity; and the clapboard is arranged between the heat source and the heat exchange cavity and is used for sealing the heat exchange tube and the heat exchange cavity. The utility model discloses a radiant heat transfer formula heat pipe exchanger can preheat air or coal gas to more than 400 ℃, compares current heat exchanger heat exchange efficiency and promotes 2-3 times, effectively improves heat exchange efficiency, promotes waste heat recovery and utilization ratio, does benefit to the target that realizes energy saving and emission reduction.
Description
Technical Field
The utility model belongs to the technical field of indirect heating equipment, more specifically says, relates to a radiant heat transfer formula heat pipe exchanger and sintering ignition stove.
Background
Sintering is an important component in the metallurgical industry, particularly in the steel smelting process, and is also one of the key operations affecting the energy consumption index of the whole smelting process. Sintering is a processing method for providing 'fine material' for blast furnace smelting, which is characterized in that prepared raw materials (concentrate, mineral powder, fuel, flux, return ore and the like) are proportioned according to a certain proportion, mixed and granulated to obtain a sintering material meeting requirements, the sintering material is ignited, high temperature is generated by means of combustion of carbon and oxidation of iron minerals, partial components in the sintering material are softened and melted, a certain amount of liquid phase is generated by chemical reaction, and the liquid phase are bonded into blocks when cooled, and the product in the process is called sintering ore.
An ignition furnace is needed in the sintering process, plays a role in sintering ignition and realizing hot air sintering in the ore sintering production process, and the ignition temperature range is usually 1100-1300 ℃, and the ignition temperature is usually controlled at 1150 +/-50 ℃ in actual operation. The ignition furnace is divided into a fire section and a heat preservation section, the conventional structure of the furnace body is an integral frame structure consisting of a furnace top and a side wall, the side wall is provided with a steel plate, and the furnace top is free of the steel plate. The anchoring bricks are hung on the furnace top frame to anchor the furnace top refractory lining on the furnace top. The side wall is provided with a furnace wall steel plate, the material of the side wall refractory lining layer is a heavy castable, the side wall refractory lining adopts a Y-shaped heat-resistant anchoring piece, and the Y-shaped anchoring piece is welded on the side wall steel plate. In the ignition section of the burner, air, gas or other gas is introduced, which is generally heated by heat exchange and then combusted, to increase the efficiency of combustion, so that heat is exchanged through the heat exchange tubes before the air, gas or other gas enters the burner. Currently, a tubular heat exchanger (dividing wall type heat transfer) is basically adopted in a sintering ignition furnace, for example, chinese patent CN201320878438.0 discloses a heat exchanger for an under-machine type double preheating sintering ignition furnace, which is arranged below a sintering machine and comprises a gas inlet to be preheated, a gas outlet, a combustion-supporting air inlet, a combustion-supporting air outlet, a preheating furnace for burning fuel to generate flue gas, a combustion-supporting air heat exchanger and a gas heat exchanger which are arranged in series along the flow direction of the flue gas. For another example, chinese patent CN201510177256.4 discloses a self-preheating sintering ignition furnace, which comprises a sintering ignition furnace body, a hot air delivery pipe, a gas pipeline and a preheating furnace, wherein one end of the hot air delivery pipe and one end of the gas pipeline are connected to a burner of the sintering ignition furnace body, and the other end of the hot air delivery pipe and the other end of the gas pipeline are connected to the preheating furnace.
By analyzing the structure of the heat exchanger disclosed in the patent, the heat transfer area of the heat exchanger is small, air or coal gas is preheated to about 100 ℃, the heat exchange efficiency is low, and the waste heat recovery utilization rate is not beneficial to energy conservation and emission reduction.
Disclosure of Invention
1. Problems to be solved
To the problem that heat exchanger heat exchange efficiency is low among the prior art, the utility model provides a radiant heat transfer formula heat pipe exchanger effectively improves heat exchange efficiency.
Another object of the utility model is to provide a sintering ignition furnace with above-mentioned radiant heat transfer formula heat pipe exchanger.
2. Technical scheme
In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:
the utility model discloses a radiant heat transfer formula heat pipe exchanger, include:
the heat exchange cavity is provided with an inlet and an outlet of a medium to be preheated;
the heat exchange tube is arranged between the heat exchange cavity and the heat source and comprises an evaporation section positioned in the heat source and a condensation section positioned in the heat exchange cavity, working phase-change liquid is arranged in the heat exchange tube, and the heat exchange tube can transfer heat absorbed by radiation of the evaporation section in the heat source to the condensation section and transfer the heat to a medium to be preheated in the heat exchange cavity;
and the clapboard is arranged between the heat source and the heat exchange cavity and realizes the sealing of the heat exchange pipe and the heat exchange cavity.
In a possible embodiment of the present invention, the heat exchange cavity is a box-type structure, a plurality of circular through holes are formed at the bottom of the heat exchange cavity, and the condensation section of the heat exchange tube extends into the heat exchange cavity from the circular through holes; the material of heat exchange cavity is 45# steel or stainless steel.
In a possible embodiment of the present invention, the evaporation section of the heat exchange tube is formed with an axial fin.
In a possible embodiment of the present invention, the condensation section of the heat exchange tube is formed with a radial spiral fin, the maximum diameter of the radial spiral fin is smaller than the diameter of the circular through hole, and the diameter of the circular through hole 111 is 30-120mm, preferably 60-80mm, and further preferably 70mm.
In a possible embodiment of the present invention, the partition board is formed by splicing and combining a plurality of boards.
In a possible embodiment of the present invention, the axial fins, the radial spiral fins and the heat exchange tubes are made of different materials.
In a possible embodiment of the present invention, the heat exchange tube is vertically distributed with respect to the heat exchange cavity.
In a possible embodiment of the present invention, the pitch of the radial helical fin is 5mm to 50mm, preferably 10mm to 40mm, and more preferably 20mm to 30mm.
In a possible embodiment of the present invention, the axial fins are rectangular fins or trapezoidal fins.
The utility model discloses a sintering ignition furnace, including the heat exchanger, the heat exchanger is foretell radiant heat transfer formula heat pipe exchanger.
3. Advantageous effects
Compared with the prior art, the beneficial effects of the utility model are that:
(1) The utility model discloses a radiant heat transfer formula heat pipe exchanger, with the recovery of heat exchange tube principle applied to solid (liquid) body sensible heat to reform transform traditional heat pipe, make the heat exchange tube can effectively absorb the radiant heat of the solid (liquid) body of high temperature, through the analysis of a large amount of experimental data, calculate and obtain the utility model discloses a radiant heat transfer formula heat pipe exchanger can preheat air or coal gas to more than 400 ℃, compares current heat exchanger heat exchange efficiency and promotes 2-3 times, effectively improves heat exchange efficiency, promotes waste heat recovery utilization ratio, does benefit to the target that realizes energy saving and emission reduction;
(2) The utility model discloses a radiant heat transfer type heat pipe exchanger, the evaporation section of the heat exchange pipe is provided with axial fins, which increases the area for receiving radiant heat; the condensing section of the heat exchange tube is provided with radial spiral fins to increase the heat transfer area of the medium to be preheated;
(3) The utility model discloses a radiant heat transfer type heat pipe exchanger, a clapboard separates an evaporation section and a condensation section, and the evaporation section absorbs the radiation from the sensible heat of a solid (liquid) body; the condensing section is sealed in the sealed heat exchange cavity, and a medium to be preheated exchanges heat in the heat exchange cavity through the inlet and the outlet;
(4) The radiant heat transfer type heat pipe exchanger has simple structure and small manufacturing difficulty, can be used for radiant heat of sinter ore/other solid material surfaces or liquid surfaces, and has wider application range;
(5) Compared with the conventional heat exchange equipment, the radiation heat transfer type heat pipe heat exchanger of the utility model is safer and more reliable, and is more suitable for the heat exchange of coal gas and other toxic fluids;
(6) The utility model discloses a radiant heat transfer formula heat pipe exchanger, its heat exchange tube mutually independent even there is certain heat pipe to damage or inefficacy also can not be influential to the fluidic isolation of cold junction and heat transfer.
Drawings
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus are not intended to limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
Fig. 1 is a schematic structural view of a radiant heat transfer type heat pipe exchanger of the present invention;
fig. 2 is a sectional view of the radiant heat transfer type heat pipe exchanger of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic structural view of the heat exchange tube of the present invention;
fig. 5 is a schematic structural diagram of the sintering ignition furnace of the present invention.
Description of reference numerals:
10. a radiant heat transfer type heat pipe heat exchanger; 11. a heat exchange cavity; 111. a circular through hole; 112. an inlet; 113. an outlet; 12. a heat exchange pipe; 121. an evaporation section; 122. an axial fin; 123. a condensing section; 124. a radial helical fin; 13. a partition plate;
20. sintering an ignition furnace; 21. a furnace body; 22. an ignition section; 23. a heat preservation section; 24. a partition wall; 25. a heat-resistant layer; 26. a heat-insulating layer; 27. an outer jacket; 28. and (4) a nozzle.
Detailed Description
The following detailed description of exemplary embodiments of the invention refers to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration exemplary embodiments in which the invention may be practiced. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the invention, it should be understood that other embodiments may be realized and that various changes to the invention may be made without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the present invention is not intended to limit the scope of the invention, as claimed, but is presented for purposes of illustration only and not limitation to provide the best mode contemplated for carrying out the invention and to enable any person skilled in the art to practice the invention. Accordingly, the scope of the invention is to be limited only by the following claims.
The detailed description and exemplary embodiments of the invention may be better understood when read in conjunction with the following drawings, where the elements and features of the invention are identified by reference numerals.
Example 1
As shown in fig. 1 to 5, a radiant heat transfer type heat pipe exchanger 10 of the present embodiment includes a heat exchange chamber 11, a heat exchange pipe 12, and a partition 13.
The heat exchange cavity 11 is of a box-type structure, the material of the heat exchange cavity is 45# steel or stainless steel, preferably stainless steel, an inlet 112 and an outlet 113 of a medium to be preheated are formed on the heat exchange cavity 11, the inlet 112 is connected to a connecting pipeline of the medium to be preheated, and the medium to be preheated can be combustion-supporting air and/or coal gas; a plurality of circular through holes 111 are formed at the bottom of the heat exchange cavity 11, the diameter of the circular through holes 111 is 30mm, 35mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, and 120mm, and in this embodiment, the diameter of the circular through holes 111 is 70mm, which is the best diameter through testing.
In this embodiment, the heat exchanging pipe 12 is disposed between the heat exchanging cavity 11 and the heat source. The heat exchange tube 12 comprises an evaporation section 121 positioned in the heat source and a condensation section 123 positioned in the heat exchange cavity 11, wherein the condensation section 123 extends into the heat exchange cavity 11 from the round through hole 111, and the upper end of the condensation section is welded and fixed with the heat exchange cavity 11; working phase-change liquid is arranged in the heat exchange tube 12, and the working phase-change liquid can be water or biphenyl (C) with a strong polar compound of 26.5 percent 8 H 5 ) 2 And 73.5% of biphenyl ether (C) 6 H 5 ) 2 Co-melting point mixture of) mercury or other working fluid, preferably water, the heat exchange tube 12 being capable of transferring the heat absorbed by radiation from the heat source through the evaporator section 121 to the condenser section 123 and to the combustion air and/or gas inside the heat exchange chamber 11.
Furthermore, a partition plate 13 is arranged between the heat source and the heat exchange cavity 11, the partition plate 13 is formed by splicing and combining a plurality of plate bodies (not marked in the figure), and the partition plate 13 is made of alloy steel, such as 10CrMo910, 13crmo.44 and the like, so that the heat exchange cavity has good high-temperature resistance and low heat conductivity (compared with stainless steel); the plate body is provided with an arc groove matched with the outer diameter of the heat exchange tube 12 so as to facilitate the fixed installation of the heat exchange tube 12.
The partition 13 separates the evaporation section 121 and the condensation section 123 spatially, and the evaporation section 121 absorbs the radiation from the sensible heat of the solid (liquid) body; the condensing section 123 is sealed in the sealed heat exchange cavity 11, the medium to be preheated exchanges heat in the heat exchange cavity 11 through the inlet 112 and the outlet 113, and the partition plate 13 realizes the isolation and sealing of the heat exchange tube 12 and the heat exchange cavity 11.
In order to increase the area for receiving radiant heat, the evaporation section 121 of the heat exchange tube 12 is formed with axial fins 122, and the axial fins 122 are rectangular or trapezoidal; in order to increase the heat transfer area of the medium to be preheated, the condensing section 123 of the heat exchange tube 12 is formed with a radial spiral fin 124, the maximum diameter of the radial spiral fin 124 is smaller than the diameter of the circular through hole 111, and the thread pitch of the radial spiral fin 124 is 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, in this embodiment, the heat transfer efficiency with the thread pitch of 30mm is the best through tests.
The axial fins 122, the radial spiral fins 124 and the heat exchange tube 12 can be made of the same material and are integrally manufactured, so that the manufacturing efficiency is effectively improved. However, the axial fins 122 are generally made of stainless steel or the like due to the restriction requirement (high temperature of the heat source of about 1200 ℃), which increases the cost.
In order to improve the heat transfer efficiency, the axial fins 122, the radial spiral fins 124 and the heat exchange tube 12 are made of different materials, for example, the axial fins 122 are in a high-temperature (generally about 1200 ℃) environment and are made of stainless steel; the radial spiral fin 124 is positioned in the heat exchange cavity 11 with relatively low temperature (generally about 450 ℃), and is made of a commercially available aluminum alloy material; the heat exchange tubes 12 are manufactured integrally, are made of commercially available stainless steel, and have high heat conductivity coefficient.
The utility model discloses a heat exchange tube 12 can for modes such as heat exchange cavity 11 perpendicular/slope distribute, as shown in fig. 3, in this embodiment, heat exchange tube 12 for heat exchange cavity 11 vertical distribution fully increases the effective area of heat transfer.
The partition plate separates the evaporation section from the condensation section, and the evaporation section absorbs the radiation from the sensible heat of the solid (liquid) body; the condensing section is enclosed in the sealed heat exchange cavity, and the medium to be preheated exchanges heat in the heat exchange cavity through the inlet and the outlet, as shown in fig. 2, wherein an arrow indicates a flowing direction of the medium to be preheated.
Example 2
As shown in fig. 5, the sintering ignition furnace 20 of the present embodiment includes a furnace body 21 and a radiant heat transfer type heat pipe exchanger 10, the exterior of the furnace body 21 is of a frame structure, the inner cavity of the furnace body 21 is divided into an ignition section 22 and a heat preservation section 23, and the ignition section 22 and the heat preservation section 23 are separated by a partition wall 24. An integrated heat insulation structure is arranged on the ignition section 22, the partition wall 24 and the heat insulation section 23. The heat preservation structure of integral type, its holistic heat preservation effect is better, reduces split type heat dissipation at the contact department.
The top of the furnace body 21 is provided with a heat insulation structure, the heat insulation structure is connected with the nozzle 28, the heat insulation structure comprises a heat-resistant layer 25, a heat insulation layer 26 and an outer protection layer 27, one side of the heat insulation layer 26 is connected with the outer protection layer 27, the other side of the heat insulation layer is connected with the heat-resistant layer 25, and one side of the heat-resistant layer 25 of the heat insulation structure is arranged towards the direction of the furnace body 21. Among the three-layer insulation construction, from the direction from inside to outside of ignition furnace, be heat-resistant layer 25, heat preservation 26 and outer jacket 27 respectively, heat-resistant layer 25 mainly protects heat preservation 26 and avoids the sintering deposit to splash to the furnace lining under the high temperature of burning and damage heat preservation 26, and heat preservation 26 realizes the inside heat preservation function of ignition furnace, and outer jacket 27 provides the attached point of installation for heat preservation 26 on the one hand, and on the other hand protects heat preservation 26 not damaged.
The insulation layer 26 is made of refractory fiber. The refractory fiber is more convenient to use and install. The insulating layer 26 is composed of a plurality of refractory fiber modules, which are box-shaped. The box-shaped refractory fiber is formed, and the box-shaped refractory fibers can be stacked in the installation process, so that the installation and the disassembly of the refractory fibers are convenient. The insulating layer 26 further includes a refractory fiber blanket disposed between the refractory fiber module and the outer sheath 27, one end of the refractory fiber blanket is connected to the refractory fiber module, and the other end is connected to the outer sheath 27. The box-shaped refractory fiber is required to be connected with the outer protective layer 27 to ensure the stability of the whole arrangement of the box-shaped refractory fiber, so that when the box-shaped refractory fiber is connected with the outer protective layer 27, the box-shaped refractory fiber is connected with the refractory fiber blanket to determine the arrangement position of the box-shaped refractory fiber, the refractory fiber blanket is conveniently fixed with the outer protective layer 27, the use is more convenient, and the cost is lower.
The outer jacket 27 is a steel plate. Two functions of outer jacket 27 are protection heat preservation 26 respectively to and for heat preservation 26 provides the attachment point, the structural stability of heat preservation 26 of being convenient for, both all do not have too much requirement to outer jacket 27's material composition, adopt conventional steel sheet can.
The heat-resistant layer 25 is a heat-resistant steel plate. The heat-resistant layer 25 is mainly provided to prevent the insulating layer 26 from being damaged by the splash in the ignition furnace, and it is preferable to use a heat-resistant steel plate to ensure the service life of the heat-resistant layer 25 and to facilitate the acquisition of the material for the heat-resistant layer 25 because of the high temperature in the ignition furnace.
Through a large amount of experimental data's analysis, calculate and obtain the utility model discloses a radiant heat transfer formula heat pipe exchanger 10 can preheat combustion air or coal gas more than 400 ℃, compares current heat exchanger heat exchange efficiency and promotes 2-3 times, effectively improves heat exchange efficiency, promotes waste heat recovery and utilizes, does benefit to the target that realizes energy saving and emission reduction.
Claims (10)
1. A radiant heat transfer heat pipe exchanger (10) comprising:
the heat exchange cavity (11) is provided with an inlet (112) and an outlet (113) of a medium to be preheated;
the heat exchange tube (12) is arranged between the heat exchange cavity (11) and the heat source and comprises an evaporation section (121) located in the heat source and a condensation section (123) located in the heat exchange cavity (11), working phase-change liquid is arranged in the heat exchange tube (12), and the heat exchange tube (12) can transfer heat absorbed by radiation of the evaporation section (121) in the heat source to the condensation section (123) and transfer the heat to a medium to be preheated in the heat exchange cavity (11);
and the partition plate (13) is arranged between the heat source and the heat exchange cavity (11), and the partition plate (13) is used for sealing the heat exchange tube (12) and the heat exchange cavity (11).
2. The radiant heat transfer type heat pipe exchanger (10) as claimed in claim 1, wherein the heat exchange cavity (11) is a box structure, a plurality of circular through holes (111) are formed at the bottom of the heat exchange cavity (11), and the condensation section (123) of the heat exchange pipe (12) extends into the heat exchange cavity (11) from the circular through holes (111).
3. A radiant heat transfer type heat pipe exchanger (10) as recited in claim 2 wherein the evaporator section (121) of the heat exchange pipe (12) is formed with axial fins (122).
4. A radiant heat transferring heat pipe exchanger (10) according to claim 3 wherein the condenser section (123) of the heat exchange tube (12) is formed with a radial spiral fin (124), the maximum diameter of the radial spiral fin (124) being smaller than the diameter of the circular through hole (111).
5. The radiant heat transfer type heat pipe exchanger (10) as claimed in claim 4, wherein the partition (13) is formed by splicing and combining a plurality of plate bodies.
6. A radiant heat transfer heat pipe exchanger (10) as claimed in claim 4 wherein the axial fins (122), radial helical fins (124) and heat exchange tubes (12) are of different materials.
7. Radiant heat transferring heat pipe exchanger (10) according to claim 1, wherein the heat exchanging pipes (12) are distributed vertically with respect to the heat exchanging cavity (11).
8. A radiant heat transfer heat pipe exchanger (10) as claimed in claim 4 wherein the pitch of the radial helical fins (124) is 5mm to 50mm.
9. A radiant heat transfer heat pipe exchanger (10) as claimed in claim 3 wherein the axial fins (122) are rectangular or trapezoidal pieces.
10. Sintering ignition furnace (20) comprising a heat exchanger, characterized in that the heat exchanger is a radiant heat transfer heat pipe heat exchanger (10) according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222240983.9U CN217953236U (en) | 2022-08-24 | 2022-08-24 | Radiant heat transfer type heat pipe heat exchanger and sintering ignition furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222240983.9U CN217953236U (en) | 2022-08-24 | 2022-08-24 | Radiant heat transfer type heat pipe heat exchanger and sintering ignition furnace |
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| Publication Number | Publication Date |
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| CN217953236U true CN217953236U (en) | 2022-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222240983.9U Active CN217953236U (en) | 2022-08-24 | 2022-08-24 | Radiant heat transfer type heat pipe heat exchanger and sintering ignition furnace |
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| CN (1) | CN217953236U (en) |
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- 2022-08-24 CN CN202222240983.9U patent/CN217953236U/en active Active
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