CN109971904B - Preheating device of iron-smelting furnace for metallurgy - Google Patents
Preheating device of iron-smelting furnace for metallurgy Download PDFInfo
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- CN109971904B CN109971904B CN201910206518.3A CN201910206518A CN109971904B CN 109971904 B CN109971904 B CN 109971904B CN 201910206518 A CN201910206518 A CN 201910206518A CN 109971904 B CN109971904 B CN 109971904B
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- box
- preheating
- air inlet
- exhaust
- inner cavity
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- 238000005272 metallurgy Methods 0.000 title claims abstract description 7
- 238000003723 Smelting Methods 0.000 title description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 229910052742 iron Inorganic materials 0.000 claims abstract description 29
- 238000009413 insulation Methods 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 4
- 239000002918 waste heat Substances 0.000 abstract description 4
- 239000002912 waste gas Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B11/00—Making pig-iron other than in blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
-
- C21B2100/04—
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a preheating device of an iron-making furnace for metallurgy, which comprises an iron-making furnace, wherein a preheating box is fixedly arranged at the bottom of the front surface of the iron-making furnace, an air outlet pipe of the iron-making furnace penetrates through the preheating box and extends into the inner cavity of the preheating box, an exhaust pipe penetrates through the top of the preheating box, a control valve is arranged on the exhaust pipe, an air inlet pipe penetrates through one side of the preheating box, an air inlet box is fixedly arranged in the preheating box through a bolt, and one end of the air inlet pipe penetrates through the air inlet box and extends into the inner cavity of the air inlet box. According to the invention, the preheating box is arranged, the inner cavity of the preheating box is communicated with the inner cavity of the iron making furnace, and the exhaust pipe and the air pressure control valve are arranged, so that high-temperature hot gas in the iron making furnace is discharged to the inner part of the preheating box, and the air entering the iron making furnace through the preheating box is preheated and heated through the matching of the air inlet box, the heating pipeline exhaust box and the exhaust pipe, so that the effects of waste heat utilization, energy conservation and environmental protection are achieved.
Description
Technical Field
The invention relates to the technical field of metallurgical process equipment, in particular to a preheating device of an iron-making furnace for metallurgy.
Background
An iron making furnace is one of metallurgical equipment, and an iron making furnace is equipment for extracting metallic iron from iron-containing minerals (mainly iron oxides).
The existing iron-smelting furnace is provided with a hot air room, the hot air room is a closed device, a hot air pipe is distributed in the hot air pipe, air in the iron-smelting furnace is introduced into the hot air pipe, the hot air pipe is out of the hot air pipe and is high-temperature waste gas discharged from the iron-smelting furnace, when the air flows in the hot air pipe in the hot air room, the flying heat discharged from the iron-smelting furnace is absorbed, the temperature rises, but in the existing hot air room, the heat transfer efficiency of the air entering the iron-smelting furnace is low, the preheating effect is poor, the preheating effect when the air enters the iron-smelting furnace is influenced, and the influence on the temperature in the furnace is large.
Disclosure of Invention
The invention aims to provide a preheating device of an iron making furnace for metallurgy, which has the advantages of quick preheating, energy conservation and environmental protection, and solves the problems that the preheating effect is poor, the preheating effect when air enters the iron making furnace is influenced, and the influence on the temperature in the furnace is great due to the low heat transfer efficiency of the air entering the iron making furnace in the existing hot blast room in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a metallurgical ironmaking furnace preheating device, includes the ironmaking furnace, the positive bottom fixed mounting of ironmaking furnace has the preheating cabinet, the outlet duct of ironmaking furnace runs through the preheating cabinet and extends to in the inner chamber of preheating cabinet, the top of preheating cabinet runs through and is provided with the exhaust pipe, and is provided with the control valve on the exhaust pipe.
An air inlet pipe penetrates through one side of the preheating box, an air inlet box is fixedly installed inside the preheating box through bolts, one end of the air inlet pipe penetrates through the air inlet box and extends into an inner cavity of the air inlet box, a heating pipeline communicated with the inner cavity of the air inlet box is fixedly installed at one end, far away from the air inlet pipe, of the air inlet box, an exhaust box is fixedly installed inside the preheating box, the top and the bottom of the exhaust box are fixedly connected with the top and the bottom of the inner wall of the preheating box respectively, one end, far away from the air inlet box, of the heating pipeline penetrates through one side of the exhaust box and extends into the inner cavity of the exhaust box to be communicated with the inner cavity of the exhaust box, a heat-conducting plate is embedded into one side of the exhaust box, one side of the heat-conducting plate penetrates through the exhaust box and extends to the outer side of the exhaust box, the other side, and the exhaust pipes are spirally arranged in the inner cavity of the heating pipeline, the exhaust pipes penetrate through the front surface of the exhaust box, and one ends of the exhaust pipes penetrate through the preheating box and extend into the inner cavity of the iron making furnace.
Preferably, a heat insulation layer is attached to the inner wall of the preheating box, and the heat insulation layer is formed by bonding a nanometer microporous heat insulation plate and a ceramic fiber plate, and the surface of the heat insulation layer is coated with heat insulation paint.
Preferably, one side of the heat conducting plate, which extends out of the inner cavity of the exhaust box, is provided with a concave-convex groove, and the bottom of the groove is provided with a spherical bump.
Preferably, the heat-conducting plate is inlaid with a copper sheet on one side of the inner cavity of the exhaust box.
Preferably, one side of inlet box runs through and is provided with the connecting pipe, the heating line passes through the inner chamber intercommunication of connecting pipe and inlet box, and the inside of connecting pipe is provided with the fixed plate, the through-hole has been seted up on the fixed plate, and the quantity of through-hole is no less than 3 and is circularized the range on the fixed plate.
Preferably, the number of the heating pipelines is four, and the four heating pipelines are sequentially arranged at equal intervals from top to bottom.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the preheating box is arranged, the inner cavity of the preheating box is communicated with the inner cavity of the iron making furnace, and the exhaust pipe and the air pressure control valve are arranged, so that high-temperature hot gas in the iron making furnace is discharged to the inner part of the preheating box, and the air entering the iron making furnace through the preheating box is preheated and heated through the matching of the air inlet box, the heating pipeline exhaust box and the exhaust pipe, so that the effects of waste heat utilization, energy conservation and environmental protection are achieved.
2. The exhaust box, the heat conducting plate and the heating pipeline are arranged, after the waste gas in the iron-making furnace enters the preheating box, the temperature in the preheating box can be increased, and after the waste gas is contacted with the heat conducting plate, the temperature of the heat conducting plate can be increased.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the preheating chamber of the present invention;
FIG. 3 is a cross-sectional view of an exhaust box and heating duct of the present invention;
fig. 4 is a cross-sectional view of an intake box of the present invention.
In the figure: 1 iron-making furnace, 2 preheating boxes, 3 exhaust pipes, 4 air pressure control valves, 5 air inlet pipes, 6 air inlet boxes, 7 heating pipelines, 8 exhaust boxes, 9 heat-conducting plates, 10 heat-conducting rods, 11 exhaust pipes, 12 heat-insulating layers, 13 grooves, 14 bumps, 15 copper sheets, 16 connecting pipes, 17 fixing plates and 18 through holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, an energy-saving preheating device for an iron making furnace comprises an iron making furnace 1, a preheating box 2 is fixedly installed at the bottom of the front surface of the iron making furnace 1, a heat insulation layer 12 is attached to the inner wall of the preheating box 2, the heat insulation layer 12 is formed by bonding a nano-microporous heat insulation board and a ceramic fiber board, and heat insulation paint is coated on the surface of the heat insulation layer, an air outlet pipe of the iron making furnace 1 penetrates through the preheating box 2 and extends into the inner cavity of the preheating box 2, an exhaust pipe 3 penetrates through the top of the preheating box 2, an air pressure control valve 4 is arranged on the exhaust pipe 3, the air pressure inside the preheating box 2 is controlled by arranging the air pressure control valve 4, the situation that the temperature inside the preheating box 2 is not high due to too fast exhaust gas loss is avoided, meanwhile, the situation that dangerous accidents are caused by too high air pressure inside the preheating box 2 is avoided, and exhaust gas generated during iron making in the iron, after waste gas entered into the inside of preheating cabinet 2, a large amount of heats that contain in the waste gas just can be utilized by preheating cabinet 2 and preheat the air to energy-concerving and environment-protective effect has been reached, and the waste gas through setting up exhaust pipe 3 in with preheating cabinet 2 is discharged.
An air inlet pipe 5 penetrates through one side of the preheating box 2, air enters the preheating box 2 by the aid of the air inlet pipe 5, an air inlet box 6 is fixedly mounted inside the preheating box 2 through bolts, one end of the air inlet pipe 5 penetrates through the air inlet box 6 and extends into an inner cavity of the air inlet box 6, one end, far away from the air inlet pipe 5, of the air inlet box 6 is fixedly provided with four heating pipelines 7 communicated with the inner cavity of the air inlet box 6, after the air enters the air inlet box 6 through the air inlet pipe 5, the air is dispersedly heated through the four heating pipelines 7 by the air inlet box 6, the specific number of the heating pipelines 7 can be set according to requirements, the air is dispersedly heated, the preheating effect is better, the preheating efficiency is higher, the four heating pipelines 7 are sequentially arranged at equal intervals from top to bottom, a connecting pipe 16 penetrates through one side of the air inlet box 6, the heating pipe passes through the inner chamber intercommunication of connecting pipe 16 and inlet box 6, and the inside of connecting pipe 16 is provided with fixed plate 17, through-hole 18 has been seted up on fixed plate 17, and 3 annular range are no less than to the quantity of through-hole 18 on fixed plate 17, through setting up connecting pipe 16, thereby make heating pipe 7 communicate with inlet box 6, when connecting, insert heating pipe 7 in the inside of connecting pipe 16, and through sealing treatment, thereby accomplish the connection, owing to set up fixed plate 17, and set up through-hole 18 on fixed plate 17, thereby increase the atmospheric pressure of air, it is more chaotic when making air get into heating pipe 7, thereby it is more abundant to heat the air current, the inside fixed mounting of preheating cabinet 2 has exhaust box 8, the top and the bottom of exhaust box 8 respectively with the top and the bottom fixed connection of preheating cabinet 2 inner wall, and the one end that heating pipe 7 kept away from inlet box 6 runs through one side of exhaust box 8 and extends to in the inner chamber of exhaust box 8 with the 8, a heat conducting plate 9 is inlaid at one side of the exhaust box 8, a copper sheet 15 is inlaid at one side of the heat conducting plate 9 positioned in the inner cavity of the exhaust box 8, one side of the heat conducting plate 9 penetrates through the exhaust box 8 and extends to the outer side of the child exhaust box 8, one side of the heat conducting plate 9 extending out of the inner cavity of the exhaust box 8 is provided with a concave-convex groove 13, the groove bottom of the groove 13 is provided with a spherical convex block 14, the other side of the heat conducting plate 9 is fixedly connected with one end of a heat conducting rod 10, the other end of the heat conducting rod 10 extends into the inner cavity of the heating pipeline 7 and is spirally arranged in the inner cavity of the heating pipeline 7, when waste gas is exhausted into the inner cavity of the preheating box 2, the temperature in the preheating box 2 is raised, the heat conducting plate 9 is made of metal, the heat transfer efficiency is strong, and because the groove 13 and the convex block 14 are arranged, the contact, after waste gas and heat-conducting plate 9 contact, heat-conducting plate 9 gives copper sheet 15 and heat conduction pole 10 with the heat transfer in the waste gas, thereby make the temperature of copper sheet 15 and heat conduction pole 10 rise, when the air passes through heating tube 7, can be heated by spiral helicine heat conduction pole 10, and can be heated by the secondary after the air enters into exhaust box 8, thereby increase the effect of preheating, exhaust box 8's front is run through and is provided with blast pipe 11, the one end of blast pipe 11 runs through preheating cabinet 2 and extends to in the inner chamber of ironmaking stove 1, the air that gets into in exhaust box 8 can enter into the inside of ironmaking stove 1 through blast pipe 11.
In summary, the following steps: according to the invention, the preheating box 2 is arranged, the inner cavity of the preheating box 2 is communicated with the inner cavity of the iron making furnace 1, and the exhaust pipe 3 and the air pressure control valve 4 are arranged, so that high-temperature hot air in the iron making furnace 1 is discharged to the inside of the preheating box 2, and the air entering the iron making furnace 1 through the preheating box 2 is preheated and heated through the matching of the air inlet box 6, the heating pipeline 7, the exhaust box 8 and the exhaust pipe 11, so that the effects of waste heat utilization, energy conservation and environmental protection are achieved.
In addition, the exhaust box 8, the heat conducting plate 9 and the heating pipeline 7 are arranged, the temperature in the preheating box 2 can be increased after waste gas in the iron making furnace 1 enters the preheating box 2, the temperature of the heat conducting plate 9 can be increased after the waste gas is contacted with the heat conducting plate 9, the contact area with the waste gas is increased by arranging the groove 13 and the convex block 14 on the heat conducting plate 9, the heat conducting efficiency of the heat conducting plate 9 is improved, the heat conducting rod 10 and the copper sheet 15 are arranged, the heat conducting rod 10 can be fully contacted with the spiral heat conducting rod 10 when air passes through the heating pipeline 7, and the air can be contacted with the copper sheet 15 when entering the inner cavity of the exhaust box 8, so that the air heating efficiency is improved, and the phenomenon that insufficient air preheating has great influence on the temperature in the iron making furnace 1 is avoided.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a metallurgical ironmaking furnace preheating device, includes ironmaking furnace (1), its characterized in that: a preheating box (2) is fixedly installed at the bottom of the front face of the iron making furnace (1), an air outlet pipe of the iron making furnace (1) penetrates through the preheating box (2) and extends into an inner cavity of the preheating box (2), an exhaust pipe (3) penetrates through the top of the preheating box (2), and an air pressure control valve (4) is arranged on the exhaust pipe (3);
an air inlet pipe (5) penetrates through one side of the preheating box (2), an air inlet box (6) is fixedly installed inside the preheating box (2) through bolts, one end of the air inlet pipe (5) penetrates through the air inlet box (6) and extends into an inner cavity of the air inlet box (6), a heating pipeline (7) communicated with the inner cavity of the air inlet box (6) is fixedly installed at one end, far away from the air inlet pipe (5), of the air inlet box (6), an exhaust box (8) is fixedly installed inside the preheating box (2), the top and the bottom of the exhaust box (8) are fixedly connected with the top and the bottom of the inner wall of the preheating box (2) respectively, one end, far away from the air inlet box (6), of the heating pipeline (7) penetrates through one side of the exhaust box (8) and extends into the inner cavity of the exhaust box (8) and is communicated with the inner cavity of the exhaust box (8), a heat conducting plate (9) is inlaid at, one side of the heat conduction plate (9) penetrates through the exhaust box (8) and extends to the outer side of the exhaust box (8), the other side of the heat conduction plate (9) is fixedly connected with one end of a heat conduction rod (10), the other end of the heat conduction rod (10) extends into the inner cavity of the heating pipeline (7) and is spirally arranged in the inner cavity of the heating pipeline (7), an exhaust pipe (11) penetrates through the front face of the exhaust box (8), and one end of the exhaust pipe (11) penetrates through the preheating box (2) and extends into the inner cavity of the iron-making furnace (1);
one side of the heat conducting plate (9) extending out of the inner cavity of the exhaust box (8) is provided with a concave-convex groove (13), and the bottom of the groove (13) is provided with a spherical convex block (14);
a copper sheet (15) is embedded on one side of the heat-conducting plate (9) positioned in the inner cavity of the exhaust box (8);
one side of air inlet box (6) is run through and is provided with connecting pipe (16), heating pipeline (7) are through the inner chamber intercommunication of connecting pipe (16) and air inlet box (6), and the inside of connecting pipe (16) is provided with fixed plate (17), through-hole (18) have been seted up on fixed plate (17), and the quantity of through-hole (18) is no less than 3 and is circularized the range on fixed plate (17).
2. A preheating device for an iron making furnace for metallurgy according to claim 1, characterized in that: the inner wall of the preheating box (2) is attached with a heat insulation layer (12), the heat insulation layer (12) is formed by bonding a nanometer microporous heat insulation plate and a ceramic fiber plate, and the surface of the heat insulation layer is coated with heat insulation paint.
3. A preheating device for an iron making furnace for metallurgy according to claim 1, characterized in that: the number of the heating pipelines (7) is four, and the four heating pipelines (7) are sequentially arranged at equal intervals from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910206518.3A CN109971904B (en) | 2017-11-02 | 2017-11-02 | Preheating device of iron-smelting furnace for metallurgy |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711064547.8A CN107816897B (en) | 2017-11-02 | 2017-11-02 | A kind of energy-saving type iron-smelting furnace preheating device |
| CN201910206518.3A CN109971904B (en) | 2017-11-02 | 2017-11-02 | Preheating device of iron-smelting furnace for metallurgy |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711064547.8A Division CN107816897B (en) | 2017-11-02 | 2017-11-02 | A kind of energy-saving type iron-smelting furnace preheating device |
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| Publication Number | Publication Date |
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| CN109971904A CN109971904A (en) | 2019-07-05 |
| CN109971904B true CN109971904B (en) | 2020-10-16 |
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| CN201711064547.8A Active CN107816897B (en) | 2017-11-02 | 2017-11-02 | A kind of energy-saving type iron-smelting furnace preheating device |
| CN201910206518.3A Active CN109971904B (en) | 2017-11-02 | 2017-11-02 | Preheating device of iron-smelting furnace for metallurgy |
| CN201910206517.9A Active CN109971903B (en) | 2017-11-02 | 2017-11-02 | Preheating device of metallurgical iron-making furnace |
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| CN201711064547.8A Active CN107816897B (en) | 2017-11-02 | 2017-11-02 | A kind of energy-saving type iron-smelting furnace preheating device |
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| CN201910206517.9A Active CN109971903B (en) | 2017-11-02 | 2017-11-02 | Preheating device of metallurgical iron-making furnace |
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| CN114540609B (en) * | 2022-01-14 | 2024-05-03 | 湖州中合鑫顺特钢股份有限公司 | Inclined bottom heating process based on heat recovery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1084792C (en) * | 1999-05-31 | 2002-05-15 | 宝山钢铁股份有限公司 | High air-temperature high furnace space gas preheating method |
| US8113269B2 (en) * | 2007-02-22 | 2012-02-14 | Thomas & Betts International, Inc. | Multi-channel heat exchanger |
| CN201355049Y (en) * | 2009-02-26 | 2009-12-02 | 厦门铭光机械制造有限公司 | Hot-air furnace air and gas double preheating all-welded plate-type heat exchanger |
| CN203159649U (en) * | 2013-03-15 | 2013-08-28 | 湘潭步洋能源科技有限公司 | Blast furnace blast negative energy dehumidification device |
| CN203382777U (en) * | 2013-06-20 | 2014-01-08 | 马亚典 | Hot-blast furnace |
| CN203656965U (en) * | 2013-11-25 | 2014-06-18 | 洛阳安拓窑炉环保有限公司 | Air preheating device of kiln |
| CN106224932B (en) * | 2016-07-26 | 2018-11-02 | 苏州必信空调有限公司 | Boiler waste heat recovery system with vertical lower resistance cooling system |
| CN106399612B (en) * | 2016-11-07 | 2019-01-25 | 上海铁戈炉业有限公司 | A kind of preheating energy-saving systems and pre-heating mean |
| CN106765285A (en) * | 2016-12-20 | 2017-05-31 | 靖江博鑫柯曼燃烧器制造有限公司 | A kind of combustion air heat exchanger with space spiral type spiral preheating channel |
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- 2017-11-02 CN CN201711064547.8A patent/CN107816897B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109971903A (en) | 2019-07-05 |
| CN109971903B (en) | 2020-10-30 |
| CN109971904A (en) | 2019-07-05 |
| CN107816897B (en) | 2019-04-23 |
| CN107816897A (en) | 2018-03-20 |
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