CN112128737A - Energy-saving flue gas waste heat recovery pipeline and method - Google Patents
Energy-saving flue gas waste heat recovery pipeline and method Download PDFInfo
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- CN112128737A CN112128737A CN202010943615.3A CN202010943615A CN112128737A CN 112128737 A CN112128737 A CN 112128737A CN 202010943615 A CN202010943615 A CN 202010943615A CN 112128737 A CN112128737 A CN 112128737A
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- pipe
- telescopic pipe
- energy
- check plate
- wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
- F23B80/02—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel by means for returning flue gases to the combustion chamber or to the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses an energy-saving flue gas waste heat recovery pipeline and a method, relating to the technical field of waste heat recovery devices, wherein a telescopic pipe is arranged in a folding shape, hot gas is retained in the telescopic pipe through the obstruction of a check plate, so that the heat energy can be more fully utilized, meanwhile, the air pressure is converted into upright mechanical energy while the gas in the telescopic pipe is continuously expanded, the telescopic pipe is continuously sucked into a fresh water source while being upright, the process is that the telescopic pipe drives the check plate to be contacted with a top block until the telescopic pipe drives the check plate to be communicated with the air pressure inside and outside the telescopic pipe, meanwhile, the telescopic pipe is continuously contracted under the action of self gravity, so that liquid in the telescopic pipe is continuously discharged from a water outlet pipe until the telescopic pipe moves to the lowest position, a cycle is realized, the self-lifting of the telescopic pipe and the self-suction of the liquid in a cavity are realized through, meanwhile, the heat energy of the flue gas is utilized to the maximum extent, and the flue gas is energy-saving and environment-friendly.
Description
The invention relates to a divisional application of an energy-saving flue gas waste heat recovery pipeline, which is applied for 08, 30 and 2019 and has the application number of CN 201910817425.4.
Technical Field
The invention relates to the technical field of waste heat recovery devices, in particular to an energy-saving flue gas waste heat recovery pipeline and a method.
Background
The boiler is an energy converter, which is a device for heating working medium water or other fluids to a certain temperature by using heat energy released by fuel combustion or other heat energy. The heat of the smoke is utilized for the second time, but because the smoke is rapidly discharged after being heated, the heat of the smoke is not completely utilized and is discharged into the atmosphere.
Disclosure of Invention
The invention aims to solve the problems and provides an energy-saving flue gas waste heat recovery pipeline and a method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the telescopic rod comprises a fixed frame, wherein at least one rod body is arranged on the fixed frame, a check plate which slides along the radial direction of the rod body in the length of the rod body is arranged on the rod body, a telescopic pipe is connected to the bottom end of the check plate, and one side of the telescopic pipe is sealed by the check plate;
the top end of the fixed frame is provided with a top block, and when the check plate is contacted with the top block, the check plate is opened;
the pipe wall of the telescopic pipe adopts a double-layer structure, the telescopic pipe is formed by nesting an outer wall and an inner wall, two ends of the outer wall and the inner wall are closed, and a closed cavity is formed between the two ends;
be provided with outlet pipe and inlet tube on the flexible pipe, and outlet pipe and inlet tube all communicate with the cavity, install first check valve on the inlet tube, install the second check valve on the outlet pipe.
Optionally, the outer surface of the rod body is provided with an external thread, the fixing frame is rotatably connected with a nut at the joint of the rod body, and the rod body is in threaded connection with the nut through the external thread.
Optionally, a limiting slide block is fixedly connected to a port of the rod body, a sliding groove is formed in a position, corresponding to the limiting slide block, on the fixing frame, and the limiting slide block is connected in the sliding groove in a sliding mode.
Optionally, through holes corresponding to the number and positions of the rod bodies are formed in the check plate, the rod bodies penetrate through the through holes, and the inner diameter of each through hole is 2-5m larger than the outer diameter of each rod body.
Optionally, at least one annular indentation is formed on the outer wall and the inner wall at equal intervals along the axial direction of the telescopic pipe.
Optionally, the annular indentation is at an angle of 10 ° to 170 °.
Optionally, a ring of annular protrusion is physically disposed on the annular indentation.
Optionally, the inner wall is made of a heat-conducting metal material, and the outer wall is made of a metal heat-insulating composite material.
Optionally, the check plate includes a plate body, tension springs and baffles, at least one opening is formed in the check plate, one side of the opening is hinged to a baffle which is the same as the opening in shape and larger than the opening in size, the other side of the opening is provided with the tension springs for connecting the plate body and the baffles, and the ejector blocks correspond to the number of the openings.
Compared with the prior art, the invention has the following advantages:
the telescopic pipe is arranged in a folding shape, hot gas is retained in the telescopic pipe through the blocking of the check plate, so that heat energy can be more fully utilized, meanwhile, the air in the telescopic pipe is continuously expanded, air pressure is converted into upright mechanical energy of the telescopic pipe, the telescopic pipe is continuously sucked into a fresh water source while being upright, the process is carried out until the check plate is driven by the telescopic pipe to be contacted with the ejector block, so that the air pressure inside and outside the telescopic pipe is communicated, meanwhile, the telescopic pipe is continuously contracted under the action of self gravity, so that liquid in the telescopic pipe is continuously driven to be discharged from the water outlet pipe until the telescopic pipe moves to the lowest position, a cycle is realized, the self-lifting of the telescopic pipe and the self-suction of the liquid in the cavity are realized through the cycle, no additional energy drive is needed, meanwhile, the heat energy of smoke.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the telescoping tube of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention;
FIG. 4 is a partial cross-sectional view of a telescoping tube of the present invention;
FIG. 5 is a schematic view of a telescopic tube according to the present invention.
In the figure: the device comprises a fixing frame 1, a telescopic pipe 2, an outer wall 2a, an inner wall 2b, an annular indentation 2c, an annular protrusion 2d, a water inlet pipe 3, a first check valve 4, a water outlet pipe 5, a second check valve 6, a limiting slide block 7, a check plate 8, a plate body 81, a tension spring 82, a baffle 83, a sliding groove 9, a rod body 10, a nut 11 and a jacking block 12.
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.
Example one
Referring to fig. 1 to 5, the fixing frame 1 includes two rods 10, and in this embodiment, the two rods 10 are symmetrically disposed on the fixing frame 1, and the rods 10 are provided with check plates 8 sliding along the radial direction of the rods 10 within the length of the rods.
Referring to fig. 3, the specific structure of the check plate 8 is as follows:
the check plate 8 comprises a plate body 81, a tension spring 82 and a baffle 83, an opening is formed in the check plate 8, the baffle 83 which is the same as the opening in shape and larger than the opening in size is hinged to one side of the opening, the tension spring 82 for connecting the plate body 81 and the baffle 83 is arranged on the other side of the opening, the top blocks 12 correspond to the opening in number and are all one, in a normal state, the tension spring 82 pulls the baffle 83 to seal the opening, and when the baffle 83 contacts with the top blocks 12, gaps are formed between the baffle 83 and the opening.
In this embodiment, the check plate 8 is provided with two through holes corresponding to the number and positions of the rod bodies 10, the rod bodies 10 penetrate through the through holes, and the inner diameter of each through hole is 2-5cm larger than the outer diameter of each rod body 10, so that the check plate 8 can be slidably connected to the rod bodies 10 through the through holes.
The bottom end of the check plate 8 is connected with the telescopic pipe 2, and one side of the telescopic pipe 2 is sealed by the check plate 8.
The top end of the fixing frame 1 is provided with an ejector block 12, and when the check plate 8 is in contact with the ejector block 12, the check plate 8 is opened.
The pipe wall of the telescopic pipe 2 adopts a double-layer structure, and a cavity is arranged between the pipe walls at two sides of the telescopic pipe 2, which is as follows with reference to fig. 2:
the extension tube 2 is formed by nesting an outer wall 2a and an inner wall 2b, two ends of the outer wall 2a and the inner wall 2b are closed, a closed cavity is formed between the two ends, and liquid or gas media to be heated can be filled in the cavity.
Furthermore, at least one annular indentation 2c is arranged on the outer wall 2a and the inner wall 2b at equal intervals along the axial direction of the telescopic pipe 2, and the annular indentation 2c has the effect that the outer wall 2a and the inner wall 2b can be folded along the annular indentation 2c, so that the axial linear distance of the telescopic pipe can be reduced in the folding process, correspondingly, the surface area of the telescopic pipe 2 in the original height is increased, and the telescopic pipe is more fully contacted with a heat source.
Preferably, said annular indentation 2c has an angle of 10 ° to 170 °, both sides of the angle being foldable along this annular indentation 2c in the range of 10 ° to 170 °.
In the preferred embodiment of the invention, the inner wall 2b is made of a heat-conducting metal material, can be made of copper or aluminum, and has certain bending resistance, and the heat-conducting metal material can better transfer heat to a medium in the cavity because the inner wall 2b is directly contacted with a heat source; the outer wall 2a is made of a metal heat-insulation composite material, for example, the inner layer is made of a firm metal material such as copper and aluminum, the outer layer is made of a heat-insulation material such as asbestos and foamed plastic, and the inner layer and the outer layer are made of the metal heat-insulation composite material, so that the metal heat-insulation composite material has spacing mechanical strength and heat-insulation performance.
Be provided with outlet pipe 5 and inlet tube 3 on the flexible pipe 2, and outlet pipe 5 and inlet tube 3 all communicate with the cavity, install first check valve 4 on the inlet tube 3, install second check valve 6 on the outlet pipe 5, the flow direction of first check valve 4 and second check valve 6 sees the reference numeral of figure 2 or figure 4, and the repeated description is no longer given here.
One end of the extension tube 2, which is far away from the check plate 8, is communicated with an air outlet pipe of the boiler through a pipeline connecting piece such as a flange, the water inlet pipe 3 is communicated with an external water source, and the water outlet pipe 5 is communicated with an external water supply pipe.
Under the normal state, the telescopic pipe 2 is folded along the annular indentation 3 to be in a shrinkage shape under the action of self gravity, the space of the cavity is greatly compressed, hot air generated by the boiler enters from the bottom end of the telescopic pipe 2 and fills the inner space of the telescopic pipe 2, and the other side of the telescopic pipe 2 is blocked by the check plate 8, so that the air cannot be discharged, and only can flow back into the boiler or be continuously gathered in the telescopic pipe 2, thereby effectively prolonging the detention time of the air, meanwhile, the telescopic pipe 2 continuously stands up by the shrinkage shape along with the increase of the air, the space in the cavity is continuously increased in the standing process, negative pressure is generated in the telescopic pipe, and liquid is continuously sent in from the water inlet pipe 3 under the action of the external atmospheric pressure, thereby realizing the filling of a water source in the cavity, and meanwhile, due to the arrangement of the first check valve.
At the initial stage of the movement of the extension tube 2, because the straight line height is lower, the contact area with the smoke in the lower height of the extension tube 2 can be increased through the folding structure, so that no matter the extension tube 2 is folded or erected, the contact area difference between the extension tube and the smoke is not large, and better heating is realized.
Example two
The second embodiment is based on the first embodiment, and further comprises:
the entity of the annular indentation 2c is provided with a circle of annular protrusion 2d, and the arrangement of the annular protrusion 2d increases the length of the annular indentation 2c, so that the annular indentation is more smooth and larger in stress area, and the problem that the traditional corner structure is easy to damage when stressed and gathered at one point is avoided; on the other hand, the extension tube 2 can deform under the action of thermal stress for a long time, so that the annular bulge 2d increases the length of the annular indentation 2c, thereby compensating the length of the extension tube for expansion with heat and contraction with cold and avoiding fracture.
EXAMPLE III
The third embodiment is based on the first embodiment or the second embodiment, and further comprises:
the surface of the rod body 10 is provided with the external screw thread, the mount 1 is gone up and is rotated with the body of rod 10 junction and be connected with nut 11, and the body of rod 10 passes through external screw thread and 11 threaded connection of nut, the port fixedly connected with limit slider 7 of the body of rod 10, spout 9 has been seted up with the position that limit slider 7 corresponds on the mount 1, and limit slider 7 sliding connection is in spout 9, rotates nut 11 and can drive axial displacement from top to bottom of the body of rod 10 to further drive slider 7 and slide on spout 9. When the slide block 7 moves, the lowest movement range of the check plate 8 on the rod body 10 can be reduced or increased, so that the minimum expansion range of the telescopic pipe 2 is increased or reduced, and finally, the adjustment of the lowest residence time of smoke in the telescopic pipe 2 every time and the adjustment of the liquid suction interval of the cavity every time are realized.
Example four
In this embodiment, inlet tube 3 communicates with external gas, and outlet pipe 5 communicates with boiler combustion chamber, and the flue gas after the heating can be sent into boiler combustion chamber and dye formation mist and burn, so can the consumption of the fuel energy of saving by a wide margin.
While the foregoing disclosure shows illustrative embodiments of the invention, it should be noted that various changes and modifications could be made herein without departing from the scope of the invention as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the embodiments of the invention described herein need not be performed in any particular order. Furthermore, although elements of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
Claims (7)
1. The utility model provides an energy-saving flue gas waste heat recovery pipeline, includes mount (1), its characterized in that: the fixing frame (1) is provided with at least one rod body (10), the rod body (10) is provided with a check plate (8) which slides along the radial direction of the rod body in the length direction of the rod body, the bottom end of the check plate (8) is connected with a telescopic pipe (2), and one side of the telescopic pipe (2) is sealed by the check plate (8);
the top end of the fixed frame (1) is provided with a top block (12), and when the check plate (8) is contacted with the top block (12), the check plate (8) is opened;
the pipe wall of the telescopic pipe (2) adopts a double-layer structure, the telescopic pipe (2) is formed by nesting an outer wall (2a) and an inner wall (2b), two ends of the outer wall (2a) and the inner wall (2b) are closed, and a closed cavity is formed between the two ends;
the telescopic pipe (2) is provided with a water outlet pipe (5) and a water inlet pipe (3), the water outlet pipe (5) and the water inlet pipe (3) are both communicated with the cavity, the water inlet pipe (3) is provided with a first check valve (4), and the water outlet pipe (5) is provided with a second check valve (6);
the outer surface of the rod body (10) is provided with external threads, a nut (11) is rotatably connected to the joint of the fixing frame (1) and the rod body (10), and the rod body (10) is in threaded connection with the nut (11) through the external threads;
a limiting sliding block (7) is fixedly connected to a port of the rod body (10), a sliding groove (9) is formed in the position, corresponding to the limiting sliding block (7), on the fixing frame (1), and the limiting sliding block (7) is connected in the sliding groove (9) in a sliding mode;
through holes corresponding to the number and the positions of the rod bodies (10) are formed in the check plate (8), the rod bodies (10) penetrate through the through holes, and the inner diameter of each through hole is 2-5cm larger than the outer diameter of each rod body (10).
2. The energy-saving flue gas waste heat recovery pipeline according to claim 1, wherein the inner wall (2b) is made of heat-conducting metal, and the outer wall (2a) is made of metal heat-insulating composite material.
3. The energy-saving flue gas waste heat recovery pipeline according to claim 1, wherein the outer wall (2a) and the inner wall (2b) are provided with at least one annular indentation (2c) at equal distance along the axial direction of the telescopic pipe (2).
4. The energy-saving flue gas waste heat recovery pipeline according to claim 6, wherein the annular indentation (2c) has an angle of 10-170 °.
5. The energy-saving flue gas waste heat recovery pipeline according to claim 6, wherein a ring of annular protrusions (2d) are arranged on the entity of the annular indentation (2 c).
6. The energy-saving flue gas waste heat recovery pipeline according to claim 1, wherein the check plate (8) comprises a plate body (81), tension springs (82) and baffles (83), at least one opening is formed in the check plate (8), the baffles (83) which are the same in shape as the opening and larger than the opening in size are hinged to one side of the opening, the tension springs (82) connecting the plate body (81) and the baffles (83) are arranged on the other side of the opening, and the number of the top blocks (12) corresponds to the number of the openings.
7. The energy-saving flue gas waste heat recovery pipeline and the method according to any one of claims 1 to 6, characterized in that, in use, the extension pipe (2) is folded along the annular indentation (3) to be contracted under the action of self gravity in normal state, the space of the cavity is greatly compressed, the boiler generates hot gas to enter from the bottom end of the extension pipe (2) and fill the inner space of the extension pipe (2), the other side of the extension pipe (2) is blocked by the check plate (8), the gas cannot be discharged, and therefore the hot gas can only flow back into the boiler or can be continuously gathered in the extension pipe (2), so that the retention time of the gas is effectively prolonged, meanwhile, the extension pipe (2) continuously stands up from the contracted state along with the increase of the gas, the space in the cavity is continuously increased in the standing process, negative pressure is generated in the extension pipe, and the liquid is continuously fed from the water inlet pipe (3) under the action of external atmospheric pressure, therefore, the water source in the cavity is filled, and meanwhile, due to the arrangement of the first check valve (4), liquid cannot flow back into the water inlet pipe (3);
inner wall (2) b is heat conduction metal material, can be quick give the water source with heat transfer, heat it, the diameter and the length of heating time accessible regulation flexible pipe (2) change, the heating lasts to flexible pipe (2) drive check plate (8) and move to kicking block (12) department, under the pressure of kicking block (12), the pressure of gas in flexible pipe (2) and the tension of tension spring (82) are overcome in baffle (83), make baffle (83) open the gap, the inside and outside atmospheric pressure of flexible pipe (2) passes through the continuous balance in gap this moment, flexible pipe (2) continuous shrink under the effect of self gravity simultaneously, the pressure in the process cavity of shrink is greater than external atmospheric pressure, thereby drive liquid in it constantly from outlet pipe (5) discharge, move to the lowest department until flexible pipe (2), realize a circulation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010943615.3A CN112128737A (en) | 2019-08-30 | 2019-08-30 | Energy-saving flue gas waste heat recovery pipeline and method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010943615.3A CN112128737A (en) | 2019-08-30 | 2019-08-30 | Energy-saving flue gas waste heat recovery pipeline and method |
| CN201910817425.4A CN110454773B (en) | 2019-08-30 | 2019-08-30 | Energy-saving flue gas waste heat recovery pipeline |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910817425.4A Division CN110454773B (en) | 2019-08-30 | 2019-08-30 | Energy-saving flue gas waste heat recovery pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112128737A true CN112128737A (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910817425.4A Active CN110454773B (en) | 2019-08-30 | 2019-08-30 | Energy-saving flue gas waste heat recovery pipeline |
| CN202010943615.3A Withdrawn CN112128737A (en) | 2019-08-30 | 2019-08-30 | Energy-saving flue gas waste heat recovery pipeline and method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910817425.4A Active CN110454773B (en) | 2019-08-30 | 2019-08-30 | Energy-saving flue gas waste heat recovery pipeline |
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| CN (2) | CN110454773B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966704B (en) * | 2019-12-19 | 2020-08-28 | 珠海大横琴科技发展有限公司 | Fresh air system |
| CN111811267A (en) * | 2020-05-30 | 2020-10-23 | 宁波海天电炉科技有限公司 | Environment-friendly smoke dust exhausting device of medium-frequency induction furnace |
| CN112742612A (en) * | 2020-12-21 | 2021-05-04 | 宋自球 | Centrifuge is used in oil development with detect function |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2788041Y (en) * | 2005-03-09 | 2006-06-14 | 吴心发 | Telescopic flue |
| FR2966560A1 (en) * | 2010-10-26 | 2012-04-27 | Emmanuelle Lliboutry | Flue pipe for use with stove in residential building, has assembly including cooling and heat recovery system fixed on large central pipe made of metal e.g. stainless steel, where system recovers heat by diffusion |
| CN204484874U (en) * | 2015-03-05 | 2015-07-22 | 湖南省肿瘤医院 | A kind of negative pressure suction head |
| CN106524261B (en) * | 2016-12-12 | 2019-04-05 | 青岛海信电子技术服务有限公司 | A kind of range hood |
| CN207975666U (en) * | 2018-03-21 | 2018-10-16 | 苏州泰高烟囱科技有限公司 | A kind of chimney telescopic compensator |
| CN208920606U (en) * | 2018-07-26 | 2019-05-31 | 辽宁润华热能科技有限公司 | A kind of novel gas wall-hung boiler heat recovery balance flue |
| CN109813143B (en) * | 2019-02-21 | 2020-04-28 | 华中科技大学 | Heat exchanger for flue gas waste heat utilization |
-
2019
- 2019-08-30 CN CN201910817425.4A patent/CN110454773B/en active Active
- 2019-08-30 CN CN202010943615.3A patent/CN112128737A/en not_active Withdrawn
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| Publication number | Publication date |
|---|---|
| CN110454773A (en) | 2019-11-15 |
| CN110454773B (en) | 2020-11-10 |
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Application publication date: 20201225 |
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