CN109442748A - The assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave - Google Patents
The assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave Download PDFInfo
- Publication number
- CN109442748A CN109442748A CN201811127686.5A CN201811127686A CN109442748A CN 109442748 A CN109442748 A CN 109442748A CN 201811127686 A CN201811127686 A CN 201811127686A CN 109442748 A CN109442748 A CN 109442748A
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- Prior art keywords
- tube
- heat exchange
- heat transfer
- assisted
- pulsating
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000007789 gas Substances 0.000 claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 claims abstract description 30
- 239000003345 natural gas Substances 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 2
- 238000011084 recovery Methods 0.000 claims 2
- 239000000428 dust Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 230000010349 pulsation Effects 0.000 claims 1
- 230000009172 bursting Effects 0.000 abstract 1
- 238000013021 overheating Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 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
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/0042—Cleaning arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
本发明涉及一种脉动燃烧式超声波辅助强化传热锅炉，脉动燃烧系统包括气体混合室及脉动燃烧器，气体混合室上分别连接有空气进气管及天然气进气管；换热器上设置有若干直管换热管、液体进口、液体出口、混合气进口、混合气出口、液体进口管板及冷凝水排水口，液体进口连接液体进口管板，液体进口管板及液体出口之间并联连接若干直管换热管；脉动燃烧器的火焰喷嘴连接至混合气进口，混合气出口连接有烟囱；超声波辅助强化传热系统包括超声换能器及调压器，超声换能器连接至调压器。本发明结构设计科学合理，不仅能够解决锅炉结垢、水冷壁管、拱管爆管及锅筒下部过热鼓包问题；同时还可以提高天然气的燃烧效率，节约能源，提高换热效率。
The invention relates to a pulsating combustion type ultrasonic-assisted enhanced heat transfer boiler. The pulsating combustion system includes a gas mixing chamber and a pulsating burner. The gas mixing chamber is respectively connected with an air intake pipe and a natural gas intake pipe; Tube heat exchange tube, liquid inlet, liquid outlet, mixed gas inlet, mixed gas outlet, liquid inlet tube sheet and condensate drain outlet, the liquid inlet is connected to the liquid inlet tube sheet, and the liquid inlet tube sheet and the liquid outlet are connected in parallel with several straight pipes. tube heat exchange tube; the flame nozzle of the pulsating burner is connected to the mixed gas inlet, and the mixed gas outlet is connected with a chimney; the ultrasonic-assisted enhanced heat transfer system includes an ultrasonic transducer and a pressure regulator, and the ultrasonic transducer is connected to the pressure regulator. The invention has a scientific and reasonable structure design, which can not only solve the problems of boiler scaling, water-cooled wall tubes, arch tubes bursting and overheating bulging at the lower part of the drum, but also can improve the combustion efficiency of natural gas, save energy and improve heat exchange efficiency.
Description
Technical field
The invention belongs to art of heat transfer, are related to strengthening and heat transferring device, in particular to a kind of pulsating burning ultrasonic wave is auxiliary
Help augmentation of heat transfer boiler.
Background technique
Boiler is a kind of energy conversion, can convert steam, height for the chemical energy inputted into boiler, electric energy etc.
The output of warm water energy thermal energy.The hot water or steam generated in boiler directly can provide required thermal energy for industrial production and people's lives,
Mechanical energy can also be converted to by Steam Power Equipment, or electric energy is converted mechanical energy by generator again.Hot water is provided
Boiler is known as hot-water boiler, is mainly used for living, and also has a small amount of application in industrial production.
In the process of running, there may be secondary scales when grain slag accumulates to a certain concentration, corresponding low for hot-water boiler
Under flow velocity and concentration conditions, deposition will form thicker scale to grain slag for a long time, if cannot be purged in time to scale, have
It may cause the danger such as water screen tube, arch tube booster and the overheat bulge of drum lower part, will seriously affect the actual motion of boiler
Efficiency and quality.
In addition, coal-burning boiler generates volume of smoke when running, very big pollution is caused to environment, and natural gas is cleaning energy
Source is greatly improved to environment.And the conveying of gas fired-boiler fuel and other ancillary equipments are few, and power is small, when continuous operation
Between it is short, so power consumption is low, expense is relatively saved.Therefore, gas fired-boiler has more advantages than traditional coal-burning boiler, uses combustion
Gas boiler is safe and convenient, can also improve air quality.In addition, the early-stage study of this seminar is found, by natural gas boiler
Direct burning be changed to intermittent combustion mode, combustion gas can be made more fully to burn, dramatically increase heat burst size, save energy
Source.Therefore, the present invention invents a kind of assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave based on gas fired-boiler.
By the retrieval to patent document, patent document identical with present patent application is not found.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of assisted and strengthened biographies of pulsating burning ultrasonic wave
Heat boiler is able to solve the problems such as boiler fouling, water screen tube, arch tube booster and drum lower part overheat bulge, while improving day
The efficiency of combustion of right gas, it is energy saving.
The present invention solves its technical problem and is achieved through the following technical solutions:
A kind of assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave, it is characterised in that: including bracket and be mounted on bracket
On pulse combustion system, heat exchanger and the assisted and strengthened heat transfer system of ultrasonic wave, the pulse combustion system include gas mixing
Room and pulsating combusting device are connected separately with air intake duct and natural gas air inlet pipe on the gas mixer chamber；The heat exchanger
On be provided with several straight tube heat exchanger tubes, liquid-inlet, liquid outlet, combi inlet port, mixed gas outlet, liquid-inlet tube sheet and
Condensate water discharging mouth, the liquid-inlet connect the liquid-inlet tube sheet, the liquid-inlet tube sheet and the liquid outlet
Between be connected in parallel several straight tube heat exchanger tubes；The flame-thrower nozzle of the pulsating combusting device is connected to the combi inlet port,
The mixed gas outlet is connected with chimney；The assisted and strengthened heat transfer system of ultrasonic wave includes ultrasonic transducer and pressure regulator, institute
It states ultrasonic transducer and is mounted on the heat exchanger bottom end, the ultrasonic transducer is connected to the pressure regulator by conducting wire.
Moreover, further including residual neat recovering system, the residual neat recovering system includes interior heat exchange tube and outer heat exchange tube, institute
It states and is connected between interior heat exchange tube and outer heat exchange tube by U-tube, said inner tube tube end is connected to described several straight
Heat exchange tube, the outer tube tube end are connected to the liquid-inlet tube sheet.
Moreover, being provided with partition between several straight tube heat exchanger tubes.
Moreover, being provided with several fins on said inner tube heat exchanger tube and outer heat exchange tube outer wall.
Moreover, being provided with electromagnetic flowmeter in the air intake duct and natural gas air inlet pipe.
Moreover, being provided with deduster on the air intake duct.
Moreover, the air intake duct and the gas flow ratio of the natural gas air inlet pipe are 1.08~1.45.
Moreover, the draw ratio of the pulsating combusting device is greater than 15.
Moreover, being provided with insulating layer outside the heat exchanger.
The advantages and benefits of the present invention are:
1, the assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave of the invention is connected separately with air on gas mixer chamber
Air inlet pipe and natural gas air inlet pipe；Be provided on heat exchanger several straight tube heat exchanger tubes, liquid-inlet, liquid outlet, gaseous mixture into
Mouth, mixed gas outlet, liquid-inlet tube sheet and condensate water discharging mouth, liquid-inlet connect the liquid-inlet tube sheet, liquid into
Several straight tube heat exchanger tubes are connected in parallel between mouth tube sheet and liquid outlet；The flame-thrower nozzle of pulsating combusting device is connected to mixing
Gas import, mixed gas outlet are connected with chimney；The assisted and strengthened heat transfer system of ultrasonic wave includes ultrasonic transducer and pressure regulator, ultrasound
Energy converter is mounted on heat exchanger bottom end, and ultrasonic transducer is connected to pressure regulator by conducting wire, can be significant using intermittent combustion mode
The efficiency of combustion of natural gas is improved, about 20% is improved, the usage amount of natural gas can be reduced, it is energy saving, using intermittent combustion side
Formula can effectively reduce the discharge amount of NOx；Meanwhile ultrasonic transducer can effectively prevent scale to be formed on heat transfer tube wall face, increase
Add the coefficient of heat transfer, while preventing the corrosiveness of scale heat exchanging device, the prolonged boiler service life；The vertical effect of impulsing of ultrasonic wave,
It is remarkably improved the less turbulence of heat transferring medium in heat exchanger tube, increases the heat transfer intensity of heat transferring medium and tube wall, improves heat exchange effect
Rate.
2, the assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave of the invention, further includes residual neat recovering system, and waste heat returns
Receipts system includes interior heat exchange tube and outer heat exchange tube, is connected between interior heat exchange tube and outer heat exchange tube by U-tube, inner tube
Tube end is connected to several straight tube heat exchanger tubes, and outer tube tube end is connected to liquid-inlet tube sheet, can further return
Tail gas heat quantity is received, heat exchange is reinforced, improves heat exchange efficiency, realizes that the energy makes full use of.
3, the assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave of the invention, be provided between several straight tube heat exchanger tubes every
Plate reinforces heat exchange area, improves heat exchange efficiency.
4, the assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave of the invention, interior heat exchange tube and outer heat exchange tube outer wall
On be provided with several fins, reinforce tail gas turbulence, improve the contact area of tail gas and heat exchanger tube, guarantee sufficiently heat exchange.
5, the assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave of the invention, on air intake duct and natural gas air inlet pipe
It is provided with electromagnetic flowmeter, accurately controls the flow of air and natural gas, guarantees burning heat supply.
6, the assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave of the invention is provided with deduster on air intake duct,
Impurity can be reduced to bring into, guarantee full combustion.
7, the assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave of the invention, air intake duct and natural gas air inlet pipe
Gas flow ratio is 1.08~1.45, and the draw ratio of pulsating combusting device is greater than 15, improves efficiency of combustion, guarantees heat transfer effect.
8, design is scientific and reasonable for structure of the invention, can not only solve boiler fouling, water screen tube, arch tube booster and drum
Lower part overheats bulge problem；The efficiency of combustion of natural gas can also be improved simultaneously, it is energy saving, improve heat exchange efficiency.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Description of symbols
1- natural gas air inlet pipe, 2- natural gas electromagnetic flowmeter, 3- gas mixer chamber, 4- deduster, 5- air electromagnetic current
Meter, 6- air intake duct, 7- pulsating combusting device, 8- flame-thrower nozzle, 9-U type pipe, 10- partition, 11- straight tube heat exchanger tube, in 12-
Heat exchange tube, 13- fin, 14- outer heat exchange tube, 15- pressure regulator, 16- liquid-inlet, 17- ultrasonic transducer, 18- condensed water
Discharge outlet, 19- bracket, 20- liquid-inlet tube sheet, 21- insulating layer, 22- mixed gas outlet, 23- chimney, 24- heat exchanger, 25-
Liquid outlet.
Specific embodiment
Below by specific embodiment, the invention will be further described, and it is not limit that following embodiment, which is descriptive,
Qualitatively, this does not limit the scope of protection of the present invention.
A kind of assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave, innovation are: including bracket 19 and installation
Pulse combustion system, heat exchanger 24 and the assisted and strengthened heat transfer system of ultrasonic wave, pulse combustion system on bracket include gas
Mixing chamber 3 and pulsating combusting device 7 are connected separately with air intake duct 6 and natural gas air inlet pipe 1 on gas mixer chamber；Heat exchanger
On be provided with several straight tube heat exchanger tubes 11, liquid-inlet 16, liquid outlet 25, combi inlet port, mixed gas outlet 22, liquid into
Mouth tube sheet 20 and condensate water discharging mouth 18, liquid-inlet connects liquid-inlet tube sheet, between liquid-inlet tube sheet and liquid outlet
It is connected in parallel several straight tube heat exchanger tubes；The flame-thrower nozzle 8 of pulsating combusting device is connected to combi inlet port, and mixed gas outlet is connected with
Chimney 23；The assisted and strengthened heat transfer system of ultrasonic wave includes ultrasonic transducer 17 and pressure regulator 15, and ultrasonic transducer is mounted on heat exchange
Device bottom end, ultrasonic transducer are connected to pressure regulator by conducting wire, and the burning of natural gas is remarkably improved using intermittent combustion mode
Efficiency improves about 20%, can reduce the usage amount of natural gas, energy saving, can effectively reduce NOx's using intermittent combustion mode
Discharge amount；Meanwhile ultrasonic transducer can effectively prevent scale to be formed on heat transfer tube wall face, increase the coefficient of heat transfer, prevent simultaneously
The corrosiveness of sealing dirt heat exchanging device, prolonged boiler service life；The vertical effect of impulsing of ultrasonic wave, is remarkably improved in heat exchanger tube
The less turbulence of heat transferring medium increases the heat transfer intensity of heat transferring medium and tube wall, improves heat exchange efficiency.
It further include residual neat recovering system, residual neat recovering system includes interior heat exchange tube 12 and outer heat exchange tube 14, and inner tube is changed
It is connected between heat pipe and outer heat exchange tube by U-tube 9, inner tube tube end is connected to several straight tube heat exchanger tubes, and outer tube changes
Heat pipe end is connected to liquid-inlet tube sheet, can further recycle tail gas heat quantity, reinforces heat exchange, improves heat exchange efficiency, realizes
The energy makes full use of.
It is provided with partition 10 between several straight tube heat exchanger tubes, reinforces heat exchange area, improves heat exchange efficiency.
Be provided with several fins 13 on interior heat exchange tube and outer heat exchange tube outer wall, reinforce tail gas turbulence, improve tail gas with
The contact area of heat exchanger tube guarantees sufficiently heat exchange.
It is provided with air electromagnetic flowmeter 5 on air intake duct, natural gas Electromagnetic Flow is provided in natural gas air inlet pipe
Meter 2 accurately controls the flow of air and natural gas, guarantees burning heat supply.
It is provided with deduster 4 on air intake duct, impurity can be reduced and brought into, guarantees full combustion.
Air intake duct and the gas flow ratio of natural gas air inlet pipe are 1.08~1.45, and the draw ratio of pulsating combusting device is big
In 15, efficiency of combustion is improved, guarantees heat transfer effect.
It is provided with insulating layer 21 outside heat exchanger, prevents thermal loss, improves heat transfer effect.
Though the present invention discloses embodiment and attached drawing, it will be appreciated by those skilled in the art that: do not departing from this hair
In bright and spirit and scope of the appended claims, various substitutions, changes and modifications be all it is possible, therefore, model of the invention
It encloses and is not limited to the embodiment and attached drawing disclosure of that.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127686.5A CN109442748A (en) | 2018-09-27 | 2018-09-27 | The assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127686.5A CN109442748A (en) | 2018-09-27 | 2018-09-27 | The assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109442748A true CN109442748A (en) | 2019-03-08 |
Family
ID=65544364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811127686.5A Pending CN109442748A (en) | 2018-09-27 | 2018-09-27 | The assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109442748A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132041A (en) * | 2019-06-17 | 2019-08-16 | 周清桂 | A kind of heat exchanger |
| CN114353319A (en) * | 2022-01-14 | 2022-04-15 | 遵义朝宇锅炉有限公司 | Clear stifled device and boiler equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2186375Y (en) * | 1994-03-30 | 1994-12-28 | 北京航空航天大学 | Pulsating burning hot-water, steam mini-boiler |
| CN1369053A (en) * | 1999-07-14 | 2002-09-11 | 控制工程学公司 | Ultrosonic cleaning method |
| CN202141195U (en) * | 2011-07-05 | 2012-02-08 | 浙江上能锅炉有限公司 | Vacuum hot water boiler with waste heat recycling device |
| CN204140172U (en) * | 2014-09-17 | 2015-02-04 | 重庆耐德能源装备集成有限公司 | A kind of natural gas liquefaction pretreatment system |
| CN204874383U (en) * | 2015-07-14 | 2015-12-16 | 河南农业大学 | Take retort of waste heat recovery function |
| CN106767042A (en) * | 2016-12-30 | 2017-05-31 | 南京师范大学 | Intensified by ultrasonic wave spirality micro-channel descaling heat exchanger |
| CN209197132U (en) * | 2018-09-27 | 2019-08-02 | 天津科技大学 | A kind of assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave |
-
2018
- 2018-09-27 CN CN201811127686.5A patent/CN109442748A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2186375Y (en) * | 1994-03-30 | 1994-12-28 | 北京航空航天大学 | Pulsating burning hot-water, steam mini-boiler |
| CN1369053A (en) * | 1999-07-14 | 2002-09-11 | 控制工程学公司 | Ultrosonic cleaning method |
| CN202141195U (en) * | 2011-07-05 | 2012-02-08 | 浙江上能锅炉有限公司 | Vacuum hot water boiler with waste heat recycling device |
| CN204140172U (en) * | 2014-09-17 | 2015-02-04 | 重庆耐德能源装备集成有限公司 | A kind of natural gas liquefaction pretreatment system |
| CN204874383U (en) * | 2015-07-14 | 2015-12-16 | 河南农业大学 | Take retort of waste heat recovery function |
| CN106767042A (en) * | 2016-12-30 | 2017-05-31 | 南京师范大学 | Intensified by ultrasonic wave spirality micro-channel descaling heat exchanger |
| CN209197132U (en) * | 2018-09-27 | 2019-08-02 | 天津科技大学 | A kind of assisted and strengthened heat transfer boiler of pulsating burning ultrasonic wave |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132041A (en) * | 2019-06-17 | 2019-08-16 | 周清桂 | A kind of heat exchanger |
| CN114353319A (en) * | 2022-01-14 | 2022-04-15 | 遵义朝宇锅炉有限公司 | Clear stifled device and boiler equipment |
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Application publication date: 20190308 |