CN109595813B - Full-countercurrent dry-burning prevention gas condensing boiler - Google Patents
Full-countercurrent dry-burning prevention gas condensing boiler Download PDFInfo
- Publication number
- CN109595813B CN109595813B CN201910034619.7A CN201910034619A CN109595813B CN 109595813 B CN109595813 B CN 109595813B CN 201910034619 A CN201910034619 A CN 201910034619A CN 109595813 B CN109595813 B CN 109595813B
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- exchange tube
- return heat
- return
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002265 prevention Effects 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000007789 gas Substances 0.000 claims abstract description 23
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims abstract description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 5
- 239000010935 stainless steel Substances 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification 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
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
-
- 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
- F24H9/18—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
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a full-countercurrent dry-burning prevention gas condensing boiler, which is characterized in that: comprises a water inlet (1), a water outlet (4), a plurality of heat exchange pipes (11, 12, 13, 14, 15), a plurality of water collecting areas (5, 6, 7, 8, 9), a gas burner (17), a partition baffle plate (19) and a boiler shell (20). The beneficial effects of the invention are as follows: the temperature of the cold water is increased from bottom to top, so that the self circulation of the water can be realized, and the dry burning of the heat exchange tube is prevented; the heat exchange tube of the outermost ring penetrates through the lower part and the upper part of the heat exchanger, so that the production and the manufacture of the invention are easier; the hot flue gas direction and the water flow direction form full countercurrent, so that the heat exchange efficiency is high; due to the arrangement of the flue gas guide plate, hot flue gas can only flow through the outer wall of the heat exchange tube, so that the heat exchange efficiency is improved; the heat exchanger is divided into an upper part and a lower part, hot flue gas passes through the upper part of the heat exchanger and then passes through the lower part of the heat exchanger, so that the structure is compact, and the occupied space is small; the heat exchange tube is a stainless steel finned tube, and has high heat efficiency and corrosion resistance.
Description
Technical Field
The invention relates to the field of heating of gas boilers, in particular to a full-countercurrent dry-burning prevention gas condensing boiler.
Background
The heat exchange tubes of the existing gas condensing boiler are arranged in the horizontal direction, and when the gas condensing boiler works, if the pressure of the water pump is insufficient or the water pump stops running, the heat exchange tubes are easy to dry-heat, so that the heat exchange tubes are damaged; in addition, the existing gas condensing boiler with vertically arranged heat exchange pipes has the defects of complex structure, large volume and large occupied space.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a full-countercurrent dry-burning prevention gas condensing boiler, which comprises a water inlet, a water outlet, a plurality of heat exchange pipes, a plurality of water collecting areas, a gas burner, a partition baffle plate and a boiler shell, wherein the water inlet is arranged at the lower part of the heat exchanger; the plurality of heat exchange tubes are all vertically arranged fin tubes; the tail ends of the heat exchange tubes are provided with water collecting areas; the heat exchange tubes are sequentially communicated; the partition plate is used for separating the upper part and the lower part of the heat exchanger; the gas burner is arranged at the top of the heat exchanger; the whole device is arranged in the boiler shell; the water outlet is arranged at the extreme end water collecting area.
Preferably, the invention is provided with five return heat exchange tubes, namely a first return heat exchange tube, a second return heat exchange tube, a third return heat exchange tube, a fourth return heat exchange tube and a fifth return heat exchange tube; the water inlet is communicated with the first return heat exchange pipe; the tail end of the first return heat exchange tube is communicated with the first water collecting area; the second water collecting area is respectively communicated with the tail end of the second return heat exchange tube and the beginning end of the third return heat exchange tube; the third water collecting area is respectively communicated with the tail end of the third return heat exchange tube and the beginning end of the fourth return heat exchange tube; the fourth water collecting area is respectively communicated with the tail end of the fourth return heat exchange tube and the beginning end of the fifth return heat exchange tube; the tail end of the fifth return heat exchange tube is communicated with a fifth water collecting area; the fifth water collecting area is communicated with the water outlet; the first return heat exchange tube and the second return heat exchange tube are arranged at the lower part of the heat exchanger; the fourth return heat exchange tube and the fifth return heat exchange tube are arranged at the upper part of the heat exchanger; the third return heat exchange tube penetrates through the lower part and the upper part of the heat exchanger; the first return heat exchange tube, the second return heat exchange tube and the third return heat exchange tube are respectively and uniformly distributed in a round shape, and the diameters of the circles become larger in sequence; the third return heat exchange tube, the fourth return heat exchange tube and the fifth return heat exchange tube are respectively and uniformly distributed in a round shape, and the diameters of the circles are sequentially reduced.
Preferably, a flue gas guide plate is arranged between every two adjacent outermost ring third return heat exchange tubes at the upper part and the lower part of the heat exchanger.
Preferably, the flue gas guide plate is V-shaped, and two sides are tangent to the outermost side of the heat exchange tube respectively.
Preferably, the heat exchange tube is made of stainless steel.
Preferably, the components of the heat exchanger are connected by welding.
The beneficial effects of the invention are as follows: the temperature of the cold water is increased from bottom to top, so that the self circulation of the water can be realized, and the dry burning of the heat exchange tube is prevented; the outermost heat exchange tube penetrates through the lower part and the upper part of the heat exchanger, so that the heat exchange tube is easy to produce and manufacture; the hot flue gas direction and the water flow direction form full countercurrent, so that the heat exchange efficiency is high; due to the arrangement of the flue gas guide plate, hot flue gas can only flow through the outer wall of the heat exchange tube, so that the heat exchange efficiency is improved; the heat exchanger is divided into an upper part and a lower part, hot flue gas passes through the upper part of the heat exchanger and then passes through the lower part of the heat exchanger, so that the structure is compact, and the occupied space is small; the heat exchange tube is a stainless steel finned tube, and has high heat efficiency and corrosion resistance.
Drawings
Fig. 1 is a schematic view of the overall structure of the device of the present invention.
Fig. 2 is a front view of the heat exchanger of the present invention.
Fig. 3 is a cross-sectional view taken along the direction a in fig. 2.
Fig. 4 is a sectional view taken along the direction B in fig. 3.
Fig. 5 is a cross-sectional view taken along direction C in fig. 3.
The components in the drawings are marked as follows: a water inlet 1; a water outlet 4; a first water collection zone 5; a second water collection zone 6; a third water collection zone 7; a fourth water collection zone 8; a fifth water collection zone 9; a first return heat exchange tube 11; a second return heat exchange tube 12; a third return heat exchange tube 13; a fourth return heat exchange tube 14; a fifth return heat exchange tube 15; a gas burner 17; a flue gas deflector 18; partition plate 19; a boiler housing 20; hot flue gas 21; water flow 22.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and unambiguous the scope of the present invention.
Referring to the accompanying drawings 1-5, the invention discloses a full-countercurrent dry-burning prevention gas condensing boiler, which comprises a water inlet 1, a water outlet 4, a plurality of heat exchange pipes 11, 12, 13, 14, 15, a plurality of water collecting areas 5, 6, 7, 8 and 9, a gas burner 17, a partition baffle 19 and a boiler shell 20, wherein the water inlet 1 is arranged at the lower part of a heat exchanger; the plurality of heat exchange tubes 11, 12, 13, 14, 15 are all vertically arranged fin tubes; the tail ends of the heat exchange tubes 11, 12, 13, 14 and 15 are respectively provided with a water collecting area 5, 6, 7, 8 and 9; the heat exchange tubes 11, 12, 13, 14 and 15 are sequentially communicated; the partition plate 19 is used for separating the upper part and the lower part of the heat exchanger; the gas burner 17 is arranged at the top of the heat exchanger; the entire device is placed inside the boiler housing 20; the water outlet 4 is arranged in the endmost water collecting area 9.
The invention is provided with five return heat exchange tubes, namely a first return heat exchange tube 11, a second return heat exchange tube 12, a third return heat exchange tube 13, a fourth return heat exchange tube 14 and a fifth return heat exchange tube 15; the water inlet 1 is communicated with the first return heat exchange tube 11; the tail end of the first return heat exchange tube 11 is communicated with the first water collecting area 5; the second water collecting area 6 is respectively communicated with the tail end of the second return heat exchange tube 12 and the beginning end of the third return heat exchange tube 13; the third water collecting area 7 is respectively communicated with the tail end of the third return heat exchange tube 13 and the beginning end of the fourth return heat exchange tube 14; the fourth water collecting area 8 is respectively communicated with the tail end of the fourth return heat exchange tube 14 and the beginning end of the fifth return heat exchange tube 15; the tail end of the fifth return heat exchange tube 15 is communicated with the fifth water collecting area 9; the fifth water collecting area 9 is communicated with the water outlet 4; the first return heat exchange tube 11 and the second return heat exchange tube 12 are arranged at the lower part of the heat exchanger; the fourth return heat exchange tube 14 and the fifth return heat exchange tube 15 are arranged at the upper part of the heat exchanger; the third return heat exchange tube 13 penetrates through the lower part and the upper part of the heat exchanger; the first return heat exchange tube 11, the second return heat exchange tube 12 and the third return heat exchange tube 13 are respectively and uniformly distributed in a circular shape, and the diameters of the circles become larger in sequence; the third return heat exchange tube 13, the fourth return heat exchange tube 14 and the fifth return heat exchange tube 15 are respectively and uniformly distributed in a circular shape, and the diameters of the circles are sequentially reduced.
A flue gas deflector 18 is arranged between every two adjacent outermost ring of the third return heat exchange tubes 13 at the upper part and the lower part of the heat exchanger.
The flue gas guide plate 18 is V-shaped, and two sides of the flue gas guide plate are tangent to the outermost side of the heat exchange tube 13.
The heat exchange tubes 11, 12, 13, 14 and 15 are made of stainless steel.
All components of the heat exchanger are connected in a welding mode.
The working principle of the invention is as follows: the gas burner 17 of the gas condensing boiler is arranged at the top of the heat exchanger, the generated hot flue gas 21 passes through the fifth return heat exchange tube 15, the fourth return heat exchange tube 14, the third return heat exchange tube 13, the second return heat exchange tube 12 and the outer wall of the first return heat exchange tube 11 respectively, and the water flow 22 passes through the water inlet 1, then passes through the first return heat exchange tube 11, the first water collecting area 5, the second return heat exchange tube 12, the second water collecting area 6, the third return heat exchange tube 13, the third water collecting area 7, the fourth return heat exchange tube 14, the fourth water collecting area 8, the fifth return heat exchange tube 15 and the fifth water collecting area 9 respectively, the water temperature is gradually increased, and finally flows out from the water outlet 4 to be connected into a corresponding heating system.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A full countercurrent dry combustion preventing gas condensing boiler is characterized in that: the device comprises a water inlet (1), a water outlet (4), a plurality of heat exchange pipes (11, 12, 13, 14, 15), a plurality of water collecting areas (5, 6, 7, 8, 9), a gas burner (17), a partition baffle plate (19) and a boiler shell (20), wherein the water inlet (1) is arranged at the lower part of the heat exchanger; the plurality of heat exchange tubes (11, 12, 13, 14, 15) are all vertically arranged fin tubes; the tail ends of the heat exchange tubes (11, 12, 13, 14, 15) are respectively provided with a water collecting area (5, 6, 7, 8, 9); the heat exchange tubes (11, 12, 13, 14, 15) are sequentially communicated; the partition plate (19) is used for separating the upper part and the lower part of the heat exchanger; the gas burner (17) is arranged at the top of the heat exchanger; the whole device is arranged in the boiler shell (20); the water outlet (4) is arranged in the tail-most water collecting area (9); five return heat exchange tubes are arranged, namely a first return heat exchange tube (11), a second return heat exchange tube (12), a third return heat exchange tube (13), a fourth return heat exchange tube (14) and a fifth return heat exchange tube (15); the water inlet (1) is communicated with the first return heat exchange tube (11); the tail end of the first return heat exchange tube (11) is communicated with the first water collecting area (5); the second water collecting area (6) is respectively communicated with the tail end of the second return heat exchange tube (12) and the beginning end of the third return heat exchange tube (13); the third water collecting area (7) is respectively communicated with the tail end of the third return heat exchange tube (13) and the beginning end of the fourth return heat exchange tube (14); the fourth water collecting area (8) is respectively communicated with the tail end of the fourth return heat exchange tube (14) and the beginning end of the fifth return heat exchange tube (15); the tail end of the fifth return heat exchange tube (15) is communicated with the fifth water collecting area (9); the fifth water collecting area (9) is communicated with the water outlet (4); the first return heat exchange tube (11) and the second return heat exchange tube (12) are arranged at the lower part of the heat exchanger; the fourth return heat exchange tube (14) and the fifth return heat exchange tube (15) are arranged at the upper part of the heat exchanger; the third return heat exchange tube (13) penetrates through the lower part and the upper part of the heat exchanger; the first return heat exchange tube (11), the second return heat exchange tube (12) and the third return heat exchange tube (13) are respectively and uniformly distributed in a circular shape, and the diameters of the circles become larger in sequence; the third return heat exchange tube (13), the fourth return heat exchange tube (14) and the fifth return heat exchange tube (15) are respectively and uniformly distributed in a circular shape, and the diameters of the circles are sequentially reduced; a flue gas guide plate (18) is arranged between every two adjacent outermost ring third return heat exchange tubes (13) at the upper part and the lower part of the heat exchanger.
2. The full-countercurrent dry-combustion-preventing gas condensing boiler of claim 1, wherein: the flue gas guide plate (18) is V-shaped, and two sides of the flue gas guide plate are tangent to the outermost side of the heat exchange tube (13).
3. The full-countercurrent dry-combustion-preventing gas condensing boiler of claim 1, wherein: the heat exchange tubes (11, 12, 13, 14, 15) are made of stainless steel.
4. A full-counterflow dry combustion preventing gas condensing boiler according to claim 3, characterized in that: all components of the heat exchanger are connected in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910034619.7A CN109595813B (en) | 2019-01-15 | 2019-01-15 | Full-countercurrent dry-burning prevention gas condensing boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910034619.7A CN109595813B (en) | 2019-01-15 | 2019-01-15 | Full-countercurrent dry-burning prevention gas condensing boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109595813A CN109595813A (en) | 2019-04-09 |
| CN109595813B true CN109595813B (en) | 2023-11-24 |
Family
ID=65966229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910034619.7A Active CN109595813B (en) | 2019-01-15 | 2019-01-15 | Full-countercurrent dry-burning prevention gas condensing boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109595813B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2052696A (en) * | 1979-06-26 | 1981-01-28 | Ebara Corp | Boiler |
| EP0262274A1 (en) * | 1986-09-22 | 1988-04-06 | Emile Percevaut | Recuperator of heat from flue gases from different furnaces capable of cleaning these gases |
| EP0271434A2 (en) * | 1986-12-06 | 1988-06-15 | Joh. Vaillant GmbH u. Co. | Steel boiler |
| KR200237735Y1 (en) * | 2000-12-27 | 2001-09-29 | 주식회사 두발가스엔지니어링 | A body heat exchanger of condensing gas boiler |
| CN201637114U (en) * | 2010-04-19 | 2010-11-17 | 薛晶 | Plate box type smoke condenser |
| CN202928080U (en) * | 2012-11-07 | 2013-05-08 | 青海聚合热力有限责任公司 | Vertical type hot water boiler |
| CN104791998A (en) * | 2015-03-26 | 2015-07-22 | 重庆太湖锅炉股份有限公司 | Vertical three-pass hot-water boiler |
| CN205332212U (en) * | 2016-02-17 | 2016-06-22 | 北京葆蓝科技有限公司 | Low nitrogen fine copper boiler of full premix of four return stroke structures |
| CN107514809A (en) * | 2017-09-14 | 2017-12-26 | 广西节得乐生物质能源科技有限公司 | A kind of hot air heat exchanger of biomass combustion equipment |
| CN209431671U (en) * | 2019-01-15 | 2019-09-24 | 临沂市欧科节能技术有限公司 | A kind of full adverse current anti-dry gas-fired condensing boiler |
-
2019
- 2019-01-15 CN CN201910034619.7A patent/CN109595813B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2052696A (en) * | 1979-06-26 | 1981-01-28 | Ebara Corp | Boiler |
| EP0262274A1 (en) * | 1986-09-22 | 1988-04-06 | Emile Percevaut | Recuperator of heat from flue gases from different furnaces capable of cleaning these gases |
| EP0271434A2 (en) * | 1986-12-06 | 1988-06-15 | Joh. Vaillant GmbH u. Co. | Steel boiler |
| KR200237735Y1 (en) * | 2000-12-27 | 2001-09-29 | 주식회사 두발가스엔지니어링 | A body heat exchanger of condensing gas boiler |
| CN201637114U (en) * | 2010-04-19 | 2010-11-17 | 薛晶 | Plate box type smoke condenser |
| CN202928080U (en) * | 2012-11-07 | 2013-05-08 | 青海聚合热力有限责任公司 | Vertical type hot water boiler |
| CN104791998A (en) * | 2015-03-26 | 2015-07-22 | 重庆太湖锅炉股份有限公司 | Vertical three-pass hot-water boiler |
| CN205332212U (en) * | 2016-02-17 | 2016-06-22 | 北京葆蓝科技有限公司 | Low nitrogen fine copper boiler of full premix of four return stroke structures |
| CN107514809A (en) * | 2017-09-14 | 2017-12-26 | 广西节得乐生物质能源科技有限公司 | A kind of hot air heat exchanger of biomass combustion equipment |
| CN209431671U (en) * | 2019-01-15 | 2019-09-24 | 临沂市欧科节能技术有限公司 | A kind of full adverse current anti-dry gas-fired condensing boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109595813A (en) | 2019-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102901221B (en) | A kind of pressure fin straight pipe condensation Heat supply and heat exchange device | |
| CN102901222B (en) | A kind of pressure fin straight tube double-ring condensation Heat supply and heat exchange device | |
| CN102901225B (en) | A kind of pressure helical fin coil condensation Heat supply and heat exchange device | |
| CN101782270A (en) | Condensing gas boiler | |
| CN104251629A (en) | Heat exchanger and gas water heater with same | |
| CN106500318A (en) | A kind of built-in water-fire pipe gas-steam boiler of condenser | |
| CN104019552B (en) | A kind of combustion gas angle pipe hot water boiler water circulation structure | |
| CN109595813B (en) | Full-countercurrent dry-burning prevention gas condensing boiler | |
| CN205373463U (en) | Double tube-sheet heat exchanger to prevent cross-contamination | |
| CN201014753Y (en) | Condensing heat converter | |
| RU2386905C1 (en) | Heat generator | |
| CN203880946U (en) | Novel water circulation structure of gas angular tube hot water boiler | |
| CN217236506U (en) | Vertical low-carbon condensation energy-saving device | |
| KR200284927Y1 (en) | High Efficiency Heat Recovery Apparatus | |
| CN216770239U (en) | Finned tube type condensation heat exchanger for wall-mounted furnace | |
| CN201615608U (en) | Condensing gas-fired boiler | |
| CN212409075U (en) | Water heating device | |
| CN209431671U (en) | A kind of full adverse current anti-dry gas-fired condensing boiler | |
| CN105066437B (en) | The complete wet back of the body central flame flame boiler of integral type | |
| CN202709457U (en) | Two-stage condensing heat exchanger | |
| CN206386908U (en) | A kind of compact energy-saving type water-fire pipe gas-steam boiler | |
| CN208653292U (en) | A kind of cast aluminium heat exchanger equipped with heating column | |
| CN212962884U (en) | Propylene torch gas heater | |
| CN218565397U (en) | Single-return-stroke water pipe steam boiler structure | |
| RU200074U1 (en) | HEAT EXCHANGER FOR WATER BOILER |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |