CN106524512B - Condensation type internal combustion multi-return boiler - Google Patents

Condensation type internal combustion multi-return boiler Download PDF

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Publication number
CN106524512B
CN106524512B CN201611162874.2A CN201611162874A CN106524512B CN 106524512 B CN106524512 B CN 106524512B CN 201611162874 A CN201611162874 A CN 201611162874A CN 106524512 B CN106524512 B CN 106524512B
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flue
heat absorbing
absorbing sheets
boiler
water
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CN106524512A (en
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杨文程
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    • 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
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
    • F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B1/00—Stoves or ranges
    • F24B1/18—Stoves with open fires, e.g. fireplaces
    • F24B1/183—Stoves with open fires, e.g. fireplaces with additional provisions for heating water
    • 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
    • F24H9/0036—Dispositions against condensation of combustion products
    • 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
    • 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]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Supply (AREA)

Abstract

The invention discloses a condensing internal combustion multi-return-stroke boiler. The technical scheme of the product comprises a shell and a furnace body arranged in the shell, wherein a combustion chamber, a return heated chamber and a condensation flue are arranged in the furnace body, a fire grate is arranged at the inlet of the combustion chamber, transverse heat absorbing sheets and vertical heat absorbing sheets are arranged in the return heated chamber, the vertical heat absorbing sheets are clamped between two rows of the transverse heat absorbing sheets, the transverse heat absorbing sheets are separated to form a gap flue, the lower layer of the gap flue and the upper layer of the gap flue are mutually staggered, and the gap flue is communicated with the condensation flue; the furnace body wall is a water cavity wall, the water cavity wall is communicated with the transverse heat absorption sheet and the vertical heat absorption sheet, a water inlet is formed in the bottom of the water cavity wall, a water outlet is formed in the top of the water cavity wall, and the water outlet is communicated with an external facility. The heat absorbing sheets in the technical scheme are arranged, so that the heat absorbing area is large, the heating area is increased, water scale is not easily generated in water heating circulation, the service life of the boiler is prolonged, and the heat efficiency is increased by 15%.

Description

Condensation type internal combustion multi-return boiler
Technical Field
The invention belongs to the field of gas appliances, and relates to a boiler, in particular to a condensing type internal combustion multi-return boiler.
Background
With the development of science and technology, people have higher living standard, and heating equipment such as a gas boiler is widely used. Existing condensing boilers recover heat from flue gas by condensing it. The flue gas is along predetermineeing the flue motion, with arrange the heat exchange tube uniform contact in the flue, but this type of product makes the combustor extinguish easily when the comdenstion water generates, and the comdenstion water can't be discharged, forms the water film on the heat exchange tube surface easily, hinders the heat transfer, corrodes the furnace body and shortens boiler life, reduces thermal efficiency. In addition, the existing condensing gas furnace has the defect of overlarge working sound.
Disclosure of Invention
The invention aims to provide a condensing internal combustion multi-return boiler which adopts a return back combustion principle, is energy-saving and environment-friendly, increases the smoke return and hydrodynamic circulation in a furnace chamber by using a furnace type structure, has a large furnace type heating surface, improves the heat efficiency and reduces the smoke exhaust temperature.
In order to achieve the purpose, the invention provides a condensing type internal combustion multi-return-stroke boiler which comprises a shell and a boiler body arranged in the shell, wherein a combustion chamber, a return heat receiving chamber and a condensing flue are arranged in the boiler body, a fire grate is arranged at the inlet of the combustion chamber, transverse heat absorbing sheets and vertical heat absorbing sheets are distributed in the return heat receiving chamber, the vertical heat absorbing sheets are clamped between two rows of transverse heat absorbing sheets, a gap flue is formed by separating the transverse heat absorbing sheets, the lower layer of the gap flue and the upper layer of the gap flue are arranged in a staggered mode, and the gap flue is communicated with the condensing flue; the wall of the furnace body is a water cavity wall, and the water cavity wall is communicated with the transverse heat absorbing sheet and the vertical heat absorbing sheet; the bottom of the water cavity wall is provided with a water inlet, the top of the water cavity wall is provided with a water outlet, and the water outlet is communicated with external facilities.
Horizontal heat absorbing sheets and vertical heat absorbing sheets are arranged in the return heating chamber, the vertical heat absorbing sheets are clamped between the two rows of the horizontal heat absorbing sheets, gap flues are formed by the horizontal heat absorbing sheets in a spaced mode, the lower layers of the gap flues and the upper layers of the gap flues are arranged in a staggered mode, smoke circularly flows from gaps of the horizontal heat absorbing sheets and the vertical heat absorbing sheets, and the smoke passes through the wall of the water chamber, the horizontal heat absorbing sheets and the vertical heat absorbing sheets, so that the heat absorbing efficiency is higher.
The condensation flue wall is a water cavity wall, the condensation flue is partitioned by the flue, a detachable dustproof pool is arranged below the condensation flue, the flue is partitioned into the water cavity wall, the transverse heat absorbing sheets and the vertical heat absorbing sheets absorb heat, the medium water temperature rises and circulates, meanwhile, the flue gas temperature drops, and the water vapor is discharged to the dustproof pool with the dust in the condensation state and the flue, namely, sensible heat in the flue gas and latent heat of vaporization of the water vapor are fully recycled, so that the heat efficiency of the boiler is improved.
The storage has water in the dustproof pond, and the water in the dustproof pond can accumulate condensing and carry out the water seal to the flue gas, is linking to cut off the separation through the flue, and it is too much to avoid the ponding in the dustproof pond, and the dustproof pond needs to keep throughout there being water, and then avoids the flue gas refluence.
The fire grates comprise a first fire grate and a second fire grate, the combustion chamber is divided into a primary heating chamber and a secondary heating chamber, an air supply duct and an air exhaust duct are arranged in the combustion chamber, and the air supply duct and the air exhaust duct assist coal to be fully contacted and combusted with air, so that the environment-friendly and energy-saving effects are achieved.
The grate is a chain grate, the coal fed from the coal inlet is uniformly transmitted, and the fuel utilization rate is high.
The water cavity wall, the transverse heat absorbing sheets, the vertical heat absorbing sheets and the second grate are communicated with pretreatment medium water, a heat source is fully utilized for heating, the specific heat of the water is large, the heat release speed is low, and the boiler is suitable for large-area heating in winter in the northern cold.
The boiler is further provided with a coal inlet, a dust cleaning port and a flue cleaning port, the coal inlet is formed in the furnace body and is parallel to the fire grate, the dust cleaning port is arranged below the fire grate, a coal ash separating net is arranged between the fire grate and the bottom of the furnace body, the coal ash separating net and the fire grate form an included angle of 30-45 degrees, the included angle of 30-45 degrees enables coal ash to fall rapidly and be stored, secondary combustion can be effectively stored for clean coal, cleaning is convenient, the environment is kept neat, and heat in the ash is consumed in the buffer of falling of the coal ash so as to prevent scalding.
The combustion chamber is also internally provided with a gas burner which is connected with external gas through a gas valve; the technical boiler can generate heat by taking coal as fuel and gas as fuel, and is flexible in operation, energy-saving and environment-friendly.
The combustion chamber is connected with a foldable cooking bench through a guide chamber, the cooking bench can transfer a first layer of combustion chamber fire source into the cooking bench and send the first layer of combustion chamber fire source to a cooking bench chimney, a family can conveniently get fire, the fire is lasting and stable, and the space is utilized after the cooking bench is folded.
The boiler is also provided with a monitoring system which comprises a thermometer, a pressure gauge and an explosion-proof valve; the boiler operation parameter is monitored, is adjusted to the help, and factor of safety is high.
The flue clearance mouth includes horizontal flue clearance mouth and vertical flue clearance mouth, and horizontal flue clearance mouth is seted up on the furnace body and is on a parallel with horizontal flue, and vertical flue clearance mouth is seted up on the furnace body and is on a parallel with vertical flue.
In the technical scheme, when the gas fuel burner is operated, gas and air are mixed and sent to a combustion chamber; the gas valve adjusts the gas consumption to keep the mixing ratio of the gas and the air always at the optimal combustion mixing ratio, thereby realizing the optimal combustion efficiency. The air supply duct and the air exhaust duct adjust the air consumption by adjusting the rotating speed according to the change of the thermal load output requirement, and the purposes of temperature and energy conservation can be achieved.
The invention discloses a condensing internal combustion multi-return-stroke boiler, which has the beneficial effects that: the heat absorption sheet in the technical scheme has a large heat absorption area, absorbs heat in multiple surfaces, and increases the heating surface; the vertical heat absorbing sheets are clamped between the two rows of transverse heat absorbing sheets, the transverse heat absorbing sheets are separated to form a gap flue, the lower layer of the gap flue and the upper layer of the gap flue are mutually staggered, flue gas circularly flows from the gap between the transverse heat absorbing sheets and the vertical heat absorbing sheets, the flue gas passes through the heat absorbing sheets one by one when going downwards, and the heat absorbing efficiency is higher by adopting a return back burning principle; the gap flue is communicated with the condensing flue; the boiler body wall is a water cavity wall, the water cavity wall is communicated with the transverse heat absorbing sheets and the vertical heat absorbing sheets, smoke circulates between the heat absorbing sheets which are arranged in pairs, water scale is not easy to generate, the service life of the boiler is prolonged, the installation, the maintenance, the energy conservation and the environmental protection are facilitated, and the heat efficiency is improved by 15%.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of an embodiment of the present invention;
in the figure: 1-furnace body, 2-vertical heat absorbing sheets, 3-horizontal heat absorbing sheets, 4-flue partition, 5-second fire grate, 6-coal ash separating net, 7-gap flue, 8-guide chamber, 8 a-foldable hearth, 9-hearth chimney, 10-detachable dustproof pool, 11-condensation flue, 12-vertical flue cleaning port, 13-smoke exhaust port, 14-horizontal flue cleaning port, 15-coal inlet, 16-dust cleaning port and 17-first fire grate.
Detailed Description
Example 1
As shown in fig. 1 and 2, a condensing internal combustion multi-return boiler comprises a housing and a furnace body 1 arranged in the housing, wherein a combustion chamber, a return heated chamber and a condensing flue 11 are arranged in the furnace body 1, a first grate 17 and a second grate 5 are arranged at an inlet of the combustion chamber, and the combustion chamber is divided into a primary heating chamber and a secondary heating chamber; the return heating chamber is internally provided with transverse heat absorbing sheets 3 and vertical heat absorbing sheets 2, the vertical heat absorbing sheets 2 are clamped between the two rows of transverse heat absorbing sheets 3, gap flues 7 are formed by separating the transverse heat absorbing sheets 3, the lower layers of the gap flues 7 and the upper layers of the gap flues 7 are arranged in a staggered manner, and the gap flues 7 are communicated with a condensation flue 11; the wall of the furnace body 1 is a water cavity wall, and the water cavity wall is communicated with a transverse heat absorbing sheet 3 and a vertical heat absorbing sheet 2; the bottom of the water cavity wall is provided with a water inlet, the top of the water cavity wall is provided with a water outlet, and the water outlet is communicated with external facilities; the condensation flue wall 11 is a water cavity wall, the condensation flue 11 is separated by a flue partition 4, a detachable dustproof pool 10 is arranged below the condensation flue 11, and the flue partition 4 is the water cavity wall; the fire grate is a chain fire grate, comprises a first fire grate 17 and a second fire grate 5, and divides the combustion chamber into a primary heating chamber and a secondary heating chamber, and an air supply duct and an air extraction duct are arranged in the combustion chamber; the wall of the water cavity, the transverse heat absorbing sheets 3, the vertical heat absorbing sheets 2 and the second fire grate 5 are communicated with pretreatment medium water; the boiler is also provided with a coal inlet 15, a dust cleaning port 16 and a flue cleaning port, wherein the coal inlet 15 is arranged on the boiler body 1 and is parallel to the first grate 17 and the second grate 5, the dust cleaning port 16 is arranged below the grates, a coal ash separation net 6 is arranged between the grates and the bottom of the boiler body 1, and an included angle of 30 degrees is formed between the coal ash separation net 6 and the first grate 17; the combustion chamber is connected with a foldable cooking bench 8a through a guide chamber 8, and the guide chamber 8 is connected with a cooking bench chimney 9; the boiler is also provided with a monitoring system which comprises a thermometer, a pressure gauge and an explosion-proof valve; the flue cleaning port comprises a transverse flue cleaning port 14 which is arranged on the furnace body 1 and is parallel to the transverse flue, and a vertical flue cleaning port 12 which is arranged on the furnace body 1 and is parallel to the vertical flue, and flue gas is discharged from a smoke outlet 13.
When the coal-fired boiler is used, coal enters the boiler body from the coal inlet 15 and is stacked on the first grate 17 and the second grate 5, the first grate 17 and the second grate 5 are controlled by chains to uniformly lay the stacked coal, flue gas with heat after the coal is combusted flows circularly through the gaps of the transverse heat absorbing sheets 3 and the vertical heat absorbing sheets 2, the flue gas passes through the wall of the water passing cavity, the transverse heat absorbing sheets 3, the vertical heat absorbing sheets 2 and the condensing flue 11 and is discharged out of the smoke outlet 13 through a return back-burning principle, and the temperature of medium water communicated among all the components is increased and circulated; the temperature of the flue gas is reduced along with the flow of the flue gas, and the water vapor in the flue gas and the dust in the flue gas are discharged to the dustproof pool 10 in a condensation state; the sensible heat in the flue gas and the latent heat of vaporization of the water vapor are fully recycled, so that the heat efficiency of the boiler is improved.
Example 2
As shown in fig. 1 and 2, a condensing internal combustion multi-return boiler comprises a housing and a furnace body 1 arranged in the housing, wherein a combustion chamber, a return heated chamber and a condensing flue 11 are arranged in the furnace body 1, a first grate 17 and a second grate 5 are arranged at an inlet of the combustion chamber, and the combustion chamber is divided into a primary heating chamber and a secondary heating chamber; the return heating chamber is internally provided with transverse heat absorbing sheets 3 and vertical heat absorbing sheets 2, the vertical heat absorbing sheets 2 are clamped between the two rows of transverse heat absorbing sheets 3, gap flues 7 are formed by separating the transverse heat absorbing sheets 3, the lower layers of the gap flues 7 and the upper layers of the gap flues 7 are arranged in a staggered manner, and the gap flues 7 are communicated with a condensation flue 11; the wall of the furnace body 1 is a water cavity wall, and the water cavity wall is communicated with a transverse heat absorbing sheet 3 and a vertical heat absorbing sheet 2; the bottom of the water cavity wall is provided with a water inlet, the top of the water cavity wall is provided with a water outlet, and the water outlet is communicated with external facilities; the condensation flue wall 11 is a water cavity wall, the condensation flue 11 is separated by a flue partition 4, a detachable dustproof pool 10 is arranged below the condensation flue 11, and the flue partition 4 is the water cavity wall; the fire grate is a chain fire grate and comprises a first fire grate 17 and a second fire grate 5, the combustion chamber is divided into a primary heating chamber and a secondary heating chamber, and an air supply duct and an air exhaust duct are arranged in the combustion chamber; the wall of the water cavity, the transverse heat absorbing sheets 3, the vertical heat absorbing sheets 2 and the second fire grate 5 are communicated with pretreatment medium water; a gas burner is arranged in the combustion chamber and is connected with external gas through a gas valve; the combustion chamber is connected with a foldable cooking bench 8a through a guide chamber 8, and the guide chamber 8 is connected with a cooking bench chimney 9; the boiler is also provided with a monitoring system which comprises a thermometer, a pressure gauge and an explosion-proof valve; the flue cleaning port comprises a transverse flue cleaning port 14 which is arranged on the furnace body 1 and is parallel to the transverse flue, and a vertical flue cleaning port 12 which is arranged on the furnace body 1 and is parallel to the vertical flue, and flue gas is discharged from a smoke outlet 13.
When in use, the gas and the air are mixed and sent to the combustion chamber when the gas fuel device is operated; the gas valve adjusts the gas consumption to keep the mixing proportion of the gas and air to be the best combustion mixing ratio all the time, the air supply duct and the air exhaust duct adjust the rotation speed according to the change of the heat load output requirement to adjust the gas consumption, the gas with heat after the gas is combusted flows circularly through the gap between the transverse heat absorbing sheet 3 and the vertical heat absorbing sheet 2, the gas with heat passes through the wall of the water passing cavity, the transverse heat absorbing sheet 3, the vertical heat absorbing sheet 2 and the condensation flue 11 and is discharged out of the smoke outlet 13 through the return back burning principle, and the temperature of the medium water communicated among all the components is raised and circulated; the temperature of the gas with heat drops along with the flowing of the gas with heat, and the vapor in the gas with heat and the dust in the flue are discharged to the dustproof pool 10 in a condensation state; sensible heat in the gas with heat and latent heat of vaporization of water vapor are fully recycled, so that the heat efficiency of the boiler is improved, the optimal combustion efficiency is realized, and the purposes of temperature and energy conservation can be achieved.

Claims (5)

1. The utility model provides a many return strokes of condensing internal combustion boiler, includes the casing to and set up furnace body (1) in the casing, set up combustion chamber, return stroke heated chamber and condensation flue (11) in furnace body (1), its characterized in that: a fire grate is arranged at the inlet of the combustion chamber, transverse heat absorbing sheets (3) and vertical heat absorbing sheets (2) are arranged in the return heating chamber, the vertical heat absorbing sheets (2) are clamped between the two rows of transverse heat absorbing sheets (3), gap flues (7) are formed by separating the transverse heat absorbing sheets (3), the lower layers of the gap flues (7) and the upper layers of the gap flues (7) are arranged in a staggered mode, and the gap flues (7) are communicated with the condensation flues (11); the wall of the furnace body (1) is a water cavity wall, and the water cavity wall is communicated with the transverse heat absorbing sheets (3) and the vertical heat absorbing sheets (2); the bottom of the water cavity wall is provided with a water inlet, the top of the water cavity wall is provided with a water outlet, and the water outlet is communicated with external facilities;
the condensation flue (11) is a water cavity wall, the condensation flue (11) is separated by a flue partition (4), a detachable dustproof pool (10) is arranged below the condensation flue (11), and the flue partition (4) is the water cavity wall;
the fire grates comprise a first fire grate (17) and a second fire grate (5), the combustion chamber is divided into a primary heating chamber and a secondary heating chamber, and an air supply duct and an air extraction duct are arranged in the combustion chamber;
the fire grate is a chain grate;
pretreatment medium water is communicated with the water cavity wall, the transverse heat absorbing sheet (3), the vertical heat absorbing sheet (2) and the second fire grate (5);
the boiler is further provided with a coal inlet (15), a dust cleaning port (16) and a flue cleaning port, the coal inlet (15) is arranged on the boiler body (1) and parallel to the fire grate, the dust cleaning port (16) is arranged below the fire grate, a coal ash separation net (6) is arranged between the fire grate and the bottom of the boiler body (1), and an included angle of 30-45 degrees is formed between the coal ash separation net (6) and the fire grate.
2. A condensing internal combustion multi-cycle boiler as defined in claim 1, wherein: still be provided with gas burner in the combustion chamber, gas burner passes through the gas valve and connects outside gas.
3. A condensing internal combustion multi-cycle boiler as defined in claim 2, wherein: the combustion chamber is connected with a foldable cooking bench (8a) through a guide chamber (8).
4. A condensing internal combustion multi-cycle boiler as defined in claim 3, wherein: the boiler is also provided with a monitoring system which comprises a thermometer, a pressure gauge and an explosion-proof valve.
5. A condensing internal combustion multi-cycle boiler as defined in claim 4, wherein: the flue cleaning port comprises a transverse flue cleaning port (14) and a vertical flue cleaning port (12), the transverse flue cleaning port (14) is arranged on the furnace body (1) and is parallel to the transverse flue, and the vertical flue cleaning port (12) is arranged on the furnace body (1) and is parallel to the vertical flue.
CN201611162874.2A 2016-12-15 2016-12-15 Condensation type internal combustion multi-return boiler Active CN106524512B (en)

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CN106524512B true CN106524512B (en) 2022-05-17

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107255360A (en) * 2017-05-31 2017-10-17 方观平 A kind of hot-water boiler
CN107906734A (en) * 2017-09-30 2018-04-13 杨文程 A kind of return-stroke type wall-hung boiler

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2767897Y (en) * 2004-12-08 2006-03-29 李有胜 Energy-saving boiler
CN101571317A (en) * 2009-06-12 2009-11-04 北京通州通铭锅炉厂 Fire coal self-controlled boiler
KR20110100109A (en) * 2010-03-03 2011-09-09 김덕진 Water tube boiler
CN202734222U (en) * 2012-09-06 2013-02-13 吴登彬 Boiler with multiple return strokes thread smoke tube
CN205535972U (en) * 2016-01-02 2016-08-31 刘凯亮 Civilian cooking heating energy -saving pot stove
CN206281210U (en) * 2016-12-15 2017-06-27 杨文程 A kind of condensing internal combustion multi-pass boiler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2767897Y (en) * 2004-12-08 2006-03-29 李有胜 Energy-saving boiler
CN101571317A (en) * 2009-06-12 2009-11-04 北京通州通铭锅炉厂 Fire coal self-controlled boiler
KR20110100109A (en) * 2010-03-03 2011-09-09 김덕진 Water tube boiler
CN202734222U (en) * 2012-09-06 2013-02-13 吴登彬 Boiler with multiple return strokes thread smoke tube
CN205535972U (en) * 2016-01-02 2016-08-31 刘凯亮 Civilian cooking heating energy -saving pot stove
CN206281210U (en) * 2016-12-15 2017-06-27 杨文程 A kind of condensing internal combustion multi-pass boiler

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