CN208519799U - Low-nitrogen discharged boiler - Google Patents

Low-nitrogen discharged boiler Download PDF

Info

Publication number
CN208519799U
CN208519799U CN201821006929.5U CN201821006929U CN208519799U CN 208519799 U CN208519799 U CN 208519799U CN 201821006929 U CN201821006929 U CN 201821006929U CN 208519799 U CN208519799 U CN 208519799U
Authority
CN
China
Prior art keywords
chamber
condensation chamber
water cavity
heat exchanger
tube sheet
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
Application number
CN201821006929.5U
Other languages
Chinese (zh)
Inventor
裴韩佶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YANGZHOU STAR BOILER CO Ltd
Original Assignee
YANGZHOU STAR BOILER CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by YANGZHOU STAR BOILER CO Ltd filed Critical YANGZHOU STAR BOILER CO Ltd
Priority to CN201821006929.5U priority Critical patent/CN208519799U/en
Application granted granted Critical
Publication of CN208519799U publication Critical patent/CN208519799U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

The utility model discloses low-nitrogen discharged boilers a kind of in boiler technology field, including combustion chamber and condensation chamber, surface combustion burner is protruded into from one end of combustion chamber, before being equipped with combustion chamber in combustion chamber, back tube sheet, before combustion chamber, end ring, which is protruded into, along surface combustion burner between back tube sheet is furnished with the first horizontal heat exchanger tube, before combustion chamber, the first water cavity is formed between back tube sheet and burning chamber shell, first water cavity is connected to the first heat exchanger tube, bottom of combustion chamber is connected to condensation chamber, condensation chamber bottom is equipped with condensation chamber outlet flue, before being equipped with condensation chamber in condensation chamber, back tube sheet, before condensation chamber, the second horizontal heat exchanger tube is equipped between back tube sheet, before condensation chamber, the second water cavity is formed between back tube sheet and the shell of condensation chamber, second water cavity is connected to the second heat exchanger tube.The low-nitrogen discharged boiler is sufficiently exchanged heat by using surface combustion burner and the first heat exchanger tube, the second heat exchanger tube, improves boiler thermal efficiency, reduces NO in flue gasXContent.

Description

Low-nitrogen discharged boiler
Technical field
The utility model relates to a kind of boiler, in particular to a kind of low-nitrogen discharged boiler.
Background technique
Present coal burning and gas burning boiler, furnace interior design is unreasonable, and flue gas residence time in furnace body is short, exhaust gas temperature Height, pernicious gas content is high in flue gas, causes the thermal efficiency low, environmental protection and energy saving effect is poor.With the development of national economy, its people's section The raising of energy environmental consciousness adapts to environmental protection, energy-efficient requirement, it is necessary to further increase pot to improve inhabitation and investment environment Furnace thermal efficiency reduces the NO in flue gasXEqual pernicious gases content.
In Chinese patent database, a kind of coal conversion coal gas environment friendly energy-saving ordinary pressure water-boiling boiler is disclosed, application No. is: 200820013852.4;The applying date are as follows: 2008-07-02;Open (bulletin) number are as follows: CN201237344Y;Publication date are as follows: 2009-05-13.The normal-pressure hot-water boiler of the patent by be staggered in shell multiple heat exchanges being connected to water jacket every Plate slows down mass rate of emission so that flue gas discharge path is tortuous, reduces smog discharge temperature.Although the structure improves to a certain degree Boiler thermal efficiency, and reduce pernicious gas content in flue gas, but still be not able to satisfy country it is increasingly strict it is efficient, energy saving, Environmental requirement.
Utility model content
A kind of the purpose of the utility model is to provide thermals efficiency higher, more environmentally-friendly low-nitrogen discharged boiler.
Purpose of the utility model is realized as follows: a kind of low-nitrogen discharged boiler, including combustion chamber and setting are being burnt Condensation chamber below room, surface combustion burner are protruded into from one end of combustion chamber, and vertical combustion chamber front tube sheet, combustion are equipped in combustion chamber Room back tube sheet is burnt, along surface combustion burner end ring is protruded between combustion chamber front tube sheet and combustion chamber back tube sheet and is furnished with horizontal first and change Heat pipe, forms the first water cavity between combustion chamber front tube sheet, combustion chamber back tube sheet and the shell of combustion chamber, the first water cavity is changed with first Heat pipe connection, bottom of combustion chamber are equipped with outlet flue, and outlet flue is connected to condensation chamber smoke inlet, and condensation chamber bottom goes out equipped with condensation chamber Mouth, is equipped with vertical condensation chamber front tube sheet, condensation chamber back tube sheet in condensation chamber, condensation chamber front tube sheet and condensation chamber back tube sheet it Between be equipped with the second horizontal heat exchanger tube, form the second water between condensation chamber front tube sheet, condensation chamber back tube sheet and the shell of condensation chamber Chamber, the second water cavity are connected to the second heat exchanger tube.
The low-nitrogen discharged boiler of the utility model uses drum type brake surface combustion burner, a large amount of netted in drum surface arrangement Silk, uses and metal fiber wire is made containing Cr and rare-earth metal material, air and the flame distribution of fuel mixing after-combustion is made to exist Metal fiber wire surface reduces the NO that burning generates flue gasXContent.In addition, washing away ring cloth in combustion chamber by high-temperature flue gas The first interior heat exchanger tube, heat are fully absorbed, and are rotated flue gas by combustion chamber outlet flue and are entered condensation chamber, pass through in condensation chamber It crosses second of heat exchange and further decreases flue-gas temperature, further reduced the NO in flue gasXThe content of equal pernicious gases.
The second water cavity includes preceding water cavity and rear water cavity as a further improvement of the utility model, and preceding water cavity passes through first Water cavity before water cavity and second before vertical clapboard is divided into first, water cavity is divided into front lower room and preceding upper chamber by the first diaphragm plate before first, Lower room and rear upper chamber after water cavity is divided by the second diaphragm plate afterwards, front lower room are equipped with condensation chamber water inlet, and front lower room passes through the Two heat exchanger tubes are connected to rear lower room, and lower room is connected to by the second heat exchanger tube with water cavity before second afterwards, and water cavity passes through second before second Heat exchanger tube is connected to rear upper chamber, and rear upper chamber is connected to by the second heat exchanger tube with preceding upper chamber, and preceding upper chamber is equipped with condensation chamber water outlet. In this way, water shape " S " type in condensation chamber is flowed at four backhauls, abundant heat exchange is carried out with flue gas, has greatly strengthened heat transfer effect, Improve boiler thermal efficiency.
Horizontal cigarette is equipped between condensation chamber front tube sheet and condensation chamber back tube sheet as a further improvement of the utility model, Gas baffle, there are gaps between the shell of side and condensation chamber of the gas baffle far from condensation chamber smoke inlet.In this way, flue gas enters It after condensation chamber, is first sufficiently exchanged heat with first the second heat exchanger tube of backhaul transversal flow upper layer, then through flue gas partition and condensation Gap between room housing enters condensation chamber lower part, turns back to be formed after the second heat exchange tube of lower layer is washed away in the second backhaul to go out through condensation chamber Mouth, which enters, to be located at condensation chamber underflue and enters chimney and be discharged into atmosphere.By increasing flue gas flow length to further increase Boiler thermal efficiency.
As a further improvement of the utility model, further include Heat Room, Heat Room is located above combustion chamber, Heat Room and The link position of first water cavity is equipped with hole, and Heat Room water inlet is connected to condensation chamber water outlet, and being horizontally disposed in Heat Room has The front and back end of third heat exchanger tube, Heat Room is equipped with third water cavity, and third water cavity is connected to third heat exchanger tube.By using condensation chamber Water outlet is intake as Heat Room, is sufficiently exchanged heat with steam, and heat exchanger efficiency is improved.
Several second vertical clapboards are equipped in third water cavity as a further improvement of the utility model, so that condenser Water outlet forms the more backhaul flowings of " S " type in Heat Room, and then has carried out abundant heat exchange with steam, further enhances heat exchange effect Fruit improves heat exchanger efficiency.
The first heat exchanger tube and the second heat exchanger tube use stainless steel or finned carbon steel as a further improvement of the utility model, Pipe.By using the finned tube design with extended surface, boiler convection heat exchange area can be made to be multiplied, further increased Boiler thermal efficiency.
Surface combustion burner is using full premix surface combustion burner as a further improvement of the utility model, according in flue gas Oxygen content, surface combustion burner, than regulation system, automatically adjust air and fuel ratio, to realize boiler smoke using electronics in real time Low NOXDischarge, finally realize the purpose that low azo-cycle is protected.
Condensation chamber water inlet is connected to boiler system water return pipeline as a further improvement of the utility model, further Improve boiler thermal efficiency.
The supporting layer for as a further improvement of the utility model, further including outer heat insulation layer and being arranged in outside outer heat insulation layer, To further increase boiler thermal efficiency.
Bottom of combustion chamber is in arc-shaped as a further improvement of the utility model, convenient for the arrangement of the first heat exchanger tube.
Detailed description of the invention
Fig. 1 is the schematic diagram of the embodiment 1 of the low-nitrogen discharged boiler of the utility model.
Fig. 2 is the Water flow-path direction schematic diagram of the embodiment 1 of the low-nitrogen discharged boiler of the utility model.
Fig. 3 is the flue gas flow direction schematic diagram of the embodiment 1 of the low-nitrogen discharged boiler of the utility model.
Fig. 4 is the schematic diagram of the embodiment 2 of the low-nitrogen discharged boiler of the utility model.
Fig. 5 is the Water flow-path direction schematic diagram of the embodiment 2 of the low-nitrogen discharged boiler of the utility model.
Fig. 6 is the flue gas flow direction schematic diagram of the embodiment 2 of the low-nitrogen discharged boiler of the utility model.
Fig. 7 is the schematic diagram of the embodiment 3 of the low-nitrogen discharged boiler of the utility model.
Fig. 8 is the Water flow-path direction schematic diagram of the embodiment 3 of the low-nitrogen discharged boiler of the utility model.
Fig. 9 is the flue gas flow direction schematic diagram of the embodiment 3 of the low-nitrogen discharged boiler of the utility model.
Wherein, 1 combustion chamber, 2 condensation chambers, 3 surface combustion burners, 4 first heat exchanger tubes, 5 first water cavities, 6 outlet flues, 7 second Heat exchanger tube, water cavity before 8, water cavity after 9,10 condensation chamber water inlets, 11 condensation chamber water outlets, 12 condensation chamber outlet flues, 13 flues, 14 chimneys, 15 Heat Rooms, 16 link positions, 17 Heat Room water inlets, 18 third heat exchanger tubes, 19 third water cavities, 20 flue gases Baffle, 21 outer heat insulation layers, 22 supporting layers, 23 combustion chamber sewage draining exits, 24 condensation chamber sewage draining exits, 25 exhaust pipes, the water inlet of 26 combustion chambers Mouthful.
Specific embodiment
Embodiment 1
Low-nitrogen discharged boiler as shown in Figs. 1-3 is a kind of micro-pressure steam boiler, including combustion chamber 1 and setting in combustion chamber The condensation chamber 2 of 1 lower section, surface combustion burner 3 are protruded into from one end of combustion chamber 1, and the inserting end of surface combustion burner 3 is cylindrical, combustion It burns and is equipped with vertical combustion chamber front tube sheet, combustion chamber back tube sheet in room 1, along table between combustion chamber front tube sheet and combustion chamber back tube sheet Face burner 3 protrudes into end ring and is furnished with the first horizontal heat exchanger tube 4, the shell of combustion chamber front tube sheet, combustion chamber back tube sheet and combustion chamber The first water cavity 5 is formed between body, the first water cavity 5 is connected to the first heat exchanger tube 4, and 1 bottom of combustion chamber is equipped with outlet flue 6, outlet flue 6 It is connected to condensation chamber smoke inlet.Surface combustion burner 3 is using full premix surface combustion burner, according to oxygen content in flue gas, surface burning Device, than regulation system, automatically adjusts air and fuel ratio using electronics in real time, reduces the NO that burning generates flue gasXContent.The One heat exchanger tube 4 and the second heat exchanger tube 7 use stainless steel or finned carbon steel tubes, and boiler convection heat exchange area is made to be multiplied, and improve Boiler thermal efficiency.
It is equipped with vertical condensation chamber front tube sheet, condensation chamber back tube sheet in condensation chamber 2, is managed after condensation chamber front tube sheet and condensation chamber It is equipped with the second horizontal heat exchanger tube 7 between plate, forms the between condensation chamber front tube sheet, condensation chamber back tube sheet and the shell of condensation chamber Two water cavities, the second water cavity are connected to the second heat exchanger tube.Specifically, the second water cavity includes preceding water cavity 8 and rear water cavity 9, and preceding water cavity 8 is logical Cross before the first vertical clapboard is divided into first water cavity before water cavity and second, before first water cavity by the first diaphragm plate be divided into front lower room and before Upper chamber, lower room and rear upper chamber after rear water cavity 9 is divided by the second diaphragm plate, front lower room are equipped with condensation chamber water inlet 10, condensation Room water inlet 10 is connected to boiler system water return pipeline.Front lower room is connected to by the second heat exchanger tube with rear lower room, and lower room passes through afterwards Second heat exchanger tube is connected to water cavity before second, and the second preceding water cavity is connected to by the second heat exchanger tube with rear upper chamber, and rear upper chamber passes through the Two heat exchanger tubes are connected to preceding upper chamber, and preceding upper chamber is equipped with condensation chamber water outlet 11.In this way, water in condensation chamber shape " S " type at four (four backhauls are as shown in A, B, C, D in Fig. 2) is flowed in backhaul, has carried out abundant heat exchange with flue gas, has greatly strengthened heat transfer effect, mention High boiler thermal efficiency.2 bottom of condensation chamber is equipped with condensation chamber outlet flue 12, condensation chamber outlet flue 12 and positioned at 2 lower part of condensation chamber Flue 13 be connected to, flue 13 and chimney 14 are discharged into atmosphere.
The low-nitrogen discharged boiler of the present embodiment further includes Heat Room 15, and Heat Room 15 is located at 1 top of combustion chamber, Heat Room 15 It is equipped with hole with the link position 16 of the first water cavity 5, enters Heat Room, Heat Room from hole convenient for the vapor in the first water cavity Water inlet 17 is connected to condensation chamber water outlet 11, and being horizontally disposed in Heat Room has third heat exchanger tube 18, the front and back end of Heat Room 15 Equipped with third water cavity 19, third water cavity 19 is connected to third heat exchanger tube 18.Several second vertical clapboards are equipped in third water cavity 19, with So that leaving condenser water forms the more backhaul flowings of " S " type in Heat Room, and then abundant heat exchange is carried out with steam, has improved heat exchange Device efficiency.
As shown in figure 3, being equipped with horizontal gas baffle 20, gas baffle between condensation chamber front tube sheet and condensation chamber back tube sheet There are gaps between the shell of 12 sides and condensation chamber far from condensation chamber smoke inlet.The high-temperature flue gas that burning generates washes away ring cloth After the first heat exchanger tube 4 in combustion chamber 1, it is circular layout to form rotation flue gas according to the first heat exchanger tube 4, it is tangential with the first backhaul Into combustion chamber outlet flue and then enter condensation chamber, after flue gas partition 12 stops the second backhaul of formation to wash away the second heat exchanger tube 7 It turns back, with third backhaul the second heat exchanger tube of transversal flow 7 again, flue 13 is finally entered by condensation chamber outlet flue 12 and passes through cigarette Chimney 14 is discharged into atmosphere.
As shown in Fig. 2, the micro-pressure steam boiler of the present embodiment further includes outer heat insulation layer 21 and is arranged outside outer heat insulation layer 21 Supporting layer 22, to further increase 1 bottom of boiler thermal efficiency combustion chamber equipped with combustion chamber sewage draining exit 23,2 bottom of condensation chamber Equipped with condensation chamber sewage draining exit 24, exhaust pipe 25 is equipped at the top of condensation chamber.
The micro-pressure steam boiler of the present embodiment can make boiler by using the finned tube designing technique with extended surface Heat convection area is multiplied, and thoroughly changes the form image of conventional boiler, and flue gas is washed away through three backhauls, so that hot fume It is carried out after sufficiently exchanging heat with finned tube, the exhaust gas temperature of boiler is reduced within 60 DEG C, and design thermal efficiency is up to 99%, final real Existing high-efficiency environment friendly energy-conservation, and boiler is manufactured using minute-pressure, is able to satisfy 115 DEG C of saturated vapor requirements of user, while the minute-pressure Structure, which is not required to handle installation, puts formality on record, directly docking air water connector.
Embodiment 2
Low-nitrogen discharged boiler as Figure 4-Figure 6 is a kind of vacuum and steam boiler, in addition to valve seat, instrument nozzle design, Primary structure is substantially the same manner as Example 1, and details are not described herein.
Using the vacuum and steam boiler of the present embodiment, the exhaust gas temperature of boiler can be made to be reduced within 60 DEG C, design thermal effect Rate is up to 99%, finally realizes high-efficiency environment friendly energy-conservation, and boiler is manufactured using negative pressure, is not required to handle installation and puts formality on record, directly right Connect air water connector.
Embodiment 3
Low-nitrogen discharged boiler as Figure 7-9 is a kind of normal-pressure hot-water boiler, in addition to valve seat, instrument nozzle design, The main distinction of basic structure embodiment 1 is: being not provided with heat exchanger, condensation chamber water outlet 11 and combustion chamber water inlet 26 connect It is logical.
Using the normal-pressure hot-water boiler of the present embodiment, the exhaust gas temperature of boiler can be made to be reduced within 60 DEG C, design thermal effect Rate is up to 99%, finally realizes high-efficiency environment friendly energy-conservation.
The utility model is not limited to above-described embodiment, on the basis of technical solution disclosed by the utility model, this For the technical staff in field according to disclosed technology contents, not needing creative labor can be special to some of which technology Sign makes some replacements and deformation, these replacements and deformation are within the protection scope of the present utility model.

Claims (10)

1. a kind of low-nitrogen discharged boiler, including combustion chamber and the condensation chamber being arranged in below combustion chamber, it is characterised in that: surface combustion Burner is protruded into from one end of the combustion chamber, and vertical combustion chamber front tube sheet, combustion chamber back tube sheet, the combustion are equipped in combustion chamber End ring, which is protruded into, along the surface combustion burner between burning room front tube sheet and combustion chamber back tube sheet is furnished with the first horizontal heat exchanger tube, it is described The first water cavity, first water cavity and institute are formed between combustion chamber front tube sheet, combustion chamber back tube sheet and the shell of the combustion chamber The connection of the first heat exchanger tube is stated, the bottom of combustion chamber is equipped with outlet flue, and the outlet flue is connected to condensation chamber smoke inlet, described cold Solidifying room bottom is equipped with condensation chamber outlet flue, and vertical condensation chamber front tube sheet, condensation chamber back tube sheet are equipped in the condensation chamber, described The second horizontal heat exchanger tube is equipped between condensation chamber front tube sheet and condensation chamber back tube sheet, after the condensation chamber front tube sheet, condensation chamber The second water cavity is formed between tube sheet and the shell of the condensation chamber, second water cavity is connected to second heat exchanger tube.
2. low-nitrogen discharged boiler according to claim 1, it is characterised in that: second water cavity includes preceding water cavity and rear water Chamber, water cavity before water cavity and second before the preceding water cavity is divided into first by the first vertical clapboard, water cavity passes through first before described first Diaphragm plate is divided into front lower room and preceding upper chamber, and lower room and rear upper chamber after the rear water cavity is divided by the second diaphragm plate are described front lower Room is equipped with condensation chamber water inlet, and the front lower room is connected to by the second heat exchanger tube with rear lower room, and lower room passes through second after described Heat exchanger tube is connected to water cavity before second, and the second preceding water cavity is connected to by the second heat exchanger tube with rear upper chamber, and the rear upper chamber is logical It crosses the second heat exchanger tube to be connected to preceding upper chamber, the preceding upper chamber is equipped with condensation chamber water outlet.
3. low-nitrogen discharged boiler according to claim 2, it is characterised in that: managed after the condensation chamber front tube sheet and condensation chamber Horizontal gas baffle, side of the gas baffle far from the condensation chamber smoke inlet and the condensation chamber are equipped between plate There are gaps between shell.
4. low-nitrogen discharged boiler according to claim 3, it is characterised in that: further include Heat Room, the Heat Room is located at Above the combustion chamber, the link position of the Heat Room and the first water cavity is equipped with hole, the Heat Room water inlet with it is described Condensation chamber water outlet is connected to, and being horizontally disposed in the Heat Room has third heat exchanger tube, and the front and back end of the Heat Room is equipped with third Water cavity, the third water cavity are connected to the third heat exchanger tube.
5. low-nitrogen discharged boiler according to claim 4, it is characterised in that: it is perpendicular to be equipped with several second in the third water cavity Partition.
6. described in any item low-nitrogen discharged boilers according to claim 1 ~ 5, it is characterised in that: first heat exchanger tube and second Heat exchanger tube uses stainless steel or finned carbon steel tubes.
7. described in any item low-nitrogen discharged boilers according to claim 1 ~ 5, it is characterised in that: the surface combustion burner is using complete Premix surface combustion burner.
8. described in any item low-nitrogen discharged boilers according to claim 1 ~ 5, it is characterised in that: the condensation chamber water inlet and pot The connection of furnace system water return pipeline.
9. described in any item low-nitrogen discharged boilers according to claim 1 ~ 5, it is characterised in that: further include outer heat insulation layer and setting Supporting layer outside outer heat insulation layer.
10. described in any item low-nitrogen discharged boilers according to claim 1 ~ 5, it is characterised in that: the bottom of combustion chamber is in circle Arcuation.
CN201821006929.5U 2018-06-28 2018-06-28 Low-nitrogen discharged boiler Active CN208519799U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821006929.5U CN208519799U (en) 2018-06-28 2018-06-28 Low-nitrogen discharged boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821006929.5U CN208519799U (en) 2018-06-28 2018-06-28 Low-nitrogen discharged boiler

Publications (1)

Publication Number Publication Date
CN208519799U true CN208519799U (en) 2019-02-19

Family

ID=65337542

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821006929.5U Active CN208519799U (en) 2018-06-28 2018-06-28 Low-nitrogen discharged boiler

Country Status (1)

Country Link
CN (1) CN208519799U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110772938A (en) * 2019-11-01 2020-02-11 中冶东方工程技术有限公司 Intensive smoke plume treatment and purification system and method
CN113606785A (en) * 2021-08-11 2021-11-05 郭奇 Forced circulation ultra-low nitrogen vacuum phase-change hot water condensation boiler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110772938A (en) * 2019-11-01 2020-02-11 中冶东方工程技术有限公司 Intensive smoke plume treatment and purification system and method
CN113606785A (en) * 2021-08-11 2021-11-05 郭奇 Forced circulation ultra-low nitrogen vacuum phase-change hot water condensation boiler

Similar Documents

Publication Publication Date Title
CN208519799U (en) Low-nitrogen discharged boiler
CN210373522U (en) Vacuum boiler with flue gas recirculation
CN212178840U (en) Horizontal full premix burning single return steam boiler
CN104964312A (en) Regenerative energy-saving gas cooker
CN102635945A (en) Through-flow type narrow-clearance integral condensation hot-water boiler
CN205717142U (en) Biomass double furnace thorax gas-steam boiler and combustion system thereof
CN205245268U (en) Commercial gas cooking range smoke waste heat recovery unit
CN204830050U (en) Heat energy -saving gas -cooker returns
CN101726111A (en) Non-premixing inverted condensing gas water heater
CN208936554U (en) A kind of full premix low nitrogen burning proportion adjustment boiler
CN201497177U (en) Vapor-heat integral furnace
CN210861032U (en) Novel low-nitrogen energy-saving steam generator
CN111550922A (en) Horizontal condensing gas normal pressure hot water boiler
CN105157220B (en) Dynamic heat-exchange energy-saving environment-protection boiler
CN208886740U (en) Efficient low nitrogen horizontal tubular boiler
CN208588082U (en) Effective energy-saving vertical boiler
CN205079443U (en) Board -like gas boiler
CN205535972U (en) Civilian cooking heating energy -saving pot stove
CN204880061U (en) Horizontal gas boiler
CN208735899U (en) Energy-saving ultralow nitrogen vertical boiler
CN205783758U (en) A kind of boiler of Novel suspending rotation combustion
CN2557830Y (en) Domestic energy-saving boiler
CN206787031U (en) A kind of UTILIZATION OF VESIDUAL HEAT IN energy-saving steam boiler
CN212408650U (en) Low-nitrogen energy-saving gas boiler
CN211716883U (en) Novel coaxial air supply and exhaust pipe of wall-mounted gas stove

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant