CN219588924U - W flame combustion boiler - Google Patents

W flame combustion boiler Download PDF

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Publication number
CN219588924U
CN219588924U CN202320719428.6U CN202320719428U CN219588924U CN 219588924 U CN219588924 U CN 219588924U CN 202320719428 U CN202320719428 U CN 202320719428U CN 219588924 U CN219588924 U CN 219588924U
Authority
CN
China
Prior art keywords
wall
air
working fluid
flame combustion
combustion boiler
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
CN202320719428.6U
Other languages
Chinese (zh)
Inventor
刘涛
刘兴晖
王超
高壮
杨明伟
王龙杰
冉大召
李昊峰
邹加文
王洋
陈煜�
任伟
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.)
Xian Thermal Power Research Institute Co Ltd
Hebei Handan Power Generation Co Ltd
Original Assignee
Xian Thermal Power Research Institute Co Ltd
Hebei Handan Power Generation 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 Xian Thermal Power Research Institute Co Ltd, Hebei Handan Power Generation Co Ltd filed Critical Xian Thermal Power Research Institute Co Ltd
Priority to CN202320719428.6U priority Critical patent/CN219588924U/en
Application granted granted Critical
Publication of CN219588924U publication Critical patent/CN219588924U/en
Priority to DE202023106318.7U priority patent/DE202023106318U1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L5/00—Blast-producing apparatus before the fire
    • F23L5/04—Blast-producing apparatus before the fire by induction of air for combustion, e.g. using steam jet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00—Staged combustion
    • F23C2201/10—Furnace staging
    • F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/06041—Staged supply of oxidant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
    • F23L2900/15043—Preheating combustion air by heat recovery means located in the chimney, e.g. for home heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2221/00—Pretreatment or prehandling
    • F23N2221/08—Preheating the air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Abstract

The utility model discloses a W flame combustion boiler, which comprises a hearth and an adherence air nozzle, wherein the hearth comprises a front wall, a rear wall, a left side wall and a right side wall, and the front wall and the rear wall are respectively provided with a front furnace arch and a rear furnace arch; the wall-attached air nozzles are vertically arranged on two side edges of the front wall and the rear wall, the arrangement positions of the wall-attached air nozzles are a main combustion area secondary air area and an area between the main combustion area and over-fire air, and the wall-attached air nozzles are of a zoom structure. According to the utility model, through reasonable nozzle body structural design, on the basis of ensuring the rigidity of the mixed fluid, the consumption of compressed air with lower temperature is effectively reduced, the air temperature of the wall-attached air mixed fluid is not obviously reduced, and the influence on the combustion working condition in the furnace and the thermal stress change of the water cooling wall is obviously reduced. The air layer parallel to the jet flow on the wall surface of the water-cooling wall does not directly wash the water-cooling wall, so that the risk of washing and wearing the high-temperature water-cooling wall is effectively reduced. The wall-attached air system adopting the injection technology has important significance for the safe, economic and environment-friendly operation of the current coal-fired power station boiler.

Description

W flame combustion boiler
Technical Field
The utility model relates to the technical field of W flame boilers, in particular to a W flame combustion boiler.
Background
The W flame boiler is widely applied in China, but still has some problems in actual operation, and has the defects of high NOx emission, poor stable combustion, high content of fly ash combustible, over-temperature of a lower hearth water-cooled wall, large wall temperature deviation and serious slagging. The high NOx emission is caused by the fact that the combustion of coal powder in the W-flame boiler is carried out under the high-temperature oxygen-enriched condition, so that the generation of fuel type NOx can be promoted, and the great difference from the theoretical real realization is realized although the thick and thin combustion measures have a certain improvement effect. In actual operation, in order to reduce the fuel cost, the actual combustion coal quality of the boiler is sometimes worse than the designed coal quality, such as inferior coal with higher combustion ash, and the dry base ash Ad is more than 40%, which belongs to the coal with extremely difficult stable combustion and medium difficult burnout. When the boiler burns high ash inferior coal, the pulverized coal is late in ignition and poor in stable combustion, and the pulverized coal is difficult to ensure after being burnt, so that the content of the fly ash combustible is higher. The W flame boiler adopts the vertical tube panel type water-cooling wall, and the water-cooling wall is connected with a plurality of tube panels in parallel due to the large size of the lower hearth, so that correspondingly, the geothermal deviation is larger, and the deviation of the heat load of the hearth is more sensitive. The uneven distribution of local heat load of the water wall can cause the overtemperature of the water wall to burst pipes, the wall temperature deviation is large and the fins are pulled to crack, so that the safe operation of the boiler is affected. Meanwhile, unreasonable distribution of overgrate air on the arch also can lead to different ignition point positions of the burner arranged along the width direction of the hearth, different undershoot depths of flames of the burner, and larger wall temperature deviation of the water-cooled walls of the front wall and the rear wall along the width direction of the hearth. The serious slagging is caused by the fact that the temperature of a lower hearth of the W flame boiler is higher, and the temperature near the water-cooled wall is higher under the condition that no secondary air or low-temperature circulating smoke is cooled near the water-cooled wall, so that slagging is easy.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent.
To this end, an embodiment of the present utility model proposes a W flame combustion boiler.
The utility model provides a W flame combustion boiler, comprising:
the furnace comprises a furnace chamber, a furnace body and a control device, wherein the furnace chamber comprises a front wall, a rear wall, a left side wall and a right side wall, the front wall and the rear wall are respectively provided with a front furnace arch and a rear furnace arch, the front wall and the rear wall are oppositely arranged, and the left side wall and the right side wall are oppositely arranged;
the wall-attached air nozzle is vertically arranged on two side edges of the front wall and the rear wall, the arrangement position of the wall-attached air nozzle is a main combustion area secondary air area and an area between the main combustion area and over-fire air, the wall-attached air nozzle comprises a nozzle body, the nozzle body comprises a convergent portion, a divergent portion and a throat portion, the throat portion is arranged between the convergent portion and the divergent portion, and the convergent portion, the divergent portion and the throat portion form a convergent-divergent structure.
In some embodiments, the adherent wind nozzles of the primary combustion zone secondary wind zone are disposed proximate downstream of the wind powder jets.
In some embodiments, the coanda wind nozzle further comprises a working fluid ejection chamber disposed at the throat.
In some embodiments, the working fluid ejection chamber has an aperture positioned toward the diverging portion.
In some embodiments, the taper is an inlet location for the injection fluid.
In some embodiments, the diverging portion is an exit location for the mixed fluid.
In some embodiments, the throat is provided with a working fluid inlet communicating with the working fluid ejection chamber.
In some embodiments, the working fluid inlet is connected to a working fluid conduit.
In some embodiments, a pressure monitoring instrument and a pressure regulating valve are arranged on the working fluid pipeline.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the wall-attached air nozzle is arranged at the proper position of the W flame combustion boiler, the jet flow technology is adopted, a small amount of working fluid is used for jetting jet fluid, and mixed fluid with proper jet flow rigidity and air temperature is obtained, so that the air supply of an anoxic combustion area in the boiler is effectively supplemented, the problems of high-temperature corrosion and contamination and slagging of the water-cooled wall in the boiler are relieved, and the safety and economical efficiency of the operation of the boiler are improved.
According to the utility model, through reasonable nozzle body structural design, on the basis of ensuring the rigidity of the mixed fluid, the consumption of compressed air with lower temperature is effectively reduced, the air temperature of the wall-attached air mixed fluid is not obviously reduced, and the influence on the combustion working condition in the furnace and the thermal stress change of the water cooling wall is obviously reduced. The air layer parallel to the jet flow on the wall surface of the water-cooling wall does not directly wash the water-cooling wall, so that the risk of washing and wearing the high-temperature water-cooling wall is effectively reduced. The wall-attached air nozzle adopting the injection technology has important significance for the safe, economic and environment-friendly operation of the current coal-fired power station boiler.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a system of a W-flame combustion boiler of the present utility model;
FIG. 2 is a schematic view of an attachment wind nozzle;
reference numerals illustrate:
the wall-attached air nozzle 1, the convergent part 2, the throat part 3, the divergent part 4, the working fluid injection cavity 5, the working fluid inlet 6, the pressure regulating valve 7, the pressure monitoring instrument 8, the working fluid pipeline 9, the air powder jet 10, the front furnace arch 11 and the rear furnace arch 12.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
A W flame combustion boiler according to an embodiment of the present utility model is described below with reference to the accompanying drawings.
As shown in fig. 1-2, the W flame combustion boiler of the present utility model comprises a furnace and an adherent wind nozzle 1.
The hearth comprises a front wall, a rear wall, a left side wall and a right side wall, wherein the front wall and the rear wall are respectively provided with a front furnace arch 11 and a rear furnace arch 12, the front wall and the rear wall are oppositely arranged, and the left side wall and the right side wall are oppositely arranged.
Specifically, a front wall, a rear wall, a left side wall and a right side wall enclose a hearth of the W-flame boiler, wherein the front wall and the rear wall are oppositely arranged, the left side wall and the right side wall are oppositely arranged, a front furnace arch 11 is arranged on the front wall, a rear furnace arch 12 is arranged on the rear wall, the front furnace arch 11 and the rear furnace arch 12 are oppositely arranged on two sides of the hearth, and the front furnace arch 11 and the rear furnace arch 12 divide the hearth into an upper hearth and a lower hearth.
The main combustion area of the W-flame combustion boiler comprises a primary air area and a secondary air area, wherein the primary air area is arranged on the furnace arch, the secondary air area is mainly arranged under the furnace arch, the secondary air area is mainly arranged on the furnace arch, and the over-fire air area is arranged on the upper hearth.
The wall-attached air nozzle 1 is vertically arranged on two side edges of the front wall and the rear wall, the arrangement position of the wall-attached air nozzle 1 is a main combustion area secondary air area and an area between the main combustion area and over-fire air, the wall-attached air nozzle 1 comprises a nozzle body, the nozzle body comprises a convergent part 2, a divergent part 4 and a throat part 3, the throat part 3 is arranged between the convergent part 2 and the divergent part 4, and the convergent part 2, the divergent part 4 and the throat part 3 form a convergent-divergent structure.
Specifically, the wall-attached air nozzles 1 are correspondingly arranged on the front wall and the rear wall respectively, the wall-attached air nozzles 1 on the front wall are perpendicular to the front wall, the wall-attached air nozzles 1 on the rear wall are perpendicular to the rear wall, the wall-attached air nozzles 1 are arranged in the secondary air area of the main combustion area of the W-flame combustion boiler, the wall-attached air nozzles 1 positioned in the secondary air area of the main combustion area are arranged close to the downstream of the air powder jet 10, and meanwhile the wall-attached air nozzles 1 are arranged in the area between the main combustion area and the over-fire air. It will be appreciated that the wall-mounted air nozzle 1 is provided in the region of the primary and secondary air zone and the region between the primary and overfire air zone, because of the strong reducing atmosphere and the high risk of high temperature corrosion. The wall-attached air nozzle 1 is arranged perpendicular to the front wall water-cooling wall and the rear wall water-cooling wall, for the two side walls, jet flow is parallel to the water-cooling wall surface, for the front wall and the rear wall, jet flow is perpendicular to the water-cooling wall surface, and the purpose is to form an air protection film on the two side wall surfaces.
The wall-attached air nozzle 1 comprises a nozzle body, wherein the nozzle body comprises a convergent part 2, a divergent part 4 and a throat part 3, the throat part 3 is positioned between the convergent part 2 and the divergent part 4, namely, the junction of the convergent part 2 and the divergent part 4, and the convergent part 2, the divergent part 4 and the throat part 3 form a convergent-divergent structure of the nozzle body.
In some embodiments, 3 layers of the wall-mounted air nozzles 1 are arranged in the secondary air area of the main combustion area, 2 wall-mounted air nozzles 1 are arranged in each layer, and one layer of wall-mounted air nozzles 1 is arranged in the secondary air area of the main combustion area, and 2 wall-mounted air nozzles 1 are arranged in each layer.
The working fluid injection cavity 5 of the wall-attached air nozzle 1 is arranged at the throat part 3 of the nozzle body, the working fluid injection cavity 5 is of an open-pore structure, and the open pore position of the working fluid injection cavity 5 faces the diverging part 4.
The throat 3 of the nozzle body is provided with a working fluid inlet 6, the working fluid inlet 6 is communicated with the working fluid injection cavity 5, and working fluid enters the working fluid injection cavity 5 through the working fluid inlet 6 and is injected from the opening position of the working fluid injection cavity 5.
The wall-attached air nozzle 1 is connected with a working fluid air source through a working fluid pipeline 9 at the position of a working fluid inlet 6, and in order to adapt to the requirements of different operation conditions, a pressure regulating valve 7 and a pressure monitoring instrument 8 are arranged on the working fluid pipeline 9, and the jet pressure of the working fluid is regulated regularly according to regular maintenance and the detection result of the reducing atmosphere of the wall surface of the water-cooled wall.
Specifically, the power plant regularly has performance test or combustion adjustment test arrangement, and during the test, the flue gas analyzer is adopted to sample the flue gas composition analysis through the reserved measuring holes on the water cooling wall, and when the test result shows that the wall surface O 2 Low concentration of CO and H 2 When the S concentration is high, the wall surface has strong reducing atmosphere, and the jet rigidity or the air quantity of the wall-attached air nozzle 1 needs to be increased. During the maintenance of the furnace, the adjustment direction of the jet flow rigidity of the adherence air nozzle 1 can be determined according to the inspection result of the high-temperature corrosion condition of the surface of the water-cooled wall in the furnace.
The injection fluid is hot secondary air led out from a burner bellows of the W flame combustion boiler, the working fluid is compressed air, the pressure of the compressed air is 0.3-1MPa, and the flow of the compressed air flowing in from the working fluid inlet 6 is about 5% of the flow of the hot secondary air entering from the tapering part 2.
The injection fluid enters the nozzle body from the tapered part 2, and the high-speed jet of the working fluid is utilized to form negative pressure injection in the working fluid injection cavity 5, so that the injection fluid is mixed with the working fluid at the throat part 3, the speed of the mixed fluid flowing out of the tapered part 4 is greatly improved due to the left and right injection of the working fluid, and the mixed fluid effectively supplements the air supply of the anoxic combustion area in the furnace. In addition, the air temperature of the mixed fluid is close to the hot secondary air temperature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms may be directed to different embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (9)

1. A W-flame combustion boiler, comprising:
the furnace comprises a furnace chamber, a furnace body and a control device, wherein the furnace chamber comprises a front wall, a rear wall, a left side wall and a right side wall, the front wall and the rear wall are respectively provided with a front furnace arch and a rear furnace arch, the front wall and the rear wall are oppositely arranged, and the left side wall and the right side wall are oppositely arranged;
the wall-attached air nozzle is vertically arranged on two side edges of the front wall and the rear wall, the arrangement position of the wall-attached air nozzle is a main combustion area secondary air area and an area between the main combustion area and over-fire air, the wall-attached air nozzle comprises a nozzle body, the nozzle body comprises a convergent portion, a divergent portion and a throat portion, the throat portion is arranged between the convergent portion and the divergent portion, and the convergent portion, the divergent portion and the throat portion form a convergent-divergent structure.
2. The W flame combustion boiler of claim 1, wherein the adherent wind nozzles of the primary combustion zone secondary wind zone are disposed proximate downstream of the wind powder jet.
3. The W flame combustion boiler of claim 1, wherein the wall-mounted wind nozzle further comprises a working fluid injection cavity, the working fluid injection being disposed at the throat.
4. A W flame combustion boiler as set forth in claim 3 wherein said working fluid injection chamber has an opening positioned toward said diverging section.
5. The W flame combustion boiler of claim 1, wherein the taper is an injection fluid inlet location.
6. The W-flame combustion boiler of claim 1, wherein the diverging section is an outlet location for the mixed fluid.
7. A W-flame combustion boiler as set forth in claim 3 wherein said throat is provided with a working fluid inlet communicating with said working fluid injection chamber.
8. The W-flame combustion boiler of claim 7, wherein the working fluid inlet is connected to a working fluid conduit.
9. The W-flame combustion boiler of claim 8, wherein a pressure monitor and a pressure regulating valve are provided on the working fluid conduit.
CN202320719428.6U 2023-04-04 2023-04-04 W flame combustion boiler Active CN219588924U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202320719428.6U CN219588924U (en) 2023-04-04 2023-04-04 W flame combustion boiler
DE202023106318.7U DE202023106318U1 (en) 2023-04-04 2023-10-31 W flame combustion boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320719428.6U CN219588924U (en) 2023-04-04 2023-04-04 W flame combustion boiler

Publications (1)

Publication Number Publication Date
CN219588924U true CN219588924U (en) 2023-08-25

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ID=87696394

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320719428.6U Active CN219588924U (en) 2023-04-04 2023-04-04 W flame combustion boiler

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Country Link
CN (1) CN219588924U (en)
DE (1) DE202023106318U1 (en)

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Publication number Publication date
DE202023106318U1 (en) 2023-12-01

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