CN111998331A - Curved hearth of natural gas fired boiler - Google Patents
Curved hearth of natural gas fired boiler Download PDFInfo
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- CN111998331A CN111998331A CN202010900881.8A CN202010900881A CN111998331A CN 111998331 A CN111998331 A CN 111998331A CN 202010900881 A CN202010900881 A CN 202010900881A CN 111998331 A CN111998331 A CN 111998331A
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- type wall
- membrane type
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- furnace body
- cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
Abstract
The utility model provides a fire curved surface furnace of natural gas boiler, the combustion engine comprises a combustion engine, the furnace body of water-cooling membrane type wall, the fixed installation pipe that is equipped with of furnace body front side, the vertical afterbody ripple membrane type wall that is equipped with of rear side in the furnace body, the level is equipped with top ripple membrane type wall in the furnace body, form afterbody water-cooling wet back flue between the water-cooling membrane type wall of afterbody ripple membrane type wall rear side and furnace body rear side, form top horizontal channel between the water-cooling membrane type wall on the top of top ripple membrane type wall and furnace body top, the flue gas that has between the water-cooling membrane type wall of the preceding side of top ripple membrane type wall and furnace body front side and communicate with top horizontal channel front side turns. The invention prolongs the flowing time of the flue gas in the boiler, and the corrugated water-cooling membrane walls can multiply increase the heated area in unit space, and the corrugated structure design can well destroy the boundary layer of the flue gas, play a role in enhancing heat transfer, and absorb more heat to reduce the heat of the high-temperature flue gas from the hearth.
Description
Technical Field
The invention belongs to the technical field of energy conservation and environmental protection of boilers, and particularly relates to a curved-surface hearth of a natural gas-fired boiler.
Background
With the deep promotion of the policy of 'coal to gas' in China, natural gas boilers are gradually carried out from small tonnage to large tonnage boilers, one of the assembled boilers is a fast assembly of an SZS type, the boiler is assembled in a boiler manufacturer and then transported to the site, the water and electricity of a user can be accessed for use, the installation time is short, the cost is low, the product quality is high, after the full-membrane wall structure is adopted, the air leakage rate of the boiler is low, the thermal efficiency of the boiler is high, the load carrying capacity of the boiler is strong, and based on the advantages, the natural gas fired boiler with the structure of the SZS type has good development prospect in the market.
The typical structure of the boiler mainly comprises two parts, wherein one side of the boiler is an offset hearth, a burner is arranged at the front end part of the hearth, the hearth is used as a space for providing fuel combustion, water-cooling membrane type wall heating surfaces are arranged around the hearth, and the heating surfaces play roles of heat absorption and sealing; the other side is provided with a superheater and a convection bank or only the convection bank, the heating surfaces are used for absorbing heat emitted by the flowing of the flue gas and are collectively called as convection heating surfaces, the peripheries of the two parts are all sealed by water-cooling membrane walls, and the two parts are like an English letter D in appearance, so the two parts are called as D-type boilers.
In the process of large-scale D-type boiler, because the structure of the boiler is too compact, the convection bank and the hearth of the boiler can not be too large, and after the tonnage of the boiler is increased, the quality requirement of boiler steam is high, but the upper and lower drums for connecting the convection bank can not be too large, if the steam quality of the boiler is improved, the diameter of the upper drum needs to be increased, because the D-type boiler is delivered integrally, the transportation size also limits the increase of the volume of the D-type boiler, and the technical contradiction is met in the large-scale D-type boiler due to the combination of the limitations of the convection bank, the hearth, the drums and the transportation, and the contradiction that the large-scale requirement of the boiler and too many heating surfaces can not be arranged under the existing structure occurs.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the curved hearth of the natural gas fired boiler, which is energy-saving and environment-friendly, can fully improve the heat exchange efficiency and reduce the volume of the boiler.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a fire curved surface furnace of natural gas boiler, furnace body including combustor and water-cooling membrane type wall, the round hole has been seted up on the water-cooling membrane type wall of furnace body front side, the water-cooling membrane type wall external fixation of furnace body front side is equipped with one and corresponds penetrating installation pipe with the round hole, the installation pipe sets up along fore-and-aft direction level, the vertical afterbody ripple membrane type wall that is equipped with of furnace body rear side, the furnace body internal level is equipped with top ripple membrane type wall, top ripple membrane type wall rear side is connected with the last side of afterbody ripple membrane type wall, the left side and the right side of top ripple membrane type wall are connected with the water-cooling membrane type wall on the left water-cooling membrane type wall of furnace body and right side respectively, form afterbody water-cooling wet back flue between the water-cooling membrane type wall of afterbody ripple membrane type wall rear side and furnace body rear side, form top horizontal channel between the front side of top ripple type wall and the water-cooling membrane type The burner is arranged in the installation guide pipe and penetrates through the round hole to spray flame to the inside of the hearth.
The top corrugated film type wall is integrally of a V-shaped structure with a low middle part and high left and right sides, at least one vertical corrugated film type wall is arranged between the top of the top corrugated film type wall and the water-cooled film type wall at the top of the furnace body, and the vertical corrugated film type wall divides a top horizontal channel into at least two horizontal corrugated flues.
The water-cooling membrane type walls around the furnace body on the front side of the corrugated membrane type wall at the tail part are all of a corrugated membrane type wall structure; the tail corrugated film type wall, the top corrugated film type wall, the vertical corrugated film type wall and the corrugated film type wall structure on the periphery of the furnace body are all straight tube film type walls formed by welding steel tubes and flat steel, and the straight tube film type walls are bent into a wave curved surface shape through a wavy mold.
The combustor is composed of three sections, two adjacent sections of cylindrical shells are coaxially connected through a flexible connecting pipe, a plurality of groove-shaped rails are arranged on the inner wall of the installation conduit along the axis direction, rollers rolling along the groove-shaped rails are arranged on the excircle of the cylindrical shell of the combustor, and heat-insulating materials in sliding fit with the inner wall of the installation conduit and the groove-shaped rails are arranged on the outer circumference of the rear side of the middle section of the combustor;
two telescopic adjusting rods are arranged between the inner wall of the water-cooling membrane type wall on the front side of the furnace body and the burner, the upper ends of the two telescopic adjusting rods are connected with the water-cooling membrane type wall on the front side of the furnace body through upper universal hinges, the lower ends of the two telescopic adjusting rods are connected with the upper portion of the last section of the burner through lower universal hinges, the two telescopic adjusting rods are all obliquely arranged, and the two telescopic adjusting rods are symmetrically arranged about the central line of the installation guide pipe.
The telescopic adjusting rod comprises an internal thread sleeve and a screw rod which extends into the internal thread sleeve and is in threaded connection with the internal thread sleeve.
By adopting the technical scheme, the tail corrugated membrane type wall, the top corrugated membrane type wall, the vertical corrugated membrane type wall and the corrugated membrane type wall structure around the furnace body which are arranged inside the furnace body form a curved surface wave water-cooling membrane type wall structure, so that the internal space of the furnace chamber is fully utilized, and the heat exchange area is greatly improved. The working principle of the invention is as follows: the natural gas is through the flue gas that produces of combustor backward spun flame after the burning of corrugate furnace, reverse flow around flame (the flue gas can cool off flame all around flame, reduce nitrogen oxide's production), upwards get into to the at least two horizontal ripple flues of top horizontal passage in through the flue gas turns to the passageway, the flue gas flows to afterbody water-cooling wet back flue backward, inside rethread gas flow turns to the passageway and enters into convection bank, the flue gas is through scouring over the heater and behind the convection bank through the exhaust port discharge boiler. The water-cooling film wall of the furnace body absorbs the temperature of the flue gas, the temperature is taken away by circulating water in the film wall, the flue gas is finally collected in the upper boiler barrel, feed water enters the convection tube bundle through the upper boiler barrel and then enters the lower boiler barrel, after passing through the steam-water separation device in the upper boiler barrel, steam is used by a user, and water enters the circulation of the convection tube bundle and the water-cooling film wall.
The invention has the following beneficial effects:
firstly, as the redundant space in the hearth of the existing boiler is added with the tail corrugated film type wall, the top corrugated film type wall and the vertical corrugated film type wall, the utilization of the redundant space is carried out, the volume of the boiler can be obviously reduced, the large-scale boiler is convenient, and the overall transportation cost is reduced;
secondly, the method comprises the following steps: the tail corrugated membrane type wall is arranged inside the boiler, the top corrugated membrane type wall and the vertical corrugated membrane type wall are arranged inside the boiler, the flowing time of smoke inside the boiler is prolonged, meanwhile, the corrugated water-cooling membrane type walls can multiply increase the heating area in a unit space, the evaporation capacity of the boiler can be improved by more than 30% in the same volume, the boundary layer of the smoke can be well damaged by the design of the corrugated structure, the effect of strengthening heat transfer is achieved, the heat of high-temperature smoke coming out from a hearth can be reduced by absorbing more heat, the smoke can be reduced to about 1050 ℃ after absorbing heat through horizontal corrugated flues on two sides of the vertical corrugated membrane type walls, the superheater and the convection bank in the convection flue are well protected, the operation time of the boiler is prolonged, and the maintenance cost of the boiler is reduced.
Thirdly, the method comprises the following steps: through the technical innovation, the consumption of steel can be obviously saved, the operation cost is effectively saved, and the market competitiveness of boiler products is improved.
Fourthly: the lower surface and the upper surface of the top corrugated membrane wall are heated, the middle of the top corrugated membrane wall is heated to the maximum, and the top corrugated membrane wall is integrally of a V-shaped structure with a low middle part and high left and right sides, so that the effect that a heated steam-water mixture naturally flows from the middle to the upper left and the upper right can be achieved. The vertical corrugated membrane type wall divides the top horizontal channel into at least two horizontal corrugated flues left and right, so that the heat exchange contact surface with high-temperature flue gas can be further improved, and the structural strength of the top corrugated membrane type wall is improved.
Fifth, the method comprises the following steps: the combustor can move back and forth in the groove-shaped track arranged on the inner wall of the installation guide pipe, and the length of the rear end of the combustor extending into the hearth can be further adjusted under the condition that the gas injection amount of the combustor is fixed, namely the depth of the injected flame in the hearth is adjusted; the combustor designs the soft connection structure of three sections, and inside last festival stretched into furnace to through two telescopic adjusting rod adjustable last festival's jet flame's direction, and have the effect of location combustor position in the installation pipe. Thereby improving the matching degree of the burner and boilers with different models and sizes, and increasing the evaporation capacity of the boiler compared with the traditional D-shaped boiler burner.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is a top view of fig. 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in figures 1-3, the curved hearth of the natural gas-fired boiler of the invention comprises a burner 1 and a furnace body 2 with a water-cooling membrane wall, a round hole 3 is arranged on the water-cooling membrane wall at the front side of the furnace body 2, a mounting conduit 4 which is corresponding to the round hole 3 and is through is fixedly arranged outside the water-cooling membrane wall at the front side of the furnace body 2, the mounting conduit 4 is horizontally arranged along the front-back direction, a tail corrugated membrane wall 5 is vertically arranged at the rear side in the furnace body 2, a top corrugated membrane wall 6 is horizontally arranged in the furnace body 2, the rear side of the top corrugated membrane wall 6 is connected with the upper side of the tail corrugated membrane wall 5, the left side and the right side of the top corrugated membrane wall 6 are respectively connected with the water-cooling membrane wall at the left side and the right side of the furnace body 2, a tail water-cooling wet-back flue 7 is formed between the rear side of the tail corrugated membrane wall 5 and the water-cooling membrane wall at the rear side of the, a flue gas turning channel 8 communicated with the front side of the top horizontal channel is arranged between the front side edge of the top corrugated membrane type wall 6 and the water-cooling membrane type wall on the front side of the furnace body 2, and the burner 1 is arranged in the mounting guide pipe 4 and penetrates through the circular hole 3 to spray flame to the interior of the hearth.
The top corrugated film type wall 6 is integrally of a V-shaped structure with a low middle part and high left and right sides, at least one vertical corrugated film type wall 9 is arranged between the top of the top corrugated film type wall 6 and the water-cooling film type wall at the top of the furnace body 2, and the vertical corrugated film type wall 9 divides a top horizontal channel into at least two horizontal corrugated flues 10.
The water-cooling membrane type walls around the furnace body 2 at the front side of the tail corrugated membrane type wall 5 are all corrugated membrane type wall structures; the tail corrugated film type wall 5, the top corrugated film type wall 6, the vertical corrugated film type wall 9 and the corrugated film type wall structure on the periphery of the furnace body 2 are all straight tube film type walls formed by welding steel tubes and flat steel, and the straight tube film type walls are bent into a wave curved surface shape through a wave-shaped mould.
The combustor 1 consists of three sections, two adjacent sections of cylindrical shells are coaxially connected through a flexible connecting pipe 11, the inner wall of the installation conduit 4 is provided with a plurality of groove-shaped rails 12 along the axis direction, the outer circle of the cylindrical shell of the combustor 1 is provided with rollers 13 rolling along the groove-shaped rails 12, and the outer circumference of the rear side of the middle section of the combustor 1 is provided with a heat-insulating material 14 in sliding fit with the inner wall of the installation conduit 4 and the groove-shaped rails 12;
two telescopic adjusting rods 15 are arranged between the inner wall of the water-cooling membrane type wall on the front side of the furnace body 1 and the burner 1, the upper ends of the two telescopic adjusting rods 15 are connected with the water-cooling membrane type wall on the front side of the furnace body 1 through upper universal hinges, the lower ends of the two telescopic adjusting rods 15 are connected with the upper portion of the last section of the burner 1 through lower universal hinges, the two telescopic adjusting rods 15 are all obliquely arranged, and the two telescopic adjusting rods 15 are symmetrically arranged on the left and right of the central line of the installation guide pipe 4.
The telescopic adjusting rod 15 comprises an internal thread sleeve and a screw rod extending into and in threaded connection with the internal thread sleeve.
The working principle of the invention is as follows: the natural gas is through the flue gas that produces of burner 1 flame spun backward after the burning in corrugate furnace thorax, backward flow around flame (the flue gas can cool off flame around flame, reduce nitrogen oxide's production), through flue gas turn to passageway 8 upwards to get into to the at least two horizontal ripple flues 10 of top horizontal passage in, the flue gas flows to afterbody water-cooling wet back flue 7 backward, and inside rethread air current turns to passageway 21 and gets into convection bank 16, the flue gas is through scouring over the superheater and 16 back discharge port 17 boilers of convection bank. The water-cooling film wall of the furnace body 2 absorbs the temperature of the flue gas, the temperature is taken away by circulating water in the water-cooling film wall, the flue gas is finally collected into the upper boiler barrel 18, feed water enters the convection bank 16 through the upper boiler barrel 18 and then enters the lower boiler barrel 19, after passing through a steam-water separation device in the upper boiler barrel 18, steam is used by a user, and the water enters the circulation of the convection bank 16 and the water-cooling film wall. The water-cooling film type wall at the rear side of the furnace body 1 is provided with an access hole 20. The double arrows in the figure indicate the flue gas flow direction, and the single arrows indicate the flow direction of the steam water in the membrane wall.
The invention has the following beneficial effects:
firstly, as the redundant space in the hearth of the existing boiler is added with the tail corrugated film type wall 5, the top corrugated film type wall 6 and the vertical corrugated film type wall 9, the utilization of the redundant space is carried out, the volume of the boiler body 2 can be obviously reduced, the large-scale boiler is convenient, and the overall transportation cost is reduced;
secondly, the method comprises the following steps: the tail corrugated membrane type wall 5 is arranged inside, the top corrugated membrane type wall 6 and the vertical corrugated membrane type wall 9 are arranged inside the boiler, the flowing time of smoke inside the boiler is prolonged, meanwhile, the corrugated water-cooling membrane type walls can multiply increase the heating area in a unit space, the evaporation capacity of the boiler can be improved by more than 30% in the same volume, the boundary layer of the smoke with good design of a corrugated structure can be used for strengthening heat transfer, the heat of the high-temperature smoke coming out from a hearth can be reduced by absorbing more heat, the smoke can be reduced to about 1050 ℃ after absorbing heat through the horizontal corrugated flues 10 on two sides of the vertical corrugated membrane type wall 9, the superheater and the convection bank 16 in the convection flues are well protected, the operation time of the boiler is prolonged, and the maintenance cost of the boiler is reduced.
Thirdly, the method comprises the following steps: through the technical innovation, the consumption of steel can be obviously saved, the operation cost is effectively saved, and the market competitiveness of boiler products is improved.
Fourthly: the lower surface and the upper surface of the top corrugated membrane wall 6 are heated, wherein the middle part of the top corrugated membrane wall 6 is heated to the maximum, and the whole top corrugated membrane wall 6 is of a V-shaped structure with a low middle part and high left and right sides, so that the effect that a heated steam-water mixture naturally flows from the middle part to the upper left and the upper right can be achieved. The vertical corrugated membrane type wall 9 divides the top horizontal channel into at least two horizontal corrugated flues 10 left and right, so that the heat exchange contact surface with high-temperature flue gas can be further improved, and the structural strength of the top corrugated membrane type wall 6 is improved.
Fifth, the method comprises the following steps: the combustor 1 can move back and forth in the groove-shaped track 12 arranged on the inner wall of the installation guide pipe 4, and under the condition that the air injection quantity of the combustor 1 is certain, the length of the rear end of the combustor 1 extending into the hearth can be further adjusted, namely the depth of the injected flame in the hearth can be adjusted; the combustor 1 is designed into a three-section soft connection structure, the last section extends into the hearth, the direction of the spraying flame of the last section can be adjusted through two telescopic adjusting rods 15, and the combustor has the function of positioning the combustor 1 in the installation guide pipe 4. Thereby improving the matching degree of the combustor 1 and boilers with different models and sizes, and increasing the evaporation capacity of the boiler compared with the traditional D-shaped boiler combustor.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a fire curved surface furnace of natural gas boiler, includes the furnace body of combustor and water-cooling membrane type wall, has seted up round hole, its characterized in that on the water-cooling membrane type wall of furnace body front side: the outside of the water-cooling membrane type wall of furnace body front side is fixed and is equipped with one and corresponds penetrating installation pipe with the round hole, the installation pipe sets up along the fore-and-aft direction level, the vertical afterbody ripple membrane type wall that is equipped with of rear side in the furnace body, the level is equipped with top ripple membrane type wall in the furnace body, top ripple membrane type wall rear side is connected with the last side of afterbody ripple membrane type wall, the left side and the right side of top ripple membrane type wall respectively with the water-cooling membrane type wall on the left water-cooling membrane type wall of furnace body and the water-cooling membrane type wall on right side be connected, form afterbody water-cooling wet back flue between the water-cooling membrane type wall of afterbody ripple membrane type wall rear side and furnace body rear side, form top horizontal channel between the water-cooling membrane type wall on top ripple membrane type wall's top and the furnace body top, the flue gas that has between the water-cooling membrane type wall of.
2. The curved hearth of a natural gas-fired boiler according to claim 1, wherein: the top corrugated film type wall is integrally of a V-shaped structure with a low middle part and high left and right sides, at least one vertical corrugated film type wall is arranged between the top of the top corrugated film type wall and the water-cooled film type wall at the top of the furnace body, and the vertical corrugated film type wall divides a top horizontal channel into at least two horizontal corrugated flues.
3. The curved hearth of a natural gas-fired boiler according to claim 1 or 2, wherein: the water-cooling membrane type walls around the furnace body on the front side of the corrugated membrane type wall at the tail part are all of a corrugated membrane type wall structure; the tail corrugated film type wall, the top corrugated film type wall, the vertical corrugated film type wall and the corrugated film type wall structure on the periphery of the furnace body are all straight tube film type walls formed by welding steel tubes and flat steel, and the straight tube film type walls are bent into a wave curved surface shape through a wavy mold.
4. The curved hearth of a natural gas-fired boiler according to claim 1 or 2, wherein: the combustor is composed of three sections, two adjacent sections of cylindrical shells are coaxially connected through a flexible connecting pipe, a plurality of groove-shaped rails are arranged on the inner wall of the installation conduit along the axis direction, rollers rolling along the groove-shaped rails are arranged on the excircle of the cylindrical shell of the combustor, and heat-insulating materials in sliding fit with the inner wall of the installation conduit and the groove-shaped rails are arranged on the outer circumference of the rear side of the middle section of the combustor;
two telescopic adjusting rods are arranged between the inner wall of the water-cooling membrane type wall on the front side of the furnace body and the burner, the upper ends of the two telescopic adjusting rods are connected with the water-cooling membrane type wall on the front side of the furnace body through upper universal hinges, the lower ends of the two telescopic adjusting rods are connected with the upper portion of the last section of the burner through lower universal hinges, the two telescopic adjusting rods are all obliquely arranged, and the two telescopic adjusting rods are symmetrically arranged about the central line of the installation guide pipe.
5. The curved hearth of a natural gas-fired boiler according to claim 4, wherein: the telescopic adjusting rod comprises an internal thread sleeve and a screw rod which extends into the internal thread sleeve and is in threaded connection with the internal thread sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010900881.8A CN111998331B (en) | 2020-09-01 | 2020-09-01 | Curved hearth of natural gas fired boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010900881.8A CN111998331B (en) | 2020-09-01 | 2020-09-01 | Curved hearth of natural gas fired boiler |
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| CN111998331A true CN111998331A (en) | 2020-11-27 |
| CN111998331B CN111998331B (en) | 2021-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010900881.8A Active CN111998331B (en) | 2020-09-01 | 2020-09-01 | Curved hearth of natural gas fired boiler |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2819479B2 (en) * | 1990-04-16 | 1998-10-30 | バブ日立エンジニアリングサービス株式会社 | U-type furnace boiler |
| CN203703927U (en) * | 2014-03-06 | 2014-07-09 | 浙江叶华机械制造有限公司 | Horizontal boiler |
| CN203963899U (en) * | 2014-07-23 | 2014-11-26 | 陕西鼓风机集团西安锅炉有限责任公司（西安特种汽车厂） | Carbonization gas boiler |
| CN106122937A (en) * | 2016-08-17 | 2016-11-16 | 华电电力科学研究院 | CFBB suspension curved S type curtain wall |
| CN207162503U (en) * | 2017-08-06 | 2018-03-30 | 郑州中鼎锅炉股份有限公司 | A kind of ultralow nitrogen condensing SZS type gas fired-boilers |
-
2020
- 2020-09-01 CN CN202010900881.8A patent/CN111998331B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2819479B2 (en) * | 1990-04-16 | 1998-10-30 | バブ日立エンジニアリングサービス株式会社 | U-type furnace boiler |
| CN203703927U (en) * | 2014-03-06 | 2014-07-09 | 浙江叶华机械制造有限公司 | Horizontal boiler |
| CN203963899U (en) * | 2014-07-23 | 2014-11-26 | 陕西鼓风机集团西安锅炉有限责任公司（西安特种汽车厂） | Carbonization gas boiler |
| CN106122937A (en) * | 2016-08-17 | 2016-11-16 | 华电电力科学研究院 | CFBB suspension curved S type curtain wall |
| CN207162503U (en) * | 2017-08-06 | 2018-03-30 | 郑州中鼎锅炉股份有限公司 | A kind of ultralow nitrogen condensing SZS type gas fired-boilers |
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| Publication number | Publication date |
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| CN111998331B (en) | 2021-08-20 |
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