CN210718054U - Corner tube type gas boiler - Google Patents
Corner tube type gas boiler Download PDFInfo
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- CN210718054U CN210718054U CN201921085512.7U CN201921085512U CN210718054U CN 210718054 U CN210718054 U CN 210718054U CN 201921085512 U CN201921085512 U CN 201921085512U CN 210718054 U CN210718054 U CN 210718054U
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- boiler
- hearth
- boiler body
- wall
- membrane
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Abstract
The utility model relates to an angle tube type gas boiler, belonging to the field of heat energy engineering application equipment, in particular to an angle tube type gas boiler with a burner at the bottom; the boiler comprises a boiler body, a hearth, a convection flue, a boiler barrel, a burner, a membrane water-cooled wall, a flag-type convection heating surface and an energy saver; through the utility model discloses a design provides a full play angle pipe formula boiler and low nitrogen gas burner's advantage, satisfies the requirement of low nitrogen burner to boiler furnace structure, changes in the realization of low nitrogen burning, has filled a blank in the gas industry boiler, adapts to the gas boiler of the requirement of national low NOx's emission to gas boiler.
Description
Technical Field
The utility model belongs to heat energy engineering application apparatus field, in particular to corner tube gas boiler who puts at bottom of combustor.
Background
The angle tube boiler is a novel boiler with novel structure, low metal consumption and high technical content, and has compact structure, steel saving, and convenient assembly and integral installation. The corner tube boiler has the characteristics that: the full water pipe is fully welded, the membrane wall structure is adopted, the sealing performance is good, and the air leakage is less; the pipe laying type light furnace wall has the advantages that the boiler is started quickly, and the standby loss is small; the reliable water circulation structure has good power failure protection performance for the hot water boiler, and can prevent the water of the boiler from being gasified without taking special measures; a body steel frame is not needed, and self-supporting is adopted; and steel is saved, so that the cost is reduced, and the market competitiveness is increased.
The existing gas boiler burner is horizontally arranged at the front part of a boiler, the outlet of a hearth is the upper rear part of the hearth, and the hearth fullness degree of flame is not high. The arrangement mode of the burner and the structure of the hearth are unfavorable for the currently generally adopted low-nitrogen combustion with internal circulation of flue gas.
Therefore, there is a need in the art for a new solution to solve these problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: provided is a gas boiler which can ensure sufficient fuel combustion, easily realize low-nitrogen combustion and ensure that emissions meet national regulations.
An angle tube type gas boiler is characterized in that: the boiler comprises a boiler body, a burner, a membrane water-cooled wall, a flag-type convection heating surface and an energy saver;
the outer wall and the inner cavity of the boiler body are both provided with membrane water-cooled walls, and the membrane water-cooled walls arranged in the inner cavity of the boiler body divide the inner space of the boiler body into a hearth and a convection flue;
wherein the area of the cross section of the hearth space is gradually reduced from top to bottom;
wherein the area of the cross section of the space of the convection flue is gradually increased from top to bottom;
the membrane water-cooled wall is formed by welding a hollow circular tube with the model phi 60 and flat steel, and the pitch of the membrane water-cooled wall is 80 mm; the membrane type water-cooled walls are connected with a boiler barrel on the boiler body through communicating pipes;
the bottom of the boiler body is also provided with a burner;
the edge of the bottom plate of the hearth descends to the center at a fixed gradient, the geometric center of the bottom plate is provided with an outlet of a burner, and the axis of the outlet of the burner is vertical to the horizontal plane;
wherein the gradient of the bottom plate of the hearth is 1: 10;
a flag type convection heating surface is arranged in the convection flue;
the energy saver is connected with the convection flue, and an internal pipeline of the energy saver is connected with the boiler barrel on the boiler body through a communicating pipe.
The boiler body is of a frame structure, and a single-drum horizontal boiler is arranged.
The energy saver adopts a spiral finned tube bundle structure with an expanded heating surface, the tube bundle is a boiler special tube with the model diameter of phi 51, and the boiler special tube is made of corrosion-resistant ND steel 09 CrCuSb.
The surface of the membrane type water-cooled wall of the outer wall of the boiler body is provided with a light heat-insulating material layer with the thickness of 160mm, and the light heat-insulating material layer is further covered with a corrugated color steel plate layer.
The membrane water-cooled walls are arranged in a horizontal in-line manner.
Through the above design scheme, the utility model discloses following beneficial effect can be brought: through the utility model discloses a design provides a full play angle pipe formula boiler and low nitrogen gas burner's advantage, satisfies the requirement of low nitrogen burner to boiler furnace structure, changes in the realization of low nitrogen burning, has filled a blank in the gas industry boiler, adapts to the gas boiler of the requirement of national low NOx's emission to gas boiler.
Drawings
The invention is further described with reference to the following drawings and detailed description:
fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1-a boiler body, 101-a hearth, 102-a convection flue, 103-a drum, 2-a burner, 3-a membrane wall, 4-a flag-type convection heating surface and 5-an energy saver.
Detailed Description
As shown in fig. 1, an angle tube type gas boiler is characterized in that: the boiler comprises a boiler body 1, a combustor 2, a membrane water-cooled wall 3, a flag-type convection heating surface 4 and an energy saver 5;
the outer wall and the inner cavity of the boiler body 1 are both provided with membrane water walls 3, and the membrane water walls 3 arranged in the inner cavity of the boiler body 1 divide the inner space of the boiler body 1 into a hearth 101 and a convection flue 102; the furnace hearth is arranged in an n-shaped manner, the front part of the boiler body 1 is a furnace hearth 101, and the rear part of the boiler body 1 is a convection flue 102; positive pressure combustion can be achieved.
Wherein the area of the space cross section of the hearth 101 is gradually reduced from top to bottom;
wherein the area of the cross section of the space of the convection flue 102 is gradually increased from top to bottom;
the membrane water-cooled wall 3 is formed by welding a hollow circular tube with the model phi 60 and flat steel, and the pitch of the membrane water-cooled wall 3 is 80 mm; the membrane type water-cooled walls 3 are connected with a boiler barrel 103 on the boiler body 1 through communicating pipes;
the bottom of the boiler body 1 is also provided with a burner 2;
the edge of a bottom plate of the hearth 101 descends to the center at a fixed gradient, an outlet of the combustor 2 is arranged at the geometric center of the bottom plate, and the axis of the outlet of the combustor 2 is vertical to the horizontal plane;
wherein the gradient of the bottom plate of the hearth 101 is 1: 10;
a flag type convection heating surface 4 is arranged in the convection flue 102;
the economizer 5 is connected with the convection flue 102, and the inner pipeline of the economizer 5 is connected with the drum 103 on the boiler body 1 through a communicating pipe.
The boiler body 1 is of a frame structure, a single-drum horizontal boiler can generate industrial steam (a steam boiler) or hot water for heating (a hot water boiler)
The energy saver 5 adopts a tube bundle structure with spiral fins and an expanded heating surface, the tube bundle is a boiler special tube with the model diameter of phi 51, and the boiler special tube is made of corrosion-resistant ND steel 09 CrCuSb.
The surface of the membrane type water-cooled wall 3 of the outer wall of the boiler body 1 is provided with a light heat-insulating material layer with the thickness of 160mm, and the light heat-insulating material layer is further covered with a corrugated color steel plate layer.
The membrane water walls 3 are arranged in a horizontal in-line manner.
The periphery of a hearth 101 of the boiler body 1 is provided with a membrane water wall 3 full-sealing structure, and positive pressure combustion can be realized in the hearth 101. The membrane water-cooling wall 3 is formed by welding phi 60 pipes and flat steel through special equipment, and the pitch of the membrane water-cooling wall 3 is 80 mm. High-temperature flue gas generated after combustion is folded towards the convection flue 102 from a rear wall diluted tube bundle formed by the membrane water wall 3 of the hearth 101 by 180 degrees. A group of flag type convection heating surfaces 4 special for corner tube boilers are arranged in the convection flue 102, and the flag type convection heating surfaces 4 are arranged in a horizontal in-line mode. The water flow direction of all heating surfaces of the boiler is ascending and is consistent with the direction of heat power, and the water circulation safety of the boiler is ensured to the maximum extent.
The outlet of the burner 2 is horizontally upward, the positive flame is kept vertically upward and is consistent with the water circulation direction of the hearth 101, the hearth of the flame is high in fullness, and the flue gas flow field is balanced. Meanwhile, the geometric center of the bottom plate from the edge of the bottom plate of the hearth 101 to the outlet of the burner 2 is 1:10, the structure of the furnace fully meets the requirements of the internal circulation type low-nitrogen burner and the injection type low-nitrogen burner on the structure of the hearth. The hearth 101 space is big, and the hearth 101 water-cooling degree is high, and the flue gas temperature that is close to boiler body 1 wall is lower, and the formation of easy flue gas circulation in the stove can effectively reduce NOx's formation. The mechanism of NOx generated during combustion of natural gas shows that the main technical measure for reducing the NOx emission of a gas boiler is to reduce the thermal NOx generation, namely to control the temperature of a hearth 101.
The boiler body 1 is of a frame structure, a single boiler barrel is transversely arranged, the boiler body is supported on a boiler foundation through four supporting points welded on lower headers of left and right side walls, the periphery and middle partition walls of the boiler body 1 are all of a membrane water-cooled wall 3 full-sealing structure, and the boiler barrel 103 is arranged at the top of a rear wall of the boiler body 1. The boiler comprises a boiler barrel 103, 4 side water-cooled wall headers and 4 downcomers arranged at four corners of the boiler to form an integral bearing frame. The boiler has the advantages of strength, rigidity, stability and tightness, classical and elastic overall arrangement, and seismic intensity resistance of the boiler is more than 8 grades.
The top in the vertical shaft convection flue 102 at the tail part of the boiler body is a steering chamber, the flag type convection heating surface 4 is sequentially arranged at the lower part, the flag type convection heating surface 4 adopts a variable cross-section composite equal flow rate design (patent number and name 200610043132.8 corner tube type boiler flag type convection heating surface composite equal flow rate design method), the hearth 101 and the convection flue 102 are divided by the rear wall of the hearth of the membrane water wall 3, the hearth 101 is gradually reduced upwards, the convection flue 102 is gradually reduced downwards, and the maximum utilization of the boiler space is realized while the high flow rate of flue gas is kept for strengthening heat exchange.
The convection heating surface of the boiler adopts a special structure of an angle tube type boiler, namely a flag type convection heating surface 4, and is arranged in the convection flue 102 in series in two stages, so that wall penetration, sealing and air leakage of the tail heating surface are greatly reduced.
An energy saver 5 is arranged at the tail of the boiler, a spiral finned tube bundle structure with an expanded heating surface is adopted, a phi 51 boiler special pipe is selected as the pipe, the material is corrosion-resistant ND steel 09CrCuSb, the waste heat of the flue gas is further recovered, the latent heat of vaporization can be recovered when the return water temperature is lower, and the thermal efficiency of the boiler is further improved.
The boiler wall is insulated, the boiler body 1 is a totally-enclosed membrane water-cooled wall structure, and light insulation materials with the thickness of 160mm are coated outside the membrane wall, so that the design insulation requirement can be met. The light heat-insulating material is fixed on the outer side of the membrane wall through round steel and a steel wire mesh welded on the fins of the membrane wall, and the corrugated color steel plate is coated outside the heat-insulating material, so that the whole boiler is attractive and tidy in appearance and easy to install.
Water circulation process (taking hot water boiler as an example)
The return water is firstly absorbed by the energy saver 5, then sent into the drum 103 through the communicating pipe, then sent into the lower collecting boxes of the membrane water-cooled walls 3 in front of and behind the hearth 101 through the down pipes communicated with the drum 103, sent into the lower collecting boxes of the membrane water-cooled walls 3 in front of and behind the hearth 101 through the left and right communicating pipes, sent into the lower collecting boxes of the membrane water-cooled walls 3 in left and right of the hearth 101 after ascending to the upper collecting boxes of the membrane water-cooled walls 3 in left and right, sent into the drum 103, then sent into the secondary flag type convection heating surface 4 on the rear wall of the channel through the communicating pipe, and finally sent out of the boiler through the water outlet pipe on the top of the boiler.
Smoke and wind flow
Cold air is pressurized by a blower and then enters a combustor 2 to be mixed with fuel gas, the mixture is combusted in a hearth 101, generated hot flue gas is turned by a turning chamber and then flows through a secondary flag type convection heating surface 4 and an energy saver 5 at the tail part, and the hot flue gas is fully absorbed by heat and then is discharged from a chimney.
The bottom of the combustor 2 is provided with the characteristics of simple, reasonable and compact structure, good sealing performance, high boiler heat efficiency, reliable operation, fast boiler starting, environmental friendliness and the like. The utility model discloses a furnace 101 geometry and thermal characteristics are far superior to other types of boilers, can greatly reduced heating power type NOx's formation. Therefore, the boiler can be used with a low-nitrogen burner with higher cost performance, and the NOx emission of the boiler can meet the requirement of the national first-line city local standard.
This use is novel to adopt the light-duty brickwork structure of full membrane formula wall, and boiler space utilization is high. The membrane type water-cooled wall 3 and the flag type convection heating surface 4 are both of welding structures, can freely expand and can freely stretch. The water circulation direction of the heated surface of the boiler is totally raised, the operation is stable and reliable, the operation maintenance is almost not needed, the safety and the stability of the operation of the boiler are improved, and huge economic benefits and social benefits are certainly brought to vast clients.
Claims (5)
1. An angle tube type gas boiler is characterized in that: the boiler comprises a boiler body (1), a combustor (2), a membrane water-cooled wall (3), a flag-type convection heating surface (4) and an economizer (5);
the outer wall and the inner cavity of the boiler body (1) are both provided with membrane water-cooled walls (3), and the membrane water-cooled walls (3) arranged in the inner cavity of the boiler body (1) divide the inner space of the boiler body (1) into a hearth (101) and a convection flue (102);
wherein the area of the space cross section of the hearth (101) is gradually reduced from top to bottom;
wherein the area of the space cross section of the convection flue (102) is gradually increased from top to bottom;
the membrane water-cooled wall (3) is formed by welding a hollow circular tube with the model of phi 60 and flat steel, and the pitch of the membrane water-cooled wall (3) is 80 mm; the membrane type water-cooled walls (3) are connected with a boiler barrel (103) on the boiler body (1) through communicating pipes;
the bottom of the boiler body (1) is also provided with a burner (2);
the edge of a bottom plate of the hearth (101) descends to the center at a fixed gradient, an outlet of the combustor (2) is arranged at the geometric center of the bottom plate, and the axis of the outlet of the combustor (2) is vertical to the horizontal plane;
wherein the gradient of the bottom plate of the hearth (101) is 1: 10;
a flag type convection heating surface (4) is arranged in the convection flue (102);
the energy saver (5) is connected with the convection flue (102), and an internal pipeline of the energy saver (5) is connected with a boiler barrel (103) on the boiler body (1) through a communicating pipe.
2. The corner tube type gas boiler as set forth in claim 1, wherein: the boiler body (1) is of a frame structure, and a single-drum horizontal boiler is arranged.
3. The corner tube type gas boiler as set forth in claim 1, wherein: the energy saver (5) adopts a tube bundle structure with spiral fins and an expanded heating surface, the tube bundle is a boiler special tube with the model diameter of phi 51, and the boiler special tube is made of corrosion-resistant ND steel 09 CrCuSb.
4. The corner tube type gas boiler as set forth in claim 1, wherein: the surface of the membrane type water-cooled wall (3) on the outer wall of the boiler body (1) is provided with a light heat-insulating material layer with the thickness of 160mm, and the light heat-insulating material layer is further covered with a corrugated color steel plate layer.
5. The corner tube type gas boiler as set forth in claim 1, wherein: the membrane water-cooled walls (3) are arranged in a horizontal in-line mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921085512.7U CN210718054U (en) | 2019-07-11 | 2019-07-11 | Corner tube type gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921085512.7U CN210718054U (en) | 2019-07-11 | 2019-07-11 | Corner tube type gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210718054U true CN210718054U (en) | 2020-06-09 |
Family
ID=70927809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921085512.7U Expired - Fee Related CN210718054U (en) | 2019-07-11 | 2019-07-11 | Corner tube type gas boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210718054U (en) |
-
2019
- 2019-07-11 CN CN201921085512.7U patent/CN210718054U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200609 Termination date: 20210711 |