CN217816688U - Hearth system of gas boiler - Google Patents
Hearth system of gas boiler Download PDFInfo
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- CN217816688U CN217816688U CN202221819952.2U CN202221819952U CN217816688U CN 217816688 U CN217816688 U CN 217816688U CN 202221819952 U CN202221819952 U CN 202221819952U CN 217816688 U CN217816688 U CN 217816688U
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- collecting box
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Abstract
The utility model discloses a gas boiler's furnace system, furnace system's front end is provided with the combustor, and furnace system and gas boiler's convection system are connected, and furnace system's inside includes: the system comprises a first upper longitudinal collecting tank and a first lower longitudinal collecting tank which are arranged along the front-back direction of a hearth in a full-length mode, first side wall membrane walls which are respectively arranged on the left side and the right side of a hearth system, a first front collecting tank and a first rear collecting tank which are respectively arranged on the front side and the rear side of the hearth system, and first front wall membrane walls and first rear wall membrane walls which are respectively arranged on the front side and the rear side of the hearth system. The utility model discloses, the material environmental protection, the burning is even, and the thermal efficiency is high, can make flame the filling degree best in furnace, stops enough long combustion time in order to guarantee that fuel burns out to obtain the best combustion state of ultralow NOx emission numerical value.
Description
Technical Field
The utility model relates to a gas steam boiler, concretely relates to gas boiler's furnace system.
Background
In the current market, blue sky engineering is advocated in each large city in China in recent ten years, large-scale gas-steam boilers are used as heat source requirements in the initial starting stage of production steam and power plants in large-scale use, particularly, the low-nitrogen environmental protection treatment strength which is continuously increased in recent countries is generally required to reduce NOx to 30mg/Nm 3 In the following, the integral gas boiler designed in the early stage has the characteristics of outstanding integral transportation, compact structure and small occupied area, the smaller furnace chamber size cannot meet the requirement of low-nitrogen combustion, and the bulk boiler cannot meet the difficulties of tight field installation period of a user, so that an energy-saving and environment-friendly new product with large furnace chamber size, suitable road transportation of the integral furnace body size, low steel consumption, high efficiency, stable and reliable performance needs to be innovated and developed to replace the original furnace type product.
The traditional integral gas boiler is generally divided into two furnace body parts, namely a boiler body and a coal economizer. The size of the hearth is small, and the NOx of tail flue gas can not be reduced to 30mg/Nm 3 In the bulk boiler, the field installation period is long, the equipment quality cannot be completely guaranteed, and the one-time investment cost of the equipment is high.
In view of the foregoing, there is a need in the market for a more efficient and environmentally friendly furnace system for a gas steam boiler.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the prior art lacks the problem of big furnace and low-nitrogen high-efficient, environmental protection and energy saving's medium and large-scale assembled gas steam boiler furnace system.
In order to solve the technical problems, the technical proposal adopted by the utility model is to provide a hearth system of a gas boiler, wherein the front end of the hearth system is provided with a burner, the hearth system is connected with a convection system of the gas boiler,
the inside of the hearth system comprises: the first upper longitudinal collecting box and the first lower longitudinal collecting box which are arranged along the longitudinal direction of the hearth, the first side wall membrane type walls which are respectively arranged on the left side and the right side of the hearth system, the first front collecting box and the first lower longitudinal collecting box which are respectively arranged on the front side and the back side of the hearth system, and the first front wall membrane type walls and the first back wall membrane type walls which are respectively arranged on the front side and the back side of the hearth system, wherein the first upper longitudinal collecting box, the first lower longitudinal collecting box, the first side wall membrane type walls and the first front wall membrane type walls are mutually enclosed to form a closed flue gas space of the hearth system, and the inner sides of the tube walls of the first upper longitudinal collecting box, the first lower longitudinal collecting box, the first front collecting box, the first back collecting box, the first side wall membrane type walls and the first front wall membrane type walls form a first circulation water path.
In the above scheme, the first side wall membrane wall is respectively connected with the first upper longitudinal header and the first lower longitudinal header, the first front header is respectively connected with the first upper longitudinal header and the first lower longitudinal header, the first rear header is respectively connected with the first upper longitudinal header and the first lower longitudinal header, and the first front and rear wall membrane wall is connected between the first front header and the first rear header.
In the above scheme, an upper steam pocket is arranged above the convection system, an outlet flue of the hearth system is arranged at the tail part of the first side wall membrane type wall on the right side, the hearth system is connected with the upper steam pocket through an air duct to form a steam path communication, and the hearth system is connected with a second communicating pipe in the convection system through a first communicating pipe to form a water path communication.
In the scheme, the left outer wall of the hearth system is provided with the observation hole, and the top of the left outer wall in the hearth system is provided with the explosion door.
In the scheme, the hearth system and the convection system both adopt full-diaphragm type walls.
In the scheme, the section of the hearth is hexagonal or circular.
In the above scheme, the hearth system is cuboid in shape, and comprises a section steel frame and a first outer guard plate outside.
The utility model discloses, the material environmental protection, the burning is even, and the thermal efficiency is high, can make flame degree of fullness in furnace best, stops enough long combustion time in order to guarantee that fuel burns out to obtain the best combustion state of ultralow NOx emission numerical value.
Drawings
FIG. 1 is a schematic front view of the appearance structure of the present invention;
fig. 2 is a left side view schematically illustrating the external structure of the present invention;
fig. 3 is a schematic top view of the external structure of the present invention;
fig. 4 is a schematic top view of the internal structure of the convection system of the present invention;
FIG. 5 is a schematic side view of the internal structure of the furnace system of the present invention;
fig. 6 is a schematic side view of the internal structure of the convection system of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The utility model discloses a convection system of gas boiler, this text content can be referred to the technical staff in this field, and proper improvement technological parameter realizes. It is expressly noted that all such similar substitutes and modifications apparent to those skilled in the art are deemed to be included in the invention and it is apparent to those skilled in the art that the inventive technique can be practiced and applied by modifying or appropriately combining the teachings herein without departing from the spirit and scope of the invention.
In utility model, unless otherwise specified, scientific and technical terms used herein have the meaning commonly understood by a person skilled in the art.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
It should be noted that, in the description of the present invention, the terms "first" and "second" are only used for convenience of describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.
As shown in fig. 1 to 6, the utility model provides a gas boiler's furnace system 1's inside includes: the hearth system comprises a first upper longitudinal collecting box 1-1 and a first lower longitudinal collecting box 1-2 which are arranged in a through-length mode along the front and back direction of a hearth, first side wall membrane type walls 1-5 which are respectively arranged on the left side and the right side of a hearth system 1, first front collecting boxes 1-3 and first rear collecting boxes 1-4 which are respectively arranged on the front side and the back side of the hearth system 1, and first front and rear wall membrane type walls 1-6 which are respectively arranged on the front side and the back side of the hearth system 1, wherein the first upper longitudinal collecting box 1-1, the first lower longitudinal collecting box 1-2, the first side wall membrane type walls 1-5 and the first front and rear wall membrane type walls 1-6 are mutually enclosed to form a closed flue gas space of the hearth system 1, the first upper longitudinal collecting box 1-1, the first lower longitudinal collecting box 1-2, the first front collecting box 1-3, the first rear collecting box 1-4, the first side wall membrane type walls 1-5 and the inner sides of the first front and rear wall membrane type walls 1-6 form a first circulating water path, the appearance of the hearth system 1 is a cuboid, and the outer steel frame is 8;
the first side wall membrane type wall 1-5 is respectively connected with a first upper longitudinal collecting box 1-1 and a first lower longitudinal collecting box 1-2, the first front collecting box 1-3 is respectively connected with a first upper longitudinal collecting box 1-1 and a first lower longitudinal collecting box 1-2, the first rear collecting box 1-4 is respectively connected with a first upper longitudinal collecting box 1-1 and a first lower longitudinal collecting box 1-2, and the first front and rear wall membrane type wall 1-6 is connected between the first front collecting box 1-3 and the first rear collecting box 1-4;
an outlet flue of the hearth system 1 is arranged at the tail part of a first side wall membrane type wall 1-5 on the right side, the hearth system 1 is connected with an upper steam pocket 2-1 through an air duct 6 to form a steam path communication, the hearth system 1 is connected with a second communicating pipe 2-7 in the convection system 2 through a first communicating pipe 1-7 to form a water path communication, the first communicating pipe 1-7 is connected with a first lower longitudinal header 1-2, and the second communicating pipe 2-7 is connected with a second lower header 2-3.
A fire observation hole is formed in the left outer wall of the hearth system 1, explosion-proof doors 1-9 and temperature and pressure measuring point devices are arranged at the top of the left outer wall in the hearth system 1, measuring and controlling instruments for measuring and controlling actual operation parameters of a hearth during boiler operation can be conveniently installed, the hearth system 1 and the convection system 2 both adopt full-screen membrane type walls, and the cross section of the hearth is hexagonal and circular.
The convection system 2 comprises an external steel frame and a second external guard plate 2-10;
a superheater component 2-6 is arranged at a smoke inlet of the convection system 2, an upper steam pocket 2-1 is connected with the superheater component 2-6 to exchange heat of generated saturated steam into superheated steam, and the superheater component 2-6 is connected to an outer pipe network;
a third communicating pipe 2-9 is arranged along the front-back direction of the convection system 2 in a through manner, and the upper steam drum 2-1 is connected with a second upper header 2-2 through the third communicating pipe 2-9;
the smoke inlet of the convection system 2 is arranged on the left side of the second side wall membrane wall 2-4, the smoke inlet of the convection system 2 is connected with the outlet flue of the hearth system 1, and the smoke outlet of the convection system 2 is arranged at the front end of the right side of the second side wall membrane wall 2-4 and connected with the turning flue 8.
The utility model discloses, the soda system passes through pipeline interconnect, and flue gas system then utilizes the intercommunication flue to connect. The welding workload is less when the boiler is installed and assembled on site, and the installation is convenient.
Preferably, the burner is positioned at the front end of the system, the flame combusted after the natural gas and the air are mixed burns in the space, the cross section of the hearth is hexagonal-like circular, each inch of space designed by the circular-like hearth is fully utilized, and the flame obtains the optimal fullness state in the hearth, so that the ultralow NOx burner can better exert the ultralow NOx combustion performance. And the high-temperature flue gas flows to the convection system through an outlet flue at the tail part of the right-side wall membrane wall.
Preferably, the left and right side membrane walls are of a whole screen structure without intermediate partition walls, so that the heat exchange effect of the boiler is improved, and the use of masonry materials is reduced. The high-temperature flue gas enters the convection system through the inlet flue and then enters the turning flue after rushing forwards from the back to the flue outlet.
The whole water flow is as follows: the system water feeding pipe 10 → the economizer system 3 → the body water feeding pipe 5 → the upper steam pocket 2-1 → the third communicating pipe 2-9 → the convection system 2 → the second communicating pipe 2-7 → the first communicating pipe 1-7 → the furnace system 1, and the superheated steam is generated after the saturated steam is generated and enters the superheated steam pipe through the steam guide pipe 6 → the upper steam pocket 2-1 → the superheater assembly 2-6 to be heated, and the superheated steam is sent into the outer pipe network.
The whole flue gas flow is as follows: the natural gas enters the middle area of the hearth system 1 through the front burner 4 in the hearth system 1, is mixed with air and combusted to generate high-temperature flue gas → an outlet flue of the hearth system 1 → a smoke inlet of the convection system 2 → the superheater assembly 2-6 → the convection tube bank 2-5, and passes through a smoke outlet of the convection system 2 → a turning flue 8 → the economizer system 3 → a flue outlet of the economizer system 3 after heat exchange.
The utility model has the advantages that:
1. according to the flue gas nitrogen oxide in the market is less than 30mg/Nm 3 Environmental protection emission standard design, 1 ultra-low NOx combustor are installed in furnace system front end, and under the condition that satisfies flame length and diameter, big furnace, flame temperature is lower more, and NOx production is directly proportional with flame temperature, and can sharply rise when exceeding 1100 ℃, but increase furnace will certainly exert an influence to boiler overall dimension, whole transportability, the utility model discloses a furnace volume heat load control is at 600-670kw/m 3 In the meantime.
2. And the hoisting weight of the single equipment is greatly reduced by field assembly, the requirement of the transportation limit of the equipment is met, and the field assembly is simple and convenient.
3. By adopting a full-film water-cooled wall technology, all the external wall tubes are completely filmed, and the thermal stability and the heat-insulating sealing property of the furnace body are greatly improved; meanwhile, the design of no fire-resistant furnace wall not only greatly reduces the weight of the furnace body, but also indirectly improves the energy-saving and environment-friendly level of the product without using fire-resistant materials which are produced with high pollution and high energy consumption.
The utility model discloses, the material environmental protection, the burning is even, and the thermal efficiency is high, can make flame the filling degree best in furnace, stops enough long combustion time in order to guarantee that fuel burns out to obtain the best combustion state of ultralow NOx emission numerical value.
The utility model discloses not confine above-mentioned best mode to, anybody should learn the structural change who makes under the enlightenment of the utility model, all with the utility model discloses have the same or close technical scheme, all fall into within the protection scope of the utility model.
Claims (7)
1. A hearth system of a gas boiler is characterized in that a burner is arranged at the front end of the hearth system, the hearth system is connected with a convection system of the gas boiler,
the inside of furnace system includes: the first upper longitudinal collecting box and the first lower longitudinal collecting box which are arranged along the longitudinal direction of the hearth, the first side wall membrane type walls which are respectively arranged on the left side and the right side of the hearth system, the first front collecting box and the first lower longitudinal collecting box which are respectively arranged on the front side and the back side of the hearth system, and the first front wall membrane type walls and the first back wall membrane type walls which are respectively arranged on the front side and the back side of the hearth system, wherein the first upper longitudinal collecting box, the first lower longitudinal collecting box, the first side wall membrane type walls and the first front wall membrane type walls are mutually enclosed to form a closed flue gas space of the hearth system, and the inner sides of the tube walls of the first upper longitudinal collecting box, the first lower longitudinal collecting box, the first front collecting box, the first back collecting box, the first side wall membrane type walls and the first front wall membrane type walls form a first circulation water path.
2. The furnace system of a gas boiler according to claim 1, wherein said first side wall membrane wall is connected to said first upper longitudinal header and said first lower longitudinal header, respectively, said first front header is connected to said first upper longitudinal header and said first lower longitudinal header, respectively, said first rear header is connected to said first upper longitudinal header and said first lower longitudinal header, respectively, and said first front-rear wall membrane wall is connected between said first front header and said first rear header.
3. The gas boiler furnace system according to claim 1, wherein an upper steam pocket is provided above the convection system, an outlet flue of the furnace system is provided at a rear portion of the first sidewall membrane wall on the right side, the furnace system is connected with the upper steam pocket through a gas duct to form a steam path communication, and the furnace system is connected with a second communication pipe in the convection system through a first communication pipe to form a water path communication.
4. The furnace system of the gas boiler according to claim 1, wherein a viewing hole is provided on a left outer wall of the furnace system, and an explosion vent is provided on a top of the left outer wall in the furnace system.
5. The furnace system of a gas boiler according to claim 1, wherein the furnace system and the convection system are all full-film walls.
6. The furnace system of a gas boiler according to claim 1, characterized in that the furnace cross-section is hexagonal-like or circular-like.
7. The furnace system of a gas boiler according to claim 1, wherein the furnace system has a rectangular parallelepiped shape and includes a steel frame and a first outer shield on the outside thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221819952.2U CN217816688U (en) | 2022-07-14 | 2022-07-14 | Hearth system of gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221819952.2U CN217816688U (en) | 2022-07-14 | 2022-07-14 | Hearth system of gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217816688U true CN217816688U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221819952.2U Active CN217816688U (en) | 2022-07-14 | 2022-07-14 | Hearth system of gas boiler |
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| Country | Link |
|---|---|
| CN (1) | CN217816688U (en) |
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2022
- 2022-07-14 CN CN202221819952.2U patent/CN217816688U/en active Active
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