CN209655301U - It is suitble to the fuel gas combustion system of multitubular boiler - Google Patents
It is suitble to the fuel gas combustion system of multitubular boiler Download PDFInfo
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- CN209655301U CN209655301U CN201822277893.0U CN201822277893U CN209655301U CN 209655301 U CN209655301 U CN 209655301U CN 201822277893 U CN201822277893 U CN 201822277893U CN 209655301 U CN209655301 U CN 209655301U
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Abstract
A kind of fuel gas combustion system of suitable multitubular boiler, it is related to the ultralow nitrogen field of combustion technology of gas fired-boiler, technical problems to be solved are that multitubular boiler NOx emission concentration is effectively reduced, it is characterised in that: stable flame pan center is equipped with a small amount of air gun, is with multiple steady combustion air ducts outside；Gas gun is placed in the outside of stable flame pan, and the spray orifice of the gas gun stretches out burner throat and spray orifice radially.Advantage is that combustion system has excellent steady combustion ability；Combustion gas is radially sprayed, and is expanded the coverage area of flame, using boiler furnace is reduced flame peak temperature to greatest extent；Yan Qi Zai Dun ring is generated in furnace simultaneously, external flue gas recirculation usage amount is reduced, accomplishes the even lower NOx emission of 30mg.
Description
Technical field
The utility model relates to the ultralow nitrogen field of combustion technology of gas fired-boiler, in particular to the fuel gas buring system of multitubular boiler
System dissipates spray regime from furnace core to burner hearth peripheral space using combustion gas, reduces furnace core flame peak temperature, reaching reduces NOx
The purpose of discharge.
Background technique
China's economy constantly develops, and the requirement of Environmental gradually becomes sternly, everybody is encouraged to make joint efforts, energy conservation drop
Consumption safeguards blue sky.Beijing area executes 30mg/Nm3Have a surplus within environmental standard existing 2 years, other domestic areas are also being received one after another
Tight standard limited value encourages user to carry out low nitrogen burning transformation.
Combustion gas 30mg/Nm at present3Low nitrogen burning mostly use low NO to add the technology path of external flue gas recirculation,
Structure, boiler furnace size and the structure of low NO air gun be influence boiler low nitrogen burning transformation drop nitrogen effect it is important because
Element.The low NO of multitubular boiler currently on the market, the combustion gas in pipette tips be mostly towards burner hearth direct-injection (Fig. 5), though rear afterflame
Burning process Flame can be diffused to periphery, but still have the boiler furnace space of part not to be fully utilized, and flame compares collection
In, cause the raw emissions of NOx high；And external flue gas recirculating technique uses, and needs to carry out external cigarette and follows component technology transformation.
Though multitubular boiler, which has, saves land occupation, the small advantage of steel consumption, the heat exchange area of burner hearth is than general water pipe pot
Small, the volume heat load height of furnace, and the heat transfer effect of multitubular boiler is worse than water-tube boiler, so multitubular boiler is more difficult to accomplish NOx
Minimum discharge (≤30mg/Nm3), especially some special multitubular boilers, such as central flame flame, cast iron multitubular boiler.
Summary of the invention
The purpose of this utility model is: providing a kind of fuel gas combustion system of suitable multitubular boiler, makes full use of fire tube pot
The furnace cavity of furnace reduces the discharge of multitubular boiler NOx on the basis of reducing external flue gas recirculation dosage as far as possible.
In order to achieve the above objectives, the technical solution adopted in the utility model is:
A kind of fuel gas combustion system of suitable multitubular boiler including boiler furnace and is placed in the antetheca of the boiler furnace
The low NO of mandrel line position, it is characterised in that: the low NO includes stable flame pan, gas gun, burner throat
With combustion air channel, the stable flame pan, gas gun, burner throat begin successively to set to external symmetry from burner centre axis
It sets；The combustion air channel is placed in burner throat；
The stable flame pan is round plate or is spiral-flow type annulus, and the stable flame pan center is axis installation through-hole, axis installation
Through-hole is built-in with a small amount of air gun, provides center ignition heat, stablizes flame；Axis installation through-hole periphery is multiple steady combustion air ducts；
The gas gun is placed in the outside of stable flame pan, and the spray orifice of the gas gun stretches out burner throat, and spray orifice is radially, combustion gas
Rifle quantity have it is multiple, be symmetrical arranged.
Further, the stable flame pan is round plate, is disposed with a small amount of air gun in the axis installation through-hole, provides center
Ignition heat stablizes flame；Multiple steady combustion air ducts are equipped on central through hole peripheral circular plate.
Further, the stable flame pan is spiral-flow type annulus, and center is axis installation through-hole, and periphery is annulus, the axis peace
It is equipped with swirl vane between dress through-hole and the peripheral annulus, a small amount of air gun is disposed in the axis installation through-hole, center is provided
Ignition heat stablizes flame；It is multiple steady combustion air ducts between the swirl vane.
The gas gun is placed in the outside of stable flame pan, the spray orifice of the gas gun stretch out burner throat and spray orifice radially towards
Outside, gas gun quantity has multiple, is symmetrical arranged；
The good effect of the utility model is: part of fuel is sprayed into a small amount of air gun in stable flame pan center, through burning torch
It ignites, provides and stablize the required central hot that burns, and under the action of stable flame pan, make the combustion system that there is excellent steady combustion
Ability；Fuel, radially towards burner hearth sidewall ejection, is covered on combustion gas whole at a certain distance from stretching out burner throat in gas gun
On the section of a boiler furnace, and under the power of burner hearth positive pressure, gradually flowed towards burner hearth tail portion, and combustion gas is radially
When spraying burner hearth, flame of centre ignites remaining fuel.The gas gun of gas injection mouth radially expands the covering model of flame
It encloses, reduces the peak temperature of flame, and then reduce the generation of NOx；Combustion gas that air layer outer boundary is gone out is penetrated in air layer
Anoxycausis in the exterior domain of boundary, i.e., dense burning, producing a large amount of reducing substances can inhibit NOx to generate；It is red-hot simultaneously
High-temperature low-oxygen amount smoke backflow is mixed to burner throat region with the high oxygen amount combustion air sprayed from combustion air channel
It closes, forms the gaseous mixture of opposite hypoxemia amount, then participate in burning again, because reducing the oxygen content of combustion-supporting gas in burning, further
A large amount of generations for reducing NOx.Simultaneously because stablizing for central hot provides, and then peripheral fuel is stablized in entire furnace chamber inner combustion, fills
Divide completely burned, the CO amount of generation is few.
Detailed description of the invention
Fig. 1 is the utility model axial direction schematic cross-sectional view；
Fig. 2 is the A of Fig. 1 to structural schematic diagram；
Fig. 3 is the structural schematic diagram of board-like stable flame pan in embodiment；
Fig. 4 is the structural schematic diagram of spiral-flow type stable flame pan in embodiment；
Fig. 5 is the fuel gas combustion system schematic diagram of prior art multitubular boiler.
In figure: 1. low NOs；11. stable flame pan；111. stable flame pan central axis installation through-hole；112. swirl vane；
113. stable flame pan periphery annulus；114. round plate 115. surely fires air duct；12. gas gun；13. burner throat；14.
Combustion air channel；2. boiler furnace；21. boiler antetheca.
Specific embodiment
With reference to the accompanying drawings of the specification and embodiment, the utility model is described in further detail.
Fig. 1 and Fig. 2 is the utility model structure diagram, by illustrating as it can be seen that a kind of fuel gas buring of suitable multitubular boiler
System, including low NO 1, boiler furnace 2, low NO 1 are arranged on the boiler antetheca 21 of boiler furnace 2；It is special
Sign is: the low NO 1 includes stable flame pan 11, gas gun 12, burner throat 13 and combustion air channel 14, described
Stable flame pan 11, gas gun 12, burner throat, 13 begin successively to be symmetrical arranged outward by burner centre axis；The combustion-supporting sky
Gas channel 14 is placed in burner throat 13.
11 main body of stable flame pan is rounded, for round plate or spiral-flow type figure ring；When stable flame pan 11 is round plate
When, 11 center of stable flame pan is axis installation through-hole 111, round plate 114 and several steady combustion air ducts being placed on round plate
115 (as shown in Figure 3)；When stable flame pan 11 is in spiral-flow type annulus, stable flame pan 11 includes central axis installation through-hole 111, steady flame
Disk periphery annulus 113 is equipped with swirl vane 112 (such as Fig. 4 institute between the central axis installation through-hole 111 and peripheral annulus 113
Show).
11 center of stable flame pan is equipped with a small amount of air gun, provides center ignition heat, stablizes flame.
The gas gun 12 stretches out burner throat 13 and gas jet orifice radially, and gas gun 12 is multiple symmetrical on demand
Setting.
When the system works, 1, gas gun stretching burner certain distance arrangement, pipette tips generate at high-temperature flue gas and boiler
It is negative relative area between front wall, high temperature gases recirculating to burner throat region carries out inner flue gas of the stove recycling and combustion-supporting sky
Gas mixing, generates the gaseous mixture of hypoxemia amount, and the gaseous mixture of hypoxemia amount burns with combustion gas again, and then reduces the discharge of NOx.Cause
Circulation in flue gas has been generated in furnace, therefore can reduce the recycled amount of the outer flue gas of furnace, mitigates the outer flue gas recirculation bring of furnace not
Benefit influences.
2, combustion gas is changed to combustion gas on the direction of burner hearth sidewall from traditional direct-injection in burner hearth to spray, combustion gas can penetrate
Air layer is covered on combustion gas on the section of entire boiler furnace, expands the overlay area of the jet flames of combustion gas, reduces fire
The peak temperature of flame.The flue and front wall of air layer outer boundary and burner hearth form the negative relative area an of anoxic, penetrate
The combustion gas gone out anoxycausis in the region, i.e., dense burning, producing a large amount of reducing substances can inhibit NOx to generate；And
Combustion gas and smoke mixture gradually flow towards burner hearth tail portion under the power of burner hearth positive pressure, can make combustion gas in entire burner hearth
It burns, takes full advantage of the space of burner hearth, reduce the peak temperature of flame, balanced flame temperature, and then reduce NOx
Discharge.
3, flame holder center arrangement has a small amount of air gun, provides center ignition heat, stablizes flame, thus the combustion of the multitubular boiler
Gas combustion system has excellent combustion stability.
Claims (3)
1. a kind of fuel gas combustion system of suitable multitubular boiler, including boiler furnace and the antetheca center for being placed in the boiler furnace
The low NO of axial location, it is characterised in that: the low NO include stable flame pan, gas gun, burner throat and
Combustion air channel, the stable flame pan, gas gun, burner throat begin successively to be symmetrical arranged outward by burner centre axis；
The combustion air channel is placed in burner throat；
The stable flame pan is round plate or is spiral-flow type annulus, and center is axis installation through-hole, and the axis installation through-hole is built-in with
A small amount of air gun provides center ignition heat, stablizes flame；Central through hole periphery is multiple steady combustion air ducts；
The gas gun is placed in the outside of stable flame pan, and the spray orifice of the gas gun stretches out burner throat and spray orifice radially,
Gas gun quantity have it is multiple, be symmetrical arranged.
2. a kind of fuel gas combustion system of suitable multitubular boiler according to claim 1, it is characterised in that: the stable flame pan is
Round plate is disposed with a small amount of air gun in the axis installation through-hole, provides center ignition heat, stablizes flame；Central through hole periphery
Multiple steady combustion air ducts are equipped on round plate.
3. a kind of fuel gas combustion system of suitable multitubular boiler according to claim 1, it is characterised in that: the stable flame pan is
Spiral-flow type annulus, center are axis installation through-hole, and periphery is annulus, are equipped with rotation between the axis installation through-hole and the peripheral annulus
Blade is flowed, is disposed with a small amount of air gun in the central through hole, center ignition heat is provided, stablizes flame；It is more between swirl vane
A steady combustion air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822277893.0U CN209655301U (en) | 2018-12-30 | 2018-12-30 | It is suitble to the fuel gas combustion system of multitubular boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822277893.0U CN209655301U (en) | 2018-12-30 | 2018-12-30 | It is suitble to the fuel gas combustion system of multitubular boiler |
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| Publication Number | Publication Date |
|---|---|
| CN209655301U true CN209655301U (en) | 2019-11-19 |
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ID=68520018
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822277893.0U Active CN209655301U (en) | 2018-12-30 | 2018-12-30 | It is suitble to the fuel gas combustion system of multitubular boiler |
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| CN (1) | CN209655301U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611847A (en) * | 2018-12-30 | 2019-04-12 | 上海华之邦科技股份有限公司 | A kind of fuel gas combustion system of suitable multitubular boiler |
| CN113776051A (en) * | 2021-09-29 | 2021-12-10 | 瓦兰热能设备(无锡)有限公司 | Marsh gas combustor |
-
2018
- 2018-12-30 CN CN201822277893.0U patent/CN209655301U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611847A (en) * | 2018-12-30 | 2019-04-12 | 上海华之邦科技股份有限公司 | A kind of fuel gas combustion system of suitable multitubular boiler |
| CN113776051A (en) * | 2021-09-29 | 2021-12-10 | 瓦兰热能设备(无锡)有限公司 | Marsh gas combustor |
| CN113776051B (en) * | 2021-09-29 | 2024-10-25 | 瓦兰热能设备(无锡)有限公司 | Methane burner |
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Address after: 200433, room 202-10, building A, building 128, No. 11 Xiang Yin Road, Shanghai, Yangpu District Co-patentee after: Changzhou Jingjie Environmental Protection Technology Co., Ltd Patentee after: SHANGHAI WISEBOND TECHNOLOGY Co.,Ltd. Address before: 200433, room 202-10, building A, building 128, No. 11 Xiang Yin Road, Shanghai, Yangpu District Co-patentee before: WISEBOND ENVIRONMENTAL PROTECTION TECHNOLOGY (CHANGZHOU) Co.,Ltd. Patentee before: SHANGHAI WISEBOND TECHNOLOGY Co.,Ltd. |