CN109654491A - A kind of interior axial water-cooled premixing combustion apparatus - Google Patents

A kind of interior axial water-cooled premixing combustion apparatus Download PDF

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Publication number
CN109654491A
CN109654491A CN201910040819.3A CN201910040819A CN109654491A CN 109654491 A CN109654491 A CN 109654491A CN 201910040819 A CN201910040819 A CN 201910040819A CN 109654491 A CN109654491 A CN 109654491A
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CN
China
Prior art keywords
combustion
combustion chamber
chamber
cooled
flame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910040819.3A
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Chinese (zh)
Inventor
何剑
孙浩迪
郭跃峰
戴金鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Li Ju Thermal Energy Equipment Co Ltd
Original Assignee
Zhejiang Li Ju Thermal Energy Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Li Ju Thermal Energy Equipment Co Ltd filed Critical Zhejiang Li Ju Thermal Energy Equipment Co Ltd
Priority to CN201910040819.3A priority Critical patent/CN109654491A/en
Publication of CN109654491A publication Critical patent/CN109654491A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/62Mixing devices; Mixing tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/72Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/78Cooling burner parts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/84Flame spreading or otherwise shaping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D2214/00Cooling

Abstract

The present invention relates to a kind of burners, especially a kind of interior axial water-cooled premixing combustion apparatus, including combustion chamber, cooling tube is equipped in combustion chamber, axis of the cooling tube around combustion chamber is arranged in circle, combustion chamber includes air chamber, combustion chamber, air chamber is formed between Inner Wall of Combustion Chamber and cooling tube, the region that cooling tube surrounds forms combustion chamber, mixed gas flows to combustion chamber by air chamber, mixed gas is burnt in combustion chamber forms annular flame, flame is radially inward, and annular flame is formed by mixed gas in the combustion chamber towards axle center burning, flame is radially inward, and it burns towards axle center, so that burning is more concentrated, fuel combustion is more complete, pass through flame radial combustion, can contract short flamed Propagation length, therefore it can reduce combustion chamber volume, further decrease the overall volume of boiler, improve boiler Security performance simplifies boiler structure.

Description

A kind of interior axial water-cooled premixing combustion apparatus
Technical field
The present invention relates to a kind of burner, especially a kind of interior axial water-cooled premixing combustion apparatus belongs to boiler combustion Device technical field.
Background technique
Gas heating boiler burns easy to adjust because its energy-saving and environmental protection, automatic degree are high, and heating rate is fast, and the thermal efficiency is high The advantages that increasingly have been favored by people and be widely applied in heating industry.Since its fuel used is inflammable and explosive combustion Gas, therefore, the burner of combustion gas play the role of the safe operation of boiler vital.
The air that conventional burners burning needs is conveyed by air blower, is divided into First air and Secondary Air.First air is by combustion Multiply shape is formed after the preceding bellows of burner, forms mixed gas with the multiply shape combustion gas sprayed from burner compression ring spray orifice.Combustion gas From spray orifice with the ejection of boiler radial direction, First air is with the ejection of boiler axial direction, two bursts of gas mixing.First air can be with Strong disturbance combustion gas forces the flow direction of combustion gas to be bent in the axial direction by radial, and mixed gas is by the stable flame pan of burner to burner hearth Surrounding is uniformly spread.Secondary Air is uniformly spread from diffuser to burner hearth surrounding.
After mixed gas enters boiler furnace, being sprayed along the axial direction of burner hearth, combustion flame burns along the axial direction of burner hearth, Combustion flame diameter is big, and combustion flame length is long.And conventional boiler requires furnace diameter to be greater than flame diameter, burner hearth length is greater than The length of flame.Therefore it is directed to the structure of conventional burners, needs to configure large scale burner hearth, structure is complicated, higher cost, and pot The security performance of furnace reduces.In addition, the mixed gas of conventional burners injection is longer due to combustion flame, it is easy to generate endless Full burning, generates more CO and NOx, be unfavorable for boiler oil makes full use of and be difficult to reach the low-nitrogen discharged mark of boiler It is quasi-.
Summary of the invention
It is larger the purpose of the present invention is to solve boiler furnace volume in the prior art and fuel is because cannot sufficiently fire It burns and leads to the problem of more NOx, a kind of interior axial water-cooled premixing combustion apparatus is provided.
To realize the above-mentioned technical purpose, the invention adopts the following technical scheme:
A kind of interior axial water-cooled premixing combustion apparatus, including combustion chamber are equipped with cooling tube in combustion chamber, and cooling tube is around burning The axis of room is arranged in circle, and combustion chamber includes air chamber, combustion chamber, and air chamber is formed between Inner Wall of Combustion Chamber and cooling tube, The region that cooling tube surrounds forms combustion chamber, and mixed gas flows to combustion chamber by air chamber, and mixed gas is burnt in combustion chamber Annular flame is formed, flame radially inward, and burns towards axle center.
Further, Propagation of the flue gas in combustion chamber along combustion chamber, smoke spread direction and flame combustion direction Vertically.
Further, combustion chamber one end is equipped with the first collecting chamber, and the other end is equipped with the second collecting chamber.
Further, cooling tube one end is located at the first collecting chamber, the other end is located at the second collecting chamber.
Further, the first collecting chamber is equipped with cooling water inlet, and the second collecting chamber is equipped with mouth at cooling water.
Further, hollow and/or the second collecting chamber the hollow formation exhanst gas outlet in middle part in the middle part of the first collecting chamber.
Further, sidewall of combustion chamber is equipped with one or more gas feeds, and multiple gas feeds are located at approximately the same plane, And it is uniformly distributed in sidewall of combustion chamber.
Further, mixed gas is premixed gas, and combustion gas mixes with air into required ratio after matching and is passed through gas feed.
Further, steady flame tube is additionally provided in combustion chamber, axis of the steady flame tube around combustion chamber is arranged in circle, steady flame tube one End is located at the first collecting chamber, the other end is located at the second collecting chamber.
Further, the trapezoidal body shape of the shape of cooling tube, the upper bottom surface and bottom surface of prismatoid form circular arc body;Steady flame The shape of pipe is cylindrical.
Further, the first gap is formed between cooling tube, and the second gap, steady flame tube center and phase are formed between steady flame tube Adjacent first gap alignment setting.
Compared with the prior art, the invention has the following advantages:
One, annular flame is formed by mixed gas in the combustion chamber, flame radially inward, and burns towards axle center, makes It must burn and more concentrate, fuel combustion is more complete;
Two, by flame radial combustion, can contract short flamed Propagation length, therefore can reduce combustion chamber Product, further decreases the overall volume of boiler, improves the security performance of boiler, simplify boiler structure;
Three, the required premixed gas matched is formed by mixing with air combustion gas, thermal NO x can be effectively reduced, together When combustion flame it is short, flameholding, heat transfer efficiency is high;
Four, by the way that cooling tube is arranged in the combustion chamber, the combustion flame for generating premixed gas is first and in cooling tube Cooling medium carries out heat exchange, reduces the temperature of combustion flame, inhibits the generation of NOx.
Detailed description of the invention
Fig. 1 is the facade internal structure chart of axial water-cooled premixing combustion apparatus in the embodiment of the present invention;
Fig. 2 is the internal plane structure chart of axial water-cooled premixing combustion apparatus in the embodiment of the present invention;
Fig. 3 is axial water-cooled premixing combustion apparatus structure chart in the embodiment of the present invention;
Fig. 4 is axial water-cooled premixing combustion apparatus side view in the embodiment of the present invention;
Fig. 5 is axial water-cooled premixing combustion apparatus front view in the embodiment of the present invention;
Fig. 6 is axial water-cooled premixing combustion apparatus top view in the embodiment of the present invention.
In figure: the combustion chamber 1-, 11- air chamber, 12- combustion chamber, 2- cooling tube, the first collecting chamber of 3-, the second collecting chamber of 4-, 5- cooling water inlet, 6- cooling water outlet, 7- exhanst gas outlet, 8- gas feed, the steady flame tube of 9-.
Specific embodiment
Below by specific embodiment the technical scheme of the present invention will be further described explanation.
Such as Fig. 1-6, the present embodiment provides a kind of interior axial water-cooled premixing combustion apparatus, including combustion chamber 1, in combustion chamber 1 Equipped with cooling tube 2, axis of the cooling tube 2 around combustion chamber 1 is arranged in circle.Combustion chamber 1 includes air chamber 11, combustion chamber 12.Combustion It burns and forms air chamber 11 between 1 inner wall of room and cooling tube 2, the region that cooling tube 2 surrounds forms combustion chamber 12, and mixed gas is by gas Body cavity 11 flows to combustion chamber 12.Mixed gas is burnt in combustion chamber 12 forms annular flame, flame radially inward, and towards axis Heart burning.
Cooling water is full of in cooling tube 2, mixed gas is burnt outside cooling tube 2, burned flame with it is cold in cooling tube 2 But water carries out heat exchange, reduces the temperature of combustion flame, and then inhibit the generation of NOx.Axis of the cooling tube 2 around combustion chamber 1 It being arranged in circle, cooling tube 2 divides entire combustion chamber 1 for air chamber 11 and combustion chamber 12, it is preferable that combustion chamber 1 is cylindrical, Air chamber 11 is annular shape.When combustion-gas flow is flowed out from the gap between cooling tube 2, it is capable of forming circle-shaped burning fire Flame.The burning direction of flame is as the flow direction of mixed airflow, radially inward, and towards the axle center of combustion chamber 1, protects Card burning is concentrated, and keeps fuel combustion more complete.Annular flame concentrated combustion radially inward reduces flame in axial propagation Length, therefore 1 volume of combustion chamber can be reduced.The burner of the present embodiment is applied on boiler, boiler can be reduced Overall volume improves boiler safety performance, simplifies conventional boiler structure.
The flue gas that mixed gas generates is flowed out from the upper end of combustion chamber 12 and/or lower end, or from the side of combustion chamber 1 Surface current goes out.Preferably, flue gas along combustion chamber 1 Propagation, it is vertical with flame combustion direction, and from 12 upper end of combustion chamber flow Out.High-temperature flue gas is used to the hot water in heating boiler after flowing out from combustion chamber 1.
1 one end of combustion chamber is equipped with the first collecting chamber 3, and the other end is equipped with the second collecting chamber 4, the first collecting chamber 3 and the second collection Filled with cooling water in water chamber 4.Preferably, the first collecting chamber 3 and the second collecting chamber 4 are annular.2 one end of cooling tube is located at the first collection Water chamber 3, the other end are located at the second collecting chamber 4, are full of cooling water in cooling tube 2.First collecting chamber 3 is equipped with cooling water inlet 5, the Two collecting chambers 4 are equipped with mouth 6 at cooling water.Under the drive for the water circulating pump being arranged outside combustion chamber 1, the water in cooling tube 2 is always In flow regime, the cooling water of flowing takes away the heat of the outer flame of cooling tube 2 in time, reduces the ignition temperature of flame.It is preferred that Ground, the 3 hollow formation exhanst gas outlet 7 in hollow and/or the second collecting chamber 4 the middle part in middle part of the first collecting chamber.The position of exhanst gas outlet 7 Also the side in combustion chamber 1 can be set, specific location selects according to the actual situation.
1 side wall of combustion chamber is equipped with one or more gas feeds 8, and mixed gas is entered in combustion chamber 1 by gas feed 8 Air chamber 11 in.Preferably, gas feed 8 is set as multiple.Multiple gas feeds 8 need to be located at approximately the same plane, and uniformly It is distributed in 1 side wall of combustion chamber, guarantees that mixed gas is evenly distributed in air chamber 11, while guaranteeing mixed gas in combustion chamber 12 The integrality of interior burning temporal consistency and combustion flame.
Mixed gas is premixed gas in the present embodiment, and combustion gas mixes with air into required ratio after matching and is passed through gas feed 8, Thermal NO x can be effectively reduced in premixed combustion gas, while the combustion flame of premixed gas is short, flameholding, and heat transfer efficiency is high. In addition to this, NOXGeneration and flame temperature has much relations when premixed combustion gas, pass through and cooling be set in combustion chamber 1 Pipe 2, premixed gas burn in 2 outer surface of cooling tube, and water is fully cooled in cooling tube 2, and combustion flame and cooling water carry out heat Exchange reduces the flame temperature of premixed combustion gas, and then inhibits the generation of NOx.Steady flame tube 9 is additionally provided in combustion chamber 12, surely Axis of the flame tube 9 around combustion chamber 1 is arranged in circle.Steady 9 one end of flame tube is located at the first collecting chamber 3, the other end is located at second and catchments Room 4, when flame enters steady 9 outer surface of flame tube, the cooling water in flame and steady flame tube 9 exchanges heat, and further decreases the burning of flame Temperature.
The gap of certain length is formed between cooling tube 2.Preferably, the trapezoidal body shape of the shape of cooling tube 2, prismatoid Upper bottom surface and bottom surface form circular arc body, and the arc length length of upper bottom surface circular arc body is less than the arc length length of bottom surface circular arc body, on Bottom surface circular arc body is closer from 1 center of combustion chamber, guarantees that the gap between cooling tube 2 is wide.Preferably, the shape of steady flame tube 9 is in It is cylindric.The gap formed between cooling tube 2 is the first gap, forms the second gap between steady flame tube 9, it is preferable that the first seam Gap is aligned setting with steady 9 center of flame tube with adjacent first gap.
The pressure that burning gases are formed when flowing out from the first gap is P1, and gas is after the outflow of the first gap by steady flame tube 9 Stop, is diverted in the second gap of steady 9 two sides of flame tube.After the outflow of the second gap, the pressure of formation is P2, and P2 is less than P1, The side of i.e. steady 9 air-flow of flame tube outflow forms negative pressure, and can strile-back unburned gas again.Therefore the steady flame tube 9 in combustor 1 Have the function of stablizing burning.Burning gases are by forming whole flame behind the first gap and the second gap.
The embodiments of the present invention have been described in detail above, for those of ordinary skill in the art, according to this The thought provided is provided, will change in specific embodiment, and these changes also should be regarded as protection model of the invention It encloses.

Claims (10)

1. a kind of interior axial water-cooled premixing combustion apparatus, including combustion chamber (1), it is characterised in that:
Cooling tube (2) are equipped in the combustion chamber (1), axis of the cooling tube (2) around combustion chamber (1) is arranged in circle;
Combustion chamber (1) includes air chamber (11), combustion chamber (12);Air chamber is formed between combustion chamber (1) inner wall and cooling tube 2 (11), the region that cooling tube (2) surrounds forms combustion chamber (12), and mixed gas flows to combustion chamber (12) by air chamber (11);
Mixed gas burning in combustion chamber (12) forms annular flame, and flame radially inward, and burns towards axle center.
2. according to interior axial water-cooled premixing combustion apparatus described in claim 1, it is characterised in that:
Along the Propagation of combustion chamber (1), smoke spread direction is vertical with flame combustion direction for flue gas in combustion chamber (12).
3. according to interior axial water-cooled premixing combustion apparatus as claimed in claim 2, it is characterised in that:
Described combustion chamber (1) one end is equipped with the first collecting chamber (3), and the other end is equipped with the second collecting chamber (4);Cooling tube (2) one end It is located at the second collecting chamber (4) positioned at the first collecting chamber (3), the other end.
4. interior axial water-cooled premixing combustion apparatus according to claim 3, it is characterised in that:
First collecting chamber (3) is equipped with cooling water inlet (5), and second collecting chamber (4) is equipped with cooling water outlet (6).
5. interior axial water-cooled premixing combustion apparatus according to claim 4, it is characterised in that:
The hollow formation exhanst gas outlet (7) in middle part of hollow and/or described second collecting chamber (4) in the middle part of first collecting chamber (3).
6. interior axial water-cooled premixing combustion apparatus according to claim 3, it is characterised in that: combustion chamber (1) side wall Equipped with one or more gas feeds (8);Multiple gas feeds (8) are located at approximately the same plane, and are uniformly distributed in combustion chamber (1) Side wall.
7. interior axial water-cooled premixing combustion apparatus according to claim 1, it is characterised in that: mixed gas is premix gas Body, combustion gas mix with air into required ratio after matching and are passed through gas feed (8).
8. interior axial water-cooled premixing combustion apparatus according to claim 1, it is characterised in that: in the combustion chamber (12) also Equipped with steady flame tube (9), axis of the steady flame tube (9) around combustion chamber (1) is arranged in circle;Steady flame tube (9) one end is located at first and catchments Room (3), the other end are located at the second collecting chamber (4).
9. interior axial water-cooled premixing combustion apparatus according to claim 8, it is characterised in that: outside the cooling tube (2) The trapezoidal body shape of shape, the upper bottom surface and bottom surface of prismatoid form circular arc body;The shape of the steady flame tube (9) is cylindrical.
10. interior axial water-cooled premixing combustion apparatus according to claim 9, it is characterised in that: cooling tube is formed between (2) First gap forms the second gap between steady flame tube (9), and steady flame tube (9) center is aligned setting with adjacent first gap.
CN201910040819.3A 2019-01-16 2019-01-16 A kind of interior axial water-cooled premixing combustion apparatus Pending CN109654491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910040819.3A CN109654491A (en) 2019-01-16 2019-01-16 A kind of interior axial water-cooled premixing combustion apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910040819.3A CN109654491A (en) 2019-01-16 2019-01-16 A kind of interior axial water-cooled premixing combustion apparatus

Publications (1)

Publication Number Publication Date
CN109654491A true CN109654491A (en) 2019-04-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110094800A (en) * 2019-05-31 2019-08-06 嘉兴怀莲贸易有限公司 A kind of earth source heat pump central-heating system
CN111121022A (en) * 2019-12-31 2020-05-08 西安交通大学 Low-nitrogen gas burner based on heat pipe heat exchange
WO2021031435A1 (en) * 2019-08-21 2021-02-25 浙江力聚热水机有限公司 Ultra-low nitrogen gas steam boiler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110094800A (en) * 2019-05-31 2019-08-06 嘉兴怀莲贸易有限公司 A kind of earth source heat pump central-heating system
WO2021031435A1 (en) * 2019-08-21 2021-02-25 浙江力聚热水机有限公司 Ultra-low nitrogen gas steam boiler
CN111121022A (en) * 2019-12-31 2020-05-08 西安交通大学 Low-nitrogen gas burner based on heat pipe heat exchange

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