CN206112984U - Flue gas preblends and dehydrating unit with air among gas recirculation - Google Patents
Flue gas preblends and dehydrating unit with air among gas recirculation Download PDFInfo
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- CN206112984U CN206112984U CN201620999770.6U CN201620999770U CN206112984U CN 206112984 U CN206112984 U CN 206112984U CN 201620999770 U CN201620999770 U CN 201620999770U CN 206112984 U CN206112984 U CN 206112984U
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- flue gas
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- deflector
- gas
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Abstract
The utility model provides a technical problem realizes the flue gas of flue gas preblends and dehydrating unit with air among gas recirculation, solve and a potential safety hazard belongs to the boiler and falls row technical field that combustion air homogeneous mixing and dehumidification dual function were eliminated when weather moved severe winter. Its characterized in that: deploy the import that has combustion air entrance and flue gas inlet section on the flue gas mixing chamber inner wall, it has mixed gas outlet to deploy down, the guiding device has still been put to flue gas mixing chamber inner chamber, will two parts around flue gas mixing chamber inner chamber divide into, the ante -chamber is the gas mixture intake channel, and the back cavity is gas mixture exit channel: first hydrophobic mouthful has been put in defeated tuber pipe of flue gas and flue gas inlet junction below, and the minimum processing of flue gas mixing chamber inner chamber has hydrophobic mouthful of second. During operation, combustion air and flue gas are in the flue gas mixing chamber, and alternately the efflux acutely collides the mixture, and the potential safety hazard when the gas recirculation system moves has been eliminated in flue gas intensive mixing and secondary dehumidification under cold weather.
Description
Technical field
This utility model is related to a kind of boiler reduces the device of NOx emission using flue gas recirculating technique, particularly a kind of
By part boiler smoke and combustion air premixing and dehydrating unit, category boiler drop drainage technique field.
Background technology
With becoming increasingly conspicuous for environmental problem, country is more and more stricter to the emission limit of boiler atmosphere pollution.Flue gas
Recirculating technique, will partial fume mix with fresh air after common feeding participate in combustion apparatus and boiler burning, because of it
Ignition temperature and oxygen concentration can be reduced, the generation of fuel type NOx and thermal NO x is effectively inhibited, boiler is effectively reduced
The concentration of emission of NOx, and be widely used, it is a kind of effective, low nitrogen burning mode of high performance-price ratio.By taking natural gas as an example, make
Use super low NO, based on stable combustion technology under the premise of, can reduce NOx using flue gas recirculating technique and reach as high as 70% or so,
And steam generator system can be kept to operate steadily.
Traditional flue gas recirculating technique be flue gas and combustion air upon mixing, send in burner and burnt, it is many
Number case is to be drawn flue gas by a pipeline to be connected to blower inlet, but the method has the not good situation of mixing, and pot
The flue gas of stove contains gaseous vapor, especially oil-burning gas-fired boiler, containing 20% or so vapor.In cold winter,
Particularly northern area, the vapor in flue gas is met substantial amounts of cold air and can be condensed to icing, obstruction air duct or impact
Aerator normally runs, in particular so that draught fan impeller freezes, affects its dynamic balancing and normal operation, affects the safety fortune of boiler
OK, or even blowing out, Boiler combustion phenomenon can be caused.Therefore under cold snap, need in time to dehumidify flue gas recirculation system, disappear
Except potential safety hazard.
The content of the invention
The purpose of this utility model is：There is provided flue gas in a kind of flue gas recirculation to close with air pre-mixing and dehydrating unit, disappear
Except potential safety hazard of the flue gas recirculating system when severe winter cold snap runs, realize that flue gas and combustion air uniformly mix and remove
Wet dual-use function.
The technical solution of the utility model is：Flue gas is closed and dehydrating unit with air pre-mixing in a kind of flue gas recirculation, bag
Include combustion air inlet section, flue gas mixing-chamber, flue gas wind conveying pipe, gas approach section and mixed gas outlet, it is characterised in that：Institute
State the import that flue gas mixing-chamber upper inside wall is equipped with the combustion air inlet section and the gas approach section, the flue gas mixing
Chamber interior walls bottom is equipped with the mixed gas outlet；The flue gas mixing-chamber inner chamber is also equipped with guiding device, the guiding device
Including horizontal deflector and the first vertical deflector, a side of the horizontal deflector and the import of gas approach section and mix
Flue gas mixing-chamber inwall between gas outlet is connected, the upper end of relative another side and the described first vertical deflector
While connecting, mutually it is connected in inverted l-shaped structure, the bottom of the first vertical deflector is less than the mixed gas outlet
Lower edge；The arranged on left and right sides side of the horizontal deflector, and left and right two vertical edge of the first vertical deflector respectively with
The flue gas mixing-chamber inwall is connected, and the flue gas mixing-chamber inner chamber is divided into into before and after two part, and ante-chamber is gaseous mixture
Intake channel, back cavity is mixed gas outlet passage：Described flue gas wind conveying pipe and gas approach junction lower section is equipped with first and dredges
The mouth of a river, described flue gas mixing-chamber inner chamber lowest point is equipped with the second drain port.
The side of horizontal deflector one of the guiding device and the cigarette between the import of gas approach section and mixed gas outlet
Gas mixing chamber interior walls are connected, and relative another side connects with the upper end edge of the described first vertical deflector and is connected,
The another dual side-edge of the horizontal deflector connects respectively solid with the upper end edge of the second vertical deflector or the 3rd vertical deflector
It is fixed；Two vertical edges of the first vertical deflector respectively with adjacent the described second vertical deflector or the 3rd vertical deflector
Vertical edge edge be connected one by one, the vertical edge of opposite side two of the second vertical deflector and the 3rd vertical deflector
Edge and flue gas mixing-chamber inwall are adjacent to be fixed, and in tubular construction is inverted, the flue gas mixing-chamber inner chamber is divided in cylinder, outside cylinder
Two parts, are combi inlet port passage outside cylinder, are mixed gas outlet passage in cylinder.
The guiding device is elbow-shaped guiding device, and upper port is connected with mixed gas outlet and communicates, and lower port is cigarette
Gas mixing chamber inner chamber bottom mixed gas entrance.
The gas approach section is connected from the top down with the flue gas mixing-chamber, the axis and cigarette of described gas approach section
Angle between the axis of gas mixing chamber first half combustion air inlet section is α, 0 °< α < 90°.
The air intake section is placed in the first half of the flue gas mixing-chamber, the axis of the air intake section and it is described
In β angles between the axis of flue gas mixing-chamber lower half, 90 °<β< 225°.
Described the first drain port and hydrophobic quantity at least one of the second drain port, can on demand arrange multiple, use
Aqueous water after steam coagulation in removal flue gas.
When flue gas works with air pre-mixing conjunction and dehydrating unit in a kind of flue gas recirculation, combustion air is entered by combustion air
Mouth enters flue gas mixing-chamber, and when flue gas wind conveying pipe, part vapor is condensed to the cold flue gas recycled, the water Jing first of liquid
Drain port is removed, and then flue gas enters gas approach section, and at an angle α oblique cuttings enter in flue gas mixing-chamber gas approach section,
Combustion air and flue gas cross jet, strong hit mixing is set mixed uniformly flue gas-air gaseous mixture to be defined, while cigarette
Gas meets a large amount of cold combustion airs, and vapor is condensed rapidly, and flue gas-air gaseous mixture revolves under the guide functions of guiding device
Go to flue gas mixing-chamber bottom, wall effect and rotate to the centrifugation of flue gas mixing-chamber lower stream of airflow, the water for making liquid steams
Gas and gaseous mixture produce separation, and the aqueous water being separated under gravity, is pooled to flue gas mixing-chamber bottom most
Lower, the drain ports of Jing second are removed, and the blended gas outlet of homogeneous mixture of dry-off moisture discharges, and is finally delivered to burning
Device.
Good effect of the present utility model is：Special structure design in this utility model device, makes combustion air and cigarette
Gas is condensed to the cold in mixing chamber top cross jet, strong hit mixing, and vapor, and flue gas-air gaseous mixture is in water conservancy diversion
Under the guide functions of device, rotate to flue gas mixing-chamber bottom, and then reach uniform mixing and the effect for dehumidifying.It is mixed uniformly
Flue gas-air gaseous mixture reduces oxygen content, reduces the generation of NOx；Unique the first drain port and second of this utility model
Drain port structure design, simple structure is stable, eliminates the vapor in gaseous mixture, realizes cigarette in flue gas recirculation
The dual-use function that gas is closed with air pre-mixing and dehumidified, the safety eliminated when flue gas recirculation system is run in cold weather is hidden
Suffer from.
Description of the drawings
Below in conjunction with the accompanying drawings the utility model is described in further detail with specific embodiment for explanation.
Fig. 1 is the structural representation of this utility model patent；
Fig. 2 is the Α of Fig. 1 to structural representation；
Fig. 3 is guiding device attachment structure schematic diagram（One of）；
Fig. 4 is guiding device attachment structure schematic diagram（Two）；
Fig. 5 is elbow-shaped guiding device attachment structure schematic diagram.
In figure：1-combustion air inlet section；2-flue gas mixing-chamber；21-flue gas mixing-chamber inwall；The defeated wind of 3-flue gas
Pipe；4-gas approach section；5-the first drain port；6-mixed gas outlet, 7-guiding device；71-the first guiding device；
711-horizontal deflector；712-the first vertical deflector；713-. the second vertical deflector；714-the three vertical deflector；
72-the second guiding device 73.-elbow-shaped guiding device；8-flue gas mixing-chamber bottom；9-the second drain port.
Specific embodiment
Fig. 1 is this utility model structural representation, Fig. 2 for Fig. 1 Α to structural representation, Fig. 3 is guiding device connection
Structural representation（One of）.From diagram, flue gas and air pre-mixing are closed and dehydrating unit in a kind of flue gas recirculation, including helping
Combustion air intake section 1, flue gas mixing-chamber 2, flue gas wind conveying pipe 3, gas approach section 4 and mixed gas outlet 6, it is characterised in that：
The upper inside wall of the flue gas mixing-chamber 2 is equipped with the import of the combustion air inlet section 1 and the gas approach section 4, the cigarette
The inner wall lower of gas mixing chamber 2 is equipped with the mixed gas outlet 6；The inner chamber of the flue gas mixing-chamber 2 is also equipped with guiding device 7, institute
Guiding device 71 is stated including the vertical deflector 712 of horizontal deflector 711 and first, a side of the horizontal deflector 711 with
Flue gas mixing-chamber inwall 21 between the import of gas approach section 4 and mixed gas outlet 6 is connected, relative another side with
The upper end edge of the first vertical deflector 712 connects, and is mutually connected in inverted l-shaped structure, the first vertical deflector
Lower edge of 712 bottom less than the mixed gas outlet 6；The arranged on left and right sides side of the horizontal deflector 711, and institute
Left and right two vertical edge for stating the first vertical deflector 712 is connected respectively with the flue gas mixing-chamber inwall 21, and by the cigarette
Gas mixing chamber inner chamber is divided into before and after two part, and ante-chamber is combi inlet port passage, and back cavity is mixed gas outlet passage：Described cigarette
Gas wind conveying pipe 3 and the junction of gas approach 4 lower section are equipped with the first drain port 5, and the described inner chamber lowest point of flue gas mixing-chamber 2 is equipped with
Second drain port 9.
Fig. 4 is guiding device attachment structure schematic diagram（Two）；Illustrate the guiding device horizontal deflector 711 one
Flue gas mixing-chamber inwall 21 between side and gas approach section 4 and mixed gas outlet 6 is connected, relative another side
Connect with the upper end edge of the described first vertical deflector 712 and be connected, the another dual side-edge of the horizontal deflector 711 respectively with
The upper end edge of the second vertical deflector 713 or the 3rd vertical deflector 714 connects fixation, the first vertical deflector 712
Two vertical edges respectively with the edge one of the vertical edge of adjacent the described second vertical deflector 713 or the 3rd vertical deflector 714
One is connected, the edge and cigarette of the vertical edge of opposite side two of the second vertical deflector 713 and the 3rd vertical deflector 714
Gas mixing chamber interior walls 21 are adjacent to fix, in tubular construction is inverted, the flue gas mixing-chamber inner chamber is divided in cylinder, cylinder it is outer two
Point, it is combi inlet port passage outside cylinder, it is mixed gas outlet passage in cylinder.Fig. 5 is elbow connection diagram.
Fig. 5 is elbow-shaped guiding device 73, and upper port is connected with mixed gas outlet 6 and communicates, and lower port is that flue gas mixes
Indoor chamber bottom mixed gas entrance.
At an angle α oblique cuttings enter in flue gas mixing-chamber 2 described gas approach section 4, the described He of flue gas wind conveying pipe 3
The junction of gas approach section 4, is equipped with 0～5 the first drain port 5, and at the minimum point of the flue gas mixing-chamber bottom 8 1～5 is equipped with
Individual second drain port 9.Drain port quantity can be arranged on demand, and at least one.
Between the axis of described gas approach section 4 and the axis of the first half combustion air inlet section 1 of flue gas mixing-chamber 2
Angle is α, 0 °< α < 90°.
Between the described axis of flue gas mixing-chamber first half combustion air inlet section 1 and the lower half axis of flue gas mixing-chamber 2
Angle be β, 90 °< β < 225°.
Guiding device 7 can be not limited to above-mentioned three kinds of version as shown in Fig. 3, Fig. 4 and Fig. 5, and its purpose is all by air
The inner chamber bottom of flue gas mixing-chamber 2 is directed to flue gas, realizes that combustion air flue gas is sufficiently mixed and is removed in flue gas after moisture, from
Mixed gas outlet 6 flows out blending bin and enters burner.
Combustion air inlet section 1 and gas approach section 4 be at an angle in oblique entrance flue gas mixing-chamber 2, combustion-supporting sky
Gas and flue gas in flue gas mixing-chamber 2, cross jet, strong hit mixing, then go in the guide functions backspin of guiding device 7
Flue gas mixing-chamber bottom 8, is further mixed gentle-vapour and is separated.The aqueous water of condensation then under gravity, Jing
One drain port 5 and the second drain port 9 are discharged.Secondary dehumidifying ensure that effect on moisture extraction.That finally removes dampness is uniformly sufficiently mixed gas
Discharge from mixed gas outlet 6 and be delivered to burner, realize combustion air and flue gas is sufficiently mixed and removes moisture in flue gas
Double effectses, eliminate potential safety hazard when flue gas recirculation system is run in cold weather.
Claims (6)
1. flue gas is closed and dehydrating unit with air pre-mixing in a kind of flue gas recirculation, including the mixing of combustion air inlet section, flue gas
Room, flue gas wind conveying pipe, gas approach section and mixed gas outlet, it is characterised in that：The flue gas mixing-chamber upper inside wall is equipped with
The import of the combustion air inlet section and the gas approach section, the flue gas mixing-chamber inner wall lower is equipped with the gaseous mixture
Body is exported；The flue gas mixing-chamber inner chamber is also equipped with guiding device, and the guiding device is vertical including horizontal deflector and first
Deflector, the flue gas mixing-chamber between a side of the horizontal deflector and the import of gas approach section and mixed gas outlet
Inwall is connected, and relative another side connects with the upper end edge of the described first vertical deflector, is mutually connected in inverted L
Shape structure, the bottom of the first vertical deflector is less than the lower edge of the mixed gas outlet；The horizontal deflector
Arranged on left and right sides side, and left and right two vertical edge of the first vertical deflector is connected respectively solid with the flue gas mixing-chamber inwall
It is fixed, and the flue gas mixing-chamber inner chamber is divided into into before and after two part, ante-chamber is combi inlet port passage, and back cavity is mixed gas outlet
Passage：Described flue gas wind conveying pipe and gas approach junction lower section is equipped with the first drain port, described flue gas mixing-chamber inner chamber
Lowest point is equipped with the second drain port.
2. according to claim 1 flue gas is closed and dehydrating unit with air pre-mixing in a kind of flue gas recirculation, it is characterised in that：
The side of horizontal deflector one of the guiding device and the flue gas mixing-chamber inwall between gas approach section and mixed gas outlet
It is connected, relative another side connects with the upper end edge of the described first vertical deflector and is connected, the horizontal water conservancy diversion
The another dual side-edge of plate connects respectively fixation with the upper end edge of the second vertical deflector or the 3rd vertical deflector, and described first erects
Two vertical edges of straight deflector respectively with the vertical edge edge of adjacent the described second vertical deflector or the 3rd vertical deflector
It is connected one by one, edge and the flue gas of the vertical edge of opposite side two of the second vertical deflector and the 3rd vertical deflector are mixed
Close that chamber interior walls are adjacent to fix, in tubular construction is inverted, the flue gas mixing-chamber inner chamber is divided in cylinder, outer two parts of cylinder, outside cylinder
For combi inlet port passage, it is mixed gas outlet passage that cylinder is interior.
3. according to claim 1 flue gas is closed and dehydrating unit with air pre-mixing in a kind of flue gas recirculation, it is characterised in that：
The guiding device is elbow-shaped guiding device, and upper port is connected with mixed gas outlet and communicates, and lower port is flue gas mixing-chamber
Inner chamber bottom mixed gas entrance.
4. according to claim 1 flue gas is closed and dehydrating unit with air pre-mixing in a kind of flue gas recirculation, and its feature exists
In：The gas approach section is connected from the top down with the flue gas mixing-chamber, and the gas approach section axis is mixed with the flue gas
It is in α angles to close between chamber axis, 0 °<α< 90°.
5. according to claim 1 flue gas is closed and dehydrating unit with air pre-mixing in a kind of flue gas recirculation, it is characterised in that：
The air intake section is placed in the first half of the flue gas mixing-chamber, the axis of the air intake section and the flue gas
In β angles between the axis of mixing chamber lower half, 90 °<β< 225°.
6. according to claim 1 flue gas is closed and dehydrating unit with air pre-mixing in a kind of flue gas recirculation, it is characterised in that：
Hydrophobic quantity at least one of first drain port and the second drain port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620999770.6U CN206112984U (en) | 2016-08-31 | 2016-08-31 | Flue gas preblends and dehydrating unit with air among gas recirculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620999770.6U CN206112984U (en) | 2016-08-31 | 2016-08-31 | Flue gas preblends and dehydrating unit with air among gas recirculation |
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| Publication Number | Publication Date |
|---|---|
| CN206112984U true CN206112984U (en) | 2017-04-19 |
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ID=58515816
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620999770.6U Active CN206112984U (en) | 2016-08-31 | 2016-08-31 | Flue gas preblends and dehydrating unit with air among gas recirculation |
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| CN (1) | CN206112984U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225003A (en) * | 2016-08-31 | 2016-12-14 | 上海华之邦科技股份有限公司 | In a kind of flue gas recirculation, flue gas closes and dehydrating unit with air pre-mixing |
| CN107883374A (en) * | 2017-11-21 | 2018-04-06 | 湖南安普诺环保科技有限公司 | A kind of natural gas boiler low nitrogen burning system and technique |
| CN110986031A (en) * | 2019-12-05 | 2020-04-10 | 西安交通大学 | System for avoiding water vapor condensation in gas boiler flue gas recirculation pipeline |
| CN114159989A (en) * | 2021-10-28 | 2022-03-11 | 青岛明华电子仪器有限公司 | Gas mixing device |
-
2016
- 2016-08-31 CN CN201620999770.6U patent/CN206112984U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106225003A (en) * | 2016-08-31 | 2016-12-14 | 上海华之邦科技股份有限公司 | In a kind of flue gas recirculation, flue gas closes and dehydrating unit with air pre-mixing |
| CN107883374A (en) * | 2017-11-21 | 2018-04-06 | 湖南安普诺环保科技有限公司 | A kind of natural gas boiler low nitrogen burning system and technique |
| CN110986031A (en) * | 2019-12-05 | 2020-04-10 | 西安交通大学 | System for avoiding water vapor condensation in gas boiler flue gas recirculation pipeline |
| CN114159989A (en) * | 2021-10-28 | 2022-03-11 | 青岛明华电子仪器有限公司 | Gas mixing device |
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