CN207132331U - A kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler - Google Patents
A kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler Download PDFInfo
- Publication number
- CN207132331U CN207132331U CN201720782141.2U CN201720782141U CN207132331U CN 207132331 U CN207132331 U CN 207132331U CN 201720782141 U CN201720782141 U CN 201720782141U CN 207132331 U CN207132331 U CN 207132331U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- flue
- nozzle
- heat exchanger
- burner
- 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.)
- Active
Links
Landscapes
- Combustion Of Fluid Fuel (AREA)
Abstract
A kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler, it is characterized in that：Before burner hearth, burner nozzle is arranged with wall afterwards, outside is provided with cycle flue, gas recirculating fan and heat exchanger are set on cycle flue, heat exchanger is between gas recirculating fan and burner hearth, heat exchanger tube in heat exchanger with and the hot-water line that is connected of boiler be connected, cycle flue connects blast pipe, air-introduced machine is set on blast pipe, cycle flue is divided into multiple air inlet branch roads with before, wall connects afterwards, each air inlet branch road exit is provided with flue gas nozzle, flue gas nozzle is two rows, two smoke evacuation gas jets are in burner nozzle the same side, one ranks in the middle part of burner nozzle, one ranks in the lower section of burner nozzle.The utility model has reached the effect of flue gas recycled opposite-flushing type burning, by heat exchanger to flue gas, the flow velocity of flue gas is improved by blast pipe, flue gas is sufficiently mixed with air, realizes the abundant burning to flue gas recycled.
Description
Technical field：
It the utility model is related to a kind of burner of boiler flue gas recycled, and in particular to one kind is applied to double reheat
The opposed firing formula flue gas recirculation system of boiler.
Background technology：
Existing double reheat boiler cycle flue is mostly the single group flue for being arranged in main burner bottom, is provided only on stove
The side of thorax, and the flue gas nozzle in burner hearth is one layer, it is present, and unit operation feedback momentum is excessive, influences fluid field in furnace shape
State, destroy primary zone flow field, the defects of adjustable nargin is small, it is impossible to flue gas recycled is fully burnt, so both cause
Energy loss causes environmental pollution again.Furthermore the flue gas recycled temperature in existing cycle flue is relatively low, it is unfavorable in the inner
Flue gas is fully burnt after entering burner hearth.In addition, the flue gas flow rate in existing cycle flue is slower, can not be rapidly introduced into
Into burner hearth, the second-time burning efficiency of flue gas, and the relatively slow temperature that can also reduce flue gas of flow velocity of the flue gas in cycle flue are influenceed
Degree, is also detrimental to the abundant burning of flue gas, in addition, being usually present anoxia phenomenon in burner hearth, can not equally make to a certain extent
Flue gas is fully burnt.
Utility model content：
The utility model is to overcome above-mentioned deficiency, there is provided a kind of opposed firing formula cigarette suitable for double reheat boiler
Gas recirculating system, it is reached again by being symmetrical arranged cycle flue and flue gas nozzle on the forward and backward wall of boiler lower hearth
The effect of circulating flue gas opposite-flushing type burning, while be additionally arranged heat exchanger and flue gas is heated, it is additionally arranged blast pipe and circulation cigarette
Road is connected to improve the speed of flue gas, and flue gas is sufficiently mixed with air, realizes the abundant burning to flue gas recycled,
Energy-conserving and environment-protective.
Opposed firing formula flue gas recirculation system of the present utility model suitable for double reheat boiler, including boiler
Burner hearth, burner nozzle and cycle flue, to achieve the above object used technical scheme be：The burner hearth it is forward and backward
Burner nozzle is equipped with wall, and the burner nozzle on forward and backward wall is symmetrical, the bottom of close on the outside of the forward and backward wall of burner hearth
Portion is provided with symmetrical cycle flue, and the cycle flue is provided with gas recirculating fan and heat exchanger, heat exchanger
Between gas recirculating fan and burner hearth, heat exchanger tube in heat exchanger with and the hot-water line that is connected of boiler be connected, circulate cigarette
Road is connected with blast pipe, and blast pipe is provided with air-introduced machine, and cycle flue is divided into multiple air inlet branch roads and connected with forward and backward wall, each
The exit of air inlet branch road is provided with flue gas nozzle, and the flue gas nozzle is two rows, and two smoke evacuation gas jets are in burner
The same side of nozzle, and wherein one ranks in the middle part of burner nozzle, another ranks in the lower section of burner nozzle.
As further improvement of the utility model, the blast pipe is between heat exchanger and burner hearth.It is arranged such, makes
Flue gas is accelerated by blast pipe and entered in burner hearth after progress heat exchange is fully contacted with the heat exchanger tube in heat exchanger again.
As further improvement of the utility model, the flue gas nozzle of each row is sprayed by the edge of forward and backward wall to burner
It is obliquely installed gradually downward at mouth.It is arranged such, sprayed flue gas recycled can be made to be in different locus, make burner hearth
Inside flue gas recycled everywhere evenly, makes flue gas recycled fully be contacted with burner nozzle, fires flue gas recycled
Burn more abundant.
As further improvement of the utility model, the recirculating gas duct is provided with baffle plate, and the baffle plate is close to circulation
The outside of flue.The aperture of recirculating gas duct is adjusted by baffle plate.
The beneficial effects of the utility model are：The utility model passes through on forward and backward wall of the burner hearth of boiler close to bottom
Cycle flue is symmetrical arranged, so as to make the single group cycle flue of routine into two groups of cycle flues, every group of cycle flue is separated into
Two layers of air inlet branch road connects with forward and backward wall, and the exit of each air inlet branch road sets flue gas nozzle, so as to form two smoke dischargings
Nozzle, the flue gas recycled sprayed form the form of forward and backward wall opposite-flushing type, can make flue gas recycled distribution everywhere in burner hearth
Evenly, and further rank in the middle part of burner nozzle, another rank in the lower section of burner nozzle using wherein one
Set, flue gas recycled is fully burnt, can compared to the setting of existing single group cycle flue and individual layer flue gas nozzle
Strengthen heat convection, reduce NOx discharge capacity, suppress burner hearth coking, effectively control the temperature of burner hearth within the specific limits, can
Improve underload steam temperature and ensure scope, while can also reduce fume side deviation, improve double reheat boiler two-stage high temperature reheater
Condition of work.On this basis, the utility model is additionally arranged heat exchanger on cycle flue, and makes the heat exchanger tube in heat exchanger
It is connected with the hot-water line equipped with the hot water that user's heating is supplied after boiler heats, flue gas is entered in heat exchanger with changing
Hot water in heat pipe carries out heat exchange, so as to be heated to flue gas, improves the temperature into the flue gas in burner hearth, and then
It is easy to the abundant burning of flue gas, while hot water can be also cooled, alleviates the work load of follow-up hot water cooling system,
Avoid the hot water temperature for supplying user too high and user is not felt well.Meanwhile the utility model is also additionally arranged blast pipe with following
Annular smoke flue is connected, and on the one hand flue gas is quickly entered in burner hearth by blast pipe, on the other hand flue gas is filled with air
Divide mixing, also allow for the abundant burning of flue gas.
Brief description of the drawings：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the schematic diagram of preceding wall.
Embodiment：
Referring to Figures 1 and 2, should be suitable for the opposed firing formula flue gas recirculation system of double reheat boiler, including pot
Burner hearth 9, burner nozzle 1 and the cycle flue 2 of stove, are equipped with burner nozzle 1 on the forward and backward wall of the burner hearth 9, and preceding,
The burner nozzle 1 on wall is symmetrical afterwards, and symmetrical circulation is provided with close to bottom on the outside of the forward and backward wall of burner hearth 9
Flue 2, the cycle flue 2 are provided with gas recirculating fan 5 and heat exchanger 10, and heat exchanger 10 is in gas recirculating fan
Between 5 and burner hearth 9, heat exchanger 10 in heat exchanger 10 with and the hot-water line 11 that is connected of boiler be connected, cycle flue 2 be connected with into
Airduct 12, blast pipe 12 are provided with air-introduced machine 13, and blast pipe 12 is between heat exchanger 10 and burner hearth 9, can by blast pipe 12
Flue gas recycled is quickly entered in burner hearth 9, improve the efficiency of combustion of flue gas recycled, while flue gas recycled is entered with air
Row is sufficiently mixed, and flue gas recycled is fully burnt,
Cycle flue 2 is divided into multiple air inlet branch roads 3 and connected with forward and backward wall, and the exit of each air inlet branch road 3 is provided with
Flue gas nozzle 4, the flue gas nozzle 4 are two rows, and two smoke evacuation gas jets 4 are in the same side of burner nozzle 1, and wherein one
Rank in the middle part of burner nozzle 1, it is another rank in the lower section of burner nozzle 1, the flue gas nozzle 4 of each row is by forward and backward
The edge of wall is obliquely installed gradually downward at burner nozzle 1.The recirculating gas duct 2 is provided with baffle plate 14, the baffle plate
14 close to the outside of cycle flue 2.
The course of work：
Flue gas recycled first flows into heat exchanger 10 and carries out heat exchange with the hot water in heat exchanger tube and be heated, by air inducing
Flue gas recycled after heating is quickly blown into burner hearth 9 by machine 13 via blast pipe 12, improves the flow velocity of flue gas recycled,
And then the efficiency of combustion of flue gas recycled is improved, while air is sufficiently mixed with flue gas recycled, by air pair
Flue gas recycled progress is combustion-supporting, flue gas recycled is fully burnt, by cycle flue 2 through each air inlet branch road 3 by cigarette
Gas jets 3 are sprayed into boiler lower hearth 9, are burnt in the presence of burner nozzle 1, the institute of flue gas nozzle 4 on forward and backward wall
The flue gas of ejection forms the effect that liquidates, and smoke combustion can be made more abundant.
Claims (4)
1. a kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler, including the burner hearth (9) of boiler, combustion
Burner nozzle (1) and cycle flue (2), it is characterised in that：Burner nozzle is equipped with the forward and backward wall of the burner hearth (9)
(1) burner nozzle (1), and on forward and backward wall symmetrically, phase is provided with the outside of the forward and backward wall of burner hearth (9) close to bottom
Mutually symmetrical cycle flue (2), the cycle flue (2) are provided with gas recirculating fan (5) and heat exchanger (10), heat exchanger
(10) be between gas recirculating fan (5) and burner hearth (9), heat exchanger (10) in heat exchanger (10) with and boiler be connected
Hot-water line (11) is connected, and cycle flue (2) is connected with blast pipe (12), and blast pipe (12) is provided with air-introduced machine (13), circulates cigarette
Road (2) is divided into multiple air inlet branch roads (3) and connected with forward and backward wall, and the exit of each air inlet branch road (3) is provided with flue gas nozzle
(4), the flue gas nozzle (4) is two rows, and two smoke evacuation gas jets (4) are in the same side of burner nozzle (1), and wherein one
Rank in the middle part of burner nozzle (1), another rank in the lower section of burner nozzle (1).
2. a kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler as claimed in claim 1, its
It is characterised by：The blast pipe (12) is between heat exchanger (10) and burner hearth (9).
3. a kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler as claimed in claim 1, its
It is characterised by：The flue gas nozzle (4) of each row is obliquely installed gradually downward by the edge of forward and backward wall to burner nozzle (1).
4. a kind of opposed firing formula flue gas suitable for double reheat boiler as described in claim 1-3 any one is again
The circulatory system, it is characterised in that：The cycle flue (2) is provided with baffle plate (14), and the baffle plate (14) is close to cycle flue (2)
Outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720782141.2U CN207132331U (en) | 2017-06-30 | 2017-06-30 | A kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720782141.2U CN207132331U (en) | 2017-06-30 | 2017-06-30 | A kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207132331U true CN207132331U (en) | 2018-03-23 |
Family
ID=61632468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720782141.2U Active CN207132331U (en) | 2017-06-30 | 2017-06-30 | A kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207132331U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800157A (en) * | 2018-04-26 | 2018-11-13 | 光大环保技术研究院（南京）有限公司 | A kind of air distribution device and waste incinerator of flue gas |
| CN109210522A (en) * | 2018-10-04 | 2019-01-15 | 孙学贤 | Flash boiler and its operation logic |
| CN109210522B (en) * | 2018-10-04 | 2024-05-31 | 孙学贤 | Operation method of flash evaporation boiler |
-
2017
- 2017-06-30 CN CN201720782141.2U patent/CN207132331U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108800157A (en) * | 2018-04-26 | 2018-11-13 | 光大环保技术研究院（南京）有限公司 | A kind of air distribution device and waste incinerator of flue gas |
| CN109210522A (en) * | 2018-10-04 | 2019-01-15 | 孙学贤 | Flash boiler and its operation logic |
| CN109210522B (en) * | 2018-10-04 | 2024-05-31 | 孙学贤 | Operation method of flash evaporation boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110260299B (en) | Supercritical carbon dioxide coal-fired boiler and multi-stage flue gas recirculation method thereof | |
| CN106247304B (en) | A kind of double reheat boiler shape of three flue of tail portion arrangement | |
| CN203517771U (en) | Middle-temperature separating circulating fluidized bed boiler applicable to combusting high-sodium coal | |
| WO2015014233A1 (en) | Circulating fluidized bed boiler having secondary reheat | |
| CN207132331U (en) | A kind of opposed firing formula flue gas recirculation system suitable for double reheat boiler | |
| CN107677120A (en) | Energy-saving environment-friendly ceramic kiln | |
| CN105420458A (en) | Quenching furnace flue gas reusing device and reusing method based on quenching furnace flue gas reusing device | |
| CN106959014B (en) | Industrial furnace heat accumulating type forces furnace atmosphere circulation device | |
| CN206410126U (en) | Middle temperature separating circulating fluidized bed boiler for the high sodium coal that burns | |
| CN205991505U (en) | A kind of double reheat boiler opposed firing formula flue gas follows system again | |
| CN204739901U (en) | Recuperative heater with circulation canal | |
| CN108149002A (en) | A kind of continuous annealing preheating and residual neat recovering system and its flexible control method | |
| CN204213904U (en) | A kind of boiler smoke synthesis energy saving EGR | |
| CN109912188A (en) | A kind of combustion-type glass tempering heating device and operating method | |
| CN206280939U (en) | Bidirectional rotational flow thermal medium boiler | |
| CN108728629A (en) | A kind of energy-saving straight fire heating apparatus for continuous heat treatment | |
| CN106182282B (en) | A kind of timber heat modification processing method | |
| CN205192225U (en) | Gas roll table kiln | |
| CN210826252U (en) | Heat energy utilization system of quenching furnace | |
| CN208269398U (en) | A kind of complete hot swirl penetrates formula water heater | |
| CN107014213B (en) | Heat accumulating type used for industrial furnace impacts heat transfer unit (HTU) | |
| CN106642679A (en) | Jet metal hot-blast stove for tea heating dehumidification | |
| CN206846691U (en) | A kind of flue gas recirculation spout is located at burner two layers of double reheat boiler arranged up and down | |
| CN208983615U (en) | A kind of ultralow nitrogen vacuum hot water boiler | |
| CN207763502U (en) | A kind of trolley heating furnace of furnace gas high-speed rotational |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |