CN203771391U - Gas recirculation system for industrial gas boiler - Google Patents
Gas recirculation system for industrial gas boiler Download PDFInfo
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- CN203771391U CN203771391U CN201420072513.9U CN201420072513U CN203771391U CN 203771391 U CN203771391 U CN 203771391U CN 201420072513 U CN201420072513 U CN 201420072513U CN 203771391 U CN203771391 U CN 203771391U
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Abstract
The utility model discloses a gas recirculation system for an industrial gas boiler. The system comprises a burner, a hearth, a smoke separation component, a chimney and a circulating smoke passage, wherein a premix passage is formed in the middle of the burner, and is provided with a first passage inlet, a second passage inlet, a third passage inlet and a passage outlet; the hearth is provided with a hearth inlet communicated with the passage outlet and a hearth outlet used for exhausting burnt smoke; the smoke separation component comprises an exhaust passage and a recycling passage; the exhaust passage is provided with an exhaust inlet and an exhaust outlet; a recycling inlet and a recycling outlet are formed in the recycling passage; the exhaust inlet and the recycling inlet are respectively communicated with the hearth outlet, the exhaust passage and the recycling passage are separated by an isolation baffle, and an adjustment baffle used for controlling the smoke circulation proportion in the recycling passage is arranged between the recycling inlet and the recycling outlet; a chimney inlet and a chimney outlet are formed in the chimney; a smoke inlet and a smoke outlet are formed in the circulating smoke passage. According to the gas recirculation system, smoke circularly enters the burner to participate in burning, and the aim of energy conservation and environmental friendliness can be achieved.
Description
Technical field
The utility model relates to gas industry boiler energy-saving green technology, relates in particular to a kind of gas industry boiler smoke recirculating system.
Background technology
Combustion gas is more and more more is applied to Industrial Boiler, and the ratio of gas industry boiler reaches 5% left and right at present, and is the trend of rapid growth.Gas industry boiler operatiopn exists following problem at present: 1, air distribution bad cause burning insufficient; 2, fire box temperature lower cause burning insufficient; 3, fume afterheat utilization rate is lower; 4, discharged nitrous oxides is difficult to reach discharge standard.
Utility model content
The technical problems to be solved in the utility model is, a kind of improved gas industry boiler smoke recirculating system is provided.
The utility model solves the technical scheme that its technical problem adopts: a kind of gas industry boiler smoke recirculating system is provided, comprises:
Burner, offers premixed channel in the middle of burner, and premixed channel has first passage entrance, second channel entrance, third channel entrance and channel outlet;
Burner hearth, the furnace outlet of gained flue gas after thering is the burner hearth entrance being connected with channel outlet and discharging burning;
Flue gas separation assembly, comprise passing away and recovery approach, passing away has the entrance of discharge and discharges outlet, recovery approach has the entrance of recovery and reclaims outlet, discharge entrance and reclaim entrance and be connected with furnace outlet respectively, between passing away and recovery approach, by isolation baffle plate, separate, reclaim entrance and reclaim the controllable register that is also provided with flue gas recirculation ratio in control recovery approach between outlet;
Chimney, has the chimney entrance being connected with discharge outlet and the chimney breast being connected with external environment condition;
Circulating flue gas passage, has the smoke inlet being connected with recovery outlet and the exhanst gas outlet being connected with second channel entrance.
Gas industry boiler smoke recirculating system of the present utility model, is provided with between smoke inlet and exhanst gas outlet for the partial fume at smoke inlet place being imported to the high-temperature blower of exhanst gas outlet.
Gas industry boiler smoke recirculating system of the present utility model, also comprises secondary air channel, and secondary air channel has the Secondary Air entrance being connected with overfire air fan and the Secondary Air being connected with burner hearth outlet.
Gas industry boiler smoke recirculating system of the present utility model, the quantity of secondary air channel is at least one.
Gas industry boiler smoke recirculating system of the present utility model, secondary air channel is two, the length direction along burner hearth is oppositely arranged on burner hearth both sides respectively.
Gas industry boiler smoke recirculating system of the present utility model, Secondary Air outlet is positioned at the centre position of furnace height direction.
Gas industry boiler smoke recirculating system of the present utility model, it is 1 that Secondary Air outlet exports apart from the ratio of distances constant of burner hearth entrance apart from the distance of furnace outlet with Secondary Air: 2-1: 4.
Gas industry boiler smoke recirculating system of the present utility model, it is 1: 3 that Secondary Air outlet exports apart from the ratio of distances constant of burner hearth entrance apart from the distance of furnace outlet with Secondary Air.
Gas industry boiler smoke recirculating system of the present utility model, burner comprises:
A wind passage, a wind outlet that there is a wind entrance and be connected with first passage entrance;
Primary air fan, is connected with a wind entrance; And
Blast tube, the gas outlet that there is fuel gas inlet and be connected with third channel entrance, gas outlet is once between wind outlet and channel outlet.
Gas industry boiler smoke recirculating system of the present utility model, exhanst gas outlet is once between wind outlet and gas outlet.
Enforcement the beneficial effects of the utility model are: the flue gas recirculation in gas industry boiler smoke recirculating system of the present utility model enters in burner and participates in burning, improve fire box temperature and form hypoxemia atmosphere in the main combustion zone of burner hearth, at freeze profile, become burning comparatively fully, realized the object of energy-conserving and environment-protective.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the structural representation of gas industry boiler smoke recirculating system in the utility model embodiment.
The specific embodiment
For technical characterictic of the present utility model, object and effect being had more clearly, understand, now contrast accompanying drawing and describe the specific embodiment of the present utility model in detail.
As shown in Figure 1, the gas industry boiler smoke recirculating system in embodiment of the utility model comprises burner 10, burner hearth 20, flue gas separation assembly 30, chimney 40, circulating flue gas passage 50 and secondary air channel 60.
Wherein, in the middle of burner 10, offer premixed channel 11, premixed channel 11 has first passage entrance 111, second channel entrance 112, third channel entrance 113 and channel outlet 114.Burner 10 comprises wind passage 12, primary air fan 13 and blast tube 14 one time.The wind outlet that wind passage 12 has a wind entrance and is connected with first passage entrance 111.Primary air fan 13 is connected with a wind entrance, for being blown into wind one time to a wind entrance.The gas outlet that blast tube 14 has fuel gas inlet and is connected with third channel entrance 113, gas outlet is once between wind outlet and channel outlet 114.
Burner hearth 20 has burner hearth entrance and furnace outlet.Burner hearth 20 is connected with channel outlet 114 by burner hearth entrance, thereby realizes being connected of burner hearth 20 and burner 10.The flue gas of combustion gas and air gained after the interior burning of burner hearth 20 is discharged by furnace outlet.
Flue gas separation assembly 30 connects furnace outlet.Flue gas separation assembly 30 comprises passing away 31, recovery approach 32 and baffle plate 33.Wherein, passing away 31 has the entrance of discharge and discharges outlet, and recovery approach 32 has the entrance of recovery and reclaims outlet.Discharge entrance and reclaim entrance and be connected with furnace outlet respectively.Isolation baffle plate 34 is arranged between passing away 31 and recovery approach 32, for separating passing away 31 and recovery approach 32.Controllable register 33 is arranged on and reclaims entrance and reclaim between outlet, for controlling the interior flue gas recirculation ratio of recovery approach 32.
Chimney 40 has chimney entrance and chimney breast.Chimney entrance is connected with discharge outlet, and chimney breast is connected with external environment condition, for discharge section flue gas.
Circulating flue gas passage 50 has smoke inlet and exhanst gas outlet.Smoke inlet is connected with recovery outlet, and exhanst gas outlet is connected with second channel entrance 112.Between smoke inlet and exhanst gas outlet, be provided with for the partial fume at smoke inlet place being imported to the high-temperature blower 51 of exhanst gas outlet.Preferably, exhanst gas outlet is once between wind outlet and gas outlet.
Secondary air channel 60 has Secondary Air entrance and Secondary Air outlet.Wherein, Secondary Air entrance is connected with overfire air fan, and Secondary Air outlet is connected with burner hearth 20.The quantity of secondary air channel 60 is at least one, and preferably, secondary air channel 60 comprises two, and the length direction along burner hearth 20 is oppositely arranged on burner hearth 20 both sides respectively.Secondary Air outlet is positioned at the centre position of burner hearth 20 short transverses.Understandably, apart from the distance of furnace outlet, to export apart from the ratio of distances constant of burner hearth entrance with Secondary Air be 1 for Secondary Air outlet: 2-1: 4.Preferably, apart from the distance of furnace outlet, to export apart from the ratio of distances constant of burner hearth entrance with Secondary Air be 1: 3 for Secondary Air outlet.
Below the use of the gas industry boiler smoke recirculating system in the utility model embodiment is described: after burner hearth 20 normal ignition burnings, open controllable register 33, make part of smoke by circulating flue gas passage 50, import burner 10 by high-temperature blower 51, remaining flue gas enters environment by chimney 40, and the aperture that baffle plate 33 is opened is determined according to concrete operating load.In burner 10, along fluid flow direction, pass into successively wind, the flue gas of coming from high-temperature blower 51 and fuel gas one time from front to back, in burner 10, after premix, spray into burner hearth 20 and in the interior burning of burner hearth 20.On burner hearth 20, Secondary Air is set, Secondary Air passes in burner hearth 20 from both sides, carries out second-time burning.The ratio of wind and Secondary Air is about 4: 1, also can determine as the case may be.The flue gas that burning produces is passing through the control of controllable register 33, and a part enters burner 10, and a part enters environment by chimney 40, completes a circulation.
The above is only preferred embodiment of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, in several improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. a gas industry boiler smoke recirculating system, is characterized in that, comprising:
Burner (10), offers premixed channel (11) in the middle of described burner (10), and described premixed channel (11) has first passage entrance (111), second channel entrance (112), third channel entrance (113) and channel outlet (114);
Burner hearth (20), the furnace outlet of gained flue gas after thering is the burner hearth entrance being connected with described channel outlet (114) and discharging burning;
Flue gas separation assembly (30), comprise passing away (31) and recovery approach (32), described passing away (31) has the entrance of discharge and discharges outlet, described recovery approach (32) has the entrance of recovery and reclaims outlet, described discharge entrance and described recovery entrance are connected with described furnace outlet respectively, between described passing away (31) and described recovery approach (32), by isolation baffle plate (34), separate, between described recovery entrance and described recovery outlet, be also provided with the controllable register (33) of controlling the interior flue gas recirculation ratio of described recovery approach (32),
Chimney (40), has the chimney entrance being connected with described discharge outlet and the chimney breast being connected with external environment condition;
Circulating flue gas passage (50), has the smoke inlet being connected with described recovery outlet and the exhanst gas outlet being connected with described second channel entrance (112).
2. gas industry boiler smoke recirculating system according to claim 1, it is characterized in that, between described smoke inlet and described exhanst gas outlet, be provided with for the partial fume at described smoke inlet place being imported to the high-temperature blower (51) of described exhanst gas outlet.
3. gas industry boiler smoke recirculating system according to claim 1, it is characterized in that, also comprise secondary air channel (60), described secondary air channel (60) has the Secondary Air entrance being connected with overfire air fan and the Secondary Air being connected with described burner hearth (20) outlet.
4. gas industry boiler smoke recirculating system according to claim 3, is characterized in that, the quantity of described secondary air channel (60) is at least one.
5. gas industry boiler smoke recirculating system according to claim 3, is characterized in that, described secondary air channel (60) is two, and the length direction along described burner hearth (20) is oppositely arranged on described burner hearth (20) both sides respectively.
6. gas industry boiler smoke recirculating system according to claim 3, is characterized in that, described Secondary Air outlet is positioned at the centre position of described burner hearth (20) short transverse.
7. gas industry boiler smoke recirculating system according to claim 3, is characterized in that, described Secondary Air outlet is 1:2-1:4 apart from the distance of described furnace outlet and the ratio of distances constant of the described burner hearth entrance of described Secondary Air outlet distance.
8. gas industry boiler smoke recirculating system according to claim 3, is characterized in that, described Secondary Air outlet is 1:3 apart from the distance of described furnace outlet and the ratio of distances constant of the described burner hearth entrance of described Secondary Air outlet distance.
9. according to the gas industry boiler smoke recirculating system described in claim 1 to 8 any one, it is characterized in that, described burner (10) comprising:
A wind passage (12), a wind outlet that there is a wind entrance and be connected with described first passage entrance (111);
Primary air fan (13), is connected with a described wind entrance; And
Blast tube (14), the gas outlet that there is fuel gas inlet and be connected with described third channel entrance (113), described gas outlet is positioned between described wind outlet and described channel outlet (114).
10. gas industry boiler smoke recirculating system according to claim 9, is characterized in that, described exhanst gas outlet is between described wind outlet and described gas outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420072513.9U CN203771391U (en) | 2014-02-19 | 2014-02-19 | Gas recirculation system for industrial gas boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420072513.9U CN203771391U (en) | 2014-02-19 | 2014-02-19 | Gas recirculation system for industrial gas boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203771391U true CN203771391U (en) | 2014-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420072513.9U Expired - Fee Related CN203771391U (en) | 2014-02-19 | 2014-02-19 | Gas recirculation system for industrial gas boiler |
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| Country | Link |
|---|---|
| CN (1) | CN203771391U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420892A (en) * | 2016-05-23 | 2017-12-01 | 上海钜荷热力技术有限公司 | A kind of outer circulation smoke backflow formula all-premixing burner |
-
2014
- 2014-02-19 CN CN201420072513.9U patent/CN203771391U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107420892A (en) * | 2016-05-23 | 2017-12-01 | 上海钜荷热力技术有限公司 | A kind of outer circulation smoke backflow formula all-premixing burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20170219 |