CN206398738U - A kind of double loop smoke backflow system - Google Patents
A kind of double loop smoke backflow system Download PDFInfo
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- CN206398738U CN206398738U CN201621144147.9U CN201621144147U CN206398738U CN 206398738 U CN206398738 U CN 206398738U CN 201621144147 U CN201621144147 U CN 201621144147U CN 206398738 U CN206398738 U CN 206398738U
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- flue gas
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- gas circuit
- smoke backflow
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Abstract
A kind of double loop smoke backflow system, including：The flue gas circuit of structure identical first and the second flue gas circuit, including：Smoke backflow section, fresh air section and mixed wind section, first end, the first end of smoke backflow section and the section first end docking of mixed wind of smoke backflow section, second end of smoke backflow section is connected with the smoke-exhaust pipeline between electric dust removing system and chimney, and the second end of fresh air section is used to introduce fresh air；The air-introduced machine at the second end of smoke backflow section is arranged on, the exhaust gas volumn that air-introduced machine is introduced is default exhaust gas volumn；It is arranged on the pressure fan at the second end of fresh air section；Second end of the mixed wind section of the first flue gas circuit is connected with the primary side air channel of steam generator system, and the second end of the second flue gas circuit is connected with the secondary side air channel of steam generator system.By by smoke backflow a to air channel and secondary air duct so that flue gas is again introduced into boiler, and it is burnt again, so as to improve the utilization rate of fire coal, the content of the harmful substances from flue gases of boiler combustion system discharge is reduced.
Description
Technical field
The utility model is related to steam generator system technical field, and in particular to a kind of double loop smoke backflow system.
Background technology
Environmental requirement in face of country to thermal power plant, most thermal power plants domestic at present have completed desulfurization
The transformation of denitration, is effectively reduced air environmental pollution.But increasingly strict, the hair that energy-conserving and environment-protective are required with country
The enterprises such as electricity, steel, chemical industry propose higher rebuilding and improving requirement to it as coal-fired rich and influential family, country.
Steam generator system is the indispensable coal combustion equipment of the enterprises such as generating, steel, chemical industry, its in combustion, due to
Technical problem, coal can not be fully burned, and cause also have substantial amounts of solid particle, carbon monoxide etc. harmful in the flue gas of discharge
Gas so that haze phenomenon of surrounding area etc. is further serious, seriously endangers the healthy of periphery personnel, therefore how to improve
Harmful substance contents in the flue gas discharged in the utilization rate of the dyestuffs such as coal, reduction steam generator system, as people in the art
One of member's technical problem urgently to be resolved hurrily.
Utility model content
In view of this, the utility model embodiment provides a kind of double loop smoke backflow system, to realize reduction because of fire coal
The content of the harmful substances from flue gases for the boiler combustion system discharge that burn incompletely is caused, improves utilization rate of coal.
To achieve the above object, the utility model embodiment provides following technical scheme：
A kind of double loop smoke backflow system, including：
The flue gas circuit of structure identical first and the second flue gas circuit；
First flue gas circuit and the second flue gas circuit include：
Smoke backflow section, fresh air section and mixed wind section, wherein, the first end of smoke backflow section, the of smoke backflow section
One end and the section first end docking of mixed wind, the smoke-exhaust pipeline between the second end of the smoke backflow section and electric dust removing system and chimney
It is connected, the second end of the fresh air section is used to introduce fresh air；
The air-introduced machine at the second end of the smoke backflow section is arranged on, the exhaust gas volumn that the air-introduced machine is introduced is default flue gas
Amount；
It is arranged on the pressure fan at the second end of the fresh air section；
Second end of the mixed wind section of first flue gas circuit is connected with the primary side air channel of steam generator system, second cigarette
Second end of air circuit is connected with the secondary side air channel of steam generator system.
It is preferred that, in above-mentioned double loop smoke backflow system, the air-introduced machine is booster fan；
The exhaust gas volumn produced during the air quantity selection steam generator system 200MW operating modes of the booster fan in first flue gas circuit
6%, air quantity allowance takes 20%, and pressure head allowance takes 30%；
The exhaust gas volumn produced during the air quantity selection steam generator system 200MW operating modes of the booster fan in second flue gas circuit
9%, air quantity allowance takes 20%, and pressure head allowance takes 30%.
It is preferred that, in above-mentioned double loop smoke backflow system, the booster fan is centrifugal fan, the centrifugal blower
Air intake vent is provided with muffler, and the centrifugal blower is coated with acoustic material.
It is preferred that, in above-mentioned double loop smoke backflow system, in addition to：
The rock wool heat-preservation layer being coated on the flue of first flue gas circuit and the second flue gas circuit and sampling plate protection
Layer.
It is preferred that, in above-mentioned double loop smoke backflow system, first flue gas circuit and the second flue gas circuit also include：
It is arranged on the first flowmeter in smoke backflow section.
It is preferred that, in above-mentioned double loop smoke backflow system, in addition to：
It is connected with the air-introduced machine and pressure fan, the blower fan of the power output for controlling the air-introduced machine and pressure fan
Controller.
It is preferred that, in above-mentioned double loop smoke backflow system, first flue gas circuit and the second flue gas circuit also include：
Oxygen content tester for testing gas oxygen content in mixed wind section.
It is preferred that, in above-mentioned double loop smoke backflow system, first flue gas circuit and the second flue gas circuit also include：
It is arranged on the second flowmeter of the fresh air section；
The precaution device being connected with the first flowmeter and second flowmeter, for exporting and the first flowmeter and the
The pre-warning signal that the ratio of the metering numerical value of two flowmeters matches.
It is preferred that, in above-mentioned double loop smoke backflow system, in addition to：
With the first flowmeter in first flue gas circuit and the second flue gas circuit, second flowmeter, air-introduced machine and sending
The connected PC of blower fan；
The PC is used to obtain the defeated of the first flowmeter and second flowmeter measuring parameter, air-introduced machine and pressure fan
Go out power, be additionally operable to export for controlling air-introduced machine and pressure fan to the air-introduced machine and pressure fan according to user operation instruction
The control signal of working condition.
Based on above-mentioned technical proposal, the double loop smoke backflow system that the utility model embodiment is provided, by by flue gas
With new air return a to air channel and secondary air duct so that NOX, CO, coal particle in flue gas etc. are again introduced into boiler
In, it is burnt again so that improve fire coal utilization rate, reduce boiler combustion system discharge flue gas in NOX,
The content of the materials such as CO, coal particle.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing of offer.
Fig. 1 is a kind of structural representation of double loop smoke backflow system disclosed in the embodiment of the present application；
Fig. 2 is a kind of structural representation of double loop smoke backflow system disclosed in another embodiment of the application.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
It is directed in the prior art, boiler system utilization rate of coal is low, burns insufficient, and being discharged into air substantial amounts of has
Evil material, causes the problem of severe air pollutes, this application discloses a kind of double loop smoke backflow system, for boiler system
The flue gas that system is produced is reused.
Referring to Fig. 1, Fig. 1 is a kind of structural representation of double loop smoke backflow system disclosed in the embodiment of the present application, should
System is applied in steam generator system, and return-flow system can include：
Structure identical the first flue gas circuit 100 and the second flue gas circuit 200；
The flue gas circuit 200 of first flue gas circuit 100 and second includes：
Smoke backflow section 01, the second end of the smoke backflow section 01 is as inlet end, and second end is with being arranged at boiler
Before the chimney of combustion system, docked with the smoke-exhaust pipeline of boiler combustion system, for by smoke-exhaust pipeline collection boiler combustion
The flue gas of burning system discharge；
Fresh air section 02, the second end of the fresh air section 02 is as inlet end, and the sky for obtaining in external environment condition enters, will be outer
Air in portion's environment introduces the double loop smoke backflow system；
Mixed wind section 03, the smoke backflow section 01, fresh air section 02 and the section 03 first end docking of mixed wind, the mixed wind section 03
Second end is connected with the air channel of boiler combustion system, wherein, the second end of the mixed wind of first flue gas circuit 100 section 03 with
Air channel is connected, and the second end of the mixed wind section 03 of second flue gas circuit 200 is connected with secondary air duct, for described
Air channel and secondary air duct provide backflow flue gas and new air；
The air-introduced machine 04 at the second end of the smoke backflow section 01 is arranged on, the air-introduced machine 04 is used to provide flue gas by arranging
Smoke pipe pass enters the power of the smoke backflow section 01, and its power output is bigger, and the smoke backflow section is introduced by smoke-exhaust pipeline
01 exhaust gas volumn is more；
The pressure fan 05 at the second end of the fresh air section 02 is arranged on, the blower-use is in the new air of offer by external rings
Border introduces the power of the fresh air section 02, and its power output is bigger, and the new air capacity of the fresh air section 02 is introduced by external environment condition
It is more.
Second end of the mixed wind section of first flue gas circuit 100 is connected with the primary side air channel of steam generator system, and described the
Second end of two flue gas circuits 200 is connected with the secondary side air channel of steam generator system.
In technical scheme disclosed in the above embodiments of the present application, by by flue gas and new air return to the First air
Road and secondary air duct so that NOX, CO, coal particle in flue gas etc. are again introduced into boiler, are burnt again to it, so that
Coal-fired utilization rate is improved, the content of the material such as NOX, CO, coal particle in the flue gas of boiler combustion system discharge is reduced.
It is pointed out that due to including substantial amounts of inert gas in flue gas, the application by flue gas by being mixed into First air
Road, it with effective guarantee pulverized coal preparation system detonation possibility, can improve the security of boiler combustion system.
By injecting flue gas to secondary air duct, the oxygen content in primary zone can be reduced, while increasing the wind of secondary air duct
Amount, improves the thermal efficiency of boiler, reduces the content of fly ash combustible material in flue gas, reduces coal consumption, increases peculiar economic benefit.
Meanwhile, by injecting flue gas to an air channel and secondary air duct, first and second air quantity is added, is made in burner hearth
Fuel is sufficiently mixed with air, and inner flue gas of the stove flow strength increases, and fuel around water-cooling wall can be made to be difficult aggregation, so as to drop
Low coking phenomenon.The backflow flue gas of hypothermia and hypoxia, can also reduce the partial combustion flue-gas temperature of combustion zone, can effectively prevent
Only or alleviate adherent burning when using low melting point coal operating mode and coking problem.
In technical scheme disclosed in the embodiment of the present application, the type of the air-introduced machine 04 can be according to user's request voluntarily
Choose, for example, in technical scheme disclosed in the embodiment of the present application, the air-introduced machine 04 is booster fan；
The power for the boiler combustion system applied according to the double loop smoke backflow system is different, the double loop flue gas
The exhaust gas volumn that return-flow system is extracted is different, for example, when the boiler combustion system is operated in 200MW operating modes, the double loop
The exhaust gas volumn of smoke backflow system acquisition now to discharge the 6% of exhaust gas volumn, meanwhile, it has been investigated that, an air channel and secondary
The exhaust gas volumn that air channel is mixed into needs to set within the specific limits, to prevent being mixed into excessive cigarette to an air channel and secondary air duct
Tolerance, and cause boiler combustion system can not normal work, for example, in the above-described embodiments when the boiler combustion system work
In 200MW operating modes, the air quantity of the booster fan (air-introduced machine) in first flue gas circuit 100 is no more than steam generator system
The 6% of the exhaust gas volumn produced during 200MW operating modes, air quantity allowance takes 20%, and pressure head allowance takes 30%；Second flue gas circuit
The air quantity of booster fan in 200 is no more than the 9% of the exhaust gas volumn produced during steam generator system 200MW operating modes, and air quantity allowance takes
20%, pressure head allowance takes 30%.
In technical scheme disclosed in another embodiment of the application, in order to reduce noise, the booster fan is centrifugal
Blower fan, the centrifugal blower air intake vent is provided with muffler, and the centrifugal blower is coated with acoustic material.
In order to make full use of the waste heat in flue gas, and the flue gas circuit 200 of the first flue gas circuit 100 and second is carried out
Protection, said system can also include：On the flue for being coated on the flue gas circuit 200 of the first flue gas circuit 100 and second
Rock wool heat-preservation layer and sampling plate protective layer.
In technical scheme disclosed in the above embodiments of the present application, staff monitors be mixed into First air in real time for convenience
The exhaust gas volumn in road and secondary air duct, referring to Fig. 2, can also include in the above-mentioned flue gas circuit 200 of first flue gas circuit 100 and second
One first flowmeter 06, the first flowmeter 06 is arranged on the smoke backflow section 01, and it is used to count the smoke backflow
The exhaust gas volumn that section 01 flows through, to facilitate user to introduce the exhaust gas volumn of smoke backflow section 01 by the monitoring in real time of air-introduced machine 04.
In order to prevent that fresh air flows into the smoke backflow section 01, and the application is above-mentioned when the air quantity in fresh air section 02 is excessive
In technical scheme disclosed in embodiment, a cooling gas check valve can be set in the smoke backflow section 01, it is used to control the cigarette
Second end of gas reflux section 01 is conducting direction to the direction of first end, and the direction of first end to the second end can not be turned on.
User regulates and controls to the exhaust gas volumn and resh air requirement that are mixed into an air channel and secondary air duct for convenience, this Shen
Please such scheme can also include：With the air-introduced machine 04 in the flue gas circuit 200 of the first flue gas circuit 100 and second and sending
The connected controller of fan of blower fan 05, it is used for the power output for controlling the air-introduced machine 04 and pressure fan 05, and the controller can
Think touch screen type controller, exported for air-introduced machine 04 and pressure fan 05 described in the control box according to user for its output work
The power control signal that rate is adjusted.
In technical scheme disclosed in the above embodiments of the present application, the stable operation of boiler combustion system for convenience, on
Stating system also needs to measure the oxygen content in the mixed wind section, to prevent the flue gas for injecting an air channel and secondary air duct
In too high oxygen level or too low, therefore, referring to Fig. 2, in such scheme, can also include：
Oxygen content tester 07 for testing gas oxygen content in mixed wind section, the oxygen measurement set 07 be used to measure and
Oxygen content in the mixed wind section 03 of display, meanwhile, it can also export the information warning matched with current oxygen content, for example, working as
When oxygen content exceeds preset range, the oxygen measurement 07 can be with outputting alarm signal, to point out staff to mix wind
Section oxygen content is abnormal.
In double loop smoke backflow system disclosed in another embodiment of the application, it can also include：It is arranged on described new
The second flowmeter of wind section；
The precaution device being connected with the first flowmeter and second flowmeter, for exporting and the first flowmeter and the
The pre-warning signal that the ratio of the metering numerical value of two flowmeters matches, for example, when the variable of the first flowmeter and second
The ratio between variable of flowmeter, during beyond setting range, exports predetermined warning signal.
In technical scheme disclosed in the above embodiments of the present application, the smoke-exhaust pipeline of boiler can also be regard as above-mentioned double back
A part for road smoke backflow system, i.e. the double loop smoke backflow system can also include the smoke evacuation of boiler combustion system
Pipeline, the first end of the smoke-exhaust pipeline is connected with boiler outlet air end, the second end pass sequentially through preheater, environmental transformation system,
It is connected after electric cleaner with chimney.
Each instrument in the smoke backflow system of staff's implementing monitoring double loop is detected and each for convenience
A PC can also be included in the working condition of power-equipment, the above-mentioned double loop smoke backflow system of the application, the PC can be with
For computer or man-machine interactive platform etc., itself and the first flow in the flue gas circuit 200 of the first flue gas circuit 100 and second
Meter, second flowmeter, air-introduced machine are connected with pressure fan；
The PC is used to obtain the defeated of the first flowmeter and second flowmeter measuring parameter, air-introduced machine and pressure fan
Go out power, be additionally operable to export for controlling air-introduced machine and pressure fan to the air-introduced machine and pressure fan according to user operation instruction
The control signal of working condition.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (9)
1. a kind of double loop smoke backflow system, it is characterised in that including：
The flue gas circuit of structure identical first and the second flue gas circuit；
First flue gas circuit and the second flue gas circuit include：
Smoke backflow section, fresh air section and mixed wind section, wherein, first end, the first end of smoke backflow section of the smoke backflow section
With the section first end docking of mixed wind, the second end of the smoke backflow section and the smoke-exhaust pipeline phase between electric dust removing system and chimney
Even, the second end of the fresh air section is used to introduce fresh air；
The air-introduced machine at the second end of the smoke backflow section is arranged on, the exhaust gas volumn that the air-introduced machine is introduced is default exhaust gas volumn；
It is arranged on the pressure fan at the second end of the fresh air section；
Second end of the mixed wind section of first flue gas circuit is connected with the primary side air channel of steam generator system, and second flue gas is returned
Second end on road is connected with the secondary side air channel of steam generator system.
2. smoke backflow system in double loop according to claim 1, it is characterised in that the air-introduced machine is booster fan；
The exhaust gas volumn produced during the air quantity selection steam generator system 200MW operating modes of the booster fan in first flue gas circuit
6%, air quantity allowance takes 20%, and pressure head allowance takes 30%；
The exhaust gas volumn produced during the air quantity selection steam generator system 200MW operating modes of the booster fan in second flue gas circuit
9%, air quantity allowance takes 20%, and pressure head allowance takes 30%.
3. smoke backflow system in double loop according to claim 2, it is characterised in that the booster fan is centrifugal wind
Machine, the centrifugal blower air intake vent is provided with muffler, and the centrifugal blower is coated with acoustic material.
4. smoke backflow system in double loop according to claim 1, it is characterised in that also include：
It is coated on rock wool heat-preservation layer and sampling plate protective layer on the flue of first flue gas circuit and the second flue gas circuit.
5. smoke backflow system in double loop according to claim 1, it is characterised in that first flue gas circuit and second
Flue gas circuit also includes：
It is arranged on the first flowmeter in smoke backflow section.
6. smoke backflow system in double loop according to claim 1, it is characterised in that also include：
It is connected with the air-introduced machine and pressure fan, the air-blower control of the power output for controlling the air-introduced machine and pressure fan
Device.
7. smoke backflow system in double loop according to claim 1, it is characterised in that first flue gas circuit and second
Flue gas circuit also includes：
Oxygen content tester for testing gas oxygen content in mixed wind section.
8. smoke backflow system in double loop according to claim 5, it is characterised in that first flue gas circuit and second
Flue gas circuit also includes：
It is arranged on the second flowmeter of the fresh air section；
The precaution device being connected with the first flowmeter and second flowmeter, for exporting and the first flowmeter and second
The pre-warning signal that the ratio of the metering numerical value of gauge matches.
9. smoke backflow system in double loop according to claim 8, it is characterised in that also include：
With first flowmeter, second flowmeter, air-introduced machine and the pressure fan in first flue gas circuit and the second flue gas circuit
Connected PC；
The PC is used for the output work for obtaining the first flowmeter and second flowmeter measuring parameter, air-introduced machine and pressure fan
Rate, is additionally operable to export the work for controlling air-introduced machine and pressure fan to the air-introduced machine and pressure fan according to user operation instruction
The control signal of state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621144147.9U CN206398738U (en) | 2016-10-21 | 2016-10-21 | A kind of double loop smoke backflow system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621144147.9U CN206398738U (en) | 2016-10-21 | 2016-10-21 | A kind of double loop smoke backflow system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206398738U true CN206398738U (en) | 2017-08-11 |
Family
ID=59508298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621144147.9U Expired - Fee Related CN206398738U (en) | 2016-10-21 | 2016-10-21 | A kind of double loop smoke backflow system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206398738U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521899A (en) * | 2021-07-29 | 2021-10-22 | 福建龙净环保股份有限公司 | Ash removal method of bag type dust collector |
-
2016
- 2016-10-21 CN CN201621144147.9U patent/CN206398738U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521899A (en) * | 2021-07-29 | 2021-10-22 | 福建龙净环保股份有限公司 | Ash removal method of bag type dust collector |
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