CN207112780U - A kind of gas-fired Boiler System and its flue gas recirculation nitrogen oxides emission reduction device - Google Patents
A kind of gas-fired Boiler System and its flue gas recirculation nitrogen oxides emission reduction device Download PDFInfo
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- CN207112780U CN207112780U CN201720889217.1U CN201720889217U CN207112780U CN 207112780 U CN207112780 U CN 207112780U CN 201720889217 U CN201720889217 U CN 201720889217U CN 207112780 U CN207112780 U CN 207112780U
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- blower
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- reduction device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model discloses a kind of gas-fired Boiler System and its flue gas recirculation nitrogen oxides emission reduction device, gas-fired Boiler System includes boiler body and the chimney being connected with the outlet of boiler body, the recirculation blower that emission reduction device includes recycling smoke pipe and is connected on recycling smoke pipe, the both ends of recycling smoke pipe connect outlet and the entrance of boiler body respectively, emission reduction device also includes smoke components online acquisition device, recycling frequency converter and control unit, smoke components online acquisition device and is connected on chimney；Recycling frequency converter is connected on recirculation blower；Control unit electrically connects smoke components online acquisition device and recycling frequency converter.Tthe utility model system is formed simply, preferably can be issued to the effect of reduction discharged nitrous oxides in guarantee boiler output and efficiency premise, and each parameter adjustment control is relatively independent, avoids and interferes.
Description
Technical field
Boiler air pollution emission control technology field is the utility model is related to, is followed again more particularly to a kind of combustion gas flue gas
Cyclic n-oxides emission reduction device and the gas-fired Boiler System including the device.
Background technology
With vigorously promoting the use for clean energy resource, a large amount of gas fired-boilers substitute traditional coal-burning boiler and appear in each city
In.But the frequent generation of haze weather in recent years, the pollution problem of gas fired-boiler nitrogen oxides also increasingly cause the weight of people
Depending on various regions have also put into effect stricter environmental protection standard and new want is proposed to boiler tail emission limits of nitrogen oxides successively
Ask.
The nitrogen oxides generated in combustion process can be divided into three classes：Fuel type NOx, thermal NO x and Quick-type NOx.Combustion
Material type NOx is to aoxidize generation in combustion containing nitrogen compound in fuel.Thermal NO x is air in combustion process
In nitrogen aoxidize generation at high temperature.Quick-type NOx is by the N in air2With the ionic hydrocarbon group (CH etc.) in fuel
Reaction generation.Nitrogen oxides caused by gas fired-boiler burning, about 80% belongs to thermal NO x, and fraction is Quick-type NOx, base
This is free of fuel type NOx.
Flue gas recirculation combustion technology is to extract partial fume to mix with air in feeding stove, due to the heat-absorbing action of flue gas
Flame temperature is reduced, and dilutes oxygen concentration, reduces burning velocity, reduces thermal NO x generations.Flue gas recirculation is special
It is the most notable for the NOx reduction of gas fired-boiler suitable for the low fuel of nitrogen content.
Utility model content
Technical problem to be solved of the present utility model is to reduce the discharged nitrous oxides of gas fired-boiler, there is provided a kind of structure
Into the flexible flue gas recirculation nitrogen oxides emission reduction device of relatively easy, control mode and the gas fired-boiler system including the device
System, influence of the flue gas to air quality is discharged to reduce gas fired-boiler.
To achieve these goals, flue gas recirculation nitrogen oxides emission reduction device of the present utility model, with a gas fired-boiler
System connects, and the gas-fired Boiler System includes boiler body and the chimney being connected with the outlet of the boiler body, institute
Stating emission reduction device includes recycling smoke pipe and the recirculation blower being connected on the recycling smoke pipe, the recycling smoke pipe
Both ends connect outlet and the entrance of the boiler body respectively, wherein, the emission reduction device also includes：Smoke components are online
Collector, it is connected on the chimney；Frequency converter is recycled, is connected on the recirculation blower；Control unit, electrically connect institute
State smoke components online acquisition device and recycling frequency converter.
In one embodiment of above-mentioned flue gas recirculation nitrogen oxides emission reduction device, the gas-fired Boiler System also includes
Air blower, the air blower are connected to the porch of the boiler body.
In one embodiment of above-mentioned flue gas recirculation nitrogen oxides emission reduction device, in addition to：Furnace pressure collector,
It is connected in the boiler body；Blower variable frequency device, it is connected on the air blower；Air pressure collector, it is connected to institute
The outlet of air blower is stated, wherein, the furnace pressure collector, blower variable frequency device and air pressure collector are electrically connected respectively
Connect described control unit.
In one embodiment of above-mentioned flue gas recirculation nitrogen oxides emission reduction device, the gas-fired Boiler System also includes
Air preheater and water inlet pipe, the air preheater are connected to the porch of the air blower, described in the water inlet pipe connection
Boiler body and air preheater.
In one embodiment of above-mentioned flue gas recirculation nitrogen oxides emission reduction device, in addition to：Air themperature collector,
It is connected to the outlet of the air preheater；Air temperature modification valve, it is connected on the water inlet pipe, wherein, the Air Temperature
Degree collector, air temperature modification valve are electrically connected described control unit.
The utility model also provides a kind of gas-fired Boiler System, including boiler body, flue gas recirculation nitrogen oxides emission reduction
The chimney of the outlet of device and the connection boiler body, the emission reduction device include recycling smoke pipe and are connected to described
The recirculation blower on smoke pipe is recycled, the both ends of the recycling smoke pipe connect the outlet of the boiler body and entered respectively
Mouthful, wherein, the emission reduction device also includes：Smoke components online acquisition device, is connected on the chimney；Recycle frequency converter,
It is connected on the recirculation blower；Control unit, electrically connect the smoke components online acquisition device and recycling frequency converter.
In one embodiment of above-mentioned gas-fired Boiler System, in addition to it is connected to the drum of the porch of the boiler body
Blower fan.
In one embodiment of above-mentioned gas-fired Boiler System, the emission reduction device also includes：Furnace pressure collector, even
It is connected in the boiler body；Blower variable frequency device, it is connected on the air blower；Air pressure collector, it is connected to described
The outlet of air blower, wherein, the furnace pressure collector, blower variable frequency device and air pressure collector are electrically connected
Described control unit.
In one embodiment of above-mentioned gas-fired Boiler System, in addition to air preheater and water inlet pipe, the air are pre-
Hot device is connected to the porch of the air blower, and the water inlet pipe connects the boiler body and air preheater.
In one embodiment of above-mentioned gas-fired Boiler System, the emission reduction device also includes：Air themperature collector, even
It is connected on the outlet of the air preheater；Air temperature modification valve, it is connected on the water inlet pipe, wherein, the air themperature
Collector, air temperature modification valve are electrically connected described control unit.
Beneficial functional of the present utility model is, Tthe utility model system forms simple, preferably can ensure that boiler goes out
Power and efficiency premise are issued to the effect for reducing discharged nitrous oxides.And each parameter adjustment control is relatively independent, avoid mutually
Interference.
The utility model is based on smoke components online acquisition device (NOx data) and recycling frequency converter and control unit is set
Put, variable frequency adjustment is carried out to recirculation blower；NOx data in flue gas, control unit are detected by smoke components online acquisition device
Reduced air unit frequency, the NOx content of control discharge flue gas are adjusted according to NOx data.
The utility model is based on air pressure collector, furnace pressure collector, smoke components online acquisition device (CO numbers
According to) and blower variable frequency device and control unit setting, to air blower carry out variable frequency adjustment；According to user's request load, automatically
Air intake and gas proportioning are adjusted, boiler output is met user's request.
Setting of the utility model based on air themperature collector, air temperature modification valve and control unit, passes through air
Temperature sampler detects air preheater outlet temperature, and control unit adjusts air themperature according to air preheater outlet temperature and adjusted
Valve is saved, realizes that air preheater outlet temperature is adjusted, avoids the generation of condensed water after flue gas mixing.
The utility model is described in detail below in conjunction with the drawings and specific embodiments, but not as to the utility model
Restriction.
Brief description of the drawings
Fig. 1 is the structural representation of gas-fired Boiler System of the present utility model；
Fig. 2 is that flue gas recirculation nitrogen oxides emission reduction device of the present utility model shows applied to the structure of gas-fired Boiler System
It is intended to；
Fig. 3 is control of the flue gas recirculation nitrogen oxides emission reduction device of the present utility model to recirculation blower variable frequency adjustment
Schematic diagram；
Fig. 4 is that the control that flue gas recirculation nitrogen oxides emission reduction device of the present utility model is adjusted to boiler inlet temperature is former
Reason figure；
Fig. 5 is the control principle that flue gas recirculation nitrogen oxides emission reduction device of the present utility model is adjusted to blower variable frequency
Figure.
Wherein, reference
100-steam generator system
110-boiler body
120-boiler body blast pipe
130-air blower
140-air blower blast pipe
150-air preheater
160-pipe
170-chimney
180-water inlet pipe
200-flue gas recirculation nitrogen oxides emission reduction device
210-recycling smoke pipe
220-recirculation blower
230-control unit
201-smoke components online acquisition device
202-recycling frequency converter
203-furnace pressure collector
204-blower variable frequency device
205-air pressure collector
206-air themperature collector
207-air temperature modification valve
Embodiment
Technical solutions of the utility model are described in detail with specific embodiment below in conjunction with the accompanying drawings, with further
Understand the purpose of this utility model, scheme and effect, but be not intended as the limit of the appended claims for the utility model protection domain
System.
Refering to Fig. 1 and Fig. 2, flue gas recirculation nitrogen oxides emission reduction device 200 of the present utility model and gas-fired Boiler System
100 connections, gas-fired Boiler System 100 include boiler body 110 and connect the chimney 170 in the exit of boiler body 110, subtract
The recirculation blower 220 that arranging device 200 includes recycling smoke pipe 210 and is connected on recycling smoke pipe 210, recycles smoke pipe
210 both ends connect outlet and the entrance of boiler body 110 respectively.Emission reduction device 200 also includes smoke components online acquisition
Device 201, recycling frequency converter 202 and control unit 230.Smoke components online acquisition device 201 is connected on chimney 170, is used
In gathering smoke components (CO, NOx) signal in chimney 170.Recycling frequency converter 202 is connected on recirculation blower 220, is used
In the working frequency of regulation recirculation blower 220.Control unit 230 electrically connects smoke components online acquisition device 201 and followed again
Ring frequency converter 202.
The signal that the utility model detects according to smoke components online acquisition device 201, is controlled by control unit 230 and followed again
Ring frequency converter 202, it is adjusted with the frequency to recirculation blower 220, and then adjusts the content of discharge nitrogen oxides in effluent,
Meet sets requirement to ensure to discharge NOx content in flue gas.Refering to Fig. 1 to Fig. 3, specific control strategy is：Pass through smoke components
Online acquisition device 201 detects smoke components NOx data in chimney 170, and control unit 230 is according to smoke components online acquisition device
The signal of 201 feedbacks and the smoke components NOx data of a setting, output signal to recycling frequency converter 202, pass through recycling
Frequency converter 202 is adjusted to the frequency of recirculation blower 220, so as to adjust the amount of flue gas recycled.
Gas-fired Boiler System 100 of the present utility model also includes air blower 130, and air blower 130 is connected to boiler body 110
Porch.Gas-fired Boiler System 100 also includes air preheater 150 and water inlet pipe 180, and air preheater 150 is connected to drum
The porch of blower fan 130, water inlet pipe 180 connect boiler body 110 and air preheater 150, boiler are utilized by water inlet pipe 180
The air of burning in high-temperature-hot-water (steam) heating air preheater 150 caused by body 110.
That is, in the utility model, air preheater 150, air blower 130, boiler body 110, chimney 170 are sequentially connected with,
Water inlet pipe 180 is connected between boiler body 110 and air preheater 150, and the both ends of recycling smoke pipe 210 connect boiler respectively
Between the outlet of body 110 and entrance.
In addition, be connected between the entrance of air preheater 150 and air blower 130 by air blower blast pipe 140, air blower
Be connected between 130 outlet and the entrance of gas fired-boiler 110 by boiler body blast pipe 120, the outlet of boiler body 110 and
It is connected between chimney 170 by pipe 160.In this way, the both ends of recycling smoke pipe 210 connect going out for boiler body 110 respectively
On the pipe 160 and boiler body blast pipe 120 that mouth and entrance are set.
With reference to figure 1, Fig. 2 and Fig. 5, flue gas recirculation nitrogen oxides emission reduction device 200 of the present utility model also includes burner hearth
Pressure acquisition devices 203, blower variable frequency device 204 and air pressure collector 205.Wherein, furnace pressure collector 203 connects
In boiler body 110, for gathering the furnace pressure signal of gas fired-boiler 110.Blower variable frequency device 204 is connected to air blower
On 130, for adjusting the working frequency of air blower 130.Air pressure collector 205 is connected to the outlet of air blower 130, you can
It is connected on boiler body blast pipe 120, for gathering air pressure signal after air blower 130.Furnace pressure collector 203,
Blower variable frequency device 204 and air pressure collector 205 are electrically connected control unit 230.
The signal that the utility model gathers according to furnace pressure collector 203 and air pressure collector 205, passes through control
Unit 230 processed controls blower variable frequency device 204 to be adjusted with the frequency to air blower 130.The frequency regulation one of air blower 130
It is in order that furnace pressure is stable on pressure-fired, reduces the fluctuation of furnace pressure, ensure the stability of burning, second, to the greatest extent may be used
CO content in smoke can be reduced, reduces heat loss due to incomplete combustion, ensures boiler efficiency.Refering to Fig. 5, specific control strategy is：
Furnace pressure collector 203 detects furnace pressure, and air pressure collector 205 detects inlet air of boiler pressure, control unit 230
The signal gathered according to furnace pressure collector 203 and air pressure collector 205 carries out differential pressure calculating, and according to pressure difference and setting
The frequency of air blower 130 is adjusted to blower variable frequency device 204 for value output signal.Smoke components online acquisition device simultaneously
201 detection CO content in smoke, the signal and a setting that control unit 230 is fed back according to smoke components online acquisition device 201
Smoke components CO data be adjusted, Regulate signal exports to blower variable frequency device 204 that the frequency of air blower 130 is entered to advance
The adjustment of one step.
With reference to figure 1, Fig. 2 and Fig. 4, flue gas recirculation nitrogen oxides emission reduction device 200 of the present utility model also includes air
Temperature sampler 206 and air temperature modification valve 207.Wherein, air themperature collector 206 is connected to air preheater 150
Outlet, you can be connected on air blower blast pipe 140, for gather from air preheater 150 discharge air temperature signal.
Air temperature modification valve 207 is connected on water inlet pipe 180, wherein, air themperature collector 206, air temperature modification valve 207 divide
Electricity Lian Jie not control unit 230.
The signal that the utility model gathers according to air themperature collector 206, air themperature is controlled by control unit 230
Regulating valve 207 by water inlet (steam) flow of the air inlet preheater 150 of water inlet pipe 180 with to being adjusted.Air preheat
The outlet temperature regulation of device 150 is in order that boiler inlet temperature is stable more than setting value, to avoid air from being mixed with flue gas
The generation of condensed water afterwards.With reference to figure 4, specific control strategy is：Air themperature collector 206 detects air preheater 150 and exported
Air themperature, the signal and a design temperature that control unit 230 is fed back according to air themperature collector 206 are adjusted, and adjust
Signal output is saved to air temperature modification valve 207, to adjust the water (steam) by the air inlet preheater 150 of water inlet pipe 180
Flow.
Wherein, control system of the present utility model is in order to preferably ensure that boiler output and efficiency premise be issued to reduction
The effect of discharged nitrous oxides, control system preferably use DCS control systems, and DCS is the English of dcs
Distributed Control System abbreviation, at home automatic control industry be also referred to as Distributed Control System.
Certainly, the utility model can also have other various embodiments, without departing substantially from the utility model spirit and its essence
In the case of, those skilled in the art work as can make various corresponding changes and deformation according to the utility model, but these
Corresponding change and deformation should all belong to the scope of the claims appended by the utility model.
Claims (10)
1. a kind of flue gas recirculation nitrogen oxides emission reduction device, is connected with a gas-fired Boiler System, the gas-fired Boiler System bag
Include boiler body and the chimney being connected with the outlet of the boiler body, the emission reduction device include recycling smoke pipe and
The recirculation blower being connected on the recycling smoke pipe, the both ends of the recycling smoke pipe connect the boiler body respectively
Outlet and entrance, it is characterised in that the emission reduction device also includes：
Smoke components online acquisition device, is connected on the chimney；
Frequency converter is recycled, is connected on the recirculation blower；And
Control unit, electrically connect the smoke components online acquisition device and recycling frequency converter.
2. flue gas recirculation nitrogen oxides emission reduction device according to claim 1, it is characterised in that the gas fired-boiler system
System also includes air blower, and the air blower is connected to the porch of the boiler body.
3. flue gas recirculation nitrogen oxides emission reduction device according to claim 2, it is characterised in that also include：
Furnace pressure collector, it is connected in the boiler body；
Blower variable frequency device, it is connected on the air blower；And
Air pressure collector, the outlet of the air blower is connected to, wherein, the furnace pressure collector, blower variable frequency
Device and air pressure collector are electrically connected described control unit.
4. the flue gas recirculation nitrogen oxides emission reduction device according to any one of claim 2 to 3, it is characterised in that described
Gas-fired Boiler System also includes air preheater and water inlet pipe, and the air preheater is connected to the porch of the air blower,
The water inlet pipe connects the boiler body and air preheater.
5. flue gas recirculation nitrogen oxides emission reduction device according to claim 4, it is characterised in that also include：
Air themperature collector, it is connected to the outlet of the air preheater；And
Air temperature modification valve, it is connected on the water inlet pipe, wherein, the air themperature collector, air temperature modification valve
It is electrically connected described control unit.
6. a kind of gas-fired Boiler System, including boiler body, flue gas recirculation nitrogen oxides emission reduction device and the connection pot
The chimney of the outlet of furnace body, the emission reduction device include recycling smoke pipe and are connected to following again on the recycling smoke pipe
Ring blower fan, the both ends of the recycling smoke pipe connect outlet and the entrance of the boiler body respectively, it is characterised in that described
Emission reduction device also includes：
Smoke components online acquisition device, is connected on the chimney；
Frequency converter is recycled, is connected on the recirculation blower；And
Control unit, electrically connect the smoke components online acquisition device and recycling frequency converter.
7. gas-fired Boiler System according to claim 6, it is characterised in that also include being connected to entering for the boiler body
Air blower at mouthful.
8. gas-fired Boiler System according to claim 7, it is characterised in that the emission reduction device also includes：
Furnace pressure collector, it is connected in the boiler body；
Blower variable frequency device, it is connected on the air blower；And
Air pressure collector, the outlet of the air blower is connected to, wherein, the furnace pressure collector, blower variable frequency
Device and air pressure collector are electrically connected described control unit.
9. according to the gas-fired Boiler System described in any one of claim 7 to 8, it is characterised in that also including air preheater and
Water inlet pipe, the air preheater are connected to the porch of the air blower, and the water inlet pipe connects the boiler body and sky
Air preheater.
10. gas-fired Boiler System according to claim 9, it is characterised in that the emission reduction device also includes：
Air themperature collector, it is connected to the outlet of the air preheater；And
Air temperature modification valve, it is connected on the water inlet pipe, wherein, the air themperature collector, air temperature modification valve
It is electrically connected described control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720889217.1U CN207112780U (en) | 2017-07-20 | 2017-07-20 | A kind of gas-fired Boiler System and its flue gas recirculation nitrogen oxides emission reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720889217.1U CN207112780U (en) | 2017-07-20 | 2017-07-20 | A kind of gas-fired Boiler System and its flue gas recirculation nitrogen oxides emission reduction device |
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| Publication Number | Publication Date |
|---|---|
| CN207112780U true CN207112780U (en) | 2018-03-16 |
Family
ID=61584928
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720889217.1U Active CN207112780U (en) | 2017-07-20 | 2017-07-20 | A kind of gas-fired Boiler System and its flue gas recirculation nitrogen oxides emission reduction device |
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| Country | Link |
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| CN (1) | CN207112780U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587066A (en) * | 2021-08-10 | 2021-11-02 | 岳阳恒盛石化科技有限公司 | Combustion control device and method for gas-fired boiler |
| CN113739197A (en) * | 2021-08-30 | 2021-12-03 | 重庆赛迪热工环保工程技术有限公司 | Low-nitrogen combustion method for radiant tube heating system |
-
2017
- 2017-07-20 CN CN201720889217.1U patent/CN207112780U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587066A (en) * | 2021-08-10 | 2021-11-02 | 岳阳恒盛石化科技有限公司 | Combustion control device and method for gas-fired boiler |
| CN113739197A (en) * | 2021-08-30 | 2021-12-03 | 重庆赛迪热工环保工程技术有限公司 | Low-nitrogen combustion method for radiant tube heating system |
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