CN210566301U - Boiler high temperature flue gas recirculation FGR butterfly valve control system - Google Patents
Boiler high temperature flue gas recirculation FGR butterfly valve control system Download PDFInfo
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- CN210566301U CN210566301U CN201921036336.8U CN201921036336U CN210566301U CN 210566301 U CN210566301 U CN 210566301U CN 201921036336 U CN201921036336 U CN 201921036336U CN 210566301 U CN210566301 U CN 210566301U
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- Prior art keywords
- flue gas
- butterfly valve
- fgr
- boiler
- control system
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000003546 flue gas Substances 0.000 title claims abstract description 80
- 239000007789 gas Substances 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000003517 fume Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 28
- 239000003345 natural gas Substances 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000000779 smoke Substances 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model discloses a boiler high temperature flue gas recirculation FGR butterfly valve control system, including boiler, flue gas back flow, NDS sensor, FGR circulation control device, combustor and flue gas automatic butterfly valve, the tub front end of discharging fume of boiler is provided with the NDS sensor, the end respectively with flue gas back flow and chimney intercommunication, the flue gas back flow passes through the combustor intercommunication of combustor and boiler, and is provided with flue gas automatic butterfly valve on the flue gas back flow, NDS sensor and flue gas automatic butterfly valve all are connected with FGR circulation control device. The utility model discloses can realize the flow of extrinsic cycle high temperature flue gas on the automatic control boiler, reach the effect that the low nitrogen of boiler tail gas discharged.
Description
Technical Field
The utility model relates to a boiler combustion technology field, more specifically the utility model relates to a boiler high temperature flue gas recirculation FGR butterfly valve control system that says so.
Background
Nitrogen oxides are the main sources of acid rain, greenhouse effect and photochemical smog, seriously affect the living environment of people and become the focus of attention. Wherein nearly half of the total NO emissions come from the thermal power plant.
The emission of nitrogen oxides of the currently used boiler cannot meet the requirements, and in the prior art, although a related control system is developed to control the emission of the flue gas of the boiler, the emission of the flue gas cannot be controlled within a reasonable range.
Therefore, how to provide a control system capable of maintaining the amount of boiler flue gas emission within a certain range is a problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a boiler high temperature flue gas recirculation FGR butterfly valve control system can control boiler flue gas circulation volume, and then controls emission of flue gas volume in reasonable numerical value, has satisfied ecological environment's requirement.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a boiler high temperature flue gas recirculation FGR butterfly valve control system, includes: boiler, flue gas back flow, NDS sensor, FGR circulation control device, combustor and flue gas automatic butterfly valve, the tub front end of discharging fume of boiler is provided with the NDS sensor, the end respectively with flue gas back flow and chimney intercommunication, the flue gas back flow pass through the combustor with the combustion chamber intercommunication of boiler, just be provided with on the flue gas back flow flue gas automatic butterfly valve, the NDS sensor with flue gas automatic butterfly valve all with FGR circulation control device connects.
Further, FGR circulating control device includes the PLC host computer, NDS sensor with flue gas automatic butterfly valve all with PLC host computer wired connection.
Further, still include condensate water separator, condensate water separator sets up between flue gas return pipe and the combustor.
Furthermore, a control baffle plate for collecting air flow is arranged at an air inlet of the fan of the burner, and the control baffle plate is positioned at the top end of the condensed water separator.
Further, still include the natural gas conveying pipe, the natural gas conveying pipe with the combustor is connected.
Further, a gas butterfly valve is arranged on the natural gas conveying pipe.
Furthermore, the device also comprises a condensed water collecting pipe which is arranged at the bottom end of the condensed water separator.
Furthermore, the condensed water collecting pipe is connected with a condensed water collecting device.
Furthermore, a regulating valve is arranged on the condensed water collecting pipe.
According to the above technical scheme, compare with prior art, the utility model discloses a boiler high temperature flue gas recirculation FGR butterfly valve control system, flue gas volume through NDS sensor detection boiler production, the NDS sensor gives FGR circulation controlling means signals, surpass the emission standard when flue gas volume, FGR circulation controlling means increases the angle of opening of automatic butterfly valve of flue gas, send into most flue gas once more through flue gas back flow and combustor and carry out the postcombustion in the boiler, when the flue gas is at the emission standard scope, reduce the angle of opening of automatic butterfly valve of flue gas again, and then make the boiler flue gas that discharges through the chimney keep in reasonable numerical value.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a boiler high-temperature flue gas recirculation FGR butterfly valve control system provided by the present invention.
FIG. 2 is a structural block diagram of a boiler high-temperature flue gas recirculation FGR butterfly valve control system provided by the utility model.
Figure 3 the attached drawing is the utility model provides a NDS sensor, FGR circulation control device and automatic butterfly valve of flue gas connect the schematic diagram.
Fig. 4 is a schematic structural diagram of a condensate separator according to the present invention.
Wherein,
1. boiler, 2, flue gas back flow pipe, 3, NDS sensor, 4, FGR circulation control device, 5, combustor, 6, flue gas automatic butterfly valve, 7, condensate water separator, 71, casing, 72, center pin, 73, swirl vane, 8, control baffle, 9, natural gas conveying pipe, 10, condensate water collecting pipe, 11, gas butterfly valve, 12, condensate water collecting device, 13, governing valve, 14 chimney.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses boiler high temperature flue gas recirculation FGR butterfly valve control system, as shown in fig. 1-3, include: boiler 1, flue gas back flow 2, NDS sensor 3, FGR circulation control device 4, combustor 5, flue gas automatic butterfly valve 6, condensate water separator 7, control baffle 8, natural gas transportation pipe 9, condensate water collecting pipe 10 and chimney 14, boiler 1's the tub front end of discharging fume is provided with NDS sensor 3, the end communicates with flue gas back flow 2 and chimney 14 respectively, condensate water separator 7 sets up between flue gas back flow 2 and combustor 5, combustor 5 is connected with natural gas transportation pipe 9, flue gas back flow 2 loops through condensate water separator 7, control baffle 8, combustor 5 communicates with boiler 1's combustion chamber, and be provided with flue gas automatic butterfly valve 6 on the flue gas back flow 2, FGR circulation control device 4 includes the PLC host computer, NDS sensor 3 and flue gas automatic butterfly valve 6 all with PLC host computer wired connection.
The control baffle plate 8 is positioned at the top end of the condensed water separator 7, the condensed water collecting pipe 10 is installed at the bottom end of the condensed water separator 7, and the condensed water collecting pipe 10 is connected with a condensed water collecting device 12.
As shown in fig. 4, the condensate water separator 7 includes a vertically disposed housing 71, a central shaft 72, and swirl vanes 73 fixed around the central shaft 72, the housing 71 is cylindrical and open at the top, the central shaft 72 is vertically fixed at the bottom center of the housing 71, and the swirl vanes 73 and the side wall of the housing 71 form an air flow passage.
The mode that the rotational flow blades 73 are fixed is adopted, the rotational flow blades are surrounded by the inner wall of the shell 71, and the rotational flow blades and the shell form an air flow channel.
Specifically, set up condensate water separator 7 between flue gas reflux pipe 2 and 5 fan air intakes of combustor, the flue gas of flue gas reflux pipe 2 transmission through the suction of fan, send into the combustor through the airflow channel that whirl blade 73 and casing 71 formed, through around the high-speed rotatory spiral of airflow channel and rise, the rotatory mode by motor drive of traditional centrifugal device blade has been got rid of, the energy has been saved, utilize the gas-liquid density difference, make the liquid drop at whirl blade 73's wall gathering under the effect of centrifugal force, water drips the bottom in the casing under the effect of gravity after the condensation, in leading-in condensate water collection device 12 through condensate water collecting pipe 10, and dry flue gas and natural gas are burnt once more, the utilization ratio is improved.
And, control baffle 8 has increased the suction of fan, has improved the recovery effect to the flue gas.
The utility model discloses a working process does:
the smoke quantity generated by the boiler 1 is detected by the NDS sensor 3, one part of the smoke enters the condensed water separator 7 through the smoke return pipe 2, and the other part of the smoke is discharged into the air through the chimney 14, because the smoke contains gases such as NO compounds and water vapor, the water vapor in the smoke entering the condensed water separator 7 is condensed and drops into the condensed water collecting pipe 10 under the action of gravity, the gases such as NO compounds enter the combustor 5 under the action of the suction force of the fan of the combustor 5, and simultaneously, the natural gas entering the combustor through the natural gas delivery pipe 9 and combustion-supporting air introduced by the fan are mixed at the head of the combustor 5 and are sent into the boiler 1 to be ignited again.
The utility model discloses the theory of operation does:
the PLC host computer sets for the corresponding relation between flue gas flow and the automatic butterfly valve of flue gas and opens the angle, sends the flue gas flow that detects through NDS sensor 3 for the PLC host computer, and the PLC host computer and then the angle that the automatic butterfly valve of control flue gas opened, through the control to the outer loop high temperature flue gas flow on the automatic control boiler, and then the control is from chimney 14 exhaust flue gas flow, reaches the effect of boiler tail gas low nitrogen emission.
It should be noted here that the present invention relates only to the protection of the system structure, and the program set for the PLC upper computer belongs to the conventional program, which does not belong to the scope of the present invention.
In order to further optimize the technical scheme, a gas butterfly valve 11 is arranged on the natural gas conveying pipe 9 and used for controlling the flow of the natural gas, and an adjusting valve 13 is arranged on the condensed water collecting pipe 10 and used for controlling the discharge of the condensed water conveniently.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a boiler high temperature flue gas recirculation FGR butterfly valve control system which characterized in that includes: boiler (1), flue gas back flow pipe (2), NDS sensor (3), FGR circulation control device (4), combustor (5), flue gas automatic butterfly valve (6) and chimney (14), the tub front end of discharging fume of boiler (1) is provided with NDS sensor (3), terminal respectively with flue gas back flow pipe (2) and chimney (14) intercommunication, flue gas back flow pipe (2) are passed through combustor (5) with the combustion chamber intercommunication of boiler (1), just be provided with on flue gas back flow pipe (2) flue gas automatic butterfly valve (6), NDS sensor (3) with flue gas automatic butterfly valve (6) all with FGR circulation control device (4) are connected.
2. The boiler high-temperature Flue Gas Recirculation (FGR) butterfly valve control system according to claim 1, wherein the FGR circulation control device (4) comprises a PLC host computer, and the NDS sensor (3) and the flue gas automatic butterfly valve (6) are connected with the PLC host computer by wire.
3. A boiler high temperature flue gas recirculation FGR butterfly valve control system according to claim 1, further comprising a condensed water separator (7), the condensed water separator (7) being arranged between the flue gas return pipe (2) and the burner (5).
4. The boiler high-temperature Flue Gas Recirculation (FGR) butterfly valve control system according to claim 3, wherein a control baffle (8) for collecting air flow is arranged at the air inlet of the fan of the burner (5), and the control baffle (8) is located at the top end of the condensed water separator (7).
5. The boiler high temperature Flue Gas Recirculation (FGR) butterfly valve control system according to claim 1, further comprising a natural gas delivery pipe (9), wherein the natural gas delivery pipe (9) is connected with the burner (5).
6. The boiler high-temperature Flue Gas Recirculation (FGR) butterfly valve control system according to claim 5, wherein a gas butterfly valve (11) is arranged on the natural gas delivery pipe (9).
7. The boiler high-temperature Flue Gas Recirculation (FGR) butterfly valve control system according to claim 3, further comprising a condensed water collecting pipe (10), wherein the condensed water collecting pipe (10) is installed at the bottom end of the condensed water separator (7).
8. The boiler high-temperature Flue Gas Recirculation (FGR) butterfly valve control system according to claim 7, wherein the condensed water collecting pipe (10) is connected with a condensed water collecting device (12).
9. The boiler high-temperature Flue Gas Recirculation (FGR) butterfly valve control system according to claim 7, wherein the condensed water collecting pipe (10) is provided with a regulating valve (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921036336.8U CN210566301U (en) | 2019-07-04 | 2019-07-04 | Boiler high temperature flue gas recirculation FGR butterfly valve control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921036336.8U CN210566301U (en) | 2019-07-04 | 2019-07-04 | Boiler high temperature flue gas recirculation FGR butterfly valve control system |
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| Publication Number | Publication Date |
|---|---|
| CN210566301U true CN210566301U (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921036336.8U Active CN210566301U (en) | 2019-07-04 | 2019-07-04 | Boiler high temperature flue gas recirculation FGR butterfly valve control system |
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| CN (1) | CN210566301U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296220A (en) * | 2019-07-04 | 2019-10-01 | 杨龙 | A kind of high temperature flue-gas from boiler recycling FGR butterfly valve control system |
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2019
- 2019-07-04 CN CN201921036336.8U patent/CN210566301U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296220A (en) * | 2019-07-04 | 2019-10-01 | 杨龙 | A kind of high temperature flue-gas from boiler recycling FGR butterfly valve control system |
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