CN219607146U - Unit operation safety guarantee device under degree of depth peak shaving - Google Patents
Unit operation safety guarantee device under degree of depth peak shaving Download PDFInfo
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- CN219607146U CN219607146U CN202320168804.7U CN202320168804U CN219607146U CN 219607146 U CN219607146 U CN 219607146U CN 202320168804 U CN202320168804 U CN 202320168804U CN 219607146 U CN219607146 U CN 219607146U
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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 relates to a unit operation safety guarantee device under deep peak shaving, which comprises: a main pipe, a blower, a bypass pipe and a recirculation fan; the inlet of the main pipeline is communicated with air, and the outlet of the main pipeline is communicated with unit equipment; the air feeder is communicated with the main path pipe, the inlet end and the outlet end of the bypass pipe are connected with the main path pipe in an on-off mode, and the air feeder is positioned between the inlet end and the outlet end; the recirculation fan is communicated with the bypass pipe and is started when the unit equipment runs under low load in the deep peak shaving process so as to increase the air supply quantity of the air feeder; the problem that the blower is influenced by the low-load running state of the unit equipment to cause stall is avoided, and particularly, when the electric load of the unit equipment is reduced to 20% or below, the blower in the low-load state cannot normally run is solved.
Description
Technical Field
The utility model relates to the technical field of deep peak shaving of units, in particular to a unit operation safety guarantee device under deep peak shaving.
Background
In order to ensure enough primary fluidization air quantity under deep peak shaving, the output of a secondary fan is liable to be greatly reduced, however, the fan stall is caused by the too small flow, the crisis equipment is safe to operate, the unit is not stopped when serious, and the safety and stable production of the unit are affected.
The common technology at present is to arrange a primary fan to increase a smoke recirculation system, and to replace a part of air with smoke, so as to ensure enough fluidization air quantity and increase the air quantity of a secondary fan; however, the air volume effect of the secondary air blower lifted by the system is not ideal; to cope with this problem, the prior art has also been improved correspondingly, for example: a circulating air duct is additionally arranged at the position of the secondary air machine; although the operation requirements of the unit are improved, the operation requirements of the unit still cannot be met, particularly when the electric load of the unit equipment is reduced to 20% or below, the secondary air blower in a low-load state needs a large amount of recirculation air quantity to maintain the normal operation of the secondary air blower, but at the moment, the recirculation of a large amount of secondary air is difficult to realize by simply relying on the inlet-outlet pressure difference of the recirculation air duct.
Disclosure of Invention
The utility model aims to overcome the defect that a circulating air duct cannot ensure the normal operation of a secondary air blower under low electric load in the prior art, thereby providing a unit operation safety guarantee device under deep peak shaving.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a unit operation safety guarantee device under degree of depth peak shaving, includes: a main pipe, a blower, a bypass pipe and a recirculation fan;
the inlet of the main pipeline is communicated with air, and the outlet of the main pipeline is communicated with unit equipment;
the air feeder is communicated with the main pipeline,
the inlet end and the outlet end of the bypass pipe are connected with the main pipe in an on-off mode, and the air feeder is positioned between the inlet end and the outlet end;
the recirculation fan is communicated with the bypass pipe and is started in the low-load operation process of the deep peak shaving process of the unit equipment so as to increase the air supply quantity of the air feeder.
Preferably, the valve assembly is also included,
the valve assembly includes an inlet shut-off gate and an outlet shut-off gate,
the inlet stop gate and the outlet stop gate are both communicated with the bypass pipe, the recirculation fan is positioned between the inlet stop gate and the outlet stop gate,
the inlet of the inlet stop door is communicated with the main pipeline, and the outlet of the inlet stop door is communicated with the inlet of the recirculating fan;
the inlet of the outlet stop door is communicated with the outlet of the recirculating fan, and the outlet of the outlet stop door is communicated with the main pipeline.
Preferably, the valve assembly further comprises a bypass regulator door,
and the bypass regulating door is communicated with a bypass pipe between the inlet stop door and the recirculation fan.
Preferably, the bypass pipe is further provided with a first air volume measuring device;
the first air quantity measuring device is located between the inlet stop door and the bypass adjusting door.
Preferably, the valve assembly further comprises an inlet adjustment door and an outlet adjustment door,
the inlet regulating door and the outlet regulating door are both communicated with the main pipeline,
and the inlet of the inlet regulating door is respectively communicated with the inlet and the outlet end of the main pipeline, the outlet of the inlet regulating door is communicated with the inlet of the blower,
the inlet of the outlet regulating door is communicated with the outlet of the air feeder, and the outlet of the outlet regulating door is respectively communicated with the inlet end and the unit equipment.
Preferably, the system further comprises a DCS system, and the valve assembly and the recirculation fan are in signal connection with the DCS system.
Preferably, the unit equipment comprises a boiler and an air preheater,
and the inlet of the air preheater is communicated with the outlet of the main pipeline, and the outlet of the air preheater is communicated with the boiler.
Preferably, the air quantity detecting device also comprises a second air quantity detecting device,
the second air quantity detection device is communicated with the main pipeline and is arranged close to the air preheater relative to the boiler.
Compared with the prior art, the utility model has the beneficial effects that:
according to the unit operation safety guarantee device under deep peak shaving provided by the technical scheme, the bypass pipe is communicated with the main pipeline, so that the recirculation fan is started in the unit equipment deep peak shaving process under low load operation based on the communication relation between the recirculation fan and the bypass pipe, the air quantity of the air feeder communicated with the main pipeline is increased through the circulating air quantity generated by the recirculation fan, the problem that the air feeder (namely the secondary fan) is stalled due to the influence of the unit equipment under low load operation state is avoided, and particularly, when the electric load of the unit equipment is reduced to 20% or below, the air feeder under the low load state cannot normally operate is solved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a unit operation safety guarantee device according to an embodiment of the present utility model.
Reference numerals illustrate:
1. an inlet adjustment door; 2. a blower; 3. an outlet adjustment door; 4. a second air volume measuring device; 5. an air preheater; 6. an inlet stop gate; 7. a first air volume measuring device; 8. a bypass adjustment door; 9. a recirculation fan; 10. an outlet stop gate; 11. a main pipe; 12. and a bypass tube.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the prior art, when the unit is in deep peak shaving, in order to ensure the output of the secondary air blower, a smoke recycling system is generally added, namely, part of air is replaced by smoke, so that the sufficient fluidization air quantity is ensured, and the air quantity of the secondary air blower is increased; however, in the implementation process, the air quantity effect of the secondary air blower lifted by the system is not ideal; corresponding modifications to this problem will be made by those skilled in the art, such as: a circulating air duct is additionally arranged at the position of the secondary air machine; although the design is improved, the operation requirement of the unit can not be met. Especially when the electric load of the unit equipment is reduced to 20% or below, the secondary air blower in a low-load state needs a large amount of recirculation air quantity to maintain the normal operation of the secondary air blower, but at the moment, a large amount of secondary air recirculation is difficult to realize by simply relying on the inlet and outlet pressure difference of the recirculation air duct; and then has great influence on the operation safety and stable production of the equipment.
Based on this, the embodiment of the utility model provides a unit operation safety guarantee device under deep peak shaving, as shown in fig. 1, including: a main duct 11, a blower 2, a bypass duct 12, and a recirculation fan 9; the inlet of the main pipeline 11 is communicated with air, the outlet of the main pipeline 11 is communicated with unit equipment, and air quantity is conveyed to the unit equipment through the main pipeline 11 so as to be used for running and producing the unit equipment; the blower 2 (namely, the secondary blower) is communicated with the main path pipe 11 and is used for adjusting the blowing amount by matching with the main path pipe 11; the inlet end and the outlet end of the bypass pipe 12 are connected with the main pipe 11 in an on-off mode, and are used for forming a circulating loop with the main pipe 11 when the unit carries out deep peak shaving; specifically, the blower 2 is communicated with the main pipe 11 and is positioned between an inlet end and an outlet end, the recirculation blower 9 is communicated with the bypass pipe 12 and is started in the process of deep peak shaving of the unit equipment in low-load operation, so that the air supply quantity of the blower 2 is increased through the circulating air quantity generated by the recirculation blower, and the operation safety of the blower 2 is ensured during the low-load operation of the unit; the problem of stall caused by the influence of the low-load running state of the unit equipment on the blower 2 is avoided, and particularly, when the electric load of the unit equipment is reduced to 20% or below, the blower 2 in the low-load state cannot normally run is avoided.
The unit can run in a low-load mode in the deep peak shaving process, and then the output of the blower 2 can be greatly reduced; when the electric load of the unit equipment is reduced to 20% or below, the recirculation fan 9 is started, the recirculation air quantity is generated by the recirculation fan 9, the recirculation air quantity generated by the recirculation fan 9 is conveyed to the main path pipe 11 from the outlet end of the bypass pipe 12 based on the positive and negative pressure flow direction of the main path pipe 11, and then flows through the blower 2 to increase the air quantity of the blower 2 through the recirculation air quantity, so that the normal operation of the blower 2 is ensured, and then flows back to the bypass pipe 12 again through the inlet end of the bypass pipe 12, so that circulation is formed.
Specifically, the unit operation safety guarantee device also comprises a valve component, and the valve component comprises an inlet stop door 6 and an outlet stop door 10; in order to ensure the air supply quantity of the unit equipment and facilitate the control of the circulation of the bypass pipe 12, the inlet stop door 6 and the outlet stop door 10 are both communicated on the bypass pipe 12, and the recirculation fan 9 is positioned between the inlet stop door 6 and the outlet stop door 10. More specifically, the inlet of the inlet shutoff gate 6 is communicated with the main path pipe 11, the outlet of the inlet shutoff gate 6 is communicated with the inlet of the recirculation fan 9, the inlet of the outlet shutoff gate 10 is communicated with the outlet of the recirculation fan 9, and the outlet of the outlet shutoff gate 10 is communicated with the main path pipe 11.
When the unit equipment does not carry out deep peak shaving and operates efficiently, the inlet stop door 6 and the outlet stop door 10 are both in a closed state; at this time, the bypass pipe 12 is not communicated with the main pipe 11; when the unit equipment carries out deep peak regulation and the electric load is reduced to 20% or below, the inlet stop gate 6 and the outlet stop gate 10 are both opened, the bypass pipe 12 is communicated with the main pipe 11, the recirculation fan 9 is started, and the recirculation air quantity is generated through the recirculation fan 9 so as to increase the air quantity of the air feeder 2, so that the normal operation of the air feeder 2 is ensured; preferably, the ingress shutoff gate 6 comprises an ingress gate insert and the egress gate 10 comprises an egress gate insert.
Further, in order to facilitate the regulation of the circulating air quantity in the bypass pipe 12, the valve assembly further comprises a bypass regulating door 8, and the bypass regulating door 8 is communicated with the bypass pipe 12 between the inlet stop door 6 and the recirculation fan 9; and when the inlet stop door 6 and the outlet stop door 10 are both opened, the bypass regulating door 8 can regulate the circulating air quantity flowing through the bypass pipe 12, so that the control of the circulating air quantity conveyed by the blower 2 can be realized, and the possibility that the blower 2 cannot normally operate or stop when the electric load of unit equipment is reduced to 20% or below is fundamentally avoided.
Preferably, in order to cooperate the bypass regulating door 8 to realize accurate regulation and control, still be provided with first air volume measuring device 7 on bypass pipe 12, and first air volume measuring device 7 is located between import stop door 6 and bypass regulating door 8, further, according to the actual air volume numerical value that first air volume measuring device 7 detected, can accurately acquire the circulation amount of wind size in the bypass pipe 12 of flowing through.
Specifically, the valve assembly further comprises an inlet regulating door 1 and an outlet regulating door 3, wherein the inlet regulating door 1 and the outlet regulating door 3 are both communicated on the main pipeline 11, the inlet of the inlet regulating door 1 is respectively communicated with the inlet of the main pipeline 11 and the outlet end of the bypass pipeline 12, the outlet of the inlet regulating door 1 is communicated with the inlet of the blower 2, the inlet of the outlet regulating door 3 is communicated with the outlet of the blower 2, and the outlet of the outlet regulating door 3 is respectively communicated with the inlet end of the bypass pipeline 12 and the unit equipment; the force of the blower 2 is regulated by the inlet regulating door 1 and the outlet regulating door 3.
In order to facilitate the regulation and control of the staff, the unit operation safety guarantee device also comprises a DCS system; specifically, recirculation fan 9 and valve subassembly all are connected with the DCS system signal, and the staff can realize the remote control to valve subassembly and recirculation fan 9 through the DCS system in the control room promptly, convenient operation and high-efficient swift.
Specifically, the unit equipment comprises a boiler and an air preheater 5, wherein an inlet of the air preheater 5 is communicated with an outlet of a main pipeline 11, and an outlet of the air preheater 5 is communicated with the boiler and is used for preheating air entering the boiler from the outside so as to reduce energy consumption.
Further, for the accurate amount of wind that gets into unit equipment of control, this unit operation safety guarantee device still is equipped with second air quantity measuring device 4, and second air quantity detecting device intercommunication is on main road pipe 11, and the boiler is close to air preheater 5 setting relatively, and inlet control door 1 and the export control door 3 that communicate on main road pipe 11 then can be according to the actual amount of wind numerical value that second air quantity detecting device detected and adjust valve opening size.
In addition, the first air volume measuring device 7 and the second air volume measuring device 4 are both in communication connection with the DCS system, and detected air volume data can be fed back in real time to serve as a reference basis for the regulation and control of staff.
The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.
Claims (8)
1. The utility model provides a unit operation safety guarantee device under degree of depth peak shaving which characterized in that includes: a main pipe, a blower, a bypass pipe and a recirculation fan;
the inlet of the main pipeline is communicated with air, and the outlet of the main pipeline is communicated with unit equipment;
the air feeder is communicated with the main pipeline,
the inlet end and the outlet end of the bypass pipe are connected with the main pipe in an on-off mode, and the air feeder is positioned between the inlet end and the outlet end;
the recirculation fan is communicated with the bypass pipe and is started in the low-load operation process of the deep peak shaving process of the unit equipment so as to increase the air supply quantity of the air feeder.
2. The deep peak shaver set operation safety device according to claim 1, further comprising a valve assembly,
the valve assembly includes an inlet shut-off gate and an outlet shut-off gate,
the inlet stop gate and the outlet stop gate are both communicated with the bypass pipe, the recirculation fan is positioned between the inlet stop gate and the outlet stop gate,
the inlet of the inlet stop door is communicated with the main pipeline, and the outlet of the inlet stop door is communicated with the inlet of the recirculating fan;
the inlet of the outlet stop door is communicated with the outlet of the recirculating fan, and the outlet of the outlet stop door is communicated with the main pipeline.
3. A deep peak shaver set-down safety device according to claim 2, wherein the valve assembly further comprises a bypass regulator door,
and the bypass regulating door is communicated with a bypass pipe between the inlet stop door and the recirculation fan.
4. The device for ensuring the operation safety of the deep peak shaver set according to claim 3, wherein the bypass pipe is further provided with a first air volume measuring device;
the first air quantity measuring device is located between the inlet stop door and the bypass adjusting door.
5. The deep peak shaver set operation safety device according to claim 2, wherein the valve assembly further comprises an inlet regulator door and an outlet regulator door,
the inlet regulating door and the outlet regulating door are both communicated with the main pipeline,
and the inlet of the inlet regulating door is respectively communicated with the inlet and the outlet end of the main pipeline, the outlet of the inlet regulating door is communicated with the inlet of the blower,
the inlet of the outlet regulating door is communicated with the outlet of the air feeder, and the outlet of the outlet regulating door is respectively communicated with the inlet end and the unit equipment.
6. The deep peak shaver set operation safety guarantee device according to claim 2, further comprising a DCS system, wherein the valve assembly and the recirculation fan are in signal connection with the DCS system.
7. The device for ensuring the operation safety of the deep peak shaver machine set according to claim 1, wherein the machine set equipment comprises a boiler and an air preheater,
and the inlet of the air preheater is communicated with the outlet of the main pipeline, and the outlet of the air preheater is communicated with the boiler.
8. The deep peak shaver set operation safety guarantee device according to claim 7, further comprising a second air quantity detection device,
the second air quantity detection device is communicated with the main pipeline and is arranged close to the air preheater relative to the boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320168804.7U CN219607146U (en) | 2023-01-17 | 2023-01-17 | Unit operation safety guarantee device under degree of depth peak shaving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320168804.7U CN219607146U (en) | 2023-01-17 | 2023-01-17 | Unit operation safety guarantee device under degree of depth peak shaving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219607146U true CN219607146U (en) | 2023-08-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320168804.7U Active CN219607146U (en) | 2023-01-17 | 2023-01-17 | Unit operation safety guarantee device under degree of depth peak shaving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219607146U (en) |
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2023
- 2023-01-17 CN CN202320168804.7U patent/CN219607146U/en active Active
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