CN220453650U - Circulating ash storage system suitable for deep peak shaving of circulating fluidized bed boiler - Google Patents
Circulating ash storage system suitable for deep peak shaving of circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN220453650U CN220453650U CN202322022014.0U CN202322022014U CN220453650U CN 220453650 U CN220453650 U CN 220453650U CN 202322022014 U CN202322022014 U CN 202322022014U CN 220453650 U CN220453650 U CN 220453650U
- Authority
- CN
- China
- Prior art keywords
- screening
- communicated
- inlet
- return
- circulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012216 screening Methods 0.000 claims abstract description 100
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000003546 flue gas Substances 0.000 claims abstract description 25
- 238000000926 separation method Methods 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 5
- 238000004513 sizing Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 4
- 239000002245 particle Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model relates to a circulating ash storage system suitable for deep peak shaving of a circulating fluidized bed boiler, which comprises the following components: the device comprises a hearth, separating equipment and a return leg, wherein the separating equipment comprises a flue gas inlet and a return valve, the hearth comprises a flue gas outlet and a return port, the flue gas outlet is communicated with the flue gas inlet, one end of the return leg is communicated with the return valve, and the other end of the return leg is communicated with the return port; the screening assembly comprises screening equipment and a screening pipe, one end of the screening pipe is communicated with the feed back valve, the other end of the screening pipe is communicated with the feed back leg, and the screening equipment is communicated with the screening pipe; the screening device is communicated with the screening pipe and used for screening off part of unqualified circulating ash entering the screening pipe, so that qualified circulating ash is prevented from being provided in the load lifting process of the boiler; further improving the quality of the circulating ash and the combustion stability of the boiler.
Description
Technical Field
The utility model relates to the technical field of boilers, in particular to a circulating ash storage system suitable for deep peak shaving of a circulating fluidized bed boiler.
Background
In recent years, in order to achieve the aims of carbon peak regulation and carbon neutralization, new energy installation such as wind power and solar energy is rapidly increased, the positioning of the coal-fired thermal power generating unit in an electric power system is changed from a basic power supply, a main power supply to a supporting and adjusting power supply, the circulating fluidized bed unit needs more participation in the deep peak regulation of a power grid, and the peak regulation response speed of the unit is also more demanding.
Under the deep peak regulation working condition, in order to reduce the convective heat transfer in the hearth, a circulating ash rapid storage technology is applied, and particularly, the discharge and the input of the circulating ash amount in the circulating fluidized bed boiler are controlled, so that the rapid lifting load is realized; however, the discharged circulating ash contains large particles which are not completely combusted by the coal entering the furnace, large particles which are agglomerated by high-temperature combustion in the furnace, a large amount of iron and other impurities, so that part of the circulating ash discharged under a low-load working condition is required to be screened and qualified and then is used as a circulating bed material, and the combustion stability of the circulating fluidized bed boiler is improved.
Disclosure of Invention
The utility model aims to overcome the defect that the circulating ash discharged by the boiler in the prior art contains impurities and cannot be directly used as circulating bed materials, thereby providing a circulating ash storage system suitable for deep peak shaving of the circulating fluidized bed boiler.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a circulating ash storage system adapted for deep peaking of a circulating fluidized bed boiler, comprising: a hearth, separating equipment and a feed back leg,
the separation equipment comprises a flue gas inlet and a return valve, the hearth comprises a flue gas outlet and a return port, the flue gas outlet is communicated with the flue gas inlet, one end of the return leg is communicated with the return valve, and the other end of the return leg is communicated with the return port;
still include the screening subassembly, the screening subassembly includes screening equipment and screening pipe, the one end of screening pipe with feed back valve intercommunication, the other end with feed back leg intercommunication, screening equipment intercommunication is in on the screening pipe.
Preferably, the screen mesh size of the screening apparatus is less than 8mm.
Preferably, the screen assembly further comprises an inlet regulator valve, which is in communication with the screen pipe, and which is located between the screening device and the return valve.
Preferably, the screen assembly includes a storage mechanism including a first cartridge and a second cartridge,
the screening device is provided with a screening inlet, a waste material port and a fine material port,
the inlet regulating valve is communicated with the screening inlet,
the inlet of the first storage bin is communicated with the waste port, and the outlet of the first storage bin is communicated with external equipment; the second storage bin is communicated with the screening pipe, an inlet of the second storage bin is communicated with the concentrate port, and an outlet of the second storage bin is communicated with the feed back leg.
Preferably, the screening assembly further comprises a conveying mechanism, the conveying mechanism comprises a primary conveying device, a secondary conveying device and a tertiary conveying device, the primary conveying device, the secondary conveying device and the tertiary conveying device are all communicated with the screening pipe, the primary conveying device is located between the inlet regulating valve and the screening device, the secondary conveying device is located between the screening device and the second storage bin, and the tertiary conveying device is located between the second storage bin and the return leg.
Preferably, the device further comprises an ash cooler which is communicated with the screening pipe and is positioned between the inlet regulating valve and the primary conveying equipment.
Compared with the prior art, the utility model has the beneficial effects that:
according to the circulating ash storage system suitable for deep peak regulation of the circulating fluidized bed boiler, one end of the screening pipe is communicated with the feed back valve of the separation equipment, and the other end of the screening pipe is communicated with the feed back leg, so that part of circulating ash separated from flue gas by the separation equipment enters the screening pipe, the deep peak regulation of the circulating fluidized bed boiler is completed, and the reduction of the convection heat exchange intensity in the boiler is realized; meanwhile, the screening equipment is communicated with the screening pipe and used for screening off part of unqualified circulating ash entering the screening pipe, so that qualified circulating ash can be provided in the load lifting process of the boiler, the quality of the circulating ash is further improved, and the combustion stability of the boiler is improved.
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 circulating ash storage system for deep peaking of a circulating fluidized bed boiler according to an embodiment of the present utility model.
Reference numerals illustrate:
1. a furnace; 2. a separation device; 3. a feed back valve; 4. a feed back leg; 5. an ash cooler; 51. an inlet regulating valve; 6. a first stage conveying device; 7. a screening device; 8. a first bin; 9. a secondary conveying device; 10. a second bin; 11. three-stage conveying equipment.
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.
The embodiment of the utility model provides a circulating ash storage system suitable for deep peak shaving of a circulating fluidized bed boiler, which is shown in fig. 1 and comprises the following components: a hearth 1, a separation device 2 and a return leg 4; wherein the hearth 1 is a three-dimensional space for fuel combustion, the separation equipment 2 is a gas-solid separation device for reducing dust in the discharged smoke of the hearth 1, and the separation equipment 2 comprises a cyclone separator; in particular, the separation device 2 has a flue gas inlet and a return valve 3, while the furnace 1 comprises a flue gas outlet and a return opening; the flue gas outlet of the hearth is communicated with the flue gas inlet of the separation equipment 2, one end of the return leg 4 is communicated with the return valve 3 of the separation equipment 2, and the other end of the return leg is communicated with the return port of the hearth 1; more specifically, the system further comprises a screening assembly comprising a screening device 7 and a screening pipe, wherein the screening device 7 is used for screening part of the circulating ash separated from the flue gas by the separation device 2, and the screening pipe is used for conveying the screened circulating ash.
Namely, the fuel in the hearth 1 is combusted, and flue gas with circulating ash is generated, then the flue gas with circulating ash is discharged from a flue gas outlet, enters the separation device 2 through a flue gas inlet, and is separated from solids in the separation device 2, and then the separated gas is discharged from the separation device 2 to a tail flue; solid particles (circulating ash) separated from the flue gas are discharged through a return valve 3, and a part of the solid particles enter a return leg 4 and enter the hearth 1 from a return port for re-combustion; the other part enters a screening pipe, and is screened by a screening device 7 communicated with the screening pipe so as to screen out part of unqualified circulating ash, and the screened qualified circulating ash is fed into the hearth 1 from a return port through a return leg 4 when the boiler needs to lift load.
One end of a screening pipe is communicated with a feed back valve 3 of the separation equipment 2, and the other end of the screening pipe is communicated with a feed back leg 4, so that part of circulating ash separated from the flue gas by the separation equipment 2 enters the screening pipe, and the convective heat exchange intensity in the boiler is reduced; meanwhile, the screening equipment 7 is communicated with the screening pipe and used for screening off part of unqualified circulating ash entering the screening pipe, so that qualified circulating ash can be provided in the load lifting process of the boiler, the quality of the circulating ash is further improved, and the combustion stability of the boiler is improved.
In particular, the screen mesh size of the screening device 7 selected in the present application is smaller than 8mm in order to better avoid the entrainment of impurities into the circulating ash in the furnace 1, i.e. the screening device 7 can only pass the circulating ash with a particle size smaller than 8mm.
Preferably, in order to facilitate controlling the depth peaking of the unit, the screening assembly further comprises an inlet regulating valve 51, the inlet regulating valve 51 is communicated with the screening pipe, and the inlet regulating valve 51 is positioned between the screening device 7 and the feed back valve 3; when the machine set carries out deep peak regulation, the circulating ash amount in the hearth 1 needs to be reduced so as to reduce the intensity of convection heat exchange in the furnace, thereby achieving the purpose of rapid peak regulation; that is, the inlet regulating valve 51 is opened so that solid particles (circulating ash) separated from the flue gas are discharged through the return valve 3, and a part of the solid particles enter the return leg 4 and enter the furnace 1 from the return port to be burned again; the other part enters a screening pipe through an inlet regulating valve 51, is screened through screening equipment 7 communicated with the screening pipe, so as to screen out part of unqualified circulating ash, and feeds the screened qualified circulating ash into the hearth 1 from a material returning port through a material returning leg 4 when the load of the boiler needs to be lifted; when the unit does not require deep peaking, then the inlet regulator valve 51 is closed.
Further, to facilitate storage of the recycled ash for screening, the screen assembly further includes a storage mechanism; specifically, the storage mechanism comprises a first storage bin 8 and a second storage bin 10, the screening device 7 is provided with a screening inlet, a waste material port and a concentrate port, wherein the inlet regulating valve 51 is communicated with the screening inlet so that the circulating ash separated in the separating device 2 enters the screening device 7, the inlet of the first storage bin 8 is communicated with the waste material port so as to store the circulating ash with the particle size larger than 8mm screened by the screening device 7, and the outlet of the first storage bin 8 is communicated with external equipment, such as material transfer equipment or material reprocessing equipment, and the like, so as to further process the circulating ash with the particle size larger than 8 mm; further, the second storage bin 10 is communicated with the screening pipe, and the inlet of the second storage bin 10 is communicated with the concentrate inlet, and the outlet of the second storage bin 10 is communicated with the feed back leg 4, so that qualified circulating ash screened by the screening device 7 is stored for taking when the boiler needs to lift load.
Namely, when the unit needs to raise load, the circulating ash amount in the hearth 1 needs to be increased; at this time, the inlet regulating valve 51 is closed, so that the circulating ash separated from the separating apparatus 2 is directly fed into the furnace 1 through the feed back valve 3 and the feed back leg 4, and at the same time, the circulating ash qualified for screening in the second storage bin 10 is also fed into the furnace 1 through the feed back leg 4.
Specifically, in order to facilitate the transportation of the circulating ash, the screening assembly further comprises a transportation mechanism, and the transportation mechanism comprises a first-stage transportation device 6, a second-stage transportation device 9 and a third-stage transportation device 11, wherein the first-stage transportation device 6, the second-stage transportation device 9 and the third-stage transportation device 11 are all communicated with the screening pipe, and the first-stage transportation device 6 is positioned between an inlet regulating valve 51 and a screening inlet of the screening device 7 and is used for sending the circulating ash separated by the separation device 2 into the screening device 7 for screening; the second-stage conveying device 9 is positioned between the concentrate outlet of the screening device 7 and the second storage bin 10 and is used for conveying qualified circulating ash screened by the screening device 7 into the second storage bin 10 for storage; a tertiary conveying device 11 is located between the second bin 10 and the return leg 4 for feeding the qualified circulating ash in the second bin 10 via the return leg 4 into the furnace 1 for re-combustion.
Preferably, in order to avoid damage to the screening device 7 caused by high-temperature circulating ash, the system further comprises an ash cooler 5, wherein the ash cooler 5 is communicated with the screening pipe, and the ash cooler 5 is positioned between the inlet regulating valve 51 and the primary conveying device 6; that is, the circulating ash separated in the separating apparatus 2 is discharged from the feed back valve 3; when the machine set needs deep peak regulation, part of circulating ash enters the screening pipe from the inlet regulating valve 51, is cooled by the ash cooler 5, and enters the screening equipment 7 for screening after cooling.
When the unit depth peak regulation is carried out, the circulating ash quantity of the hearth 1 needs to be reduced so as to reduce the intensity of convection heat exchange in the furnace and achieve the purpose of rapid peak regulation. Opening an inlet regulating valve 51, opening a first-stage conveying device 6, opening a second-stage conveying device 9 and opening a screening device 7, enabling part of circulating ash separated from the separating device 2 to enter the ash cooler 5 from the feed back valve 3 through the inlet regulating valve 51, enabling the circulating ash to enter the first-stage conveying device 6 after heat exchange and cooling of the ash cooler 5, conveying the circulating ash to the screening device 7 for screening through the conveying device, conveying the screened unqualified circulating ash to the first storage bin 8, and carrying out comprehensive utilization after outward transportation. The qualified circulating ash after screening is conveyed to a second storage bin 10 for storage through a second-stage conveying device 9 to be used when the load is lifted by a standby group; when the unit is in load lifting, the circulating ash amount of the hearth 1 needs to be increased, the inlet regulating valve 51 is closed, the three-stage conveying equipment 11 is opened, and the circulating ash stored in the second storage bin 10 is conveyed to the feed back leg 4 and then enters the hearth 1.
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 (6)
1. A circulating ash storage system adapted for deep peaking of a circulating fluidized bed boiler, comprising: a hearth, separating equipment and a feed back leg,
the separation equipment comprises a flue gas inlet and a return valve, the hearth comprises a flue gas outlet and a return port, the flue gas outlet is communicated with the flue gas inlet, one end of the return leg is communicated with the return valve, and the other end of the return leg is communicated with the return port;
still include the screening subassembly, the screening subassembly includes screening equipment and screening pipe, the one end of screening pipe with feed back valve intercommunication, the other end with feed back leg intercommunication, screening equipment intercommunication is in on the screening pipe.
2. A storage system according to claim 1, wherein the screen aperture of the screening apparatus is less than 8mm.
3. The storage system of claim 1, wherein the screen assembly further comprises an inlet regulator valve in communication with the screen tube, and wherein the inlet regulator valve is located between the screening apparatus and the return valve.
4. The storage system of claim 3, wherein the screen assembly includes a storage mechanism including a first storage bin and a second storage bin,
the screening device is provided with a screening inlet, a waste material port and a fine material port,
the inlet regulating valve is communicated with the screening inlet,
the inlet of the first storage bin is communicated with the waste port, and the outlet of the first storage bin is communicated with external equipment; the second storage bin is communicated with the screening pipe, an inlet of the second storage bin is communicated with the concentrate port, and an outlet of the second storage bin is communicated with the feed back leg.
5. The storage system of claim 4, wherein the screen assembly further comprises a conveyor mechanism comprising a primary conveyor, a secondary conveyor, and a tertiary conveyor, wherein the primary conveyor, the secondary conveyor, and the tertiary conveyor are all in communication with the screen pipe, and wherein the primary conveyor is positioned between the inlet regulator valve and the screen, the secondary conveyor is positioned between the screen and the second bin, and the tertiary conveyor is positioned between the second bin and the return leg.
6. The storage system of claim 5, further comprising an ash cooler in communication with the sizing tube, the ash cooler being located between the inlet regulator valve and the primary conveying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322022014.0U CN220453650U (en) | 2023-07-28 | 2023-07-28 | Circulating ash storage system suitable for deep peak shaving of circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322022014.0U CN220453650U (en) | 2023-07-28 | 2023-07-28 | Circulating ash storage system suitable for deep peak shaving of circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220453650U true CN220453650U (en) | 2024-02-06 |
Family
ID=89725163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322022014.0U Active CN220453650U (en) | 2023-07-28 | 2023-07-28 | Circulating ash storage system suitable for deep peak shaving of circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220453650U (en) |
-
2023
- 2023-07-28 CN CN202322022014.0U patent/CN220453650U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111023106A (en) | Coal-fired coupling waste incineration system | |
| CN110822412A (en) | Low NO of pi-shaped boiler under low loadXModerate temperature flue gas recirculation system and method | |
| CN110822418A (en) | Low NO of pi-shaped boiler under low loadXLow temperature flue gas recirculation system and method | |
| CN220453650U (en) | Circulating ash storage system suitable for deep peak shaving of circulating fluidized bed boiler | |
| CN206269118U (en) | Biological particles combustion apparatus | |
| CN104197362A (en) | Fume-dried closed pulverization coal-fired boiler unit with function of exhaust water recovery | |
| CN201137945Y (en) | Divided garbage furnace of high and low temperature overheater | |
| CN108395910B (en) | High-efficient fluidized bed biomass gasification stove | |
| CN201754021U (en) | Special pulverized coal combustion system for drying coal slime and brown coal | |
| CN112325282A (en) | Circulating fluidized bed flue gas and fly ash combined circulating system and control method | |
| CN114046497A (en) | Circulating fluidized bed boiler capable of reducing NOX discharge amount | |
| CN213237493U (en) | Fly ash circulating device and circulating fluidized bed boiler comprising same | |
| CN213840890U (en) | Numerical control energy-saving environment-friendly multifunctional heating furnace | |
| CN115183251A (en) | Low-concentration coal mine gas heat storage oxidation steam production device and operation method | |
| CN115451399A (en) | Circulating fluidized bed boiler with process heat storage function and variable load adjusting method thereof | |
| CN115342373A (en) | Flexible mixed pulverized coal supply system based on coal flow coal quality on-line monitoring | |
| CN211463447U (en) | Safe and stable blast furnace coal injection and pulverization system | |
| CN114234179B (en) | Graded screening and recycling device for slag of circulating fluidized bed boiler | |
| CN204063016U (en) | A kind of electrostatic field takes off the fluidized system that sodium prevents boiler heating surface from staiing | |
| CN108644763B (en) | Circulating fluidized bed boiler and operation method thereof | |
| CN218324982U (en) | Thermal power plant stability control system | |
| CN212618248U (en) | Coal fired boiler of power plant surely fires system | |
| CN221724319U (en) | Circulating fluidized bed boiler with adjustable carbon stock | |
| CN214223084U (en) | Circulating fluidized bed boiler capable of quickly adjusting circulating ash amount | |
| CN210740379U (en) | High-temperature flue gas circulation equipment suitable for deep peak shaving of circulating fluidized bed system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |