CN211812318U - Coal-fired power plant fly ash combination formula air conveying system - Google Patents
Coal-fired power plant fly ash combination formula air conveying system Download PDFInfo
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- CN211812318U CN211812318U CN201922184107.7U CN201922184107U CN211812318U CN 211812318 U CN211812318 U CN 211812318U CN 201922184107 U CN201922184107 U CN 201922184107U CN 211812318 U CN211812318 U CN 211812318U
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- 239000010881 fly ash Substances 0.000 title claims abstract description 61
- 239000002956 ash Substances 0.000 claims abstract description 209
- 238000012546 transfer Methods 0.000 claims abstract description 141
- 239000000428 dust Substances 0.000 claims abstract description 95
- 238000003860 storage Methods 0.000 claims description 10
- 239000010883 coal ash Substances 0.000 claims description 5
- 238000002309 gasification Methods 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 4
- 238000000746 purification Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 9
- 239000003245 coal Substances 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 19
- 238000007599 discharging Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 4
- 235000011941 Tilia x europaea Nutrition 0.000 description 4
- 239000004571 lime Substances 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a coal fired power plant fly ash combination formula pneumatic conveying system, including pneumatic dust collecting sending system, transfer system, terminal unloading system and powder ash shipment system, pneumatic dust collecting sending system is through first conveyer pipe and second conveyer pipe and transfer system connection, and transfer system is through third conveyer pipe, fourth conveyer pipe and fifth conveyer pipe and powder ash shipment headtotail, forms the scattered passageway of air current between first sleeve pipe and the second sleeve pipe, is provided with a plurality of scattered wind holes along the axial setting on the second sleeve pipe. The utility model discloses this kind of coal fired power plant fly ash combination formula pneumatic conveying system utilizes each conveyer pipe that has the air current to scatter, and the conveying system who makes up into difficult stifled ash, maintenance cost low with pneumatic dust collecting sending system, terminal unloading system and powder ash shipment.
Description
Technical Field
The utility model relates to a coal fired power plant fly ash combination formula air conveying system belongs to material transport technical field.
Background
With the improvement of economic level, the development of industrial technology is faster and faster, the pneumatic conveying plays an important role in industrial growth, and the pneumatic conveying utilizes the capacity of air flow to convey granular materials in an air flow direction in a closed pipeline, which is a specific application of fluidization technology. Along with the continuous improvement of production scale, the requirement on conveying distance is higher and higher, but along with the increase of pipeline, difference in height's increase, the conveying degree of difficulty also gets bigger and bigger more and more, exceeds certain length, often can appear long grey bolt in the material conveying pipeline, causes the pipeline to block up.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coal fired power plant fly ash combination formula pneumatic conveying system, through adopting each conveyer pipe that can cut off long ash bolt, solve the problem of conveyer pipe jam.
In order to solve the technical problem, the utility model discloses a following technical scheme: a coal-fired power plant fly ash combined type pneumatic conveying system comprises a pneumatic dust collecting sending system, a transfer system, a terminal ash unloading system and a fly ash shipping system, wherein the pneumatic dust collecting sending system is connected with the transfer system through a first conveying pipe and a second conveying pipe; still include sixth conveyer pipe, seventh conveyer pipe and eighth conveyer pipe, the one end and the third duct connection of sixth conveyer pipe, the other end with the terminal unloads grey headtotail, the one end and the fourth duct connection of seventh conveyer pipe, the other end with the terminal unloads grey headtotail, the one end and the fifth duct connection of eighth conveyer pipe, the other end with the terminal unloads grey headtotail, first conveyer pipe, second conveyer pipe, third conveyer pipe, fourth conveyer pipe, fifth conveyer pipe, sixth conveyer pipe, seventh conveyer pipe, eighth conveyer pipe include first sleeve pipe and second sleeve pipe, and the sheathed tube diameter of second is less than first sleeve pipe, forms the scattered passageway of air current between first sleeve pipe and the second sleeve pipe, is provided with a plurality of scattered wind holes that set up along the axial on the second sleeve pipe.
In the coal-fired power plant fly ash combined pneumatic conveying system, the pneumatic dust collecting and sending system comprises a first group of dust collecting and sending devices, a second group of dust collecting and sending devices, a third group of dust collecting and sending devices and a fourth group of dust collecting and sending devices, the first group of dust collecting and sending devices and the second group of dust collecting and sending devices are connected with the transfer system through first conveying pipes, and the third group of dust collecting and sending devices and the fourth group of dust collecting and sending devices are connected with the transfer system through second conveying pipes.
In the coal-fired power plant fly ash combined pneumatic conveying system, the first group of dust collecting and sending device, the second group of dust collecting and sending device, the third group of dust collecting and sending device and the fourth group of dust collecting and sending device respectively comprise an electrostatic dust collector and a plurality of pneumatic ash removing pumps arranged below the electrostatic dust collector, a pneumatic air pipeline, a compressed air pipeline for conveying and a compressed air storage tank, the plurality of pneumatic ash removing pumps are connected in series through an ash conveying pipe, the pneumatic ash removing pumps are communicated with an ash hopper of the electrostatic dust collector, the ash hopper is connected with the pneumatic air pipeline, the ash conveying pipe is connected with the compressed air pipeline for conveying, and the compressed air pipeline for conveying is connected with the compressed air storage tank.
In the coal-fired power plant fly ash combined pneumatic conveying system, the transfer system comprises a fine ash transfer warehouse, a first coarse ash transfer warehouse, a second coarse ash transfer warehouse and a fine ash transfer warehouse, the bottom of first thick grey transfer warehouse and the bottom of second thick grey transfer warehouse all are provided with dry ash bulk machine, the bottom of thin grey transfer warehouse is provided with 1 transfer ash pump, the bottom of first thick grey transfer warehouse and second thick grey transfer warehouse is provided with 2 transfer ash pumps, the transfer ash pump and the third conveyer pipe intercommunication of setting in thin grey transfer warehouse bottom, set up a transfer ash pump and the third conveyer pipe intercommunication in first thick grey transfer warehouse bottom, set up another transfer ash pump and the fourth conveyer pipe intercommunication in first thick grey transfer warehouse bottom, set up a transfer ash pump and the fourth conveyer pipe intercommunication in second thick grey transfer warehouse bottom, set up another transfer ash pump and the fifth conveyer pipe intercommunication in second thick grey transfer warehouse bottom.
In the coal-fired power plant fly ash combined pneumatic conveying system, the terminal ash discharging system comprises a terminal fine ash warehouse, a first terminal coarse ash warehouse and a second terminal coarse ash warehouse, the terminal fine ash warehouse is communicated with a sixth conveying pipe, the first terminal coarse ash warehouse is communicated with the sixth conveying pipe, a seventh conveying pipe and/or an eighth conveying pipe, and the second terminal coarse ash warehouse is communicated with the eighth conveying pipe and/or the seventh conveying pipe.
In the coal-fired power plant fly ash combined pneumatic conveying system, the fly ash shipment system comprises a buffer tank and a spiral ash loader, the spiral ash loader is connected with the buffer tank, and the terminals of a third conveying pipe, a fourth conveying pipe and a fifth conveying pipe are connected with the buffer tank.
In the coal-fired power plant fly ash combined pneumatic conveying system, the first conveying pipe and the second conveying pipe are both provided with the first reservoir top switching valve.
In the coal-fired power plant coal ash combined pneumatic conveying system, the ash conveying pipe is provided with the pipeline switching valve.
In the coal-fired power plant fly ash combined pneumatic conveying system, the sixth conveying pipe, the seventh conveying pipe and the eighth conveying pipe are all provided with second reservoir top switching valves.
The operation method of the coal-fired power plant fly ash combined pneumatic conveying system comprises the following steps: step S01; checking whether the starting interlocking condition of the pneumatic dust collection sending system meets a set value; step S02: when the detected start interlocking condition of the pneumatic dust collection sending system meets a set value, a material conveying cycle is operated once; the operation of the primary material conveying cycle comprises the following operation steps: step S021: selecting a group of dust collecting and sending devices as a material conveying unit; opening a switching valve of a conveying pipe corresponding to a dust collecting and sending device serving as a material conveying unit; closing a switching valve on a conveying pipe corresponding to the unselected dust collecting sending device; step S02: opening a feed inlet of a pneumatic ash removal pump on a material conveying line; opening an exhaust valve of an ash conveying pump on a material conveying line; starting a material filling delay timer; starting a cycle monitoring timer; starting a minimum cycle timer; and/or a maximum cycle period timer; step S03: and detecting a high material level meter in the ash conveying pump on the material conveying line in real time, and starting an overfilling timer of the pneumatic ash removal pump when the high material level piece is detected to be covered. Step S04: closing a feed inlet of an ash conveying pump on the material conveying line; closing an exhaust valve of an ash conveying pump on the material conveying line; in the process of closing the feeding hole and the exhaust valve, if the material filling delay timer arrives, delaying for 0.1S, and closing the feeding hole and the exhaust valve of the ash conveying pump on the material conveying line; step S05: starting a conveying air valve to delay and start a timer; step S06: starting a conveying air valve; starting an air compensating valve of a conveying pipe on a conveying line; a safe delivery timer is started. Step S07: detecting the pressure in a conveying pipe on a material conveying line; if the pressure in the conveying pipe on the material conveying line is less than 0.3Barg and the safety conveying timer is up, starting the delayed conveying timer for 20 seconds, sending a conveying completion signal when the delayed conveying timer is up, and closing the conveying air valve and the air supplementing valve of the conveying pipe on the conveying line; starting a cycle reset timer; step S08: when the circulating reset timer is up, the operation of one-time material conveying circulation is completed. Wherein, the start interlocking condition of the pneumatic dust collecting sending system comprises: checking whether a start/stop/purge switch on the main electronic control screen is placed in a "start" or "purge" position; checking whether a manual/program control button on the local pneumatic control box is arranged at a program control position; checking whether the pressure of the conveying gas supply is more than 5.5 Barg; checking whether the main pump inlet and exhaust valve are closed and sealed; checking whether the inlet and exhaust valves of all the secondary pumps are closed and sealed; checking whether a minimum cycle timer is turned off or a level bypass button is pressed; checking whether the conveying pipeline is available; checking whether space is available for the delivery target transfer depot and/or the target gray depot and/or the target terminal depot and/or the target buffer tank.
Compared with the prior art, the coal-fired power plant coal ash combined type pneumatic conveying system utilizes each conveying pipe with air flow dispersion to combine the pneumatic dust collecting and sending system, the terminal ash discharging system and the ash loading ship into a conveying system which is not easy to block ash and has low maintenance cost; utilize the utility model discloses coal fired power plant fly ash combination formula pneumatic conveying system only needs can carry fly ash to the fly ash shipment system and the terminal system of unloading of far away (more than 2000 meters) through the mode of switching pipeline, directly carries out the water transportation to fly ash through the fly ash shipment system, unloads grey system through the terminal and carries out hierarchical storage with fly ash, can realize the multi-channel comprehensive utilization of dry ash.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the description of the invention
The examples are used together to explain the invention and do not constitute an undue limitation on the invention. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic view of the structure of the intercepting pipe section of the conveying pipe of the present invention.
Reference numerals: 1-a pneumatic dust collection sending system, 2-a transfer system, 201-a fine ash transfer warehouse, 202-a first coarse ash transfer warehouse, 203-a second coarse ash transfer warehouse, 204-a transfer ash conveying pump, 3-a terminal ash unloading system, 301-a terminal fine ash warehouse, 302-a first terminal coarse ash warehouse, 303-a second terminal coarse ash warehouse, 4-a powder ash ship loading system, 401-a buffer tank, 402-a spiral ash loader, 5-a first conveying pipe, 6-a second conveying pipe, 7-a third conveying pipe, 8-a fourth conveying pipe, 9-a fifth conveying pipe, 10-a sixth conveying pipe, 11-a seventh conveying pipe, 12-an eighth conveying pipe, 13-a first sleeve, 14-a second sleeve, 15-an air flow dispersing channel and 16-an air dispersing hole, 17-a first group of dust collection sending devices, 18-a second group of dust collection sending devices, 19-a third group of dust collection sending devices, 20-a fourth group of dust collection sending devices, 21-an ash bucket, 22-a gasified air pipeline, 23-a compressed air pipeline for conveying, 24-a compressed air storage tank, 25-a first warehouse top switching valve, 26-a pipeline switching valve, 27-a second warehouse top switching valve, 28-an ash conveying pipe and 29-an air-powered ash removal pump.
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Detailed Description
In order to make the technical solution of the present invention better understood, the following description is given with reference to the accompanying drawings in the embodiments of the present invention, and the technical solution in the embodiments of the present invention is clearly and completely described. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Embodiment 1 of the utility model: a coal-fired power plant fly ash combined type pneumatic conveying system comprises a pneumatic dust collecting sending system 1, a transfer system 2, a terminal ash unloading system 3 and a fly ash shipping system 4, wherein the pneumatic dust collecting sending system 1 is connected with the transfer system 2 through a first conveying pipe 5 and a second conveying pipe 6, and the transfer system 2 is connected with the fly ash shipping system 4 through a third conveying pipe 7, a fourth conveying pipe 8 and a fifth conveying pipe 9; the ash discharging device also comprises a sixth conveying pipe 10, a seventh conveying pipe 11 and an eighth conveying pipe 12, wherein one end of the sixth conveying pipe 10 is connected with the third conveying pipe 8, the other end of the sixth conveying pipe is connected with the terminal ash discharging system 3, one end of the seventh conveying pipe 11 is connected with the fourth conveying pipe 9, the other end of the seventh conveying pipe is connected with the terminal ash discharging system 3, one end and the fifth conveyer pipe 9 of eighth conveyer pipe 12 are connected, the other end with terminal ash unloading system 3 is connected, first conveyer pipe 5, second conveyer pipe 6, third conveyer pipe 7, fourth conveyer pipe 8, fifth conveyer pipe 9, sixth conveyer pipe 10, seventh conveyer pipe 11, eighth conveyer pipe 12 includes first sleeve 13 and second sleeve 14, second sleeve 14's diameter is less than first sleeve 13, form the scattered passageway 15 of air current between first sleeve 13 and the second sleeve 14, be provided with a plurality of scattered wind holes 16 along the axial setting on the second sleeve 14.
The utility model discloses embodiment 2: a coal-fired power plant fly ash combined type pneumatic conveying system comprises a pneumatic dust collecting sending system 1, a transfer system 2, a terminal ash unloading system 3 and a fly ash shipping system 4, wherein the pneumatic dust collecting sending system 1 is connected with the transfer system 2 through a first conveying pipe 5 and a second conveying pipe 6, and the transfer system 2 is connected with the fly ash shipping system 4 through a third conveying pipe 7, a fourth conveying pipe 8 and a fifth conveying pipe 9; the ash discharging device also comprises a sixth conveying pipe 10, a seventh conveying pipe 11 and an eighth conveying pipe 12, wherein one end of the sixth conveying pipe 10 is connected with the third conveying pipe 8, the other end of the sixth conveying pipe is connected with the terminal ash discharging system 3, one end of the seventh conveying pipe 11 is connected with the fourth conveying pipe 9, the other end of the seventh conveying pipe is connected with the terminal ash discharging system 3, one end and the fifth conveyer pipe 9 of eighth conveyer pipe 12 are connected, the other end with terminal ash unloading system 3 is connected, first conveyer pipe 5, second conveyer pipe 6, third conveyer pipe 7, fourth conveyer pipe 8, fifth conveyer pipe 9, sixth conveyer pipe 10, seventh conveyer pipe 11, eighth conveyer pipe 12 includes first sleeve 13 and second sleeve 14, second sleeve 14's diameter is less than first sleeve 13, form the scattered passageway 15 of air current between first sleeve 13 and the second sleeve 14, be provided with a plurality of scattered wind holes 16 along the axial setting on the second sleeve 14.
Specifically, the pneumatic dust collecting sending system 1 comprises a first group of dust collecting sending devices 17, a second group of dust collecting sending devices 18, a third group of dust collecting sending devices 19 and a fourth group of dust collecting sending devices 20, the first group of dust collecting sending devices 17 and the second group of dust collecting sending devices 18 are connected with the transit system 2 through a first conveying pipe 5, and the third group of dust collecting sending devices 19 and the fourth group of dust collecting sending devices 20 are connected with the transit system 2 through a second conveying pipe 6.
Further, the first group of dust collection sending device 17, the second group of dust collection sending device 18, the third group of dust collection sending device 19 and the fourth group of dust collection sending device 20 each include an electrostatic dust collector (not shown in the figure) and a plurality of pneumatic dust removing pumps 29, a pneumatic air pipeline 22, a compressed air pipeline 23 for conveying and a compressed air storage tank 24 which are arranged below the electrostatic dust collector, the plurality of pneumatic dust removing pumps 29 are connected in series through dust conveying pipes 28, the pneumatic dust removing pumps 29 are communicated with an ash bucket 21 of the electrostatic dust collector, the ash bucket 21 is connected with the pneumatic air pipeline 22, the ash conveying pipes 28 are connected with the compressed air pipeline 23 for conveying, and the compressed air pipeline 23 for conveying is connected with the compressed air storage tank 24.
Specifically, the transfer system 2 includes a fine ash transfer bank 201, a first coarse ash transfer bank 202, a second coarse ash transfer bank 203, a fine ash transfer bank 201, the bottom of the first coarse ash transfer warehouse 202 and the bottom of the second coarse ash transfer warehouse 203 are both provided with a dry ash bulk loader 205, the bottom of the fine ash transfer warehouse 201 is provided with 1 intermediate ash transfer pump 204, the bottom of the first coarse ash transfer warehouse 202 and the bottom of the second coarse ash transfer warehouse 203 are provided with 2 intermediate ash transfer pumps 204, the intermediate ash transfer pump arranged at the bottom of the fine ash transfer warehouse 201 is communicated with a third conveying pipe 7, one intermediate ash transfer pump arranged at the bottom of the first coarse ash transfer warehouse 202 is communicated with the third conveying pipe 7, the other intermediate ash transfer pump arranged at the bottom of the first coarse ash transfer warehouse 202 is communicated with a fourth conveying pipe 8, one intermediate ash transfer pump arranged at the bottom of the second coarse ash transfer warehouse 203 is communicated with the fourth conveying pipe 8, and the other intermediate ash transfer pump arranged at the bottom of the second coarse ash transfer warehouse 203 is communicated with a fifth conveying pipe 9.
The utility model discloses embodiment 3: a coal-fired power plant fly ash combined type pneumatic conveying system comprises a pneumatic dust collecting sending system 1, a transfer system 2, a terminal ash unloading system 3 and a fly ash shipping system 4, wherein the pneumatic dust collecting sending system 1 is connected with the transfer system 2 through a first conveying pipe 5 and a second conveying pipe 6, and the transfer system 2 is connected with the fly ash shipping system 4 through a third conveying pipe 7, a fourth conveying pipe 8 and a fifth conveying pipe 9; the ash discharging device comprises a sixth conveying pipe 10, a seventh conveying pipe 11 and an eighth conveying pipe 12, wherein one end of the sixth conveying pipe 10 is connected with a third conveying pipe 8, the other end of the sixth conveying pipe 10 is connected with a terminal ash discharging system 3, one end of the seventh conveying pipe 11 is connected with a fourth conveying pipe 9, the other end of the seventh conveying pipe 11 is connected with the terminal ash discharging system 3, one end of the eighth conveying pipe 12 is connected with a fifth conveying pipe 9, the other end of the eighth conveying pipe 12 is connected with the terminal ash discharging system 3, the first conveying pipe 5, the second conveying pipe 6, the third conveying pipe 7, the fourth conveying pipe 8, the fifth conveying pipe 9, the sixth conveying pipe 10, the seventh conveying pipe 11 and the eighth conveying pipe 12 comprise a first sleeve 13 and a second sleeve 14, the diameter of the second sleeve 14 is smaller than that of the first sleeve 13, and an air flow dispersing channel 15 is formed between the first sleeve 13 and the second sleeve 14 by the double-sleeve type formed by the first sleeve 13 and the second sleeve 14, the second sleeve 14 is provided with a plurality of air-dispersing holes 16 arranged in the axial direction.
Specifically, the pneumatic dust collecting sending system 1 comprises a first group of dust collecting sending devices 17, a second group of dust collecting sending devices 18, a third group of dust collecting sending devices 19 and a fourth group of dust collecting sending devices 20, the first group of dust collecting sending devices 17 and the second group of dust collecting sending devices 18 are connected with the transit system 2 through a first conveying pipe 5, and the third group of dust collecting sending devices 19 and the fourth group of dust collecting sending devices 20 are connected with the transit system 2 through a second conveying pipe 6.
Further, the first group of dust collection sending device 17, the second group of dust collection sending device 18, the third group of dust collection sending device 19 and the fourth group of dust collection sending device 20 respectively comprise an electrostatic dust collector, a plurality of pneumatic ash removal pumps 29 arranged below the electrostatic dust collector, a gasification air pipeline 22, a compressed air pipeline 23 for conveying and a compressed air storage tank 24, the pneumatic ash removal pumps 29 are connected in series through an ash conveying pipe 28, the pneumatic ash removal pumps 29 are communicated with an ash bucket 21 of the electrostatic dust collector, the ash bucket 21 is connected with the gasification air pipeline 22, the ash conveying pipe 28 is connected with the compressed air pipeline 23 for conveying, and the compressed air pipeline 23 for conveying is connected with the compressed air storage tank 24.
Specifically, the transfer system 2 includes a fine ash transfer bank 201, a first coarse ash transfer bank 202, a second coarse ash transfer bank 203, a fine ash transfer bank 201, the bottom of the first coarse ash transfer warehouse 202 and the bottom of the second coarse ash transfer warehouse 203 are both provided with a dry ash bulk loader 205, the bottom of the fine ash transfer warehouse 201 is provided with 1 intermediate ash transfer pump 204, the bottom of the first coarse ash transfer warehouse 202 and the bottom of the second coarse ash transfer warehouse 203 are provided with 2 intermediate ash transfer pumps 204, the intermediate ash transfer pump arranged at the bottom of the fine ash transfer warehouse 201 is communicated with a third conveying pipe 7, one intermediate ash transfer pump arranged at the bottom of the first coarse ash transfer warehouse 202 is communicated with the third conveying pipe 7, the other intermediate ash transfer pump arranged at the bottom of the first coarse ash transfer warehouse 202 is communicated with a fourth conveying pipe 8, one intermediate ash transfer pump arranged at the bottom of the second coarse ash transfer warehouse 203 is communicated with the fourth conveying pipe 8, and the other intermediate ash transfer pump arranged at the bottom of the second coarse ash transfer warehouse 203 is communicated with a fifth conveying pipe 9.
Specifically, the terminal ash discharging system 3 includes a terminal fine ash warehouse 303, a first terminal coarse ash warehouse 302 and a second terminal coarse ash warehouse 301, the terminal fine ash warehouse 303 is communicated with a sixth conveying pipe 10, the first terminal coarse ash warehouse 302 is communicated with the sixth conveying pipe 10, a seventh conveying pipe 11 and/or an eighth conveying pipe 12, and the second terminal coarse ash warehouse 301 is communicated with the eighth conveying pipe 12 and/or the seventh conveying pipe 11.
Specifically, the powder ash shipment system 4 comprises a buffer tank 401 and a spiral ash loader 402, wherein the spiral ash loader 402 is connected with the buffer tank 401, and the terminal ends of the third conveying pipe 7, the fourth conveying pipe 8 and the fifth conveying pipe 9 are connected with the buffer tank 401.
Further, a first warehouse top switching valve 25 is arranged on each of the first conveying pipe 5 and the second conveying pipe 6; the ash conveying pipe 28 is provided with a pipeline switching valve 26. And second reservoir top switching valves 27 are arranged on the sixth conveying pipe 10, the seventh conveying pipe 11 and the eighth conveying pipe 12.
The utility model discloses the theory of operation of system:
the pneumatic dust collection sending system 1 is conveyed to the fine ash transfer warehouse 201, the first coarse ash transfer warehouse 202 or the second coarse ash transfer warehouse 203 of the transfer system 2 through the pneumatic ash removing pump 29 arranged below the ash bucket 21 through the ash conveying pipe 28, the fly ash is transferred out of the transfer system 2 through the intermediate ash conveying pump 204, the fly ash in each intermediate transfer warehouse is conveyed to the corresponding conveying pipe by the intermediate ash conveying pump 204 arranged at the bottom of each intermediate transfer warehouse, and the fly ash in the transfer system can be directly conveyed out in a tank truck conveying mode by the dry ash bulk loader arranged at the bottom of each intermediate transfer warehouse. The fly ash in the transfer system 2 is conveyed to a wharf through a third conveying pipe 7, a fourth conveying pipe 8 and a fifth conveying pipe 9 (the length can exceed 2000 meters) which are not easy to block, is transported out through the fly ash loading system 4, and can also be conveyed to a terminal ash discharging system 3 in a power plant through a sixth conveying pipe 10 and a seventh conveying pipe 11 to be stored in a grading way so as to be reused.
The fly ash in the fine powder transfer warehouse 201 is blown into the third conveying pipe 7 by the transfer ash pump 204 arranged at the bottom of the fine powder transfer warehouse 201, the fly ash in the fine powder transfer warehouse 201 is conveyed for a long distance (more than 2000 meters) by the third conveying pipe 7 and the sixth conveying pipe 10, so that the fly ash in the fine powder transfer warehouse 201 is conveyed into the buffer tank 401 of the fly ash loading system 4, and the fly ash is loaded on the ash ship parked at the wharf by the spiral ash loader 402 connected with the buffer tank 401.
The fly ash in the first coarse ash transfer warehouse 202 is blown into the third conveying pipe 7 or the fourth conveying pipe 8 by a transfer ash conveying pump 204 arranged at the bottom of the first coarse ash transfer warehouse 202, and the fly ash in the first coarse ash transfer warehouse 202 is conveyed for a long distance (greater than 2000 meters) by the third conveying pipe 7 or the fourth conveying pipe 8, so that the fly ash in the first coarse ash transfer warehouse 202 can be conveyed to the fly ash loading system 4, and the fly ash in the first coarse ash transfer warehouse 202 can be conveyed to the terminal ash unloading system 3 arranged in the power plant.
The fly ash in the second coarse ash transfer warehouse 203 is pumped into the third ash conveying pipe 14 through a transfer ash conveying pump 204 arranged at the bottom of the first coarse ash transfer warehouse 202, and the fly ash in the second coarse ash transfer warehouse 203 is conveyed to the fly ash loading system 4 by using the third ash conveying pipe 14, so that the fly ash in the second coarse ash transfer warehouse 203 can be conveyed to the terminal ash unloading system 3 in the power plant.
When the utility model discloses in each conveyer pipe interior fly ash take place to gather and produce the lime bolt and when influencing the transport, compressed air can get into airflow scattered passageway 15 through a certain air-dispersing hole 16 on the second sleeve pipe 14, then come out from next air-dispersing hole 16 thereafter, compressed air (compressed air because each duct connection's air compression jar provides) that comes out through air-dispersing hole 16 then can cut off the long body lime bolt that gathers into short body lime bolt, short body lime bolt can continue to remove under compressed air's promotion, thereby reach the purpose that prevents each pipeline jam, therefore make the utility model discloses more can adapt to the long distance transport of fly ash, reduced the frequency that takes place stifled ash, reduced the maintenance cost of equipment, improved the transport efficiency of fly ash, economic benefits can improve.
Claims (8)
1. A coal-fired power plant fly ash combined pneumatic conveying system is characterized by comprising a pneumatic dust collection sending system (1), a transfer system (2), a terminal ash unloading system (3) and a fly ash shipping system (4), wherein the pneumatic dust collection sending system (1) is connected with the transfer system (2) through a first conveying pipe (5) and a second conveying pipe (6), and the transfer system (2) is connected with the fly ash shipping system (4) through a third conveying pipe (7), a fourth conveying pipe (8) and a fifth conveying pipe (9); still include sixth conveyer pipe (10), seventh conveyer pipe (11) and eighth conveyer pipe (12), the one end and the third conveyer pipe (7) of sixth conveyer pipe (10) are connected, the other end with terminal unloading system (3) are connected, the one end and the fourth conveyer pipe (8) of seventh conveyer pipe (11) are connected, the other end with terminal unloading system (3) are connected, the one end and the fifth conveyer pipe (9) of eighth conveyer pipe (12), the other end with terminal unloading system (3) are connected, first conveyer pipe (5), second conveyer pipe (6), third conveyer pipe (7), fourth conveyer pipe (8), fifth conveyer pipe (9), sixth conveyer pipe (10), seventh conveyer pipe (11), eighth conveyer pipe (12) include first sleeve pipe (13) and second sleeve pipe (14), the diameter of second sleeve pipe (14) is less than first sleeve pipe (13), an air flow dispersion channel (15) is formed between the first sleeve (13) and the second sleeve (14), and a plurality of air dispersion holes (16) arranged along the axial direction are formed in the second sleeve (14).
2. The coal-fired power plant fly ash combined type pneumatic conveying system according to claim 1, wherein the pneumatic dust sending system (1) comprises a first group of dust sending devices (17), a second group of dust sending devices (18), a third group of dust sending devices (19) and a fourth group of dust sending devices (20), the first group of dust sending devices (17) and the second group of dust sending devices (18) are connected with the transfer system (2) through a first conveying pipe (5), and the third group of dust sending devices (19) and the fourth group of dust sending devices (20) are connected with the transfer system (2) through a second conveying pipe (6).
3. The coal-fired power plant fly ash combined pneumatic conveying system of claim 2, the dust collection and purification device is characterized in that the first group of dust collection and transmission device (17), the second group of dust collection and transmission device (18), the third group of dust collection and transmission device (19) and the fourth group of dust collection and transmission device (20) respectively comprise an electrostatic dust collector, a plurality of pneumatic ash removal pumps (29) arranged below the electrostatic dust collector, a gasification air pipeline (22), a compressed air pipeline (23) for conveying and a compressed air storage tank (24), the pneumatic ash removal pumps (29) are connected in series through ash conveying pipes (28), the pneumatic ash removal pumps (29) are communicated with an ash bucket (21) of the electrostatic dust collector, the ash bucket (21) is connected with the gasification air pipeline (22), the ash conveying pipes (28) are connected with the compressed air pipeline (23) for conveying, and the compressed air pipeline (23) for conveying is connected with the compressed air storage tank (24).
4. The coal-fired power plant coal ash combined pneumatic conveying system of claim 3, wherein the transfer system (2) comprises a fine ash transfer warehouse (201), a first coarse ash transfer warehouse (202) and a second coarse ash transfer warehouse (203), the bottoms of the fine ash transfer warehouse (201), the bottoms of the first coarse ash transfer warehouse (202) and the second coarse ash transfer warehouse (203) are respectively provided with a dry ash scattering machine (205), the bottom of the fine ash transfer warehouse (201) is provided with 1 transfer ash conveying pump (204), the bottoms of the first coarse ash transfer warehouse (202) and the second coarse ash transfer warehouse (203) are respectively provided with 2 transfer ash conveying pumps (204), the transfer ash conveying pump arranged at the bottom of the fine ash transfer warehouse (201) is communicated with a third conveying pipe (7), one transfer ash conveying pump arranged at the bottom of the first coarse ash transfer warehouse (202) is communicated with the third conveying pipe (7), and the other transfer ash conveying pump arranged at the bottom of the first coarse ash transfer warehouse (202) is communicated with a fourth conveying pipe (8) One intermediate transfer ash conveying pump at the bottom of the second coarse ash intermediate transfer warehouse (203) is communicated with a fourth conveying pipe (8), and the other intermediate transfer ash conveying pump at the bottom of the second coarse ash intermediate transfer warehouse (203) is communicated with a fifth conveying pipe (9).
5. The coal-fired power plant coal ash combined type pneumatic conveying system of claim 4, wherein the terminal ash unloading system (3) comprises a terminal fine ash warehouse (303), a first terminal coarse ash warehouse (302) and a second terminal coarse ash warehouse (301), the terminal fine ash warehouse (303) is communicated with a sixth conveying pipe (10), the first terminal coarse ash warehouse (302) is communicated with the sixth conveying pipe (10), a seventh conveying pipe (11) and/or an eighth conveying pipe (12), and the second terminal coarse ash warehouse (301) is communicated with the eighth conveying pipe (12) and/or the seventh conveying pipe (11).
6. The coal-fired power plant coal ash combined type pneumatic conveying system of claim 5, characterized in that the ash loading system (4) comprises a buffer tank (401) and a spiral ash loader (402), wherein the spiral ash loader (402) is connected with the buffer tank (401), and the terminal ends of the third conveying pipe (7), the fourth conveying pipe (8) and the fifth conveying pipe (9) are connected with the buffer tank (401).
7. The coal-fired power plant fly ash combined pneumatic conveying system of claim 6, wherein the first conveying pipe (5) and the second conveying pipe (6) are both provided with a first reservoir top switching valve (25); the ash conveying pipe (28) is provided with a pipeline switching valve (26).
8. The coal-fired power plant fly ash combined pneumatic conveying system of claim 7, wherein the sixth conveying pipe (10), the seventh conveying pipe (11) and the eighth conveying pipe (12) are all provided with a second reservoir top switching valve (27).
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| CN201922184107.7U CN211812318U (en) | 2019-12-09 | 2019-12-09 | Coal-fired power plant fly ash combination formula air conveying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110817441A (en) * | 2019-12-09 | 2020-02-21 | 中国华电科工集团有限公司 | A combined type pneumatic conveying system for fly ash in a coal-fired power station and its operation method |
| CN112499264A (en) * | 2020-12-17 | 2021-03-16 | 中国华电科工集团有限公司 | Ash silo gasification air supply system and operation method thereof |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110817441A (en) * | 2019-12-09 | 2020-02-21 | 中国华电科工集团有限公司 | A combined type pneumatic conveying system for fly ash in a coal-fired power station and its operation method |
| CN110817441B (en) * | 2019-12-09 | 2024-12-20 | 中国华电科工集团有限公司 | A combined pneumatic conveying system for fly ash from a coal-fired power station and its operation method |
| CN112499264A (en) * | 2020-12-17 | 2021-03-16 | 中国华电科工集团有限公司 | Ash silo gasification air supply system and operation method thereof |
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