CN113446597A - Secondary air box for preventing large air box of cyclone burner from accumulating ash, boiler system and method - Google Patents
Secondary air box for preventing large air box of cyclone burner from accumulating ash, boiler system and method Download PDFInfo
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- CN113446597A CN113446597A CN202110876073.7A CN202110876073A CN113446597A CN 113446597 A CN113446597 A CN 113446597A CN 202110876073 A CN202110876073 A CN 202110876073A CN 113446597 A CN113446597 A CN 113446597A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 55
- 238000005192 partition Methods 0.000 claims abstract description 29
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000009825 accumulation Methods 0.000 claims abstract description 6
- 230000008021 deposition Effects 0.000 claims description 20
- 230000005484 gravity Effects 0.000 claims description 11
- 230000007306 turnover Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 9
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 239000002956 ash Substances 0.000 description 125
- 238000000151 deposition Methods 0.000 description 13
- 239000010881 fly ash Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 8
- 239000000779 smoke Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a secondary air box for preventing a large air box of a cyclone burner from accumulating dust, a boiler system and a method, wherein the secondary air box for preventing the large air box of the cyclone burner from accumulating dust comprises an air box body, a dust collecting pipeline and a plurality of layers of partition plates, the partition plates capable of dividing the interior of the air box body into a plurality of channels are arranged below each row of cyclones inside the air box body, a plurality of dust collecting funnels are arranged on each layer of partition plates and the bottom surface of the air box body, a dust conveying pipe penetrating through the partition plates and the bottom surface of the air box body is arranged at the bottom of each dust collecting funnel, a turning plate door is arranged on each dust conveying pipe, and the dust collecting funnels on the bottom surface of the air box body are connected with the dust conveying pipe and the dust collecting pipeline. The invention improves the original secondary air box to ensure that the secondary air box has the ash conveying capacity, and solves the problem of secondary air box ash accumulation in the operation process of the boiler, thereby greatly reducing the potential safety hazard caused by the secondary air box ash accumulation in the operation process of the boiler.
Description
Technical Field
The invention belongs to the technical field of coal-fired power generation, and relates to a secondary air box for preventing a cyclone burner large air box from accumulating ash, a boiler system and a method.
Background
The secondary wind box is an indispensable important component in a boiler combustion system, and is used for intensively collecting air required by fuel combustion and uniformly distributing the air to each combustor so as to ensure that the fuel is fully combusted in the boiler. However, in the actual operation process of the boiler, a large amount of fly ash is often found to be deposited in the secondary air big air box, and the safe and economic operation of the boiler is seriously influenced.
In a boiler adopting a swirl burner combustion mode, a secondary air wind box is an indispensable important component in a combustion system and collects air required by fuel combustion in a centralized manner, so that the air uniformly enters a hearth through each burner and is mixed with pulverized coal to finish a combustion process in the hearth. However, in the actual operation process of the boiler, a large amount of dust is often found to be deposited in the secondary air bellow, and the safe operation of the boiler is seriously influenced.
The main source of the fly ash particles in the air box is secondary air, air is introduced into a rotary air preheater at the tail part of the boiler by an air feeder, however, a large amount of smoke generated by burning coal dust in the boiler passes through the smoke side of the air preheater, the air preheater absorbs heat in the smoke, meanwhile, the fly ash particles in the smoke can be deposited on a heat accumulator of the air preheater, when the air preheater rotates to the air side, the heat on the air preheater can enable the air temperature to rise to form hot air, and the hot air can carry the thinner fly ash particles on the heat accumulator to enter the large air box through an air channel. After the fly ash particles enter the big air box, most fly ash particles enter the hearth to be combusted again along with secondary air through the combustor, and only a small part of fly ash particles are deposited in the big air box. However, it is known that power plant boilers are operated at all times and that as time increases, more and more fly ash particles are deposited at the bottom of the windbox. If the deposition in the untimely clearance bellows, the sedimentary thickness of fly ash can reach 1-2m in bellows bottom, and in the boiler operation in-process, the deposition in the bellows if can not in time clear up, the airflow in the secondary air bellows can be made to receive serious influence by the large amount of deposits of fly ash, causes following problem: 1. the continuous increase of the height of the deposited dust in the wind box causes the blockage of the channel of the circulation part of the secondary air of the burner, and the secondary air quantity entering the burner is insufficient; 2. the secondary air is not uniformly distributed along the radial direction of the burner, the flow field form of the outlet of the burner cannot be well organized, so that the secondary air and pulverized coal airflow cannot be fully mixed, the combustion is insufficient, the fly ash and ash residue of the boiler are increased, the boiler efficiency is reduced, and the economic operation of a boiler unit is influenced; 3. flying ash particles raised in the large air box enter the combustor, and the fire detection probe is possibly shielded to cause the loss of fire detection flame; 4. along with the continuous increase of deposition quantity in the big wind box, big wind box weight is along with the increase, causes the unstability of big wind box structure, increases the potential safety hazard.
At present, no effective solution is available for clearing away the deposited ash in the air box, and the existing technical scheme mainly utilizes the opportunity of stopping the boiler for maintenance every half year to open the air box, and adopts manpower to clear the deposited ash in the air box and transport the deposited ash to a designated place.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a secondary air box, a boiler system and a method for preventing the dust accumulation of a large air box of a cyclone burner.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
prevent secondary bellows of big bellows deposition of cyclone burner, including the bellows body, collection ash pipeline and a plurality of layers of baffle, the inside of bellows body is provided with the baffle that can divide into a plurality of passageways in the bellows body in the below of every row of swirler, be equipped with a plurality of collection ash funnels on the bottom surface of every layer of baffle and bellows body, the bottom of collection ash funnel is equipped with the ash conveying pipe that runs through baffle and bellows body bottom surface, be equipped with the panel turnover door on the ash conveying pipe, the ash collecting funnel of bellows body bottom surface is connected ash conveying pipe and collection ash tube coupling.
Preferably, the bottom surfaces of the partition plates and the bellows body are formed in a bent wave structure, and the valley portions of the bottom surfaces of the partition plates and the bellows body serve as the dust collection hoppers.
Preferably, each cyclone in each row of cyclones is respectively and vertically opposite to the partition plate and the wave crest part of the bottom surface of the air box body.
Preferably, the bottom surfaces of the partition plate and the bellows body are formed in a zigzag shape.
Preferably, the flap door is a gravity flap door.
Preferably, the bottom of the ash conveying pipe positioned at the upper layer of the cyclone is positioned above the cyclone.
Preferably, the ash collecting pipeline comprises an ash collecting manifold, an ash collecting funnel on the bottom surface of the air box body is connected with an ash conveying pipe and communicated with the ash collecting manifold, and the ash collecting manifold is obliquely arranged.
Preferably, the secondary air box for preventing the large air box of the cyclone burner from accumulating ash further comprises an ash collecting main pipe connected with the outlet of the ash collecting manifold pipe, the outlet of the ash collecting manifold pipe is provided with a bent part, and the bent part is vertically connected with the ash collecting main pipe.
The invention also provides a boiler system which comprises the secondary air box, wherein the secondary air box adopts the secondary air box for preventing the large air box of the cyclone burner from accumulating dust.
The working method of the secondary air box for preventing the dust accumulation of the large air box of the cyclone burner comprises the following steps:
for the upper and lower adjacent channels, the ash in the upper channel falls into the ash collecting hopper on the layer, and the ash collecting hopper on the layer collects the falling ash and conveys the collected ash to the ash collecting hopper on the lower channel through an ash conveying pipe; the ash collected by all the channels is transmitted layer by layer from top to bottom, the ash collecting hopper on the bottom surface of the air box body is conveyed to the ash collecting pipeline through the ash conveying pipe, and the collected ash is output by the ash collecting pipeline.
The invention has the following beneficial effects:
in the secondary air box for preventing the large air box of the cyclone burner from accumulating dust, the partition plate is arranged below each row of cyclones through the interior of the air box body, the inner cavity of the original secondary air box can be divided into a plurality of layers of channels by utilizing the partition plate, and each layer of channel corresponds to one row of cyclones; the bottom surfaces of the partition plates and the air box body are provided with a plurality of ash collecting funnels, so that ash in each layer of channel can be collected through the ash collecting funnels, the funnel has an inclined structure, so that ash in the secondary air box can be gathered in the opportunity funnels under the action of gravity, the bottom of the ash collecting funnels is provided with ash conveying pipes penetrating through the partition plates and the bottom surface of the air box body, and the ash conveying pipes can be used for realizing the communication of dust circulation channels among the channels of each layer, so that the dust can conveniently fall layer by layer under the action of gravity for collection; be equipped with the flap gate on the defeated ash pipe, utilize the flap gate can prevent the wind phenomenon of scurrying between each layer passageway, through opening flap gate intermittent type nature, can realize collecting the transport of dust and prevent scurrying wind of each layer passageway. The dust collecting funnel (namely the dust collecting funnel at the lowermost layer) at the bottom surface of the air box body is connected with the dust conveying pipe and the dust collecting pipeline, and the dust collected in the secondary air box can be discharged through the dust collecting pipeline. In conclusion, the original secondary air box is improved, so that the secondary air box has the ash conveying capacity, the problem of ash deposition of the secondary air box is solved in the operation process of the boiler, and the potential safety hazard caused by the ash deposition of the secondary air box in the operation process of the boiler is greatly reduced.
Furthermore, the bottom surfaces of the partition board and the bellows body are arranged to be of bent wave structures, the structure is simple, spontaneous collection of dust under the action of self gravity is achieved, and dust deposition on the partition board can be prevented.
Furthermore, each cyclone in each row of cyclones is respectively opposite to the partition plate and the wave crest part of the bottom surface of the air box body from top to bottom, so that ash generated at the cyclones is not easy to deposit and can be quickly collected.
Furthermore, the turning plate door adopts the gravity turning plate door, so that the turning plate door automatically opens to convey ash after the ash in the ash collecting hopper reaches a certain weight, an additional control mechanism is not needed, the turning plate door is opened by the gravity of the ash, and the operation is reliable and stable.
Furthermore, the bottom of the ash conveying pipe positioned on the upper layer of the cyclone is positioned above the cyclone, so that the interference of the ash conveying pipe on the airflow at the inlet of the cyclone can be prevented.
Furthermore, the ash collecting pipe is obliquely arranged, so that dust can flow and be discharged through the gravity of the dust collecting pipe.
Furthermore, the outlet of the ash collecting manifold is provided with a bent part, the bent part is vertically connected with the ash collecting main pipe, so that dust in the ash collecting manifold conveniently falls into the ash collecting main pipe through gravity, and the ash collecting main pipe can uniformly output the dust.
Drawings
FIG. 1 is a schematic view showing a secondary windbox installation position of the invention for preventing the large windbox of the cyclone burner from accumulating ash;
FIG. 2 is a three-dimensional model of the installation position of the secondary wind box for preventing the large wind box of the cyclone burner from depositing ash according to the present invention
Description of reference numerals:
1 ash collecting funnel, 2 panel turnover doors, 3 ash conveying pipes, 4 ash collecting pipes, 4-1 bending parts, 5 ash collecting main pipes, 6 first-layer large air boxes, 7 second-layer large air boxes, 8 third-layer large air boxes, 9-cyclone, 10-hearth and 11-air box bodies.
Detailed Description
The invention is further described below with reference to the figures and examples.
Referring to fig. 1 and 2, the secondary air box for preventing the large air box of the cyclone burner from accumulating dust comprises an air box body 11, a dust collecting pipeline and a plurality of layers of partition plates, wherein the partition plates capable of dividing the interior of the air box body 11 into a plurality of channels are arranged below each row of cyclones inside the air box body 11, a plurality of dust collecting funnels 1 are arranged on each layer of partition plates and the bottom surface of the air box body 11, a dust conveying pipe 3 penetrating through the partition plates and the bottom surface of the air box body 11 is arranged at the bottom of each dust collecting funnel 1, a flap door 2 is arranged on each dust conveying pipe 3, and the dust collecting funnels 1 on the bottom surface of the air box body 11 are connected with the dust conveying pipe 3 and the dust collecting pipeline.
Referring to fig. 1 and 2, the bottom surfaces of the partition plates and the bellows body 11 are formed in a folded wave structure, and the valley portions of the bottom surfaces of the partition plates and the bellows body 11 serve as the dust hoppers 1.
Referring to fig. 1 and 2, as a preferred embodiment of the present invention, each cyclone in each row of cyclones is vertically opposed to the partition and the peak portion of the bottom surface of the windbox body 11.
Referring to FIGS. 1 and 2, the bottom surfaces of the diaphragm and the bellows body 11 are formed in a zigzag shape as a preferred embodiment of the present invention.
As a preferred embodiment of the present invention, the flap door 2 is a gravity flap door.
Referring to fig. 1 and 2, as a preferred embodiment of the present invention, the bottom of the ash duct 3 located at the upper layer of the cyclone is located above the cyclone.
Referring to fig. 1 and 2, the ash collecting pipeline includes an ash collecting manifold 4, an ash collecting hopper 1 on the bottom surface of the air box body 11 is connected with an ash conveying pipe 3 and is communicated with the ash collecting manifold 4, and the ash collecting manifold 4 is obliquely arranged.
Referring to fig. 1 and 2, the secondary wind box for preventing the cyclone burner large wind box from ash deposition according to the present invention further includes an ash collecting main pipe 5 connected to an outlet of the ash collecting main pipe 4, and the outlet of the ash collecting main pipe 4 is provided with a bent portion vertically connected to the ash collecting main pipe 5.
The invention also provides a boiler system, which comprises a secondary air box and a cyclone burner, wherein the secondary air box adopts the secondary air box for preventing the large air box of the cyclone burner from accumulating ash, which is disclosed by the invention, with reference to fig. 1 and 2.
The working method of the secondary air box for preventing the dust accumulation of the large air box of the cyclone burner comprises the following steps:
for the channels adjacent up and down, the ash in the upper layer channel falls into the ash collecting hopper 1 on the layer, and the ash collecting hopper 1 on the layer collects the falling ash and conveys the collected ash to the ash collecting hopper 1 on the lower layer channel through the ash conveying pipe 3; the ash collected by all the channels is transmitted layer by layer from top to bottom, the ash collecting hopper 1 on the bottom surface of the air box body 11 is conveyed to the ash collecting pipeline through the ash conveying pipe 3, and the collected ash is output by the ash collecting pipeline.
Examples
The secondary air box for preventing the large air box of the cyclone burner from accumulating ash has a simple structure, partition plates are sequentially arranged between every two layers of burners and between the burners and an air box air inlet from the upper layer of the large air box to the lower layer of the large air box, the secondary air box is integrally divided into a first layer of air box 6, a second layer of air box 7 and a third layer of air box 8 from top to bottom through the two layers of partition plates, an ash collecting funnel 1 is arranged on the bottom surface of each layer of partition plate and an air box body 11, an ash conveying pipe 3 is arranged at the lower end of the ash collecting funnel 1, a flap door 2 for controlling the opening and closing of the ash conveying pipe 3 is arranged at the ash conveying pipe 3, the ash conveying pipe 3 connected with the ash collecting funnel 1 on the bottom surface of the air box body 11 is communicated with an ash conveying collecting pipe 4 below, the outlet of the ash conveying collecting pipe 4 extends to the ash conveying main pipe 5 below, the ash conveying main pipe 4 is obliquely arranged, the ash conveying main pipe 5 is horizontally arranged, the outlet end of the ash conveying main pipe 4 is arranged as a bent part, as shown in fig. 1, the bent portion is vertically connected to the ash conveying main pipe 5.
Referring to fig. 1 and 2, a plurality of dust-collecting funnels 1 are arranged on the floor of each layer of large bellows (namely, a first layer of bellows 6, a second layer of bellows 7 and a third layer of bellows 8), the dust-collecting funnels 1, dust conveying pipes 2 and flap gates 3 form an independent dust conveying system, dust in the first layer of bellows 6 is conveyed to the second layer of bellows 7, dust in the second layer of bellows 7 is conveyed to the third layer of bellows 8, and the dust is conveyed away through a dust conveying collecting pipe 4 and a dust conveying main pipe 5. The number of the ash deposition funnels arranged in each layer of the large air box is equal to the number of the cyclone burners of each layer plus 1. Compared with the original traditional large air box structure, the invention changes the original flat plate of each air box floor into the serrated floor; the bottom plate right below each cyclone burner is arranged into a convex part, so that dust is not easy to accumulate in the operation process; the bottom plate between two adjacent cyclone burners is arranged into a concave funnel shape, and the accumulated dust of the wind box is completely collected in the funnel in the operation process of the boiler; the funnel penetrates through the air box floor and is parallel to the lower layer air box top plate, then a short section of ash conveying pipe is welded and installed at the bottom of the funnel, and a set of flap gate is installed on the ash conveying pipe; the plate turnover door is a gravity plate turnover door, and when the ash in the hopper reaches a certain weight, the plate turnover door automatically opens to convey the ash; ash in each ash collecting hopper in the first layer of large air box is automatically conveyed into only the second layer of large air box, the second layer of large air box is automatically conveyed into the third layer of large air box, and the rest is done in the same way; and finally, conveying all the ash in the largest wind box at the lowest layer to an ash conveying collecting pipe or an ash conveying main pipe through an automatic ash conveying device, and finally conveying the ash to a designated place through a pipeline. The flap door 2 is in a closed state under the condition of no dust deposition or little dust deposition, so that the phenomenon of wind channeling among the first, second and third large wind boxes in the operation process is avoided.
In conclusion, the invention adopts a simple mechanical mechanism to realize the cleaning and conveying of the ash deposited in the large wind box, effectively restrains the combustion deterioration caused by the turbulence of secondary air flow caused by the ash deposition, and plays a positive role in promoting the combustion organization in the furnace.
Claims (10)
1. Prevent secondary bellows of big bellows deposition of cyclone burner, a serial communication port, including bellows body (11), collection ash pipeline and a plurality of layers of baffle, the inside of bellows body (11) is provided with the baffle that can divide into a plurality of passageways in bellows body (11) in the below of every row of swirler, be equipped with a plurality of collection ash funnels (1) on the bottom surface of every layer of baffle and bellows body (11), the bottom of collection ash funnel (1) is equipped with defeated ash pipe (3) that run through baffle and bellows body (11) bottom surface, be equipped with panel turnover door (2) on defeated ash pipe (3), defeated ash pipe (3) and collection ash tube coupling are connected in collection ash funnel (1) of bellows body (11) bottom surface.
2. The secondary windbox for preventing the large windbox ash deposition of a cyclone burner as claimed in claim 1, wherein the bottom surfaces of the partition plates and the windbox body (11) are formed in a bent wave structure, and the valley portions of the bottom surfaces of the partition plates and the windbox body (11) serve as the ash collection funnels (1).
3. The secondary windbox for preventing ash deposition in a large windbox of a cyclone burner as claimed in claim 1, wherein each cyclone in each row of cyclones is vertically opposed to the partition plate and the crest portion of the bottom surface of the windbox body (11), respectively.
4. The secondary windbox for preventing ash deposition in a large windbox of a cyclone burner as claimed in claim 2, wherein the bottom surfaces of the partition plate and the windbox body (11) are formed in a zigzag shape.
5. The secondary windbox for preventing the large windbox ash deposition of a cyclone burner as claimed in claim 1, wherein the flap door (2) is a gravity flap door.
6. The secondary windbox for preventing ash deposition in a large windbox of a cyclone burner according to claim 1, wherein the bottom of the ash duct (3) located at the upper layer of the cyclone is located above the cyclone.
7. The secondary air box for preventing the large air box of the cyclone burner from being accumulated with ash according to claim 1, wherein the ash collecting pipeline comprises an ash collecting manifold (4), an ash collecting hopper (1) at the bottom surface of the air box body (11) is connected with the ash conveying pipes (3) and is communicated with the ash collecting manifold (4), and the ash collecting manifold (4) is obliquely arranged.
8. The secondary air box for preventing the large air box of the cyclone burner from ash deposition is characterized by further comprising an ash collecting main pipe (5) connected with an outlet of the ash collecting manifold pipe (4), wherein the outlet of the ash collecting manifold pipe (4) is provided with a bent part which is vertically connected with the ash collecting main pipe (5).
9. A boiler system characterized by comprising a secondary wind box employing the secondary wind box for preventing the dust accumulation in the large wind box of the cyclone burner claimed in any one of claims 1 to 8.
10. The method for operating a secondary windbox for preventing ash deposition in a large windbox of a cyclone burner as set forth in any one of claims 1 to 8, comprising the steps of:
for the channels adjacent up and down, the ash in the upper layer channel falls into the ash collecting hopper (1) on the layer, and the ash collecting hopper (1) on the layer collects the falling ash and conveys the collected ash to the ash collecting hopper (1) on the lower layer channel through the ash conveying pipe (3); the ash collected by all the channels is transmitted layer by layer from top to bottom, the ash collecting hopper (1) on the bottom surface of the air box body (11) is conveyed to an ash collecting pipeline through the ash conveying pipe (3), and the collected ash is output by the ash collecting pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110876073.7A CN113446597A (en) | 2021-07-30 | 2021-07-30 | Secondary air box for preventing large air box of cyclone burner from accumulating ash, boiler system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110876073.7A CN113446597A (en) | 2021-07-30 | 2021-07-30 | Secondary air box for preventing large air box of cyclone burner from accumulating ash, boiler system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060844A (en) * | 2021-11-24 | 2022-02-18 | 国能蚌埠发电有限公司 | Prevent bellows structure of secondary bellows deposition |
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| CN110836366A (en) * | 2019-12-16 | 2020-02-25 | 杭州锅炉集团股份有限公司 | Primary air step type wave air distribution and slag discharge device of circulating fluidized bed boiler |
| CN111365724A (en) * | 2020-03-05 | 2020-07-03 | 华电电力科学研究院有限公司 | Smoke duct system and method for preventing horizontal section from accumulating dust |
| CN215336286U (en) * | 2021-07-30 | 2021-12-28 | 西安热工研究院有限公司 | Secondary air box for preventing dust accumulation of large air box of cyclone burner and boiler system |
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| CN114060844A (en) * | 2021-11-24 | 2022-02-18 | 国能蚌埠发电有限公司 | Prevent bellows structure of secondary bellows deposition |
| CN114060844B (en) * | 2021-11-24 | 2023-12-26 | 国能蚌埠发电有限公司 | Prevent bellows structure of overgrate air case deposition |
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