CN111473348A - Boiler bellows deposition ash handling equipment - Google Patents
Boiler bellows deposition ash handling equipment Download PDFInfo
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- CN111473348A CN111473348A CN202010461946.3A CN202010461946A CN111473348A CN 111473348 A CN111473348 A CN 111473348A CN 202010461946 A CN202010461946 A CN 202010461946A CN 111473348 A CN111473348 A CN 111473348A
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- ash
- dust
- layer
- deposition
- removal
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- 230000008021 deposition Effects 0.000 title claims abstract description 73
- 239000000428 dust Substances 0.000 claims abstract description 187
- 238000001514 detection method Methods 0.000 claims abstract description 61
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000010410 dusting Methods 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000009423 ventilation Methods 0.000 abstract description 5
- 239000002956 ash Substances 0.000 description 184
- 238000006073 displacement reaction Methods 0.000 description 8
- 239000010881 fly ash Substances 0.000 description 8
- 239000004071 soot Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 201000004569 Blindness Diseases 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a boiler air box dust deposition and removal device, which comprises an ash removal plate arranged below a combustor on the same layer in an air box; the dust removing plate is provided with a dust removing hole with adjustable on-off for dust to fall; the detection tracks are used for being attached to the side wall of the air box and respectively extend along the length direction and the thickness direction of the ash removing plate; a detector for detecting the height of the deposited dust on the upper surface of the dust removing plate is connected in the detection track in a sliding manner; the dust removing holes are communicated when the detector obtains that the dust deposition height is greater than the preset height; an ash collecting device used for collecting and discharging dust falling from the ash removing holes is arranged below the ash removing plate positioned at the bottommost layer of the air box. This boiler bellows deposition ash handling equipment utilizes the dusting hole to realize that the bellows cavity and the collection ash handling equipment of dusting board top communicate and the disconnection, guarantees that this boiler bellows deposition ash handling equipment has great dusting area in the dusting operation, has also avoided increasing the ventilation resistance of overgrate air, has the characteristics that the reliability is high, the energy consumption is low, the feasibility is strong.
Description
Technical Field
The invention relates to the field of boilers, in particular to a boiler air box dust deposition and removal device.
Background
The coal-fired boiler is a thermal device which utilizes heat energy released by pulverized coal combustion to heat working medium water to steam with certain parameters. The air required by the pulverized coal during combustion in the furnace enters the hearth through the secondary air bellows, during the actual operation process, the fly ash formed by the pulverized coal combustion can be partially deposited in the heat accumulator of the corrugated plate fully distributed in the rotary air preheater, and the secondary air can carry the fly ash attached and deposited at the position to enter the bellows when flowing through the heat accumulator. As the flow area of the secondary air in the air box is increased, the air speed is reduced, the capability of the secondary air for carrying the fly ash is reduced, and part of the fly ash is deposited in the air box.
After the coal-fired boiler runs for a long time, fly ash in the air box is seriously accumulated, so that the blockage of an air box channel and inner and outer secondary air nozzles is caused, and further the jamming of structures such as connecting rods, blades and the like is caused, the ventilation resistance is improved, the air quantity distribution of the nozzles on the same layer is uneven, the circumferential air inlet of a single nozzle is uneven, the problems of partial burning, coking, nozzle burning loss, carbon monoxide, nitric oxide and fly ash rising, unit efficiency reduction and the like of the boiler are caused.
The existing ash removal technology comprises compressed air power, rotary scraper type ash removal, an electromagnetic valve and a stop valve which are matched with an ash collection hopper for ash removal. The ash removal mode has high energy consumption and low efficiency, and a larger ash removal dead zone exists; because the dust deposition degree and whether the dust is deposited can not be detected, the dust removing operation has blindness, and the energy consumption is further improved. The latter can not judge the dust deposition degree, and the dust removing operation has blindness; the working environment of the electromagnetic valve and the stop valve under the high-temperature and high-dust environment is severe, the electromagnetic valve and the stop valve are easy to jam and have low reliability. In addition, in the latter case, since the size of the dust hopper is large, it is generally installed only in the bottom burner windbox, and it is impossible to install the dust hopper in the middle and upper windboxes, which affects the dust removing effect in various places in the windbox. Although the fly ash collecting device can be respectively arranged in the bottom, middle and upper bellows, the ventilation area of the bellows is reduced due to the small-size ash collecting hopper with the air lock, so that the circulation resistance of secondary air is increased, the secondary air is not favorable for flowing, and the deposition problem of fly ash in the bellows is aggravated.
Disclosure of Invention
The invention aims to provide a boiler air box dust deposition and removal device which has the characteristics of high reliability, low energy consumption, strong feasibility and the like in the dust removal operation.
In order to achieve the above object, the present invention provides a boiler wind box ash deposition and removal device, comprising:
an ash removal plate arranged along the lower part of the same-layer combustor in the wind box; the dust removing plate is provided with a dust removing hole which is adjustable in on-off and used for allowing dust to fall;
the detection tracks are used for being attached to the side wall of the air box and respectively extend along the length direction and the thickness direction of the ash removing plate;
a detector for detecting the height of accumulated dust on the upper surface of the dust removing plate is connected in the detection track in a sliding manner; the ash removing holes are communicated when the detector obtains that the ash deposition height is greater than a preset height;
and an ash collecting device which is used for collecting and discharging the dust falling from the ash removing holes is arranged below the ash removing plate positioned at the bottommost layer of the air box.
Preferably, the ash removing plate comprises a plurality of ash removing plates; the plurality of ash removing plates are arranged below the burners at each layer at intervals;
the detection track comprises a plurality of groups; the multiple groups of detection tracks are respectively arranged corresponding to the plurality of ash removal plates.
Preferably, any one group of the detection tracks comprises a horizontal detection track and a plurality of longitudinal detection tracks which are vertically connected with the horizontal detection track;
all the longitudinal detection tracks are arranged between adjacent burners on the same layer at intervals.
Preferably, any one of the detection tracks is connected with one of the detectors in a sliding manner, or all the detection tracks are communicated.
Preferably, any one of the dust removing plates forms a sealed cavity with the top surface of the air box when the dust removing hole is blocked.
Preferably, the ash collecting device comprises an ash collecting hopper with a hopper opening communicated with the bottom of the air box and an ash dropping pipe communicated with a hopper tail of the ash collecting hopper;
the ash collecting hopper is connected with a vibrator;
the ash falling pipe is connected with an air lock.
Preferably, the detector is embodied as an ultrasonic detector or an X-ray meter.
Preferably, the ash removing plate comprises an ash removing plate fixing layer and an ash removing plate moving layer which are overlapped up and down; the movable layer of the ash removing plate is connected with the fixed layer of the ash removing plate in a sliding way;
the ash removing holes comprise upper ash removing holes arranged on the ash removing plate fixing layer and lower ash removing holes arranged on the ash removing plate moving layer;
the dust removing holes are blocked when all the upper dust removing holes and all the lower dust removing holes are staggered, and are communicated when all the upper dust removing holes and all the lower dust removing holes are partially aligned and fully aligned.
Preferably, the dust removing plate further comprises a first protective net fixed above the dust removing plate fixing layer in parallel and a second protective net installed below the dust removing plate movable layer in parallel.
Preferably, the movable layer of the ash removing plate is connected with a telescopic rod and a telescopic rod driving device which horizontally reciprocate; the telescopic rod driving device and the detector are both connected to a controller; the controller is in when deposition height is greater than and predetermines the height through telescopic link drive arrangement drives the dust removal board movable layer removes extremely the ash removal hole intercommunication when deposition height is not more than and predetermines the height through telescopic link drive arrangement drives the dust removal board movable layer removes and extremely the ash removal hole is stifled disconnected.
Compared with the prior art, the boiler air box dust deposition and removal device provided by the invention comprises an ash removal plate which is arranged in an air box and is provided with an ash removal hole, a detection rail which is attached to the side wall of the air box, a detector which slides along the detection rail, and an ash collection device which is arranged at the bottom of the air box and is communicated with the air box.
The ash removing plate is arranged along the lower part of the same-layer combustor in the air box. The dust removing holes of the dust removing plate have two states of connection and disconnection, and when the dust removing holes are in the connection state, the air box cavity above the dust removing plate is communicated with the dust collecting device; when the ash removing hole is in a blocking state, the air box cavity above the ash removing plate is disconnected with the ash collecting device.
The detection tracks respectively extend along the length direction and the thickness direction of the ash removal plate and are used for enabling the detector to generate transverse displacement between the burners on the same layer and generate longitudinal displacement on one side of any burner.
The detector is used for detecting the height of the deposited ash at one side of any combustor when the longitudinal displacement is generated at the combustor, and is used for changing the detection position when the transverse displacement is generated among a plurality of combustors at the same side. And when the detector obtains that the accumulated dust height is greater than the preset height, the dust removing holes are communicated. The dust collecting device is arranged below the dust removing plate at the bottommost layer of the air box, is communicated with the air box and is used for collecting and discharging dust falling from the dust removing holes.
The boiler air box dust deposition and removal device provided by the invention detects the dust deposition state in the air box through the detection track and the detector, and then adjusts the on-off state of the dust removal hole according to the detection result, so that the air box cavity above the dust removal plate is communicated with the dust collection device when the dust deposition height is greater than the preset height, and the dust deposition is discharged from the dust removal hole into the dust collection device; and when the accumulated dust height is not more than the preset height or the air box is relatively clean, the air box cavity above the dust removing plate is isolated from the dust collecting device, so that the dust removing operation is stopped.
Above-mentioned boiler bellows deposition ash handling equipment adopts the dusting board to install in the burning zone below on the same floor, utilizes the dusting hole to realize the bellows cavity and the collection ash handling intercommunication and the disconnection of dusting board top, has both guaranteed that this boiler bellows deposition ash handling equipment has great dusting area in the dusting operation, avoids increasing the ventilation resistance of overgrate air again, has the characteristics that the reliability is high, the energy consumption is low, the feasibility is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view showing an assembly of an ash deposition and removal device for a boiler wind box, a wind box and a burner, according to an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic structural view of an ash removal plate according to an embodiment of the present invention;
FIG. 4 is a schematic view of the soot-removing plate according to the embodiment of the present invention in another direction.
The device comprises a wind box, a burner, a dust removing plate 1, a dust removing plate 11, a dust removing plate fixing layer 111, an upper dust removing hole 12, a dust removing plate moving layer 121, a lower dust removing hole 122, a guide block 13, a first protective net 14, a second protective net 2, a detection track 21, a transverse detection track 21, a longitudinal detection track 22, a detector 3, an ash collecting hopper 4, an ash dropping pipe 5, a vibrator 6, an air locker 7 and an expansion link 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 4, fig. 1 is a schematic view illustrating an assembly of an ash deposition and removal device for a boiler windbox, the windbox and a burner according to an embodiment of the present invention; FIG. 2 is a side view of FIG. 1; FIG. 3 is a schematic structural view of an ash removal plate according to an embodiment of the present invention; FIG. 4 is a schematic view of an ash removing plate provided in an embodiment of the present invention in another direction
The invention provides a boiler air box dust deposition and removal device which comprises an ash removal plate 1 arranged in an air box 01, a detection rail 2 attached to the side wall of the air box 01, a detector 3 sliding along the detection rail 2 and an ash collection device arranged at the bottom of the air box 01 and communicated with the air box 01.
The ash removal plate 1 is arranged along the inside of the windbox 01 below the same-layer combustor 02. The ash removing plate 1 may be disposed only below the lowermost burners 02 in the windbox 01, that is, disposed in the bottom windbox, or the ash removing plates 1 may be disposed below the plurality of burners 02. For the soot panel 1 under the same-layer combustor 02, the soot panel 1 may be disposed in the region of the soot deposition focal point or may be distributed over the cross section of the windbox 01.
The dust removing plate 1 has dust removing holes through which dust falls. The ash removing hole has two states of connection and blockage. When the ash removing holes are in a communicated state, the air box cavity above the ash removing plate 1 is communicated with the ash collecting device; when the ash removing hole is in a blocking state, the air box cavity above the ash removing plate 1 is isolated from the ash collecting device.
The detection track 2 is attached to the side wall of the air box 01 and extends along the length direction and the thickness direction of the ash removing plate 1. The detector 3 is connected in the detection track 2 in a sliding mode, when the detector 3 generates longitudinal displacement on one side of any combustor 02 along the detection track 2, the detector 3 is used for detecting the ash deposition height of the combustor 02, and when the detector 3 generates transverse displacement between the combustors 02 on the same layer along the detection track 2, the detector 3 is used for moving to different combustors 02 to further detect the ash deposition heights of different combustors 02 respectively.
When the detector 3 acquires that the deposition height is greater than the preset height, the dust removing holes are communicated, so that the air box cavity above the dust removing plate 1 is communicated with the dust collecting device, and the dust collecting device is arranged below the dust removing plate 1 at the bottommost layer of the air box 01, therefore, except that part of dust is brought into a hearth by secondary air in the falling process, the rest dust falls to the bottom of the air box 01 and enters the dust collecting device, and is finally conveyed into the hearth through the dust collecting device. The ratio of the two dust parts to the direction of the dust is related to the diameter of the dust removing hole. When the aperture of the ash removing hole is small, most of the deposited ash can be blown into the hearth through the secondary air through the nozzle, and when the aperture of the ash removing hole is large, most of the deposited ash can fall into the ash collecting device and then enter the hearth.
In summary, the detector 3 patrols and detects along the detection track 2, and when the air box 01 is detected to be cleaner, namely the deposition height is not more than the preset height, the ash removing plate 1 and the ash collecting device do not work; when the detector 3 detects that the dust deposition height reaches the set condition, namely is greater than the preset height, the dust removing plate 1 and the dust collecting device start to work until the condition of stopping dust removing operation is triggered, and the dust removing plate 1 and the dust collecting device stop working.
In the dust removing operation, the dust removing device for the dust deposited on the boiler air box provided by the invention firstly detects the dust deposited state in the air box 01 through the detector 3, and then adjusts the on-off state of the dust removing hole according to the detection result, so that the air box cavity above the dust removing plate 1 is communicated with the dust collecting device when the dust deposited height is greater than the preset height, the dust is discharged from the dust removing hole into the dust collecting device, otherwise, the air box cavity above the dust removing plate 1 is blocked from the dust collecting device, and the dust removing operation is stopped.
This boiler bellows deposition ash handling equipment utilizes the dust board 1 that has the ash removal hole to realize the bellows cavity and the collection ash handling equipment intercommunication and the disconnection of dust board 1 top, and when the dust hole intercommunication, this boiler bellows deposition ash handling equipment has great dusting area, still avoids increasing the ventilation resistance of overgrate air simultaneously, has the characteristics that the reliability is high, the energy consumption is low, the feasibility is strong.
The ash deposition and removal device for the boiler wind box provided by the invention is further described below by combining the attached drawings and the embodiment.
On the basis of the above embodiment, for better ash removal effect, the boiler wind box ash deposition and removal device comprises a plurality of ash removal plates 1, and the plurality of ash removal plates 1 are arranged below each layer of combustor 02 at intervals.
Taking the example of three layers of burners 02 in the wind box 01, the ash deposition and removal device of the boiler wind box comprises three ash removal plates 1, wherein a first ash removal plate 1 (hereinafter referred to as a first layer ash removal plate 1) is arranged between the first layer of burners 02 and the second layer of burners 02, and the first ash removal plate 1 can be horizontally distributed so as to be parallel to the first layer of burners 02; a second soot sheet 1 (hereinafter referred to as a second layer soot sheet 1) is disposed between the second layer burner 02 and the third layer burner 02; a third dust removing plate 1 (hereinafter referred to as a third layer dust removing plate 1) is provided below the third layer burner 02 and above the dust collecting device.
When the dust-collecting and dust-removing device for the boiler air box works, the dust-collecting holes of the three dust-removing plates 1 can be simultaneously communicated, so that the dust collected in the air box 01 directly falls into the dust-collecting device from top to bottom, and the dust-collecting holes of the three dust-removing plates 1 can also be sequentially communicated, so that the dust collected in the air box 01 falls down layer by layer. In order to prevent excessive dust from being deposited on the bottom of the bellows 01 at the same time, the lower layer, the middle layer and the upper layer are preferably sequentially subjected to dust removal, and then the middle layer and the lower layer are subjected to dust removal again.
The lower layer, the middle layer and the upper layer sequentially remove dust specifically means that firstly, the dust removing holes of the dust removing plate 1 at the third layer are communicated, the dust at the position of the combustor 02 at the third layer falls into the dust collecting device, and the dust removing holes of the dust removing plate 1 at the third layer are blocked after dust removal is finished; then communicating the ash removing holes of the second layer of ash removing plate 1, enabling the ash deposition at the second layer of combustor 02 to fall to the third layer of ash removing plate 1, and blocking the ash removing holes of the second layer of ash removing plate 1 after the ash removal is finished; and then the ash removing holes of the first layer of ash removing plate 1 are communicated, so that the deposited ash at the first layer of combustion part falls to the second layer of ash removing plate 1. In the above operation, the ash deposition at the third layer of burner 02 falls into the ash collecting device, the ash deposition at the second layer of burner 02 falls into the third layer of ash removing plate 1, and the ash deposition at the first layer of burner 02 falls into the second layer of ash removing plate 1.
The middle layer and the lower layer are subjected to secondary ash removal specifically, the ash removal holes of the ash removal plate 1 on the second layer are communicated, the accumulated ash of the second layer of the combustor 02 is made to fall to the ash removal plate 1 on the third layer, the ash removal holes of the ash removal plate 1 on the second layer are blocked after the ash removal is finished, the ash removal holes of the ash removal plate 1 on the third layer are communicated, and the accumulated ash of the third layer of the combustor 02 is made to fall into the ash collection device. In the above operation, the deposited dust at the second layer of burners 02 falls to the third layer of the dust removing plate 1, and finally the dust is completely removed from the wind box 01 by the third layer of the dust removing plate 1.
Obviously, besides the specific ash removal mode of sequentially removing ash from the lower layer, the middle layer and the upper layer and then removing ash from the middle layer and the lower layer again, the ash removal mode of sequentially removing ash from the lower layer, the middle layer and the upper layer, then removing ash from the lower layer and the middle layer again and finally removing ash from the lower layer can also be adopted. In the latter case, compared with the former case, any one of the soot-removing plates 1 always accumulates only one layer of soot at the burner 02.
In order to improve the dust deposition detection effect of the detector 3 on each position in the air box 01, the dust deposition and removal device for the boiler air box provided by the invention comprises a plurality of groups of detection rails 2, wherein the plurality of groups of detection rails 2 are respectively arranged corresponding to the plurality of dust removal plates 1. Briefly, an ash removing plate 1 corresponds to a group of detection rails 2, and when a detector 3 slides along the group of detection rails 2, the detector 3 generates transverse displacement and longitudinal displacement relative to the burners 02 on the same layer where the ash removing plate 1 is located, so that each burner 02 is located in the detection range of the detector 3.
Referring to fig. 1, the detection track 2 may include a horizontal detection track 21 and a plurality of longitudinal detection tracks 22 vertically connected to the horizontal detection track 21, and the plurality of longitudinal detection tracks 22 are disposed between adjacent burners 02 on the same floor at intervals.
When the boiler operates, the middle of two adjacent combustors 02 of the same-layer combustor 02 in the wind box 01 is the place with the most serious ash deposition, so that the longitudinal detection rail 22 is vertically arranged between the adjacent combustors 02 and is communicated with the transverse detection rail 21, and the ash deposition detection at the same-layer combustor 02 is realized.
On the basis of the above embodiment, one detector 3 is slidably connected to any one set of detection tracks 2, and a plurality of detectors 3 are respectively connected to a plurality of sets of detection tracks 2. In addition, all the detection tracks 2 can be communicated, and the boiler air box dust deposition and removal device adopts one detector 3 to detect the dust deposition condition in the whole air box 01.
For better technical results, any one of the dust-removing plates 1 is arranged along the cross section of the wind box 01 so as to form a sealed chamber with the top surface of the wind box 01 when all the dust-removing holes of the dust-removing plate 1 are blocked.
The ash collecting device adopted by the invention can comprise an ash collecting hopper 4, an ash dropping pipe 5, a vibrator 6 and an air locker 7.
The hopper opening of the ash collecting hopper 4 is communicated with the bottom of the air box 01, and the hopper tail of the ash collecting hopper 4 is communicated with an ash falling pipe 5. The dust collecting hopper 4 is connected with a vibrator 6 for removing the deposited dust attached to the inner wall of the dust collecting hopper 4. The ash falling pipe 5 is connected with an air lock 7 for preventing secondary air from entering the hearth, but the falling ash deposit is not blocked from entering the hearth.
The detector 3 can realize the timing automatic circuit detection along the detection track 2 through program control. When the detector 3 detects that the ash deposition height is greater than a preset height, such as the highest ash deposition height, the ash collector and the ash collector are started to start ash removal. When the ash deposition height is reduced to be lower than the standard ash deposition height, the ash remover stops working. Obviously, the maximum ash deposition height is greater than the standard ash deposition height, the normal operation of the boiler is influenced when the ash deposition exceeds the maximum ash deposition height, and the influence on the operation of the boiler between the maximum ash deposition height and the standard ash deposition height is small and almost negligible.
The detector 3 may be configured in particular as an ultrasonic detector or as an X-ray detector. Taking the ultrasonic testing apparatus as an example, the ultrasonic testing apparatus is attached to the side wall of the wind box 01 when moving along the testing rail 2, the ultrasonic testing apparatus emits ultrasonic waves toward the inside of the wind box 01 at a certain position of the testing rail 2, and the dust deposition degree in the wind box 01 opposite to the position of the testing rail 2 can be determined according to the signal change characteristics in the period of ultrasonic wave reflection and reception.
Since the dust in the air box 01 may vary in the width direction of the air box 01 in addition to the height parameter, when the ultrasonic detector detects that the dust is present at a certain height of the detection rail 2, the specific dust level in the air box 01 at the height can be further judged according to the specific variation trend of the ultrasonic signal characteristic.
The ash removing plate 1 adopted by the present invention may include an ash removing plate fixing layer 11 and an ash removing plate moving layer 12 which are overlapped up and down, and thus, the ash removing holes include an upper ash removing hole 111 provided in the ash removing plate fixing layer 11 and a lower ash removing hole 121 provided in the ash removing plate moving layer 12.
Wherein, the ash removing plate fixed layer 11 is fixed in the air box 01, and the ash removing plate movable layer 12 is connected in a sliding way along the surface of the ash removing plate fixed layer 11.
The upper dust removing holes 111 of the dust removing plate active layer 12 can be arranged in a vertical and horizontal matrix, and the shape of the upper dust removing holes 111 is not limited to a specific shape; the diameter of the single upper ash removing hole 111 can be set to any value of 1-5 cm, and can be specifically adjusted according to coal quality and ash quality. The soot-removing plate-fixing layer 11 may be perforated with the same diameter and the same rule.
When the dust is not removed, the upper dust removing holes 111 of the dust removing plate movable layer 12 and the lower dust removing holes 121 of the dust removing plate fixed layer 11 are completely staggered, the air box cavity above the dust removing plate 1 and the air box cavity below the dust removing plate 1 are not communicated, the dust removing plate is in a sealed state, and air and dust can not pass through the air box cavity.
When the dust removing machine works, the movable layer 12 of the dust removing plate moves for a distance relative to one end of the fixed layer 11 of the dust removing plate, so that the upper dust removing hole 111 of the movable layer 12 of the dust removing plate and the lower dust removing hole 121 of the fixed layer 11 of the dust removing plate partially coincide or completely coincide, and deposited dust falls under the action of gravity. It can be seen that for any one of the dust removing plates 1, the diameter of the dust removing hole is actually the area of the overlapping portion of the upper dust removing hole 111 and the lower dust removing hole 121.
The ash removing plate fixing layer 11 and the ash removing plate moving layer 12 can be made of steel plates.
In order to avoid the thermal deformation of the dust removing plate 1 and further lead to poor sealing, the dust removing plate 1 is blown up and down or the dust removing plate fixing layer 11 and the dust removing plate moving layer 12 are not smooth in sliding, and further, the dust removing plate fixing layer 11 and the dust removing plate moving layer 12 are designed by adopting thermal deformation-proof and wear-proof materials. For example, the ash removing plate fixing layer 11 is made of common carbon steel plate, and the ash removing plate moving layer 12 is made of wear-resistant PBI plastic or ceramic composite steel plate, so that close adhesion between layers is ensured, and sliding friction force is small.
Of course, the ash removing plate fixing layer 11 and the ash removing plate moving layer 12 can be made of ceramic steel plate composite materials with low manufacturing cost.
As for the sliding connection of the movable layer 12 and the fixed layer 11, the horizontal reciprocating motion of the telescopic rod 8 and the telescopic rod driving device can be used.
The telescopic rod driving device can be fixed on the outer side of the air box 01, and the telescopic rod 8 is inserted into the through hole in the side wall of the air box and moves in the through hole in a telescopic mode, so that the movable layer 12 and the fixed layer 11 of the ash removing plate can slide relatively. The telescopic rod 8 penetrates through the through hole and is sealed.
On the basis of the above embodiment, the side surface of the movable layer 12 of the ash removing plate is provided with a plurality of guide blocks 122 for guiding and positioning when the movable layer 12 of the ash removing plate slides.
The boiler air box dust deposition and removal device further comprises a controller, and the controller is connected to the telescopic rod driving device and the detector 3 respectively. When the accumulated ash height is greater than the preset height, the controller drives the ash removing plate movable layer 12 to move to the ash removing hole for communication through the telescopic rod driving device; when the deposition height is not more than the preset height, the controller drives the movable layer 12 of the ash removal plate to move to the ash removal hole for blocking through the telescopic rod driving device.
Further, the dust removing plate 1 further comprises a first protective net 13 fixed above the dust removing plate fixing layer 11 in parallel and a second protective net 14 installed below the dust removing plate movable layer 12 in parallel.
The first protection net 13 and the second protection net 14 are both high-strength steel wire meshes.
The first protective net 13 is used for preventing foreign matters with larger sizes from entering the dust removing holes, so that the dust removing holes are blocked and cannot work. The first protection net 13 and the second protection net 14 also prevent the ash remover from injuring a person when the operator enters the air box 01 to clean foreign matters on the first protection net 13.
The boiler wind box dust deposition and removal device provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a boiler bellows deposition ash handling equipment which characterized in that includes:
an ash removal plate (1) arranged along the lower part of the same-layer combustor (02) in the air box (01); the ash removing plate (1) is provided with an ash removing hole which is adjustable in on-off and used for allowing dust to fall;
the detection track (2) is used for being attached to the side wall of the air box (01) and respectively extends along the length direction and the thickness direction of the ash removal plate (1);
a detector (3) for detecting the height of accumulated ash on the upper surface of the ash removing plate (1) is connected in the detection track (2) in a sliding manner; the ash removing holes are communicated when the detector (3) acquires that the ash deposition height is greater than a preset height;
and an ash collecting device which is used for collecting and discharging the dust falling from the ash removing holes is arranged below the ash removing plate (1) at the bottommost layer of the air box (01).
2. The boiler windbox ash deposition and removal device according to claim 1,
the ash removing plate (1) comprises a plurality of plates; the ash removing plates (1) are arranged below the burners (02) at intervals;
the detection track (2) comprises a plurality of groups; the multiple groups of detection tracks (2) are respectively arranged corresponding to the multiple ash removal plates (1).
3. The boiler windbox ash deposition and removal device according to claim 2, wherein any one of the sets of detection rails (2) comprises a horizontal detection rail (21) disposed horizontally and a plurality of longitudinal detection rails (22) vertically connected to the horizontal detection rail (21);
all the longitudinal detection tracks (22) are arranged between adjacent burners (02) on the same layer at intervals.
4. The boiler windbox ash deposition and removal device according to claim 2, wherein one detector (3) is slidably connected to any one group of the detection rails (2), or all the detection rails (2) are communicated.
5. The boiler windbox ash deposition and removal device according to claim 1, wherein any one of the ash removal plates (1) forms a sealed chamber with the top surface of the windbox (01) when the ash removal hole is blocked.
6. The boiler wind box ash deposition and removal device according to claim 1, wherein the ash collection device comprises an ash collection hopper (4) with a hopper opening communicated with the bottom of the wind box (01) and an ash dropping pipe (5) communicated with a hopper tail of the ash collection hopper (4);
the ash collecting hopper (4) is connected with a vibrator (6);
the ash falling pipe (5) is connected with an air lock (7).
7. Boiler windbox ash deposition and removal device according to claim 1, characterized in that the detector (3) is embodied as an ultrasonic detector or an X-ray meter.
8. The boiler windbox ash deposition and removal device according to any one of claims 1 to 7, wherein the ash removal plate (1) comprises an ash removal plate fixed layer (11) and an ash removal plate movable layer (12) which are arranged in an up-and-down overlapping manner; the movable ash removing plate layer (12) is connected with the fixed ash removing plate layer (11) in a sliding mode along the plate surface of the ash removing plate layer;
the ash removing holes comprise upper ash removing holes (111) arranged on the ash removing plate fixing layer (11) and lower ash removing holes (121) arranged on the ash removing plate moving layer (12);
the dust removing holes are blocked when all the upper dust removing holes (111) and all the lower dust removing holes (121) are staggered, and are communicated when all the upper dust removing holes (111) and all the lower dust removing holes (121) are partially aligned and fully aligned.
9. The boiler windbox ash deposition and removal device according to claim 8, wherein the ash removal plate (1) further comprises a first protective net (13) fixed in parallel above the ash removal plate fixed layer (11) and a second protective net (14) installed in parallel below the ash removal plate movable layer (12).
10. The boiler windbox ash deposition and removal device according to claim 8, wherein the movable layer (12) of the ash removal plate is connected with a telescopic rod (8) and a telescopic rod driving device which horizontally reciprocate; the telescopic rod driving device and the detector (3) are both connected to a controller; the controller is in when deposition height is greater than and predetermines the height through telescopic link drive arrangement drives the dust removal board movable layer (12) remove extremely the ash hole intercommunication when deposition height is not more than and predetermines the height through telescopic link drive arrangement drives dust removal board movable layer (12) remove extremely the ash hole is stifled disconnected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010461946.3A CN111473348A (en) | 2020-05-27 | 2020-05-27 | Boiler bellows deposition ash handling equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010461946.3A CN111473348A (en) | 2020-05-27 | 2020-05-27 | Boiler bellows deposition ash handling equipment |
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| CN111473348A true CN111473348A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010461946.3A Pending CN111473348A (en) | 2020-05-27 | 2020-05-27 | Boiler bellows deposition ash handling equipment |
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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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| CN202709168U (en) * | 2012-07-11 | 2013-01-30 | 东方电气集团东方锅炉股份有限公司 | Pulverized coal boiler bellows with automatic ash discharging function |
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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 |
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