A boiler wind box dust removal device

Abstract

The present invention discloses a boiler bellows dust removal device, comprising a dust removal plate arranged below the burner on the same layer in the bellows; the dust removal plate has a dust removal hole that can be adjusted on and off for dust to fall; a detection track arranged to fit the side wall of the bellows and extending along the length direction and thickness direction of the dust removal plate; a detector for detecting the dust accumulation height on the upper surface of the dust removal plate is slidably connected in the detection track; the dust removal hole is connected when the detector obtains that the dust accumulation height is greater than a preset height; an ash collecting device for collecting and discharging dust falling from the ash removal hole is provided below the dust removal plate at the bottom layer of the bellows. The boiler bellows dust removal device uses the ash removal hole to connect and disconnect the bellows cavity above the ash removal plate with the ash collecting device, ensuring that the boiler bellows dust removal device has a large dust removal area during the dust removal operation, and also avoiding increasing the ventilation resistance of the secondary air, and has the characteristics of high reliability, low energy consumption and strong feasibility.

Description

Technical Field

[0001] The invention relates to the field of boilers, and in particular to a boiler wind box dust accumulation and dust removal device. Background Art

[0002] A coal-fired boiler is a thermal device that uses the heat energy released by the combustion of pulverized coal to heat the working medium water to steam of a certain parameter. The air required for the combustion of pulverized coal in the furnace enters the furnace through the secondary air bellows. During actual operation, the fly ash formed by the combustion of pulverized coal will be partially deposited in the heat storage body covered with corrugated plates in the rotary air preheater, and the secondary air will carry the fly ash attached and deposited here into the bellows when it flows through the heat storage body. As the circulation area of ​​the secondary air in the bellows increases, the wind speed decreases, resulting in a decrease in the secondary air's ability to carry fly ash, and part of the fly ash is deposited in the bellows.

[0003] After a coal-fired boiler has been running for a long time, fly ash accumulates seriously in the bellows, causing blockage of the bellows channel and the internal and external secondary air nozzles, which in turn causes the connecting rods, blades and other structures to become stuck, the ventilation resistance to increase, the air volume distribution of each nozzle on the same layer to be uneven, and the circumferential air intake of a single nozzle to be uneven, causing problems such as boiler eccentric burning, coking, nozzle burning, increased carbon monoxide, nitrogen oxides, fly ash, and reduced unit efficiency.

[0004] Existing ash removal technologies include compressed air power, rotary scraper ash removal, and solenoid valves and stop valves combined with ash hoppers. The former ash removal method has high energy consumption, low efficiency, and a large ash removal dead zone; since it is impossible to detect the degree of ash accumulation and whether there is ash accumulation, the ash removal operation is blind, which further increases energy consumption. The latter is also unable to judge the degree of ash accumulation, and the ash removal operation is blind; the solenoid valve and stop valve have a harsh working environment in a high temperature and high dust environment, are easy to get stuck, and have low reliability. In addition, for the latter, due to the large size of the ash hopper, it is generally only installed in the bottom burner bellows, and cannot be installed in the middle and upper bellows, affecting the ash removal effect in various places in the bellows. Although it can be installed in the bottom, middle, and upper bellows respectively, the small-sized ash hopper with an air lock reduces the ventilation area of ​​the bellows, which increases the resistance to secondary air flow, is not conducive to the flow of secondary air, and thus exacerbates the problem of fly ash deposition in the bellows. Summary of the invention

[0005] The object of the present invention is to provide a boiler wind box dust removal device which has the characteristics of high reliability, low energy consumption, strong feasibility and the like in dust removal operations.

[0006] To achieve the above object, the present invention provides a boiler wind box dust accumulation and dust removal device, comprising:

[0007] A dust removal plate arranged below the burners on the same layer in the wind box; the dust removal plate has dust removal holes that can be adjusted on and off for dust to fall;

[0008] A detection track is arranged to be attached to the side wall of the wind box and extends along the length direction and thickness direction of the dust removal plate respectively;

[0009] A detector for detecting the dust accumulation height on the upper surface of the dust removal plate is slidably connected in the detection track; the dust removal hole is connected when the dust accumulation height obtained by the detector is greater than a preset height;

[0010] An ash collecting device for collecting and discharging dust dropped from the ash removing holes is provided below the ash removing plate at the bottom layer of the wind box.

[0011] Preferably, the ash removal plates include a plurality of plates; the plurality of ash removal plates are arranged at intervals below the burners of each layer;

[0012] The detection tracks include a plurality of groups; the plurality of groups of detection tracks are respectively arranged corresponding to a plurality of dust removal plates.

[0013] Preferably, any group of the detection tracks comprises a horizontally arranged transverse detection track and a plurality of longitudinal detection tracks vertically connected to the transverse detection track;

[0014] All of the longitudinal detection rails are arranged at intervals between adjacent burners on the same layer.

[0015] Preferably, any group of the detection tracks is slidably connected to one of the detectors, or all of the detection tracks are connected.

[0016] Preferably, any one of the ash removal plates forms a sealed cavity with the top surface of the wind box when the ash removal hole is blocked.

[0017] Preferably, the ash collecting device comprises an ash collecting hopper whose hopper opening is connected to the bottom of the wind box and an ash dropping pipe connected to the hopper tail of the ash collecting hopper;

[0018] The ash collecting hopper is connected with a rapper;

[0019] The ash dropping pipe is connected with an air lock.

[0020] Preferably, the detector is an ultrasonic detector or an X-ray detector.

[0021] Preferably, the dust removal board comprises a dust removal board fixed layer and a dust removal board movable layer which are arranged overlapping each other; the dust removal board movable layer is slidably connected along the board surface of the dust removal board fixed layer;

[0022] The ash removal holes include an upper ash removal hole provided on the fixed layer of the ash removal plate and a lower ash removal hole provided on the movable layer of the ash removal plate;

[0023] The ash removal holes are blocked when all the upper ash removal holes and all the lower ash removal holes are staggered, and are connected when all the upper ash removal holes and all the lower ash removal holes are partially aligned or fully aligned.

[0024] Preferably, the dust removal board further comprises a first protection net fixed parallel to the upper part of the fixed layer of the dust removal board and a second protection net installed parallel to the lower part of the movable layer of the dust removal board.

[0025] Preferably, the movable layer of the ash removing plate is connected with a telescopic rod and a telescopic rod driving device for horizontal reciprocating motion; the telescopic rod driving device and the detector are both connected to a controller; when the dust accumulation height is greater than a preset height, the controller drives the movable layer of the ash removing plate to move to the ash removal hole for connection through the telescopic rod driving device; when the dust accumulation height is not greater than a preset height, the controller drives the movable layer of the ash removing plate to move to the ash removal hole for blocking through the telescopic rod driving device.

[0026] Compared with the above-mentioned background technology, the boiler bellows ash accumulation and ash removal device provided by the present invention includes an ash removal plate arranged in the bellows and having ash removal holes, a detection track arranged in contact with the side wall of the bellows, a detector sliding along the detection track, and an ash collecting device arranged at the bottom of the bellows and connected to the bellows.

[0027] The ash removal plate is set below the burner on the same layer in the wind box. The ash removal hole of the ash removal plate has two states: connected and blocked. When the ash removal hole is in the connected state, the wind box cavity above the ash removal plate is connected to the ash collection device; when the ash removal hole is in the blocked state, the wind box cavity above the ash removal plate is disconnected from the ash collection device.

[0028] The detection track extends along the length direction and the thickness direction of the dust removal plate respectively, and is used for allowing the detector to generate a lateral displacement between multiple burners on the same layer and a longitudinal displacement on one side of any burner.

[0029] The detector is used to detect the ash accumulation height at any burner when a longitudinal displacement occurs on one side of the burner, and is used to change the detection position when a lateral displacement occurs between multiple burners on the same side. When the detector obtains that the ash accumulation height is greater than the preset height, the ash removal hole is connected. The ash collection device is arranged below the ash removal plate at the bottom layer of the wind box and is connected to the wind box to collect and discharge the dust falling from the ash removal hole.

[0030] The boiler bellows ash accumulation and ash removal device provided by the present invention detects the ash accumulation state in the bellows through a detection track and a detector, and then adjusts the on-off state of the ash removal hole according to the detection result, so that when the ash accumulation height is greater than a preset height, the bellows cavity above the ash removal plate is connected with the ash collecting device, so that the ash accumulation falls into the ash collecting device from the ash removal hole and is discharged; and when the ash accumulation height is not greater than the preset height or the bellows is relatively clean, the bellows cavity above the ash removal plate is isolated from the ash collecting device, so that the ash removal operation is stopped.

[0031] The above-mentioned boiler bellows ash accumulation and ash removal device uses an ash removal plate installed below the combustion layer of the same layer, and utilizes the ash removal holes to realize the connection and disconnection between the bellows cavity above the ash removal plate and the ash collecting device, which not only ensures that the boiler bellows ash accumulation and ash removal device has a larger ash removal area during the ash removal operation, but also avoids increasing the ventilation resistance of the secondary air. It has the characteristics of high reliability, low energy consumption and strong feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the assembly of a boiler wind box dust accumulation and removal device, a wind box, and a burner provided in an embodiment of the present invention;

[0034] Figure 2 for Figure 1 Side view of

[0035] Figure 3 A schematic diagram of the structure of a dust removal plate provided in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the dust removal plate provided by an embodiment of the present invention in another direction.

[0037] Among them, 01-bellows, 02-burner, 1-ash removal plate, 11-ash removal plate fixed layer, 111-upper ash removal hole, 12-ash removal plate movable layer, 121-lower ash removal hole, 122-guide block, 13-first protective net, 14-second protective net, 2-detection track, 21-horizontal detection track, 22-longitudinal detection track, 3-detector, 4-ash collecting hopper, 5-ash dropping pipe, 6-rapper, 7-air lock, 8-telescopic rod. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of the assembly of a boiler wind box dust accumulation and removal device, a wind box, and a burner provided in an embodiment of the present invention; Figure 2 for Figure 1 Side view of Figure 3 A schematic diagram of the structure of a dust removal plate provided in an embodiment of the present invention; Figure 4 A schematic diagram of the dust removal plate provided by the embodiment of the present invention in another direction

[0041] The present invention provides a boiler bellows ash accumulation and ash removal device, comprising an ash removal plate 1 arranged in the bellows 01, a detection track 2 arranged in contact with the side wall of the bellows 01, a detector 3 sliding along the detection track 2, and an ash collecting device arranged at the bottom of the bellows 01 and connected to the bellows 01.

[0042] The ash removal plate 1 is arranged below the burner 02 on the same layer in the wind box 01. The ash removal plate 1 can be arranged only below the burner 02 on the bottom layer in the wind box 01, that is, arranged in the bottom wind box, or the ash removal plates 1 can be arranged below the burners 02 on multiple layers. For the ash removal plates 1 under the burners 02 on the same layer, the ash removal plates 1 can be arranged in the key areas of ash accumulation, or they can be spread over the cross section of the wind box 01.

[0043] The dust removal plate 1 has a dust removal hole for dust to fall. The dust removal hole has two states: connected and blocked. When the dust removal hole is in the connected state, the air box cavity above the dust removal plate 1 is connected to the dust collection device; when the dust removal hole is in the blocked state, the air box cavity above the dust removal plate 1 is isolated from the dust collection device.

[0044] The detection track 2 is arranged in close contact with the side wall of the wind box 01 and extends respectively along the length direction and the thickness direction of the dust removal plate 1. A detector 3 is slidably connected in the detection track 2. When the detector 3 is longitudinally displaced along the detection track 2 on one side of any burner 02, the detector 3 is used to detect the dust accumulation height at the burner 02. When the detector 3 is transversely displaced along the detection track 2 between multiple burners 02 on the same layer, the detector 3 is used to move to different burners 02, and then respectively detect the dust accumulation height at different burners 02.

[0045] When the detector 3 obtains that the dust accumulation height is greater than the preset height, the ash removal hole is connected, so that the bellows cavity above the ash removal plate 1 is connected to the ash collecting device. Since the ash collecting device is provided below the ash removal plate 1 at the bottom layer of the bellows 01, except for some dust being brought into the furnace by the secondary air during the falling process, the rest of the dust falls to the bottom of the bellows 01 and enters the ash collecting device, and is finally sent to the furnace through the ash collecting device. As for the destination ratio of the above two parts of dust, it is related to the diameter of the ash removal hole. When the aperture of the ash removal hole is small, most of the accumulated ash will be blown into the furnace through the nozzle by the secondary air. When the aperture of the ash removal hole is large, most of the accumulated ash will fall into the ash collecting device and then enter the furnace.

[0046] In summary, the detector 3 patrols and detects along the detection track 2. When it detects that the bellows 01 is relatively clean, that is, the dust accumulation height is not greater than the preset height, the dust removal plate 1 and the dust collection device do not work; when the detector 3 detects that the dust accumulation height reaches the set condition, that is, it is greater than the preset height, the dust removal plate 1 and the dust collection device start to work until the condition for stopping the dust removal operation is triggered, and the dust removal plate 1 and the dust collection device stop working.

[0047] During the ash removal operation, the boiler bellows ash removal device provided by the present invention first detects the ash accumulation state in the bellows 01 through the detector 3, and then adjusts the on-off state of the ash removal hole according to the detection result, so that when the ash accumulation height is greater than the preset height, the bellows cavity above the ash removal plate 1 is connected with the ash collecting device, so that the accumulated ash falls into the ash collecting device from the ash removal hole and is discharged. Otherwise, the bellows cavity above the ash removal plate 1 and the ash collecting device are blocked, and the ash removal operation is stopped.

[0048] The boiler bellows ash accumulation and ash removal device utilizes an ash removal plate 1 with ash removal holes to connect and disconnect the bellows cavity above the ash removal plate 1 with the ash collecting device. When the ash removal holes are connected, the boiler bellows ash accumulation and ash removal device has a larger ash removal area while avoiding increasing the ventilation resistance of the secondary air. It has the characteristics of high reliability, low energy consumption and strong feasibility.

[0049] The boiler wind box ash accumulation and ash removal device provided by the present invention is further described below in conjunction with the accompanying drawings and implementation examples.

[0050] On the basis of the above-mentioned embodiment, in order to achieve a better ash removal effect, the boiler wind box ash accumulation and ash removal device includes a plurality of ash removal plates 1, and the plurality of ash removal plates 1 are arranged at intervals below each layer of burners 02.

[0051] Taking the example of a three-layer burner 02 in the wind box 01, the boiler wind box ash accumulation and ash removal device has three ash removal plates 1. The first ash removal plate 1 (hereinafter referred to as the first-layer ash removal plate 1) is arranged between the first-layer burner 02 and the second-layer burner 02. The first ash removal plate 1 can be distributed horizontally so as to be parallel to the first-layer burner 02; the second ash removal plate 1 (hereinafter referred to as the second-layer ash removal plate 1) is arranged between the second-layer burner 02 and the third-layer burner 02; the third ash removal plate 1 (hereinafter referred to as the third-layer ash removal plate 1) is arranged below the third-layer burner 02 and above the ash collecting device.

[0052] When the boiler wind box ash accumulation and ash removal device is working, the ash removal holes of the three ash removal plates 1 can be connected at the same time, so that the ash in the wind box 01 falls directly into the ash collecting device from top to bottom, or the ash removal holes of the three ash removal plates 1 can be connected in sequence, so that the ash in the wind box 01 falls layer by layer. In order to prevent too much ash from being deposited at the bottom of the wind box 01 at the same time, for the latter ash removal method, it is preferred to remove the ash in the lower layer, the middle layer, and the upper layer in sequence, and then remove the ash in the middle layer and the lower layer again.

[0053] Specifically, the ash removal of the lower layer, the middle layer, and the upper layer in sequence refers to first connecting the ash removal holes of the third-layer ash removal plate 1 so that the ash accumulated at the third-layer burner 02 falls into the ash collection device, and the ash removal holes of the third-layer ash removal plate 1 are blocked after the ash removal is completed; then connecting the ash removal holes of the second-layer ash removal plate 1 so that the ash accumulated at the second-layer burner 02 falls to the third-layer ash removal plate 1, and the ash removal holes of the second-layer ash removal plate 1 are blocked after the ash removal is completed; then connecting the ash removal holes of the first-layer ash removal plate 1 so that the ash accumulated at the first-layer burner falls to the second-layer ash removal plate 1. In the above operation, the ash accumulated at the third-layer burner 02 falls into the ash collection device, the ash accumulated at the second-layer burner 02 falls to the third-layer ash removal plate 1, and the ash accumulated at the first-layer burner 02 falls to the second-layer ash removal plate 1.

[0054] The middle and lower layers are further deashed by connecting the deashing holes of the second deashing plate 1 to allow the ash accumulated on the second burner 02 to fall to the third deashing plate 1. After the deashing is completed, the deashing holes of the second deashing plate 1 are blocked and connected to the deashing holes of the third deashing plate 1 to allow the ash accumulated on the third burner 02 to fall into the ash collecting device. In the above operation, the ash accumulated on the second burner 02 falls to the third deashing plate 1, and finally the third deashing plate 1 completely removes the dust and ash accumulated from the wind box 01.

[0055] Obviously, in addition to the specific deashing method of removing ash from the lower layer, the middle layer, and the upper layer in sequence, and then removing ash from the middle layer and the lower layer again, it is also possible to remove ash from the lower layer, the middle layer, and the upper layer in sequence, and then remove ash from the lower layer and the middle layer again, and finally remove ash from the lower layer. Compared with the former, any deashing plate 1 always accumulates only one layer of ash at the burner 02.

[0056] In order to improve the effect of the detector 3 on the dust accumulation detection at various positions in the wind box 01, the boiler wind box dust accumulation removal device provided by the present invention includes multiple groups of detection tracks 2, and the multiple groups of detection tracks 2 are respectively set corresponding to multiple dust removal plates 1. In simple terms, one dust removal plate 1 corresponds to one group of detection tracks 2, and when the detector 3 slides along the group of detection tracks 2, the detector 3 generates lateral and longitudinal displacements relative to the burner 02 on the same layer where the dust removal plate 1 is located, ensuring that each burner 02 is within the detection range of the detector 3.

[0057] For any of the above detection tracks 2, please refer to Figure 1 , may include a horizontally arranged transverse detection track 21 and a plurality of longitudinal detection tracks 22 vertically connected to the transverse detection track 21, and the plurality of longitudinal detection tracks 22 are arranged at intervals between adjacent burners 02 on the same layer.

[0058] When the boiler is running, the area between two adjacent burners 02 on the same layer in the wind box 01 is where the most serious ash accumulation occurs. Therefore, the longitudinal detection track 22 is vertically installed between the aforementioned adjacent burners 02 and is connected to the transverse detection track 21 to realize ash accumulation detection at the burners 02 on the same layer.

[0059] On the basis of the above embodiment, any group of detection rails 2 can be slidably connected to a detector 3, and multiple groups of detection rails 2 are respectively connected to multiple detectors 3. In addition, all detection rails 2 can be connected, so that the boiler wind box dust removal device uses one detector 3 to detect the dust accumulation condition in the entire wind box 01.

[0060] For better technical effect, any ash removal plate 1 is arranged along the cross section of the wind box 01 , so as to form a sealed cavity with the top surface of the wind box 01 when all the ash removal holes of the ash removal plate 1 are blocked.

[0061] The ash collecting device used in the present invention may include an ash collecting hopper 4 , an ash dropping pipe 5 , a rapper 6 and an air lock 7 .

[0062] The mouth of the ash hopper 4 is connected to the bottom of the wind box 01, and the tail of the ash hopper 4 is connected to the ash falling pipe 5. The ash hopper 4 is connected to a rapper 6 for removing the accumulated ash attached to the inner wall of the ash hopper 4. The ash falling pipe 5 is connected to an air lock 7 for preventing secondary air from entering the furnace, but does not prevent the falling accumulated ash from entering the furnace.

[0063] The detector 3 can be controlled by a program to realize a timed automatic patrol detection along the detection track 2. When the detector 3 detects that the ash accumulation height is greater than a preset height, such as the maximum ash accumulation height, the ash remover and the ash collection device are started to remove the ash. When the ash accumulation height drops below the standard ash accumulation height, the ash remover stops working. Obviously, the maximum ash accumulation height is greater than the standard ash accumulation height. When the ash accumulation exceeds the maximum ash accumulation height, it will affect the normal operation of the boiler, while the ash accumulation between the maximum ash accumulation height and the standard ash accumulation height has little effect on the operation of the boiler and can be almost ignored.

[0064] The detector 3 can be specifically configured as an ultrasonic detector or an X-ray device. Taking the ultrasonic detector as an example, when the ultrasonic detector moves along the detection track 2, it is close to the side wall of the bellows 01. The ultrasonic detector emits ultrasonic waves toward the inside of the bellows 01 at a certain point of the detection track 2. According to the signal change characteristics of the aforementioned ultrasonic reflection and reception cycle, it can be determined whether dust is accumulated inside the bellows 01 corresponding to the detection track 2 and the degree of dust accumulation.

[0065] Since the dust accumulation in the bellows 01 may change in the width direction of the bellows 01 in addition to the height parameter, when the ultrasonic detector detects the presence of dust accumulation at a certain height of the detection track 2, the specific degree of dust accumulation in the bellows 01 at this height can be further determined by the specific change trend of the ultrasonic signal characteristics.

[0066] The dust removal board 1 used in the present invention may include a dust removal board fixed layer 11 and a dust removal board movable layer 12 which are overlapped with each other. Therefore, the dust removal holes include an upper dust removal hole 111 arranged on the dust removal board fixed layer 11 and a lower dust removal hole 121 arranged on the dust removal board movable layer 12.

[0067] The dust removal board fixed layer 11 is fixed in the wind box 01 , and the dust removal board movable layer 12 is slidably connected along the board surface of the dust removal board fixed layer 11 .

[0068] The upper ash removal holes 111 of the ash removal plate movable layer 12 can be arranged in a vertical and horizontal matrix, and the shape of the upper ash removal holes 111 is not limited to a specific shape; the diameter of a single upper ash removal hole 111 can be set to any value of 1 to 5 cm, which can be adjusted according to the coal quality and ash quality. The fixed layer 11 of the ash removal plate can be punched with the same diameter and the same pattern.

[0069] When not removing dust, the upper dust removal holes 111 of the dust removal plate movable layer 12 and the lower dust removal holes 121 of the dust removal plate fixed layer 11 are completely staggered, the bellows cavity above the dust removal plate 1 and the bellows cavity below the dust removal plate 1 are not connected and are in a sealed state, and wind and dust cannot pass through.

[0070] During the ash removal operation, the ash removal plate movable layer 12 is translated by one end distance relative to the ash removal plate fixed layer 11, so that the upper ash removal hole 111 of the ash removal plate movable layer 12 and the lower ash removal hole 121 of the ash removal plate fixed layer 11 partially overlap or completely overlap, and the accumulated ash falls under the action of gravity. It can be seen that for any ash removal plate 1, the diameter of the ash removal hole is actually the area of ​​the overlapped portion of the upper ash removal hole 111 and the lower ash removal hole 121.

[0071] The dust removal plate fixed layer 11 and the dust removal plate movable layer 12 can both be made of steel plates.

[0072] In order to prevent the dust removal plate 1 from being deformed by heat, which may lead to poor sealing, wind blowing up and down the dust removal plate 1, or poor sliding of the dust removal plate fixed layer 11 and the dust removal plate movable layer 12, the dust removal plate fixed layer 11 and the dust removal plate movable layer 12 are further designed with heat-resistant deformation and wear-resistant materials. For example, the dust removal plate fixed layer 11 is made of ordinary carbon steel plate, and the dust removal plate movable layer 12 is made of wear-resistant PBI plastic or ceramic composite steel plate to ensure close fit between the layers and low sliding friction.

[0073] Of course, the dust removal plate fixed layer 11 and the dust removal plate movable layer 12 may also be made of ceramic steel plate composite material with low manufacturing cost.

[0074] As for the sliding connection between the dust removing plate movable layer 12 and the dust removing plate fixed layer 11, it can be realized specifically by means of a telescopic rod 8 and a telescopic rod driving device that moves back and forth horizontally.

[0075] The telescopic rod driving device can be fixed to the outside of the bellows 01, and the telescopic rod 8 is inserted into the through hole of the side wall of the bellows, and telescopically moves in the through hole to achieve relative sliding of the dust removal plate movable layer 12 and the dust removal plate fixed layer 11. The telescopic rod 8 is sealed at the through hole.

[0076] On the basis of the above-mentioned embodiment, a plurality of guide blocks 122 are provided on the side of the dust removing plate movable layer 12 for guiding and positioning the dust removing plate movable layer 12 when it slides.

[0077] The boiler wind box ash accumulation and ash removal device also includes a controller, which is respectively connected to the telescopic rod driving device and the detector 3. When the ash accumulation height is greater than the preset height, the controller drives the ash removal plate movable layer 12 to move to the ash removal hole through the telescopic rod driving device; when the ash accumulation height is not greater than the preset height, the controller drives the ash removal plate movable layer 12 to move to the ash removal hole through the telescopic rod driving device.

[0078] Furthermore, the dust removal board 1 further comprises a first protection net 13 fixed in parallel above the dust removal board fixed layer 11 and a second protection net 14 installed in parallel below the dust removal board movable layer 12 .

[0079] The first protection net 13 and the second protection net 14 are both high-strength steel wire nets.

[0080] The first protection net 13 is used to prevent large foreign objects from entering the ash removal hole, which makes the ash removal hole stuck and unable to work. When the operator enters the wind box 01 to clean the foreign objects on the first protection net 13, the first protection net 13 and the second protection net 14 can also prevent the ash remover from hurting people.

[0081] The above is a detailed introduction to the boiler wind box ash accumulation and ash removal device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A boiler wind box dust removal device, characterized in that: include: A dust removal plate (1) is arranged below the burner (02) on the same layer in the wind box (01); the dust removal plate (1) has dust removal holes that can be adjusted in on and off and are used for dust to fall; A detection track (2) which is arranged to be attached to the side wall of the wind box (01) and extends along the length direction and thickness direction of the dust removal plate (1); A detector (3) for detecting the dust accumulation height on the upper surface of the dust removal plate (1) is slidably connected in the detection track (2); the dust removal hole is connected when the detector (3) detects that the dust accumulation height is greater than a preset height; An ash collecting device for collecting and discharging dust falling from the ash removing hole is provided below the ash removing plate (1) at the bottom layer of the wind box (01); The dust removal board (1) comprises a dust removal board fixed layer (11) and a dust removal board movable layer (12) which are arranged in an upper and lower overlapping manner; the dust removal board movable layer (12) is slidably connected along the board surface of the dust removal board fixed layer (11); The ash removal holes include an upper ash removal hole (111) provided on the fixed layer (11) of the ash removal plate and a lower ash removal hole (121) provided on the movable layer (12) of the ash removal plate; The ash removal holes are blocked when all the upper ash removal holes (111) and all the lower ash removal holes (121) are misaligned, and are connected when all the upper ash removal holes (111) and all the lower ash removal holes (121) are partially aligned or fully aligned; The dust removal plate movable layer (12) is connected to a telescopic rod (8) capable of horizontal reciprocating motion and a telescopic rod driving device; The telescopic rod driving device and the detector (3) are both connected to a controller; the telescopic rod driving device is fixed to the outside of the bellows (01); the telescopic rod (8) is inserted into a through hole on the side wall of the bellows (01) and telescopically moves in the through hole so that the dust removal plate movable layer (12) and the dust removal plate fixed layer (11) slide relative to each other; the telescopic rod (8) is sealed at the point where it penetrates into the through hole; a plurality of guide blocks (122) are provided on the side of the dust removal plate movable layer (12) for guiding and positioning the dust removal plate movable layer (12) when it slides; The controller drives the movable layer (12) of the ash removal plate to move to the ash removal hole for connection through the telescopic rod driving device when the ash accumulation height is greater than a preset height, and drives the movable layer (12) of the ash removal plate to move to the ash removal hole for blocking when the ash accumulation height is not greater than the preset height through the telescopic rod driving device.

2. The boiler wind box dust accumulation and dust removal device according to claim 1 is characterized in that: The ash removal plates (1) include a plurality of ash removal plates (1); the plurality of ash removal plates (1) are arranged at intervals below the burners (02) at each layer; The detection tracks (2) include a plurality of groups; the plurality of groups of detection tracks (2) are respectively arranged corresponding to a plurality of dust removal plates (1).

3. The boiler wind box dust accumulation and dust removal device according to claim 2 is characterized in that: Any group of the detection tracks (2) comprises a horizontally arranged transverse detection track (21) and a plurality of longitudinal detection tracks (22) vertically connected to the transverse detection track (21); All of the longitudinal detection rails (22) are arranged at intervals between adjacent burners (02) on the same layer.

4. The boiler wind box dust accumulation and dust removal device according to claim 2, characterized in that: Any group of the detection tracks (2) is slidably connected to one of the detectors (3), or all of the detection tracks (2) are connected.

5. The boiler wind box dust accumulation and dust removal device according to claim 1, characterized in that: When the ash removal hole is blocked, any one of the ash removal plates (1) forms a sealed cavity with the top surface of the wind box (01).

6. The boiler wind box dust accumulation and dust removal device according to claim 1, characterized in that: The ash collecting device comprises an ash collecting hopper (4) whose hopper opening is connected to the bottom of the wind box (01) and an ash dropping pipe (5) connected to the hopper tail of the ash collecting hopper (4); The ash collecting hopper (4) is connected to a rapper (6); The ash dropping pipe (5) is connected to an air lock (7).

7. The boiler wind box dust accumulation and dust removal device according to claim 1, characterized in that: The detector (3) is specifically an ultrasonic detector or an X-ray detector.

8. The boiler wind box dust accumulation and dust removal device according to claim 1, characterized in that: The dust removal board (1) further comprises a first protection net (13) fixed in parallel above the dust removal board fixed layer (11) and a second protection net (14) installed in parallel below the dust removal board movable layer (12).

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