CN219559028U - Ash blocking device of denitration system - Google Patents
Ash blocking device of denitration system Download PDFInfo
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- CN219559028U CN219559028U CN202320384882.0U CN202320384882U CN219559028U CN 219559028 U CN219559028 U CN 219559028U CN 202320384882 U CN202320384882 U CN 202320384882U CN 219559028 U CN219559028 U CN 219559028U
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- flue
- reversing
- ash
- ash blocking
- flue gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The utility model discloses an ash blocking device of a denitration system, which comprises a flue main body, wherein an ash blocking mechanism is arranged in a reversing flue, an ash cleaning component is arranged in a descending flue, and the ash blocking mechanism comprises an ash blocking plate, a plurality of air deflectors and a fan; the utility model has simple structure and reasonable design, dust-containing flue gas gathers small dust particles at the corners of the flue due to self-gravity and kinetic energy loss, dust accumulation is serious when the flow rate of the flue gas is low, the blower is started to blow the inside of the reversing flue after the angle of the air deflector is adjusted, compressed air enters the filter screen along the angle of the air deflector to filter out large-particle impurities and blow the dust-containing flue gas outwards, the compressed air provides power for the dust-containing flue gas, the flue gas is ensured to pass through the reversing flue at a higher speed, the kinetic energy can be provided for the flue gas flowing at a low speed through the dust blocking mechanism, the residence time of the flue gas at the corners of the flue body is reduced, and the dust particle accumulation is reduced.
Description
Technical Field
The utility model relates to the technical field of flue gas denitration, in particular to an ash blocking device of a denitration system.
Background
The denitration system is usually arranged behind a boiler economizer and in front of an air preheater, the dust concentration content in the flue gas in the area is high, the flue gas is a so-called high ash area, after the flue gas comes out of the boiler, the flue gas firstly enters the economizer and then enters a denitration reactor along a reversing flue and a vertical flue, the catalyst in the denitration reactor is generally arranged in a three-layer or four-layer design, and a rectifier is often arranged above the uppermost catalyst and is used for leveling the flue gas before entering the catalyst.
The design and arrangement of the flue from the reversing flue at the inlet of the denitration reactor to the catalyst inlet are generally compact and are more rapid, and a great amount of ash accumulation phenomenon is often caused at the corners of the reversing flue and the vertical flue when flue gas passes through the reversing flue, because the flue gas enters the flue, due to the loss of kinetic energy, the flue gas impacts the wall surface of the flue at the corners to cause ash to drop and gather in a great amount, the flue gas cannot be cleaned, and the dust is accumulated more and more long time.
Disclosure of Invention
The utility model aims to provide an ash blocking device of a denitration system, which is provided with an ash blocking mechanism, wherein after the angle of an air deflector is adjusted, a fan is started to purge the interior of a reversing flue, compressed air enters a filter screen along the angle of the air deflector to filter large particle impurities, and because dust-carrying flue gas can generate kinetic energy loss when entering a descending flue, the compressed air provides power for the dust-carrying flue gas, so that the flue gas can pass through the reversing flue at a higher speed, the ash blocking mechanism can provide kinetic energy for the flue gas flowing at a low speed, the residence time of the flue gas at the corner of a flue main body is reduced, and the ash accumulation is reduced.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the ash blocking device of the denitration system comprises a flue main body, wherein the flue main body comprises an ascending flue, a reversing flue and a descending flue, the ascending flue, the reversing flue and the descending flue are sequentially communicated with each other along the air inlet and the air exhaust of the flue main body, the ascending flue, the reversing flue and the descending flue form an inverted U-shaped structure, an ash blocking mechanism for providing kinetic energy for flue gas circulation is arranged in the reversing flue, and an ash cleaning component for cleaning dust and ash particles is arranged in the descending flue;
the ash blocking mechanism comprises:
the ash blocking plate is arranged at the upper end of the interior of the reversing flue, and a filter screen is arranged at one side of the interior of the ash blocking plate;
the air deflectors are arranged between the ash blocking plate and the reversing flue;
the fan is arranged at the upper end of the reversing flue, and the air outlet of the fan is arranged at the upper end of one side of the filter screen inside the reversing flue.
Preferably, the ash removal assembly includes:
the rectification grating is arranged at one side of the interior of the descending flue close to the reversing flue outlet;
the motor is arranged at one side of the descending flue, a screw rod is arranged at the output end of the motor in the descending flue, and a ball nut is arranged at the outer side of the screw rod;
the cleaning brush is arranged at the lower end of the ball nut, and the lower end of the cleaning brush is attached to the upper end of the rectifying grid.
Preferably, a rotating shaft for adjusting the angle is arranged in the middle of the air deflector, and the lower end of the rotating shaft is in meshed connection with a gear plate arranged on the side wall of the reversing flue through a rotating gear.
Preferably, the flue body is made of 6 mm thick Q345 steel plate.
Preferably, the inlet of the flue main body is provided with an ash blocking screen.
Compared with the prior art, the utility model has the beneficial effects that:
1. by arranging the ash blocking mechanism, after the angle of the air deflector is adjusted, a fan is started to sweep the inside of the reversing flue, compressed air enters the filter screen along the angle of the air deflector to filter out large particle impurities, and because the dust-carrying flue gas can generate kinetic energy loss when entering the descending flue, the compressed air provides power for the dust-carrying flue gas, so that the flue gas can pass through the reversing flue at a higher speed, the ash blocking mechanism can provide kinetic energy for the low-speed flowing flue gas, the residence time of the flue gas at the corner of the flue main body is reduced, and the ash particle accumulation is reduced;
2. through being provided with the deashing subassembly, starter motor drives the lead screw and rotates, drives the ball nut horizontal displacement in its outside when the lead screw rotates, and the cleaning brush that is located ball nut lower extreme is laminated with the rectification grid, and the cleaning brush is along displacement limit with the ash particle of rectification grid upper end clean get into the denitration reactor of lower extreme, will be because in the ash particle clearance entering rectification grid under the ash blocking mechanism play through the deashing subassembly, prevent that the ash particle from piling up between two grids.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the structure of the air deflector of the present utility model;
FIG. 3 is an enlarged schematic view of FIG. 1 at A;
fig. 4 is an enlarged schematic view at B in fig. 1.
In the figure: 1. a flue body; 11. a rising flue; 111. an inlet ash bucket; 12. a reversing flue; 121. a gear plate; 13. lowering the flue; 14. an ash blocking screen; 2. an ash blocking mechanism; 21. an ash blocking plate; 211. a filter screen; 22. a plurality of air deflectors; 221. a rotating shaft; 222. rotating the gear; 23. a blower; 3. an ash removal component; 31. a rectifying grille; 32. a motor; 321. a screw rod; 322. a ball nut; 33. a cleaning brush; 4. a catalyst layer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a number" is two or more, unless explicitly defined otherwise.
Referring to fig. 1-4, the ash blocking device of a denitration system provided by the utility model comprises a flue main body 1, wherein the flue main body 1 comprises an ascending flue 11, a reversing flue 12 and a descending flue 13, the ascending flue 11, the reversing flue 12 and the descending flue 13 are sequentially communicated with air inlet and air exhaust along the flue main body 1, the ascending flue 11, the reversing flue 12 and the descending flue 13 form an inverted U-shaped structure, an ash blocking mechanism 2 for providing kinetic energy for flue gas circulation is arranged in the reversing flue 12, an ash removing component 3 for cleaning ash particles is arranged in the descending flue 13, the ash blocking mechanism 2 comprises an ash blocking plate 21, a plurality of air deflectors 22 and a fan 23, the ash blocking plate 21 is fixed at the upper end in the reversing flue 12, a filter screen 211 is arranged on one side in the interior of the ash blocking plate 21, the plurality of air deflectors 22 are arranged between the ash blocking plate 21 and the reversing flue 12, the fan 23 is arranged at the upper end of the reversing flue 12, the air outlet of the fan 23 is arranged at the upper end of the reversing flue 12, which is positioned at one side of the filter screen 211, dust-containing flue gas is gathered at the corner where the reversing flue 12 and the descending flue 13 are connected due to self gravity and kinetic energy loss, dust accumulation is particularly serious when the flow rate of the flue gas is slow, the fan 23 is started to purge the interior of the reversing flue 12 after the angles of a plurality of air deflectors 22 are adjusted, compressed air enters the filter screen 211 along the angles of the plurality of air deflectors 22 to filter large particle impurities, kinetic energy loss occurs when the dust-carrying flue gas enters the descending flue 13, the compressed air provides power for the dust-carrying flue gas, the flue gas is ensured to pass through the reversing flue 12 at a higher speed, the flue gas flowing at a lower speed can be provided with kinetic energy through the ash blocking mechanism 2, the residence time of the flue gas at the corner of the flue body 1 is reduced, the ash particle accumulation is reduced.
The ash removal assembly 3 comprises a rectification grating 31, a motor 32 and a cleaning brush 33, wherein the rectification grating 31 is fixed at one side, close to the outlet of the reversing flue 12, of the inside of the descending flue 13, the motor 32 is arranged at one side of the descending flue 13, the output end of the motor 32 is connected with a screw rod 321 at the inner part of the descending flue 13, a ball nut 322 is arranged at the outer side of the screw rod 321, the cleaning brush 33 is fixed at the lower end of the ball nut 322, the lower end of the cleaning brush 33 is attached to the upper end of the rectification grating 31, when dust-containing flue gas enters the descending flue 13, as the ash blocking mechanism 2 can purge ash particles in a part of dust-containing flue gas between two gratings of the rectification grating 31, the part of ash particles need to be cleaned at fixed time, the motor 32 drives the screw rod 321 to rotate, the ball nut 322 at the outer side of the same time of the screw rod 321 is driven to horizontally displace, the cleaning brush 33 at the lower end of the ball nut 322 is attached to the rectification grating 31, the cleaning brush 33 is attached to the side of the cleaning brush 33, and the ash particles at the upper end of the rectification grating 31 enter a denitration reactor at the lower end, and the ash particles can be prevented from being accumulated between the two ash particles due to the ash blocking mechanism 2 entering the lower rectification grating 31 through the cleaning brush 3.
The catalyst layer 4 is installed at the lower end of the rectification grid 31 in the descending flue 13, and the flue gas is subjected to denitration reaction under the action of the catalyst layer 4.
The lower end of the rising flue 11 is fixed with an inlet ash bucket 111, so that dust with larger particles can be conveniently collected, and secondary blowing in the inlet ash bucket 111 is avoided.
The middle of the air deflector 22 is provided with a rotating shaft 221 for adjusting the angle, the lower end of the rotating shaft 221 is in meshed connection with a gear plate 121 arranged on the side wall of the reversing flue 12 through a welding rotating gear 222, and the rotating shaft 221 is rotated by manually pulling the gear plate 121, so that the angle of the air deflector 22 is adjusted to adapt to the flow direction of the air outlet of the fan 23.
The flue main body 1 is made of Q345 steel plate with the thickness of 6 mm, and has good corrosion resistance.
An ash blocking screen 14 is arranged at the inlet of the flue body 1, so that large particles in the flue gas can be conveniently intercepted outside the flue body 1.
The working principle of the utility model is as follows:
when the ash blocking device of the denitration system of the embodiment is used, the flue gas firstly passes through the ash blocking screen 14 to intercept large particles in the flue gas and enter the inlet ash bucket 111 outside, then passes through the rising flue 11 and the corner of the reversing flue 12 to enter the reversing flue 12, the circulation speed of the flue gas which is lost due to kinetic energy in the reversing flue 12 begins to decline, ash particle accumulation easily occurs at the corner of the reversing flue 12 and the corner of the descending flue 13, after the angle of the plurality of air deflectors 22 is adjusted, the blower 23 is started to sweep the inside of the reversing flue 12, compressed air enters the filter screen 211 along the angle of the plurality of air deflectors 22 to filter the large particle impurities, the compressed air provides power for the circulation of the flue gas, the flue gas is ensured to enter the descending flue 13 through the reversing flue 12 at a higher speed, the ash particle accumulation is reduced, the blower 23 blows the flue gas which is difficult to enter the rectifying grids 31 in a vertical direction due to inertia, ash particle accumulation is inevitably caused between the two grids of the rectifying grids 31, the dust particle accumulation 321 needs to be carried out on the rectifying grids 321, and the ball brush roller ball bearings 32 is driven by the ball bearings 321 to rotate to drive the ball bearings 33 to move to the rectifying nuts 33, and the ball bearings 33 are driven to rotate, and the ball bearings 33 are driven to move and move to the ball bearings 33 to move and move the dust particle brushes to the dust particles to the end to clean the ball bearings 33.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides an ash blocking device of denitration system, includes flue main part (1), its characterized in that: the flue main body (1) comprises an ascending flue (11), a reversing flue (12) and a descending flue (13), wherein the ascending flue (11), the reversing flue (12) and the descending flue (13) are sequentially communicated along the air inlet and air exhaust directions of the flue main body (1), the ascending flue (11), the reversing flue (12) and the descending flue (13) form an inverted U-shaped structure, an ash blocking mechanism (2) for providing kinetic energy for flue gas circulation is arranged in the reversing flue (12), and an ash cleaning component (3) for cleaning ash particles is arranged in the descending flue (13);
the ash blocking mechanism (2) comprises an ash blocking plate (21), a plurality of air deflectors (22) and a fan (23);
the ash blocking plate (21) is arranged at the upper end of the interior of the reversing flue (12), and a filter screen (211) is arranged at one side of the interior of the ash blocking plate (21);
the air deflectors (22) are arranged between the ash blocking plate (21) and the reversing flue (12);
the fan (23) is arranged at the upper end of the reversing flue (12), and an air outlet of the fan (23) is arranged at the upper end of one side of the filter screen (211) inside the reversing flue (12).
2. An ash blocking device for a denitration system according to claim 1, wherein: the ash cleaning component (3) comprises a rectifying grid (31), a motor (32) and a cleaning brush (33);
the rectification grid (31) is arranged at one side of the interior of the descending flue (13) close to the outlet of the reversing flue (12);
the motor (32) is arranged on one side of the descending flue (13), a screw rod (321) is arranged at the output end of the motor (32) in the descending flue (13), and a ball nut (322) is arranged on the outer side of the screw rod (321);
the cleaning brush (33) is arranged at the lower end of the ball nut (322), and the lower end of the cleaning brush (33) is attached to the upper end of the rectifying grid (31).
3. An ash blocking device for a denitration system according to claim 1, wherein: the inside of the descending flue (13) is provided with a catalyst layer (4) at the lower end of the rectification grid (31).
4. An ash blocking device for a denitration system according to claim 1, wherein: the lower end of the rising flue (11) is provided with an inlet ash bucket (111).
5. An ash blocking device for a denitration system according to claim 1, wherein: the middle of the plurality of air deflectors (22) is provided with a rotating shaft (221) for adjusting angles, and the lower end of the rotating shaft (221) is in meshed connection with a gear plate (121) arranged on the side wall of the reversing flue (12) through a rotating gear (222).
6. An ash blocking device for a denitration system according to claim 1, wherein: the flue body (1) is made of a Q345 steel plate with the thickness of 6 mm.
7. An ash blocking device for a denitration system according to claim 1, wherein: an ash blocking screen (14) is arranged at the inlet of the flue main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320384882.0U CN219559028U (en) | 2023-03-05 | 2023-03-05 | Ash blocking device of denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320384882.0U CN219559028U (en) | 2023-03-05 | 2023-03-05 | Ash blocking device of denitration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219559028U true CN219559028U (en) | 2023-08-22 |
Family
ID=87660051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320384882.0U Active CN219559028U (en) | 2023-03-05 | 2023-03-05 | Ash blocking device of denitration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219559028U (en) |
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2023
- 2023-03-05 CN CN202320384882.0U patent/CN219559028U/en active Active
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