CN114849472A - SCR flue gas treatment device for mobile machinery - Google Patents
SCR flue gas treatment device for mobile machinery Download PDFInfo
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- CN114849472A CN114849472A CN202210588713.9A CN202210588713A CN114849472A CN 114849472 A CN114849472 A CN 114849472A CN 202210588713 A CN202210588713 A CN 202210588713A CN 114849472 A CN114849472 A CN 114849472A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000003546 flue gas Substances 0.000 title claims abstract description 80
- 239000007787 solid Substances 0.000 claims abstract description 36
- 239000012535 impurity Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 12
- 230000003197 catalytic effect Effects 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 239000002360 explosive Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002337 anti-port Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/26—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies rotatable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to the field of flue gas treatment of mobile machinery, in particular to an SCR (selective catalytic reduction) flue gas treatment device for the mobile machinery, which comprises a shell, wherein one end of the shell is connected with an air inlet pipe, the air inlet pipe is connected with an exhaust pipe of the mobile machinery, the other end of the shell is connected with an air outlet pipe, a filtering device, a heating device and a catalytic device are sequentially arranged in the shell along the flow direction of the flue gas, the flue gas flowing into the shell firstly passes through the filtering device, the filtering device is used for separating solid impurities from the passing flue gas, then the flue gas passes through the heating device, the flue gas is heated to the temperature suitable for reaction and then is treated by the catalytic device and then is discharged, the flue gas is mixed with a reducing agent at the heating device, the filtering device has a cleaning function and can separate the solid impurities remained on the filtering device, the separated solid impurities are discharged by the cleaning device, and the solid impurities are discharged, the treatment effect of the flue gas is improved, so that the service life of the device is prolonged, and the cost is reduced.
Description
Technical Field
The invention relates to the field of tail gas treatment, in particular to an SCR (selective catalytic reduction) flue gas treatment device.
Background
Some mobile mechanical equipment often can accompany the emission of tail gas in the course of working, in order to eliminate the NOx of tail gas in the emission, generally can handle the flue gas of emission through SCR, but in the in-process of handling, the flue gas often accompanies a lot of solid impurity, solid impurity is when following the flue gas and entering on the catalyst board together, easily causes the pollution to the catalyst board, thereby make its catalytic effect worsen, conventional SCR processing apparatus all carries out solid impurity through the immobilized filter screen and filters, like this in long-time use, lead to the filter screen to be blockked up, influence its effect, be unsuitable for long-time use.
Disclosure of Invention
In order to solve the problem that the filtering effect is poor due to the fact that a filtering net for filtering solid impurities is inconvenient to clean in the prior art, the invention provides an SCR flue gas treatment device for mobile machinery.
The technical scheme of the invention is as follows: including the shell, the intake pipe is connected to shell one end, and the intake pipe is connected with the blast pipe of removal machinery, and the outlet duct is connected to the shell other end, sets gradually filter equipment, heating device and catalytic unit, its characterized in that along the flow direction of flue gas in the shell: the flue gas that flows into in the shell at first leads to filter equipment, filter equipment carries out solid impurity separation to the flue gas that passes through, later flue gas rethread heating device back, handle the back with the flue gas behind the temperature that is fit for the reaction through catalytic unit and discharge the flue gas, wherein it mixes with the reductant to let the flue gas in heating device department, filter equipment has the clearance function, can be with remaining the solid impurity separation on it, the solid impurity after the separation passes through cleaning device and discharges.
Furthermore, the heating device comprises a heating net, and the heating net is connected with the inner wall of the shell through a support.
Furthermore, the outer side of the shell is sleeved with an annular pipe at a position corresponding to the heating net, the inner wall of the annular pipe is provided with an opening, the annular pipe is filled with a reducing agent, the shell is provided with a plurality of nozzles at positions corresponding to the annular pipe, and the nozzles enable the interior of the shell to be communicated with the interior of the annular pipe.
Furthermore, the catalytic device comprises two catalyst plates, and the heated flue gas is mixed with the reducing agent to react the reducing agent with the flue gas under the action of the catalyst plates.
Furthermore, the filter device comprises a filter cover, the filter cover is rotatably connected with a rotating shaft, a plurality of filter screens are arranged on the rotating shaft, the end face of the filter cover is provided with a notch along the circulation direction of the flue gas, the notch can enable the flue gas to flow through, and the filter screens filter the flowing flue gas.
Furthermore, the rotating shaft is driven by a motor, the motor drives the rotating shaft to rotate through a gear train, the rotating state of the rotating shaft is changed by changing the running state of the motor, and the rotating state of the rotating shaft is changed to drive the mode of the filter screen to change, so that the filter screen has a self-cleaning effect.
Furthermore, the filter screen has effective area in the direction of perpendicular to flue gas flow, and the filter screen can revolve around the axis of rotation, appears in breach department in turn.
Furthermore, the filter screen include the arc filter screen, the arc filter screen twists reverse along the direction of the circulation of flue gas, makes the arc filter screen cover the area of breach in this orientation at the area of the circulation direction of flue gas.
Further, the filter screen include the fan-shaped filter screen of several along circumference distribution, through the first ring of spline installation several in the pivot, first ring side is passed through the connecting axle and is connected with corresponding fan-shaped filter screen, first ring terminal surface rotates and connects coaxial second ring, the second ring can the rotation, all suit first gear on the connecting axle, the position department cooperation installation ring gear that corresponds first gear on the second ring, first gear all with the ring gear meshing, can make all fan-shaped filter screens deflect when the second ring rotates.
Further, cleaning device include the exhaust tube, the position department that the shell corresponds filter equipment sets up the exhaust tube, the external air extractor of exhaust tube, the exhaust tube communicates with each other with the shell is inside, when filter equipment is with the dust separation, the air extractor takes solid impurity out.
The invention achieves the following beneficial effects: the invention reduces the passage through which the smoke flows by making the smoke pass through the gap on the filter cover, is convenient to filter solid impurities, the filter screen is arranged at the gap, the filter screen can filter the solid impurities in the smoke, and the filter screen is alternately arranged at the gap by utilizing the rotation of the rotating shaft in the filtering process, thereby preventing the subsequent smoke treatment from being influenced by the blockage caused by the long-time use of the filter screen, because the filter screen is alternately arranged at the gap, the solid impurities can not be accumulated together, so that the filter screen can be used for a long time, and when clearing the impurities, the rotating direction of the rotating shaft is only required to be changed by the motor, so that the airflow is reversely blown onto the filter screen, the solid impurities on the filter screen are blown off, the solid impurities are sucked away by the clearing device, thereby the long-time use is kept, and the smoke treatment is facilitated, the stability of this device is effectively improved.
Drawings
FIG. 1 is a schematic perspective view of the present embodiment;
FIG. 2 is a schematic diagram of a first explosive structure according to the present embodiment;
FIG. 3 is a schematic diagram of a second explosive structure according to the present embodiment;
fig. 4 is a schematic view of the internal explosion structure of the first embodiment;
FIG. 5 is a schematic view showing the internal structure of the second embodiment;
FIG. 6 is a schematic view of an explosive structure of the second embodiment;
FIG. 7 is a schematic view showing a state of use of the second embodiment;
fig. 8 is a schematic view of an internal explosion structure of the second embodiment.
Detailed Description
To facilitate an understanding of the present invention by those skilled in the art, specific embodiments thereof are described below with reference to the accompanying drawings.
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 the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
The invention provides an SCR flue gas treatment device for mobile machinery, which comprises a shell 1 for purifying flue gas, wherein one end of the shell 1 is connected with an air inlet pipe 2, and the air inlet pipe 2 is connected with an exhaust pipe of the mobile machinery, so the flue gas generated by the mobile machinery enters the shell 1 through the air inlet pipe 2, the flue gas is discharged through an air outlet pipe 3 after being treated by the shell 1, in the practical use, the shapes of the air inlet pipe 2 and the air outlet pipe can be changed as required, so that the device is convenient to install, wherein the NOx in the tail gas is treated by SCR (selective catalytic reduction) in the shell 1, and is selectively converted into N2 at 290-400 ℃ under the action of a catalyst by using a reducing agent NH3 to be discharged into the atmosphere.
As shown in fig. 2 and fig. 3, the position inside the housing 1 close to the gas inlet pipe 2 firstly filters the flue gas to be treated, firstly, the solid particles and the solid impurities in the flue gas are filtered, so as to prevent the solid particles and the solid impurities from affecting the subsequent reaction, the position inside the housing 1 close to the gas outlet pipe 3 is provided with the catalyst plate 4, the filtered flue gas is heated inside the housing 1 and then mixed with the reducing agent NH3, and then the flue gas passing through the catalyst plate 4 converts NOX into N2 and is discharged.
In order to guarantee the conversion rate, a plurality of catalyst plates 4 can be arranged in the shell 1, when the number of the catalyst plates 4 is large, the temperature of the flue gas is reduced by a large amount when the flue gas passes through the catalyst plates 4 layer by layer, so the subsequent catalyst plates 4 cannot play a catalytic role, and in order to guarantee that the conversion efficiency is better under the condition of low cost, two catalyst plates 4 are preferably arranged in the shell 1 in the embodiment, and through the two catalyst plates 4, the discharged flue gas can be effectively treated, so that the flue gas reaches the emission standard of the flue gas.
As shown in fig. 4, a heating net 5 is arranged in the housing 1, the heating net 5 is connected with the inner wall of the housing 1 through a bracket 6, the shape of the heating net 5 is preferably ring-shaped, and the filtered flue gas is heated when passing through the heating net 5, so that the flue gas is positioned in the temperature which is most suitable for generating reaction.
As shown in fig. 2 and 3, the outer side of the housing 1 is sleeved with an annular tube 8 at a position corresponding to the heating net 5, the inner side of the annular tube 8 is open, the inner side of the annular tube 8 is fixedly and hermetically connected with the housing 1, the side surface of the housing 1 is provided with a plurality of nozzles 7 at a position corresponding to the heating net 5, the housing 1 is communicated with the inner side of the annular tube 8 by the nozzles 7, the reducing agent filled in the annular tube 8 is preferably NH3, when the operation is required, the nozzles 7 are opened at the moment, NH3 in the annular tube 8 enters the housing 1 through the nozzles, so as to treat the flue gas, in the embodiment, the flue gas is firstly mixed with NH3 after filtering solid impurities, so that the solid impurities are prevented from being filtered away after being adsorbed with NH3, meanwhile, the annular tube 8 is internally sleeved with a first annular ring 9, the inner side of the first ring 9 is connected with the outer wall of the housing 1 in a sliding and sealing manner, the first ring 9 is connected with the end surface of the inner wall of the annular tube 8 through a plurality of springs 10, when NH3 in the annular pipe 8 is reduced, the first ring 9 moves under the action of the spring 10, the annular pipe 8 is at high pressure under the action of the spring 10, the NH3 can be conveyed into the shell 1 when the nozzle 7 is opened, and meanwhile, in order to ensure the pressure in the annular pipe 8 to be stable, a first through hole 11 is formed in the position, close to the spring 10, of the end face of the annular pipe 8, so that the annular pipe 8 is communicated with the outside.
As shown in fig. 4, a filter cover 12 is fixedly installed at a position close to an air inlet pipe 2 in a housing 1, a notch 18 completely penetrating along the axial direction of the filter cover 12 is formed at the end of the filter cover 12, wherein the axial direction of the filter cover 12 is exactly the same as the direction in which flue gas flows, the notch 18 allows the flue gas to pass, a coaxial rotating shaft 13 is rotatably connected in the filter cover 12, a motor 14 is fixedly installed on the inner end surface of the filter cover 12, a driving gear 15 is sleeved on the motor 14, a driven gear 16 is sleeved at the inner end of the rotating shaft 13, the driving gear 15 and the driven gear 16 are engaged with each other, the rotating shaft 13 is driven to rotate when the motor 14 rotates, the rotating shaft 13 rotates to filter the flue gas flowing through the notch 18 and filter solid impurities, a protective cover 17 is arranged at the inner end of the filter cover 12, the protective cover 17 wraps the driving gear 15 and the driven gear 16 to prevent the flue gas from being used, the gear is damaged.
The first embodiment:
in this embodiment, as shown in fig. 4, a plurality of arc-shaped filter screens 19 are disposed on the side surface of the rotating shaft 13 at the position of the filter housing 12, wherein the arc-shaped filter screens 19 are equidistantly distributed along the circumferential direction of the rotating shaft 13, the arc-shaped filter screens 19 are twisted along the axial direction of the rotating shaft 13, and at the same time, when one of the arc-shaped filter screens 19 is located at the position of the notch 18, the notch 18 can be completely shielded in the axial direction, as shown in fig. 4, when the leftmost end of the arc-shaped filter screen 19 is closely attached to one side of the notch 18, the rightmost end of the arc-shaped filter screen 19 does not coincide with the notch 18, so that when the smoke passes through the notch 18, all the smoke passes through the arc-shaped filter screens 19, and preferably, the first section and the tail end between two adjacent arc-shaped filter screens 19 have overlapping portions.
When this embodiment work, the flue gas passes through breach 18 this moment, and motor 14 drive pivot 13 rotates, as shown in fig. 4, looks from right side left along pivot 13, and pivot 13 anticlockwise rotates, and arced filter net 19 is at the internal rotation of filter mantle 12 this moment, and when the flue gas passed through breach 18 this moment, must pass through arced filter net 19, chooses suitable rotational speed simultaneously, can make the flue gas that passes through arced filter net 19 still can pass through next arced filter net 19, makes its filterable effect better.
Meanwhile, the motor 14 can move intermittently, so that one arc-shaped filter screen 19 stays at the notch 18 every time, and the next arc-shaped filter screen 19 stays at the notch 18 after a period of time, thereby preventing the filtering effect of one arc-shaped filter screen 19 from being poor after the arc-shaped filter screen is used for a long time.
When solid impurities attached to the arc-shaped filter screen 19 need to be discharged, the motor 14 can be rotated reversely, and because the solid impurities are attached to one surface of the arc-shaped filter screen 19 in the past, the reverse rotation enables air flow to be blown onto the arc-shaped filter screen 19 from the reverse surface, and the solid impurities can be taken down.
Second embodiment:
in this embodiment, as shown in fig. 5 and fig. 6, a plurality of fan-shaped filter screens 20 are disposed on the side surface of the rotating shaft 13, the fan-shaped filter screens 20 are distributed along the axis of the rotating shaft 13, wherein the fan-shaped filter screens 20 are close to each other to form a circular filter screen, and preferably, in this embodiment, two sets of fan-shaped filter screens 20 are disposed on the side surface of the rotating shaft 13 at the position of the filter cover 12.
As shown in fig. 8, the position of the rotating shaft 13 corresponding to each group of fan-shaped filter screens 20 is connected with a second ring 21 through a spline, the outer side of the second ring 21 is connected with the fan-shaped filter screens 20 through a connecting shaft 22, wherein the connecting shaft 22 is rotatably connected with the second ring 21, the connecting shaft 22 is fixedly connected with the fan-shaped filter screens 20, each connecting shaft 22 is sleeved with a first gear 23, the end surface of the second ring 21 is rotatably connected with a third ring 24, the position of the third ring 24 corresponding to the first gear 23 is fixedly provided with a gear ring 25, the gear rings 25 are respectively engaged with the corresponding first gears 23, when the third ring 24 rotates, all the fan-shaped filter screens 20 can be driven to deflect synchronously, as shown in fig. 7, the third ring 24 can be driven by electricity to rotate.
This embodiment is in the in-process of normal use, fan-shaped filter screen 20 forms a circular shape filter screen this moment, with breach 18 shutoff, motor 14 rotates this moment, it stops in breach 18 department to drive different fan-shaped filter screens 20, thereby the flue gas of convection current is filtered, when fan-shaped filter screen 20 is cleared up to needs, at this moment, third ring 24 rotates, drive all fan-shaped filter screens 20 and deflect, as shown in fig. 7, can be according to fan-shaped filter screen 20's deflection direction, the selection is with motor 14 antiport or forward rotation, when making fan-shaped filter screen 20 revolve along pivot 13, can make the air current blow to the dust from the reversal and be stained with on fan-shaped filter screen 20's side, thereby blow off solid impurity.
Through the two embodiments, after the solid impurities are blown, the solid impurities can be conveniently collected and discharged;
the side of the housing 1 is provided with a plurality of second through holes 26 distributed at equal intervals at positions corresponding to the filter cover 12, the filter cover 12 is provided with third through holes 27 at positions corresponding to the second through holes 26, the filter cover 12 is communicated with the inside of the annular pipe 8 through the second through holes 26 and the third through holes 27, an annular partition plate 28 is fixedly installed in the annular pipe 8, the annular partition plate 28 separates NH3 from the filter cover 12, the outer side of the annular pipe 8 penetrates through the air exhaust pipe 29, the air exhaust pipe 29 is externally connected with an air extractor (not shown in the figure), when solid particles are blown off by air flow, the air extractor works to discharge the solid impurities floating in the housing 1 through the third through holes 27, the second through holes 26 and the air exhaust pipe 29 in sequence, and therefore the device can perform subsequent work.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a SCR flue gas processing apparatus for mobile machinery, includes shell (1), and intake pipe (2) are connected to shell (1) one end, and intake pipe (2) are connected with mobile machinery's blast pipe, and outlet duct (3) are connected to shell (1) other end, set gradually filter equipment, heating device and catalytic unit, its characterized in that along the flow direction of flue gas in shell (1): the flue gas that flows into in shell (1) at first leads to filter equipment, and filter equipment carries out solid impurity separation to the flue gas that passes through, and later flue gas rethread heating device is back, handles the back discharge to the flue gas through catalytic unit after heating the temperature that is fit for the reaction with the flue gas, wherein locates to let flue gas and reductant mix at heating device, and filter equipment has the clearance function, can be with remaining the solid impurity separation on it, and the solid impurity after the separation passes through cleaning device and discharges.
2. The SCR flue gas treatment device for the mobile machinery according to claim 1, wherein: the heating device comprises a heating net (5), and the heating net is connected with the inner wall of the shell (1) through a support (6).
3. The SCR flue gas treatment device for the mobile machinery according to claim 2, wherein: the outer side of the shell (1) is sleeved with an annular pipe (8) at a position corresponding to the heating net (5), the inner wall of the annular pipe (8) is open, a reducing agent is filled in the annular pipe (8), a plurality of nozzles (7) are arranged at positions of the shell (1) corresponding to the annular pipe (8), and the nozzles (7) enable the interior of the shell (1) to be communicated with the interior of the annular pipe (8).
4. The SCR flue gas treatment device for the mobile machinery according to claim 1, wherein: the catalytic device comprises two catalyst plates (4), and the heated flue gas is mixed with the reducing agent to react with the reducing agent and the flue gas under the action of the catalyst plates (4).
5. The SCR flue gas treatment device for mobile machinery of claim 1, wherein: the filter device comprises a filter cover (12), wherein a rotating shaft (13) is rotatably connected in the filter cover (12), a plurality of filter screens are arranged on the rotating shaft (13), a notch (18) is formed in the end face of the filter cover (12) along the circulation direction of the flue gas, the flue gas can flow through the notch (18), and the filter screens filter the flowing flue gas.
6. An SCR flue gas treatment device for mobile machinery according to any one of the preceding claims, wherein: the rotary shaft (13) is driven by the motor (14), the motor (14) drives the rotary shaft (13) to rotate through the gear train, the rotary state of the rotary shaft (13) is changed by changing the running state of the motor (14), and the rotary state of the rotary shaft (13) is changed to drive the mode of the filter screen to be changed, so that the filter screen has a self-cleaning effect.
7. The SCR flue gas treatment device for the mobile machinery according to claim 6, wherein: the filter screen has effective area in the direction perpendicular to the smoke flowing direction, and the filter screen can rotate around the rotating shaft (13) and alternately appears at the gap (18).
8. The SCR flue gas treatment device for the mobile machinery according to claim 7, wherein: the filter screen include ARC filter screen (19), ARC filter screen (19) twist reverse along the direction of the circulation of flue gas, make ARC filter screen (19) cover the area of breach (18) on this direction at the area of the circulation direction of flue gas.
9. The SCR flue gas treatment device for the mobile machinery according to claim 7, wherein: the filter screen include along the fan-shaped filter screen of several (20) that circumference distributes, through the first ring of spline installation several (21) on pivot (13), first ring (21) side is passed through connecting axle (22) and is connected with corresponding fan-shaped filter screen (20), first ring (21) terminal surface rotates and connects coaxial second ring (24), second ring (24) can the rotation, all suit first gear (23) on connecting axle (22), correspond position department cooperation installation ring gear (25) of first gear (23) on second ring (24), first gear (23) all mesh with ring gear (25), can make all fan-shaped filter screen (20) deflect when second ring (24) rotate.
10. The SCR flue gas treatment device for the mobile machinery according to claim 1, wherein: the cleaning device comprises an air suction pipe (29), the position of the shell (1) corresponding to the filtering device is provided with the air suction pipe (29), the air suction pipe (29) is externally connected with an air pump, the air suction pipe (29) is communicated with the inside of the shell (1), and when the filtering device separates dust, the air pump pumps out solid impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210588713.9A CN114849472A (en) | 2022-05-27 | 2022-05-27 | SCR flue gas treatment device for mobile machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210588713.9A CN114849472A (en) | 2022-05-27 | 2022-05-27 | SCR flue gas treatment device for mobile machinery |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210186659U (en) * | 2019-03-07 | 2020-03-27 | 上海上龙供水设备有限公司 | Straight-flow filter |
| CN111644053A (en) * | 2020-05-12 | 2020-09-11 | 江苏峰峰鸿运环保科技发展有限公司 | Flue gas SCR denitration method and device |
| CN212719726U (en) * | 2020-06-19 | 2021-03-16 | 余姚市电波机械有限公司 | A kind of burner |
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2022
- 2022-05-27 CN CN202210588713.9A patent/CN114849472A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210186659U (en) * | 2019-03-07 | 2020-03-27 | 上海上龙供水设备有限公司 | Straight-flow filter |
| CN111644053A (en) * | 2020-05-12 | 2020-09-11 | 江苏峰峰鸿运环保科技发展有限公司 | Flue gas SCR denitration method and device |
| CN212719726U (en) * | 2020-06-19 | 2021-03-16 | 余姚市电波机械有限公司 | A kind of burner |
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Application publication date: 20220805 |