CN108636117B - Separation device of flat-plate denitration catalyst - Google Patents
Separation device of flat-plate denitration catalyst Download PDFInfo
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- CN108636117B CN108636117B CN201810730532.9A CN201810730532A CN108636117B CN 108636117 B CN108636117 B CN 108636117B CN 201810730532 A CN201810730532 A CN 201810730532A CN 108636117 B CN108636117 B CN 108636117B
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- 239000003054 catalyst Substances 0.000 title claims abstract description 106
- 238000000926 separation method Methods 0.000 title claims abstract description 32
- 239000002184 metal Substances 0.000 claims abstract description 26
- 238000011010 flushing procedure Methods 0.000 claims abstract description 24
- 239000000178 monomer Substances 0.000 claims abstract description 13
- 238000001125 extrusion Methods 0.000 claims description 28
- 239000000428 dust Substances 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 15
- 238000004080 punching Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- 239000007789 gas Substances 0.000 description 53
- 239000002351 wastewater Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (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)
- Chemical Kinetics & Catalysis (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a separation device of a flat plate type denitration catalyst, which comprises: a first flattening assembly to flatten the pleats of the catalyst monolith; the needling breaking assembly is arranged at the downstream of the first flattening assembly and comprises a base part and a needling needle arranged on the surface of the base part, and the needling needle can puncture the catalyst paste on the metal wire mesh in the catalyst monomer; a gas flushing assembly comprising a high pressure gas line; the high-pressure gas sprayed by the high-pressure gas pipe can wash and strip the catalyst paste on the metal wire net after needling and crushing; and/or the gas flushing component is integrated in the needling breaking component, and the high-pressure gas sprayed by the high-pressure gas pipe can flush and peel off the catalyst paste on the wire mesh in needling breaking. The separating device provided by the invention has the advantages of simple structure, low use cost and good separating effect.
Description
Technical Field
The invention relates to the technical field of denitration, in particular to a separation device of a flat-plate denitration catalyst.
Background
The flat plate type denitration catalyst is widely applied to flue gas denitration systems in the industries of metallurgy, heating power, electric power and the like due to the advantages of high mechanical strength, wear resistance and the like.
During the manufacture, the catalyst paste containing the active components is coated on a wire mesh substrate, then is pleated and sheared into single plates according to certain specifications to form a catalyst monomer, and then is subjected to high-temperature calcination treatment and assembly to be used in a denitration reactor. However, in long-term use, the activity of the catalyst gradually decreases or even becomes completely inactive due to erosion and abrasion of flue gas, invasion of toxic substances, and the like, and at this time, the catalyst needs to be taken out from the denitration reactor and safely treated.
Compared with the honeycomb denitration catalyst, the flat plate type denitration catalyst has the advantages that before being treated, the catalyst paste in the catalyst monomer is firstly required to be separated from the metal wire mesh base material, and then the spent catalyst paste and the metal wire mesh base material can be treated.
Therefore, how to provide a device for separating the catalyst paste from the wire mesh substrate is still a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a separation device of a flat-plate denitration catalyst, which has the advantages of simpler structure, lower use cost and better separation effect on a metal wire mesh and a catalyst paste in a catalyst monomer.
In order to solve the technical problems, the invention provides a separation device of a flat plate type denitration catalyst, which comprises: a first flattening assembly to flatten the pleats of the catalyst monolith; the needling breaking assembly is arranged at the downstream of the first flattening assembly and comprises a base part and a needling needle arranged on the surface of the base part, and the needling needle can puncture the catalyst paste on the metal wire mesh in the catalyst monomer; a gas flushing assembly comprising a high pressure gas line; the high-pressure gas sprayed by the high-pressure gas pipe can wash and strip the catalyst paste on the metal wire net after needling and crushing; and/or the gas flushing component is integrated in the needling breaking component, and the high-pressure gas sprayed by the high-pressure gas pipe can flush and peel off the catalyst paste on the wire mesh in needling breaking.
According to the separation device for the flat-plate denitration catalyst, provided by the invention, the first flattening component is used for flattening the folds of the catalyst monomers, then the catalyst paste on the metal wire mesh is crushed through the needling crushing component, and the catalyst paste after needling crushing and/or needling crushing is washed and stripped by matching with high-pressure gas, so that the separation effect of the catalyst paste on the surface of the metal wire mesh can be ensured to a greater extent.
In addition, compared with the common water flushing separation mode in the prior art, the scheme of flushing separation by adopting the high-pressure gas can not generate secondary pollutants such as waste water, can avoid the introduction of waste water recovery treatment equipment, is beneficial to simplifying the structure of the separation device, and further reduces the manufacturing and use cost of the separation device.
Optionally, an extrusion crushing assembly is further arranged between the first flattening assembly and the needling crushing assembly, and comprises at least one pair of rollers, wherein the gap size between the two rollers is larger than the thickness of the metal wire mesh and smaller than the thickness of the catalyst paste.
Optionally, in the pair of rollers, the surfaces of the two rollers are both provided with concave-convex structures.
Optionally, the gas flushing component is also arranged at the downstream of the extrusion crushing component so as to flush and peel off the catalyst paste on the wire mesh after extrusion crushing; and/or the extrusion crushing assembly is also integrated with the gas flushing assembly to flush and strip the catalyst paste on the wire mesh in extrusion crushing.
Optionally, the base of the needle-punching crushing assembly is a pair of rollers.
Optionally, in each set of the pair of rollers of the extrusion crushing assembly and the needling crushing assembly, at least one roller is a hollow roller and comprises a cylindrical part and sealing covers arranged at two ends of the cylindrical part, and the wall of the cylindrical part is provided with a plurality of air holes; one of the sealing covers is provided with a through hole, the high-pressure air pipe is inserted into the cylindrical part from the through hole, the pipe section is positioned in the cylindrical part, and a plurality of injection holes are axially arranged on the pipe wall at intervals.
Optionally, the device further comprises a supporting shaft sleeved and fixed on the high-pressure air pipe, wherein a bearing is sleeved outside the supporting shaft, and the outer edge of the bearing is in interference fit with the hole wall of the through hole or the inner wall surface of the cylindrical part; sealing diaphragms are arranged at two axial ends of the bearing so as to seal rolling bodies in the bearing.
Optionally, the high-pressure air pipe further comprises a supporting shaft fixed on the cylindrical part, the supporting shaft is provided with a through hole which is penetrated along the axial direction, the high-pressure air pipe penetrates through the through hole, and a rotary sealing piece is arranged between the outer wall surface of the high-pressure air pipe and the inner wall surface of the supporting shaft.
Optionally, another cover is connected with a rotating shaft, and the rotating shaft is connected with a driving component so as to drive the cylindrical part to rotate.
Optionally, the gas in the high-pressure gas pipe is high-pressure oil-free dry cold air.
Optionally, in the paired rollers of the needling and crushing assembly, the needles on the outer wall surfaces of the two oppositely arranged rollers are mutually staggered along the axial direction.
Optionally, the first flattening assembly includes at least one set of rollers, and the diameters of two rollers arranged oppositely in the pair of rollers of the first flattening assembly are smaller than or equal to the creasing height.
Optionally, a second flattening assembly is further included for flattening the wire mesh after separating the catalyst paste.
Optionally, the catalyst paste separating device further comprises an ash bucket and a dust collecting cover, wherein the ash bucket is used for collecting the separated catalyst paste, the dust collecting cover is conical, and the small diameter end of the dust collecting cover is connected with dust collecting equipment and is used for collecting dust generated in the separation process of the catalyst paste and the metal wire mesh.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a separation device for a flat-plate denitration catalyst provided by the invention;
FIG. 2 is a diagram showing a connection structure of the hollow roller and the high-pressure air pipe;
FIG. 3 is a view showing another connection structure of the hollow roller and the high-pressure air pipe;
fig. 4 is a schematic structural view of a needling breaker assembly.
The reference numerals in fig. 1-4 are illustrated as follows:
1 a first flattening assembly;
2 catalyst monomer, 21 pleating;
3 needling breaking assembly, 31 base, 32 needling;
4, gas flushing components, 41 high-pressure gas pipes and 411 spray holes;
5 extruding the crushing assembly, 51 a cylindrical part, 511 an air hole, 512 a key slot, 52 a sealing cover, 521 a through hole, 522 a spline, 53 a supporting shaft, 54 a bearing and 55 a rotating shaft;
6, a second flattening assembly;
7 ash hoppers;
8, a dust collecting cover;
and 9, a frame.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The term "plurality" as used herein refers to a plurality, typically two or more, of indefinite quantities; and when "a number" is used to denote the number of a certain number of components, the number of components is not necessarily related to each other.
The terms "first," "second," and the like herein are merely used for convenience in describing two or more structures or components having the same or similar structure, and do not denote any particular limitation of the order.
Referring to fig. 1 to 4, fig. 1 is a schematic structural view of a specific embodiment of a separation device for a flat plate type denitration catalyst provided by the present invention, fig. 2 is a schematic structural view of an embodiment of a hollow roller, fig. 3 is a schematic structural view of another embodiment of a hollow roller, and fig. 4 is a schematic structural view of a needling breaking assembly.
As shown in fig. 1, the invention provides a separation device of a flat plate type denitration catalyst, which comprises a first flattening component 1, a needling breaking component 3 and a gas flushing component 4. Wherein, the first flattening component 1 is used for flattening the folds 21 of the catalyst monomers 2 so as to facilitate the subsequent crushing operation; the needling and crushing assembly 3 is arranged at the downstream of the first flattening assembly 1 and comprises a base 31 and a needling needle 32 arranged on the surface of the base 31, wherein the needling needle 32 can puncture catalyst paste on a metal wire mesh in the catalyst monomer 2, particularly catalyst paste in a mesh, so as to finish preliminary separation of the catalyst paste and the metal wire mesh; the gas flushing assembly 4 comprises a high-pressure gas source (not shown in the figure) and a high-pressure gas pipe 41 communicated with the high-pressure gas source, the gas flushing assembly 4 can be arranged at the downstream of the needling crushing assembly 3 so as to flush and strip catalyst paste on the metal wire mesh after needling crushing through the high-pressure gas sprayed by the high-pressure gas pipe 41, and/or the gas flushing assembly 4 can be integrated in the needling crushing assembly 3 so as to flush and strip the catalyst paste on the metal wire mesh in needling crushing.
By adopting the structure, the folds 21 of the catalyst monomers 2 are flattened through the first flattening component 1, then the catalyst paste on the metal wire mesh is crushed through the needling crushing component 3, and the catalyst paste after needling crushing and/or needling crushing is scoured and stripped by matching with high-pressure gas, so that the separation effect of the catalyst paste on the surface of the metal wire mesh can be ensured to a greater extent.
In addition, compared with the common water flushing separation mode in the prior art, the scheme of flushing separation by adopting high-pressure gas does not generate secondary pollutants such as waste water, can avoid the introduction of waste water recovery treatment equipment, is beneficial to simplifying the structure of the separation device, and further reduces the manufacturing and use costs of the separation device.
In a specific scheme, the first flattening assembly 1 can be in a form of a pair of rollers, and the number of the first flattening assembly can be one group or multiple groups, and it can be understood that the greater the number of the pair of rollers, the better the flattening effect is, and the subsequent crushing treatment is facilitated. Of course, the first flattening unit 1 may be in the form of a pressing plate, and the pleats 21 may be flattened by applying a forging force perpendicular to the catalyst unit 2 (in the up-down direction in fig. 1).
In the pair of rollers of the first flattening assembly 1, the diameters of the two rollers which are oppositely arranged can be smaller than or equal to the height of the folds 21, that is, the rollers with smaller sizes can be adopted, so that the folds 21 are rolled along the advancing direction and gradually unfolded to be flattened, and are not folded and flattened in the direction perpendicular to the catalyst monomers 2. That is, after the above-mentioned scheme is adopted, the flattening of the pleats 21 will not substantially damage the wire net as the base material, and the recovery and utilization of the wire net are facilitated.
With continued reference to fig. 1, an extrusion crushing assembly 5 may be further disposed between the first flattening assembly 1 and the needling crushing assembly 3 to pre-crush the catalyst unit 2 before entering the needling crushing assembly 3, so as to reduce the crushing pressure of the needling crushing assembly 3. The extrusion crushing assembly 5 can also take the form of a pair of rollers, the number of which can be one group or a plurality of groups, and the greater the number of the pair of rollers, the better the extrusion crushing effect.
In any one of the pairs of rollers of the crushing assembly 5, the gap size between the two rollers disposed opposite to each other may be larger than the thickness of the wire mesh and smaller than the thickness of the catalyst paste, and the surfaces of both rollers may be provided with a concave-convex structure to enhance the crushing effect. Specifically, the concave-convex structure may be a grid pattern, or may be an irregular embossed pattern, an uneven tooth pattern, or any irregular pattern and irregular pattern combination, or may be a combination structure of a bump and a groove, and no matter what structure is adopted, it is only required to ensure that a larger extrusion crushing force can be generated on the catalyst monomer 2, so that catalyst gypsum on the surface of the extruded metal mesh may generate more cracks, or even be crushed directly.
The thickness of the catalyst paste refers to the thickness of the catalyst paste adhesive layer coated on both sides of the metal mesh, and the thickness does not change significantly due to the presence of the pleats 21 on the catalyst unit 2 or the flattening of the pleats 21; the gap dimension between the two rolls refers to the minimum distance between the outer surfaces of the two rolls, for example, when protrusions are present on both outer surfaces of the two rolls, and the gap dimension refers to the distance between the protrusions in the direction perpendicular to the roll axis.
It will be appreciated that where the first flattening assembly 1 and the crushing assembly 5 overlap functionally, the first flattening assembly 1 will necessarily generate a pressing force on the catalyst paste on the surface of the wire mesh during the flattening process of the folds 21, and will also necessarily cause a part of the catalyst paste to be crushed and dropped, so that, in implementation, only the first flattening assembly 1 may be provided, and no crushing assembly 5 is provided; however, as mentioned above, in order to ensure a better flattening effect, a roller with a smaller diameter is required, and in order to ensure a better crushing effect by extrusion, a sufficient extrusion force is required to be generated, which requires a larger diameter of the roller, and there is a certain contradiction between the two, so in the embodiment of the present invention, a scheme (i.e. the scheme in fig. 1) that separates the two functions of flattening and crushing is preferably adopted, so as to achieve both the effects of flattening and crushing.
The extrusion crushing assembly 5 may also be used in combination with the gas flushing assembly 4, in detail, the gas flushing assembly 4 may also be disposed downstream of the extrusion crushing assembly 5 to flush and strip the extruded and crushed catalyst paste through high-pressure gas, and/or the gas flushing assembly 4 may also be integrated into the extrusion crushing assembly 5 to flush and strip the extruded and crushed catalyst paste on the wire mesh through high-pressure gas.
In comparison, the combination of the needling and crushing unit 3 and the extrusion and crushing unit 5 with the gas scouring unit 4 is similar to that of the two units, including two schemes: in the embodiment of the invention, an integrated combination scheme is preferably adopted to improve the structural compactness of the separation device, so that the occupied area of the separation device can be reduced.
In the integrated combination scheme, the gas in the high-pressure gas pipe 41 can adopt gas with lower temperature to cool down the extrusion crushing assembly 5 and the needling crushing assembly 3 in the separation process, so that the service lives of the two assemblies can be prolonged, the specific value of the gas temperature is not limited here, and in practical application, the gas temperature can be set according to requirements. Further, the gas in the high-pressure gas pipe 41 may be dry gas to avoid the introduction of moisture, which causes the catalyst paste to adhere to the wire mesh and cause difficulty in separation; the gas in the high-pressure gas pipe 41 may also be oil-free gas to prevent the introduction of oily substances, which may contaminate the wire mesh and the catalyst paste. Therefore, in the embodiment of the invention, the gas in the high-pressure gas pipe 41 is preferably high-pressure oil-free dry cold air.
The needling breaker assembly 3 may also take the form of a pair of rollers, in which case the base 31 may be a round roller and the needles 32 may be provided on the peripheral wall of the base 31. Of course, the base 31 may be plate-shaped, and the lancet 32 may be attached to one of the plate-shaped surfaces. In a preferred solution, the first flattening assembly 1, the needling and crushing assembly 3 and the extrusion and crushing assembly 5 may all adopt a pair roller form, so as to flatten and crush the catalyst unit 2 and drive the catalyst unit 2 to move towards the downstream equipment, thus, a special conveying platform or conveying equipment is not required, and the structure of the separating device is more beneficial to be simplified.
Taking the needling and crushing assembly 3 and the extrusion and crushing assembly 5 in the form of counter rollers as an example, the following embodiments of the present invention will describe the combined structure of the needling and crushing assembly 3, the extrusion and crushing assembly 5 and the gas scouring assembly 4.
In each pair of rollers of the needling and crushing assembly 3 and the extrusion and crushing assembly 5, at least one roller may be a hollow roller, the hollow roller may include a cylindrical portion 51 and covers 52 disposed at both ends of the cylindrical portion 51, the wall of the cylindrical portion 51 may be provided with a plurality of air holes 511, one of the covers 52 may be provided with a through hole 521, that is, the cover 52 may be an annular cover, the high-pressure air pipe 41 may be inserted into the cylindrical portion 51 from the through hole 521, and a pipe section located in the cylindrical portion 51 may be provided with a plurality of spray holes 411 or nozzles at intervals along the axial direction of the pipe wall. The high pressure gas in the high pressure gas source can be sprayed into the hollow roller through the spraying hole 411 of the high pressure gas pipe 41 and sprayed through the air hole 511 to wash and strip the catalyst paste in the crushing.
In one embodiment, as shown in fig. 2, the high-pressure air pipe 41 may also be sleeved and fixed with a supporting shaft 53, and the supporting shaft 53 may be used for supporting the high-pressure air pipe 41 and improving the strength of the high-pressure air pipe 41; the support shaft 53 may be externally fitted with a bearing 54, and the bearing 54 may be in interference fit with the wall of the hole 521 or the inner wall surface of the cylindrical portion 51. In this way, the rotation of the cylindrical portion 51 will not affect the high-pressure air pipe 41, and the support shaft 53 and the high-pressure air pipe 41 can still be kept still, so that the normal use of the gas flushing assembly 4 can be ensured.
In this embodiment, sealing diaphragms (not shown in the figure) may be further disposed at two axial ends of the bearing 54, and the sealing diaphragms may be connected to an inner ring and an outer ring of the bearing 54, so as to seal rolling bodies in the bearing 54, so as to avoid pollution to the interior of the bearing 54 caused by dust generated in a process of separating the catalyst paste from the metal wire mesh, and further influence normal rotation of the hollow roller; meanwhile, the high-pressure gas inside the hollow roller may be sealed, so that the high-pressure gas generated by the high-pressure gas pipe 41 may be sprayed out from the spraying hole 411 as completely as possible, so as to be used for washing the catalyst paste on the surface of the wire mesh.
In another embodiment, as shown in fig. 3, the support shaft 53 is also included, the support shaft 53 may be fixedly connected with the hollow roller, so as to rotate synchronously, the support shaft 53 may be provided with a through hole penetrating along an axial direction, the high-pressure air pipe 41 may pass through the through hole, and a rotary sealing member may be provided between an outer wall surface of the high-pressure air pipe 41 and an inner wall surface of the support shaft 53, and the rotary sealing member may be a bearing bush, a piston ring, or the like, so as to realize dynamic sealing between the support shaft 53 and the high-pressure air pipe 41 on the premise that rotation of the support shaft 53 does not affect the high-pressure air pipe 41.
In comparison, the two embodiments can achieve the technical effects that the high-pressure air pipe 41 is not moved, and the cylindrical portion 51 rotates relative to the high-pressure air pipe 41, and when in implementation, a person skilled in the art can select according to actual needs.
The other cover 52, through which the high pressure air pipe 41 passes through the hole 521, is not provided, may be fixedly connected to the cylindrical portion 51, and may further be connected to a rotation shaft 55, and the rotation shaft 55 is connected to a driving member (specifically, may be a servo motor or the like) to drive the cylindrical portion to rotate.
Specifically, as shown in fig. 2, one of the two end surfaces of the cover 52 opposite to the cylindrical portion 51 may be provided with a spline 522, and the other may be provided with a key groove 512, so that synchronous rotation of the cover 52 and the cylindrical portion 51 may be achieved by cooperation of the spline 522 and the key groove 512; at the same time, the cover 52 and the cylindrical portion 51 may be fixed by a connecting member such as a screw. With this structure, there are two connection modes between the cover 52 and the cylindrical portion 51: the key connection and the connecting piece connection respectively play different roles, the key connection can bear the circumferential shearing force generated when the sealing cover 52 drives the cylindrical part 51 to rotate, so that the cylindrical part 51 and the sealing cover 52 can synchronously rotate, and the connecting piece connection can further ensure the connection reliability of the sealing cover 52 and the cylindrical part 51 because the shearing force is born by the key connection.
As shown in fig. 4, among the paired rollers of the needle punching crushing unit 3, the needles 32 of the outer wall surfaces of the two rollers disposed opposite to each other may be offset from each other in the axial direction.
For convenience of description, the two opposite rollers in fig. 4 may be referred to as an upper roller and a lower roller, respectively, the positions where the needles 32 are provided are protruding portions, the positions between the needles 32 are recessed portions, and when the distance between the two rollers is adjusted, the protruding portions (needles 32) of the upper roller may be inserted into the recessed portions of the lower roller, so that the distance between the two rollers is as small as possible, and thus the catalyst paste on the surface of the metal wire mesh may be better needled broken and stripped.
Further, the needle 32 provided on the upper roller may correspond to the air hole 511 provided on the lower roller, and the needle 32 provided on the lower roller may correspond to the air hole 511 provided on the upper roller. Thus, when the roller spacing is adjusted, the needles 32 of the upper roller can be inserted into the air holes 511 of the lower roller, and the needles 32 of the lower roller can be inserted into the air holes 511 of the upper roller to compress the spacing between the two rollers to a greater extent, thereby enhancing the crushing and stripping of the surface of the metal wire mesh, particularly the catalyst paste in the mesh of the metal wire mesh.
With continued reference to fig. 1, the separation device for a flat-plate catalyst provided by the present invention may further include a second flattening component 6, configured to flatten the wire mesh after the catalyst paste is separated, so as to ensure the flatness of the wire mesh after the separation is completed, and facilitate stacking, transportation and recycling of the wire mesh. Specifically, the second flattening assembly 6 may also be in the form of a pair of rollers, and the number of the second flattening assembly may be one group or multiple groups, and the greater the number, the better the flattening effect on the wire mesh; similar to the structure of the first flattening assembly 1, the diameter of the rollers of the second flattening assembly 6 may also be smaller to ensure the flattening effect.
Further, the separating apparatus may further include a frame 9, and the first flattening assembly 1, the needling breaking assembly 3, the crushing extrusion assembly 5, and the second flattening assembly 6 may be mounted on the frame 9. The dust hopper 7 can be arranged below the frame 9 and used for collecting separated catalyst paste, the dust hood 8 can be arranged above the frame 9, the dust hood 8 can be conical, the small-diameter end of the dust hood can be connected with dust collecting equipment, and the dust collecting equipment can specifically comprise dust removing components such as a fan, a bag type dust collector and the like so as to collect dust generated in the separation process of the catalyst paste and the metal wire mesh.
It should be noted that, with respect to the first flattening assembly 1, the crushing assembly 5, the needling crushing assembly 3, and the second flattening assembly 6 which are in the form of the pair rollers, the roller spacing between each pair of rollers in actual operation is not limited, and those skilled in the art can select according to actual needs in practice; specifically, the rolls of each pair may be driven by a servo motor in combination with an on-line monitoring unit, a predetermined control program, or the like, to adjust the roll pitch of each pair.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (11)
1. A separation device for a flat-plate denitration catalyst, comprising:
a first flattening assembly (1) to flatten the pleats (21) of the catalyst units (2);
the needling and crushing assembly (3) is arranged at the downstream of the first flattening assembly (1) and comprises a base (31) and a needling needle (32) arranged on the surface of the base (31), wherein the needling needle (32) can puncture the catalyst paste on the metal wire mesh in the catalyst monomer (2);
a gas flushing assembly (4) comprising a high pressure gas pipe (41);
the downstream of the needling and crushing assembly (3) is provided with the gas flushing assembly (4), and the high-pressure gas sprayed by the high-pressure gas pipe (41) can flush and peel off the catalyst paste on the wire mesh after needling and crushing; and/or the gas flushing component (4) is integrated in the needling breaking component (3), and the high-pressure gas sprayed by the high-pressure gas pipe (41) can flush and peel off the catalyst paste on the wire mesh in needling breaking;
the first flattening assembly (1) comprises at least one group of rollers, and the diameters of two rollers which are oppositely arranged in the rollers of the first flattening assembly (1) are smaller than or equal to the height of the folds (21);
the catalyst paste flattening device further comprises a second flattening assembly (6), wherein the second flattening assembly (6) is used for flattening the wire mesh after the catalyst paste is separated;
the catalyst paste separating device is characterized by further comprising an ash bucket (7) and a dust collecting cover (8), wherein the ash bucket (7) is used for collecting the separated catalyst paste, the dust collecting cover (8) is conical, and the small diameter end of the dust collecting cover is connected with dust collecting equipment and is used for collecting dust generated in the separation process of the catalyst paste and the metal wire mesh.
2. The device for separating the flat-plate denitration catalyst according to claim 1, wherein an extrusion crushing assembly (5) is further arranged between the first flattening assembly (1) and the needling crushing assembly (3), and comprises at least one pair of rollers, wherein the gap size between the rollers is larger than the thickness of the wire mesh and smaller than the thickness of the catalyst paste.
3. The device for separating a flat plate type denitration catalyst according to claim 2, wherein the pair of rollers are provided with concave-convex structures on the surfaces of both rollers.
4. The device for separating the flat-plate denitration catalyst according to claim 2, wherein the gas flushing component (4) is also arranged at the downstream of the extrusion crushing component (5) so as to flush and strip the catalyst paste on the wire mesh after extrusion crushing; and/or the number of the groups of groups,
the extrusion crushing assembly (5) is also integrated with the gas flushing assembly (4) so as to flush and peel off the catalyst paste on the wire mesh in extrusion crushing.
5. The device for separating a flat plate type denitration catalyst according to claim 4, wherein the base (31) of the needling crushing assembly (3) is a pair of rollers.
6. The device for separating a flat plate type denitration catalyst according to claim 5, wherein in each set of the pair of rollers of the extrusion crushing assembly (5) and the needling crushing assembly (3), at least one roller is a hollow roller and comprises a cylindrical part (51) and sealing covers (52) arranged at two ends of the cylindrical part (51), and a plurality of air holes (511) are formed in the wall of the cylindrical part (51);
one of the covers (52) is provided with a through hole (521), the high-pressure air pipe (41) is inserted into the cylindrical part (51) from the through hole (521), and a pipe section positioned in the cylindrical part (51) is provided with a plurality of spraying holes (411) at intervals along the axial direction of the pipe wall.
7. The device for separating a flat plate type denitration catalyst according to claim 6, further comprising a support shaft (53) which is externally fixed to the high-pressure gas pipe (41), wherein a bearing (54) is externally sleeved on the support shaft (53), and the outer edge of the bearing (54) is in interference fit with the hole wall of the through hole (521) or the inner wall surface of the cylindrical part (51);
sealing diaphragms are arranged at two axial ends of the bearing (54) to seal rolling bodies in the bearing (54).
8. The device for separating a flat plate type denitration catalyst according to claim 6, further comprising a support shaft (53) fixed to the cylindrical portion (51), wherein the support shaft (53) is provided with a through hole penetrating in the axial direction, the high-pressure gas pipe (41) penetrates through the through hole, and a rotary seal is provided between an outer wall surface of the high-pressure gas pipe (41) and an inner wall surface of the support shaft (53).
9. The device for separating a flat plate type denitration catalyst according to claim 6, wherein another cover (52) is connected with a rotating shaft (55), and the rotating shaft (55) is connected with a driving part to drive the cylindrical part (51) to rotate.
10. The device for separating a flat plate type denitration catalyst according to claim 6, wherein the gas in the high-pressure gas pipe (41) is high-pressure oil-free dry cold air.
11. The device for separating a flat plate type denitration catalyst according to claim 5, wherein the needles (32) of the outer wall surfaces of the two oppositely arranged rollers are axially offset from each other in the pair of rollers of the needle punching crushing assembly (3).
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| CN201810730532.9A CN108636117B (en) | 2018-07-05 | 2018-07-05 | Separation device of flat-plate denitration catalyst |
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| CN201810730532.9A CN108636117B (en) | 2018-07-05 | 2018-07-05 | Separation device of flat-plate denitration catalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111231397B (en) * | 2020-02-10 | 2021-12-28 | 北京华电光大环境股份有限公司 | Continuous pleating equipment and SCR plate type catalyst |
| JP6929480B1 (en) * | 2020-12-28 | 2021-09-01 | 三菱パワー株式会社 | Method and apparatus for separating the metal substrate of the plate-shaped catalyst element and the catalyst solid |
| CN113600597B (en) * | 2021-07-30 | 2022-10-28 | 苏州西热节能环保技术有限公司 | Method and device for separating and recovering active substances and base materials of flat-plate catalyst |
| CN115318795B (en) * | 2022-08-31 | 2023-05-12 | 华能重庆珞璜发电有限责任公司 | Flat plate type catalyst powder separating and recycling device and abrasion proportion determining method |
| CN116328855A (en) * | 2023-03-06 | 2023-06-27 | 苏州西热节能环保技术有限公司 | Automatic cleaning and stripping method for plate-type catalyst |
| CN116711533A (en) * | 2023-08-04 | 2023-09-08 | 诸城市万景源农业科技有限公司 | Hay bundling auxiliary device |
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