CN110801869A - Denitration catalyst end hardening device and hardening method - Google Patents
Denitration catalyst end hardening device and hardening method Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims description 22
- 238000007598 dipping method Methods 0.000 claims abstract description 133
- 238000005470 impregnation Methods 0.000 claims abstract description 36
- 238000004108 freeze drying Methods 0.000 claims abstract description 34
- 238000001354 calcination Methods 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000032683 aging Effects 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims description 48
- 239000002243 precursor Substances 0.000 claims description 40
- 238000002156 mixing Methods 0.000 claims description 24
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 239000008279 sol Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 13
- 238000007710 freezing Methods 0.000 claims description 10
- 230000008014 freezing Effects 0.000 claims description 10
- 238000002791 soaking Methods 0.000 claims description 10
- 239000010902 straw Substances 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 7
- 239000004202 carbamide Substances 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- WHQSYGRFZMUQGQ-UHFFFAOYSA-N n,n-dimethylformamide;hydrate Chemical compound O.CN(C)C=O WHQSYGRFZMUQGQ-UHFFFAOYSA-N 0.000 claims description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 7
- 239000005416 organic matter Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000009776 industrial production Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 10
- 239000000835 fiber Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000012876 topography Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/64—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using alkaline material; using salts
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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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J33/00—Protection of catalysts, e.g. by coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/02—Heat treatment
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/50—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using organic liquids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/50—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using organic liquids
- B01J38/52—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using organic liquids oxygen-containing
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Abstract
The invention discloses a denitration catalyst end hardening device which comprises a drawing machine, a first dipping tank, a support, a second dipping tank, a freeze drying device and a muffle furnace, wherein the drawing machine is arranged on the top of the first dipping tank; the drawing machine, the first dipping tank, the support, the second dipping tank, the freeze drying device and the muffle furnace are respectively electrically connected with the controller and are sequentially connected through the transmission guide rail according to the end hardening processing sequence of the denitration catalyst. The denitration catalyst is fixed on a drawing machine and is dipped in a first dipping tank; then standing and aging; and (3) performing secondary impregnation in a second impregnation tank, performing freeze drying in a freeze drying box after the impregnation is completed, and then calcining in a muffle furnace to obtain the denitration catalyst with hardened end parts. The denitration catalyst is fast and efficient, the end part is hardened, automation is realized, the number of field operation staff is reduced, production efficiency is improved, production cost is reduced, and industrial production is facilitated.
Description
Technical Field
The invention belongs to the technical field of denitration catalysts, and particularly relates to a device and a method for hardening an end part of a denitration catalyst.
Background
In recent years, the control situation of the atmospheric pollutants in China is more and more severe, the Selective Catalytic Reduction (SCR) flue gas denitration technology is widely applied, and the market of the catalyst is also greatly developed.
The currently commonly used flue gas denitration catalyst mainly comprises a honeycomb catalyst and a plate catalyst. However, the end part of the denitration catalyst is subjected to the washing of flue gas for a long time, and a large amount of dust easily causes the severe abrasion of the catalyst.
Therefore, it is necessary for those skilled in the art to design an end hardening apparatus and an end hardening method for a denitration catalyst, which can be applied to an end hardening treatment in a regeneration process of the denitration catalyst to extend the service life of the denitration catalyst.
Disclosure of Invention
The invention aims to provide a denitration catalyst end hardening device, which solves the defects and shortcomings in the prior art.
The technical scheme for solving the technical problems is as follows:
the invention provides a denitration catalyst end hardening device which comprises a drawing machine, a first dipping tank, a second dipping tank, a freeze drying device, a muffle furnace and a controller, wherein the drawing machine is arranged on the top of the first dipping tank;
the drawing machine, the first dipping tank, the second dipping tank, the freeze drying device and the muffle furnace are respectively connected with the controller in an electric manner, and the drawing machine, the first dipping tank, the second dipping tank, the freeze drying device and the muffle furnace are sequentially connected through the transmission guide rail.
Preferably, a support is arranged between the first dipping tank and the second dipping tank, and the support is connected with the first dipping tank and the second dipping tank through a transmission guide rail respectively.
Preferably, the lifting machine consists of a manipulator, a horizontal guide rail, a vertical guide rail and a sliding frame;
the manipulator is fixedly connected to a vertical guide rail through a sliding frame, and the vertical guide rail is fixedly connected to a horizontal guide rail through the sliding frame; and the horizontal guide rail and the vertical guide rail are respectively provided with a servo motor.
Preferably, the first dipping pool is a low-temperature freezer; a compressor and a power supply are arranged in the first dipping pond, and the compressor is electrically connected with the power supply;
the first dipping tank is coated with an anticorrosive coating, and the outer surface of the anticorrosive coating is sequentially provided with a heat-insulating layer and a shell;
further comprising: the liquid discharge pipe is arranged at the bottom of the first dipping pond;
more preferably, the housing is made of a steel plate.
More preferably, the second dipping tank is internally coated with an anticorrosive coating, and the bottom of the second dipping tank is provided with a stirring device;
the anticorrosive coating is preferably an acid and alkali resistant coating such as polytetrafluoroethylene; and the anticorrosive coating is a steel plate with an anticorrosive coating.
More preferably, the first dipping pond and the second dipping pond are both provided with stirring devices, and the stirring devices are fixed on the inner surface of the dipping ponds.
Adopt above-mentioned further beneficial effect to lie in: the invention can effectively prolong the service life of the dipping tank and simplify the structure of the device.
The invention also provides a hardening method of the denitration catalyst end hardening device, which comprises the following steps:
(1) mixing NaOH, urea and water according to the mass ratio of (5-9) to (10-14) to (79-83) to obtain a solution; then pre-freezing the mixed solution for later use;
(2) respectively preparing a first dipping precursor liquid and a second dipping precursor liquid, placing the first dipping precursor liquid in a first dipping tank, and placing the second dipping precursor liquid in a second dipping tank for later use;
(3) fixing a denitration catalyst on a drawing machine, and dipping in a first dipping tank;
(4) placing the impregnated denitration catalyst on a support through a transmission guide rail for standing and aging;
(5) placing the aged denitration catalyst in a second dipping tank for soaking for 2-3 h;
(6) placing the denitration catalyst soaked in the step (5) in a freeze drying box through a transmission guide rail for freeze drying;
(7) and placing the freeze-dried denitration catalyst in a muffle furnace for calcining to obtain the end-hardened denitration catalyst.
Further, in the step (1), the pre-freezing temperature is-15 to 0 ℃, and the pre-freezing time is 1 to 5 min;
adopt above-mentioned further beneficial effect to lie in: the pre-freezing operation of the invention can effectively improve the solubility of organic matters and keep the good fluidity of the sol.
Further, the preparation method of the first impregnation precursor solution in the step (2) comprises the following steps: crushing an organic matter by using a fiber crusher, mixing the crushed organic matter with a dissolving solution according to the mass ratio of 1 (10-30) to obtain a sol first dipping precursor solution, and placing the first dipping precursor solution in a first dipping tank for later use;
the preparation method of the second dipping precursor solution comprises the following steps: mixing silica sol, water and N, N-dimethylformamide according to a mass ratio of (10-50) to (40-85) to (5-10) to obtain a sol second impregnation precursor solution, and placing the second impregnation precursor solution in a second impregnation tank for later use.
Furthermore, the crushing granularity of the organic matters is 100-200 meshes, the mixing and stirring speed of the dissolved solution and the organic matters is 100-200 rpm, and the stirring time is 1-5 min;
adopt above-mentioned further beneficial effect to lie in: the operation method of the invention can ensure that the crushed organic matters are attached to the surface of the end catalyst in a proper size.
Furthermore, the organic matter is one or a mixture of more of paper scraps, cotton and straws.
Adopt above-mentioned further beneficial effect to lie in: the main component of the organic matter is cellulose, and the organic matter can be completely dissolved to form a sol system, so that the subsequent adhesion and treatment of the sol at the end part are facilitated.
Further, the dipping times in the step (3) are 1-3 times, each dipping time is 2-3 hours, and the dipping depth is 5-20 cm;
adopt above-mentioned further beneficial effect to lie in: the operation method can ensure the thickness of the impregnated film layer.
Further, the aging time in the step (4) is 10-20 hours;
adopt above-mentioned further beneficial effect to lie in: by adopting the operation method, the cellulose template layer with stable load can be obtained.
Further, the freeze-drying temperature in the step (6) is-60 to-40 ℃, and the freeze-drying time is 5 to 15 hours;
adopt above-mentioned further beneficial effect to lie in: the operation method can protect the surface coating to be uniform, compact and not easy to crack.
Further, in the step (7), the calcination temperature is 400-600 ℃, and the calcination time is 0.5-2 h.
Adopt above-mentioned further beneficial effect to lie in: the operation method can remove the cellulose template, realize the hardening of the end part of the catalyst and ensure the utilization rate of the effective components at the end part of the catalyst.
The invention has the beneficial effects that: the end hardening device for the denitration catalyst provided by the invention is used for hardening the end of the denitration catalyst, so that the denitration catalyst is quickly and efficiently hardened, the automation is realized, the number of field operators is reduced, the production efficiency is improved, the production cost is reduced, the industrial production is facilitated, and the hardened denitration catalyst has a compact surface film layer and a long service life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of an end hardening apparatus for a denitration catalyst according to the present invention,
in fig. 1, the structure represented by each reference numeral is listed as follows: 1-a drawing machine, 2-a first dipping tank, 3-a bracket, 4-a second dipping tank, 5-a freeze drying device, 6-a muffle furnace and 7-a conveyor belt;
FIG. 2 is a schematic view of a first dipping tank of the denitration catalyst end hardening device of the present invention;
in fig. 2, the structure represented by each reference numeral is listed as follows: 21-compressor, 22-compressor power supply, 23-anticorrosive coating, 24-heat preservation layer, 25-steel plate shell, 26-stirring device and 27-liquid discharge pipe;
FIG. 3 is a surface topography diagram of the end portion of the denitration catalyst of example 1 after being hardened;
FIG. 4 is a surface topography diagram of the end portion of the denitration catalyst of example 2 after being hardened;
FIG. 5 is a surface topography diagram of the end portion of the denitration catalyst of the embodiment 3 after being hardened;
FIG. 6 is a surface topography diagram of the end portion of the denitration catalyst of example 4 after being hardened;
FIG. 7 is a surface topography diagram of the end portion of the denitration catalyst of the embodiment 5 after hardening.
Detailed Description
The following examples are intended to illustrate the present invention, but are not intended to limit the present invention. 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.
Example 1
(1) Mixing NaOH, urea and water according to the mass ratio of 9:10:83 to obtain a solution; then pre-freezing the mixed solution for later use;
(2) crushing the straws into 100 meshes by using a fiber crusher, and mixing the crushed straws with a dissolving solution according to the weight ratio of 1: 20 at a rotation speed of 200rpm, stirring and mixing for 1min to obtain a sol first dipping precursor solution, and then placing the first dipping precursor solution in a first dipping tank for later use;
mixing silica sol, water and N, N-dimethylformamide according to a mass ratio of 10:85:5 to obtain a sol second impregnation precursor solution, and then placing the second impregnation precursor solution in a second impregnation tank for later use;
(3) fixing the denitration catalyst on a drawing machine, and dipping 3 times in a first dipping tank, wherein the dipping time is 2 hours each time, and the dipping depth is 5cm each time;
(4) placing the impregnated denitration catalyst in the step (3) on a support through a sliding guide rail, and standing and aging for 10 hours;
(5) placing the aged denitration catalyst in the step (4) into a second dipping pool for soaking for 3 hours;
(6) placing the denitration catalyst soaked in the step (5) in a freeze drying box at-40 ℃ through a sliding guide rail for freeze drying for 15 h;
(7) and (4) placing the denitration catalyst subjected to freeze drying in the step (6) in a 400 ℃ muffle furnace for calcining for 2h to obtain the denitration catalyst with the hardened end part.
Example 2
(1) Mixing NaOH, urea and water according to the mass ratio of 5:14:79 to obtain a dissolved solution; then pre-freezing the mixed solution for later use;
(2) crushing paper scraps and cotton to 200 meshes by using a fiber crusher, stirring and mixing the crushed paper scraps, cotton and a dissolving solution at a mass ratio of 30:1 at a rotating speed of 100rpm for 5min to obtain a sol first impregnation precursor solution, and then placing the first impregnation precursor solution in a first impregnation tank for later use;
mixing silica sol, water and N, N-dimethylformamide according to a mass ratio of 50:40:10 to obtain a sol second impregnation precursor solution, and then placing the second impregnation precursor solution in a second impregnation tank for later use;
(3) fixing the denitration catalyst on a drawing machine, and dipping for 1 time in a first dipping pool for 3 hours, wherein the dipping depth is 20 cm;
(4) placing the impregnated denitration catalyst in the step (3) on a support through a sliding guide rail, and standing and aging for 10 hours;
(5) placing the aged denitration catalyst in the step (4) into a second dipping pool for soaking for 2 hours;
(6) placing the denitration catalyst soaked in the step (5) in a freeze drying box at-60 ℃ through a sliding guide rail for freeze drying for 5 hours;
(7) and (4) placing the denitration catalyst subjected to freeze drying in the step (6) in a muffle furnace at 600 ℃ for calcining for 0.5h to obtain the denitration catalyst with the hardened end part.
Example 3
(1) Mixing NaOH, urea and water according to the mass ratio of 7:12:81 to obtain a dissolved solution; then pre-freezing the mixed solution for later use;
(2) crushing paper scraps, cotton and straws to 150 meshes by using a fiber crusher, stirring and mixing the crushed paper scraps, cotton and straws with a dissolving solution at a mass ratio of 15:1 and a rotating speed of 150rpm for 3min to obtain a sol first impregnation precursor solution, and then placing the first impregnation precursor solution in a first impregnation tank for later use;
mixing silica sol, water and N, N-dimethylformamide according to the mass ratio of 30:62:7 to obtain a sol second impregnation precursor solution, and then placing the second impregnation precursor solution in a second impregnation tank for later use;
(3) fixing the denitration catalyst on a drawing machine, and carrying out dipping and soaking for 2 times in a first dipping tank, wherein the dipping time is 2.5 hours, and the dipping depth is 15 cm;
(4) placing the impregnated denitration catalyst in the step (3) on a support through a sliding guide rail, and standing and aging for 15 hours;
(5) placing the aged denitration catalyst in the step (4) in a second dipping pool for soaking for 2.5 hours;
(6) placing the denitration catalyst soaked in the step (5) in a freeze drying box at-50 ℃ through a sliding guide rail for freeze drying for 10 hours;
(7) and (4) placing the freeze-dried denitration catalyst in the step (6) in a muffle furnace at 500 ℃ for calcining for 1h to obtain the end-hardened denitration catalyst.
Example 4
(1) Mixing NaOH, urea and water according to the mass ratio of 8:13:80 to obtain a dissolved solution; then pre-freezing the mixed solution for later use;
(2) crushing cotton and straw to 120 meshes by using a fiber crusher, stirring and mixing the crushed paper scraps, cotton and straw with a dissolving solution at a mass ratio of 20:1 at a rotating speed of 180rpm for 2min to obtain a sol first impregnation precursor solution, and then placing the first impregnation precursor solution in a first impregnation tank for later use;
mixing silica sol, water and N, N-dimethylformamide according to the mass ratio of 25:55:10 to obtain a sol second impregnation precursor solution, and then placing the second impregnation precursor solution in a second impregnation tank for later use;
(3) fixing the denitration catalyst on a drawing machine, and carrying out dipping and soaking 3 times in a first dipping tank, wherein the dipping time is 3 hours each time, and the dipping depth is 13cm each time;
(4) placing the impregnated denitration catalyst in the step (3) on a support through a sliding guide rail, and standing and aging for 18 hours;
(5) placing the aged denitration catalyst in the step (4) into a second dipping pool for soaking for 3 hours;
(6) placing the denitration catalyst soaked in the step (5) in a freeze drying box at-55 ℃ through a sliding guide rail for freeze drying for 8 hours;
(7) and (4) calcining the freeze-dried denitration catalyst in the step (6) in a muffle furnace at 450 ℃ for 1.5h to obtain the end-hardened denitration catalyst.
Example 5
(1) Mixing NaOH, urea and water according to the mass ratio of 5:12:79 to obtain a dissolved solution; then pre-freezing the mixed solution for later use;
(2) mixing and crushing paper scraps and straws to 200 meshes by using a fiber crusher, stirring and mixing the crushed paper scraps, straws and a dissolving solution at a mass ratio of 12:1 at a rotating speed of 120rpm for 4min to obtain a sol first impregnation precursor solution, and then placing the first impregnation precursor solution in a first impregnation tank for later use;
mixing silica sol, water and N, N-dimethylformamide according to a mass ratio of 45:60:8 to obtain a sol second impregnation precursor solution, and then placing the second impregnation precursor solution in a second impregnation tank for later use;
(3) fixing the denitration catalyst on a drawing machine, and carrying out dipping and soaking for 2 times in a first dipping tank, wherein the dipping time is 2.5 hours, and the dipping depth is 7 cm;
(4) placing the impregnated denitration catalyst in the step (3) on a support through a sliding guide rail, and standing and aging for 16 hours;
(5) placing the aged denitration catalyst in the step (4) into a second dipping pool for soaking for 2 hours;
(6) placing the denitration catalyst soaked in the step (5) in a freeze drying box at-50 ℃ through a sliding guide rail for freeze drying for 12 hours;
(7) and (4) placing the freeze-dried denitration catalyst in the step (6) in a muffle furnace at 550 ℃ for calcining for 1h to obtain the end-hardened denitration catalyst.
According to the hardening method of the denitration catalyst end hardening device, the end hardening of the denitration catalyst is performed by using the denitration catalyst end hardening device provided by the embodiment of the invention, so that the denitration catalyst is quickly and efficiently hardened, the automation is realized, the number of field operators is reduced, the production efficiency is improved, the production cost is reduced, and the hardening method is beneficial to industrial production.
Examples 1-5 methods for end-hardening denitration catalyst the end-hardening apparatus used were:
the method comprises the following steps: the device comprises a drawing machine 1, a first dipping tank 2, a second dipping tank 4, a freeze drying device 5, a muffle furnace and a controller 6;
the drawing machine 1, the first dipping tank 2, the second dipping tank 4, the freeze drying device 5 and the muffle furnace 6 are respectively connected with the controller electrically, and the drawing machine 1, the first dipping tank 2, the second dipping tank 4, the freeze drying device 5 and the muffle furnace 6 are sequentially connected through the transmission guide rail 7.
In one embodiment, a support 3 is arranged between the first dipping pond 2 and the second dipping pond 4, and the support 3 is respectively connected with the first dipping pond 2 and the second dipping pond 4 through a transmission guide rail.
In one embodiment, the drawing machine 1 comprises a gripping robot, a horizontal guide rail, a vertical guide rail and a sliding frame, wherein the gripping robot is fixedly connected to the vertical guide rail through the sliding frame, the vertical guide rail is fixedly connected to the horizontal guide rail through the sliding frame, and the horizontal guide rail and the vertical guide rail are respectively provided with a servo motor.
Preferably, the first impregnation tank 2 is a low-temperature freezer; a compressor 21 and a power supply 22 are arranged in the first dipping tank 2, and the compressor 21 is electrically connected with the power supply 22; the first dipping tank 2 is coated with an anticorrosive coating 23, and the outer surface of the anticorrosive coating is sequentially provided with a heat-insulating layer 24 and a shell 25; the first dipping pond 2 further comprises a liquid discharge pipe 27, and the liquid discharge pipe 27 is arranged at the bottom of the first dipping pond 2; the shell 25 is made of steel plate; an anticorrosive coating is coated inside the second dipping tank, and a stirring device is arranged at the bottom of the second dipping tank; the anticorrosive coating is acid and alkali resistant coating such as polytetrafluoroethylene; the anticorrosive coating is a steel plate with an anticorrosive coating; first steeping cistern 2 and second steeping cistern 3 all are equipped with agitating unit, and agitating unit fixes the internal surface at the steeping cistern.
The hardening process of the denitration catalyst end part hardening device is as follows: fixing the catalyst on a grabbing manipulator of a drawing machine, wherein the end part of the catalyst is downward; starting a drawing machine, dipping the denitration catalyst in the first dipping pond through a sliding guide rail, after the dipping is finished, placing the denitration catalyst on the support through the sliding guide rail for aging, after the dipping is finished, dipping the denitration catalyst in the second dipping pond through the manipulator of the drawing machine and the sliding guide rail, after the secondary dipping is finished, placing the denitration catalyst in a freeze drying box for freeze drying through the manipulator of the drawing machine and the sliding guide rail, and then placing the denitration catalyst in a muffle furnace for calcining through the manipulator of the drawing machine and the sliding guide rail, so that the denitration catalyst with the hardened end part is obtained.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A denitration catalyst end hardening device is characterized by comprising a drawing machine, a first dipping tank, a second dipping tank, a freeze drying device, a muffle furnace and a controller;
the drawing machine, the first dipping tank, the second dipping tank, the freeze drying device and the muffle furnace are respectively electrically connected with the controller, and the drawing machine, the first dipping tank, the second dipping tank, the freeze drying device and the muffle furnace are sequentially connected through a transmission guide rail.
2. The denitration catalyst end hardening apparatus of claim 1, wherein a support is disposed between the first dipping tank and the second dipping tank, and the support is connected to the first dipping tank and the second dipping tank through a transfer guide rail, respectively.
3. The denitration catalyst end hardening apparatus according to claim 1, wherein the first dipping tank is a low-temperature freezer; a compressor and a power supply are arranged in the first dipping pond, and the compressor is electrically connected with the power supply;
the first dipping tank is coated with an anticorrosive coating, and the outer surface of the anticorrosive coating is sequentially provided with a heat-insulating layer and a shell;
further comprising: and the liquid discharge pipe is arranged at the bottom of the first dipping pond.
4. The denitration catalyst end hardening apparatus of claim 1, wherein the second dipping tank is internally coated with an anticorrosive coating.
5. The denitration catalyst end hardening apparatus according to claim 3 or 4, wherein the first dipping tank and the second dipping tank are each provided with a stirring device fixed to an inner surface of the dipping tank.
6. The method for hardening the denitration catalyst end part hardening apparatus according to any one of claims 1 to 5, comprising the steps of:
(1) mixing NaOH, urea and water according to the mass ratio of (5-9) to (10-14) to (79-83) to obtain a solution; then pre-freezing the mixed solution for later use;
(2) respectively preparing a first dipping precursor liquid and a second dipping precursor liquid, placing the first dipping precursor liquid in a first dipping tank, and placing the second dipping precursor liquid in a second dipping tank for later use;
(3) fixing a denitration catalyst on a drawing machine, and dipping in a first dipping tank;
(4) placing the impregnated denitration catalyst on a support through a transmission guide rail for standing and aging;
(5) placing the aged denitration catalyst in a second dipping pool for soaking;
(6) placing the denitration catalyst soaked in the step (5) in a freeze drying box through a transmission guide rail for freeze drying;
(7) and placing the freeze-dried denitration catalyst in a muffle furnace for calcining to obtain the end-hardened denitration catalyst.
7. The method for hardening an end portion hardening apparatus for a denitration catalyst according to claim 6, wherein the first impregnation precursor solution is prepared by a method comprising: crushing organic matters, mixing the crushed organic matters with a dissolving solution according to the mass ratio of 1 (10-30) to obtain a sol first dipping precursor solution, and placing the first dipping precursor solution in a first dipping tank for later use;
the preparation method of the second dipping precursor solution comprises the following steps: mixing silica sol, water and N, N-dimethylformamide according to the mass ratio of (10-50) to (40-85) to (5-10) to obtain a sol second dipping precursor solution, and placing the second dipping precursor solution in a second dipping tank for later use.
8. The hardening method of the denitration catalyst end hardening apparatus according to claim 7, wherein the organic matter is one or a mixture of several of paper scraps, cotton, and straw.
9. The hardening method of the denitration catalyst end hardening apparatus according to claim 6, wherein the dipping and pulling times in the step (3) are 1 to 3 times, each dipping time is 2 to 3 hours, and the dipping depth is 5 to 20 cm.
10. The hardening method of the denitration catalyst end part hardening apparatus according to claim 6, wherein the calcination temperature in the step (7) is 400 to 600 ℃, and the calcination time is 0.5 to 2 hours.
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Application publication date: 20200218 |