CN111744558A - Coating method of photocatalyst - Google Patents
Coating method of photocatalyst Download PDFInfo
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- CN111744558A CN111744558A CN202010672225.7A CN202010672225A CN111744558A CN 111744558 A CN111744558 A CN 111744558A CN 202010672225 A CN202010672225 A CN 202010672225A CN 111744558 A CN111744558 A CN 111744558A
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- 238000000576 coating method Methods 0.000 title claims abstract description 35
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 238000007605 air drying Methods 0.000 claims abstract description 29
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000007598 dipping method Methods 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 6
- 238000004080 punching Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000861 blow drying Methods 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 2
- 238000007654 immersion Methods 0.000 claims description 2
- 239000002105 nanoparticle Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000005470 impregnation Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0228—Coating in several steps
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/61—Surface area
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0234—Impregnation and coating simultaneously
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0236—Drying, e.g. preparing a suspension, adding a soluble salt and drying
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a coating method of a photocatalyst, belonging to the technical field of application of the photocatalyst, and the coating method comprises the following steps: s1, coating the fiber net on the front side and the back side of the base material through a water-based adhesive, and drying to obtain a matrix; s2, punching the side part of the substrate to form a positioning hole, and then putting the substrate into a dipping air drying box for dipping and air drying to attach the photocatalyst coating on the surface of the substrate, wherein the substrate is positioned in the dipping air drying box through the positioning hole; s3, placing the soaked and air-dried matrix in an oven at the temperature of 250-600 ℃, and drying for 1-2h, wherein the matrix soaking and air-drying are carried out in the same equipment, the matrix does not need to be taken out after soaking, the interference of the external environment is avoided in the air-drying process, and the coating quality of the photocatalyst can be effectively improved.
Description
Technical Field
The invention relates to the technical field of application of photocatalysts, in particular to a coating method of a photocatalyst.
Background
Volatile organic pollutants (VOCs) are a class of air pollutants and seriously threaten the ecological environment and human health due to the characteristics of toxicity, irritation, volatility and the like. How to economically and efficiently remove VOCs becomes a research hotspot in the current environmental field. Compared with the traditional treatment method, the photocatalytic oxidation method has the advantages of simple process, mild reaction conditions, low energy consumption and the like, and is considered to be one of the technologies with the most application prospect.
There are many ways of coating the photocatalyst, among which dipping and spraying are the most common. The traditional dip coating method generally adopts a dipping tank soaking mode, namely, a base material is soaked in a dipping tank for a certain time and then taken out, and the base material is dried after being dried. This coating method has the following disadvantages:
1. when the photocatalyst coating is dried, because the photocatalyst coating on the surface of the substrate is not dried, impurities such as external dust and wool are easily attached to the surface of the substrate, and after the photocatalyst coating is dried, the impurities such as the dust and the wool are attached to the surface of the substrate together with the photocatalyst coating, so that the coating quality is influenced.
2. When the base material is soaked, the base material is hung by a hanging tool firstly and then soaked, or the base material is directly soaked in a soaking pool and then taken out by other auxiliary tools, however, most of the base materials are plate-shaped and are not easy to hang, the hung part can not be coated with the photocatalyst, and in addition, the soaked base material is not dried due to surface slurry and is easy to influence the coating quality when taken out by the auxiliary tools.
In view of the above, the present invention provides a coating method of a photocatalyst.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a coating method of a photocatalyst.
In order to achieve the purpose, the invention provides the following technical scheme:
a method of coating a photocatalyst, comprising the steps of:
s1, coating the fiber net on the front side and the back side of the base material through a water-based adhesive, and drying to obtain a matrix;
s2, punching the side part of the substrate to form a positioning hole, and then putting the substrate into a dipping air drying box for dipping and air drying to attach the photocatalyst coating on the surface of the substrate, wherein the substrate is positioned in the dipping air drying box through the positioning hole;
s3, placing the immersed and air-dried matrix in an oven at the temperature of 250-600 ℃ and drying for 1-2 h.
More preferably: the immersion time is 30-90 s.
More preferably: the dipping air drying box comprises a cylinder body, a drying device, a motor, a screw rod and a positioning piece;
the top of the cylinder is covered with a cover body, the motor is installed in the center of the bottom of the cylinder, the screw rod is vertically arranged in the cylinder, the lower end of the screw rod is connected with the output shaft of the motor, and the upper end of the screw rod is contacted with the bottom of the cover body and is in rotating fit with the cover body;
the positioning piece is positioned in the cylinder and is in up-and-down sliding fit with the cylinder, and the positioning piece is in threaded fit with the screw rod, so that the positioning piece moves up and down when the screw rod rotates;
the base member is installed on the setting element, the inside thick liquids that is equipped with of barrel, the dispersion has anatase titanium dioxide nanometer particle in the thick liquids, it installs to weather the device just is used for inciting somebody to action attaching to on the barrel weathers the thick liquids on barrel surface.
More preferably: the positioning piece comprises a positioning frame and a cylinder, the cylinder is sleeved on the screw rod and is in threaded fit with the screw rod, the positioning frame comprises a vertical plate and a transverse plate, the vertical plate and the cylinder are respectively positioned at two opposite sides of the base body, the transverse plate is supported at the bottom of the base body, one end of the transverse plate is fixed on the cylinder, and the other end of the transverse plate is fixed at the bottom of the vertical plate;
the inner side of the vertical plate is provided with a groove, the upper end of the groove penetrates through the top of the vertical plate, the surface of the cylinder is provided with a mounting groove, the upper end of the mounting groove penetrates through the top of the cylinder, and the base body is inserted in the groove and the mounting groove.
More preferably: the top of the transverse plate is fixedly provided with a positioning column and a rubber pad, the positioning column is matched with the positioning hole in the base body, the positioning column is inserted into the positioning hole, and the rubber pad is supported at the bottom of the base body.
More preferably: the arc piece is fixed on the vertical plate, a second sliding groove is formed in the outer side of the arc piece, a second sliding strip is fixed on the inner wall of the barrel body, and the second sliding strip is inserted into the second sliding groove and is in sliding fit with the second sliding groove.
More preferably: the blow-drying device comprises a cylinder, a fixed block, a hoop, a hot air pipe and an air outlet pipe;
the hoop is sleeved on the surface of the barrel and is in up-and-down sliding fit with the barrel, a plurality of slotted holes are formed in the periphery of the upper part of the barrel, and the slotted holes are arranged at equal intervals;
the hot-blast main is fixed on embracing the ring, go out tuber pipe one end with the hot-blast main intercommunication, the other end passes the slotted hole just is provided with the fan housing, the fixed block is fixed embrace to encircle and go up, the cylinder is installed the barrel surface just is used for driving the fixed block, embrace ring, hot-blast main and go out the tuber pipe and reciprocate.
More preferably: the cylinder body is connected with a plurality of positioning frames, the positioning frames are distributed in a divergent manner by taking the central shaft of the screw rod as a center, and each positioning frame is provided with one substrate;
the air outlet pipe is positioned between the adjacent substrates.
More preferably: the slurry liquid level is located below the bottom of the slot, and the depth of the slurry meets the following requirements:
h2≥h1+5
wherein h is1The height of the vertical rod is in cm; h is2Is that it isThe depth of the slurry is in cm;
the bottom of the slotted hole is away from the height of the slurry liquid level, and the following requirements are met:
h'≥h1+15
wherein h is1The height of the vertical rod is in cm; h' is the height of the bottom of the slotted hole from the liquid level of the slurry, and the unit is cm.
More preferably: a first sliding strip is fixed on the inner side of the embracing ring, a first groove is formed in the surface of the cylinder body, and the first sliding strip is inserted into the first groove and is in up-and-down sliding fit with the first groove.
In conclusion, the invention has the following beneficial effects: the fiber net is adhered to the surface of the substrate, so that the specific surface area of the photocatalyst coating can be improved, the adhesive force of the photocatalyst can be improved, and the photocatalyst is uniformly dispersed on the surface of the substrate. The method is mainly characterized in that the soaking and the air drying of the substrate are carried out in the same equipment, the substrate does not need to be taken out after soaking, the interference of the external environment is avoided in the air drying process, the coating quality of the photocatalyst can be effectively improved, the substrate is taken out from the soaking air drying box after the surface of the substrate is air-dried, and then the substrate is placed into the oven for drying, so that the photocatalyst coating can be uniformly dispersed and uniform in thickness, and the surface flatness of the substrate is high.
When the dipping air drying box is used, the base body is firstly arranged between the positioning frame and the cylinder, then the motor is started, so that the base body and the positioning piece move to the bottom in the cylinder body until the base body is completely soaked in the slurry, the screw rod is rotated reversely after the base body is soaked for about 1min, so that the base body gradually moves upwards until the base body is completely separated from the slurry, and hot air is sent into the hot air pipe at the moment. After air drying, the cover body is opened, and the base body is taken out.
Drawings
FIG. 1 is a schematic structural view of an embodiment, which is mainly used for embodying the overall structure of an impregnation air-drying box;
FIG. 2 is a schematic structural diagram of an embodiment, which is mainly used for embodying the specific structure of the impregnation air-drying box;
FIG. 3 is a schematic structural diagram of an embodiment, which is mainly used for embodying the structure of the positioning element;
FIG. 4 is a schematic structural diagram of an embodiment, which is mainly used for embodying the structure of the positioning element;
FIG. 5 is a schematic structural diagram of an embodiment, which is mainly used for embodying the structure of the positioning frame;
FIG. 6 is a schematic structural diagram of an embodiment, which is mainly used for embodying the structure of the blow-drying device;
fig. 7 is a schematic structural diagram of the embodiment, which is mainly used for embodying the position of the positioning frame in the use state.
In the figure, 1, a cylinder; 2. a support leg; 3. a blow-drying device; 31. a cylinder; 32. a fixed block; 33. encircling; 34. a hot air pipe; 35. an air outlet pipe; 4. a motor; 5. a cover body; 6. a first chute; 7. a slot; 8. a screw rod; 9. a positioning member; 91. a positioning frame; 911. a vertical plate; 912. a transverse plate; 92. a cylinder; 93. an arc sheet; 94. a second chute; 95. mounting grooves; 96. a groove; 97. a positioning column; 98. a rubber pad; 10. a substrate.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example (b): a method for coating a photocatalyst, as shown in fig. 1 to 6, comprising the steps of:
and S1, coating the front and back sides of the base material with the fiber net through a water-based adhesive, and drying to obtain the matrix 10. Preferably, the substrate is plate-shaped and is foamed aluminum or a porous ceramic material.
S2, punching the side of the base body 10 to form two positioning holes, wherein the two positioning holes are positioned on the same side of the base body 10; then the base body 10 is put into an impregnation air drying box for impregnation and air drying, so that the photocatalyst coating is attached to the surface of the base body 10, and the base body 10 is positioned in the impregnation air drying box through the positioning holes. The dipping time is 30 to 90 seconds, and more preferably, the dipping time is 60 seconds.
S3, placing the immersed and air-dried matrix 10 in an oven at the temperature of 250-600 ℃ and drying for 1-2 h.
Preferably, the oven temperature is kept at about 400 ℃ and the drying time is about 1 h.
In the above technical solution, the fiber mesh is adhered to the surface of the substrate 10, so that on one hand, the specific surface area of the photocatalyst coating can be increased, and on the other hand, the adhesive force of the photocatalyst can be increased, so that the photocatalyst is uniformly dispersed on the surface of the substrate 10. The method is mainly characterized in that the soaking and the air drying of the substrate 10 are carried out in the same equipment, the substrate is not required to be taken out after soaking, the interference of the external environment is avoided in the air drying process, the coating quality of the photocatalyst can be effectively improved, the substrate 10 is taken out from the dipping air drying box after being air-dried on the surface, and then the substrate is placed into a drying box for drying, so that the photocatalyst coating can be uniformly dispersed and uniform in thickness, and the surface flatness of the substrate 10 is high.
Referring to fig. 1-6, the dipping air-drying box comprises a cylinder 1, a drying device 3, a motor 4, a screw rod 8 and a positioning piece 9. The top of the cylinder body 1 is open, the cover body 5 is covered at the open position, the motor 4 is installed at the center of the bottom of the cylinder body 1, the screw rod 8 is vertically arranged in the cylinder body 1, the lower end of the screw rod 8 penetrates through the shell of the cylinder body 1 and is connected with an output shaft of the motor 4, and the upper end of the screw rod is contacted with the bottom of the cover body 5 and is in running fit with the bottom of the cover body. Specifically, the center of the bottom of the cover body 5 is provided with a slot matched with the screw rod 8, and the upper end of the screw rod 8 is inserted into the slot and is in running fit with the slot, so that the screw rod 8 can stably rotate in the barrel body 1. The matrix 10 is arranged on the positioning piece 9, the inside of the cylinder 1 is filled with slurry, and anatase type titanium dioxide nano particles are dispersed in the slurry.
Referring to fig. 1-6, the positioning member 9 is located in the cylinder 1 and is in up-and-down sliding fit with the cylinder 1, and the positioning member 9 is in threaded fit with the screw 8, so that when the screw 8 rotates, the positioning member 9 moves up and down. Further preferably, the positioning member 9 includes a positioning frame 91 and a cylinder 92, and the cylinder 92 is sleeved on the screw rod 8 and is in threaded fit with the screw rod 8. The positioning frame 91 comprises a vertical plate 911 and a horizontal plate 912, the vertical plate 911 and the cylinder 92 are respectively located on two opposite sides of the base 10, the horizontal plate 912 is supported at the bottom of the base 10, one end of the horizontal plate is fixed on the cylinder 92, and the other end of the horizontal plate is fixed at the bottom of the vertical plate 911, so that the positioning frame 91 is L-shaped. The riser 911 is inboard seted up the recess 96, and riser 911 top is run through to recess 96 upper end, and mounting groove 95 has been seted up on the drum 92 surface, and the drum 92 top is run through to the mounting groove 95 upper end. The base body 10 is inserted into the groove 96 and the installation groove 95 such that the left and right sides of the base body 10 are positioned in the groove 96 and the installation groove 95, respectively.
In the above technical solution, in order to facilitate the disassembly and assembly of the base 10, the base 10 is detachably disposed on the positioning member 9 in an inserting manner. Because the cylinder 92 is sleeved on the screw rod 8 and is in threaded fit with the screw rod 8, when the motor 4 is started, the screw rod 8 drives the positioning piece 9 and the base body 10 to move up and down, so that the positioning piece 9 provided with the base body 10 is conveniently soaked in the slurry, and the soaked base body 10 is conveniently taken out to be drained and air-dried.
Referring to fig. 1-6, a positioning post 97 and a rubber pad 98 are fixed on the top of the horizontal plate 912. The positioning column 97 is matched with the positioning hole on the base body 10, the lower end of the positioning column 97 is fixed on the transverse plate 912, and the upper end of the positioning column is inserted into the positioning hole. Rubber pads 98 are supported at the bottom of the base 10, and two rubber pads 98 and two positioning columns 97 are arranged. The vertical plate 911 is fixed with an arc piece 93, the arc pieces 93 are positioned at two opposite sides of the screw rod 8, and the outer arc surface is contacted with the inner wall of the cylinder 92. The outer side of the arc piece 93 is provided with a second sliding groove 94, the second sliding groove 94 penetrates through the upper side and the lower side of the arc piece 93, and a second sliding strip matched with the second sliding groove 94 is fixed on the inner wall of the cylinder body 1. The second slide bar is inserted into the second slide groove 94 and is in sliding fit with the second slide groove 94.
In the above technical solution, the second slide bar and the second sliding groove 94 are mainly arranged to make the positioning element 9 move up and down smoothly and stably. When the base 10 is installed, the base 10 is simply inserted into the installation groove 95 and the groove 96, so that the positioning column 97 is inserted into the positioning hole, and the base 10 is supported on the rubber pad 98. The positioning column 97 is matched and fixed with the positioning hole, so that the installation stability of the base body 10 can be improved, and the rubber pad 98 can play a better protection role.
Referring to fig. 1-6, the drying device 3 is installed on the barrel 1 and used for drying the slurry attached to the surface of the barrel 1, and the drying device 3 includes a cylinder 31, a fixing block 32, a hoop 33, a hot air pipe 34 and an air outlet pipe 35. The embracing ring 33 is sleeved on the surface of the barrel body 1 and is in up-and-down sliding fit with the barrel body 1, a plurality of slotted holes 7 are formed around the upper part of the barrel body 1, and the slotted holes 7 are arranged at equal intervals. The hot-blast main 34 is the ring pipe and winds around establishing around barrel 1, and hot-blast main 34 is fixed on embracing ring 33, is provided with the air intake on the hot-blast main 34, and external hot-blast hose accessible air intake is connected with hot-blast main 34. The air outlet pipe 35 is fixed on the hot air pipe 34, one end of the air outlet pipe is communicated with the hot air pipe 34, and the other end of the air outlet pipe passes through the slot hole 7 and is provided with an air diffuser cover so as to blow out hot air to the periphery. The fixed block 32 is fixed on the outer side of the clasping ring 33, and the cylinder 31 is installed on the outer surface of the barrel 1 and used for driving the fixed block 32, the clasping ring 33, the hot air pipe 34 and the air outlet pipe 35 to integrally move up and down.
In the technical scheme, when the device is used, the base body 10 is firstly arranged between the positioning frame 91 and the cylinder 92, then the motor 4 is started, so that the base body 10 and the positioning piece 9 move to the bottom in the cylinder 1 until the base body 10 is completely soaked in the slurry for about 1min, then the screw rod 8 is rotated reversely, so that the base body 10 gradually moves upwards until the base body 10 is completely separated from the slurry, hot air is sent into the hot air pipe 34 at the moment, the air quantity is not too large, the gentle breeze is kept, the temperature of the hot air is not too high, the temperature of the hot air is about 42 ℃, and the air drying time is about 3-5 min. After air-drying, the lid 5 is opened and the substrate 10 is taken out.
Referring to fig. 1-6, a first slide bar is fixed on the inner side of the hoop 33, a first groove 96 is formed on the outer surface of the cylinder 1, and the first slide bar is inserted into the first groove 96 and is in up-and-down sliding fit with the first groove 96. The cylinder 92 is connected to a plurality of positioning frames 91, and the plurality of positioning frames 91 are distributed in a diverging manner around the center axis of the screw 8. Each positioning frame 91 is provided with a substrate 10, and the air outlet pipe 35 is positioned between the adjacent substrates 10. Along with the continuous use of thick liquids, the thick liquids liquid level can slowly descend, consequently should install the level gauge (not shown in the figure) on barrel 1, and need set up feed inlet (not shown in the figure) and discharge gate (not shown in the figure) on barrel 1, the discharge gate is located barrel 1 bottom, and the feed inlet is located barrel 1 lateral part. Referring to fig. 7, in order to prevent the slurry from flowing out of the slot 7, it is preferable that the slurry level is located below the bottom of the slot 7, specifically, the slurry level is located below the bottom of the slot 7, and the slurry depth satisfies the following requirements:
h2≥h1+5
wherein h is1Is the height of the vertical rod, and the unit is cm; h is2Is the depth of the slurry, in cm;
the height from the bottom of the slotted hole 7 to the slurry liquid level meets the following requirements:
h'≥h1+15
wherein h is1Is the height of the vertical rod, and the unit is cm; h' is the height of the bottom of the slotted hole 7 from the slurry liquid level, and the unit is cm.
In the above technical solution, when the substrate 10 is immersed, the substrate 10 needs to be completely immersed in the slurry to ensure the coating quality. As the slurry is used continuously, the slurry level will slowly drop, so the slurry depth is difficult to keep consistent, and the height of the vertical rod is a fixed value, therefore, the height from the bottom of the slotted hole 7 to the slurry level is preferably estimated according to the height of the vertical rod, not according to the slurry depth.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that several improvements and modifications without departing from the principle of the present invention will occur to those skilled in the art, and such improvements and modifications should also be construed as within the scope of the present invention.
Claims (10)
1. A method for coating a photocatalyst, characterized by: the method comprises the following steps:
s1, coating the front and back sides of the base material with the fiber net through a water-based adhesive, and drying to obtain a matrix (10);
s2, punching holes on the side of the substrate (10) to form positioning holes, then putting the substrate (10) into a dipping and air-drying box for dipping and air-drying to attach a photocatalyst coating on the surface of the substrate (10), and positioning the substrate (10) in the dipping and air-drying box through the positioning holes;
s3, placing the immersed and air-dried matrix (10) in an oven at the temperature of 250-600 ℃ and drying for 1-2 h.
2. The method of claim 1, wherein: the immersion time is 30-90 s.
3. The method of claim 1, wherein: the dipping air drying box comprises a cylinder body (1), a drying device (3), a motor (4), a screw rod (8) and a positioning piece (9);
the top of the cylinder body (1) is covered with a cover body (5), the motor (4) is installed in the center of the bottom of the cylinder body (1), the screw rod (8) is vertically arranged in the cylinder body (1), the lower end of the screw rod is connected with an output shaft of the motor (4), and the upper end of the screw rod is in contact with the bottom of the cover body (5) and is in running fit with the cover body;
the positioning piece (9) is positioned in the cylinder body (1) and is in up-and-down sliding fit with the cylinder body (1), and the positioning piece (9) is in threaded fit with the screw rod (8) so that the positioning piece (9) moves up and down when the screw rod (8) rotates;
base member (10) are installed on setting element (9), the inside thick liquids that are equipped with of barrel (1), the dispersion has anatase titanium dioxide nano particle in the thick liquids, it installs to weather device (3) just be used for on barrel (1) will be attached to the thick liquids on barrel (1) surface are weathered.
4. A method of coating a photocatalyst as claimed in claim 3, characterized in that: the positioning piece (9) comprises a positioning frame (91) and a cylinder (92), the cylinder (92) is sleeved on the screw rod (8) and is in threaded fit with the screw rod (8), the positioning frame (91) comprises a vertical plate (911) and a transverse plate (912), the vertical plate (911) and the cylinder (92) are respectively located on two opposite sides of the base body (10), the transverse plate (912) is supported at the bottom of the base body (10), one end of the transverse plate is fixed on the cylinder (92), and the other end of the transverse plate is fixed at the bottom of the vertical plate (911);
a groove (96) is formed in the inner side of the vertical plate (911), the upper end of the groove (96) penetrates through the top of the vertical plate (911), an installation groove (95) is formed in the surface of the cylinder (92), the upper end of the installation groove (95) penetrates through the top of the cylinder (92), and the base body (10) is inserted into the groove (96) and the installation groove (95).
5. The method of claim 4, wherein: a positioning column (97) and a rubber pad (98) are fixed at the top of the transverse plate (912), the positioning column (97) is matched with the positioning hole in the base body (10), the positioning column (97) is inserted in the positioning hole, and the rubber pad (98) is supported at the bottom of the base body (10).
6. The method of claim 5, wherein: be fixed with arc piece (93) on riser (911), second spout (94) have been seted up in arc piece (93) outside, be fixed with the second draw runner on barrel (1) inner wall, the second draw runner insert establish in second spout (94) and with second spout (94) sliding fit.
7. The method of claim 4, wherein: the blow-drying device (3) comprises a cylinder (31), a fixed block (32), a hoop (33), a hot air pipe (34) and an air outlet pipe (35);
the embracing ring (33) is sleeved on the surface of the barrel body (1) and is in up-and-down sliding fit with the barrel body (1), a plurality of slotted holes (7) are formed in the periphery of the upper part of the barrel body (1), and the slotted holes (7) are arranged at equal intervals;
hot-blast main (34) are fixed embrace on the ring (33), go out tuber pipe (35) one end with hot-blast main (34) intercommunication, the other end passes slotted hole (7) and be provided with the fan housing, fixed block (32) are fixed embrace on the ring (33), cylinder (31) are installed barrel (1) surface just is used for driving fixed block (32), embrace ring (33), hot-blast main (34) and go out tuber pipe (35) and reciprocate.
8. The method of claim 7, wherein: the cylinder (92) body (1) is connected with a plurality of positioning frames (91), the positioning frames (91) are distributed in a divergent mode by taking the central shaft of the screw rod (8) as the center, and each positioning frame (91) is provided with one base body (10);
the air outlet pipe (35) is positioned between the adjacent base bodies (10).
9. The method of claim 7, wherein: the slurry liquid level is positioned below the bottom of the slotted hole (7), and the slurry depth meets the following requirements:
h2≥h1+5
wherein h is1The height of the vertical rod is in cm; h is2Is the depth of the slurry in cm;
the bottom of the slotted hole (7) is far away from the height of the slurry liquid level, and the following requirements are met:
h'≥h1+15
wherein h is1The height of the vertical rod is in cm; h' is the height of the bottom of the slotted hole (7) from the liquid level of the slurry, and the unit is cm.
10. The method of claim 5, wherein: a first sliding strip is fixed on the inner side of the embracing ring (33), a first groove (96) is formed in the surface of the cylinder body (1), and the first sliding strip is inserted into the first groove (96) and is in up-and-down sliding fit with the first groove (96).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010672225.7A CN111744558A (en) | 2020-07-14 | 2020-07-14 | Coating method of photocatalyst |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010672225.7A CN111744558A (en) | 2020-07-14 | 2020-07-14 | Coating method of photocatalyst |
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Cited By (1)
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|---|---|---|---|---|
| CN119500494A (en) * | 2025-01-10 | 2025-02-25 | 潍坊三昌化工科技有限公司 | Catalyst impregnation apparatus and method |
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