CN113264537A - Preparation method of efficient NA-X type molecular sieve, spraying equipment and using method of spraying equipment - Google Patents
Preparation method of efficient NA-X type molecular sieve, spraying equipment and using method of spraying equipment Download PDFInfo
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- CN113264537A CN113264537A CN202110430682.XA CN202110430682A CN113264537A CN 113264537 A CN113264537 A CN 113264537A CN 202110430682 A CN202110430682 A CN 202110430682A CN 113264537 A CN113264537 A CN 113264537A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/20—Faujasite type, e.g. type X or Y
- C01B39/22—Type X
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/04—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation
- B05B13/0405—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads
- B05B13/041—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work the spray heads being moved during spraying operation with reciprocating or oscillating spray heads with spray heads reciprocating along a straight line
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Abstract
The invention discloses a preparation method of an efficient NA-X type molecular sieve, spraying equipment and a using method of the spraying equipment, wherein the preparation method comprises the following steps: s1, adding NA-X molecular sieve raw powder and attapulgite into a stirrer according to a certain proportion, and uniformly mixing and stirring to obtain a mixture A, wherein the NA-X molecular sieve raw powder accounts for 65-80 parts by weight, and the attapulgite accounts for 20-35 parts by weight; s2, adding the reinforcing agent into the mixture A, and uniformly mixing and stirring to obtain a mixture B, wherein the mass of the reinforcing agent is 7-13% of that of the mixture A. According to the invention, the glue solution is sprayed on the surface of the molecular sieve semi-finished product D, dust solidification is carried out to reduce the powder falling degree, the obtained molecular sieve can effectively reduce the powder falling, the influence on finished product gas is reduced during actual use, dust entering the interior of equipment is reduced, the service life of the equipment is prolonged, and the harm to a human body is reduced.
Description
Technical Field
The invention relates to the technical field of molecular sieves, in particular to a preparation method of an efficient NA-X type molecular sieve, spraying equipment and a using method of the efficient NA-X type molecular sieve.
Background
The molecular sieve is a hydrated aluminosilicate or natural zeolite with the function of screening molecules, takes artificially synthesized zeolite as a main component and attapulgite as a binder, is fully mixed and then made into particles with different sizes by a sugar coating machine, and then is dried and roasted to finally obtain the particle molecular sieve with certain strength, wherein the molecular sieve is widely applied to the chemical industry and the aviation industry.
However, the existing particle molecular sieves rub against each other during operation, and some fine particles are generated due to the rubbing, and these particles further generate falling powder under the action of gravity and friction force, and these falling powder can cause some problems in the using process of the molecular sieves, specifically as follows:
1. the product gas is polluted, and when the gas is screened by using the molecular sieve, the falling powder is discharged along with the product gas, so that the product gas contains dust, and the concentration of the product is influenced;
2. when the molecular sieve is used for sieving gas, dust can enter the equipment along with the gas, so that the service life of the equipment is shortened;
3. in the process of filling the molecular sieve, the falling powder of the molecular sieve can be diffused in the air, and workers can inhale the air with the falling powder and damage the human health.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, a preparation method, a spraying device and a use method of the high-efficiency NA-X type molecular sieve are provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of a high-efficiency NA-X type molecular sieve comprises the following steps:
s1, adding NA-X molecular sieve raw powder and attapulgite into a stirrer according to a certain proportion, and uniformly mixing and stirring to obtain a mixture A, wherein the NA-X molecular sieve raw powder accounts for 65-80 parts by weight, and the attapulgite accounts for 20-35 parts by weight;
s2, adding an enhancer into the mixture A, and uniformly mixing and stirring to obtain a mixture B, wherein the mass of the enhancer is 7-13% of that of the mixture A;
s3, putting the mixture B into a rolling type granulator in batches, and adding a 5% sodium tripolyphosphate solution in a spraying mode while rolling to obtain crystal grains for later use;
s4, pouring the prepared crystal grains into a sugar coating machine, adding 5% of sodium tripolyphosphate solution in a spraying mode while adding materials, rolling in the sugar coating machine after the crystal grains are wetted, and gradually increasing the crystal grains until the diameter of the crystal grains meets the requirement to obtain a molecular sieve semi-finished product C;
s5, putting the molecular sieve semi-finished product C into a drier at the temperature of 200 ℃, drying for 60 minutes, and drying the molecular sieve semi-finished product C;
s6, putting the molecular sieve semi-finished product C into a vibrating sieve for sieving, and removing the molecular sieve semi-finished product D which does not meet the particle diameter requirement to obtain a molecular sieve semi-finished product D which meets the particle diameter requirement;
s7, putting the molecular sieve semi-finished product D into spraying equipment, and spraying glue solution on the surface of the molecular sieve semi-finished product D by the spraying equipment to obtain a surface-treated molecular sieve semi-finished product E;
s8, drying the molecular sieve semi-finished product E in a dryer to solidify dust on the surface of the molecular sieve semi-finished product E and reduce the falling powder degree to obtain a molecular sieve semi-finished product F;
s9, placing the dried molecular sieve semi-finished product F into a high temperature furnace, and carrying out high temperature treatment at the temperature of 500-800 ℃ for 120 minutes to obtain the molecular sieve finished product.
As a further description of the above technical solution:
in step S2, the reinforcing agent is any one or a mixture of any several of aluminum oxide, titanium oxide, calcium compound or fluoride.
As a further description of the above technical solution:
the aluminum oxide compound is any one of alkoxy aluminum, sodium metaaluminate or alumina sol;
the titanium oxide is titanium sol or titanate;
the calcium compound is calcium hydroxide or calcium sulfate;
the fluoride is any one of sodium fluoride, potassium fluoride or ammonium fluoride.
As a further description of the above technical solution:
in step S9, the high-temperature treatment is a three-stage high-temperature treatment, which is as follows:
a first stage: the temperature is 500 ℃ and 600 ℃ for 30 minutes;
and a second stage: treating at 600 ℃ and 700 ℃ for 30 minutes;
a third stage: the temperature is 700 ℃ and 800 ℃ for 60 minutes.
As a further description of the above technical solution:
in step S7, the glue solution is seaweed glue solution.
As a further description of the above technical solution:
a spraying device comprises a spraying box body, wherein first fixed blocks are fixedly connected to two sides of the spraying box body, a rubber block is fixedly mounted on each first fixed block, a plurality of first grooves are formed in each rubber block, through grooves are formed in the first grooves, and a shaking mechanism for driving the rubber blocks to shake is arranged in the spraying box body;
the spraying box is internally and fixedly provided with a fourth fixed block and two guide rods, the guide rods are connected with a moving block in a sliding mode, the bottom of the moving block is fixedly connected with a fixed plate, a plurality of spray heads are fixedly arranged at the bottom of the fixed plate, glue can be sprayed out of the spray heads, and a driving mechanism for driving the moving block to move is arranged in the spraying box.
As a further description of the above technical solution:
actuating mechanism includes the cylinder, rotate on the fourth fixed block and install first connecting rod, rotate on the motion piece and install the second connecting rod, the free end of second connecting rod rotates the installation with the free end of first connecting rod, fixedly connected with installation piece on the first connecting rod, the second recess has been seted up in the installation piece, fixed mounting has the cylinder in the spraying box, fixed mounting has gliding slide bar in the second recess on the piston rod of cylinder.
As a further description of the above technical solution:
the shaking mechanism comprises a lifting rod, an installation box is fixedly installed below the rubber block, a second fixed block is fixedly installed in the installation box, the lifting rod moving in the vertical direction is connected to the second fixed block in a sliding mode, the top of the lifting rod is contacted with the bottom of the rubber block, a driving motor is fixedly installed in the installation box, and the driving motor drives the lifting rod to reciprocate in the vertical direction through a transmission assembly.
As a further description of the above technical solution:
the transmission assembly comprises an oval disc, the oval disc is connected to an output shaft of the driving motor in a transmission mode, the bottom of the lifting rod is hemispherical, the bottom of the lifting rod is abutted to the top of the oval disc, a third fixing block is fixedly mounted in the installation box, a limiting block is fixedly connected to the outer side of the lifting rod, and the third fixing block is elastically connected with the limiting block through a spring.
As a further description of the above technical solution:
a method of using a spray coating device comprising the steps of:
s1, pouring a molecular sieve semi-finished product D on the rubber block;
s2, starting a driving motor to rotate to drive an elliptical disc to rotate, wherein the bottom of a lifting rod is abutted against the top of the elliptical disc, the lifting rod is driven to reciprocate in the vertical direction through the elliptical disc and a spring, and the top of the lifting rod is contacted with the bottom of a rubber block to drive the rubber block to shake;
s3, spraying glue solution on the surface of the molecular sieve semi-finished product D on the rubber block by the spray head, enabling the piston rod of the air cylinder to extend out, enabling the sliding rod to slide in the second groove, driving the first connecting rod to rotate, driving the motion block to move through the second connecting rod and keeping away from the fourth fixed block, enabling the piston rod of the air cylinder to retract, enabling the sliding rod to slide in the second groove, driving the first connecting rod to rotate, driving the motion block to move through the second connecting rod and be close to the fourth fixed block, further adjusting the position of the spray head to spray the glue solution on the surface of the molecular sieve semi-finished product D on the rubber block, and obtaining the surface-treated molecular sieve semi-finished product E.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the glue solution is sprayed on the surface of the molecular sieve semi-finished product D, dust solidification is carried out to reduce the powder falling degree, the obtained molecular sieve can effectively reduce the powder falling, the influence on finished product gas is reduced during actual use, dust entering the interior of equipment is reduced, the service life of the equipment is prolonged, and the harm to a human body is reduced.
2. According to the invention, the reinforcing agent is added, so that the strength of the finished molecular sieve particles is improved, the molecular sieve is prevented from being broken due to low structural strength when the molecular sieve is used, and the molecular sieve is convenient to use.
3. According to the invention, the driving motor is started to rotate to drive the elliptical disc to rotate, the bottom of the lifting rod is abutted against the top of the elliptical disc, the lifting rod is driven to reciprocate in the vertical direction through the elliptical disc and the spring, the top of the lifting rod is contacted with the bottom of the rubber block to further drive the rubber block to shake, and when the spray head sprays glue solution on the surface of the molecular sieve semi-finished product D, the rubber block shakes to enable the glue solution sprayed on the surface of the molecular sieve semi-finished product D to be more uniformly mixed, so that the spraying effect is improved, and the powder falling prevention effect is improved.
4. According to the invention, the spray head sprays glue solution on the surface of the molecular sieve semi-finished product D on the rubber block, the piston rod of the starting air cylinder extends out, the sliding rod slides in the second groove to drive the first connecting rod to rotate, the moving block is driven to move through the second connecting rod and is far away from the fourth fixed block, and similarly, the piston rod of the starting air cylinder retracts to drive the moving block to move and approach the fourth fixed block, so that the position of the spray head is adjusted to spray the glue solution on the molecular sieve semi-finished product D on the rubber block in a larger range, the spraying effect is improved, and the powder falling prevention effect is improved.
Drawings
FIG. 1 illustrates a schematic view of a drive mechanism of a spray coating device provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of the interior of a spray housing of a spray coating device according to an embodiment of the present invention;
FIG. 3 shows a schematic view of the interior of an installation cabinet of a painting apparatus provided in accordance with an embodiment of the present invention;
FIG. 4 shows an enlarged schematic view at A of a spray coating device provided according to an embodiment of the invention;
fig. 5 shows a schematic structural diagram of a rubber block of the spraying device provided by the embodiment of the invention.
Illustration of the drawings:
1. spraying a box body; 2. a first fixed block; 3. a rubber block; 301. a first groove; 302. a through groove; 4. installing a box; 5. a lifting rod; 6. a second fixed block; 7. a spring; 8. a third fixed block; 9. a limiting block; 10. an elliptical disk; 11. a drive motor; 12. a cylinder; 13. a slide bar; 14. mounting blocks; 1401. a second groove; 15. a first link; 16. a second link; 17. a fourth fixed block; 18. a guide bar; 19. a motion block; 20. a fixing plate; 21. and (4) a spray head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
The invention provides a technical scheme that: a preparation method of a high-efficiency NA-X type molecular sieve comprises the following steps:
s1, adding NA-X molecular sieve raw powder and attapulgite into a stirrer according to a certain proportion, and uniformly mixing and stirring to obtain a mixture A, wherein the NA-X molecular sieve raw powder accounts for 65-80 parts by mass, and the attapulgite accounts for 20-35 parts by mass;
s2, adding a reinforcing agent into the mixture A, and uniformly mixing and stirring to obtain a mixture B, wherein the mass of the reinforcing agent is 7-13% of that of the mixture A;
the reinforcing agent is any one or a mixture of any more of aluminum oxide, titanium oxide, calcium compound or fluoride, and the aluminum oxide is any one of alkoxy aluminum, sodium metaaluminate or alumina sol;
the titanium oxide is titanium sol or titanate;
the calcium compound is calcium hydroxide or calcium sulfate;
the fluoride is any one of sodium fluoride, potassium fluoride or ammonium fluoride;
s3, putting the mixture B into a rolling granulator in batches, and adding a 5% sodium tripolyphosphate solution in a spraying mode while rolling to obtain crystal grains for later use;
s4, pouring the prepared crystal grains into a sugar coating machine, adding 5% of sodium tripolyphosphate solution in a spraying mode while adding materials, rolling in the sugar coating machine after the crystal grains are wetted, and gradually increasing the crystal grains until the diameter of the crystal grains meets the requirement to obtain a molecular sieve semi-finished product C;
s5, putting the molecular sieve semi-finished product C into a drier at the temperature of 200 ℃, drying for 60 minutes, and drying the molecular sieve semi-finished product C;
s6, putting the molecular sieve semi-finished product C into a vibrating sieve for sieving, and removing the molecular sieve semi-finished product D which does not meet the particle diameter requirement to obtain a molecular sieve semi-finished product D which meets the particle diameter requirement;
s7, putting the molecular sieve semi-finished product D into spraying equipment, and spraying glue solution on the surface of the molecular sieve semi-finished product D by the spraying equipment to obtain a surface-treated molecular sieve semi-finished product E, wherein the glue solution is seaweed glue solution;
s8, drying the molecular sieve semi-finished product E in a dryer to solidify dust on the surface of the molecular sieve semi-finished product E and reduce the falling powder degree to obtain a molecular sieve semi-finished product F;
s9, placing the dried molecular sieve semi-finished product F into a high temperature furnace, and carrying out high temperature treatment at the temperature of 500-800 ℃ for 120 minutes to obtain the molecular sieve finished product.
The high-temperature treatment adopts three-stage high-temperature treatment, which comprises the following steps:
a first stage: the temperature is 500 ℃ and 600 ℃ for 30 minutes;
and a second stage: treating at 600 ℃ and 700 ℃ for 30 minutes;
a third stage: the temperature is 700 ℃ and 800 ℃ for 60 minutes.
Referring to fig. 1-5, a spraying apparatus includes a spraying box 1, wherein two sides of the spraying box 1 are fixedly connected with first fixing blocks 2, rubber blocks 3 are fixedly mounted on the first fixing blocks 2, a plurality of first grooves 301 are formed in the rubber blocks 3, through grooves 302 are formed in the first grooves 301, and a shaking mechanism for driving the rubber blocks 3 to shake is arranged in the spraying box 1;
a fourth fixed block 17 and two guide rods 18 are fixedly arranged in the spraying box body 1, a moving block 19 is connected on the guide rods 18 in a sliding manner, a fixed plate 20 is fixedly connected at the bottom of the moving block 19, a plurality of spray heads 21 are fixedly arranged at the bottom of the fixed plate 20, the spray heads 21 can spray glue solution, a driving mechanism for driving the moving block 19 to move is arranged in the spraying box body 1, the driving mechanism comprises an air cylinder 12, a first connecting rod 15 is rotatably arranged on the fourth fixed block 17, a second connecting rod 16 is rotatably arranged on the moving block 19, the free end of the second connecting rod 16 is rotatably arranged with the free end of the first connecting rod 15, an installation block 14 is fixedly connected on the first connecting rod 15, a second groove 1401 is arranged in the installation block 14, the air cylinder 12 is fixedly arranged in the spraying box body 1, a sliding rod 13 which slides in the second groove 1401 is fixedly arranged on the piston rod of the air cylinder 12, a shaking mechanism comprises a lifting rod 5, an installation box 4 is fixedly arranged below the rubber block 3, fixed mounting has second fixed block 6 in install bin 4, sliding connection has lifter 5 at the motion in vertical direction in the second fixed block 6, 5 tops of lifter and 3 bottom contacts of block rubber, fixed mounting has driving motor 11 in install bin 4, driving motor 11 drives lifter 5 reciprocating motion in vertical direction through drive assembly, drive assembly includes oval dish 10, drive connection has oval dish 10 on driving motor 11's the output shaft, the bottom of lifter 5 is the hemisphere, the bottom of lifter 5 is contradicted with oval dish 10 top, fixed mounting has third fixed block 8 in install bin 4, the outside fixedly connected with stopper 9 of lifter 5, pass through spring 7 elastic connection between third fixed block 8 and the stopper 9.
Referring to fig. 1-5, the spraying apparatus is used as follows:
s1, pouring a molecular sieve semi-finished product D on the rubber block 3;
s2, starting the driving motor 11 to rotate to drive the elliptical disk 10 to rotate, enabling the bottom of the lifting rod 5 to abut against the top of the elliptical disk 10, driving the lifting rod 5 to reciprocate in the vertical direction through the elliptical disk 10 and the spring 7, enabling the top of the lifting rod 5 to be in contact with the bottom of the rubber block 3, and further driving the rubber block 3 to shake;
s3, spraying glue solution on the surface of the molecular sieve semi-finished product D on the rubber block 3 by the spray head 21, enabling the piston rod of the air cylinder 12 to extend out, enabling the sliding rod 13 to slide in the second groove 1401 to drive the first connecting rod 15 to rotate, driving the moving block 19 to move through the second connecting rod 16 and keep away from the fourth fixed block 17, enabling the piston rod of the air cylinder 12 to retract, enabling the sliding rod 13 to slide in the second groove 1401 to drive the first connecting rod 15 to rotate, driving the moving block 19 to move through the second connecting rod 16 and get close to the fourth fixed block 17, further adjusting the position of the spray head 21 to spray the glue solution on the surface of the molecular sieve semi-finished product D on the rubber block 3, and obtaining the surface-treated molecular sieve semi-finished product E.
Start driving motor 11 and rotate, it rotates to drive oval dish 10, the bottom and the oval dish 10 top of lifter 5 are contradicted, drive lifter 5 reciprocating motion in vertical direction through oval dish 10 and spring 7, 5 tops of lifter and 3 bottom contacts of block rubber, and then 3 shakes of drive block rubber, when shower nozzle 21 is to semi-manufactured goods D surface coating glue solution of molecular sieve, 3 shakes of block rubber can make semi-manufactured goods D surface coating glue solution of molecular sieve more mix, improve the spraying effect, the improvement prevents the whitewashed effect.
The shower nozzle 21 is to the semi-manufactured goods D surface spraying glue solution of molecular sieve on the rubber piece 3, it stretches out to start cylinder 12 piston rod, slide bar 13 slides in second recess 1401, drive first connecting rod 15 and rotate, move and keep away from fourth fixed block 17 through second connecting rod 16 drive motion piece 19, and is the same as, start cylinder 12 piston rod withdrawal, drive motion piece 19 moves and is close to fourth fixed block 17, and then the position of adjusting shower nozzle 21 makes the glue solution can spout the semi-manufactured goods D of molecular sieve on the rubber piece 3 more extensively, improve the spraying effect, improve and prevent falling powder effect.
Molecular sieve powder falling test principle:
and (2) wet method: putting a certain amount of molecular sieve sample into quantitative water, making the dust of the sample enter into the liquid, comparing the change of the solution light transmittance with the light transmittance of the standard liquid to obtain the falling powder content data, wherein the measuring instrument is a turbidity meter, and the measuring range is as follows: 0-200NTU, minimum count of 0.1 NTU.
And (3) dry method: when the floating dust in a dark room is irradiated, the scattered light intensity of the dust is in direct proportion to the mass concentration of the dust under certain conditions of the physical properties of the dust, the scattered light intensity is converted into pulses for counting, namely the relative mass concentration of the dust is measured, and the relative mass concentration of the dust can be measured directly by presetting a K value (calculation coefficient)And the mass concentration of the dust is displayed, when the molecular sieve is tested, a certain amount of the molecular sieve is dropped into a darkroom from a certain height in a free falling manner, and the measuring instrument is a microcomputer dust meter and has the measuring range: 0.1-100mg/m3Minimum count was 0.001mg/m3。
The following table shows experimental data measured under the same experimental conditions;
molecular sieve powder falling experimental data
The molecular sieve I adopted in the experiment is the molecular sieve prepared by the method, the molecular sieve II is the molecular sieve purchased in the market, the particle diameters of the molecular sieve I and the molecular sieve II are both 3.0-3.5mm, and the experimental data shows that the glue solution is sprayed on the surface of the molecular sieve semi-finished product D in the preparation method, the dust solidification is carried out to reduce the falling powder degree, the obtained molecular sieve can effectively reduce the falling powder, when the molecular sieve is actually used, the influence on finished product gas is reduced, the dust entering into the equipment is reduced, the service life of the equipment is prolonged, and the harm to human bodies is reduced;
method for testing strength of molecular sieve:
the method uses an intelligent particle strength tester to apply pressure to the axial direction or point contact of a molecular sieve sample after roasting, measures the crushing pressure value of particles, and evaluates the strength of the sample by the crushing resistance value of unit area.
The following table shows experimental data measured under the same experimental conditions;
molecular sieve strength experimental data
The molecular sieve I adopted in the experiment is the molecular sieve prepared by the method, the molecular sieve II is the molecular sieve purchased in the market, and the particle diameters of the molecular sieve I and the molecular sieve II are both 3.0-3.5 mm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A preparation method of a high-efficiency NA-X type molecular sieve is characterized by comprising the following steps:
s1, adding NA-X molecular sieve raw powder and attapulgite into a stirrer according to a certain proportion, and uniformly mixing and stirring to obtain a mixture A, wherein the NA-X molecular sieve raw powder accounts for 65-80 parts by weight, and the attapulgite accounts for 20-35 parts by weight;
s2, adding an enhancer into the mixture A, and uniformly mixing and stirring to obtain a mixture B, wherein the mass of the enhancer is 7-13% of that of the mixture A;
s3, putting the mixture B into a rolling granulator in batches, and adding a 5% sodium tripolyphosphate solution in a spraying mode while rolling to obtain crystal grains for later use;
s4, pouring the prepared crystal grains into a sugar coating machine, adding 5% of sodium tripolyphosphate solution in a spraying mode while adding materials, rolling in the sugar coating machine after the crystal grains are wetted, and gradually increasing the crystal grains until the diameter of the crystal grains meets the requirement to obtain a molecular sieve semi-finished product C;
s5, putting the molecular sieve semi-finished product C into a drier at the temperature of 200 ℃, drying for 60 minutes, and drying the molecular sieve semi-finished product C;
s6, putting the molecular sieve semi-finished product C into a vibrating sieve for sieving, and removing the molecular sieve semi-finished product D which does not meet the particle diameter requirement to obtain a molecular sieve semi-finished product D which meets the particle diameter requirement;
s7, putting the molecular sieve semi-finished product D into spraying equipment, and spraying glue solution on the surface of the molecular sieve semi-finished product D by the spraying equipment to obtain a surface-treated molecular sieve semi-finished product E;
s8, drying the molecular sieve semi-finished product E in a dryer to solidify dust on the surface of the molecular sieve semi-finished product E and reduce the falling powder degree to obtain a molecular sieve semi-finished product F;
s9, placing the dried molecular sieve semi-finished product F into a high temperature furnace, and carrying out high temperature treatment at the temperature of 500-800 ℃ for 120 minutes to obtain the molecular sieve finished product.
2. The method of claim 1, wherein in step S2, the enhancer is any one or a mixture of any more of aluminum oxide, titanium oxide, calcium compound or fluoride.
3. The method for preparing a high efficiency NA-X molecular sieve according to claim 2, wherein the aluminum oxy-compound is any one of alkoxy aluminum, sodium metaaluminate or alumina sol;
the titanium oxide is titanium sol or titanate;
the calcium compound is calcium hydroxide or calcium sulfate;
the fluoride is any one of sodium fluoride, potassium fluoride or ammonium fluoride.
4. The method for preparing a high efficiency NA-X molecular sieve according to claim 3, wherein in step S9, the high temperature treatment is a three-stage high temperature treatment, which comprises the following steps:
a first stage: the temperature is 500 ℃ and 600 ℃ for 30 minutes;
and a second stage: treating at 600 ℃ and 700 ℃ for 30 minutes;
a third stage: the temperature is 700 ℃ and 800 ℃ for 60 minutes.
5. The method for preparing the high-efficiency NA-X molecular sieve of claim 4, wherein in step S7, the glue solution is a seaweed glue solution.
6. The spraying equipment comprises a spraying box body (1), and is characterized in that first fixing blocks (2) are fixedly connected to two sides of the spraying box body (1), a rubber block (3) is fixedly mounted on each first fixing block (2), a plurality of first grooves (301) are formed in each rubber block (3), through grooves (302) are formed in the first grooves (301), and a shaking mechanism for driving the rubber blocks (3) to shake is arranged in the spraying box body (1);
fixed mounting has fourth fixed block (17) and two guide arms (18) in spraying box (1), sliding connection has motion piece (19) on guide arm (18), motion piece (19) bottom fixedly connected with fixed plate (20), fixed plate (20) bottom fixed mounting has a plurality of shower nozzles (21), shower nozzle (21) can spout the glue solution, be equipped with the actuating mechanism of drive motion piece (19) motion in spraying box (1).
7. The spraying equipment according to claim 6, characterized in that the driving mechanism comprises a cylinder (12), a first connecting rod (15) is rotatably mounted on the fourth fixing block (17), a second connecting rod (16) is rotatably mounted on the moving block (19), the free end of the second connecting rod (16) is rotatably mounted with the free end of the first connecting rod (15), a mounting block (14) is fixedly connected to the first connecting rod (15), a second groove (1401) is formed in the mounting block (14), a cylinder (12) is fixedly mounted in the spraying box body (1), and a sliding rod (13) which slides in the second groove (1401) is fixedly mounted on the piston rod of the cylinder (12).
8. The spraying equipment according to claim 7, wherein the shaking mechanism comprises a lifting rod (5), a mounting box (4) is fixedly mounted below the rubber block (3), a second fixing block (6) is fixedly mounted in the mounting box (4), the lifting rod (5) moving in the vertical direction is slidably connected in the second fixing block (6), the top of the lifting rod (5) is in contact with the bottom of the rubber block (3), a driving motor (11) is fixedly mounted in the mounting box (4), and the driving motor (11) drives the lifting rod (5) to reciprocate in the vertical direction through a transmission assembly.
9. The spraying equipment according to claim 8, wherein the transmission assembly comprises an elliptical disc (10), the elliptical disc (10) is connected to an output shaft of the driving motor (11) in a transmission manner, the bottom of the lifting rod (5) is hemispherical, the bottom of the lifting rod (5) is abutted to the top of the elliptical disc (10), a third fixing block (8) is fixedly mounted in the installation box (4), a limiting block (9) is fixedly connected to the outer side of the lifting rod (5), and the third fixing block (8) is elastically connected with the limiting block (9) through a spring (7).
10. A method of using a spray coating device, comprising the steps of:
s1, pouring a molecular sieve semi-finished product D on the rubber block (3);
s2, starting a driving motor (11) to rotate to drive an elliptical disc (10) to rotate, wherein the bottom of a lifting rod (5) is abutted against the top of the elliptical disc (10), the lifting rod (5) is driven to reciprocate in the vertical direction through the elliptical disc (10) and a spring (7), and the top of the lifting rod (5) is contacted with the bottom of a rubber block (3) to drive the rubber block (3) to shake;
s3, spraying glue solution on the surface of the molecular sieve semi-finished product D on the rubber block (3) by the spray head (21), starting the cylinder (12) to extend the piston rod, sliding the sliding rod (13) in the second groove (1401) to drive the first connecting rod (15) to rotate, driving the moving block (19) to move and keep away from the fourth fixed block (17) by the second connecting rod (16), starting the cylinder (12) to retract the piston rod, sliding the sliding rod (13) in the second groove (1401) to drive the first connecting rod (15) to rotate, driving the moving block (19) to move and be close to the fourth fixed block (17) by the second connecting rod (16), and further adjusting the position of the spray head (21) to spray the glue solution on the surface of the molecular sieve semi-finished product D on the rubber block (3) to obtain the molecular sieve semi-finished product E with the surface treated.
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