CN111617749A - Preparation method of honeycomb molecular sieve adsorption section bar - Google Patents
Preparation method of honeycomb molecular sieve adsorption section bar Download PDFInfo
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- CN111617749A CN111617749A CN202010625936.9A CN202010625936A CN111617749A CN 111617749 A CN111617749 A CN 111617749A CN 202010625936 A CN202010625936 A CN 202010625936A CN 111617749 A CN111617749 A CN 111617749A
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- molecular sieve
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- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 239000002808 molecular sieve Substances 0.000 title claims abstract description 77
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 13
- 239000012784 inorganic fiber Substances 0.000 claims abstract description 50
- 239000002002 slurry Substances 0.000 claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 239000002562 thickening agent Substances 0.000 claims abstract description 5
- 239000011230 binding agent Substances 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 238000004804 winding Methods 0.000 claims abstract description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 20
- 239000011734 sodium Substances 0.000 claims description 20
- 229910052708 sodium Inorganic materials 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 10
- 239000011575 calcium Substances 0.000 claims description 10
- 229910052791 calcium Inorganic materials 0.000 claims description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052680 mordenite Inorganic materials 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- 229920003086 cellulose ether Polymers 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- 239000011118 polyvinyl acetate Substances 0.000 claims description 3
- 229920002689 polyvinyl acetate Polymers 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 239000003463 adsorbent Substances 0.000 claims 8
- 239000012855 volatile organic compound Substances 0.000 description 16
- 239000011148 porous material Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000005507 spraying Methods 0.000 description 6
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 5
- 238000007598 dipping method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000002386 leaching Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000008096 xylene Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 230000000274 adsorptive effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 231100000570 acute poisoning Toxicity 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 231100000739 chronic poisoning Toxicity 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229940093499 ethyl acetate Drugs 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 210000002216 heart Anatomy 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-M hexanoate Chemical compound CCCCCC([O-])=O FUZZWVXGSFPDMH-UHFFFAOYSA-M 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- -1 methoxypropyl ester Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 229940078552 o-xylene Drugs 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 210000001835 viscera Anatomy 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
- B01J20/28042—Shaped bodies; Monolithic structures
- B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/16—Alumino-silicates
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3042—Use of binding agents; addition of materials ameliorating the mechanical properties of the produced sorbent
-
- 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/116—Molecular sieves other than zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/34—Specific shapes
- B01D2253/342—Monoliths
- B01D2253/3425—Honeycomb shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
Abstract
The invention discloses a preparation method of a honeycomb molecular sieve adsorption profile, which comprises the following steps: s1, uniformly dispersing the inorganic molecular sieve in the inorganic adhesive to obtain slurry 1; s2, adding a thickening agent and an organic binder into the slurry 1 to obtain slurry 2; s3 uniformly adhering the slurry 1 to an inorganic fiber paper and forming it into a wave shape; s4, uniformly adhering the slurry 2 on the inorganic fiber paper to obtain wet inorganic fiber paper; s5, alternately stacking and stacking the wavy inorganic fiber paper obtained in S3 and the wet inorganic fiber paper obtained in S4 or winding the wavy inorganic fiber paper and the wet inorganic fiber paper to obtain a honeycomb-shaped molecular sieve section; and (5) after the honeycomb molecular sieve sectional material obtained by S6 is completely dried, sintering to remove organic impurities to obtain a finished product. The invention combines the drying step in the preparation process and the drying step of sticking the molecular sieve on the section bar into a whole, and provides a more convenient, rapid and energy-saving mode for producing the honeycomb-shaped molecular sieve section bar with controllable size and one or more molecular sieves combined.
Description
Technical Field
The invention relates to the field of waste gas treatment, in particular to a preparation method of a honeycomb molecular sieve adsorption profile.
Background
The harm of overproof emission of Volatile Organic Compounds (VOCs) is mainly shown in two aspects: firstly, most of VOC is toxic and has foul smell, has stimulation to eyes, nose and respiratory tract of people, has harmful influence on internal organs and nervous systems such as heart, lung, liver and the like, even causes acute and chronic poisoning, can cause cancer and mutation; secondly, VOC can destroy the ozone layer of the atmosphere, generate photochemical smog and cause atmosphere acidification. VOCs are mainly produced in the production process of industries such as coating, packaging printing, pharmacy, electronic manufacturing and the like. VOCs emission characteristics of different industries are greatly different, wherein VOCs generated in a spraying link has large air quantity and low concentration, and the main components are toluene, xylene, ethylbenzene and the like; VOCs produced by packaging and printing has moderate air quantity and concentration, and the main components are o-xylene, propyl acetate, ethyl acetate and the like; VOCs produced in the pharmaceutical process has low concentration and high humidity, is discharged in an unsteady state, and mainly contains ethanol; VOCs generated in the electronic manufacturing process have large air volume and low concentration, and the main components of the VOCs are butyl acetate, isopropanol, methoxypropyl ester and the like. The VOCs have complex components and require molecular sieves with rich pore sizes for adsorption treatment.
Patent CN105363411A discloses a preparation method of honeycomb-shaped molecular sieve adsorption profile, firstly, fiber paper is prepared into honeycomb-shaped profile, then molecular sieve material is uniformly adhered on the profile, but because the width of honeycomb pore channel is small, there is risk of pore blocking when molecular sieve material is adhered on the profile, this will greatly affect the adsorption efficiency of VOCs, therefore, the size of the molecular sieve profile prepared by this method has certain limitation, which is not beneficial to the popularization of VOCs generated in different industries.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the background art, the invention discloses a production method of a honeycomb molecular sieve adsorption profile, which combines the drying step in the profile preparation process and the drying step of sticking a molecular sieve on the profile into a whole.
The technical scheme is as follows: the preparation method of the honeycomb molecular sieve adsorption section bar comprises the following steps:
s1, uniformly dispersing the inorganic molecular sieve in the inorganic adhesive to obtain slurry 1;
s2 adding a thickener and/or an organic binder to the slurry 1 to obtain a slurry 2;
s3 uniformly adhering the slurry 1 to an inorganic fiber paper and forming it into a wave shape;
s4, uniformly adhering the slurry 2 on the inorganic fiber paper to obtain wet inorganic fiber paper;
s5, alternately stacking and stacking the wavy inorganic fiber paper obtained in S3 and the wet inorganic fiber paper obtained in S4 or winding the wavy inorganic fiber paper and the wet inorganic fiber paper to obtain a honeycomb-shaped molecular sieve section;
and (5) after the honeycomb molecular sieve sectional material obtained by S6 is completely dried, sintering to remove organic impurities to obtain a finished product.
Wherein the inorganic molecular sieve in S1 is one or more of 3A (potassium A type), 4A (sodium A type), 5A (calcium A type), 10Z (calcium Z type), 13Z (sodium Z type), Y (sodium Y type), sodium mordenite type, MFI type and modified molecular sieve.
Further, in S1, the inorganic adhesive may be one or more of a silica sol, an alumina sol, a titania sol, and a phosphate solution.
Further, the S thickener in S2 is one of diatomite and silica gel, and the organic binder is one or more of cellulose ether, polyvinyl alcohol and polyvinyl acetate emulsion.
Further, the slurry is adhered to the surface of the inorganic fiber paper by dipping, spraying or rinsing in S3 and S4.
Further, the structure of the wavy inorganic fiber material in S3 is that the channels are parallel to each other, the height of the channel is 1-35mm, and the width is 2-70 mm.
Further, the wet inorganic fiber paper in S4 has a dewatered grammage of 80 to 350g/m2The thickness is 0.2-0.35 mm.
Further, in S5, the wavy inorganic fiber paper and the wet inorganic fiber paper are stacked alternately and stacked or wound with the channels of the wavy inorganic fiber paper being parallel to each other.
Furthermore, the drying temperature in S6 is 120-150 ℃, and the sintering temperature is 500-900 ℃.
Has the advantages that: compared with the prior art, the invention has the advantages that: firstly, the drying step in the preparation process of the invention is combined with the drying step of the molecular sieve sticking on the section bar, thereby saving the investment of equipment, reducing the energy consumption of production, and having simple, convenient and quick production process; secondly, the proportion of the adhesive, the adhesion promoter and the molecular sieve is researched, so that the adhesive is uniformly adhered to the molecular sieve sectional material, the adsorptive molecular sieve sectional material cannot flow in the drying process, the honeycomb blockage is effectively prevented, and the preparation size of the molecular sieve adsorptive sectional material is regulated and controlled; meanwhile, the invention combines one or more molecular sieves, realizes rich pore diameters of the honeycomb molecular sieve adsorption section bar, and further realizes popularization and application of treating VOCs generated in different industries.
Drawings
FIG. 1 is a schematic structural view of a honeycomb molecular sieve block of the present invention;
FIG. 2 is a graph of structural strength performance of the honeycomb molecular sieve block obtained in example 1;
fig. 3 is a schematic structural view of a honeycomb molecular sieve wheel of the present invention.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1:
a preparation method of a honeycomb molecular sieve adsorption profile comprises the following steps:
s1 preparation of slurry 1: uniformly mixing 3A (potassium A type), 4A (sodium A type), 5A (calcium A type), 10Z (calcium Z type), 13Z (sodium Z type), Y (sodium Y type), sodium mordenite type molecular sieves with the particle size of 10 mu m and silica sol to obtain slurry 1; wherein the silica sol has a solid content of 25%.
S2 preparation of slurry 2: adding 5 per mill polyvinyl alcohol and diatomite into the slurry 1, and stirring at high speed for 60min to obtain slurry 2.
S3, uniformly coating the slurry 1 on inorganic fiber paper with the thickness of 0.15mm and the width of 420mm by means of dipping, spraying, leaching and the like, and pressing the inorganic fiber paper into a corrugated paper, namely the corrugated inorganic fiber paper 12, in a wavy shape as shown in figure 1 by a corrugating device, wherein the height of a pore channel is 1mm, and the width of the pore channel is 2 mm.
S4 slurry 2 is uniformly coated on inorganic fiber paper with thickness of 0.15mm and width of 420mm by dipping, spraying, leaching and the like to obtain flat paper as shown in figure 1, namely flat inorganic fiber paper 11 loaded with adhesive, and the gram weight after dehydration is 80g/m2The thickness is 0.2 mm.
S5 according to the structure shown in FIG. 1, the corrugated paper in S3 and the flat paper in S4 are alternately stacked and stacked or wound, and the channels of the wavy inorganic fiber paper are kept parallel to each other, so as to obtain a honeycomb-shaped molecular sieve block or runner, and in the process, pressure can be properly increased above or around the section bar to ensure that the layers can be tightly bonded.
S6, drying the honeycomb molecular sieve block body by using hot air to bond the honeycomb molecular sieve block body, controlling the temperature of the hot air at 120 ℃, putting the dried honeycomb molecular sieve block body into an oven, heating to 600 ℃ by a program, baking for 4 hours, naturally cooling and taking out to obtain a finished molecular sieve block body;
the prepared honeycomb molecular sieve block structure is shown in fig. 1, the surfaces of the flat inorganic fiber paper 11 loaded with the adhesive and the wavy inorganic fiber paper 12 are loaded with 3A (potassium a type), 4A (sodium a type), 5A (calcium a type), 10Z (calcium Z type), 13Z (sodium Z type), Y (sodium Y type) and sodium mordenite type molecular sieves, and gas channels 13 through which VOCs can pass are formed between the molecular sieves.
Fig. 2 is a graph showing the structural strength performance of the honeycomb molecular sieve block obtained in this example. As can be seen from the figure, the prepared molecular sieve block has better compression resistance, and pressure is respectively applied to the three dimensions of the front surface, the side surface and the top surface of the molecular sieve block, so that the molecular sieve block is slightly deformed with the increase of the pressure, but the pressure is increased to 1kg/cm2When the deformation is about 1mm on three planes, the top surface has the best compression resistance and the shrinkage is only 0.6 mm.
Example 2:
the example uses a Y-modified molecular sieve for adsorbing xylene:
s1, uniformly mixing the high-hydrophobicity MFI molecular sieve and the customized Y-type modified molecular sieve for adsorbing xylene according to the ratio of 1:1, and mixing and stirring the mixed molecular sieve and alumina sol according to the ratio of 1:5 for 45min to obtain slurry 1.
And S2, adding 5 w.t.per mill of cellulose ether and silica gel, and stirring for 30min to obtain slurry 2, wherein the solid content of the alumina sol is 13 w.t.%.
S3 loading the glue solution on the surface of the high-temperature resistant inorganic fiber paper uniformly by repeated infiltration, and removing the redundant glue solution on the surface by extrusion, wherein the fiber length of the high-temperature resistant inorganic fiber paper is 10mm, and the gram weight is 200g/m2The thickness is 0.25mm, and the width is 420 mm.
S4, pressing the high-temperature resistant inorganic fiber paper partially loaded with the glue solution by a high-temperature corrugating machine to obtain a wavy section, wherein the height of a pore channel is 10mm, the width of the pore channel is 10mm, and the wavy section is bonded with the smooth high-temperature resistant inorganic fiber paper loaded with the glue solution to form the honeycomb molecular sieve rotating wheel.
S5, drying the honeycomb molecular sieve rotating wheel by using hot air to bond the honeycomb molecular sieve rotating wheel, controlling the temperature of the hot air to be 135 ℃, putting the dried honeycomb molecular sieve rotating wheel into an oven, heating the dried honeycomb molecular sieve rotating wheel to 500 ℃ by a program, baking the dried honeycomb molecular sieve rotating wheel for 4 hours, naturally cooling the dried honeycomb molecular sieve rotating wheel, and taking the dried honeycomb molecular sieve rotating wheel out to obtain the finished honeycomb molecular sieve rotating wheel, wherein the structure of the finished honeycomb.
Example 3:
a production method of honeycomb molecular sieve adsorption profiles comprises the following steps:
s1 preparation of slurry 1: uniformly mixing 3A (potassium A type), 4A (sodium A type), 5A (calcium A type), 10Z (calcium Z type), 13Z (sodium Z type), Y (sodium Y type), sodium mordenite type molecular sieves with the particle size of 2 mu m, titanium dioxide sol and phosphate solution according to the proportion of 1:6 to obtain slurry 1; wherein the solid content of the mixture of the titanium dioxide sol and the phosphate solution is 13 percent.
S2 preparation of slurry 2: and adding 7.5 per mill polyvinyl acetate emulsion and silica gel into the slurry 1, and stirring at high speed for 45min to obtain slurry 2.
S3, uniformly coating the slurry 1 on inorganic fiber paper with the thickness of 0.25mm and the width of 215mm in a dipping, spraying, leaching and other modes, pressing the inorganic fiber paper into a wavy shape by corrugating equipment, wherein the wavy inorganic fiber material is provided with parallel pore channels, the height of the pore channels is 35mm, and the width of the pore channels is 70 mm.
S4, uniformly coating the slurry 2 on inorganic fiber paper with the thickness of 0.25mm and the width of 215mm in a dipping, spraying, leaching and other modes to obtain flat inorganic fiber paper, wherein the dehydrated gram weight is 350g/m2And the thickness is 0.35 mm.
S5 corrugated paper and flat paper are stacked alternately to be stacked or wound, and a honeycomb molecular sieve block body with the length of 600mm and the height of 400mm is obtained.
S6, drying the honeycomb molecular sieve block body by using hot air to bond the honeycomb molecular sieve block body, controlling the temperature of the hot air at 150 ℃, putting the dried honeycomb molecular sieve block body into an oven, heating to 900 ℃ by a program, baking for 6 hours, naturally cooling and taking out to obtain the finished molecular sieve block body.
Claims (9)
1. The preparation method of the honeycomb molecular sieve adsorption profile is characterized by comprising the following steps of:
s1, uniformly dispersing the inorganic molecular sieve in the inorganic adhesive to obtain slurry 1;
s2, adding a thickening agent and an organic binder into the slurry 1 to obtain slurry 2;
s3 uniformly adhering the slurry 1 to an inorganic fiber paper and forming it into a wave shape;
s4, uniformly adhering the slurry 2 on the inorganic fiber paper to obtain wet inorganic fiber paper;
s5, alternately stacking and stacking the wavy inorganic fiber paper obtained in S3 and the wet inorganic fiber paper obtained in S4 or winding the wavy inorganic fiber paper and the wet inorganic fiber paper to obtain a honeycomb-shaped molecular sieve section;
and (5) after the honeycomb molecular sieve sectional material obtained by S6 is completely dried, sintering to remove organic impurities to obtain a finished product.
2. The method for preparing the honeycomb molecular sieve adsorbent profile of claim 1, wherein: the inorganic molecular sieve in S1 is one or more of 3A (potassium A type), 4A (sodium A type), 5A (calcium A type), 10Z (calcium Z type), 13Z (sodium Z type), Y (sodium Y type), sodium mordenite type, MFI type and modified molecular sieve.
3. The method for preparing the honeycomb molecular sieve adsorbent profile of claim 1, wherein: in the step S1, the inorganic adhesive is one or more of a silica sol, an alumina sol, a titania sol, and a phosphate solution.
4. The method for preparing the honeycomb molecular sieve adsorbent profile of claim 1, wherein: the thickener in S2 is one of diatomite and silica gel, and the organic adhesive is one or more of cellulose ether, polyvinyl alcohol and polyvinyl acetate emulsion.
5. The method for preparing the honeycomb molecular sieve adsorbent profile of claim 1, wherein: and S3 and S4 are dipped, sprayed or rinsed to adhere the slurry on the surface of the inorganic fiber paper.
6. The method for preparing the honeycomb molecular sieve adsorbent profile of claim 1, wherein: the structure of the wavy inorganic fiber material in S3 is the channels which are parallel to each other, the height of the channel is 1-35mm, and the width is 2-70 mm.
7. The method for preparing the honeycomb molecular sieve adsorbent profile of claim 1, wherein: the gram weight of the wet inorganic fiber paper in S4 after dehydration is 80-350g/m2The thickness is 0.2-0.35 mm.
8. The method for preparing the honeycomb molecular sieve adsorbent profile of claim 1, wherein: the wavy inorganic fiber paper and the wet inorganic fiber paper in S5 are stacked or wound alternately and the channels of the wavy inorganic fiber paper are parallel to each other.
9. The method for preparing the honeycomb molecular sieve adsorbent profile of claim 1, wherein: the drying temperature in S6 is 120-150 ℃, and the sintering temperature is 500-900 ℃.
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