CN114988406A - Preparation process of water-resistant honeycomb activated carbon - Google Patents
Preparation process of water-resistant honeycomb activated carbon Download PDFInfo
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- CN114988406A CN114988406A CN202210881302.9A CN202210881302A CN114988406A CN 114988406 A CN114988406 A CN 114988406A CN 202210881302 A CN202210881302 A CN 202210881302A CN 114988406 A CN114988406 A CN 114988406A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000003245 coal Substances 0.000 claims abstract description 67
- 239000011280 coal tar Substances 0.000 claims abstract description 58
- 239000000843 powder Substances 0.000 claims abstract description 23
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004927 clay Substances 0.000 claims abstract description 9
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical group O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000005011 phenolic resin Substances 0.000 claims abstract description 9
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 9
- 241000264877 Hippospongia communis Species 0.000 claims description 67
- 239000007864 aqueous solution Substances 0.000 claims description 21
- 239000003995 emulsifying agent Substances 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 17
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 239000002802 bituminous coal Substances 0.000 claims description 14
- 238000004939 coking Methods 0.000 claims description 14
- 239000003077 lignite Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 11
- 238000000465 moulding Methods 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 230000000630 rising effect Effects 0.000 claims description 10
- 230000003213 activating effect Effects 0.000 claims description 9
- 238000010000 carbonizing Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000003763 carbonization Methods 0.000 claims description 7
- 238000004945 emulsification Methods 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 238000004898 kneading Methods 0.000 claims description 7
- 239000003381 stabilizer Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000004094 surface-active agent Substances 0.000 claims description 7
- 239000003232 water-soluble binding agent Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000010426 asphalt Substances 0.000 claims description 5
- 239000003607 modifier Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 239000003250 coal slurry Substances 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- -1 alcohol aldehydes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/33—Preparation characterised by the starting materials from distillation residues of coal or petroleum; from petroleum acid sludge
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/342—Preparation characterised by non-gaseous activating agents
- C01B32/348—Metallic compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a preparation process of water-resistant honeycomb activated carbon, which is characterized in that the activated carbon is rich in microporous structures, and the honeycomb activated carbon is prepared by adopting a combined formula ratio of coal powder, emulsified coal tar, water, a water-soluble adhesive, phenolic resin, clay and furfural residues, so that the pore structures formed by the carbonized and activated carbon are more abundant, and the adsorption efficiency is enhanced.
Description
Technical Field
The invention relates to the technical field of activated carbon preparation, in particular to a water-resistant honeycomb activated carbon preparation process.
Background
The waterproof honeycomb activated carbon is prepared by performing waterproof treatment and secondary firing after being discharged from a furnace, has the characteristics of higher strength, water resistance, strong acid resistance and strong alkali resistance, can be widely used for wastewater treatment and organic solvent recovery and adsorption, has larger area and higher adsorption iodine value when being used as carriers of various catalysts, and is a product of high-surface activated carbon and widely applied to air pollution control.
The waterproof honeycomb activated carbon adsorption method is that the waste gas contacts with porous activated carbon with a large surface, and pollutants in the waste gas are adsorbed and decomposed, so that the purification effect is achieved.
The method is widely applied to various organic waste gas purification systems with low concentration and large air volume. The treated waste gas can fully contact with the active carbon when passing through the square holes of the waterproof honeycomb active carbon, has small wind resistance coefficient, excellent adsorption and desorption properties and gas dynamic properties, and can be widely used for purifying and treating organic gases containing toluene, dimethylbenzene, benzene, and other benzenes, phenols, lipids, alcohol aldehydes, and the like, malodorous gases and various gases containing trace metals.
But because the existing water-resistant honeycombs are different in preparation process and formula ratio, the adsorption capacity of some activated carbons is not high.
Disclosure of Invention
The invention aims to solve the problems of the background technology and provides a preparation process of water-resistant honeycomb activated carbon.
The purpose of the invention can be realized by the following technical scheme:
a preparation process of water-resistant honeycomb activated carbon comprises the following steps: s1, preparing coal powder: respectively crushing lignite or bituminous coal and coking coal to be less than 2 mm, and then mixing the lignite or bituminous coal: the coking coal is 1: 0.2-0.5, grinding to below 74 microns to obtain uniformly mixed coal powder;
s2, preparing emulsified coal tar: preheating high-temperature coal tar with the asphalt content of more than or equal to 55 percent to 130-145 ℃;
adding a surfactant accounting for 3-5% of the mass of the high-temperature coal tar and a stabilizer accounting for 0.8-1.7% of the mass of the high-temperature coal tar into water, and preheating to 80-90 ℃ to form an emulsifier aqueous solution;
high-temperature coal tar according to the mass ratio: emulsifier aqueous solution ═ 1: 0.3-0.7, under the condition of stirring,
adding high-temperature coal tar into an emulsifier aqueous solution to prepare emulsified coal tar;
s3, taking coal powder according to the mass ratio: coal tar emulsification: water: water-soluble binder: phenolic resin: clay: 30-57 of furfural residue: 30-36: 6-15: 3-5: 1-5:1-5:5-10, adding the mixture into a kneading machine, and uniformly stirring to prepare plastic coal slime;
s4, mixing and filtering the coal slurry prepared in the S3;
s5, carrying out extrusion forming treatment on the coal slime treated in the S4 to obtain a wet honeycomb body;
drying the honeycombs obtained in S6 and S5, carbonizing and activating the honeycombs, and finally obtaining the activated carbon.
As a further scheme of the invention: the mixing and filtering in the S4 are respectively specifically as follows: the plastic coal slime is treated by a vacuum pugging machine or an extrusion forming machine to uniformly mix the coal slime, and then large granular substances are filtered and removed in a 60-100 mesh wire net in the forming machine.
As a further scheme of the invention: the extrusion molding treatment in the S5 is specifically as follows: and adding the coal slime subjected to pugging treatment into an extrusion molding machine provided with a honeycomb steel mold, and molding to obtain a wet honeycomb body.
As a further scheme of the invention: in S6, the drying treatment is to dry the honeycomb body through a tunnel furnace, and the moisture content is controlled to be 1-3%.
As a further scheme of the invention: in the carbonization treatment in S6, nitrogen is used as protective gas, the honeycomb body is heated to 800-870 ℃ at the temperature rising speed of 3-6 ℃/Min, and the honeycomb body is carbonized for 3 hours after the temperature is stable.
As a further scheme of the invention: in the activation treatment in S6, nitrogen is used as protective gas, the honeycomb body after carbonization treatment is heated to 800-900 ℃ at the temperature rising speed of 8-10 ℃/Min, and then the honeycomb body is activated for 5-10 hours by using sodium hydroxide and methanol modifier.
The invention has the beneficial effects that:
because the activated carbon has rich microporous structures, the honeycomb activated carbon is prepared by adopting a combined formula ratio of coal powder, emulsified coal tar, water, a water-soluble adhesive, phenolic resin, clay and furfural residues, so that the pore structures formed by the carbonized and activated carbon are richer, and the adsorption efficiency is enhanced.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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.
The first embodiment of the invention relates to a preparation process of water-resistant honeycomb activated carbon, which comprises the following steps: s1, preparing coal powder: respectively crushing lignite or bituminous coal and coking coal to be less than 2 mm, and then mixing the lignite or bituminous coal: the coking coal is 1: 0.2, grinding to below 74 microns to obtain uniformly mixed coal powder;
s2, preparing emulsified coal tar: preheating high-temperature coal tar with the pitch content of more than or equal to 55% to 130 ℃;
adding a surfactant accounting for 3% of the mass of the high-temperature coal tar and a stabilizer accounting for 0.8% of the mass of the high-temperature coal tar into water, and preheating to 80 ℃ to form an emulsifier aqueous solution;
high-temperature coal tar according to the mass ratio: emulsifier aqueous solution ═ 1: 0.3, adding high-temperature coal tar into an emulsifier aqueous solution under the stirring condition to prepare emulsified coal tar;
s3, preparing coal powder according to the mass ratio: coal tar emulsification: water: water-soluble binder: phenolic resin: clay: 30 parts of furfural residues: 30: 6: 3: 1:1:5, adding the mixture into a kneading machine, and uniformly stirring to prepare plastic coal slime;
s4, processing the plastic coal slime through a vacuum pugging machine or an extrusion forming machine to uniformly mix the coal slime, and filtering and removing large-particle substances in a 60-mesh wire mesh in the forming machine;
s5, adding the pugging treated coal slime into an extrusion molding machine provided with a honeycomb steel mold, and molding to obtain a wet honeycomb body;
drying the honeycombs obtained in S6 and S5, carbonizing and activating to obtain the activated carbon.
Wherein, the drying treatment is that the honeycomb body is dried by a tunnel furnace, and the moisture content is controlled to be 1 percent.
Wherein, the carbonization treatment takes nitrogen as protective gas, the honeycomb body is heated to 800 ℃ at the temperature rising speed of 3 ℃/Min, and the honeycomb body is carbonized for 3 hours after the temperature is stable.
Wherein, the activating treatment is to heat the carbonized honeycomb body to 800 ℃ at the temperature rising speed of 8 ℃/Min by taking nitrogen as protective gas, and then to activate the honeycomb body for 5 hours by using sodium hydroxide and methanol modifier.
The second embodiment is a preparation process of water-resistant honeycomb activated carbon, which comprises the following steps: s1, preparing coal powder: respectively crushing lignite or bituminous coal and coking coal to be less than 2 mm, and then mixing the lignite or bituminous coal: the coking coal is 1: 0.5, grinding to below 74 microns to obtain uniformly mixed coal powder;
s2, preparing emulsified coal tar: preheating high-temperature coal tar with the asphalt content of more than or equal to 55% to 145 ℃;
adding a surfactant accounting for 5% of the mass of the high-temperature coal tar and a stabilizer accounting for 1.7% of the mass of the high-temperature coal tar into water, and preheating to 90 ℃ to form an emulsifier aqueous solution;
high-temperature coal tar according to the mass ratio: emulsifier aqueous solution ═ 1: 0.7, adding high-temperature coal tar into an emulsifier aqueous solution under the stirring condition to prepare emulsified coal tar;
s3, preparing coal powder according to the mass ratio: coal tar emulsification: water: water-soluble binder: phenolic resin: clay: and (4) taking furfural residue as 57: 36: 15: 5:5: 5:10, adding the mixture into a kneading machine, and uniformly stirring to prepare plastic coal slime;
s4, processing the plastic coal slime through a vacuum pugging machine or an extrusion molding machine to uniformly mix the coal slime, and filtering and removing large-particle substances in a 100-mesh wire mesh in the molding machine;
s5, adding the pugging treated coal slime into an extrusion molding machine provided with a honeycomb steel mold, and molding to obtain a wet honeycomb body;
drying the honeycombs obtained in S6 and S5, carbonizing and activating to obtain the activated carbon.
Wherein, the drying treatment is that the honeycomb body is dried by a tunnel furnace, and the moisture content is controlled to be 1 percent.
Wherein, the carbonization treatment takes nitrogen as protective gas, the honeycomb body is heated to 870 ℃ at the temperature rise speed of 6 ℃/Min, and the honeycomb body is carbonized for 3 hours after the temperature is stable.
Wherein, the activating treatment is to heat the carbonized honeycomb body to 900 ℃ at the temperature rising speed of 10 ℃/Min by taking nitrogen as protective gas, and then activate the honeycomb body for 10 hours by using sodium hydroxide and methanol modifier.
In the third embodiment, a preparation process of the water-resistant honeycomb activated carbon comprises the following steps: s1, preparing coal powder: respectively crushing lignite or bituminous coal and coking coal to be less than 2 mm, and then mixing the lignite or bituminous coal: the coking coal is 1: 0.3, grinding to below 74 microns to obtain uniformly mixed coal powder;
s2, preparing emulsified coal tar: preheating high-temperature coal tar with the asphalt content of more than or equal to 55% to 140 ℃;
adding a surfactant accounting for 4% of the mass of the high-temperature coal tar and a stabilizer accounting for 1% of the mass of the high-temperature coal tar into water, and preheating to 85 ℃ to form an emulsifier aqueous solution;
high-temperature coal tar according to the mass ratio: emulsifier aqueous solution ═ 1: 0.5, adding high-temperature coal tar into an emulsifier aqueous solution under the stirring condition to prepare emulsified coal tar;
s3, preparing coal powder according to the mass ratio: coal tar emulsification: water: water-soluble binder: phenolic resin: clay: and (3) furfural residue is 40: 33: 10: 4: 3:3:7, adding the mixture into a kneading machine, and uniformly stirring to prepare plastic coal slime;
s4, processing the plastic coal slime through a vacuum pugging machine or an extrusion molding machine to uniformly mix the coal slime, and filtering and removing large-particle substances in a 70-mesh wire mesh in the molding machine;
s5, adding the pugging treated coal slime into an extrusion molding machine provided with a honeycomb steel mold, and molding to obtain a wet honeycomb body;
drying the honeycombs obtained in S6 and S5, carbonizing and activating to obtain the activated carbon.
Wherein, the drying treatment is that the honeycomb body is dried by a tunnel furnace, and the moisture content is controlled to be 1 percent.
Wherein, the carbonization treatment takes nitrogen as protective gas, the honeycomb body is heated to 850 ℃ at the temperature rising speed of 4 ℃/Min, and the honeycomb body is carbonized for 3 hours after the temperature is stable.
Wherein, the activating treatment is to heat the honeycomb body after the carbonizing treatment to 850 ℃ at the temperature rising speed of 7 ℃/Min by taking nitrogen as protective gas, and then activate the honeycomb body for 7 hours by using sodium hydroxide and a methanol modifier.
The fourth embodiment provides a preparation process of water-resistant honeycomb activated carbon, which comprises the following steps: s1, preparing coal powder: respectively crushing lignite or bituminous coal and coking coal to be less than 2 mm, and then mixing the lignite or bituminous coal: the coking coal is 1: 0.3, grinding to below 74 microns to obtain uniformly mixed coal powder;
s2, preparing emulsified coal tar: preheating high-temperature coal tar with the pitch content of more than or equal to 55% to 140 ℃;
adding a surfactant accounting for 4% of the mass of the high-temperature coal tar and a stabilizer accounting for 1% of the mass of the high-temperature coal tar into water, and preheating to 85 ℃ to form an emulsifier aqueous solution;
high-temperature coal tar according to the mass ratio: emulsifier aqueous solution ═ 1: 0.5, adding high-temperature coal tar into an emulsifier aqueous solution under the stirring condition to prepare emulsified coal tar;
s3, taking coal powder according to the mass ratio: coal tar emulsification: water: water-soluble binder: phenolic resin: clay: and (3) furfural residue is 40: 33: 10: 4: 3:3:7, adding the mixture into a kneading machine, and uniformly stirring to prepare plastic coal slime;
s4, processing the plastic coal slime through a vacuum pugging machine or an extrusion molding machine to uniformly mix the coal slime, and filtering and removing large-particle substances in a 70-mesh wire mesh in the molding machine;
s5, adding the pugging treated coal slime into an extrusion molding machine provided with a honeycomb steel mold, and molding to obtain a wet honeycomb body;
s6, drying the wet honeycomb until the moisture content is lower than 2%; taking inert gas as protective gas, heating to 600 ℃ at the heating rate of 3 ℃/min, and carbonizing for 2 hours at the temperature; then the temperature is raised to 750 ℃ at the temperature raising speed of 5 ℃/min, and the mixture is activated for 3 hours by water vapor.
Embodiment five, a preparation technology of water-resistant honeycomb activated carbon, includes the following steps: s1, preparing coal powder: respectively crushing lignite or bituminous coal and coking coal to be less than 2 mm, and then mixing the lignite or bituminous coal: the coking coal is 1: 0.3, grinding to below 74 microns to obtain uniformly mixed coal powder;
s2, preparing emulsified coal tar: preheating high-temperature coal tar with the asphalt content of more than or equal to 55% to 140 ℃;
adding a surfactant accounting for 4% of the mass of the high-temperature coal tar and a stabilizer accounting for 1% of the mass of the high-temperature coal tar into water, and preheating to 85 ℃ to form an emulsifier aqueous solution;
high-temperature coal tar according to the mass ratio: emulsifier aqueous solution ═ 1: 0.5, adding high-temperature coal tar into an emulsifier aqueous solution under the stirring condition to prepare emulsified coal tar;
s3, preparing coal powder according to the mass ratio: coal tar emulsification: water: water-soluble binder: phenolic resin: clay: and (3) furfural residue is 40: 33: 10: 4: 3:3:7, adding the mixture into a kneading machine, and uniformly stirring to prepare plastic coal slime;
s4, processing the plastic coal slime through a vacuum pugging machine or an extrusion molding machine to uniformly mix the coal slime, and then filtering and removing large-particle substances in a 70-mesh wire mesh in the molding machine;
s5, adding the pugging treated coal slime into an extrusion molding machine provided with a honeycomb steel mold, and molding to obtain a wet honeycomb body;
s6, drying the wet honeycomb until the moisture content is lower than 2%; taking inert gas as protective gas, heating to 800 ℃ at the temperature rising speed of 5 ℃/min, and carbonizing for 3 hours at the temperature; then heating to 850 ℃ at a heating rate of 15 ℃/min, and activating for 15 hours by using water vapor.
Although one embodiment of the present invention has been described in detail, the description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (6)
1. A preparation process of water-resistant honeycomb activated carbon is characterized by comprising the following steps: s1, preparing coal powder: respectively crushing lignite or bituminous coal and coking coal to be less than 2 mm, and then mixing the lignite or bituminous coal: the coking coal is 1: 0.2-0.5, and grinding to below 74 micrometers to obtain uniformly mixed coal powder;
s2, preparing emulsified coal tar: preheating high-temperature coal tar with the asphalt content of more than or equal to 55% to 130-145 ℃;
adding a surfactant accounting for 3-5% of the mass of the high-temperature coal tar and a stabilizer accounting for 0.8-1.7% of the mass of the high-temperature coal tar into water, and preheating to 80-90 ℃ to form an emulsifier aqueous solution;
high-temperature coal tar according to the mass ratio: emulsifier aqueous solution ═ 1: 0.3-0.7, under the condition of stirring, adding high-temperature coal tar into emulsifier aqueous solution to prepare emulsified coal tar;
s3, preparing coal powder according to the mass ratio: coal tar emulsification: water: water-soluble binder: phenolic resin: clay: 30-57 of furfural residue: 30-36: 6-15: 3-5: 1-5:1-5:5-10, adding the mixture into a kneading machine, and uniformly stirring to prepare plastic coal slime;
s4, mixing and filtering the coal slurry prepared in the S3;
s5, carrying out extrusion forming treatment on the coal slime treated in the S4 to obtain a wet honeycomb body;
drying the honeycombs obtained in S6 and S5, carbonizing and activating to obtain the activated carbon.
2. The preparation process of the water-resistant honeycomb activated carbon according to claim 1, wherein the mixing and filtering in the S4 are respectively specifically: the plastic coal slime is treated by a vacuum pugging machine or an extrusion forming machine to uniformly mix the coal slime, and then large granular substances are filtered and removed in a 60-100 mesh wire net in the forming machine.
3. The preparation process of the water-resistant honeycomb activated carbon according to claim 1, wherein the extrusion molding treatment in S5 specifically comprises the following steps: and adding the pugging treated coal slime into an extrusion molding machine provided with a honeycomb steel mold, and molding to obtain a wet honeycomb body.
4. The process of claim 1, wherein the drying step S6 is carried out by drying the honeycomb body in a tunnel furnace to control the water content at 1-3%.
5. The preparation process of the water-resistant honeycomb activated carbon as claimed in claim 1, wherein the carbonization treatment in S6 is carried out by heating the honeycomb body to 800-870 ℃ at a temperature rising rate of 3-6 ℃/Min with nitrogen as a shielding gas, and then carbonizing for 3 hours after the temperature is stabilized.
6. The preparation process of the water-resistant honeycomb activated carbon as claimed in claim 1 or 5, wherein in the activation treatment in S6, nitrogen is used as a protective gas, the honeycomb body after the carbonization treatment is heated to 800-900 ℃ at a temperature rising speed of 8-10 ℃/Min, and then the honeycomb body is activated by sodium hydroxide and a methanol modifier for 5-10 hours.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116459791A (en) * | 2023-04-26 | 2023-07-21 | 福建省鑫森炭业股份有限公司 | Filter material based on honeycomb activated carbon and preparation method and application thereof |
| CN117088367A (en) * | 2023-10-19 | 2023-11-21 | 广东韩研活性炭科技股份有限公司 | Activated carbon for sewage treatment and preparation method thereof |
Citations (5)
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| CN117088367B (en) * | 2023-10-19 | 2023-12-29 | 广东韩研活性炭科技股份有限公司 | Activated carbon for sewage treatment and preparation method thereof |
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