Preparation method of high-adsorptive water-resistant honeycomb activated carbon

Abstract

The application discloses a preparation method of high-adsorption water-resistant honeycomb activated carbon. A phosphoric acid carbon semi-product activated at a high temperature is subjected to high-temperature heat treatment to obtain phosphoric acid carbon with high thermal stability; the phosphoric acid carbon is crushed and mixed with attapulgite, carboxymethyl cellulose, silica sol solution and the like at a certain proportion, kneaded, filtered and formed, and is subjected to shade drying, heat pump drying, low-temperature calcination to obtain the high-adsorption water-resistant honeycomb carbon. The phosphoric acid carbon is used as base carbon, and micropores of the phosphoric acid carbon are more developed than those of physical carbon, so that the honeycomb carbon prepared from the phosphoric acid carbon has higher adsorption performance. The phosphoric acid carbon semi-product activated at a high temperature is subjected to high-temperature heat treatment to obtain the phosphoric acid carbon with high thermal stability. A proper amount of carboxymethyl cellulose and silica sol is added in the process of manufacturing the honeycomb carbon to reduce the cracking rate of the honeycomb carbon in the drying and calcination processes. Circulating hot air is used in the drying process, so that the honeycomb carbon is uniformly heated, the cracking rate of the honeycomb carbon in the drying process is reduced, and the drying time is shortened. The honeycomb carbon is subjected to medium-temperature calcination, so that the shrinkage rate and the cracking rate of the honeycomb carbon in the calcination process are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of environmental protection, and particularly relates to a preparation method of high-adsorption water-resistant honeycomb activated carbon. BACKGROUND

[0002] Phosphoric acid carbon has high yield in the production process due to the particularity of its activation mechanism, and has higher iodine adsorption value and carbon tetrachloride adsorption rate because of higher micropores than conventional physical carbon. However, the specific gravity of conventional phosphoric acid carbon is low, and because the activation temperature is only 380-450 DEG C, the phosphoric acid carbon is prone to cracking during the process of making honeycomb carbon, especially during calcination. In addition, the surface of the phosphoric acid carbon contains a large number of acid groups, which makes the affinity between the phosphoric acid carbon and the clay for preparing honeycomb carbon poor. Based on these characteristics, conventional phosphoric acid carbon is difficult to be used as a raw material for preparing honeycomb carbon.

[0003] The honeycomb carbon on the market is mostly prepared by molding coal carbon and clay, conventional drying, and calcination at a high temperature of 700 DEG C or above. The coal carbon itself has poor adsorption, and it is difficult to prepare honeycomb carbon with high iodine adsorption value and high carbon tetrachloride adsorption rate. Because the conventional drying method makes the heating uneven and prone to cracking, a long time of 5-6 days of drying is required to prevent cracking. During the high-temperature calcination process, the shrinkage rate of the honeycomb carbon is high, and the cracking rate is high. SUMMARY

[0004] Therefore, the present application aims to provide a preparation method of high-adsorption water-resistant honeycomb activated carbon.

[0005] In order to achieve the above technical purposes, the technical scheme adopted by the present application is as follows:

[0006] A preparation method of high-adsorption water-resistant honeycomb activated carbon, comprising:

[0007] S1, wood and bamboo chips are screened according to 3-12 mesh components, and are mixed with phosphoric acid according to a first preset ratio to obtain a first mixture;

[0008] S2, the first mixture is carbonized and then activated to obtain a phosphoric acid carbon activation material;

[0009] S3, the phosphoric acid carbon activation material is gradiently recovered and washed with phosphoric acid and dried to obtain a phosphoric acid carbon semi-finished product;

[0010] S4, the phosphoric acid carbon semi-finished product is placed in an external heating converter into which inert gas is introduced, and is ground after high-temperature heat treatment to obtain a phosphoric acid carbon;

[0011] S5, the phosphoric acid carbon, attapulgite and carboxymethyl cellulose are mixed according to a second preset ratio, and a silicon sol solution with a preset concentration is added and kneaded for 20-30 min to obtain a second mixture;

[0012] S6, adding machine oil into the second mixture, and kneading for 10-30 min to obtain a honeycomb carbon kneaded material;

[0013] S7, placing the honeycomb carbon kneaded material in a roughing machine to obtain a cylindrical clay material, and then conveying the cylindrical clay material to a filter for filtering, and then conveying the filtered cylindrical clay material to a refining machine for multiple refining to obtain a cylindrical clay material;

[0014] S8, conveying the cylindrical clay material to an extrusion molding machine for extrusion molding to obtain a honeycomb wet blank;

[0015] S9, conveying the honeycomb wet blank to a shade drying room for shade drying to obtain a honeycomb shaped shaped blank;

[0016] S10, conveying the honeycomb shaped shaped blank to a drying room, slowly heating according to a preset temperature gradient by using circulating hot air to obtain a honeycomb shaped dry blank with a moisture content of less than 5%;

[0017] S11, placing the honeycomb shaped dry blank in an oxygen-free calcining furnace, slowly heating to a calcining temperature and maintaining the temperature, and waiting for natural cooling to room temperature to obtain a honeycomb shaped activated carbon.

[0018] In some embodiments, in step S1, the first preset ratio is in the range of 1:1.4-1:1.8, the phosphoric acid is obtained by a phosphoric acid solution, and the concentration of the phosphoric acid in the phosphoric acid solution is 50%-80%

[0019] In some embodiments, step S2 further comprises:

[0020] The first mixture is maintained at a carbonization temperature in the range of 250-350℃ for 20-60 min to obtain a carbonized mixture;

[0021] The carbonized mixture is maintained at an activation temperature in the range of 500-600℃ for 10-30 min to obtain a phosphoric acid carbon activation material.

[0022] In some embodiments, step S3 further comprises:

[0023] The phosphoric acid carbon activation material is washed to a pH of the carbon ≥2.5, and the phosphoric acid carbon activation material is dried to a moisture content ≤10%.

[0024] In some embodiments, step S4 further comprises:

[0025] Nitrogen is introduced into the external heating converter, the temperature of the external heating converter is maintained at 500-650℃, and the temperature is maintained for 0.5-1.5 h, the particle size of the powder is set to 200 mesh, and the passing rate is ≤5%.

[0026] In some embodiments, step S5 further comprises:

[0027] The phosphoric acid carbon, the attapulgite and the carboxymethyl cellulose are mixed according to the ratio of 100 parts of the phosphoric acid carbon, 40-60 parts of the attapulgite, 0.5-1.5 parts of the carboxymethyl cellulose, and 110-120 parts of the silica sol solution with the concentration of 1-2%.

[0028] Step S6 further comprises:

[0029] In the second mixture, 1 part of the machine oil is added, and the machine oil is gear oil.

[0030] In some embodiments, step S7 further comprises:

[0031] The cylindrical mud is transported to a filter with a mesh of 40-60 meshes for filtration, and is subjected to multiple times of refining mud in a refining mud machine with a vacuum degree of 0.08-0.1 MPa, and the number of times of refining mud is 1-3 times.

[0032] In some embodiments, step S9 further comprises:

[0033] The honeycomb-shaped wet blank is transported to a shade drying room with a temperature of 20-25 DEG C and a relative humidity of 50-70% for shade drying for 2-3 days.

[0034] In some embodiments, step S10 further comprises:

[0035] The circulating hot air of the drying room is provided by two heat pumps;

[0036] The drying conditions of the drying room are set as a temperature of 30-40 DEG C and a relative humidity of 85-95%, and the honeycomb-shaped setting blank is placed in the drying room for primary drying for 24 hours to obtain a primary dried blank;

[0037] The drying conditions of the drying room are set as a temperature of 40-50 DEG C and a relative humidity of 70-85%, and the primary dried blank is placed in the drying room for secondary drying for 24 hours to obtain a secondary dried blank;

[0038] The drying conditions of the drying room are set as a temperature of 50-60 DEG C and a relative humidity of 50-70%, and the secondary dried blank is placed in the drying room for tertiary drying for 24 hours to obtain a tertiary dried blank, and the tertiary dried blank is recorded as the honeycomb-shaped dried blank.

[0039] In some embodiments, step S11 further comprises:

[0040] The oxygen-free calcination furnace is controlled to slowly increase the temperature to a calcination temperature of 500-550 DEG C within 7-9 hours, and the temperature is maintained for 1-3 hours.

[0041] Compared with the prior art, the technical scheme has the beneficial effects that:

[0042] (1) Phosphate carbon is used as the base carbon. Due to the particularity of its activation mechanism, the mesopores of phosphate carbon are more developed than those of physical carbon. The iodine adsorption value of the honeycomb carbon prepared can be greater than 800 mg / g, and the carbon tetrachloride adsorption rate can be greater than 70%.

[0043] (2) The phosphate carbon is activated at a higher temperature than conventional phosphate carbon, and then acid recovered, washed, and dried. The resulting phosphate carbon semi-finished product is subjected to high-temperature heat treatment, which can significantly improve the thermal stability of the phosphate carbon and reduce the surface acidic groups of the phosphate carbon, making it less likely to shrink or crack during the production of honeycomb carbon.

[0044] (3) Add appropriate amount of carboxymethyl cellulose and silica sol during the production process of honeycomb charcoal to reduce the cracking rate of honeycomb charcoal during drying and calcination.

[0045] (4) The drying process of honeycomb charcoal adopts circulating hot air generated by two heat pumps to provide heating, so that the honeycomb charcoal in the drying room is heated evenly, reducing the cracking rate during the drying process and shortening the drying time.

[0046] (5) Honeycomb charcoal is calcined at a medium temperature of 500-550°C. This calcination temperature is more suitable for honeycomb charcoal made from phosphate carbon, which reduces the shrinkage and cracking rate of honeycomb charcoal during the calcination process. DETAILED DESCRIPTION

[0047] The present invention will be described in further detail below in conjunction with the examples. It is particularly noted that the following examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. Similarly, the following examples are only some embodiments of the present invention and not all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative work are intended to fall within the scope of protection of the present invention.

[0048] A method for preparing highly adsorbable and water-resistant honeycomb activated carbon, comprising:

[0049] S1. Screening wood and bamboo chips according to 3-12 mesh components, and mixing them with phosphoric acid according to a first preset ratio to obtain a first mixture;

[0050] S2, carbonizing and activating the first mixed material to obtain activated phosphate carbon material;

[0051] S3, performing gradient recovery washing of phosphoric acid on the activated carbon phosphate material and drying the same to obtain a carbon phosphate semi-finished product;

[0052] S4, placing the semi-finished carbon phosphate product in an externally heated converter into which an inert gas is introduced, and grinding the product after high-temperature heat treatment to obtain carbon phosphate;

[0053] S5, mixing carbon phosphate, attapulgite, and carboxymethyl cellulose according to a second preset ratio, adding a silica sol solution of a preset concentration and kneading for 20 minutes to obtain a second mixture;

[0054] S6, adding machine oil to the second mixture and kneading for 10 minutes to obtain a honeycomb carbon kneaded material;

[0055] S7, placing the honeycomb carbon kneaded material in a roughing machine to obtain a cylindrical clay material, and then conveying the cylindrical clay material to a filter for filtering, and then conveying the filtered cylindrical clay material to a refining machine for multiple refining to obtain a cylindrical clay material;

[0056] S8, conveying the cylindrical clay material to an extrusion molding machine for extrusion molding to obtain a honeycomb wet blank;

[0057] S9, conveying the honeycomb wet blank to a shade drying room for shade drying to obtain a honeycomb shaped shaped blank;

[0058] S10, conveying the honeycomb shaped shaped blank to a drying room, slowly heating according to a preset heating gradient using circulating hot air to obtain a honeycomb shaped dry blank with a moisture content of less than 5%;

[0059] S11, placing the honeycomb shaped dry blank in an oxygen-free calcining furnace, slowly heating to a calcining temperature and maintaining the temperature, and waiting for natural cooling to room temperature to obtain a honeycomb shaped activated carbon.

[0060] In some embodiments, in step S1, the first preset ratio is in the range of 1:1.4-1:1.8, the phosphoric acid is obtained by a phosphoric acid solution, and the concentration of phosphoric acid in the phosphoric acid solution is 50%-80%

[0061] In some embodiments, step S2 further comprises:

[0062] maintaining the first mixture at a carbonization temperature in the range of 250-350℃ for 20-60 minutes to obtain a carbonized mixture;

[0063] maintaining the carbonized mixture at an activation temperature in the range of 500-600℃ for 10-20 minutes to obtain a phosphoric acid carbon activation material.

[0064] In some embodiments, step S3 further comprises:

[0065] washing the phosphoric acid carbon activation material to a pH of the carbon ≥2.5, and drying the phosphoric acid carbon activation material to a moisture content ≤10%.

[0066] In some embodiments, step S4 further comprises:

[0067] introducing nitrogen into the external heating converter, maintaining the temperature of the external heating converter at 500-650℃ for 0.5-1.5h, setting the particle size of the ground powder to 200 mesh, and the passing rate ≤5%.

[0068] In some embodiments, step S5 further comprises:

[0069] The phosphoric carbon, the attapulgite and the carboxymethyl cellulose are mixed according to the ratio of 100 parts of phosphoric carbon, 40-60 parts of attapulgite, 0.5-1.5 parts of carboxymethyl cellulose, and 110-120 parts of silica sol solution with a concentration of 1-2%.

[0070] Step S6 further includes:

[0071] In the second mixture, 1 part of machine oil is added, and the machine oil is gear oil.

[0072] In some embodiments, step S7 further includes:

[0073] The cylindrical mud is transported to a filter with a mesh of 40-60 meshes for filtering, and is subjected to multiple times of refining mud in a refining mud machine with a vacuum degree of 0.08-0.1 MPa, and the number of times of refining mud is 1-3 times.

[0074] In some embodiments, step S9 further includes:

[0075] The honeycomb-shaped wet blank is transported to a shade drying room with a temperature of 20-25°C and a relative humidity of 50-70% for shade drying for 2-3 days.

[0076] In some embodiments, step S10 further includes:

[0077] The circulating hot air of the drying room is provided by two heat pumps;

[0078] The drying conditions of the drying room are set to a temperature of 30-40°C and a relative humidity of 85-95%, and the honeycomb-shaped shaped blank is placed in the drying room for primary drying for 24 hours to obtain a primary dried blank;

[0079] The drying conditions of the drying room are set to a temperature of 40-50°C and a relative humidity of 70-85%, and the primary dried blank is placed in the drying room for secondary drying for 24 hours to obtain a secondary dried blank;

[0080] The drying conditions of the drying room are set to a temperature of 50-60°C and a relative humidity of 50-70%, and the secondary dried blank is placed in the drying room for tertiary drying for 24 hours to obtain a tertiary dried blank, and the tertiary dried blank is recorded as a honeycomb-shaped dried blank.

[0081] In some embodiments, step S11 further includes:

[0082] The oxygen-free calcination furnace is controlled to slowly increase the temperature to a calcination temperature of 500-550°C within 7-9 hours, and the temperature is maintained for 1-3 hours.

[0083] Example 1:

[0084] Preparation of phosphoric carbon:

[0085] (1) Screen the wood and bamboo chips, take the 3-12 mesh components, and mix with phosphoric acid with a concentration of 50-80%, according to the ratio of wood and bamboo chips to pure phosphoric acid of 1:1.4-1:1.8, to obtain a first mixture;

[0086] (2) Heat the first mixture to a carbonization temperature of 250-350℃, and keep it for 20-60 min, then heat it to an activation temperature of 500-600℃, and keep it for 10-20 min, to obtain a phosphoric acid carbon activation material.

[0087] (3) After the phosphoric acid carbon activation material is washed by gradient recovery of phosphoric acid until the pH of the carbon is greater than or equal to 2.5, dry it to a moisture content of less than or equal to 10%, to obtain a phosphoric acid carbon semi-finished product;

[0088] (4) Heat the phosphoric acid carbon semi-finished product to a heat treatment temperature of 500-650℃ in an external heating converter under a nitrogen atmosphere, and keep it for 0.5-1.5 h. The particle size of the ground powder is controlled to have a 200 mesh passing rate of less than or equal to 5%. A phosphoric acid carbon is obtained.

[0089] Preparation of honeycomb carbon:

[0090] (5) Mixing and kneading: mix 100 parts of the phosphoric acid carbon, 40-60 parts of attapulgite, and 0.5-1.5 parts of carboxymethyl cellulose, then add 110-120 parts of a silica sol solution with a concentration of 1-2%, knead for 20 min, then add 1 part of gear oil, and knead for 10 min, to obtain a honeycomb carbon kneading material.

[0091] (6) Refining and molding: the honeycomb carbon kneading material is coarsely refined by a coarse mud refiner to obtain cylindrical mud, then the impurities are filtered out by a filter with a 40-60 mesh screen, the filtered mud is refined by a fine mud refiner with a vacuum degree of 0.08-0.1 MPa for 1-3 times, to obtain smooth and compact cylindrical mud, and finally the cylindrical mud is transported to an extrusion molding machine with a honeycomb mold for extrusion molding, to obtain a honeycomb-shaped wet blank.

[0092] (7) Shade drying: the honeycomb-shaped wet blank is placed in a shade drying room with a temperature of 20-25℃ and a relative humidity of 50-70% for 2-3 days, to slowly lose water and be shaped, to obtain a honeycomb-shaped shaped blank.

[0093] (8) Heat pump rapid drying: the honeycomb-shaped shaped blank is transported to a drying room with two heat pumps, and is dried under the following conditions: 30-40℃, relative humidity 85-95%, for 1 day; 40-50℃, relative humidity 70-85%, for 1 day; 50-60℃, relative humidity 50-70%, for 1 day. After drying, the moisture content is less than 5%, and a honeycomb-shaped dry blank is obtained.

[0094] (9) Medium temperature calcination: the honeycomb dry material is placed in a sealed oxygen-deficient calcination furnace, slowly heated to a calcination temperature of 500-550°C for 7-9 hours, and calcination is completed after 1-3 hours of heat preservation. The calcination furnace is naturally cooled to room temperature to obtain the honeycomb activated carbon.

[0095] Example 2:

[0096] Preparation of phosphoric acid carbon:

[0097] (1) The wood and bamboo chips are screened, and the 3-12 mesh components are mixed with phosphoric acid with a concentration of 70% at a ratio of wood and bamboo chips to pure phosphoric acid of 1:1.6 to obtain a first mixture.

[0098] (2) The first mixture is heated to a carbonization temperature of 300°C, and then heated to an activation temperature of 550°C for 40 minutes and 15 minutes of heat preservation, respectively, to obtain phosphoric acid carbon activation material.

[0099] (3) After the phosphoric acid carbon activation material is washed by gradient recovery of phosphoric acid to a pH of the carbon of ≥2.5, it is dried to a moisture content of ≤10% to produce a phosphoric acid carbon semi-finished product.

[0100] (4) The phosphoric acid carbon semi-finished product is heated to a heat treatment temperature of 600°C in an external heating converter under a nitrogen atmosphere, and heat preservation is performed for 1 hour. The particle size of the ground powder is controlled to have a 200 mesh passing rate of ≤5%. The phosphoric acid carbon is obtained.

[0101] Preparation of honeycomb carbon:

[0102] (5) Mixing and kneading: 100 parts of phosphoric acid carbon, 50 parts of attapulgite, and 1 part of carboxymethyl cellulose are mixed, 115 parts of a silica sol solution with a concentration of 1.5% is added, kneaded for 20 minutes, and then 1 part of gear oil is added, kneaded for 10 minutes, to obtain a honeycomb carbon kneading material.

[0103] (6) Refining and molding: the honeycomb carbon kneading material is refined by a coarse refining machine to obtain a cylindrical mud material, and then impurities are filtered out by a filter with a 50 mesh screen. The filtered mud material is refined twice by a fine refining machine with a vacuum degree of 0.08-0.1 MPa to obtain smooth and compact cylindrical mud material. Finally, the cylindrical mud material is transported to an extrusion molding machine with a honeycomb mold for extrusion molding to obtain a honeycomb wet blank.

[0104] (7) Shade drying: the honeycomb wet material is placed in a shade drying room with a temperature of 20-25°C and a relative humidity of 50-70% for 2.5 days to slowly lose water and set, obtaining a honeycomb set blank.

[0105] (8) Heat pump rapid drying: honeycomb-shaped molding material is transported to a drying room with two heat pumps, and is dried at 30-40°C, 85-95% relative humidity for 1 day under the heating of circulating hot air; the temperature is raised to 40-50°C, 70-85% relative humidity for 1 day; the temperature is raised to 50-60°C, 50-70% relative humidity for 1 day, and the moisture content of the honeycomb-shaped dry material is less than 5% after drying.

[0106] (9) Medium-temperature calcination: the honeycomb-shaped dry material is placed in a sealed oxygen-deficient calcination furnace, and slowly heated to a calcination temperature of 525°C for 8 hours, and the calcination is completed after 2 hours of heat preservation. The calcination furnace is naturally cooled to room temperature to obtain honeycomb-shaped activated carbon.

[0107] The above technical solutions have the following advantages:

[0108] (1) Phosphoric acid carbon is used as the base carbon. Due to the particularity of the activation mechanism of phosphoric acid carbon, the mesopores and micropores of the phosphoric acid carbon are more developed than those of physical carbon. The iodine adsorption value of the honeycomb carbon prepared by the method (detection standard: GB / T 12496.8-2015 "Wooden activated carbon test method for determination of iodine adsorption value") can be greater than 800 mg / g, and the carbon tetrachloride adsorption rate (detection standard: GB / T 12496.5-1999 "Wooden activated carbon test method for determination of carbon tetrachloride adsorption rate (activity)") can be greater than 70%.

[0109] (2) The phosphoric acid carbon semi-finished product is activated at a higher temperature than conventional phosphoric acid carbon, and then subjected to high-temperature heat treatment to improve the thermal stability of the phosphoric acid carbon. At the same time, the high-temperature heat treatment of the phosphoric acid carbon semi-finished product can also reduce the surface acidic groups of the phosphoric acid carbon, so that the phosphoric acid carbon is not easy to shrink and crack during the preparation of the honeycomb carbon.

[0110] (3) A proper amount of carboxymethyl cellulose and silica sol is added during the preparation of the honeycomb carbon to reduce the cracking rate of the honeycomb carbon during drying and calcination.

[0111] (4) The drying process of the honeycomb carbon uses circulating hot air generated by two heat pumps to heat the drying room, so that the honeycomb carbon is evenly heated, the cracking rate during the drying process is reduced, and the drying time is shortened.

[0112] (5) The honeycomb carbon is calcined at a medium temperature of 500-550°C, which is more suitable for the preparation of the honeycomb carbon from phosphoric acid carbon, and reduces the shrinkage rate and cracking rate of the honeycomb carbon during calcination.

[0113] The above only describes some embodiments of the present application, and does not limit the protection scope of the present application. Any equivalent device or equivalent process conversion made by the present application, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A method for preparing highly adsorbable and water-resistant honeycomb activated carbon, characterized in that: include: S1. Screening wood and bamboo chips, taking 3-12 mesh fractions, and mixing them with phosphoric acid in a first preset ratio to obtain a first mixture; S2, carbonizing and reactivating the first mixed material to obtain a phosphate carbon activated material, comprising: Keeping the first mixture at a carbonization temperature range of 250-350° C. for 20-60 minutes to obtain a carbonized mixture; The carbonized mixture is kept at an activation temperature range of 500-600° C. for 10-30 minutes to obtain an activated phosphate carbon material; S3, performing gradient recovery washing of phosphoric acid on the activated carbon phosphate material and drying the same to obtain a carbon phosphate semi-finished product; S4, placing the semi-finished carbon phosphate product in an externally heated converter into which an inert gas is introduced, and grinding the semi-finished carbon phosphate product after high-temperature heat treatment to obtain the carbon phosphate product, comprising: Nitrogen is introduced into the externally heated converter, and the temperature of the externally heated converter is maintained at 500-650° C. for 0.5-1.5 hours. The particle size of the ground powder is set to 200 mesh, and the pass rate is ≤5%; S5, mixing carbon phosphate, attapulgite, and carboxymethyl cellulose according to a second preset ratio, adding a silica sol solution of a preset concentration and kneading for 20 to 30 minutes to obtain a second mixture; S6. Adding engine oil to the second mixture and kneading for 10 to 30 minutes to obtain a honeycomb carbon kneaded material; S7, placing the honeycomb carbon kneaded material in a coarse smelting machine for coarse smelting to obtain cylindrical slurry, then conveying the cylindrical slurry to a filter for filtration, and conveying the filtered cylindrical slurry to a fine smelting machine for multiple fine smelting to obtain cylindrical slurry; S8, transporting the cylindrical clay material to an extrusion molding machine for extrusion molding to obtain a honeycomb wet blank; S9, transporting the honeycomb wet blank to a shade drying room for shade drying to obtain a honeycomb shaped blank; S10, transporting the honeycomb shaped blank to a drying room, and slowly heating it according to a preset temperature gradient using circulating hot air to obtain a honeycomb dry blank with a moisture content of less than 5%; S11, placing the honeycomb dry blank in an oxygen-free calcining furnace, slowly heating it to a calcining temperature and keeping it warm, and waiting for it to naturally cool to room temperature to obtain honeycomb activated carbon.

2. The method for preparing highly adsorbable water-resistant honeycomb activated carbon according to claim 1, characterized in that: In step S1, the first preset ratio ranges from 1:1.4 to 1:1.8, the phosphoric acid is obtained from a phosphoric acid solution, and the phosphoric acid concentration in the phosphoric acid solution is 50% to 80%.

3. The method for preparing highly adsorbable water-resistant honeycomb activated carbon according to claim 1, characterized in that: Step S3 further includes: The activated phosphate carbon material is washed until the pH of the carbon is ≥2.5, and the activated phosphate carbon material is dried until the moisture content is ≤10%.

4. The method for preparing highly adsorbable water-resistant honeycomb activated carbon according to claim 1, wherein: Step S5 further includes: Mixing carbon phosphate, attapulgite, and carboxymethyl cellulose in a ratio of 100 parts carbon phosphate, 40-60 parts attapulgite, and 0.5-1.5 parts carboxymethyl cellulose, and adding 110-120 parts of a silica sol solution of a preset concentration, wherein the preset concentration ranges from 1 to 2%; Step S6 further includes: Add 1 part of engine oil to the second mixture, the engine oil is gear oil.

5. The method for preparing highly adsorbable water-resistant honeycomb activated carbon according to claim 1, wherein: The step S7 further includes: The cylindrical mud material is transported to a filter with a screen of 40-60 meshes for filtration, and is refined multiple times in a mud refiner with a vacuum degree of 0.08-0.1 MPa, the number of times of refining the mud is 1-3 times.

6. The method for preparing highly adsorbable water-resistant honeycomb activated carbon according to claim 1, characterized in that: The step S9 further includes: The wet honeycomb blank is transported to a shade drying room with a temperature of 20-25° C. and a relative humidity of 50-70% for shade drying for 2-3 days.

7. The method for preparing highly adsorbable and water-resistant honeycomb activated carbon according to claim 1, wherein: The step S10 further includes: The circulating hot air in the drying room is provided by two heat pumps; The drying conditions of the drying room are set to a temperature of 30-40° C. and a relative humidity of 85-95%, and the honeycomb shaped blank is placed in the drying room for primary drying for 24 hours to obtain a primary dried blank; The drying conditions of the drying room are set to a temperature of 40-50° C. and a relative humidity of 70-85%, and the primary dried blank is placed in the drying room for secondary drying for 24 hours to obtain a secondary dried blank; The drying conditions of the drying room are set to a temperature of 50-60° C. and a relative humidity of 50-70%, and the secondary dried blank is placed in the drying room for tertiary drying for 24 hours to obtain a tertiary dried blank, which is recorded as the honeycomb dry blank.

8. The method for preparing highly adsorbable water-resistant honeycomb activated carbon according to claim 1, characterized in that: The step S11 further includes: The oxygen-free calcining furnace is controlled to slowly heat up to a calcining temperature of 500-550° C. within 7-9 hours, and kept warm for 1-3 hours.