CN115072719A - Method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes - Google Patents
Method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes Download PDFInfo
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- CN115072719A CN115072719A CN202210600032.XA CN202210600032A CN115072719A CN 115072719 A CN115072719 A CN 115072719A CN 202210600032 A CN202210600032 A CN 202210600032A CN 115072719 A CN115072719 A CN 115072719A
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- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/336—Preparation characterised by gaseous activating agents
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Abstract
The invention discloses a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes, which comprises the following steps: impurity removal treatment of bamboo processing waste: collecting wastes of bamboo joints and bamboo dust after industrial processing of bamboo poles, and then removing stones, sand and iron to obtain clean bamboo leftovers; drying the clean bamboo leftovers; grinding the dried bamboo into bamboo powder; directly adding the bamboo powder into a forming machine, and carrying out cold press forming to obtain columnar large particles of 7-12 mm; adding the formed columnar large particles into a rotary carbonization furnace for carbonization, and then putting the carbonized columnar large particles into a rotary activation furnace or a vertical SLEP activation furnace for activation and reaming treatment to produce a product with developed pores and large specific surface area; the invention reduces the production cost.
Description
Technical Field
The invention relates to a method for producing columnar activated carbon by using bamboo wastes, in particular to a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes, belonging to the field of preparation of adsorption materials of activated carbon.
Background
The active carbon is an adsorption material with wide application, the active carbon is produced by adopting the waste after bamboo poles are processed into bamboo furniture and bamboo artware, the raw material source is fully and durably ensured, the cost is low, and the prepared active carbon finished product has excellent quality, so that the active carbon has multiple purposes. The large-particle columnar activated carbon of bamboo is more beneficial to the unique pore structure of the activated carbon, namely, a developed and layered crystal with a medium pore. The adsorption speed is fast, and the desorption speed is also fast.
The bamboo cold-press molded columnar large-particle carbon has developed mesopores, is used for decoloring and refining foods and medicines, and can be used for purifying water and extracting sewage, but the existing preparation method generally needs an adhesive for adhesion, so that the problems of high processing cost and low processing efficiency exist, and improvement is needed.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes, which is used for solving the defects of high processing cost and low processing efficiency of the conventional activated carbon.
Disclosure of the invention
In order to solve the technical problems, the invention provides the following technical scheme: a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes comprises the following steps:
1) impurity removal treatment of bamboo processing waste: collecting wastes of bamboo joints and bamboo dust after industrial processing of bamboo poles, and then removing stones, sand and iron to obtain clean bamboo leftovers;
2) drying the clean bamboo leftovers;
3) grinding the dried bamboo into bamboo powder;
4) directly adding the bamboo powder into a forming machine, and carrying out cold press forming to obtain columnar large particles of 7-12 mm;
5) adding cold high-pressure formed columnar large particles of 7-12 mm into a rotary carbonization furnace for carbonization treatment, wherein the pressure of the cold high pressure is 12-18 Mpa;
6) putting the bamboo strip-shaped carbonized product obtained in the step 5) into a rotary activation furnace or a vertical SLEP activation furnace for activation and reaming treatment to produce a product with developed pores and large specific surface area; the pore volume of the pores of the product needs to be more than 0.65cm3/g, and the specific surface area of the product needs to be more than 850m 2/g;
wherein: and (4) adopting a cold press molding mode in the molding process of the step 4), and adding no binder in the midway.
Preferably, the carbonization temperature in the step 5) is 430-520 ℃, and the carbonization time is as follows: 45-65 min.
Preferably, in the step 6), the activation temperature is 850-960 ℃ and water vapor and carbon dioxide are introduced for alternation.
Preferably, the moisture content of the dried bamboo in the step 3) is required to be 10-12%.
(III) advantageous effects
The invention provides a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes, which has the advantages that: the invention has the advantages that the clean bamboo leftovers are directly subjected to cold press molding without adding any binder, the production process is further environment-friendly, the cost is further reduced, the control on product particles can be realized through a die and a hole, and meanwhile, the rotary carbonization furnace and the vertical carbonization furnace can be used, so that a choice is provided for industrialization, and the rotary high-temperature activation avoids air passage blockage caused by the reduction of the product strength.
Drawings
FIG. 1 is a flow chart of a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes.
Detailed Description
Example one
As shown in fig. 1, the present invention provides an embodiment: a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes comprises the following steps:
1) impurity removal treatment of bamboo processing waste: collecting wastes of bamboo joints and bamboo dust after industrial processing of bamboo poles, and then removing stones, sand and iron to obtain clean bamboo leftovers;
2) drying the clean bamboo leftovers;
3) grinding the dried bamboo into bamboo powder;
4) directly adding the bamboo powder into a forming machine, and carrying out cold press forming to obtain columnar large particles of 7-12 mm; the size of the columnar large particles is 7 mm.
5) Adding the cold high-pressure formed columnar large particles with the diameter of 7-12 mm into a rotary carbonization furnace for carbonization treatment; the pressure intensity of the cold high pressure is 12-18 Mpa;
6) putting the bamboo strip-shaped carbonized product obtained in the step 5) into a rotary activation furnace or a vertical SLEP activation furnace for activation and reaming treatment to produce a product with developed pores and large specific surface area; the pore volume of the pores of the product needs to be more than 0.65cm3/g, and the specific surface area of the product needs to be more than 850m 2/g;
wherein: and (5) adopting a cold press molding mode in the molding process of the step 4), and not adding any binder in the midway.
Preferably, the carbonization temperature in the step 5) is 430-520 ℃, and the carbonization time is as follows: 45-65 min. The charcoal fire temperature is 450 ℃.
Preferably, in the step 6), the activation temperature is 850-960 ℃ and water vapor and carbon dioxide are introduced to carry out alternation. The activation temperature was 850 ℃.
Preferably, the moisture content of the dried bamboo in step 3) is 10-12%, and in this embodiment, the moisture content is 10%.
Example two
The embodiment provided by the invention comprises the following steps: a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes comprises the following steps:
1) impurity removal treatment of bamboo processing waste: collecting wastes of bamboo joints and bamboo dust after industrial processing of bamboo poles, and then removing stones, sand and iron to obtain clean bamboo leftovers;
2) drying the clean bamboo leftovers;
3) grinding the dried bamboo into bamboo powder;
4) directly adding the bamboo powder into a forming machine, and performing cold press forming to obtain columnar large particles with the size of 8 mm;
5) adding the columnar large particles of 8mm formed by cold high pressure (the pressure of the cold high pressure is 13 Mpa) into a rotary carbonization furnace for carbonization treatment;
6) putting the bamboo strip-shaped carbonized product obtained in the step 5) into a rotary activation furnace or a vertical SLEP activation furnace for activation and reaming treatment to produce a product with developed pores and large specific surface area; the pore volume of the pores of the product needs to be more than 0.65cm3/g, and the specific surface area of the product needs to be more than 850m 2/g;
wherein: and (4) adopting a cold press molding mode in the molding process of the step 4), and adding no binder in the midway.
Preferably, the temperature of carbonization in the step 5) is 480 ℃, and the carbonization time is as follows: and (5) 48 min.
Preferably, in step 6) the activation temperature is alternated with steam and carbon dioxide at 920 ℃.
Preferably, the moisture content of the bamboo dried in the step 3) is required to be 10%.
EXAMPLE III
The embodiment provided by the invention comprises the following steps: a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes comprises the following steps:
1) impurity removal treatment of bamboo processing waste: collecting wastes of bamboo joints and bamboo dust after industrial processing of bamboo poles, and then removing stones, sand and iron to obtain clean bamboo leftovers;
2) drying the clean bamboo leftovers;
3) grinding the dried bamboo into bamboo powder;
4) directly adding bamboo powder into a forming machine, and performing cold press forming to obtain columnar large particles of 10 mm;
5) adding the columnar large particles of 10mm formed by cold high pressure (the pressure of the cold high pressure is 14 Mpa) into a rotary carbonization furnace for carbonization treatment;
6) putting the bamboo strip-shaped carbonized product obtained in the step 5) into a rotary activation furnace or a vertical SLEP activation furnace for activation and reaming treatment to produce a product with developed pores and large specific surface area; the pore volume of the pores of the product needs to be more than 0.65cm3/g, and the specific surface area of the product needs to be more than 850m 2/g;
wherein: and (4) adopting a cold press molding mode in the molding process of the step 4), and adding no binder in the midway.
Preferably, the carbonization temperature in the step 5) is 500 ℃, and the carbonization time is as follows: and (5) 55 min.
Preferably, in step 6) the activation temperature is alternated by passing water vapor and carbon dioxide at 940 ℃.
Preferably, the moisture content of the bamboo dried in the step 3) is required to be ensured to be 11.4%.
Example four
The embodiment provided by the invention comprises the following steps: a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes comprises the following steps:
1) impurity removal treatment of bamboo processing waste: collecting wastes of bamboo joints and bamboo dust after industrial processing of bamboo poles, and then removing stones, sand and iron to obtain clean bamboo leftovers;
2) drying the clean bamboo leftovers;
3) grinding the dried bamboo into bamboo powder;
4) directly adding the bamboo powder into a forming machine, and performing cold press forming to obtain columnar large particles with the diameter of 11 mm;
5) adding the columnar large particles of 11mm formed by cold high pressure (the pressure of the cold high pressure is 17 Mpa) into a rotary carbonization furnace for carbonization treatment;
6) putting the bamboo strip-shaped carbonized product obtained in the step 5) into a rotary activation furnace or a vertical SLEP activation furnace for activation and reaming treatment to produce a product with developed pores and large specific surface area; the pore volume of the pores of the product needs to be more than 0.65cm3/g, and the specific surface area of the product needs to be more than 850m 2/g;
wherein: and (4) adopting a cold press molding mode in the molding process of the step 4), and adding no binder in the midway.
Preferably, the temperature of carbonization in the step 5) is 510 ℃, and the carbonization time is as follows: and (5) performing treatment for 60 min.
Preferably, in step 6) the activation temperature is alternated by passing water vapor and carbon dioxide at 950 ℃.
Preferably, the moisture content of the bamboo dried in the step 3) is required to be ensured at 11%.
EXAMPLE five
The embodiment provided by the invention comprises the following steps: a method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes comprises the following steps:
1) impurity removal treatment of bamboo processing waste: collecting wastes of bamboo joints and bamboo dust after industrial processing of bamboo poles, and then removing stones, sand and iron to obtain clean bamboo leftovers;
2) drying the clean bamboo leftovers;
3) grinding the dried bamboo into bamboo powder;
4) directly adding the bamboo powder into a forming machine, and performing cold press forming to obtain 12mm columnar large particles;
5) adding large columnar particles of 12mm formed by cold high pressure (the pressure of the cold high pressure is 18 Mpa) into a rotary carbonization furnace for carbonization treatment;
6) putting the bamboo strip-shaped carbonized product obtained in the step 5) into a rotary activation furnace or a vertical SLEP activation furnace for activation and reaming treatment to produce a product with developed pores and large specific surface area; the pore volume of the pores of the product needs to be more than 0.65cm3/g, and the specific surface area of the product needs to be more than 850m 2/g;
wherein: and (4) adopting a cold press molding mode in the molding process of the step 4), and adding no binder in the midway.
Preferably, the temperature of the carbonization in the step 5) is 520 ℃, and the carbonization time is as follows: and 65 min.
Preferably, in step 6) the activation temperature is alternated with the introduction of water vapour and carbon dioxide at 960 ℃.
Preferably, the moisture content of the bamboo dried in the step 3) is required to be ensured to be 12%.
Compared with the existing activated carbon preparation method, the method does not need an adhesive for bonding, and is operated in a cold press molding mode, so that the preparation method for preparing the activated carbon with low cost and developed mesopores is finally provided. In addition, the whole manufacturing and processing process is simple and reliable, the energy in the carbonization process is fully utilized and is environment-friendly, the production equipment is all made in China, the manufacturing process is advanced, the automatic control is easy to realize, by adjusting the process conditions and factors, can obtain series products with different pore structures and grades, well realizes the continuous recovery and the full utilization of resources, therefore, the invention has the advantages that the clean bamboo leftovers are directly subjected to cold press molding without adding any binder, the production process is further environment-friendly, the cost is further reduced, and the control to the product particles can be realized by the die and the touch hole at the later stage, and simultaneously, the rotary carbonization furnace and the vertical carbonization furnace can be used, which provides a choice for industrialization, and rotary high-temperature activation avoids air passage blockage caused by product strength reduction, and meanwhile, the activation temperature and the addition amount of an activating agent are key technical points for adjusting the product quality.
Corresponding experimental data for the finished product are provided below:
| sample (I) | Iodine adsorption number | Methylene blue | CTC | Strength of | Ash content |
| Example 1 preparation of the finished product | 11342mg/g | 273mg/g | 66% | 97% | 9.3% |
| Example 2 preparation of the finished product | 1081mg/g | 258mg/g | 61% | 98% | 9.0% |
Therefore, experiments prove that the activated carbon prepared by the method has strong strength and relatively low ash content, and the iodine adsorption value of the activated carbon meets the iodine adsorption requirement of the activated carbon.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for producing columnar large-particle activated carbon by cold press molding of bamboo wastes is characterized by comprising the following steps:
1) impurity removal treatment of bamboo processing waste: collecting wastes of bamboo joints and bamboo dust after industrial processing of bamboo poles, and then removing stones, sand and iron to obtain clean bamboo leftovers;
2) drying the clean bamboo leftovers;
3) grinding the dried bamboo into bamboo powder;
4) directly adding the bamboo powder into a forming machine, and carrying out cold press forming to obtain columnar large particles of 7-12 mm;
5) adding cold high-pressure formed columnar large particles of 7-12 mm into a rotary carbonization furnace for carbonization treatment, wherein the pressure of the cold high pressure is 12-18 Mpa;
6) putting the bamboo strip-shaped carbonized product obtained in the step 5) into a rotary activation furnace or a vertical SLEP activation furnace for activation and reaming treatment to produce a product with developed pores and large specific surface area; the pore volume of the pores of the product needs to be more than 0.65cm3/g, and the specific surface area of the product needs to be more than 850m 2/g;
wherein: and (4) adopting a cold press molding mode in the molding process of the step 4), and adding no binder in the midway.
2. The method for producing the columnar large-particle activated carbon by cold press molding of the bamboo wastes as claimed in claim 1, wherein the method comprises the following steps: the carbonization temperature in the step 5) is 430-520 ℃, and the carbonization time is as follows: 45-65 min.
3. The method for producing the columnar large-particle activated carbon by cold press molding of the bamboo wastes as claimed in claim 1, wherein the method comprises the following steps: and 6) introducing steam and carbon dioxide at the activation temperature of 850-960 ℃ for alternation.
4. The method for producing the columnar large-particle activated carbon by cold press molding of the bamboo wastes as claimed in claim 1, wherein the method comprises the following steps: the moisture content of the dried bamboo in the step 3) needs to be ensured to be 10-12%.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4149995A (en) * | 1977-12-30 | 1979-04-17 | The Carborundum Company | Granular activated carbon manufacture from brown coal treated with concentrated inorganic acid without pitch |
| CN102502626A (en) * | 2011-09-29 | 2012-06-20 | 朱海生 | Production method of bamboo environment-friendly active carbon |
| CN104211061A (en) * | 2014-08-26 | 2014-12-17 | 宁夏华辉活性炭股份有限公司 | Preparation method of columnar bamboo activated carbon |
| CN107226470A (en) * | 2017-05-26 | 2017-10-03 | 天津大学 | Adjustable macropore biological activated carbon of adhesive-free hole and its preparation method and application |
| CN108557820A (en) * | 2018-06-05 | 2018-09-21 | 浙江佶竹生物科技有限公司 | A kind of preparation method of COD high removal rates activated carbon from bamboo |
| CN109437195A (en) * | 2018-11-27 | 2019-03-08 | 浙江佶竹生物科技有限公司 | A kind of preparation method of bamboo matter pressure-variable adsorption active carbon |
-
2022
- 2022-05-30 CN CN202210600032.XA patent/CN115072719A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4149995A (en) * | 1977-12-30 | 1979-04-17 | The Carborundum Company | Granular activated carbon manufacture from brown coal treated with concentrated inorganic acid without pitch |
| CN102502626A (en) * | 2011-09-29 | 2012-06-20 | 朱海生 | Production method of bamboo environment-friendly active carbon |
| CN104211061A (en) * | 2014-08-26 | 2014-12-17 | 宁夏华辉活性炭股份有限公司 | Preparation method of columnar bamboo activated carbon |
| CN107226470A (en) * | 2017-05-26 | 2017-10-03 | 天津大学 | Adjustable macropore biological activated carbon of adhesive-free hole and its preparation method and application |
| CN108557820A (en) * | 2018-06-05 | 2018-09-21 | 浙江佶竹生物科技有限公司 | A kind of preparation method of COD high removal rates activated carbon from bamboo |
| CN109437195A (en) * | 2018-11-27 | 2019-03-08 | 浙江佶竹生物科技有限公司 | A kind of preparation method of bamboo matter pressure-variable adsorption active carbon |
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