CN113277507B - Preparation process of catalyst carrier activated carbon for fully utilizing bamboo crushed aggregates - Google Patents
Preparation process of catalyst carrier activated carbon for fully utilizing bamboo crushed aggregates Download PDFInfo
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- CN113277507B CN113277507B CN202110499246.8A CN202110499246A CN113277507B CN 113277507 B CN113277507 B CN 113277507B CN 202110499246 A CN202110499246 A CN 202110499246A CN 113277507 B CN113277507 B CN 113277507B
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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
- C01B32/342—Preparation characterised by non-gaseous activating agents
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- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
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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
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
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Abstract
The invention discloses a preparation process of catalyst carrier activated carbon for fully utilizing bamboo particles, which comprises the following steps: s1, pre-sorting, namely dividing the bamboo crushed aggregates into two batches through a 50-mesh screen, and respectively putting the two batches into a crushed aggregate box and a lump material box; s2, soaking and kneading; s3, performing carbon activation treatment, namely respectively feeding the materials obtained by processing the two kneading machines into a rotary kiln, wherein the rotating speed of the rotary kiln for activating the bamboo crushed aggregates with the particle size of less than 50 meshes is 2-4 r/min, so that the loss on ignition is less than 50%, thus obtaining microporous activated carbon, the rotating speed of the rotary kiln for activating the bamboo crushed aggregates with the particle size of more than 50 meshes is 5-10 r/min, and the loss on ignition is more than 75%, thus obtaining macroporous activated carbon; s4, acid washing is carried out, heavy metals in the activated carbon are removed, and meanwhile the pH value of the activated carbon is adjusted; s5, drying; s6, screening the granular materials; s7, powder grinding; and S8, packaging powder. The bamboo crushed aggregates are divided into two types according to the size and are respectively processed, so that the simultaneous processing of the large-aperture activated carbon and the micro-aperture activated carbon is realized, the high yield of each activated carbon is ensured, and the full utilization of the bamboo crushed aggregates is realized.
Description
Technical Field
The invention relates to a preparation process of activated carbon, in particular to a preparation process of catalyst carrier activated carbon which fully utilizes bamboo crushed aggregates.
Background
The activated carbon is a product highly dependent on resources and energy sources, and not only can be used as a purification material, but also can be used as an activated carbon carrier. Due to the restriction of the shortage of raw material resources, the increase of the yield of the activated carbon is greatly limited, and the increasingly vigorous demands of the market cannot be met; but a large amount of bamboo crushed aggregates can be generated in the bamboo processing process, scientific, reasonable and effective development and comprehensive utilization are not achieved, and the improvement of the added value of the bamboo industry is influenced. If the biological characteristics of bamboo are utilized, the bamboo is prepared into the activated carbon which is used as an adsorption material, thereby saving resources and being beneficial to environmental protection. The production process and technology of the bamboo crushed material activated carbon are developed, the activated carbon is popularized and expanded in activated carbon manufacturers as soon as possible, the problem of insufficient yield of the activated carbon can be effectively solved, the aim of energy conservation and emission reduction is fulfilled in the activated carbon industry, the important strategic measures of the development routes of circular economy and low-carbon economy are taken, and the social benefit and the economic benefit are very remarkable.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a preparation process of catalyst carrier activated carbon for fully utilizing bamboo crushed aggregates, and the preparation process has the effect of recycling the bamboo crushed aggregates.
In order to achieve the technical purpose, the invention provides the following technical scheme: a preparation process of catalyst carrier activated carbon for fully utilizing bamboo crushed aggregates comprises the following steps:
s1, pre-sorting, namely dividing the bamboo crushed aggregates into two batches through a 50-mesh screen, and respectively putting the two batches into a crushed aggregate box and a lump material box;
s2, soaking and kneading, namely putting the bamboo crushed aggregates in the crushed aggregate box into a kneading machine for kneading, spraying a phosphoric acid activating agent with the Baume degree of 35-45 into the kneading machine corresponding to the crushed aggregate box, kneading for 15-20min,
putting the bamboo crushed aggregates in the block box into another kneader for kneading, and spraying a phosphoric acid activating agent with Baume degree of 50-60 into the kneader corresponding to the block box, wherein the kneading time is 30-40min;
s3, performing carbon activation treatment, namely respectively feeding the materials obtained by processing the two kneading machines into a rotary kiln, wherein the rotating speed of the rotary kiln for activating the bamboo crushed aggregates with the particle size of less than 50 meshes is 2-4 r/min, the temperature of discharged carbon is 350-450 ℃, so that the loss on ignition is less than 50 percent, thus obtaining the microporous activated carbon,
the rotating speed of a rotary kiln for activating the bamboo crushed aggregates with the particle size of more than 50 meshes is 5-10 r/min, the temperature of discharged carbon is 350-600 ℃, the loss on ignition is more than 75 percent, and macroporous activated carbon is obtained;
s4, acid washing is carried out, heavy metals in the activated carbon are removed, and meanwhile the pH value of the activated carbon is adjusted;
s5, drying, namely putting the activated carbon after acid washing into an internal heating type converter to enable the activated carbon to be in reverse contact with hot air, so that the moisture content is less than 10%;
s6, screening the granular materials, removing the dried activated carbon with the granularity of more than 40 meshes in a linear vibrating screen, and packaging to obtain a finished product of activated carbon granules by a phosphoric acid method;
s7, grinding powder, namely grinding the active carbon with the granularity of less than 40 meshes into powder in a swing type grinding machine, wherein the granularity is more than 90 percent of that of 200 meshes;
s8, powder packaging, namely putting the powder carbon into a mixing machine for homogenization, and packaging and warehousing the homogenized material.
By adopting the technical scheme, the crushed bamboo materials are firstly screened into two batches, and the large crushed bamboo materials are kneaded to be fine and smooth in texture, so that the large-aperture activated carbon can be prepared, and the crushing of the activated carbon during forming is reduced; the small pieces of finely-crushed bamboo crushed aggregates are loose in texture after being kneaded, and are easy to crush when active carbon with large pore diameter is manufactured, so that the small pieces of finely-crushed bamboo crushed aggregates are suitable for being manufactured into microporous active carbon, the yield of the active carbon manufactured from the bamboo crushed aggregates is high, the bamboo crushed aggregates are fully utilized, and the whole cyclic utilization of the bamboo crushed aggregates is realized.
Preferably, the acid washing in step S4 is performed by gradient acid washing, and the operation method is as follows: 4.1 The second washing liquid obtained by washing the previous batch is used as the first washing water of the batch to improve the concentration of the phosphoric acid solution to obtain the first washing liquid of the batch, and the washing liquid is sent to an evaporation recovery section to be used for recovering high-concentration phosphoric acid; 4.2 A second washing, using a third washing liquid obtained by washing the previous batch as second washing water of the batch to obtain second washing water of the batch, and using the second washing water as first washing water of the next batch; 4.3 The clean water in the upper water header pipe is used as the third washing water of the batch to obtain the third washing liquid of the batch, and the clean water is used as the second washing water of the next batch, and the three steps are circularly carried out.
By adopting the technical scheme, the active carbon is ensured to be repeatedly passed through water by virtue of the gradient acid washing active carbon, and meanwhile, the acid liquor is recycled, so that the utilization rate of water resources is improved, and the production energy conservation is further improved.
Preferably, in the step S1, the screened bamboo scraps are dried in the sun, and then are loaded into a scrap box and a lump box.
By adopting the technical scheme, the raw materials are soaked and kneaded after being dried in the sun, so that the kneading effect is prevented from being influenced by separating the phosphoric acid activating agent from the bamboo crushed aggregates by water.
Preferably, in step S7, the carbon powder of 200 meshes and the next batch of activated carbon to be processed are not mixed into the pendulum mill for further milling.
Through adopting above-mentioned technical scheme, put into next batch crocus once more with unqualified active carbon, reduce the production of waste material, further improved the utilization ratio of bamboo crushed aggregates.
Preferably, in the step S1, the bamboo chips larger than 50 mesh are sieved with a 20-mesh net, and the bamboo chips larger than 20 mesh are crushed by a device and sieved with 50 mesh.
By adopting the technical scheme, the bamboo crushed aggregates are ensured to be broken enough, and the problem that the subsequent generation of the activated carbon is influenced due to poor kneading effect of large bamboo crushed aggregates is avoided.
Preferably, in step S2, the shells and withered and yellow leaves are also put into a kneader and kneaded with the bamboo particles to form the mixture.
Through adopting above-mentioned technical scheme, kneading after shell, leaf and the crushed bamboo material mix, the skeleton of shell and crushed bamboo material can be regarded as to flexible leaf, and the whole toughness of the crushed bamboo material after the reinforcing is kneaded avoids the crushed bamboo material directly to become the powder form, makes things convenient for follow-up processing.
In summary, the present invention achieves the following effects:
1. the bamboo crushed aggregates are divided into two types according to the size and are respectively processed, so that the simultaneous processing of large-aperture activated carbon and micro-aperture activated carbon is realized, the high yield of each activated carbon is ensured, and the full utilization of the bamboo crushed aggregates is realized;
2. the activated carbon is pickled by the aid of the gradient acid, so that the activated carbon is enabled to be repeatedly washed, and the acid liquor is recycled, so that the utilization rate of water resources is improved, and the production energy-saving property is further improved;
3. the large bamboo crushed aggregates are smashed and then soaked and kneaded, so that the whole kneading degree is improved, and the generation of the large bamboo crushed aggregates is avoided.
Detailed Description
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example (b): a preparation process of catalyst carrier activated carbon for fully utilizing bamboo crushed aggregates comprises the following steps:
s1, pre-sorting, namely dividing the bamboo crushed aggregates into two batches through a 50-mesh screen, and respectively putting the two batches into a crushed aggregate box and a lump material box;
s2, soaking and kneading, namely putting the bamboo crushed aggregates in the crushed aggregate box into a kneading machine for kneading, spraying a phosphoric acid activating agent with the Baume degree of 35-45 into the kneading machine corresponding to the crushed aggregate box, kneading for 15-20min,
putting the bamboo crushed aggregates in the block material box into another kneading machine for kneading, and spraying a phosphoric acid activating agent with the Baume degree of 50-60 into the kneading machine corresponding to the block material box, wherein the kneading time is 30-40min;
s3, carbon activation treatment, namely respectively feeding the materials obtained by processing the two kneading machines into a rotary kiln, wherein the rotating speed of the rotary kiln for activating the bamboo crushed aggregates with the particle size of less than 50 meshes is 2-4 r/min, the temperature of discharged carbon is 350-450 ℃, the ignition loss is less than 50 percent, and microporous activated carbon is obtained,
the rotary kiln for activating the bamboo crushed aggregates with the particle size of more than 50 meshes has the rotating speed of 5-10 r/min, the discharged carbon temperature of 350-600 ℃, the loss on ignition of more than 75 percent and the macroporous activated carbon is obtained;
s4, acid washing is carried out, heavy metals in the activated carbon are removed, and meanwhile the pH value of the activated carbon is adjusted;
s5, drying, namely putting the activated carbon after acid washing into an internal heating type converter to enable the activated carbon to be in reverse contact with hot air, so that the moisture content is less than 10%;
s6, screening the granular materials, removing the dried activated carbon with the granularity of more than 40 meshes in a linear vibrating screen, and packaging to obtain a finished product of activated carbon granules by a phosphoric acid method;
s7, grinding powder, namely grinding active carbon with the granularity of less than 40 meshes into powder in a swing type grinder, wherein the granularity is more than 90 percent of that of 200 meshes;
s8, powder packaging, namely placing the powder carbon into a mixing machine for homogenizing, and packaging and warehousing the homogenized material.
The crushed bamboo materials are firstly screened into two batches, and the large crushed bamboo materials are kneaded to be fine and smooth in texture and can be made into large-aperture active carbon, so that the crushing of the active carbon during forming is reduced; the small pieces of finely-crushed bamboo crushed aggregates are loose in texture after being kneaded, and are easy to crush when active carbon with large pore diameter is manufactured, so that the small pieces of finely-crushed bamboo crushed aggregates are suitable for being manufactured into microporous active carbon, the yield of the active carbon manufactured from the bamboo crushed aggregates is high, the bamboo crushed aggregates are fully utilized, and the whole cyclic utilization of the bamboo crushed aggregates is realized.
The acid washing in the step S4 adopts gradient acid washing to carry out acid washing, and the operation method is as follows: 4.1 The second washing liquid obtained by washing the previous batch is used as the first washing water of the batch to improve the concentration of the phosphoric acid solution to obtain the first washing liquid of the batch, and the washing liquid is sent to an evaporation recovery section to be used for recovering high-concentration phosphoric acid; 4.2 A second washing, using a third washing liquid obtained by washing the previous batch as second washing water of the batch to obtain second washing water of the batch, and using the second washing water as first washing water of the next batch; 4.3 The clean water in the upper water header pipe is used as the third washing water of the batch to obtain the third washing liquid of the batch, and the clean water is used as the second washing water of the next batch, and the three steps are circularly carried out.
By means of the gradient acid washing activated carbon, the activated carbon is guaranteed to be repeatedly washed, acid liquor is recycled, the utilization rate of water resources is improved, and the production energy conservation is further improved.
In the step S1, the screened bamboo crushed aggregates are dried in the sun by natural light and then are put into a crushed aggregate box and a block aggregate box. The raw materials are soaked and kneaded after being dried in the sun, so that the kneading effect is prevented from being influenced by the separation of the phosphoric acid activating agent and the bamboo particles by water.
In step S7, the carbon powder which does not pass through 200 meshes and the next batch of activated carbon to be processed are mixed into a pendulum type pulverizer to be continuously pulverized. Put into next batch crocus once more with unqualified active carbon, reduce the production of waste material, further improved the utilization ratio of bamboo crushed aggregates.
In the step S1, the bamboo crushed materials larger than 50 meshes are sieved by a 20-mesh net, the bamboo crushed materials larger than 20 meshes are crushed by equipment, and then the bamboo crushed materials are sieved by a 50-mesh net. The crushed bamboo is guaranteed to be fine and broken, and the problem that subsequent activated carbon generation is influenced due to poor effect of large crushed bamboo during kneading is avoided.
In the step S2, the shells and withered and yellow leaves are also put into a kneading machine and are kneaded with the bamboo particles for forming. Kneading after shell, leaf and the bamboo crushed aggregates mix, the skeleton of shell and bamboo crushed aggregates can be regarded as to flexible leaf, and the whole toughness of kneading back bamboo crushed aggregates is strengthened, avoids the direct garrulous end form of bamboo crushed aggregates, makes things convenient for follow-up processing.
Claims (3)
1. A preparation process of catalyst carrier activated carbon for fully utilizing bamboo crushed aggregates is characterized by comprising the following steps of: the method comprises the following steps:
s1, pre-sorting, namely dividing the bamboo crushed aggregates into two batches through a 50-mesh screen, and respectively putting the two batches into a crushed aggregate box and a lump material box;
in the step S1, the crushed bamboo materials larger than 50 meshes are sieved by a 20-mesh net, the crushed bamboo materials larger than 20 meshes are crushed by equipment, and then sieved by a 50-mesh net;
s2, soaking and kneading, namely putting the bamboo crushed aggregates in the crushed aggregate box into a kneading machine for kneading, spraying a phosphoric acid activating agent with the Baume degree of 35-45 into the kneading machine corresponding to the crushed aggregate box, kneading for 15-20min,
putting the bamboo crushed aggregates in the block material box into another kneading machine for kneading, and spraying a phosphoric acid activating agent with the Baume degree of 50-60 into the kneading machine corresponding to the block material box, wherein the kneading time is 30-40min;
in the step S2, shells and withered and yellow leaves are also put into a kneading machine and are kneaded with the bamboo particles together for forming;
s3, performing carbon activation treatment, namely respectively feeding the materials obtained by processing the two kneading machines into a rotary kiln, wherein the rotating speed of the rotary kiln for activating the bamboo crushed aggregates with the particle size of less than 50 meshes is 2-4 r/min, the temperature of discharged carbon is 350-450 ℃, so that the loss on ignition is less than 50 percent, thus obtaining the microporous activated carbon,
the rotating speed of a rotary kiln for activating the bamboo crushed aggregates with the particle size of more than 50 meshes is 5-10 r/min, the temperature of discharged carbon is 350-600 ℃, the loss on ignition is more than 75 percent, and macroporous activated carbon is obtained;
s4, acid washing is carried out, heavy metals in the activated carbon are removed, and meanwhile the pH value of the activated carbon is adjusted;
the acid washing is carried out by adopting gradient acid washing, and the operation method is as follows: 4.1 The second washing liquid obtained by washing the previous batch is used as the first washing water of the batch to improve the concentration of the phosphoric acid solution to obtain the first washing liquid of the batch, and the washing liquid is sent to an evaporation recovery section to be used for recovering high-concentration phosphoric acid; 4.2 A second washing, using a third washing liquid obtained by washing the previous batch as second washing water of the batch to obtain second washing water of the batch, and using the second washing water as first washing water of the next batch; 4.3 The clean water in the upper water header pipe is used as the third washing water of the batch to obtain the third washing liquid of the batch, and the third washing liquid is used as the second washing water of the next batch, and the three steps are circularly carried out;
s5, drying, namely putting the activated carbon after acid washing into an internal heating type converter to enable the activated carbon to be in reverse contact with hot air, so that the moisture content is less than 10%;
s6, screening the granular materials, removing the dried activated carbon with the granularity of more than 40 meshes in a linear vibrating screen, and packaging to obtain a finished product of activated carbon granules by a phosphoric acid method;
s7, grinding powder, namely grinding the active carbon with the granularity of less than 40 meshes into powder in a swing type grinding machine, wherein the granularity is more than 90 percent of that of 200 meshes;
s8, powder packaging, namely placing the powder carbon into a mixing machine for homogenizing, and packaging and warehousing the homogenized material.
2. The process for preparing the catalyst carrier activated carbon for fully utilizing bamboo particles as claimed in claim 1, wherein the catalyst carrier comprises: in the step S1, the screened bamboo crushed aggregates are dried in the sun by natural light and then are put into a crushed aggregate box and a block aggregate box.
3. The process for preparing the catalyst carrier activated carbon fully utilizing bamboo scraps as claimed in claim 2, wherein the process comprises the following steps: in the step S7, the carbon powder of 200 meshes and the next batch of activated carbon to be processed are not mixed into the pendulum type pulverizer to be continuously pulverized.
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| CN1229831A (en) * | 1998-03-20 | 1999-09-29 | 朱华生 | Making method of artificial synthetic carbon |
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| CN106379897A (en) * | 2016-08-27 | 2017-02-08 | 荥经县极星生物科技有限公司 | Method for preparing bamboo-based activated carbon based on phosphoric acid method and physical and chemical combination method |
| CN108751191A (en) * | 2018-08-09 | 2018-11-06 | 徐州华睿炭材料科技有限公司 | The preparation method of activated carbon is produced with bamboo particle |
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Denomination of invention: Preparation process of catalyst carrier activated carbon for fully utilizing bamboo chips Effective date of registration: 20230419 Granted publication date: 20221125 Pledgee: Bank of Jiangsu Co.,Ltd. Xuzhou Branch Pledgor: XUZHOU HUARUI CARBON MATERIAL TECHNOLOGY Co.,Ltd. Registration number: Y2023980038432 |