CN112678823A - Method for pickling activated carbon by using organic acid - Google Patents
Method for pickling activated carbon by using organic acid Download PDFInfo
- Publication number
- CN112678823A CN112678823A CN202110104421.9A CN202110104421A CN112678823A CN 112678823 A CN112678823 A CN 112678823A CN 202110104421 A CN202110104421 A CN 202110104421A CN 112678823 A CN112678823 A CN 112678823A
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- China
- Prior art keywords
- acid
- activated carbon
- pickling
- water
- acetic acid
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000005554 pickling Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 16
- 150000007524 organic acids Chemical class 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 111
- 239000002253 acid Substances 0.000 claims description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000005406 washing Methods 0.000 claims description 24
- 238000001035 drying Methods 0.000 claims description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 9
- 230000003472 neutralizing effect Effects 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 239000010865 sewage Substances 0.000 claims description 5
- 239000008399 tap water Substances 0.000 claims description 5
- 235000020679 tap water Nutrition 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 15
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 150000007522 mineralic acids Chemical class 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 37
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 206010006784 Burning sensation Diseases 0.000 description 1
- 206010010741 Conjunctivitis Diseases 0.000 description 1
- 231100000570 acute poisoning Toxicity 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 210000002200 mouth mucosa Anatomy 0.000 description 1
- 210000002850 nasal mucosa Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Abstract
The invention belongs to the field of activated carbon production, and particularly relates to a method for pickling activated carbon by organic acid, which is a process for producing pickled activated carbon by using organic acid instead of inorganic acid, can produce the same product performance, and simultaneously ensures the personal safety of operators and effectively discharges waste liquid. At present, the technology is popularized and used in our company, and the effect is obvious. According to the actual use result, the technology can completely replace hydrochloric acid to be used, and the product requirement is met; the personal safety of workers is guaranteed, and the waste liquid discharge can more easily meet the environmental protection requirement.
Description
The technical field is as follows:
the invention belongs to the field of activated carbon production, and particularly relates to a method for pickling activated carbon by using organic acid.
Background art:
in the production process of the activated carbon, ash in the activated carbon needs to be treated according to application requirements, and the existing activated ash reduction production process basically uses hydrochloric acid for acid cleaning. The process uses an aqueous solution of hydrochloric acid which is hydrogen chloride (HCl) gas as a colorless and transparent monobasic strong acid. Hydrochloric acid has strong volatility and corrosivity, causes health hazards to personnel in the using process, and can cause acute poisoning, conjunctivitis, burning sensation of nasal and oral mucosa, trachitis and the like when contacting steam or smoke of the hydrochloric acid. Contact between the eye and the skin can cause burns.
The invention content is as follows:
the invention uses acetic acid or citric acid to replace hydrochloric acid to achieve the same ash reduction effect, and the acetic acid is an organic monobasic acid which is a weak acid and also plays the same ash reduction role in the activated carbon pickling process.
A method for pickling activated carbon by using organic acid comprises the following specific production steps:
the first step is as follows: preparing acid liquor: adding a proper amount of water into a pickling tank, adding an acetic acid solution into the pickling tank, and preparing the acetic acid solution with the concentration less than or equal to 5 percent, wherein water is added firstly, and then acetic acid is added;
the second step is that: acid washing, namely heating the prepared acid solution and keeping the temperature to 60-80 ℃, adding activated carbon to be washed into the acid solution, wherein the surface of the acid solution is 100-300mm higher than the material surface, and fully stirring for 1-6 hours;
the third step: rinsing, namely after pickling is finished, discharging pickling solution, rinsing, adding tap water into a pickling tank until the temperature is 100-300mm above the surface of the material, heating to 70-90 ℃ by using steam, fully stirring, preserving heat for 30 minutes, and then changing water to continue rinsing until the pH value of the cleaning solution reaches about 6;
the fourth step: discharging the waste liquid, and neutralizing the waste liquid after acid washing and water washing by using a sodium hydroxide solution and then carrying out subsequent sewage treatment;
the fifth step: drying, namely drying the activated carbon subjected to acid washing and water washing by using a drying furnace to ensure that the water content reaches 5-10%;
and a sixth step: and (4) screening and packaging, wherein the dried finished product material must be screened, dedusted and packaged according to the specification of the granularity requirement.
Preferably, the acetic acid solution concentration is calculated by the formula W ═ mass of acetic acid × percentage content of acetic acid/(mass of water + mass of acetic acid) × 100%.
Preferably, the temperature in the drying furnace is 250-450 ℃.
The invention relates to a process for producing acid-washing activated carbon by using organic acid instead of inorganic acid, which can produce the same product performance, ensure the personal safety of operators and effectively discharge waste liquid. At present, the technology is popularized and used in our company, and the effect is obvious. According to the actual use result, the technology can completely replace hydrochloric acid to be used, and the product requirement is met; the personal safety of workers is guaranteed, and the waste liquid discharge can more easily meet the environmental protection requirement.
The specific implementation mode is as follows:
the first embodiment is as follows:
a method for pickling activated carbon by using organic acid comprises the following specific production steps:
the first step is as follows: preparing acid liquor: adding a proper amount of water into a pickling tank, adding an acetic acid solution into the pickling tank to prepare an acetic acid solution with the concentration of 5%, and adding water and then acetic acid;
the second step is that: acid cleaning, namely heating the prepared acid solution and keeping the temperature to 60 ℃, adding the activated carbon to be cleaned into the acid solution, wherein the surface of the acid solution is 100mm higher than the discharge surface, and fully stirring for 1 hour;
the third step: rinsing, namely after pickling, discharging pickling solution, rinsing, adding tap water into a pickling tank until the material level is 100mm above, heating to 70 ℃ by using steam, fully stirring, preserving heat for 30 minutes, and then changing water to rinse continuously until the pH value of the cleaning solution reaches about 6;
the fourth step: discharging the waste liquid, and neutralizing the waste liquid after acid washing and water washing by using a sodium hydroxide solution and then carrying out subsequent sewage treatment;
the fifth step: drying, namely drying the activated carbon subjected to acid washing and water washing by using a drying furnace to ensure that the water content reaches 5%;
and a sixth step: and (4) screening and packaging, wherein the dried finished product material must be screened, dedusted and packaged according to the specification of the granularity requirement.
Wherein, the calculation formula of the concentration of the acetic acid solution is W ═ mass of acetic acid x percentage content of acetic acid/(mass of water + mass of acetic acid) x 100%. The temperature in the drying furnace is 250 ℃.
Example two:
a method for pickling activated carbon by using organic acid comprises the following specific production steps:
the first step is as follows: preparing acid liquor: adding a proper amount of water into a pickling tank, adding an acetic acid solution into the pickling tank to prepare an acetic acid solution with the concentration of 3%, and adding water and then acetic acid;
the second step is that: acid cleaning, namely heating the prepared acid solution and keeping the temperature to 70 ℃, adding the activated carbon to be cleaned into the acid solution, wherein the surface of the acid solution is 200mm higher than the discharge surface, and fully stirring for 3 hours;
the third step: rinsing, namely after pickling, discharging pickling solution, rinsing, adding tap water into a pickling tank until the pH value of the cleaning solution reaches about 6 until the thickness of the material is 200mm above the surface of the material, heating the material to 80 ℃ by using steam, fully stirring the material, preserving the temperature for 30 minutes, and then changing water to rinse continuously until the pH value of the cleaning solution reaches about 6;
the fourth step: discharging the waste liquid, and neutralizing the waste liquid after acid washing and water washing by using a sodium hydroxide solution and then carrying out subsequent sewage treatment;
the fifth step: drying, namely drying the activated carbon subjected to acid washing and water washing by using a drying furnace to ensure that the water content reaches 5-10%;
and a sixth step: and (4) screening and packaging, wherein the dried finished product material must be screened, dedusted and packaged according to the specification of the granularity requirement.
Wherein, the calculation formula of the concentration of the acetic acid solution is W ═ mass of acetic acid x percentage content of acetic acid/(mass of water + mass of acetic acid) x 100%. The temperature in the drying furnace is 350 ℃.
Example three:
a method for pickling activated carbon by using organic acid comprises the following specific production steps:
the first step is as follows: preparing acid liquor: adding a proper amount of water into a pickling tank, adding an acetic acid solution into the pickling tank to prepare the acetic acid solution with the concentration of 1%, and adding water and then adding acetic acid;
the second step is that: acid washing, namely heating the prepared acid solution and preserving the temperature to 80 ℃, adding activated carbon to be washed into the acid solution, wherein the surface of the acid solution is 300mm higher than the discharge surface, and fully stirring for 6 hours;
the third step: rinsing, namely after pickling, discharging pickling solution, rinsing, adding tap water into a pickling tank until the material level is 300mm above, heating to 90 ℃ by using steam, fully stirring, preserving heat for 30 minutes, and then changing water to continuously rinse until the pH value of the cleaning solution reaches about 6;
the fourth step: discharging the waste liquid, and neutralizing the waste liquid after acid washing and water washing by using a sodium hydroxide solution and then carrying out subsequent sewage treatment;
the fifth step: drying, namely drying the activated carbon subjected to acid washing and water washing by using a drying furnace to ensure that the water content reaches 10%;
and a sixth step: and (4) screening and packaging, wherein the dried finished product material must be screened, dedusted and packaged according to the specification of the granularity requirement.
Wherein, the calculation formula of the concentration of the acetic acid solution is W ═ mass of acetic acid x percentage content of acetic acid/(mass of water + mass of acetic acid) x 100%. The temperature in the drying furnace is 450 ℃.
Claims (3)
1. A method for pickling activated carbon by using organic acid is characterized by comprising the following steps: the specific production steps are as follows:
the first step is as follows: preparing acid liquor: adding a proper amount of water into a pickling tank, adding an acetic acid solution into the pickling tank, and preparing the acetic acid solution with the concentration less than or equal to 5 percent, wherein water is added firstly, and then acetic acid is added;
the second step is that: acid washing, namely heating the prepared acid solution and keeping the temperature to 60-80 ℃, adding activated carbon to be washed into the acid solution, wherein the surface of the acid solution is 100-300mm higher than the material surface, and fully stirring for 1-6 hours;
the third step: rinsing, namely after pickling is finished, discharging pickling solution, rinsing, adding tap water into a pickling tank until the temperature is 100-300mm above the surface of the material, heating to 70-90 ℃ by using steam, fully stirring, preserving heat for 30 minutes, and then changing water to continue rinsing until the pH value of the cleaning solution reaches about 6;
the fourth step: discharging the waste liquid, and neutralizing the waste liquid after acid washing and water washing by using a sodium hydroxide solution and then carrying out subsequent sewage treatment;
the fifth step: drying, namely drying the activated carbon subjected to acid washing and water washing by using a drying furnace to ensure that the water content reaches 5-10%;
and a sixth step: and (4) screening and packaging, wherein the dried finished product material must be screened, dedusted and packaged according to the specification of the granularity requirement.
2. The method for pickling activated carbon with organic acid according to claim 1, wherein: the calculation formula of the concentration of the acetic acid solution is W ═ mass of acetic acid x percentage content of acetic acid/(mass of water + mass of acetic acid) x 100%.
3. The method for pickling activated carbon with organic acid according to claim 1, wherein: in the fifth step, the temperature in the drying furnace is 250-450 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110104421.9A CN112678823A (en) | 2021-01-26 | 2021-01-26 | Method for pickling activated carbon by using organic acid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110104421.9A CN112678823A (en) | 2021-01-26 | 2021-01-26 | Method for pickling activated carbon by using organic acid |
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| Publication Number | Publication Date |
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| CN112678823A true CN112678823A (en) | 2021-04-20 |
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| CN202110104421.9A Pending CN112678823A (en) | 2021-01-26 | 2021-01-26 | Method for pickling activated carbon by using organic acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113813941A (en) * | 2021-10-22 | 2021-12-21 | 大同市贵义炭素有限公司 | Activated carbon treatment process and equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539112A (en) * | 2013-10-09 | 2014-01-29 | 中国科学院城市环境研究所 | Acid pickling process and acid pickling system for active carbon |
| CN106099108A (en) * | 2016-08-30 | 2016-11-09 | 湖北宇电能源科技股份有限公司 | A kind of preparation method of LITHIUM BATTERY graphite/absorbent charcoal composite material |
| CN109422266A (en) * | 2017-09-01 | 2019-03-05 | 中国科学院大连化学物理研究所 | A kind of industrial washing purification process of activated carbon raw material |
-
2021
- 2021-01-26 CN CN202110104421.9A patent/CN112678823A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103539112A (en) * | 2013-10-09 | 2014-01-29 | 中国科学院城市环境研究所 | Acid pickling process and acid pickling system for active carbon |
| CN106099108A (en) * | 2016-08-30 | 2016-11-09 | 湖北宇电能源科技股份有限公司 | A kind of preparation method of LITHIUM BATTERY graphite/absorbent charcoal composite material |
| CN109422266A (en) * | 2017-09-01 | 2019-03-05 | 中国科学院大连化学物理研究所 | A kind of industrial washing purification process of activated carbon raw material |
Non-Patent Citations (1)
| Title |
|---|
| 李望: "《工业废水综合处理研究》", 30 June 2017, 天津科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113813941A (en) * | 2021-10-22 | 2021-12-21 | 大同市贵义炭素有限公司 | Activated carbon treatment process and equipment |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Block a, science and Technology Park, high tech Development Zone, Yinchuan City, Ningxia Hui Autonomous Region Applicant after: Ningxia Huahui Environmental Protection Technology Co.,Ltd. Address before: 7-9, 17 / F, Hengtai business building, 888-1 Huanghe East Road, Jinfeng District, Yinchuan City, Ningxia Hui Autonomous Region Applicant before: NINGXIA HUAHUI ACTIVATED CARBON Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20210420 |