CN104174360A - Preparation method of sludge adsorbent applied to demercuration of smoke - Google Patents
Preparation method of sludge adsorbent applied to demercuration of smoke Download PDFInfo
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- CN104174360A CN104174360A CN201410472926.0A CN201410472926A CN104174360A CN 104174360 A CN104174360 A CN 104174360A CN 201410472926 A CN201410472926 A CN 201410472926A CN 104174360 A CN104174360 A CN 104174360A
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Abstract
The invention discloses a preparation method of a sludge adsorbent applied to the demercuration of smoke. The preparation method of the sludge adsorbent applied to the demercuration of smoke comprises the following steps: (1) drying and grinding; (2) screening; (3) activating; (4) pyrolyzing; (5) discharging and cooling; (6) washing and drying; and (7) grinding and screening to obtain an adsorbent with a particle size of 0.15-0.25. By virtue of the manner, the preparation method of the sludge adsorbent applied to the demercuration of the smoke is capable of preparing the sludge adsorbent by combining sludge with zinc chloride, drying and pyrolyzing; the demercuration efficiency of the sludge adsorbent in the smoke reaches 95% and far greater than that of active carbon; meanwhile, the preparation method is simple, economical and practical.
Description
Technical field
The present invention relates to absorbent preparation, particularly relate to a kind of method for preparing mud adsorbent for flue gas demercuration.
Background technology
Mercury is a kind of heavy metal pollution with extremely strong bio-toxicity in environment, mercury in atmosphere can enter people by respiratory tract and skin, and organic mercury can enter human body by food, once entering human body, organic mercury is just difficult to be discharged from, the mankind's health in serious threat.
Along with the raising of the mankind to environmental consciousness; the special environmental issues of paying attention to of people for environmental pollution; because industrial development needs; in atmosphere, be discharged mercury more and more; coal as the primary energy can produce a large amount of poison gas in combustion process; wherein just have heavy metal element mercury, therefore, solving coal mercury pollution Control Engineering is one of top priority of China's current environment protection.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of method for preparing mud adsorbent for flue gas demercuration, utilizes mud to combine with zinc chloride, the mud adsorbent that drying pyrolysis produces, reach 95% for the demercuration efficiency in flue gas, far above with the removal efficiency of active carbon for mercury, and this method preparation is simple, economical and practical.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of method for preparing mud adsorbent for flue gas demercuration is provided, makes according to following steps:
(1) be dried and grind, the mud raw material of fetching is put into baking oven, freeze-day with constant temperature 32 hours at 108 DEG C of temperature, obtains moisture content lower than 5% dewatered sludge, then in pulverizer, dewatered sludge is pulverized, and grinding particle size is 1～5mm;
(2) screening, the dewatered sludge particle that is 1～5mm by granularity is put into circular screening machine and is carried out particle screen selecting, and the mud granule that filters out particle diameter and be 1～2mm is for subsequent use;
(3) activation, adopts the liquor zinci chloridi that concentration is 1～2mol/L to activate mud granule, is that 1.5g:3.5mL mixes dewatered sludge particle with liquor zinci chloridi according to solid-to-liquid ratio, then at 95 DEG C～105 DEG C, floods 18 hours;
(4) pyrolysis, mud after activation is placed in baking box to 100 DEG C of heated dryings 3 hours, make its moisture content lower than 2%, then dried mud is put into drying oven, be warming up to 560 DEG C～620 DEG C with 8～10 DEG C/min, the adsorbent of 1.5 hours systems of pyrolysis, whole process adopts nitrogen to purge, and nitrogen flow is controlled at 620ml/min;
(5) discharging is cooling, adopts homemade tubular type discharger that the material of drying in road is transported on cooler pan, on described cooler pan, with cooling fluid, material is cooled to 25 DEG C;
(6) cleaning-drying, adopts HCL solution to clean adsorbent, then adopts deionized water to clean, and then at 85 DEG C, is dried 4 hours;
(7) grind and sieve, on grinder, grind and sieve, obtain the adsorbent of 0.15～0.25 particle diameter.
In preferred embodiments of the present invention, in described step 3, chlorination zinc concentration is 1.55mol/L.
In preferred embodiments of the present invention, in described step 5, the concentration of HCL is 2.5 mol/L.
The invention has the beneficial effects as follows: a kind of method for preparing mud adsorbent for flue gas demercuration of the present invention, utilize mud to combine with zinc chloride, the mud adsorbent that drying pyrolysis produces, reach 95% for the demercuration efficiency in flue gas, far above with the removal efficiency of active carbon for mercury, and this method preparation is simple, economical and practical.
Detailed description of the invention
To the technical scheme in the embodiment of the present invention be clearly and completely described below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention comprises:
For a method for preparing mud adsorbent for flue gas demercuration, make according to following steps:
(1) be dried and grind, the mud raw material of fetching is put into baking oven, freeze-day with constant temperature 32 hours at 108 DEG C of temperature, obtains moisture content lower than 5% dewatered sludge, then in pulverizer, dewatered sludge is pulverized, and grinding particle size is 1～5mm;
(2) screening, the dewatered sludge particle that is 1～5mm by granularity is put into circular screening machine and is carried out particle screen selecting, and the mud granule that filters out particle diameter and be 1～2mm is for subsequent use;
(3) activation, adopts the liquor zinci chloridi that concentration is 1～2mol/L to activate mud granule, is that 1.5g:3.5mL mixes dewatered sludge particle with liquor zinci chloridi according to solid-to-liquid ratio, then at 95 DEG C～105 DEG C, floods 18 hours;
(4) pyrolysis, mud after activation is placed in baking box to 100 DEG C of heated dryings 3 hours, make its moisture content lower than 2%, then dried mud is put into drying oven, be warming up to 560 DEG C～620 DEG C with 8～10 DEG C/min, the adsorbent of 1.5 hours systems of pyrolysis, whole process adopts nitrogen to purge, and nitrogen flow is controlled at 620ml/min;
(5) discharging is cooling, adopts homemade tubular type discharger that the material of drying in road is transported on cooler pan, on described cooler pan, with cooling fluid, material is cooled to 25 DEG C;
(6) cleaning-drying, adopts HCL solution to clean adsorbent, then adopts deionized water to clean, and then at 85 DEG C, is dried 4 hours;
(7) grind and sieve, on grinder, grind and sieve, obtain the adsorbent of 0.15～0.25 particle diameter.
Further, in described step 3, chlorination zinc concentration is 1.55mol/L.
Further, in described step 5, the concentration of HCL is 2.5 mol/L.
The invention has the beneficial effects as follows: a kind of method for preparing mud adsorbent for flue gas demercuration of the present invention, utilize mud to combine with zinc chloride, the mud adsorbent that drying pyrolysis produces, reach 95% for the demercuration efficiency in flue gas, far above with the removal efficiency of active carbon for mercury, and this method preparation is simple, economical and practical.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. for a method for preparing mud adsorbent for flue gas demercuration, it is characterized in that, make according to following steps:
(1) be dried and grind, the mud raw material of fetching is put into baking oven, freeze-day with constant temperature 32 hours at 108 DEG C of temperature, obtains moisture content lower than 5% dewatered sludge, then in pulverizer, dewatered sludge is pulverized, and grinding particle size is 1～5mm;
(2) screening, the dewatered sludge particle that is 1～5mm by granularity is put into circular screening machine and is carried out particle screen selecting, and the mud granule that filters out particle diameter and be 1～2mm is for subsequent use;
(3) activation, adopts the liquor zinci chloridi that concentration is 1～2mol/L to activate mud granule, is that 1.5g:3.5mL mixes dewatered sludge particle with liquor zinci chloridi according to solid-to-liquid ratio, then at 95 DEG C～105 DEG C, floods 18 hours;
(4) pyrolysis, mud after activation is placed in baking box to 100 DEG C of heated dryings 3 hours, make its moisture content lower than 2%, then dried mud is put into drying oven, be warming up to 560 DEG C～620 DEG C with 8～10 DEG C/min, the adsorbent of 1.5 hours systems of pyrolysis, whole process adopts nitrogen to purge, and nitrogen flow is controlled at 620ml/min;
(5) discharging is cooling, adopts homemade tubular type discharger that the material of drying in road is transported on cooler pan, on described cooler pan, with cooling fluid, material is cooled to 25 DEG C;
(6) cleaning-drying, adopts HCL solution to clean adsorbent, then adopts deionized water to clean, and then at 85 DEG C, is dried 4 hours;
(7) grind and sieve, on grinder, grind and sieve, obtain the adsorbent of 0.15～0.25 particle diameter.
2. the method for preparing mud adsorbent for flue gas demercuration according to claim 1, is characterized in that, in described step 3, chlorination zinc concentration is 1.55mol/L.
3. the method for preparing mud adsorbent for flue gas demercuration according to claim 1, is characterized in that, in described step 5, the concentration of HCL is 2.5 mol/L.
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| CN201410472926.0A CN104174360A (en) | 2014-09-17 | 2014-09-17 | Preparation method of sludge adsorbent applied to demercuration of smoke |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106622129A (en) * | 2016-12-17 | 2017-05-10 | 安徽师范大学 | Graphite/sludge composite adsorbent, and preparation method and application thereof |
| CN114471460A (en) * | 2022-01-12 | 2022-05-13 | 华中科技大学 | Demercuration adsorbent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903754A (en) * | 2005-07-29 | 2007-01-31 | 南京理工大学 | Preparation method of sludge adsorber used for polluted water treatment |
| CN101024162A (en) * | 2007-01-09 | 2007-08-29 | 国家环境保护总局华南环境科学研究所 | Organic waste-gas adsorbant and preparing method and use |
| CN101301603A (en) * | 2008-07-02 | 2008-11-12 | 环境保护部华南环境科学研究所 | Agent for absorbing fire coal flue gas mercury pollutant and preparation and use thereof |
| CN101391766A (en) * | 2008-10-21 | 2009-03-25 | 广西大学 | Method for preparing active carbon from pulping paper mill sludge |
-
2014
- 2014-09-17 CN CN201410472926.0A patent/CN104174360A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903754A (en) * | 2005-07-29 | 2007-01-31 | 南京理工大学 | Preparation method of sludge adsorber used for polluted water treatment |
| CN101024162A (en) * | 2007-01-09 | 2007-08-29 | 国家环境保护总局华南环境科学研究所 | Organic waste-gas adsorbant and preparing method and use |
| CN101301603A (en) * | 2008-07-02 | 2008-11-12 | 环境保护部华南环境科学研究所 | Agent for absorbing fire coal flue gas mercury pollutant and preparation and use thereof |
| CN101391766A (en) * | 2008-10-21 | 2009-03-25 | 广西大学 | Method for preparing active carbon from pulping paper mill sludge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106622129A (en) * | 2016-12-17 | 2017-05-10 | 安徽师范大学 | Graphite/sludge composite adsorbent, and preparation method and application thereof |
| CN114471460A (en) * | 2022-01-12 | 2022-05-13 | 华中科技大学 | Demercuration adsorbent and preparation method thereof |
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Application publication date: 20141203 |