CN107115838A - A kind of low-temperature plasma modified flue gas removes cadmium Ca-base adsorbent and preparation method - Google Patents
A kind of low-temperature plasma modified flue gas removes cadmium Ca-base adsorbent and preparation method Download PDFInfo
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- CN107115838A CN107115838A CN201710515937.6A CN201710515937A CN107115838A CN 107115838 A CN107115838 A CN 107115838A CN 201710515937 A CN201710515937 A CN 201710515937A CN 107115838 A CN107115838 A CN 107115838A
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- low
- temperature plasma
- adsorbent
- cadmium
- flue gas
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/046—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing halogens, e.g. halides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8665—Removing heavy metals or compounds thereof, e.g. mercury
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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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/041—Oxides or hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
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- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
Cadmium Ca-base adsorbent and preparation method are removed the invention discloses a kind of low-temperature plasma modified flue gas, the present invention soaks calcination processing, the CO of process calcining generation using sodium chloride solution first using precipitated calcium carbonate as raw material2Gas makes CaO have larger hole size, so that the final conversion ratios of CaO are improved, while the CaO/NaCl eutectics of generation interlamellar spacing compared with CaO increases, " catalytic action can be played to gas reaction；Finally the flowing between gas phase is promoted with the microstructure for after Low Temperature Plasma Treating, on the one hand changing adsorbent so that adsorbent hole substantially expands, improve except cadmium ability；On the other hand, change the surface property of adsorbent by being constantly be generated chemically reactive substance, make the increase of adsorbent surface oxygen-containing functional group quantity, so that the adsorption capacity of unit mass adsorbent is added, except the increase of cadmium efficiency.
Description
Technical field
Cadmium technical field is taken off the present invention relates to flue gas, and in particular to a kind of low-temperature plasma modified flue gas is inhaled except cadmium calcium base
Attached dose and preparation method.
Background technology
Toxic heavy metal is one of important pollutant for producing during burning city domestic garbage, and these heavy metals are easy
It is enriched on submicron particles and is discharged into air, the concentration of emission of cadmium is 10-40 mgm wherein in chimney tail gas-3, so as to give
Environment causes very big harm.Bulky refuse incineration plant is modernized mainly to inhale using the method for spraying into activated carbon into incineration flue gas
Attached heavy metal formation larger particles are one of important controlling soil moists so as to the method trapped by sack cleaner, but activated carbon valency
Lattice are expensive, and usage amount is big, therefore, and the charcoal non activated solid absorbent of exploitation Cheap highly effective has important practical significance.
Lu Huanliang, Wang Wei et al. soak the method for modifying of calcining with high temperature thermal activation and salt using precipitated calcium carbonate as raw material,
Exploitation is prepared for a series of new Ca-base adsorbents with different physicochemical properties, as a result shows modified calcium-based adsorbent to cadmium
Adsorptivity is significantly improved.But the adsorption capacity of the new Ca-base adsorbent unit mass is small, except cadmium inefficient, and gained is adsorbed
Agent surface property is low.
The content of the invention
Cadmium Ca-base adsorbent and preparation method are removed it is an object of the invention to provide a kind of low-temperature plasma modified flue gas,
To overcome the deficiencies in the prior art.
The object of the present invention is achieved like this：
A kind of low-temperature plasma modified flue gas removes cadmium Ca-base adsorbent, it is characterised in that described Ca-base adsorbent is successively
Utilize salt immersion calcining, low-temperature plasma modified precipitated calcium carbonate.
Described salt is sodium chloride.
A kind of described low-temperature plasma modified flue gas removes the preparation method of cadmium Ca-base adsorbent, it is characterised in that bag
Include following steps：
（1）Salt immersion calcining：The precipitated calcium carbonate for weighing 95-100 parts by weight is put into the sodium chloride solution that mass fraction is 10%
48h is soaked, and is stirred continuously, stands and centrifuges, satin burns 5-6 hours in nitrogen atmosphere after low temperature drying, is cooled to room temperature
Cross 100 mesh sieves, sealing preserve；
（2）Low Temperature Plasma Treating：By step（1）Modified resulting material, which is uniformly positioned in grounding electrode plate, carries out low temperature etc.
Ion modification.
The step（1）It is 900 DEG C that middle satin, which burns temperature,.
The step（2）Middle low temperature plasma gas is oxygen, and regulation power is 44W plasma modifications 10min.
The present invention has following beneficial effect：The present invention is soaked using sodium chloride solution first using precipitated calcium carbonate as raw material
Calcination processing, the CO of process calcining generation2Gas makes CaO have larger hole size, so that the final conversion ratios of CaO are carried
Height, while the CaO/NaCl eutectics of generation interlamellar spacing compared with CaO increases, " catalytic action can be played to gas reaction；Finally use
After Low Temperature Plasma Treating, the microstructure on the one hand changing adsorbent promotes flowing between gas phase so that adsorbent pores
Gap substantially expands, and improves except cadmium ability；On the other hand, the table of adsorbent is changed by being constantly be generated chemically reactive substance
Face performance, makes the increase of adsorbent surface oxygen-containing functional group quantity, so that the adsorption capacity of unit mass adsorbent is added, except cadmium
Efficiency increase.
Embodiment
A kind of low-temperature plasma modified flue gas removes cadmium Ca-base adsorbent, it is characterised in that described Ca-base adsorbent is
Salt immersion calcining, low-temperature plasma modified precipitated calcium carbonate are utilized successively.
Described salt is sodium chloride.
A kind of described low-temperature plasma modified flue gas removes the preparation method of cadmium Ca-base adsorbent, it is characterised in that bag
Include following steps：
（1）Salt immersion calcining：The precipitated calcium carbonate for weighing 95-100 parts by weight is put into the sodium chloride solution that mass fraction is 10%
48h is soaked, and is stirred continuously, stands and centrifuges, satin burns 5-6 hours in nitrogen atmosphere after low temperature drying, is cooled to room temperature
Cross 100 mesh sieves, sealing preserve；
（2）Low Temperature Plasma Treating：By step（1）Modified resulting material, which is uniformly positioned in grounding electrode plate, carries out low temperature etc.
Ion modification.
The step（1）It is 900 DEG C that middle satin, which burns temperature,.
The step（2）Middle low temperature plasma gas is oxygen, and regulation power is 44W plasma modifications 10min.
Claims (5)
1. a kind of low-temperature plasma modified flue gas remove cadmium Ca-base adsorbent, it is characterised in that described Ca-base adsorbent be according to
Secondary utilization salt immersion calcining, low-temperature plasma modified precipitated calcium carbonate.
2. a kind of low-temperature plasma modified flue gas according to claim 1 removes cadmium Ca-base adsorbent, it is characterised in that institute
The salt stated is sodium chloride.
3. a kind of low-temperature plasma modified flue gas according to claim 1 removes the preparation method of cadmium Ca-base adsorbent, its
It is characterised by, comprises the following steps：
（1）Salt immersion calcining：The precipitated calcium carbonate for weighing 95-100 parts by weight is put into the sodium chloride solution that mass fraction is 10%
48h is soaked, and is stirred continuously, stands and centrifuges, satin burns 5-6 hours in nitrogen atmosphere after low temperature drying, is cooled to room temperature
Cross 100 mesh sieves, sealing preserve；
（2）Low Temperature Plasma Treating：By step（1）Modified resulting material, which is uniformly positioned in grounding electrode plate, carries out low temperature etc.
Ion modification.
4. a kind of low-temperature plasma modified flue gas according to claim 3 removes the preparation method of cadmium Ca-base adsorbent, its
It is characterised by, the step（1）It is 900 DEG C that middle satin, which burns temperature,.
5. a kind of low-temperature plasma modified flue gas according to claim 3 removes the preparation method of cadmium Ca-base adsorbent, its
It is characterised by, the step（2）Middle low temperature plasma gas is oxygen, and regulation power is 44W plasma modifications 10min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710515937.6A CN107115838A (en) | 2017-06-29 | 2017-06-29 | A kind of low-temperature plasma modified flue gas removes cadmium Ca-base adsorbent and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710515937.6A CN107115838A (en) | 2017-06-29 | 2017-06-29 | A kind of low-temperature plasma modified flue gas removes cadmium Ca-base adsorbent and preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109107523A (en) * | 2018-08-01 | 2019-01-01 | 中南林业科技大学 | Ultra-thin graphite-phase C3N4/ calcite nanosheet composite material and its preparation method and application |
| CN109453733A (en) * | 2018-10-10 | 2019-03-12 | 深圳先进技术研究院 | High-specific surface area modified calcium carbonate filtrate and preparation method thereof and a kind of composite material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623648A (en) * | 2004-10-29 | 2005-06-08 | 清华大学 | Modified calcium-based adsorbent for purification of incineration flue gas and preparation method thereof |
-
2017
- 2017-06-29 CN CN201710515937.6A patent/CN107115838A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1623648A (en) * | 2004-10-29 | 2005-06-08 | 清华大学 | Modified calcium-based adsorbent for purification of incineration flue gas and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 丁卫科 等: "低温等离子改性复合钙基吸附剂烟气脱硫实验研究", 《化工进展》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109107523A (en) * | 2018-08-01 | 2019-01-01 | 中南林业科技大学 | Ultra-thin graphite-phase C3N4/ calcite nanosheet composite material and its preparation method and application |
| CN109107523B (en) * | 2018-08-01 | 2021-04-20 | 中南林业科技大学 | Ultra-thin graphite phase C3N4Calcite nanosheet composite material and preparation method and application thereof |
| CN109453733A (en) * | 2018-10-10 | 2019-03-12 | 深圳先进技术研究院 | High-specific surface area modified calcium carbonate filtrate and preparation method thereof and a kind of composite material |
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