CN108283937A - A kind of laboratory exhaust gas processing method and device - Google Patents
A kind of laboratory exhaust gas processing method and device Download PDFInfo
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- CN108283937A CN108283937A CN201810201893.4A CN201810201893A CN108283937A CN 108283937 A CN108283937 A CN 108283937A CN 201810201893 A CN201810201893 A CN 201810201893A CN 108283937 A CN108283937 A CN 108283937A
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- exhaust gas
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- packed tower
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- 238000003672 processing method Methods 0.000 title abstract description 6
- 239000007789 gas Substances 0.000 claims abstract description 48
- 239000011347 resin Substances 0.000 claims abstract description 31
- 229920005989 resin Polymers 0.000 claims abstract description 31
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002250 absorbent Substances 0.000 claims abstract description 15
- 230000002745 absorbent Effects 0.000 claims abstract description 15
- 239000002912 waste gas Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 7
- 238000005554 pickling Methods 0.000 claims abstract description 7
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 230000003197 catalytic effect Effects 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000003054 catalyst Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 238000010025 steaming Methods 0.000 claims description 8
- 230000004913 activation Effects 0.000 claims description 6
- 239000003518 caustics Substances 0.000 claims description 6
- 239000011941 photocatalyst Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 2
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000002203 pretreatment Methods 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 2
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000010805 inorganic waste Substances 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 101100269850 Caenorhabditis elegans mask-1 gene Proteins 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 240000008790 Musa x paradisiaca Species 0.000 description 1
- 235000018290 Musa x paradisiaca Nutrition 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- GJRQTCIYDGXPES-UHFFFAOYSA-N iso-butyl acetate Natural products CC(C)COC(C)=O GJRQTCIYDGXPES-UHFFFAOYSA-N 0.000 description 1
- FGKJLKRYENPLQH-UHFFFAOYSA-M isocaproate Chemical compound CC(C)CCC([O-])=O FGKJLKRYENPLQH-UHFFFAOYSA-M 0.000 description 1
- OQAGVSWESNCJJT-UHFFFAOYSA-N isovaleric acid methyl ester Natural products COC(=O)CC(C)C OQAGVSWESNCJJT-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/06—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing polymers
-
- 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
- B01D53/007—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 irradiation
-
- 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
-
- 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
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/804—UV light
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Toxicology (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The present invention relates to a kind of laboratory exhaust gas processing method and device, laboratory exhaust gas passes through the pretreatment units such as alkali cleaning, pickling and drying successively, first removal acidity and alkaline gas.Then dry waste gas, which enters, is filled with load nano-TiO2Macroporous absorbent resin layer, under the catalytic action of ultraviolet light, occur absorption and oxidation reaction, efficiently remove the organic pollution in exhaust gas, realize the qualified discharge of laboratory exhaust gas.Technique according to the present invention is simple and convenient to operate with equipment, purification efficiency is high, operating cost is low.
Description
Technical field
The present invention relates to a kind of laboratory exhaust gas processing method and devices, belong to the technical field of exhaust-gas treatment.
Background technology
Laboratory exhaust gas has the characteristics that complicated component, intermittent discharge, includes mainly that inorganic waste gases and organic exhaust gas two are big
Class.Inorganic waste gases include mainly：Nitrogen oxides, sulfuric acid mist, hydrogen chloride, hydrogen fluoride, hydrogen sulfide, sulfur dioxide, ammonia etc..And have
Machine exhaust gas includes mainly aromatics：Benzene,toluene,xylene, styrene etc.；Aldoketones：Formaldehyde, acetaldehyde, glutaraldehyde, butyraldehyde, third
Ketone, cyclohexanone, methyl ethyl ketone, acetophenone etc.；Esters：Isobutyl acetate, ethyl acetate, butyl acetate, methyl acetate, banana oil
Deng；Alcohols：Methanol, ethyl alcohol, butanol, isopropanol, ethylene glycol etc..These gases are directly discharged in air, can aggravate acid rain
It is formed, promotes O3And PM2.5Generation, seriously endanger health.
Negative pressure is generally taken out in laboratory for the health of Protection personnel using draught cupboard at present, and experiment exhaust gas is passed through
Ventilation shaft is discharged to outdoor, but the exhaust gas of unprocessed mistake is directly discharged into air, will certainly be adversely affected to external environment.
Currently used laboratory exhaust gas processing method is spray+active carbon absorption technology, but is difficult to regenerate in view of activated carbon, is adsorbed
Become dangerous waste after organic exhaust gas, needs to be further processed, increase the operating cost of the technique.
Invention content
In response to the problems existing in the prior art, the purpose of the present invention is to provide a kind of laboratory exhaust gas processing methods and dress
It sets.By in macroporous absorbent resin area load nano-TiO2Method, coupled absorption and oxidation technology, improved UV/
nmTiO2/ macroporous absorbent resin system to the treatment effect of laboratory organic exhaust gas, realize organic exhaust gas efficient removal and
The automatic regeneration of resin.Process equipment according to the present invention is simple and convenient to operate, purification efficiency is high, operating cost is low.
To achieve the goals above, technical solution provided by the invention is：
A kind of laboratory exhaust gas processing photochemical catalyst, preparation method includes the following steps：
1) a certain amount of macroporous absorbent resin is weighed, flowed back with absolute ethyl alcohol in Soxhlet extractor washing 8h or more, is gone
It except impurity, and is placed at 60 DEG C that drying to constant weight, is put in spare in drier；
2) resin after a certain amount of extracting is weighed at room temperature to be activated, first 3%NaOH solution is used to impregnate 8h, with the leavened water of steaming
It is washed till neutrality；It uses 5%HC1 solution to impregnate 8h again, neutrality is washed to steaming is leavened；The above process is repeated 3 times, dries, and is activated
Resin afterwards；
3) resin after a certain amount of step 2) activation is weighed at room temperature, and nano-TiO is added2Solution, ultrasonic 20min, then
With steaming leavened water washing catalyst 5 times, drying, load nano-TiO is obtained2Macroporous absorbent resin photochemical catalyst.
The nano-TiO2A concentration of 0.5gL of solution-1。
Resin after the activation and nano-TiO2The ratio of solution is：Resin per 100mg after activation is added 120mL and receives
Rice TiO2Solution.
In step 3), ultrasonic frequency 55KHz.
The method of the present invention uses a kind of device for processing laboratory waste gas, including caustic wash unit, pickling unit and dry list
First pretreating device, removal acidity and alkaline gas；Then dry waste gas, which enters, is filled with load nano-TiO2Macroporous absorption tree
Fat photocatalyst layer occurs absorption and oxidation reaction, efficiently removes organic dirt in exhaust gas under the catalytic action of ultraviolet light
Object is contaminated, realizes the qualified discharge of laboratory exhaust gas.
The caustic wash unit includes the first spray packed tower, the first return-flow system, the first stainless steel water pump and circulation alkali liquor
Pond；The pickling unit includes the second spray packed tower, the second return-flow system, the second stainless steel water pump and cycle acid bath.
Laboratory exhaust gas by gas gathering mask, air hose, the first corrosive resistant fan, after successively pass through the first spray packed tower, second
Spray packed tower, the first spray packed tower reflux lye, the second spray packed tower reflux acid solution；Afterwards by drier, into
Enter to be placed with load nano-TiO2Macroporous absorbent resin photocatalyst layer light-catalyzed reaction tower, reached after the second corrosive resistant fan
Mark discharge.
Ultraviolet lamp wavelength is 254nm, TiO2Grain size is 40-50nm, and time of contact 15s, reaction temperature is room temperature.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention is received using macroporous absorbent resin as catalyst carrier, using ultrasound-enhanced dipping method in its area load
Rice TiO2Prepare new catalyst, ultrasonic frequency 55KHz, TiO2Grain size is 40-50nm, and ultraviolet lamp wavelength is 254nm, is connect
It is 15s to touch the time.UV/nmTiO2/ macroporous absorbent resin system has fully coupled suction-operated and the OH free radicals of resin
Strong oxidation improves the treatment effect to laboratory organic exhaust gas.The process stabilizing is run 180 days, and exit gas reaches
It arrives《Discharge standard of air pollutants》(GB16297-1996), nano-TiO is loaded2Macroporous absorbent resin repeatable make
With.
Present invention is generally directed to current laboratory exhaust gas treatment technology, there are the bottlenecks such as operating cost height and secondary pollution to ask
Topic carries out acid, Alkali absorption pretreatment, then uses UV/nmTiO first2/ macroporous absorbent resin system Coupling Adsorption and oxidation skill
Art efficiently removes removal organic polluter, it is ensured that laboratory exhaust gas being capable of qualified discharge.
Description of the drawings
Fig. 1：The process flow diagram of the present invention.
In figure：1- gas gathering masks, 2- air hoses, the first corrosive resistant fans of 3-, the first spray packed towers of 4-, the first return-flow systems of 5-,
6- the first stainless steel water pumps, 7- circulation alkali liquid pools, the second spray packed towers of 8-, the second return-flow systems of 9-, the second stainless steel waters of 10-
Pump, 11- recycle acid bath, 12- driers, 13- light-catalyzed reaction towers, the second corrosive resistant fans of 14-, 15-pH inductive probes.
Specific implementation mode
The present invention is further explained in the light of specific embodiments.
A kind of device for processing laboratory waste gas, including caustic wash unit, pickling unit and drying unit pretreating device, removal
Acid and alkaline gas；Then dry waste gas, which enters, is filled with load nano-TiO2Macroporous absorbent resin photocatalyst layer, in purple
Under the catalytic action of outer light, absorption and oxidation reaction occurs, efficiently removes the organic pollution in exhaust gas, realizes that laboratory is useless
The qualified discharge of gas.
The caustic wash unit includes the first spray packed tower 4, the first return-flow system 5, the first stainless steel water pump 6 and circulation alkali
Liquid pool 7；The pickling unit includes the second spray packed tower 8, the second return-flow system 9, the second stainless steel water pump 10 and recycle acid
Liquid pool 11.
Laboratory exhaust gas by gas gathering mask 1, air hose 2, the first corrosive resistant fan 3, after successively pass through the first spray packed tower 4,
Second spray packed tower 8, the reflux of the first spray packed tower 4 lye, the second spray packed tower 8 reflux acid solution；By overdrying
Dry device 12, into being placed with load nano-TiO2Macroporous absorbent resin photocatalyst layer light-catalyzed reaction tower 13, by second
Qualified discharge after corrosive resistant fan 14.
Ultraviolet lamp wavelength is 254nm, TiO2Grain size is 40-50nm, and time of contact 15s, reaction temperature is room temperature.
It is equipped with pH inductive probes 15 between first corrosive resistant fan, 3 and first spray packed tower 4, automatic control system can be passed through
System realizes the first spray packed tower, the automatic opening of the second filler spray column and closure.
Macroporous adsorbent resin photochemical catalyst is prepared as：A certain amount of macroporous absorbent resin is weighed, with absolute ethyl alcohol in Soxhlet
Reflux washing 8h or more, removes impurity in extractor, and is placed at 60 DEG C that drying to constant weight, is put in spare in drier.Room
The resin after a certain amount of extracting is weighed under temperature to be activated, first 3%NaOH solution is used to impregnate 8h, in being then washed to steaming is leavened
Property；5%HC1 solution is used to impregnate 8h again, same to be washed to neutrality with steaming is leavened, the above process is repeated 3 times, drying for standby.At room temperature
The resin after activation is weighed, 0.5gL is added-1Nano-TiO2Solution, ultrasonic 20min are then used and are steamed leavened water washing catalyst 5
It is secondary, drying for standby.
Embodiment 1
As H in laboratory exhaust gas2A concentration of 150mgL of S-1, toluene concentration 300mgL-1When, reactor outlet H2S
A concentration of 0.0mgL-1, toluene concentration 15.0mgL-1, H2The removal rate of S and toluene is respectively 100.0% and 95.0%.
Embodiment 2
As NH in laboratory exhaust gas3A concentration of 120mgL-1, acetone concentration 370mgL-1When, reactor outlet NH3
A concentration of 0.0mgL-1, acetone concentration 7.4mgL-1, H2The removal rate of S and toluene is respectively 100.0% and 98.0%.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, any ripe
Professional and technical personnel is known, without departing from the scope of the present invention, according to the technical essence of the invention, to above real
Apply any simple modification, equivalent replacement and improvement etc. made by example, still fall within technical solution of the present invention protection domain it
It is interior.
Claims (10)
1. a kind of laboratory exhaust gas handles photochemical catalyst, it is characterised in that：Preparation method includes the following steps：
1) a certain amount of macroporous absorbent resin is weighed, flowed back with absolute ethyl alcohol in Soxhlet extractor washing 8h or more, goes to clean
Matter, and it is placed at 60 DEG C that drying to constant weight, it is put in spare in drier；
2) resin after a certain amount of extracting is weighed at room temperature to be activated, first 3%NaOH solution is used to impregnate 8h, is washed to steaming is leavened
It is neutral；It uses 5%HC1 solution to impregnate 8h again, neutrality is washed to steaming is leavened；The above process is repeated 3 times, dries, after being activated
Resin；
3) resin after a certain amount of step 2) activation is weighed at room temperature, and nano-TiO is added2Solution, ultrasonic 20min are then leavened with steaming
It is water washing catalyst 5 times, dry, obtain load nano-TiO2Macroporous absorbent resin photochemical catalyst.
2. laboratory exhaust gas according to claim 1 handles photochemical catalyst, it is characterised in that：The nano-TiO2Solution
A concentration of 0.5gL-1。
3. laboratory exhaust gas according to claim 1 handles photochemical catalyst, it is characterised in that：Resin after the activation with
Nano-TiO2The ratio of solution is：120mL nano-TiOs are added in resin per 100mg after activation2Solution.
4. laboratory exhaust gas according to claim 1 handles photochemical catalyst, it is characterised in that：In step 3), ultrasonic wave frequency
Rate is 55KHz.
5. a kind of device for processing laboratory waste gas, it is characterised in that：Including caustic wash unit, pickling unit and drying unit pre-treatment
Device, removal acidity and alkaline gas；Then dry waste gas enters the load nano-TiO for being filled with claim 1 preparation2Macropore
Resin photocatalyst layer is adsorbed, under the catalytic action of ultraviolet light, absorption and oxidation reaction occurs, efficiently removes in exhaust gas
Organic pollution realizes the qualified discharge of laboratory exhaust gas.
6. device for processing laboratory waste gas according to claim 5, it is characterised in that：The caustic wash unit includes the first spray
Drench packed tower, the first return-flow system, the first stainless steel water pump and circulation alkali liquid pool；The pickling unit includes the second spraying filler
Tower, the second return-flow system, the second stainless steel water pump and cycle acid bath.
7. device for processing laboratory waste gas according to claim 6, it is characterised in that：Laboratory exhaust gas by gas gathering mask,
Air hose, the first corrosive resistant fan, after successively pass through the first spray packed tower, the second spray packed tower, first spray packed tower
Flow back lye, the second spray packed tower reflux acid solution；Afterwards by drier, into being placed with load nano-TiO2Macroporous absorption tree
The light-catalyzed reaction tower of fat photocatalyst layer, the qualified discharge after the second corrosive resistant fan.
8. device for processing laboratory waste gas according to claim 6, it is characterised in that：In first corrosive resistant fan and
It is equipped with pH inductive probes between one spray packed tower, can realize the first spray packed tower, the second spraying filler by robot control system(RCS)
The automatic opening of tower and closure.
9. device for processing laboratory waste gas according to claim 4, it is characterised in that：Ultraviolet lamp wavelength is 254nm, TiO2
Grain size is 40-50nm, time of contact 15s.
10. device for processing laboratory waste gas according to claim 4, it is characterised in that：Reaction temperature is room temperature.
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| CN201810201893.4A CN108283937A (en) | 2018-03-12 | 2018-03-12 | A kind of laboratory exhaust gas processing method and device |
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