CN111167245A - Asphalt smoke purification treatment method - Google Patents
Asphalt smoke purification treatment method Download PDFInfo
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- CN111167245A CN111167245A CN202010006492.0A CN202010006492A CN111167245A CN 111167245 A CN111167245 A CN 111167245A CN 202010006492 A CN202010006492 A CN 202010006492A CN 111167245 A CN111167245 A CN 111167245A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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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
- B01D53/007—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
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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
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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
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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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- 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
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- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Biomedical Technology (AREA)
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- Treating Waste Gases (AREA)
Abstract
The invention relates to an asphalt smoke purification treatment method, which comprises the following steps: a. pretreating an asphalt pool; b. treating the water mist spray tower; c. plasma oil fume separation treatment; and d, UV photo-oxidation deodorization treatment. The invention has better effect on the purification treatment of asphalt flue gas.
Description
Technical Field
The invention relates to flue gas purification, in particular to an asphalt smoke purification treatment method.
Background
Asphalt fumes, a pollutant that can be harmful to the environment and human body, are generated during heating and compounding of asphalt.
At present, the domestic asphalt smoke treatment methods mainly comprise an incineration method, a cooling method, an oil adsorption method, a water spraying and washing method and an activated carbon method. In actual use, water spraying washing is generally adopted, and a post-stage treatment device is added, so that the asphalt smoke treatment effect is not ideal due to the following reasons:
1. the incineration method mainly introduces the asphalt smoke into a high-temperature incinerator for incineration, and has the main problems that: A. a large amount of energy is consumed; B. a large amount of nitrogen oxides (NOx) are generated, and the denitration difficulty is high; C. the utilization of high-temperature flue gas.
2. The cooling method is to cool the asphalt smoke firstly, the organic matters with high boiling point in the asphalt smoke are cooled into oily liquid, then gas-liquid separation is carried out, the separated gas is further processed, and the main problems of the cooling method are that: A. the cooling efficiency is low; B. the asphalt smoke contains a large amount of particles, and the cooled oil and the particles are condensed together, so that pipelines in the cooling device are often blocked, and the pipelines are long and difficult to clean.
3. The main reasons for the unsatisfactory effects of the water spray washing and activated carbon method can be summarized as the following points: A. in order to efficiently remove tar and tar gas in asphalt flue gas, the requirement on a wet scrubber is high, and the gas-liquid two-phase has the largest contact chance, namely the larger the contact area of the gas-liquid two-phase is, the better the contact time is, the longer the contact time is, the better the contact chance is; B. the particle size of the sprayed liquid drops (most of the liquid drops are more than 1000 mu m) is far larger than that of tar fog particles (0.1-10 mu m) by using a nozzle adopted by the existing spray washing tower, so that the contact chance is reduced, and even a dead zone that a gas-liquid two phase cannot be contacted exists; C. because water is recycled, the concentration of pollutants (particularly granular pollutants) in water is higher and higher, and the caliber of nozzles of the existing spray washing tower, spray washing tower and the like is smaller (in order to ensure a certain atomization effect), so that the nozzles are easy to block, and the washing effect is poorer and poorer; D. lack of efficient gas, liquid, solid separation devices; E. there is no effective water treatment equipment, because the washing water is recycled, the concentration of the oil mist and the particulate matters washed in the circulating water tank is larger and larger, and if the washing water cannot be cleaned in time, the following consequences can be caused: 1) the concentration of pollutants in the circulating water is increased, so that the washing effect is reduced, and particularly, when oil stains in the water are contacted with high-temperature flue gas, the organic matters which are cooled down originally are volatilized again to form a vicious circle, so that the concentration of the organic pollutants in the gas is increased, and the pressure of the post-treatment is increased; 2) the increase of the concentration of the particulate matter in the circulating water can cause the blockage of the spray head and the pipeline; 3) the sewage pool gives out a gusty of foul smell, which pollutes the environment; the above problems are important reasons for the poor treatment effect of the currently used water washing method. The problem of activated carbon adsorption, activated carbon has strong adsorption capacity to organic pollutants, but has some fatal weaknesses: a) the activated carbon has no capacity of decomposing oily organic matters, and can lose activity quickly once the surface is polluted by oily pollutants. The main smoke is oily pollutant which is very easy to adhere to the surface of the activated carbon, and the service life of the activated carbon is shorter especially under the condition that the pre-stage water washing effect is poor; b) the resistance of the equipment is reduced by using an activated carbon adsorption method; c) the difficulty of treating the activated carbon polluted by the organic matters in the asphalt smoke is increased.
Disclosure of Invention
The invention aims to provide an asphalt smoke purification treatment method which has a good effect on asphalt smoke purification treatment.
The above object of the present invention is achieved by the following technical solutions: a method for purifying and treating asphalt smoke comprises the following steps: a. pretreating an asphalt pool; b. treating the water mist spray tower; c. plasma oil fume separation treatment; and d, UV photo-oxidation deodorization treatment.
By adopting the technical scheme, the asphalt smoke is sequentially subjected to asphalt pool treatment, water mist spray tower treatment, plasma oil smoke separation treatment and UV photo-oxygen deodorization treatment; the pollutants in the waste water can be fully treated and purified; the effect of the purification treatment of the asphalt flue gas is better.
The invention is further configured to: the pretreatment of the asphalt pool is to connect all asphalt smoke exhaust holes to the asphalt pool by pipelines; when asphalt is heated, overflowing asphalt fume can be discharged into an asphalt pool for precipitation, and the residual fume after precipitation is discharged from an outlet at the top of the asphalt pool from top to top.
Through adopting above-mentioned technical scheme, pitch pond preliminary treatment can collect the pitch pond with the large granule pollutant, reduces its condensation and in the follow-up pipeline possibility, makes pitch gas cleaning remain high efficiency throughout.
The invention is further configured to: the water mist spray tower treatment is to guide the asphalt flue gas discharged from the outlet at the top of the asphalt pool into the bottom of the water mist spray tower, and then spray the water mist into the ascending asphalt flue gas by using an atomizer, so that the gas and the liquid are fully contacted, and the water-soluble or large-particle components in the asphalt flue gas are settled.
By adopting the technical scheme, the liquid is fully refined by the atomizer, so that the gas-liquid contact area is greatly increased; spraying water mist on the asphalt smoke to settle water soluble or large particle components in the asphalt smoke so as to achieve the purpose of separating pollutants from clean gas; the method has the advantages that water resources are easy to obtain, and can be recycled after filtration and precipitation, waste of the water resources is reduced to the maximum extent, the water spraying has quite high efficiency in treating large particle components, and the method can play a good pretreatment role in asphalt smoke by matching with an asphalt pool.
The invention is further configured to: the plasma oil fume separation treatment comprises three links of pre-filtration, ionization filtration and oil droplet collection.
By adopting the technical scheme, the asphalt flue gas can be fully separated and purified, and the content of pollutants is greatly reduced.
The invention is further configured to: the method is characterized in that the pre-filtration is firstly carried out on the asphalt smoke treated by the water mist spray tower, so that large-particle oil stains are isolated.
Through adopting above-mentioned technical scheme, can completely cut off the large granule greasy dirt in the pitch flue gas.
The invention is further configured to: the ionization filtration is carried out after the pre-filtration, and the remaining submicron fine particles at the front section are ionized and atomized under the action of a plasma electrostatic field to be charged.
Through adopting above-mentioned technical scheme, can further handle fine particles.
The invention is further configured to: oil drops are collected after ionization filtration, fine charged oil stain particles are adsorbed by an electrode plate in the link to form the oil drops, and the oil drops naturally flow into an oil groove below the oil drops; the residual asphalt smoke gas continuously flows to a subsequent treatment link under the action of a draught fan.
Through adopting above-mentioned technical scheme, can adsorb the tiny particulate matter to the plate electrode on, form oil and drop and carry out the separation with remaining flue gas, purifying effect is better.
The invention is further configured to: the UV photo-oxidation deodorization treatment is to oxidize the asphalt smoke subjected to plasma oil smoke separation treatment into CO2 and H2O under the strong oxidation action of cavities and hydroxyl free radicals, so that the asphalt smoke is thoroughly purified.
By adopting the technical scheme, the residual asphalt flue gas can be thoroughly purified.
The invention is further configured to: the ultraviolet light of the UV light oxygen deodorization treatment adopts a C-waveband light source.
By adopting the technical scheme, the C-waveband light source can crack, break, oxidize and decompose toxic and harmful chemical molecular chains in the asphalt smoke, decompose macromolecular chains into non-toxic and harmless micromolecules, light and gas have no gap at all, the light speed is higher than the speed of the gas by a plurality of times, the C-waveband light source in the photo-oxygen catalytic purifier can completely decompose toxic and harmful organic waste gas, most harmful substances in the gas are decomposed and oxidized into carbon dioxide, water and mineral substances, and secondary pollution is avoided; the peculiar smell removing effect is as high as more than 99%.
In conclusion, the invention has the following beneficial effects:
1. compared with the prior art, the asphalt smoke is subjected to asphalt pool treatment, water mist spray tower treatment, plasma oil fume separation treatment and UV light oxygen deodorization treatment in sequence, pollutants in the asphalt smoke can be sufficiently treated and purified, and the effect of purification treatment on the asphalt smoke is good;
2. the plasma oil fume separation treatment comprises three links of pre-filtration, ionization filtration and oil droplet collection, and has a good purification treatment effect on the asphalt smoke;
3. the ultraviolet light of the UV light oxygen deodorization treatment adopts a C-band light source, the C-band light source can crack, break, oxidize and decompose toxic and harmful chemical molecular chains in the asphalt smoke, decompose macromolecular chains into non-toxic and harmless micromolecules, no gap exists between light and gas, the light speed is several times higher than that of the gas, the C-band light source in the light oxygen catalytic purifier can completely decompose toxic and harmful organic waste gas, most harmful substances in the gas are decomposed and oxidized into carbon dioxide, water and mineral substances, and secondary pollution is avoided; the peculiar smell removing effect is as high as more than 99%.
Detailed Description
Examples
A method for purifying and treating asphalt smoke comprises the following steps: a. pretreating an asphalt pool; b. treating the water mist spray tower; c. plasma oil fume separation treatment; and d, UV photo-oxidation deodorization treatment.
The volatile components of asphalt in the asphalt flue gas can be condensed into solid, liquid particles and organic matters in a steam state.
Wherein, the pretreatment of the asphalt pool is to connect all asphalt smoke exhaust holes to the asphalt pool by pipelines; when asphalt is heated, overflowing asphalt fume can be discharged into an asphalt pool for precipitation, and the residual fume after precipitation is discharged from an outlet at the top of the asphalt pool from top to top.
The water mist spray tower treatment is to guide the asphalt flue gas discharged from the outlet at the top of the asphalt pool into the bottom of the water mist spray tower, and then spray the water mist into the ascending asphalt flue gas by using an atomizer, so that the gas and the liquid are fully contacted, and the water-soluble or large-particle components in the asphalt flue gas are settled.
The plasma oil smoke separation treatment comprises three links of pre-filtration, ionization filtration and oil drop collection, wherein the pre-filtration is firstly carried out on the asphalt smoke treated by the water mist spray tower to isolate large-particle oil stains; then carrying out ionization filtration, namely ionizing and atomizing the remaining submicron fine particles at the front section under the action of a plasma electrostatic field to charge the particles; then collecting oil drops, wherein fine charged oil stain particles are adsorbed by an electrode plate in the link to form the oil drops, and the oil drops naturally flow into a lower oil groove; the residual asphalt smoke gas continuously flows to a subsequent treatment link under the action of a draught fan.
The principle of UV photooxidation deodorization treatment is that under the irradiation of ultraviolet light, cavities generated on the surface of a photocatalyst and hydroxyl radicals generated by further reaction of the cavities and water molecules on the surface of the photocatalyst have extremely high oxidation potential, and under the strong oxidation effect of the cavities and the hydroxyl radicals, organic matters are oxidized and finally completely oxidized into CO2 and H2O; in the treatment of the link, the asphalt smoke after plasma oil smoke separation treatment is completely oxidized into CO2 and H2O under the strong oxidation action of cavities and hydroxyl radicals, and the asphalt smoke is completely purified.
The UV light oxygen deodorization treatment does not need to pretreat the asphalt smoke, such as heating, humidification and the like, can efficiently remove main pollutants such as Volatile Organic Compounds (VOC), inorganic substances, hydrogen sulfide, ammonia gas, thiols and the like and various malodorous gases, and has the purification and deodorization efficiency of more than 99 percent at most.
The ultraviolet light adopts a C-band light source, the C-band light source can crack, break, oxidize and decompose toxic and harmful chemical molecular chains in the asphalt smoke, decompose macromolecular chains into non-toxic and harmless micromolecules, light and gas have no any gap at all, the light speed is several times higher than that of the gas, the C-band light source can completely decompose toxic and harmful organic waste gas in the photo-oxygen catalytic purifier, most harmful substances in the gas are decomposed and oxidized into carbon dioxide, water and mineral substances, and secondary pollution is avoided; the peculiar smell removing effect is as high as more than 99%.
Compared with other existing processing modes, the method has the technical characteristics that: the disinfectant is nontoxic, harmless and free of any side effect, and can continuously sterilize in the environment where people exist; the light ozone and strong ultraviolet ray generated during cracking can spectrally kill various bacteria in the air, the killing rate of legionella, staphylococcus aureus, bacillus subtilis, spores and natural bacteria reaches more than 90 percent, and the absorbable particles are effectively removed.
The C-band ultraviolet ray can be mainly used for removing gases such as hydrogen sulfide, ammonia, benzene, toluene, xylene, formaldehyde, methanol, acetone, urethane, methyl sulfide, carbon disulfide, trimethylamine, dimethyl ether, resin and the like, and sterilizing.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. The asphalt smoke purification treatment method is characterized by comprising the following steps: a. pretreating an asphalt pool; b. treating the water mist spray tower; c. plasma oil fume separation treatment; and d, UV photo-oxidation deodorization treatment.
2. The method for purifying and treating asphalt smoke according to claim 1, characterized in that: the pretreatment of the asphalt pool is to connect all asphalt smoke exhaust holes to the asphalt pool by pipelines; when asphalt is heated, overflowing asphalt fume can be discharged into an asphalt pool for precipitation, and the residual fume after precipitation is discharged from an outlet at the top of the asphalt pool from top to top.
3. The method for purifying and treating asphalt smoke according to claim 2, characterized in that: the water mist spray tower treatment is to guide the asphalt flue gas discharged from the outlet at the top of the asphalt pool into the bottom of the water mist spray tower, and then spray the water mist into the ascending asphalt flue gas by using an atomizer, so that the gas and the liquid are fully contacted, and the water-soluble or large-particle components in the asphalt flue gas are settled.
4. The method for purifying and treating asphalt smoke according to claim 3, characterized in that: the plasma oil fume separation treatment comprises three links of pre-filtration, ionization filtration and oil droplet collection.
5. The method for purifying and treating asphalt smoke according to claim 4, characterized in that: the method is characterized in that the pre-filtration is firstly carried out on the asphalt smoke treated by the water mist spray tower, so that large-particle oil stains are isolated.
6. The method for purifying and treating asphalt smoke according to claim 5, characterized in that: the ionization filtration is carried out after the pre-filtration, and the remaining submicron fine particles at the front section are ionized and atomized under the action of a plasma electrostatic field to be charged.
7. The method for purifying and treating asphalt smoke according to claim 6, characterized in that: oil drops are collected after ionization filtration, fine charged oil stain particles are adsorbed by an electrode plate in the link to form the oil drops, and the oil drops naturally flow into an oil groove below the oil drops; the residual asphalt smoke gas continuously flows to a subsequent treatment link under the action of a draught fan.
8. The method for purifying and treating asphalt smoke according to claim 4 or 7, characterized in that: the UV photo-oxidation deodorization treatment is to oxidize the asphalt smoke subjected to plasma oil smoke separation treatment into CO2 and H2O under the strong oxidation action of cavities and hydroxyl free radicals, so that the asphalt smoke is thoroughly purified.
9. The method for purifying and treating asphalt smoke according to claim 8, characterized in that: the ultraviolet light of the UV light oxygen deodorization treatment adopts a C-waveband light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010006492.0A CN111167245A (en) | 2020-01-03 | 2020-01-03 | Asphalt smoke purification treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010006492.0A CN111167245A (en) | 2020-01-03 | 2020-01-03 | Asphalt smoke purification treatment method |
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| CN111167245A true CN111167245A (en) | 2020-05-19 |
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| CN202010006492.0A Pending CN111167245A (en) | 2020-01-03 | 2020-01-03 | Asphalt smoke purification treatment method |
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| CN207838679U (en) * | 2018-01-16 | 2018-09-11 | 河北交科材料科技有限公司 | The smoke processing system used in rubber modified asphalt production process |
| CN208436600U (en) * | 2018-12-25 | 2019-01-29 | 烟台盛泽环保科技有限公司 | A kind of bituminous mixing plant exhaust treatment system |
-
2020
- 2020-01-03 CN CN202010006492.0A patent/CN111167245A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2005259000A1 (en) * | 2004-06-30 | 2006-01-12 | Tri-Air Developments Limited | Air decontamination device and method |
| CN101961584A (en) * | 2009-07-21 | 2011-02-02 | 贵阳铝镁设计研究院 | Pitch fume purification method and device |
| CN103263830A (en) * | 2013-05-29 | 2013-08-28 | 东北大学 | Method for dealing with foul smell through atomization plasma oxidation-biomass adsorption |
| CN204219958U (en) * | 2014-11-21 | 2015-03-25 | 秦皇岛华瑞煤焦化工有限公司 | Flue gas cleaner |
| WO2016167708A1 (en) * | 2015-04-14 | 2016-10-20 | Lkw Teknik Ab | Ways to clean flue gas emissions in a scrubber |
| CN205288034U (en) * | 2016-01-15 | 2016-06-08 | 三门峡中达化工有限公司 | Circulating absorption system of industrial waste gas treatment |
| CN108070398A (en) * | 2016-11-07 | 2018-05-25 | 简阳市龙兴炭素有限公司 | Carbon roasting furnace asphalt smoke gas purifying recoverying and utilizing method |
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Application publication date: 20200519 |