CN100512931C - Method and device for fathering bitumen waste gases - Google Patents
Method and device for fathering bitumen waste gases Download PDFInfo
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- CN100512931C CN100512931C CNB2007100712909A CN200710071290A CN100512931C CN 100512931 C CN100512931 C CN 100512931C CN B2007100712909 A CNB2007100712909 A CN B2007100712909A CN 200710071290 A CN200710071290 A CN 200710071290A CN 100512931 C CN100512931 C CN 100512931C
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- Treating Waste Gases (AREA)
Abstract
The invention discloses asphalt waste gas governing method, wherein, the procedure is that after the waste gas is concentrated by a collecting pipeline, cooling and purification are carried out through a spray pump purification tower, and partial oily substance is condensed and intercepted in the spray pump purification tower; after repeated circulation, oil content of the oily substance is recycled; the remain water is continued to be absorbed circularly in the spray pump purification tower; waste gas purified in the spray pump purification tower enters an oil bathing tank and a plasma oxidizer to be further processed, and then is discharged through an induced draft fan when reaching the mark. An equipment used for processing the asphalt waste gas by the method is also provided by the invention. The invention has the advantages that advantages of various asphalt waste gas governing techniques are synthesized; the running cost is low; the purification efficiency is high; the invention can be widely applied to asphalt waste gas engineering governance.
Description
Technical field
The present invention relates to exhaust gas treatment technology, refer in particular to a kind of improvement method and device of pitch waste gas.
Background technology
Pitch is the organic material as a form of gel of a kind of brownish black, comprises four kinds of bitumen, asphalt, shale tar pitch and coal tar asphaltes etc.Main component is asphalitine and resin, and next has the compound of higher boiling mineral oil and a spot of oxygen, sulphur and chlorine.Glossy, be liquid, semisolid or solid state, matter is crisp during low temperature, and caking property and antiseptic property are good.
Pitch is widely used in a lot of industries because its product property is stable, high temperature resistant, flammable.
(1) pitch continues deep processing, can obtain pitch fibers, makes carbon fiber through carbonization again, is the important enhancing body of high-quality carbon fiber composite, and this is the senior application of pitch.
(2) asphalt can burn till coke, is petroleum coke, is the main fuel and the carbon source of steel-making.All right broken back and anthracite and liquid bitumen etc., blast furnace fireproof material, electrolytic aluminium anode, electric furnace steel making electrode, carbon brush for electric machine, chemical cell positive electrode, heat exchanger and high temperature resistant solid lubricant etc. are made in mixed moulding, and this is the most important effect of pitch.
(3) pitch can be used as various anticorrosive paints, coatings, insulation coiled sheet, water-repellent paint and waterproof roll etc.
The pitch of unprocessed mistake has an excitant to mucocutaneous, and light toxic action and oncogenicity effect are arranged.The main infringement of pitch has: photoxic dermatitis, skin are decreased and are limited to expose portions such as face, neck; Melanose, skin decreases and often is symmetrically distributed in exposure portion, in the form of sheets, is brown-brown deeply-brown-black; Occupational acne; The thermal burn that verrucous vegetation and accident cause.In addition, also have dizzy, alliteration, constitutional symptom such as headache, uncomfortable in chest, weak, nauseating, poor appetite and eye, nose, pharyngeal irritation.Prove that through scientific experimentation 3,4 contained BaPs are the one of the main reasons that cause cutaneum carcinoma, lung cancer, cancer of the stomach and cancer of the esophagus in pitch and the glance coal.
The yellow gas of overflowing together along with flue gas when bitumen flue gas generally is high-temperature process, it is a kind of imperceptible volatile granule that has, its composition is extremely complicated, nearly more than 1000 kinds of materials are formed, that has analyzed out now just has a kind more than 100, what wherein content was maximum is multiring aromatic hydrocarbon substance, secondly contains the cycle compound of oxygen, nitrogen, sulphur in addition.Bitumen flue gas is present in the air with aerosol form usually.Existing pitch volatile component condenses in the flue gas solid, liquid particles also have part to be the organic matter of steam condition.Many in these materials have a carcinogenesis, is exactly universally acknowledged carcinogenic substance at present as polycyclic arene compound.According to relevant document and data, asphalt smoke concentration is about 200～400mg/m
3, polycyclic arene compound concentration is about 0.21～2.342mg/m
3
In the production process of carbon product, particularly the present both at home and abroad purification method of bitumen flue gas use comparatively general have following several:
1. washing method
Utilize liquid (water or solvent) to absorb the harmful substance in the waste gas, this method can reach the purpose of purifying exhaust air, contains fluid and needs to handle but produced simultaneously.
2. firing method
Utilize the characteristic that polymer substance in the waste gas can oxidizing fire, it is become innocuous gas discharge.Firing method can be divided into methods such as direct burning, catalysis, energy supplement, an air blast and secondary air blast again.
3. absorption method
The gas introducing is equipped with in the tower of porous adsorbing medium (active carbon etc.), utilizes the surperficial adsorption capacity of adsorbent, remove part solid particle in the waste gas, gas is purified.Need activation or replacing after adsorbing medium is saturated.
4. high-pressure electrostatic method
The high-pressure electrostatic method is to rely on electrostatic interaction, makes particulate in the glance coal after charged, is deposited on the pole plate, reaches the purpose of asphalt flue gas purifying.The high-pressure electrostatic method can be divided into two kinds of wet type and dry types again.
Above-mentioned several mode all has a successful application industrial.Wherein, washing method investment and cost are relatively low, are applicable to medium-sized and small enterprises; Firing method is applicable to high-concentration organic waste gas, and when being used for the processing of low concentration gas, energy consumption sharply increases, and operating cost can't be accepted; The key that absorption method uses properly is in conjunction with practical condition, find suitable adsorbent (often to adopt aluminium oxide as adsorbent as aluminum electrolysis industry, the aluminium oxide that adsorbs after saturated returns electrolytic cell as raw materials for production, with regard to the good problem that solves adsorbent); The investment of high-pressure electrostatic method is big, generally is applied to large enterprise, and this method operating cost is low, but also has problems such as the pitch that captures is difficult to strike off.
Summary of the invention
Defective at present processing bitumen flue gas existence, the invention provides a kind of fathering bitumen waste gases method, be achieved by spray cleaning-washing-oxidation technology is optimized integration, this method and apparatus operating cost is lower, and the gas after the improvement can reach discharge standard.
A kind of fathering bitumen waste gases method may further comprise the steps:
(1) collects waste gas;
(2) the waste gas water of collecting is sprayed, cools off, purifies, reclaim the oily matter in the waste gas;
(3) purified gas is washed, remove oily matter and organic gas remaining in the gas;
(4) gas after the washing is carried out plasma oxidation and handle, remove remaining harmful substance in the gas;
(5) gas after discharge is handled.
The present invention also provides a kind of fathering bitumen waste gases device,
A kind of fathering bitumen waste gases device, form by the collection conduit, spray purification tower, oil bath jar, adsorption tanks, air-introduced machine and the aiutage that connect successively, pitch waste gas is after collection conduit is concentrated, and the process spray purification tower cools off and purifies, in this unit, gas temperature reduces, the part oily matter condenses, and is trapped within the spray purification tower, after repeatedly circulating, reclaim the oily matter in the gas, remainder water continues to recycle in spray purification tower; Purified gas enters the oil bath jar and washs, and according to the same sex principle that mixes, remaining oily matter and organic gas are absorbed by oil bath and remove in the gas; Gas after the washing enters the plasma oxidation device, and remaining harmful substance is by further oxidation Decomposition in the gas, and purified gas passes through the aiutage qualified discharge by air-introduced machine.
Described collection conduit comprises house steward and some arms, and all arms import house steward, and every arm all is equipped with the dish valve, is convenient to according to production equipment start-stop situation, and control air-flow trend is saved atmospheric pressure lost; House steward is provided with magnetic valve, if flammable particle accumulation too much on the tube wall, the too high meeting of gas temperature causes burning, and this moment, only need close magnetic valve can stop burning, eliminated safe hidden trouble.
Described collection conduit is a steel pipe.
Establish several layers spray thrower, circulating water pool and purifying column in the described spray purification tower, every layer of spray thrower has polypropylene Pall ring packing layer, and the pressure drop of polypropylene Pall ring filler is low, and flux is big, and the mass-transfer efficiency height makes that the interior liquid distribution of packing layer is good; Water distribution uniformity in the spray thrower can absorb part dissolubility particle in the waste gas with after gas fully contacts, and reaches the purpose of purifying exhaust air.Waste gas is through three layers of absorption, and absorption liquid flows into circulating water pool certainly, and returns purifying column by water pump lifting, recycles.Absorb water and use to changing near saturated back, dissolved substance is recycled.
Described oil bath pot bottom is equipped with solvent naphtha, the oil bath jar is provided with air inlet, and admission line stretches into below the solvent naphtha liquid level, and admission line is umbrella near the oil level place and is divided into tens of tubules insertion oil levels, this design makes gas fully contact with fluid, and assimilation effect improves greatly; Gas enters in the jar, enters fluid from tubule, and according to the principle that the same sex mixes, organic principle changes liquid phase over to by gas phase in the gas, is dissolved in the oil bath, and gas is purified, and purifies back gas and discharges from the tank top.
Described plasma oxidation device mainly is made up of two parts: the one, and electric control system is made up of large scale integrated circuit, integration module, semiconductor components and devices, produces acceleration, emission, regulation and control, automatic protection circuit.The 2nd, purifying area is formed the plasma square formation by extremely rod, molybdenum filament and annex and is constituted resonance region, resolver, zoneofoxidation, collecting region.Air is after ionization in the purifying area, contain electronics, ion, free radical and neutral particle, the molecule or the atom generation inelastic collision of the harmful substance in itself and the waste gas, each component in deexcitation, ionization, the cracking waste gas, make it to take place the chemical reaction of a series of complexity such as oxidation, thereby remove remaining harmful substance, draw from the top by air-introduced machine after the gas purification.
The present invention optimizes integration spray cleaning-washing-oxidation technology, flue gas to collection is that medium carries out spray cleaning with water, when removing organic matter and dust, reduced the temperature of flue gas, for subsequent treatment is had laid a good foundation, the water absorption liquid is carried out water-oil separating, recycling, and considered perfect comprehensive utilization measures, stopped secondary pollution; The inner special construction that adopts of spray purification tower, built-in multilayer filler of while, multi-stage spray, water fully contacts with waste gas, removes harmful substance wherein; Oil bath canister incoming gas pipeline adopts special construction, oil gas is fully contacted, and equipment resistance is little, volume is little, oily loss is little; Plasma oxidation device technology is simple, little power consumption, easy to maintenance; The present invention has considered perfect safety measure, and technical maturity is reliable, management easy to operate, and the potential safety hazard that system causes production equipment has effectively been eliminated in the equipment of can realizing safe operation steady in a long-term.
Description of drawings
Fig. 1 is the process flow diagram of the inventive method;
Fig. 2 is the structural representation of apparatus of the present invention.
The specific embodiment
As shown in Figure 1, 2, a kind of fathering bitumen waste gases device, form by the collection conduit 1, spray purification tower 2, oil bath jar 3, plasma oxidation device 4, air-introduced machine 5 and the aiutage 6 that connect successively, pitch waste gas is after collection conduit 1 is concentrated, cool off and purification through spray purification tower 2, in this unit, gas temperature reduces, the part oily matter condenses, be trapped within the spray purification tower, and, can reclaim oil content wherein through after repeatedly circulating, remainder water continues to recycle in spray purification tower 2; Waste gas after spray purification tower 2 purifies enters oil bath jar 3 and washs, the principle that mixes according to the same sex, and remaining oily substance and organic gas are absorbed by oil bath and remove in the gas; Gas after the washing enters plasma oxidation device 4, and remaining harmful substance is by further oxidation removal in the gas, and purified gas passes through aiutage 6 qualified discharges by air-introduced machine 5.
Ten of the total asphalt heaters of Zhejiang enterprise, waterproof roll manufacturing equipment two covers, two in asphalt melting pond, one of impregnating bath, every day, asphalt content probably about 20 tons, was mainly 10# and 100# pitch.
According to environmental impact assessment and field investigation, total treating capacity of this exhaust treatment system design is 16000Nm3/h, and the specific design parameter is determined as follows:
(1) melting pot: exhausted air quantity: 1200Nm
3/ h. platform, 12000Nm altogether
3/ h.
(2) pitch bay: exhausted air quantity: 750Nm
3/ h. only is total to 1500Nm
3/ h.
(3) dipping tank: exhausted air quantity: 1000Nm
3/ h+1500Nm
3/ h=2500Nm
3/ h
Pollutant emission meet " odorant pollutant discharge standard " (GB14554-93) and " discharge standard of air pollutants " (GB16297-1996) in the discharge standard that requires of secondary standard.Table specific as follows:
| Pollutant | The highest permission concentration of emission (mg/m 3) | The highest permission rate of discharge (kg/h) | Aiutage height (m) |
| The pitch oil smoke | 40 | 0.18 | 15 |
| Odor concentration | 2000 (dimensionless) | 15 |
Each unit and parameter such as following table:
| Sequence number | Title | | Unit | Quantity | |
| 1 | Spray purification tower | φ2300×7000 | |
1 | |
| 2 | Blower fan | 4-72 | Platform | 1 | |
| 3 | Circulating pump | PFB60-50-125 | |
1 | |
| 4 | The oil bath jar | φ2700×4000 | Only | 1 | |
| 5 | The plasma oxidation device | Only | 1 | ||
| 6 | Pipeline | φ650 | m | 60 |
| 7 | Chimney | φ800 | m | 15 |
| 8 | Air-suction cover | Nonstandard making | Only | 2 |
| 9 | Electrical control | Nonstandard making | |
1 |
| 11 | Elbow, flange, valve | Nonstandard making | Cover | Some |
| 11 | Circulating water pool | 90m 3 | Seat | 1 |
The design spray purification tower adopts three grades of sprays, and adsorption tanks adopt carbon fiber filler, fan delivery 16200m
3/ h, total installation of generating capacity 18kW, the oil recovery rate purifies back gas and reaches discharge standard more than 30%.
Claims (8)
1. fathering bitumen waste gases method is characterized in that may further comprise the steps:
(1) collects waste gas;
(2) waste gas to collecting by the water spray, reduces EGT, reclaims the oily matter in the waste gas, simultaneously the dust in the purifying exhaust air;
(3) purified gas is washed, remove oily matter and organic gas remaining in the gas;
(4) gas after the washing is carried out plasma oxidation and handle, remove remaining harmful substance in the gas, to reach discharge standard;
(5) gas after discharge is handled.
2. fathering bitumen waste gases device, it is characterized in that forming by the collection conduit, spray purification tower, oil bath jar, plasma oxidation device, air-introduced machine and the aiutage that connect successively, pitch waste gas is collected through collection conduit, through spray cleaning tower cooler and purification, reclaims the oily matter in the waste gas; Purified gas enters the oil bath jar and washs, and removes oily matter and organic gas remaining in the gas; Gas after the washing enters the plasma oxidation device, and remaining harmful substance is further removed in the gas, and purified gas passes through the aiutage qualified discharge by air-introduced machine.
3. device as claimed in claim 2 is characterized in that: described collection conduit comprises house steward and some arms, and all arms import house steward, and every arm all is equipped with the dish valve, and house steward is provided with magnetic valve.
4. device as claimed in claim 3 is characterized in that: described collection conduit is a steel pipe.
5. device as claimed in claim 2 is characterized in that: establish several layers spray thrower, a circulating water pool and a purifying column in the described spray purification tower, every layer of spray thrower has packing layer, water distribution uniformity in the spray thrower.
6. device as claimed in claim 5 is characterized in that: described packing layer is the polypropylene Pall ring.
7. device as claimed in claim 2, it is characterized in that: described oil bath pot bottom is equipped with solvent naphtha, the oil bath jar is provided with air inlet, and admission line stretches into below the solvent naphtha liquid level, and admission line is umbrella near the oil level place and is divided into tens of tubules insertion oil levels.
8. device as claimed in claim 2, it is characterized in that: described plasma oxidation device is made up of electric control system and purifying area two parts, when waste gas is introduced purifying area, appliance controling element discharges at purifying area by microwave transmission, make gas ionization, in purifying area, produce a large amount of plasmas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100712909A CN100512931C (en) | 2007-09-11 | 2007-09-11 | Method and device for fathering bitumen waste gases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100712909A CN100512931C (en) | 2007-09-11 | 2007-09-11 | Method and device for fathering bitumen waste gases |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101185837A CN101185837A (en) | 2008-05-28 |
| CN100512931C true CN100512931C (en) | 2009-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100712909A Expired - Fee Related CN100512931C (en) | 2007-09-11 | 2007-09-11 | Method and device for fathering bitumen waste gases |
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| Country | Link |
|---|---|
| CN (1) | CN100512931C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872671A (en) * | 2012-10-15 | 2013-01-16 | 裴登明 | Asphalt waste gas purifying method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102755803A (en) * | 2011-04-29 | 2012-10-31 | 淄博联兴炭素有限公司 | Method and device for treating carbon production soot dust |
| CN103349881B (en) * | 2013-08-08 | 2014-12-10 | 上海台安实业集团有限公司 | Multifunctional environment-friendly asphalt flue gas purification system |
| CN103357238B (en) * | 2013-08-08 | 2015-03-11 | 上海台安实业集团有限公司 | Asphalt fume dust collection and purification system |
| DE102013015280A1 (en) * | 2013-09-16 | 2015-03-19 | Rwe Power Aktiengesellschaft | Process and system for gas scrubbing of aerosol-containing process gases |
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| CN113317207A (en) * | 2021-05-22 | 2021-08-31 | 章国忠 | Sick livestock isolation room that animal doctor's inspection was used |
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2007
- 2007-09-11 CN CNB2007100712909A patent/CN100512931C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872671A (en) * | 2012-10-15 | 2013-01-16 | 裴登明 | Asphalt waste gas purifying method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101185837A (en) | 2008-05-28 |
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