CN107149835B - A kind of concentration and processing method of the low concentration containing volatile organic compounds - Google Patents
A kind of concentration and processing method of the low concentration containing volatile organic compounds Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
- B01D47/022—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath by using a liquid curtain
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/12—Washers with plural different washing sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D51/00—Auxiliary pretreatment of gases or vapours to be cleaned
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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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
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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
- B01D2258/0258—Other waste gases from painting equipments or paint drying installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
A kind of concentration and processing method of the low concentration containing volatile organic compounds, are related to the processing of organic compounds.1) the first segment water spray containing volatile organic compounds；2) second segment water spray will be carried out containing volatile organic matter by step 1)；3) third section water spray will be carried out containing volatile organic compounds by step 2)；4) circulation of shower water or spray liquid；5) circulation of extract liquor and the desorption containing volatile organic compounds；6) burning containing volatile organic compounds after desorbing.When the amount of the volatile organic matter containing volatile organic compounds is larger and reality in heat there are when oil and gas boiler, the exhaust gas after desorption can also be introduced directly into boiler.When the amount of the volatile organic matter containing volatile organic compounds is smaller, also extractant centralized collection, the concentration desorption, concentrated combustion for being scattered in each point.
Description
Technical field
The present invention relates to the processing of organic compounds, more particularly, to a kind of low concentration containing the dense of volatile organic compounds
Contracting and processing method.
Background technique
Volatile organic matter is often referred under room temperature saturated vapor pressure and is greater than 70Pa, below there is boiling point at 260 DEG C under normal pressure
It mainly include non-methane total hydrocarbons (alkane, alkene with the general designation of volatile organic compound under machine compound or specified conditions
Hydrocarbon, alkynes, aromatic hydrocarbon), oxygen-containing organic compound (aldehyde, ketone, alcohol, ether etc.), halogenated hydrocarbons, nitrogenous compound, sulfur-containing compound etc..
Common volatile organic matter mainly has: benzene,toluene,xylene, ethylbenzene, chlorobenzene, phenol, phenyl amines, methyl phenyl ethers anisole, benzaldehyde,
Nitrobenzene, styrene, chlorophenol, ethylene, trichloro ethylene, cyclopentene, 1- decene, 1- laurylene, methylene chloride, butane, hexane, heptan
Alkane, hexamethyldisiloxane, formaldehyde, propionic acid, ethyl alcohol, isopropanol, propylene glycol, isoprene, acetone, cyclohexanone, cyclopentanone, 3-
Pentanone, 2-HEPTANONE, methyl n-heptyl ketone, ethyl acetate, butyl acetate, isoamyl acetate, ethyl lactate, propylene glycol methyl ether acetate
Deng.
Organic compounds (abbreviation organic compounds or VOCs) containing volatile organic matter, can be according in organic compounds
The component and concentration of VOCs uses condensation method (Chinese patent CN105709559A, CN105854334A), combustion method (Chinese patent
CN105903313A, CN106051792A), absorption method (Chinese patent CN103521030B, CN104128066B,
CN103736359B, CN105771537A), absorption process (Chinese patent CN104275074B, CN103537171B,
CN104338428A, CN105749702A), bioanalysis (Chinese patent CN103521069B, CN104190247B,
CN104689709A, CN104857806A), photocatalysis (Chinese patent CN105833691A), plasma method (Chinese patent
CN105797547A, CN105833677A, CN105797579A) etc. one of method or method combination handled.
Liquid nitrogen condensation method is suitable for the low air quantity organic compounds of high concentration, and organic matter is recyclable or recycles, but needs
Other technologies combination is wanted just to be able to satisfy the emission request of environmental legislation.
The method of heating has direct combustion method (TO), heat exchange type Production by Catalytic Combustion Process (ECO), heat accumulating type catalytic combustion method (RCO), stores
Hot type heats method (RTO) etc., is suitable for almost the improvement of all organic compounds, but low concentration Wind Volume organic compounds are transported
Row higher cost；When containing substance poisonous and hazardous to catalyst in organic compounds, it should be avoided and use Production by Catalytic Combustion Process.
Absorption method suitable for gas temperature it is lower the organic compounds of low concentration and various air quantity administer, with desorption+
Combustion method combination can effectively administer organic compounds；When organic compounds humidity and temperature are higher, biggish containing dust and greasy dirt
When, need to cooperate such as spray, dehumidifying, cooling, filtering, electrostatic precipitation oil removing pretreating process to be pre-processed；Adsorbent
Such as active carbon, zeolite, molecular sieve need regeneration treatment after losing adsorption activity or as dangerous waste disposals.
Absorption process absorbs the organic compounds that can be dissolved in water with water, with diesel oil, vegetable oil, machine according to the similar principle that mixes
Oil, aqueous solution of water-soluble multicomponent organic matter etc. absorb water-insoluble organic gas, and absorbing liquid needs are further processed.
Bioanalysis is applicable in water-soluble low-concentration organic waste gas and administers or handled using extraordinary microorganism specific aim corresponding
Organic matter, operating cost is lower but investment and occupied area are larger.
Photocatalysis and high-level oxidation technology are generally used in the organic compounds processing of super low concentration, can effectively reduce peculiar smell
Generation and diffusion.
The common combination technique for administering organic compounds has condensation+combustion method, absorption+desorption+combustion method, absorption+biology
Method, photocatalysis+bioanalysis etc..Combustion method can thoroughly administer organic compounds, and the higher combustion method cost of technology maturation, concentration is more
Low, heat storage type combustion method can effectively reduce operating cost but cost of investment is larger.Zeolite adsorption-desorption can be to avoid active carbon
Certain defects (such as humidity, dust, desorption temperature, desorption time), but zeolite adsorption capacity is low compared with active carbon, high humility and
Low-boiling-point organic compound exhaust treatment efficiency is lower, and cycles of concentration and adsorption efficiency are also poor at low concentrations；Although having in the market
The molecular sieve that hydrophobic zeolite is even designed according to the molecular size of organic compounds component occurs, but useless for high humility
The regulation effect of gas has to be tested.
10~1000mg/Nm of organic component concentration3Organic compounds be administer difficult point, often interval generate, air quantity
Larger, containing dust, humidity is big, temperature is high, and the choice of technology is more difficult, and investment is big, operating cost is high, regulation effect is unstable, operation
Maintenance is not easy, and single emission source discharge amount is few, but total emission volumn is larger for environment.Common activated carbon adsorption+desorption+is urged
Change combustion method to administer, since active carbon has hydrophily, the moisture in Preferential adsorption exhaust gas, activated carbon pore size distribution is wider
Adsorptive selectivity is lower, i.e. absorption water also adsorbs dust, i.e. humidity and dust is affected to the adsorption capacity of active carbon, due to
Active carbon non-refractory, desorption temperature is lower, and desorption time is longer, and active carbon in absorption again and again and heats desorption certainly
In be easily broken and windage increases, air draft is unsmooth, or even since wind-force distribution is uneven, leads to gas ditch flow short-circuit.Containing dust
Organic compounds need spraying and dedusting, and for the humidity of organic compounds often close to saturation, the adsorption efficiency of adsorbent is very low.High temperature
Then activated carbon adsorption is more difficult for organic compounds, and certain waste organic solvent gas of lipid containing ketone decompose in active carbon to be easy to draw
Ignition calamity needs to spray or inert gas shielding facility.Difficulty is regenerated after active carbon inactivation, disposes mechanism shortage, the machine of active carbon
Structure is less.Adsorption efficiency can be improved using zeolite molecular sieve, modified activated carbon substitution active carbon, but to waste gas humidity and powder
Dust content is more demanding, and preferable preconditioning technique is needed to pre-process.
Under low concentration Wind Volume, active carbon or zeolite absorption generally want multistage to adsorb, and can expire within shorter time of contact
The organic compounds removal rate of foot 90~95% or so.The VOCs organic matter of the low aqueous solubility of large-wind-volume low-concentration intermittent discharge is useless
Gas can meet emission request using multistage aqueous washing-biological processing or may achieve total amount emission reduction targets, but biological treatment cost
Also very high.
Combustion method and bioanalysis are the final process methods of VOCs organic compounds.The core of combustion method under low concentration is
Low-concentration organic waste gas is become high concentration by modes such as collection mode improvement, adsorption-desorptions by the concentration of organic compounds
Organic compounds and reduce burning cost or reduce ignition temperature by modes such as catalysis burnings and reduce cost.Bioanalysis due to
The water solubility that common are machine object exhaust gas is poor, and B/C is relatively low, and application range is limited.Water soluble organic salt such as sodium acetate, lemon
The aqueous solution of sour sodium can effectively adsorb water-insoluble VOCs, but further biological treatment higher cost, absorptive capacity are also limited.
Summary of the invention
Concentration and processing method the purpose of the present invention is to provide a kind of low concentration containing volatile organic compounds.
The present invention the following steps are included:
1) the first segment water spray containing volatile organic compounds, the specific method is as follows:
Water circulating pump and blower are opened, is cleaned containing volatile organic compounds by first segment water spray, removes organic matter
The substances such as dust, greasy dirt, paint in exhaust gas, the preliminary temperature for reducing organic compounds, increase the humidity of organic compounds；It is useless
Water enters circulating water pool, and circulating water pool is designed according to oil removal pool mode, totally-enclosed, and setting removable cover is used for daily cleaning, row
Tracheae is connected with the entrance containing volatile organic compounds of spray column；
In step 1), the mass concentration containing volatile organic matter can be 10~1500mg/Nm3, relative humidity is big
In 50%, air quantity is 1000~500000Nm3/h；Cascade cleaning or spray column cleaning can be used in described clean；The cascade is set
It applies and keeps water recirculated water formation cascade seamless；The wind speed of the spray column can be 1.0~3.0m/s；The sprinkle density can be
4.5~10.5m3/(m2·h)；The organic compounds removal rate is up to 15%~25%.
2) second segment water spray will be carried out containing volatile organic compounds by step 1), the specific method is as follows:
Second segment spray column will be introduced containing volatile organic compounds by step 1), according to organic in organic compounds
The property of object is washed with spray solution circulated sprinkling, and the recirculated water of circulating water pool derives from circulating water pool waste water, circulating water pool with
Extraction equipment is connected, clean water or aqueous solution after volatile organic matter is extracted in extraction equipment, for spraying；
In step 2), the wind speed of the second segment spray column can be 0.5~2.0m/s, the density of spray can for 4.5~
10.5m3/(m2·h)；The relative humidity for going out spray column containing volatile organic compounds is greater than 100%, organic compounds removal rate
Up to 55%~65%；Water, acylate soluble easily in water, organic amine salt soluble easily in water, nothing can be used in the spray solution
Glycerol, benzene can be used in the solute of one of machine salt etc., the acylate soluble easily in water and organic amine salt soluble easily in water
At least one of sodium formate, sodium oxalate, sodium acetate, sodium citrate etc., the inorganic salts can be used in sodium sulphate, sodium carbonate etc.
At least one；Defoaming agent can be added when necessary.
3) third section water spray will be carried out containing volatile organic compounds by step 2), the specific method is as follows:
Third section spray column will be introduced containing volatile organic compounds by step 2), be washed with spray solution circulated sprinkling
It washs, circulating water pool is connected with the spray equipment of step 2), spray derives from extraction equipment cleaning solution extracted or water；
In step 3), the wind speed of the third section spray column can be 0.25~1.0m/s, the density of spray can for 8.5~
15.5m3/(m2·h)；Organic compounds removal rate is up to 45%~55%；Water, soluble easily in water can be used in the spray solution
One of acylate, organic amine salt soluble easily in water, inorganic salts etc., the acylate soluble easily in water and soluble easily in water
The solute of organic amine salt at least one of glycerol, sodium benzoate, sodium oxalate, sodium acetate, sodium citrate etc. can be used, it is described
At least one of sodium sulphate, sodium carbonate etc. can be used in inorganic salts；Defoaming agent can be added when necessary.
4) circulation of shower water or spray liquid
Shower water or spray liquid by step 3), which are introduced into the spray column of step 2), to be sprayed, the spray liquid of step 2)
Or shower water is pumped into extraction equipment by circulating water pool, shower water or spray liquid extracted are introduced into the circulating water pool in step 3)
In；
In step 4), the spray liquid can be water, the aqueous solution of acylate, sodium acetate aqueous solution, sodium citrate water
Solution etc.；The extract liquor of the extraction can be selected from one in polyethylene glycol-dimethyl ether, silicone oil, paraffin, vegetable oil, diesel oil etc.
Kind；For extract liquor after stripping tower is handled, organic compounds concentration is concentrated 5~200 times.
5) circulation of extract liquor and the desorption containing volatile organic compounds, the specific method is as follows:
It is pumped into stripping tower desorption through organic solvent extracted in extraction equipment, the organic solvent after air lift returns organic
Solvent tank is spare；
In step 5), the organic compounds concentration of the stripping tower desorption is between 5000~25000mg/Nm3。
6) burning containing volatile organic compounds after desorbing, the specific method is as follows:
Enter direct combustion chambers burn containing volatile organic compounds after the desorption of the stripping tower of step 5), after burning
Exhaust gas enters and is connected with the air inlet of the spray column of step 3).
In step 6), the burner can be selected from one of boiler, catalytic burner, direct burner etc..
When the amount of the volatile organic matter containing volatile organic compounds is larger and reality in there are oil and gas boilers
When, the exhaust gas after desorption, which can also be introduced directly into boiler, to be heated.
When the amount of the volatile organic matter containing volatile organic compounds is smaller, also the extractant collection for being scattered in each point
It is middle to collect, concentrate desorption, concentrated combustion.
The present invention contains volatile organic matter using absorption-extraction-desorption-burning four steps concentrating low-concentration high humility and gives up
Volatile organic matter in gas and processing of burning.Use the aqueous solution of water-soluble organic acid salt as absorbent, it is organic with higher boiling
Solvent desorbs volatile organic matter as extractant, with air lift, thoroughly destroys volatile organic matter with burning.Extract liquor can be on the spot
Desorption can also concentrate desorption.The present invention can effectively solve containing volatile organic compounds because humidity is larger or because dedusting or cooling make
Cause humidity larger with cascade and lead to the problem of Processing tecchnics selection difficulty, can effectively reduce investment and operating cost.
Concentration of the low concentration high humility containing volatile organic compounds and processing method are suitable for low concentration, high humility, big
Air quantity, the improvement containing volatile organic compounds intermittently or serially discharged.The concentration of volatile organic matter is 10~1500mg/
Nm3, organic compounds air quantity is 1000~500000Nm3/ h can be applied to controlling for the organic compounds of water paint or oil paint
Reason；Can be applied to chemical industry, external coating, synthetic leather, rubber and plastic products, printing packaging, textile printing and dyeing, wood-based plate manufacture,
The waste gas pollution control and treatment containing volatile organic matter of the industries such as shoemaking, chemical fibre, electronic information.
Detailed description of the invention
Fig. 1 is the process flow diagram of the embodiment of the present invention.
Specific embodiment
Embodiment 1
Certain organic compounds is mainly dimethylbenzene, butanone containing part and my god water (acetate butyl), air quantity 37500Nm3, have
Machine object exhaust gas xylene concentration 315mg/Nm3, non-methane total hydrocarbons concentration 528mg/Nm3。
Organic compounds 25m exhaust tube after three-level spray column (Φ 3500 × 4500) discharges.
50~150m of recirculated water3/ h,
Exhaust tube organic compounds exit concentration dimethylbenzene 25mg/Nm3, non-methane total hydrocarbons 38mg/Nm3。
Three stage countercurrent of shower water, first order waste water COD about 1200mg/L are pumped into the extractor that extractant is vegetable oil,
Second level counter-current extraction is discharged COD < 150mg/L, enters in the circulating water pool of third level spray column through waste water extracted.
60~80 DEG C of the vegetable oil electric heating of extraction, air lift, organic compounds enter the burning directly burnt by natural gas
In device, combustion of organic matter exhaust gas enters second level spray column.
Solvent extracted enters hold-up tank storage natural cooling.
Embodiment 2
Certain organic compounds main component is my god water (acetate butyl), contains a small amount of dimethylbenzene.Air quantity 12000Nm3, organic
Object exhaust gas xylene concentration 15mg/Nm3, non-methane total hydrocarbons concentration 248mg/Nm3。
Organic compounds 15m exhaust tube after second level spray column (Φ 2500 × 3500) discharges.
15~50m of recirculated water3/h。
Exhaust tube organic compounds exit concentration dimethylbenzene 5mg/Nm3, non-methane total hydrocarbons 28mg/Nm3。
Three stage countercurrent of shower water, first order waste water COD about 1200mg/L are pumped into the extractor that extractant is vegetable oil,
Second level counter-current extraction is discharged COD < 150mg/L, enters in the circulating water pool of third level spray column through waste water extracted.
60~80 DEG C of the vegetable oil electric heating of extraction, air lift, organic compounds enter the burning directly burnt by natural gas
In device, combustion of organic matter exhaust gas enters second level spray column.
Shower water second level countercurrent spray, first order waste water COD about 2000mg/L are pumped into the extractor that extractant is vegetable oil
In, second level counter-current extraction is discharged COD < 100mg/L, enters in the circulating water pool of second level spray column through waste water extracted.
60~80 DEG C of the vegetable oil electric heating of extraction, air lift, organic compounds enter the burning directly burnt by natural gas
In device, combustion of organic matter exhaust gas enters second level spray column.
Solvent extracted enters hold-up tank storage natural cooling.
Claims (10)
1. concentration and processing method of a kind of low concentration containing volatile organic compounds, it is characterised in that the following steps are included:
1) the first segment water spray containing volatile organic compounds, the specific method is as follows:
Water circulating pump and blower are opened, is cleaned containing volatile organic compounds by first segment water spray, removes organic compounds
In dust, greasy dirt, paint, reduce the temperature of organic compounds, increase the humidity of organic compounds；Waste water enters recirculated water
Pond, circulating water pool is designed according to oil removal pool mode, totally-enclosed, and setting removable cover is used for daily cleaning, and circulating water pool sets exhaust
Pipe, exhaust pipe are connected to fan air inlet；The mass concentration containing volatile organic matter is 10~1500 mg/Nm3；
2) second segment water spray will be carried out containing volatile organic compounds by step 1), the specific method is as follows:
Second segment spray column will be introduced containing volatile organic compounds by step 1), according to organic matter in organic compounds
Property is washed with spray solution circulated sprinkling, and the recirculated water of circulating water pool derives from circulating water pool waste water, circulating water pool and extraction
Device is connected, clean water or aqueous solution after volatile organic matter is extracted in extraction equipment, for spraying；
3) third section water spray will be carried out containing volatile organic compounds by step 2, the specific method is as follows:
Third section spray column will be introduced containing volatile organic compounds by step 2, is washed with spray solution circulated sprinkling,
Circulating water pool is connected with the spray equipment of step 2, spray derives from extraction equipment cleaning solution extracted or water；
4) circulation of shower water or spray liquid
Shower water or spray liquid by step 3), which are introduced into the spray column of step 2, to be sprayed, the spray liquid of step 2 or spray
Water drenching is pumped into extraction equipment by circulating water pool, and shower water or spray liquid extracted are introduced into the circulating water pool in step 3)；
5) circulation of extract liquor and the desorption containing volatile organic compounds, the specific method is as follows:
It is pumped into stripping tower desorption through organic solvent extracted in extraction equipment, the organic solvent after air lift returns to organic solvent
Storage tank is spare；
6) burning containing volatile organic compounds after desorbing, the specific method is as follows:
Enter combustion chambers burn containing volatile organic compounds after the desorption of the stripping tower of step 5), the exhaust gas after burning enters
Through entering step 3) spray washing together in step 2 treated exhaust gas.
2. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 1), the relative humidity containing volatile organic matter is greater than 50%, and air quantity is 1000~500000 Nm3/h。
3. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 1), the cleaning is cleaned using cascade cleaning or spray column；The cascade facility keeps water recirculated water to form cascade
It is seamless；The wind speed of the spray column is 1.0~3.0 m/s；The sprinkle density is 4.5~10.5 m3/(m2﹒ h).
4. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 2, the wind speed of the second segment spray column is 0.5 ~ 2.0 m/s, and the density of spray is 4.5 ~ 10.5 m3/(m2﹒
h)。
5. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 2, the spray solution is using in water, acylate soluble easily in water, organic amine salt soluble easily in water, inorganic salts
One kind, the solute of the acylate soluble easily in water and organic amine salt soluble easily in water uses glycerol, sodium benzoate, oxalic acid
At least one of sodium, sodium acetate, sodium citrate, the inorganic salts use at least one of sodium sulphate, sodium carbonate.
6. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 3), the wind speed of the third section spray column is 0.25 ~ 1.0 m/s, and the density of spray is 8.5 ~ 15.5 m3/(m2﹒
h)。
7. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 3), the spray solution is using in water, acylate soluble easily in water, organic amine salt soluble easily in water, inorganic salts
One kind, the solute of the acylate soluble easily in water and organic amine salt soluble easily in water uses glycerol, sodium benzoate, oxalic acid
At least one of sodium, sodium acetate, sodium citrate, the inorganic salts use at least one of sodium sulphate, sodium carbonate.
8. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 4), the spray liquid is water, the aqueous solution of acylate, sodium acetate aqueous solution, sodium citrate aqueous solution；The extraction
The extract liquor taken is selected from one of polyethylene glycol dimethyl ether, silicone oil, paraffin, vegetable oil, diesel oil.
9. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 5), the organic compounds concentration of the stripping tower desorption is 5000~25000 mg/Nm3。
10. a kind of concentration and processing method of the low concentration containing volatile organic compounds as described in claim 1, it is characterised in that
In step 6), combustion chamber is selected from one of boiler, catalytic burner, direct burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710416548.8A CN107149835B (en) | 2017-06-06 | 2017-06-06 | A kind of concentration and processing method of the low concentration containing volatile organic compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710416548.8A CN107149835B (en) | 2017-06-06 | 2017-06-06 | A kind of concentration and processing method of the low concentration containing volatile organic compounds |
Publications (2)
| Publication Number | Publication Date |
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| CN107149835A CN107149835A (en) | 2017-09-12 |
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| CN109954385A (en) * | 2019-01-03 | 2019-07-02 | 四川源之蓝环保科技有限公司 | A kind of UV photodissociation exhaust gas purifying method |
| CN110917828A (en) * | 2019-11-08 | 2020-03-27 | 佛山市威仕达新材料有限公司 | PVC foaming tail gas purifying agent |
| CN110732220A (en) * | 2019-11-21 | 2020-01-31 | 佛山绿曦环境工程有限公司 | Paint spraying line waste gas adsorption concentration catalytic combustion treatment system and treatment method thereof |
| CN111135656B (en) * | 2020-01-17 | 2021-10-08 | 山东铭亿电气科技有限公司 | Workshop dust explosion-proof equipment for fire control |
| CN111482031B (en) * | 2020-06-01 | 2022-03-04 | 西安蓝深新材料科技有限公司 | System and method for recycling granulation waste gas of lithium adsorbent product |
| CN112191067A (en) * | 2020-10-20 | 2021-01-08 | 连云港连润环保科技有限公司 | Industrial waste gas treatment method |
| CN113908688A (en) * | 2021-10-18 | 2022-01-11 | 桂林南药股份有限公司 | Volatile organic compound treatment system and method |
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