CN108246064A - A kind of comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss goes out - Google Patents
A kind of comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss goes out Download PDFInfo
- Publication number
- CN108246064A CN108246064A CN201611242114.2A CN201611242114A CN108246064A CN 108246064 A CN108246064 A CN 108246064A CN 201611242114 A CN201611242114 A CN 201611242114A CN 108246064 A CN108246064 A CN 108246064A
- Authority
- CN
- China
- Prior art keywords
- exhaust gas
- vocs
- sewage farm
- gas containing
- goes out
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
-
- 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
- B01D53/04—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 with stationary adsorbents
-
- 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
- B01D53/04—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 with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
- B01D53/84—Biological processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/306—Alkali metal compounds of potassium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of comprehensive purifying methods for the exhaust gas containing VOCs that sewage farm loss goes out, and belong to the field of purification of VOCs exhaust gas.The processing method includes the following steps：The exhaust gas containing VOCs of sewage farm loss is pressed into high concentration VOCs exhaust gas and low concentration VOCs exhaust gas categorised collections；The high concentration VOCs exhaust gas initially enters absorption tower and carries out wet desulphurization, then enters back into adsorption bed and carries out adsorption cleaning, the clean gas after being adsorbed；Clean gas after the absorption is mixed, and pass through biological bed and handled with the low concentration VOCs exhaust gas.The embodiment of the present invention can pass through the VOCs exhaust gas of treated sewage Treatment stations middle and high concentration and low concentration respectively, realize the comprehensive treatment to the structures of sewage farm loss exhaust gas containing VOCs, purification discharge gas can meet related request of the national environmental protection regulation to sewage treatment plant of oil refining enterprise waste gas emission standard, have the advantages that purification efficiency is high, investment is small, operating cost is low.
Description
Technical field
The present invention relates to the field of purification of VOCs exhaust gas, exhaust gas containing VOCs that more particularly to a kind of sewage farm loss goes out
Comprehensive purifying method.
Background technology
Oil refining, each structures of Treatment of Sewage Reservoir of Chemical Plant Treatment stations loss can contain foul waste gas, this kind of sewage disposal into air
Volatile organic matter (Volatile Organic Compounds, english abbreviation containing higher concentration in the exhaust gas of field loss
VOCs), each pollutant such as hydrogen sulfide, mercaptan, thioether.Such exhaust gas not only results in the decline of regional air quality, Er Qieqi
In it is certain into branch stimulation human body respiratory system, hematological system and nervous systems, this kind of exhaust gas of Long Term Contact can be to people
Body health causes serious threat.Therefore this kind of exhaust gas is administered.
The fluctuation of concentration of exhaust emission containing VOCs generated due to sewage farm is larger and the exhaust gas of each structures loss
Middle VOCs concentration differences are larger, and suitable can be limited to the treatment technology of the VOCs exhaust gas of high concentration and low concentration simultaneously.It is existing
Have in technology, processing exhaust gas treatment method containing VOCs mainly have burning method, Production by Catalytic Combustion Process, condensation method, absorption process, absorption method,
Bioanalysis etc., but these methods are respectively provided with certain specific aim, can not well to sewage farm generate containing VOCs into
Row is administered.
Patent document CN101062463A discloses a kind of comprehensive purifying method of foul waste gas.Sewage farm aeration tank
The low concentration VOCs foul waste gas of structures loss is waited to be handled first using washing-absorbing process, purified gas that treated
Body qualified discharge；Using being catalyzed combustion tail gas desorption and regeneration adsorbent, the structures such as desorption and regeneration exhaust gas and oil separator, floation tank
The higher concentration VOCs exhaust gas mixing of loss is using desulfurization and total hydrocarbon concentration homogenizing-catalytic combustion technology processing.The technique can be with
To sewage farm each structures loss exhaust gas containing VOCs carry out comprehensive purifying, in exhaust gas pollutant (malodor components and
Volatile organic components) purification efficiency is high, but the invention flow is complicated, the larger and process operation temperatures are invested compared with high safety
Property is poor.
Patent document CN1393283A discloses a kind of purification method of exhaust gas containing combustible components.This method is using pre- place
(desulfurization, homogenizing or dedusting)-catalytic combustion process is managed, higher combustible components concentration waste gas purification will be contained, this method is to useless
Pollutant (malodor components and volatile organic components) purification efficiency in gas is high, but the technique is only suitable for processing containing more highly concentrated
The exhaust gas of combustible components is spent, when handling low concentration VOCs exhaust gas, operating cost is larger.
Patent document CN101347708A discloses a kind of processing method of sulphur-containing exhaust air with fetor escaped from storage tank.The invention is adopted
Sulphur-containing exhaust air with fetor escaped from storage tank is purified with the technique of pretreatment (desulfurization)-absorption.This method is to the net of sulfur-containing foul waste gas
It is higher to change efficiency, but when invention is applied to sewage farm dissipating stinking sulfur-containing exhaust gas, due to low concentration VOCs exhaust gas volumes
Flow is larger, it will the amount of adsorbent, which greatly increases, used in making causes one-time investment larger.Further, since resolution gas returns
It returns to adsorption tower to continue to concentrate, is likely to result in accumulation of the constituent part in adsorption tower.
Patent document CN200710031286.X discloses a kind of processing method of foul waste gas.Invention use absorption-
Low concentration, atm number, different foul gas pollutants are carried out deodorization purification by bioremediation.This method is adapted to low dense
The deodorization purified treatment of exhaust gas is spent, but when this method is applied to the high concentration VOCs exhaust gas of sewage farm loss, to exhaust gas
In TREATMENT OF VOCs effect it is limited.
Patent document CN102039078A discloses a kind of processing method of multi-component stink exhaust gas, (is inhaled using pretreatment
Receive)-microbial method combined treatment process purifies the exhaust gas containing multi-component stink, and which equally has biological law technology
On deficiency.
Invention content
In order to solve the technical issues of above-mentioned, the present invention provides a kind of the comprehensive of the exhaust gas containing VOCs that sewage farm loss goes out
Close purification method, which is capable of the VOCs exhaust gas of the loss of treated sewage Treatment stations goes out respectively high concentration and low concentration,
There is purification efficiency is high, investment is small, operating cost is low etc..
Specifically, including following technical solution：
A kind of comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss goes out, the treating method comprises following step
Suddenly：
The exhaust gas containing VOCs of sewage farm loss is pressed into high concentration VOCs exhaust gas and low concentration VOCs exhaust gas categorised collections；
The high concentration VOCs exhaust gas initially enters absorption tower and carries out wet desulphurization, then enters back into adsorption bed and is inhaled
Attached purification, the clean gas after being adsorbed；
Clean gas after the absorption is mixed, and pass through at biological bed with the low concentration VOCs exhaust gas
Reason.
Further, after the absorption of the adsorption bed reaches saturation, using water vapour in the adsorption bed
Adsorbent desorbed to obtain mixed vapour；The mixed vapour after desorption enters condenser heat exchange cooling, forms condensation
Liquid and fixed gas, and the fixed gas is mixed, and lead to clean gas, the low concentration VOCs exhaust gas after the absorption
The biological bed is crossed to be handled.
Further, the condensate liquid enters layering slot layering, obtains organic solvent not soluble in water, described not soluble in water
Organic solvent be discharged into sewage disposal field control tank or oil separator.
Preferably, the adsorption bed includes the first absorption casing and the second absorption casing, and first absorption casing
The handover operation that can be adsorbed and desorbed with second absorption casing.
Preferably, the processing of the biological bed include zinc cation, bio-trickling and biofiltration any one or
The combination of two kinds of biological treatment sections.
Preferably, the desulfurization absorbing liquid for carrying out wet desulphurization is provided in the absorption tower；The desulfurization absorbing liquid
For alkaline solution, the alkaline solution is sodium hydroxide (NaOH) aqueous solution, potassium hydroxide (KOH) aqueous solution, sodium carbonate
(Na2CO3) aqueous solution, potassium carbonate (K2CO3) aqueous solution or ammonium hydroxide.
Preferably, the adsorbent on the adsorption bed (2) is active carbon particle and/or activated carbon fibre.
Preferably, the high concentration VOCs source exhaust gas collect in sewage farm, oil removal and Treatment of Sludge structures,
It is adjusted between tank, oil separator, floation tank, slop tank, sludge concentration tank, the dehydration of three mud including sewage；The low concentration VOCs exhaust gas
From sewage farm biochemical treatment structures, including biochemistry pool, aeration tank, a heavy pond.
Preferably, in the high concentration VOCs exhaust gas mean concentration of VOCs in 300~6000mg/m3, the low concentration
The mean concentration of VOCs is not more than 200mg/m in VOCs exhaust gas3。
Preferably, it is 100-200 DEG C for the temperature of the water vapour of desorption.
The advantageous effect of technical solution provided in an embodiment of the present invention：Provide that a kind of sewage farm loss goes out contains
The comprehensive purifying method of VOCs exhaust gas, the foul waste gas containing VOCs particularly suitable for the loss of oil refining enterprise sewage farm it is net
Change.Specifically, the categorised collection of exhaust gas containing VOCs of Wastewater Treatment Field in Refinery loss is obtained first high concentration VOCs exhaust gas and
High concentration VOCs exhaust gas is carried out wet desulphurization, then carries out adsorption cleaning, the clean gas after absorption by low concentration VOCs exhaust gas
It is mixed with low concentration VOCs exhaust gas, and passes through malodor components and VOCs groups in Biochemical method technique advanced treating exhaust gas
Point.The embodiment of the present invention can be realized by the VOCs exhaust gas of treated sewage Treatment stations middle and high concentration and low concentration respectively to dirt
The comprehensive treatment of the structures for the exhaust gas containing VOCs that Large Water Treatment Field loss goes out, purification discharge gas can meet national environmental protection regulation pair
The related request of sewage treatment plant of oil refining enterprise waste gas emission standard, it is excellent to have that purification efficiency is high, investment is small, operating cost is low
Point.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the work of the exhaust gas of VOCs containing high concentration that a kind of treated sewage Treatment stations loss provided in an embodiment of the present invention goes out
Skill flow diagram；
Fig. 2 is the work of the exhaust gas of VOCs containing low concentration that a kind of treated sewage Treatment stations loss provided in an embodiment of the present invention goes out
Skill flow diagram.
Reference numeral in figure represents respectively：
1st, absorption tower；
2nd, adsorption bed；21st, the first absorption casing；22nd, the second absorption casing；
3rd, biological bed；
4th, condenser；
5th, it is layered slot；
6th, air-introduced machine.
Specific embodiment
To make technical scheme of the present invention and advantage clearer, embodiment of the present invention is made below in conjunction with attached drawing into
One step it is described in detail.Unless otherwise defined, all technical terms used in the embodiment of the present invention are respectively provided with and art technology
The normally understood identical meaning of personnel.
The embodiment of the present invention provides a kind of comprehensive purifying method of the exhaust gas containing VOCs that sewage farm loss goes out, the processing
Method includes the following steps：
The exhaust gas containing VOCs of sewage farm loss is pressed into high concentration VOCs exhaust gas and low concentration VOCs exhaust gas categorised collections；
High concentration VOCs exhaust gas initially enters absorption tower 1 and carries out wet desulphurization, then enters back into adsorption bed 2 and is adsorbed
Purification, the clean gas after being adsorbed；
Clean gas after absorption is mixed, and carried out in processing exhaust gas by biological bed 3 with low concentration VOCs exhaust gas
Malodor components and VOCs components.
The embodiment of the present invention uses Biochemical method technique to the processing of low concentration VOCs exhaust gas, to high concentration VOCs exhaust gas
Processing use wet desulphurization-absorption-Biochemical method technique.Before being processed, first to sewage farm loss
The categorised collection of exhaust gas containing VOCs (high concentration VOCs exhaust gas and low concentration VOCs exhaust gas) can specifically come according to the source difference of exhaust gas
Categorised collection is carried out to it, for example, high concentration VOCs exhaust gas is mainly derived from sewage farm collection, oil removal and Treatment of Sludge
Structures, including between sewage adjusting tank (pond), oil separator, floation tank, slop tank, sludge concentration tank, the dehydration of three mud etc., ventilation is secondary
Number preferably selects 1 time.Low concentration VOCs exhaust gas is mainly derived from sewage farm biochemical treatment structures, including biochemistry pool (A/O
Pond), aeration tank, a heavy pond etc., rate of ventilation preferably selects 4 times (aeration tank calculates tolerance according to aeration quantity).Wherein, high concentration
The mean concentration of VOCs is in 300~6000mg/m in VOCs exhaust gas3, the mean concentration of VOCs is not in low concentration VOCs exhaust gas
More than 200mg/m3.When low VOCs concentration structures rate of ventilation selection 4 times, (it is more than 300mg/ when VOCs concentration is still higher
m3), can suitably mend fresh air reduces VOCs concentration, and exhaust gas concentration is allow to purify qualified discharge by the degradation of biology.
The work of the comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss provided in an embodiment of the present invention goes out is former
It manages and is：As depicted in figs. 1 and 2, high concentration VOCs exhaust gas is subjected to wet desulphurization, removes organic sulfur, inorganic sulfur etc. in exhaust gas
Sulfide, wet desulphurization use desulfurization absorbing liquid.High concentration VOCs exhaust gas after pretreatment (after wet desulphurization) enters suction
Attached bed 2 using the volatile organic matter in the adsorbent removing exhaust gas in adsorption bed 2, carries out adsorption cleaning, after absorption
Clean gas is mixed with low concentration VOCs exhaust gas, by the malodor components in Biochemical method technique advanced treating exhaust gas and
VOCs components.The embodiment of the present invention can be real by the VOCs exhaust gas of treated sewage Treatment stations middle and high concentration and low concentration respectively
The comprehensive treatment of the structures of the exhaust gas containing VOCs now gone out to sewage farm loss, purification discharge gas can meet national environmental protection
Regulation has purification efficiency height, invests small, operating cost to the related request of sewage treatment plant of oil refining enterprise waste gas emission standard
The advantages of low, the purification of the foul waste gas containing VOCs particularly suitable for the loss of oil refining enterprise sewage farm.
In the processing method of the exhaust gas containing VOCs gone out in above-mentioned sewage farm loss, in order to reuse absorption
Bed 2, the processing method further include：After the absorption of adsorption bed 2 reaches saturation, using water vapour in adsorption bed 2
Adsorbent desorbed to obtain mixed vapour；Mixed vapour after desorption enters the heat exchange cooling of condenser 4, cold with condenser 4
But mixed vapour (cooling medium selects recirculated water or frost water), the steam formed after condensate liquid and desorption passes through condenser 4
Fixed gas afterwards.Further, then by fixed gas with clean gas, the low concentration VOCs exhaust gas after absorption it mixes, and pass through life
Object bed 3 carries out malodor components and VOCs components in processing exhaust gas.It so on the one hand can be to being directly entered biological bed 3
Low concentration VOCs exhaust gas play a diluting effect, low concentration VOCs exhaust gas is made to be more advantageous to dropping by Biochemical method technique
Solution, fixed gas of the steam after condenser 4 after on the other hand desorbing are mixed into Biochemical method technique advanced treating, and
The non-adsorption bed 2 that is sent to continues to concentrate, in this way can be to avoid the accumulation of constituent part.
It is layered in addition, condensate liquid is made to enter layering slot 5, forms organic solvent not soluble in water, this not soluble in water is had
Solvent is directly discharged into the structures such as sewage disposal field control tank or oil separator.Further, the desorption of adsorption bed 2 is finished
Afterwards, air can also be used or purify wind, non-purification wind blows steam remaining when being desorbed on the adsorbent in adsorption bed 2
Go out, preferably to carry out adsorption cleaning again.
In the processing method of the exhaust gas containing VOCs gone out in above-mentioned sewage farm loss, in order in adsorption bed 2
In be carried out at the same time absorption and desorption operations, to improve exhaust treatment efficiency, can set adsorption bed 2 include at least two adsorption boxes
Body, in a kind of possible embodiment, setting adsorption bed 2 includes the first absorption casing 21 and the second absorption casing 22, absorption
When, the high concentration VOCs exhaust gas after pretreatment (after wet desulphurization) is made to be inhaled into the first absorption casing 21 by control valve
Attached purification run, using the volatile organic matter in the adsorbent removing exhaust gas in the first absorption casing 21, when the first adsorption box
After adsorbent adsorption saturation in body 21, switch valve makes pretreated high concentration VOCs exhaust gas enter the second absorption casing 22
Adsorption cleaning operation is carried out, while (thermal desorption regeneration) is desorbed to the first absorption casing 21.Wherein, water vapour heat can be used
Regeneration is desorbed, that is, is passed through supersaturation water steam and the first absorption casing 21 is heated, the VOCs for making to adsorb is by stripping
It releases, and adsorption bed 2 is left together with water vapour formation mixed vapour, into condenser 4.
And after adsorbent adsorption saturation in the second absorption casing 22, changeable valve carries out the second absorption casing 22
Desorption, and the first absorption casing 21 is made to carry out adsorption cleaning operation, the first absorption casing 21 and the second absorption casing 22 are handed over successively
For the handover operation for being adsorbed and being desorbed, to save material, and exhaust treatment efficiency is improved.
In the processing method of the exhaust gas containing VOCs gone out in above-mentioned sewage farm loss, the processing of biological bed 3 can adopt
It, specifically can root with the combination of any one or two kinds of biological treatment sections of zinc cation, bio-trickling and biofiltration
It is determined according to the parameters such as VOCs concentration, composition in exhaust gas.Independent filler (plastics, pottery may be selected in biologic packing material used in biological bed 3
Porcelain or metal), or mixed fillers.Biological bacterium solution in biological bed 3 can should simultaneously degrade the stench in exhaust gas
Component and VOCs components, for the bacterial activity temperature at 15~45 DEG C, suitable pH value is 4~10.After exhaust gas, desorption after cleaning
Fixed gas of the steam after condenser 4 be mixed into biological bed 3 with low concentration VOCs exhaust gas, pass through biological bed 3
Residence time is generally 10s~120s, preferably 20s~60s, specifically can be true according to the parameters such as VOCs concentration, composition in exhaust gas
It is fixed.
It is wet for carrying out in absorption tower 1 in the processing method of the exhaust gas containing VOCs gone out in above-mentioned sewage farm loss
The desulfurization absorbing liquid of method desulfurization is alkaline absorbent, can generally use sodium hydroxide (NaOH) aqueous solution, potassium hydroxide (KOH)
Aqueous solution, sodium carbonate (Na2CO3) aqueous solution, potassium carbonate (K2CO3) aqueous solution or ammonium hydroxide etc., concentration is generally 1%~30%
(wt), pH value general control is not less than 7.2, and alkaline absorbent can be recycled during operation, when pH value is down to 7.2~7.5,
PH is adjusted by discharging any waste liquor or the fresh lye of supplement.Alkali cleaning temperature is normally controlled in 20~50 DEG C, alkaline absorbent
Typical concentrations are the sodium hydroxide solution of 10%~15% (wt).
It is used to carry out in the processing method of the exhaust gas containing VOCs gone out in above-mentioned sewage farm loss, in adsorption bed 2
The adsorbent of adsorption cleaning is any one or two kinds of mixtures with arbitrary proportion in active carbon particle, activated carbon fibre.
Further, exhaust gas is generally 500~10000h by the volume space velocity of adsorption bed-1, preferably 1000~8000h-1。
In the processing method of the exhaust gas containing VOCs gone out in above-mentioned sewage farm loss, for the temperature of the water vapour of desorption
Degree temperature range is generally 100-250 DEG C, preferably 100-200 DEG C.
The scheme and effect of method are further illustrated the present invention with reference to embodiment：
The present embodiment is contained using wet desulphurization-absorption-Liang Duan Biochemical methods oil refining enterprise sewage farm loss
VOCs exhaust gas.High concentration VOCs source exhaust gas is in sewage farm collection, oil removal and Treatment of Sludge structures, including sewage tune
Between section tank (pond), oil separator, floation tank, slop tank, sludge concentration tank, the dehydration of three mud etc., exhaust gas flow 5000Nm3/ h, contains
H2S 100mg/m3Left and right, non-methane total hydrocarbons 2500mg/m3Left and right.Low concentration VOCs derives from sewage farm biochemical treatment structure
Object is built, including biochemistry pool (A/O ponds), aeration tank, a heavy pond etc., exhaust gas flow 20000Nm3/ h, containing H2S 40mg/m3Left and right,
Non-methane total hydrocarbons 150mg/m3Left and right.
High concentration VOCs exhaust gas initially enters the H in absorption tower removing exhaust gas2S, desulfurization absorbing liquid are sodium hydroxide
(NaOH) aqueous solution, a concentration of 15% (wt), pH value control are not less than 7.5, and alkaline absorbent recycles during operation, works as pH
When value is down to 7.5, pH is adjusted by discharging any waste liquor or the fresh lye of supplement.Alkali liquid temperature is controlled at 30 DEG C.
High VOCs concentration waste gas after removing sulfide enters adsorption bed, and adsorbent selects commercially available common active carbon fibre
Dimension, specific surface area 1300m2/ g, hole hold 0.8ml/g, average pore size 2.0nm.Total volume air speed is 1200h-1, absorption 12h is again
It is raw.All kinds of organic components in high VOCs concentration waste gas are fully adsorbed by adsorbent.
Steam after low VOCs concentration waste gas and purified high VOCs concentration waste gas and desorption by it is condensed not
Solidifying gas is mixed into biological treatment.Biological treatment uses two sections of biological law technologies of bio-trickling-biofiltration.Two
The bacterium solution of commercially available can degrade malodor components and VOCs components is sprayed in section bioanalysis.Wherein bio-trickling section is filled out using biology
Expect the plastic filler for polyhedron empty ball, residence time 30s；Biofiltration section is organic and nothing using commercially available biologic packing material
Machine compounded mix, residence time 30s.Two sections of bioanalysis bacterium solution temperature are 30 DEG C.
The exhaust gas containing VOCs that sewage farm loss goes out is after above-mentioned process, exit gas non-methane total hydrocarbons concentration
Less than 70mg/m3, concentration of hydrogen sulfide examines and do not measure substantially.Purification discharge gas can meet national environmental protection regulation to oil refining enterprise's dirt
The related request of Large Water Treatment Field waste gas emission standard.
The above is for only for ease of it will be understood by those skilled in the art that technical scheme of the present invention, not limiting
The present invention.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection domain of invention.
Claims (10)
1. a kind of comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss goes out, it is characterised in that：The processing method
Include the following steps：
The exhaust gas containing VOCs of sewage farm loss is pressed into high concentration VOCs exhaust gas and low concentration VOCs exhaust gas categorised collections；
The high concentration VOCs exhaust gas initially enters absorption tower (1) and carries out wet desulphurization, then enters back into adsorption bed (2) progress
Adsorption cleaning, the clean gas after being adsorbed；
Clean gas after the absorption with the low concentration VOCs exhaust gas is mixed, and passes through biological bed (3) and is handled.
2. the comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss according to claim 1 goes out, feature exist
In,
After the absorption of the adsorption bed (2) reaches saturation, using water vapour to the adsorbent in the adsorption bed (2)
It is desorbed to obtain mixed vapour；The mixed vapour after desorption enters condenser (4) heat exchange cooling, forms condensate liquid and not
Solidifying gas；
And the fixed gas with clean gas, the low concentration VOCs exhaust gas after the absorption is mixed, and is passed through described
Biological bed (3) is handled.
3. the comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss according to claim 2 goes out, feature exist
In the condensate liquid enters layering slot (5) and is layered, and obtains organic solvent not soluble in water.
4. the comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss according to claim 2 goes out, feature exist
In the adsorption bed (2) includes the first absorption casing (21) and the second absorption casing (22), and first absorption casing
(21) and second absorption casing (22) handover operation that can be adsorbed and desorbed.
5. according to the comprehensive purifying method for the exhaust gas containing VOCs that claim 1-4 any one of them sewage farm loss goes out,
It is characterized in that, it is described biology bed (3) processing include zinc cation, bio-trickling and biofiltration any one or two
The combination of kind biological treatment section.
6. according to the comprehensive purifying method for the exhaust gas containing VOCs that claim 1-4 any one of them sewage farm loss goes out,
It is characterized in that, the desulfurization absorbing liquid for carrying out wet desulphurization is provided in the absorption tower (1)；
The desulfurization absorbing liquid is alkaline solution, and the alkaline solution is sodium hydroxide (NaOH) aqueous solution, potassium hydroxide (KOH)
Aqueous solution, sodium carbonate (Na2CO3) aqueous solution, potassium carbonate (K2CO3) aqueous solution or ammonium hydroxide.
7. according to the comprehensive purifying method for the exhaust gas containing VOCs that claim 2-4 any one of them sewage farm loss goes out,
It is characterized in that, the adsorbent on the adsorption bed (2) is active carbon particle and/or activated carbon fibre.
8. according to the comprehensive purifying method for the exhaust gas containing VOCs that claim 1-4 any one of them sewage farm loss goes out,
It is characterized in that, the high concentration VOCs source exhaust gas is collected in sewage farm, oil removal and Treatment of Sludge structures, including
Sewage is adjusted between tank, oil separator, floation tank, slop tank, sludge concentration tank, the dehydration of three mud；The low concentration VOCs source exhaust gas
In sewage farm biochemical treatment structures, including biochemistry pool, aeration tank, a heavy pond.
9. according to the comprehensive purifying method for the exhaust gas containing VOCs that claim 1-4 any one of them sewage farm loss goes out,
It is characterized in that, the mean concentration of VOCs is in 300~6000mg/m in the high concentration VOCs exhaust gas3, the low concentration VOCs
The mean concentration of VOCs is not more than 200mg/m in exhaust gas3。
10. according to the comprehensive purifying method for the exhaust gas containing VOCs that claim 2-4 any one of them sewage farm loss goes out,
It is characterized in that, the temperature for the water vapour of desorption is 100-200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611242114.2A CN108246064A (en) | 2016-12-29 | 2016-12-29 | A kind of comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss goes out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611242114.2A CN108246064A (en) | 2016-12-29 | 2016-12-29 | A kind of comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss goes out |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108246064A true CN108246064A (en) | 2018-07-06 |
Family
ID=62720572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611242114.2A Pending CN108246064A (en) | 2016-12-29 | 2016-12-29 | A kind of comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss goes out |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108246064A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479028A (en) * | 2019-08-28 | 2019-11-22 | 中天科技精密材料有限公司 | A kind of oil vapor treatment system |
| CN111282433A (en) * | 2020-03-25 | 2020-06-16 | 杭州楚环科技股份有限公司 | VOCs waste gas treatment method and VOCs waste gas treatment system |
| CN114917715A (en) * | 2022-05-19 | 2022-08-19 | 合肥国风先进基础材料科技有限公司 | Method for recovering DMAc solvent in waste gas of polyimide film production line |
| CN116585838A (en) * | 2023-06-26 | 2023-08-15 | 艾易西(中国)环保科技有限公司 | VOCs waste gas treatment method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101062463A (en) * | 2006-04-25 | 2007-10-31 | 中国石油化工股份有限公司 | Combined purification method for effluvial exhaust air |
| CN101347708A (en) * | 2007-07-18 | 2009-01-21 | 中国石油化工股份有限公司 | Method for processing sulphur-containing exhaust air with fetor escaped from storage tank |
| CN102908849A (en) * | 2011-08-01 | 2013-02-06 | 中国石油化工股份有限公司 | Treatment method for waste gas discharged from sewage farm |
| CN205109392U (en) * | 2015-11-16 | 2016-03-30 | 北京沃太斯环保科技发展有限公司 | Absorption process and biological method combined effect handle device of VOC waste gas |
| CN205672782U (en) * | 2016-04-22 | 2016-11-09 | 北京沃太斯环保科技发展有限公司 | A kind of absorption, condensation and bioanalysis synergy process the device of waste gas |
-
2016
- 2016-12-29 CN CN201611242114.2A patent/CN108246064A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101062463A (en) * | 2006-04-25 | 2007-10-31 | 中国石油化工股份有限公司 | Combined purification method for effluvial exhaust air |
| CN101347708A (en) * | 2007-07-18 | 2009-01-21 | 中国石油化工股份有限公司 | Method for processing sulphur-containing exhaust air with fetor escaped from storage tank |
| CN102908849A (en) * | 2011-08-01 | 2013-02-06 | 中国石油化工股份有限公司 | Treatment method for waste gas discharged from sewage farm |
| CN205109392U (en) * | 2015-11-16 | 2016-03-30 | 北京沃太斯环保科技发展有限公司 | Absorption process and biological method combined effect handle device of VOC waste gas |
| CN205672782U (en) * | 2016-04-22 | 2016-11-09 | 北京沃太斯环保科技发展有限公司 | A kind of absorption, condensation and bioanalysis synergy process the device of waste gas |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110479028A (en) * | 2019-08-28 | 2019-11-22 | 中天科技精密材料有限公司 | A kind of oil vapor treatment system |
| CN111282433A (en) * | 2020-03-25 | 2020-06-16 | 杭州楚环科技股份有限公司 | VOCs waste gas treatment method and VOCs waste gas treatment system |
| CN114917715A (en) * | 2022-05-19 | 2022-08-19 | 合肥国风先进基础材料科技有限公司 | Method for recovering DMAc solvent in waste gas of polyimide film production line |
| CN114917715B (en) * | 2022-05-19 | 2024-03-19 | 合肥国风先进基础材料科技有限公司 | Method for recovering DMAc solvent in waste gas of polyimide film production line |
| CN116585838A (en) * | 2023-06-26 | 2023-08-15 | 艾易西(中国)环保科技有限公司 | VOCs waste gas treatment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Golmakani et al. | Advances, challenges, and perspectives of biogas cleaning, upgrading, and utilisation | |
| CN108246064A (en) | A kind of comprehensive purifying method for the exhaust gas containing VOCs that sewage farm loss goes out | |
| KR101207532B1 (en) | Apparatus for performing drying and removing impurities process of bio-methane at high purity bio-methane purification system | |
| CN102068890A (en) | Method and device for treating complex industrial organic waste gas | |
| CN1951541A (en) | Process for purifying sulfur-containing foul waste gas | |
| CN110711485A (en) | Waste gas purification device for sewage treatment station of sterile raw material medicine production line | |
| CN102049181A (en) | Purification method of sulfur-containing organic waste gas | |
| CN107537293A (en) | A kind of closed cycle bacterial desulfurization and the method for reclaiming elemental sulfur | |
| Rabbani et al. | Recovery of sulphur from contaminated air in wastewater treatment plants by biofiltration: a critical review | |
| CN103861426B (en) | A kind of flue gas desulfurization and dedusting also reclaims the method for sodium sulfite | |
| CN106318500A (en) | Biological purifying process of unconventional gas | |
| CN208449008U (en) | A kind of combined type organic waste-gas purification and recyclable device | |
| CN109078479A (en) | A kind of compound bio method processing sewage plant exhaust device and waste gas processing method | |
| KR200205816Y1 (en) | Apparatus for removing organic odor | |
| CN100496702C (en) | Absorbent for purifying sulfur-containing foul waste gas and preparation method thereof | |
| CN101239272A (en) | Processing method of sewage storage tank discharging gas | |
| CN104772002A (en) | Biogas purifier | |
| CN108246061A (en) | The processing method for the exhaust gas containing VOCs that a kind of loss of sewage lifting pond goes out | |
| CN111167288A (en) | Treatment process and treatment system for high-concentration stink waste gas | |
| CN101337149B (en) | Casting old-sand regeneration tail-gas processing method | |
| CN206823520U (en) | A kind of water smoke separates deodorization demisting integration waste gas purification system device | |
| CN108114570B (en) | methods for treating plants containing CS2And H2S mixed pollutant waste gas method | |
| CN215233246U (en) | Oil sludge treatment industry waste gas treatment equipment | |
| CN1657141A (en) | Method for eliminating stink odor from air in sewage treating work | |
| CN206215025U (en) | Desulfurizer containing diversified forms sulfide gaseous mixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180706 |