CN106237820A - A kind of process technique containing VOCs industrial waste gas and system - Google Patents
A kind of process technique containing VOCs industrial waste gas and system Download PDFInfo
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- CN106237820A CN106237820A CN201610908242.XA CN201610908242A CN106237820A CN 106237820 A CN106237820 A CN 106237820A CN 201610908242 A CN201610908242 A CN 201610908242A CN 106237820 A CN106237820 A CN 106237820A
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- waste gas
- absorbent
- aerofluxus
- industrial waste
- washing column
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—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
- B01D53/38—Removing components of undefined structure
- B01D53/44—Organic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/205—Other organic compounds not covered by B01D2252/00 - B01D2252/20494
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a kind of process technique containing VOCs industrial waste gas and system, absorbent outlet is set bottom absorbent circulating slot, top sets mixture inlet and aerofluxus washing column, absorbent outlet connects the nozzle on aerofluxus washer by absorbent conveyance conduit, and absorbent conveyance conduit is sequentially provided with absorbent circulating pump and absorbent cooler；Absorbent conveyance conduit after absorbent cooler additionally connects the top absorbent entrance of aerofluxus washing column；The exhaust gas entrance of aerofluxus washer connects industrial waste gas pipeline, and the mixture outlet of aerofluxus washer connects the mixture inlet of absorbent circulating slot；The top waste gas outlet of aerofluxus washing column connects the gas flare of burned waste gas furnace bottom by waste gas air-introduced machine, and waste gas combustion furnace is provided with combustion air inlet, connects outside atmosphere by air blower；Waste gas combustion furnace top sets chimney.The present invention uses absorption effectively to remove the VOCs in industrial waste gas with burning the method combined, and its technique is simple, small investment.
Description
Technical field
The present invention relates to industrial waste gas processing technology field, particularly relate to a kind of process technique containing VOCs industrial waste gas and
System.
Background technology
VOCs (volatile organic compounds) i.e. volatile organic matter, is the general designation of a class chemical substance.
VOCs is harmful material, and the harm to human body mainly has two aspects: one is that its harmful components directly affect human body
Health, it two is that VOCs can form PM 2.5 precursor, thus remote-effects health.
VOCs forms complexity, mainly includes alkane, alkene, aromatic hydrocarbon, halogenated hydrocarbons, oxygen-containing hydrocarbon, nitrogen hydrocarbon, sulfur hydrocarbon, low boiling
Polycyclic aromatic hydrocarbon etc..The most common VOCs kind has toluene, dimethylbenzene, o-dichlorobenzene, ethylbenzene, styrene, formaldehyde, acetaldehyde etc.
Deng.Industrial discharge is main VOCs pollution source, have discharge concentrate, discharge intensity is big, concentration is high, the spy of complicated components
Point.
The most industrial administering method to VOCs mainly has absorption method, absorption process, condensation method, membrane separation process, biological fall
Solution and burning method etc., be briefly discussed below:
1) absorption method: be to use adsorbent, by the contamination build-up in exhaust-gas mixture or condensing on surface, reaches to separate
Remove purpose.The method technique is simple, and purification efficiency is high, a small investment, and operating cost is low, but SR is relatively big, easily
Blocking, and regeneration efficiency is the highest, it is adaptable to the purification of the VOCs of middle low concentration.
2) absorption process: i.e. washing method, is to utilize absorbent to select to absorb each blending ingredients or certain component in waste gas, reaches
To the purpose purifying waste gas.This method equipment is simple, and easy to maintenance, SR is little, and energy consumption is low, but purification efficiency is the highest, processes
After tail gas be extremely difficult to Standard.
3) condensation method: be that waste gas is cooled to below the dew point of VOCs composition, reclaimed after being allowed to be condensed into liquid
Method.Be used for high concentration, one-component has the process of VOCs of recovery value.This method can effective one-tenth in efficient recovery waste gas
Point, shortcoming is that processing cost is higher, technical sophistication.
4) membrane separation process: use the membrance separation VOCs material of synthetic.It is applicable to the process of high concentration VOCs.This method can have
Effect reclaims the effective ingredient in waste gas, and organic efficiency is high, and shortcoming is that cost is high, can cause fouling membrane, and additionally the stability of film is also
Difference.
5) biological degradation method: utilize microorganism that the pollutant in waste gas are carried out digestion and metabolism, pollutant are converted into nothing
Water, carbon dioxide and other inorganic salts of evil.Method energy consumption is low, expense is low for this, and shortcoming is that floor space is big, and range has
Limit.
6) burning method: in waste gas, contained Organic substance is combustible species, and waste gas is introduced directly into special by burning method exactly
Heating furnace burn.This method is burned thoroughly for low concentration gas, and shortcoming is that process energy consumption is of a relatively high.
From above com-parison and analysis it can be seen that existing various VOCs administering method are respectively arranged with advantage, also there is its deficiency
Place.Along with the enforcement of new environmental law, more and more higher to environmental requirement, a kind of technique of invention is simple, invest low, governance efficiency is high,
It is the most significant that adaptable industry VOCs administers new method.
Summary of the invention
The invention provides a kind of process technique containing VOCs industrial waste gas and system, use absorption to combine with burning
Method effectively removes the VOCs in industrial waste gas, is particularly well-suited to the industrial gas emission system of middle and small scale；Its technique is simple,
Small investment, in industrial waste gas, VOCs composition removal efficiency is high, strong adaptability.
In order to achieve the above object, the present invention realizes by the following technical solutions:
A kind of process technique containing VOCs industrial waste gas, comprises the steps:
1) by absorbent circulating pump, the absorbent in absorbent circulating slot is extracted out, be cooled to 30 through absorbent cooler
～after 80 DEG C, send in the nozzle of aerofluxus washer, the absorbent pressure entering aerofluxus washer is 0.4～1.0Mpa；Aerofluxus
In washer, the pressure of exhaust gas entrance is-1～-5kPa, utilizes this negative pressure will contain VOCs industrial waste gas and sucks aerofluxus washer, makes
The industrial waste gas containing VOCs is sufficiently mixed with absorbent, and physical-chemical reaction occurs；
2) mixture containing VOCs industrial waste gas and absorbent enters in absorbent circulating slot, absorbs the absorption of VOCs
Agent is collected Posterior circle by absorbent circulating slot and is utilized；Incoagulable gas enters back into aerofluxus washing column；
3) in aerofluxus washing column, absorbent sprays down over from aerofluxus washing column, and sprinkler discharge density is 2～20m3/m2·
h；Incoagulable gas enters from the bottom of aerofluxus washing column tower, with absorbent counter current contacting during up, and reacted absorption
Agent also returns to absorbent circulating slot；Absorb through aerofluxus washer and aerofluxus washing column two step, big containing in VOCs industrial waste gas
Part VOCs composition is absorbed by absorbent；
4) tail gas after aerofluxus washing column washs is pumped to waste gas combustion furnace by waste gas air-introduced machine, and allocates combustion air into
Burning, incineration temperature 800～1200 DEG C in stove, pressure in the burner hearth-100～-200Pa, industrial waste gas is at waste gas combustion furnace
The interior burning time of staying is 1～3s；
5), after the clean tail gas after waste gas combustion furnace burns is cooled to below 150 DEG C, smoke stack emission is passed through.
Described absorbent uses organic solvent, washing oil or diesel oil.
The type of cooling of the described clean tail gas of burned waste gas furnace rear determines according to treatment scale, handled Industry Waste tolerance≤
3000m3During/h, use air cooling way；Handled Industry Waste tolerance ＞ 10000m3During/h, use heat exchange in air preheater
Mode reclaims heat.
For realizing a kind of processing system containing VOCs industrial waste gas of described technique, including aerofluxus washer, absorbent
Circulating slot, aerofluxus washing column, absorbent cooler and waste gas combustion furnace；Absorbent outlet is set bottom described absorbent circulating slot,
Top sets mixture inlet and aerofluxus washing column, and absorbent outlet connects the spray on aerofluxus washer by absorbent conveyance conduit
Mouth, absorbent conveyance conduit is sequentially provided with absorbent circulating pump and absorbent cooler；Absorbent after absorbent cooler
Conveyance conduit additionally connects the top absorbent entrance of aerofluxus washing column；The exhaust gas entrance of aerofluxus washer connects Industry Waste trachea
Road, the mixture outlet of aerofluxus washer connects the mixture inlet of absorbent circulating slot；The top waste gas of aerofluxus washing column goes out
Mouth connects the gas flare of burned waste gas furnace bottom by waste gas air-introduced machine, and waste gas combustion furnace is provided with combustion air inlet,
Outside atmosphere is connected by air blower；Waste gas combustion furnace top sets chimney.
Described aerofluxus washer is injection type Venturi scrubber, has injection mixed function.
Described aerofluxus washing column uses high-efficiency packing tower.
Described waste gas combustion furnace uses vertical incinerator.
Described gas flare is spreading efficient type burner, uses two-stage ignition mode, and arranges altar lamp.
Described gas flare is provided with flame detector, propeller and lighter.
Described absorbent circulating slot is integrated with aerofluxus washing column, and aerofluxus washing column is arranged on absorbent circulating slot
Top；Waste gas combustion furnace is also integrated with chimney, and chimney is arranged on the top of waste gas combustion furnace.
Compared with prior art, the invention has the beneficial effects as follows:
1) use and absorb and burn the Technology that combines, industrial waste gas purifying efficiency height, VOCs removal efficiency up to
More than 99.9%；
2) set aerofluxus cleaning system in burned waste gas stokehold, first industrial waste gas is carried out washing absorption, reduce incinerator
Load；
3) arrangement of waste gas combustion furnace is vertical, and simple in construction is small and exquisite, and chimney is seated on incinerator, floor space
Little；
4) waste gas combustion furnace burner hearth incineration temperature maintains about 800～1200 DEG C, makes nuisance in waste gas reach in stove
To complete combustion decomposition, do not produce secondary pollution；
5) gas flare uses two-stage ignition mode, i.e. first lights altar lamp during igniting, then is lighted by altar lamp useless
Gas；The combustion of altar lamp length can be when the composition of industrial waste gas be with flowed fluctuation, it is ensured that entering burner hearth can the most sufficiently fire
Burn, safe and reliable；
6) for the system that industrial waste gas treating capacity is fewer, in order to simplify operation, flue gas waste heat recovery can not be set, directly
Use air-cooled；Both having simplified operation, floor space is the least, is particularly suitable for the transformation of original exhaust treatment system；
7) when system is run, waste gas combustion furnace is in negative pressure state all the time, it is to avoid harmful gas escapes, protection ring effectively
Border.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of process technique containing VOCs industrial waste gas of the present invention.
In figure: 1. gas flare 2. waste gas combustion furnace 3. chimney 4. air blower 5. waste gas air-introduced machine 6. aerofluxus
Washing column 7. aerofluxus washer 8. absorbent circulating slot 9. absorbent circulating pump 10. absorbent cooler 11. fire defector
Device 12. propeller 13. lighter
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further:
As it is shown in figure 1, a kind of process technique containing VOCs industrial waste gas of the present invention, comprise the steps:
1) by absorbent circulating pump 9, the absorbent in absorbent circulating slot 8 is extracted out, cool down through absorbent cooler 10
After 30～80 DEG C, send into aerofluxus washer 7 nozzle in, enter aerofluxus washer 7 absorbent pressure be 0.4～
1.0Mpa；In aerofluxus washer 7, the pressure of exhaust gas entrance is-1～-5kPa, utilizes this negative pressure will contain VOCs industrial waste gas and sucks
Aerofluxus washer 7, makes the industrial waste gas containing VOCs be sufficiently mixed with absorbent, and physical-chemical reaction occurs；
2) mixture containing VOCs industrial waste gas and absorbent enters in absorbent circulating slot 8, absorbs the suction of VOCs
Receive agent and collected Posterior circle utilization by absorbent circulating slot 8；Incoagulable gas enters back into aerofluxus washing column 6；
3) in aerofluxus washing column 6, absorbent sprays down over from aerofluxus washing column 6, and sprinkler discharge density is 2～20m3/
m2·h；Incoagulable gas enters from the bottom of aerofluxus washing column 6 tower, with absorbent counter current contacting during up, reacted
Absorbent also returns to absorbent circulating slot 8；Absorb, containing in VOCs industrial waste gas through aerofluxus washer and aerofluxus washing column two step
Most of VOCs composition absorbed by absorbent；
4) tail gas after aerofluxus washing column 6 washs is pumped to waste gas combustion furnace 2 by waste gas air-introduced machine 5, and allocates into combustion-supporting
Air burns, and incineration temperature 800～1200 DEG C in stove, pressure in the burner hearth-100～-200Pa, industrial waste gas burns at waste gas
In burning stove 2, the burning time of staying is 1～3s；
5), after the clean tail gas after waste gas combustion furnace 2 burns is cooled to below 150 DEG C, discharged by chimney 3.
Described absorbent uses organic solvent, washing oil or diesel oil.
After described waste gas combustion furnace 2, the type of cooling of clean tail gas determines according to treatment scale, handled Industry Waste tolerance≤
3000m3During/h, use air cooling way；Handled Industry Waste tolerance ＞ 10000m3During/h, use heat exchange in air preheater
Mode reclaims heat.
For realizing a kind of processing system containing VOCs industrial waste gas of described technique, including aerofluxus washer 7, absorbent
Circulating slot 8, aerofluxus washing column 6, absorbent cooler 10 and waste gas combustion furnace 2；Absorbent is set bottom described absorbent circulating slot 8
Outlet, top sets mixture inlet and aerofluxus washing column 6, and absorbent outlet connects aerofluxus washer by absorbent conveyance conduit
Nozzle on 7, absorbent conveyance conduit is sequentially provided with absorbent circulating pump 9 and absorbent cooler 10；Absorbent cooler
Absorbent conveyance conduit after 10 additionally connects the top absorbent entrance of aerofluxus washing column 6；The exhaust gas entrance of aerofluxus washer 7
Connecting industrial waste gas pipeline, the mixture outlet of aerofluxus washer 7 connects the mixture inlet of absorbent circulating slot 8；Aerofluxus is washed
The top waste gas outlet of clean tower 6 connects the gas flare 1 bottom waste gas combustion furnace 2, waste gas combustion furnace by waste gas air-introduced machine 5
2 are provided with combustion air inlet, connect outside atmosphere by air blower 4；Waste gas combustion furnace 2 top sets chimney 3.
Described aerofluxus washer 7 is injection type Venturi scrubber, has injection mixed function.
Described aerofluxus washing column 6 uses high-efficiency packing tower.
Described waste gas combustion furnace 2 uses vertical incinerator.
Described gas flare 1 is spreading efficient type burner, uses two-stage ignition mode, and arranges altar lamp.
Described gas flare 1 is provided with flame detector, propeller and lighter.
Described absorbent circulating slot 8 is integrated with aerofluxus washing column 6, and aerofluxus washing column 6 is arranged on absorbent and follows
The top of annular groove 8；Waste gas combustion furnace 2 is also integrated with chimney 3, and chimney 3 is arranged on the top of waste gas combustion furnace 2.
Absorbent needs periodic replacement, and useless absorbent can carry out the subsequent treatment of different modes according to its character.Use washing oil
When making absorbent with diesel oil, useless absorbent can be sent into coal tar and crude oil, re-work；Organic solvent is used to make absorbent
Time, useless absorbent can be sent into regeneration unit, regeneration Posterior circle uses.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, according to technical scheme and
Inventive concept equivalent or change in addition, all should contain within protection scope of the present invention.
Claims (10)
1. the process technique containing VOCs industrial waste gas, it is characterised in that comprise the steps:
1) by absorbent circulating pump, the absorbent in absorbent circulating slot is extracted out, be cooled to 30～80 through absorbent cooler
After DEG C, sending in the nozzle of aerofluxus washer, the absorbent pressure entering aerofluxus washer is 0.4～1.0Mpa；Aerofluxus is cleaned
In device, the pressure of exhaust gas entrance is-1～-5kPa, utilizes this negative pressure will contain VOCs industrial waste gas and sucks aerofluxus washer, makes to contain
VOCs industrial waste gas is sufficiently mixed with absorbent, and physical-chemical reaction occurs；
2) mixture containing VOCs industrial waste gas and absorbent enters in absorbent circulating slot, absorb the absorbent of VOCs by
Absorbent circulating slot is collected Posterior circle and is utilized；Incoagulable gas enters back into aerofluxus washing column；
3) in aerofluxus washing column, absorbent sprays down over from aerofluxus washing column, and sprinkler discharge density is 2～20m3/m2·h；No
Solidifying property gas enters from the bottom of aerofluxus washing column tower, and with absorbent counter current contacting during up, reacted absorbent is also
Return to absorbent circulating slot；Absorb, containing the major part in VOCs industrial waste gas through aerofluxus washer and aerofluxus washing column two step
VOCs composition is absorbed by absorbent；
4) tail gas after aerofluxus washing column washs is pumped to waste gas combustion furnace by waste gas air-introduced machine, and allocates combustion air into and carry out
Burning, incineration temperature 800～1200 DEG C in stove, pressure in the burner hearth-100～-200Pa, tail gas burns in waste gas combustion furnace and stops
Staying the time is 1～3s；
5), after the clean tail gas after waste gas combustion furnace burns is cooled to below 150 DEG C, smoke stack emission is passed through.
A kind of process technique containing VOCs industrial waste gas the most according to claim 1, it is characterised in that described absorbent is adopted
With organic solvent, washing oil or diesel oil.
A kind of process technique containing VOCs industrial waste gas the most according to claim 1, it is characterised in that described burned waste gas
The type of cooling of the clean tail gas of furnace rear determines according to treatment scale, handled Industry Waste tolerance≤3000m3During/h, use air-cooled side
Formula；Handled Industry Waste tolerance ＞ 10000m3During/h, the mode of heat exchange in air preheater is used to reclaim heat.
4. for realizing a kind of processing system containing VOCs industrial waste gas of technique described in claim 1, it is characterised in that include
Aerofluxus washer, absorbent circulating slot, aerofluxus washing column, absorbent cooler and waste gas combustion furnace；Described absorbent circulating slot
Bottom sets absorbent outlet, and top sets mixture inlet and aerofluxus washing column, and absorbent outlet is by absorbent conveyance conduit even
Run in the nozzle on gas washer, and absorbent conveyance conduit is sequentially provided with absorbent circulating pump and absorbent cooler；Absorb
Absorbent conveyance conduit after agent cooler additionally connects the top absorbent entrance of aerofluxus washing column；The waste gas of aerofluxus washer
Entrance connects industrial waste gas pipeline, and the mixture outlet of aerofluxus washer connects the mixture inlet of absorbent circulating slot；Aerofluxus
The top waste gas outlet of washing column connects the gas flare of burned waste gas furnace bottom by waste gas air-introduced machine, on waste gas combustion furnace
It is provided with combustion air inlet, connects outside atmosphere by air blower；Waste gas combustion furnace top sets chimney.
A kind of processing system containing VOCs industrial waste gas the most according to claim 4, it is characterised in that described aerofluxus is cleaned
Device is injection type Venturi scrubber, has injection mixed function.
A kind of processing system containing VOCs industrial waste gas the most according to claim 4, it is characterised in that described aerofluxus is cleaned
Tower uses high-efficiency packing tower.
A kind of processing system containing VOCs industrial waste gas the most according to claim 4, it is characterised in that described burned waste gas
Stove uses vertical incinerator.
A kind of processing system containing VOCs industrial waste gas the most according to claim 4, it is characterised in that described waste gas burning
Device is spreading efficient type burner, uses two-stage ignition mode, and arranges altar lamp.
A kind of processing system containing VOCs industrial waste gas the most according to claim 4, it is characterised in that described waste gas burning
Device is provided with flame detector, propeller and lighter.
A kind of processing system containing VOCs industrial waste gas the most according to claim 4, it is characterised in that described absorbent
Circulating slot is integrated with aerofluxus washing column, and aerofluxus washing column is arranged on the top of absorbent circulating slot；Waste gas combustion furnace
Also being integrated with chimney, chimney is arranged on the top of waste gas combustion furnace.
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Application publication date: 20161221 |