CN109173564A - A kind of bituminous mixing plant exhaust gas treating method - Google Patents
A kind of bituminous mixing plant exhaust gas treating method Download PDFInfo
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- CN109173564A CN109173564A CN201811376899.1A CN201811376899A CN109173564A CN 109173564 A CN109173564 A CN 109173564A CN 201811376899 A CN201811376899 A CN 201811376899A CN 109173564 A CN109173564 A CN 109173564A
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- tail gas
- gas
- mixing plant
- discharger
- treating method
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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
- B01D53/002—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 condensation
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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
- B01D53/26—Drying gases or vapours
- B01D53/266—Drying gases or vapours by filtration
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
A kind of bituminous mixing plant exhaust gas treating method includes the following steps: that tail gas is cooled to tail gas condensing through spray cooling device and goes out liquid droplet by (1)；(2) tail gas after cooling is sent into demister to the liquid droplet isolated in tail gas；(3) tail gas after demisting is sent into discharger and is heated to exhaust temperature higher than dew-point temperature through hot gas, it is then discharged out atmosphere, bituminous mixing plant is generated tail gas water capacity using spray cooling device by the service system reduces by 70%~90%, and the liquid water being condensed out is separated using demister, the tail gas that cool-down dehumidification is crossed is discharged into atmosphere after mixing heating with the hot gas in flue, tail gas water capacity after system is handled is greatly reduced and temperature is higher than dew-point temperature, it is discharged into after atmosphere before abundant diffusion, temperature will not drop to dew-point temperature or less, to which no hydrometeor is formed.
Description
Technical field
The invention belongs to pitch preparation fields, and in particular to a kind of bituminous mixing plant exhaust gas treating method.
Background technique
Aggregate drying process will form a large amount of high temperature, containing the high waste gas of dust, water capacity in bituminous mixing plant, at present
Processing method to exhaust gas is to be directly discharged into atmosphere after dedusting.However this very high exhaust gas of humidity encounters temperature after ambient, cool air
Degree sharply declines, and when exhaust gas temperature is reduced to dew-point temperature or less, vapor therein is condensed into liquid droplet, causes to be vented
Hydrometeor is formed at mouthful, this is very easy to occur in the case where environment temperature is lower and (or) the biggish situation of air humidity.Although
Pollutant in exhaust gas has reached discharge standard, however for ruck, tend to see exist around exhaust outlet
One white cigarette area, therefore a large amount of water mists in exhaust gas can be mistakenly considered a large amount of pollutants, so that white haze visual pollution is caused, and
White haze can reduce the visibility of neighboring area, lead to the fear of neighbouring resident.
Summary of the invention
The purpose of the present invention is overcoming the prior art, a kind of bituminous mixing plant exhaust gas treating method is provided.
The present invention adopts the following technical scheme:
A kind of bituminous mixing plant exhaust gas treating method, includes the following steps:
(1) tail gas is cooled to tail gas condensing through spray cooling device and goes out liquid droplet；
(2) tail gas after cooling is sent into demister to the liquid droplet isolated in tail gas；
(3) tail gas after demisting is sent into discharger and is heated to exhaust temperature higher than dew-point temperature, then through hot gas
Atmosphere is discharged.
It further, further include that step (4) is acquired by image of the image acquiring device to discharger exhaust outlet,
The image information of control device analysis processing image acquiring device feedback simultaneously controls tail in spray cooling device according to processing result
The warming temperature of tail gas in the cooling temperature and/or discharger of gas.
Further, it is set with first threshold and second threshold in the control device, control device is obtained according to image
The aqueous vapor amount of the image information analysis exhaust outlet tail gas of device feedback, and the aqueous vapor amount and first threshold and first threshold are carried out
Compare, when aqueous vapor amount is lower than first threshold, control device controls water treatment facilities reduction to the water supply of spray cooling device
And/or control hot gas feeding mechanism reduces the hot gas supply to discharger, and when aqueous vapor amount is higher than second threshold, control dress
Control water treatment facilities is set to improve to the water supply of spray cooling device and/or control hot gas feeding mechanism raising to discharger
Hot gas supply, when aqueous vapor amount is between first threshold, second threshold, control device control water treatment facilities keep pair
The water supply and control hot gas feeding mechanism of spray cooling device keep the hot gas supply to discharger.
Further, tail gas is cooled to 30-40 DEG C in the spray cooling device.
Further, tail gas is warming up to 50-70 DEG C in the discharger.
Further, the discharger includes flue, thermal insulation layer, electric hybrid module and support, and flue passes through seat supports
On ground；Thermal insulation layer is wrapped in the outer surface of flue；The upper section of flue is arranged in electric hybrid module, mixes to tail gas and hot gas
It closes.
Further, the electric hybrid module includes the multiple porous plates being interspersed in flue upper section.
Further, the demister includes reservoir, demister and plumbing drain, and demister and discharger connect
It connects, the liquid droplet in tail gas after separation cooling；Reservoir is connect with demister, collects the liquid water that demister is separated
Pearl；Plumbing drain one end is connect with reservoir, and the other end is connect with water treatment facilities.
Further, the demister is obliquely installed in height, and the upper end is connect with discharger, and lower end and reservoir connect
It connects, the spray cooling device is connect by gas pipeline with reservoir.
Further, the spray cooling device includes cabinet and multiple groups spray assemblies, is provided with outlet on the cabinet
Mouth and air inlet, the bottom of cabinet are provided with water tank, and multiple groups spray assemblies interleaved is distributed in cabinet, including setting exists
Demarcation plate in cabinet, what the water-division pipeline and being arranged in being extended along demarcation plate length was connect on demarcation plate with water supply pipe
Multiple nozzles.
By the above-mentioned description of this invention it is found that compared with prior art, the beneficial effects of the present invention are:
Bituminous mixing plant is generated tail gas water capacity reduction by 70%~90% using spray cooling device by the service system, and
The liquid water being condensed out is separated using demister, the tail gas that cool-down dehumidification is crossed mixes heating heel row with the hot gas in flue
Enter atmosphere, tail gas water capacity after system is handled is greatly reduced and temperature is higher than dew-point temperature, is sufficiently expanding after being discharged into atmosphere
Before dissipating, temperature will not drop to dew-point temperature hereinafter, to which no hydrometeor is formed.
It is provided with image acquiring device at offgas outlet, tail gas image information is fed back into control device, control device point
The image information of analysis processing image acquiring device feedback simultaneously controls hot gas feeding mechanism to the heat of discharger according to processing result
Gas supply and/or water treatment facilities automatically control spray cooling device and heat to the water supply of spray cooling device to realize
Gas feeding mechanism realizes the purpose of automatic control.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of exhaust treatment system of the present invention；
Fig. 2 is the flow chart of exhaust gas treating method of the present invention；
In figure, 1- spray cooling device, 2- demister, 3- discharger, 4- hot gas feeding mechanism, 5- control device,
6- image acquiring device, 7- water treatment facilities, 11- cabinet, 111- air inlet, the gas outlet 112-, 113 water tanks, 12- spray group
Part, 121- demarcation plate, 122- water-division pipeline, 123- nozzle, the total water supply pipe of 124-, 125- waste water recovery pipe, 21- demister,
22- reservoir, 23- gas pipeline, 24- plumbing drain, 31- flue, 311- exhaust outlet, 32- thermal insulation layer, 33- electric hybrid module,
34- support.
Specific embodiment
Below by way of specific embodiment, the invention will be further described.
Referring to figs. 1 to shown in Fig. 2, a kind of exhaust treatment system of bituminous mixing plant, including spray cooling device 1, demisting
Device 2, discharger 3, hot gas feeding mechanism 4, water treatment facilities 7, image acquiring device 6 and control device 5.
The tail gas of 1 pair of spray cooling device entrance cools down, and tail gas condensing is made to go out liquid droplet, including cabinet 11 and more
Spray assemblies 12 to be organized, are provided with air inlet 111 and gas outlet 112 on cabinet 11, the bottom of cabinet 11 is provided with water tank 113,
The waste water after spray assemblies 12 spray is collected, air inlet 111 is arranged on the side wall of cabinet 11, positioned at the top of water tank 113,
Gas outlet 112 is arranged on the side wall of cabinet 11, and 12 interleaved of spray assemblies is distributed in cabinet 11, including is arranged in cabinet
Demarcation plate 121 in 11, the water-division pipeline 122 being extended on demarcation plate 121 along 121 length of demarcation plate is set, setting exists
Multiple nozzles 123 for connecting on demarcation plate 121 with water supply pipe 122, one end connect the other end and water with multiple water-division pipelines 122
What the total water supply pipe 124 and one end that processing unit 7 connects connect that the other end connect with water treatment facilities 7 with water tank 113 gives up
Water recovery tube 125,12 interleaved of multiple groups spray assemblies are distributed in cabinet 11, flow up tail gas in " S " type, so as to tail
The cooling water that gas sprays out with nozzle 123 comes into full contact with, and reaches better cooling effect, and further, tail gas is in spraying cooling
Device 1 is cooled to 30-40 DEG C.
Demister 2 is connect with spray cooling device 1, the liquid droplet in tail gas after separation cooling, including demister
21, reservoir 22, plumbing drain 24 and gas pipeline 23, demister 21 are obliquely installed in height, and the upper end and discharger 3 connect
It connects, lower end is connect with reservoir 22；Reservoir 22 collects the liquid droplet that demister 21 is separated；24 one end of plumbing drain with
Reservoir 22 connects, and the other end is connect with water treatment facilities 7, and the liquid water that reservoir 22 is collected is sent into water treatment facilities 7
It is handled；23 one end of gas pipeline is connect with the gas outlet 112 of spray cold-zone device 1, the top of the other end and reservoir 22
Connection, the tail gas after cooling is introduced into demister 21 and is handled.
Discharger 3 is connect with demister 21, be heated to exhaust temperature higher than after dew-point temperature to the tail gas of entrance
It being discharged into atmosphere, including flue 31, thermal insulation layer 32, mixing group 33 and support 34, flue 31 is supported on the ground by support 34,
Its top is provided with exhaust outlet 311；Thermal insulation layer 32 is wrapped in the outer surface of flue 31, to reduce the thermal loss in flue 31；
The upper section of flue 31 is arranged in electric hybrid module 33, mixes to tail gas and hot gas, and electric hybrid module 33 includes being interspersed in cigarette
Multiple porous plates of 31 upper section of road, specifically, tail gas is warming up to 50-70 DEG C in discharger 3.
Hot gas feeding mechanism 4 is connect with the lower section of flue 31, hot gas is supplied to flue 31, specifically, hot gas feeding mechanism 4
It can be burner, the device of hot gas can be provided by being also possible to other.
Pond processing unit 7 is connect with water tank 113 and reservoir 22 respectively, be recycled water tank 113 waste water and
The liquid water collected in reservoir 22 simultaneously will treated that water supply spray cooling device 1 sprays.
Image acquiring device 6 is arranged at exhaust outlet 311, acquires the image at exhaust outlet 311 and feeds back to control device
5, specific image acquiring device 6 includes camera.
Control device 5 connect 7 with image acquiring device 6, hot gas feeding mechanism 4, water treatment facilities, and control device 5 is analyzed
It handles the image information that image acquiring device 6 is fed back and controls the cooling temperature of tail gas in spray cooling device 1 according to processing result
The warming temperature of tail gas in degree and/or discharger 3, control device 5 includes single-chip microcontroller, MCU or DSP, specifically, control dress
It sets 5 and hot gas feeding mechanism 4 is controlled to the hot gas supply of discharger 3 and/or 7 pairs of water treatment facilities sprays according to processing result
The water supply of cooling device 1 is further set with first threshold and second threshold, 5 basis of control device in control device 5
The aqueous vapor amount for 311 tail gas of image information analysis exhaust outlet that image acquiring device 6 is fed back, and by the aqueous vapor amount and first threshold and
First threshold is compared, and when aqueous vapor amount is lower than first threshold, it is cold to spraying that control device 5 controls the reduction of water treatment facilities 7
But the water supply of device 1 and/or control hot gas feeding mechanism 4 reduce the hot gas supply to discharger 3；When aqueous vapor amount is higher than
When second threshold, control device 5 controls water treatment facilities 7 and improves the water supply to spray cooling device 1 and/or control hot gas confession
Device 4 is answered to improve the hot gas supply to discharger 3；When aqueous vapor amount is between first threshold, second threshold, control dress
5 control water treatment facilities 7 are set to keep that the water supply and control hot gas feeding mechanism 4 of spray cooling device 1 are kept filling discharge
Set 3 hot gas supply.
A kind of bituminous mixing plant exhaust gas treating method, includes the following steps:
(1) tail gas that bituminous mixing plant generates enters spray cooling device 1 from air inlet 111, and nozzle 123, which sprays out, to be cooled down
Water is sufficiently mixed with tail gas, and tail gas cooling is made to be condensed out liquid droplet, and water tank 113 is collected and the mixed waste water of tail gas；
(2) tail gas after cooling down is carried out in demister 21 by gas pipeline 23, and demister 21 is by the liquid water in tail gas
Pearl is separated, and reservoir 22 collects the liquid droplet after demister 21 separates；
(3) tail gas after demisting enters flue 31, is mixed and heated to tail through electric hybrid module 33 in uphill process with hot gas
Temperature degree is higher than dew-point temperature, is then discharged into atmosphere through exhaust outlet 311；
(4) image acquiring device 6 is acquired to 311 image of exhaust outlet and feeds back to control device 5, in control device 5
It is set with first threshold and second threshold, control device 5 is according to the aqueous vapor amount of 311 tail gas of image analysis exhaust outlet, and by the water
Tolerance is compared with first threshold and first threshold, when aqueous vapor amount is lower than first threshold, illustrates exhaust temperature much higher than dew
Point temperature, control device 5 control water treatment facilities 7 and reduce the water supply to spray cooling device 1 and/or control hot gas supply dress
4 reductions are set to the hot gas supply of discharger 3；When aqueous vapor amount is higher than second threshold, illustrate exhaust temperature lower than dew point temperature
Degree, control device 5 control water treatment facilities 7 and improve the water supply to spray cooling device 1 and/or control hot gas feeding mechanism 4
Improve the hot gas supply to discharger 3；When aqueous vapor amount is between first threshold, second threshold, control device 5 is controlled
Water treatment facilities 7 keeps keeping the water supply and control hot gas feeding mechanism 4 of spray cooling device 1 heat to discharger 3
Gas supply.
Bituminous mixing plant is generated tail gas water capacity using spray cooling device 1 by the service system reduces by 70%~90%,
And separated using 21 liquid waters being condensed out of demister, the tail gas that cool-down dehumidification is crossed mixes heating with hot gas in flue 31
After be discharged into atmosphere, image acquiring device 6 is provided at exhaust outlet 311 by tail gas image information and feeds back to control device 5, with reality
Water treatment facilities 7 and hot gas feeding mechanism 4 are now automatically controlled, tail gas water capacity after system is handled is greatly reduced and temperature is high
In dew-point temperature, it is discharged into after atmosphere before abundant diffusion, temperature will not drop to dew-point temperature hereinafter, to no hydrometeor shape
At.
The foregoing is only a preferred embodiment of the present invention, therefore cannot be limited the scope of implementation of the present invention with this, i.e.,
According to equivalent changes and modifications made by scope of the present invention patent and description, it should still belong to what the invention patent covered
In range.
Claims (10)
1. a kind of bituminous mixing plant exhaust gas treating method, characterized by the following steps:
(1) tail gas is cooled to tail gas condensing through spray cooling device and goes out liquid droplet；
(2) tail gas after cooling is sent into demister to the liquid droplet isolated in tail gas；
(3) tail gas after demisting is sent into discharger and is heated to exhaust temperature higher than dew-point temperature through hot gas, be then discharged out
Atmosphere.
2. a kind of bituminous mixing plant exhaust gas treating method according to claim 1, it is characterised in that: further include step (4)
It is acquired by image of the image acquiring device to discharger exhaust outlet, control device analysis processing image acquiring device is anti-
The image information of feedback and according to processing result control spray cooling device in tail gas cooling temperature and/or discharger in tail gas
Warming temperature.
3. a kind of bituminous mixing plant exhaust gas treating method according to claim 2, it is characterised in that: in the control device
It is set with first threshold and second threshold, the image information analysis exhaust outlet tail gas that control device is fed back according to image acquiring device
Aqueous vapor amount, and the aqueous vapor amount is compared with first threshold and first threshold, when aqueous vapor amount is lower than first threshold, control
Device, which controls water treatment facilities, which to be reduced, reduces and fills to discharge to the water supply and/or control hot gas feeding mechanism of spray cooling device
The hot gas supply set, when aqueous vapor amount is higher than second threshold, control device controls water treatment facilities and improves to spraying cooling dress
The water supply and/or control hot gas feeding mechanism set improve the hot gas supply to discharger, when aqueous vapor amount is between the first threshold
When between value, second threshold, control device controls water treatment facilities and keeps the water supply to spray cooling device and control hot gas
Feeding mechanism keeps the hot gas supply to discharger.
4. a kind of bituminous mixing plant exhaust gas treating method according to claim 3, it is characterised in that: the spraying cooling dress
It sets middle tail gas and is cooled to 30-40 DEG C.
5. a kind of bituminous mixing plant exhaust gas treating method according to claim 3, it is characterised in that: in the discharger
Tail gas is warming up to 50-70 DEG C.
6. a kind of bituminous mixing plant exhaust gas treating method according to any one of claims 1 to 5, it is characterised in that: described
Discharger includes flue, thermal insulation layer, electric hybrid module and support, and flue is by seat supports on ground；Thermal insulation layer is wrapped in cigarette
The outer surface in road；The upper section of flue is arranged in electric hybrid module, mixes to tail gas and hot gas.
7. a kind of bituminous mixing plant exhaust gas treating method according to claim 6, it is characterised in that: the electric hybrid module packet
Include the multiple porous plates being interspersed in flue upper section.
8. a kind of bituminous mixing plant exhaust gas treating method according to any one of claims 1 to 5, it is characterised in that；It is described
Demister includes reservoir, demister and plumbing drain, and demister is connect with discharger, in the tail gas after separation cooling
Liquid droplet；Reservoir is connect with demister, collects the liquid droplet that demister is separated；Plumbing drain one end and reservoir
Connection, the other end are connect with water treatment facilities.
9. a kind of bituminous mixing plant exhaust gas treating method according to claim 8, it is characterised in that: the demister is in height
Low dip setting, the upper end are connect with discharger, and lower end is connect with reservoir, and the spray cooling device passes through gas pipeline
It is connect with reservoir.
10. a kind of bituminous mixing plant exhaust gas treating method according to any one of claims 1 to 5, it is characterised in that: described
Spray cooling device includes cabinet and multiple groups spray assemblies, and gas outlet and air inlet, the bottom of cabinet are provided on the cabinet
It is provided with water tank, multiple groups spray assemblies interleaved is distributed in cabinet, including the demarcation plate being arranged in cabinet, along separation
The water-division pipeline and the multiple nozzles connecting on demarcation plate with water supply pipe are set that plate length is extended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811376899.1A CN109173564B (en) | 2018-11-19 | 2018-11-19 | Tail gas treatment method for asphalt mixing plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811376899.1A CN109173564B (en) | 2018-11-19 | 2018-11-19 | Tail gas treatment method for asphalt mixing plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109173564A true CN109173564A (en) | 2019-01-11 |
| CN109173564B CN109173564B (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811376899.1A Active CN109173564B (en) | 2018-11-19 | 2018-11-19 | Tail gas treatment method for asphalt mixing plant |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201811262U (en) * | 2010-09-27 | 2011-04-27 | 洛阳市天誉环保工程有限公司 | Tail gas dehumidification device for wet-process flue gas purification |
| JP2013087988A (en) * | 2011-10-14 | 2013-05-13 | Mitsubishi Heavy Industries Environmental & Chemical Engineering Co Ltd | White smoke preventing method and apparatus for achieving the same |
| JP2015137797A (en) * | 2014-01-22 | 2015-07-30 | 株式会社大川原製作所 | Gas treatment system |
| CN105498431A (en) * | 2016-01-29 | 2016-04-20 | 大连科林能源工程技术开发有限公司 | Environmental protection treatment system for tail gas generated by wood fiber drying device |
| CN108067085A (en) * | 2016-11-09 | 2018-05-25 | 湖北鑫固久技术装备有限公司 | A kind of coal chemical industry exhaust gas treating method and device |
-
2018
- 2018-11-19 CN CN201811376899.1A patent/CN109173564B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201811262U (en) * | 2010-09-27 | 2011-04-27 | 洛阳市天誉环保工程有限公司 | Tail gas dehumidification device for wet-process flue gas purification |
| JP2013087988A (en) * | 2011-10-14 | 2013-05-13 | Mitsubishi Heavy Industries Environmental & Chemical Engineering Co Ltd | White smoke preventing method and apparatus for achieving the same |
| JP2015137797A (en) * | 2014-01-22 | 2015-07-30 | 株式会社大川原製作所 | Gas treatment system |
| CN105498431A (en) * | 2016-01-29 | 2016-04-20 | 大连科林能源工程技术开发有限公司 | Environmental protection treatment system for tail gas generated by wood fiber drying device |
| CN108067085A (en) * | 2016-11-09 | 2018-05-25 | 湖北鑫固久技术装备有限公司 | A kind of coal chemical industry exhaust gas treating method and device |
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| CN109173564B (en) | 2020-07-17 |
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