CN219744429U - Volatile organic compound-containing waste gas treatment device - Google Patents
Volatile organic compound-containing waste gas treatment device Download PDFInfo
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- CN219744429U CN219744429U CN202322167052.5U CN202322167052U CN219744429U CN 219744429 U CN219744429 U CN 219744429U CN 202322167052 U CN202322167052 U CN 202322167052U CN 219744429 U CN219744429 U CN 219744429U
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- 239000002912 waste gas Substances 0.000 title claims abstract description 71
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 140
- 239000007921 spray Substances 0.000 claims abstract description 83
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000005406 washing Methods 0.000 claims abstract description 66
- 238000001914 filtration Methods 0.000 claims abstract description 50
- 238000012856 packing Methods 0.000 claims abstract description 48
- 238000005507 spraying Methods 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 39
- 238000005276 aerator Methods 0.000 claims abstract description 34
- 239000000945 filler Substances 0.000 claims abstract description 28
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 239000000356 contaminant Substances 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 description 10
- 231100000719 pollutant Toxicity 0.000 description 10
- 244000005700 microbiome Species 0.000 description 9
- 239000012530 fluid Substances 0.000 description 8
- 239000010865 sewage Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- -1 particulate matters Substances 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model provides a volatile organic compound-containing waste gas treatment device, which comprises: a washing tower, a biological tower and an activated carbon adsorber; the biological tower comprises a biological trickling filtration section and a biological filtration section which are sequentially connected in series; the biological trickling filtration section is internally provided with a first aerator, the first aerator is connected with a first air inlet, and a first filler layer is arranged above the first aerator; a first spray header is arranged above the first packing layer and is suitable for spraying liquid to the first packing layer, and the falling spray liquid passes through the first packing layer and then contacts with waste gas discharged by the first aerator; a second filler layer is arranged in the biological filtering section; and a second spray header is arranged above the second packing layer and is suitable for spraying liquid to the second packing layer. The volatile organic compound-containing waste gas treatment device disclosed by the utility model can effectively treat volatile organic compound-containing waste gas with large gas quantity, low concentration and large fluctuation, and is low in running cost and simple and safe to operate.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment, in particular to a volatile organic compound-containing waste gas treatment device.
Background
The petrochemical industry generally generates a large amount of sewage in the production process, and the variety and characteristics of the sewage are complex and various due to the large number of petrochemical products. In the sewage treatment process, malodorous gas emitted from sewage collection tanks, sewage treatment tanks, pump rooms, workshops and the like seriously pollute the ecological environment around the treatment plant. These malodorous gases are mainly waste gases formed by volatile organic compounds contained in sewage. The waste gas mainly contains non-methane total hydrocarbon, benzene, toluene, xylene, sulfide and other atmospheric pollutants, and is characterized by large gas quantity, low concentration and large fluctuation, so that the treatment difficulty is high and the good treatment effect is difficult to achieve.
Disclosure of Invention
The utility model aims to provide a volatile organic compound-containing waste gas treatment device, which aims to solve the problems that the existing waste gas treatment device is difficult to treat volatile organic compound-containing waste gas with large gas quantity, low concentration and large fluctuation.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
a volatile organic compound-containing exhaust gas treatment device, comprising:
a scrubber adapted to spray a liquid onto the volatile organic containing waste gas to remove contaminants soluble in the sprayed liquid;
the biological tower is connected with the washing tower through a pipeline and is suitable for receiving the volatile organic compound-containing waste gas treated by the washing tower; the biological tower comprises a biological trickling filtration section and a biological filtration section which are sequentially connected in series;
the activated carbon absorber is connected with the biological tower through a pipeline and is suitable for receiving the waste gas containing volatile organic compounds after being treated by the biological tower;
the bottom of the biological trickling filtration section is provided with a first air inlet, and the top of the biological trickling filtration section is provided with a first air outlet; a first aerator is arranged in the biological trickling filtration section, the first aerator is connected with a first air inlet, and a first filler layer is arranged above the first aerator; a first spray header is arranged above the first packing layer and is suitable for spraying liquid to the first packing layer, and the falling spray liquid passes through the first packing layer and then contacts with waste gas discharged by the first aerator;
the bottom of the biological filtering section is provided with a second air inlet, and the top of the biological filtering section is provided with a second air outlet; a second filler layer is arranged in the biological filtering section; a second spray header is arranged above the second packing layer and is suitable for spraying liquid to the second packing layer;
the spraying amount of the first spraying head is larger than that of the second spraying head.
Preferably, the scrubber comprises:
the washing spray head is arranged at the top of the washing tower;
and the washing filler layer is arranged below the washing spray header and above the air inlet of the washing tower, and is suitable for enabling the waste gas containing volatile organic compounds to contact with liquid sprayed by the washing spray header.
Preferably, the scrubber further comprises a mist eliminator; the demister is arranged between the washing spray header and the air outlet of the washing tower.
Preferably, the volatile organic compound-containing waste gas treatment device further comprises:
the liquid inlet of the first circulating liquid box is connected with the liquid outlet at the bottom end of the washing tower, and the liquid outlet of the first circulating liquid box is connected with the washing spray header;
the first circulating pump is arranged between the liquid outlet of the first circulating liquid tank and the washing spray header.
Preferably, the volatile organic compound-containing waste gas treatment device further comprises:
the liquid inlet of the second circulating liquid box is connected with the liquid outlet at the bottom end of the biological trickling filtration section, and the liquid outlet of the second circulating liquid box is connected with the first spray header;
the second circulating pump is arranged between the liquid outlet of the second circulating liquid tank and the first spray header;
the liquid inlet of the third circulating liquid box is connected with the liquid outlet at the bottom end of the biological filtering section, and the liquid outlet of the third circulating liquid box is connected with the second spray header;
and the third circulating pump is arranged between the liquid outlet of the third circulating liquid tank and the second spray header.
Preferably, the second circulating liquid tank and/or the third circulating liquid tank are provided with a liquid supplementing port and a gas supplementing port.
Preferably, a demisting filler is arranged at the first air outlet of the biological trickling filtration section and/or the second air outlet of the biological filtration section.
Preferably, a flame arrester is arranged between the biological filtering section and the activated carbon adsorber.
Preferably, the activated carbon adsorber is connected to a vent cartridge.
Preferably, the number of the activated carbon adsorbers is two, and the two activated carbon adsorbers are connected in parallel.
The scheme of the utility model at least comprises the following beneficial effects:
(1) The utility model relates to a volatile organic compound-containing waste gas treatment device, which comprises: a washing tower, a biological tower and an activated carbon adsorber; the washing tower is suitable for spraying liquid to the waste gas containing volatile organic compounds and removing pollutants soluble in the spraying liquid; the biological tower is connected with the washing tower through a pipeline and is suitable for receiving the waste gas containing volatile organic compounds after being treated by the washing tower; the biological tower comprises a biological trickling filtration section and a biological filtration section which are sequentially connected in series; the activated carbon adsorber is connected with the biological tower through a pipeline and is suitable for receiving the waste gas containing volatile organic compounds after being treated by the biological tower; the bottom of the biological trickling filtration section is provided with a first air inlet, and the top of the biological trickling filtration section is provided with a first air outlet; a first aerator is arranged in the biological trickling filtration section, the first aerator is connected with a first air inlet, and a first filler layer is arranged above the first aerator; a first spray header is arranged above the first packing layer and is suitable for spraying liquid to the first packing layer, and the falling spray liquid passes through the first packing layer and then contacts with waste gas discharged by the first aerator; the bottom of the biological filtering section is provided with a second air inlet, and the top of the biological filtering section is provided with a second air outlet; a second filler layer is arranged in the biological filtering section; a second spray header is arranged above the second packing layer and is suitable for spraying liquid to the second packing layer; the spraying amount of the first spraying head is larger than that of the second spraying head.
The volatile organic compound-containing waste gas treatment device provided by the utility model is used for washing the volatile organic compound-containing waste gas through the washing tower, carrying out biodegradation on the biological tower and adsorbing the activated carbon adsorber. Specifically, first, pollutants soluble in the spray liquid, such as particulate matters, heavy oil components, hydrogen sulfide, and the like, in the volatile organic compound-containing exhaust gas are removed by the scrubber. Then, carrying out biodegradation on organic matters in the waste gas containing volatile organic matters through the biological tower; in particular, the biotrickling tower is arranged to be a biotrickling section and a biotrickling section which are connected in series, and the spraying amount of a first spraying head of the biotrickling section is larger than that of a second spraying head of the biotrickling section; the arrangement can provide more spray liquid through the first spray header with large spray quantity, so that the waste gas containing volatile organic compounds entering the biotrickling filter has larger contact with the spray liquid and more sufficient reaction; after the waste gas containing volatile organic compounds passes through the biological trickling filtration section, the waste gas enters the biological filtration section, and the carrying amount of spraying liquid in the waste gas is reduced through a second spray header with small spraying amount, so that the water vapor in the waste gas is reduced, the adsorption efficiency of the activated carbon adsorber is improved, and the waste caused by the fact that the activated carbon adsorber adsorbs excessive spraying liquid is avoided. Finally, adsorbing pollutants in the waste gas containing volatile organic compounds through the activated carbon adsorber to meet the emission requirement; meanwhile, due to the arrangement of the activated carbon adsorber, the impact resistance of the whole device is improved, and qualified air outlet and treatment standard can be ensured when the treatment air quantity is large and the pollutant concentration fluctuation is large.
In addition, be equipped with first aerator in the biological drip filtration section, when first shower head to first packing layer sprays liquid, the spray liquid that drops passes through first packing layer arrives first aerator's position department contacts with first aerator exhaust gas. For the waste gas containing volatile organic compounds entering the biological trickling filtration section, the waste gas is contacted with the spraying liquid through the first aerator, and then part of the spraying liquid is wrapped and clamped to enter the first packing layer, so that more sufficient degradation reaction is realized. Through the setting of first aerator, make get into volatile organic compounds waste gas that contains in the biological trickling filtration section contacts with spraying liquid earlier, has strengthened air film and liquid film's contact time and contact pressure, has improved the microorganism of first packing layer is to the treatment effeciency of waste gas, and the aerator has also guaranteed simultaneously the inlet air flow distribution of biological tower is even, has avoided the gas to pass through drift when the first packing layer, has improved the utilization efficiency of biofilm carrier.
(2) The volatile organic compound-containing waste gas treatment device disclosed by the utility model can effectively treat volatile organic compound-containing waste gas with large gas quantity, low concentration and large fluctuation, and is low in running cost and simple and safe to operate. The non-methane total hydrocarbons in the exhaust gas can be treated to 60mg/m 3 In the following, the exhaust gas has deodorizing function, and can meet the emission requirements of emission standards of pollutants in petroleum refining industry (GB 31570-2015) and emission standards of malodor pollution (GB 14554-1993).
Drawings
FIG. 1 is a schematic diagram of an exhaust gas treatment device containing volatile organic compounds according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the structure of a biological tower of the volatile organic compound-containing exhaust gas treatment device of FIG. 1;
FIG. 3 is a schematic view showing the structure of an exhaust gas treatment device containing volatile organic compounds according to another embodiment of the present utility model;
fig. 4 is a view showing a state of use of the volatile organic compound-containing exhaust gas treatment device of fig. 3.
Wherein, 1, a washing tower; 11. washing the spray header; 12. washing the filler layer; 13. a demister; 14. a first circulating liquid tank; 15. a first circulation pump; 2. a biological tower; 21. a bio-trickling filtration section; 211. a first air inlet; 212. a first air outlet; 213. a first aerator; 214. a first filler layer; 215. a first showerhead; 22. a biological filtration section; 221. a second air inlet; 222. a second air outlet; 223. a second aerator; 224. a second filler layer; 225. a second showerhead; 23. a second circulating liquid tank; 24. a second circulation pump; 25. a third circulating liquid tank; 26. a third circulation pump; 27. demisting filler; 3. an activated carbon adsorber; 4. a flame arrester; 5. an exhaust pipe; 6. a blower; 7. a vacuum pump; 801. waste gas containing volatile organic compounds; 802. a medicament; 803. water; 804. waste water; 805. steam; 806. and discharging the liquid.
Detailed Description
Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.
An embodiment of the present utility model provides an exhaust gas treatment device containing volatile organic compounds, as shown in fig. 1 to 4, including: a washing tower 1, a biological tower 2 and an activated carbon adsorber 3;
the washing tower 1 is suitable for spraying liquid to the waste gas containing volatile organic compounds and removing pollutants soluble in the spraying liquid;
the biological tower 2 is connected with the washing tower 1 through a pipeline and is suitable for receiving the waste gas containing volatile organic compounds after being treated by the washing tower 1; the biological tower 2 comprises a biological trickling filtration section 21 and a biological filtration section 22 which are sequentially connected in series;
the activated carbon adsorber 3 is connected with the biological tower 2 through a pipeline and is suitable for receiving the waste gas containing volatile organic compounds after being treated by the biological tower 2;
wherein, the bottom of the biological trickling filtration section 21 is provided with a first air inlet 211, and the top is provided with a first air outlet 212; a first aerator 213 is arranged in the biological trickling filtration section 21, the first aerator 213 is connected with the first air inlet 211, and a first filler layer 214 is arranged above the first aerator; a first spray header 215 is arranged above the first packing layer 214, and is adapted to spray liquid onto the first packing layer 214, and make the dropped spray liquid contact with the exhaust gas discharged from the first aerator 213 after passing through the first packing layer 214;
the bottom of the biological filtration section 22 is provided with a second air inlet 221, and the top is provided with a second air outlet 222; a second filler layer 224 is disposed within the biofiltration segment 22; a second spray header 225 is arranged above the second packing layer 224 and is suitable for spraying liquid to the second packing layer 224;
the first showerhead 215 sprays more than the second showerhead 225.
It should be noted that structural design parameters of the spray header, such as shape, size, angle, etc. of the spray holes, may affect the spray amount. In this embodiment, the spraying amount of the first spraying head 215 is greater than the spraying amount of the second spraying head 225, which means that the structural design parameters of the first spraying head 215 and the second spraying head 225 are different, and the two spraying amounts are different. The person skilled in the art can select the spray header with proper spray amount according to actual needs, namely, select the spray header with proper size and specification.
The design of the scrubber 1 is not unique for achieving the object of the present utility model, and in this embodiment, the scrubber 1 includes: a washing spray header 11 and a washing filler layer 12;
the washing spray header 11 is arranged at the top of the washing tower 1; the washing filler layer 12 is arranged below the washing spray header 11 and above the air inlet of the washing tower 1, and is suitable for enabling the waste gas containing volatile organic compounds to contact with liquid sprayed by the washing spray header 11 at the washing filler layer 12.
In order to reduce the entrainment of liquid by the flue gas treated by the scrubber 1 when it enters the biological column 2, the scrubber 1 further comprises a mist eliminator 13; the demister 13 is arranged between the washing spray header 11 and the air outlet of the washing tower 1.
In order to input the waste gas treated by the washing tower 1 into the biological tower 2, a fan 6 may be further disposed on a connecting pipeline between the washing tower 1 and the biological tower 2. In this embodiment, two fans 6 are provided, and the two fans 6 are connected in parallel.
In order to facilitate the cyclic use of the spray liquid in the washing tower 1, the volatile organic compound-containing waste gas treatment device, as shown in fig. 3, further comprises: a first circulation tank 14 and a first circulation pump 15;
the liquid inlet of the first circulating liquid tank 14 is connected with the liquid outlet at the bottom end of the washing tower 1, and the liquid outlet of the first circulating liquid tank 14 is connected with the washing spray header 11;
the first circulation pump 15 is disposed between the liquid outlet of the first circulation tank 14 and the washing shower head 11. The number of the first circulation pumps 15 may be two, and the two first circulation pumps 15 are connected in parallel.
In order to facilitate the replenishment of the spray liquid lost during the circulation process, the first circulation tank 14 may be further provided with a liquid replenishment port. As shown in fig. 4, the fluid replenishment port may be divided into a fluid replenishment port for replenishing water 803 and a fluid replenishment port for replenishing the chemical 802. The agent 802 may be a basic substance, such as NaOH. When the spray liquid is NaOH solution, the spray liquid can react with part of pollutants in the waste gas so as to improve the treatment efficiency.
In order to facilitate replacement of the recycled spray liquid, the first circulation tank 14 may also be provided with a drain. When the spray liquid is too much in impurity caused by recycling, the spray liquid can be discharged through the liquid outlet. As shown in fig. 4, the effluent 806 is discharged from the first circulation tank 14.
By the arrangement of the first circulating liquid tank 14 and the first circulating pump 15, the spraying liquid can be recycled between the first circulating liquid tank 14 and the washing tower 1. The spray liquid is conveyed to the washing spray header 11 by the first circulating pump 15 from the first circulating liquid tank 14, falls to the bottom liquid outlet of the washing tower 1 through the washing packing layer 12, and returns to the first circulating liquid tank 14.
The first packing layer 214 and the second packing layer 224 in the bio-tower 2 may be bio-packing commonly used in the prior art, and the bio-packing may be attached with microorganisms capable of degrading organic matters, and the microorganisms may be selected from microbial agents commonly used in the prior art for treating waste water and waste gas. The first packing layer 214 and the second packing layer 224 can transfer the organic matters in the volatile organic matters-containing waste gas from the gas phase to the biological membrane, and the microorganisms in the membrane are degraded and utilized to be converted into self biomass of the microorganisms, and the rest are oxidized and decomposed into CO 2 And H 2 O。
In order to facilitate the circulating use of the spraying liquid in the biological tower 2, as shown in fig. 3, the exhaust gas treatment device containing volatile organic compounds further includes: a second circulation tank 23, a second circulation pump 24, a third circulation tank 25, and a third circulation pump 26;
the liquid inlet of the second circulating liquid tank 23 is connected with the liquid outlet at the bottom end of the biological trickling filter section 21, and the liquid outlet of the second circulating liquid tank 23 is connected with the first spray header 215;
the second circulating pump 24 is arranged between the liquid outlet of the second circulating liquid tank 23 and the first spray header 215; the number of the second circulation pumps 24 may be two, and the two second circulation pumps 24 are connected in parallel.
The liquid inlet of the third circulating liquid tank 25 is connected with the liquid outlet at the bottom end of the biological filtering section 22, and the liquid outlet of the third circulating liquid tank 25 is connected with the second spray header 225;
the third circulation pump 26 is disposed between the liquid outlet of the third circulation tank 25 and the second shower head 225. The number of the third circulation pumps 26 may be two, and the two third circulation pumps 26 are connected in parallel.
As a preferred implementation manner of this embodiment, the second circulation tank 23 and/or the third circulation tank 25 are provided with a fluid supplementing port and a fluid supplementing port. The fluid-supplementing port may be an inlet of a nutrient solution required by microorganisms in the first packing layer 214 and the second packing layer 224, or may be water or wastewater of sewage treatment. The air supply port may be an inlet for steam, and the temperature of the first filler layer 214 and the second filler layer 224 may be adjusted by supplying steam so that microorganisms therein are at a suitable survival temperature. As shown in fig. 4, the chemical 802, the water 803 and the wastewater 804 enter the second circulation tank 23 and the third circulation tank 25 through the fluid supplementing ports; steam 805 enters the second circulating fluid tank 23 and the third circulating fluid tank 252 through the air supplementing port.
In order to facilitate replacement of the recycled spray liquid, the second circulation tank 23 and/or the third circulation tank 25 may further be provided with a liquid drain. When the spray liquid is too much in impurity caused by recycling, the spray liquid can be discharged through the liquid outlet. As shown in fig. 4, the discharged liquid 806 is discharged from the liquid discharge ports of the second circulation tank 23 and the third circulation tank 25.
Because the usage amount of the spray liquid required by the bio-trickling filter 21 and the bio-filter 22 is different, the second circulation pump 24 may be operated for a long period of time, and the third circulation pump 26 may be periodically turned on to maintain the first packing layer 214 and the second packing layer 224 at a proper humidity. The waste gas enters the bio-trickling filter 21, and as the second circulating pump 24 operates for a long time, the continuously flowing spraying liquid passes through the first packing layer 214, so that the reaction conditions (such as pH and nutrient concentration) are easy to control, and the substances such as alkane, alkene, monocyclic aromatic hydrocarbon and the like in the waste gas can be effectively removed. The waste gas enters the biological filtering section 22, and degradation reaction can be carried out on the pollutant components with larger Henry coefficients remained in the waste gas.
In order to avoid the drift generated when the exhaust gas passes through the second packing layer 224 after entering the biofiltration section 22, a second aerator 223 may be provided in the biofiltration section 22. The second aerator 223 is connected to the second air inlet 221 and is positioned below the second packing layer 224. It should be noted that, the arrangement of the second aerator 223 may also cause that the amount of the spraying liquid carried in the exhaust gas discharged from the biological filtering section 22 is too large, and further cause that the activated carbon adsorber 3 adsorbs too much spraying liquid to cause waste, and at this time, a person skilled in the art may choose to omit the second aerator 223 according to practical situations, or replace the second aerator 223 with a structure such as a gas distributor, so long as the function of dispersing gas can be achieved.
Demister filler 27 is arranged at the first air outlet 212 of the biological trickling filter section 21 and/or the second air outlet 222 of the biological filter section 22.
A flame arrester 4 is arranged between the biological filtering section 22 and the activated carbon adsorber 3. The arrangement of the flame arrestor 4 can ensure that when inflammable components in the waste gas burn, flames are intercepted when spreading to the activated carbon adsorber 3, explosion of the activated carbon adsorber 3 adsorbed with inflammable organic matters in the waste gas is prevented, and the safety of the whole system is ensured.
As a specific design of this embodiment, the activated carbon adsorber 3 is connected to the exhaust pipe 5. The gas treated by the activated carbon adsorber 3 is discharged through the exhaust pipe 5.
In this embodiment, two activated carbon adsorbers 3 are provided, and the two activated carbon adsorbers 3 are connected in parallel. On the one hand, when one of the activated carbon adsorbers 3 is used for activated carbon regeneration (i.e. eluting the contaminants adsorbed on the activated carbon), the other activated carbon adsorber 3 is used to ensure the operation continuity of the treatment device. On the other hand, the activated carbon adsorbers 3 connected in parallel can also cope with abnormal conditions.
In order to facilitate the reuse of the activated carbon in the activated carbon adsorber 3, the activated carbon adsorber 3 may also be connected to a vacuum pump 7 for regeneration treatment.
The first circulation pump 15, the second circulation pump 24, the third circulation pump 26, and the fan 6 are designed in a manner of two parallel connection, so that the abnormal working condition can be better dealt with.
In the method for using the volatile organic compound-containing waste gas treatment device according to this embodiment, as shown in fig. 3-4, the volatile organic compound-containing waste gas 801 enters the washing tower 1, contacts with the liquid sprayed by the washing spray header 11 at the washing packing layer 12, and removes pollutants soluble in the sprayed liquid, such as particulate matters, heavy oil components, hydrogen sulfide, and the like; the treated exhaust gas passes upward through the demister 13 and is conveyed to the biological tower 2 through the fan 6. Waste gas firstly enters the biological trickling filtration section 21, contacts with spraying liquid through the first aerator 213, then upwards enters the first packing layer 214, and reacts with microorganisms in the first packing layer 214, so that organic matters in the waste gas are degraded; the treated waste gas passes through the demisting filler 27 upwards and then enters the biological filtering section 22, and enters the second filler layer 224 upwards to react with microorganisms in the second filler layer 224, so that organic matters in the waste gas are degraded; the treated exhaust gas passes upward through the demister packing 27 and then enters the activated carbon adsorber 3. The treated exhaust gas is discharged through the exhaust pipe 5.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.
Claims (10)
1. A volatile organic compound-containing exhaust gas treatment device, comprising:
a scrubber (1), the scrubber (1) being adapted to spray a liquid onto a waste gas containing volatile organic compounds, removing contaminants soluble in the spray liquid;
the biological tower (2) is connected with the washing tower (1) through a pipeline and is suitable for receiving the volatile organic compound-containing waste gas treated by the washing tower (1); the biological tower (2) comprises a biological trickling filtration section (21) and a biological filtration section (22) which are sequentially connected in series;
the activated carbon absorber (3) is connected with the biological tower (2) through a pipeline and is suitable for receiving the volatile organic compound-containing waste gas after the biological tower (2) is treated;
wherein, the bottom of the biological trickling filtration section (21) is provided with a first air inlet (211), and the top is provided with a first air outlet (212); a first aerator (213) is arranged in the biological trickling filtration section (21), the first aerator (213) is connected with the first air inlet (211), and a first filler layer (214) is arranged above the first aerator; a first spray header (215) is arranged above the first packing layer (214), and is suitable for spraying liquid to the first packing layer (214) and enabling the falling spray liquid to contact with waste gas discharged by the first aerator (213) after passing through the first packing layer (214);
the bottom of the biological filtering section (22) is provided with a second air inlet (221), and the top of the biological filtering section is provided with a second air outlet (222); a second filler layer (224) is arranged in the biological filter section (22); a second spray header (225) is arranged above the second packing layer (224) and is suitable for spraying liquid to the second packing layer (224);
the first spray header (215) has a spray volume greater than the spray volume of the second spray header (225).
2. The volatile organic compound-containing waste gas treatment device according to claim 1, wherein the scrubber (1) comprises:
the washing spray header (11), the said washing spray header (11) locates the top of the said washing tower (1);
the washing filler layer (12) is arranged below the washing spray header (11) and above the air inlet of the washing tower (1), and is suitable for enabling the waste gas containing volatile organic compounds to contact with liquid sprayed by the washing spray header (11) at the washing filler layer (12).
3. The volatile organic compound-containing waste gas treatment device according to claim 2, characterized in that the scrubber tower (1) further comprises a mist eliminator (13); the demister (13) is arranged between the washing spray header (11) and the air outlet of the washing tower (1).
4. The volatile organic compound-containing exhaust gas treatment device according to claim 2, further comprising:
the liquid inlet of the first circulating liquid tank (14) is connected with a liquid outlet at the bottom end of the washing tower (1), and the liquid outlet of the first circulating liquid tank (14) is connected with the washing spray header (11);
the first circulating pump (15) is arranged between the liquid outlet of the first circulating liquid tank (14) and the washing spray header (11).
5. The volatile organic compound-containing exhaust gas treatment device according to claim 1, further comprising:
the liquid inlet of the second circulating liquid tank (23) is connected with the liquid outlet at the bottom end of the biological trickling filter section (21), and the liquid outlet of the second circulating liquid tank (23) is connected with the first spray header (215);
the second circulating pump (24) is arranged between a liquid outlet of the second circulating liquid tank (23) and the first spray header (215);
the liquid inlet of the third circulating liquid tank (25) is connected with the liquid outlet at the bottom end of the biological filtering section (22), and the liquid outlet of the third circulating liquid tank (25) is connected with the second spray header (225);
and the third circulating pump (26) is arranged between the liquid outlet of the third circulating liquid tank (25) and the second spray header (225).
6. The exhaust gas treatment device containing volatile organic compounds as claimed in claim 5, wherein the second circulation liquid tank (23) and/or the third circulation liquid tank (25) are/is provided with a liquid supplementing port and a gas supplementing port.
7. The volatile organic compound-containing waste gas treatment device according to claim 1, wherein a demister filler (27) is provided at the first gas outlet (212) of the bio-trickling filter (21) and/or at the second gas outlet (222) of the bio-filter (22).
8. The volatile organic compound-containing waste gas treatment device according to claim 1, characterized in that a flame arrester (4) is arranged between the biological filter section (22) and the activated carbon adsorber (3).
9. The volatile organic compound-containing exhaust gas treatment device according to claim 8, characterized in that the activated carbon adsorber (3) is connected to an exhaust gas cartridge (5).
10. The volatile organic compound-containing exhaust gas treatment device according to claim 1, wherein the number of activated carbon adsorbers (3) is two, and the two activated carbon adsorbers (3) are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322167052.5U CN219744429U (en) | 2023-08-11 | 2023-08-11 | Volatile organic compound-containing waste gas treatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322167052.5U CN219744429U (en) | 2023-08-11 | 2023-08-11 | Volatile organic compound-containing waste gas treatment device |
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| Publication Number | Publication Date |
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| CN219744429U true CN219744429U (en) | 2023-09-26 |
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| CN202322167052.5U Active CN219744429U (en) | 2023-08-11 | 2023-08-11 | Volatile organic compound-containing waste gas treatment device |
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| Country | Link |
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| CN (1) | CN219744429U (en) |
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