CN202387241U - Device for purifying and treating high-temperature flue gas containing persistent organic pollutants - Google Patents
Device for purifying and treating high-temperature flue gas containing persistent organic pollutants Download PDFInfo
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- CN202387241U CN202387241U CN2011205124568U CN201120512456U CN202387241U CN 202387241 U CN202387241 U CN 202387241U CN 2011205124568 U CN2011205124568 U CN 2011205124568U CN 201120512456 U CN201120512456 U CN 201120512456U CN 202387241 U CN202387241 U CN 202387241U
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- spray column
- flue gas
- sedimentation basin
- organic pollutants
- temperature flue
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Abstract
The utility model relates to the flue gas purification and treatment technique, and aims to provide a device for purifying and treating high-temperature flue gas containing persistent organic pollutants, which comprises a spraying component and a purifying component. A gas outlet of a secondary spraying tower in the spraying component is sequentially connected with a dehumidifier and multistage plasma reactors via pipelines. The multistage plasma reactors are connected in series. An outlet of a last-stage plasma reactor is connected to an exhaust funnel via a draught fan. The device is capable of effectively treating the high-temperature flue gas containing the persistent organic pollutants, particularly suitable for treating tail gas with high blast volume, high dust load and the persistent organic pollutants and especially suitable for treating the tail gas produced during thermal absorption of solid wastes containing the persistent organic pollutants, and 99.5% of removal efficiency of persistent organics can be achieved. The device for purifying and treating the high-temperature flue gas containing the persistent organic pollutants is low in energy consumption, low in water consumption, free of secondary pollutants, simple in structure, and convenient in mounting and maintenance.
Description
Technical field
The utility model relates to the device that gas cleaning treatment technology, particularly purified treatment contain the persistence organic pollutant high-temperature flue gas, belongs to the environmental protection field.
Background technology
Persistence organic pollutant (Persistent Organic Pollutants; Be called for short POPs) refer to humanly synthetic to be present in lastingly in the environment, accumulate and human health is caused the chemical substance of adverse effect through biological food chain (net), main POPs has dioxin, Polychlorinated biphenyls, organo-chlorine pesticide, hexachloro-benzene etc.POPs has high toxicity, persistence, is easy to assemble in vivo and grow the migration and the deposition of distance.Along with the public to its progressively understanding to environment and health hazard, exigence economy and effective ways are handled these toxicants more.
China has a large amount of soil to suffer the persistence organic pollutant pollution, like the Polychlorinated biphenyls of power industry use, the agrochemical that agricultural production is used.Contaminated soil contains the persistence organic pollutant high-temperature tail gas what the thermal desorption process produced, to its control and treatment measures, is determining the final removal efficient of persistence organic pollutant.For the improvement that contains the persistence organic pollutant high-temperature flue gas, method commonly used both at home and abroad has: solution elution method, active carbon adsorption, molten salt oxidation method, gas chemistry reducing process, base catalysis reducing process etc.The major defect that traditional method for gas purification exists has 2 points: the one, and the cleaning equipment complex structure, construction cost is high, and energy consumption height and operating cost are high, under the higher situation of current energy prices, do not possess good and economic, also are unfavorable for energy-saving and emission-reduction; The 2nd, part technology exists purification efficiency not high, is prone to produce secondary pollution problem, has limited the scope of application and the large-scale promotion of these technologies.
The utility model content
The technical problem that the utility model will solve is, overcomes the weak point of prior art, provides a kind of purified treatment to contain the device of persistence organic pollutant high-temperature flue gas.
The scheme that the utility model solves its technical problem is:
The device that provides a kind of purified treatment to contain the persistence organic pollutant high-temperature flue gas comprises the spray assembly, and said spray assembly comprises the one-level spray column and the secondary spray column of series connection, and the bottom of one-level spray column and secondary spray column all is connected to sedimentation basin through pipeline; Sedimentation basin connects the shower nozzle among water circulating pump, heat exchanger and the Ge Ta successively through pipeline; Said device also comprises purification assembly, and purification assembly comprises: the multistage plasma reactor of dehumidifier, series connection and the high voltage source that is used to supply power; The gas vent of said secondary spray column connects the multistage plasma reactor of dehumidifier and series connection by the road successively, and the outlet of the last grade plasma reactor is connected to aiutage through air-introduced machine.
As a kind of improvement, said plasma reactor is multistage cutter type electrode gliding arc discharge generator.
As a kind of improvement, the progression of said cutter type electrode gliding arc discharge generator is 2～8 grades.
As a kind of improvement, on connection one-level spray column and secondary spray column pipeline, Venturi tube is set.
As a kind of improvement, said secondary spray column is the adjustable type spray column.The adjustable type spray column can be adjusted the spray liquid flow automatically according to front end flue gas flow and temperature.Its internal structure is close with general spray column, and the accurate coupling of end load before mainly realizing through FEEDBACK CONTROL is guaranteeing to reduce the spray liquid use amount as far as possible under the spray condensation efficiency prerequisite.
As a kind of improvement, said dehumidifier is the heating and dehumidification device.
As a kind of improvement, the pipeline of two-stage spray column bottom is connected to the sedimentation basin top, and and the sedimentation basin delivery port between be provided with baffle plate and downflow weir successively; Baffle plate is fixed in sedimentation basin top, and its lower edge is lower than the upper edge of downflow weir.
As a kind of improvement, said one-level spray column and secondary spray column are packed tower.
As a kind of improvement, on the pipeline of said one-level spray column and secondary spray column bottom valve is set respectively.
The processing procedure of installing in the utility model is: will contain one-level spray column and the secondary spray column spraying cooling cooling of persistent organism high-temperature flue gas through series connection, the persistent organism that is condensed gets into sedimentation basin with spray solution; Humid gas behind spray gets into dehumidifier, and the gas after the dehumidifying gets into the multistage plasma reactor of series connection, and persistent organism residual in the gas is degraded.
The beneficial effect of the utility model is:
In the utility model, contain the persistent organism high-temperature flue gas through one-level spray column and the cooling of secondary adjustable type spray column spraying cooling, the above persistent organism of 95% in the flue gas is condensed, and gets into sedimentation basin with spray solution.Humid gas behind the spray gets into dehumidifier, removes most of steam through heating evaporation, and the gas after the dehumidifying gets into multistage gliding arc discharge generator, and the persistent organism of trace is destroyed by high energy electron and active group reaction in the flue gas.After above processing, persistent organism has obtained thorough degraded, and the flue gas after the processing can directly discharge after high efficiency particle air filter filters.Spray solution can be recycled after filtering.Said contain persistence organic pollutant high-temperature flue gas purification treating apparatus have simple in structure, energy consumption is low, persistence organic pollutant is removed characteristics such as thoroughly, not producing secondary pollution, compared with prior art, operating cost reduces more than 50%.
The device that contains persistence organic pollutant high-temperature flue gas purification processing side of the utility model, collection spray, plasma reaction technology are one, can effectively handle containing the persistence organic pollutant high-temperature flue gas; Be specially adapted to big air quantity, high dustiness contains the persistence organic pollutant vent gas treatment, is particularly useful for the processing that persistence organic pollutant pollution solid refuse thermal desorption process produces tail gas.The most of reuse of the water that spray system needs has reduced the system water consumption.Adopted the multiple plasma reactor, the persistence organic pollutant in the spray back tail gas of can fully degrading.For containing the persistent organism high-temperature flue gas, this device can be realized the persistent organism removal efficient more than 99.5%.Persistent organism content can directly discharge far below national standard in the flue gas of processing back.The utility model contain persistence organic pollutant high-temperature flue gas purification treating apparatus, energy consumption is low, the water consumption is little, do not produce secondary pollution, whole apparatus structure is simple, it is convenient that maintenance is installed.
Description of drawings
Fig. 1 is the process flow diagram of the utility model.
Fig. 2 is the utility model dehumidifier structural representation.
Among the figure, 1. the one-level spray column enters the mouth, 2. packing layer, 3. one-level spray column, 4. Venturi tube, 5. secondary adjustable type spray column, 6. dehumidifier; 7. heater, 8. valve, 9. valve, 10. sedimentation basin, 11. baffle plates, 12. downflow weirs, 13. water circulating pumps; 14. valve, 15. valves, 16. plasma reactors, 17. air-introduced machines, 18. aiutages, 19. shower nozzles, 20. shower nozzles; 21. high voltage source, 22. heat exchangers, 23. humid gas imports, the outlet of 24. dry gas, 25. condensers, 26. condensation-water drains.
The specific embodiment
Below in conjunction with accompanying drawing the technology contents and the embodiment of the utility model done a detailed description.
Fig. 1 has provided a cover and has contained persistence organic pollutant high-temperature flue gas purification treating apparatus, is made up of spray assembly and purification assembly.The spray assembly comprises one-level spray column 3, Venturi tube 4, secondary adjustable type spray column 5, valve 8, valve 9, sedimentation basin 10, water circulating pump 13, valve 14, valve 15, shower nozzle 19, shower nozzle 20, and purification assembly comprises dehumidifier 6, plasma reactor 16, high voltage source 21; Said one-level spray column 3 connects Venturi tube 4, and one-level spray column 3 bottoms connect sedimentation basin 10, and valve 8 is used to control the switch of pipeline between one-level spray column 3 and the sedimentation basin 10; Said Venturi tube 4 connects secondary adjustable type spray column 5 said secondary adjustable type spray columns 5 bottoms and connects sedimentation basin 10, and valve 9 is used to control the switch of pipeline between secondary adjustable type spray column 5 and the sedimentation basin 10; Said sedimentation basin 10 connects water circulating pump 13, and said water circulating pump 13 connects shower nozzle 19 and shower nozzle 20, and valve 14 is used to control the switch of pipeline between water circulating pump 13 and the shower nozzle 19, and valve 15 is used to control the switch between water circulating pump 13 and the shower nozzle 20; Said secondary adjustable type spray column 5 connects dehumidifier 6, and said dehumidifier 6 connects plasma reactor 16, and said plasma reactor 16 connects air-introduced machine 17, and said air-introduced machine 17 connects aiutage 18.Plasma reactor 16 is made up of multistage cutter type electrode gliding arc discharge generator series connection, and its each level is a cutter type electrode gliding arc discharge generator.Cutter type electrode gliding arc discharge generator progression can be 2～8 grades according to actual needs.
As shown in Figure 1, contain the persistence organic pollutant high-temperature flue gas through the 1 entering one-level spray column 2 that enters the mouth, contact mixing with spray solution at packing layer 2 places; Flue-gas temperature reduces; Condensation of part persistence organic pollutant and quilt spray liquid carry and get into sedimentation basin 10, and gas gets into secondary adjustable type spray columns 5 through Venturi tube 4 behind first order spray column 3; Flue-gas temperature further reduces, and most persistence organic pollutant is condensed and is carried entering sedimentation basin 10 by spray liquid.Behind the two-stage spray, flue gas is removed steam through dehumidifier 6 heating, and dry flue gas gets into plasma reactor 16.Plasma reactor 16 is in series for multistage cutter type electrode gliding arc discharge generator, and its each level is a cutter type electrode gliding arc discharge generator.Flue gas reacts with high energy electron and active group in plasma reactor 16, realizes the degraded of persistence organic pollutant, and the flue gas after the processing is pumped to aiutage 18 dischargings by air-introduced machine 17.Spray solution in the sedimentation basin 10 is through post precipitation, and supernatant liquor gets into water circulating pump 13 via downflow weir 12, and circulation fluid cools at heat exchanger 22 places, and cooled spray liquid gets into one-level spray column 3 and secondary adjustable type spray column 5 again.
As shown in Figure 2, dehumidifier 6 comprises heater 7, condenser 25, humid gas import 23, dry gas outlet 24, condensation-water drain 26.Humid gas gets into heater 25 through humid gas import 23; Gas is heated to 100-120 ℃ with transpiring moisture; Flue gas behind the heat drying leaves dehumidifier 7 through dry gas outlet 24, and the steam of evaporation is condensed into water droplet through condenser 25, and condensed water is through condensation-water drain 26 dischargings.
Embodiment: the Polychlorinated biphenyls in the cleaning high-temp flue gas (PCBs)
Contain the PCBs high-temperature flue gas through the generation of heating Polychlorinated biphenyls (PCBs) contaminated soil.Flue gas flow is 6m
3/ h, flue-gas temperature is 500 ℃, the PCBs initial content is 44.5mg/m in the flue gas
3
Gas purification process is following: open valve 8, valve 9, valve 14, valve 15, open air-introduced machine 17, open high voltage source 21, open water circulating pump 13.The high-temperature flue gas that contains Polychlorinated biphenyls is through the 1 entering one-level spray column 3 that enters the mouth, and flue gas flow is 6m
3/ h, 2 places are directly mixed with shower water at packing layer, and one-level spray column 3 internal diameters are 108mm; One-level spray column fluid flow is 40L/h, and the persistence organic pollutant in the waste gas is condensed, and gas is behind first order spray column 3; Get into secondary adjustable type spray column 5 through Venturi tube 4, secondary spray column 5 internal diameters are 88mm, and secondary spray column fluid flow is 20L/h; Spray cooling in secondary adjustable type spray column 5, secondary adjustable type spray column 5 backs connect the imports 23 of dehumidifiers 6, heater 7 heated air to 120 ℃; Gas is removed most of steam at heater 7 place's heating evaporations, and the steam of evaporation is discharged from condensation-water drain 26 through condenser 25 condensations; Gas after the dehumidifying gets into plasma reactor 16 through the dry gas outlet 24 of dehumidifier 6, and plasma reactor 16 is 4 grades of cutter type electrode gliding arc discharge generators, and every grade of gliding arc discharge generator length is 300mm; Stainless steel electrode length is 80mm, thick 2mm, and the weakness of positive and negative electrode spacing is 3mm; In plasma reactor 16, react with high energy electron and active group, realize the degraded of persistence organic pollutant, high voltage source 21 is an AC power; Output voltage is 3kv, and electric current is less than 1 ampere, and purified gas is pumped to aiutage 18 dischargings by air-introduced machine 17.
Through detecting, after first order spray column 3 was handled, PCBs content was 14.6mg/m in the flue gas
3After secondary adjustable type spray column 5 was handled, PCBs content was 3.06mg/m in the flue gas
3After plasma reactor 16 was handled, PCBs content was 0.2mg/m in the flue gas
3Can find out that from these data after above processing, PCBs removes efficient and reaches 99.56% in the flue gas, thereby realize the prior art technique effect that is beyond one's reach.
Water cycle process is following: the cold water that comes from water circulating pump 13 gets into shower nozzle 19 through the valve of opening 14; Shower nozzle 19 is positioned at the top of first order spray column 3; Shower water mixes with hot flue gas at packing layer 2; Persistence organic pollutant is condensed, and spray back waste water gets into sedimentation basin 10 through the valve of opening 8; The cold water that comes from water circulating pump 13 gets into shower nozzle 20 through the valve of opening 15, and shower nozzle 20 is positioned at the top of secondary adjustable type spray column 5, and the persistence organic pollutant in the gas is by further condensation, and condensed waste water gets into sedimentation basin 10 through the valve of opening 9.Through post precipitation, the upper strata clear water gets into water circulating pump 13 via downflow weir 12, and recirculated water cools at heat exchanger 22 places, and cooled water gets into valve 14 and valve 15.
At last, what note also is that what more than to enumerate only is a specific embodiment of the utility model.Obviously, this is bright to be not limited to above embodiment, and a lot of distortion can also be arranged.Those of ordinary skill in the art can all should think the protection domain of the utility model from all distortion that the disclosed content of the utility model directly derives or association goes out.
Claims (9)
1. a purified treatment contains the device of persistence organic pollutant high-temperature flue gas; Comprise the spray assembly; It is characterized in that said spray assembly comprises the one-level spray column and the secondary spray column of series connection, the bottom of one-level spray column and secondary spray column all is connected to sedimentation basin through pipeline; Sedimentation basin connects the shower nozzle among water circulating pump, heat exchanger and the Ge Ta successively through pipeline; Said device also comprises purification assembly, and purification assembly comprises: the multistage plasma reactor of dehumidifier, series connection and the high voltage source that is used to supply power; The gas vent of said secondary spray column connects the multistage plasma reactor of dehumidifier and series connection by the road successively, and the outlet of the last grade plasma reactor is connected to aiutage through air-introduced machine.
2. device according to claim 1 is characterized in that, said plasma reactor is multistage cutter type electrode gliding arc discharge generator.
3. device according to claim 2 is characterized in that, the progression of said cutter type electrode gliding arc discharge generator is 2～8 grades.
4. according to the device described in any one of the claim 1 to 3, it is characterized in that, Venturi tube is set connecting on one-level spray column and the secondary spray column pipeline.
5. according to the device described in any one of the claim 1 to 3, it is characterized in that said secondary spray column is the adjustable type spray column.
6. according to the device described in any one of the claim 1 to 3, it is characterized in that said dehumidifier is the heating and dehumidification device.
7. according to the device described in any one of the claim 1 to 3, it is characterized in that the pipeline of two-stage spray column bottom is connected to the sedimentation basin top, and and the sedimentation basin delivery port between be provided with baffle plate and downflow weir successively; Baffle plate is fixed in sedimentation basin top, and its lower edge is lower than the upper edge of downflow weir.
8. according to the device described in any one of the claim 1 to 3, it is characterized in that said one-level spray column and secondary spray column are packed tower.
9. according to the device described in any one of the claim 1 to 3, it is characterized in that, on the pipeline of said one-level spray column and secondary spray column bottom valve is set respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205124568U CN202387241U (en) | 2011-12-11 | 2011-12-11 | Device for purifying and treating high-temperature flue gas containing persistent organic pollutants |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205124568U CN202387241U (en) | 2011-12-11 | 2011-12-11 | Device for purifying and treating high-temperature flue gas containing persistent organic pollutants |
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| Publication Number | Publication Date |
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| CN202387241U true CN202387241U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205124568U Expired - Lifetime CN202387241U (en) | 2011-12-11 | 2011-12-11 | Device for purifying and treating high-temperature flue gas containing persistent organic pollutants |
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| CN (1) | CN202387241U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500126A (en) * | 2011-12-11 | 2012-06-20 | 浙江大学 | Method and device for purifying high-temperature smoke containing persistent organic pollutants |
| CN103272838A (en) * | 2013-05-27 | 2013-09-04 | 浙江大学 | Method and device for repairing contaminated soil with persistent organic pollutants |
| CN103331298A (en) * | 2013-07-12 | 2013-10-02 | 苏州绿地土壤修复科技有限公司 | Soil restoring method and system thereof |
| CN105907412A (en) * | 2016-06-22 | 2016-08-31 | 青岛婧瑶工贸有限公司 | Dry distillation type smoke-free carbonizing furnace and method of same for carbonizing firewood |
-
2011
- 2011-12-11 CN CN2011205124568U patent/CN202387241U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500126A (en) * | 2011-12-11 | 2012-06-20 | 浙江大学 | Method and device for purifying high-temperature smoke containing persistent organic pollutants |
| CN103272838A (en) * | 2013-05-27 | 2013-09-04 | 浙江大学 | Method and device for repairing contaminated soil with persistent organic pollutants |
| CN103331298A (en) * | 2013-07-12 | 2013-10-02 | 苏州绿地土壤修复科技有限公司 | Soil restoring method and system thereof |
| CN103331298B (en) * | 2013-07-12 | 2015-10-07 | 苏州绿地土壤修复科技有限公司 | A kind of rehabilitating soil method and system thereof |
| CN105907412A (en) * | 2016-06-22 | 2016-08-31 | 青岛婧瑶工贸有限公司 | Dry distillation type smoke-free carbonizing furnace and method of same for carbonizing firewood |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120822 |