CN104548901A - Integrated treating method for plastic pelletization waste gas - Google Patents
Integrated treating method for plastic pelletization waste gas Download PDFInfo
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- CN104548901A CN104548901A CN201410847183.0A CN201410847183A CN104548901A CN 104548901 A CN104548901 A CN 104548901A CN 201410847183 A CN201410847183 A CN 201410847183A CN 104548901 A CN104548901 A CN 104548901A
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Abstract
The invention relates to an integrated treating method for plastic pelletization waste gas. The treating method comprises the following steps: adopting ozone and waste gas to be in full contact; conducting oxidation treatment on the waste gas; conducting ultraviolet light illumination on the gas after oxidation treatment for degradation treatment; adopting an acid mist purification tower and alkali absorption liquid to purify the gas after ultraviolet degradation treatment; conducting activated charcoal adsorption treatment. The treating method is remarkable in treating effect, has excellent oxygenolysis and absorption capacity to plastic pelletization waste gas, saves occupied land, reduces energy consumption and cost, and has a relatively high application effect.
Description
Technical field
The invention belongs to discarded north material and utilize technical field, be specifically related to a kind of plastic granulating plastic granulating waste gas processing method.
Background technology
Along with improving constantly of plastics demand, waste plastic also increases gradually, and the process problem of plastic garbage is the large difficult point of one in current environmental treatment.Carrying out recycling to waste plastic is a kind of not only environmental protection but also economic way.Present stage, China's waste plastics recovery technology, still based on physiochemical mutagens, is recycled operation and is mainly collection, taxonomic revision, cleaning, drying, broken granulation, makes the product or used in combination with virgin material of the suitable market demand through modification reprocessing.
Carrying out recycling to discarded the first day of the lunar month material is a kind of not only environmental protection but also economic way, and it comprises Physical and chemical method.Physical is undertaken waste plastic again to use on the parts such as industry and building industry after processing is pulverized by machinery exactly.Chemical method comprises melting regeneration, thermal cracking and energy regenerating etc.Chemical method is the new direction that north material is recycled, and mainly comprises the oiling technology of plastics, coking technology and manufactures aromatic compound.The raw material monomer major part of plastics comes from oil, and oil is non-renewable energy resources, and plastics are carried out oiling process not only can protection of the environment but also can reach the object of fuel-economizing.But no matter be melting regeneration, thermal cracking, energy regenerating or burning, these methods all be unable to do without high-temperature process.
In waste plastic regenerating and pelleting process, when temperature is more than 200 DEG C, the low boiling impurity of plasticizer and inside thereof, oxidation Decomposition can be there is, the waste gas produced mainly comprises the band compounds frowzy such as dust, the fragrant same clan, amine, hydrogen sulfide, phenols, aldehydes, acid, alkali, unsaturated hydro carbons, cause the plastic waste band of gas to have a kind of foul odour, the local ecological environment of severe contamination, brings harm to nearby residents and health and safety.
Given this, the present invention spy proposes a kind of processing method of plastic granulating waste gas.
Summary of the invention
Object of the present invention is just the deficiency overcoming prior art existence, provides a kind of processing method of plastic granulating waste gas of integration.
Object of the present invention realizes by one of following technical scheme.
A kind of processing method of plastic granulating waste gas of integration, it adopts ozone fully to contact with waste gas, oxidation processes is carried out to waste gas, gas after oxidation processes adopts ultraviolet lighting to carry out degradation treatment again, gas after UV degradation process adopts acid mist purifying tower and alkaline absorption solution to purify again, finally carries out charcoal absorption process again.
Further optimization, forming S shape gas passage by arranging multiple deflection plate, making fully contacting between waste gas with ozone.
Further optimization, adopt gas distributor to receive ultraviolet lighting with making gas uniform processing stage of UV degradation.
Further optimization, described packing layer is Raschig ring, Pall ring, cascade ring or ripple packing.
Further optimization, in alkaline absorption solution, bubbling process is carried out by arranging gas distributor in acid mist purifying tower, gas carries out the rotary spray process of the first order more afterwards, gas contacts with the packing layer be located on air distribution plate after contacting with vaporific absorbing liquid again, above air distribution plate, also carry out the rotary spray process in the second level simultaneously, gas is contacted with absorbing liquid further, and then enter after demister demist absorption step in active carbon carry out adsorption treatment.
Further optimization, the processing method of the plastic granulating waste gas of described a kind of integration, adopt as lower device processes, comprise oxidizing tower, acid mist purifying tower and adsorption tower successively according to the handling process of waste gas, three towers are integrated; Exhaust gas inlet is provided with bottom oxidizing tower, oxidizing tower comprises the ozone oxidation section for carrying out ozone oxidation to waste gas and the UV degradation section for carrying out UV degradation to waste gas, UV degradation section top is provided with ozone oxidation gas distributor, is communicated with between ozone oxidation section and UV degradation section by the first central wireway; Be communicated with by the second central wireway between acid mist purifying tower with UV degradation section, acid mist purifying tower bottom is provided with UV degradation gas distributor, acid mist purifying top of tower is provided with demister, is provided with acid mist purifying gas distributor, is provided with spray equipment below demister above demister; Acid mist air distribution plate is provided with in acid mist purifying tower, acid mist air distribution plate is provided with packing layer, and spray equipment is connected with liquid supplying apparatus, and acid mist purifying tower bottom is provided with liquid outlet, liquid outlet connects liquid handling device, and liquid handling device is connected with liquid supplying apparatus; Be communicated with by the 3rd central wireway between adsorption tower with acid mist purifying tower, be provided with pure qi (oxygen) outlet bottom adsorption tower, in adsorption tower, be provided with adsorbent; Adopt multilayer deflection plate structure in oxidizing tower, form tortuous baffling passage, form passage between adjacent two deflection plates, each deflection plate all has one end to be connected with oxidizing tower sidewall, and the other end and between oxidizing tower sidewall does not leave gap; In acid mist purifying tower, the nozzle of spray equipment is towards contrary with gas flow direction, the spray liquid that UV degradation gas distributor is arranged in acid mist purifying tower bottom storage carries out one-level bubbling, also be provided with another spray equipment below acid mist air distribution plate, spray equipment is connected with liquid supplying apparatus.
Compared with prior art, tool of the present invention has the following advantages and technique effect:
Integrated treatment of the present invention can save occupation of land, advanced treating can be carried out to plastic granulating waste gas, there is multi-level, heterogeneous associated treatment effect, to plastic granulating waste gas, there is good oxidation Decomposition, absorbability, structural design is conducive to reducing energy consumption, the advantage reduced costs.
Accompanying drawing explanation
Fig. 1 is the treating apparatus schematic diagram (horizontal) adopted in embodiment.
Fig. 2 is the another kind of Flash Gas Compression Skid System schematic diagram (vertical) adopted in embodiment.
Detailed description of the invention
Below in conjunction with accompanying drawing, specific embodiment of the invention is described further, but enforcement of the present invention and protection are not limited thereto.
A kind of integrated plastic granulation waste gas processing method, it adopts ozone fully to contact with waste gas, oxidation processes is carried out to waste gas, gas after oxidation processes adopts ultraviolet lighting to carry out degradation treatment again, gas after UV degradation process adopts acid mist purifying tower and alkaline absorption solution to purify again, finally carries out charcoal absorption process again.
The treating apparatus that the method for this example is adopted by this example shown in Fig. 1 or Fig. 2 according to the handling process of waste gas comprise successively oxidizing tower 3, acid mist purifying tower 7 and adsorption tower 15, three tower be integrated; Exhaust gas inlet 1 is provided with bottom oxidizing tower, oxidizing tower comprises the ozone oxidation section 2 for carrying out ozone oxidation to waste gas and the UV degradation section 6 for carrying out UV degradation to waste gas, UV degradation section 6 top is provided with ozone oxidation gas distributor 5, is communicated with between ozone oxidation section 2 and UV degradation section 6 by the first central wireway; Be communicated with by the second central wireway between acid mist purifying tower 7 with UV degradation section 6, UV degradation gas distributor 8 is provided with bottom acid mist purifying tower 7, acid mist purifying tower 7 top is provided with demister 13, be provided with acid mist purifying gas distributor 12 above demister 13, below demister 13, be provided with spray equipment 11; Acid mist air distribution plate 9 is provided with in acid mist purifying tower 7, acid mist air distribution plate 9 is provided with packing layer 10, spray equipment 11 is connected with liquid supplying apparatus 18, liquid outlet is provided with bottom acid mist purifying tower 7, liquid outlet connects liquid handling device 17(can be provided with lime, precipitation, filtration reactant etc.), liquid handling device 17 supplies absorbing liquid with liquid supplying apparatus 18() be connected; Be communicated with by the 3rd central wireway between adsorption tower 15 with acid mist purifying tower 7, be provided with pure qi (oxygen) outlet 16 bottom adsorption tower 15, in adsorption tower 15, be provided with adsorbent.As an example, described acid mist purifying tower can adopt bubble column body, and the air inlet of acid mist purifying tower and adsorption tower is equipped with gas distributor.
As an example, described spray equipment 11 sprays alkaline absorption solution, as sodium hydroxide solution.
As an example, in adsorption tower 15, the adsorbent 14 of filling adopts and selects active carbon.
As an example, the treating apparatus of the plastic granulating waste gas of this integration is vertical and horizontal type structure.As Fig. 2, draw together oxidizing tower 3, acid mist purifying tower 7 and adsorption tower 15 3 tower in vertical structure and be integrated from the bottom to top successively; As Fig. 1, in horizontal type structure oxidizing tower 3, acid mist purifying tower 7 and adsorption tower 15 3 tower successively lateral arrangement be integrated.
As an example, ozone oxidation gas distributor 5 is connected with the first central wireway; UV degradation gas distributor 8 is connected with the second central wireway; Acid mist purifying gas distributor 12 is connected with the central wireway of third two.Described packing layer is Raschig ring, Pall ring, cascade ring or ripple packing.As an example, the pure qi (oxygen) outlet of described adsorption tower also can be provided with plastic granulating wasted nickel catalyst device.
As an example, adopt multilayer deflection plate structure in oxidizing tower, form tortuous baffling passage and realize mixing of plastic granulating waste gas and ozone, between adjacent two deflection plates, form passage, each deflection plate all has one end to be connected with oxidizing tower sidewall, and the other end and between oxidizing tower sidewall does not leave gap.In acid mist purifying tower, the nozzle of spray equipment 11 is towards contrary with gas flow direction, the spray liquid that UV degradation gas distributor 8 is arranged in acid mist purifying tower bottom storage carries out one-level bubbling, also be provided with another spray equipment (secondary spray) below acid mist air distribution plate 9, spray equipment is connected with liquid supplying apparatus 18.Spray head simultaneously by controlling spray equipment rotates, and gas is contacted more abundant with adsorption liquid.
As an example, in acid mist purifying tower, spray equipment 11 is single-stage spray, and in adsorption tower 15, double-layer active carbon selected by the adsorbent of filling.
As shown by arrows in FIG., waste gas enters oxidizing tower by exhaust gas inlet, respectively after ozone and UV degradation, enters acid mist purifying tower by central wireway; Rear waste gas, after gas distributor and spray equipment, enters adsorption tower by central wireway and acid mist purifying tower gas distributor successively, finally discharges from pure qi (oxygen) outlet.
Claims (6)
1. the processing method of an integrated plastic granulating waste gas, it is characterized in that adopting ozone fully to contact with waste gas, oxidation processes is carried out to waste gas, gas after oxidation processes adopts ultraviolet lighting to carry out degradation treatment again, gas after UV degradation process adopts acid mist purifying tower and alkaline absorption solution to purify again, finally carries out charcoal absorption process again.
2. the processing method of the plastic granulating waste gas of a kind of integration according to claim 1, is characterized in that forming S shape gas passage by arranging multiple deflection plate, making fully contacting between waste gas with ozone.
3. the processing method of the plastic granulating waste gas of a kind of integration according to claim 1, adopts gas distributor to receive ultraviolet lighting with making gas uniform processing stage of it is characterized in that UV degradation.
4. the processing method of the plastic granulating waste gas of a kind of integration according to claim 1, is characterized in that described packing layer is Raschig ring, Pall ring, cascade ring or ripple packing.
5. the processing method of the plastic granulating waste gas of a kind of integration according to claim 1, it is characterized in that in alkaline absorption solution, carrying out bubbling process by arranging gas distributor in acid mist purifying tower, gas carries out the rotary spray process of the first order more afterwards, gas contacts with the packing layer be located on air distribution plate after contacting with vaporific absorbing liquid again, above air distribution plate, also carry out the rotary spray process in the second level simultaneously, gas is contacted with absorbing liquid further, and then enter after demister demist absorption step in active carbon carry out adsorption treatment.
6. the processing method of the plastic granulating waste gas of a kind of integration according to claim 1, it is characterized in that adopting as lower device processes, comprise oxidizing tower (3), acid mist purifying tower (7) and adsorption tower (15) successively according to the handling process of waste gas, three towers are integrated; Exhaust gas inlet (1) is provided with bottom oxidizing tower, oxidizing tower comprises the ozone oxidation section (2) for carrying out ozone oxidation to waste gas and the UV degradation section (6) for carrying out UV degradation to waste gas, UV degradation section (6) top is provided with ozone oxidation gas distributor (5), is communicated with between ozone oxidation section (2) and UV degradation section (6) by the first central wireway; Be communicated with by the second central wireway between acid mist purifying tower (7) with UV degradation section (6), acid mist purifying tower (7) bottom is provided with UV degradation gas distributor (8), acid mist purifying tower (7) top is provided with demister (13), demister (13) top is provided with acid mist purifying gas distributor (12), and demister (13) below is provided with rotating spraying shower device (11); Acid mist air distribution plate (9) is provided with in acid mist purifying tower (7), acid mist air distribution plate (9) is provided with packing layer (10), spray equipment (11) is connected with liquid supplying apparatus (18), acid mist purifying tower (7) bottom is provided with liquid outlet, liquid outlet connects liquid handling device (17), and liquid handling device (17) is connected with liquid supplying apparatus (18); Be communicated with by the 3rd central wireway between adsorption tower (15) with acid mist purifying tower (7), adsorption tower (15) bottom is provided with pure qi (oxygen) outlet (16), and adsorption tower is provided with adsorbent in (15); Adopt multilayer deflection plate structure in oxidizing tower, form tortuous baffling passage, form passage between adjacent two deflection plates, each deflection plate all has one end to be connected with oxidizing tower sidewall, and the other end and between oxidizing tower sidewall does not leave gap; In acid mist purifying tower, the nozzle of spray equipment (11) is towards contrary with gas flow direction, the spray liquid that UV degradation gas distributor (8) is arranged in acid mist purifying tower bottom storage carries out one-level bubbling, acid mist air distribution plate (9) below is also provided with another rotating spraying shower device, and spray equipment is connected with liquid supplying apparatus (18).
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105381677A (en) * | 2015-12-11 | 2016-03-09 | 天紫工程管理（天津）有限公司 | Waste plastic granulation exhaust gas treatment system |
| CN106178882A (en) * | 2016-09-09 | 2016-12-07 | 成都九十度工业产品设计有限公司 | Ozone and the liquid collector of waste gas mixing reactor |
| CN106178618A (en) * | 2016-09-09 | 2016-12-07 | 成都九十度工业产品设计有限公司 | A kind of precipitation still for processing Metallurgical Waste Water |
| CN106215658A (en) * | 2016-09-26 | 2016-12-14 | 自贡市星星科技有限公司 | Waste gas Environmental-protecting treater |
| CN106861390A (en) * | 2017-01-17 | 2017-06-20 | 长兴益莱科环保科技有限公司 | A kind of emission-control equipment of recycled plastic granules production process |
| CN108404630A (en) * | 2018-03-07 | 2018-08-17 | 重庆庚业新材料科技有限公司 | Waste plastic granulation exhaust treatment system and method |
| CN110115923A (en) * | 2019-05-06 | 2019-08-13 | 上海坦泽环保科技有限公司 | It is a kind of for examining the technique of testing laboratory's exhaust-gas treatment |
| CN110248683A (en) * | 2016-12-22 | 2019-09-17 | 肤之梦有限公司 | Powder puff sterilizing unit |
| CN110314654A (en) * | 2019-07-24 | 2019-10-11 | 万华化学集团股份有限公司 | A kind of organic waste-gas adsorbant and preparation method thereof, organic waste gas treatment method |
| CN110538540A (en) * | 2019-09-26 | 2019-12-06 | 南京蓝胜环保科技有限公司 | Water curtain type dust and ammonia removing system and process applying urea granulation tail gas |
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| JP2001137655A (en) * | 1999-11-12 | 2001-05-22 | Fuji Photo Film Co Ltd | Waste gas treating method |
| CN101468285A (en) * | 2007-12-28 | 2009-07-01 | 海斯博特（北京）科技有限公司 | Device for treating volatile organic gaseous contamination |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105381677A (en) * | 2015-12-11 | 2016-03-09 | 天紫工程管理（天津）有限公司 | Waste plastic granulation exhaust gas treatment system |
| CN106178882A (en) * | 2016-09-09 | 2016-12-07 | 成都九十度工业产品设计有限公司 | Ozone and the liquid collector of waste gas mixing reactor |
| CN106178618A (en) * | 2016-09-09 | 2016-12-07 | 成都九十度工业产品设计有限公司 | A kind of precipitation still for processing Metallurgical Waste Water |
| CN106178882B (en) * | 2016-09-09 | 2019-11-19 | 成都九十度工业产品设计有限公司 | The liquid collector of ozone and exhaust gas mixing reactor |
| CN106215658B (en) * | 2016-09-26 | 2019-05-03 | 深圳市东荣环保科技有限公司 | Exhaust gas Environmental-protecting treater |
| CN106215658A (en) * | 2016-09-26 | 2016-12-14 | 自贡市星星科技有限公司 | Waste gas Environmental-protecting treater |
| CN110248683A (en) * | 2016-12-22 | 2019-09-17 | 肤之梦有限公司 | Powder puff sterilizing unit |
| CN106861390A (en) * | 2017-01-17 | 2017-06-20 | 长兴益莱科环保科技有限公司 | A kind of emission-control equipment of recycled plastic granules production process |
| CN108404630A (en) * | 2018-03-07 | 2018-08-17 | 重庆庚业新材料科技有限公司 | Waste plastic granulation exhaust treatment system and method |
| CN110115923A (en) * | 2019-05-06 | 2019-08-13 | 上海坦泽环保科技有限公司 | It is a kind of for examining the technique of testing laboratory's exhaust-gas treatment |
| CN110314654A (en) * | 2019-07-24 | 2019-10-11 | 万华化学集团股份有限公司 | A kind of organic waste-gas adsorbant and preparation method thereof, organic waste gas treatment method |
| CN110314654B (en) * | 2019-07-24 | 2022-03-11 | 万华化学集团股份有限公司 | Organic waste gas adsorbent, preparation method thereof and organic waste gas treatment method |
| CN110538540A (en) * | 2019-09-26 | 2019-12-06 | 南京蓝胜环保科技有限公司 | Water curtain type dust and ammonia removing system and process applying urea granulation tail gas |
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| CN104548901B (en) | 2017-01-04 |
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