CN204543615U - A kind of industrial continuous used oil process distillation equipment - Google Patents
A kind of industrial continuous used oil process distillation equipment Download PDFInfo
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- CN204543615U CN204543615U CN201520237015.XU CN201520237015U CN204543615U CN 204543615 U CN204543615 U CN 204543615U CN 201520237015 U CN201520237015 U CN 201520237015U CN 204543615 U CN204543615 U CN 204543615U
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- 238000004821 distillation Methods 0.000 title claims abstract description 55
- 239000010913 used oil Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008676 import Effects 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 9
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 31
- 238000001816 cooling Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000003670 easy-to-clean Effects 0.000 abstract description 4
- 238000010304 firing Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 91
- 239000003513 alkali Substances 0.000 description 4
- 238000010924 continuous production Methods 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 239000004317 sodium nitrate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The utility model relates to a kind of industrial continuous used oil process distillation equipment, the distillation equipment production cost that effectively can solve used oil is high, poor safety performance, not easy to clean and service life short problem, technical scheme is, material tank outlet is connected with the import of oil circulating pump with the oil-out on Residual Oil Tank top respectively, recycle oil delivery side of pump is connected with the import of heating oil pipe in distillation still, in distillation still, the outlet of heating oil pipe is connected with the import of fractionating column bottom, the oil-out of fractionating column lower end is connected with the cavity of Residual Oil Tank, form feedstock circulation add-on system, the outlet on fractionating column top is connected with the import of rectifying column, rectifying column is provided with from top to bottom and organizes outlet more, the outlet of top is provided with the first oil system, the outlet of each rectifying column below the first oil system is provided with the second identical oil system, the utility model novel structure is unique, advantages of simple, firing rate is fast, low-carbon environment-friendly, safe and reliable, long service life, oil quality is good.
Description
Technical field
The utility model relates to used oil distillation equipment, particularly a kind of industrial continuous used oil process distillation equipment.
Background technology
Used oil refers to the waste lubricating oil changed from various Ji Xie ﹑ Che Liang ﹑ boats and ships.The various vehicle of China monthly needs the machine oil changed just to have millions of ton, the used oil overwhelming majority changed is outwelled on the spot or burns, not only waste ample resources but also cause serious environmental pollution, for head it off, realize changing waste into resources and utilize, the existing multiple used oil distillation equipment to using in the processing method of used oil, due to its structural problem, result of use is all unsatisfactory, mainly there is following problem: 1, can not realize industrial continuous production, production cost is high; 2, the kettle of distillation still is in naked light high temperature for a long time and directly burns state, easy oxygen distortion, and distillation kettle is short for service life; 3, as equipment goes wrong, heat energy supply can not be cut off in time, poor safety performance; 4, equipment can not heated at constant temperature, the fuel oil poor quality of distillation gained; 5, distillation pipeline is often stained with wall blocking, not easy to clean; 6, equipment is meet the requirement of environmental protection, often larger in dust pelletizing system investment; 7, distillation after waste gas directly burn, cause the defects such as energy dissipation, therefore, its innovation and improve imperative.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the object of the utility model is just to provide a kind of industrial continuous used oil process distillation equipment, and the distillation equipment production cost that effectively can solve used oil is high, poor safety performance, not easy to clean and service life short problem.
The technical scheme that the utility model solves is, comprise material tank, fractionating column, rectifying column and distillation still, material tank outlet is connected with the import of oil circulating pump with the oil-out on Residual Oil Tank top respectively, recycle oil delivery side of pump is connected with the import of heating oil pipe in distillation still, in distillation still, the outlet of heating oil pipe is connected with the import of fractionating column bottom, the oil-out of fractionating column lower end is connected with the cavity of Residual Oil Tank, form feedstock circulation add-on system, the outlet on fractionating column top is connected with the import of rectifying column, rectifying column is provided with from top to bottom and organizes outlet more, the outlet of top is provided with the first oil system, the outlet of each rectifying column below the first oil system is provided with the second identical oil system, first oil system comprises the first condenser group, surge tank, first transfer oil tank and the first oil pump, the outlet of rectifying column top is connected with the import of the first condenser group, the outlet of the first condenser group is connected with the import of surge tank, the oil-out of surge tank is connected with the import of the first oil pump through the first transfer oil tank, first oily delivery side of pump is connected with the import of rectifying column, structure being aligned oil return-flow system, second oil system comprises the second condenser group, second transfer oil tank and the second oil pump, the import of each outlet second condenser group corresponding thereto of rectifying column bottom is connected, the outlet of the second condenser group is connected with the import of the second oil pump through the second transfer oil tank, the gas outlet of the upper end of surge tank is connected with the import of oil-gas storage tank with the import of heater combustion chamber respectively through water-stop, heat transfer cycle pipeline is provided with in the combustion chamber of heater, the import of heat transfer cycle pipeline is connected with the export and import of distillation still inner chamber respectively with outlet, form the long-range heating arrangement of distillation still, heat-conducting medium in heat transfer cycle pipeline transfers heat to the heating oil pipe in distillation still, the oil temperature in heating oil pipe is made steadily to increase, distillation still does not contact naked light, guarantee that kettle oxidation is little, substantially increase service life of equipment, the outlet of oil-gas storage tank is connected with gas electricity generator, forms gas power generation system.
The utility model novel structure is unique, advantages of simple, and firing rate is fast, low-carbon environment-friendly, safe and reliable, and long service life, oil quality are good, have good Social and economic benef@.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.
Provided by Fig. 1, the utility model comprises material tank, fractionating column, rectifying column and distillation still, material tank 8 exports and is connected with the import of oil circulating pump 2 with the oil-out 4a on Residual Oil Tank 4 top respectively, the outlet of oil circulating pump 2 is connected with the import of heating oil pipe in distillation still 3, in distillation still 3, the outlet of heating oil pipe is connected with the import 5a of fractionating column 5 bottom, the oil-out of fractionating column lower end is connected with the cavity of Residual Oil Tank 4, form feedstock circulation add-on system, the outlet 5b on fractionating column 5 top is connected with the import 15e of rectifying column 15, rectifying column 15 is provided with from top to bottom and organizes outlet more, the outlet 15a of top is provided with the first oil system, the outlet of each rectifying column below the first oil system is provided with the second identical oil system, first oil system comprises the first condenser group, surge tank 20, first transfer oil tank 22 and the first oil pump 23, the outlet 15a of rectifying column 15 top is connected with the import of the first condenser group, the outlet of the first condenser group is connected with the import of surge tank 20, the oil-out of surge tank 20 is connected through the import of the first transfer oil tank 22 with the first oil pump 23, the outlet of the first oil pump 23 is connected with the import 15b of rectifying column 15, structure being aligned oil return-flow system, second oil system comprises the second condenser group, second transfer oil tank and the second oil pump, the import of each outlet second condenser group corresponding thereto of rectifying column 15 bottom is connected, the outlet of the second condenser group is connected with the import of the second oil pump through the second transfer oil tank, the gas outlet of the upper end of surge tank 20 is connected with the import of oil-gas storage tank 42 with the import of heater 1 combustion chamber respectively through water-stop 21, heat transfer cycle pipeline is provided with in the combustion chamber of heater 1, the import of heat transfer cycle pipeline is connected with the export and import of distillation still 3 inner chamber respectively with outlet, form the long-range heating arrangement of distillation still 3, heat-conducting medium in heat transfer cycle pipeline transfers heat to the heating oil pipe in distillation still, the oil temperature in heating oil pipe is made steadily to increase, distillation still does not contact naked light, guarantee that kettle oxidation is little, substantially increase service life of equipment, the outlet of oil-gas storage tank 42 is connected with gas electricity generator 41, forms gas power generation system.
For ensureing result of use, the exhanst gas outlet of described heater 1 successively through two spray columns 11 of series connection, 12, adsorption tower 13 is connected with the import of air-introduced machine 14, pond 9 is connected with the import of spray column through water pump 10, the outlet of spray column is connected with the import in pond 9, form flue gas purification system, described spray column 11,12 is built with stainless steel Pall ring filler, and adsorption tower 13 is built with sponge active carbon.
The second described condenser group is connected with the outlet of water cooling pond 39 through water supply pump 37,38 with one end of the condensate circulation pipeline of the second condenser group, the other end is connected with the import of cooling tower 40, the outlet of cooling tower 40 is connected with water cooling pond, forms oil gas cooling recirculation system.
The second described oil system has two groups; As shown in the figure, the outlet 15c of rectifying column 15 is connected with the import of the second condenser group (being made up of the condenser 24,25,26,27 of connecting), the outlet of the second condenser group is connected through the import of the second transfer oil tank 28 with the second oil pump 29, the outlet 15d of rectifying column 15 is connected with the import of the second condenser group (being made up of the condenser 31,32,33,34 of connecting), and the outlet of the second condenser group is connected through the import of the second transfer oil tank 35 with the second oil pump 36; The first described condenser group is made up of the condenser 16,17,18,19 of connecting;
Described Residual Oil Tank 4 is built with liquid level sensor; The oil-out 4b of described Residual Oil Tank 4 bottom is connected with the import of heavy resid tank 7.
Distillation still is hollow structure, the heating oil pipe that tubulose is arranged is provided with in the cavity of distillation still, heating oil pipe outside falling heat-transfer medium in the cavity of distillation still, heat transfer cycle pipeline distillation still is equipped with, heat transfer cycle pipeline stretches in the combustion chamber of heater, also falling heat-transfer medium in heat transfer cycle pipeline, heat-conducting medium transfers heat to the heating oil pipe in distillation still, the oil temperature in heating oil pipe is made steadily to increase, distillation still does not contact naked light, guarantee that kettle oxidation is little, substantially increase service life of equipment; Described heat-conducting medium can transferring heat;
This heat-conducting medium is prior art, as can ternary molten salt be adopted, the mixed nitrate of ternary molten salt i.e. 53% potassium nitrate, 40% natrium nitrosum, 7% sodium nitrate composition, its fusing point is at 142 degrees Celsius, gasification point 500 degrees Celsius, more than 450 degrees Celsius, natrium nitrosum just can produce slow decomposing phenomenon, and operating temperature of the present utility model is at 250-430 degree Celsius;
Service condition of the present utility model is, the feedstock oil that material tank is 8 li enters the heating oil pipe in distillation still cavity through oil circulating pump, heat-conducting medium transfers heat to the heating oil pipe in distillation still, the oil temperature in heating oil pipe is made steadily to increase heating, add thermogenetic oil gas and enter fractionating column, part oil gas directly enters rectifying column from the outlet 5b on top, another part oil gas enters Residual Oil Tank 4, Residual Oil Tank is equipped with liquid level sensor, reach a certain amount of rear stopping and taking out feedstock oil, the oil changed into oil circulating pump is taken out in Residual Oil Tank circulates, oil in Residual Oil Tank distill a certain amount of after change into again and take out feedstock oil, circulate according to this, heater makes the oil temperature of heating tube steadily rise by heat-conducting medium, distillation still does not contact naked light, guarantee that kettle oxidation is little, substantially increase service life of equipment, the oil gas of rectifying column is entered through fractionating column, controlled by temperature, oil gas enters the first oil system and the second oil system respectively, be condensed into liquid-fuel oil, flow into the first transfer oil tank 22 respectively, second transfer oil tank 28, 35, again respectively through the first oil pump 23, second oil pump 29, 36 outer rows, fuel gas can not be coagulated under the uncooled oil gas of part and normal temperature and pressure, the combustion chamber combustion heating of heater is entered after being communicated with surge tank above transfer oil tank and water shut off treatment, exhaustless gas enters in gas electricity generator 41 through oil-gas storage tank, burning produces electric energy, electric energy required for subsequent production process, the electric energy that gas electricity generator produces thus provides,
Fuel gas can not be coagulated enter the flue gas that heater 1 heats rear generation and enter spray column, the alkali lye pumped with water pump 10 mixes (being mixed with alkali lye in pond 9), alkaline matter now in alkali lye and the acidic materials generation acid-base neutralization in flue gas react, and reach the object removing flue gas middle acid substance.Flue gas, after acid-base neutralization, by the remaining alkali lye in the stainless steel Pall ring filler removing flue gas in spray column 11,12, flows back in pond 9;
Cooling water in cooling pond 39 enters the import of the first condenser group and the second condenser group condensate circulation pipeline respectively by water supply pump, then flow back in cooling pond 39 again after its outlet enters cooling tower 40 respectively, circulate in production process always, realize the industrial continuous production of used oil recycling;
The utility model adopts long-range heating arrangement to heat fractioning pipestill, and effectively can improve the security of equipment, compared with prior art, the utility model has the following advantages:
1, in overall heating process, fractioning pipestill does not contact naked light, guarantees that fractioning pipestill oxidation is little, substantially increases service life of equipment;
2, heater adopts the fine-tuning firing rate of heat-conducting medium, achieves the object of controllable temperature heating, substantially improves the quality of obtained clean fuel oil;
3, achieve industrial continuous production, substantially reduce production cost, improve working environment and the labour intensity of workman;
4, have employed heat-conducting medium heating, firing rate is fast, and environment friendly and pollution-free, oil yield is high;
5, after the waste gas that distillation produces enters oil-gas storage tank, available gas electricity generator generates electricity;
6, distill water back and be not stained with wall, easy to clean, substantially increasing plant maintenance efficiency, is the innovation in used oil distillation equipment, has good economic and social benefit.
Applicant it is to be noted; each parts all in the application are existing commercially available prod (known technology); the utility model innovation is combining they science; form the industrial continuous used oil process distillation equipment with novelty; the application is above-mentioned, and what point out is only a kind of embodiment; be not meant to limit the protection domain of the application, every use be equal to or be equal to alternative means make the protection domain that the technical scheme identical in essence with technical scheme all belong to the application.
Claims (6)
1. an industrial continuous used oil process distillation equipment, comprise material tank, fractionating column, rectifying column and distillation still, it is characterized in that, material tank (8) outlet is connected with the import of oil circulating pump (2) with the oil-out (4a) on Residual Oil Tank (4) top respectively, the outlet of oil circulating pump (2) is connected with the import of heating oil pipe in distillation still (3), in distillation still (3), the heating outlet of oil pipe is connected with the import (5a) of fractionating column (5) bottom, the oil-out of fractionating column lower end is connected with the cavity of Residual Oil Tank (4), form feedstock circulation add-on system, the outlet (5b) on fractionating column (5) top is connected with the import (15e) of rectifying column (15), rectifying column (15) is provided with from top to bottom organizes outlet more, the outlet (15a) of top is provided with the first oil system, the outlet of each rectifying column below the first oil system is provided with the second identical oil system, first oil system comprises the first condenser group, surge tank (20), first transfer oil tank (22) and the first oil pump (23), the outlet (15a) of rectifying column (15) top is connected with the import of the first condenser group, the outlet of the first condenser group is connected with the import of surge tank (20), the oil-out of surge tank (20) is connected with the import of the first oil pump (23) through the first transfer oil tank (22), the outlet of the first oil pump (23) is connected with the import (15b) of rectifying column (15), structure being aligned oil return-flow system, second oil system comprises the second condenser group, second transfer oil tank and the second oil pump, the import of each outlet second condenser group corresponding thereto of rectifying column (15) bottom is connected, the outlet of the second condenser group is connected with the import of the second oil pump through the second transfer oil tank, the gas outlet of the upper end of surge tank (20) is connected with the import of oil-gas storage tank (42) with the import of heater (1) combustion chamber respectively through water-stop (21), heat transfer cycle pipeline is provided with in the combustion chamber of heater (1), the import of heat transfer cycle pipeline is connected with the export and import of distillation still (3) inner chamber respectively with outlet, form the long-range heating arrangement of distillation still (3), heat-conducting medium in heat transfer cycle pipeline transfers heat to the heating oil pipe in distillation still, the oil temperature in heating oil pipe is made steadily to increase, distillation still does not contact naked light, guarantee that kettle oxidation is little, substantially increase service life of equipment, the outlet of oil-gas storage tank (42) is connected with gas electricity generator (41), forms gas power generation system.
2. industrial continuous used oil process distillation equipment according to claim 1, it is characterized in that, the exhanst gas outlet of described heater (1) is connected with the import of air-introduced machine through two spray columns (11,12) of series connection, adsorption tower (13) successively, pond (9) is connected with the import of spray column through water pump (10), the outlet of spray column is connected with the import of pond (9), form flue gas purification system, described spray column (11,12) is built with stainless steel Pall ring filler, and adsorption tower (13) is built with sponge active carbon.
3. industrial continuous used oil process distillation equipment according to claim 1, it is characterized in that, the second described condenser group is connected with the outlet of water cooling pond (39) through water supply pump (37,38) with one end of the condensate circulation pipeline of the second condenser group, the other end is connected with the import of cooling tower (40), the outlet of cooling tower (40) is connected with water cooling pond, forms oil gas cooling recirculation system.
4. industrial continuous used oil process distillation equipment according to claim 1, it is characterized in that, the second described oil system has two groups.
5. industrial continuous used oil process distillation equipment according to claim 1, is characterized in that, described Residual Oil Tank (4) is built with liquid level sensor.
6. industrial continuous used oil process distillation equipment according to claim 1, is characterized in that, the oil-out (4b) of described Residual Oil Tank (4) bottom is connected with the import of heavy resid tank (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520237015.XU CN204543615U (en) | 2015-04-20 | 2015-04-20 | A kind of industrial continuous used oil process distillation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520237015.XU CN204543615U (en) | 2015-04-20 | 2015-04-20 | A kind of industrial continuous used oil process distillation equipment |
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| Publication Number | Publication Date |
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| CN204543615U true CN204543615U (en) | 2015-08-12 |
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| CN201520237015.XU Expired - Fee Related CN204543615U (en) | 2015-04-20 | 2015-04-20 | A kind of industrial continuous used oil process distillation equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104774680A (en) * | 2015-04-20 | 2015-07-15 | 商丘金蓬实业股份有限公司 | Industrial continuous waste oil treatment distillation equipment |
| CN108441252A (en) * | 2018-03-28 | 2018-08-24 | 商丘中清环保科技有限公司 | Cryogenic distillation apparatus |
| CN108441251A (en) * | 2018-03-28 | 2018-08-24 | 商丘中清环保科技有限公司 | Cryogenic distillation process |
-
2015
- 2015-04-20 CN CN201520237015.XU patent/CN204543615U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104774680A (en) * | 2015-04-20 | 2015-07-15 | 商丘金蓬实业股份有限公司 | Industrial continuous waste oil treatment distillation equipment |
| CN104774680B (en) * | 2015-04-20 | 2018-06-05 | 商丘金蓬实业股份有限公司 | Industrial continuous used oil handles distillation equipment |
| CN108441252A (en) * | 2018-03-28 | 2018-08-24 | 商丘中清环保科技有限公司 | Cryogenic distillation apparatus |
| CN108441251A (en) * | 2018-03-28 | 2018-08-24 | 商丘中清环保科技有限公司 | Cryogenic distillation process |
| CN108441251B (en) * | 2018-03-28 | 2021-02-23 | 商丘中清环保科技有限公司 | Cryogenic distillation process |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 |
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| CF01 | Termination of patent right due to non-payment of annual fee |