CN203319834U - Ultrasonic sludge dewatering system - Google Patents
Ultrasonic sludge dewatering system Download PDFInfo
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- CN203319834U CN203319834U CN2013203057089U CN201320305708U CN203319834U CN 203319834 U CN203319834 U CN 203319834U CN 2013203057089 U CN2013203057089 U CN 2013203057089U CN 201320305708 U CN201320305708 U CN 201320305708U CN 203319834 U CN203319834 U CN 203319834U
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Abstract
The utility model relates to an ultrasonic sludge dewatering system, comprising a plurality of sludge concentrating tanks, wherein the sludge outlets of the plurality of sludge concentrating tanks are connected with a sludge inlet of an ultrasonic baffled reactor through the same pipeline; the sludge outlet of the ultrasonic baffled reactor is connected with a sludge inlet of a centrifugal separator through a pipeline; an ultrasonic generator and an ultrasonic transducer which are matched with each other are arranged inside a shell of the ultrasonic baffled reactor; the sludge concentrating tanks remove a part of water out of the sludge by using the gravity concentration principle and simultaneously collect generated oil slick; and the ultrasonic baffled reactor can crush the sludge entering the ultrasonic baffled reactor into relatively complete and small grains by virtue of ultrasonic wave vibration, and the grains are continuously crushed or collided and bonded into new grains under ultrasonic action, so that the internal structure of the sludge is adjusted; internal bound water is released and then three-phase separation of oil, sludge and water can be realized through the separation of the centrifugal separator, so that the moisture content of the finally discharged sludge can be controlled to be below 80%.
Description
Technical field
The utility model relates to a kind of sludge dewatering system, relates in particular to a kind of ultra-sonic dehydration system that refinery sludge is processed that is applied to.
Background technology
" three mud " (biochemical sludge, air supporting scum silica frost and oil trap bed mud that the Petrochemical Enterprises sewage disposal produces, hereinafter to be referred as " three mud ") is as dangerous solid waste, and the key of processing is in minimizing, and centrifuge dehydration is the gordian technique of processing " three mud ".Dewatering process at present commonly used adopts sedimentation concentration+centrifuge technical process, and in order to improve dehydrating effect, mud adds flocculation agent before entering whizzer.Wherein the main slurry tank that adopts of sedimentation concentration dehydration, utilize gravity principle, relies on the muddy water density difference to realize that solid phase is concentrated.The mud of discharging enters centrifuge, after mud is sent into the centrifuge rotating cylinder by hollow rotating shaft, under the centrifugal action produced at high speed rotating, is dumped into immediately in the rotary drum chamber.Mud granule proportion is larger, thereby the centrifugal force produced is also large, is got rid of and is attached on drum inner wall, forms solid layer, and water-mass density is little, and centrifugal force is also little, only at the inboard liquid level that produces of solid layer.The mud of solid layer, under the slow promotion of spiral conveyer, is transported to the cone end of rotary drum, and the outlet around rotary drum is discharged continuously, and liquid is drained into outside rotary drum by the weir plate overflow, collects rear discharge water extracter.In order to improve dehydrating effect, usually before centrifugal import, add flocculation agent, utilize flocculation agent and sludge reaction to form flco and improve the centrifuge dehydration effect.
Refinery sludge oil, mud, water three-phase mixture that normally biological sludge and oily sludge form.Oil increases sludge system viscosity, free settling not, simultaneously sludge formation water-in-oil, oil-in-water emulsified system, higher in conjunction with water-content, adopt sedimentation+centrifugal dewatering technology, water is more difficult to spin off from mud, costs and poor dehydration results.
The utility model content
For overcoming the above-mentioned defect of prior art, the purpose of this utility model is to provide a kind of Sludge by Ultrasonic dewatering system, can realize oil, mud, water three phase separation, and the mud extraction water ratio can be controlled in below 80%.
The technical solution adopted in the utility model is: a kind of Sludge by Ultrasonic dewatering system, comprise several sludge concentrating pots, the sludge outlet of several sludge concentrating pots connects the mud entrance of baffling ultrasonic reactor by same pipeline, the sludge outlet of described baffling ultrasonic reactor connects the mud entrance of separating centrifuge by pipeline, be provided with the ultrasonic generator and the ultrasonic transducer that cooperatively interact in the housing of described baffling ultrasonic reactor.
Can be provided with several horizontally disposed dividing plates in the housing of described baffling ultrasonic reactor, the inner chamber of described baffling ultrasonic reactor evenly is separated into to a plurality of conversion zones, the edge of described dividing plate is connected with the inner wall sealing of housing, can be provided with a breach of heart depression wherein on the edge of described dividing plate, preferably, breach on any two adjacent described dividing plates lays respectively at the both sides of the axis of housing, the entrance and exit of the conversion zone that formation is formed by the inwall of two described dividing plates and housing, all can be provided with a set of ultrasonic generator cooperatively interacted and ultrasonic transducer in each described conversion zone, position is positioned at the below of the outlet of this conversion zone.
Preferably, the mud entrance of described baffling ultrasonic reactor is arranged on the sidewall or diapire of the conversion zone bottom in its housing, the position arranged and the outlet of this conversion zone lay respectively at the both sides of the axis of housing, the sludge outlet of described baffling ultrasonic reactor is arranged on the conversion zone sidewall or roof of the top in its housing, the position arranged and the entrance of this conversion zone lay respectively at the both sides of the axis of housing, and the sludge outlet of described baffling ultrasonic reactor is as the outlet of the conversion zone of the top in its housing.
Can be provided with flocculation agent on pipeline between the mud entrance of the sludge outlet of described baffling ultrasonic reactor and described separating centrifuge and add mouth, or be communicated with the flocculation agent adding tube.
Pump can be provided with on pipeline between the mud entrance of the sludge outlet of described sludge concentrating pot and described baffling ultrasonic reactor, on the pipeline between the mud entrance of the sludge outlet of described baffling ultrasonic reactor and described separating centrifuge, pump can be provided with.
Described sludge concentrating pot can comprise tank body, can be provided with mud entrance and water outlet on the sidewall of described tank body, described mud entrance can be positioned at the below of described water outlet, bottom in described tank body can be provided with and extend to the outer shore pipe of described tank body, form the sludge outlet of described sludge concentrating pot, the upper surface that described shore pipe is positioned at the part of described tank body can be provided with several through holes, and the top in described tank body can be provided with heating tube.
Middle part in described tank body can be provided with vertical flow deflector, the rear and front end of described flow deflector can be fixedly connected with the inwall of described tank body respectively, described flow deflector can comprise the section of tilting, vertical section and the section of having a down dip three parts, preferably, on described vertical section axis that is arranged on described tank body, the described section of tilting is contrary with the vergence direction of the section of having a down dip, described mud entrance and water outlet lay respectively at the both sides of described flow deflector, the vergence direction of the described section of having a down dip is identical with flowing to of the mud entered from described mud entrance, the vergence direction of the described section of tilting is contrary with the flow direction of the water flowed out from described water outlet.
Can be provided with collection tank in described tank body, be positioned at the described section of a tilting side along inclined direction, the entrance preferred levels of the described collection tank 5-10 ° that is inclined upwardly, the outlet of described collection tank can connect by extending to the outer oil exit pipe of described tank body the entrance of recovery of oil tank.
Described separating centrifuge can be the horizontal centrifugal separating machine, be provided with sludge outlet and water outlet, the water outlet of several described sludge concentrating pots can be connected same rising pipe with the water outlet of described separating centrifuge, and the outlet of described rising pipe can connect sewage disposal device.
Preferably, the mud entrance of at least one in several described sludge concentrating pots connects the biological sludge source, and the mud entrance of at least one in several described sludge concentrating pots connects the oily sludge source.
The beneficial effects of the utility model: the high frequency oscillation signal that the ultrasonic generator in the baffling ultrasonic reactor produces converts high frequency machinery Sasser to via ultrasonic transducer and propagates in the mud solution entered in the baffling ultrasonic reactor, ultrasonic wave in mud solution density interphase ground to previous irradiation, make the liquid-flow in reactor produce ten hundreds of small bubbles, these bubbles form at the negative pressuren zone of ultrasonic wave longitudinal propagation, growth, and at the zone of positive pressure rapid closing, the bubble closed ultra-high voltage that forms of moment continuously impacts mud, the mud flco is broken for relatively complete with ultrasonic vibration, less mud granule, and then continue broken under ultrasonication or mutually collide, be bonded into new mud granule, the internal structure of mud has obtained adjustment, inner discharges in conjunction with water, by the centrifugation of separating centrifuge, utilize the muddy water density difference that muddy water is separated again.Be provided with oil recovery apparatus (collection tank) in sludge concentrating pot, reduce the viscosity of mud after mixing when reducing the oil-contg that enters the mud in baffling ultrasonic reactor and separating centrifuge, recovery part oil when improving centrifugal effect, have certain economic implications.The utility model can be realized oil, mud, water three phase separation, and the water ratio of mud extraction can be controlled in below 80%.
The accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the present utility model;
Fig. 2 is the structural representation of baffling ultrasonic reactor of the present utility model;
Fig. 3 is the structural representation of sludge concentrating pot of the present utility model.
Embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3, the utility model provides a kind of Sludge by Ultrasonic dewatering system, comprise several sludge concentrating pots 1, the sludge outlet of several sludge concentrating pots connects the mud entrance of baffling ultrasonic reactor 2 by same pipeline, the sludge outlet of described baffling ultrasonic reactor connects the mud entrance of separating centrifuge 3 by pipeline, be provided with the ultrasonic generator and the ultrasonic transducer 4 that cooperatively interact in the housing of described baffling ultrasonic reactor.
Can be provided with several horizontally disposed dividing plates 5 in the housing of described baffling ultrasonic reactor, the inner chamber of described baffling ultrasonic reactor evenly is separated into to a plurality of conversion zones, the edge of described dividing plate is connected with the inner wall sealing of housing, can be provided with a breach 6 of heart depression wherein on the edge of described dividing plate, preferably, the set-up mode of several described dividing plates in described baffling ultrasonic reactor is the both sides that the breach on any two adjacent described dividing plates lays respectively at the axis of housing, optimally, the breach of a described dividing plate is arranged on an end of the vertical section of housing, the breach of the described dividing plate that another is adjacent is arranged on the other end of the same vertical section of housing, the entrance and exit of the conversion zone that formation is formed by the inwall of these two described dividing plates and housing, the mud homomergic flow that makes to enter conversion zone from the entrance of any one conversion zone after whole conversion zone again from the outflow of the outlet of this conversion zone, all can be provided with a set of ultrasonic generator cooperatively interacted and ultrasonic transducer in each described conversion zone, position is positioned at the below of the outlet of this conversion zone.
Preferably, the mud entrance 7 of described baffling ultrasonic reactor is arranged on the sidewall or diapire of the conversion zone bottom in its housing, form the entrance of this conversion zone, the position arranged and the outlet of this conversion zone lay respectively at the both sides of the axis of housing, optimally, lay respectively at the two ends of the same vertical section of housing, the sludge outlet 8 of described baffling ultrasonic reactor is arranged on the sidewall or roof of conversion zone of the top in its housing, the position arranged and the entrance of this conversion zone lay respectively at the both sides of the axis of housing, optimally, lay respectively at the two ends of the same vertical section of housing, the sludge outlet of described baffling ultrasonic reactor is as the outlet of the conversion zone of the top in its housing.
During described baffling ultrasonic reactor work, the high frequency oscillation signal that its inner ultrasonic generator produces converts high frequency machinery Sasser to via the ultrasonic transducer supporting with it and propagates into from described sludge concentrating pot and enter the mud of described baffling ultrasonic reactor, ultrasonic wave in mud solution density interphase ground to previous irradiation, make the liquid-flow in mud and produce ten hundreds of small bubbles, these bubbles form at the negative pressuren zone of ultrasonic wave longitudinal propagation, growth, and at the zone of positive pressure rapid closing, the bubble closed ultra-high voltage that forms of moment continuously impacts mud, the mud flco is broken for relatively complete with ultrasonic vibration, less mud granule, and then continue broken under ultrasonication or mutually collide, be bonded into new mud granule, the internal structure of mud has obtained adjustment, inner disengages in conjunction with water.Described baffling ultrasonic reactor is divided into a plurality of conversion zones, and be equipped with a set of ultrasonic generator and ultrasonic transducer in each conversion zone, make to enter its inner mud by these zones the time from the entrance of described baffling ultrasonic reactor, can continuous several times be subject to hyperacoustic impact, the disengaging in conjunction with water that is conducive to mud inside, the entrance and exit of each conversion zone lays respectively at the two ends of the same vertical section of housing, effectively extended the flowing through channel of mud in described baffling ultrasonic reactor, extended the attack time of ultrasonic wave for mud.
Can be provided with flocculation agent on pipeline between the mud entrance of the sludge outlet of described baffling ultrasonic reactor and described separating centrifuge and add mouth, or be communicated with flocculation agent adding tube 9.
Disengage in conjunction with the mud of water and adding from flocculation agent mouthful or the flocculation agent adding tube enters separating centrifuge adding flocculation agent, by centrifugation, utilize the muddy water density difference that muddy water is separated.
Can be provided with pump 10 on pipeline between the mud entrance of the sludge outlet of described sludge concentrating pot and described baffling ultrasonic reactor, can be provided with pump 10 on pipeline between the mud entrance of the sludge outlet of described baffling ultrasonic reactor and described separating centrifuge, be used to mud mobile in system that power is provided.
Described sludge concentrating pot can be the horizontal flow concentration tank, comprise tank body, can be provided with mud entrance 11 and water outlet 12 on the sidewall of described tank body, described mud entrance can be positioned at the below of described water outlet, bottom in described tank body can be provided with and extend to the outer shore pipe 13 of described tank body, form the sludge outlet of described sludge concentrating pot, the upper surface that described shore pipe is positioned at the part of described tank body can be provided with several through holes, the mud of being convenient to sedimentation in tank body enters described shore pipe, top in described tank body can be provided with heating tube 14, be used to the mud heating in described sludge concentrating pot.
Preferably, the mud entrance of at least one in several described sludge concentrating pots connects the biological sludge source, the mud entrance of at least one in several described sludge concentrating pots connects the oily sludge source, so that it is concentrated that the biological sludge that refinery factory is produced and oily sludge carry out respectively gravity settling, the horizontal flow concentration tank can guarantee that feed liquor is evenly distributed, and can take full advantage of space raising mud thickening efficiency.
Middle part in described tank body can be provided with vertical flow deflector, the rear and front end of described flow deflector can be fixedly connected with the inwall of described tank body respectively, to fix the position of described flow deflector in described tank body, described flow deflector can comprise the section of tilting 15, vertical section 16 and the section of having a down dip 17 3 parts, the bottom of the described section of tilting connects the top of described vertical section, the bottom of described vertical section connects the top of the described section of having a down dip, leave space between the top of the top of the described section of tilting and the inwall of described tank body, leave space between the bottom of the bottom of the described section of having a down dip and the inwall of described tank body, can pass through for mud, preferably, on described vertical section axis that is arranged on described tank body, the inner chamber of described tank body evenly is divided into to two portions, the described section of tilting is contrary with the vergence direction of the section of having a down dip, described mud entrance and water outlet lay respectively at the both sides of described flow deflector, the vergence direction of the described section of having a down dip is identical with flowing to of the mud entered from described mud entrance, the vergence direction of the described section of tilting is contrary with the flow direction of the water flowed out from described water outlet.
Can be provided with collection tank 18 in described tank body, be positioned at the described section of a tilting side along inclined direction, be convenient to reclaim the part oil in mud, reduce the viscosity of mud when reducing the oil-contg of the follow-up mud that enters described separating centrifuge, also there is certain economic implications when improving centrifugal effect, the entrance preferred levels of the described collection tank 5-10 ° that is inclined upwardly, as 5 °, 6 °, 7 °, 8 °, 9 ° or 10 °, the outlet of described collection tank can connect by extending to the outer oil exit pipe of described tank body 19 entrance of recovery of oil tank 20.
Enter the mud of described sludge concentrating pot under the effect of described flow deflector, sewage current in mud are divided into the mixed flow of horizontal flow and Vertical Flow, under the guiding distributional effects of the section of having a down dip of described flow deflector, mud sinks, sewage is walked around described flow deflector and is moved upward, before and after simultaneously described flow deflector, there are difference in the flow velocity of mud and the mainbody flow speed of sewage, thereby increased the probability of the diameter particle collision that varies in size, the part small-particle becomes macrobead, promoted the sinking of mud, the concentrated mud that sinks is discharged described sludge concentrating pot via described shore pipe.Oil in mud is at the effect float downward of the section of tilting of described flow deflector, under the effect of current, flow in the collection tank of side of the described section of tilting, the entrance level of described collection tank is inclined upwardly, make it can extend in oil reservoir, guarantee to receive oily effect, the oil that described collection tank is collected is in described oil exit pipe drains into the recovery of oil tank.Water in tank body is discharged by described water outlet.
Described separating centrifuge can be the horizontal centrifugal separating machine, be provided with sludge outlet 21 and water outlet 22, the water outlet of several described sludge concentrating pots can be connected same rising pipe 23 with the water outlet of described separating centrifuge, and the outlet of described rising pipe can connect sewage disposal device.
Principle of work of the present utility model is: biological sludge and oily sludge that refinery factory produces enter respectively different sludge concentrating pots, utilize the gravity concentration principle, deviate from part water, collect the oil slick produced in sludge concentrating pot simultaneously, be expelled to the recovery of oil tank, recycled.Mud after sludge concentrating pot is processed enters the baffling ultrasonic reactor under the effect of pump, the ultrasonic wave of utilizing ultrasonic generator to produce is converted to the mechanical energy of high frequency oscillation via ultrasonic transducer, the mud flco is broken for relatively complete, less mud granule with ultrasonic vibration, and then continue fragmentation or mutually collide, be bonded into new mud granule under ultrasonication, the internal structure of mud is adjusted, and inner disengages in conjunction with water.The mud that the baffling ultrasonic reactor is discharged enters separating centrifuge under the effect of pump, add flocculation agent on pipeline before entering separating centrifuge, form flco, centrifugation by separating centrifuge is separated muddy water, and the sewage that sludge concentrating pot and separating centrifuge produce is sent into Sewage treatment systems and processed.The utility model can be realized the three phase separation of oil, mud, water, and the water ratio of final mud extraction can be controlled in below 80%.
Claims (10)
1. a Sludge by Ultrasonic dewatering system, comprise several sludge concentrating pots, the sludge outlet that it is characterized in that several sludge concentrating pots connects the mud entrance of baffling ultrasonic reactor by same pipeline, the sludge outlet of described baffling ultrasonic reactor connects the mud entrance of separating centrifuge by pipeline, be provided with the ultrasonic generator and the ultrasonic transducer that cooperatively interact in the housing of described baffling ultrasonic reactor.
2. Sludge by Ultrasonic dewatering system as claimed in claim 1, it is characterized in that being provided with several horizontally disposed dividing plates in the housing of described baffling ultrasonic reactor, the inner chamber of described baffling ultrasonic reactor evenly is separated into to a plurality of conversion zones, the edge of described dividing plate is connected with the inner wall sealing of housing, the edge of described dividing plate is provided with a breach of heart depression wherein, breach on any two adjacent described dividing plates lays respectively at the both sides of the axis of housing, the entrance and exit of the conversion zone that formation is formed by the inwall of two described dividing plates and housing, be equipped with a set of ultrasonic generator cooperatively interacted and ultrasonic transducer in each described conversion zone, position is positioned at the below of the outlet of this conversion zone.
3. Sludge by Ultrasonic dewatering system as claimed in claim 2, the mud entrance that it is characterized in that described baffling ultrasonic reactor is arranged on the sidewall or diapire of the conversion zone bottom in its housing, the position arranged and the outlet of this conversion zone lay respectively at the both sides of the axis of housing, the sludge outlet of described baffling ultrasonic reactor is arranged on the sidewall or roof of conversion zone of the top in its housing, the position arranged and the entrance of this conversion zone lay respectively at the both sides of the axis of housing, the sludge outlet of described baffling ultrasonic reactor is as the outlet of the conversion zone of the top in its housing.
4. Sludge by Ultrasonic dewatering system as claimed in claim 3, is characterized in that pipeline between the mud entrance of the sludge outlet of described baffling ultrasonic reactor and described separating centrifuge is provided with flocculation agent and adds mouthful, or be communicated with the flocculation agent adding tube.
5. Sludge by Ultrasonic dewatering system as claimed in claim 4, it is characterized in that the pipeline between the mud entrance of the sludge outlet of described sludge concentrating pot and described baffling ultrasonic reactor is provided with pump, the pipeline between the mud entrance of the sludge outlet of described baffling ultrasonic reactor and described separating centrifuge is provided with pump.
6. as claim 1,2,3,4 or 5 described Sludge by Ultrasonic dewatering systems, it is characterized in that described sludge concentrating pot comprises tank body, the sidewall of described tank body is provided with mud entrance and water outlet, described mud entrance is positioned at the below of described water outlet, bottom in described tank body is provided with and extends to the outer shore pipe of described tank body, form the sludge outlet of described sludge concentrating pot, the upper surface that described shore pipe is positioned at the part of described tank body is provided with several through holes, and the top in described tank body is provided with heating tube.
7. Sludge by Ultrasonic dewatering system as claimed in claim 6, it is characterized in that the middle part in described tank body is provided with vertical flow deflector, the rear and front end of described flow deflector is fixedly connected with the inwall of described tank body respectively, described flow deflector comprises the section of tilting, vertical section and the section of having a down dip three parts, on described vertical section axis that is arranged on described tank body, the described section of tilting is contrary with the vergence direction of the section of having a down dip, described mud entrance and water outlet lay respectively at the both sides of described flow deflector, the vergence direction of the described section of having a down dip is identical with flowing to of the mud entered from described mud entrance, the vergence direction of the described section of tilting is contrary with the flow direction of the water flowed out from described water outlet.
8. Sludge by Ultrasonic dewatering system as claimed in claim 7, it is characterized in that being provided with collection tank in described tank body, be positioned at the described section of a tilting side along inclined direction, the entrance level of the described collection tank 5-10 ° that is inclined upwardly, the outlet of described collection tank connects the entrance of recovery of oil tank by extending to the outer oil exit pipe of described tank body.
9. Sludge by Ultrasonic dewatering system as claimed in claim 8, it is characterized in that described separating centrifuge is the horizontal centrifugal separating machine, be provided with sludge outlet and water outlet, the water outlet of several described sludge concentrating pots is connected same rising pipe with the water outlet of described separating centrifuge, the outlet of described rising pipe connects sewage disposal device.
10. Sludge by Ultrasonic dewatering system as claimed in claim 9, it is characterized in that at least one the mud entrance in several described sludge concentrating pots connects the biological sludge source, the mud entrance of at least one in several described sludge concentrating pots connects the oily sludge source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203057089U CN203319834U (en) | 2013-05-30 | 2013-05-30 | Ultrasonic sludge dewatering system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203057089U CN203319834U (en) | 2013-05-30 | 2013-05-30 | Ultrasonic sludge dewatering system |
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| CN203319834U true CN203319834U (en) | 2013-12-04 |
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| CN2013203057089U Expired - Lifetime CN203319834U (en) | 2013-05-30 | 2013-05-30 | Ultrasonic sludge dewatering system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107434350A (en) * | 2017-09-04 | 2017-12-05 | 福建清道夫环保科技有限公司 | A kind of sludge water process reaction of high order waste gas dust-removal device |
| CN108863013A (en) * | 2017-05-12 | 2018-11-23 | 中国石油化工股份有限公司 | Containing poly- Sludge by Ultrasonic processing unit and method |
| CN112876036A (en) * | 2021-02-23 | 2021-06-01 | 扬州阿鲁达环境科技有限公司 | Ultrasonic-based oily sludge treatment system and process |
-
2013
- 2013-05-30 CN CN2013203057089U patent/CN203319834U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108863013A (en) * | 2017-05-12 | 2018-11-23 | 中国石油化工股份有限公司 | Containing poly- Sludge by Ultrasonic processing unit and method |
| CN107434350A (en) * | 2017-09-04 | 2017-12-05 | 福建清道夫环保科技有限公司 | A kind of sludge water process reaction of high order waste gas dust-removal device |
| CN112876036A (en) * | 2021-02-23 | 2021-06-01 | 扬州阿鲁达环境科技有限公司 | Ultrasonic-based oily sludge treatment system and process |
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Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: China National Petroleum Corp. Patentee after: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. Address before: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee before: China National Petroleum Corp. Patentee before: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. |
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| CX01 | Expiry of patent term |
Granted publication date: 20131204 |
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| CX01 | Expiry of patent term |