CN204039109U - A kind of pole plate is high-density electricity flocculation plant slidably - Google Patents
A kind of pole plate is high-density electricity flocculation plant slidably Download PDFInfo
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- CN204039109U CN204039109U CN201420330465.9U CN201420330465U CN204039109U CN 204039109 U CN204039109 U CN 204039109U CN 201420330465 U CN201420330465 U CN 201420330465U CN 204039109 U CN204039109 U CN 204039109U
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Abstract
The utility model relates to technical field of water purification, be specially a kind of pole plate slidably, the electric flocculation plant of high electrode density.This device does not use fixed card slot, and pole plate can slide along its normal direction, separates between pole plate with plastic cap nut or plastic strip.After all pole plates load shell, utilize the flat air bag being parallel to pole plate to be fixed by pole plate, play the effect stoping water to leak through simultaneously.Compare existing electric flocculation plant, the polar plate spacing of the utility model device reduces greatly, and electrode packing density can be made to increase by 1 ~ 2 times.Increase electrode packing density and reduce polar plate spacing and can increase reaction area, reduce system resistance, be conducive to weakening polarization phenomena, thus improve the problem of the easy passivation of electrode.When treater size and processing power one timing, the utility model can save power consumption 30% ~ 60%, extends electrode life 1 ~ 2 times.The problem such as the utility model can solve that the ubiquitous current consumption of electro-flucculation process is large, the easy passivation of electrode, electrode replacement cycle are short.
Description
Technical field
The utility model relates to technical field of water purification, be specially a kind of pole plate slidably, the electric flocculation plant of high electrode density.
Background technology
Electric flocculation technique, for the treatment of waste water, has the advantages such as treatment effect is good, waste residue amount is few, water quality strong adaptability, can be applicable to the wastewater treatment of multiple industry.Such as: process waste water from plating plant, dressing-works waste water, refinery effluent, paper mill effluent, oil field waste, petrochemical wastewater, textile mills' waste water, slaughterhouse water, food and drink factory waste water, sanitary wastewater, percolate etc.
Electric flocculation technique is used for wastewater treatment and has good application prospect, but the current following problem of electric flocculation plant ubiquity: and 1) electrode surface area is less, and current density is comparatively large, the easy passivation of plate; 2) the plate life-span shorter (being generally not more than 1000 hours), frequent electrode of changing can bring inconvenience, and reduces processing efficiency, increases maintenance cost; 3) operating voltage is higher, current consumption comparatively large (process water current consumption per ton and be generally not less than 1kWh).
Utility model content
The purpose of this utility model is to provide a kind of pole plate slidably high-density electricity flocculation plant, in order to the problem such as solve the current easy passivation of the ubiquitous electrode of electric flocculation plant, current consumption is large, anode life is short.
The technical solution of the utility model is:
A kind of pole plate is high-density electricity flocculation plant slidably, this electric flocculation plant is made up of stainless steel casing and the electrode group being seated in stainless steel casing inside, electrode group is made up of the bipolar electrode between positive plate, negative plate and positive plate, negative plate, be parallel to each other between pole plate, do not use the draw-in groove for fixed polar plate, electrode can slide along the direction perpendicular to pole plate.
Described pole plate is high-density electricity flocculation plant slidably, pole plate be vertically placed on be fixed on the inner stainless steel step of stainless steel casing enhancement type polytetrafluoro pad on, separate with insulating barrier between electrode group and stainless steel casing.
Described pole plate is high-density electricity flocculation plant slidably, and electrode group side is parallel to pole plate and arranges flat air bag, separates between the pole plate of electrode group with plastic cap nut or the plastic strip that is parallel to pole plate; After pole plate has loaded, make the swelling of electrode group to the flat airbag aeration being parallel to pole plate and fix; During dismounting electrode group, the gas in flat air bag is discharged, take out electrode.
Described pole plate is high-density electricity flocculation plant slidably, this electric flocculation plant comprises: positive plate, negative plate, bipolar electrode, stainless steel casing, water outlet, water-in, slag bucket, slag-drip opening, stainless steel step, enhancement type polytetrafluoro pad, flat air bag, insulating barrier, and concrete structure is as follows:
Bottom in stainless steel casing is arranged with stainless steel step, stainless steel step is arranged enhancement type polytetrafluoro pad, electrode group is arranged on the enhancement type polytetrafluoro pad in stainless steel casing, bottom cavity in stainless steel casing is slag bucket, slag bucket bottom surface has slag-drip opening, the side lower of stainless steel casing has water-in, and the side surface upper part of stainless steel casing has water outlet; One in electrode group arranges flat air bag between transverse side and stainless steel casing, positive plate in electrode group, negative plate, bipolar electrode and flat balloon ends are erected on enhancement type polytetrafluoro pad respectively, arrange insulating barrier respectively between the two ends of positive plate, negative plate, bipolar electrode and flat air bag and stainless steel casing.
Design philosophy of the present utility model is:
Key of the present utility model is to avoid the draw-in groove used for fixed polar plate, and the plastic strip adopting plastic cap nut or be parallel to water (flow) direction is to separate pole plate and to keep polar plate spacing.Pole plate is directly vertically placed on the enhanced polytetrafluoroethylene step in treater, can slide along pole plate normal (perpendicular to pole plate) direction.The flat air bag swelling utilizing treater built-in fixed polar plate, separate with plastic cap nut or along the plastic strip of water (flow) direction between pole plate, the thickness of polar plate spacing and plastic cap nut or plastic strip is suitable.
Plastics draw-in groove fixed polar plate generally used by traditional electric flocculation plant, and polar plate spacing limits by draw-in groove, plate material mechanical property and setting accuracy, is generally greater than 5mm.Polar plate spacing to cause greatly between pole plate the shortcomings such as resistance is large, ion diffuse path length, electrode packing density are little, electrode total surface area is little, thus the problems such as operating voltage is high, current consumption is large, the easy passivation of anode, work-ing life are short that cause electric flocculation plant to occur.
The utility model is optimized based on the problems referred to above, devise a kind of Novel electric flocculation plant that can improve the problems such as the easy passivation of the ubiquitous anode of current electric flocculation plant, current consumption is large, electrode life is short, significant for the practicality improving electro-flucculation process further.
Advantage of the present utility model and beneficial effect as follows:
1, the utility model saves fixed card slot, and adopt reinforced TFE step and can the flat air bag of charge, exhaust, pole plate is movable, installs, convenient disassembly.
2, adopt the utility model polar plate spacing can be decreased to 1 ~ 4mm, make operating voltage reduce by 50 ~ 70%, current consumption reduces by 30 ~ 60%.
3, adopt the utility model can increase the surface-area of electrode, reduce the current density of polar board surface, shorten the evolving path of water intermediate ion, increase the relative velocity of water, thus improve polarization of electrode and passivation phenomenon.
4, adopt the utility model can improve electrode packing density 1 ~ 2 times, thus make increase by 1 ~ 2 times the work-ing life of electrode, be conducive to extending the pole plate replacement cycle, improve equipment operating efficiency, reduce maintenance cost.
In a word, the utility model provides a kind of Novel electric flocculation plant, and this device does not use fixed card slot, and pole plate can slide along its normal direction, separates between pole plate with plastic cap nut or plastic strip.After all pole plates load shell, utilize the flat air bag being parallel to pole plate to be fixed by pole plate, play the effect stoping water to leak through simultaneously.Compare existing electric flocculation plant, the polar plate spacing of this device reduces greatly, and electrode packing density can be made to increase by 1 ~ 2 times.Increase electrode packing density and reduce polar plate spacing and can increase reaction area, reduce system resistance, be conducive to weakening polarization phenomena, thus improve the problem of the easy passivation of electrode.When treater size and processing power one timing, the utility model can save power consumption 30% ~ 60%, extends electrode life 1 ~ 2 times.Thus, can solve that the ubiquitous current consumption of electro-flucculation process is large, the problem such as the easy passivation of electrode, electrode replacement cycle are short.
Accompanying drawing explanation
Fig. 1 (a)-Fig. 1 (c) is flocculation plant schematic diagram electric in the utility model.Wherein, Fig. 1 (a) is electrode group schematic diagram; Fig. 1 (b) is front view; Fig. 1 (c) is left view.
Mark in figure: 1-positive plate, 2-negative plate, 3-bipolar electrode, 4-stainless steel casing, 5-water outlet, 6-water-in, 7-slag bucket, 8-slag-drip opening, 9-stainless steel step, 10-enhancement type polytetrafluoro pad, 11-flat air bag, 12-insulating barrier.
Fig. 2 (a)-Fig. 2 (b) adopts different anode material for Novel electric flocculation plant described in the utility model from traditional electrical flocculation plant, processes the current consumption of water per ton during different operating electric current.Wherein, the corresponding conventional apparatus of Fig. 2 (a), polar plate spacing is 8mm; The corresponding new device of Fig. 2 (b), polar plate spacing is 1.2mm.Device all uses the stainless steel square tube of 65 × 65 × 600mm to be that shell is made, and the process water yield is 30L/ hour.
Fig. 3 (a)-Fig. 3 (e) is that the technical parameter of Novel electric flocculation plant and traditional electrical flocculation plant in three embodiments contrasts (in figure, new device refers to the utility model electricity flocculation plant, and conventional apparatus refers to traditional electrical flocculation plant).Wherein, Fig. 3 (a) is operating voltage contrast, the electricity contrast that Fig. 3 (b) consumes for process water per ton, Fig. 3 (c) is plate current density contrast, Fig. 3 (d) is the flow velocity contrast of water in electric flocculation plant, and Fig. 3 (e) is plate contrast in work-ing life.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Fig. 1 (a)-Fig. 1 (c), the utility model is made up of stainless steel casing 4 and the electrode group being seated in stainless steel casing 4 inside for the treatment of the electric flocculation plant of trade effluent, mainly comprise: positive plate 1, negative plate 2, bipolar electrode 3, stainless steel casing 4, water outlet 5, water-in 6, slag bucket 7, slag-drip opening 8, stainless steel step 9, enhancement type polytetrafluoro pad 10, flat air bag 11, insulating barrier 12 etc., concrete structure is as follows:
Electrode group is made up of the bipolar electrode 3 between positive plate 1, negative plate 2 and positive plate 1, negative plate 2, all pole plates are vertically placed on and are fixed on the enhancement type polytetrafluoro pad 10 of stainless steel step 9, be parallel to each other between pole plate, separate with insulating barrier 12 between electrode group and stainless steel casing 4.After pole plate has loaded, inflate so that the swelling of electrode group is also fixing to the flat air bag 11 being parallel to pole plate, separate with plastic cap nut or plastic strip between the pole plate of electrode group.When needing dismounting electrode group, the gas in flat air bag is discharged, can electrode be taken out.Bottom in stainless steel casing 4 is arranged with stainless steel step 9, stainless steel step 9 is arranged enhancement type polytetrafluoro pad 10 (as: carbon fiber reinforced ptfe pad), electrode group is arranged on the enhancement type polytetrafluoro pad 10 in stainless steel casing 4, bottom cavity in stainless steel casing 4 is slag bucket 7, slag bucket 7 bottom surface has slag-drip opening 8, the side lower of stainless steel casing 4 has water-in 6, and the side surface upper part of stainless steel casing 4 has water outlet 5.Between a transverse side in electrode group and stainless steel casing 4, flat air bag 11 is set, positive plate 1 in electrode group, negative plate 2, bipolar electrode 3 and flat air bag 11 two ends are erected on enhancement type polytetrafluoro pad 10 respectively, arrange insulating barrier 12 respectively between the two ends of positive plate 1, negative plate 2, bipolar electrode 3 and flat air bag 11 and stainless steel casing 4.
The utility model does not use the fixed card slot for fixed electorde group pole plate, the pole plate of electrode group can slide along the direction perpendicular to pole plate, pole plate (positive plate 1, negative plate 2, bipolar electrode 3) be vertically placed on enhancement type polytetrafluoro pad 10 is housed stainless steel step 9 on, parallel to each other between pole plate.Adopt and be parallel to flat air bag 11 swelling of pole plate and fixed polar plate, separate, to keep suitable polar plate spacing with plastic cap nut or the plastic strip that is parallel to pole plate between pole plate.After pole plate filling, in flat air bag, inflation can swelling fixed polar plate, and polar plate spacing can be as small as 1 ~ 4mm, and electrode is loaded the comparable common electric flocculation plant of density and improved 1 ~ 2 times.During the work of Novel electric flocculation plant, waste water containing heavy metal ion enters electric flocculation plant from water-in 6, then bottom-uply to flow through between pole plate, heavy metal ion is converted into tiny metal or metal oxide particle under electrochemical action, be combined with the high reactivity oxyhydroxide that positive plate 1 is formed, and be separated from water by the mode of precipitation, reach the object removing heavy metal in water.Finally flow out from water outlet 5, namely complete electrochemical treatment, enter next step operation.The flco major part that electrochemical treatment process produces flows out from water outlet 5 with current, and small part sinks down into slag bucket 7 under gravity, discharges when gathering certain amount from slag-drip opening 8.Whole treating processes does not produce any adverse factor, can discharge after water outlet standing clarification detection is qualified.Wherein,
Presetting pH Neutralization of Industrial Wastewater is 3 ~ 8 (being preferably 5 ~ 7), adopts current density 0.5 ~ 15mA/cm
2(be preferably 1 ~ 8mA/cm
2), polar plate spacing is 1 ~ 4mm (being preferably 1.2 ~ 2mm), the process water yield per hour is 10 ~ 30 times (preferably 15 ~ 20 times) of treater volume, flow rate is 3 ~ 20mm/s (being preferably 5 ~ 15mm/s), and water outlet time of repose is no less than 60min (being preferably 60 ~ 120min).
Device described in the utility model is not obvious in the passivation for the treatment of processes Anodic, and current consumption is little, be only 40 ~ 70% of traditional electrical flocculation plant, the evolving path shortening 30 ~ 80% of current density reduction 40% ~ 60%, water intermediate ion can be made, the relative velocity of water can be made to be enhanced about more than once simultaneously, polarization of electrode and problem of passivation can be improved.Compared with traditional electrical flocculation plant, electrode life can extend 1 ~ 2 times.
In the utility model, iron, aluminium, magnesium and alloy thereof can be selected as anode material, wherein Al alloys andMg alloys with the low trade mark of heavy metal (copper, cadmium, zinc etc.) content as well, such as: Mg99.00, Mg99.50, AZ31,1100,1200 etc.
Embodiment one
With the stainless steel square tube of two 65 × 65 × 600mm for shell, the carbon steel sheet that 2mm is thick is anode and bipolar electrode, and the stainless steel plate that 2mm is thick is negative electrode, makes electric flocculation plant.The volume of non-loading electrode timer is 2L.Make traditional electric flocculation plant (device 1) with a shell, polar plate spacing is 6mm, can fill 7 pole plates.Another shell makes device described in the utility model (device 2), and polar plate spacing is 1.2mm, can fill 19 pole plates.
The original arsenic concentration of certain dressing-works arsenic-containing waste water is 22.3mg/L, processes respectively with device 1 and device 2 to it.Concrete steps are:
After unslaked lime adjust ph to 5, respectively with the speed access to plant 1 of 30L/ hour and device 2, working current is all set to 4A.Now, the operating voltage of device 1 is 5.2V, and plate current density is 3mA/cm
2, flow rate is 3.1mm/s; The operating voltage of device 2 is 3.1V, and plate current density is 1.2mA/cm
2, flow rate is 6.8mm/s.Waste water after device 1 and device 2 process is disposed to settling pond 1 and settling pond 2 respectively, and after 60min leaves standstill, sampling detects the arsenic concentration in water outlet.Detected result shows, under these conditions, device 1 and device 2 all can make the arsenic content in arsenic-containing waste water be down to emission standard (0.5mg/L) below.Wherein, it is 0.11mg/L that device 1 goes out Water jet cleaning, and it is 0.06mg/L that device 2 goes out Water jet cleaning.
As can be seen here, when the unit time process water yield is identical with working current, the arsenic removal performance of device 2 is suitable with the arsenic removal performance of device 1, but the operating voltage of device 2 (3.1V) is starkly lower than the operating voltage (5.2V) of device 1.Accordingly, the current consumption (0.42kwh) that device 2 processes water per ton is also only 60% of device 1.Under these conditions, anode work-ing life of device 1 is 529 hours, and anode work-ing life of device 2 is 1237 hours, and the pole plate replacement cycle of device 2 is 2.34 times of device 1.
Embodiment two
With the stainless steel square tube of two 65 × 65 × 600mm for shell, the magnesium alloy plate (trade mark: AZ31) that 3mm is thick is anode and bipolar electrode, the stainless steel plate that 2mm is thick is negative electrode, the electric flocculation plant (device 3) that making one is traditional respectively and electric flocculation plant described in the utility model (device 4).The volume of non-loading electrode timer is 2L.Device 3 polar plate spacing is 5mm, can fill 7 pole plates.Device 4 polar plate spacing is 1.5mm, can fill 15 pole plates.
In certain refinery effluent, zinc, cadmium exceed standard, and original zinc concentration is 44.7mg/L, and cadmium concentration is 16.9mg/L, and pH value is 3.8, process respectively with device 3 and device 4 to it.Concrete steps are:
Former water is without the direct access to plant 3 of adjust pH and device 4, and water inlet speed is 30L/ hour, and working current is 6A.Now, the operating voltage of device 3 is 4.4V, and plate current density is 4.5mA/cm
2, flow rate is 3.6mm/s; The operating voltage of device 4 is 2.9V, and plate current density is 2.2mA/cm
2, flow rate is 5.9mm/s.Waste water after device 3 and device 4 process is disposed to settling pond 3 and settling pond 4 respectively, and after 60min leaves standstill, sampling detects zinc, cadmium concentration in water outlet.Detected result shows, zinc, the cadmium concentration value of device 3 water outlet are respectively 0.3mg/L and 0.08mg/L, and zinc, the cadmium concentration value of device 4 water outlet are respectively 0.44mg/L and 0.07mg/L, all meet emission standard.
As can be seen here, when the unit time process water yield is identical with working current, dezincification, the cadmium performance of the dezincification of device 4, cadmium performance and device 3 are suitable, but the operating voltage of device 4 (2.9V) is lower than the operating voltage (4.4V) of device 3, the current consumption (0.58kwh) that device 4 processes water per ton is only 66% of device 3.Under these conditions, anode work-ing life of device 3 is 385 hours, and anode work-ing life of device 4 is 807 hours, and the pole plate replacement cycle of device 4 is 2.1 times of device 3.
Embodiment three
With the stainless steel square tube of two 110 × 110 × 600mm for shell, aluminium sheet (the trade mark: 1100) be anode and bipolar electrode that 2mm is thick, the stainless steel plate that 2mm is thick is negative electrode, the electric flocculation plant (device 5) that making one is traditional respectively and electric flocculation plant described in the utility model (device 6).The volume of non-loading electrode timer is 6L.Device 5 polar plate spacing is 11mm, can fill 8 pole plates.Device 6 polar plate spacing is 1.5mm, can fill 27 pole plates.
The electroplating wastewater of certain cupric 23.5mg/L is processed respectively with device 5 and device 6.Concrete steps are:
After former water sodium hydroxide adjust ph to 6, access to plant 5 and device 6 process, and water inlet speed is 60L/ hour, and working current is 12A.Now, the operating voltage of device 5 is 9.8V, and plate current density is 5.1mA/cm
2, flow rate is 1.9mm/s; The operating voltage of device 6 is 4.6V, and plate current density is 1.5mA/cm
2, flow rate is 3.7mm/s.Discharge of wastewater is after treatment to settling pond, and after 60min leaves standstill, sampling detects the copper content in water outlet.Detected result shows, in device 5 and device 6 water outlet, the concentration value of copper is respectively 0.45mg/L and 0.38mg/L, meets emission standard.
As can be seen here, when the unit time process water yield is identical with working current, the copper removal performance of device 6 is suitable with device 5, but the operating voltage of device 6 (4.6V) is starkly lower than the operating voltage (9.8V) of device 5, the current consumption (0.92kwh) that device 6 processes water per ton is only 42% of device 5.Under these conditions, anode work-ing life of device 5 is 343 hours, and anode work-ing life of device 6 is 946 hours, and the pole plate replacement cycle of device 6 is 2.76 times of device 5.
As shown in Fig. 2 (a)-Fig. 2 (b), when the timing of the process water yield one, any one in employing iron, aluminium, magnesium is as anode material, under different operating electric current, Novel electric flocculation plant is all than the more power saving of traditional electrical flocculation plant, and its current consumption processing water per ton is about the latter's 40 ~ 70%.
As shown in Fig. 3 (a)-Fig. 3 (e), any one in employing iron, aluminium, magnesium is as anode material, and Novel electric flocculation plant all shows the advantages such as operating voltage is low, current consumption is few, current density is little, water flow velocity is high, electrode life is long.
Embodiment result shows, the Novel electric flocculation plant in the utility model effectively can remove the heavy metal ion such as zinc, cadmium, copper, arsenic in trade effluent, and clearance can reach more than 95%.Compared with the board-like electric flocculation plant of traditional draw-in groove fixed pole, Novel electric flocculation plant has the advantages such as operating voltage is low, current consumption is few, electrode life is long, is applicable to the wastewater treatment of the industries such as metallurgy, mining, plating, intermetallic composite coating.
Claims (4)
1. a pole plate slidably high-density electricity flocculation plant, it is characterized in that, this electric flocculation plant is made up of stainless steel casing and the electrode group being seated in stainless steel casing inside, electrode group is made up of the bipolar electrode between positive plate, negative plate and positive plate, negative plate, be parallel to each other between pole plate, do not use the draw-in groove for fixed polar plate, electrode can slide along the direction perpendicular to pole plate.
2. according to pole plate according to claim 1 slidably high-density electricity flocculation plant, it is characterized in that, pole plate be vertically placed on be fixed on the inner stainless steel step of stainless steel casing enhancement type polytetrafluoro pad on, separate with insulating barrier between electrode group and stainless steel casing.
3. according to pole plate according to claim 1 slidably high-density electricity flocculation plant, it is characterized in that, electrode group side is parallel to pole plate and arranges flat air bag, separates between the pole plate of electrode group with plastic cap nut or the plastic strip that is parallel to pole plate; After pole plate has loaded, make the swelling of electrode group to the flat airbag aeration being parallel to pole plate and fix; During dismounting electrode group, the gas in flat air bag is discharged, take out electrode.
4. according to pole plate according to claim 1 slidably high-density electricity flocculation plant, it is characterized in that, this electric flocculation plant comprises: positive plate, negative plate, bipolar electrode, stainless steel casing, water outlet, water-in, slag bucket, slag-drip opening, stainless steel step, enhancement type polytetrafluoro pad, flat air bag, insulating barrier, and concrete structure is as follows:
Bottom in stainless steel casing is arranged with stainless steel step, stainless steel step is arranged enhancement type polytetrafluoro pad, electrode group is arranged on the enhancement type polytetrafluoro pad in stainless steel casing, bottom cavity in stainless steel casing is slag bucket, slag bucket bottom surface has slag-drip opening, the side lower of stainless steel casing has water-in, and the side surface upper part of stainless steel casing has water outlet; One in electrode group arranges flat air bag between transverse side and stainless steel casing, positive plate in electrode group, negative plate, bipolar electrode and flat balloon ends are erected on enhancement type polytetrafluoro pad respectively, arrange insulating barrier respectively between the two ends of positive plate, negative plate, bipolar electrode and flat air bag and stainless steel casing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420330465.9U CN204039109U (en) | 2014-06-20 | 2014-06-20 | A kind of pole plate is high-density electricity flocculation plant slidably |
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| CN201420330465.9U CN204039109U (en) | 2014-06-20 | 2014-06-20 | A kind of pole plate is high-density electricity flocculation plant slidably |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071871A (en) * | 2014-06-20 | 2014-10-01 | 张家港格林台科环保设备有限公司 | High-density electric flocculation device with slidable pole plates and use method thereof |
| CN107367438A (en) * | 2017-07-14 | 2017-11-21 | 东莞市同欣表面处理科技有限公司 | A kind of method that electroplating current efficiency is tested using square Hull cell |
-
2014
- 2014-06-20 CN CN201420330465.9U patent/CN204039109U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071871A (en) * | 2014-06-20 | 2014-10-01 | 张家港格林台科环保设备有限公司 | High-density electric flocculation device with slidable pole plates and use method thereof |
| CN107367438A (en) * | 2017-07-14 | 2017-11-21 | 东莞市同欣表面处理科技有限公司 | A kind of method that electroplating current efficiency is tested using square Hull cell |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141224 Effective date of abandoning: 20150722 |
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| RGAV | Abandon patent right to avoid regrant |