CN203451321U - Device for treating nitrobenzene waste water - Google Patents
Device for treating nitrobenzene waste water Download PDFInfo
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- CN203451321U CN203451321U CN201320553295.6U CN201320553295U CN203451321U CN 203451321 U CN203451321 U CN 203451321U CN 201320553295 U CN201320553295 U CN 201320553295U CN 203451321 U CN203451321 U CN 203451321U
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Abstract
The utility model belongs to the technical field of nitrobenzene waste water treatment, in particular relates to a device for treating nitrobenzene waste water and solves the problems existing in the prior art of nitrobenzene waste water treatment. The device for treating the nitrobenzene waste water is characterized in that a rotating bed main body of a rotating filler bed comprises an upper part and a lower part, namely a gas collection chamber and a main chamber, wherein a filler rotor which can reversely rotate at a high speed is arranged in the main chamber, an air inlet pipe of the rotating filler bed is connected with an ozone generator, a liquid inlet pipe is connected with the liquid inlet of a micro electrolytic tank, a liquid discharge pipe is connected with the liquid outlet of the micro electrolytic tank, and an exhaust pipe is connected with a KI absorption liquid. The device for treating the nitrobenzene waste water has the beneficial effects that a technological process is simple, operation is easy, three technologies are coupled, and the advantages of each technology are played to the utmost extent, so that the aim of treating waste by virtue of waste is achieved, and treatment cost is reduced to the utmost extent.
Description
Technical field
The utility model belongs to the technical field of the processing of nitrobenzene wastewater, is specifically related to a kind of device of absorbing and reducing oxidation degradation of nitrobenzene wastewater.
Background technology
For example Chinese patent 201310083327.5, it discloses a kind of method and apparatus of absorbing and reducing oxidation degradation of nitrobenzene wastewater, but it is because the rotary packed bed rotor adopting is one-piece construction, be that filler in rotor is by single rotating shaft driven rotary, the patent of first high-gravity rotating bed aspect is proposed in 1979 by Britain Imperial Chemical Industries (ICI), the patent No. is EP0002568, and at home and abroad disclosed patent has also continued this rotor structure substantially successively subsequently.Calendar year 2001, the people such as Sandilya study discovery, the mass transferring in gas phase process of carrying out in rotary packed bed, also low than in packing tower of its mass transfer coefficient, reason is to be subject to frictional force effect after gas enters filler, very little with the relative slip velocity between filler, gas phase interface can not get quick renewal, and in filler, the phenomenon of liquid distribution inequality can make rate of mass transfer further reduce simultaneously.
Result of study shows: compare liquid film mass transfer coefficient k with packing tower
l2～8 times have been improved, the cumulative volume mass transfer coefficient K of liquid phase
lit is more remarkable that a improves, and reaches 1～2 order of magnitude, and these show that hypergravity effect is remarkable to the strengthening effect of the mass-transfer progress of liquid film controlling; Also find: the cumulative volume mass transfer coefficient K of gas phase simultaneously
ga has also increased (but far away from K
lbut gas-film mass transfer coefficient k a),
gbut change very micro-ly, these show that hypergravity effect is not good to the strengthening effect of the mass-transfer progress of gas-film controlling, and why the cumulative volume mass transfer coefficient of gas phase has increased, and main contribution is to adopt due to the filler of high-specific surface area a.For gas-film controlling process, (By Ozone is processed waste water, water absorbs NH so
3or HCl gas, alkali liquor absorption HCl or H
2s or SO
2gas etc.) can control as forced fluid membrane mass transfer, make gas phase mass transfer coefficient also be able to substantial increasing substantially? this is technology of chemical engineering frontier---the new problem that hypergravity Chemical Engineering Technology faces.
Based on upper, the purpose of this utility model is to solve the difficult problem existing in above-mentioned existing hypergravity equipment and technology, provides the reverse shearing of a kind of efficient air-flow rotary packed bed equipment, can be applicable to the occasion that flux is large, processing requirements is high.
Summary of the invention
Goal of the invention of the present utility model: in order to solve above-mentioned the deficiencies in the prior art.
The utility model adopts following technical scheme to realize:
The device of absorbing and reducing oxidation degradation of nitrobenzene wastewater, comprise rotary packed bed, the described rotary packed bed rotating bed main body that comprises, equipment supporter and transmission mechanism, rotating bed main body comprises upper and lower two portions: collection chamber and main chamber, in main chamber, be provided with can high speed retrograde rotation filler rotor, main chamber top connects inlet pipe, main chamber's bottom connected drainage pipe, filler rotor center arranges liquid distributor, liquid distributor connects liquid-inlet pipe, collection chamber top connects vapor pipe, the perforate of filler rotor top is communicated with collection chamber, rotary packed bed inlet pipe connects ozonizer, liquid-inlet pipe connects the liquid-inlet of micro-electrolyzer, liquid discharge pipe connects the liquid exit of micro-electrolyzer, vapor pipe connects KI absorption liquid.
Described rotary packed bed filler rotor comprises top rotary table and the lower rotary table of independent rotation respectively, top rotary table bottom and lower rotary table top are separately installed with some concentric annular packing supports, packing support inside is equipped with filler and is formed packing ring, packing ring on upper and lower rotating disk is nested against one another, between adjacent packing ring, leave gap, top rotary table top is connected with solid shaft, and lower rotary table bottom is connected with tubular shaft, tubular shaft top connects liquid distributor, and tubular shaft bottom connects liquid-inlet pipe.
Described rotary packed bed top rotary table bottom and lower rotary table top are respectively arranged with the groove of some concentric annular, and packing ring is fixed in groove, and it is interior and leave gap with the bottom land of another rotating disk that the free end of packing ring stretches into the groove of another rotating disk.
Main chamber and collection chamber are isolated by dividing plate, and the perforate of dividing plate central position also arranges tubular construction, are convenient to solid shaft and are connected with top rotary table through dividing plate.
Described rotary packed bed packing support is tubular stainless steel coil or mesh plate, circumferentially densely covered perforate, the outer rim of packing support is provided with some form drag parts, described form drag part is that Metal Flake projection, profile are rectangle or trilateral etc., at right angle setting in the outer circumference of packing support to.
Between described rotary packed bed tubular shaft and liquid-inlet pipe, use swivel joint to be connected.
Described rotary packed bed inlet pipe connects main chamber through collection chamber.
The position that described rotary packed bed filler rotor top perforate is communicated with collection chamber arranges sealed structure, sealed structure comprises top cover labyrinth setting up and down and lower sealing cover, top cover labyrinth is placed on tubular construction, lower sealing cover is connected with top rotary table, lower sealing cover center is uniform arranges some scallop holes, upper and lower sealing cover is provided with labyrinth, and the labyrinth of upper and lower sealing cover is embedded in together mutually, and the outmost turns of labyrinth arranges oil sealing felt collar.
Rotary packed bed whole rotating bed main body and motor are installed on equipment supporter, rotating bed main body is fixed on carriage center place by deck, motor is fixed in the T-slot at the upper and lower position of support, motor standing bolt can slide in T-slot, described transmission mechanism comprises that tubular shaft, solid shaft, belt pulley, belt and motor form, negative pulley wheel is all equipped with in tubular shaft and solid shaft outer end, by belt, is connected with motor.
Compared with prior art, the utility model processing efficiency improves more than 25%, and the reaction times shortens 32%, and ozone utilization rate improves 30%, has reduced greatly processing cost.
The utlity model has following beneficial effect: technical process is simple, easy to operate, three kinds of technology couplings, farthest bring into play the advantage of various technology, reach the object of the treatment of wastes with processes of wastes against one another, reduced to greatest extent processing cost.Can be applicable to process various organic industrial sewages as heavy metal-containing waste water, explosive waste water, waste water from dyestuff, petroleum chemical enterprise's waste water, washing composition waste water etc.
Accompanying drawing explanation
Fig. 1 is the process flow sheet that utilizes absorbing and reducing oxidation degradation of nitrobenzene wastewater;
Fig. 2 is rotary packed bed structural representation
Fig. 3 is a kind of structural representation of the utility model form drag part;
Fig. 4 is the another kind of structural representation of the utility model form drag part;
Fig. 5 is the assembling schematic diagram of packing ring on lower rotary table on the utility model;
Fig. 6 is rotary packed bed internal structure schematic diagram,
In figure: 1-is rotary packed bed, 2-oxygen canister or air, 3-ozonizer, 4-gas meter, 5-frequency transformer, 6-motor, 7-liquid meter, 8-liquid pump, the micro-electrolyzer of 9-, 10-agitator, 11-KI absorption liquid;
1.1-inlet pipe, 1.2-vapor pipe, 1.3-rotating bed main body, 1.4-liquid discharge pipe, 1.5-swivel joint, 1.6-belt, 1.7-equipment supporter, 1.8-T type groove, 1.9-motor, 1.10-belt pulley, 1.11-main chamber, 1.12-packing ring, 1.13-resorber liquid distributor, 1.14-tubular shaft, 1.15-bearing, 1.16-axle sleeve I, 1.17-lower rotary table, 1.18-top rotary table, 1.19-top cover labyrinth, 1.20-collection chamber, 1.21-axle sleeve II, 1.22-solid shaft, 1.23-oil sealing, 1.24-lower sealing cover, 1.25-dividing plate.
Embodiment
By reference to the accompanying drawings embodiment of the present utility model is described further.
The device of absorbing and reducing oxidation degradation of nitrobenzene wastewater, comprise rotary packed bed 1, the rotary packed bed rotating bed main body 1.3 that comprises, equipment supporter 1.7 and transmission mechanism, rotating bed main body 1.3 comprises upper and lower two portions: collection chamber 1.20 and main chamber 1.11, in main chamber 1.11, be provided with can high speed retrograde rotation filler rotor, main chamber 1.11 tops connect inlet pipe 1.1, main chamber's 1.11 bottom connected drainage pipes 1.4, filler rotor center arranges liquid distributor 1.13, liquid distributor 1.13 connects liquid-inlet pipe, collection chamber 1.20 tops connect vapor pipe 1.2, the perforate of filler rotor top is communicated with collection chamber 1.20, rotary packed bed 1 inlet pipe connects ozonizer 3, liquid-inlet pipe connects the liquid-inlet of micro-electrolyzer 9, liquid discharge pipe connects the liquid exit of micro-electrolyzer 9, vapor pipe connects KI absorption liquid 11.
Rotary packed bed 1 liquid-inlet pipe is connected with lean solution recycle pump 6 through interchanger 7, and the liquid discharge pipe 1.4 of rotary packed bed resorber 1 is connected with rich solution storage tank 3, and the inlet pipe 1.1 of rotary packed bed resorber 1 is connected with sulfur-containing smoke gas, and vapor pipe 1.2 is connected with chimney; Rotary packed bed desorption device 2 liquid-inlets 2.8 are connected with lean solution recycle pump 6, middle, through interchanger 7, rotary packed bed desorption device 2 liquid exits 2.11 are connected with lean solution storage tank 4, rotary packed bed desorption device 2 pneumatic outlets 2.7 are connected with condenser 8, rotary packed bed desorption device 2 gas feeds 2.5 are connected with water vapor source, and the shell of rotary packed bed desorption device 2 is provided with insulation jacket.
Rotary packed bed 1 filler rotor comprises top rotary table 1.18 and the lower rotary table 1.17 of independent rotation respectively, top rotary table 1.18 bottoms and lower rotary table 1.17 tops are separately installed with some concentric annular packing supports, packing support inside is equipped with filler and is formed packing ring 1.12, packing ring on upper and lower rotating disk is nested against one another, between adjacent packing ring, leave gap, top rotary table 1.18 tops are connected with solid shaft 1.22, lower rotary table 1.17 bottoms are connected with tubular shaft 1.14, tubular shaft 1.14 tops connect liquid distributor 1.13, and tubular shaft 1.14 bottoms connect liquid-inlet pipe.
Rotary packed bed 1 top rotary table 1.18 bottoms and lower rotary table 1.17 tops are respectively arranged with the groove of some concentric annular, and packing ring 1.12 is fixed in groove, and the free end of packing ring stretches in the groove of another rotating disk and leaves gap with the bottom land of another rotating disk.
Main chamber 1.11 and collection chamber 1.20 are isolated by dividing plate 1.25, dividing plate 1.25 central position perforates also arrange tubular construction along hole week, tubular construction bottom be connected in the hole week of filler rotor top perforate, solid shaft 1.22 passes tubular construction and is connected with top rotary table 1.18.
Rotary packed bed 1 packing support is tubular stainless steel coil, circumferentially densely covered perforate, the outer rim of packing support is provided with some form drag parts, and described form drag part is that Metal Flake projection, profile are rectangle or trilateral, and at right angle setting is in the outer rim of packing support.
Between rotary packed bed 1 tubular shaft 1.14 and liquid-inlet pipe, use swivel joint 1.5 to be connected.
Rotary packed bed 1 inlet pipe 1.1 connects main chamber 1.11 through collection chamber 1.20.
The position that rotary packed bed 1 filler rotor top perforate is communicated with collection chamber arranges sealed structure, described sealed structure comprises top cover labyrinth setting up and down 1.19 and lower sealing cover 1.24, top cover labyrinth 1.19 is placed on tubular construction, lower sealing cover 1.24 is connected with top rotary table 1.18, lower sealing cover 1.24 centers are uniform arranges some scallop holes, upper and lower sealing cover is provided with labyrinth, and the labyrinth of upper and lower sealing cover is embedded in together mutually, and the outmost turns of labyrinth arranges oil sealing felt collar.
Rotary packed bed 1 whole rotating bed main body 1.3 and motor 1.9 are installed on equipment supporter 1.7, rotating bed main body 1.3 is fixed on support 1.7 centers by deck, motor 1.9 is fixed in the T-slot 1.8 at support position Shang Xia 1.7, motor standing bolt can be in the interior slip of T-slot 1.8, described transmission mechanism comprises that tubular shaft 1.14, solid shaft 1.22, belt pulley 1.10, belt 1.6 and motor 1.9 form, negative pulley wheel is all equipped with in tubular shaft 1.14 and solid shaft 1.22 outer ends, by belt 1.6, is connected with motor 1.9.
The processing method of absorbing and reducing oxidation degradation of nitrobenzene wastewater, step is as follows:
1, with acidic cpd, the pH value of the nitrobenzene wastewater in micro-electrolyzer is adjusted to 2 ~ 3, acidic cpd can adopt dilute sulphuric acid or dilute hydrochloric acid;
2, waste water carries out sufficient micro-electrolytic reduction pre-treatment in micro-electrolyzer 12, and the stirring action of the whipping appts in micro-electrolyzer can make solid-liquid fully contact, and accelerates galvanic cell reaction; The hydrogenation reduction that completes nitrobenzene compounds in this process, is converted into aniline category matter by nitrobenzene matters.The galvanic cell material that above-mentioned micro-electrolysis adopts is reductibility iron powder and gac, and whipping appts is electric mixer, and rotating speed is 200 ~ 800rpm.
3, ozone enters rotary packed bed 7 measuring by gas meter 5 from ozonizer 3, waste water after micro-electrolysis enters rotary packed bed 7 by liquid-inlet under the effect of liquid pump 11 after liquid meter 9 meterings, waste water radially sprays from the aperture of resorber liquid distributor, enter the filler of high speed rotating, be subject to the cutting of multilayer retrograde rotation filler, trapping, coalescence becomes micron-sized liquid film, drop and brin, ozone is transported to rotating bed main chamber by inlet pipe, outer rim along rotor under the promotion of pressure is passed filler, through multilayer retrograde rotation filler and form drag part, repeatedly shear, disperse, greatly increase the turbulence of gas phase, repeatedly shearing with waste water, in dispersion process, carry out multi-stage countercurrent contact, tubulence energy increases, accelerated phase interface renewal rate, the abundant contact reacts of waste water and ozone, in this process, complete the aniline category matter that pre-treatment reduction generates and the oxidative degradation of not reducing nitrobenzene compounds, wherein part ozone solution is in waste water, the electrode reaction of micro-electrolysis produces a large amount of Fe
2+and [H], and Fe in waste water
2+can produce the stronger OH of oxidisability by catalysis ozone, the pollutent in part waste water is small-molecule substance by ozone, OH oxygenolysis simultaneously.Waste water is in micro-electrolyzer and rotary packed bed circular treatment, and gas-liquid completes after reaction, and remaining ozone gas is discharged from top to enter and KI absorption liquid 17, completed smelly oxygen absorption.
Embodiment 1: process the dinitrotoluene (DNT) (DNT) in fiery explosive factory waste water.In waste water, dinitrotoluene (DNT) starting point concentration is 190mg/L, adopt micro-electrolysis to process the waste water of 2.5L, at pH=3, iron powder add-on is 28g/L, iron carbon mass ratio Fe:C=1:1, the reaction times is 1.5h, under the condition that agitator stirring velocity is 200r/min, more than 80% nitro-compound is converted into aniline category matter, and the liquid gas volume ratio of micro-electrolysis water outlet and ozone is 400L/m
3, ozone concn is 50mg/L, and rotary packed bed rotating speed is 500rpm, and after degraded 60min, its pollutants removal rate reaches more than 98%; And do not adopt the waste water of micro-electrolysis pretreatment, constant in treatment capacity, in the constant situation of ozone concn, the clearance of its nitro-compound only has 50%.Micro-electrolysis pretreatment can significantly improve the bio-degradable of waste water, and the reaction times shortens 22%, and ozone utilization rate improves 26%, saves follow-up processing cost.
Embodiment 2: Treatment of TNT waste water.The concentration of the trotyl in waste water is 16mg/L, with dilute sulphuric acid, regulates pH value to 3.0.Water sampling 2L, right waste water is processed pre-treatment to adopt micro-electrolysis, iron powder add-on is 10g/L, iron carbon mass ratio is 1:1.5, stirring velocity is 400r/min, reaction times is under 1.5h condition, and more than 90% nitro-compound is converted into aniline category matter, and the liquid-gas ratio of micro-electrolysis water outlet and ozone is 100L/m
3, ozone concn is 25mg/L, and rotary packed bed height is 18cm, and diameter is 12cm, rotating speed 1200rpm, after reaction 30min, the clearance of the organic pollutant in waste water almost reaches 100%.And micro-electrolysis/ozone process constant in liquid-gas ratio, ozone concn, stirring velocity, reaction times etc. in the situation that its pollutants removal rate only have 40% left and right high-gravity technology that ozone utilization rate is improved to 25%, reaction times shortens 22%, can effectively strengthen gas-liquid mass transfer, improve reaction efficiency, save the reaction times, reduce processing cost.
Embodiment 3: treatment of Nitrobenzene waste water.The concentration of Nitrobenzene in Wastewater is 100mg/L, regulates pH value to 1.5.Water sampling 3.5L, adopts micro-electrolysis p-nitrophenyl waste water to carry out pre-treatment, and the reaction times is 1h, stirring velocity is 600r/min, and iron powder add-on is 20g/L, under the condition that iron carbon mass ratio is 3:1, its reduction ratio reaches more than 96%, and the liquid-gas ratio of micro-electrolysis water outlet and ozone is 50L/m
3, ozone concn is 40mg/L, and rotary packed bed height is 18cm, and diameter is 12cm, rotating speed 2000rpm, after reaction 1h, the clearance of the organic pollutant in waste water almost reaches 100%.Ozone technology is under the condition in identical liquid-gas ratio, ozone concn and reaction times separately, and nitro-compound clearance only has 20%.And micro-electrolysis/ozone process constant in liquid-gas ratio, ozone concn, reaction times etc. in the situation that its pollutants removal rate in 50% left and right.The coupling of micro-electrolysis-ozone-high-gravity technology has improved processing efficiency, and the treatment time shortens 32%, and ozone utilization rate improves 30%, greatly reduces cost for wastewater treatment.
Claims (9)
1. the device of a treatment of Nitrobenzene class waste water, it is characterized in that comprising rotary packed bed (1), the rotary packed bed rotating bed main body (1.3) that comprises, equipment supporter (1.7) and transmission mechanism, rotating bed main body (1.3) comprises upper and lower two portions: collection chamber (1.20) and main chamber (1.11), in main chamber (1.11), be provided with can high speed retrograde rotation filler rotor, main chamber (1.11) top connects inlet pipe (1.1), main chamber (1.11) bottom connected drainage pipe (1.4), filler rotor center arranges liquid distributor (1.13), liquid distributor (1.13) connects liquid-inlet pipe, collection chamber (1.20) top connects vapor pipe (1.2), the perforate of filler rotor top is communicated with collection chamber (1.20), the inlet pipe of rotary packed bed (1) connects ozonizer (3), liquid-inlet pipe connects the liquid-inlet of micro-electrolyzer (9), liquid discharge pipe connects the liquid exit of micro-electrolyzer (9), vapor pipe connects KI absorption liquid (11).
2. the device for the treatment of of Nitrobenzene class waste water according to claim 1, the filler rotor that it is characterized in that described rotary packed bed (1) comprises independent top rotary table (1.18) and the lower rotary table (1.17) rotating respectively, top rotary table (1.18) bottom and lower rotary table (1.17) top are separately installed with some concentric annular packing supports, packing support inside is equipped with filler and is formed packing ring (1.12), on, packing ring on lower rotary table is nested against one another, between adjacent packing ring, leave gap, top rotary table (1.18) top is connected with solid shaft (1.22), lower rotary table (1.17) bottom is connected with tubular shaft (1.14), tubular shaft (1.14) top connects liquid distributor (1.13), tubular shaft (1.14) bottom connects liquid-inlet pipe.
3. the device for the treatment of of Nitrobenzene class waste water according to claim 2, it is characterized in that top rotary table (1.18) bottom of described rotary packed bed (1) and the groove that lower rotary table (1.17) top is respectively arranged with some concentric annular, packing ring (1.12) is fixed in groove, and the free end of packing ring stretches in the groove of another rotating disk and leaves gap with the bottom land of another rotating disk.
4. according to the device of the treatment of Nitrobenzene class waste water described in claim 2 or 3, it is characterized in that main chamber (1.11) and collection chamber (1.20) are by dividing plate (1.25) isolation, dividing plate (1.25) central position perforate also arranges tubular construction, is convenient to solid shaft (1.22) and is connected with top rotary table (1.18) through dividing plate.
5. the device for the treatment of of Nitrobenzene class waste water according to claim 4, the packing support that it is characterized in that described rotary packed bed (1) is tubular stainless steel coil or mesh plate, circumferentially densely covered perforate, the outer rim of packing support is provided with some form drag parts, described form drag part is that Metal Flake projection, profile are rectangle or trilateral etc., at right angle setting in the outer circumference of packing support to.
6. the device for the treatment of of Nitrobenzene class waste water according to claim 5, is used swivel joint (1.5) to be connected between the tubular shaft (1.14) that it is characterized in that described rotary packed bed (1) and liquid-inlet pipe.
7. the device for the treatment of of Nitrobenzene class waste water according to claim 6, is characterized in that the inlet pipe (1.1) of described rotary packed bed (1) connects main chamber (1.11) through collection chamber (1.20).
8. the device for the treatment of of Nitrobenzene class waste water according to claim 7, the position that the filler rotor top perforate of rotary packed bed (1) described in it is characterized in that is communicated with collection chamber arranges sealed structure, sealed structure comprises top cover labyrinth setting up and down (1.19) and lower sealing cover (1.24), top cover labyrinth (1.19) is placed on tubular construction, lower sealing cover (1.24) is connected with top rotary table (1.18), lower sealing cover (1.24) center is uniform arranges some scallop holes, on, lower sealing cover is provided with labyrinth, on, the labyrinth of lower sealing cover is embedded in together mutually, the outmost turns of labyrinth arranges oil sealing felt collar.
9. the device for the treatment of of Nitrobenzene class waste water according to claim 8, the whole rotating bed main body (1.3) and the motor (1.9) that it is characterized in that described rotary packed bed (1) are installed on equipment supporter (1.7), rotating bed main body (1.3) is fixed on support (1.7) center by deck, motor (1.9) is fixed in the T-slot (1.8) at the upper and lower position of support (1.7), motor standing bolt can slide in T-slot (1.8), described transmission mechanism comprises tubular shaft (1.14), solid shaft (1.22), belt pulley (1.10), belt (1.6) and motor (1.9) form, negative pulley wheel is all equipped with in tubular shaft (1.14) and solid shaft (1.22) outer end, by belt (1.6), be connected with motor (1.9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320553295.6U CN203451321U (en) | 2013-09-07 | 2013-09-07 | Device for treating nitrobenzene waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320553295.6U CN203451321U (en) | 2013-09-07 | 2013-09-07 | Device for treating nitrobenzene waste water |
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| Publication Number | Publication Date |
|---|---|
| CN203451321U true CN203451321U (en) | 2014-02-26 |
Family
ID=50131218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320553295.6U Withdrawn - After Issue CN203451321U (en) | 2013-09-07 | 2013-09-07 | Device for treating nitrobenzene waste water |
Country Status (1)
| Country | Link |
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| CN (1) | CN203451321U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466849A (en) * | 2013-09-07 | 2013-12-25 | 中北大学 | Device for treating nitrobenzene wastewater |
-
2013
- 2013-09-07 CN CN201320553295.6U patent/CN203451321U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103466849A (en) * | 2013-09-07 | 2013-12-25 | 中北大学 | Device for treating nitrobenzene wastewater |
| CN103466849B (en) * | 2013-09-07 | 2016-04-27 | 中北大学 | A kind of device for the treatment of of Nitrobenzene class waste water |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140226 Effective date of abandoning: 20160427 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |