CN112079402A - Grid sewage-removing machine for sewage treatment - Google Patents
Grid sewage-removing machine for sewage treatment Download PDFInfo
- Publication number
- CN112079402A CN112079402A CN202011004471.1A CN202011004471A CN112079402A CN 112079402 A CN112079402 A CN 112079402A CN 202011004471 A CN202011004471 A CN 202011004471A CN 112079402 A CN112079402 A CN 112079402A
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- China
- Prior art keywords
- machine body
- rake teeth
- row
- worm
- sewage treatment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000010865 sewage Substances 0.000 title claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 230000000694 effects Effects 0.000 claims abstract description 15
- 230000009471 action Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 10
- 238000005201 scrubbing Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000005389 magnetism Effects 0.000 claims description 4
- 230000007306 turnover Effects 0.000 claims description 4
- 238000005202 decontamination Methods 0.000 abstract description 3
- 230000003588 decontaminative effect Effects 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000000926 separation method Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to the technical field of sewage treatment, and discloses a grid sewage remover for sewage treatment, which comprises a machine body, wherein a driving device is fixedly arranged on the front side of the top end of the machine body, transmission side plates are fixedly arranged on two sides of the front side of the machine body, a cleaning box is fixedly arranged on the top of the back side of the machine body, an overload protection device is movably arranged on the top of the machine body above the cleaning box, a rake tooth row is movably arranged between the transmission side plates on the two sides, an adjusting pressure rod is movably arranged at the middle position of the side plate at one side of the machine body, a fixed pressure rod is fixedly arranged at the outer side position of the cleaning box at the other side of the machine body, a flow sensor is fixedly arranged at the bottom of the back of the machine body, driving limit sleeves are movably sleeved on outer rings at two ends of the rake tooth row, a control motor is fixedly connected to the outer sides of the driving limit sleeves, the effect and the efficiency of decontamination are improved through the combined action of the movable adjustment of the rake teeth row, the sensor motor and the like.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a grid sewage removing machine for sewage treatment.
Background
Sewage treatment is a very important research direction today, and along with the discharge and the kind of science and technology development sewage also more and more, grid sewage-cleaning machine is the primary sewage treatment equipment who uses a lot of today, and it utilizes the rake teeth row to separate the impurity in the sewage such as waste paper, fibre class etc. and is taken into the collection box at top under drive mechanism's drive and collect, but can meet some problems when using grid sewage-cleaning machine in practice:
1. because the rake teeth are fixedly and uniformly arranged on the rake tooth row and rotate along with the transmission mechanism, the rake teeth can hang the impurities on the rake teeth in the process of separating the impurities, and then the impurities can automatically fall off at the top by utilizing gravity, but the impurities can not be completely fallen off by the mode, and then the impurities which do not fall off are brought into water when the rake teeth rotate to the bottom, so that the downstream water still contains a plurality of impurities, and the separation and decontamination efficiency is low.
2. Because the length of rake teeth is certain when carrying out the scrubbing with grid de-dirt machine, just can't play the effect of separation to great some solid impurity thing like this, if can't detach it all the time will cause the jam scheduling problem, not only can't continue to separate the scrubbing, still can cause the condition that the stagnant retaining of rivers influences the overflow water, thereby the rake teeth leads to the impurity landing to get off to fall into the effect of scrubbing again in the aquatic again easily at its position that is close to inboard of in-process that rises simultaneously.
Disclosure of Invention
Aiming at the defects of the background technology, the invention provides the grid sewage remover for sewage treatment, which has the advantages of high sewage removal efficiency and good effect, and solves the problems in the background technology.
The invention provides the following technical scheme: a grid cleaner for sewage treatment comprises a machine body, wherein a driving device is fixedly arranged on the front side of the top end of the machine body, transmission side plates are fixedly arranged on two sides of the front side of the machine body, a cleaning box is fixedly arranged on the top of the back side of the machine body, an overload protection device is movably arranged on the top of the machine body above the cleaning box, a rake tooth row is movably arranged between the transmission side plates on two sides, an adjusting pressure rod is movably arranged at the middle position of one side of the machine body, a fixed pressure rod is fixedly arranged at the outer side position of the cleaning box on the other side of the machine body, a flow sensor is fixedly arranged at the bottom of the back side of the machine body, driving limit sleeves are movably sleeved on outer rings at two ends of the rake tooth row, a control motor is fixedly connected to the outer side of each driving limit sleeve, the end face of an output shaft of the control motor, the outer ring of one side, close to the control motor, of the driving limiting sleeve is provided with a pressure groove, and a jacking head is movably sleeved inside the pressure groove.
Preferably, the back of the rake teeth row is uniformly and fixedly provided with fixed rake teeth along the radial direction, the top of the fixed rake teeth is movably provided with a magnetic turning plate, the front of the rake teeth row is uniformly and movably provided with movable rake teeth along the radial direction, an inner shaft hole is formed in the rake teeth row, the rake teeth row is sleeved in the inner ring end of the driving limiting sleeve and provided with a U-shaped air pressure hole, a worm is movably sleeved at the transverse port of the air pressure hole, the top opening of the air pressure hole is movably sleeved with the bottom of the top head, one end, located in the rake teeth row, of the movable rake teeth is fixedly connected with a turntable, and the back of the turntable is fixedly connected with a turbine meshed with the worm.
Preferably, the adjusting pressure rod can be adjusted up and down along the inclined plane of the machine body, the limiting groove is clamped at the inner side of the transmission groove of the transmission side plate, the pressure groove and the adjusting pressure rod are located on the same vertical plane at the same side, and the pressure groove and the fixing pressure rod are located on the same vertical plane at the same side.
Preferably, the rake teeth row is close to one side of the fixed pressure rod and drives the pressure groove of the limiting sleeve to be opened at the bottom, and the ejection height of the ejection head is the same as the depth of the pressure groove.
Preferably, a magnet is fixedly installed in the middle of the front face of the machine body, repulsion exists between the magnetic turning plate and the magnet installed inside the machine body, and the length of each section of tooth key on the worm can only ensure that the end part of each section of worm tooth key is meshed with the worm wheel when the worm wheel rotates for half a turn and is not in a working state.
Preferably, the control motor is controlled by the control system and is connected with the flow sensor, and the feedback action process is as follows: the flow sensor transmits signals to the control system, the control system transmits electric signals to the control motor to control operation, and the control motor drives the rake teeth row to work to ensure that the flow is fed back to the flow sensor.
The invention has the following beneficial effects:
1. set up to the activity and install control motor at the tip through the rake teeth of going up one side with the rake teeth row, and set up fixed depression bar cooperation drive stop collar in clearance case department, compare in prior art, thereby can drive the top compression through fixed depression bar and drive the worm and drive the turbine rotation, thereby adjust the activity rake teeth to be with one side slope with fixed rake teeth, thereby later drive the rake teeth row through control motor and rotate impurity of hanging on the rake teeth along rotating and the incline direction get rid of and collect at the clearance incasement, guaranteed that the clean messenger of clearance subsequent separation scrubbing effect is better, efficiency also improves.
2. Through having set up adjusting the depression bar cooperation drive stop collar, and arrange one side with the rake teeth and set up movable rake teeth, cooperation flow sensor realizes control, compare in prior art, thereby the flow sensor who sets up can detect the flow and judge whether the positive big impurity of existence of scrubbing machine and the serious condition of jam, activity rake teeth equally can rotate one hundred eighty degrees under adjusting the depression bar's effect, later drive the motor through control system and rotate, the rake teeth of both sides can carry out the effect of cuting, thereby carry out separation scrubbing again after certain crushing clearance to big impurity and jam position, guarantee the efficiency of scrubbing, it hooks difficult landing with impurity to produce the repulsion simultaneously between the magnet of board and organism and guarantees it.
Drawings
FIG. 1 is a schematic side view of the structure of the present invention;
FIG. 2 is another schematic view of the structure of the present invention;
FIG. 3 is a schematic view of a rake teeth row of the present invention;
FIG. 4 is a top view of a rake teeth row in accordance with the present invention;
3 FIG. 3 5 3 is 3 a 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 4 3; 3
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 7 is an enlarged view at C of FIG. 5;
FIG. 8 is a schematic diagram of a feedback process according to the present invention.
In the figure: 1. a body; 2. a drive device; 3. a transmission side plate; 4. cleaning the box; 5. an overload protection device; 6. harrowing a tooth row; 601. fixing the rake teeth; 602. movable rake teeth; 603. an inner shaft hole; 604. an air pressure hole; 7. adjusting the pressure lever; 8. fixing the compression bar; 9. a flow sensor; 10. controlling the motor; 11. driving a limit sleeve; 1101. a limiting groove; 1102. pressing a groove; 12. a magnetic turning plate; 13. ejecting the head; 14. a turntable; 15. a turbine; 16. a worm.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, a grid sewage removing machine for sewage treatment comprises a machine body 1, a driving device 2 is fixedly installed on the front side of the top end of the machine body 1, transmission side plates 3 are fixedly installed on both sides of the front side of the machine body 1, a cleaning box 4 is fixedly installed on the top of the back side of the machine body 1, an overload protection device 5 is movably installed on the top of the machine body 1 above the cleaning box 4, rake teeth rows 6 are movably installed between the transmission side plates 3 on both sides, an adjusting pressure rod 7 is movably installed at the middle position of one side of the machine body 1 on the side of the side plate, a fixed pressure rod 8 is fixedly installed at the position of the other side of the machine body 1 on the outer side of the cleaning box 4, a flow sensor 9 is fixedly installed at the bottom of the back side of the machine body 1, the flow sensor 9 can adopt a DN15 tetrafluoro lining flowmeter, driving limit sleeves 11 are movably sleeved on the outer rings at both ends of the rake, the outer ring of one side of the driving limit sleeve 11 close to the middle part of the rake teeth row 6 is provided with a limit groove 1101, the outer ring of one side of the driving limit sleeve 11 close to the control motor 10 is provided with a pressure groove 1102, the interior of the pressure groove 1102 is movably sleeved with a top head 13, the back of the rake teeth row 6 is uniformly and fixedly provided with fixed rake teeth 601 along the radial direction, the top of the fixed rake teeth 601 is movably provided with a magnetic turnover plate 12, the front of the rake teeth row 6 is uniformly and movably provided with movable rake teeth 602 along the radial direction, the interior of the rake teeth row 6 is provided with an inner shaft hole 603, the interior of the inner ring end of the driving limit sleeve 11 sleeved with the rake teeth row 6 is provided with a U-shaped air pressure hole 604, the transverse port of the air pressure hole 604 is movably sleeved with a worm 16, the top opening of the air pressure hole 604 is movably sleeved with the bottom of the top head 13, the top and the bottom of the top head 13 are two, the movable rake teeth 602 are fixedly connected with a rotary disc 14 at one end inside the rake teeth row 6, and a turbine 15 meshed with a worm 16 is fixedly connected to the back of the rotary disc 14.
Wherein, adjust depression bar 7 and can adjust from top to bottom along organism 1 inclined plane, because the water level is not necessary, in order to guarantee that it can rotate the scrubbing with activity rake teeth 602 in surface of water department, spacing groove 1101 joint is inboard at the transmission gear of transmission curb plate 3, homonymy indent 1102 is located same vertical plane with adjusting depression bar 7, homonymy indent 1102 is located same vertical plane with fixed depression bar 8, the top 13 of indent 1102 inside need with two depression bar effects, consequently need guarantee that it can not produce the skew and the circumstances such as jam.
Wherein, rake teeth row 6 is close to the indent 1102 of fixed depression bar 8 one side drive stop collar 11 and is seted up in the bottom, and in order to reserve certain flexible space in the inside of rake teeth row 6 for two worms 16 and prevent the dead condition of card, the ejecting height of top 13 is the same with the degree of depth of indent 1102, pushes down the top 13 completely at every turn and promotes worm 16 just and drive turbine 15 and rotate the half-turn, realizes the regulation of rake teeth.
Wherein, the positive middle part fixed mounting of organism 1 has magnet, there is the repulsion between magnetism board 12 and the 1 internally mounted magnet of organism, utilize magnetism repulsion to carry out the upwarping of magnetism board 12 of turning over, thereby can hook impurity better and prevent to drop down, improve the efficiency of scrubbing, the tip and the turbine 15 meshing of 16 tooth keys of every section worm under the operating condition can only be guaranteed to the tooth key length of every section worm on the worm 16 rotation half-turn and the not operating condition of turbine 15, turbine 15 rotates the half-turn and drives movable rake teeth 602 just and realize one hundred eighty degrees upset, thereby realized that the rake teeth structure of approximate S type more conveniently breaks away from impurity and decomposition impurity.
Wherein, the control motor 10 is controlled by the control system and is connected with the flow sensor 9, and the feedback action flow is as follows: the flow sensor 9 transmits signals to the control system, the control system transmits electrical signals to the control motor 10 to control operation, the control motor 10 drives the rake teeth row 6 to work, then flow is guaranteed and fed back to the flow sensor 9, and accurate control can be guaranteed by controlling through system control, so that the work efficiency and the effect of decontamination can be improved.
The working principle is that the rake teeth row 6 rotates under the driving of the driving device 2 and hooks and moves the impurities upwards from the bottom of the front surface of the machine body 1 during normal work, the magnetic turnover plate 12 is turned upwards a little under the action of the magnetic force in the machine body 1 in the rising process to fix the impurities more firmly and prevent the impurities from falling off, when the rake teeth row 6 runs to the top, the rake teeth turn downwards and enter the cleaning box 4, impurities fall off into the box under the action of gravity, then the fixed pressure rod 8 presses the top head 13 on one side, the top head 13 drives the worm 16 to extend out through the transmission of the internal air pressure hole 604 and is matched with the turbine 15 to rotate for a half circle, namely, the rotary disc 14 and the movable rake teeth 602 rotate for a half circle, the rake teeth on two sides of the rake teeth row 6 form an S shape, and then the motor 10 is controlled to start to drive the rake teeth row 6 to rotate, so that all the impurities hung on the rake teeth are thrown out and cleaned, and the next round of rotation is continued;
when large solid impurities and blockage exist in sewage, the flow sensor 9 on the back of the machine body 1 gives an alarm to transmit information to the control system due to the fact that the flow rate is reduced, at the moment, the adjusting pressure rod 7 needs to be adjusted to the position of the water surface, when the rake teeth row 6 enters the position, the adjusting pressure rod 7 presses down the top head 13 at one end and rotates the same to adjust the movable rake teeth 602, then the rake teeth are rotated under the driving of the control motor 10 to perform shearing decomposition action by utilizing the rake teeth, the rotating direction is opposite to the rotating direction in the cleaning box 4, the impurities after the rotating shearing treatment are reduced and can be easily removed, and the water flow is recovered, namely, the driving decomposition action is stopped to recover normal work.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a grid scrubbing machine for sewage treatment, includes organism (1), the positive fixed mounting on organism (1) top has drive arrangement (2), the positive both sides fixed mounting of organism (1) has transmission curb plate (3), the top fixed mounting at the organism (1) back has cleaning box (4), organism (1) top is located cleaning box (4) top movable mounting has overload protection device (5), movable mounting has harrow row of teeth (6) between transmission curb plate (3) of both sides, its characterized in that: an adjusting pressure lever (7) is movably arranged at the middle position of the side plate at one side of the machine body (1), a fixed compression bar (8) is fixedly arranged at the other side of the machine body (1) and positioned outside the cleaning box (4), a flow sensor (9) is fixedly arranged at the bottom of the back of the machine body (1), driving limit sleeves (11) are movably sleeved on the outer rings of the two ends of the rake teeth row (6), the outer side of the driving limit sleeve (11) is fixedly connected with a control motor (10), the end surface of an output shaft of the control motor (10) is fixedly connected with the end surface of the rake teeth row (6), the outer ring of one side of the driving limit sleeve (11) close to the middle part of the rake teeth row (6) is provided with a limit groove (1101), the outer ring of one side, close to the control motor (10), of the driving limiting sleeve (11) is provided with a pressure groove (1102), and a top (13) is movably sleeved inside the pressure groove (1102).
2. A grill cleaner for sewage treatment according to claim 1, wherein: the back of harrow tooth row (6) is along radial even fixed mounting have fixed rake teeth (601), the top movable mounting of fixed rake teeth (601) has magnetism to turn over board (12), the front of harrow tooth row (6) is along radial even movable mounting have movable rake teeth (602), interior shaft hole (603) have been seted up to the inside of harrow tooth row (6), harrow tooth row (6) cup joint and have been offered in the inside of drive stop collar (11) inner circle end and be U type atmospheric pressure hole (604), the horizontal port activity of atmospheric pressure hole (604) has cup jointed worm (16), the open-top of atmospheric pressure hole (604) is cup jointed with the bottom activity of top (13), movable rake teeth (602) are located the inside one end fixedly connected with carousel (14) of harrow tooth row (6), the back fixedly connected with turbine (15) with worm (16) meshing.
3. A grill cleaner for sewage treatment according to claim 1, wherein: the adjusting compression bar (7) can be adjusted up and down along the inclined surface of the machine body (1), the limiting groove (1101) is connected to the inner side of the transmission groove of the transmission side plate (3) in a clamping mode, the compression groove (1102) and the adjusting compression bar (7) are located on the same vertical plane, and the compression groove (1102) and the fixing compression bar (8) are located on the same vertical plane.
4. A grill cleaner for sewage treatment according to claim 1, wherein: one side of the rake tooth row (6) close to the fixed pressure rod (8) drives the pressure groove (1102) of the limiting sleeve (11) to be arranged at the bottom, and the ejection height of the ejection head (13) is the same as the depth of the pressure groove (1102).
5. A grill cleaner for sewage treatment according to claim 2, wherein: the magnetic worm gear is characterized in that a magnet is fixedly mounted in the middle of the front face of the machine body (1), repulsion exists between the magnetic turnover plate (12) and the magnet mounted inside the machine body (1), and the length of each section of tooth key on the worm (16) can only ensure that the end part of each section of tooth key of the worm (16) is meshed with the worm (15) when the worm (15) rotates for a half circle and is not in working.
6. A grill cleaner for sewage treatment according to claim 1, wherein: the control motor (10) is controlled by a control system and is connected with the flow sensor (9), and the feedback action process is as follows: the flow sensor (9) transmits signals to the control system, the control system transmits electric signals to the control motor (10) to control operation, and the control motor (10) drives the rake teeth row (6) to work to ensure flow and then feed back to the flow sensor (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004471.1A CN112079402A (en) | 2020-09-22 | 2020-09-22 | Grid sewage-removing machine for sewage treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011004471.1A CN112079402A (en) | 2020-09-22 | 2020-09-22 | Grid sewage-removing machine for sewage treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112079402A true CN112079402A (en) | 2020-12-15 |
Family
ID=73738326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011004471.1A Withdrawn CN112079402A (en) | 2020-09-22 | 2020-09-22 | Grid sewage-removing machine for sewage treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112079402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777871A (en) * | 2021-01-15 | 2021-05-11 | 岳阳振兴中顺新材料科技有限公司 | Wastewater treatment process in hydrogen peroxide preparation process |
-
2020
- 2020-09-22 CN CN202011004471.1A patent/CN112079402A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112777871A (en) * | 2021-01-15 | 2021-05-11 | 岳阳振兴中顺新材料科技有限公司 | Wastewater treatment process in hydrogen peroxide preparation process |
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Application publication date: 20201215 |
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| WW01 | Invention patent application withdrawn after publication |