CN108043322A - A kind of water treatment medicine control device for improving sewage treating efficiency - Google Patents
A kind of water treatment medicine control device for improving sewage treating efficiency Download PDFInfo
- Publication number
- CN108043322A CN108043322A CN201711436028.XA CN201711436028A CN108043322A CN 108043322 A CN108043322 A CN 108043322A CN 201711436028 A CN201711436028 A CN 201711436028A CN 108043322 A CN108043322 A CN 108043322A
- Authority
- CN
- China
- Prior art keywords
- equipment body
- dosing
- water treatment
- control device
- sewage treating
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/712—Feed mechanisms for feeding fluids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
- B01F27/701—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers
- B01F27/704—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms comprising two or more shafts, e.g. in consecutive mixing chambers with stirrers facing each other, i.e. supported by opposite walls of the receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2211—Amount of delivered fluid during a period
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/716—Feed mechanisms characterised by the relative arrangement of the containers for feeding or mixing the components
- B01F35/7163—Feed mechanisms characterised by the relative arrangement of the containers for feeding or mixing the components the containers being connected in a mouth-to-mouth, end-to-end disposition, i.e. the openings are juxtaposed before contacting the contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/71805—Feed mechanisms characterised by the means for feeding the components to the mixer using valves, gates, orifices or openings
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/305—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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/005—Valves
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
Abstract
The invention discloses a kind of water treatment medicine control devices for ensuring liquid and can penetrating into each position of water treatment facilities, improving sewage treating efficiency, including equipment body and dosing component, the dosing component includes the dosing manifold for being placed in the equipment body top, the upper end of dosing manifold is formed as dosing mouth, and the dosing component further includes the tube assembly of making up a prescription being placed in inside the equipment body;Convection current formation component is additionally provided on the equipment body, the convection current formation component constantly stirs the liquid in the equipment body, and liquid in the equipment body is promoted to the center of the equipment body.A kind of water treatment medicine control device for improving sewage treating efficiency provided by the invention, pass through the layering of dosing component and the piping mode at interval, it can be ensured that liquid is directly circulated to each position of equipment body by pipeline, and pass through convection current formation component and the liquid in equipment body is stirred continuously and pushes to equipment body center.
Description
Technical field
The present invention relates to water process, environmental technology field more particularly to a kind of water process for improving sewage treating efficiency to add
Medicine control device.
Background technology
In the prior art, when water treatment field is to sewage disposal, the aerobic tank of its either main treatment effect is still detested
Oxygen pond or be its main disinfection sterilization pool, be required for launching pharmaceutical aqueous solution into pond, be commonly called as water treatment agent;
And material is matched, is then sufficiently mixed, to give full play to, it is necessary to according to processing requirement before launching water treatment agent
Drug effect.
The prior art has a kind of sewage disposal device, is communicated with medicine-chest, and medicine-chest constantly conveys liquid into equipment, allows dirt
The sewage that water pipe is delivered in equipment is sufficiently mixed with liquid, and completes sewage disposal.
Authorization Notice No.:CN106241987A, the applying date are entitled for one disclosed on 08 29th, 2016《One kind is used for
The chemicals dosing plant of water process》Chinese invention patent describe and a kind of medicinal liquid flow controlled by control valve, it is ensured that pin
The liquid of corresponding amount is launched to different sewage processing requirement, treatment effect is preferable, saves liquid.But according to disclosed technology
It is not difficult to find that the chemicals dosing plant is only there are one chemical feed pipe, and although internal be provided with agitating device, due to water treatment facilities
It is very big, it can not also ensure that liquid can penetrate into each position of water treatment facilities, therefore, the dress under the stirring of agitating device
It is not optimal to put the treatment effect in terms of water process.
The content of the invention
The object of the present invention is to provide one kind ensure liquid can penetrate into each position of water treatment facilities, improve sewage at
Manage the water treatment medicine control device of efficiency.
To achieve these goals, the present invention provides following technical solution:
A kind of water treatment medicine control device for improving sewage treating efficiency disclosed by the invention, including:
Equipment body, the equipment body are in body structure;
Dosing component, the dosing component include the dosing manifold for being placed in the equipment body top, dosing manifold's
Upper end is formed as dosing mouth, and the dosing component further includes the tube assembly of making up a prescription being placed in inside the equipment body;
Sewage water inlet pipe, the sewage water inlet pipe are placed in the top of the equipment body away from the dosing manifold one sides;
Outlet pipe, the lower part of the equipment body are communicated with outlet pipe, and the outlet pipe is by valve opening and closing, outwards
The regular draining in portion;
Convection current formation component is additionally provided on the equipment body, the convection current formation component constantly stirs the equipment master
In vivo liquid, and liquid in the equipment body is promoted to the center of the equipment body;
The tube assembly of making up a prescription is with multiple rows of cloth pencil group, length direction cloth of the cloth pencil group along the equipment body
If it and is dropped successively from the height of described dosing manifold one end to the output terminal of cloth pencil group described in the other end of the equipment body
It is low;
Control cabinet, the control cabinet are installed on the top of the equipment body;
The control valve of control dosing manifold flows is installed on the dosing manifold, the opening and closing of the control valve by
It controls in the control cabinet.
Further, often arranging the cloth pencil group includes be arranged side by side along the width of the equipment body at least four
Root cloth pencil;
The dosing component further includes the distribution pipe on the top being placed in inside the equipment body, the distribution pipe with it is described
Dosing manifold is connected, and the every cloth pencil is connected with the distribution pipe.
Further, the cloth pencil is of an L-shaped structure.
Further, the lower end of the cloth pencil is provided with supporting rack, and support frame as described above passes through clip and the cloth pencil
End fastening.
Further, solenoid valve is installed, the switch of the solenoid valve is controlled by the control cabinet on the cloth pencil.
Further, the convection current formation component includes two stirrings for being symmetrically disposed on both sides inside the equipment body
Flabellum, two stirring flabellums push the liquid in the equipment body to the center of the equipment body.
Further, the outlet pipe is arranged at the center of the lower part of the equipment body.
Further, it is spaced apart in the distribution pipe and is equipped with multiple dispensing orifices, the cloth pencil is threadedly connected to described point
Distribution, the dispensing orifice are equipped with the capping of threaded connection.
In the above-mentioned technical solutions, a kind of water treatment medicine control dress for improving sewage treating efficiency provided by the invention
It puts, passes through the layering of dosing component and the piping mode at interval, it can be ensured that liquid is directly circulated to equipment body by pipeline
Each position, and pass through convection current formation component and the liquid in equipment body is stirred continuously and pushes to equipment body center, energy
It is enough to realize uniformly mixing;
It is full meanwhile using the flow of control valve, the switch of each pipeline of solenoid valve automation control and monitoring liquid
The requirement of sufficient Water condition.
Description of the drawings
It in order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one described in the present invention
A little embodiments for those of ordinary skill in the art, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structure of water treatment medicine control device for improving sewage treating efficiency provided in an embodiment of the present invention
Schematic diagram.
Reference sign:
1st, equipment body;2nd, sewage water inlet pipe;3rd, dosing manifold;4th, control cabinet;5th, control valve;6th, distribution pipe;7th, cloth medicine
Pipe;8th, solenoid valve;9th, flabellum is stirred;10th, supporting rack;11st, clip;12nd, outlet pipe.
Specific embodiment
In order to which those skilled in the art is made to more fully understand technical scheme, below in conjunction with attached drawing to this hair
It is bright to be further detailed.
It is shown in Figure 1;
A kind of water treatment medicine control device of raising sewage treating efficiency of the present invention, including:
Equipment body 1, the equipment body 1 are in body structure;
Dosing component, dosing component include the dosing manifold 3 for being placed in 1 top of equipment body, the upper end shape of dosing manifold 3
As dosing mouth, dosing component further includes the tube assembly of making up a prescription being placed in inside equipment body 1;
Sewage water inlet pipe 2, sewage water inlet pipe 2 are placed in the top of equipment body 1 away from 3 one sides of dosing manifold;
Outlet pipe 12, the lower part of equipment body 1 are communicated with outlet pipe 12, the outlet pipe 12 by valve opening and closing,
To external regular draining;
It is additionally provided with convection current formation component on equipment body 1, the liquid in the continuous agitating equipment main body 1 of convection current formation component
Body, and liquid in equipment body 1 is promoted to the center of equipment body 1;
Tube assembly of making up a prescription has multiple rows of cloth pencil group, and cloth pencil group is laid along the length direction of equipment body 1, and by dosing
The height of 3 one end of manifold to the output terminal of the other end cloth pencil group of equipment body 1 reduces successively;
Control cabinet 4, control cabinet 4 are installed on the top of equipment body 1;
The control valve 5 of 3 flows of control dosing manifold is installed, the opening and closing of control valve 5 are controlled by dosing manifold 3
Control cabinet 4.
Specifically, present embodiment discloses it is a kind of can not only control medicinal liquid flow but also can control different cloth pencils switch,
And ensuring the sufficient chemicals dosing plant of dosing, the apparatus structure is as described above, it mainly includes the equipment body of box typed structure
1, also, it is same as the prior art, the equipment body 1 of the present embodiment includes dosing manifold 3, sewage water inlet pipe 2, outlet pipe
12 grade parts, wherein, chemicals dosing plant of the prior art is different from, the dosing of the present embodiment employs above-mentioned dosing component,
The dosing component not only includes dosing manifold 3, further includes the tube assembly of making up a prescription connected with dosing manifold 3, and shop of each making up a prescription
Component includes the more cloth pencils 7 laid along 1 width of equipment body, moreover, in order to allow liquid into equipment
Just can be with the waste water of each position after main body 1, the cloth pencil 7 in the present embodiment is laid in layering, meanwhile, also by different groups
Cloth pencil 7 highly set it is inconsistent, can so allow liquid flow out after waste water directly with different position, accelerate mixed
It closes, improves sewage treating efficiency.
Preferably, pencil group of often arranging includes at least four cloth pencils being arranged side by side along the width of equipment body 1
7;Dosing component further includes the distribution pipe 6 on the top being placed in inside equipment body 1, and distribution pipe 6 is connected with dosing manifold 3, every
Cloth pencil 7 is connected with distribution pipe 6.Wherein, cloth pencil 7 is of an L-shaped structure.In addition, the lower end of above-mentioned cloth pencil 7 is provided with support
Frame 10, supporting rack 10 are fastened by the end of clip 11 and cloth pencil 7.The inventive point of the present embodiment is the cloth of the dosing component
In pipe mode, wherein, dosing component by dosing manifold 3 into medicine, first according to the processing requirement of variety classes sewage, configured in advance
Good liquid is then added into dosing manifold 3, and liquid is delivered to distribution pipe 6 by dosing manifold 3, using distribution pipe 6 that liquid is defeated
It send to cloth pencil 7, finally flows into equipment body 1, mixed with the sewage in equipment body 1, and it is harmful in sewage respectively
Substance.
And liquid can be delivered to each position in equipment body 1 by the piping mode of above-mentioned dosing component, compared to existing
There is technology, going out liquid in chemical feed pipe can be achieved with mixing, and improve sewage treating efficiency.
Preferably, solenoid valve 8 is installed, the switch of solenoid valve 8 is controlled by control cabinet 4 in the present embodiment on cloth pencil 7.Separately
Outside, convection current formation component includes two stirring flabellums 9 for being symmetrically disposed on 1 inside both sides of equipment body, and two stirring flabellums 9 will
Liquid in equipment body 1 is pushed to the center of equipment body 1.And outlet pipe 12 is arranged at the center of the lower part of equipment body 1.
Solenoid valve 8, in addition, in order to accelerate to mix, can be carried to control the switch of cloth pencil 7 with the selectively opened cloth pencil 7 specified
Convection current formation component has also been devised in high treatment efficiency, the present embodiment, and two stirring flabellums 9 of the convection current formation component are opposite to be set
It puts, and the liquid of equipment body 1 is constantly pushed to the center of equipment body 1, finally, the outlet pipe 12 in the present embodiment designs
At the center of the lower part of equipment body 1, so design is also for ensuring to promote mixed sewage energy through convection current formation component
Enough position outflows best in treatment effect.
The technical solution being more highly preferred to as the present embodiment:It is spaced apart in distribution pipe 6 and is equipped with multiple dispensing orifices, cloth pencil 7
Dispensing orifice is threadedly connected to, dispensing orifice is equipped with the capping of threaded connection.
In the above-mentioned technical solutions, a kind of water treatment medicine control dress for improving sewage treating efficiency provided by the invention
It puts, passes through the layering of dosing component and the piping mode at interval, it can be ensured that liquid is directly circulated to equipment body 1 by pipeline
Each position, and pass through convection current formation component and the liquid in equipment body 1 be stirred continuously and is pushed in equipment body 1
Centre, can realize uniform mixing;
Meanwhile using control valve 5, each pipeline of 8 automation control of solenoid valve switch and monitor liquid flow,
Meet the requirement of Water condition.
Above some exemplary embodiments that the present invention is only described by way of explanation, undoubtedly, for ability
The those of ordinary skill in domain, without departing from the spirit and scope of the present invention, can be with a variety of modes to institute
The embodiment of description is modified.Therefore, above-mentioned attached drawing and description are regarded as illustrative in nature, and should not be construed as to the present invention
The limitation of claims.
Claims (8)
1. a kind of water treatment medicine control device for improving sewage treating efficiency, which is characterized in that including:
Equipment body (1), the equipment body (1) are in body structure;
Dosing component, the dosing component include the dosing manifold (3), dosing manifold that are placed in the equipment body (1) top
(3) upper end is formed as dosing mouth, and the dosing component, which further includes, is placed in the internal tube assembly of making up a prescription of the equipment body (1);
Sewage water inlet pipe (2), the sewage water inlet pipe (2) are placed in the top of the equipment body (1) away from the dosing manifold
(3) one side;
Outlet pipe (12), the lower part of the equipment body (1) are communicated with outlet pipe (12), which passes through valve opening
And closing, to external regular draining;
Convection current formation component is additionally provided on the equipment body (1), the convection current formation component constantly stirs the equipment master
Liquid in body (1), and the equipment body (1) interior liquid is promoted to the center of the equipment body (1);
The tube assembly of making up a prescription is with multiple rows of cloth pencil group, length direction cloth of the cloth pencil group along the equipment body (1)
And if from described dosing manifold (3) one end to the height of the output terminal of cloth pencil group described in the other end of the equipment body (1)
It reduces successively;
Control cabinet (4), the control cabinet (4) are installed on the top of the equipment body (1);
The control valve (5) of control dosing manifold (3) flow, the unlatching of the control valve (5) are installed on the dosing manifold (3)
It is controlled by the control cabinet (4) with closing.
2. a kind of water treatment medicine control device for improving sewage treating efficiency according to claim 1, which is characterized in that
Often arranging the cloth pencil group includes at least four cloth pencils (7) being arranged side by side along the width of the equipment body (1);
The dosing component further includes the distribution pipe (6) for being placed in the internal top of the equipment body (1), the distribution pipe (6)
It is connected with the dosing manifold (3), the every cloth pencil (7) connects with the distribution pipe (6).
3. a kind of water treatment medicine control device for improving sewage treating efficiency according to claim 2, which is characterized in that
The cloth pencil (7) is of an L-shaped structure.
4. a kind of water treatment medicine control device for improving sewage treating efficiency according to claim 3, which is characterized in that
The lower end of the cloth pencil (7) is provided with supporting rack (10), and support frame as described above (10) passes through clip (11) and the cloth pencil (7)
End fastening.
5. a kind of water treatment medicine control device for improving sewage treating efficiency according to any one of claim 2 to 4,
It is characterized in that, being equipped with solenoid valve (8) on the cloth pencil (7), the switch of the solenoid valve (8) is controlled by the control cabinet
(4)。
6. a kind of water treatment medicine control device for improving sewage treating efficiency according to claim 1, which is characterized in that
The convection current formation component includes two stirring flabellums (9) for being symmetrically disposed on the internal both sides of the equipment body (1), two institutes
Stirring flabellum (9) is stated to push the liquid in the equipment body (1) to the center of the equipment body (1).
7. a kind of water treatment medicine control device for improving sewage treating efficiency according to claim 1, which is characterized in that
The outlet pipe (12) is arranged at the center of the lower part of the equipment body (1).
8. a kind of water treatment medicine control device for improving sewage treating efficiency according to claim 2, which is characterized in that
It is spaced apart on the distribution pipe (6) and is equipped with multiple dispensing orifices, the cloth pencil (7) is threadedly connected to the dispensing orifice, described point
Distribution is equipped with the capping of threaded connection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201711436028.XA CN108043322A (en) | 2017-12-26 | 2017-12-26 | A kind of water treatment medicine control device for improving sewage treating efficiency |
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Application Number | Priority Date | Filing Date | Title |
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CN201711436028.XA CN108043322A (en) | 2017-12-26 | 2017-12-26 | A kind of water treatment medicine control device for improving sewage treating efficiency |
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CN108043322A true CN108043322A (en) | 2018-05-18 |
Family
ID=62128077
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CN201711436028.XA Pending CN108043322A (en) | 2017-12-26 | 2017-12-26 | A kind of water treatment medicine control device for improving sewage treating efficiency |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109925905A (en) * | 2018-06-20 | 2019-06-25 | 南京林业大学 | A kind of medicine mixer for the weak flowed fluctuation on-line mixing device of sandwich-type |
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CN204684977U (en) * | 2015-05-28 | 2015-10-07 | 西安科技大学 | Horizontal convection is sized mixing pretreatment unit |
CN205035094U (en) * | 2015-09-15 | 2016-02-17 | 常州市环境科学研究院 | Groundwater sampling and prosthetic multi -functional layering well |
CN205575688U (en) * | 2016-04-27 | 2016-09-14 | 安徽得奇环保科技股份有限公司 | Sewage treatment device adds medicine reaction tank |
CN205710024U (en) * | 2016-06-12 | 2016-11-23 | 重庆赛恩斯环保工程有限公司 | Sewage disposal chemicals dosing plant |
CN206613397U (en) * | 2017-03-15 | 2017-11-07 | 重庆长江勘测设计院有限公司 | A kind of sewage disposal air lift negative pressure dosing agitating device |
CN207822965U (en) * | 2017-12-26 | 2018-09-07 | 山东佳星环保科技有限公司 | A kind of water treatment medicine control device improving sewage treating efficiency |
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2017
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Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN204684977U (en) * | 2015-05-28 | 2015-10-07 | 西安科技大学 | Horizontal convection is sized mixing pretreatment unit |
CN205035094U (en) * | 2015-09-15 | 2016-02-17 | 常州市环境科学研究院 | Groundwater sampling and prosthetic multi -functional layering well |
CN205575688U (en) * | 2016-04-27 | 2016-09-14 | 安徽得奇环保科技股份有限公司 | Sewage treatment device adds medicine reaction tank |
CN205710024U (en) * | 2016-06-12 | 2016-11-23 | 重庆赛恩斯环保工程有限公司 | Sewage disposal chemicals dosing plant |
CN206613397U (en) * | 2017-03-15 | 2017-11-07 | 重庆长江勘测设计院有限公司 | A kind of sewage disposal air lift negative pressure dosing agitating device |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109925905A (en) * | 2018-06-20 | 2019-06-25 | 南京林业大学 | A kind of medicine mixer for the weak flowed fluctuation on-line mixing device of sandwich-type |
CN109925905B (en) * | 2018-06-20 | 2024-02-02 | 南京林业大学 | Medicine mixer for sandwich type weak flow fluctuation on-line mixing device |
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