CN106915807A - The medicament dilution device of high-efficiency concentrator - Google Patents
The medicament dilution device of high-efficiency concentrator Download PDFInfo
- Publication number
- CN106915807A CN106915807A CN201710222376.0A CN201710222376A CN106915807A CN 106915807 A CN106915807 A CN 106915807A CN 201710222376 A CN201710222376 A CN 201710222376A CN 106915807 A CN106915807 A CN 106915807A
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- China
- Prior art keywords
- dilution
- flocculant
- pipe
- tube
- mixing tube
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Links
- 238000010790 dilution Methods 0.000 title claims abstract description 50
- 239000012895 dilution Substances 0.000 title claims abstract description 50
- 239000003814 drug Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000002156 mixing Methods 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 13
- 239000000243 solution Substances 0.000 claims description 19
- 238000002347 injection Methods 0.000 claims description 15
- 239000007924 injection Substances 0.000 claims description 15
- 238000007865 diluting Methods 0.000 claims description 13
- 239000002562 thickening agent Substances 0.000 claims description 13
- 239000008394 flocculating agent Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 9
- 239000013505 freshwater Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000004090 dissolution Methods 0.000 claims description 4
- 238000003113 dilution method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims 1
- 230000003311 flocculating effect Effects 0.000 abstract 1
- 230000001502 supplementing effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/43—Mixing liquids with liquids; Emulsifying using driven stirrers
-
- 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
- B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
-
- 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
- B01F35/7176—Feed mechanisms characterised by the means for feeding the components to the mixer using pumps
-
- 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
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
-
- 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
- B01F2101/48—Mixing water in water-taps with other ingredients, e.g. air, detergents or disinfectants
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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of medicament dilution device of high-efficiency concentrator, comprising a feed bin for being used to accommodate flocculant dry powder, the bottom of described feed bin is provided with an adjustable plate and a conveying worm, an once dilution mixing tube is provided with the afterbody of described conveying worm, described once dilution body of the mixing tube comprising a cylindrical shape, the side wall tangent line of described body is provided with a clear water inlet, the bottom of described body is provided with a tail pipe, described tail pipe is connected with a dissolving tank, the downstream of described dissolving tank is provided with a storagetank, described storagetank is connected with a secondary dilution through a plunger metering pump with mixing tube, described secondary dilution mixing tube is Venturi tube mixer.Because measuring pump and filling pipe flow meter are interlocked, the diluted concentration of precise control flocculant is realized, concentration is diluted to 0.05% by 0.2%, i.e., by flocculant and water ratio by 1:499 bring up to 1:1999, flocculating effect is more preferable, so as to save dosage.
Description
Technical Field
The invention relates to a thickener, in particular to a medicament diluting device of a high-efficiency thickener.
Background
The thickener mainly has the function of realizing solid-liquid separation, has important indexes of underflow pulp concentration and overflow water turbidity, and is widely used for concentrate and tailing concentration, wastewater treatment and the like. Compared with the common thickener, the high-efficiency thickener has the advantages of large unit area treatment capacity, floor area saving, good overflow water index and the like.
The general high-efficiency thickener increases the material settling speed by a flocculant, and utilizes the adsorption action of molecular chains and mineral particles after the macromolecular organic compound is dissolved in water to form floccules and accelerate the self-settling action of the materials. The flocculant is mainly anionic powdery polyacrylamide, the number of molecules of the flocculant can reach more than 300 ten thousand, a bridge chain is formed in water, solid particles are captured to form flocculated aggregates, and sedimentation is accelerated. The amount of flocculant depends on the material properties and is generally from a few grams to a few tens of grams per ton of dry material consumed. The flocculant must be diluted to a certain concentration for preparation, which is an important step in use.
The traditional flocculating agent diluting process is that flocculating agent dry powder is directly added into an open type stirring tank, according to the required medicament concentration, new water is supplemented into the stirring tank for stirring, the new water is conveyed into a storage tank through a metering pump after being stirred, and then the medicament is conveyed to a medicament adding point of a thickener through a variable frequency metering pump.
In addition, the patent of Shanghai city sewage treatment Limited company application, a dosing device and a use method thereof (publication number CN104307399A), mainly comprise a stock bin and a preparation tank, and are characterized in that a screw feeder and a fan are arranged below the stock bin, and the stock bin is connected with the preparation tank through a pipeline. When the flocculant is used, the medicinal powder in the bin is pushed out by the screw feeder, is conveyed into the preparation tank by the fan, is mixed with fresh water and then enters the stirring tank, and the subsequent process is consistent with that of the traditional flocculant dilution method.
The traditional preparation method has the defects that medicine powder escapes, the problem of serious dust pollution is caused, the ground is sticky and slippery, the potential safety hazard problem exists, and the surrounding environment is influenced.
The common flocculant for mines is Polyacrylamide (PAM) or flocculant with similar components, the usage experience of on-site polyacrylamide is that the flocculant is diluted twice, the first dissolution concentration is controlled to be 0.1-0.3%, and the flocculant needs to be diluted twice before being added into a thickener. Neither of the above two flocculant configurations takes into account the necessity for secondary dilution of the flocculant.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art, and provides a medicament diluting device of a high-efficiency concentrator.
The technical problem of the invention is mainly solved by the following technical scheme:
the utility model provides a medicament diluting device of high-efficient concentrated machine, its characterized in that, the medicament diluting device of high-efficient concentrated machine contain one and be used for holding the feed bin of flocculating agent dry powder, the bottom of feed bin be equipped with an regulating plate and a screw conveyer the afterbody of screw conveyer be equipped with the mixing tube for the dilution one time, the mixing tube for the dilution one time contain a cylindric body, the lateral wall tangent line of body on be equipped with a clear water filling opening, the bottom of body be equipped with a tail pipe, the tail pipe be connected with a dissolving tank, the low reaches of dissolving tank be equipped with a storage tank, the storage tank be connected with the mixing tube for the dilution two times through a plunger metering pump, the mixing tube for the dilution two times contain an inlet tube, a water injection pipe and an outlet pipe, the outlet of inlet tube with the plunger metering pump be connected, the water injection pipe is connected with a fresh water supply pipe through a rotameter, and the rotameter is matched with the plunger metering pump.
In a preferred embodiment of the present invention, the mixing tube for secondary dilution is a venturi mixer.
In a preferred embodiment of the present invention, the diluted solution in the dissolution tank is delivered to the storage tank by gravity flow or by a drug pump.
As a preferred embodiment of the present invention, the fresh water supply pipe is provided with a regulating valve.
The invention also discloses a medicament diluting process utilizing the medicament diluting device of the high-efficiency concentrator, which comprises the following steps:
1) the flocculant dry powder enters the spiral conveyer through the adjusting plate;
2) injecting clear water from a clear water injection opening, preliminarily mixing dry flocculant powder and clear water in a mixing tube for primary dilution, then feeding the mixture into a dissolving tank and stirring, wherein the dilution concentration of the flocculant is 0.2% when stirring, and the stirring time is 1-2 hours;
3) storing the prepared flocculant solution in a storage tank for 5-6 hours, and continuing to hydrate to fully disperse molecular chains;
4) conveying the flocculant solution in the storage tank to an inlet pipe of a mixing pipe for secondary dilution through a plunger metering pump, adding water through a water injection pipe for secondary dilution, and controlling the concentration of the flocculant solution by matching a rotor flow meter and the plunger metering pump;
5) and conveying the flocculant solution after the secondary dilution to a pipe orifice of a thickener through an outlet pipe.
In a preferred embodiment of the present invention, the predetermined dilution concentration is 0.05%.
The medicament diluting device of the high-efficiency concentrator has the following advantages: because the self-property of the flocculating agent is fully considered, the flocculating agent solution is pumped out from the storage tank by the metering pump and is diluted for the second time with the supplementing water in the mixer, and the supplementing water pipe is provided with a flowmeter and an adjusting valve to control the supplementing water quantity. Because the metering pump is interlocked with the flowmeter on the water replenishing pipe, the dilution concentration of the flocculating agent is accurately controlled, the concentration is diluted from 0.2% to 0.05%, namely the ratio of the flocculating agent to the water is increased from 1:499 to 1:1999, so that a better flocculation effect is obtained, the dosage is saved, and the economic benefit is particularly obvious.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a chemical dilution apparatus of a high efficiency concentrator of the present invention;
wherein,
1. a storage bin; 10. a fresh water supply pipe; 2. an adjusting plate; 3. a screw conveyor; 4. a mixing tube for primary dilution; 41. a pipe body; 42. a clean water injection port; 43. a tail pipe; 5. a dissolving tank; 6. a storage tank; 7. a plunger metering pump; 8. a mixing tube for secondary dilution; 81. an inlet tube; 82. a water injection pipe; 83. an outlet pipe; 9. a rotameter.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
As shown in FIG. 1, the chemical diluting device of the high-efficiency thickener comprises a silo 1 for containing dry powder of flocculant, the bottom of the silo 1 is provided with an adjusting plate 2 and a screw conveyor 3, the tail part of the screw conveyor 3 is provided with a primary dilution mixing pipe 4, the primary dilution mixing pipe 4 comprises a cylindrical pipe body 41, a clean water injection port 42 is arranged on the tangent of the side wall of the pipe body 41, the bottom of the pipe body 41 is provided with a tail pipe 43, the tail pipe 43 is connected with a dissolving tank 5, a storage tank 6 is arranged at the downstream of the dissolving tank 5, the storage tank 6 is connected with a secondary dilution mixing pipe 8 through a plunger metering pump 7, the secondary dilution mixing pipe 8 comprises an inlet pipe 81, a water injection pipe 82 and an outlet pipe 83, the inlet pipe 81 is connected with a new outlet of the plunger metering pump 7, the water injection pipe 82 is connected with a water supply pipe 10 through a rotor flowmeter 9, the rotameter 9 is fitted with the plunger metering pump 7.
The mixing tube 8 for secondary dilution is a venturi mixer.
The diluted solution in the dissolution tank 5 is transferred to the storage tank 6 by self-flow into the storage tank 6 or by a chemical pump. A regulating valve may be further provided on the fresh water supply pipe 10 for regulating the amount of water supplied from the fresh water supply pipe 10.
The specific working process of the medicament diluting device comprises the following steps:
1. the flocculant dry powder enters a spiral conveyer 3 through an adjusting plate 2;
2. clear water is injected from the clear water injection port 42, flocculant dry powder and clear water are preliminarily mixed in the mixing pipe 4 for primary dilution, then the mixture enters the dissolving tank 5 and is stirred, the dilution concentration of the flocculant is 0.2% when the flocculant is stirred, and the stirring time is 1-2 hours;
3. the prepared flocculant solution is stored in a storage tank 6 for 5-6 hours, and is continuously hydrated, so that molecular chains are sufficiently dispersed, and the flocculation effect is improved;
4. the flocculant solution in the storage tank 6 is conveyed to an inlet pipe 81 of a mixing pipe 8 for secondary dilution after passing through the plunger metering pump 7, and is subjected to secondary dilution by adding water through a water injection pipe 82, and at this time, the rotameter 9 and the plunger metering pump 7 are mutually matched to control the concentration of the flocculant solution;
5. the flocculant solution after the second dilution is delivered to the mouth of the thickener through the outlet pipe 83. After the flocculant solution after secondary dilution enters a high-efficiency concentrator, particle agglomeration and sedimentation are accelerated, and backwater water quality is improved.
Because the self-property of the flocculating agent is fully considered, the flocculating agent solution is pumped out from the storage tank by the metering pump and is diluted for the second time with the supplementing water in the mixer, and the supplementing water pipe is provided with a flowmeter and an adjusting valve to control the supplementing water quantity. Because the metering pump is interlocked with the flowmeter on the water replenishing pipe, the dilution concentration of the flocculating agent is accurately controlled, the concentration is diluted from 0.2% to 0.05%, namely the ratio of the flocculating agent to the water is increased from 1:499 to 1:1999, so that a better flocculation effect is obtained, the dosage is saved, and the economic benefit is particularly obvious.
Without being limited thereto, any changes or substitutions that are not thought of through the inventive work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (6)
1. The utility model provides a medicament diluting device of high-efficient concentrated machine, characterized in that, the medicament diluting device of high-efficient concentrated machine contain one and be used for holding feed bin (1) of flocculating agent dry powder, the bottom of feed bin (1) be equipped with an regulating plate (2) and a screw conveyer (3) the afterbody of screw conveyer (3) be equipped with mixing tube (4) for dilution one by one, mixing tube (4) for dilution one contain a cylindric body (41), the lateral wall tangent line of body (41) on be equipped with a clear water filling opening (42), the bottom of body (41) be equipped with a tail pipe (43), tail pipe (43) be connected with a dissolving tank (5), the low reaches of dissolving tank (5) be equipped with a storage tank (6), storage tank (6) be connected with a mixing tube (8) for dilution one by a plunger metering pump (7), the mixing tube (8) for secondary dilution comprises an inlet tube (81), a water injection tube (82) and an outlet tube (83), the inlet tube (81) is connected with the outlet of the plunger metering pump (7), the water injection tube (82) is connected with a fresh water supply tube (10) through a rotameter (9), and the rotameter (9) and the plunger metering pump (7) are matched with each other.
2. The chemical dilution apparatus of a high efficiency concentrator in accordance with claim 1, wherein the secondary dilution mixing pipe (8) is a venturi mixer.
3. The chemical dilution apparatus of a high efficiency concentrator in accordance with claim 1, wherein the diluted solution in the dissolution tank (5) is automatically flowed into the storage tank (6) or is transferred into the storage tank (6) by a chemical pump.
4. The dilution apparatus for a high-efficiency thickener according to claim 1, wherein the fresh water supply pipe (10) is provided with a control valve.
5. A chemical dilution process using the chemical dilution apparatus of the high efficiency concentrator as defined in claim 1, comprising the steps of:
1) the flocculant dry powder enters a spiral conveyor (3) through an adjusting plate (2);
2) clear water is injected from a clear water injection port (42), flocculant dry powder and clear water are preliminarily mixed in a mixing tube (4) for primary dilution, then the mixture enters a dissolving tank (5) and is stirred, the dilution concentration of the flocculant is 0.2% when the flocculant is stirred, and the stirring time is 1-2 hours;
3) the prepared flocculant solution is stored in a storage tank (6) for 5-6 hours, and is continuously hydrated to fully disperse molecular chains;
4) the flocculant solution in the storage tank (6) is conveyed to an inlet pipe (81) of a mixing pipe (8) for secondary dilution after passing through a plunger metering pump (7), and is added with water through a water injection pipe (82) for secondary dilution to a preset dilution concentration, and at the moment, a rotameter (9) and the plunger metering pump (7) are matched with each other to control the concentration of the flocculant solution;
5) and the flocculant solution after the secondary dilution is conveyed to a pipe orifice of the thickener through an outlet pipe (83).
6. The reagent dilution process of claim 5, wherein the predetermined dilution concentration is 0.05%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710222376.0A CN106915807A (en) | 2017-04-07 | 2017-04-07 | The medicament dilution device of high-efficiency concentrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710222376.0A CN106915807A (en) | 2017-04-07 | 2017-04-07 | The medicament dilution device of high-efficiency concentrator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106915807A true CN106915807A (en) | 2017-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710222376.0A Pending CN106915807A (en) | 2017-04-07 | 2017-04-07 | The medicament dilution device of high-efficiency concentrator |
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| Country | Link |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107308830A (en) * | 2017-07-25 | 2017-11-03 | 广西农垦糖业集团红河制糖有限公司 | A kind of flocculant dissolved dilution device |
| CN107519796A (en) * | 2017-10-19 | 2017-12-29 | 中冶北方（大连）工程技术有限公司 | A kind of flocculant prepares and adding set |
| CN107638818A (en) * | 2017-10-26 | 2018-01-30 | 中冶北方（大连）工程技术有限公司 | Tubular type medicament preparation facilities and method |
| CN107670848A (en) * | 2017-11-15 | 2018-02-09 | 中冶北方（大连）工程技术有限公司 | A kind of microfloatation collecting agent is prepared and adding set |
| CN109846438A (en) * | 2019-03-27 | 2019-06-07 | 中万恩科技有限公司 | Distributor |
| CN112690265A (en) * | 2020-12-24 | 2021-04-23 | 吉林农业大学 | Timed pesticide spraying device and method for pest control |
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| JP2009172458A (en) * | 2008-01-21 | 2009-08-06 | Kawasetsu:Kk | Continuous flocculation treatment apparatus of polluted water |
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| CN101602532A (en) * | 2009-07-15 | 2009-12-16 | 马学范 | A kind of secondarily diluting and feeding coagulant method and equipment thereof |
| CN102276083A (en) * | 2011-06-13 | 2011-12-14 | 吴洁玲 | Treatment method for banana stem papermaking pulp wastewater |
| WO2014139969A1 (en) * | 2013-03-15 | 2014-09-18 | Ksm Water Gmbh | System for cleaning a membrane |
| CN206814461U (en) * | 2017-04-07 | 2017-12-29 | 北京东方燕京工程技术股份有限公司 | The medicament dilution device of high-efficiency concentrator |
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| JP2009172458A (en) * | 2008-01-21 | 2009-08-06 | Kawasetsu:Kk | Continuous flocculation treatment apparatus of polluted water |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107308830A (en) * | 2017-07-25 | 2017-11-03 | 广西农垦糖业集团红河制糖有限公司 | A kind of flocculant dissolved dilution device |
| CN107519796A (en) * | 2017-10-19 | 2017-12-29 | 中冶北方（大连）工程技术有限公司 | A kind of flocculant prepares and adding set |
| CN107638818A (en) * | 2017-10-26 | 2018-01-30 | 中冶北方（大连）工程技术有限公司 | Tubular type medicament preparation facilities and method |
| CN107670848A (en) * | 2017-11-15 | 2018-02-09 | 中冶北方（大连）工程技术有限公司 | A kind of microfloatation collecting agent is prepared and adding set |
| CN109846438A (en) * | 2019-03-27 | 2019-06-07 | 中万恩科技有限公司 | Distributor |
| CN109846438B (en) * | 2019-03-27 | 2024-04-12 | 中万恩科技有限公司 | Dispenser |
| CN112690265A (en) * | 2020-12-24 | 2021-04-23 | 吉林农业大学 | Timed pesticide spraying device and method for pest control |
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Application publication date: 20170704 |