CN108617467A - The system and method for preventing drip emitter from blocking - Google Patents
The system and method for preventing drip emitter from blocking Download PDFInfo
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- CN108617467A CN108617467A CN201810206381.7A CN201810206381A CN108617467A CN 108617467 A CN108617467 A CN 108617467A CN 201810206381 A CN201810206381 A CN 201810206381A CN 108617467 A CN108617467 A CN 108617467A
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- cloth
- chlorine
- mixing tube
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/16—Control of watering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/81—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
- B01F33/811—Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental Sciences (AREA)
- Soil Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention discloses a kind of systems and method that prevent drip emitter from blocking, belong to irrigation field.The system comprises：The main pipeline that water pump, water inlet end are connected to the discharge outlet of water pump the system also includes：Mixer, acid storage tank, storage chlorine tank, the first metering pump, the second metering pump；Mixer is arranged on main pipeline, including：The first mixing tube, the second mixing tube being sequentially connected to according to water (flow) direction, and the first mixing tube includes with the second mixing tube：Circular cone converging transition, isometrical section, the circular cone divergent segment being sequentially connected to according to water (flow) direction；The import and export of first metering pump is connected to the water inlet end of acid storage tank, first mixing tube respectively；The import and export of second metering pump is connected to the water inlet end of storage chlorine tank, the second mixing tube respectively.The system provided by the invention for preventing drip emitter from blocking, can both realize and accurately controlled to irrigation index, can also imitate prevents clogging drip irrigation emitter from blocking, and can reduce operating cost.
Description
Technical field
The present invention relates to the field of irrigation, more particularly to a kind of the system and method that prevent drip emitter from blocking.
Background technology
Currently, using drip irrigation system to farmland carry out irrigate be widely used, with solve agricultural water shortage and
The problems such as water and fertilizer utilization rate is low.Due to containing the impurity such as solid particulate matter, algae, chemical ion, microorganism, and this in irrigation water
Drip emitter in the easy clogging drip irrigation system of a little impurity, is unfavorable for irrigating.Therefore it provides one kind prevents drip emitter from blocking
System be very necessary.
The prior art provides a kind of system for preventing drip emitter from blocking, which includes：Water pump, main pipeline,
One branch pipe(tube), the second branch pipe(tube), third branch pipe(tube), two level Venturi tube, the fertile tank of storage, storage acid/chlorine tank, threeway；Main pipeline into
The outlet of water end (W.E.) and water pump；The two-port of first branch pipe(tube) is connected to main pipeline, and water (flow) direction is provided with first
Valve, the second valve；The two-port of second branch pipe(tube) is connected to the first port of threeway, the fertile tank of storage respectively；Third branch pipe(tube)
Two-port is connected to the second port of threeway, storage acid/chlorine tank respectively；The third port of threeway is connected to the first branch pipe(tube), and position
Between the first valve and the second valve；Third valve is provided on main pipeline, and third valve is located at the two of the first branch pipe(tube)
Between port, the 4th valve, the 5th valve are separately installed on the second branch pipe(tube), third branch pipe(tube)；Two level Venturi tube according to
Liquid flow direction is arranged in the end of the first branch pipe(tube).In application, the first acid adding into main pipeline, specially：Close third valve
Door, and the second valve, the 5th valve are opened, and the aperture of the second valve is less than the aperture of the 5th valve, stores up the acid in acid/chlorine tank
Liquid will pass through two level Venturi tube under differential pressure action and be inhaled into main pipeline, and system is made to be in weak acidic condition；Then, to supervisor
Chlorination in road, specially：Third valve is closed, and opens the second valve, the 5th valve, and the aperture of the second valve is less than the 5th
The aperture of valve, the chlorine liquid stored up in acid/chlorine tank will pass through two level Venturi tube under differential pressure action and be inhaled into main pipeline, with drop
Filling is flowed out after being mixed with water.
The inventor finds that the existing technology has at least the following problems：
Above-mentioned two level Venturi tube needs to ensure the aperture that the aperture of the second valve is less than the 5th valve when in use, this consumption
The head of drip irrigation system 3m~5m, increases the operating cost of drip irrigation system；Meanwhile the two level Venturi tube is in use
Sensitive is reacted to the fluid flow of main pipeline, pressure change, is unfavorable for realizing to the accurate of irrigation index (such as irrigation time)
Control；Meanwhile the prior art, when Controlled irrigation device blocks, acid adding and chlorination process are asynchronous, cannot utmostly ensure to add
The validity for entering chlorine reduces the effectiveness that acid adding/chlorination method blocks control system.
Invention content
An embodiment of the present invention provides a kind of systems and method that prevent drip emitter from blocking, can solve above-mentioned ask
Topic.The technical solution is as follows：
On the one hand, a kind of system for preventing drip emitter from blocking is provided, the system comprises：Water pump, water inlet end with
The main pipeline of the discharge outlet connection of the water pump；
The system also includes：Mixer, acid storage tank, storage chlorine tank, the first metering pump, the second metering pump；
The mixer is arranged on the main pipeline, including：The first mixing tube for being sequentially connected to according to water (flow) direction,
Two mixing tubes, and first mixing tube includes with second mixing tube：The circular cone being sequentially connected to according to water (flow) direction is gradually
Contracting section, isometrical section, circular cone divergent segment；
The import and export of first metering pump is connected to the water inlet end of the acid storage tank, first mixing tube respectively；
The import and export of second metering pump is connected to the water inlet end of the storage chlorine tank, second mixing tube respectively.
In a kind of possible design, the angle between the side wall and central shaft of the circular cone converging transition is 29 °~31 °,
Angle between the side wall and central shaft of the circular cone divergent segment is 29 °~31 °；
The circular cone converging transition, the circular cone divergent segment maximum gauge be 1.9 times~the 2.1 of the isometrical section of diameter
Times.
In a kind of possible design, the mixer further includes：First cloth cyclome, the second cloth cyclome；
The first cloth cyclome be mounted on first mixing tube water inlet end at, and with the outlet of first metering pump
Connection；
The second cloth cyclome be mounted on second mixing tube water inlet end at, and with the outlet of second metering pump
Connection.
In a kind of possible design, the mixer further includes：Outer tube is provided with the outlet with first metering pump
First feeding opening of connection, the second feeding opening with the outlet of second metering pump；
The first cloth cyclome, first mixing tube, the second cloth cyclome, second mixing tube both ends with
The inner wall of the outer tube offsets；
The first cloth cyclome is circumferentially equipped with multiple first cloth pencils, and each first cloth pencil with it is described
First feeding opening penetrates through；
The second cloth cyclome is circumferentially equipped with multiple second cloth pencils, and each second cloth pencil with it is described
Second feeding opening penetrates through.
In a kind of possible design, the first cloth pencil is arranged along the radial direction of the first cloth cyclome, and opposite
The length of two the first cloth pencils is identical；
The second cloth pencil is arranged along the radial direction of the second cloth cyclome, and two opposite the second cloth pencils
Length is identical.
In a kind of possible design, the system also includes：It is sequentially arranged on the main pipeline along water (flow) direction
Butterfly valve and non-return valve.
On the other hand, a kind of method for preventing drip emitter from blocking is provided, the method includes：
Using the first metering pump, the acid solution in acid storage tank is injected into the first mixing tube of mixer with the first preset flow
It is interior, meanwhile, using the second metering pump, the chlorine liquid in chlorine tank will be stored up and second mixed so that the second preset flow is injected into the mixer
It closes in pipe；
The acid solution, the chlorine liquid are mixed with the irrigation water in main pipeline, to inhibit tamper in drip emitter
Growth；
Wherein, first mixing tube, second mixing tube by the circular cone converging transition that is sequentially connected to, isometrical section,
Circular cone divergent segment is used to mix the chlorine liquid, the acid solution and the irrigation water.
In a kind of possible design, the acid solution is sulfuric acid solution, and the chlorine liquid is liquor natrii hypochloritis.
In a kind of possible design, first preset flow is calculated by following calculation formula：
QStorage acid=QMain pipeline×Cd/CStorage acid×1000
In formula：
QStorage acidFirst preset flow, L/h；
QMain pipelineFlow of the irrigation water in the main pipeline, m3/h；
CStorage acidSulfuric acid concentration in the acid storage tank, %；
CdThe irrigation water pH is adjusted to sulfuric acid concentration when 6.3~6.7, %.
In a kind of possible design, second preset flow is calculated by following calculation formula：
QStore up chlorine=QMain pipeline×1000×(Cr+Cs)/CStore up chlorine
In formula：
QStore up chlorineSecond preset flow, L/h；
CrThe terminal residual chlorine concentration of the irrigation water, takes 1.5~2.5mg/L；
CsThe irrigation water itself expends residual chlorine concentration, mg/L；
CStore up chlorineEffective chlorine density in the storage chlorine tank, mg/L.
In a kind of possible design, the residual chlorine concentration that itself expends obtains by the following method：
Injected into container the irrigation water, available chlorine content be 0.2% liquor natrii hypochloritis, and the irrigation water with
The addition total volume of the liquor natrii hypochloritis is 1L；
The container is rocked, and the residual chlorine concentration in the container is measured using chlorine residue meter, if the chlorine residue in the container
Concentration is more than or less than the terminal residual chlorine concentration, decreases or increases the addition of liquor natrii hypochloritis described in the container,
Until the residual chlorine concentration in the container is equal to the terminal residual chlorine concentration；
Itself consuming residual chlorine concentration is calculated using following calculation formula：
Cs=V × 2-Cr
In formula：
The addition of liquor natrii hypochloritis described in V-, ml.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
The system provided in an embodiment of the present invention for preventing drip emitter from blocking, passes through the first metering pump, the second metering pump
Control respectively acid solution, chlorine liquid injection flow, not only contribute to realize irrigation index accurately controlled, and can avoid making
The injection flow that acid solution, chlorine liquid are adjusted with valve, simplifies operating procedure, is conducive to the promotion and application of the system；Pass through
First mixing tube and the second mixing tube are installed on main pipeline, and the first mixing tube includes that circular cone is tapered with the second mixing tube
Section, isometrical section, circular cone divergent segment, can both be such that the acid solution of addition and chlorine liquid is quickly uniformly mixed with the irrigation water in main pipeline, and
And also can avoid consuming the head of irrigation system 3m~5m because using Venturi tube, reduce operating cost；In addition, by storing up acid
Tank, storage chlorine tank can inject acid solution, chlorine liquid into mixer simultaneously, this not only can guarantee that irrigation water is in weakly acidic condition, can be had
Effect prevents clogging drip irrigation emitter from blocking, and can reduce the addition of chlorine liquid, can improve the economy of chlorination operation.
To sum up, the system provided in an embodiment of the present invention for preventing drip emitter from blocking, can both realize and accurately controlled to irrigation index,
Also can imitate prevents clogging drip irrigation emitter from blocking, and can reduce operating cost.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structural schematic diagram of the system provided in an embodiment of the present invention for preventing drip emitter from blocking；
Fig. 2 is the structural schematic diagram of mixer provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the first cloth cyclome provided in an embodiment of the present invention；
Fig. 4 is the schematic side view of the first cloth cyclome provided in an embodiment of the present invention.
Wherein, each label declaration in attached drawing is as follows：
1- water pumps；
2- main pipelines；
3- mixers；
The first mixing tubes of 301-；
The second mixing tubes of 302-；
3a- circular cone converging transitions；
Isometrical section of 3b-；
3c- circular cone divergent segments；
303- the first cloth cyclomes；
303a- the first cloth pencils；
304- the second cloth cyclomes；
304a- the second cloth pencils；
305- outer tubes；
The first feeding openings of 305a-；
The second feeding openings of 305b-；
306- ring flanges；
307- spacing rings；
4- acid storage tanks；
5- stores up chlorine tank；
The first metering pumps of 6-；
The first branch pipe(tube)s of 601-；
The second metering pumps of 7-；
The second branch pipe(tube)s of 701-；
8- butterfly valves；
9- non-return valves；
10- filters；
11- pressure gauges；
12- flowmeters.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
An embodiment of the present invention provides a kind of systems for preventing drip emitter from blocking, as shown in Fig. 1, the system packet
It includes：The main pipeline 2 that water pump 1, water inlet end are connected to the discharge outlet of water pump 1；Further, which further includes：Mixer 3, storage
Sour tank 4, storage chlorine tank 5, the first metering pump 6, the second metering pump 7；Wherein, mixer 3 is arranged on main pipeline 2, including：According to water
The first mixing tube 301, the second mixing tube 302 (referring to attached drawing 2) that stream direction is sequentially connected to, and the first mixing tube 301 and second
Mixing tube 302 includes：The circular cone converging transition 3a that is sequentially connected to according to water (flow) direction, isometrical section of 3b, circular cone divergent segment 3c (referring to
Attached drawing 2)；In addition, the import and export of the first metering pump 6 is connected to the water inlet end of acid storage tank 4, the first mixing tube 301 respectively；Second
The import and export of metering pump 7 is connected to the water inlet end of storage chlorine tank 5, the second mixing tube 302 respectively.
It is understood that the water inlet end of the first mixing tube 301 refers to the end that irrigation water flows into the first mixing tube 301
Mouthful, i.e. the water inlet end of the circular cone converging transition 3a of the first mixing tube 301；Similarly, the water inlet end of the second mixing tube 302 refers to
The port that irrigation water flows into two mixing tubes 302, the i.e. water inlet end of the circular cone converging transition 3a of the second mixing tube 302.In addition, first
Isometrical section 3b sections in mixer 301, the second mixer 302 refer to the constant pipeline section of diameter.
The operation principle with regard to the system provided in an embodiment of the present invention for preventing drip emitter from blocking, which is given, below describes：
In application, irrigation water is injected into main pipeline 2 using water pump 1, and will be in acid storage tank 4 using the first metering pump 6
Acid solution (such as sulfuric acid solution) is injected into the first preset flow in the first mixing tube 301 of mixer 3, and utilizes second simultaneously
Metering pump 7 by store up the chlorine liquid (such as liquor natrii hypochloritis) in chlorine tank 5 with the second preset flow be injected into mixer 3 it is second mixed
It closes in pipe 302, acid solution, chlorine liquid is mixed with irrigation water, so that irrigation water is in weakly acidic condition, and then prevent using chlorine liquid
Only microbial metabolism formation biomembrane can effectively prevent blocking to inhibit the growth of tamper in drip emitter in irrigation water
Drip emitter blocks.
It is available since the first mixing tube 301 and the second mixing tube 302 include circular cone converging transition 3a and circular cone divergent segment 3c
The multistage gradual change of cross section makes the acid solution of addition and chlorine liquid are quickly uniformly mixed with the irrigation water in main pipeline 2, avoid chlorine liquid with
Vigorous reaction occurs for acid solution, and the stability of the system can be improved, so as to realize safe and efficient chlorination operation.
As it can be seen that the system provided in an embodiment of the present invention for preventing drip emitter from blocking, passes through the first metering pump 6, second
Metering pump 7 control respectively acid solution, chlorine liquid injection flow, not only contribute to realize irrigation index accurately controlled, and
The injection flow that can avoid being adjusted acid solution, chlorine liquid using valve, is simplified operating procedure, is conducive to the popularization of the system and answers
With；By installing the first mixing tube 301 and the second mixing tube 302 on main pipeline 2, and the first mixing tube 301 is mixed with second
Pipe 302 includes circular cone converging transition 3a, isometrical section of 3b, circular cone divergent segment 3c, can both make the acid solution and chlorine liquid and main pipeline 2 of addition
Interior irrigation water is quickly uniformly mixed, and can avoid consuming the head of irrigation system 3m~5m because using Venturi tube,
Reduce operating cost；In addition, can inject acid solution, chlorine liquid into mixer 3 simultaneously by acid storage tank 4, storage chlorine tank 5, this not only may be used
Ensure that irrigation water is in weakly acidic condition, can effectively prevent clogging drip irrigation emitter and block, and chlorine liquid can be reduced
Addition can improve the economy of chlorination operation.
To sum up, the system provided in an embodiment of the present invention for preventing drip emitter from blocking, can both realize to irrigation index
It accurately controls, can also imitate prevents clogging drip irrigation emitter from blocking, and can reduce operating cost.
In order to further make acid solution and chlorine liquid are quickly uniformly mixed with the irrigation water in main pipeline 2, in the embodiment of the present invention,
Angle between the side wall and central shaft of circular cone converging transition 3a be 29 °~31 ° (for example, the angle may be configured as 29 °,
30 °, 31 ° etc.), the angle between the side wall and central shaft of circular cone divergent segment 3c is 29 °~31 °, and (for example, which can set
It is set to 29 °, 30 °, 31 ° etc.)；Circular cone converging transition 3a, circular cone divergent segment 3c maximum gauge be 1.9 times of isometrical section of 3b diameter
~2.1 times (for example, may be configured as 1.9 times, 2.0 times, 2.1 times etc.).
Circular cone converging transition 3a, isometrical section of 3b, the circular cone divergent segment 3c of 301 and second mixing tube 302 of above-mentioned first mixing tube
Can integrated molding, with ensure the first mixing tube 301 and the second mixing tube 302 intensity.
In order to make acid solution, chlorine liquid be evenly distributed in the first mixing tube 301, the second mixing tube 302, as shown in Fig. 2, this
In inventive embodiments, mixer 3 further includes：First cloth cyclome 303, the second cloth cyclome 304；First cloth cyclome 303 is mounted on the
At the water inlet end of one mixing tube 301, and with the outlet of the first metering pump 6；Second cloth cyclome 304 is mounted on the second mixing tube
At 302 water inlet end, and with the outlet of the second metering pump 7.
In application, the acid solution in acid storage tank 4 is injected into the first cloth cyclome 303 using the first metering pump 6, the first cloth medicine
Acid solution is uniformly distributed into the first mixing tube 301 by ring 303, and then uniform with the irrigation water that flows into the first mixing tube 301
Mixing；Similarly, the chlorine liquid stored up in chlorine tank 5 is injected into the second cloth cyclome 304 using the second metering pump 7, the second cloth cyclome
304 are uniformly distributed into acid solution into the second mixing tube 302, and then equal with the acid solution, irrigation water that flow into the second mixing tube 302
Even mixing.
Further, such as attached in order to make acid solution, chlorine liquid be evenly distributed in the first mixing tube 301, the second mixing tube 302
Shown in Fig. 2, in the embodiment of the present invention, which further includes：Outer tube 305 is provided with and the first metering pump 6 on outer tube 305
First feeding opening 305a of outlet, the second feeding opening 305b with the outlet of the second metering pump 7；First cloth cyclome
303, the inner wall of the first mixing tube 301, the second cloth cyclome 304, the second mixing tube 302 along the both ends of outer tube 305 with outer tube 305
It offsets；First cloth cyclome 303 circumferentially installs multiple first cloth pencil 303a (referring to attached drawing 3), and each first cloth pencil
303a is penetrated through with the first feeding opening 305a；Second cloth cyclome 304 circumferentially installs the second multiple cloth pencil 304a (referring to attached
Fig. 2), and each first cloth pencil 303a is penetrated through with the second feeding opening 305b.
It is understood that due to the first cloth cyclome 303, the second cloth cyclome 304 both ends with the inner wall phase of outer tube 305
Support, then illustrate the first cloth cyclome 303, the left and right outer end diameter of the second cloth cyclome 304 be all higher than middle part outer diameter (referring to attached drawing 4),
It can make the first cloth cyclome 303, the middle part of the second cloth cyclome 304 forms annular space, and the first cloth medicine with the inner wall of outer tube 305
Annular space corresponding to ring 303 is penetrated through with the first feeding opening 305a, the first cloth pencil 303a respectively, allows for each the in this way
One cloth pencil 303a is connected to by the annular space with the first feeding opening 305a；Annular corresponding to second cloth cyclome 304 is empty
Between penetrated through respectively with the second feeding opening 305b, the second cloth pencil 304a, allow for each second cloth pencil 304a in this way and pass through
The annular space is connected to the second feeding opening 305a.
In application, the acid solution in acid storage tank 4 is noted by the first feeding opening 305a of outer tube 305 using the first metering pump 6
Enter to the first cloth cyclome 303 and be formed by annular space with outer tube 305, then the acid solution is by the of the first cloth cyclome 303
One cloth pencil 303a is entered in the first mixing tube 301, and then is uniformly mixed with the irrigation water flowed into the first mixing tube 301
It closes；Similarly, the chlorine liquid stored up in chlorine tank 5 is injected into the by the second feeding opening 305b of outer tube 305 using the second metering pump 7
In the annular space that two cloth cyclomes 304 are formed with outer tube 305, then the chlorine liquid passes through the second cloth pencil of the second cloth cyclome 304
304a is entered in the second mixing tube 302, and then is uniformly mixed with the irrigation water that flows into the second mixing tube 302, acid solution.
As it can be seen that by circumferentially disposed multiple first cloth pencil 303a in the first cloth cyclome 303, both acid solution can uniformly be added
Enter to the first mixing tube 301, and stirred fluid can be played the role of, acid solution and the mixing velocity of irrigation water can be accelerated；Equally
Chlorine liquid can be both uniformly added into second and mixed by circumferentially disposed multiple second cloth pencil 304a in the second cloth cyclome 304 by ground
It closes in pipe 302, and stirred fluid can be played the role of, the mixing velocity of chlorine liquid, acid solution and irrigation water can be accelerated.
Wherein, the first cloth pencil 303a can be corrosion resistant steel pipe, and the mode of welding or the mode of threaded connection can be used
It is arranged in the circumferential direction of the first cloth cyclome 303；Similarly, the second cloth pencil 304a can be corrosion resistant steel pipe, and welding can be used
Mode or the mode of threaded connection be arranged in the circumferential direction of the second cloth cyclome 304.
Further, in order to make acid solution, chlorine liquid be evenly distributed in the first mixing tube 301, the second mixing tube 302, such as
Shown in attached drawing 3, in the embodiment of the present invention, multiple first cloth pencil 303a are arranged along the radial direction of the first cloth cyclome 303, and opposite
Two the first cloth pencil 303a length it is identical；Multiple second cloth pencil 304a are arranged along the radial direction of the second cloth cyclome 304,
And the length of two opposite the second cloth pencil 304a is identical.
It should be noted that two opposite the first cloth pencil 303a refer to two the first cloth medicines of center overlapping of axles
Pipe 303a；Similarly, two opposite the second cloth pencil 304a refer to two the second cloth pencil 304a of center overlapping of axles.
Wherein, the first cloth pencil 303a, the second cloth pencil 304a number may be configured as 6, the embodiment of the present invention is not
Concrete restriction is carried out to the number of the first cloth pencil 303a, the second cloth pencil 304a.
In the embodiment of the present invention, the water inlet end of outer tube 305, water outlet are both provided with ring flange 306, that is, use flanged joint
Mode be arranged on main pipeline 2, be convenient for mixer 3 dismounting.
About the first cloth cyclome 303, the first mixing tube 301, the second cloth cyclome 304, the second mixing tube 302 in outer tube 305
Interior mounting means, if the length of the first cloth cyclome 303, the first mixing tube 301, the second cloth cyclome 304 and the second mixing tube 302
The sum of be equal to the length of outer tube 305, and 306 internal diameter of ring flange of 305 water inlet end of outer tube is less than the internal diameter of outer tube 305, can be by the
One cloth cyclome 303, the first mixing tube 301, the second cloth cyclome 304 and the second mixing tube 302 are directly placed in outer tube 305, are made
The ring flange 306 of first cloth cyclome 303, the second cloth cyclome 304 respectively with 305 water inlet end of outer tube, water outlet offsets；If conversely,
The sum of length of first cloth cyclome 303, the first mixing tube 301, the second cloth cyclome 304 and the second mixing tube 302 is less than outer tube 305
Length, and 306 internal diameter of ring flange of 305 water inlet end of outer tube be less than outer tube 305 internal diameter (referring to attached drawing 2), can be in outer tube 305
Inside setting spacing ring 307 (such as in outer tube 305 close to water outlet inside be arranged spacing ring 307), so that the first cloth
After cyclome 303, the first mixing tube 301, the second cloth cyclome 304 and the second mixing tube 302 are placed in outer tube 305, cross does not occur
To movement.
As shown in Fig. 1, in the embodiment of the present invention, which further includes：It is sequentially arranged in the supervisor along water (flow) direction
Butterfly valve 8 on road 2 and non-return valve 9.By the way that butterfly valve 8 is arranged on main pipeline 2, it is adjusted convenient for the flow to irrigation water；And
Butterfly valve 8 has the characteristics that simple in structure, processing easy to produce.In addition, by the way that non-return valve 9 is arranged in the rear end of butterfly valve 8, can prevent
Irrigation return flow in main pipeline 2, and then can avoid pollution iirigation water source.
In addition, as shown in Fig. 1, in the embodiment of the present invention, filter 10, pressure gauge are also respectively provided on main pipeline 2
11, flowmeter 12.By the way that filter 10 is arranged on main pipeline 2, it is miscellaneous that solid particulate matter, algae in irrigation water etc. can be removed
Matter；By the way that pressure gauge 11 is arranged on main pipeline 2, can the real time inspection system pressure, to ensure that drip irrigation system is required
Operating pressure；By the way that flowmeter 12 is arranged on main pipeline 2, the flow of the system can be read, to ensure the trouble-free operation of trickle irrigation.
Wherein, butterfly valve 8, non-return valve 9, filter 10, pressure gauge 11 are respectively positioned on the upstream of mixer 3 with flowmeter 12, just
It is controlled in irrigation index.
In the embodiment of the present invention, as shown in Fig. 1, the outlet of the first metering pump 6 is mixed by the first branch pipe(tube) 601 and first
The water inlet end connection of pipe 301 is closed, and the first branch pipe(tube) 601 is provided with the first ball valve；Similarly, the outlet of the second metering pump 7 is logical
It crosses the second branch pipe(tube) 701 to be connected to the water inlet end of the second mixing tube 302, and the second branch pipe(tube) 701 is provided with the second ball valve.
By the way that the first ball valve is arranged on the first branch pipe(tube) 601, and second ball valve is set on the second branch pipe(tube) 701,
Convenient for the trouble-free operation of drip irrigation system, if for example, the water quality reaching standard of dripping irrigation water, without being inhibited in irrigation water using chlorine liquid
When microbial metabolism forms biomembrane, the first ball valve, the second ball valve can be closed, is only delivered to dripping irrigation water by drip emitter
Crops.
In addition, in order to save energy expenditure, the first metering pump 6 in the embodiment of the present invention can pass through with the second metering pump 7
The form of double end diaphragm metering pump is configured, so only can be by can be according to system to acid solution under the drive of 1 motor
Injection flow is set separately with the different demands of chlorine liquid, therefore saves power consumption.
Wherein, double end diaphragm metering pump refers to the dress that two metering pump independently workings can be driven by 1 motor
It sets.
Second aspect, an embodiment of the present invention provides a kind of method for preventing drip emitter from blocking, this method includes：
Step 101, using the first metering pump 6, the acid solution in acid storage tank 4 is injected into mixer 3 with the first preset flow
The first mixing tube 301 in, meanwhile, using the second metering pump 7, the chlorine liquid stored up in chlorine tank 5 is injected into the second preset flow
In second mixing tube 302 of mixer 3.
Step 102, acid solution, chlorine liquid are mixed with the irrigation water in main pipeline 2, to inhibit tamper in drip emitter
Growth；
Wherein, the first mixing tube 301, the second mixing tube 302 by the circular cone converging transition 3a that is sequentially connected to, isometrical section
3b, circular cone divergent segment 3c are used to mix chlorine liquid, acid solution and irrigation water.
The method provided in an embodiment of the present invention for preventing drip emitter from blocking, passes through the first metering pump 6, the second metering pump
7 are separately added into acid solution and chlorine liquid into mixer 3 simultaneously realizes the prevention and control blocked to drip emitter, can make filling by acid liquid
It irrigates water and is maintained at weak acid environment, the validity that chlorine liquid is added can be significantly improved, prevent drip emitter from sending out in realization chlorination liquid
It can obviously reduce the usage amount of chlorine liquid while raw blocking, improve the economy of chlorination operation.
Just each step of the method provided in an embodiment of the present invention for preventing drip emitter from blocking is described below：
In a step 101, using the first metering pump 6, the acid solution in acid storage tank 4 is injected into mixing with the first preset flow
In first mixing tube 301 of device 3, meanwhile, using the second metering pump 7, the chlorine liquid stored up in chlorine tank 5 is injected with the second preset flow
To the second mixing tube 302 of mixer 3.
Specially：Irrigation water is injected into main pipeline 2 using water pump 1, and will be in acid storage tank 4 using the first metering pump 6
Acid solution is injected into the first preset flow in the first mixing tube 301 of mixer 3, and utilizes the second metering pump 7 that will store up chlorine simultaneously
Chlorine liquid in tank 5 is injected into the second preset flow in the second mixing tube 302 of mixer 3.
In order to improve the validity and economy of chlorination operation, the addition time of acid solution and chlorine liquid is 1.9h~2.1h, is lifted
For example, the addition time may be configured as 1.9h, 2.0h, 2.1h etc..
Acid solution in the step is sulfuric acid solution, and chlorine liquid is liquor natrii hypochloritis.Wherein, after irrigation water is added in sodium hypochlorite
It can partly hydrolyze, generate the hypochlorous acid with strong oxidizing property, can inhibit the metabolism of bacterium in irrigation water, and then can prevent from giving birth to
The formation of object film.
Further, in order to avoid acid adding amount is insufficient or excessive, in the embodiment of the present invention, the first of sulfuric acid solution is default
Flow is calculated by following calculation formula：
QStorage acid=QMain pipeline×Cd/CStorage acid×1000
In formula：
QStorage acid- the first preset flow, L/h；
QMain pipelineFlow of the irrigation water in main pipeline 2, m3/h；
CStorage acidSulfuric acid concentration in acid storage tank 4, %；
CdIrrigation water pH is adjusted to sulfuric acid concentration when 6.3~6.7, %.
Wherein, excessively high in view of the common sulfuric acid concentration in market (mass fraction of sulfuric acid is 98%), it is short after addition irrigation water
Amount of heat can be released in phase, be unfavorable for the stabilization of system, therefore the sulfuric acid concentration in the acid storage tank 4 in above-mentioned calculation formula takes
5%, this not only lowers high-concentration sulfuric acids to the potential risk of human body and system safety, but also can accelerate sulfuric acid in main pipeline
Mixing velocity in 2 and uniformity coefficient.
The concentrated sulfuric acid (the density 1.84g/cm that the solution that above-mentioned sulfuric acid concentration is 5% can be 98% by sulfuric acid concentration3) into
Row dilutes, and the above-mentioned concentrated sulfuric acid that 28.6mL can be added when dilution according to 1L water be configured.
Furthermore, it is contemplated that the validity and economy of chlorination, during the present invention is implemented, are added the pH value of the irrigation water after sulfuric acid
Take 6.3~6.7, for example, desirable 6.3,6.4,6.5,6.6,6.7 etc..
In view of in irrigation water containing largely can with the CO that react of acid solution is added3 2-And HCO3 -Plasma, therefore irrigation water
PH adjusts acid adding amount and is closely related with irrigation water water quality, and its can not simply according in acid-base neutralization reaction based on H+Concentration pair adds
Acid amount is calculated, therefore the embodiment of the present invention proposes a kind of acid adding concentration acquisition methods based on examination survey method, with the pH of irrigation water
For 6.5, concrete operations are as follows：
Step a1, the pH value of irrigation water is measured using pH analyzers.
Step b1, the container bottle of 5 1L is rinsed using irrigation water, and the filling of 800mL is added into each container bottle respectively
Irrigate water.
Step c1,0.1mL, 0.2mL, 0.3mL, 0.4mL and 0.5mL sulfuric acid solution (sulphur is added into 5 container bottles respectively
Acid concentration is 98%, density 1.84g/cm3), and filled it up with each container bottle using irrigation water, and screw on bottle cap and shake up and down
It is even.
Step d1, the pH value of solution in each container bottle is measured respectively using pH analyzers, if pH value is not equal to 6.5,
The addition of sulfuric acid solution in each container bottle bottle is increased or decreased, until the pH value of solution is equal to 6.5 in any one container bottle.
Step e1, sulfuric acid concentration when irrigation water pH is adjusted to 6.5 is obtained according to following calculation formula：
Cd=VIt is dense×1.84×0.98/1000
In formula：
VIt is denseThe addition volume of sulfuric acid solution, mL.
Wherein, when the pH of irrigation water is 8, its pH is adjusted to after 6.5, the sulfuric acid concentration of being added is in irrigation water
0.01%.
Further, in order to avoid adding sodium hypochlorite amount insufficient or excess, in the embodiment of the present invention, liquor natrii hypochloritis
The second preset flow be calculated by following calculation formula：
QStore up chlorine=QMain pipeline×1000×(Cr+Cs)/CStore up chlorine
In formula：
QStore up chlorine- the second preset flow, L/h；
QMain pipelineFlow of the irrigation water in main pipeline, m3/h；
CrThe terminal residual chlorine concentration of irrigation water, takes 1.5~2.5mg/L；
CsIrrigation water itself expends residual chlorine concentration, mg/L；
CStore up chlorineThe effective chlorine density in chlorine tank 5 is stored up, 2000mg/L is taken.
It should be noted that the effective chlorine density in storage chlorine tank 5 refers to the comparable chlorine dose of oxidability in sodium hypochlorite；
The terminal residual chlorine concentration of irrigation water refers to the effective chlorine density that irrigation water is discharged by irrigation system end drip emitter.
Wherein, in order to improve the uniformity coefficient that sodium hypochlorite mixes in main pipeline 2, during the present invention is implemented, in storage chlorine tank 5
Effective chlorine density be 2000mg/L, corresponding available chlorine content is 0.2%, is less than market common liquor natrii hypochloritis
Available chlorine content (for 10%).
Furthermore, it is contemplated that the validity and economy of chlorination and the environmental problem in farmland, during the present invention is implemented, are irrigated
The terminal residual chlorine concentration of water is 1.5~2.5mg/L, for example, desirable 1.5mg/L, 2mg/L, 2.5mg/L etc..
In view of in irrigation water containing largely can with the reducing substances that react of sodium hypochlorite are added, and consume it is a large amount of plus
Enter the effective chlorine in irrigation water, then the terminal residual chlorine concentration of irrigation water and the water quality of irrigation water are closely related, and are difficult to pass through water
Accurately consumption of the dripping irrigation water to effective chlorine is calculated in the measurement of part index number in matter.Therefore it is provided in the embodiment of the present invention
A method of obtaining irrigation water itself expends residual chlorine concentration, specially：
Step a2, into container inject irrigation water, available chlorine content be 0.2% liquor natrii hypochloritis, and irrigation water with
The addition total volume of liquor natrii hypochloritis is 1L.
Step b2, container is rocked, and the residual chlorine concentration in container is measured using chlorine residue meter, if the residual chlorine concentration in container is big
In or less than terminal residual chlorine concentration, the addition of liquor natrii hypochloritis in container is decreased or increased, until the chlorine residue in container is dense
Degree is equal to terminal residual chlorine concentration；
Step c2, it calculates itself using following calculation formula and expends residual chlorine concentration：
Cs=V × 2-Cr
In formula：
The addition of V- liquor natrii hypochloritis, ml.
In use, for the ease of obtaining itself above-mentioned consuming residual chlorine concentration, it can specifically with the following method：Using irrigation
Water rinses the black light resistant container bottle of 5 1L, and the irrigation water of 800mL is added into each container bottle respectively；Hold respectively to 5
0.5mL, 1mL, 1.5mL, 2mL and 2.5mL liquor natrii hypochloritis (available chlorine content 0.2%) are added in device bottle, and uses filling
It irrigates water to fill it up with each container bottle, and screws on bottle cap and shake up up and down；Solution in each container bottle is measured respectively using chlorine residue instrument
Residual chlorine concentration value increases or decreases if residual chlorine concentration value is not equal to terminal residual chlorine concentration (such as 2mg/L) in each container bottle bottle
The addition of liquor natrii hypochloritis, until any one container bottle in solution residual chlorine concentration be equal to terminal residual chlorine concentration (such as
2mg/L)；Finally, according to above-mentioned calculation formula, obtain irrigation water itself expends residual chlorine concentration.
In a step 102, acid solution, chlorine liquid are mixed with the irrigation water in main pipeline 2, to inhibit to block up in drip emitter
The growth of plug thing.
Specifically, acid solution, chlorine liquid are mixed after flowing into mixer 3 with the irrigation water in main pipeline 2, make irrigation water
In weakly acidic condition, to prevent microbial metabolism in irrigation water from forming biomembrane using chlorine liquid, to inhibit in douche
The growth of tamper can effectively prevent clogging drip irrigation emitter to block.
To sum up, the method provided in an embodiment of the present invention for preventing drip emitter from blocking, passes through the flow and pH of irrigation water
Value determines the injection flow of acid solution, and true by flow and terminal residual chlorine concentration, itself the consuming residual chlorine concentration of irrigation water
Determine the injection flow of chlorine liquid, it can be achieved that drip irrigation system accurate acid adding and chlorination, avoid acid adding and chlorine dosage insufficient or excessive,
And then maintain drip irrigation system and farm environment safety.
The alternative embodiment that any combination forms the disclosure may be used, herein no longer in above-mentioned all optional technical solutions
It repeats one by one.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of system for preventing drip emitter from blocking, including：The discharge outlet company of water pump (1), water inlet end and the water pump (1)
Logical main pipeline (2)；
It is characterized in that, the system also includes：Mixer (3), acid storage tank (4), storage chlorine tank (5), the first metering pump (6), the
Two metering pumps (7)；
The mixer (3) is arranged on the main pipeline (2), including：The first mixing tube being sequentially connected to according to water (flow) direction
(301), the second mixing tube (302), and first mixing tube (301) includes with second mixing tube (302)：According to water
Circular cone converging transition (3a), isometrical section (3b), the circular cone divergent segment (3c) that stream direction is sequentially connected to；
The import and export of first metering pump (6) respectively with the acid storage tank (4), the water inlet end of first mixing tube (301)
Connection；
The import and export of second metering pump (7) respectively with it is described storage chlorine tank (5), second mixing tube (302) water inlet end
Connection.
2. system according to claim 1, which is characterized in that between the side wall and central shaft of the circular cone converging transition (3a)
Angle be 29 °~31 °, the angle between the side wall and central shaft of the circular cone divergent segment (3c) is 29 °~31 °；
The circular cone converging transition (3a), the circular cone divergent segment (3c) maximum gauge be described isometrical section of (3b) diameter
1.9 times~2.1 times.
3. system according to claim 1, which is characterized in that the mixer (3) further includes：First cloth cyclome (303),
Second cloth cyclome (304)；
The first cloth cyclome (303) be mounted on first mixing tube (301) water inlet end at, and with first metering pump
(6) outlet；
The second cloth cyclome (304) be mounted on second mixing tube (302) water inlet end at, and with second metering pump
(7) outlet.
4. system according to claim 3, which is characterized in that the mixer (3) further includes：Outer tube (305), is provided with
With the first feeding opening (305a) of the outlet of first metering pump (6) and the outlet of second metering pump (7)
The second feeding opening (305b)；
The first cloth cyclome (303), first mixing tube (301), the second cloth cyclome (304), second mixing
Inner wall of the both ends of (302) with the outer tube (305) is managed to offset；
The first cloth cyclome (303) is circumferentially equipped with multiple first cloth pencils (303a), and each first cloth pencil
(303a) is penetrated through with first feeding opening (305a)；
The second cloth cyclome (304) is circumferentially equipped with the second multiple cloth pencils (304a), and each second cloth medicine
(304a) is managed to penetrate through with second feeding opening (305b).
5. system according to claim 4, which is characterized in that the first cloth pencil (303a) is along the first cloth cyclome
(303) radial setting, and the length of two opposite the first cloth pencils (303a) is identical；
The second cloth pencil (304a) is arranged along the radial direction of the second cloth cyclome (304), and opposite two described second
The length of cloth pencil (304a) is identical.
6. system according to claim 1, which is characterized in that the system also includes：It is sequentially arranged along water (flow) direction
Butterfly valve (8) on the main pipeline (2) and non-return valve (9).
7. a kind of method for preventing drip emitter from blocking, which is characterized in that the method includes：
Using the first metering pump (6), the acid solution in acid storage tank (4) is injected into the first of mixer (3) with the first preset flow
In mixing tube (301), meanwhile, using the second metering pump (7), the chlorine liquid stored up in chlorine tank (5) is injected into the second preset flow
In the second mixing tube (302) of the mixer (3)；
The acid solution, the chlorine liquid are mixed with the irrigation water in main pipeline (2), to inhibit tamper in drip emitter
Growth；
Wherein, first mixing tube (301), circular cone converging transition of second mixing tube (302) by being sequentially connected to
(3a), isometrical section (3b), circular cone divergent segment (3c) are used to mix the chlorine liquid, the acid solution and the irrigation water.
8. the method according to the description of claim 7 is characterized in that the acid solution is sulfuric acid solution, the chlorine liquid is hypochlorous acid
Sodium solution.
9. according to the method described in claim 8, it is characterized in that, first preset flow is calculated by following calculation formula
It obtains：
QStorage acid=QMain pipeline×Cd/CStorage acid×1000
In formula：
QStorage acidFirst preset flow, L/h；
QMain pipelineFlow of the irrigation water in the main pipeline (2), m3/h；
CStorage acidSulfuric acid concentration in the acid storage tank (4), %；
CdThe irrigation water pH is adjusted to sulfuric acid concentration when 6.3~6.7, %.
10. according to the method described in claim 8, it is characterized in that, second preset flow passes through following calculation formula meter
It obtains：
QStore up chlorine=QMain pipeline×1000×(Cr+Cs)/CStore up chlorine
In formula：
QStore up chlorineSecond preset flow, L/h；
CrThe terminal residual chlorine concentration of the irrigation water, takes 1.5~2.5mg/L；
CsThe irrigation water itself expends residual chlorine concentration, mg/L；
CStore up chlorineEffective chlorine density in the storage chlorine tank (5), mg/L.
11. according to the method described in claim 10, it is characterized in that, the residual chlorine concentration that itself expends obtains by the following method
It takes：
Injected into container the irrigation water, available chlorine content be 0.2% liquor natrii hypochloritis, and the irrigation water with it is described
The addition total volume of liquor natrii hypochloritis is 1L；
The container is rocked, and the residual chlorine concentration in the container is measured using chlorine residue meter, if the residual chlorine concentration in the container
More than or less than the terminal residual chlorine concentration, the addition of liquor natrii hypochloritis described in the container is decreased or increased, until
Residual chlorine concentration in the container is equal to the terminal residual chlorine concentration；
Itself consuming residual chlorine concentration is calculated using following calculation formula：
Cs=V × 2-Cr
In formula：
The addition of liquor natrii hypochloritis described in V-, ml.
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| CN201810206381.7A CN108617467B (en) | 2018-03-13 | 2018-03-13 | System and method for preventing clogging of drip irrigation emitters |
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|---|---|---|---|
| CN201810206381.7A CN108617467B (en) | 2018-03-13 | 2018-03-13 | System and method for preventing clogging of drip irrigation emitters |
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| CN109740926A (en) * | 2018-12-29 | 2019-05-10 | 中国水利水电科学研究院 | Drip irrigation system method of evaluating performance and device |
| CN111742826A (en) * | 2020-06-28 | 2020-10-09 | 北京市水科学技术研究院 | Residual chlorine concentration control method and device and irrigation equipment |
| CN114651559A (en) * | 2022-04-06 | 2022-06-24 | 中国农业科学院农业环境与可持续发展研究所 | Anti-blocking technology of biogas slurry drip irrigation system and application thereof |
| CN117397537A (en) * | 2023-12-04 | 2024-01-16 | 东北农业大学 | Yield-increasing and quality-improving method for tomatoes in greenhouse |
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| CN111742826A (en) * | 2020-06-28 | 2020-10-09 | 北京市水科学技术研究院 | Residual chlorine concentration control method and device and irrigation equipment |
| CN114651559A (en) * | 2022-04-06 | 2022-06-24 | 中国农业科学院农业环境与可持续发展研究所 | Anti-blocking technology of biogas slurry drip irrigation system and application thereof |
| CN117397537A (en) * | 2023-12-04 | 2024-01-16 | 东北农业大学 | Yield-increasing and quality-improving method for tomatoes in greenhouse |
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