CN106082469B - A kind of silt of drip irrigation system regulates and controls method step by step - Google Patents
A kind of silt of drip irrigation system regulates and controls method step by step Download PDFInfo
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- CN106082469B CN106082469B CN201610421104.9A CN201610421104A CN106082469B CN 106082469 B CN106082469 B CN 106082469B CN 201610421104 A CN201610421104 A CN 201610421104A CN 106082469 B CN106082469 B CN 106082469B
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- 230000002262 irrigation Effects 0.000 title claims abstract description 69
- 238000003973 irrigation Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000013049 sediment Substances 0.000 claims abstract description 85
- 229940059082 douche Drugs 0.000 claims abstract description 61
- 239000003621 irrigation water Substances 0.000 claims abstract description 31
- 239000004576 sand Substances 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- 238000001914 filtration Methods 0.000 claims description 39
- 238000009826 distribution Methods 0.000 claims description 16
- 238000011001 backwashing Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 241001466460 Alveolata Species 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000003359 percent control normalization Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 241000208818 Helianthus Species 0.000 description 7
- 235000003222 Helianthus annuus Nutrition 0.000 description 7
- 241000219793 Trifolium Species 0.000 description 7
- 238000004062 sedimentation Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000004658 Medicago sativa Species 0.000 description 1
- 235000010624 Medicago sativa Nutrition 0.000 description 1
- 241000321422 Mycteroperca jordani Species 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 150000003839 salts Chemical class 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/24—Separation of coarse particles, e.g. by using sieves or screens
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental Sciences (AREA)
- Filtration Of Liquid (AREA)
Abstract
The silt of drip irrigation system of the present invention regulates and controls method step by step, and this method includes settling pit desilting, filter sediment trapping, hollow billet sand surfing and 4 grades of douche sand discharge, is effectively connected between regulations at different levels, solves the problems, such as efficiently and at low cost trickle irrigation high sediment concentration；It is final control standard that this method, which is 75% with drip irrigation system uniformity of irrigation water appilcation, the control threshold range of different growth years crop regulated and controled between method and regulation at different levels step by step is proposed, and has obtained the setting of the type selecting, structure of regulation key equipments at different levels and the selection of operating parameter on this basis.
Description
Technical field
The present invention relates to a kind of silts of drip irrigation system to regulate and control method step by step, belongs to agricultural high-effiency water-saving irrigation technique neck
Domain.
Background technique
China's water resource and cultivated land resource distributed pole are unbalanced at present, and water scarcity is got worse, and are contained using earth's surface height
Husky water source, which irrigate, to be become using hot spot.Trickle irrigation is presently the most a kind of water-saving precision irrigation technology, in water scarcity
Irrigated area develops trickle irrigation and is expected to become the effective way for alleviating water scarcity problem.Douche (refers mainly to water dropper, drip irrigation pipe and drop
Fill band) be drip irrigation system most critical component, but douche runner is narrow, particulate matter, dissolving salt, chemical precipitation in water, molten
Solution property organic matter (DOM) and the impurity such as microorganism all easily cause the blocking of douche, this have become restrict drip irrigation technique application,
One of major obstacle of popularization, it solves to obtain the fine or not service life that directly decide drip irrigation project and application benefit.
Most importantly, earth's surface high sand-carrying water silt content is higher, will necessarily be a large amount of while quoting its progress trickle irrigation
Silt brings irrigated area irrigation and drainage system with functions into, brings great risk to the normal operation of drip irrigation system.It is directed to high sand-carrying water source at present
The construction of drip irrigation project mainly handles Sedimentation Problems by huge sedimentation basin and huge, complicated multistage filtering facility, can
Sediment concentration is greatly reduced, but but also the investment of entire drip irrigation system sharply increases.It is how scientific and reasonable, efficiently control
Silt guarantees the normal operation of drip irrigation system, it has also become develops high sand-carrying water source trickle irrigation matter of utmost importance urgently to be solved.
Aiming at the problem that high sediment concentration of high sand-carrying water source trickle irrigation, only part experts and scholars are directed to drip irrigation system at present
One key components (settling pit, filter, hollow billet and douche etc.) propose the method for silt control.Such as Xi'an division of construction
Skill university Lu Jin lock etc. proposes a kind of eddy flow silt separation apparatus, can realize the removal of little particle silt, effectively to contain height
Sha Shui provides possibility as trickle irrigation water source.China Agricultural University Li Yun, which is opened etc., proposes a kind of arsenicbearing gold ores source trickle irrigation settling pit
And its optimization method, the settling pit improve mud by adding scroll on the basis of bar shaped settling pit, adjusting the auxiliary equipment such as stream tooth
Husky sedimentation rate, and being capable of timely sand discharge.The studies above is all made of level-one facility and handles silt, though expend largely at
This and energy improve sediment settlement efficiency of facility etc., can not fundamentally solve high sand-carrying water source silt height and contain
The problem of amount, high concentration, more cannot be achieved and promote and apply on a large scale.Most importantly, it is whole to yet there are no one for existing research
Set low cost and efficient high sand-carrying water source silt regulator control system, regulation standard and threshold value are even more to have no.
Based on this, the invention proposes a kind of silts of drip irrigation system to regulate and control method step by step, and this method is each with drip irrigation system
Component part be an organic whole, from settling pit desilting, filter sediment trapping, hollow billet sand surfing and douche sand discharge step by step to silt into
Row regulation, plays the silt sedimentation ability of every level-one, and propose the silt control threshold between at different levels to greatest extent, realizes
Effective linking between step by step, is not only realized with lower cost and highest efficiency to high sand-carrying water source trickle irrigation silt
Processing is provided possibility for the promotion and application of high sand-carrying water source trickle irrigation, and when being irrigated using earth's surface high sand-carrying water, contained
Sand amount is greater than 2kg/m3When, the silt that drip irrigation system provided by the invention can be used regulates and controls method step by step.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of silts of drip irrigation system to adjust step by step
Prosecutor method, this method include settling pit desilting, filter sediment trapping, hollow billet sand surfing and 4 grades of douche sand discharge regulation, regulations at different levels
Between be effectively connected, efficiently and solve the problems, such as trickle irrigation high sediment concentration at low cost.This method is with drip irrigation system uniformity of irrigation water appilcation
It is final control standard for 75%, proposes the control of different growth years crop regulated and controled between method and regulation at different levels step by step
Threshold range, and the setting of the type selecting, structure of regulation key equipments at different levels and the selection of operating parameter have been obtained on this basis.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of silt of drip irrigation system regulates and controls method step by step, includes the following steps:
(1) settling pit desilting
Irrigation water enters settling pit and carries out desilting, using gravity type desilting filtering composite system as prototype, lays inclined tube and sieve
Net, to improve sediment settlement efficiency to greatest extent, wherein the mesh number cloth of sieve is set as 150 mesh；Then by different
Water distribution area height condition below inclined tube form, different inclined tube length, different inclined tube water (flow) direction angles and different inclined tubes
Under sediment settlement rate compare, show that the applicable optimal settling pit inclined tube of the crop of different growth years lays mode and heavy
Sand basin goes out to flow sediment grain size control threshold；
On the basis of above scheme, the optimal settling pit inclined tube that the crop of growth in 1 year is applicable lays mode are as follows: honeycomb
Inclined tube, optimum length are 85-115cm, are 60 ° with water (flow) direction angle, and lower section water distribution area suitable height is 60cm-80cm,
The stream sediment grain size control threshold that goes out of settling pit is D50=23.31 μm.
On the basis of above scheme, the applicable optimal settling pit inclined tube of the long crop of triennial lays mode are as follows: honeycomb
Inclined tube, optimum length are 95-125cm, are 60 ° with water (flow) direction angle, and lower section water distribution area suitable height is 60cm-80cm,
The stream sediment grain size control threshold that goes out of settling pit is D50=22.21 μm.
On the basis of above scheme, the optimal settling pit inclined tube that the crop of growth in 5 years is applicable lays mode are as follows: honeycomb
Inclined tube, optimum length are 105-135cm, are 60 ° with water (flow) direction angle, and lower section water distribution area suitable height is 60cm-80cm,
The stream sediment grain size control threshold that goes out of settling pit is D50=21.37 μm.
(2) filter sediment trapping
Irrigation water after settling pit desilting enters filter and carries out double-filtration, and by-pass filtration is filtered by sandstone
Device filtering damages the head of sandrock filter under the different particle diameter of filter medium of sandrock filter, filtering and backwash flow conditions
Mistake is analyzed with silt removal efficiency, obtains optimal sandrock filter operational mode；Secondary filtration passes through laminated filter
Filtering, the mesh number of laminated filter are 150 mesh, show that different growth years crop goes out stream sediment grain size control by double-filtration
Threshold value processed；
On the basis of above scheme, optimal sandrock filter operational mode are as follows: homogeneous filtering material average grain diameter is 0.9-
1.3mm, filtration flow-rate 0.017m/s, backwash flow velocity are 0.018m/s, and it is pressure difference before and after filter that backwash, which starts index,
For 50kPa, backwashing ending standard is that filter front and back pressure difference restores to 20-40kPa.
On the basis of above scheme, the crop of growth in 1 year: the stream sediment grain size control threshold that goes out of filter is D50=
22.14μm；The long crop of triennial: the stream sediment grain size control threshold that goes out of filter is D50=21.56 μm；The work of growth in 5 years
Object: the stream sediment grain size control threshold that goes out of filter is D50=20.65 μm.
(3) hollow billet sand surfing
Irrigation water after filter sediment trapping enters in hollow billet, to reduce the tamper for entering douche to greatest extent
Matter, by it is different flushing frequencies and irrigation flow rate under the opposite average flow rates of douche, the uniformity of irrigation water appilcation of douche and
Blocking substance dry weight compares and analyzes, and determines the optimal backwashing manner of hollow billet, and obtain the hollow billet of different growth years crop
Go out stream sediment grain size control threshold；
On the basis of above scheme, the optimal backwashing manner of hollow billet are as follows: the every operation 64h of system is with the rinse flow of 0.4m/s
Speed rinses 6min.
On the basis of above scheme, the crop of growth in 1 year: the stream sediment grain size control threshold that goes out of hollow billet is D50=
21.03μm；The long crop of triennial: the stream sediment grain size control threshold that goes out of hollow billet is D50=20.66 μm；The crop of growth in 5 years:
The stream sediment grain size control threshold that goes out of hollow billet is D50=19.98 μm.
(4) douche sand discharge
Irrigation water after hollow billet sand surfing enters douche, analyzes inhomogeneity respectively for the crop of different growth years
Influence (being characterized with carbon footprint) in the uniformity of irrigation water appilcation of type douche, production cost and its production to environment, and utilize SPSS
Principal component analytical method establishes selective goal to these three elements, and then the filling that the crop for filtering out different growth years is suitable for
Hydrophone type, and show that sediment grain size control threshold flows in the going out for douche of different growth years crop, it plays to greatest extent
Douche from capability of sediment outflow, realize that the uniformity of irrigation water appilcation of drip irrigation system is 75% control standard.
On the basis of above scheme, the applicable douche type of the crop of growth in 1 year is single-blade labyrinth type, douche
Stream sediment grain size control threshold is D out50=20.95 μm.
On the basis of above scheme, the applicable douche type of the long crop of triennial is interior edge patch type, douche
Stream sediment grain size control threshold is D out50=20.04 μm.
On the basis of above scheme, the applicable douche type of the crop of growth in 5 years is interior edge column type, douche
Stream sediment grain size control threshold is D out50=19.63 μm.
Detailed description of the invention
The present invention has following attached drawing:
The silt of Fig. 1 drip irrigation system regulates and controls flow chart step by step；
Fig. 2 crow is examined the cadres' personal histories canal Huanghe water size grading.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
A kind of silt of drip irrigation system regulates and controls method step by step, includes the following steps:
(1) settling pit desilting
Irrigation water enters settling pit and carries out desilting, using gravity type desilting filtering composite system as prototype, lays inclined tube and sieve
Net, to improve sediment settlement efficiency to greatest extent, wherein the mesh number cloth of sieve is set as 150 mesh；Then by different
Water distribution area height condition below inclined tube form, different inclined tube length, different inclined tube water (flow) direction angles and different inclined tubes
Under sediment settlement rate compare, show that the applicable optimal settling pit inclined tube of the crop of different growth years lays mode and heavy
Sand basin goes out to flow sediment grain size control threshold；
On the basis of above scheme, the optimal settling pit inclined tube that the crop of growth in 1 year is applicable lays mode are as follows: honeycomb
Inclined tube, optimum length are 85-115cm, are 60 ° with water (flow) direction angle, and lower section water distribution area suitable height is 60cm-80cm,
The stream sediment grain size control threshold that goes out of settling pit is D50=23.31 μm.
On the basis of above scheme, the applicable optimal settling pit inclined tube of the long crop of triennial lays mode are as follows: honeycomb
Inclined tube, optimum length are 95-125cm, are 60 ° with water (flow) direction angle, and lower section water distribution area suitable height is 60cm-80cm,
The stream sediment grain size control threshold that goes out of settling pit is D50=22.21 μm.
On the basis of above scheme, the optimal settling pit inclined tube that the crop of growth in 5 years is applicable lays mode are as follows: honeycomb
Inclined tube, optimum length are 105-135cm, are 60 ° with water (flow) direction angle, and lower section water distribution area suitable height is 60cm-80cm,
The stream sediment grain size control threshold that goes out of settling pit is D50=21.37 μm.
(2) filter sediment trapping
Irrigation water after settling pit desilting enters filter and carries out double-filtration, and by-pass filtration is filtered by sandstone
Device filtering damages the head of sandrock filter under the different particle diameter of filter medium of sandrock filter, filtering and backwash flow conditions
Mistake is analyzed with silt removal efficiency, obtains optimal sandrock filter operational mode；Secondary filtration passes through laminated filter
Filtering, the mesh number of laminated filter are 150 mesh, show that different growth years crop goes out stream sediment grain size control by double-filtration
Threshold value processed；
On the basis of above scheme, optimal sandrock filter operational mode are as follows: homogeneous filtering material average grain diameter is 0.9-
1.3mm, filtration flow-rate 0.017m/s, backwash flow velocity are 0.018m/s, and it is pressure difference before and after filter that backwash, which starts index,
For 50kPa, backwashing ending standard is that filter front and back pressure difference restores to 20-40kPa.
On the basis of above scheme, the crop of growth in 1 year: the stream sediment grain size control threshold that goes out of filter is D50=
22.14μm；The long crop of triennial: the stream sediment grain size control threshold that goes out of filter is D50=21.56 μm；The work of growth in 5 years
Object: the stream sediment grain size control threshold that goes out of filter is D50=20.65 μm.
(3) hollow billet sand surfing
Irrigation water after filter sediment trapping enters in hollow billet, to reduce the tamper for entering douche to greatest extent
Matter, by it is different flushing frequencies and irrigation flow rate under the opposite average flow rates of douche, the uniformity of irrigation water appilcation of douche and
Blocking substance dry weight compares and analyzes, and determines the optimal backwashing manner of hollow billet, and obtain the hollow billet of different growth years crop
Go out stream sediment grain size control threshold；
On the basis of above scheme, the optimal backwashing manner of hollow billet are as follows: the every operation 64h of system is with the rinse flow of 0.4m/s
Speed rinses 6min.
On the basis of above scheme, the crop of growth in 1 year: the stream sediment grain size control threshold that goes out of hollow billet is D50=
21.03μm；The long crop of triennial: the stream sediment grain size control threshold that goes out of hollow billet is D50=20.66 μm；The crop of growth in 5 years:
The stream sediment grain size control threshold that goes out of hollow billet is D50=19.98 μm.
(4) douche sand discharge
Irrigation water after hollow billet sand surfing enters douche, analyzes inhomogeneity respectively for the crop of different growth years
Influence (being characterized with carbon footprint) in the uniformity of irrigation water appilcation of type douche, production cost and its production to environment, and utilize SPSS
Principal component analytical method establishes selective goal to these three elements, and then the filling that the crop for filtering out different growth years is suitable for
Hydrophone type, and show that sediment grain size control threshold flows in the going out for douche of different growth years crop, it plays to greatest extent
Douche from capability of sediment outflow, realize that the uniformity of irrigation water appilcation of drip irrigation system is 75% control standard.
On the basis of above scheme, the applicable douche type of the crop of growth in 1 year is single-blade labyrinth type, douche
Stream sediment grain size control threshold is D out50=20.95 μm.
On the basis of above scheme, the applicable douche type of the long crop of triennial is interior edge patch type, douche
Stream sediment grain size control threshold is D out50=20.04 μm.
On the basis of above scheme, the applicable douche type of the crop of growth in 5 years is interior edge column type, douche
Stream sediment grain size control threshold is D out50=19.63 μm.
Embodiment: the water source crow domestic from Baya ur, NeiMengGu city Dengkou County is examined the cadres' personal histories canal, and annual silt content is
2.6kg/m3, size grading is as shown in Figure 2.The ecological region planting crop be mainly implantation time be respectively 1 year sunflower, 3 years
Fructus lycii and 5 years clovers.
The silt of the drip irrigation system proposed according to the present invention regulates and controls method step by step, and specific implementation process is as follows:
(1) settling pit desilting
Irrigation water enters settling pit and carries out desilting, using gravity type desilting filtering composite system as prototype, lays inclined tube and sieve
Net improves sediment settlement efficiency to realize to greatest extent.Wherein the laying number of sieve be 150 mesh, by diamond shape, just
Rectangular, alveolate leaning pipe, length are respectively 80cm, 100cm, 120cm, inclined tube and 50 ° of water (flow) direction angle, 60 °, 70 °, inclined tube
Sediment settlement rate under the conditions of lower section water distribution area height 40-60cm, 60-80cm, 80-100cm compares, and show that sunflower is suitable
Optimal settling pit inclined tube lays mode are as follows: alveolate leaning pipe, optimum length are 85-115cm, are with water (flow) direction angle
60 °, lower section water distribution area suitable height is 60cm-80cm, when sunflower uses trickle irrigation, goes out stream sediment grain size after settling pit sedimentation
Control threshold is D50=23.31 μm；The applicable optimal settling pit inclined tube of fructus lycii lays mode are as follows: alveolate leaning pipe, optimum are long
Degree is 95-125cm, is 60 ° with water (flow) direction angle, and lower section water distribution area suitable height is 60cm-80cm, and fructus lycii uses trickle irrigation
When, the stream sediment grain size control threshold that goes out after settling pit settles is D50=22.21 μm；The applicable optimal settling pit inclined tube of clover
Laying mode are as follows: alveolate leaning pipe, optimum length are 105-135cm, are 60 ° with water (flow) direction angle, and lower section water distribution area is suitable
Preferably height is 60cm-80cm, and when clover uses trickle irrigation, the stream sediment grain size control threshold that goes out after settling pit settles is D50=
21.37μm。
(2) filter sediment trapping
Irrigation water after settling pit desilting enters filter and carries out double-filtration, and grade one filter passes through sandstone mistake
Filter filtering is 0.5-0.9mm, 0.9-1.3mm, 1.3-1.8mm in sandrock filter particle diameter of filter medium, and filtering velocity is respectively
0.008m/s, 0.010m/s, 0.012m/s, 0.014m/s, 0.016m/s, backwash flow velocity be 0.010m/s, 0.012m/s,
Under the conditions of 0.014m/s, 0.016m/s, 0.018m/s, the head loss and silt removal efficiency of sandrock filter are divided
Analysis, it is 0.9-1.3mm that obtain optimal sandrock filter operational mode, which be homogeneous filtering material average grain diameter, and filtration flow-rate is
0.017m/s, backwash flow velocity are 0.018m/s, and backwash beginning index is that filter front and back pressure difference is 50kPa, backwash knot
Beam standard is that filter front and back pressure difference restores to 20-40kPa.On this basis, analysis laminated filter and granular membrane mesh
Number is respectively the head loss and silt removal efficiency under the conditions of 80 mesh, 120 mesh, 150 mesh, 200 mesh, finally obtains secondary filtration
Optimal device is laminated filter, and mesh number is 150 mesh.When sunflower uses trickle irrigation, filter is filtered to be gone out to flow sediment grain size control
Threshold value processed is D50=22.14 μm；When fructus lycii uses trickle irrigation, filter is filtered to be gone out to flow sediment grain size control threshold for D50=
21.56μm；When clover uses trickle irrigation, filter is filtered to be gone out to flow sediment grain size control threshold for D50=20.65 μm.
(3) hollow billet sand surfing
Irrigation water after filter sediment trapping enters in hollow billet, to reduce the tamper for entering douche to greatest extent
Matter, by rinse frequency be respectively 1 time/32h, 1 time/64h, 1 time/96h, 1 time/128h and irrigation flow rate be respectively 0.2m/
S, the opposite average flow rate of the douche under 0.4m/s, 0.6m/s, the uniformity of irrigation water appilcation of douche and blocking substance dry weight carry out
Comparative analysis determines the optimal backwashing manner of hollow billet are as follows: the every operation 64h of system rinses 6min with the irrigation flow rate of 0.4m/s.To
When day certain herbaceous plants with big flowers uses trickle irrigation, the stream sediment grain size control threshold that goes out after hollow billet sand surfing is D50=21.03 μm；Fructus lycii uses trickle irrigation
When, the stream sediment grain size control threshold that goes out after hollow billet sand surfing is D50=20.66 μm；When clover uses trickle irrigation, through hollow billet sand surfing
The stream sediment grain size control threshold that goes out afterwards is D50=19.98 μm.
(4) douche sand discharge
Irrigation water after hollow billet sand surfing enters douche, analyzes inhomogeneity respectively for sunflower, fructus lycii and clover
Influence (being characterized with carbon footprint) in the uniformity of irrigation water appilcation of type douche, production cost and its production to environment, and utilize SPSS
Principal component analytical method establishes selective goal to these three elements, and then the filling that the crop for filtering out different growth years is suitable for
The douche of hydrophone type and different growth years crop goes out stream sediment grain size control threshold.What wherein sunflower was applicable in pours water
Device is single-blade labyrinth type douche, and when sunflower uses trickle irrigation, single-blade labyrinth type douche goes out stream sediment grain size control threshold
For D50=20.95 μm；The applicable douche of fructus lycii is interior edge patch type douche, and when fructus lycii uses trickle irrigation, interior edge patch type is filled
The stream sediment grain size control threshold that goes out of hydrophone is D50=20.04 μm；The applicable douche of clover is interior edge column type douche, lucerne
When Mu uses trickle irrigation, the stream sediment grain size control threshold that goes out of interior edge column type douche is D50=19.63 μm, realize drip irrigation system
Uniformity of irrigation water appilcation be 75% final control standard.
The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (11)
1. a kind of silt of drip irrigation system regulates and controls method step by step, which comprises the steps of:
(1) settling pit desilting
Irrigation water enters settling pit and carries out desilting, using gravity type desilting filtering composite system as prototype, lays inclined tube and sieve,
The mesh number cloth of middle sieve is set as 150 mesh；Then by different inclined tube forms, different inclined tube length, different inclined tube water
Sediment settlement rate below stream angular separation and different inclined tubes under the conditions of water distribution area height compares, and obtains different growth years
The applicable optimal settling pit inclined tube of the crop of limit lays mode and settling pit goes out to flow sediment grain size control threshold；
(2) filter sediment trapping
Irrigation water after settling pit desilting enters filter and carries out double-filtration, and by-pass filtration passes through sandrock filter mistake
Filter, under the different particle diameter of filter medium of sandrock filter, filtering and backwash flow conditions, to the head loss of sandrock filter with
Silt removal efficiency is analyzed, and optimal sandrock filter operational mode is obtained；Secondary filtration is filtered by laminated filter,
The mesh number of laminated filter is 150 mesh, show that different growth years crop goes out stream sediment grain size control threshold by double-filtration
Value；
(3) hollow billet sand surfing
Irrigation water after filter sediment trapping enters in hollow billet, by the douche under different flushing frequencies and irrigation flow rate
Opposite average flow rate, douche uniformity of irrigation water appilcation and blocking substance dry weight compare and analyze, determine the optimal punching of hollow billet
Mode is washed, and obtains the stream sediment grain size control threshold out of the hollow billet of different growth years crop；
(4) douche sand discharge
Irrigation water after hollow billet sand surfing enters douche, analyzes different type filling respectively for the crop of different growth years
Influence in the uniformity of irrigation water appilcation of hydrophone, production cost and its production to environment, and using SPSS principal component analytical method to this
The douche type that the crop that three elements establish selective goal, and then filter out different growth years is suitable for, and obtain not
With the stream sediment grain size control threshold out of the douche of growth year crop, realize that the uniformity of irrigation water appilcation of drip irrigation system is 75%
Control standard.
2. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (1), life in 1 year
The applicable optimal settling pit inclined tube of long crop lays mode are as follows: alveolate leaning pipe, optimum length is 85-115cm, with water flow
Angular separation is 60 °, and lower section water distribution area suitable height is 60cm-80cm, and the stream sediment grain size control threshold that goes out of settling pit is D50
=23.31 μm.
3. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (1), triennial
The applicable optimal settling pit inclined tube of long crop lays mode are as follows: alveolate leaning pipe, optimum length is 95-125cm, with water flow
Angular separation is 60 °, and lower section water distribution area suitable height is 60cm-80cm, and the stream sediment grain size control threshold that goes out of settling pit is D50
=22.21 μm.
4. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (1), life in 5 years
The applicable optimal settling pit inclined tube of long crop lays mode are as follows: alveolate leaning pipe, optimum length is 105-135cm, with water
Flowing angular separation is 60 °, and lower section water distribution area suitable height is 60cm-80cm, and the stream sediment grain size control threshold that goes out of settling pit is
D50=21.37 μm.
5. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that optimal in step (2)
Sandrock filter operational mode are as follows: homogeneous filtering material average grain diameter is 0.9-1.3mm, filtration flow-rate 0.017m/s, backwash stream
Speed is 0.018m/s, and backwash beginning index is that filter front and back pressure difference is 50kPa, and backwash ending standard is before and after filter
Pressure difference restores to 20-40kPa.
6. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (2), life in 1 year
Long crop: the stream sediment grain size control threshold that goes out of filter is D50=22.14 μm；The long crop of triennial: filter goes out to flow
Sediment grain size control threshold is D50=21.56 μm；The crop of growth in 5 years: the stream sediment grain size control threshold that goes out of filter is D50
=20.65 μm.
7. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (3), hollow billet
Optimal backwashing manner are as follows: the every operation 64h of system rinses 6min with the irrigation flow rate of 0.4m/s.
8. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (3), life in 1 year
Long crop: the stream sediment grain size control threshold that goes out of hollow billet is D50=21.03 μm；The long crop of triennial: hollow billet goes out stream silt
Size controlling threshold value is D50=20.66 μm；The crop of growth in 5 years: the stream sediment grain size control threshold that goes out of hollow billet is D50=
19.98μm。
9. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (4), life in 1 year
The applicable douche type of long crop is single-blade labyrinth type, and the stream sediment grain size control threshold that goes out of douche is D50=20.95 μ
m。
10. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (4), triennial
The applicable douche type of long crop is interior edge patch type, and the stream sediment grain size control threshold that goes out of douche is D50=20.04 μ
m。
11. the silt of drip irrigation system as described in claim 1 regulates and controls method step by step, which is characterized in that in step (4), life in 5 years
The applicable douche type of long crop is interior edge column type, and the stream sediment grain size control threshold that goes out of douche is D50=19.63 μ
m。
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| CN106874539B (en) * | 2016-12-31 | 2020-06-19 | 中国农业大学 | Method and device for designing filter sheet flow passage structure of laminated filter |
| CN108029517B (en) * | 2017-12-13 | 2020-05-19 | 中国农业大学 | Direct-drainage drip irrigation system for channel of yellow-drainage irrigation area and operation method |
| CN108751519B (en) * | 2018-08-01 | 2024-03-05 | 北京东方园林环境股份有限公司 | Anti-blocking system for landscape irrigation by using high sediment water source and construction method thereof |
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