CN108751519B - Anti-blocking system for landscape irrigation by using high sediment water source and construction method thereof - Google Patents
Anti-blocking system for landscape irrigation by using high sediment water source and construction method thereof Download PDFInfo
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- CN108751519B CN108751519B CN201810866011.6A CN201810866011A CN108751519B CN 108751519 B CN108751519 B CN 108751519B CN 201810866011 A CN201810866011 A CN 201810866011A CN 108751519 B CN108751519 B CN 108751519B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 185
- 230000002262 irrigation Effects 0.000 title claims abstract description 73
- 238000003973 irrigation Methods 0.000 title claims abstract description 73
- 239000013049 sediment Substances 0.000 title abstract description 50
- 238000010276 construction Methods 0.000 title abstract description 10
- 238000004062 sedimentation Methods 0.000 claims abstract description 100
- 238000005189 flocculation Methods 0.000 claims abstract description 57
- 238000000926 separation method Methods 0.000 claims abstract description 56
- 230000016615 flocculation Effects 0.000 claims abstract description 55
- 230000000903 blocking effect Effects 0.000 claims abstract description 34
- 239000004576 sand Substances 0.000 claims abstract description 34
- 239000002245 particle Substances 0.000 claims abstract description 25
- 239000008394 flocculating agent Substances 0.000 claims abstract description 9
- 239000003621 irrigation water Substances 0.000 claims description 28
- 238000001914 filtration Methods 0.000 claims description 23
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 12
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 5
- 210000005056 cell body Anatomy 0.000 claims 2
- 239000007921 spray Substances 0.000 abstract description 10
- 239000012535 impurity Substances 0.000 description 16
- 239000010802 sludge Substances 0.000 description 12
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 8
- 239000002689 soil Substances 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
-
- 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
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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention relates to an anti-blocking system for landscape irrigation by utilizing a high sediment water source and a construction method thereof, wherein the anti-blocking system comprises a primary sedimentation reservoir, a flocculation separation tank, a tube sedimentation tank and a distribution tank which are sequentially communicated in the water flow direction, and further comprises a sand blocking chamber which is arranged at a branch pipe of an irrigation main pipe, a feeding port for feeding a flocculating agent is arranged between the primary sedimentation reservoir and the flocculation separation tank, the flocculation separation tank is integrally in a gyro shape, the tube sedimentation tank is an upward flow tube sedimentation tank, and water flow enters the distribution tank after passing through the tube sedimentation tank and is conveyed to the irrigation main pipe by a water lifting pump. According to the invention, various garbage and sediment with different particle diameters in a river water source are intercepted in a grading manner through the water-sediment separation system before the water source enters the irrigation pipeline and the sediment blocking chamber in the irrigation pipeline; the sediment content entering the branch pipe and the spray head of the irrigation pipeline is greatly reduced.
Description
Technical Field
The invention relates to the technical field of landscape maintenance, in particular to an anti-blocking system for landscape irrigation by using a high sediment water source and a construction method thereof, which are particularly suitable for construction of an anti-blocking micro-spray irrigation water supply system by using the high sediment water as an irrigation water source.
Background
Along with the updating of urban construction concepts, improving ecology and improving environmental quality have become important concerns for urban construction. The maintenance of landscape plants is not only an important sign of the urban greening development level and a precondition for improving the richness of green land landscapes, but also a basis for the ecological functions of urban green land systems and a good guarantee of urban ecological environment.
At present, the irrigation of gardens in areas with less precipitation in the north is mostly carried out by adopting groundwater or river diversion irrigation, and the river diversion usually contains a large amount of sediment, garbage and the like. Impurities with larger hardness such as silt contained in irrigation water can cause continuous damage to the pipeline on one hand, and influence the service life of the pipeline; on the other hand, high silt water is retained in the pipeline for a long time, so that facilities such as the pipeline is easy to block, a spray head is easy to damage, and the application of novel garden irrigation technologies such as spray irrigation and micro spray irrigation is limited. Because the water pipeline in the landscaping irrigation is buried underground, the cleaning and the replacement are not in aspects, and a great deal of fund loss can be caused.
Disclosure of Invention
The invention aims to solve the problems of blockage, damage and the like of irrigation facilities caused by overhigh sediment content of water bodies in the existing surface water body such as river water and the like in the garden irrigation process, and provides an anti-blocking system for landscape irrigation by utilizing a high sediment water source and a construction method thereof, wherein the anti-blocking system can effectively reduce sediment content in an irrigation system.
The invention provides a water anti-blocking system for landscape irrigation by utilizing a high sediment water source, which comprises a primary sedimentation reservoir, a flocculation separation tank, a tube sedimentation tank and a water distribution tank which are sequentially communicated in the water flow direction, and further comprises a sand blocking chamber arranged at a branch pipe of an irrigation main pipe, wherein the primary sedimentation reservoir comprises a water inlet and a water outlet which are respectively arranged at the upper parts of two opposite surfaces of a tank body, a water pump arranged at the water outlet and a gabion filtering wall which is arranged in the tank body in a separated manner, a feeding port for feeding a flocculating agent is arranged between the primary sedimentation reservoir and the flocculation separation tank, the flocculation separation tank is integrally in a gyro shape, the flocculation separation tank comprises a cylindrical structure with a first overflow pipe at the upper end and a conical structure with a first mud discharging pipe at the lower end, the first overflow pipe is communicated with the tube sedimentation tank, the tube sedimentation main pipe is an upward flow tube sedimentation tank, and water flows into the water distribution tank after passing through the tube sedimentation tank and is conveyed to the irrigation main pipe by a water pump.
Preferably, the primary sedimentation reservoir is a cuboid reservoir, the depth is 0.8-1.2 m, and the width is 1.5-3 m; at least three rows of gabion filtering walls are arranged at intervals of 1m from a long-side water inlet of the primary sedimentation reservoir, the thickness of each gabion filtering wall is 20-40 cm, the height of each gabion filtering wall is higher than Chi Shen, gravels are filled in gabions of each gabion filtering wall, and the particle size of each gravel is gradually reduced from front to back along the water inlet direction.
Preferably, the feeding port is used for feeding the polyaluminum ferric chloride flocculant solution with the mass concentration of 2% -5%, and the feeding speed of the polyaluminum ferric chloride flocculant solution is determined according to the flow rate/flow velocity of incoming water.
Preferably, three rows of gabion filtering walls are arranged at intervals of 1m from the long edge water inlet of the primary sedimentation reservoir, and the particle sizes of broken stones in the three rows of gabion filtering walls are 15-10 cm, 5-10 cm and 3-5 cm respectively along the water inlet direction.
Preferably, the diameter of the flocculation separation tank is 80cm, the height of the cylindrical structure is 80cm, and the included angle between the outer wall of the conical structure and the axis is 20 degrees; the diameter of the first mud discharging pipe is 10cm, the diameter of the first overflow pipe is 20cm, the upper part of the first overflow pipe is 20cm higher than the upper end of the cylindrical structure, and the depth of the first overflow pipe is equal to that of the cylindrical structure.
Preferably, the inclined tube sedimentation tank comprises a zigzag sludge collecting hopper arranged at the bottom of the tank, a second sludge discharge pipe arranged at the bottom of the sludge collecting hopper, an inclined tube arranged in the tank and a water collecting porous pipe arranged at the upper part of the tank, wherein the tail end of the water collecting porous pipe is communicated with the water distribution tank through a second overflow pipe.
Preferably, the primary sedimentation reservoir, the flocculation separation tank, the inclined tube sedimentation tank and the distribution tank are communicated by a water pipe with the pipe diameter of 15-20 cm, the distribution tank is a columnar tank with the depth of 120cm and the diameter of 50cm, a water pump is arranged at the upper part of the distribution tank, and the water pump conveys water in the distribution tank to an irrigation main pipe.
Preferably, two pairs of side surfaces of the sand blocking chamber are respectively provided with a main pipe water inlet and a main pipe water outlet, other side surfaces of the sand blocking chamber are provided with branch pipe water inlets, the branch pipe water inlets are provided with electrostatic composite fiber filter screens, and the top surface of the sand blocking chamber is provided with an observation port.
Preferably, the sand blocking chamber is a box body with the length multiplied by the width multiplied by the height of 50 multiplied by 30 cm; the main pipe water inlet and the main pipe water outlet are arranged at the central positions of the front and rear surfaces of the box body, and the diameter of the main pipe water inlet and the main pipe water outlet is 20cm; the water inlet of the branch pipe is arranged at the center of the bottom of the side face of the box body, and the diameter of the water inlet of the branch pipe is 10cm.
Another object of the present invention is to provide a method of constructing the irrigation water anti-blocking system, comprising the steps of:
A. selecting an area near an irrigation area, planning a primary sedimentation reservoir according to the area of the irrigation area, and sequentially designing a flocculation separation tank, an inclined tube sedimentation tank and a distribution tank at the rear side of the primary sedimentation reservoir;
B. determining the row number of gabion filtering walls according to the irrigation water source characteristics of a greening area, constructing a primary sedimentation reservoir, connecting a water pipe with the diameter of 20cm and a water pump at the water outlet of the primary sedimentation reservoir, and arranging a feeding port at the rear side of the water pump;
C. a flocculation separation tank is arranged at the position 1m behind the primary sedimentation reservoir, the flocculation separation tank is formed by pouring concrete, the inner wall is smooth, the flocculation separation tank is communicated with the inclined tube sedimentation tank through a first overflow pipe, and then the inclined tube sedimentation tank is connected with a distribution tank and irrigation water is conveyed to an irrigation main pipe through a water pump;
D. the branch pipe is divided into a branch pipe by the main irrigation pipe, and the static composite fiber filter screen is arranged at the side surface of the water inlet of the branch pipe and 5cm away from the water inlet of the branch pipe.
Based on the technical scheme, the invention has the advantages that:
according to the anti-blocking system for landscape irrigation by utilizing a high sediment water source and the construction method thereof, various garbage and sediment with different particle diameters in a river water source are intercepted in a grading manner through the water-sediment separation system before the water source enters an irrigation pipeline and the sediment blocking chamber in the irrigation pipeline; the sediment content entering the branch pipe and the spray head of the irrigation pipeline is greatly reduced. After the system is constructed, the following positive effects are achieved:
firstly, through preliminary filtration of a gabion filter wall in a preliminary sedimentation reservoir, large-particle sediment with the particle size of more than 0.1mm, other impurities and the like in incoming water are left in the preliminary sedimentation reservoir, and the sediment in outgoing water of the preliminary sedimentation reservoir is mainly particle suspended sediment with the particle size of less than 0.1mm and various suspended colloids.
Secondly, after river water added with flocculating agent such as polyaluminium ferric chloride enters a flocculation separation tank, sediment and suspended matters with the diameter of 0.1-0.01 mm react with the flocculating agent to form flocculent precipitate. And because of the special shape of the flocculation separation tank, turbulent flow and rotational flow can be generated, which is helpful for improving the speed and efficiency of the flocculation process. At this time, part of the flocculation sediment falls into the bottom of the flocculation separation tank and can be discharged by a sludge discharge pipe; and part of impurities such as sediment which cannot be flocculated fully enter the integrated tube sedimentation tank to be thoroughly removed. After the polymeric ferric aluminum chloride flocculant which is not completely consumed enters the soil along with an irrigation system, the polymeric ferric aluminum chloride flocculant has the effect of adjusting the pH of the soil to a certain extent based on the acid-base binary characteristic of aluminum.
Finally, after a few extremely fine particle impurities with the particle diameter smaller than 10 mu m which can not form flocculation precipitation enter an irrigation pipeline, the extremely fine particle impurities are adsorbed and filtered by an electrostatic composite fiber filter screen in a sand blocking chamber, so that irrigation water entering an irrigation branch pipe contains extremely small impurities, the blockage of the irrigation system is prevented, and the service lives of the branch pipe and a spray head are prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of an irrigation water anti-blocking system;
FIG. 2 is a schematic illustration of a primary sedimentation reservoir;
FIG. 3 is a schematic diagram of a flocculation separation tank;
FIG. 4 is a schematic top view of a sand blocking chamber;
figure 5 is a schematic side view of a sand blocking chamber.
Detailed Description
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
The invention provides an anti-blocking system for landscape irrigation by utilizing a high sediment water source, which is characterized in that a water-sand separation system is arranged before the water source enters an irrigation main pipe to remove impurities with different properties and particle sizes, so that the sediment quantity entering the irrigation main pipe is reduced. Meanwhile, a sand blocking chamber is arranged between the main pipe and the branch pipe to intercept and regularly remove impurities such as sediment accumulated in the pipeline. As shown in fig. 1-5, there is shown a preferred embodiment of the present invention.
Specifically, the anti-blocking system for landscape irrigation by utilizing a high sediment water source comprises a primary sedimentation reservoir 1, a flocculation separation tank 2, a tube sedimentation tank 3 and a distribution tank 4 which are sequentially communicated in the water flow direction, and further comprises a sand blocking chamber 7 arranged at a branch pipe of an irrigation main pipe, wherein the primary sedimentation reservoir 1 comprises a water inlet 11 and a water outlet 12 which are respectively arranged at two opposite surfaces of a tank body, a water pump 13 arranged at the water outlet 12 and a gabion filtering wall 14 arranged in the tank body in a separated manner, a feeding port 5 for feeding a flocculating agent is arranged between the primary sedimentation reservoir 1 and the flocculation separation tank 2, the flocculation separation tank 2 is integrally in a gyro shape, the flocculation separation tank 2 comprises a cylindrical structure 22 with a first overflow pipe 21 at the upper end and a conical structure 23 with a first mud discharging pipe 24 at the lower end, the first overflow pipe 21 is communicated with the tube sedimentation tank 3, the water flow enters the distribution tank 4 after passing through the tube sedimentation tank 3, and is conveyed to the main pipe 8 by a water pump 6.
As shown in fig. 1, the primary sedimentation reservoir 1 is a cuboid reservoir, the depth is 0.8-1.2 m, the width is 1.5-3 m, the length can be determined to be generally more than 4m according to the water demand of garden irrigation, and the specific pattern is shown in fig. 1. The upper end of one short side of the primary sedimentation reservoir 1 is provided with a water inlet 11, the upper end of the other short side is provided with a water outlet 12, and a water pump 13 is arranged behind the water outlet. At least three rows of gabion filtering walls 14 are arranged at intervals of 1m from the long-side distance water inlet 11 of the primary sedimentation reservoir 1, the gabion filtering walls 14 are connected with the long side of the primary sedimentation reservoir 1, the thickness of the gabion filtering walls 14 is 20-40 cm, and the height of the gabion filtering walls is slightly higher than Chi Shen. Along the water inlet direction, crushed stones with different particle sizes are filled in different gabion walls and gabions, and the particle sizes of the crushed stones are gradually reduced from front to back.
Preferably, three rows of gabion filtering walls 14 are arranged at intervals of 1m from the long edge of the water inlet 11 of the primary sedimentation reservoir 1, and the particle sizes of the broken stones in the three rows of gabion filtering walls 14 are 15-10 cm, 5-10 cm and 3-5 cm respectively along the water inlet direction. A feed port 5 is arranged between the primary sedimentation reservoir 1 and the flocculation separation tank 2, and a polyaluminum ferric chloride flocculant solution with the mass concentration of 2% -5% is fed into the feed port 5, and the feeding speed of the polyaluminum ferric chloride flocculant solution is determined according to the flow rate/flow velocity of incoming water.
The preparation process of the polyaluminum ferric chloride flocculant solution comprises the following steps: firstly, mixing polyaluminium ferric chloride powder and tap water according to the mass ratio of 1:4, stirring to fully hydrolyze, standing until the mixture is reddish brown liquid, and then adding water to dilute the mixture to 2% -5%.
As shown in fig. 3, the flocculation separation tank 2 is disposed at the rear side of the feed inlet 5 at the water outlet end of the primary sedimentation reservoir 1, and the flocculation separation tank 2 comprises a cylindrical structure 22 with a first overflow pipe 21 at the upper end and a conical structure 23 with a first mud discharge pipe 24 at the lower end, and the specific shape is shown in fig. 2. Preferably, the diameter of the flocculation separation tank 2 is 80cm, the height of the cylindrical structure 22 is 80cm, and the included angle between the outer wall of the conical structure 23 and the axis is 20 degrees; the diameter of the first mud discharging pipe 24 is 10cm, the diameter of the first overflow pipe 21 is 20cm, the upper part of the first overflow pipe 21 is higher than the upper end of the cylindrical structure 22 by 20cm, and the depth of the lower end of the first overflow pipe 21 is equal to that of the cylindrical structure 22.
Further, the tube sedimentation tank 3 can adopt an upward flow tube sedimentation tank, water enters the distribution tank 4 from a water outlet after passing through the tube sedimentation tank 3, and then is connected with the irrigation main pipe 8 by the water pump 6. Preferably, the inclined tube sedimentation tank 3 comprises a zigzag sludge hopper 31 arranged at the bottom of the tank, a second sludge discharge pipe 32 arranged at the bottom of the sludge hopper 31, an inclined tube 33 arranged in the tank and a water collecting porous tube 34 arranged at the upper part of the tank, wherein the tail end of the water collecting porous tube 34 is communicated with the water distribution tank 4 through a second overflow pipe 35.
The water-sand separation system comprises a primary sedimentation reservoir 1, a flocculation separation tank 2, an inclined tube sedimentation tank 3 and a distribution tank 4, and comprises the following operation steps:
river water is introduced into the primary sedimentation reservoir 1 through the water inlet 11 during the period of river water discharge. Experimental analysis shows that sediment with the grain size of more than 0.1mm and other impurities entering the primary sedimentation reservoir 1 along with river water can be filtered by at least three rows of filtering gabion walls 14 with different grain sizes, and the primary sedimentation process of a high sediment water source is completed.
Preferably, the primary sedimentation reservoir 1, the flocculation separation tank 2, the inclined tube sedimentation tank 3 and the distribution tank 4 are communicated by a water pipe with the pipe diameter of 15-20 cm, the distribution tank 4 is a columnar tank with the depth of 120cm and the diameter of 50cm, a water pump 6 is arranged at the upper part of the distribution tank 4, and the water pump 6 conveys water in the distribution tank 4 to an irrigation main pipe 8.
When irrigation is needed, the water pump 13 at the water outlet 12 is turned on, and water is led to the feed inlet 5. And adding a polyaluminum ferric chloride flocculant solution with the concentration of 2-5% at the feed inlet 5, wherein the adding speed of the flocculant solution is determined according to the flow rate/flow velocity of incoming water. The fine particle sediment in river body has permanent negative charge due to lattice defect, isomorphous substitution and other reasons, and can be mutually bonded with cations in the polyaluminium ferric chloride to form flocculent precipitate. Therefore, when the river water added with the flocculant enters the flocculation separation tank 2, the river water generates turbulence and vortex phenomenon, so that the flocculant and the sediment with the grain size of 0.01-0.1 mm in the river water interact to form flocculation precipitation. When more river water enters, the river water overflows into the rear inclined tube settling pond 3 through the first overflow pipe 21. In the process, the flocculated sediment of the larger particles rapidly generated by the river agitation is settled to the first sludge discharge pipe 24, the smaller sediment is settled at the first overflow pipe 21, and the smaller sediment is re-entered into the conical structure 23 to form larger sediment and falls to the first sludge discharge pipe 24. When the irrigation process is stopped, due to the change of hydraulic conditions, river water entering the flocculation separation tank 2 but not entering the side inclined tube sedimentation tank 3 is discharged from the first sludge discharge pipe 24, and the effect of flushing and cleaning sludge discharge is achieved.
Small-particle-size sediment which is not completely flocculated and enters the side inclined tube sedimentation tank 3 along with water flow is flocculated in the inclined tube sedimentation tank 3 and discharged through the inclined tube sedimentation tank 3, and purified river water enters the distribution tank 4 and enters the irrigation main pipe 8 through the water pump 6. In addition, due to the binary acid-base characteristic of the aluminum element, the unconsumed flocculating agent also plays a role in buffering the pH of the soil to a certain extent after entering the soil along with irrigation water.
The sand blocking chamber 7 is arranged at the branch pipe of the main irrigation pipe, and the concrete structure is shown in fig. 4 and 5. Preferably, two pairs of side surfaces of the sand blocking chamber 7 are respectively provided with a main pipe water inlet 71 and a main pipe water outlet 72, other side surfaces of the sand blocking chamber 7 are provided with branch pipe water inlets 73, electrostatic composite fiber filter screens 75 are arranged at the branch pipe water inlets 73, and an observation port 74 is arranged on the top surface of the sand blocking chamber 7. Preferably, the sand blocking chamber 7 is a box body with the length multiplied by the width multiplied by the height of 50 multiplied by 30 cm; the main pipe water inlet 71 and the main pipe water outlet 72 are arranged at the central positions of the front and rear surfaces of the box body, and the diameter of the main pipe water inlet and the main pipe water outlet is 20cm; the branch pipe water inlet 73 is arranged at the center of the bottom of the side face of the box body, and the diameter of the branch pipe water inlet is 10cm.
After irrigation water enters the sand blocking chamber 7, the water enters the water inlets 73 of the branch pipes through the electrostatic composite fiber filter screen 75, and suspended impurities with extremely small particle sizes (smaller than 10 mu m) in the water are adsorbed and blocked by the electrostatic composite fiber filter screen 75 and remain in the sand blocking chamber. Impurities can be cleaned through the observation port 74 and the filter screen 75 can be cleaned after irrigation is finished. At this time, the irrigation water entering the irrigation branch pipe basically does not generate blocking phenomenon at the branch pipe and the spray head, thereby guaranteeing the safety of the whole irrigation system and improving the service life.
The invention also provides a method for constructing the irrigation water anti-blocking system, which comprises the following steps:
A. selecting an area near an irrigation area, planning a primary sedimentation reservoir 1 according to the area of the irrigation area, and sequentially designing a flocculation separation tank 2, an inclined tube sedimentation tank 3 and a distribution tank 4 at the rear side of the primary sedimentation reservoir;
B. determining the row number of gabion filtering walls 14 according to the irrigation water source characteristics of a greening area, constructing a primary sedimentation reservoir 1, connecting a water pipe with the diameter of 20cm and a water pump 13 at a water outlet 12 of the primary sedimentation reservoir 1, and arranging a feed inlet 5 at the rear side of the water pump 13;
C. a flocculation separation tank 2 is arranged at the position 1m behind the primary sedimentation reservoir 1, the flocculation separation tank 2 is formed by pouring concrete, the inner wall is smooth, the flocculation separation tank 2 is communicated with the inclined tube sedimentation tank 3 through a first overflow pipe 21, and then the inclined tube sedimentation tank 3 is connected with a distribution tank 4 and irrigation water is conveyed to an irrigation main pipe 8 through a water pump 6;
D. a sand blocking chamber 7 is arranged at the branch pipe of the irrigation main pipe, and an electrostatic composite fiber filter screen 75 is arranged at the side surface of the water inlet 73 of the branch pipe and 5cm away from the water inlet of the branch pipe.
The method for constructing the anti-blocking system for irrigation water is further described below by taking expressway green belt engineering in a certain northwest region of China as an example.
And (5) preparing on site.
An area is selected near the irrigation area, the size of the primary sedimentation reservoir 1 is planned according to the area of the irrigation area, and a flocculation separation tank 2, a tube sedimentation tank 3 and a distribution tank 4 are designed at the rear side of the primary sedimentation reservoir.
And constructing a water-sand separation system.
Because the irrigation water source in the greening area is river water with high sediment content for diversion, and the drainage time of the river water is discontinuous. Thus, a primary sedimentation reservoir 1 of width 2m, length 6m and depth 1.2m was constructed. 4 rows of gabion filtering walls 14 are constructed at intervals of 1m from the water inlet 11, gravel with different particle sizes is filled in the gabions respectively, the thickness is 30cm, and the particle sizes of the gravel are respectively 15-20 cm, 10-15 cm, 5-10 cm and 3-5 cm from front to back. The water outlet 12 is connected with a water pipe with the diameter of 20cm and a water pump 13, and a feed inlet 5 is arranged at the rear side of the water pump 13. And a flocculation separation tank 2 is arranged at the position 1m behind the primary sedimentation reservoir 1 according to the design size, the flocculation separation tank 2 is formed by concrete pouring, and the inner wall is ensured to be smooth. The first overflow pipe 21 of the flocculation separation tank 2 is connected to the tube settler 3, after which the tube settler 3 is connected to the distribution tank 4 and irrigation water is fed to the irrigation main pipe 8 by means of a lift pump 6.
Irrigation pipeline sand blocking
The irrigation main pipe is divided into branch pipes and is provided with a sand blocking chamber 7, the sand blocking chamber 7 is a 50 multiplied by 30cm box body, the main pipe water inlet 71 and the main pipe water outlet 72 are arranged at the center positions of the front and rear surfaces of the box body, and the diameter of the main pipe water inlet and the main pipe water outlet 72 is 20cm; the branch pipe water inlet 73 is arranged at the center of the bottom of the side face of the box body, and the diameter of the branch pipe water inlet is 10cm. The top of the sand blocking chamber 7 is provided with a viewing port 74, and the viewing port 74 is a cover with an impermeable gasket. An electrostatic composite fiber filter screen 75 with the size of 50 multiplied by 30cm is arranged along the side surface of the branch pipe water inlet 73 at a position 5cm away from the branch pipe water inlet.
According to the anti-blocking system for landscape irrigation by utilizing a high sediment water source and the construction method thereof, various garbage and sediment with different particle diameters in a river water source are intercepted in a grading manner through the water-sediment separation system before the water source enters an irrigation pipeline and the sediment blocking chamber in the irrigation pipeline; the sediment content entering the branch pipe and the spray head of the irrigation pipeline is greatly reduced. After the system is constructed, the following positive effects are achieved:
firstly, through preliminary filtration of a gabion filter wall in a preliminary sedimentation reservoir, large-particle sediment with the particle size of more than 0.1mm, other impurities and the like in incoming water are left in the preliminary sedimentation reservoir, and the sediment in outgoing water of the preliminary sedimentation reservoir is mainly particle suspended sediment with the particle size of less than 0.1mm and various suspended colloids.
Secondly, after river water added with flocculating agent such as polyaluminium ferric chloride enters a flocculation separation tank, sediment and suspended matters with the diameter of 0.1-0.01 mm react with the flocculating agent to form flocculent precipitate. And because of the special shape of the flocculation separation tank, turbulent flow and rotational flow can be generated, which is helpful for improving the speed and efficiency of the flocculation process. At this time, part of the flocculation sediment falls into the bottom of the flocculation separation tank and can be discharged by a sludge discharge pipe; and part of impurities such as sediment which cannot be flocculated fully enter the integrated tube sedimentation tank to be thoroughly removed. After the polymeric ferric aluminum chloride flocculant which is not completely consumed enters the soil along with an irrigation system, the polymeric ferric aluminum chloride flocculant has the effect of adjusting the pH of the soil to a certain extent based on the acid-base binary characteristic of aluminum.
Finally, after a few extremely fine particle impurities with the particle diameter smaller than 10 mu m which can not form flocculation precipitation enter an irrigation pipeline, the extremely fine particle impurities are adsorbed and filtered by an electrostatic composite fiber filter screen in a sand blocking chamber, so that irrigation water entering an irrigation branch pipe contains extremely small impurities, the blockage of the irrigation system is prevented, and the service lives of the branch pipe and a spray head are prolonged.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (8)
1. Utilize view irrigation water anti-blocking system of high silt water source, its characterized in that: including primary sedimentation cistern (1), flocculation separation pond (2), pipe-like sedimentation tank (3), distribution pond (4) that follow rivers direction intercommunication in proper order set up, still including setting up in the irrigation main pipe branch pipe department block sand room (7), primary sedimentation cistern (1) including set up water inlet (11) and delivery port (12) on two opposite sides of cell body upper portion respectively, set up water pump (13) and interval wall setting up in inside of the cell body gabion filter wall (14) of delivery port (12), be equipped with between primary sedimentation cistern (1) and flocculation separation pond (2) and throw feed inlet (5) of adding the flocculating agent, flocculation separation pond (2) are whole to be the top shape, flocculation separation pond (2) are equipped with cylindrical structure (22) of first overflow pipe (21) and conical structure (23) that the lower extreme was equipped with first mud discharge pipe (24) including the upper end, first overflow pipe (21) with pipe sedimentation tank (3) are linked together, pipe-like sedimentation tank (3) are the upward flow pipe-like down sedimentation tank (31), be in water pump (3) sedimentation tank (3) are in the setting up by second sedimentation tank (31) bottom (31), water pump (31) are set up by water distribution pond (31) bottom (31) The sand blocking device comprises an inclined tube (33) arranged in a pond and a water collecting porous tube (34) arranged on the upper portion of the pond, wherein the tail end of the water collecting porous tube (34) is communicated with a water distribution pond (4) through a second overflow tube (35), two pairs of side surfaces of the sand blocking chamber (7) are respectively provided with a main water inlet (71) and a main water outlet (72), other side surfaces of the sand blocking chamber (7) are provided with branch tube water inlets (73), electrostatic composite fiber filter screens (75) are arranged at the branch tube water inlets (73), and observation openings (74) are formed in the top surface of the sand blocking chamber (7).
2. The irrigation water anti-blocking system of claim 1, wherein: the primary sedimentation reservoir (1) is a cuboid reservoir, the depth is 0.8-1.2 m, and the width is 1.5-3 m; the long margin water inlet (11) of preliminary sedimentation cistern (1) every interval 1m sets up three row at least gabion filter wall (14), gabion filter wall (14) thickness is 20 ~ 40cm, highly is higher than Chi Shen, fill the rubble in the gabion of gabion filter wall (14), the particle diameter of rubble reduces from front to back gradually along the direction of intaking.
3. The irrigation water anti-blocking system of claim 1, wherein: and adding a polyaluminum ferric chloride flocculant solution with the mass concentration of 2% -5% into the feed port (5), wherein the adding speed of the polyaluminum ferric chloride flocculant solution is determined according to the flow rate/flow velocity of incoming water.
4. The irrigation water anti-blocking system according to claim 2, wherein: three rows of gabion filtering walls (14) are arranged at each interval of 1m from a long-side distance water inlet (11) of the primary sedimentation reservoir (1), and the particle sizes of broken stones in the three rows of gabion filtering walls (14) are 15-10 cm, 5-10 cm and 3-5 cm respectively along the water inlet direction.
5. The irrigation water anti-blocking system of claim 1, wherein: the diameter of the flocculation separation tank (2) is 80cm, the height of the cylindrical structure (22) is 80cm, and the included angle between the outer wall of the conical structure (23) and the axis is 20 degrees; the diameter of the first mud discharging pipe (24) is 10cm, the diameter of the first overflow pipe (21) is 20cm, the upper part of the first overflow pipe (21) is higher than the upper end of the cylindrical structure (22) by 20cm, and the depth of the lower end of the first overflow pipe (21) is equal to that of the cylindrical structure (22).
6. The irrigation water anti-blocking system of claim 1, wherein: the primary sedimentation reservoir (1), the flocculation separation tank (2), the inclined tube sedimentation tank (3) and the distribution tank (4) are communicated through a water pipe with the pipe diameter of 15-20 cm, the distribution tank (4) is a columnar tank with the depth of 120cm and the diameter of 50cm, a water pump (6) is arranged on the upper portion of the distribution tank (4), and the water pump (6) conveys water in the distribution tank (4) to an irrigation main pipe (8).
7. The irrigation water anti-blocking system of claim 1, wherein: the sand blocking chamber (7) is a box body with the length multiplied by the width multiplied by the height multiplied by 50 multiplied by 30 cm; the main pipe water inlet (71) and the main pipe water outlet (72) are arranged at the central positions of the front and rear surfaces of the box body, and the diameter of the main pipe water inlet is 20cm; the water inlets (73) of the branch pipes are arranged at the center of the bottom of the side face of the box body, and the diameter of the water inlets is 10cm.
8. A method of constructing an irrigation water anti-blocking system according to any of claims 1 to 7, wherein: the method comprises the following steps:
A. selecting an area near an irrigation area, planning a primary sedimentation reservoir (1) according to the area of the irrigation area, and sequentially designing a flocculation separation tank (2), an inclined tube sedimentation tank (3) and a distribution tank (4) at the rear side of the primary sedimentation reservoir;
B. determining the row number of gabion filtering walls (14) according to the irrigation water source characteristics of a greening area, constructing a primary sedimentation reservoir (1), connecting a water pipe with the diameter of 20cm and a water pump (13) at a water outlet (12) of the primary sedimentation reservoir (1), and arranging a feeding port (5) at the rear side of the water pump (13);
C. a flocculation separation tank (2) is arranged at the position 1m behind the primary sedimentation reservoir (1), the flocculation separation tank (2) is formed by pouring concrete, the inner wall is smooth, the flocculation separation tank (2) is communicated with the inclined tube sedimentation tank (3) through a first overflow pipe (21), and then the inclined tube sedimentation tank (3) is connected with a distribution tank (4) and irrigation water is conveyed to an irrigation main pipe (8) through a water pump (6);
D. a sand blocking chamber (7) is arranged at the branch pipe of the irrigation main pipe, and an electrostatic composite fiber filter screen (75) is arranged at the side surface of the water inlet (73) of the branch pipe and 5cm away from the water inlet of the branch pipe.
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| CN109174545B (en) * | 2018-11-23 | 2020-02-18 | 广州山水怡人园林生态有限公司 | Prevent blockking up clear gardens fountain pond with automatically, remove wadding |
| CN113106937B (en) * | 2021-04-09 | 2022-09-30 | 华北水利水电大学 | River is with water purification collection husky system |
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