CN115925034A - Phosphorus removal device based on light-oriented conversion and use method thereof - Google Patents
Phosphorus removal device based on light-oriented conversion and use method thereof Download PDFInfo
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- CN115925034A CN115925034A CN202211514044.7A CN202211514044A CN115925034A CN 115925034 A CN115925034 A CN 115925034A CN 202211514044 A CN202211514044 A CN 202211514044A CN 115925034 A CN115925034 A CN 115925034A
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention discloses a phosphorus removal device based on light-oriented conversion and a using method thereof, and belongs to the technical field of non-point source pollution control and water pollution treatment. The dephosphorizing device provided by the invention is characterized in that a grating, a light conversion module and a recovery module are arranged in a ditch, wherein the light conversion module comprises a light conversion module main body, a baffle plate, an ultraviolet lamp, a baffle plate and a first lifting device, and the recovery module comprises a recovery module box body, a collection box and a recovery box. The phosphorus removal device provided by the invention supplies power to the ultraviolet lamp and the motor through the solar power supply device, can realize the ultraviolet illumination condition without an external power supply, converts phosphorus into large granular phosphorus through the light orientation conversion process, and collects the newly formed large granular phosphorus through the recovery module so as to facilitate the subsequent utilization of waste phosphorus resources. The device of the invention can also be flexibly adjusted according to the height of the water level of the ditch in different seasons.
Description
Technical Field
The invention belongs to the technical field of non-point source pollution control and water pollution treatment, and particularly relates to a phosphorus removal device based on light-oriented conversion and a using method thereof.
Background
Agricultural surface runoff is a main way for loss of phosphorus in soil, and a large amount of phosphorus is input into surface water through runoff, so that environmental problems such as water eutrophication and the like are easily caused. Meanwhile, the phosphorus in the agricultural surface runoff has various loss forms, and different forms can be mutually converted. Therefore, the phosphorus is intercepted through the directional transformation process, and the method has an important effect on purifying agricultural surface runoff and reducing agricultural non-point source phosphorus pollution.
The ecological ditch is taken as one of the main process interception technical means for controlling the agricultural non-point source phosphorus pollution, and the ecological ditch is highly valued in recent years. At present, the existing ditches, ponds, cellars and the like are mainly and fully utilized in key areas, ecological ditches and surface runoff collecting, storing and recycling facilities are built, and farmland water drainage and surface runoff are purified. By means of the interception facilities such as the sediment capturing well and the phosphorus removal module arranged in the ditch, phosphorus can be effectively intercepted, and the ecological environment of the ditch is improved.
The Chinese invention patent with the patent number ZL201911072201.1 discloses an electrode biomembrane device for in-situ denitrification and dephosphorization of a farmland ditch and a use method thereof, and the device realizes the degradation of phosphorus in the tail water of the ditch through the dual actions of an electrochemical method and a biological method. Chinese invention patent No. ZL202010566294.X discloses a solar energy active water oxygenation nitrogen and phosphorus synchronous removal device and a purification method.
However, the existing intercepting and purifying device can remove phosphorus in agricultural runoff mainly through processes of physical adsorption, microorganism or plant absorption and the like, and can not remove phosphorus in different forms timely and effectively; meanwhile, the intercepted phosphorus cannot be recycled, so that a novel efficient phosphorus removal device is sought, and the method has important significance for effective removal of the phosphorus in agricultural runoff and resource utilization of the phosphorus.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a phosphorus removal device based on light-oriented conversion and a using method thereof on the premise of ensuring that the normal functions of irrigation and drainage of ditches and the like are not influenced.
The invention adopts the following specific technical scheme:
in a first aspect, the invention provides a phosphorus removal device based on light-oriented conversion, which comprises a grating, a light conversion module and a recovery module, wherein the grating, the light conversion module and the recovery module are arranged in a ditch;
along the water flow direction, the grating is arranged in front of the light conversion module. The light conversion module comprises a light conversion module main body, a baffle plate, an ultraviolet lamp, a baffle plate and a first lifting device. The light conversion module main body comprises plate bodies which are attached to two sides of the ditch, and the plate bodies on the two sides are respectively provided with a plurality of baffle plates which enable water flow to flow in a snake shape in a staggered manner. The ultraviolet lamps are embedded in the baffle plate and can irradiate the water body. Be equipped with the baffle that can adjust height through first elevating gear in the light conversion module main part, the face level of baffle sets up and can cover the cross section of light conversion module main part basically, has seted up a plurality of round holes on the baffle and can pass the slot of baffling board. The circular holes are filled with geotextile and are bonded and fixed, and the geotextile is wrapped with mixed filler for intercepting granular pollutants.
The recovery module comprises a recovery module box body, a collection box and a recovery box. The bottom of the collecting box is fixed at the bottom of the ditch, and the open top is fixedly connected with the bottom of the light conversion module main body and forms a whole with communicated inner cavities. The collecting box is provided with a first hole which is communicated with a second hole on the recovery box through a pipeline. A first gate is arranged on the first hole, and a second gate is arranged on the second hole. Collecting box both sides inner wall is provided with the sunshade that is used for shutoff geotechnological cloth parallel with the rivers direction, and the sunshade can carry on spacingly to the extreme lower position of baffle.
The recycling module box body is located behind the light conversion module, the bottom of the recycling module box body is fixed at the bottom of water flow, the top of the recycling module box body is provided with a detachable top cover of the recycling module box body, and the recycling module box body and the top cover of the recycling module box body jointly form a box body structure with a sealed inner cavity. The bottom in the recovery module box body is provided with a cover-free detachable recovery box, and a top cover of the recovery module box body is fixedly provided with a vacuum pump for generating negative pressure to the sealed inner cavity.
Preferably, the plate surface of each baffle plate is perpendicular to the water flow direction, the length of each baffle plate is smaller than the width of the cross section of the light conversion module main body, a circulation channel is reserved between each baffle plate and the side wall of the light conversion module main body, the circulation channels between two adjacent baffle plates and the side wall of the light conversion module main body are positioned on different sides of the light conversion module main body, and an arched water flow channel is formed in the light conversion module main body under the flow guidance of the baffle plates.
Preferably, the phosphorus removal device further comprises a first fixing rod positioned between the grating and the light conversion module body. The first fixing rod is vertically arranged in the ditch, a second lifting device capable of moving along the axial direction of the rod body is arranged on the first fixing rod, and the first liquid level monitor and the first detector are arranged on the second lifting device.
The collecting box is also internally provided with a second liquid level monitor for monitoring the liquid level condition in the collecting box and a second detector for monitoring the water quality condition.
Further, the phosphorus removal device further comprises a sensor module. The sensor module includes a first control unit, a second control unit, a third control unit, a fourth control unit, and a fifth control unit.
The second lifting device can receive signals of the fourth control unit so as to adjust the positions of the first liquid level monitor and the first detector.
The first lifting device is internally provided with a motor, and the motor can receive a signal of the first control unit so as to control the position of the horizontal height of the baffle plate through the first lifting device.
The collecting box is also internally provided with an adjusting device and a second control unit. The adjusting device is connected with the first gate through a connecting piece. The adjusting device can receive signals of the second control unit so as to control the opening and closing of the first hole in the collecting box through the first gate.
The second gate is connected with a third control unit which can control the second gate to open and close. The vacuum pump is communicated with a pagoda joint embedded on the top cover of the recovery module box body through a hose provided with an electric three-way valve. The vacuum pump and the electric three-way valve are controlled by signals of the fifth control unit.
Furthermore, the first detector and the second detector are used for detecting the concentration, turbidity and density of phosphate.
Preferably, a light conversion module top plate parallel to the water flow direction is fixedly connected above the light conversion module main body, and a solar power supply device higher than the horizontal plane is arranged on the light conversion module top plate. The solar power supply device is connected with the power consumption device through a waterproof wire to supply power.
Preferably, the geotextile-wrapped hybrid filler comprises a fine-particle filler and a coarse-particle filler. The fine particle filler comprises one or more of blast furnace slag, steel slag or carbide slag, the particle size of the filler is 2-4mm, the coarse particle filler comprises one or more of ceramsite, zeolite or gravel, and the particle size of the filler is 5-8mm.
Preferably, the pipe is a corrugated pipe.
Preferably, the light conversion module may be provided in plurality along the water flow direction.
Preferably, a plurality of ultraviolet lamps embedded in the baffle plate can be arranged.
Preferably, the height of the collecting box is not more than 10cm;
preferably, the width of the recovery module box body is less than half of the width of the top of the ditch.
Preferably, the first lifter is higher than the baffle plate.
In a second aspect, the invention provides a method for removing phosphorus by utilizing the phosphorus removal device of the first aspect through light-oriented conversion, which comprises the following steps:
impurities with larger particle sizes in the ditch water are intercepted through the grating, and meanwhile, the flow rate of drainage is reduced; the water flow intercepted by the grating is detected through a first liquid level monitor and a first detector, and the first detector is used for detecting the concentration, turbidity and density of phosphate in the discharged water.
And then the water flow enters the light conversion module, and is intercepted and buffered by the baffle plate, so that the water flow speed is reduced. The ultraviolet lamp irradiates the water flow with ultraviolet light, and the fine particle phosphorus in the water flow is flocculated and agglomerated into large particle phosphorus under the irradiation of the ultraviolet light. Organic phosphorus in water flow generates inorganic phosphate in a light mineralization process under the irradiation of ultraviolet light, the inorganic phosphate is adsorbed by fine granular substances to form fine granular phosphorus, the fine granular phosphorus is flocculated and aggregated into large granular phosphorus after the irradiation of the ultraviolet light, and a small part of unadsorbed inorganic phosphate flows out of the device along with the drainage and is absorbed and utilized by aquatic plants in the ditch. The large granular phosphorus is settled under the action of slow flow of the baffle plates arranged in a staggered way.
The baffle plate moves downwards by periodically controlling the first lifting device, so that the generated large granular phosphorus is settled and enters the collection box. When the baffle falls to light conversion module main part bottom, geotechnological cloth and sunshade closely laminate, and first gate is opened, and the suction effect through the vacuum pump makes the big granule attitude phosphorus in the collection box get into the collection box through the pipeline simultaneously, realizes that the plain phosphorus of rivers in gets rid of.
Compared with the prior art, the invention has the following beneficial effects:
(1) The dephosphorization device provided by the invention changes the positions of the first detector and the first liquid level monitor by adjusting the second lifting device on the first fixed rod, so that phosphorus in the ditch drainage water at different water levels can be removed, the dephosphorization device can automatically adjust the drainage water at different water levels of ditches in different seasons, and effective purification is realized;
(2) The first detector in the phosphorus removal device provided by the invention can detect the concentration, turbidity and density of phosphate in the drainage water of the ditch. When the phosphate in the drainage water of the ditch exceeds a certain concentration, an ultraviolet lamp switch is turned on; when the detector detects that the phosphate in the water does not exceed a certain concentration, the ultraviolet lamp switch is turned off, so that the service life of the ultraviolet lamp can be prolonged, and the replacement frequency of the lamp tube is reduced;
(3) The top cover of the recovery module box body in the phosphorus removal device provided by the invention can be flexibly disassembled, and when a third liquid level monitor in the recovery box receives a signal, the top cover of the recovery module box body can be disassembled to replace the recovery box in time so as to prolong the service life of the recovery module;
(4) The phosphorus removal device provided by the invention supplies power to the ultraviolet lamp and the motor through the solar power supply device, and the ultraviolet illumination condition can be realized without an external power supply; through the cooperation use of ultraviolet lamp, baffle and collection box, not only can realize getting rid of the phosphorus in the ditch drainage, can also be through the light orientation conversion process, turn into the phosphorus large particle state phosphorus, through retrieving the module, collect the large particle state phosphorus of newly forming to the follow-up utilization of abandonment phosphorus resource.
Drawings
FIG. 1 is a top view of a phosphorus removal device according to the present invention;
FIG. 2 is a cross-sectional view of the light conversion module and collection box of FIG. 1;
FIG. 3 is a longitudinal cross-sectional view of the recovery module housing of FIG. 1;
FIG. 4 is an enlarged schematic view of the collection bin;
FIG. 5 is a top view of the baffle of FIG. 1;
FIG. 6 is an enlarged view of the first fixing rod of FIG. 1;
in the figure: the device comprises a solar power supply device 1, a baffle plate 2, an ultraviolet lamp 3, geotextile 4, a grid 5, a first fixing rod 6-1, a first lifting device 7-1, a second lifting device 7-2, a first control unit 8-1, a second control unit 8-2, a third control unit 8-3, a fourth control unit 8-4, a fifth control unit 8-5, a recovery module box body 9, a pipeline 10, a light conversion module top plate 11, a baffle plate 12, a collection box 13, a shielding plate 40, a light conversion module main body 14, an adjusting device 15, a first gate 16, a first hole 17, a connecting piece 18, a second gate 19, a recovery box 20, a vacuum pump 21, a recovery module box body top cover 22, a pagoda joint 23, a hose 24, an electric three-way valve 25, a first liquid level monitor 51-1, a second liquid level monitor 51-2, a third liquid level monitor 51-3, a first detector 52-1 and a second detector 52-2.
Detailed Description
The invention is further illustrated and described below with reference to the drawings and the detailed description. The technical characteristics of the embodiments of the invention can be correspondingly combined without mutual conflict.
Unless otherwise stated, the terms "front" and "rear" in the present invention refer to the direction of water flow.
As shown in FIG. 1, the present invention provides a specific embodiment of a phosphorus removal device based on light-oriented conversion, comprising a grating 5, a first fixing rod 6-1, a light conversion module and a recovery module arranged in a trench, wherein the grating 5, the first fixing rod 6-1 and the light conversion module are arranged in sequence along a water flow direction. In practical application, a sensor module is further arranged to realize intelligent adjustment, and the sensor module comprises a first control unit 8-1, a second control unit 8-2, a third control unit 8-3, a fourth control unit 8-4 and a fifth control unit 8-5. The structure and connection of the respective portions will be specifically described below.
In practical applications, the grating 5 preferably has a porous box-type structure, i.e., the surface of the grating perpendicular to the water flow direction is a porous surface. Grid 5 bottoms are fixed in the irrigation canals and ditches bottom, and its top keeps and irrigation canals and ditches top parallel and level, and the width of grid 5 is the same with the irrigation canals and ditches width, ensures that the irrigation canals and ditches drainage can flow through grid 5 completely, holds back great particle diameter debris such as rubbish piece, dead branch fallen leaves, silt rubble in the irrigation canals and ditches drainage through setting up 5 machinery of grid to reduce the velocity of water flow, slowed down the impact of rivers and debris to follow-up light conversion module.
As shown in fig. 6, the first fixing rod 6-1 is provided with a second lifting device 7-2, and the first liquid level monitor 51-1 and the first detector 52-1 are arranged on the second lifting device 7-2. The second lifting device 7-2 receives signals from the fourth control unit 8-4 to adjust the positions of the first liquid level monitor 51-1 and the first detector 52-1, and detects the drainage intercepted by the grating 5. When the first liquid level monitor 51-1 does not detect a water level signal, the fourth control unit 8-4 adjusts the positions of the first liquid level monitor 51-1 and the first detector 52-1 through the lifting device 7-2, so that the first detector 52-1 can detect the phosphate concentration, turbidity and density of the drainage water of the ditch at the low water level, and the dephosphorization device can automatically adjust the drainage water at different water levels of ditches in different seasons to realize effective purification.
After interception by the grating 5 and detection by the first liquid level monitor 51-1 and the first detector 52-1, the drainage water of the ditch enters the light conversion module main body 14.
The light conversion module comprises a light conversion module main body 14, a baffle plate 2, an ultraviolet lamp 3, a baffle plate 12, a first lifting device 7-1 and a first control unit 8-1.
As shown in fig. 2, a light conversion module top plate 11 parallel to the water flow direction is fixedly connected above the light conversion module main body 14, so that the light conversion module main body and the light conversion module top plate together form an inverted U-shaped structure. The solar power supply device 1 higher than the horizontal plane is arranged on the top plate 11 of the light conversion module, and the solar power supply device 1 is connected with a power consumption device through a waterproof wire to supply power. The power consumption device comprises a first lifting device 7-1, a second lifting device 7-2, an ultraviolet lamp 3, a motor and the like. The light conversion module main body 14 is of a base-free box structure, the first control unit 8-1 is fixed below the light conversion module top plate 11, and a motor for receiving a signal of the first control unit 8-1 is arranged in the first lifting device 7-1. The baffle 12 is connected with the first lifting device 7-1, in this embodiment, the first lifting device 7-1 comprises a fixing rod and a slide rail which are vertically arranged, the slide rail is vertically fixed on the fixing rod, one side of the baffle is slidably connected with the slide rail, and the baffle can vertically move up and down along the slide rail. Of course, the first lifting device may also adopt other existing structures as long as the baffle can move up and down in the vertical direction. The motor controls the position of the horizontal height of the baffle 12 through the slide rail, and the baffle 12 is detachably connected with the first lifting device 7-1 in a fixing mode so as to replace the baffle 12 as required. In order to prolong the service life, the surfaces of the first lifting device 7-1 and the first control unit 8-1 can be coated with waterproof materials so as to slow down the corrosion of the drainage water of the ditches to the materials.
A plurality of baffle plates 2 which can make the water flow in a snake shape are respectively arranged at two sides in the light conversion module main body 14 in a staggered way. The plate surface of each baffle plate 2 is vertical to the water flow direction, the length of each baffle plate is smaller than the width of the cross section of each ditch, so that a circulation channel is reserved between each baffle plate and the side wall of the device, and the circulation channels between two adjacent baffle plates and the side wall of the device are positioned on different sides of the device, therefore, as can be seen from figure 1, an arched water flow channel is formed inside the phosphorus removal device under the flow guidance of the baffle plates 2.
The ultraviolet lamp 3 is embedded in the baffle plate 2 and can irradiate the water body. In practical applications, a plurality of ultraviolet lamps 3 embedded in the baffle plate 2 can be arranged to increase the light conversion efficiency. Because the plurality of baffle plates 2 are arranged in the light conversion module main body 14 in a staggered mode, after ditch drainage water flows through the light conversion module main body 14, an arched water flow channel is formed through the diversion of the baffle plates 2, the retention time of the ditch drainage water in the light conversion module main body 14 is prolonged, and the treatment time of the ultraviolet lamp 3 on water flow is prolonged.
The width of the baffle is the same as the inner width of the light conversion module main body 14, and the plate surface of the baffle 12 is horizontally arranged. As shown in fig. 5, the baffle 12 is provided with a plurality of round holes and rectangular holes capable of passing through the baffle 2. The circular holes are filled with geotextile 4 and are bonded and fixed, and the geotextile 4 is wrapped with mixed filler filled with coarse particle filler and fine particle filler. Wherein, the coarse particle filler can adopt one or more of ceramsite, zeolite and gravel with the particle size of 5-8mm, and the fine particle filler can adopt one or more of blast furnace slag, steel slag and carbide slag with the particle size of 2-4 mm. The coarse and fine particle fillers in the mixed filler are uniformly mixed, so that pollutants forming granular phosphorus can be intercepted by the geotextile 4 and cannot flow above the baffle 12 along with water flow.
Through the action of the baffle plate 2 and the ultraviolet lamp 3 and the lifting of the baffle plate 12, the light conversion module removes phosphorus discharged from the ditch.
The recovery module comprises a collection box 13, a recovery module box 9, a pipeline 10, an adjusting device 15, a first gate 16, a first hole 17, a connecting piece 18, a second gate 19, a recovery box 20, a vacuum pump 21, a recovery module box top cover 22, a pagoda joint 23, a hose 24 and an electric three-way valve 25.
As shown in fig. 2, the collection box 13 is a top-less box structure fixed at the bottom of the trench, the top of the collection box 13 is connected with the light conversion module main body 14, and the connection mode preferably adopts detachable connection. As shown in FIG. 4, a first hole 17 is formed on one side of the collection box 13 close to the recovery module box 9, the first hole 17 is communicated with a second hole on the recovery box 20 through a pipeline 10, and a sealing waterproof material is sprayed on the joint to prevent drainage of the ditch from seeping. A first gate 16 is arranged on the first hole 17, and a second gate 19 is arranged on the second hole. The inner walls of two sides of the collecting box 13 are provided with shielding plates 40 which are parallel to the water flow direction and used for plugging the geotextile 4, and the shielding plates 40 are used for limiting the lowest position of the baffle plate 12.
An adjusting device 15 is fixed above the first hole 17, and a second control unit 8-2 is fixed on the adjusting device 15. The first gate 16 can block and open the first hole 17 through the adjusting device 15, the connecting piece 18 is connected with the gate 16, and the first gate 16 receives the signal of the second control unit 8-2 through the adjusting device 15 to realize the opening and closing of the first hole 17 on the collecting box 13. In this embodiment, the connecting member 18 may be a string or a rod.
In practical applications, the pipe 10 may be a corrugated pipe in consideration of the external pressure resistance, impact resistance, flexibility, and inner wall friction of the pipe.
As shown in fig. 3, the bottom of the recovery module box 9 is fixed at the bottom of the water flow, the top of the recovery module box 9 is provided with a detachable recovery module box top cover 22, and the recovery module box 9 and the recovery module box top cover 22 jointly form a box structure with a sealed inner cavity; the bottom in the recovery module box body 9 is provided with a recovery box 20 which is detachable without a cover, and a top cover 22 of the recovery module box body is fixedly provided with a vacuum pump 21 which is used for generating negative pressure to the sealed inner cavity.
The upper part of the second hole on the recovery box 20 is provided with a second gate 19 which is controlled by a third control unit 8-3 to open and close. The vacuum pump 21 is communicated with a pagoda joint 23 embedded on a top cover 22 of the recovery module box body through a hose 24 provided with an electric three-way valve 25, and the vacuum pump 21 and the electric three-way valve 25 are controlled by signals of a fifth control unit 8-5.
The collecting box 13 is also internally provided with a second liquid level monitor 51-2 for monitoring the liquid level condition in the collecting box and a second detector 52-2 for monitoring the water quality condition. The second detector 52-2 is used for detecting the concentration, turbidity and density of phosphate.
In practical applications, the height of the collection box 13 is not more than 10cm, and the size of the horizontal cross section is not smaller than the size of the bottom cross section of the upper light conversion module body 14. The width of the recovery module box 9 is less than half of the width of the top of the ditch. The height of the first lifting device 7-1 is higher than the height of the plate surface of the baffle plate 2.
In practical application, the dephosphorizing device can be flexibly arranged according to the water level of ditches in different seasons, if the water level of the ditches in summer is at a high water level, the baffle plates embedded with the ultraviolet lamps can be arranged along the water flow direction, so that the drainage of the ditches is fully treated. When the water level of the ditch is in a low water level in winter, only two baffle plates embedded with ultraviolet lamps can be reserved, even the baffle plates are removed, so that the cost is saved, namely the device can be flexibly installed and detached according to the requirement.
The following details describe a method for removing phosphorus by photo-directional conversion of a farmland ditch based on the phosphorus removal device, and the method comprises the following steps:
firstly, the grating 5 intercepts sundries with larger particle sizes, such as garbage fragments, dry branches and fallen leaves, silt and broken stones and the like in the drainage of the ditch, simultaneously reduces the drainage flow rate of the ditch, prolongs the hydraulic retention time, and reduces the impact of the water flow on the subsequent first fixing rod 6-1 and the light conversion module.
The first liquid level monitor 51-1 and the first detector 52-1 which are arranged on the first fixing rod 6-1 detect the drained water intercepted by the grating 5, and when the first liquid level monitor 51-1 does not detect a water level signal, the fourth control unit 8-4 adjusts the positions of the first liquid level monitor 51-1 and the first detector 52-1 through a motor in the second lifting device 7-2, so that the first detector 52-1 can detect the phosphate concentration, turbidity and density of the drained water in a ditch at a low water level. After the interception by the grating 5 and the detection by the first liquid level monitor 51-1 and the first detector 52-1, the drainage water of the ditch slowly enters the light conversion module main body 14, and through the action of the baffle plate 2 and the ultraviolet lamp 3 and the lifting of the baffle plate 12, the light conversion module removes the phosphorus in the drainage water of the ditch, and the specific process is as follows:
s1: the ditch drainage water flows through the plurality of baffle plates 2 which are arranged in the light conversion module main body 14 in a staggered mode, the retention time of the ditch drainage water in the light conversion module main body 14 is prolonged through the slow flow effect of the baffle plates 2, and the treatment time of the ultraviolet lamp 3 on the water flow is prolonged.
S2: the ultraviolet lamp 3 performs ultraviolet irradiation treatment on the ditch drainage flowing into the light conversion module main body 14, under the irradiation of ultraviolet light, fine granular phosphorus in the ditch drainage can be converted into large granular phosphorus, and meanwhile, the ultraviolet light can be used for oxidizing organic phosphorite in the ditch drainage into inorganic phosphate. The newly formed large granular phosphorus is gradually settled to the collection box 13 as the water flow speed is reduced under the blocking action of the baffle plate 2, and simultaneously, organic phosphorus is converted into inorganic phosphate in the ultraviolet mineralization process, the generated inorganic phosphate can be adsorbed on fine particles in the drainage water of the ditches to form fine granular phosphorus, and the newly formed fine granular phosphorus can also be converted into large granular phosphorus and settled to the collection box 13 under the irradiation of ultraviolet light. When the second detector 52-2 fixed on the inner side of the collection box 13 detects that the turbidity and the density are higher than the detection values of the first detector 52-1, the first control unit 8-1 controls the first lifting device 7-1 to move the baffle plate 12 downwards, so that the phosphorus in the large granular state is accelerated to sink to the collection box 13, and the phosphorus in the large granular state does not flow out along with the discharged water flow under the interception action of the geotextile 4. Therefore, the phosphorus migration ability in the ditch drainage water is reduced under the action of the ultraviolet lamp 3, and the water is continuously converted into large granular phosphorus which is moved by the baffle 12 and intensively precipitated to the collection box 13; a small part of unadsorbed inorganic phosphate can be absorbed and utilized by aquatic plants in the ditch after the drainage flows out of the device, so that the removal of phosphorus in the drainage of the ditch is enhanced.
S3: after the light conversion module converts the phosphorus in the ditch drainage into the large granular phosphorus, the collection box 13 in the recovery module collects the large granular phosphorus, and the second liquid level monitor 51-2 fixed on the inner side of the collection box detects the water level of the suspension in the collection box 13. The recovery module is divided into two conditions for the recovery process of the large granular phosphorus in the collection box:
(1) When the second liquid level monitor 51-2 detects a water level signal in the collection box, the baffle 12 reaches the bottommost part of the first lifting device 7-1, the shield plate 40 is tightly attached to the geotextile 4 on the baffle 12 and closed, the second control unit 8-2 pulls up the connecting piece 18 through the control adjusting device 15 to open the first gate 16, meanwhile, the fifth control unit 8-5 opens and closes the vacuum pump 21 through opening the vacuum pump 21 and adjusting the electric three-way valve 25, so that the pagoda joint 23 and the vacuum pump 21 are kept in a communicated state, and turbid liquid of the collection box 13 enters the recovery box 20 through the pipeline 10 under the action of pressure difference.
(2) When the second liquid level monitor 51-2 fails to detect the water level signal, the control unit 8-5 turns off the vacuum pump 21. Meanwhile, the third control unit 8-3 lowers the second valve 19 to block the second hole on the inner side of the recovery tank, so that backflow is prevented. The fifth control unit 8-5 adjusts the electric three-way valve 25 to close the communication between the pagoda junction 23 and the vacuum pump 21.
In practical application, when the third liquid level monitor 51-3 in the recycling bin receives a signal, the recycling bin 20 can be replaced in time by detaching the top cover 22 of the recycling module bin body, so that the service life of the recycling module is prolonged.
In addition, the first detector 52-1 arranged on the first fixing rod 6-1 can detect the phosphate concentration in the drainage water of the ditch, when the phosphate concentration in the drainage water is lower than the local water quality requirement or the middle limit value of the ground surface water environment quality standard, the light conversion module and the recovery module do not need to be operated to remove the phosphorus in the drainage water, the drainage water of the ditch can be directly discharged, and the ultraviolet lamp switch is turned off under the condition, so that the service life of the ultraviolet lamp can be prolonged, and the replacement frequency of the lamp tube can be reduced. Therefore, utilize the phosphorus removal device of this application, use through the cooperation of ultraviolet lamp, baffle and collection box, not only can realize getting rid of aquatic phosphorus, can also turn into the phosphorus large particle state phosphorus through the light orientation conversion process, through retrieving the module, collect the large particle state phosphorus of new formation to the follow-up utilization of abandonment phosphorus resource.
The above-described embodiments are merely preferred embodiments of the present invention, and are not intended to limit the present invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.
Claims (10)
1. A dephosphorization device based on light-oriented conversion is characterized by comprising a grid (5) arranged in a ditch, a light conversion module and a recovery module;
along the water flow direction, the grating (5) is arranged in front of the light conversion module; the light conversion module comprises a light conversion module main body (14), a baffle plate (2), an ultraviolet lamp (3), a baffle plate (12) and a first lifting device (7-1); the light conversion module main body (14) comprises plate bodies which are attached to the two sides of the ditch, and a plurality of baffle plates (2) which can enable water flow to flow in a snake shape are respectively arranged on the plate bodies on the two sides in a staggered mode; the ultraviolet lamp (3) is embedded in the baffle plate (2) and can irradiate the water body; a baffle (12) capable of adjusting the height through a first lifting device (7-1) is arranged in the light conversion module main body (14), the surface of the baffle (12) is horizontally arranged and can basically cover the cross section of the light conversion module main body (14), and a plurality of round holes and rectangular holes capable of penetrating through the baffle plate (2) are formed in the baffle (12); the circular holes are filled with geotextile (4) and are bonded and fixed; the geotextile (4) is wrapped with a mixed filler for intercepting granular pollutants;
the recovery module comprises a recovery module box body (9), a collection box (13) and a recovery box (20); the bottom of the collection box (13) is fixed at the bottom of the ditch, and the open top is fixedly connected with the bottom of the light conversion module main body (14) to form a whole with communicated inner cavities; the collecting box (13) is provided with a first hole (17), and the first hole (17) is communicated with a second hole on the recovery box (20) through a pipeline (10); a first gate (16) is arranged on the first hole (17), and a second gate (19) is arranged on the second hole; the inner walls of the two sides of the collecting box (13) are provided with shielding plates (40) which are parallel to the water flow direction and used for plugging the geotextile (4), and the shielding plates (40) can limit the lowest position of the baffle (12);
the recycling module box body (9) is positioned behind the light conversion module, the bottom of the recycling module box body is fixed to the bottom of water flow, the top of the recycling module box body is provided with a detachable recycling module box body top cover (22), and the recycling module box body (9) and the recycling module box body top cover (22) jointly form a box body structure with a sealed inner cavity; a cover-free detachable recovery box (20) is arranged at the bottom in the recovery module box body (9); and a top cover (22) of the recovery module box body is fixedly provided with a vacuum pump (21) for generating negative pressure to the sealed inner cavity.
2. The phosphorus removal device based on the light-oriented conversion is characterized in that the plate surfaces of the baffle plates (2) are perpendicular to the water flow direction, the length of each baffle plate (2) is smaller than the width of the cross section of the light conversion module main body (14), so that a flow channel is reserved between each baffle plate (2) and the side wall of the light conversion module main body (14), the flow channels between two adjacent baffle plates (2) and the side wall of the light conversion module main body (14) are positioned on different sides of the light conversion module main body (14), and an arched water flow channel is formed in the light conversion module main body (14) under the flow guidance of the baffle plates (2).
3. A device for phosphorous removal based on light-oriented conversion as claimed in claim 1, further comprising a first fixing rod (6-1) located between the grid (5) and the light conversion module body (14); the first fixing rod (6-1) is vertically arranged in the ditch, a second lifting device (7-2) capable of moving along the axial direction of the rod body is arranged on the first fixing rod, and the first liquid level monitor (51-1) and the first detector (52-1) are arranged on the second lifting device (7-2);
and a second liquid level monitor (51-2) for monitoring the liquid level condition in the collection box (13) and a second detector (52-2) for monitoring the water quality condition are also arranged in the collection box (13).
4. The device of claim 3, further comprising a sensor module; the sensor module comprises a first control unit (8-1), a second control unit (8-2), a third control unit (8-3), a fourth control unit (8-4) and a fifth control unit (8-5);
the second lifting device (7-2) can receive signals of the fourth control unit (8-4) to adjust the positions of the first liquid level monitor (51-1) and the first detector (52-1);
a motor is arranged in the first lifting device (7-1), and the motor can receive a signal of the first control unit (8-1) to control the position of the horizontal height of the baffle (12) through the first lifting device (7-1);
the collecting box (13) is also internally provided with an adjusting device (15) and a second control unit (8-2); the adjusting device (15) is connected with the first gate (16) through a connecting piece (18); the adjusting device (15) can receive signals of the second control unit (8-2) to control the opening and closing of the first gate (16) through the connecting piece (18);
the second gate (19) is connected with a third control unit (8-3) capable of controlling the opening and closing of the second gate; the vacuum pump (21) is communicated with a pagoda joint (23) embedded on a top cover (22) of a recovery module box body through a hose (24) provided with an electric three-way valve (25); the vacuum pump (21) and the electric three-way valve (25) are controlled by signals of a fifth control unit (8-5).
5. The phosphorus removal device based on light-oriented conversion as claimed in claim 4, wherein the first detector (52-1) and the second detector (52-2) are used for detecting the concentration, turbidity and density of phosphate.
6. The phosphorus removal device based on light-oriented conversion as claimed in claim 1, wherein a light conversion module top plate (11) parallel to the water flow direction is fixedly connected above the light conversion module main body (14); the top plate (11) of the light conversion module is provided with a solar power supply device (1) higher than the horizontal plane; the solar power supply device (1) is connected with a power consumption device through a waterproof wire to supply power.
7. The phosphorus removal device based on light-oriented conversion is characterized in that the geotextile (4) wrapped mixed filler comprises a fine particle filler and a coarse particle filler; the fine particle filler comprises one or more of blast furnace slag, steel slag or carbide slag, and the particle size of the filler is 2-4mm; the coarse particle filler comprises one or more of ceramsite, zeolite or gravel, and the particle size of the filler is 5-8mm.
8. A phosphorus removal device based on light-oriented conversion as claimed in claim 1, wherein the pipeline (10) is a corrugated pipe; a plurality of light conversion modules can be arranged along the water flow direction; a plurality of ultraviolet lamps (3) embedded in the baffle plate (2) can be arranged.
9. A device for phosphorous removal based on photo-directional conversion as claimed in claim 1, wherein the height of the collection box (13) does not exceed 10cm; the width of the recovery module box body (9) is less than half of the width of the top of the ditch; the height of the first lifting device (7-1) is higher than that of the baffle plate (2).
10. A method for removing phosphorus by utilizing the phosphorus removal device of any one of claims 1 to 9 through light-oriented conversion, which is characterized by comprising the following steps:
impurities with larger particle sizes in the ditch water are intercepted through the grating (5), and the drainage flow rate is reduced; detecting the water flow intercepted by the grating (5) through a first liquid level monitor (51-1) and a first detector (52-1), wherein the first detector (52-1) is used for detecting the concentration, turbidity and density of phosphate in the drainage water;
then the water flow enters the light conversion module, and is intercepted and buffered through the baffle plate (2), so that the water flow speed is reduced; the ultraviolet lamp (3) illuminates the water flow by utilizing ultraviolet light; flocculating and agglomerating the fine granular phosphorus in the water flow into large granular phosphorus under the irradiation of ultraviolet light; organic phosphorus in water flow is subjected to a light mineralization process under the irradiation of ultraviolet light to generate inorganic phosphate, the inorganic phosphate is adsorbed by fine granular substances to form fine granular phosphorus, the fine granular phosphorus is flocculated and aggregated into large granular phosphorus after the irradiation of the ultraviolet light, and a small part of unadsorbed inorganic phosphate flows out of the device along with drainage water and is absorbed and utilized by aquatic plants in the ditch; the large granular phosphorus is settled under the action of the slow flow of the baffle plates (2) which are arranged in a staggered way;
the baffle (12) is moved downwards by periodically controlling the first lifting device (7-1) so as to enable the generated large granular phosphorus to settle and enter the collection box (13); when baffle (12) drop to light conversion module main part (14) bottom, geotechnological cloth (4) and sunshade (40) closely laminate, first gate (16) are opened, simultaneously through the suction effect of vacuum pump (21), make the big granule state phosphorus in collecting box (13) get into collection box (20) through pipeline (10), realize that the phosphorus in the rivers is got rid of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211514044.7A CN115925034A (en) | 2022-11-29 | 2022-11-29 | Phosphorus removal device based on light-oriented conversion and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211514044.7A CN115925034A (en) | 2022-11-29 | 2022-11-29 | Phosphorus removal device based on light-oriented conversion and use method thereof |
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| CN115925034A true CN115925034A (en) | 2023-04-07 |
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| CN202211514044.7A Pending CN115925034A (en) | 2022-11-29 | 2022-11-29 | Phosphorus removal device based on light-oriented conversion and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117023791A (en) * | 2023-08-11 | 2023-11-10 | 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所) | Ecological regulation pond front-end device for strengthening particulate matter deposition effect |
-
2022
- 2022-11-29 CN CN202211514044.7A patent/CN115925034A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117023791A (en) * | 2023-08-11 | 2023-11-10 | 生态环境部华南环境科学研究所(生态环境部生态环境应急研究所) | Ecological regulation pond front-end device for strengthening particulate matter deposition effect |
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