WO2021093219A1 - Blue algae concentration device and continuous concentration method - Google Patents

Abstract

A blue algae concentration device and a continuous concentration method. Said device comprises a lifting frame (6) and a plurality of filter units (18) which are provided within a support (1), the top of each filter unit (18) is rotatably connected to a top rod of the support (1), the bottom of the filter unit (18) is rotatably connected to the lifting frame (6), a main water inlet pipe (12) is provided at one side of the filter unit (18), the main water inlet pipe (12) is connected to several branch pipes, and the branch pipes are sequentially transversal above the corresponding filter units (18), and spray algae water towards the filter units (18). Said method comprises: an algae sucking pump drawing a water body contaminated with blue algae into a water inlet pipe, and then spraying same onto a filter cloth, the blue algae flowing down the filter cloth following water flows, and finally flowing into an algae collecting pool (7), a part of water flowing onto a back plate (11) through the filter cloth, and flowing out of a flow guiding pipe (10) at the bottom of the back plate (11) and flowing into a fresh water pool (8); and when the liquid level in the algae collecting pool (7) reaches a predetermined depth, a return pump (9) and the algae sucking pump inputting water containing the blue algae into the water inlet pipe at the same time.

Description

Cyanobacteria concentration device and continuous concentration method Technical field

The invention relates to a blue-green algae concentration device and a continuous concentration method, belonging to the technical field of blue-green algae polluted water treatment equipment.

Background technique

Due to the lack of competition and inhibition of other species in its ecosystem, cyanobacteria multiply and grow rapidly under suitable nutrition and temperature conditions, and form large areas of water blooms. When cyanobacteria bloom on a large scale, a large number of cyanobacteria accumulate and decompose, emitting an unbearable stench, which seriously pollutes the nearshore environment. In addition, cyanobacteria blooms also affect the safety of drinking water sources.

Most cyanobacteria have bubbles that can float on the water surface to effectively use the light energy of the water surface for photosynthesis. There are many control methods for high-density cyanobacteria floating on the surface of water bodies, which can be summarized into two categories: in-situ treatment and ex-situ treatment. Ex-situ treatment mainly uses mechanical methods to directly collect and transport cyanobacteria on the water surface to the treatment site for treatment. Because the concentration of cyanobacteria in the algae water is very low, the amount of algae water that needs to be treated is extremely large. One of the important technical links for the rapid removal of cyanobacteria blooms is to use a high-efficiency cyanobacteria concentration device to reduce the volume of the algae water to be treated and reduce the concentration of algae slurry.

Summary of the invention

In order to solve the above technical problems, the present invention provides a cyanobacteria concentration device and a continuous concentration method. The specific technical solutions are as follows:

The cyanobacteria concentration device is characterized in that it comprises a bracket, a lifting frame and a plurality of filter units are arranged in the bracket, the top of the filter unit is rotatably connected with the top rod of the bracket, and the bottom of the filter unit and the lifting frame are rotatable When the lifting frame moves upward, the inclination angle of the filter unit and the vertical plane becomes larger, and when the lifting frame moves downward, the inclination angle of the filter unit and the vertical plane becomes smaller;

One side of the filter unit is provided with a main water inlet pipe, and the main water inlet pipe is connected with a plurality of branch pipes, and the branch pipes are sequentially transverse to the upper side of the corresponding filter unit and spray algae water toward the filter unit.

Further, a vibration frame is provided around all the outside of the filter unit, the vibration frame is fixedly connected to both sides of each filter unit, and the vibration frame is fixed with a vibrator.

Further, a reversing wheel is provided on one side of the lifting frame, an electric or manual hoist is provided on the top of the bracket opposite to the reversing wheel, the cable of the hoist bypasses the reversing wheel, and the hoist passes through the retractable cable , Raise or lower the lifting frame, and then adjust the angle between the filter unit and the vertical surface.

Further, the filter unit includes a filter cloth, a back plate, and a frame that is closed and connected end to end. The periphery of the filter cloth is tightly fixed to one side of the frame, and the back plate is closed and fixed on the other side of the frame.

The bottom of the frame or the side close to the bottom is provided with a water outlet, and a diversion tube is connected to the water outlet, and the diversion tube is curved downward in an arc after leading out of the frame.

Further, an air blowing system is also provided between the filter cloth and the back plate, and the air blowing system includes an air inlet pipe introduced from the side wall of the frame close to the top, the air inlet pipe crosses the frame, and the air inlet pipe faces the frame A plurality of circular holes are opened on one side of the lower end, and each circular hole is connected with a branch trachea. The branch trachea extend parallel to each other to the bottom near the frame. The end of each branch trachea is sealed as a blind end, and the branch trachea faces Multiple air outlets are provided on one side of the filter cloth.

Further, the top ends of the frame of each filter unit are fixed with upwardly extending connecting plates I, each connecting plate I is fixed to a tension spring I, the upper end of the tension spring I is fixed with the connecting plate II, and each connecting plate Ⅱ are connected with the upper frame of the filter unit installation frame by riveting, and the upper frame of the filter unit installation frame is fixed with the top rod of the bracket.

The bottom ends of the frame of each filter unit are fixed with connecting plates Ⅲ extending downward, the lower ends of each connecting plate Ⅲ are respectively fixed with tension springs II, the lower ends of the tension springs II are fixed with connecting plates IV, and each connecting plate Ⅳ is connected with the frame of the lifting frame by riveting.

Further, the main water inlet pipe is fixed with two uprights, the main water inlet pipe is parallel to the long top rod, both ends of the main water inlet pipe are closed, the side wall is provided with a water inlet, and the water inlet is fixedly connected to the water inlet pipe;

The main water inlet pipe is provided with a plurality of round holes along its length direction, and each round hole is connected with a drainage pipe. The drainage pipe extends to a position close to the top of the filter unit. The drainage pipe and the branch pipe are connected with each other and branch. The side of the tube facing the filter unit is provided with a plurality of water holes along its length direction.

Further, the frame is provided with a plurality of positioning plates for fixing the branch trachea. The positioning plate is transverse to the frame, and its two ends are fixed to the inner wall of the frame. The positioning plate is provided with a plurality of perforations, and each branch trachea is arranged in turn. Pass through the corresponding perforation.

Further, an algae collecting pond is arranged vertically below the filter unit, a clear water pool is surrounded on the periphery of the algae gathering pond, and the draft tube is suspended above the clear water pond, and both the operation and the clear water pond are provided with Drain pipe.

The method for continuous concentration of cyanobacteria, which is based on the above-mentioned cyanobacteria concentration device, and extends the water inlet pipe into the water body to be purified, and is connected to the algae suction pump. The algae collecting tank is provided with a reflux pump, and the pipe connected to the outlet of the reflux pump is connected to the main Inlet pipe, the concentration process is:

Step 1: Turn on the algae suction pump: the algae suction pump sucks the water contaminated by the cyanobacteria into the water inlet pipe, and finally sprays it on the filter cloth. The cyanobacteria flow down the filter cloth following the water flow, and finally flow into the algae collecting pond, part of the water is permeable The filter cloth flows to the back plate, and finally flows out from the diversion tube at the bottom of the back plate, and flows into the clean water tank. The clean water tank can be opened with a discharge port to discharge the clean water;

Step 2: Turn on the reflux pump: When the liquid level in the algae collection tank reaches a predetermined depth, start the reflux pump. The reflux pump and the algae suction pump simultaneously input water containing cyanobacteria into the inlet pipe, and the flow control range of the reflux pump and the algae suction pump for:

V _input = Q _suction * t ₁ * R ₁ + Q _back * t ₂ * R ₂

V _out = Q * t _{2 Press}

In the formula: Q _suction -algae suction pump flow rate, in m ³ /h, Q _back -return pump flow rate, unit m ³ /h, V _in -the amount of algae slurry entering the algae slurry pond, in m ³ , V _out -The amount of algae slurry pumped out of the algae slurry pond, the unit is m ³ , t ₁ -the operation time of the algae suction pump, the unit is h, t ₂ -the return pump operation time, the unit is h, R ₁ -the primary filtration concentration ratio, R ₂ -Secondary filtration concentration ratio, V-Algae slurry tank volume, unit is m ³ ,

In order to enable the system to operate stably and continuously for a long time, the reflux pump should not be sucked by air. It should be ensured that V _in ≥ V _out , and the _{range of t 1} : t ₂ is obtained. At the same time, depending on the actual volume of the algae pool V, the algae slurry pool cannot overflow. Ensure that V _in- V _out ≤ V.

The working principle of the present invention is:

When the present invention is actually used, a water inlet pipe is arranged above the filter cloth, and the water inlet pipe spans the filter cloth and is evenly provided with water outlet holes. The water body contaminated by cyanobacteria is pumped to the water inlet pipe, and the water body is sprayed from the water outlet holes On the filter cloth, the water penetrates the filter cloth, flows to the back of the filter cloth or drips onto the back plate, flows downstream to the sump under the action of gravity, and drains out from the guide pipes at both ends of the sump, and on the filter cloth The water body containing cyanobacteria slides down from the filter cloth, and a pool for collecting cyanobacteria water is set directly under the filter cloth to collect the water containing cyanobacteria, and then the cyanobacteria are concentrated and the clean water is separated out.

In the process of concentrating cyanobacteria, the vibrator is always in a vibrating state, which drives the filter cloth to vibrate synchronously, and prevents the cyanobacteria or sundries in the water body from clogging the filter holes on the filter cloth.

According to the pollution degree of different water bodies, the present invention comprehensively considers the degree of sundries in the water body, and calculates the appropriate inclination angle of the filter unit to achieve effective filtering and prevent clogging. The content of cyanobacteria in water bodies is extremely small. Even in water bodies with serious blooms, the content of cyanobacteria is usually a few thousandths. During the filtration process, the water and cyanobacteria will quickly flow down from the filter cloth, and part of the water penetrates the filter cloth and enters On the back panel, it enters the clean water pool, so the water body needs to be filtered through multiple cycles to achieve the concentration effect and enter the subsequent drying and other procedures.

In the present invention, an air blowing system is set on the back of the filter cloth, and by blowing air towards the filter cloth at a short distance, during the cleaning process of the device, each mesh of the filter cloth can be blown through, and the filter cloth can be washed with water. clean.

The beneficial effects of the present invention are:

In the application of the present invention, the amount of cyanobacteria in water is large, and the content of cyanobacteria in a unit of water is small. It needs to be filtered multiple times to achieve a good expected concentration effect. In order to increase the amount of filtered water per unit time, there are usually many devices of the present invention. Simultaneous use, multiple parallel settings, each device of the present invention is connected to a water inlet pipe, the present invention cleverly realizes multiple simultaneous use by setting the back plate, and there will be no interaction between the water bodies. The filter units work independently, and the concentrated algae water body and the filtered clean water will not drip onto other filter units until they are discharged.

In the present invention, a diversion tube is independently arranged under each back plate to divert the filtered clean water to a suitable collection position and separate it from the water body of the water tank.

The invention effectively prevents debris or blue algae from getting stuck on the filter cloth or frame through the vibration filter unit. During the vibration process, the filter hole of the filter cloth is prevented from being sealed by water, and the water passing through the filter hole is accelerated to enhance the filtering effect.

The inclination angle of the filter unit of the present invention is adjustable, and the suspended bottom of the filter unit is raised by manual or electric hoist to realize the adjustment of the angle of the filter unit, which is convenient to be applied to more different degrees of water filtration.

Through the air blowing system, the invention realizes the effect of overall cleaning without disassembly. After multiple filter units are installed in a group, the disassembly workload is very large, and the distance between adjacent filter units is small. The distance only needs to allow the water inlet pipe to be placed on the filter cloth, in order to reduce the overall equipment occupation Space, and easy to reduce the floor area, collect cyanobacteria water body and clean water, it is extremely unfeasible to insert the scrubbing equipment into the filter cloth for scrubbing and cleaning. Through the very thin air inlet pipe and branch air pipe, the occupied distance is extremely small. The filter mesh can be opened by blowing air, and the branch air pipes can be distributed flexibly, and can be laid to cover all corners of the filter cloth without cleaning dead corners. In terms of cost, air does not need to be costly, and only needs to be pumped. The energy consumption of pumped air is also very low. It is a low-carbon, environmentally friendly, and effective cleaning method that is worthy of promotion.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the present invention,

Figure 2 is a partial enlarged view of A in Figure 1,

Figure 3 is a partial enlarged view of B in Figure 1,

Figure 4 is a schematic diagram of the structure of the filter unit of the present invention,

Figure 5 is a schematic diagram of the lower part of Figure 4,

Reference signs: 1—bracket, 1-1—long top rod, 1-2—short top rod, 1-3—post, 2—hoist, 3—cable, 4—reversing wheel, 5—discharge pipe, 6—lifting frame, 7—algae collection pond, 8—clear water tank, 9—reflux pump, 10—draft pipe, 11—back plate, 12—main inlet pipe, 13—draft tube, 14—tension spring, 15— Connecting plate, 16—upper frame of filter unit installation frame, 17—filter unit installation frame, 18—filter unit, 19—frame of filter unit, 20—vibrator, 21—vibration frame, 22—branch air pipe, 23—outlet Air hole, 24—positioning plate, 25—sump, 26—hollow pipe, 27—intake pipe, 28—three-way casing, 29—back plate.

Detailed ways

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, which merely illustrate the basic structure of the present invention in a schematic manner, so they only show the constitutions related to the present invention.

As shown in Figure 1-3, this angle-adjustable vibrating cyanobacteria concentration device can be divided into brackets, filter units, lifting systems, vibration systems, water inlet systems, blowing systems, algae pools and clean water tanks.

The following only one illustrated embodiment structure introduces each system in turn:

The bracket 1 has a rectangular parallelepiped frame structure as a whole. The bracket 1 includes four uprights 1-3. The bottom of the uprights 1-3 is provided with a floor that fits the ground. When in actual use, it is fixed by the floor and the ground or other contact surfaces. , Make the whole stand 1 stand stable. The tops of the uprights 1-3 are connected end to end in sequence by the top rods. The top rods form a rectangular shape. The long top rod is called the long top rod 1-1, and the short top rod is called the short top rod 1-2. . A clean water tank 8 is set at the position of the column 1-3 close to the ground. The clean water tank 8 includes a round baffle and a bottom plate. The baffles at both ends of the short side are fixed to the inside of the corresponding end of the column 1-3. The length of the baffle is It can be the same length as the short side, or longer than the length of the short side. The baffle parallel to the long side can be located outside the column 1-3. The width of the formed clear pool 8 is greater than the width of the bracket 1, and the bottom plate is fixed at the bottom of the baffle. , Forming a clear pool with an open top 8. An algae collecting pond 7 is divided into the clearing pool 8 and one of the short sides is shared with the baffle of the clearing pond 8. Three baffles are used to form an algae gathering pond 7 whose width and length are both smaller than that of the clearing pond 8. , Is located on the center line of the length direction of the clear pool 8. In order to facilitate drainage, more than two holes are opened in the public baffle, at least one hole is connected to the clearing pool 8, one hole is connected to the algae pool 7, and a discharge pipe 5 is connected to the holes.

The filter unit 18 is arranged inside the bracket 1. In order to increase the amount of filtered water, a plurality of parallel and equidistantly distributed filter units 18 are arranged in the bracket 1. The filter unit 18 includes a rectangular filter unit frame 19, and is tightly fixed to the frame For the filter cloth in 19, a back plate 11 is arranged under the filter cloth. A space is reserved between the back plate 11 and the filter cloth. The periphery of the back plate 11 is bent toward the frame and fixed with the frame. The bottom sides of the back plate 11 There is a water outlet, and a downwardly curved guide tube 10 is connected to the water outlet. The water outlet of the guide tube 10 is located vertically above the clear pool 8, and the algae pool 7 is located vertically below the filter unit 18.

A plurality of filter units 18 are first installed and fixed in a filter unit mounting frame 17 connected by corner riveting. The four corners of the frame 21 of the filter unit are respectively fixed with connecting plates 15 which are hooked on the tension spring 14 and the tension spring 14 It is connected to the upper frame 16 and the lower frame of the filter unit mounting frame, and the connection method is that the upper frame and the lower frame of the filter unit mounting frame 17 are respectively fixed with a number of connecting plates 15 equal to the number of filter units 18 and distributed equidistantly, Each connecting plate 15 is hooked on a tension spring 14 of the filter unit 18, so as to realize that the four corners of the filter unit 18 are respectively suspended by the tension spring 14 to bring room for vibration to the vibration of the filter unit 18. Finally, the upper frame of the rectangular parallelepiped frame with the filter unit 18 installed is fixed to the upper top rod of the bracket 1, and the bottom is suspended.

The vibration system includes a vibration frame 21 and a vibrator 20. The vibration frame 21 surrounds all the filter units 18. A set of opposite sides of the vibration frame 21 spans the borders of all the filter units 18 and passes through bolts and each filter unit 18 in turn. The frame of the vibrating frame 21 is fixedly connected, and one or both sides of the other set of opposite sides of the vibrating frame 21 are provided with a vibrator 20. After the power cord plug of the vibrator 20 is connected to the power socket, the vibrator 20 can be started to work, the vibrator 20 vibrates, and the vibration frame 21 drives all the filter units 18 to vibrate synchronously. When the filter unit 18 filters the water containing cyanobacteria, the filter unit 18 vibrates, which can speed up the penetration of the water from the filter cloth to the bottom of the filter cloth. At the same time, it also prevents the cyanobacteria or other impurities in the water from clogging the filter cloth, preventing the cyanobacteria or impurities from hooking or hanging Attached to the filter cloth.

The lifting system is a manual or electric hoist 2 installed on the short top rod 1-2 of the bracket 1. A reversing wheel 4 is installed on the short side of the suspended end of the rectangular parallelepiped frame where the filter unit 18 is installed, and the manual or electric hoist 2 is pulled The cable 3 bypasses the reversing wheel 4, and the hoist 2 raises or lowers the lifting frame 6 by retracting the cable 3, thereby adjusting the angle between the filter unit 18 and the vertical surface.

The water inlet system includes a main water inlet pipe 12 and a branch pipe. The main water inlet pipe 12 is fixed with two uprights 1-3. The main water inlet pipe 12 is parallel to the long top rod 1-1. Both ends of the main water inlet pipe 12 are closed. A water inlet is provided, and the water inlet is fixedly connected to the water inlet pipe; the main water inlet pipe 12 is provided with a plurality of circular holes along its length, and each circular hole is connected with a drainage tube 13 through which the drainage tube 13 extends to the top of the filter unit 18 The drainage tube 13 is connected to the branch tube through and abutted, and the side of the branch tube facing the filter unit 18 is provided with a plurality of water holes along its length direction. The contaminated water is pumped toward the inlet pipe by the water pump, and the water is sprayed from the water hole toward the corresponding filter unit 18, and the water is sent to the surface of the filter unit 18, and then filtered, concentrated and separated.

In combination with Figures 4 and 5, in order to clearly show the air blowing system, the filter cloth is omitted to prevent the air blowing system from being blocked. The periphery of the filter cloth is tightly fixed to the side of the frame 19, and the back plate 29 is closed and fixed on the frame 19 On the other hand, the air blowing system is arranged between the filter cloth and the back plate 29. The frame 19 has a certain thickness, and the thickness is greater than the outer diameter of the air inlet pipe 27, so that the air inlet pipe 27 can pass through the side wall of the frame 19 and be inserted into the frame 19, and the air inlet pipe does not contact the filter cloth and the back plate 29.

The frame 19 is in a rectangular shape. When in use, the long side of the frame 19 and the vertical surface are inclined at an acute angle. A frame rod at the bottom of the frame 19 is a hollow tube 26, and the hollow tube 26 is opened with a set toward the side of the frame. The length of the water tank 25 and the hollow tube 26 is greater than the width of the frame 19, both ends of which are located outside the frame 19, and the drainage tube 13 is connected to the two ends of the hollow tube 26. When the water on the filter cloth flows to the backboard 29, it flows downstream to the water collection tank 25, and then flows out from the drainage tube 10. A clean water pool 8 can be set under the drainage tube 10, or a water pipe can be used to divert the clean water. To other places.

The air blowing system includes an air intake pipe 27 introduced from the side wall near the top of the frame 19, the air intake pipe 27 spans the frame 19, and the side of the air intake pipe 27 facing the lower end of the frame 19 is provided with a plurality of circular holes, and each circular hole is The branch air pipe 22 is connected with the branch air pipe 22 and the long side of the frame 19 is parallel. The air inlet pipe 27 and the branch air pipe 22 are expanded and sleeved on the outside of the air inlet pipe 27 and the branch air pipe 22 through the three-way sleeve 28 to achieve a fixed connection. The branch air pipes 22 extend parallel to each other to be close to the water collecting tank 25, the end of each branch air pipe 22 is sealed as a blind end, and the branch air pipe 22 is provided with a plurality of air outlet holes 23 facing the filter cloth. The gas inlet pipe 27 is connected to the gas pump, and the gas is pumped into the gas inlet pipe 27 through the gas pump, blown out from the outlet hole 23, and blown to the filter cloth at a fast speed to blow through all the filter holes of the filter cloth.

In order to further improve the relative stability of the branch air pipe 22 in the frame 19 so as not to contact the filter cloth and the back plate 29, at least one positioning plate 24 for fixing the branch air pipe 22 is provided in the frame 19, and the positioning plate 24 is transverse to In the frame 19, both ends of the frame 19 are fixed to the inner wall of the frame 19, and the positioning plate 24 is provided with a plurality of perforations, and each branch air pipe 22 passes through the corresponding perforation in turn.

A positioning plate 24 is provided at the junction of the air intake pipe 27 and the branch air pipe 22. The air intake pipe 27 is located above the positioning plate 24. Each branch air pipe 22 passes through the perforation on the positioning plate 24 and is close to the blind end of the branch air pipe 22. A positioning plate 24 is provided, and each branch air pipe 22 passes through a corresponding perforation of the positioning plate 24. According to the length of the frame 19, more than one positioning plate 24 can be provided in the middle of the branch air pipe 22. In order to drag the branch trachea 22 under the branch trachea 22 and prevent it from bending and deforming towards the back plate 29 under the action of gravity, the cross section of the positioning plate 24 is L-shaped, and the branch trachea 22 passes vertically through one side of the positioning plate 24 Perforated, the other side of the positioning plate 24 faces the back plate 29.

The installation method of the angle-adjustable vibration type cyanobacteria concentration device includes the following steps:

Step 1: Preparation of the bracket: select 4 uprights, 2 long top rods, 2 short top rods, 2 long top rods and 2 short top rods connected in sequence to form a rectangular frame. The rectangular frame is set at 4 On the top of the column, the column is fixed to the 4 corners in turn;

Step 2: Install the algae collecting pond and the clearing pond: stand the columns on the ground, and set a rectangular clearing pond between the columns. The clearing pond is fixed to the 4 columns, and the two sides of the length direction are respectively fixed to the corresponding columns. Three partitions are vertically fixed inside the clean water tank, two partitions are parallel to the length of the clean water tank, one end of the partition is fixed to the short side of the clean water tank, and the other end is fixed by a partition, 3 partitions It forms a rectangular algae pool with one side of the clear pool;

Step 3: Assemble the filter unit: fix the filter cloth on the frame, open a water outlet on one side of the back plate, and install a diversion tube at the water outlet;

Step 4: Install the filter unit: select two connecting rods and the lifting frame, and the two are connected by two short rods to form a rectangular shape. The specifications of the rectangle are the same as the lifting frame, and the rectangle and the lifting frame are connected through 4 transition rods. Connect to form a rectangular cube frame, install tension springs on the four corners of the filter unit assembled in step 3, and place the filter unit in the rectangular cube frame. The tension springs are connected to the corresponding connecting rods and the lifting frame through the connecting block. Riveting, install a number of parallel filter units in sequence, the filter unit is parallel to one side of the rectangular cube frame, and the guide pipes of the filter unit face the same direction;

Step 5: Install the vibrator: fix the vibrating frame in the middle of the transition rod, the vibrating frame is fixed to both sides of each filter unit, and install the vibrator at both ends or one end of the vibrating frame;

Step 6: Install the hoist: install and fix the two connecting rods of the filter unit installed in step 5 with the long top rod of the bracket in turn, the lifting frame is suspended, and a reversing wheel is installed on the short side of the lifting frame, and on the reversing wheel Install an electric or manual hoist on the short top rod of the bracket on the corresponding side, and the cable of the hoist bypasses the reversing wheel;

Step 7: Install the water inlet system: install the main water inlet pipe on one side of the length of the bracket, the main water inlet pipe is fixed with two uprights, the two ends of the main water inlet pipe are closed, and there is a water inlet near the side wall of one end, and the water inlet is connected The inlet pipe, the main inlet pipe is connected to a drainage pipe at each filter unit position, the drainage pipe extends to the height of the filter unit, and connects to a branch pipe horizontally across the filter unit. The branch pipe has a water outlet hole. The side faces the filter cloth.

The method for continuous concentration of cyanobacteria. The method is based on the above-mentioned cyanobacteria concentration device, and extends the inlet pipe into the water body and connects the algae suction pump. The algae collecting tank is provided with a reflux pump 9, and the pipe connected to the outlet of the reflux pump 9 is connected to the main The inlet pipe includes the following steps:

Step 1: Turn on the algae suction pump: the algae suction pump sucks the water contaminated by the cyanobacteria into the water inlet pipe, and finally sprays it on the filter cloth. The cyanobacteria flow down the filter cloth following the water flow, and finally flow into the algae collecting pond, part of the water is permeable The filter cloth flows to the back plate, and finally flows out from the diversion tube at the bottom of the back plate, and flows into the clean water tank. The clean water tank can be opened with a discharge port to discharge the clean water;

Step 2: Turn on the reflux pump 9: When the liquid level in the algae pool reaches a predetermined depth, start the reflux pump, the reflux pump and the algae suction pump simultaneously input water containing cyanobacteria into the inlet pipe, and the flow control of the reflux pump and the algae suction pump The range is:

V _input = Q _suction * t ₁ * R ₁ + Q _back * t ₂ * R ₂

V _out = Q * t _{2 Press}

In the formula: Q _suction -algae suction pump flow rate, in m ³ /h, Q _back -return pump flow rate, unit m ³ /h, V _in -the amount of algae slurry entering the algae slurry pond, in m ³ , V _out -The amount of algae slurry pumped out of the algae slurry pond, the unit is m ³ , t ₁ -the operation time of the algae suction pump, the unit is h, t ₂ -the return pump operation time, the unit is h, R ₁ -the primary filtration concentration ratio, R ₂ -Secondary filtration concentration ratio, V-Algae slurry tank volume, unit is m ³ ,

In order to enable the system to operate stably and continuously for a long time, the reflux pump should not be sucked by air. It should be ensured that V _in ≥ V _out , and the _{range of t 1} : t ₂ is obtained. At the same time, depending on the actual volume of the algae pool V, the algae slurry pool cannot overflow. Ensure that V _in- V _out ≤ V.

An actual running example is given below:

Take the device algae suction pump flow rate 70m ³ /h, reflux pump flow rate 12m ³ /h, primary filtration concentration ratio 10:1, secondary reflux concentration ratio 10:1, operating angle 55° as an example, the device primary filtration continuous operation for 8 hours , The algae slurry pond needs to be larger than 56m ³ , and then the reflux pump should be used for secondary reflux filtration. It takes 4.67 hours to operate. Considering the economy, continuity and time-saving in actual use, the combined operation circulation reflux operation mode is sufficient. Realize the setting of a smaller algae slurry pond and a shorter running time to achieve the desired effect.

In order to enable the system to operate stably and continuously for a long period of time, the reflux pump should not be sucked by air. It should be ensured that V _in ≥ V _out , and t ₁ :t ₂ ≥108:70. At the same time, depending on the actual volume of the algae slurry tank V, the algae slurry tank cannot overflow , It is necessary to ensure that V _in- V _out ≤ V.

For example, the capacity of the algae slurry tank is 4m ³ , the algae suction pump runs for 1 hour, the reflux pump runs for 0.6 hours, and the continuous working time of the device is calculated as 7 hours. The amount of algae slurry in the algae slurry tank is 3.64m ³ , which satisfies the function of the device. The reflux pump of the device is controlled by a time controller. The algae suction pump runs continuously. When the device is started, the algae suction pump is turned on for 0.4 hours, and then the reflux pump is automatically started. After the reflux pump runs for 0.6 hours, it stops automatically; the algae suction pump continues to run for 0.4 hours , The reflux pump automatically starts again, and stops automatically after 0.6 hours of operation, so that the reciprocating cycle for 7 hours can realize the continuous and stable operation of the device. After the device is stopped, turn on the vibrator and the reflux pump separately for 20 minutes to concentrate the algae slurry in the algae slurry pool again. The final amount of algae slurry is 0.36m ^3. At this time, the total algae water volume of the combined operation of the device is 490m ³ , and the total concentration ratio is Is 1346.2.

Pump the algae slurry out of the algae slurry pool, close the algae suction port of the algae suction pump, open the cleaning port, start the algae suction pump, blower and vibrator to clean the filter element of the device to ensure that the filter element is not blocked and the device operates stably for a long time .

Taking the above-mentioned ideal embodiment according to the present invention as enlightenment, through the above-mentioned description content, relevant staff can make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the content of the description, and its technical scope must be determined according to the scope of the claims.

Claims (10)

1. The cyanobacteria concentration device is characterized in that it comprises a bracket, a lifting frame and a plurality of filter units are arranged in the bracket, the top of the filter unit is rotatably connected with the top rod of the bracket, and the bottom of the filter unit and the lifting frame are rotatable When the lifting frame moves upward, the inclination angle of the filter unit and the vertical plane becomes larger, and when the lifting frame moves downward, the inclination angle of the filter unit and the vertical plane becomes smaller;

   One side of the filter unit is provided with a main water inlet pipe, and the main water inlet pipe is connected with a plurality of branch pipes, and the branch pipes are sequentially transverse to the upper side of the corresponding filter unit and spray algae water toward the filter unit.
2. The cyanobacteria concentration device according to claim 1, wherein a vibration frame is arranged around all the filter units, and the vibration frame is fixedly connected to both sides of each filter unit, and the vibration frame is fixed with a vibrator .
3. The vibrating cyanobacteria concentration device according to claim 1, characterized in that: one side of the lifting frame is provided with a reversing wheel, and the top of the bracket opposite to the reversing wheel is provided with an electric or manual gourd. The cable bypasses the reversing wheel, and the hoist raises or lowers the lifting frame by retracting and retracting the cable, thereby adjusting the angle between the filter unit and the vertical surface.
4. The cyanobacteria concentration device according to claim 1, characterized in that: the filter unit comprises a filter cloth, a back plate and a frame that is closed and connected end-to-end, and the periphery of the filter cloth is tightly fixed to one side of the frame, and the back plate Closed and fixed on the other side of the frame,

   The bottom of the frame or the side close to the bottom is provided with a water outlet, and a diversion tube is connected to the water outlet, and the diversion tube is curved downward in an arc after leading out of the frame.
5. The cyanobacteria concentration device according to claim 1, wherein an air blowing system is also provided between the filter cloth and the back plate, and the air blowing system includes an air inlet pipe introduced from a side wall near the top of the frame, so The air inlet pipe crosses the frame, and the side of the air inlet pipe facing the lower end of the frame is provided with a plurality of circular holes. Each circular hole is connected with a branch air pipe, and the branch air pipes extend parallel to each other to the bottom of the frame. The ends are all sealed as blind ends, and the branch air pipes are provided with a plurality of air outlets on the side facing the filter cloth.
6. The cyanobacteria concentration device according to claim 1, characterized in that: the top ends of the frame of each filter unit are fixed with connecting plates I extending upward, and each connecting plate I is fixed to a tension spring I, the tension spring The upper end of Ⅰ is fixed with connecting plate Ⅱ. Each connecting plate Ⅱ is riveted and connected with the upper frame of the filter unit mounting frame. The upper frame of the filter unit mounting frame is fixed with the top rod of the bracket.

   The bottom ends of the frame of each filter unit are fixed with connecting plates Ⅲ extending downward, the lower ends of each connecting plate Ⅲ are respectively fixed with tension springs II, the lower ends of the tension springs II are fixed with connecting plates IV, and each connecting plate Ⅳ is connected with the frame of the lifting frame by riveting.
7. The cyanobacteria concentration device according to claim 1, characterized in that: the main water inlet pipe is fixed with two uprights, the main water inlet pipe is parallel to the long top rod, both ends of the main water inlet pipe are closed, and the side wall is provided with water inlets. , The water inlet is fixedly connected to the water inlet pipe;

   The main water inlet pipe is provided with a plurality of round holes along its length direction, and each round hole is connected with a drainage pipe. The drainage pipe extends to a position close to the top of the filter unit. The drainage pipe and the branch pipe are connected with each other and branch. The side of the tube facing the filter unit is provided with a plurality of water holes along its length direction.
8. The cyanobacteria concentration device according to claim 1, wherein a plurality of positioning plates for fixing the branch trachea are arranged in the frame, and the positioning plates are transverse to the frame, and both ends of the positioning plate are fixed to the inner wall of the frame. The plate is provided with a plurality of perforations, and each branch trachea passes through the corresponding perforation in turn.
9. The cyanobacteria concentration device according to claim 1, characterized in that: an algae collecting pond is arranged vertically below the filter unit, and a clean water pool is surrounded by the outer periphery of the algae collecting pond, and the guide tube is suspended in the clear water pond. Above, the operation and clean water tanks are all equipped with discharge pipes.
10. The method for continuous concentration of cyanobacteria, characterized in that: the method is based on the cyanobacteria concentration device of any one of claims 1-9, and the water inlet pipe is extended into the water body to be purified, and connected to the algae suction pump, and the algae collecting pool is provided with a reflux pump , The pipe connected to the outlet of the reflux pump is connected to the main water inlet pipe, and the concentration process is:

    Step 1: Turn on the algae suction pump: the algae suction pump sucks the water contaminated by the cyanobacteria into the water inlet pipe, and finally sprays it on the filter cloth. The cyanobacteria flow down the filter cloth following the water flow, and finally flow into the algae collecting pond, part of the water is permeable The filter cloth flows to the back plate, and finally flows out from the diversion tube at the bottom of the back plate, and flows into the clean water tank. The clean water tank can be opened with a discharge port to discharge the clean water;

    Step 2: Turn on the reflux pump: When the liquid level in the algae collection tank reaches a predetermined depth, start the reflux pump. The reflux pump and the algae suction pump simultaneously input water containing cyanobacteria into the inlet pipe, and the flow control range of the reflux pump and the algae suction pump for:

    V _input = Q _suction * t ₁ * R ₁ + Q _back * t ₂ * R ₂

    V _out = Q * t _{2 Press}

    In the formula: Q _suction -algae suction pump flow rate, in m ³ /h, Q _back -return pump flow rate, unit m ³ /h, V _in -the amount of algae slurry entering the algae slurry pond, in m ³ , V _out -The amount of algae slurry pumped out of the algae slurry pond, the unit is m ³ , t ₁ -the operation time of the algae suction pump, the unit is h, t ₂ -the return pump operation time, the unit is h, R ₁ -the primary filtration concentration ratio, R ₂ -Secondary filtration concentration ratio, V-Algae slurry tank volume, unit is m ³ ,

    In order to enable the system to operate stably and continuously for a long time, the reflux pump should not be sucked by air. It should be ensured that V _in ≥ V _out , and the _{range of t 1} : t ₂ is obtained. At the same time, depending on the actual volume of the algae pool V, the algae slurry pool cannot overflow. Ensure that V _in- V _out ≤ V.

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