CN101766142A - Method and filtering system for removing solid suspended particles from aquaculture system - Google Patents
Method and filtering system for removing solid suspended particles from aquaculture system Download PDFInfo
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- CN101766142A CN101766142A CN200910196851A CN200910196851A CN101766142A CN 101766142 A CN101766142 A CN 101766142A CN 200910196851 A CN200910196851 A CN 200910196851A CN 200910196851 A CN200910196851 A CN 200910196851A CN 101766142 A CN101766142 A CN 101766142A
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Abstract
The invention provides a method and a filtering system for removing solid suspended particles from an aquaculture system. The method comprises the following steps of: continuously injecting aquaculture waste water which contains the solid suspended particles into a filter rotor drum of a micro-filter from a water inlet pipe; discharging the waste water from a drain pipe after being filtered by a filter screen of the filter rotor drum; intermittently driving the filter rotor drum to rotate while starting a back washing device to wash the filter screen so as to wash away the particles on the filter; and stopping the rotation of the filter rotor drum and the washing of the back washing device after finishing washing. The filter system comprises the micro-filter and an automatic power supply control device, wherein the micro-filter comprises a cover, a box, a center support shaft, the filter rotor drum, the back washing device, a back washing water pump, a dust collecting funnel, a motor, a transmission device, the water inlet pipe and the drain pipe. The filter rotor drum and the back washing device are intermittently started and the filter screen is back washed so the energy consumption of the micro-filter can be effectively decreased and the filtering effect is improved.
Description
Technical field
The present invention relates to the aquaculture water treatment field, relate in particular to a kind of be used for filtering removal aquaculture system solid suspended particles (Suspended solids, method SS) and used filtration system.
Background technology
Often have many solid suspended particles in the aquaculture system, the particle of these solids is mainly rolled into a ball three parts by fish excrement, residual bait and bacterium living beings and is formed, and main source is a feed.The removal effect of solid suspended particles directly has influence on many important factors such as fish growth, biological cleaning effect, system configuration and operating cost in the aquaculture system.
Rotary drum Microfilter (Micro screen drum filter) is present the most widely used coarse filtration device, nowadays also is applied to the removal technology of solid suspended particles in the aquaculture system.Chinese patent application 02158869.4 discloses a kind of Microfilter that is used for the mariculture water treatment, it has the lauter tub of outer cover screen pack, this lauter tub links to each other with motor by rotating shaft, its top is provided with back purge system, this back purge system is made of backwash tube and the backwash nozzle that is installed on the backwash tube, establishes the backwash raceway groove in the lauter tub and links to each other with blow-off pipe.This Microfilter when circumference rotates, by lauter tub top direction back purge system inject high pressure water, is dashed from screen pack diffluence downstream the solid particulate matter that is bonded on the screen pack at lauter tub, overcomes the deficiency that screen pack stops up easily.
Yet the process of solid suspended particles is the continuous operations formulas in the general existing removal aquiculture waste water, that is to say that waste water passes through Microfilter continuously, and the perforate bowl of Microfilter gyrates simultaneously.Therefore, there is following technological deficiency in it: perforate bowl of Zhuan Donging and in running order all the time back purge system power consumption are quite huge all the time, have also shortened the working life of screen pack; In addition, the Microfilter perforate bowl is in rotation all the time, very easily cause the fragmentation of the bigger solid suspended particles (as fish excrement, residual bait etc.) in the aquaculture system, thereby produce a large amount of finely ground particles, these finely ground particles may pass screen pack and discharge along with flowing water, also may cram the screen pack mesh and are difficult to remove, and so just can have a strong impact on filter effect, also can increase simultaneously the frequency of backwash greatly, increase water consumption.Also increased the difficulty of subsequent treatment and biological treatment to a certain extent.
Summary of the invention
The purpose of this invention is to provide a kind of method of solid suspended particles in the aquaculture system and used filtration system removed, in order to solve existing Microfilter power consumption, big, the not good technical problem of filter effect of water consumption.
For achieving the above object, the invention provides a kind of method of removing solid suspended particles in the aquaculture system, it may further comprise the steps: the aquiculture waste water that will contain solid suspended particles enters into continuously from water inlet pipe in the perforate bowl of Microfilter, and waste water filters the back by the perforate bowl screen pack and discharges from drainpipe; Drive perforate bowl off and on and rotate, start back purge system simultaneously screen pack is washed, so that the particle on the screen pack is washed away, flushing stops the rotation of perforate bowl and the flushing of back purge system after finishing.
Further, the startup by automaton controlled filter rotary drum and back purge system.
Further, described automaton comprises the time relay or level sensor.
Further, driven the perforate bowl rotation every 15-30 minute and started back purge system once by time relay control, washing time is 30-40 second.
Further, rinse stage perforate bowl rotation 2.2-2.8 circle.
Further, the submergence of aquiculture waste water in the Microfilter casing remains on the 34-58% of perforate bowl diameter, described level sensor is located at box inside, and it highly is the 52-58% part of perforate bowl diameter height, when water level in the casing reached the height of level sensor, level sensor sent signal and starts perforate bowl and back purge system simultaneously.
Further, the screen pack mesh of described perforate bowl is 150 orders (mesh is 100 μ m)-200 orders (mesh is 70 μ m).
For achieving the above object, the present invention also provides a kind of filtration system of removing solid suspended particles in the aquaculture system, it comprises Microfilter and automaton, described Microfilter comprises cover, casing, central support shaft, perforate bowl, back purge system, backwash pump, dirt collecting bucket, motor, transmission device, water inlet pipe and drainpipe, described central support shaft is hollow and is fixed in the casing, described perforate bowl and central support shaft are rotationally connected, and one or more pieces screen packs are equipped with on the perforate bowl surface, described dirt collecting bucket opening upwards is located at perforate bowl inside and is installed on the described central support shaft, and the dirt collecting bucket bottom communicates with central support shaft, described back purge system is installed in the position of described cover or box inside and corresponding described dirt collecting bucket opening, described backwash pump is connected with back purge system, described transmission device connects perforate bowl and motor, and described water inlet pipe and drainpipe are located on the casing; Described automaton is connected with motor with backwash pump.
Further, described automaton comprises the time relay or level sensor.
Further, described level sensor is located at box inside, and it highly is the 52-58% part of perforate bowl diameter height.
Further, the screen pack mesh of described perforate bowl is 150 orders (mesh is 100 μ m)-200 orders (mesh is 70 μ m).
Further, the screen pack mesh of described perforate bowl is 170 orders (mesh is 90 μ m).
Further, described screen pack is loaded on the outer surface of perforate bowl.
Further, described perforate bowl is rotationally connected by two sliding bearings and central support shaft.
Further, described back purge system comprises several shower nozzles on backwash tube and the backwash tube.
Further, the both sides of described dirt collecting bucket opening are near the both sides of perforate bowl, in the corresponding dirt collecting bucket opening scope of the position of described several shower nozzles.
Further, described transmission device comprises reductor and gear train, and perforate bowl, gear train, reductor and motor are connected successively.
Further, described reductor is a cycloidal planetary gear speed reducer.
Perforate bowl of the present invention and back purge system are to remain static under main filtration time, and employing intermittently starts perforate bowl and back purge system, screen pack is carried out backwash, after finishing, backwash stops the rotation of perforate bowl and the running of back purge system immediately, like this, can effectively reduce the energy consumption of Microfilter, prolong the life-span of screen pack; Also can effectively avoid the phenomenon of the finely ground particles that bigger solid particle is difficult to remove owing to the perforate bowl that rotates all the time causes fragmentation to produce, thereby improve the effect of filtering.
Description of drawings
For can clearer understanding purpose of the present invention, characteristics and advantage, below with reference to accompanying drawing preferred embodiment of the present invention is described in detail, wherein:
Fig. 1 is the structural representation of Microfilter in one embodiment of the invention;
Fig. 2 is the control principle block diagram of filtration system in one embodiment of the invention;
Fig. 3 is the filter screen order number of traditional Microfilter and Microfilter of the present invention and the graph of a relation of total suspended matter clearance;
Fig. 4 is the filter screen order number of traditional Microfilter and Microfilter of the present invention and the graph of a relation of power consumption; And
Fig. 5 is the filter screen order number of traditional Microfilter and Microfilter of the present invention and the graph of a relation of water consumption.
Embodiment
In the present embodiment, the filtration system of solid suspended particles comprises Microfilter and automaton in the removal aquaculture system.Fig. 1 is the structural representation of present embodiment Microfilter, this Microfilter comprises cover 1, casing 2, central support shaft 3, perforate bowl 4, backwash tube 51, shower nozzle 52, backwash pump (not shown), dirt collecting bucket 6, the time relay (not shown), motor (not shown), cycloidal planetary gear speed reducer 71, gear train 72, water inlet pipe 81 and drainpipe 82, and main material is a stainless steel.Central support shaft 3 is the non-rotatable member of hollow, it is fixed in the casing 2, perforate bowl 4 is rotationally connected by 2 sliding bearings and central support shaft 3, can make perforate bowl 4 is that rotate at the center with the axis of central support shaft 3, and the outer surface of perforate bowl 4 is equipped with 3 screen packs, dirt collecting bucket 6 openings upwards are located at perforate bowl 4 inside and are installed on the central support shaft 3, and dirt collecting bucket 6 bottoms communicate with central support shaft 3, backwash tube 51 is installed in the inboard also position of corresponding dirt collecting bucket opening of cover top, the both sides of dirt collecting bucket 6 openings are near the both sides of perforate bowl, this is the solid particulate matter that washes on the net for receiving filtration as far as possible on a large scale, several shower nozzles 52 are installed on the backwash tube 51 and evenly and distribute, in the scope of corresponding dirt collecting bucket 6 openings in the position of several shower nozzles 52, and the first two shower nozzles are near two limits of dirt collecting bucket 6, this is in order to be flushed to the screen pack of maximum magnitude, and don't as for solid particulate matter is washed outside the opening of dirt collecting bucket 6, get back to again in the perforate bowl 4, backwash tube 51 is connected with backwash pump, perforate bowl 4, gear train 72, cycloidal planetary gear speed reducer 71 and motor are connected successively, and water inlet pipe 81 is located on the casing 2 with drainpipe 82.The time relay (not shown) is electrically connected with backwash pump and motor as automaton.
The concrete grammar that the present invention removes solid suspended particles in the aquaculture system is: in the pending water that will contain solid suspended particles poured into perforate bowl 4 to the Microfilter casing 2 continuously from water inlet pipe 81, this moment, perforate bowl 4 remained static; Suspension in the pending water is filtered the screen pack inboard that is trapped in perforate bowl 4 surfaces, and the water after the filtration falls into casing 2, flows out from drainpipe 82; Setting by the time relay, every 15-30 minute, motor and backwash pump start simultaneously, perforate bowl 4 begins to rotate, rotating speed is 4 rev/mins, and shower nozzle 52 is injected in clear water on the outer surface of screen pack, and the impurity such as solid particulate matter in the screen pack are flushed in the dirt collecting bucket 6, and the central support shaft by hollow 3 discharges the Microfilter systems, and the flushing process time is 30-40 second; Stop the rotation of perforate bowl 4 and the running of backwash pump after the flushing.
With per hour water treatment amount is that traditional Microfilter of 50 cubic metres is an example, and the perforate bowl power of motor is 0.18kW, and the backwashing water pump power is 0.55kW.Perforate bowl keeps rotation status always during work, and the power consumption of every day is 4.83kWh, and the power consumption of handling every cube of water is 4 * 10
-3KWh.With Microfilter of the present invention and filter method, per hour maximum backwashes 4 times, each time, the backwashing time of every day was 56 minutes so in 35 seconds, and the result is 0.51kWh for the power consumption of backwash every day, and the power consumption of handling every cube of water is 0.58 * 10
-3KWh, energy consumption is 14.5% of traditional Microfilter.Experimental result shows that Microfilter of the present invention and filter method can effectively reduce the energy consumption of Microfilter.
Consider when Microfilter of the present invention has just been started working, the screen pack wire side is cleaner, filter area is big, water logging there is not the degree of depth to reach (it is about 40% that the water logging of traditional Microfilter there is not the degree of depth) about 55% in the perforate bowl, filter area is about 53% of the screen pack gross area, at equal mesh size and net sheet area, under the situation that guarantees equal solid suspension treatment effect, filter capacity, be that water treatment capacity is more than 120% of traditional Microfilter, and backwash work this moment is controlled by the time relay, generally be set at 20-30 minute once, per hour backwash is 2-3 time.But, after the long-time use of Microfilter, accumulated certain impurity in the screen pack wire side, filter area reduces, and filter effect weakens, the water level rate of climb accelerates, if still carry out backwash, can not satisfy the demand that solid particulate matter is removed on the screen pack, therefore according to the setting of the time relay, casing 2 inboards at Microfilter of the present invention add a level sensor 9, and it highly is 65% of perforate bowl 4 diameter height.So, after the long-time use of Microfilter, the water levels in the perforate bowl 4 just rise to the height of level sensor 9 about 15 minutes generally speaking, level sensor 9 sends signal immediately, and while starter motor and backwash pump, carry out backwash, the backwash frequency of this moment is for per hour about 4 times.
Please in conjunction with consulting Fig. 2, Fig. 2 is the control principle block diagram of filtration system among above-mentioned Fig. 1 embodiment.The perforate bowl that waste water begins through Microfilter filters, and whether time relay start detection arrives backwash start-up time, if, then move rotary drum motor and backwash pump, if not, then do not carry out this operation, continue behind the certain hour to detect; Perhaps detect by fluid level controller whether water level reaches the backwash liquid level, i.e. the position of level sensor, if, then move rotary drum motor and backwash pump, if not, then do not carry out this operation; Backwashing time is controlled by the time relay, if arrive the backwash concluding time, then stops the rotary drum motor and closes backwash pump, finishes backwash; If not, continue backwash.
Certainly, among the present invention, also not service time relay, and use level sensor separately, water level has been higher than level sensor, carries out backwash operation.Also can reach the purpose of intermittent backwash, and also can guarantee identical technique effect.
When should be noted in the discussion above that backwash, perforate bowl is with rotation 2.2-2.8 circle, and promptly two circles about half are advisable.On the one hand, the effect and the filter effect of backwash had both been guaranteed; On the other hand, revolve the work wire side that has equaled to change screen pack after taking two turns partly, the working life that has prolonged screen pack.
As seen, filtration system of the present invention and filter method not only can effectively reduce power consumption, compared to the running of traditional filtering technology continous way, among the present invention when perforate bowl and back purge system the mode of stopping time running improved filter effect and water treatment amount on the contrary.
In addition, all are higher than turbine and worm decelerator used in traditional Microfilter in the transmission efficiency of the cycloidal planetary gear speed reducer that the present invention is used and service life, by the mode that adopts cycloidal planetary gear speed reducer and central support shaft to support, the power of driving motor significantly is reduced to 0.37kW by 1.1kW, has embodied excellent energy-saving and cost-reducing performance.
The screen pack of preferred 150 orders of Microfilter of the present invention (mesh is 100 μ m)-200 orders (mesh is 70 μ m) mesh, most preferably 170 orders (mesh is 90 μ m).In order to determine suitable mesh size, the applicant tests at different meshes.
Test 1:
Model machine: select the test of comparing of traditional rotary drum Microfilter and Microfilter of the present invention for use, the roller diameter and the length dimension of Microfilter are identical, and backwash pump is same water pump, and backwash shower nozzle quantity is identical.
Sampling: the pellet amount of throwing something and feeding every day is a fish body gross mass 2%, every day at the upper and lower noon each 1 time, and the back 1h sampling of throwing something and feeding, sample point is fishpond discharge water and water after treatment.
Assay method and data are handled: (1) TSS clearance is measured: at first adopt the middling speed quantitative filter paper, measure water inlet sample and total suspended matter (TSS) content that goes out water sample, press TSS clearance=(TSS then
Water inlet-TSS
Water outlet)/TSS
Water inlet* 100% calculates TSS in the formula
Water inletAnd TSS
Water outletBe respectively the TSS of Microfilter water-in and water-out.Take a sample respectively 9 times for every group during test.Get 3 water samples, 3 water samples are averaged and are calculated the TSS clearance then at every turn.Consider in the sampling to have inhomogeneities,,, remove a peak and a minimum, then 7 secondary data that stay are averaged 9 TSS clearances for the error in the elimination test.
(2) backwash number of times: the backwash number of times within each sampling back recording occurring continuously 6h, the meter of averaging is converted into inferior/d.
(3) power consumption: traditional Microfilter backwash pump default is each running 1min, Microfilter backwash pump default of the present invention is each the running for 35 seconds, calculate the backwash pump unit power consumption according to the backwash number of times, obtain the Microfilter power consumption of every day with the addition of main frame power consumption.The calculating of backwash pump power consumption is earlier to measure backwash pump with clamp meter to start to the electric current that stops, the unit power consumption of water pump when obtaining each backwash then.
(4) water consumption: the water consumption when measuring each backwash with flowmeter earlier, each water consumption be multiply by backwash every day number of times, obtain the Microfilter water consumption of every day then.
The result: the filtration mesh number of traditional Microfilter and Microfilter of the present invention and TSS clearance relation curve are seen Fig. 3, the filtration mesh number of tradition Microfilter and Microfilter of the present invention is seen Fig. 4 and Fig. 5 with power consumption and water consumption relation curve, and the relation that traditional Microfilter and Microfilter of the present invention different are filtered backwash number of times under the mesh numbers and power consumption and water consumption sees Table 1 and table 2.
Filtering mesh number (aperture) is the main factor that influences the TSS clearance.The order number of screen pack is big more, and the aperture is more little, and the solids that dams is many more, but the backwash frequency is also just high more.The rotary drum Microfilter time easily causes the fragmentation of larger particles in operation, and strong current impulsive force during backwash may make bulky grain be broken into molecule once more and passes screen pack.From Fig. 3 curve as can be known, when screen pack order number increases to this section of 200 orders (mesh is 70 μ m) by 150 orders (mesh is 100 μ m), clearance increases sharply with the increase of order number; When screen pack order number increases to this section of 325 orders (mesh is 45 μ m) by 200 orders (mesh is 70 μ m), clearance increases slowly with the increase of order number, and curve is smooth, almost near straight line.As seen, after screen pack order number reached 200 orders (mesh is 70 μ m), the TSS clearance no longer obviously increased.
Simultaneously, as can see from Figure 3, the different filtration under the mesh number, Microfilter of the present invention on average exceeds about 10% than traditional Microfilter the clearance of TSS.
The power consumption of rotary drum Microfilter is made up of two parts, and the one, electromotor drives rotary drum by reductor and rotates, and the 2nd, the power that backwash pump consumes.The power consumption that rotary drum rotates is in service at the rotary drum Microfilter to be stable basically, and along with the increase of filtering the mesh number, the frequency of backwash also can improve, and power consumption also will rise because of the increase of backwash number of times.Water consumption also is to estimate an important indicator of rotary drum Microfilter performance, and it is directly proportional with the backwash number of times.Along with the increase of filtering the mesh number, the frequency of backwash also can improve, and water consumption also rises thereupon, and concrete data see table 1 and table 2 for details.
The backwash number of times under the difference filtration mesh number of the traditional Microfilter of table 1 and the relation of power consumption and water consumption
The backwash number of times under the difference filtration mesh number of table 2 Microfilter of the present invention and the relation of power consumption and water consumption
After the data of table 1 and table 2 were gathered, the filtration mesh number of traditional Microfilter and Microfilter of the present invention and the relation curve of power consumption and water consumption were seen Fig. 4 and Fig. 5.From the curve of Fig. 4 and Fig. 5 as can be known, filter the mesh number and increase to this section of 200 orders (mesh is 70 μ m) by 150 orders (mesh is 100 μ m), the power consumption increase is slower, and curve is smooth; Filter the mesh number and increase to this section of 325 orders (mesh is 45 μ m) by 200 orders (mesh is 70 μ m), power consumption increases sharply, and curve is steeper.
Simultaneously, we can see that also the power consumption of Microfilter of the present invention greatly reduces than traditional Microfilter, the average reduction about 6kW under the different meshes, and water consumption also decreases.
The general breed in the discharge water accounts for more than 80% of total particle suspension greater than the particle suspensions of 100 μ m, and its corresponding mesh is about 170 orders (mesh is 90 μ m).Therefore, when filtering the mesh number and be 150 orders (mesh is 100 μ m) to 200 orders (mesh is 70 μ m), the TSS clearance is higher, and the backwash frequency is not high, and the water consumption power consumption is little, is the more satisfactory scope of Technological Economy resultant effect.Simultaneously, the silk screen of 200 orders (mesh is 70 μ m)-250 orders (mesh is 60 μ m) that adopt compared to general traditional Microfilter, under the situation that does not reduce the TSS clearance, it is nearly 15% to adopt the screen pack of the present invention's 170 orders (mesh is 90 μ m) mesh can improve filter area, and the amount of water treatment simultaneously can improve more than 10%.
In sum, rotary drum and back purge system are filtered in the intermittently startup that the present invention adopts, and screen pack is carried out backwash, stop to filter the rotation of rotary drum and the running of back purge system after finishing, can effectively reduce the energy consumption of Microfilter, prolong the life-span of screen pack; Also can effectively avoid the phenomenon of the finely ground particles that bigger solid particle is difficult to remove owing to the filtration rotary drum that rotates all the time causes fragmentation to produce, thereby greatly improve the effect of filtering.
Claims (18)
1. method of removing solid suspended particles in the aquaculture system, it is characterized in that, it may further comprise the steps: the aquiculture waste water that will contain solid suspended particles enters into continuously from water inlet pipe in the perforate bowl of Microfilter, and waste water filters the back by the perforate bowl screen pack and discharges from drainpipe; Intermittently drive perforate bowl and rotate, start back purge system simultaneously screen pack is washed, so that the particle on the screen pack is washed away, flushing stops the rotation of perforate bowl and the flushing of back purge system after finishing.
2. the method for solid suspended particles in the removal aquaculture system according to claim 1 is characterized in that: by the startup of automaton controlled filter rotary drum and back purge system.
3. the method for solid suspended particles in the removal aquaculture system according to claim 2, it is characterized in that: described automaton comprises the time relay or level sensor.
4. the method for solid suspension in the removal aquaculture system according to claim 3 is characterized in that: driven the perforate bowl rotation every 15-30 minute and started back purge system once by time relay control, washing time is 30-40 second.
5. the method for solid suspended particles in the removal water cultivating system according to claim 4 is characterized in that: rinse stage perforate bowl rotation 2.2-2.8 circle.
6. the method for solid suspended particles in the removal aquaculture system according to claim 3, it is characterized in that: the submergence of aquiculture waste water in the Microfilter casing remains on the 34-58% of perforate bowl diameter, described level sensor is located at box inside, and it highly is the 52-58% part of perforate bowl diameter height, when water level in the casing reached the height of level sensor, level sensor sent signal and starts perforate bowl and back purge system simultaneously.
7. according to the method for solid suspension in each described removal water cultivating system of claim 1 to 6, it is characterized in that: the screen pack mesh of described perforate bowl is the 150-200 order.
8. filtration system of removing solid suspended particles in the aquaculture system, it is characterized in that: it comprises Microfilter and automaton, described Microfilter comprises cover, casing, central support shaft, perforate bowl, back purge system, backwash pump, dirt collecting bucket, motor, transmission device, water inlet pipe and drainpipe, described central support shaft is hollow and is fixed in the casing, described perforate bowl and central support shaft are rotationally connected, and one or more pieces screen packs are equipped with on the perforate bowl surface, described dirt collecting bucket opening upwards is located at perforate bowl inside and is installed on the described central support shaft, and the dirt collecting bucket bottom communicates with central support shaft, described back purge system is installed in the position of described cover or box inside and corresponding described dirt collecting bucket opening, described backwash pump is connected with back purge system, described transmission device connects perforate bowl and motor, and described water inlet pipe and drainpipe are located on the casing; Described automaton is connected with motor with backwash pump.
9. the filtration system of solid suspended particles in the removal aquaculture system according to claim 8, it is characterized in that: described automaton comprises the time relay or level sensor.
10. the filtration system of solid suspended particles in the removal aquaculture system according to claim 9, it is characterized in that: described level sensor is located at box inside, and it highly is the 52-58% part of perforate bowl diameter height.
11. according to the filtration system of solid suspended particles in claim 9 or the 10 described removal aquaculture systems, it is characterized in that: the screen pack mesh of described perforate bowl is the 150-200 order.
12. the filtration system of solid suspended particles in the removal aquaculture system according to claim 11 is characterized in that: the screen pack mesh of described perforate bowl is 170 orders.
13. the filtration system of solid suspended particles in the removal aquaculture system according to claim 12, it is characterized in that: described screen pack is loaded on the outer surface of perforate bowl.
14. the filtration system of solid suspended particles in the removal aquaculture system according to claim 8 is characterized in that: described perforate bowl is rotationally connected by two sliding bearings and central support shaft.
15. the filtration system of solid suspended particles in the removal aquaculture system according to claim 8 is characterized in that: described back purge system comprises several shower nozzles on backwash tube and the backwash tube.
16. the filtration system of solid suspended particles in the removal aquaculture system according to claim 15 is characterized in that: the both sides of described dirt collecting bucket opening are near the both sides of perforate bowl, in the corresponding dirt collecting bucket opening scope of the position of described several shower nozzles.
17. the filtration system of solid suspended particles in the removal aquaculture system according to claim 8, it is characterized in that: described transmission device comprises reductor and gear train, and perforate bowl, gear train, reductor and motor are connected successively.
18. the filtration system of solid suspended particles in the removal aquaculture system according to claim 17 is characterized in that: described reductor is a cycloidal planetary gear speed reducer.
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