阅读说明：本技术 一种模块化水产养殖场水循环智能控制装置及方法 (Intelligent control device and method for water circulation of modular aquaculture farm ) 是由 许明 沈晓笑 马吴成 郭可 薛朝霞 操家顺 于 2021-07-28 设计创作，主要内容包括：本发明公开了一种模块化水产养殖场水循环智能控制装置及方法,依次包括给水系统、排水系统、水处理系统、回用水系统和养殖系统5个模块；所述给水系统一侧与养殖系统连接用于补水,另一侧与排水系统连接用于排出污水,养殖系统废水经水处理系统处理后符合回用要求则进入给水系统混合,符合排放要求则由水处理系统排放；所述给水系统、排水系统、水处理系统、回用水系统均设置水质监测仪以根据检测结果判定智能化控制水流流向和流量,节约水资源30%以上,污染物削减50%以上。本发明解决了水产养殖水量浪费量大、水质污染、灌排水系不畅、水体流动性差、水产养殖品质下降、管理操作难度大等问题。(The invention discloses a water circulation intelligent control device and a water circulation intelligent control method for a modular aquaculture farm, which sequentially comprise 5 modules of a water supply system, a water drainage system, a water treatment system, a recycling water system and a culture system; one side of the water supply system is connected with the culture system for supplying water, the other side of the water supply system is connected with the drainage system for draining sewage, the wastewater of the culture system is treated by the water treatment system and then enters the water supply system for mixing if meeting the recycling requirement, and the wastewater meeting the drainage requirement is drained by the water treatment system; the water supply system, the drainage system, the water treatment system and the reuse water system are all provided with water quality monitors to judge the flow direction and the flow rate of the intelligent control water flow according to the detection result, so that the water resource is saved by more than 30 percent, and the pollutant is reduced by more than 50 percent. The invention solves the problems of large waste amount of aquaculture water, water pollution, unsmooth water filling and draining system, poor water body fluidity, reduced aquaculture quality, large management and operation difficulty and the like.)

1. A water circulation intelligent control device of a modularized aquaculture farm is characterized by sequentially comprising 5 modules of a water supply system, a drainage system, a water treatment system, a recycling water system and a culture system; one side of the water supply system is connected with the culture system for supplying water, the other side of the water supply system is connected with the drainage system for draining sewage, the wastewater of the culture system is treated by the water treatment system and then enters the water supply system for mixing if meeting the recycling requirement, and the wastewater meeting the drainage requirement is drained by the water treatment system; and the water supply system, the water drainage system, the water treatment system and the reuse water system are all provided with water quality monitors to judge the flow direction and the flow rate of the intelligent control water flow according to detection results.

2. The intelligent control device for water circulation of a modular aquaculture farm of claim 1 wherein said aquaculture system comprises a plurality of aquaculture ponds; the water supply system comprises a water inlet channel, a water distribution pump and a pressure pipe, and water in the water inlet channel is pumped into the pressure pipe through the water distribution pump and is conveyed to each aquaculture pond; the drainage system comprises a water outlet, a branch ditch, a main ditch, a drainage pump and a pressure pipe, and sewage flowing into the branch ditch from the aquaculture pond and collected in the main ditch is lifted to the pressure pipe by the drainage pump and is conveyed to the treatment system; the treatment system comprises a wetland treatment unit, a biological treatment unit, a water outlet and a water outlet channel, and tail water which is purified and meets the discharge requirement is discharged into the water outlet channel; the recycling system comprises a three-way pool, an electric gate and a return channel, and tail water which is purified and meets recycling requirements is discharged into the return channel.

3. The intelligent control device for water circulation of a modular aquaculture farm of claim 2 wherein said aquaculture ponds are symmetrically distributed along two upper and lower zones and are longitudinally arranged within the zones and equidistantly spaced apart from one another in the rows; the water inlet channel is positioned on the left side of the culture system and is connected with the pond through a pressure pipe; the water outlet is arranged on the connecting pond, the branch ditches are distributed in the interval areas among the rows of the pond, the main ditches are distributed in the middle areas among the upper and lower areas of the pond, and the branch ditches are connected with the main ditches and connected with the treatment system through pressure pipes; the wetland treatment unit and the biological treatment unit are positioned on the right side of the culture system, and the water outlet channel is positioned on the right side of the treatment system; the three-way pool is respectively arranged in the water outlet areas of the wetland treatment unit and the biological treatment unit and is connected with the water outlet channel and the backflow channel through the electric gate, and the backflow channel is respectively positioned on the upper side of the upper section area and the lower side of the lower section area of the culture system and is connected with the water inlet channel.

4. The intelligent control method for the water circulation of the modular aquaculture farm based on the intelligent control device for the water circulation of the modular aquaculture farm of claim 1 is characterized by comprising the following steps of:

step 1: a water distribution pump of the water supply system pumps water in the nature in the water inlet channel into a pressure pipe and conveys the water into each culture pond of the culture system;

step 2: when the water needs to be drained in the culture process, the drainage system opens a water outlet of the pond, the culture sewage is collected to the dry ditch after passing through the branch ditches, and is lifted to the pressure pipe by the drainage pump, and according to the detection result C of the water quality monitor₂Judging that the sewage enters a wetland treatment unit or a biological treatment unit;

and step 3: purifying the aquaculture sewage by a wetland treatment unit or a biological treatment unit, then feeding the aquaculture sewage into a three-way tank, and detecting the aquaculture sewage according to the detection result C of a water quality monitor₃Judging and controlling the electric gate to open a return canal gate or a water outlet canal gate;

and 4, step 4: if the purified tail water enters a return channel of the recycling system, according to the detection result C of the water quality monitor₄Calculating Q₂；

And 5: and (4) enabling the water discharged from the recycling system to enter a water supply system, and repeating the steps 1 to 4 to form the intelligent control of the water circulation of the modular aquaculture farm.

5. The intelligent control method for water circulation of modular aquaculture farm of claim 4 wherein the water supply flow Q of the water supply system in step 1 is₁The calculation method is as follows:

s: taking 0.41-0.62 of seasonal strain parameters without dimension;

m: the culture density strain coefficient is 0.13-0.36 and is dimensionless;

t: the strain coefficient of the culture period is 0.02-0.28, and is dimensionless;

n: taking 50-100% of ponds (5-1) in the culture system (5);

v: the conventional water capacity of the pond (5-1) is 4500-6500 m³；

t: the water supply time of the water supply system (1) is 0.08-0.125 d;

σ: taking 0.5-0.7 of the original ecological water source proportion;

Q₂: recycling flow m of the recycling system (4)³/d；

τ: taking the tail water in a recycling ratio of 0.3-0.5.

6. The intelligent control method for the water circulation of the modular aquaculture farm of claim 4, wherein the method for judging the sewage entering the wetland treatment unit or the biological treatment unit in the step 2 is as follows:

the concentration of dissolved oxygen and ammonia nitrogen in the effluent in the drainage system (2) is mg/L;

the discharge limit values of dissolved oxygen and ammonia nitrogen concentration of the aquaculture tail water are mg/L;

θ: the maximum pollutant acceptance ratio of the wetland treatment system (3-1) is 2.5-3.7, and the method is dimensionless;

beta: the maximum acceptance ratio of pollutants in the biological treatment system (3-2) is 3.7-5.0, and the maximum acceptance ratio is dimensionless.

7. The intelligent control method for water circulation of a modular aquaculture farm of claim 4, wherein the method for determining whether the electric sluice opens the return canal gate or the outlet canal gate in step 3 is as follows:

the concentration of dissolved oxygen and ammonia nitrogen in the effluent in the treatment system (3) is mg/L;

the discharge limit values of dissolved oxygen and ammonia nitrogen concentration of the aquaculture tail water are mg/L;

α: the maximum acceptance ratio of pollutants in the water outlet channel (3-4) is 1.0-1.5, and the maximum acceptance ratio is dimensionless;

λ: the maximum acceptance ratio of pollutants in the recycling system (4) is 0.7-1.0, and the method is dimensionless.

8. The intelligent control method for water circulation of modular aquaculture farm of claim 4 wherein flow Q of tail water purified in step 4 into return canal₂The calculation method of (3) is as follows:

the concentration of dissolved oxygen and ammonia nitrogen of the reuse water in the return channel (4-3) is mg/L;

water supply system (1) The concentration of dissolved oxygen and ammonia nitrogen in the original ecological water is mg/L;

θ: the maximum acceptance ratio of the dissolved oxygen of the water supply system (1) is 0.8-1.0, and the maximum acceptance ratio is dimensionless;

ω: the maximum receiving ratio of ammonia nitrogen in the water supply system (1) is 0.9-1.1, and the dimension is not required.

Technical Field

The invention belongs to the field of aquaculture, and particularly relates to a modularized intelligent control device and method for water circulation of an aquaculture farm.

Background

With the rapid development of aquaculture industry. On one hand, the problems of large waste amount of aquaculture water, water pollution, unsmooth water filling and draining system, poor water body fluidity, reduced aquaculture quality, large management and operation difficulty and the like are increasingly highlighted. On the other hand, the continuous improvement of the treatment and discharge requirements of aquaculture wastewater directly influences the water body environment quality of aquaculture water areas, further causes the reduction of the yield and quality of aquaculture products, and forms a vicious circle. Research data show that: the concentration of pollutants such as ammonia nitrogen, nitrate nitrogen and the like in the water body can be improved due to decomposition products of baits, corpses of aquatic plants, excrement of fishes and the like in the water body, and the content of dissolved oxygen in the water body is greatly reduced. Therefore, in order to solve the above problems, advanced, scientific and intelligent tail water treatment and circulating aquaculture methods must be adopted to solve a series of problems caused by aquaculture wastewater.

Application number CN201410682222.6 discloses an industrial aquaculture system and its intelligent control system, which is connected with the industrial aquaculture system and comprises: various water quality detection sensors/analyzers and various water treatment equipment state detection sensors/analyzers are distributed at different positions of an industrial culture system; at least one interface unit connected to the sensor and the analyzer, and a control unit connected to the interface unit; the interface unit is used for receiving signals from various water quality detection sensors/analyzers and various water treatment equipment state detection sensors/analyzers and acquiring water quality state and water treatment equipment state detection data; and the control unit is used for regulating and controlling the water quality and the equipment of the industrial aquaculture system and giving early warning according to the water quality state and the water treatment equipment state detection data received by the receiving unit. Thereby ensuring that the water quality of the industrial aquaculture system meets the growth requirement of aquatic products and ensuring the safe operation of the whole aquaculture system. However, the device lacks the functions of automatically regulating and controlling the circulating systems among the culture pond, the clean water pond and the sewage treatment pond according to the real-time water quality condition and recycling water resources, and does not relate to water quality and water treatment.

Application number 202010840384.3, an oxygen content intelligent monitoring device for aquaculture discloses an oxygen content intelligent monitoring device for aquaculture, including casing and main part, the main part setting is in the casing, the main part includes that the front end holds the chamber and the chamber is held to the rear end, and the front end holds the chamber and the chamber is held to the rear end for symmetrical structure, the front end holds the chamber and includes mounting structure, control system and power supply system, be provided with striking trigger device and detection device in the mounting structure, control system control detection device function, power supply system is the control system power supply, adopts automatic detection and passively move about and detect two kinds of modes, through moving about of fish shrimp in the high density breed pond, to detection device's striking to trigger detection device and detect the oxygen content in current waters. However, the device does not intelligently control water circulation and water treatment, and a water supply system, a drainage system, a reuse water system and the like in the culture system are not described.

Application number 202010840411.7, an oxygen content monitoring system and method suitable for high-density aquaculture, which provides an oxygen content monitoring system suitable for high-density aquaculture, comprising a plurality of oxygen content detection devices, a boat-type oxygen supply machine, a user mobile phone end and a remote sensing locator; the oxygen content detection device is used for detecting the oxygen content in the water and transmitting the oxygen content to the mobile phone end of the user; receiving a positioning instruction, adjusting the position of the positioning instruction, and transmitting the real-time position of the oxygen content detection device to a mobile phone end of a user by using a remote sensing positioner; the ship type oxygen supply machine receives a control instruction of a mobile phone end of a user and supplies oxygen to the high-density aquaculture farm; and the user mobile phone end displays the oxygen content in water in real time, controls the boat-type oxygen supply machine to supply oxygen to a specified position, and sends a positioning instruction to the oxygen content detection device. However, the invention only monitors the oxygen content, and does not intelligently control other water quality index monitoring and water circulation.

Application No. 202010860394.3, an aquaculture pollution biological ecological purification and recycling system and method, the system comprises an aquaculture pond, a biological sedimentation tank, a double-medium biological filter, a deep ecological purification pond, an internal circulation ecological ditch, a water purification activation tank and a disinfection tank which are sequentially communicated, and the disinfection tank is communicated with the aquaculture pond. The aquaculture water is purified by physical, chemical and biological ecological purification methods, so that the aquaculture water is recycled, and residual baits, excrement, nitrogen, phosphorus, organic matters and residual fish drugs in the aquaculture water are effectively controlled and removed; and (4) restoring the bottom mud discharged by the biological sedimentation tank by the bottom mud and then using the bottom mud in farmlands or orchards. The method realizes zero emission of pollutants, is environment-friendly, realizes ecological and healthy aquaculture, has little or no pollution to the environment, and is environment-friendly and safe. However, the invention does not have the requirements on the quantity of circulating water and the reuse concentration of wastewater pollutants, has large water resource waste and does not optimize the existing drainage system.

Disclosure of Invention

The invention discloses a water circulation intelligent control device and a water circulation intelligent control method for a modular aquaculture farm, which sequentially comprise 5 modules of a water supply system, a water drainage system, a water treatment system, a recycling water system and a culture system; one side of the water supply system is connected with the culture system for supplying water, the other side of the water supply system is connected with the drainage system for draining sewage, the wastewater of the culture system is treated by the water treatment system and then enters the water supply system for mixing if meeting the recycling requirement, and the wastewater meeting the drainage requirement is drained by the water treatment system; and the water supply system, the water drainage system, the water treatment system and the reuse water system are all provided with water quality monitors to judge the flow direction and the flow rate of the intelligent control water flow according to detection results. According to the invention, the water quality monitor is arranged to control the flow direction and flow rate of water flow according to the detection result, so that the effects of purifying and recycling water resources are achieved. The invention mainly solves the problems of large waste amount of aquaculture water, water pollution, unsmooth water filling and draining system, poor water body fluidity, reduced aquaculture quality, large management operation difficulty and the like.

Preferably, the aquaculture system comprises a plurality of ponds; the water supply system comprises a water inlet channel, a water distribution pump and a pressure pipe, and water in the water inlet channel is pumped into the pressure pipe through the water distribution pump and is conveyed to each pond; the drainage system comprises a water outlet, branch ditches, a dry ditch, a drainage pump and a pressure pipe, and sewage flowing into the branch ditches from the pond and collected in the dry ditch is lifted to the pressure pipe by the drainage pump and is conveyed to the treatment system; the treatment system comprises a wetland treatment unit, a biological treatment unit, a water outlet and a water outlet channel, and tail water which is purified and meets the discharge requirement is discharged into the water outlet channel; the recycling system comprises a three-way pool, an electric gate and a return channel, and tail water which is purified and meets recycling requirements is discharged into the return channel.

Preferably, the aquaculture ponds are distributed along an upper area and a lower area, and are longitudinally arranged in the areas and are distributed at intervals among the rows; the water inlet channel is positioned on the left side of the culture system and is connected with the culture pond through a pressure pipe; the water outlet is arranged on the connecting aquaculture pond, the branch ditches are distributed in the spaced areas between the rows of the aquaculture pond, the main ditches are distributed in the spaced middle areas between the upper and lower areas of the aquaculture pond, and the branch ditches are connected with the main ditches and connected with the treatment system through pressure pipes; the wetland treatment unit and the biological treatment unit are positioned on the right side of the culture system, and the water outlet channel is positioned on the right side of the treatment system; the three-way pool is respectively arranged in the water outlet areas of the wetland treatment unit and the biological treatment unit and is connected with the water outlet channel and the backflow channel through the electric gate, and the backflow channel is respectively positioned on the upper side of the upper section area and the lower side of the lower section area of the culture system and is connected with the water inlet channel.

An intelligent control method for water circulation of a modular aquaculture farm comprises the following steps:

step 1: a water distribution pump of the water supply system pumps water in the nature in the water inlet channel into a pressure pipe and conveys the water into each pond of the culture system;

step 2: when water needs to be drained in the culture process, the drainage system opens a water outlet of the pond, and culture sewage passes throughCollecting the sewage to a dry ditch after passing through a branch ditch, lifting the sewage to a pressure pipe by a drainage pump, and detecting the sewage according to a detection result C of a water quality monitor₂Judging that the sewage enters a wetland treatment unit or a biological treatment unit;

and step 3: purifying the aquaculture sewage by a wetland treatment unit or a biological treatment unit, then feeding the aquaculture sewage into a three-way tank, and detecting the aquaculture sewage according to the detection result C of a water quality monitor₃Judging and controlling the electric gate to open a return canal gate or a water outlet canal gate;

and 4, step 4: if the purified tail water enters a return channel of the recycling system, according to the detection result C of the water quality monitor₄Calculating Q₂；

And 5: and (4) enabling the water discharged from the recycling system to enter a water supply system, and repeating the steps 1-4 to form a water circulation system of the intensive aquaculture farm.

Preferably, the water supply flow rate Q of the water supply system in the step 1₁The calculation method is as follows:

s: taking 0.41-0.62 of seasonal strain parameters without dimension;

m: the culture density strain coefficient is 0.13-0.36 and is dimensionless;

t: the strain coefficient of the culture period is 0.02-0.28, and is dimensionless;

n: taking 50-100% of ponds (5-1) in the culture system (5);

v: the conventional water capacity of the pond (5-1) is 4500-6500 m³；

t: the water supply time of the water supply system (1) is 0.08-0.125 d;

σ: taking 0.5-0.7 of the original ecological water source proportion;

Q₂: recycling flow m of the recycling system (4)³/d；

τ: taking the tail water according to the recycling proportion of 0.3-0.5;

preferably, the method for judging the sewage entering the wetland treatment unit or the biological treatment unit in the step 2 is as follows

Formula 2:

the concentration of dissolved oxygen and ammonia nitrogen in the effluent in the drainage system (2) is mg/L;

the discharge limit values of dissolved oxygen and ammonia nitrogen concentration of the aquaculture tail water are mg/L;

θ: the maximum pollutant acceptance ratio of the wetland treatment system (3-1) is 2.5-3.7, and the method is dimensionless;

beta: the maximum pollutant acceptance ratio of the biological treatment system (3-2) is 3.7-5.0, and the maximum pollutant acceptance ratio is dimensionless;

preferably, the method for determining whether the electric gate opens the backflow canal gate or the water outlet canal gate in step 3 is as follows:

the concentration of dissolved oxygen and ammonia nitrogen in the effluent in the treatment system (3) is mg/L;

the discharge limit values of dissolved oxygen and ammonia nitrogen concentration of the aquaculture tail water are mg/L;

α: the maximum acceptance ratio of pollutants in the water outlet channel (3-4) is 1.0-1.5, and the maximum acceptance ratio is dimensionless;

λ: the maximum acceptance ratio of pollutants in the recycling system (4) is 0.7-1.0, and the dimension is not needed;

preferably, the tail water purified in the step 4 enters a return canalFlow rate Q₂The calculation method of (3) is as follows:

the concentration of dissolved oxygen and ammonia nitrogen of the reuse water in the return channel (4-3) is mg/L;

the concentration of dissolved oxygen and ammonia nitrogen in the raw ecological water in the water supply system (1) is mg/L;

θ: the maximum acceptance ratio of the dissolved oxygen of the water supply system (1) is 0.8-1.0, and the maximum acceptance ratio is dimensionless;

ω: the maximum receiving ratio of ammonia nitrogen in the water supply system (1) is 0.9-1.1, and the dimension is not required;

compared with the prior art, the invention has the beneficial effects that:

(1) the invention constructs 5 modules of a water supply system, a drainage system, a water treatment system, a reuse water system and a culture system, accurately monitors and scientifically regulates and controls the flow direction and the flow rate of water flow by arranging the water quality monitors among the modules, realizes the intellectualization, the automation of environment monitoring and the automation of water flow regulation and control, and solves the problems of poor water body fluidity, reduced aquaculture quality, high management and operation difficulty and the like.

(2) According to the invention, tail water treatment and tail water recycling are organically combined together through regulation and control of water quantity and water quality, so that effects of water quality purification and water saving are achieved, water resources can be saved by more than 30% through tail water recycling, pollutants are reduced by more than 50%, the problems of large waste quantity of aquaculture water, water quality pollution, unsmooth water irrigation and drainage system and the like are solved, and green and efficient development of a culture system is realized.

Drawings

FIG. 1 is a top view of a modular aquaculture farm water circulation intelligent control device;

FIG. 2 is a control flow chart of the intelligent control device for water circulation of the modular aquaculture farm;

FIG. 3 is a sectional structure view of a middle dry ditch area of the intelligent control device for water circulation of the modular aquaculture farm;

FIG. 4 is a sectional view of the upper side branch ditch region of the intelligent control device for water circulation of the modular aquaculture farm;

FIG. 5 is a right side view of the intelligent control device for water circulation in a modular aquaculture farm;

FIG. 6 is a sectional view of the right treatment system of the intelligent control device for water circulation in a modular aquaculture farm.

Wherein, 1-a water supply system, 1-1-a water inlet channel, 1-2-a water distribution pump, 1-3-a pressure pipe and 1-4-a water quality monitor; 2-drainage system, 2-1-water outlet, 2-2-branch ditch, 2-3-dry ditch, 2-4-drainage pump, 2-5-pressure pipe, 2-6-water quality monitor; 3-a treatment system, 3-1-a wetland treatment unit, 3-2-a biological treatment unit, 3-3-a water outlet, 3-4-a water outlet channel, 3-5-a water quality monitor and 3-6-a water outlet gate; 4-a recycling system, 4-1-a three-way pool, 4-2-an electric gate, 4-3-a return channel and 4-4-a water quality monitor; 5-culture system, 5-1-pond and 5-2-filter screen.

Detailed Description

The technical scheme of the invention is further explained by combining the attached drawings and the detailed implementation mode.

Example 1

As shown in fig. 1 and fig. 3-6, a modular intelligent control device for water circulation of an aquaculture farm comprises a water supply system (1), a water drainage system (2), a treatment system (3), a recycling system (4) and a culture system (5). One side of the culture system (5) is connected with the water supply system (1) for water inlet, the other side of the culture system is connected with the drainage system (2) for sewage discharge, the sewage enters the water supply system (1) through the recycling system (4) after being treated by the treatment system (3) according with recycling requirements, and the sewage is discharged by the treatment system (3) according with discharging requirements.

The culture system (5) comprises 50 ponds (5-1) and a filter screen (5-2). The ponds are distributed along an upper sheet area and a lower sheet area, and are longitudinally arranged in the areas and are distributed at intervals among the rows. The normal water capacity of each pond is 5000m³。

The water supply system (1) comprises a water inlet channel (1-1), a water distribution pump (1-2), a pressure pipe (1-3) and a water quality monitor (1-4). The water inlet channel (1-1) is positioned at the left side of the culture system (5), and the water quality monitor (1-4) is arranged to monitor the water quality of the water inlet channel (1-1). The pressure pipes (1-3) are connected with the ponds (5-1), and water in the nature in the water inlet channel (1-1) is pumped into the pressure pipes (1-3) to be conveyed into the ponds (5-1) under the action of the water distribution pump (1-2).

The drainage system (2) comprises a water outlet (2-1), a branch ditch (2-2), a dry ditch (2-3), a drainage pump (2-4), a pressure pipe (2-5) and a water quality monitor (2-6). The water outlet (2-1) is arranged on the connecting pond (5-1) and is used for discharging the water into the branch ditch (2-2). The branch ditches (2-2) are distributed in the interval area between the rows of the pond (5-1), the dry ditches (2-3) are distributed in the interval middle area between the upper area and the lower area of the pond (5-1), and the branch ditches (2-2) are connected with the dry ditches (2-3) and used for discharging sewage discharged from the pond (5-1) into the branch ditches (2-2) and collecting the sewage into the dry ditches (2-3). The pressure pipes (2-5) are respectively connected with the wetland treatment unit (3-1) and the biological treatment unit (3-2) of the treatment system (3), the sewage in the dry ditch (2-3) is lifted to the pressure pipes (2-5) under the action of the drainage pump (2-4), and the sewage is judged to enter the wetland treatment unit (3-1) or the biological treatment unit (3-2) according to the detection result of the water quality monitor (2-6) in the dry ditch (2-3).

The treatment system (3) comprises a wetland treatment unit (3-1), a biological treatment unit (3-2), a water outlet (3-3), a water outlet channel (3-4), a water quality monitor (3-5) and a water outlet gate (3-6). The wetland treatment unit (3-1) and the biological treatment unit (3-2) are positioned at the right side of the culture system (5) and are used for purifying sewage. The water quality monitor (3-5) is arranged at the water outlets of the wetland treatment unit (3-1) and the biological treatment unit (3-2) and is used for detecting the water quality. The water outlet gate is positioned between the wetland treatment unit (3-1), the biological treatment unit (3-2) and the three-way tank (4-1) and is used for discharging the water discharged from the treatment unit into the three-way tank. The water outlet (3-3) is positioned on the three-way pool (4-1) and is used for discharging tail water allowed to be discharged into the right water outlet channel (3-4).

The recycling system (4) comprises a three-way pool (4-1), an electric gate (4-2), a return channel (4-3) and a water quality monitor (4-4). The three-way pool (4-1) is respectively arranged in the water outlet areas of the wetland treatment unit (3-1) and the biological treatment unit (3-2), and the flow direction of water flow is controlled by the electric brake (4-2) according to the detection result of the water quality monitor (3-5). The backflow channel (4-3) is respectively positioned on the upper side of the upper section area and the lower side of the lower section area of the culture system (5) and is connected with the three-way pool (4-1) and the water inlet channel (1-1), and backflow tail water can be discharged into the water inlet channel (1-1) according to the detection result of the water quality monitor (4-4) in the backflow channel (4-3).

The pump type of the water distribution pump (1-2) IS an IS centrifugal pump, and the specific type can be selected according to the actual flow and the related standard; the pressure pipes (1-3) are matched with the relevant pump types. The water quality monitors (1-4), (2-6), (3-5) and (4-4) have independent water quality detection, judgment and signal transmission functions, the measurement range is (0.0-20.0) mg/L, and the precision is 0.1 mg/L; the decision time is 0.5 ms. The three-way tank (4-1) is provided with three valves which are controlled to open and close by an electric valve. An electric grille net is arranged in front of the drainage pump (2-4) for blocking sewage, and obstacles such as scum, aquatic weeds and the like in water can be automatically intercepted before sewage discharge.

As shown in fig. 2, an intelligent control method for water circulation of a modular aquaculture farm comprises the following steps:

step 1: a water distribution pump (1-2) of the water supply system (1) pumps water in the nature in the water inlet channel (1-1) into a pressure pipe (1-3) to be conveyed into each pond (5-1) of the culture system (5), and the water supply flow Q of the water supply system (1)₁The calculation method is as follows:

s: taking 0.41-0.62 of seasonal strain parameters without dimension;

m: the culture density strain coefficient is 0.13-0.36 and is dimensionless;

t: the strain coefficient of the culture period is 0.02-0.28, and is dimensionless;

n: taking 50-100% of ponds (5-1) in the culture system (5);

v: the conventional water capacity of the pond (5-1) is 4500-6500 m³；

t: the water supply time of the water supply system (1) is 0.08-0.125 d;

σ: taking 0.5-0.7 of the original ecological water source proportion;

Q₂: go back toReuse of flow m by system (4)³/d；

τ: taking the tail water according to the recycling proportion of 0.3-0.5;

in this example, in spring, S is 0.52, 10000 baits are left in each pond, M is 0.23, T is 0.02, water supply time T is 0.1d per day, and Q is₂Take 0, calculate, Q₁192.5 ten thousand meters³。

Step 2: when drainage is needed in the culture process, the drainage system (2) opens a drainage outlet (2-1) of the pond (5-1), culture sewage is collected to a dry ditch (2-3) after passing through a branch ditch (2-2), the sewage is lifted to a pressure pipe (2-5) by a drainage pump (2-4), and according to a detection result C of a water quality monitor (2-6)₂And judging that the sewage enters the wetland treatment unit (3-1) or the biological treatment unit (3-2). The judging method is as the formula 2:

the concentration of dissolved oxygen and ammonia nitrogen in the effluent in the drainage system (2) is mg/L;

the discharge limit values of dissolved oxygen and ammonia nitrogen concentration of the aquaculture tail water are mg/L;

θ: the maximum pollutant acceptance ratio of the wetland treatment system (3-1) is 2.5-3.7, and the method is dimensionless;

beta: the maximum pollutant acceptance ratio of the biological treatment system (3-2) is 3.7-5.0, and the maximum pollutant acceptance ratio is dimensionless;

in the present embodiment, the first and second electrodes are,the calculated discharge ratio is 5 and 5, and the tail water enters a biological treatment system (3-2) for tail water treatment.

And step 3: the aquaculture sewage enters the wetland treatment unit (3-1) or the biological treatment unit (3-2) after being purifiedA three-way pool (4-1) according to the detection result C of the water quality monitor (3-5)₃And judging and controlling the electric gate (4-2) to open the gate of the return channel (4-3) or the gate of the water outlet channel (3-4). The judging method is as formula 3:

the concentration of dissolved oxygen and ammonia nitrogen in the effluent in the treatment system (3) is mg/L;

the discharge limit values of dissolved oxygen and ammonia nitrogen concentration of the aquaculture tail water are mg/L;

α: the maximum acceptance ratio of pollutants in the water outlet channel (3-4) is 1.0-1.5, and the maximum acceptance ratio is dimensionless;

λ: the maximum acceptance ratio of pollutants in the recycling system (4) is 0.7-1.0, and the dimension is not needed;

in the present embodiment, the first and second electrodes are,the maximum discharge ratio was calculated to be 1.5, 0.9, allowing discharge into the channels (3-4).

And 4, step 4: if the tail water after purification enters a return channel (4-3) of the recycling system (4), according to the detection result C of the water quality monitor (4-4)₄Calculating the flow Q of tail water entering the return canal₂. The calculation method is as follows:

the concentration of dissolved oxygen and ammonia nitrogen of the reuse water in the return channel (4-3) is mg/L;

the concentration of dissolved oxygen and ammonia nitrogen in the raw ecological water in the water supply system (1) is mg/L;

θ: the maximum acceptance ratio of the dissolved oxygen of the water supply system (1) is 0.8-1.0, and the maximum acceptance ratio is dimensionless;

ω: the maximum receiving ratio of ammonia nitrogen in the water supply system (1) is 0.9-1.1, and the dimension is not required;

in the embodiment, the purified tail water is discharged into the water outlet channels (3-4), and the recycling system (4) is not adopted.

And 5: and (3) enabling the water discharged from the recycling system (4) to enter a water supply system (1), and repeating the steps 1-4 to form a modular aquaculture farm water circulation intelligent control system.

Example 2

The difference from example 1 is that: step 3 detection result C of water quality monitor (3-5)₃Is composed ofThe maximum discharge ratio was calculated to be 1.1, 1.0, allowing discharge into the return channel (4-3).

Tail water enters a three-way pool (4-1) of the recycling system (4), and an electric gate (4-2) determines to open a gate of a return channel (4-3) according to the judgment of a water quality monitor (3-5).

And 4, step 4: the tail water after purification enters a return channel (4-3) of a recycling system (4) and is detected according to a detection result C of a water quality monitor (4-4)₄Calculating Q₂. The calculation method is as follows:

in the present embodiment, the first and second electrodes are,calculated, Q₂/Q₁≤0.5。

And 5: the water discharged from the recycling system (4) enters a water supply system (1), the step 1 is repeated, and Q is calculated according to the formula 1₁96.3 ten thousand meters³. Compared with the embodiment 1, the method saves96.2 ten thousand meters³The original ecological water source.

Example 3

The difference from example 2 is that: detection result C of water quality monitoring instrument (4-4) in step 4₄Is composed ofCalculated, Q₂/Q₁≤0.8。

And 5: the water discharged from the recycling system (4) enters a water supply system (1), the step 1 is repeated, and Q is calculated according to the formula 1₁38.5 ten thousand meters³. Compared with the embodiment 1, the saving is 154.0 ten thousand meters³The original ecological water source.

Example 4

The difference from example 2 is that: detection result C of water quality monitoring instrument (4-4) in step 4₄Is composed ofCalculated, Q₂/Q₁≤0.3。

And 5: the water discharged from the recycling system (4) enters a water supply system (1), the step 1 is repeated, and Q is calculated according to the formula 1₁134.8 ten thousand m³. Compared with the embodiment 1, the saving is 57.7 ten thousand meters³The original ecological water source.

Example 5

Detection result C of water quality monitoring instrument (4-4) in step 4₄Is composed ofCalculated, Q₂/Q₁≤1。

And 5: the water discharged from the recycling system (4) enters a water supply system (1), the step 1 is repeated, and Q is calculated according to the formula 1₁0 ten thousand m³. Compared with the embodiment 1, the method completely adopts the recycled water source, and saves 192.5 ten thousand meters³The original ecological water source.