Wastewater treatment equipment for swimming crab seedling cultivation

Abstract

The invention discloses a wastewater treatment device for raising swimming crab seedlings, which relates to the technical field of wastewater treatment and comprises a separation tank. The invention facilitates breaking foam and flushing separated impurities by cooperating with a cleaning component and a sewage pipe, and facilitates producing foam to adsorb impurities and separate water and foam by cooperating with a foaming component and a separation component, thereby achieving the ability to purify water quality and ultimately solving the problem of a large amount of impurities remaining in the recovery pipe when existing equipment recycles foam. The invention determines the optimal amount of reagent dosage and cyclone separator power by analyzing historical data through a processing unit, and adjusts them according to the actual impurity content, thereby avoiding reagent waste and excessive equipment energy consumption. The invention accurately controls processing parameters, reduces the ineffective operation time of the equipment and unnecessary losses, extends the service life of the equipment, reduces the equipment maintenance cost, and achieves the rational use of resources and effective cost control while ensuring the wastewater treatment effect, thereby improving economic benefits.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, in particular to wastewater treatment equipment for breeding swimming crabs. Background Art

[0002] The swimming crab (Portunus trituberculatus) is an important marine aquaculture crab species in my country, widely distributed along the country's coast. Currently, traditional earthen pond farming is the main method of aquaculture for swimming crabs. This method significantly affects the aquaculture environment and makes water quality difficult to control. Long-term feeding and high-protein impurities such as excrement floating in the water not only consume dissolved oxygen in the water, causing hypoxia and affecting the crab's respiration, but also creates a breeding ground for harmful microorganisms such as bacteria and viruses. Therefore, equipment is needed to separate water and protein impurities, and protein separators based on the foam separation method are the preferred choice.

[0003] Existing skimmers typically use a pipeline structure to directly recover foam. However, due to the unstable shape of the foam, which easily breaks, a large amount of impurities accumulate in the recovery pipeline, which not only pollutes the equipment but also easily forms wastewater after the foam breaks. The wastewater then flows back into the separation equipment, affecting the separation quality.

[0004] Therefore, the present invention improves the existing equipment in view of the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a wastewater treatment device for raising swimming crab seedlings.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a wastewater treatment device for raising swimming crab seedlings, comprising a separation tank, the separation tank being a tank structure with a gradually narrowing top opening, a cleaning cover fixedly mounted at the top opening of the separation tank via a flange, the cleaning cover being made of transparent glass, a separation assembly being provided in the separation tank, a cleaning assembly being provided in the cleaning cover, and a foaming assembly being provided on the separation assembly;

[0007] The separation component includes a control module, which includes a collection unit, a processing unit and a regulation unit;

[0008] The collection unit detects the impurity content data before and after the impurities are removed from the sewage, collects the data on the amount of reagents added and the power of the spiral separation barrel, and transmits the collected data on the impurity content, reagent amount and power of the spiral separation barrel to the processing unit;

[0009] The processing unit processes the impurity content data before and after impurities are removed from the sewage to obtain the impurity removal rate. The impurity removal rate is then combined with the data on the dosage of the reagent and the power of the spiral separation barrel for analysis to determine the optimal dosage of the reagent and the power of the spiral separation barrel. The relationship between the dosage of the reagent and the power of the spiral separation barrel and the impurity content in the sewage is established. Based on the actual impurity content in the sewage, a dosage adjustment signal and a wind power adjustment signal are generated, and the dosage adjustment signal and the wind power adjustment signal are transmitted to the adjustment unit.

[0010] The steps for the processing unit to determine the optimal dosage of the reagent and the optimal power of the spiral separation barrel are as follows:

[0011] S1: There is a linear relationship between the preset impurity removal rate R and the reagent dosage x and the spiral separation barrel power y, R = β0 + β1*x + β2*y + ε, β0 is the basic impurity removal rate when no reagent is added and the separation barrel is running, β1 is the regression coefficient of the reagent dosage x, β2 is the regression coefficient of the spiral separation barrel power y, and ε is the error term;

[0012] S2: Retrieve n groups of data from the historical data of sewage treatment, substitute the data on impurity removal rate R, agent dosage x, and spiral separation barrel power y at the corresponding time point in the historical data into the linear relationship formula between impurity removal rate R, agent dosage x, and spiral separation barrel power y, and obtain the estimated value of impurity removal rate for the historical data. x i and y i They are the dosage of reagent and the power of spiral separation barrel for group i respectively. The actual impurity removal rate of group i is obtained based on historical data: R i , then the error of the i-th group of data is

[0013] S3: Sum of squared errors Calculate the partial derivatives of S(β0,β1,β2) with respect to β0, β1 and β2 respectively, and set them equal to zero. Calculate the partial derivative of β0 to obtain Taking the partial derivative of β1 we get Taking the partial derivative of β2 we get

[0014] S4: Solve the three partial derivative equations to obtain the estimated values ​​of β0, β1 and β2 and exist When the value reaches the maximum, it is determined that the dosage of the agent and the power of the spiral separation barrel are the best, which is recorded as x best and y best ;

[0015] The regulating unit receives the dosage regulating signal and the wind power regulating signal, and adjusts the dosage of the medicine and the power of the spiral separation barrel according to the calculated actual dosage and actual power.

[0016] Preferably, the separation component includes a water pump, which is installed and fixed on a mounting platform on one side of the separation tank. A flange connecting pipe is provided at the interface on the side of the water pump, and a water inlet pipe is fixed to the interface on the top surface of the water pump through a flange plate.

[0017] Preferably, the cleaning component includes a first electric valve, which is installed and fixed on the top of the water inlet pipe through a flange. The top surface of the first electric valve is connected to a cleaning pipe through a flange. The other end of the cleaning pipe passes through the top surface of the cleaning cover and is connected to a water spray pipe through a flange. The water spray pipe is an inverted U-shaped structure, and multiple nozzles are connected to the water spray pipe.

[0018] Preferably, the foaming component includes a foaming tube, which is a three-way elbow structure. One end of the foaming tube is connected to the side of the water inlet pipe through a flange, and the through hole on the side of the foaming tube is connected to the air inlet pipe through a flange. The other end of the air inlet pipe is connected to the third electric valve through a flange.

[0019] Preferably, the foaming tube is connected to the spiral separation barrel through a flange, the spiral separation barrel is fixed inside the separation tank, the lower end of the spiral separation barrel passes through the separation tank and is equipped with a second electric valve through a flange, and the top surface of the second electric valve is connected to a water outlet pipe.

[0020] Preferably, the bottom surface of the cleaning cover is sealed with the upper end of the spiral separation barrel, one side of the cleaning cover is connected to a sewage pipe, and the other end of the sewage pipe extends downward and is installed with a fourth electric valve.

[0021] Preferably, the processing unit performs the following steps to analyze the dosage of the medicine and the power adjustment of the spiral separation barrel:

[0022] M1: According to historical data analysis, the dosage of reagent x and the power of spiral separation barrel y are directly proportional to the impurity content z in sewage, and the proportional coefficients are k1 and k2 respectively. Impurity content data z when the value reaches the maximum best ;

[0023] M2: When the detection equipment detects the actual impurity content in the sewage, it can calculate the most suitable dosage of the reagent and the power of the spiral separation barrel according to the proportional coefficients k1 and k2. The difference between the most suitable dosage of the reagent and the actual dosage of the reagent is calculated to obtain the dosage adjustment amount; the difference between the most suitable power of the spiral separation barrel and the actual power of the spiral separation barrel is calculated to obtain the power adjustment amount of the spiral separation barrel:

[0024] M3: Generate a dosage adjustment signal and a wind power adjustment signal according to the dosage adjustment amount of the medicine and the power adjustment amount data of the spiral separation barrel, and transmit the dosage adjustment signal and the wind power adjustment signal to the adjustment unit.

[0025] Preferably, the processing unit performs the following steps to analyze the impurity content in the sewage:

[0026] N1: Use a known turbidity standard solution to calibrate the turbidity sensor and establish the corresponding relationship between the turbidity value and the electrical signal. The turbidity value of the sewage is T = a*I+b, where I is the intensity of the processed electrical signal received by the light detector, and a and b are the coefficients obtained through calibration;

[0027] N2: The turbidity value of the sewage is tested at set time intervals, and the mean A and standard deviation B of multiple turbidity values ​​detected at the same time are calculated. The data fluctuation range is set based on the calculated mean and standard deviation, and the fluctuation range is [A-2B, A+2B]. The turbidity value data detected at the same time that is not within the fluctuation range is marked as an outlier. After screening out the outliers, the mean of the remaining turbidity value data is calculated, and the mean of the remaining turbidity value data is used as the turbidity value of the currently tested sewage.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The cooperation of the cleaning component and the sewage pipe facilitates breaking the foam and flushing the separated impurities, thus improving practicality and achieving the ability to fully recover impurities and sewage. The cooperation of the foaming component and the separation component facilitates the production of foam to absorb impurities and separate water and foam, thus improving practicality and achieving the ability to purify water quality. Ultimately, the problem of a large amount of impurities remaining in the recovery pipe when the existing equipment recovers foam is solved.

[0030] 2. The processing unit analyzes historical data to determine the optimal dosage of reagents and the power of the spiral separation barrel, and adjusts them according to the actual impurity content, thus avoiding reagent waste and excessive equipment energy consumption. The precise control of treatment parameters reduces ineffective equipment operation time and unnecessary losses, extends equipment service life, and reduces equipment maintenance costs. While ensuring wastewater treatment results, it achieves rational resource utilization and effective cost control, thereby improving economic benefits.

[0031] 3. By using the turbidity sensor calibration to establish the relationship between the turbidity value and the electrical signal, and processing the turbidity data by calculating the mean and standard deviation, outliers are screened out to obtain accurate and stable sewage turbidity values, thereby ensuring the accuracy of the treatment unit decision-making, and thus ensuring the stable operation of the entire wastewater treatment process and the reliability of the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 This is a three-dimensional schematic diagram of the overall appearance of the device proposed in the present invention;

[0034] Figure 2 This is a front view schematic diagram of the overall appearance of the device proposed by the present invention;

[0035] Figure 3 This is a schematic back view of the overall appearance of the device proposed by the present invention;

[0036] Figure 4 This is a three-dimensional schematic diagram of the separation component structure proposed by the present invention;

[0037] Figure 5 This is a three-dimensional schematic diagram of the foaming component structure proposed by the present invention;

[0038] Figure 6 This is a schematic diagram of the internal structure of the spiral separation barrel proposed by the present invention;

[0039] Figure 7 This is a flow chart of the system proposed in the present invention.

[0040] Serial numbers in the figure: 1. Separation tank; 2. Cleaning cover; 3. Water pump; 4. Water inlet pipe; 5. First electric valve; 6. Cleaning pipe; 7. Water spray pipe; 8. Foaming pipe; 9. Spiral separation barrel; 10. Second electric valve; 11. Water outlet pipe; 12. Air inlet pipe; 13. Third electric valve; 14. Sewage pipe; 15. Fourth electric valve. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] Example: See Figure 1-7The present invention relates to a wastewater treatment device for raising swimming crab seedlings, comprising a separation tank 1. The separation tank 1 is a tank structure with a gradually narrowing top opening. A cleaning cover 2 is fixedly installed at the opening of the top surface of the separation tank 1 through a flange. The cleaning cover 2 is made of transparent glass material. A separation component is provided in the separation tank 1, and a cleaning component is provided in the cleaning cover 2. A foaming component is provided on the separation component. The modular design facilitates maintenance and upgrading of the device and improves practicality. The separation component comprises a water pump 3, which is fixed on a mounting platform on one side of the separation tank 1. A flange connecting pipe is provided at the interface on the side of the water pump 3, and a flange connecting pipe is provided at the interface on the top surface of the water pump 3. The flange is connected and fixed with an inlet pipe 4. Through the cooperation of the water pump 3 and the inlet pipe 4, it is convenient to extract the sewage in the breeding pond and transport it into the device, which improves practicality; the cleaning component includes a first electric valve 5, which is installed and fixed on the top of the water inlet pipe 4 through a flange. The top surface of the first electric valve 5 is connected to a cleaning pipe 6 through a flange. The other end of the cleaning pipe 6 passes through the top surface of the cleaning cover 2 and is connected to a water spray pipe 7 through a flange. The water spray pipe 7 is an inverted U-shaped structure. A plurality of nozzles are connected to the water spray pipe 7. Through the cooperation of the first electric valve 5 and the water spray pipe 7, it is convenient to break the foam and rinse the separated impurities, which improves practicality.

[0043] In the present invention, the foaming component includes a foaming tube 8, which is a three-way elbow structure. One end of the foaming tube 8 is connected to the side of the water inlet pipe 4 through a flange, and the through hole on the side of the foaming tube 8 is connected to the air inlet pipe 12 through a flange. The other end of the air inlet pipe 12 is connected to a third electric valve 13 through a flange. The cooperation of the third electric valve 13 and the air inlet pipe 12 facilitates the production of bubbles of mixed sewage and gas, thereby improving practicality; the foaming tube 8 is connected to the spiral separation barrel 9 through the flange, and the spiral separation barrel 9 is installed and fixed inside the separation tank 1. The spiral separation The lower end of the barrel 9 passes through the separation tank 1 and is equipped with a second electric valve 10 through a flange. The top surface of the second electric valve 10 is connected to a water outlet pipe 11. The cooperation between the second electric valve 10 and the water outlet pipe 11 facilitates the control of the water output of the device, thereby improving practicality. The bottom surface of the cleaning cover 2 is sealed with the upper end of the spiral separation barrel 9. One side of the cleaning cover 2 is connected to a sewage pipe 14. The other end of the sewage pipe 14 extends downward and is equipped with a fourth electric valve 15. The cooperation between the fourth electric valve 15 and the sewage pipe 14 facilitates the control of sewage discharge, thereby improving practicality.

[0044] The separation component includes a control module, which includes a collection unit, a processing unit and a regulation unit;

[0045] By adding a foam-generating agent into the sewage, the spiral separation barrel 9 then removes the foam floating on the sewage, separating the impurities contained in the foam from the sewage, thereby achieving the effect of purifying the water quality; there is a linear relationship between the preset impurity removal rate R and the agent dosage x and the power y of the spiral separation barrel 9, R = β0 + β1*x + β2*y + ε, where β0 is the basic impurity removal rate when no agent is added and the separation barrel is running, β1 is the regression coefficient of the agent dosage x, β2 is the regression coefficient of the power y of the spiral separation barrel 9, and ε is the error term;

[0046] Retrieve n groups of data from the historical data of sewage treatment, substitute the data on impurity removal rate R, agent dosage x and spiral separation barrel 9 power y at the corresponding time point in the historical data into the linear relationship formula between impurity removal rate R, agent dosage x and spiral separation barrel 9 power y, and obtain the estimated value of impurity removal rate for historical data x i and y i They are the dosage of the reagent for the i-th group of data and the power of the spiral separation barrel 9. According to the historical data, the actual impurity removal rate of the i-th group of data is R i , then the error of the i-th group of data is

[0047] In order to minimize the overall error of all data, we construct the sum of squared errors as the objective function, the sum of squared errors Calculate the partial derivatives of S(β0,β1,β2) with respect to i0, i1 and i2 respectively, and set them equal to zero. Calculate the partial derivative of i0 to obtain Taking the partial derivative of i1 we get Taking the partial derivative of i2 we get Solve the three partial derivative equations obtained to obtain the estimated values ​​corresponding to β0, β1 and β2 and exist When the value reaches the maximum, it is determined that the dosage of the medicine and the power of the spiral separation barrel 9 are the best, which is recorded as x best and y best ;

[0048] Through historical data analysis, it is found that the amount of reagent added x and the power y of the spiral separation barrel 9 are proportional to the impurity content z in the sewage. The proportional coefficients are k1 and k2 respectively. Impurity content data z when the value reaches the maximum bestWhen the detection equipment detects the actual impurity content in the sewage, it can calculate the most suitable amount of reagent dosage and the power of the spiral separation barrel 9 at this time according to the proportional coefficients k1 and k2, and adjust it according to the most suitable amount of reagent dosage and the power of the spiral separation barrel 9 at this time.

[0049] The turbidity sensor is calibrated using a standard solution of known turbidity to establish a corresponding relationship between turbidity values ​​and electrical signals. The sewage turbidity value is T = a*I+b, where I is the intensity of the processed electrical signal received by the light detector, and a and b are coefficients obtained through calibration. The turbidity sensor is then immersed in the sewage to be tested. The light emitted by the light source in the turbidity sensor propagates through the sewage. When it encounters suspended impurities, the light is scattered and absorbed. The light detector in the turbidity sensor receives the light signal after being affected by the sewage, converts the received light signal into an electrical signal, and records the electrical signal.

[0050] The turbidity value of the sewage is tested at set time intervals, and the mean A and standard deviation B of multiple turbidity values ​​detected at the same time are calculated. The data fluctuation range is set based on the calculated mean and standard deviation, and the fluctuation range is [A-2B, A+2B]. The turbidity value data detected at the same time that is not within the fluctuation range is marked as an outlier. After screening out the outliers, the mean of the remaining turbidity value data is calculated, and the mean of the remaining turbidity value data is used as the turbidity value of the currently tested sewage.

[0051] Working principle: When the present invention is used, first power on all electrical equipment, then connect the interface on the side of the water pump 3 to the connecting pipe of the aquaculture reservoir, and then start the water pump 3 through the controller. The water pump 3 first extracts sewage from the water reservoir, and then transports it into the foaming tube 8 through the water inlet pipe 4. At the same time, start the third electric valve 13 to control the appropriate amount of gas to enter the foaming tube 8 through the air inlet pipe 12. The sewage and gas are mixed and then enter the spiral separation barrel 9. After entering the spiral separation barrel 9, the mixed water will first collide with the inner wall of the spiral separation barrel 9, and then the spiral falls downward. At the same time, a large number of bubbles are generated in the water. The bubbles will absorb protein impurities in the water, and then concentrate to the middle of the spiral separation barrel 9 under the action of buoyancy. At this time, the heavier water clings to the inner wall of the spiral separation barrel 9 due to centrifugal force. On the inner wall of the barrel 9, the spiral motion of the fluid will drive the airflow in the middle of the separation cylinder 9 to form a reverse upward vortex, while the foam is concentrated in the middle and gradually moves upward under the action of the airflow vortex, thereby realizing the separation of water and foam. The separated clean water will enter the second electric valve 10 from the bottom of the spiral separation barrel 9, and then the water flow rate is controlled by adjusting the second electric valve 10, and then return to the water reservoir through the outlet pipe 11 to complete the water purification work. The foam will flow into the cleaning cover 2 from the top of the spiral separation barrel 9, and then start the first electric valve 5, and then a part of the water in the water inlet pipe 4 enters the cleaning pipe 6, and then enters the water spray pipe 7 and is sprayed out from the nozzle, thereby breaking the foam and washing impurities, and finally enters the fourth electric valve 15 through the sewage pipe 14, and the fourth electric valve 15 is started to control the water output, so as to achieve effective recovery of impurities;

[0052] Foam separation is based on the principle of adsorption, where bubbles are introduced into a liquid containing surfactant, causing the surfactant in the liquid to accumulate at the gas-liquid interface (the surface of the bubbles), forming a foam layer above the main body of the liquid. Separating the foam layer from the main liquid phase achieves the goal of concentrating the surfactant (in the foam layer) and purifying the main liquid phase. Cyclone separation technology uses an offset water inlet to form a vortex when the fluid enters the conical barrel. Under the centrifugal force, the heavier water clings to the inner wall of the conical barrel, simultaneously forming an updraft in the middle of the conical barrel, thereby driving the bubbles emerging from the water body upward. As the bubbles rise within the barrel, they are primarily engulfed by the airflow and rise synchronously as a whole, without squeezing each other and causing the bubbles to break. After losing the updraft, they move forward by being squeezed by the bubbles behind them. This squeezing process is prone to rupture. Any bubbles that are not squeezed and ruptured will burst under the action of the water sprayed from the water pipe 7, allowing the impurities contained in the bubbles to be recovered.

[0053] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A wastewater treatment device for raising swimming crab seedlings, comprising a separation tank (1), characterized in that: The separation tank (1) is a tank structure with a gradually narrowing top opening. A cleaning cover (2) is fixedly mounted on the top opening of the separation tank (1) via a flange. The cleaning cover (2) is made of transparent glass. A separation component is provided in the separation tank (1). A cleaning component is provided in the cleaning cover (2). A foaming component is provided on the separation component. The separation component includes a control module, which includes a collection unit, a processing unit and a regulation unit; The collecting unit detects the impurity content data before and after the impurities are removed from the sewage, collects the data on the amount of the reagent added and the power of the spiral separation barrel (9), and transmits the collected data on the impurity content, the amount of the reagent added and the power of the spiral separation barrel (9) to the processing unit; The processing unit processes the impurity content data before and after impurities are removed from the sewage to obtain the impurity removal rate, and then combines the impurity removal rate with the dosage of the reagent and the power data of the spiral separation barrel (9) for analysis to determine the optimal dosage of the reagent and the power of the spiral separation barrel (9); establishes the relationship between the dosage of the reagent and the power of the spiral separation barrel (9) and the impurity content in the sewage, generates a dosage adjustment signal and a wind power adjustment signal according to the actual impurity content in the sewage, and transmits the dosage adjustment signal and the wind power adjustment signal to the adjustment unit; The steps for the processing unit to determine the optimal dosage of the medicine and the optimal power of the spiral separation barrel (9) are as follows: S1: There is a linear relationship between the preset impurity removal rate R and the amount of reagent added x and the power y of the spiral separation barrel (9), R = β0 + β1*x + β2*y + ε, β0 is the basic impurity removal rate when no reagent is added and the separation barrel is running, β1 is the regression coefficient of the amount of reagent added x, β2 is the regression coefficient of the power y of the spiral separation barrel (9), and ε is the error term; S2: retrieve n groups of data from the historical data of sewage treatment, substitute the data on the impurity removal rate R, the amount of reagent added x and the power y of the spiral separation barrel (9) at the corresponding time point in the historical data into the linear relationship formula between the impurity removal rate R, the amount of reagent added x and the power y of the spiral separation barrel (9), and obtain the estimated value of the impurity removal rate for the historical data x i and y i The dosage of the reagent and the power of the spiral separation barrel (9) for the i-th group of data are respectively, and the actual impurity removal rate of the i-th group of data is obtained based on the historical data. i , then the error of the i-th group of data is S3: Sum of squared errors Calculate the partial derivatives of S(β0,β1,β2) with respect to β0, β1 and β2 respectively, and set them equal to zero. Calculate the partial derivative of β0 to obtain Taking the partial derivative of β1 we get Taking the partial derivative of β2 we get S4: Solve the three partial derivative equations to obtain the estimated values ​​of β0, β1 and β2 and exist When the value reaches the maximum, the dosage of the medicine and the power of the spiral separation barrel (9) are determined to be the best, which is recorded as x best and y best ; The regulating unit receives the dosage regulating signal and the wind power regulating signal, and adjusts the dosage of the medicine and the power of the spiral separation barrel (9) according to the calculated actual dosage and actual power.

2. The wastewater treatment equipment for raising swimming crab seedlings according to claim 1, characterized in that: The separation assembly comprises a water pump (3), which is mounted and fixed on a mounting platform on one side of the separation tank (1); a flange connection pipe is provided at an interface on the side of the water pump (3); and a water inlet pipe (4) is connected and fixed to an interface on the top surface of the water pump (3) via a flange.

3. The wastewater treatment equipment for raising swimming crab seedlings according to claim 1, characterized in that: The cleaning component comprises a first electric valve (5), which is fixed to the top of the water inlet pipe (4) via a flange, the top surface of the first electric valve (5) is connected to a cleaning pipe (6) via the flange, the other end of the cleaning pipe (6) passes through the top surface of the cleaning cover (2) and is connected to a water spray pipe (7) via the flange, the water spray pipe (7) is an inverted U-shaped structure, and a plurality of nozzles are connected to the water spray pipe (7).

4. The wastewater treatment equipment for raising swimming crab seedlings according to claim 1, characterized in that: The foaming component comprises a foaming tube (8), the foaming tube (8) being a three-way elbow structure, one end of the foaming tube (8) being connected to the side of the water inlet pipe (4) via a flange, the through hole on the side of the foaming tube (8) being connected to the air inlet pipe (12) via a flange, and the other end of the air inlet pipe (12) being connected to a third electric valve (13) via a flange.

5. The wastewater treatment equipment for raising swimming crab seedlings according to claim 4, characterized in that: The foaming tube (8) is connected to the spiral separation barrel (9) via a flange. The spiral separation barrel (9) is fixed inside the separation tank (1). The lower end of the spiral separation barrel (9) passes through the separation tank (1) and is installed with a second electric valve (10) via a flange. The top surface of the second electric valve (10) is connected to a water outlet pipe (11).

6. The wastewater treatment equipment for raising swimming crab seedlings according to claim 3, characterized in that: The bottom surface of the cleaning cover (2) is sealedly connected to the upper end of the spiral separation barrel (9); one side of the cleaning cover (2) is connected to a sewage pipe (14); the other end of the sewage pipe (14) extends downward and is equipped with a fourth electric valve (15).

7. The wastewater treatment equipment for raising swimming crab seedlings according to claim 1, characterized in that: The processing unit performs the following steps to analyze the amount of medicine added and the amount of power adjustment of the spiral separation barrel (9): M1: According to historical data analysis, the dosage of reagent x and the power y of the spiral separation barrel (9) are directly proportional to the impurity content z in the sewage. The proportional coefficients are k1 and k2 respectively. Impurity content data z when the value reaches the maximum best ; M2: When the detection device detects the actual impurity content in the sewage, it can calculate the most suitable dosage of the agent and the power of the spiral separation barrel (9) at this time according to the proportional coefficients k1 and k2, calculate the difference between the most suitable dosage of the agent and the actual dosage of the agent, and obtain the dosage adjustment amount; calculate the difference between the most suitable power of the spiral separation barrel (9) and the actual power of the spiral separation barrel (9), and obtain the power adjustment amount of the spiral separation barrel (9): M3: Generate a dosage adjustment signal and a wind power adjustment signal according to the dosage adjustment amount of the medicine and the power adjustment amount data of the spiral separation barrel (9), and transmit the dosage adjustment signal and the wind power adjustment signal to the adjustment unit.

8. The wastewater treatment equipment for raising swimming crab seedlings according to claim 1, characterized in that: The steps for analyzing the impurity content in sewage in the treatment unit are as follows: N1: Use a known turbidity standard solution to calibrate the turbidity sensor and establish the corresponding relationship between the turbidity value and the electrical signal. The turbidity value of the sewage is T = a*I+b, where I is the intensity of the processed electrical signal received by the light detector, and a and b are the coefficients obtained through calibration; N2: The turbidity value of the sewage is tested at set time intervals, and the mean A and standard deviation B of multiple turbidity values ​​detected at the same time are calculated. The data fluctuation range is set based on the calculated mean and standard deviation, and the fluctuation range is [A-2B, A+2B]. The turbidity value data detected at the same time that is not within the fluctuation range is marked as an outlier. After screening out the outliers, the mean of the remaining turbidity value data is calculated, and the mean of the remaining turbidity value data is used as the turbidity value of the currently tested sewage.

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