Wastewater treatment system suitable for irrigation

Abstract

The invention provides a wastewater treatment system suitable for irrigation, which comprises an adjusting tank and a sedimentation tank, the adjusting tank is provided with a conveying pipe for conveying water flow to the sedimentation tank, and the wastewater treatment system also comprises a medicament adding device which comprises a mixing cavity arranged on the conveying pipe, and the mixing cavity comprises a liquid inlet and a liquid outlet; a medicine adding plate is arranged between the liquid inlet and the liquid outlet in the mixing cavity, a plurality of medicine outlets are evenly formed in the face, close to the liquid outlet, of the medicine adding plate, a plurality of liquid guide holes are formed in the periphery of each medicine outlet, the liquid guide holes are evenly formed around the medicine outlets at intervals, and the medicine outlets are connected with a pneumatic medicine conveying device. By means of the arrangement mode, medicine adding is facilitated, medicine dust can be effectively prevented from diffusing in a workshop due to the fact that the medicine is directly added into the mixing cavity, the conveying amount of the pneumatic medicine conveying device can be controlled to correspond to the waste water flow, and therefore the proportion of the medicine to the waste water can be conveniently controlled, and operation is more convenient.

Description

Technical Field

[0001] The present invention generally relates to the technical field of wastewater treatment, and in particular to a wastewater treatment system suitable for irrigation. Background Art

[0002] At present, wastewater from aquaculture and life contains high concentrations of organic matter, COD and ammonia nitrogen. For this type of sewage, the commonly used treatment method is to filter, precipitate, denitrify and dephosphorize the wastewater, and then use the treated wastewater for irrigation. The filtered and precipitated substances can be used to make organic fertilizers, thereby effectively utilizing the wastewater.

[0003] In the prior art, a method for treating wastewater from aquaculture plants is provided, in which the wastewater is collected through a sewage collection tank, and then pumped to an equalization tank through a pumping device, and solids in the wastewater are filtered through a solid-liquid separator on the equalization tank, and the filtered wastewater is collected in the equalization tank, and the wastewater is subjected to a first sedimentation in the equalization tank, and then a flocculant is added to the wastewater in the equalization tank and pumped to a sedimentation tank, so that the wastewater is subjected to a second sedimentation, and then the precipitated wastewater is treated by a biofilm treatment technology, and then dephosphorized before use for irrigation.

[0004] However, at present, when dry dosing is performed, the chemicals must be added and mixed in a mixing tank, and when adding and dosing, the chemicals must be quantitatively taken according to the amount of wastewater, which is troublesome to take, and when adding, the drug powder causes a lot of dust in the dosing room and poor sanitary conditions. Summary of the invention

[0005] In view of the above problems, the present application provides a wastewater treatment system suitable for irrigation, which is used to at least partially solve the technical problems existing in the prior art.

[0006] The present invention provides a wastewater treatment system suitable for irrigation, comprising a regulating tank and a sedimentation tank, wherein the regulating tank is provided with a delivery pipe for delivering water to the sedimentation tank, and further comprising: The drug adding device comprises a mixing chamber arranged on the conveying pipe, the mixing chamber comprises a liquid inlet and a liquid outlet, a drug adding plate is arranged between the liquid inlet and the liquid outlet in the mixing chamber, a plurality of drug outlets are evenly arranged on the side of the drug adding plate close to the liquid outlet, a plurality of liquid guide holes are arranged around each of the drug outlets, and the plurality of liquid guide holes are evenly arranged around the drug outlets, and the drug outlets are connected to a pneumatic drug delivery device. Specifically, the pneumatic drug delivery device can supply powdered drugs to the drug adding plate, and the drugs can be dispersed better with the air flow, and then flow into the mixing chamber through the drug outlet, and when the wastewater passes through the mixing chamber, it is guided through the liquid guide hole and mixed with the drugs flowing out of the drug outlet, and then transported to the downstream sedimentation tank through the conveying pipe, so as to facilitate the addition of drugs, and because the drugs are directly added to the mixing chamber, the drug dust can be effectively prevented from spreading in the workshop, and the delivery amount of the pneumatic drug delivery device can be controlled to correspond to the wastewater flow, so as to facilitate the control of the ratio of drugs and wastewater, and the operation is more convenient.

[0007] Furthermore, the dosing plate is sealed with the inner circumference of the mixing chamber, the drug outlet is connected with a guide channel, the axes of the multiple liquid guide holes arranged around each drug outlet are arranged at an angle with the axis of the guide channel, and the extension line of the axis of each liquid guide hole in the direction of the drug outlet intersects with the extension line of the guide channel. Specifically, through this arrangement, the water flow passing through the liquid guide hole can pass through the drug powder flowing out of the drug outlet, and the water flow can achieve a better mixing effect after impacting the drug powder, so that the drug and wastewater are mixed more evenly.

[0008] Furthermore, the axis lines of the plurality of liquid guide holes corresponding to each drug outlet, extending in the direction of the drug outlet, intersect with the extension line of the guide channel at the same point. Specifically, this arrangement can achieve a better mixing effect of the drug and the water flow.

[0009] Furthermore, the pneumatic drug delivery device includes a drug storage tank, the drug storage tank is connected to an air source, a first control valve is provided between the air source and the drug storage tank, the drug outlet end of the drug storage tank is connected to the drug outlet, and the first control valve can control the opening according to the liquid flow in the delivery pipe. Specifically, the air flow is controlled according to the flow of wastewater by the first control valve, so that the greater the flow of wastewater, the greater the air flow, and thus the greater the air flow flowing into the drug storage tank, the greater the amount of medicine that can be delivered, so that the amount of medicine added can be automatically controlled according to the wastewater flow.

[0010] Further, the first control valve includes a valve body arranged on the delivery pipe, an impeller arranged on the delivery pipe and a drive shaft connected to the impeller, a valve channel and a mounting cavity arranged between the valve channel and the drive shaft are arranged in the valve body, and a valve stem is arranged in the valve channel; along the axial direction, a plurality of valve holes are arranged on the valve stem at intervals, two ventilation grooves are arranged on the side wall of the valve channel, and the two ventilation grooves are connected to the gas source and the medicine storage tank respectively, and the valve stem is connected to the drive shaft for driving the valve stem to move axially. Specifically, through this arrangement, the greater the wastewater flow rate, the faster the speed at which the impeller can be driven to rotate, so that the faster the rotation speed of the drive shaft is, the greater the displacement of the valve stem in the axial direction is, the more the number of valve holes overlapping with the two ventilation grooves is, the greater the opening of the first control valve is, and when the air pressure supplied by the air source is constant, the greater the opening of the first control valve is, the greater the air flow through the first control valve is.

[0011] Further, the axis of the valve channel is arranged parallel to the axis of the drive shaft, a rotating member is arranged coaxially with the drive shaft in the installation cavity, the rotating member is drivingly connected to the drive shaft, at least one guide groove is radially arranged on a surface of the rotating member facing the valve channel, an inertia member is arranged in the guide groove, a drive plate is arranged coaxially with the drive shaft on the end of the valve stem, an annular drive ramp is arranged coaxially on a surface of the drive plate facing the rotating member, the inertia member is provided with a drive end slidably matched with the drive ramp, and a first compression spring is arranged between the valve stem and the bottom of the valve channel. Specifically, through this arrangement, the driving inclined surface is abutted against the driving end under the elastic force of the first compression spring, and the inertia member is located at the end of the guide groove close to the center of the driving plate under the extrusion of the driving inclined surface. At this time, the number of valve holes connecting the two ventilation grooves is small. When the impeller is driven to rotate, the driving plate can be driven to rotate around its axis. The inertia member slides outward under the action of centrifugal force, thereby pushing the valve stem to squeeze the first compression spring to move through the driving inclined surface, thereby increasing the number of valve holes connecting the two ventilation grooves and increasing the opening of the first control valve. The faster the rotation speed of the impeller, the greater the centrifugal force of the inertia member, and the greater the displacement that can drive the valve stem to move, so that the opening of the first control valve is greater.

[0012] Furthermore, the valve stem and the drive plate are eccentrically arranged. Specifically, this arrangement can effectively prevent the valve stem from rotating around its axis.

[0013] Furthermore, a discharge port is provided at the bottom of the medicine storage tank, and a pneumatic control valve is provided at the discharge port. The pneumatic control valve includes a discharge valve channel connected to the discharge port and a control valve channel connected to a middle area of ​​the discharge valve channel. A connecting port connected to the air source is provided in the middle area of ​​the control valve channel. A valve member is guided in the control valve channel, and a driving rod is connected to the valve member for driving. The driving rod can drive the valve member to move in the control valve channel. The other end of the discharge valve channel is connected to a plurality of the medicine discharge ports. Specifically, through the pneumatic control valve, the driving rod can drive the valve member to reciprocate, so that the valve member reciprocates through the connecting port, and the greater the amount of air supplied to the medicine storage tank, the faster the frequency of the driving rod driving the valve member to reciprocate. When the valve member is in the second position between the connecting port and the discharge valve channel, the airflow does not flow into the discharge valve channel. At this time, the medicine inside the medicine storage tank flows down to the discharge valve channel. When the valve member moves to the side of the connecting port away from the discharge valve channel, the airflow can flow into the discharge valve channel and drive the powdered medicine to flow out of the discharge valve channel to be transported to the dosing plate and out of the medicine outlet. The faster the movement frequency of the valve member, the faster the speed of transporting the medicine.

[0014] Furthermore, a mixing tube is arranged between the other end of the discharge valve channel and the plurality of drug outlets, the other end of the discharge valve channel is connected to the middle area of ​​the mixing tube, the plurality of drug outlets are connected to one end of the mixing tube, and a discharge port is also arranged at the end of the control valve channel away from the discharge valve channel, the discharge port is connected to the other end of the mixing tube, the driving rod can drive the valve member to move between a first position and a second position, the first position being a position in which the valve member covers the discharge port, and the second position being a position in which the valve member is between an end of the control valve channel close to the discharge valve channel and the connecting port. Specifically, a mixing tube is provided, a discharge port is provided at the end of the control valve channel, one end of the mixing tube is connected to the discharge port, and the discharge valve channel is connected to the middle area of ​​the mixing tube, so that the medicine can enter the mixing tube with the airflow for preliminary mixing, and then the valve member reciprocates to enable the airflow to flow into the interior of the mixing tube from the discharge port in a pulsed manner, and the airflow and medicine can also flow into the mixing tube in a pulsed manner through the discharge valve channel, and the airflow flowing into the mixing tube from the discharge port can impact the powdered medicine and airflow entering the mixing tube from the middle area, so that the medicine is more dispersed, thereby making the medicine and the airflow mixed more evenly, and thereby making the medicine and the water flow mixed more evenly.

[0015] Furthermore, a rigid gas pipe is vertically arranged in the medicine storage tank, the upper end of the gas pipe is close to the tank top of the medicine storage tank, the top of the medicine storage tank is connected to the gas source, and the lower end of the gas pipe is connected to the connecting port. Specifically, through this arrangement, a certain air pressure can be maintained inside the medicine storage tank, so that when the connecting port is connected to the discharge valve channel, the air flow will not flow out from the discharge port, thereby ensuring effective drug delivery to the dosing plate.

[0016] Beneficial Effects The present invention provides a wastewater treatment system suitable for irrigation, comprising a regulating tank and a sedimentation tank, wherein the regulating tank is provided with a delivery pipe for delivering water to the sedimentation tank, and further comprising: The drug adding device comprises a mixing chamber arranged on the conveying pipe, the mixing chamber comprises a liquid inlet and a liquid outlet, a drug adding plate is arranged between the liquid inlet and the liquid outlet in the mixing chamber, a plurality of drug outlets are evenly arranged on the side of the drug adding plate close to the liquid outlet, a plurality of liquid guide holes are arranged around each of the drug outlets, and the plurality of liquid guide holes are evenly arranged around the drug outlets, and the drug outlets are connected to a pneumatic drug delivery device. Specifically, the pneumatic drug delivery device can supply powdered drugs to the drug adding plate, and the drugs can be dispersed better with the air flow, and then flow into the mixing chamber through the drug outlet, and when the wastewater passes through the mixing chamber, it is guided through the liquid guide hole and mixed with the drugs flowing out of the drug outlet, and then transported to the downstream sedimentation tank through the conveying pipe, so as to facilitate the addition of drugs, and because the drugs are directly added to the mixing chamber, the drug dust can be effectively prevented from spreading in the workshop, and the delivery amount of the pneumatic drug delivery device can be controlled to correspond to the wastewater flow, so as to facilitate the control of the ratio of drugs and wastewater, and the operation is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0018] Figure 1 A schematic structural diagram of a wastewater treatment system suitable for irrigation provided by the present invention.

[0019] Figure 2 A schematic diagram of the partial structure of a reagent adding device in a wastewater treatment system suitable for irrigation provided by the present invention.

[0020] Figure 3 for Figure 2 The diagram shows a partially enlarged structural diagram of point A in a wastewater treatment system suitable for irrigation provided by the present invention.

[0021] Figure 4 for Figure 2 The diagram shows a partially enlarged structural diagram of point C in a wastewater treatment system suitable for irrigation provided by the present invention.

[0022] Figure 5 for Figure 2 The diagram shows a partially enlarged structural diagram of point B in a wastewater treatment system suitable for irrigation provided by the present invention.

[0023] Figure 6 for Figure 5The diagram shows a partially enlarged structural diagram of B-1 in a wastewater treatment system suitable for irrigation provided by the present invention.

[0024] Figure 7 A schematic structural diagram of a driving device for a driving rod in a wastewater treatment system suitable for irrigation provided by the present invention.

[0025] Figure 8 for Figure 7 The figure shows a schematic diagram of the local enlarged structure at D in a wastewater treatment system suitable for irrigation provided by the present invention.

[0026] Fig. 9 for Figure 7 The diagram shows a partially enlarged structural diagram of a wastewater treatment system suitable for irrigation provided by the present invention at point E. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] The present invention provides a wastewater treatment system suitable for irrigation. As a specific implementation method, refer to Figure 1 , Figure 2 The system comprises a regulating tank 1 and a sedimentation tank 2, wherein the regulating tank 1 is provided with a delivery pipe 11 for delivering water to the sedimentation tank, and further comprises: The drug adding device 3 includes a mixing chamber 31 arranged on the delivery tube 11. The mixing chamber 31 includes a liquid inlet 310 and a liquid outlet 311. A drug adding plate 32 is arranged between the liquid inlet 310 and the liquid outlet 311 in the mixing chamber 31. A plurality of drug outlets 320 are evenly arranged on a surface of the drug adding plate 32 close to the liquid outlet. A plurality of liquid guide holes 321 are arranged around each of the drug outlets 320. The plurality of liquid guide holes 321 are evenly spaced around the drug outlet 320. The drug outlet 320 is connected to a pneumatic drug delivery device 33.

[0030] Specifically, refer to Figure 1 , Figure 2The regulating tank 1 and the sedimentation tank 2 are consistent with the structure and use method in the prior art, and will not be repeated here. The difference from the prior art is that a delivery pipe 11 is provided on the regulating tank 1, and a water pump 10 is provided on the delivery pipe for pumping the wastewater in the regulating tank to the sedimentation tank. Figure 2 The downstream delivery pipe of the water pump is provided with an upper shell and a lower shell, the dosing plate 32 is arranged between the upper shell and the lower shell, and is fixedly connected by a screw, a mixing chamber is formed between the upper shell and the lower shell, the lower shell is connected to the water pump, and the upper shell is connected to a delivery pipe 11 at one end, so that when the water pump supplies wastewater, the water flow can flow through the liquid guide hole 321 on the dosing plate 32 to the other side of the dosing plate, at this time, the powdered medicine is supplied to the dosing plate 32 through the pneumatic drug delivery device 33, and the medicine is dispersed after being dispersed with the flow of the airflow, and then flows out through the drug outlet 320 The wastewater enters the mixing chamber 31. When the wastewater passes through the mixing chamber, it is guided by the liquid guide hole 321 and mixed with the medicine flowing out of the medicine outlet 320. Then, it is transported to the sedimentation tank downstream through the delivery pipe 11, so as to facilitate the addition of the medicine. Since the medicine is directly added to the mixing chamber, it can effectively prevent the medicine dust from spreading in the workshop, and the delivery amount of the pneumatic drug delivery device 33 can be controlled to correspond to the wastewater flow rate, so as to facilitate the control of the ratio of the medicine and the wastewater, and the operation is more convenient. The specific structure of the pneumatic drug delivery device and its use method are referred to below.

[0031] Furthermore, the dosing plate 32 is sealed with the inner circumferential surface of the mixing chamber 31, the drug outlet 320 is connected to the guide channel 320a, the axes of the multiple liquid guide holes 321 arranged around each of the drug outlets 320 are arranged at an angle to the axis of the guide channel 320a, and the extension line of the axis of each of the liquid guide holes 321 in the direction of the drug outlet intersects with the extension line of the guide channel 320a.

[0032] Specifically, refer to Figure 2 The dosing plate 32 is arranged between the upper shell and the lower shell, and is detachably fixedly connected by bolts, so that the dosing plate is sealed with the upper shell and the lower shell, and is sealed with the inner circumferential surface of the mixing chamber 31. Through this arrangement, the water flow passing through the liquid guide hole 321 can pass through the powder flowing out of the drug outlet, and the water flow can achieve a better mixing effect after impacting the powder, so that the medicine and wastewater are mixed more evenly.

[0033] Further, as a specific implementation method, refer to Figure 3 The axis lines of the plurality of liquid guide holes 321 corresponding to each drug outlet, and the extension lines toward the drug outlet, intersect with the extension line of the guide channel 320a at the same point.

[0034] Specifically, refer to Figure 4The drug outlet is arranged on the upper surface of the drug adding plate, the drug adding plate is arranged horizontally, the drug outlet is connected to a vertically arranged guide channel 320a, the guide channel is connected to the pneumatic drug delivery device, a plurality of liquid guide holes 321 are arranged evenly spaced around the drug outlet, and the liquid guide holes are inclined from top to bottom away from the drug outlet, and the extension lines of the drug outlet direction intersect with the extension lines of the guide channel 320a at the same point. This arrangement can achieve a better mixing effect of the medicine and the water flow.

[0035] Further, as a specific implementation method, refer to Figure 2 The pneumatic drug delivery device 33 includes a drug storage tank 332, and the drug storage tank 332 is connected to an air source 331. A first control valve 334 is provided between the air source 331 and the drug storage tank 332. The drug outlet end 3331 of the drug storage tank 332 is connected to the drug outlet 320, and the first control valve 334 can control the opening according to the liquid flow in the delivery pipe 11.

[0036] Specifically, the gas source 331 is a device capable of supplying gas at a constant pressure value, which can be an air pump or a gas storage tank. The first control valve 334 is arranged on the outer wall of the delivery pipe 111, and is used to adjust the opening according to the size of the water flow inside the delivery pipe 111. The gas source 331 is connected to the first control valve 334 through the first gas delivery pipe 3310, and the first control valve 334 is connected to the medicine storage tank 332 through the second gas delivery pipe 3340. The medicine storage tank is connected to the dosing plate through the mixing pipe 3320. When the water flow in the delivery pipe 11 increases, the opening of the first control valve increases, and the water flow through the first The air flow delivered to the medicine storage tank 332 by the control valve increases, and vice versa, the opening of the first control valve decreases, then the air flow delivered to the medicine storage tank 332 through the first control valve decreases, and the air flow is controlled by the first control valve according to the flow rate of wastewater, so that the greater the flow rate of wastewater, the greater the air flow, and thus the greater the air flow flowing into the medicine storage tank. When the air flow delivered to the medicine storage tank increases, the amount of medicine that can be delivered also increases, and vice versa, the amount of medicine decreases, so that the amount of medicine added can be automatically controlled according to the wastewater flow rate. The specific structure and method of controlling the amount of medicine in the medicine storage tank 332 to increase or decrease is referred to below.

[0037] Further, refer to Figure 2 , Figure 3As a specific implementation, the specific structure of the first control valve is as follows: the first control valve 334 includes a valve body 3341 arranged on the delivery pipe 11, an impeller 3342 arranged on the delivery pipe 1 and a driving shaft 3343 drivingly connected to the impeller, a valve channel 334b ​​and a mounting cavity 334a arranged between the valve channel and the driving shaft 3343 are arranged in the valve body 3341, and a valve stem 334c is arranged in the valve channel 334b; along the axial direction, a plurality of valve holes 334c-1 are arranged at intervals on the valve stem, and two ventilation grooves 334b-1 are correspondingly arranged on the side wall of the valve channel 334b, and the two ventilation grooves are respectively connected to the air source and the medicine storage tank, and the valve stem 334b ​​is drivingly connected to the driving shaft 3343, so as to drive the valve stem to move axially.

[0038] Specifically, the valve body is detachably fixedly arranged on the delivery pipe 11, the driving shaft of the impeller is rotatably arranged on the side wall of the delivery pipe 11, the valve channel 334b ​​is arranged on the valve body 3341, the ventilation groove 334b-1 is a long strip groove arranged along the axial direction of the valve channel, one ventilation groove is connected to the first air delivery pipe 3310, and the other ventilation groove is connected to the second air delivery pipe 3340, refer to Figure 3 , this is a schematic diagram of the state of the first control valve when the drive shaft is not rotating. At this time, only one valve hole is connected to the two ventilation grooves, so the air flow can only flow through one valve hole. When the impeller rotates, the valve stem can be driven to move by the drive shaft, so that the number of valve holes connecting the two ventilation grooves increases, and the opening of the first control valve is increased. Through this setting, the greater the wastewater flow rate, the faster the impeller 3342 can be driven to rotate, so that the drive shaft rotates faster. The faster the drive shaft rotates, the greater the axial displacement of the valve stem can be pushed, and the more valve holes 334c-1 overlap with the two ventilation grooves 334b-1, the larger the opening of the first control valve. When the air pressure supplied by the air source is constant, the larger the opening of the first control valve, the greater the air flow rate passing through the first control valve.

[0039] Further, as a specific implementation, the driving method of the drive shaft 3343 and the valve stem 334c is as follows: the axis of the valve channel 334b ​​is arranged parallel to the axis of the drive shaft, a rotating member 3344 is arranged coaxially with the drive shaft in the installation cavity, the rotating member is drivingly connected to the drive shaft, at least one guide groove 33441 is radially arranged on the side of the rotating member facing the valve channel, an inertia member 3345 is arranged in the guide groove, a drive plate 3346 is coaxially arranged on the end of the valve stem 334c and the drive shaft 3343, a ring-shaped drive bevel 3347 is coaxially arranged on the side of the drive plate facing the rotating member 3344, the inertia member 3345 is provided with a drive end 3345-1 that slides with the drive bevel 3347, and a first compression spring 3348 is arranged between the valve stem and the bottom of the valve channel.

[0040] Specifically, the guide groove can be a T-slot, refer to Figure 3 The rotating member 3344 is rotatably arranged inside the installation cavity 334a, and a plug-in hole is arranged on the rotating member, a plug-in key slot is arranged on the side wall of the plug-in hole, and a plug-in key is arranged on the outer peripheral surface of the driving rod, so that the rotating member and the driving rod are plug-in transmission matched. Through this arrangement, under the elastic force of the first compression spring 3348, the driving inclined surface 3347 is abutted against the driving end 3345-1, and under the extrusion of the driving inclined surface 3347, the inertial member is located at the end of the guide groove 33441 close to the center of the driving plate. At this time, the number of valve holes 334c-1 connecting the two ventilation grooves 334b-1 is small, and when the impeller is driven to rotate, the driving plate 3346 can be driven to rotate. Its axis rotates, and the inertial member slides outward under the action of centrifugal force, thereby pushing the valve stem to squeeze the first compression spring through the driving inclined surface 3347, thereby increasing the number of valve holes 334c-1 connecting the two ventilation grooves 334b-1, and increasing the opening of the first control valve. The faster the impeller rotates, the greater the centrifugal force of the inertial member, and the greater the displacement that can drive the valve stem to move, so that the opening of the first control valve is larger. When the rotation speed of the drive shaft decreases, the centrifugal force of the inertial member becomes smaller, and the inertial member slides toward the center of the circle under the action of the elastic force of the first compression spring, so that the valve stem moves in the direction close to the rotating member, and the opening of the first control valve is reduced.

[0041] Further, as a preferred embodiment, refer to Figure 3, the valve stem and the driving plate 3346 are eccentrically arranged. Specifically, it can be understood that when the rotating member rotates, there is friction between the driving end 3345-1 and the driving inclined surface, so there is a tendency to drive the driving plate to rotate around its axis, and when the valve stem rotates, the two ventilation grooves 334b-1 and the valve hole 334c-1 are misaligned. By eccentrically arranging the valve stem and the driving plate, the valve stem and the driving inclined surface are eccentrically arranged, which can effectively prevent the valve stem from rotating around its axis and ensure that the ventilation groove corresponds to the valve hole.

[0042] Further, as a specific implementation method, refer to Figure 5-Figure 9 The connection mode between the medicine storage tank and the gas source is as follows: a discharge port 3321 is arranged at the bottom of the medicine storage tank 332, and a pneumatic control valve 333 is arranged at the discharge port. The pneumatic control valve includes a discharge valve channel 3331 connected with the discharge port 3321, and a control valve channel 3332 connected with the middle area of ​​the discharge valve channel 3331, and a connecting port 33320 connected with the gas source 331 is arranged in the middle area of ​​the control valve channel 3332. A valve member 3333 is arranged in the guide of the control valve channel 3332, and a driving rod 335 is connected to the driving rod 335, and the driving rod 335 can drive the valve member 3333 to move in the control valve channel 3332, and the other end of the discharge valve channel 3331 is connected with a plurality of the medicine discharge ports 320.

[0043] Specifically, the medicine storage tank 332 is vertically arranged, and a discharge port 3321 is provided at the bottom, and a pneumatic control valve 333 is detachably fixedly provided at the lower end, wherein the driving rod 335 can drive the valve member to reciprocate, so that the valve member reciprocates through the connecting port 33320, and the greater the amount of air supplied to the medicine storage tank, the faster the frequency of the driving rod driving the valve member to reciprocate. When the valve member is in the second position between the connecting port and the discharge valve channel, the airflow does not flow into the discharge valve channel. At this time, the medicine inside the medicine storage tank flows down to the discharge valve channel. When the valve member moves to the side of the connecting port away from the discharge valve channel, the airflow can flow into the discharge valve channel, and drive the powdered medicine to flow out of the discharge valve channel to be transported to the dosing plate 32 and out of the medicine outlet, and as the movement frequency of the valve member is faster, the speed of transporting the medicine is also faster.

[0044] Furthermore, a mixing tube 336 is arranged between the other end of the discharge valve channel 3331 and the plurality of drug outlets 320, the other end of the discharge valve channel 3331 is connected to the middle area of ​​the mixing tube 336, the plurality of drug outlets 320 are connected to one end of the mixing tube 336, the control valve channel 3332 is further provided with a discharge port 33321 at the end away from the discharge valve channel 3331, the discharge port 33321 is connected to the other end of the mixing tube 336, the driving rod 335 can drive the valve member 3333 to move between a first position and a second position, the first position being a position where the valve member blocks the discharge port 33321, and the second position being a position where the valve member is between an end of the control valve channel 3332 close to the discharge valve channel 3331 and the connecting port 33320.

[0045] Specifically, the driving rod 335 is connected to a driving device, which includes a cylindrical shell 3351 detachably fixedly connected to the valve body of the pneumatic control valve, and an end cover 3352 arranged at the end of the cylindrical shell. The axis of the inner cavity of the cylindrical shell is parallel to the axis of the driving rod. An air inlet 33581 is arranged on the side wall of one end of the inner cavity of the cylindrical shell close to the driving rod. The air inlet 33581 is connected to the second air supply pipe 3340 through the first branch pipe 33410. The end cover 3352 is provided with an air outlet, which is connected to the connecting port 33320 through the third air supply pipe 3330. Between the air inlet and the air outlet, a first limiting surface 3351-1 and a second limiting surface 3351-2 are arranged opposite to each other in the cylindrical shell. A first piston 3353 is provided in the inner cavity of the cylindrical shell between the limiting surface 3352-1, the first limiting surface and the second limiting surface for guiding and sliding. A first through hole 33531 is provided on the first piston 3353. The first piston 3353 is connected with the driving rod 335. A second compression spring 3354 is provided between the cover body and the first piston 3353. When the piston plate abuts against the first limiting surface under the elastic force of the second compression spring, the valve member 3333 is in the second position. When the piston plate 3353 is in contact with the second limiting surface, the driving rod drives the valve member 3333 to be in the first position. A valve body assembly is provided in the side walls of the cylindrical shell and the end cover. The valve body assembly includes a guide arranged on the first The first switching rod 335112 on the first limiting surface and the second switching rod 33594 guided on the second limiting surface can squeeze the first switching rod to open the valve body assembly when the piston plate contacts the first limiting surface. At this time, the air flow can flow into the cylindrical outer shell through the first branch pipe 33410, and part of the gas flows through the first through hole 33531 and flows out from the third gas pipe 3330. However, the flow area of ​​the air inlet is larger than the flow area of ​​the first through hole. Therefore, an air pressure difference can be generated on both sides of the first piston, so that the first piston 3353 is pushed to resist the elastic force of the second compression spring under the action of the air pressure. When the first piston moves to contact the second limiting surface, the push The second switching rod 33594 is moved to switch the valve body assembly to a closed state, so that the airflow in the third air supply pipe cannot flow into the interior of the cylindrical shell, and the gas on the side of the first piston close to the driving rod in the cylindrical shell flows through the first through hole 33531, reducing the air pressure difference on both sides of the piston plate, and under the elastic force of the second compression spring, the first piston is pushed back to the position in contact with the first limit surface, and the first switching rod is pushed to switch the valve body assembly to an open state again, and so on and so forth to achieve the purpose of reciprocating drive, and the larger the opening of the first control valve, the greater the air flow supplied to the driving device, the faster the frequency of the reciprocating motion of the first piston can be driven, and the greater the amount of medicine that can be delivered.

[0046] Specifically, refer to Figure 8 , Fig. 9The valve body assembly includes a first piston chamber 3358 arranged in the side wall of the cylindrical shell and parallel to the axis of the inner cavity of the cylindrical shell, and a first guide hole 33583 arranged at one end of the piston chamber close to the first limiting surface and eccentrically arranged with the first piston chamber, the first switching rod guide is arranged in the first guide hole, a second valve stem 33511 is arranged in the first piston chamber 3358, the second valve stem and the first switching rod 335112 are arranged integrally, an end plate 33584 is sealed at the other end of the first piston chamber, a first connecting port 33582 is arranged at one end of the first piston chamber close to the end plate, a second valve hole 33585 connecting to the inner cavity of the cylindrical shell is arranged on the side wall of the first piston chamber, a connecting flow channel 335110 and a connecting port 335111 connected to the connecting flow channel are arranged in the second valve stem, and a first connecting air channel 33585 connecting to the inner cavity of the cylindrical shell is arranged at one end of the first piston chamber close to the first limiting surface, refer to Fig. 9 The valve body assembly also includes a second piston chamber 3359 arranged on the side wall of the end cover 3352, a second guide hole is arranged at the end of the second piston chamber, and the second switch rod guide is arranged in the second guide hole. A second end plug 33592 is sealed at one end of the second piston chamber away from the second limiting surface, and a movable block 33593 is arranged in the second piston chamber guide. The columnar block is integrally arranged with the second switching rod, and the outer circumferential surface of the columnar block is sealed and matched with the inner circumferential surface of the second piston chamber and has sliding friction. A third connecting airway 33591 connected to the atmosphere is arranged at one end of the second piston chamber close to the second limiting surface, and a second connecting port 33590 is arranged on the side wall of the other end. The second connecting port and the first connecting port are connected through a rigid tube 3357, and the connecting tube, the second piston chamber is located in the area where the movable block 33593 is away from the second limiting surface, and the first piston chamber is located in the area where the second valve stem 33511 is away from the first limiting surface are all filled with flowing hydraulic medium. Figure 8 , Fig. 9 When the first piston 3353 contacts the first limit surface 3351-1, the first switching rod 335112 is pushed to make the end of the second valve rod contact the end plate 33584. At this time, the second valve hole 33585 corresponds to the connecting flow channel 335110. At this time, the airflow in the first branch pipe 33410 can enter the inner cavity of the cylindrical shell 3351 through the second valve hole. Fig. 9At this time, the second switching rod is in a state of extending out of the second limit surface. At this time, the valve body assembly is in an open state. When the first piston 3353 moves to contact the second limit surface 3352-1, it can push the second switching rod to move, squeeze the movable block 33593 to move, so that the flowing hydraulic medium in the second piston chamber flows into the first piston chamber through the rigid tube 3357, thereby pushing the second valve stem to move, pushing the end of the first switching rod to extend out of the first limit surface, and making the second valve hole 33585 and the connecting flow channel 335110 staggered, switching to a closed state, and maintaining the current closed state under the friction between the movable block 33593 and the side wall of the second piston chamber, thereby achieving the purpose of reciprocating switching.

[0047] refer to Figure 5 One end of the mixing tube is connected to the drug outlet provided in the dosing plate, and the other end is provided with a feed pipe 3362. The discharge port 33321 is connected to the feed pipe 3362 through the second branch pipe 3363, and the discharge valve channel 3331 is connected to the middle area of ​​the mixing tube through the fourth branch pipe 3361. By setting the mixing tube, a discharge port is set at the end of the control valve channel, so that one end of the mixing tube is connected to the discharge port, and the discharge valve channel is connected to the middle area of ​​the mixing tube, so that the medicine can enter the mixing tube with the airflow for preliminary mixing, and then the valve member reciprocates to enable the airflow to flow into the inside of the mixing tube from the discharge port in a pulsed manner. The airflow and the medicine can also flow into the mixing tube in a pulsed manner through the discharge valve channel. The airflow flowing into the mixing tube from the discharge port can impact the powdered medicine and the airflow entering the mixing tube from the middle area, so that the medicine is more dispersed, thereby making the medicine and the airflow mixed more evenly, and thereby making the medicine and the water flow mixed more evenly.

[0048] Further, refer to Figure 5 A third branch pipe 33411 may be further provided between the second air supply pipe 3340 and the feed pipe 3362. The flow area of ​​the third branch pipe 33411 is smaller than the flow area of ​​the first through hole 33531. Through this arrangement, on the one hand, sufficient airflow can be supplied to the driving device, and when the valve body assembly is closed, part of the airflow can flow from the third branch pipe 33411 into the mixing tube, and the airflow is also a pulsed airflow, which improves the mixing effect in the mixing tube.

[0049] Further, as a specific implementation method, refer to Figure 5 , Figure 6A rigid gas pipe 337 is vertically arranged in the medicine storage tank 332, the upper end of the gas pipe 337 is close to the tank top of the medicine storage tank 332, the top of the medicine storage tank is connected to the gas source, and the lower end of the gas pipe 337 is connected to the connecting port 33320. Specifically, through this arrangement, a certain air pressure can be maintained inside the medicine storage tank, so that when the connecting port 33320 is connected to the discharge valve channel, the air flow will not flow out from the discharge port 3321, thereby ensuring effective drug delivery to the dosing plate.

[0050] Preferably, reference Figure 5 A counterweight plate 3371 is slidably arranged in the medicine storage tank, and the outer circumference of the counterweight plate is slidably and sealedly matched with the inner circumference of the medicine storage tank, and is sleeved on the air supply pipe 337. The powdered medicine is arranged under the counterweight plate 3371. Through this arrangement, it is possible to better prevent the airflow from entering the medicine storage tank from the discharge port 3321.

[0051] It should be noted that a vibration generator can be set on the outer wall of the medicine storage tank near the discharge port to provide vibration for the side wall of the medicine storage tank, thereby facilitating the powdered medicine to flow out of the discharge port 3321, wherein the vibration generator adopts any one of the existing technologies.

[0052] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A wastewater treatment system suitable for irrigation, comprising a regulating tank (1) and a sedimentation tank (2), wherein the regulating tank (1) is provided with a delivery pipe (11) for delivering water to the sedimentation tank, characterized in that: Also includes: The drug adding device (3) comprises a mixing chamber (31) arranged on the delivery tube (11); the mixing chamber (31) comprises a liquid inlet (310) and a liquid outlet (311); a drug adding plate (32) is arranged between the liquid inlet (310) and the liquid outlet (311) in the mixing chamber (31); a plurality of drug outlets (320) are evenly arranged on a surface of the drug adding plate (32) close to the liquid outlet; a plurality of liquid guide holes (321) are arranged around each of the drug outlets (320); the plurality of liquid guide holes (321) are evenly spaced around the drug outlet (320); and the drug outlet (320) is connected to a pneumatic drug delivery device (33).

2. A wastewater treatment system suitable for irrigation according to claim 1, characterized in that: The drug adding plate (32) is sealed with the inner circumferential surface of the mixing chamber (31); the drug outlet (320) is connected to a guide flow channel (320a); the axes of the plurality of liquid guide holes (321) arranged around each drug outlet (320) are arranged at an angle to the axis of the guide flow channel (320a); and the extension line of the axis of each liquid guide hole (321) in the direction of the drug outlet intersects with the extension line of the guide flow channel (320a).

3. A wastewater treatment system suitable for irrigation according to claim 2, characterized in that: The axis lines of the plurality of liquid guide holes (321) corresponding to each of the drug outlets, the extension lines in the direction of the drug outlets, intersect with the extension line of the guide flow channel (320a) at the same point.

4. A wastewater treatment system suitable for irrigation according to claim 2, characterized in that: The pneumatic drug delivery device (33) comprises a drug storage tank (332), the drug storage tank (332) being connected to an air source (331), a first control valve (334) being provided between the air source (331) and the drug storage tank (332), a drug outlet end (3331) of the drug storage tank (332) being connected to the drug outlet (320), and the first control valve (334) being capable of controlling the opening according to the liquid flow rate in the delivery pipe (11).

5. A wastewater treatment system suitable for irrigation according to claim 4, characterized in that: The first control valve (334) comprises a valve body (3341) arranged on the delivery pipe (1), an impeller (3342) arranged on the delivery pipe (1), and a drive shaft (3343) drivingly connected to the impeller; a valve channel (334b) and a mounting cavity (334a) arranged between the valve channel and the drive shaft (3343) are arranged in the valve body (3341); a valve stem (334c) is arranged in the valve channel (334b); a plurality of valve holes (334c-1) are arranged at intervals on the valve stem in the axial direction; two ventilation grooves (334b-1) are correspondingly arranged on the side wall of the valve channel (334b); the two ventilation grooves are respectively connected to the air source and the medicine storage tank; the valve stem (334b) is drivingly connected to the drive shaft (3343) for driving the valve stem to move in the axial direction.

6. A wastewater treatment system suitable for irrigation according to claim 5, characterized in that: The axis of the valve channel (334b) is arranged parallel to the axis of the drive shaft, a rotating member (3344) is arranged coaxially with the drive shaft in the installation cavity, the rotating member is drivingly connected to the drive shaft, at least one guide groove (33441) is radially arranged on a surface of the rotating member facing the valve channel, an inertia member (3345) is arranged in the guide groove, a drive plate (3346) is arranged coaxially with the drive shaft (3343) at the end of the valve stem (334c), an annular driving inclined surface (3347) is coaxially arranged on a surface of the driving plate facing the rotating member (3344), the inertia member (3345) is provided with a driving end (3345-1) slidably matched with the driving inclined surface (3347), and a first compression spring (3348) is arranged between the valve stem and the bottom of the valve channel.

7. A wastewater treatment system suitable for irrigation according to claim 6, characterized in that: The valve stem and the drive plate (3346) are eccentrically arranged.

8. A wastewater treatment system suitable for irrigation according to claim 4, characterized in that: A discharge port (3321) is provided at the bottom of the medicine storage tank (332), and a pneumatic control valve (333) is provided at the discharge port. The pneumatic control valve comprises a discharge valve channel (3331) connected to the discharge port (3321), and a control valve channel (3332) connected to a middle area of ​​the discharge valve channel (3331). A communication port (33320) connected to the gas source (331) is provided in the middle area of ​​the control valve channel (3332). A valve member (3333) is provided in the control valve channel (3332) as a guide. The valve member is drive-connected to a driving rod (335). The driving rod (335) is capable of driving the valve member (3333) to move in the control valve channel (3332). The other end of the discharge valve channel (3331) is connected to the plurality of medicine discharge ports (320).

9. A wastewater treatment system suitable for irrigation according to claim 8, characterized in that: A mixing tube (336) is provided between the other end of the discharge valve channel (3331) and the plurality of drug outlets (320); the other end of the discharge valve channel (3331) is communicated with the middle area of ​​the mixing tube (336); the plurality of drug outlets (320) are communicated with one end of the mixing tube (336); a discharge port (33321) is further provided at one end of the control valve channel (3332) away from the discharge valve channel (3331); the discharge port (33321) is communicated with the other end of the mixing tube (336); the driving rod (335) is capable of driving the valve member (3333) to move between a first position and a second position; the first position is a position in which the valve member blocks the discharge port (33321); and the second position is a position in which the valve member is between one end of the control valve channel (3332) close to the discharge valve channel (3331) and the communication port (33320).

10. A wastewater treatment system suitable for irrigation according to claim 9, characterized in that: A rigid gas pipe (337) is vertically arranged in the medicine storage tank (332), the upper end of the gas pipe (337) is close to the tank top of the medicine storage tank (332), the top of the medicine storage tank is connected to the gas source, and the lower end of the gas pipe (337) is connected to the communication port (33320).

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