A wastewater treatment device for high-tower fertilizer production

Abstract

The present invention belongs to the technical field of wastewater treatment, and in particular, relates to a wastewater treatment device for high-tower fertilizer production, including a sedimentation tank and a controller installed outside the sedimentation tank, and also includes: two partitions, the two partitions are respectively installed on both sides of the interior of the sedimentation tank, and the two partitions separate the sedimentation tank into a high-concentration sedimentation area, a medium-concentration sedimentation area, and a low-concentration sedimentation area; a detection box is arranged outside the sedimentation tank, and the side wall of the detection box away from the sedimentation tank is fixedly plugged with a wastewater inlet pipe, and the detection box is installed with a wastewater diversion component. The present invention can automatically precipitate according to the turbidity of the wastewater, reduce the dissolution rate of dirt, try to avoid excessive dissolution and diffusion of fertilizer dirt, reduce the difficulty of subsequent treatment, improve the overall treatment efficiency, and can achieve precise dosing. At the same time, it can indirectly reduce the amount of wastewater produced and avoid waste of water resources.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a wastewater treatment device for high-tower fertilizer production. Background Art

[0002] High-tower fertilizer is a compound fertilizer produced through a high-tower melt granulation process. Nitrogen, phosphorus, potassium and other raw materials are melted at high temperature, and the melt is allowed to fall from the top of the tower using the height difference of the tower. After cooling and screening, the fertilizer is made into uniform granules. This process is efficient, and the fertilizer produced has uniform nutrients and high quality.

[0003] At present, the whole process of high-tower fertilizer is mainly a physical mixing and melting process. There is no link that produces wastewater due to chemical reactions with a large amount of water like in some traditional compound fertilizer production processes. However, during the production of high-tower fertilizer, raw materials, impurities, etc. may adhere to the inner wall of the tower. In order to prevent the detached raw materials from affecting the quality of fertilizers, in the production of high-tower fertilizers, the tower needs to be regularly flushed, thereby generating flushing wastewater. When flushing wastewater, it is generally necessary to undergo filtration, neutralization, precipitation, biological treatment, disinfection, etc. Precipitation is one of the core links for removing impurities such as suspended matter in wastewater, such as a wastewater purification device for a high-tower fertilizer production process disclosed in patent announcement number CN220201593U;

[0004] In the production of high-tower fertilizers, the fertilizer dirt on the inner wall of the tower is unevenly distributed, with more dirt near the nozzle. During flushing, the dirt contained in the wastewater is also unevenly distributed in the sedimentation tank. Over time, the easily soluble fertilizer raw materials in the dirt are soaked and dissolved in the water, causing some of the dirt to diffuse. This phenomenon brings many adverse effects: on the one hand, the diffused dirt particles interfere with the normal sedimentation process, making it difficult for large particles that could have been precipitated to settle effectively, and small particles are even more difficult to coagulate and precipitate, significantly reducing the sedimentation removal rate. On the other hand, the dissolved and diffused fertilizer components increase the pollutant concentration and complexity of the wastewater, such as the increase in the content of nutrients such as nitrogen and phosphorus and organic impurities, which greatly increases the decomposition and metabolic burden of microorganisms in the subsequent biological treatment link, requiring more processing time, larger treatment facility scale and more sophisticated treatment process regulation, thereby increasing the cost and difficulty of the entire wastewater treatment process. Summary of the invention

[0005] The object of the present invention is to provide a wastewater treatment device for high-tower fertilizer production in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: A wastewater treatment device for high-tower fertilizer production, comprising a sedimentation tank and a controller installed outside the sedimentation tank, and also comprising:

[0007] Two baffles are respectively installed on both sides of the interior of the sedimentation tank, and the two baffles separate the sedimentation tank into a high-concentration sedimentation area, a medium-concentration sedimentation area, and a low-concentration sedimentation area;

[0008] A detection box is arranged outside the sedimentation tank, a wastewater inlet pipe is fixedly plugged into the side wall of the detection box away from the sedimentation tank, the detection box is equipped with a wastewater diversion component, and the wastewater diversion component is respectively connected to the high-concentration sedimentation area, the medium-concentration sedimentation area and the low-concentration sedimentation area;

[0009] Three auxiliary mixing units are installed on the top of the sedimentation tank, and the high concentration sedimentation area, the medium concentration sedimentation area and the low concentration sedimentation area are all connected to the gas outlet end of the auxiliary mixing unit on the same side;

[0010] Three metering trigger mechanisms are all arranged inside the corresponding auxiliary mixing unit, and the controller controls the operation of each metering trigger mechanism according to the electrical signal output by the wastewater diversion component;

[0011] Three dosing units are installed on the outer wall of the sedimentation tank, and the high concentration sedimentation area, the medium concentration sedimentation area and the low concentration sedimentation area are all connected to the discharge end of the dosing unit on the same side;

[0012] The sedimentation drainage mechanism is installed inside the sedimentation tank, and the sedimentation drainage mechanism is respectively connected with the high-concentration sedimentation area, the medium-concentration sedimentation area and the low-concentration sedimentation area.

[0013] Preferably, the wastewater diversion assembly includes a turbidity detection probe inserted on the top of the detection box, and the detection end of the turbidity detection probe is arranged inside the detection box, and the side wall of the detection box away from the wastewater inlet pipe is fixedly plugged with a high-concentration wastewater diversion pipe, a medium-concentration wastewater diversion pipe and a low-concentration wastewater diversion pipe, the water outlet end of the high-concentration wastewater diversion pipe extends to the inside of the high-concentration sedimentation area, the water outlet end of the medium-concentration wastewater diversion pipe extends to the inside of the medium-concentration sedimentation area, and the water outlet end of the low-concentration wastewater diversion pipe extends to the inside of the low-concentration sedimentation area, and the high-concentration wastewater diversion pipe, the medium-concentration wastewater diversion pipe and the low-concentration wastewater diversion pipe are all installed with diversion electric-controlled valves, and the turbidity detection probe and the diversion electric-controlled valve are both electrically connected to the controller.

[0014] Preferably, the three auxiliary mixing units all include a mounting plate fixedly mounted on the top of the sedimentation tank, and a cavity is opened inside the mounting plate, an air pump is fixedly mounted on the top of the mounting plate, and the gas delivery end of the air pump is connected to the inside of the cavity, two barrels are fixedly plugged into the lower cavity wall of the cavity, and exhaust vertical pipes are fixedly plugged into the bottom of the two barrels, the bottoms of the two exhaust vertical pipes are fixedly connected to exhaust cross pipes, and the two exhaust cross pipes are fixedly mounted inside the sedimentation tank, a group of inclined jet heads are fixedly plugged into the tube walls on the opposite sides of the two exhaust cross pipes, semiconductor refrigerators are fixedly plugged into the cavity walls on two opposite sides of the cavity, and the cooling ends of the semiconductor refrigerators are arranged inside the cavity, and the air pump and the semiconductor refrigerator are electrically connected to the controller.

[0015] Preferably, the three metering trigger mechanisms all include a liquid level meter fixedly mounted on the bottom of the mounting plate, a normally open proportional solenoid valve and a normally closed proportional solenoid valve are respectively provided on both sides of the liquid level meter, the normally open proportional solenoid valve and the normally closed proportional solenoid valve are both installed inside the corresponding barrel, a gas flow meter is provided below the normally closed proportional solenoid valve, and the detection end of the gas flow meter is fixedly plugged into the inside of the barrel on the same side, the controller controls the operation of the normally open proportional solenoid valve and the normally closed proportional solenoid valve according to the electrical signal output by the turbidity detection probe, a resistance adjustment component is installed on the end face of the mounting plate, and the gas flow meter and the liquid level meter are both electrically connected to the resistance adjustment component through the controller.

[0016] Preferably, the three dosing units all include a fixed plate fixedly mounted on the outer wall of the sedimentation tank, a medicine tank is fixedly plugged into the end face of the fixed plate, and a discharge pipe is fixedly plugged into the bottom of the medicine tank, a medicine discharge electric control valve is fixedly mounted inside the discharge pipe, and the medicine discharge electric control valve is electrically connected to the controller.

[0017] Preferably, the sedimentation drainage mechanism includes a sewage pipe fixedly inserted on the lower side of the side wall of the sedimentation tank, the water outlet end of the sewage pipe is arranged outside the sedimentation tank, and the water inlet end of the sewage pipe extends into the high-concentration sedimentation area, the medium-concentration sedimentation area and the low-concentration sedimentation area are both provided with drainage pipes, and the two drainage pipes are connected to the sewage pipe, sewage electric-controlled valves are installed inside the water inlet end of the sewage pipe and inside the two drainage pipes, and the three sewage electric-controlled valves are electrically connected to the controller, and sedimentation hoppers are arranged at the bottom of the high-concentration sedimentation area, the medium-concentration sedimentation area and the low-concentration sedimentation area, and a manual valve is installed at the discharge end of each sedimentation hopper.

[0018] Preferably, the three resistance regulating assemblies all include a hollow insulating plate fixedly mounted on the end face of the mounting plate, and two insulating columns are fixedly mounted on the inner bottom of the hollow insulating plate, a U-shaped resistance rod is commonly fixedly connected to the tops of the two insulating columns, a liquid level electromagnetic push rod and a concentration electromagnetic push rod are fixedly mounted on the inner bottom of the hollow insulating plate, and the telescopic ends of the liquid level electromagnetic push rod and the concentration electromagnetic push rod are both installed with insulating blocks, conductive rings are fixedly inserted on the end faces of the two insulating blocks, and the two conductive rings are in sliding contact with the column wall of the insulating column on the same side, the diameter of the U-shaped resistance rod is the same as the diameter of the two insulating columns, the controller controls the operation of the liquid level electromagnetic push rod according to the electrical signal output by the liquid level meter, and the controller controls the operation of the concentration electromagnetic push rod according to the electrical signal output by the gas flow meter, and the U-shaped resistance rod and the two conductive rings are electrically connected to the corresponding medicine discharge electric control valve through the controller.

[0019] Preferably, a water storage box is provided inside the low-concentration sedimentation area, and the water storage box is connected to the water outlet end of the low-concentration wastewater diversion pipe, a drainage hole is provided at the bottom of the water storage box, and a normally open drainage solenoid valve is installed inside the drainage hole, a water pressure detector is fixedly connected to the side wall of the water storage box, and the detection end of the water pressure detector is provided inside the water storage box, the controller controls the operation of the normally open drainage solenoid valve according to the electrical signal output by the turbidity detection probe, and the water pressure detector is electrically connected to the controller.

[0020] Compared with the existing technology, the advantages of a high-tower fertilizer production wastewater treatment device are:

[0021] 1. Through the cooperation of the sedimentation tank, controller, baffle, high-concentration sedimentation area, medium-concentration sedimentation area, low-concentration sedimentation area, detection box, wastewater inlet pipe, and wastewater diversion components, the wastewater can be automatically zoned and precipitated based on the turbidity of the high-tower fertilizer dirt wastewater flushed down. On the one hand, it can avoid the fertilizer dirt dissolving and spreading over a large range, resulting in a poor precipitation removal rate. On the other hand, it can reduce the difficulty of subsequent treatment of the wastewater after sedimentation treatment and improve the efficiency and difficulty of the overall wastewater treatment.

[0022] 2. The auxiliary mixing unit can not only reduce the dissolution rate of fertilizer dirt during water inlet, but also improve the contact adequacy between wastewater and flocculant when it comes into contact with flocculant later.

[0023] 3. Through the cooperation of the metering trigger mechanism and the dosing unit, the amount of flocculant entering each area can be automatically adjusted based on the amount of wastewater diverted to the high-concentration sedimentation area, the medium-concentration sedimentation area and the low-concentration sedimentation area and the cumulative concentration of the wastewater, thereby achieving precise dosing, ensuring the flocculation effect, reducing the waste of flocculants, and avoiding secondary pollution.

[0024] 4. Through the coordination of the water storage box, drainage hole, normally open solenoid valve and water pressure detector, it is possible to judge whether the cleaning work of the high tower flushing is completed based on the turbidity of the discharged wastewater, thereby indirectly reducing the production of wastewater and minimizing the waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a wastewater treatment device for high-tower fertilizer production provided by the present invention;

[0026] Figure 2 It is a cross-sectional structural schematic diagram of a wastewater treatment device for high-tower fertilizer production provided by the present invention;

[0027] Figure 3 It is a structural schematic diagram of a wastewater diversion component of a wastewater treatment device for high-tower fertilizer production provided by the present invention;

[0028] Figure 4 It is a three-dimensional structural schematic diagram of a wastewater diversion component of a wastewater treatment device for high-tower fertilizer production provided by the present invention;

[0029] Figure 5 The invention provides a wastewater treatment device for high-tower fertilizer production. Figure 2 A magnified view of the structure of part A;

[0030] Figure 6 This is a schematic diagram of the structure of a dosing unit of a wastewater treatment device for high-tower fertilizer production provided by the present invention;

[0031] Figure 7 This is a schematic diagram of the internal structure of a discharge pipe of a wastewater treatment device for high-tower fertilizer production provided by the present invention;

[0032] Figure 8 It is a structural schematic diagram of a resistance regulating component of a wastewater treatment device for high-tower fertilizer production provided by the present invention;

[0033] Fig. 9 The present invention provides a schematic diagram of the internal structure of a water storage box of a wastewater treatment device for high-tower fertilizer production.

[0034] In the figure: 1 sedimentation tank, 2 controller, 3 partition, 4 high concentration sedimentation area, 5 medium concentration sedimentation area, 6 low concentration sedimentation area, 7 detection box, 8 wastewater inlet pipe, 9 wastewater diversion assembly, 91 turbidity detection probe, 92 high concentration wastewater diversion pipe, 93 medium concentration wastewater diversion pipe, 94 low concentration wastewater diversion pipe, 95 diversion electric control valve, 10 auxiliary mixing unit, 101 mounting plate, 102 cavity, 103 air pump, 104 barrel, 105 exhaust vertical pipe, 106 exhaust horizontal pipe, 107 nozzle, 108 semiconductor refrigerator, 11 metering trigger mechanism, 111 liquid level meter, 112 normally open proportional Solenoid valve, 113 normally closed proportional solenoid valve, 114 gas flow meter, 12 dosing unit, 121 fixed plate, 122 medicine tank, 123 discharge pipe, 124 medicine discharge electric control valve, 13 sedimentation and drainage mechanism, 131 sewage pipe, 132 drainage pipe, 133 sewage electric control valve, 134 sedimentation bucket, 135 manual valve, 14 resistance adjustment component, 141 hollow insulating plate, 142 insulating column, 143 U-shaped resistance rod, 144 liquid level electromagnetic push rod, 145 concentration electromagnetic push rod, 146 insulating block, 147 conductive ring, 15 water storage box, 16 drainage hole, 17 drainage normally open electromagnetic valve, 18 water pressure detector. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely 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.

[0036] like Figure 1-Figure 9As shown, a wastewater treatment device for high-tower fertilizer production includes a sedimentation tank 1 and a controller 2 installed outside the sedimentation tank 1, and also includes: two partitions 3, the two partitions 3 are respectively installed on both sides of the interior of the sedimentation tank 1, the two partitions 3 separate the sedimentation tank 1 into a high-concentration sedimentation area 4, a medium-concentration sedimentation area 5 and a low-concentration sedimentation area 6, a detection box 7 is arranged outside the sedimentation tank 1, and a wastewater inlet pipe 8 is fixedly inserted on the side wall of the detection box 7 away from the sedimentation tank 1, the detection box 7 is installed with a wastewater diversion component 9, and the wastewater diversion component 9 is respectively connected to the high-concentration sedimentation area 4, the medium-concentration sedimentation area 5 and the low-concentration sedimentation area 6, the wastewater diversion component 9 includes a turbidity detection probe 91 inserted on the top of the detection box 7, and the turbidity The detection end of the turbidity detection probe 91 is arranged inside the detection box 7, and a high-concentration wastewater shunt pipe 92, a medium-concentration wastewater shunt pipe 93 and a low-concentration wastewater shunt pipe 94 are fixedly connected to the side wall of the detection box 7 away from the wastewater inlet pipe 8. The outlet end of the high-concentration wastewater shunt pipe 92 extends to the inside of the high-concentration sedimentation area 4, the outlet end of the medium-concentration wastewater shunt pipe 93 extends to the inside of the medium-concentration sedimentation area 5, and the outlet end of the low-concentration wastewater shunt pipe 94 extends to the inside of the low-concentration sedimentation area 6. The high-concentration wastewater shunt pipe 92, the medium-concentration wastewater shunt pipe 93 and the low-concentration wastewater shunt pipe 94 are all installed with a diversion electric control valve 95, and the turbidity detection probe 91 and the diversion electric control valve 95 are both electrically connected to the controller 2.

[0037] The three auxiliary mixing units 10 are all installed on the top of the sedimentation tank 1. The high-concentration sedimentation area 4, the medium-concentration sedimentation area 5 and the low-concentration sedimentation area 6 are all connected to the gas outlet end of the auxiliary mixing unit 10 on the same side. The three auxiliary mixing units 10 all include a mounting plate 101 fixedly installed on the top of the sedimentation tank 1, and a cavity 102 is opened inside the mounting plate 101. An air pump 103 is fixedly installed on the top of the mounting plate 101, and the gas delivery end of the air pump 103 is connected to the inside of the cavity 102. Two barrels 104 are fixedly plugged into the lower cavity wall of the cavity 102, and the bottoms of the two barrels 104 are fixedly plugged with exhaust vertical Tube 105, the bottoms of the two exhaust vertical pipes 105 are fixedly connected to the exhaust cross pipe 106, and the two exhaust cross pipes 106 are fixedly installed inside the sedimentation tank 1, the pipe walls on the opposite sides of the two exhaust cross pipes 106 are fixedly plugged with a group of inclined nozzles 107, the cavity walls on two opposite sides of the cavity 102 are fixedly plugged with semiconductor refrigerators 108, and the cooling ends of the semiconductor refrigerators 108 are arranged inside the cavity 102, the air pump 103 and the semiconductor refrigerator 108 are electrically connected to the controller 2, and the cold end of the semiconductor refrigerator 108 can cool the inside of the cavity 102.

[0038] The three metering trigger mechanisms 11 are all arranged inside the corresponding auxiliary mixing unit 10. The controller 2 controls the operation of each metering trigger mechanism 11 according to the electrical signal output by the wastewater diversion component 9. The three metering trigger mechanisms 11 all include a liquid level meter 111 fixedly installed at the bottom of the mounting plate 101. A normally open proportional solenoid valve 112 and a normally closed proportional solenoid valve 113 are respectively arranged on both sides of the liquid level meter 111. The normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 are both installed inside the corresponding barrel 104. A gas flow meter 114 is arranged below the normally closed proportional solenoid valve 113, and the gas flow meter 114 is arranged at the bottom of the wastewater diversion component 9. The detection end of 114 is fixedly plugged into the inside of the barrel 104 on the same side. The controller 2 controls the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 to work according to the electrical signal output by the turbidity detection probe 91. The end face of the mounting plate 101 is installed with a resistance adjustment component 14. The gas flow meter 114 and the liquid level meter 111 are both electrically connected to the resistance adjustment component 14 through the controller 2. The liquid level meter 111 can output an analog electrical signal of corresponding size to the controller 2 according to the detected liquid level height, and the gas flow meter 114 can output an analog electrical signal of corresponding size to the controller 2 according to the detected gas flow rate.

[0039] The three dosing units 12 are all installed on the outer wall of the sedimentation tank 1. The high-concentration sedimentation area 4, the medium-concentration sedimentation area 5 and the low-concentration sedimentation area 6 are all connected to the discharge end of the dosing unit 12 on the same side. The three dosing units 12 all include a fixed plate 121 fixedly installed on the outer wall of the sedimentation tank 1. The end surface of the fixed plate 121 is fixedly plugged with a medicine tank 122, and the bottom of the medicine tank 122 is fixedly plugged with a discharge pipe 123. A medicine discharge electric control valve 124 is fixedly installed inside the discharge pipe 123, and the medicine discharge electric control valve 124 is electrically connected to the controller 2.

[0040] The sedimentation drainage mechanism 13 is installed inside the sedimentation tank 1, and the sedimentation drainage mechanism 13 is connected to the high concentration sedimentation area 4, the medium concentration sedimentation area 5 and the low concentration sedimentation area 6 respectively. The sedimentation drainage mechanism 13 includes a sewage pipe 131 fixedly plugged into the lower side of the side wall of the sedimentation tank 1, the outlet end of the sewage pipe 131 is arranged outside the sedimentation tank 1, and the water inlet end of the sewage pipe 131 extends to the high concentration sedimentation area 4. The interiors of the medium concentration sedimentation area 5 and the low concentration sedimentation area 6 are both provided with drainage pipes 132, and the two drainage pipes 132 are connected to the high concentration sedimentation area 4 and the medium concentration sedimentation area 5 and the low concentration sedimentation area 6. The water pipes 132 are all connected to the sewage pipe 131. The water inlet end of the sewage pipe 131 and the two drainage pipes 132 are all installed with sewage electric-controlled valves 133. The three sewage electric-controlled valves 133 are all electrically connected to the controller 2. Sedimentation buckets 134 are arranged at the bottom of the high-concentration sedimentation area 4, the medium-concentration sedimentation area 5 and the low-concentration sedimentation area 6, and the discharge end of each sedimentation bucket 134 is installed with a manual valve 135. By opening each manual valve 135, the sediment in each sedimentation bucket 134 can be transferred out.

[0041] The three resistance adjustment components 14 all include a hollow insulating plate 141 fixedly mounted on the end face of the mounting plate 101, and two insulating columns 142 are fixedly mounted on the inner bottom of the hollow insulating plate 141, and a U-shaped resistance rod 143 is fixedly connected to the top of the two insulating columns 142, and a liquid level electromagnetic push rod 144 and a concentration electromagnetic push rod 145 are fixedly mounted on the inner bottom of the hollow insulating plate 141, and the telescopic ends of the liquid level electromagnetic push rod 144 and the concentration electromagnetic push rod 145 are both installed with insulating blocks 146, and the end faces of the two insulating blocks 146 are fixedly plugged with conductive rings 147, and the two conductive rings 147 slide with the column wall of the insulating column 142 on the same side. The diameter of the U-shaped resistor rod 143 is the same as the diameter of the two insulating columns 142. The controller 2 controls the operation of the liquid level electromagnetic push rod 144 according to the electrical signal output by the liquid level meter 111. The controller 2 controls the operation of the concentration electromagnetic push rod 145 according to the electrical signal output by the gas flow meter 114. The U-shaped resistor rod 143 and the two conductive rings 147 are electrically connected to the corresponding medicine discharging electric control valve 124 through the controller 2. After the connection position of the U-shaped resistor rod 143 and the conductive ring 147 changes, the length of the U-shaped resistor rod 143 and the two conductive rings 147 connected to the medicine discharging electric control valve 124 changes synchronously, so that the resistance of the connection loop also changes synchronously.

[0042] A water storage box 15 is provided inside the low-concentration sedimentation area 6, and the water storage box 15 is connected to the water outlet end of the low-concentration wastewater diversion pipe 94. A drainage hole 16 is provided at the bottom of the water storage box 15, and a drainage normally open solenoid valve 17 is installed inside the drainage hole 16. A water pressure detector 18 is fixedly plugged into the side wall of the water storage box 15, and the detection end of the water pressure detector 18 is arranged inside the water storage box 15. The controller 2 controls the drainage normally open solenoid valve 17 to operate according to the electrical signal output by the turbidity detection probe 91. The water pressure detector 18 is electrically connected to the controller 2. After detecting that the water pressure reaches the set value, the water pressure detector 18 can feedback an electrical signal to the controller 2.

[0043] The operating principle of the present invention is now described as follows: the wastewater inlet pipe 8 is connected to the high tower wastewater outlet pipe (a grid filter tank is set between the high tower wastewater outlet pipe and the wastewater inlet pipe 8 for preliminary filtration), and then the sewage pipe 131 is connected to the water inlet end of the next level of wastewater treatment equipment (such as a biological reaction tank). When cleaning the high tower, the controller 2 is started;

[0044] The wastewater generated by the high tower flushing will enter the detection box 7 through the wastewater inlet pipe 8, and after the controller 2 is started, the turbidity detection probe 91 will be immediately started. The transmitting end of the turbidity detection probe 91 will emit light and project it to its receiving end. When the turbidity of the wastewater is high, the light is blocked by impurities such as suspended matter, so the light irradiated to its receiving end becomes less. At this time, the light intensity received by the receiving end of the turbidity detection probe 91 is reduced, so the resistance of the photosensitive element inside the receiving end increases, and vice versa. When the turbidity of the wastewater is low, the light intensity received by the receiving end of the turbidity detection probe 91 is high, and the resistance of the photosensitive element inside the receiving end is reduced. Therefore, the turbidity detection probe 91 will cause the electrical signal intensity output to the controller 2 to change synchronously with the turbidity change of the wastewater (the turbidity detection probe 91 outputs an analog current signal of 4mA to 20mA to the controller 2). When the turbidity of the wastewater is lower than 30%, the analog electrical signal output by the turbidity detection probe 91 to the controller 2 changes between 15 and 20mA. mA to 20mA, when the turbidity of the wastewater is in the range of 30% to 65%, the analog electrical signal output by the turbidity detection probe 91 to the controller 2 is less than 15mA and greater than 9mA, and when the turbidity of the wastewater is higher than 65%, the analog electrical signal output by the turbidity detection probe 91 to the controller 2 is in the range of 4mA to 9mA, and the measurement circuit of the controller 2 will measure the analog electrical signal output by the turbidity detection probe 91. When the analog electrical signal is in the range of 15mA to 20mA, the analog electrical signal output by the turbidity detection probe 91 is less than 15mA and greater than 9mA. When the shunt electric control valve 95 in the low-concentration wastewater shunt pipe 94 is energized and opened by the controller 2 (the shunt electric control valve 95 is a solenoid valve, and its valve hole is fully opened after being energized), the wastewater with turbidity lower than 30% enters the low-concentration sedimentation area 6 through the detection box 7 and the low-concentration wastewater shunt pipe 94. Similarly, the wastewater with medium concentration and high concentration enters the medium concentration sedimentation area 5 and the high concentration sedimentation area 4 through the medium concentration wastewater shunt pipe 93 and the high concentration wastewater shunt pipe 92 respectively.

[0045] After the controller 2 is started, the controller 2 will start the three air pumps 103 and the semiconductor refrigerator 108. The air pump 103 will deliver air to the inside of the cavity 102 on the same side. Under normal circumstances, the airflow will be discharged through one side of the barrel 104 equipped with the normally open proportional solenoid valve 112, and will be ejected from a group of nozzles 107 on the same side through the exhaust vertical pipe 105 and the exhaust horizontal pipe 106 on the same side. The airflow ejected from the nozzle 107 will drive the wastewater on the same side to flow, and the semiconductor refrigerator 108 (the semiconductor refrigerator 108 includes P-type and N-type semiconductor materials. When direct current flows from the N-type semiconductor to the P-type semiconductor When the cold end of the N-type semiconductor is at one end, the electrons jump from the high-energy conduction band of the N-type semiconductor to the low-energy valence band of the P-type semiconductor. This process requires the absorption of energy, which leads to a decrease in the temperature of the cold end. The refrigeration temperature is about 5°C. When the cold end of the N-type semiconductor is at one end, the inside of the cavity 102 can be refrigerated. Therefore, the airflow ejected by each nozzle 107 will refrigerate the wastewater on the same side. By properly refrigerating the wastewater, the thermal motion of water molecules and fertilizer dirt molecules becomes slow, the movement speed of water molecules slows down, and the frequency and strength of impacting the fertilizer dirt molecules are reduced, thereby reducing the dissolution rate of the fertilizer dirt to a certain extent;

[0046] When the measuring circuit of the controller 2 identifies the analog electrical signal output by the turbidity detection probe 91, the controller 2 will output the corresponding control current to the corresponding normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 according to the analog electrical signal range and the preset rule, so that the corresponding normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 are inversely proportionally supplied with a current of a corresponding magnitude in the range of 0.4A to 2A (by pre-establishing a linear corresponding relationship, the analog electrical signal output by the turbidity detection probe 91 is inversely proportional to the electrical signal supplied to the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113). For example, when the measurement circuit of the controller 2 detects that the analog electrical signal output by the turbidity detection probe 91 is in the range of 15mA to 20mA, the controller 2 will control the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 above the low concentration precipitation area 6 to be energized synchronously, and when the analog electrical signal strength output by the turbidity detection probe 91 to the controller 2 is 20mA, the controller 2 controls the current strength passed into the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 to be 0.4A, and when the analog electrical signal strength is 15mA, the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 are energized synchronously. 12 and the normally closed proportional solenoid valve 113 is 0.9A. When the analog electrical signal output by the turbidity detection probe 91 is in the range of 4mA to 9mA, the controller 2 will control the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 above the high concentration precipitation area 4 to be energized synchronously. When the analog electrical signal strength output by the turbidity detection probe 91 to the controller 2 is 9mA, the controller 2 controls the current strength passed into the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 to be 1.5A. When the analog electrical signal strength is 4mA, the normally open proportional solenoid valve 11 2 and the current intensity in the normally closed proportional solenoid valve 113 is 2A. Similarly, when it is less than 15mA and greater than 9mA, the controller 2 will also control the current intensity passed into the normally closed proportional solenoid valve 113 and the normally open proportional solenoid valve 112 above the medium concentration precipitation area 5 in reverse proportion, that is, the controller 2 controls the corresponding normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 to be energized according to the size of the analog electrical signal output by the turbidity detection probe 91, and inversely controls the current intensity passed into the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 according to the size of the analog electrical signal;

[0047] Taking the analog electrical signal output by the turbidity detection probe 91 in the range of 4mA to 9mA as an example, as the turbidity of the wastewater is higher, the analog electrical signal strength output by the turbidity detection probe 91 to the controller 2 is smaller. At this time, the current intensity passed into the normally open proportional solenoid valve 112 and the normally closed proportional solenoid valve 113 above the high concentration sedimentation area 4 is greater. When the current intensity passed into the normally open proportional solenoid valve 112 is greater, the electromagnetic component inside it attracts the valve core to move a greater distance. At this time, the gap between the valve core and the valve hole is smaller, so the opening degree of the normally open proportional solenoid valve 112 is smaller. When the current intensity passed into the normally closed proportional solenoid valve 113 is greater, the electromagnetic component inside it attracts the valve core to move a greater distance. At this time, the gap between the valve core and the valve hole is larger, so the opening degree of the normally closed proportional solenoid valve 113 is greater. Therefore, when the turbidity of the wastewater is higher than 65%, the wastewater The higher the turbidity, the lower the opening degree of the normally open proportional solenoid valve 112, and the greater the opening degree of the normally closed proportional solenoid valve 113, so the gas flow through the normally closed proportional solenoid valve 113 increases, and at this time, the gas flow measured by the gas flowmeter 114 on this side is higher, so the gas flowmeter 114 can synchronously measure the gas flow based on the turbidity of the wastewater, and the turbidity of the wastewater in the corresponding area can be accurately reflected by the accumulation of the gas flow (although the wastewater can be transported and precipitated in different areas through the low-concentration wastewater shunt pipe 94, the high-concentration wastewater shunt pipe 92 and the medium-concentration wastewater shunt pipe 93, the turbidity of the wastewater entering each area is still different. For example, when the turbidity of the wastewater entering the low-concentration precipitation area 6 is close to 30%, the content of impurities such as suspended matter in the low-concentration precipitation area 6 is also at a high level, and the content of flocculant to be added later is also increased accordingly);

[0048] As the flushing of the high tower is nearing the end, the turbidity of the flushed wastewater gradually decreases. When the turbidity of the wastewater is lower than 15%, the measurement circuit of the controller 2 measures that the analog electrical signal output by the turbidity detection probe 91 is in the range of 17.5mA to 20mA, and the controller 2 will control the normally open solenoid valve 17 for drainage to be energized. At this time, a sufficiently large current is passed through the electromagnetic components inside the normally open solenoid valve 17 for drainage to completely close the normally open solenoid valve 17. Therefore, the wastewater discharged through the low-concentration wastewater diversion pipe 94 will temporarily stay in the water storage box 15. Since the flushing of the high tower is relatively clean at this time, the turbidity of the wastewater detected by the turbidity detection probe 91 will continue to remain low. At this time, the normally open solenoid valve 17 for drainage is continuously closed, so the wastewater entering the water storage box 15 cannot be discharged in time, thereby increasing the water pressure inside the water storage box 15, and the pressure element of the water pressure detector 18 will detect After detecting that the water pressure reaches the set value (the set value is set based on the volume of the water storage box 15), the water pressure detector 18 will feed back an electrical signal to the controller 2. At this time, the controller 2 will send an electrical signal to the handheld terminal (such as a mobile phone, etc.) of the relevant personnel through its own communication module. The relevant personnel should stop the cleaning of the tower in time to avoid excessive cleaning and waste of water resources (wherein, due to the fact that some side walls of the tower are contaminated with less pollutants during the flushing of the tower, the turbidity of some wastewater entering the wastewater inlet pipe 8 may be low. At this time, although water will be stored in the water storage box 15, relatively turbid wastewater will still be produced due to the flushing of other side walls of the tower by wastewater. Therefore, the normally open solenoid valve 17 for drainage will not be continuously energized at a high frequency, so the water pressure detector 18 will not detect that the water pressure reaches the set value and output an electrical signal to the controller 2, thereby reducing the possibility of false alarms);

[0049] After the controller 2 receives the electrical signal output by the water pressure detector 18, the controller 2 will control the operation of each liquid level meter 111. The liquid level meter 111 will emit infrared rays to the corresponding area and calculate the time required to receive the reflected infrared rays, so as to calculate the liquid level height of the corresponding area and output the analog electrical signal of corresponding size to the controller 2 according to the liquid level height (when the liquid level height is in the range of 0 meters to 4 meters, the analog electrical signal range of the output is 0mA to 20mA. The higher the liquid level height, the greater the strength of the analog electrical signal output by the liquid level meter 111 to the controller 2). After receiving the analog electrical signal output by the liquid level meter 111, the controller 2 receives the electrical signal output by each gas flow meter 114 (the gas flow meter 114 will accumulate the measured value). The gas flow is converted into an analog electrical signal and output to the controller 2. The gas flow meter 114 is in the range of 0 cubic meters to 50 cubic meters, and its analog electrical signal range is 0mA to 20mA. The higher the gas flow, the higher the analog electrical signal strength output to the controller 2). Subsequently, the controller 2 controls the corresponding liquid level electromagnetic push rod 144 and the concentration electromagnetic push rod 145 to pass corresponding currents according to the received analog electrical signals of the liquid level meter 111 and the analog electrical signals of the gas flow meter 114. Since the higher the wastewater level in a certain area, the larger the wastewater volume in the area, and the higher the corresponding gas cumulative flow rate in the area, the higher the overall concentration of the wastewater in the area, so at this time, the liquid level electromagnetic push rod 144 and the concentration electromagnetic push rod 145 are passed. 45, the current intensity in both the liquid level meter 111 and the gas flow meter 114 is relatively large. At this time, the upward movement distance of the two conductive rings 147 is relatively large (when the analog electrical signal output by the liquid level meter 111 and the gas flow meter 114 is 20mA, the upward movement distance of the conductive ring 147 on the same side pushed by the liquid level electromagnetic push rod 144 and the concentration electromagnetic push rod 145 is 20cm, and the smaller the analog electrical signal, the smaller the upward movement distance of the conductive ring 147 on the same side pushed by the liquid level electromagnetic push rod 144 and the concentration electromagnetic push rod 145). Therefore, at this time, the contact points of the two conductive rings 147 and the U-shaped resistor rod 143 are relatively moved upward. At this time, the length of the part of the U-shaped resistor rod 143 located between the two conductive rings 147 is shortened (that is, the length at which the two ends of the horizontal part of the U-shaped resistor rod 143 reach the positions of the two conductive rings 147), and the controller 2 controls After the liquid level electromagnetic push rod 144 and the concentration electromagnetic push rod 145 are energized, the two conductive rings 147, the U-shaped resistor rod 143 and the connection circuit of the corresponding medicine discharging electric control valve 124 are connected, and the connection circuit is energized for 1 minute. At this time, the medicine discharging electric control valve 124 is energized and opened (the medicine discharging electric control valve 124 is a proportional electromagnetic valve, that is, the greater the current passed, the greater the degree of opening of its valve hole). When the volume of the wastewater is large and the overall turbidity of the wastewater is high, the distance that the two conductive rings 147 move upward is large. At this time, the length of the connection circuit between the U-shaped resistor rod 143 and the two conductive rings 147 and the medicine discharging electric control valve 124 is short, so the connection circuit resistance of the U-shaped resistor rod 143, the two conductive rings 147 and the corresponding medicine discharging electric control valve 124 is small.As a result, the current flowing into the medicine discharging electric control valve 124 becomes larger, and the opening degree of the valve hole of the medicine discharging electric control valve 124 becomes larger, so that within the time of 1 minute, the amount of flocculation medicine introduced into the area through the discharge pipe 123 and the medicine discharging electric control valve 124 also increases synchronously. On the contrary, when the wastewater volume is small and the turbidity is low, the amount of flocculation medicine introduced into the area also decreases synchronously;

[0050] After the timing operation of the medicine discharging electric control valve 124 is completed, the controller 2 controls each semiconductor refrigerator 108 to stop working, and controls each normally closed proportional solenoid valve 113 to pass a sufficiently large current to make the valve hole of the normally closed proportional solenoid valve 113 fully open. At this time, the airflow delivered by the air pump 103 will be ejected together through the two groups of nozzles 107 on the same side. Driven by the relatively flowing airflow, the flocculant can be quickly mixed with the suspended matter. After 10 minutes, the controller 2 controls the air pump 103, the normally closed proportional solenoid valve 113, etc. to stop working, and waits for flocculation and sedimentation for 4 hours. The controller 2 controls the sewage discharge electric control valve 133 in the drain pipe 132 in the low-concentration sedimentation area 6 to be energized and opened. At this time, the clean water in the low-concentration sedimentation area 6 will be discharged into the next-level processing device through the drain pipe 132 and the sewage pipe 131 on this side. After 30 minutes of power-on, the controller 2 controls the sewage discharge electric control valve 133 to be energized and opened. The power is turned off and closed, and after an interval of 2 hours, the sewage electric control valve 133 in the medium-concentration sedimentation area 5 is controlled to be energized and opened. After 30 minutes of power-on and an interval of 2 hours, the controller 2 controls the sewage electric control valve 133 in the high-concentration sedimentation area 4 to be energized and opened. At this point, the sedimentation work of the fertilizer wastewater generated by the entire high-tower flushing is completed (because the overall turbidity of the wastewater in the low-concentration sedimentation area 6 is relatively low, the time required for flocculation and sedimentation is relatively short, so it can be quickly precipitated and enter the next process first, the wastewater in the medium-concentration sedimentation area 5 is second, and the wastewater in the high-concentration sedimentation area 4 is finally discharged into the next process). Through zoning sedimentation and discharge, the dissolution and diffusion of fertilizers can be avoided, the processing difficulty of the next process is reduced, and the overall wastewater treatment efficiency is improved (the sedimentation time and drainage interval in the low-concentration sedimentation area 6, the medium-concentration precipitator 5 and the high-concentration sedimentation area 4 can all be adjusted by the controller 2).

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wastewater treatment device for high-tower fertilizer production, comprising a sedimentation tank (1) and a controller (2) installed outside the sedimentation tank (1), characterized in that: Also includes: Two baffles (3) are respectively installed on both sides of the interior of the sedimentation tank (1), and the two baffles (3) separate the sedimentation tank (1) into a high-concentration sedimentation area (4), a medium-concentration sedimentation area (5) and a low-concentration sedimentation area (6); A detection box (7) is arranged outside the sedimentation tank (1); a wastewater inlet pipe (8) is fixedly plugged into a side wall of the detection box (7) away from the sedimentation tank (1); a wastewater diversion component (9) is installed on the detection box (7); and the wastewater diversion component (9) is respectively connected to the high-concentration sedimentation area (4), the medium-concentration sedimentation area (5) and the low-concentration sedimentation area (6); Three auxiliary mixing units (10) are installed on the top of the sedimentation tank (1), and the high-concentration sedimentation area (4), the medium-concentration sedimentation area (5) and the low-concentration sedimentation area (6) are all connected to the gas outlet end of the auxiliary mixing unit (10) on the same side; The three metering trigger mechanisms (11) are all arranged inside the corresponding auxiliary mixing unit (10), and the controller (2) controls the operation of each metering trigger mechanism (11) according to the electrical signal output by the wastewater diversion component (9); The three dosing units (12) are all installed on the outer wall of the sedimentation tank (1), and the high-concentration sedimentation area (4), the medium-concentration sedimentation area (5) and the low-concentration sedimentation area (6) are all connected to the discharge end of the dosing unit (12) on the same side; A sedimentation drainage mechanism (13) is installed inside the sedimentation tank (1), and the sedimentation drainage mechanism (13) is respectively connected to the high-concentration sedimentation area (4), the medium-concentration sedimentation area (5) and the low-concentration sedimentation area (6); The wastewater diversion assembly (9) comprises a turbidity detection probe (91) inserted on the top of the detection box (7), and the detection end of the turbidity detection probe (91) is arranged inside the detection box (7). A high-concentration wastewater diversion pipe (92), a medium-concentration wastewater diversion pipe (93) and a low-concentration wastewater diversion pipe (94) are fixedly connected to the side wall of the detection box (7) away from the wastewater inlet pipe (8), and the outlet end of the high-concentration wastewater diversion pipe (92) extends to the high-concentration sedimentation area (4). The outlet end of the medium-concentration wastewater shunt pipe (93) extends to the inside of the medium-concentration sedimentation zone (5), and the outlet end of the low-concentration wastewater shunt pipe (94) extends to the inside of the low-concentration sedimentation zone (6). The high-concentration wastewater shunt pipe (92), the medium-concentration wastewater shunt pipe (93), and the low-concentration wastewater shunt pipe (94) are all installed with a shunt electric control valve (95). The turbidity detection probe (91) and the shunt electric control valve (95) are both electrically connected to the controller (2).

2. A wastewater treatment device for high-tower fertilizer production according to claim 1, characterized in that: The three auxiliary mixing units (10) each comprise a mounting plate (101) fixedly mounted on the top of the sedimentation tank (1), wherein a cavity (102) is provided inside the mounting plate (101), an air pump (103) is fixedly mounted on the top of the mounting plate (101), and an air delivery end of the air pump (103) is connected to the inside of the cavity (102), two barrels (104) are fixedly plugged into the lower cavity wall of the cavity (102), and exhaust riser pipes (105) are fixedly plugged into the bottoms of the two barrels (104), and the bottoms of the two exhaust riser pipes (105) are connected to the bottoms of the two exhaust riser pipes (105). The two exhaust transverse pipes (106) are fixedly connected to each other and the two exhaust transverse pipes (106) are fixedly installed inside the sedimentation tank (1); a group of inclined jet nozzles (107) are fixedly plugged into the pipe walls on the opposite sides of the two exhaust transverse pipes (106); semiconductor refrigerators (108) are fixedly plugged into the cavity walls on the two opposite sides of the cavity (102); and the cooling ends of the semiconductor refrigerators (108) are arranged inside the cavity (102); and the air pump (103) and the semiconductor refrigerator (108) are electrically connected to the controller (2).

3. A wastewater treatment device for high-tower fertilizer production according to claim 2, characterized in that: The three metering trigger mechanisms (11) each comprise a liquid level meter (111) fixedly mounted on the bottom of the mounting plate (101); a normally open proportional solenoid valve (112) and a normally closed proportional solenoid valve (113) are respectively disposed on both sides of the liquid level meter (111); the normally open proportional solenoid valve (112) and the normally closed proportional solenoid valve (113) are both mounted inside a corresponding barrel (104); a gas flow meter (114) is disposed below the normally closed proportional solenoid valve (113); The detection end of the gas flow meter (114) is fixedly plugged into the interior of the barrel (104) on the same side; the controller (2) controls the operation of the normally open proportional solenoid valve (112) and the normally closed proportional solenoid valve (113) according to the electrical signal output by the turbidity detection probe (91); a resistance adjustment component (14) is installed on the end surface of the mounting plate (101); and the gas flow meter (114) and the liquid level meter (111) are both electrically connected to the resistance adjustment component (14) through the controller (2).

4. A wastewater treatment device for high-tower fertilizer production according to claim 3, characterized in that: The three dosing units (12) each comprise a fixed plate (121) fixedly mounted on the outer wall of the sedimentation tank (1); a medicine tank (122) is fixedly plugged into the end surface of the fixed plate (121); a discharge pipe (123) is fixedly plugged into the bottom of the medicine tank (122); a medicine discharge electric control valve (124) is fixedly mounted inside the discharge pipe (123); and the medicine discharge electric control valve (124) is electrically connected to the controller (2).

5. A wastewater treatment device for high-tower fertilizer production according to claim 1, characterized in that: The sedimentation drainage mechanism (13) comprises a sewage pipe (131) fixedly plugged into the lower side of the side wall of the sedimentation tank (1); the water outlet end of the sewage pipe (131) is arranged outside the sedimentation tank (1), and the water inlet end of the sewage pipe (131) extends into the high-concentration sedimentation area (4); the medium-concentration sedimentation area (5) and the low-concentration sedimentation area (6) are both provided with drainage pipes (132), and the two drainage pipes (132) are both connected to the sewage pipe (131); sewage electric control valves (133) are installed inside the water inlet end of the sewage pipe (131) and inside the two drainage pipes (132); the three sewage electric control valves (133) are all electrically connected to the controller (2); the bottoms of the high-concentration sedimentation area (4), the medium-concentration sedimentation area (5) and the low-concentration sedimentation area (6) are each provided with a sedimentation hopper (134), and the discharge end of each sedimentation hopper (134) is each provided with a manual valve (135).

6. A wastewater treatment device for high-tower fertilizer production according to claim 4, characterized in that: The three resistance adjustment components (14) each comprise a hollow insulating plate (141) fixedly mounted on the end surface of the mounting plate (101), and two insulating columns (142) are fixedly mounted on the inner bottom of the hollow insulating plate (141), and a U-shaped resistance rod (143) is fixedly connected to the tops of the two insulating columns (142), and a liquid level electromagnetic push rod (144) and a concentration electromagnetic push rod (145) are fixedly mounted on the inner bottom of the hollow insulating plate (141), and the telescopic ends of the liquid level electromagnetic push rod (144) and the concentration electromagnetic push rod (145) are both mounted with insulating blocks (146), and the two insulating blocks (146) are fixedly mounted on the inner bottom of the hollow insulating plate (141). The end faces are fixedly plugged with conductive rings (147), and the two conductive rings (147) are in sliding contact with the column wall of the insulating column (142) on the same side. The diameter of the U-shaped resistor rod (143) is the same as the diameter of the two insulating columns (142). The controller (2) controls the operation of the liquid level electromagnetic push rod (144) according to the electrical signal output by the liquid level meter (111). The controller (2) controls the operation of the concentration electromagnetic push rod (145) according to the electrical signal output by the gas flow meter (114). The U-shaped resistor rod (143) and the two conductive rings (147) are electrically connected to the corresponding medicine discharging electric control valve (124) through the controller (2).

7. A wastewater treatment device for high-tower fertilizer production according to claim 1, characterized in that: A water storage box (15) is arranged inside the low-concentration sedimentation area (6), and the water storage box (15) is connected to the water outlet end of the low-concentration wastewater diversion pipe (94); a drainage hole (16) is arranged at the bottom of the water storage box (15), and a drainage normally open electromagnetic valve (17) is installed inside the drainage hole (16); a water pressure detector (18) is fixedly plugged into the side wall of the water storage box (15), and the detection end of the water pressure detector (18) is arranged inside the water storage box (15); the controller (2) controls the drainage normally open electromagnetic valve (17) to operate according to the electrical signal output by the turbidity detection probe (91), and the water pressure detector (18) is electrically connected to the controller (2).

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