Disclosure of Invention
In order to solve the technical problems, the invention provides a dosing sewage treatment device for sewage treatment, which solves the problem of low treatment efficiency caused by insufficient fusion of sewage and medicines by adding medicines into water flow in a separated way, and solves the problems of poor sewage treatment effect or medicine waste and the like by timely adjusting the concentration of flocculate in treated water, and meanwhile, the problems of frequent detection of sewage samples and high cost of production equipment and labor are solved by adopting the following technical scheme:
the utility model provides a dosing sewage treatment plant that sewage treatment used, includes the sedimentation tank, the end intercommunication that intakes of sedimentation tank is provided with dosing mechanism, dosing mechanism is responsible for and dosing portion including intaking, dosing portion adds the medicine to sewage, dosing portion includes the flow control valve, the flow control valve can control the dosing flow.
The sedimentation tank's play water end intercommunication is provided with detection mechanism, detection mechanism includes the main flow pipe, the play water end of sedimentation tank communicates with the main flow pipe through first transfer pump, the main flow pipe communicates with concentration measurement chamber through first shunt tubes and second shunt tubes respectively, concentration measurement intracavity accomplishes suspended solid concentration detection, install the second portion of dosing on the first shunt tubes, the second portion of dosing be used for to sewage in the first shunt tubes is dosed.
The concentration measuring chamber can be in communication with a return mechanism for filtering suspended matter or a drain pipe, the return mechanism being in communication with the main flow pipe.
The first transmission pump, the flow control valve, the detection mechanism and the reflux mechanism are respectively connected with the controller.
Preferably, the dosing mechanism further comprises a first shunt tube, the first shunt tube is fixedly communicated with the water inlet main tube, a shunt block is fixed in the first shunt tube, the side face of the first shunt tube is fixedly communicated with the first ends of a plurality of second shunt tubes, the second ends of the second shunt tubes are arranged in the first mixing chamber in a sealing mode and are oppositely arranged, the first mixing chamber is fixedly communicated with the circulation tube, the circulation tube is fixedly communicated with the second mixing chamber, the second mixing chamber is fixedly communicated with the water outlet main tube, and the water outlet main tube is communicated with the sedimentation tank.
The structure body composed of the first shunt pipe, the shunt block, the second shunt pipe, the first mixing chamber and the circulation pipe is symmetrically distributed in two groups around the center of the axis of the main water inlet pipe.
Preferably, the dosing part further comprises a dosing main pipe, the flow control valve is arranged on the dosing main pipe, the dosing main pipe is fixedly communicated with the dosing branch pipe, a first end of the dosing branch pipe passes through the side wall of the water inlet main pipe in a sealing manner and is fixedly communicated with a first material distributing nozzle arranged in the water inlet main pipe, and a second end of the dosing branch pipe passes through the side wall of the second mixing chamber in a sealing manner and is fixedly communicated with a second material distributing nozzle arranged in the second mixing chamber.
Preferably, the detection mechanism further comprises a first electromagnetic valve, the first shunt pipe is provided with the first electromagnetic valve, the second shunt pipe is provided with a second electromagnetic valve, and the first electromagnetic valve and the second electromagnetic valve are respectively connected with the controller.
The concentration measuring cavity is fixedly communicated with the water inlet end of the three-way pipe, a third electromagnetic valve is installed on the first water outlet end of the three-way pipe, the third electromagnetic valve is fixedly communicated with the drain pipe, a fourth electromagnetic valve is installed on the second water outlet end of the three-way pipe, the fourth electromagnetic valve is communicated with the backflow mechanism, and the third electromagnetic valve and the fourth electromagnetic valve are respectively connected with the controller.
Preferably, the second dosing part comprises a dosing cavity, the water outlet end of the first shunt tube is fixedly communicated with the water inlet end of the dosing cavity, the water outlet end of the dosing cavity is fixedly communicated with the concentration measuring cavity, the dosing cavity is fixed with a motor, the motor is connected with the controller, the output end of the motor passes through the dosing cavity in a sealing manner and is fixed with an impeller arranged in the dosing cavity, the dosing cavity is fixed with a dosing pump, the dosing pump is connected with the controller, the dosing pump is fixedly communicated with the first end of the dosing tube, and the second end of the dosing tube is arranged in the dosing cavity.
Preferably, the reflux mechanism comprises a reflux pipe, the fourth electromagnetic valve is fixedly communicated with the reflux pipe, the reflux pipe is fixedly communicated with the inlet pipe, the inlet pipe is fixedly communicated with the first end of the separation barrel, the separation layer is fixedly arranged in the middle of the separation barrel, the second end of the separation barrel is fixedly communicated with the outlet pipe, the outlet pipe is fixedly communicated with the reflux pipe, a second transmission pump is arranged on the reflux pipe, the second transmission pump is connected with the controller, and the reflux pipe is fixedly communicated with the water inlet end of the main flow pipe.
The bottom of the separating barrel, which is close to one side of the inlet pipe, is fixedly communicated with the end of the blowdown pipe, a blowdown valve is arranged on the blowdown pipe, and the blowdown valve is connected with the controller.
Preferably, the water inlet end of the sedimentation tank is positioned at the middle part of one side of the sedimentation tank, and the water outlet end of the sedimentation tank is positioned at the upper part of the other side of the sedimentation tank.
Preferably, the profile shape of the second shunt tube is a thread shape.
Preferably, the outline shape of the circulation pipe is volute, and the diameter of the pipeline at the water outlet end of the circulation pipe is larger than that of the pipeline at the water inlet end of the circulation pipe.
Preferably, the impeller is opposite to the water inlet end of the dosing cavity, and the axis of the water outlet end of the dosing cavity is perpendicular to the axis of the impeller.
After the technical scheme is adopted, the invention has the beneficial effects that:
1. the device does not need to sample, detect and calculate the components of the sewage to be treated through professional equipment and professionals, so that labor cost and equipment cost are reduced to a great extent.
2. Through the secondary dosing survey of upper sewage after subsidence to according to the dosing of measuring result automatically regulated for the first time, nimble intelligence can adapt to the treatment demand of different concentration sewage.
3. Through the flexible control of the dosage, the problems of incomplete sewage treatment caused by less dosage or medicament waste caused by more dosage are avoided, and the effective utilization rate of the medicament is improved.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the invention. In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "mounted" and "connected" are to be interpreted in a broad sense, and may be, for example, fixedly connected, detachably connected or integrally connected, and may be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Referring to fig. 1, the dosing sewage treatment device for sewage treatment of the present invention comprises a sedimentation tank 101, wherein a dosing mechanism 200 is arranged in front of a water inlet end of the sedimentation tank 101, the dosing mechanism 200 comprises a water inlet main pipe 201 and a dosing part 210, dosing is realized through the dosing part 210 when sewage to be treated flows through the water inlet main pipe 201, the dosing part 210 comprises a flow control valve 211, the flow control valve 211 can control dosing flow, an inlet end of the flow control valve 211 is connected and communicated with a medicine supply pipe, and an outlet end of the flow control valve 211 is communicated with the water inlet main pipe 201.
The water outlet end of the sedimentation tank 101 is fixedly connected and communicated with the first end of the first main pipe 102, the first main pipe 102 is provided with a first transmission pump 103, the second end of the first main pipe 102 is fixedly connected and communicated with the water inlet end of the main flow pipe 301, the water outlet end of the main flow pipe 301 is respectively communicated with the water inlet end of the concentration measuring cavity 306 through a third shunt pipe 302 and a fourth shunt pipe 304, a concentration meter is fixedly arranged in the concentration measuring cavity 306 in a sealing manner and used for detecting the concentration of suspended matters in water, the third shunt pipe 302 is provided with a second dosing part 310, and the second dosing part 310 is used for dosing sewage in the third shunt pipe 302.
The water outlet end of the concentration measuring cavity 306 can be respectively communicated with the water inlet end or the water discharge pipe 104 of the backflow mechanism 400, when the concentration measuring cavity 306 measures that the concentration of suspended matters in sewage is smaller than the first preset concentration, the water outlet end of the concentration measuring cavity 306 is communicated with the water discharge pipe 104, when the concentration measuring cavity 306 measures that the concentration of suspended matters in sewage is larger than or equal to the first preset concentration, the water outlet end of the concentration measuring cavity 306 is communicated with the water inlet end of the backflow mechanism 400, the backflow mechanism 400 is used for filtering suspended matters in sewage, and the water outlet end of the backflow mechanism 400 is communicated with the water inlet end of the main flow pipe 301.
The first transfer pump 103, the flow control valve 211, the detection mechanism 300, and the return mechanism 400 are connected to the controller 500, respectively.
The inlet end of the flow control valve 211 is connected and communicated with a drug supply pipe, the drug supply pipe is filled with a drug, and the pressure in the drug supply pipe is greater than the pressure in the water inlet main pipe 201, so that the drug in the drug supply pipe can be smoothly conveyed into the water inlet main pipe 201 through the flow control valve 211.
Wherein, the water inlet end of sedimentation tank 101 is located the middle part of sedimentation tank 101 side, and the water outlet end of sedimentation tank 101 is located the upper portion of sedimentation tank 101 side, and the purpose of this design is that the water inlet end sets up in the middle part, avoids the disturbance to the bottom sediment, and the water outlet end sets up on upper portion for the aquatic of output does not have suspended solid, makes things convenient for the detection of follow-up sewage.
The water outlet end of the concentration measurement cavity 306 is respectively communicated with the water inlet end of the backflow mechanism 400 or the water drain pipe 104 through a valve, the on-off states of the two valves are opposite, when the concentration measurement cavity 306 measures that the concentration of suspended matters in sewage is smaller than a first preset concentration, the valve leading to the water drain pipe 104 is opened, the water outlet end of the concentration measurement cavity 306 is communicated with the water drain pipe 104, when the concentration measurement cavity 306 measures that the concentration of suspended matters in sewage is greater than or equal to the first preset concentration, the valve leading to the backflow mechanism 400 is opened, and the water outlet end of the concentration measurement cavity 306 is communicated with the water inlet end of the backflow mechanism 400.
In the above embodiment of the present invention, the chemical is added to the sewage to be treated when the sewage passes through the chemical adding mechanism 200, the sewage after the chemical addition is discharged into the sedimentation tank 101 to achieve sedimentation of suspended matters in the sewage, and the upper clear sewage is taken to be transmitted to the detection mechanism 300 through the first main pipe 102 and the first transmission pump 103 after the sedimentation is completed.
When sewage enters the detection mechanism 300, the fourth shunt tubes 304 are not communicated, the sewage firstly flows through the second dosing part 310 through the main flow tube 301 and the third shunt tubes 302, the second dosing part 310 realizes secondary dosing, the dosed sewage flows into the concentration measurement cavity 306 to carry out concentration measurement of suspended matters, when the concentration of the suspended matters is greater than or equal to a first preset concentration, the sewage is indicated to be further dosing treatment, at the moment, the controller 500 controls the flow control valve 211 to adjust the dosage, at the moment, the sewage passing through the concentration measurement cavity 306 flows through the reflux mechanism 400, the filtering of suspended matters in water is realized, and then the suspended matters flow to the detection mechanism 300 again.
On the contrary, when the concentration of the suspended matter measured by the concentration measuring cavity 306 is smaller than the first preset concentration, it indicates that the sewage has met the treatment requirement, at this time, the sewage passing through the concentration measuring cavity 306 is discharged outwards through the drain pipe 104 and enters the treatment of the subsequent link, and when the concentration of the suspended matter measured by the concentration measuring cavity 306 in the preset time period is always smaller than the first preset concentration, the third shunt pipe 302 is blocked and the fourth shunt pipe 304 is communicated, so that the sewage is directly led to the drain pipe 104.
By adopting the mode, the adding amount of the medicament in the sewage can be timely adjusted by detecting the sewage treatment effect after sedimentation, the problem of poor treatment effect caused by insufficient medicament addition is avoided, and meanwhile, the complicated working steps of testing samples through professional equipment and personnel are avoided by adopting the treatment mode, so that the production cost is reduced and the working efficiency is improved.
As a further explanation of the present invention, referring to fig. 2,3, and 4, the dosing mechanism 200 further includes a first shunt tube 202, a shunt block 203, a second shunt tube 204, a first mixing chamber 205, a circulation tube 206, a second mixing chamber 207, and a main outlet tube 208.
The water outlet end of the main water inlet pipe 201 is fixedly connected and communicated with the first end of the first shunt pipe 202, a shunt block 203 is fixedly installed in the first shunt pipe 202, the side face of the second end of the first shunt pipe 202 is fixedly connected and communicated with the first ends of a plurality of second shunt pipes 204, the second ends of the second shunt pipes 204 penetrate through the side wall of the first mixing chamber 205 and are configured in the first mixing chamber 205, the second ends of the plurality of second shunt pipes 204 are oppositely arranged (jointly face towards the axis of the first mixing chamber 205), the first ends of the first mixing chamber 205 are fixedly connected with the first shunt pipe 202 but are not communicated, the second ends of the first mixing chamber 205 are fixedly connected and communicated with the water inlet end of the circulation pipe 206, and the water outlet end of the circulation pipe 206 is fixedly connected and communicated with the first ends of the second mixing chamber 207.
The structure body consisting of the first shunt pipe 202, the shunt block 203, the second shunt pipe 204, the first mixing chamber 205 and the circulation pipe 206 is arranged in two groups with respect to the axis of the main water inlet pipe 201 in a central symmetry manner, the water outlet end of the second group of circulation pipes 206 is fixedly connected and communicated with the second end of the second mixing chamber 207, the middle part of the second mixing chamber 207 is fixedly connected and communicated with the first end of the main water outlet pipe 208, and the second end of the main water outlet pipe 208 is connected and communicated with the water inlet end of the sedimentation tank 101.
The dosing part 210 further comprises a dosing main pipe 212, a dosing branch pipe 213, a first material distributing nozzle 214 and a second material distributing nozzle 215, the outlet end of the flow control valve 211 is fixedly connected and communicated with the first end of the dosing main pipe 212, the second end of the dosing main pipe 212 is fixedly connected and communicated with the middle part of the dosing branch pipe 213, the first end of the dosing branch pipe 213 passes through the side wall of the water inlet main pipe 201 in a sealing manner and is fixedly connected and communicated with the first material distributing nozzle 214, the first material distributing nozzle 214 is arranged in the water inlet main pipe 201, a plurality of discharging holes are uniformly formed in the first material distributing nozzle 214, the second end of the dosing branch pipe 213 passes through the side wall of the second mixing chamber 207 in a sealing manner and is fixedly connected and communicated with the second material distributing nozzle 215, the second material distributing nozzle 215 is arranged in the second mixing chamber 207, and a plurality of discharging holes are uniformly formed in the second material distributing nozzle 215.
The profile of the diversion block 203 is tapered, so as to divert the sewage in the first diversion pipe 202, and make the sewage flow into the second diversion pipe 204 quickly and accurately.
The profile shape of the second shunt tube 204 is a thread shape, and is used for converting the flow direction of the sewage in the first shunt tube 202, and the outlets of the second shunt tubes 204 are opposite, so that the sewage added with the medicament in the water inlet main tube 201 is further impacted and mixed, and the uniform mixing of the sewage and the medicament is ensured.
The outline shape of the circulation pipe 206 is a volute, and the diameter of the pipe at the water outlet end of the circulation pipe 206 is larger than that of the pipe at the water inlet end of the circulation pipe 206, so that the sewage flowing through the circulation pipe 206 has a certain rotation speed, and meanwhile, the flow speed of the sewage along the axial direction of the second mixing chamber 207 is slowed down, the disturbance intensity and the storage time of the sewage in the second mixing chamber 207 are increased, and convenience is provided for secondary adding of the medicament in the second mixing chamber 207.
The two groups of structures consisting of the first shunt pipes 202, the shunt blocks 203, the second shunt pipes 204, the first mixing chamber 205 and the circulation pipes 206 are arranged, so that the rotation directions of sewage flowing out from the water outlet ends of the two groups of circulation pipes 206 are opposite, the sewage with opposite rotation directions forms more turbulence in the second mixing chamber 207, and the mixing effect during dosing in the second mixing chamber 207 is ensured.
Through the structure and the method, the adding of the medicament is divided into two times, after the medicament is added in the water inlet main pipe 201 for the first time, the impact mixing of the water outlet ends of the second shunt pipes 204 is guaranteed, the full mixing of the sewage and the medicaments is guaranteed, the medicament is added in the second mixing chamber 207 for the second time, the further mixing of the medicaments is facilitated due to the fact that the sewage flow direction of the circulation pipe 206 causes multiple turbulence in the second mixing chamber 207, the sewage after the medicament adding twice and the full mixing is subjected to the sedimentation is completed in the sedimentation tank 101 through the water outlet main pipe 208, and the sedimentation efficiency of suspended matters is guaranteed to the greatest extent.
As a further explanation of the present invention, referring to fig. 5 and 6, the detection mechanism 300 includes a main flow tube 301, a third shunt tube 302, a first solenoid valve 303, a fourth shunt tube 304, a second solenoid valve 305, a concentration measurement chamber 306, a three-way tube 307, a third solenoid valve 308, a fourth solenoid valve 309, and a second dosing portion 310.
The second end of the first main pipe 102 is fixedly connected and communicated with the water inlet end of the main flow pipe 301, the water outlet end of the main flow pipe 301 is fixedly connected and communicated with the first end of the third shunt pipe 302 and the first end of the fourth shunt pipe 304 respectively, the water inlet end of the second end concentration measuring cavity 306 of the fourth shunt pipe 304 is fixedly connected and communicated, and the second end of the third shunt pipe 302 is connected and communicated with the water inlet end of the concentration measuring cavity 306 through the second dosing part 310.
The third shunt tube 302 is provided with a first electromagnetic valve 303, the fourth shunt tube 304 is provided with a second electromagnetic valve 305, and the first electromagnetic valve 303 and the second electromagnetic valve 305 are respectively connected with the controller 500.
The water outlet end of the concentration measuring cavity 306 is fixedly connected and communicated with the water inlet end of the three-way pipe 307, a third electromagnetic valve 308 is installed on the first water outlet end of the three-way pipe 307, the third electromagnetic valve 308 is fixedly connected and communicated with the drain pipe 104, a fourth electromagnetic valve 309 is installed on the second water outlet end of the three-way pipe 307, the fourth electromagnetic valve 309 is communicated with the water inlet end of the reflux mechanism 400, and the third electromagnetic valve 308 and the fourth electromagnetic valve 309 are respectively connected with the controller 500.
The second dosing part 310 comprises a dosing cavity 311, a motor 312, an impeller 313, a dosing pump 314 and a dosing tube 315, the water outlet end of the third shunt tube 302 is fixedly connected and communicated with the water inlet end of the dosing cavity 311, the water outlet end of the dosing cavity 311 is fixedly connected and communicated with the water inlet end of the concentration measuring cavity 306, the outer side of the top of the dosing cavity 311 is fixedly connected with the motor 312, the motor 312 is connected with the controller 500, the output end of the motor 312 passes through the top of the dosing cavity 311 in a sealing manner and is coaxially fixed with the impeller 313, the impeller 313 is arranged inside the dosing cavity 311, the side surface of the dosing cavity 311 is fixedly connected with the dosing pump 314, the dosing pump 314 is connected with the controller 500, the inlet end of the dosing pump 314 is connected and communicated with the dosing tube, the outlet end of the dosing pump 314 is fixedly connected and communicated with the first end of the dosing tube 315, and the second end of the dosing tube 315 passes through the side wall of the dosing cavity 311 in a sealing manner and is arranged inside the dosing cavity 311.
Wherein, the medicine is contained in the medicine supply pipe connected with the inlet end of the medicine feeding pump 314, and the controller 500 can convey the medicine in the medicine supply pipe into the medicine feeding cavity 311 by driving the medicine feeding pump 314.
The impeller 313 is opposite to the water inlet end of the dosing cavity 311, and the axis of the water outlet end of the dosing cavity 311 is perpendicular to the axis of the impeller 313, so that when the sewage in the third shunt tube 302 flows into the dosing cavity 311, the flowing acting force applied by the impeller 313 to the sewage is opposite to the original flowing direction, thereby disturbing the flowing direction of the sewage in the dosing cavity 311 and ensuring the uniform mixing of the sewage and the medicament.
The above structure is specifically achieved by that sewage after sedimentation in the sedimentation tank 101 is transferred to the water inlet end of the main flow pipe 301 through the first main pipe 102 and the first transfer pump 103 under the control of the controller 500, and at this time, the controller 500 controls the second electromagnetic valve 305 and the third electromagnetic valve 308 to be in a closed state, and the first electromagnetic valve 303 and the fourth electromagnetic valve 309 to be in an open state.
The sewage after entering the main flow pipe 301 enters the dosing cavity 311 through the third shunt pipe 302, and under the control of the controller 500, the motor 312 and the dosing pump 314 are both in a working state at this time, so that the sewage entering the dosing cavity 311 is fully and uniformly mixed with the medicament added through the dosing pump 314 and the dosing pipe 315 under the disturbance of the impeller 313.
At this time, if the impurities in the sewage are coagulated in the first dosing process and settle in the settling tank 101, then suspended matters will not appear again when the medicines are continuously added into the sewage, otherwise, if suspended matters appear continuously in the sewage, it is indicated that the additive amount of the medicines is small in the first dosing process, and the additive amount of the medicines needs to be increased.
The sewage after the medicine adding and mixing flows into the concentration measuring cavity 306 from the medicine adding cavity 311, at this time, the concentration measuring cavity 306 measures the concentration of suspended matters in the sewage, when the concentration of the suspended matters is larger than or equal to the first preset concentration, which indicates that the impurities in the sewage need to be further added with medicine and settled, at this time, the controller 500 controls the flow control valve 211 to increase the flow of the medicine adding, and at the same time, after the sewage passes through the concentration measuring cavity 306, the sewage flows into the reflux mechanism 400 to filter the suspended matters and flows back to the main flow pipe 301 to carry out secondary treatment.
When the concentration of the suspended matters measured by the concentration measuring cavity 306 is smaller than the first preset concentration, the first dosing treatment is basically and completely performed to remove impurities in the sewage, the dosing treatment is not needed again, when the concentration value of the suspended matters measured by the concentration measuring cavity 306 is always smaller than the first preset concentration in a preset time period, the controller 500 controls the first electromagnetic valve 303 and the fourth electromagnetic valve 309 to be closed, controls the fourth shunt pipe 304 and the third electromagnetic valve 308 to be opened, and simultaneously, the controller 500 controls the motor 312 and the dosing pump 314 to stop working, and the sewage is directly transmitted to the drain pipe 104 through the fourth shunt pipe 304 and is discharged to the outside.
In the above operation, when the concentration of the suspended matter measured by the concentration measuring chamber 306 is smaller than the second preset concentration (the second preset concentration is smaller than the first preset concentration), the flow control valve 211 reduces the flow rate of the medicine under the control of the controller 500, the fourth electromagnetic valve 309 is closed, the third electromagnetic valve 308 is opened, and the concentration of the subsequent suspended matter is always monitored by the concentration measuring chamber 306 until the measured concentration of the suspended matter is always equal to or greater than the second preset concentration and smaller than the first preset concentration within the preset time period, the first electromagnetic valve 303 is closed, the second electromagnetic valve 305 is opened under the control of the controller 500, and the motor 312 and the medicine adding pump 314 are controlled by the controller 500 to stop the operation, so that the sewage is directly transferred to the drain pipe 104 through the fourth shunt pipe 304 and discharged to the outside.
As a further explanation of the present invention, referring to fig. 7 and 1, the return mechanism 400 includes a return pipe 401, an inlet pipe 402, a separation tank 403, a separation layer 404, an outlet pipe 405, a return pipe 406, a second transfer pump 407, a drain pipe 408, and a drain valve 409.
The fourth electromagnetic valve 309 is fixedly connected and communicated with the first end of the return pipe 401, the second end of the return pipe 401 is fixedly connected and communicated with the inlet pipe 402, the inlet pipe 402 is fixedly connected and communicated with the first end of the separation barrel 403, the separation layer 404 is fixedly arranged in the middle position inside the separation barrel 403, the second end of the separation barrel 403 is fixedly connected and communicated with the outlet pipe 405, the outlet pipe 405 is fixedly connected and communicated with the first end of the reverse flow pipe 406, the second transfer pump 407 is arranged on the reverse flow pipe 406, the second transfer pump 407 is connected with the controller 500, and the second end of the reverse flow pipe 406 is fixedly connected and communicated with the water inlet end of the main flow pipe 301.
The bottom of the separating barrel 403 near the side of the inlet pipe 402 is fixedly connected and communicated with the first end of the blow-down pipe 408, the second end of the blow-down pipe 408 is fixedly provided with a blow-down valve 409, and the blow-down valve 409 is connected with the controller 500.
In the present invention, after the sewage flowing through the concentration measuring chamber 306 flows into the separation tank 403 through the fourth electromagnetic valve 309, the return pipe 401 and the inlet pipe 402, the suspended substances in the sewage are isolated in the separation tank 403 by the filtering effect of the separation layer 404, and the filtered sewage flows back to the main flow pipe 301 through the outlet pipe 405, the return pipe 406 and the second transfer pump 407, and then the dosing treatment is continued.
Wherein, while the controller 500 controls the fourth electromagnetic valve 309 to be closed, the controller 500 simultaneously controls the second transfer pump 407 to stop working, and at this time, sewage no longer flows into and out of the return mechanism 400.
In addition, when suspended matters in the separation barrel 403 are accumulated to a certain extent, the controller 500 can control the blow-down valve 409 to be opened, so that filtered matters in the separation barrel 403 are discharged, and the operation is convenient and quick.
In accordance with the above embodiments of the invention, these embodiments are not exhaustive of all details, nor are they intended to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.