A sewage treatment device for sewage treatment

Abstract

The present invention relates to the field of sewage treatment, and in particular to a sewage treatment device for sewage treatment with a dosing agent, comprising a sedimentation tank, a water inlet end of the sedimentation tank is connected to a dosing mechanism, and the dosing mechanism controls the dosing amount of sewage flowing through the dosing mechanism through a dosing unit; a water outlet end of the sedimentation tank is connected to a detection mechanism, and the detection mechanism uses a titration method to determine the impurity content in the sewage after sedimentation, and controls the dosing amount of the dosing unit in a timely manner according to the determination result, and the treated sewage is discharged outwardly, and the unqualified sewage is recycled and reprocessed through a reflux mechanism. The present invention can improve the use efficiency of the agent through feedback adjustment of the dosing amount, and avoids the use of high-cost detection equipment and other instruments to measure the sewage components, while improving efficiency and greatly reducing production costs.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to a sewage treatment device for adding chemicals for sewage treatment. Background Art

[0002] When treating sewage, it is an important step to aggregate and settle suspended solids and organic matter in sewage to improve treatment efficiency and water cleanliness. In this process, flocculants and coagulants are generally used to aggregate suspended solids and organic matter in water.

[0003] Among them, the flocculant compresses the double electric layer, causing the suspended particles in the sewage to lose stability and condense into flocs, which are then precipitated and removed. The coagulant and the colloidal substances in the sewage undergo electrical neutralization and bridging adsorption to form larger flocs for easy precipitation and removal.

[0004] However, in the process of adding flocculants and coagulants, the amount of addition is difficult to control. The commonly used method is to test the samples of pre-treated sewage, measure the amount of medicine required per unit volume of sewage, and add them in a centralized manner. This method has some disadvantages.

[0005] 1. The sample detection and measurement process of pre-treated sewage is cumbersome and complicated, requiring professional equipment and personnel to operate, and there are certain measurement errors.

[0006] 2. It is impossible to solve the problem of batch differences in sewage. The dosage of drugs cannot be adjusted in time according to changes in sewage composition and impurity content, resulting in poor sewage treatment effects or waste of drugs.

[0007] 3. The effect of concentrated addition of drugs is poor, and it is impossible to achieve full fusion and contact between sewage and drugs, thereby reducing the efficiency of sewage sedimentation. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides a sewage treatment device for adding drugs for sewage treatment. The device solves the problem of low treatment efficiency caused by the inability to fully integrate sewage and drugs by adding drugs to the water flow in batches; timely adjusts the amount of drugs added by the concentration of flocculants in the treated water to avoid problems such as poor sewage treatment effect or drug waste, while avoiding frequent detection of sewage samples and solving the problem of high cost of production equipment and labor; specifically, it is achieved through the following technical solutions:

[0009] A dosing sewage treatment device for sewage treatment comprises a sedimentation tank, wherein the water inlet end of the sedimentation tank is connected to a dosing mechanism, wherein the dosing mechanism comprises a water inlet main pipe and a dosing part, wherein the dosing part adds medicine into the sewage, and wherein the dosing part comprises a flow control valve, wherein the flow control valve can control the dosing flow.

[0010] The water outlet end of the sedimentation tank is connected to a detection mechanism, which includes a main pipe. The water outlet end of the sedimentation tank is connected to the main pipe through a first transmission pump, and the main pipe is connected to a concentration measurement chamber through a first branch pipe and a second branch pipe respectively. The concentration of suspended matter is detected in the concentration measurement chamber. A second dosing part is installed on the first branch pipe, and the second dosing part is used to add medicine to the sewage in the first branch pipe.

[0011] The concentration measuring chamber can be communicated with a reflux mechanism or a drain pipe. The reflux mechanism is used to filter suspended matter. The reflux mechanism is communicated with the main flow pipe.

[0012] The first transmission pump, the flow control valve, the detection mechanism, and the reflux mechanism are respectively connected to the controller.

[0013] Preferably, the dosing mechanism also includes a first diverter pipe, which is fixedly connected to the water inlet main pipe, a diverter block is fixed in the first diverter pipe, the side of the first diverter pipe is fixedly connected to the first ends of several second diverter pipes, the second ends of several second diverter pipes are sealed and arranged in the first mixing chamber and are relatively arranged, the first mixing chamber is fixedly connected to the circulation pipe, the circulation pipe is fixedly connected to the second mixing chamber, the second mixing chamber is fixedly connected to the water outlet main pipe, and the water outlet main pipe is connected to the sedimentation tank.

[0014] The structure consisting of the first diverter pipe, the diverter block, the second diverter pipe, the first mixing chamber, and the circulating pipe is symmetrically distributed in two groups about the axis of the water inlet main pipe.

[0015] Preferably, the dosing part also includes a dosing main pipe, the flow control valve is installed on the dosing main pipe, the dosing main pipe is fixedly connected to the dosing branch pipe, the first end of the dosing branch pipe is sealed and passes through the side wall of the water inlet main pipe and is fixedly connected to the first material distribution nozzle arranged in the water inlet main pipe, and the second end of the dosing branch pipe is sealed and passes through the side wall of the second mixing chamber and is fixedly connected to the second material distribution nozzle arranged in the second mixing chamber.

[0016] Preferably, the detection mechanism further includes a first solenoid valve, the first solenoid valve is installed on the first shunt pipe, the second solenoid valve is installed on the second shunt pipe, and the first solenoid valve and the second solenoid valve are respectively connected to the controller.

[0017] The concentration measuring chamber is fixedly connected to the water inlet end of the three-way pipe, a third solenoid valve is installed on the first water outlet end of the three-way pipe, the third solenoid valve is fixedly connected to the drain pipe, a fourth solenoid valve is installed on the second water outlet end of the three-way pipe, the fourth solenoid valve is connected to the reflux mechanism, and the third solenoid valve and the fourth solenoid valve are respectively connected to the controller.

[0018] Preferably, the second dosing part includes a dosing chamber, the water outlet end of the first diverter pipe is fixedly connected to the water inlet end of the dosing chamber, the water outlet end of the dosing chamber is fixedly connected to the concentration measuring chamber, the dosing chamber is fixed to a motor, the motor is connected to the controller, the output end of the motor is sealed and passes through the dosing chamber and is fixed to an impeller arranged in the dosing chamber, the dosing chamber is fixed to a dosing pump, the dosing pump is connected to the controller, the dosing pump is fixedly connected to the first end of the dosing tube, and the second end of the dosing tube is arranged in the dosing chamber.

[0019] Preferably, the reflux mechanism includes a reflux pipe, the fourth solenoid valve is fixedly connected to the reflux pipe, the reflux pipe is fixedly connected to the inlet pipe, the inlet pipe is fixedly connected to the first end of the separation barrel, a separation layer is fixed in the middle of the separation barrel, the second end of the separation barrel is fixedly connected to the outlet pipe, the outlet pipe is fixedly connected to the reflux pipe, a second transmission pump is installed on the reflux pipe, the second transmission pump is connected to the controller, and the reflux pipe is fixedly connected to the water inlet end of the mainstream pipe.

[0020] The bottom of the separation barrel close to the inlet pipe is fixedly connected to the end of a sewage pipe. A sewage valve is installed on the sewage pipe, and the sewage valve is connected to the controller.

[0021] Preferably, the water inlet end of the sedimentation tank is located in the middle of one side of the sedimentation tank, and the water outlet end of the sedimentation tank is located in the upper part of the other side of the sedimentation tank.

[0022] Preferably, the second shunt pipe has a threaded profile.

[0023] Preferably, the contour shape of the circulating pipe is a volute shape, and the pipe diameter at the water outlet end of the circulating pipe is larger than the pipe diameter at the water inlet end of the circulating pipe.

[0024] Preferably, the impeller is directly opposite to the water inlet end of the dosing chamber, and the axis of the water outlet end of the dosing chamber is perpendicular to the axis of the impeller.

[0025] After adopting the above technical solution, the beneficial effects of the present invention are:

[0026] 1. The device does not require professional equipment and professionals to sample and test the components of the sewage to be treated and to calculate the dosing, which greatly reduces the labor cost and equipment cost.

[0027] 2. The system can measure the secondary dosing of the upper sewage after sedimentation and automatically adjust the first dosing amount according to the measurement results. It is flexible and intelligent and can adapt to the treatment needs of sewage of different concentrations.

[0028] 3. Through flexible control of the amount of added medicine, the problem of incomplete sewage treatment caused by insufficient addition of medicine or waste of medicine caused by excessive addition of medicine is avoided, and the effective utilization rate of the medicine is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic diagram of the installation of a sewage treatment device for adding chemicals for sewage treatment;

[0031] Figure 2 It is a three-dimensional diagram of the dosing mechanism;

[0032] Figure 3 It is a cutaway three-dimensional schematic diagram of some parts in the dosing mechanism;

[0033] Figure 4 for Figure 2 A transverse cross-sectional view of

[0034] Figure 5 is a schematic diagram of the testing organization;

[0035] Figure 6 for Figure 5 A partial enlarged view of the

[0036] Figure 7 Schematic diagram of the reflux mechanism.

[0037] Description of reference numerals:

[0038] 101 - sedimentation tank, 102 - first main pipe, 103 - first transmission pump, 104 - drainage pipe;

[0039] 200 - dosing mechanism, 201 - water inlet main pipe, 202 - first diversion pipe, 203 - diversion block, 204 - second diversion pipe, 205 - first mixing chamber, 206 - circulation pipe, 207 - second mixing chamber, 208 - water outlet main pipe;

[0040] 210 - dosing unit, 211 - flow control valve, 212 - dosing main pipe, 213 - dosing branch pipe, 214 - first dosing nozzle, 215 - second dosing nozzle;

[0041] 300 - detection mechanism, 301 - main flow pipe, 302 - third shunt pipe, 303 - first solenoid valve, 304 - fourth shunt pipe, 305 - second solenoid valve, 306 - concentration measurement chamber, 307 - three-way pipe, 308 - third solenoid valve, 309 - fourth solenoid valve;

[0042] 310 - second dosing part, 311 - dosing chamber, 312 - motor, 313 - impeller, 314 - dosing pump, 315 - dosing pipe;

[0043] 400 - reflux mechanism, 401 - reflux pipe, 402 - inlet pipe, 403 - separation barrel, 404 - separation layer, 405 - outlet pipe, 406 - reflux pipe, 407 - second transmission pump, 408 - sewage pipe, 409 - sewage valve;

[0044] 500 - Controller. DETAILED DESCRIPTION

[0045] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0046] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0047] See also Figure 1 The present invention discloses a dosing sewage treatment device for sewage treatment, comprising a sedimentation tank 101, wherein a dosing mechanism 200 is provided in front of the water inlet end of the sedimentation tank 101, wherein the dosing mechanism 200 comprises a water inlet main pipe 201 and a dosing unit 210, and when the sewage to be treated flows through the water inlet main pipe 201, the dosing unit 210 implements dosing, and the dosing unit 210 comprises a flow control valve 211, wherein the flow control valve 211 can control the dosing flow, wherein the inlet end of the flow control valve 211 is connected and communicated with a drug supply pipe, and the outlet end of the flow control valve 211 is communicated with the water inlet main pipe 201.

[0048] The water outlet end of the sedimentation tank 101 is fixedly connected and communicated with the first end of the first main pipe 102, a first transmission pump 103 is installed on the first main pipe 102, the second end of the first main pipe 102 is fixedly connected and communicated with the water inlet end of the main pipe 301, the water outlet end of the main pipe 301 is respectively connected with the water inlet end of the concentration measuring chamber 306 through the third branch pipe 302 and the fourth branch pipe 304, a concentration meter is sealed and fixedly installed in the concentration measuring chamber 306 for detecting the concentration of suspended matter in the water, the third branch pipe 302 is installed with a second dosing part 310, and the second dosing part 310 is used to add medicine to the sewage in the third branch pipe 302.

[0049] The water outlet end of the concentration measuring chamber 306 can be connected to the water inlet end of the reflux mechanism 400 or the drain pipe 104 respectively. When the concentration measuring chamber 306 measures that the suspended solids concentration in the sewage is less than the first preset concentration, the water outlet end of the concentration measuring chamber 306 is connected to the drain pipe 104. When the concentration measuring chamber 306 measures that the suspended solids concentration in the sewage is greater than or equal to the first preset concentration, the water outlet end of the concentration measuring chamber 306 is connected to the water inlet end of the reflux mechanism 400. The reflux mechanism 400 is used for filtering suspended solids in sewage. The water outlet end of the reflux mechanism 400 is connected to the water inlet end of the mainstream pipe 301.

[0050] The first transmission pump 103 , the flow control valve 211 , the detection mechanism 300 , and the reflux mechanism 400 are respectively connected to the controller 500 .

[0051] Among them, the inlet end of the flow control valve 211 is connected and communicated with the medicine supply pipe, which contains medicine, and the pressure in the medicine supply pipe is greater than the pressure in the water inlet main pipe 201, so that the medicine in the medicine supply pipe can be smoothly transported to the water inlet main pipe 201 through the flow control valve 211.

[0052] Among them, the water inlet end of the sedimentation tank 101 is located in the middle of the side of the sedimentation tank 101, and the water outlet end of the sedimentation tank 101 is located at the upper part of the side of the sedimentation tank 101. The purpose of this design is that the water inlet end is set in the middle to avoid disturbance of the bottom sediment, and the water outlet end is set at the upper part, so that there is no suspended matter in the output water, which is convenient for subsequent sewage detection.

[0053] Among them, the water outlet end of the concentration measuring chamber 306 is connected to the water inlet end of the reflux mechanism 400 or the drain pipe 104 through a valve, and the switching states of the two valves are opposite. When the concentration measuring chamber 306 measures that the suspended solids concentration in the sewage is less than the first preset concentration, the valve leading to the drain pipe 104 opens, and the water outlet end of the concentration measuring chamber 306 is connected to the drain pipe 104. When the concentration measuring chamber 306 measures that the suspended solids concentration in the sewage is greater than or equal to the first preset concentration, the valve leading to the reflux mechanism 400 opens, and the water outlet end of the concentration measuring chamber 306 is connected to the water inlet end of the reflux mechanism 400.

[0054] In the above-mentioned embodiment of the present invention, the sewage to be treated is added with chemicals when passing through the chemical dosing mechanism 200, and the sewage to which the chemicals are added is discharged into the sedimentation tank 101 to achieve the sedimentation of suspended matter in the sewage. After the sedimentation is completed, the upper clear sewage is taken and transmitted to the detection mechanism 300 through the first main pipe 102 and the first transmission pump 103.

[0055] When the sewage enters the detection mechanism 300, the fourth branch pipe 304 is not connected. The sewage first flows through the main pipe 301 and the third branch pipe 302 through the second dosing part 310. The second dosing part 310 implements secondary dosing. The sewage after dosing flows into the concentration measurement chamber 306 for suspended solid concentration measurement. When the concentration of the suspended solids is greater than or equal to the first preset concentration, it means that the sewage needs further dosing treatment. At this time, the controller 500 controls the flow control valve 211 to increase the amount of drug input. At this time, the sewage passing through the concentration measurement chamber 306 flows through the reflux mechanism 400, realizes the filtration of suspended solids in the water, and then flows to the detection mechanism 300 again.

[0056] On the contrary, when the concentration of suspended matter measured by the concentration measuring chamber 306 is less than the first preset concentration, it means that the sewage has met the treatment requirements. At this time, the sewage passing through the concentration measuring chamber 306 is discharged outward through the drain pipe 104 and enters the subsequent treatment link. When the suspended matter concentration measured by the concentration measuring chamber 306 within the preset time period is always less than the first preset concentration, the third diversion pipe 302 is blocked and the fourth diversion pipe 304 is connected, so that the sewage directly flows into the drain pipe 104.

[0057] By adopting the above method, by detecting the sewage treatment effect after sedimentation, the amount of reagent added to the sewage can be adjusted in time to avoid the problem of poor treatment effect caused by insufficient addition of reagents. At the same time, the above treatment method avoids the tedious work steps of testing samples through professional equipment and personnel, reduces production costs and improves work efficiency.

[0058] For further explanation of the present invention, see Figure 2 , 3 4. The dosing mechanism 200 also includes a first diversion pipe 202, a diversion block 203, a second diversion pipe 204, a first mixing chamber 205, a circulating pipe 206, a second mixing chamber 207, and a water outlet main pipe 208.

[0059] The water outlet end of the water inlet main pipe 201 is fixedly connected and communicated with the first end of the first diversion pipe 202, a diversion block 203 is fixedly installed in the first diversion pipe 202, the side of the second end of the first diversion pipe 202 is fixedly connected and communicated with the first ends of several second diversion pipes 204, the second end of the second diversion pipe 204 passes through the side wall of the first mixing chamber 205 and is arranged in the first mixing chamber 205, the second ends of the several second diversion pipes 204 are relatively arranged (together facing the axis of the first mixing chamber 205), the first end of the first mixing chamber 205 is fixedly connected to the first diversion pipe 202 but not communicated, the second end of the first mixing chamber 205 is 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 end of the second mixing chamber 207.

[0060] The structure composed of the first diverter pipe 202, the diverter block 203, the second diverter pipe 204, the first mixing chamber 205, and the circulating pipe 206 is centrally symmetrically distributed in two groups about the axis of the water inlet main pipe 201, and the water outlet end of the second group of circulating 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 water outlet main pipe 208, and the second end of the water outlet main pipe 208 is connected and communicated with the water inlet end of the sedimentation tank 101.

[0061] The dosing section 210 also includes a dosing main pipe 212, a dosing branch pipe 213, a first dosing nozzle 214, and a second dosing 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 is sealed and passes through the side wall of the water inlet main pipe 201 and is fixedly connected and communicated with the first dosing nozzle 214, the first dosing nozzle 214 is arranged in the water inlet main pipe 201, and a plurality of discharge holes are evenly opened on the first dosing nozzle 214, the second end of the dosing branch pipe 213 is sealed and passes through the side wall of the second mixing chamber 207 and is fixedly connected and communicated with the second dosing nozzle 215, the second dosing nozzle 215 is arranged in the second mixing chamber 207, and a plurality of discharge holes are evenly opened on the second dosing nozzle 215.

[0062] The diverter block 203 has a conical outline, the purpose of which is to divert the sewage in the first diverter pipe 202 so that it flows into the second diverter pipe 204 quickly and accurately.

[0063] Among them, the contour shape of the second diversion pipe 204 is a threaded shape, which is used to change the flow direction of the sewage in the first diversion pipe 202, and the outlets of several second diversion pipes 204 are facing each other, so that the sewage with the added agent in the water inlet main pipe 201 is further impacted and mixed, ensuring the uniform mixing of the sewage and the agent.

[0064] Among them, the contour shape of the circulation pipe 206 is a volute shape, and the pipe diameter at the water outlet end of the circulation pipe 206 is larger than the pipe diameter at the water inlet end of the circulation pipe 206. The purpose is to make the sewage after flowing through the circulation pipe 206 have a certain rotation speed, while slowing down the flow speed of the sewage along the axial direction of the second mixing chamber 207, increasing the disturbance intensity and storage time of the sewage in the second mixing chamber 207, and providing convenience for the secondary addition of reagents in the second mixing chamber 207.

[0065] Among them, a structure consisting of two groups of first diversion pipes 202, diversion blocks 203, second diversion pipes 204, first mixing chambers 205, and circulating pipes 206 is set, so that the sewage flowing out of the outlet ends of the two groups of circulating pipes 206 have opposite rotation directions, so that the sewage with opposite rotation directions meets in the second mixing chamber 207 to form more turbulence, thereby ensuring the mixing effect when adding medicine in the second mixing chamber 207.

[0066] Through the above structure and method, the addition of the agent is divided into two times. After the agent is added in the water inlet main pipe 201 for the first time, the impact mixing at the outlet end of multiple second branch pipes 204 is used to ensure that the sewage and the drug are fully mixed. The second time, the agent is added in the second mixing chamber 207. Due to the sewage flow direction of the circulation pipe 206, various turbulences in the second mixing chamber 207 are caused, which is conducive to further mixing of the drug. After two times of adding drugs and sufficient mixing, the sewage flows through the water outlet main pipe 208 to the sedimentation tank 101 to complete sedimentation, thereby maximizing the efficiency of suspended matter sedimentation.

[0067] For further explanation of the present invention, see Figure 5 , 6 The detection mechanism 300 includes a main flow pipe 301, a third branch pipe 302, a first solenoid valve 303, a fourth branch pipe 304, a second solenoid valve 305, a concentration measurement chamber 306, a three-way pipe 307, a third solenoid valve 308, a fourth solenoid valve 309, and a second dosing part 310.

[0068] The second end of the first main pipe 102 is fixedly connected and communicated with the water inlet end of the main pipe 301, the water outlet end of the main pipe 301 is fixedly connected and communicated with the first end of the third diversion pipe 302 and the first end of the fourth diversion pipe 304 respectively, the second end of the fourth diversion pipe 304 is fixedly connected and communicated with the water inlet end of the concentration measurement chamber 306, and the second end of the third diversion pipe 302 is connected and communicated with the water inlet end of the concentration measurement chamber 306 through the second dosing part 310.

[0069] The third shunt pipe 302 is provided with a first solenoid valve 303 , the fourth shunt pipe 304 is provided with a second solenoid valve 305 , and the first solenoid valve 303 and the second solenoid valve 305 are connected to the controller 500 , respectively.

[0070] The water outlet end of the concentration measuring chamber 306 is fixedly connected and communicated with the water inlet end of the three-way pipe 307. A third solenoid valve 308 is installed on the first water outlet end of the three-way pipe 307. The third solenoid valve 308 is fixedly connected and communicated with the drain pipe 104. A fourth solenoid valve 309 is installed on the second water outlet end of the three-way pipe 307. The fourth solenoid valve 309 is communicated with the water inlet end of the reflux mechanism 400. The third solenoid valve 308 and the fourth solenoid valve 309 are respectively connected to the controller 500.

[0071] The second dosing unit 310 includes a dosing chamber 311, a motor 312, an impeller 313, a dosing pump 314, and a dosing pipe 315. The water outlet end of the third shunt pipe 302 is fixedly connected and communicated with the water inlet end of the dosing chamber 311, the water outlet end of the dosing chamber 311 is fixedly connected and communicated with the water inlet end of the concentration measuring chamber 306, the top outer side of the dosing chamber 311 is fixedly connected to the motor 312, the motor 312 is connected to the controller 500, and the output end of the motor 312 is sealed through the dosing chamber 311. The top of the medicine chamber 311 is coaxially fixed with the impeller 313, the impeller 313 is arranged inside the medicine chamber 311, the side of the medicine chamber 311 is fixedly connected to the dosing pump 314, the dosing pump 314 is connected to the controller 500, the inlet end of the dosing pump 314 is connected and communicated with the medicine supply pipe, the outlet end of the dosing pump 314 is fixedly connected and communicated with the first end of the dosing pipe 315, and the second end of the dosing pipe 315 is sealed and passes through the side wall of the dosing chamber 311 and is arranged inside the dosing chamber 311.

[0072] The medicine supply tube connected to the inlet end of the medicine adding pump 314 contains medicine, and the controller 500 can deliver the medicine in the medicine supply tube to the medicine adding chamber 311 by driving the medicine adding pump 314 .

[0073] Among them, the impeller 313 is directly opposite to the water inlet end of the dosing chamber 311, and the axis of the water outlet end of the dosing chamber 311 is perpendicular to the axis of the impeller 313. This structural design ensures that when the sewage in the third diversion pipe 302 flows into the dosing chamber 311, the flow force exerted by the impeller 313 on the sewage is opposite to its original flow direction, thereby disrupting the flow direction of the sewage in the dosing chamber 311 and ensuring the uniform mixing of the sewage and the agent.

[0074] The above structure specifically completes its work in the following manner: the sewage after sedimentation in the sedimentation tank 101 is transported to the water inlet end of the main pipe 301 through the first main pipe 102 and the first transmission pump 103 under the control of the controller 500. At this time, the controller 500 controls the second solenoid valve 305 and the third solenoid valve 308 to be in a closed state, and the first solenoid valve 303 and the fourth solenoid valve 309 to be in an open state.

[0075] After entering the main pipe 301, the sewage first enters the dosing chamber 311 through the third branch pipe 302. Under the control of the controller 500, the motor 312 and the dosing pump 314 are both in working state, so that the sewage entering the dosing chamber 311 is fully mixed with the medicine added through the dosing pump 314 and the dosing pipe 315 under the disturbance of the impeller 313.

[0076] At this time, if the impurities in the sewage have been condensed during the first dosing process and have been settled in the sedimentation tank 101, then no suspended matter will appear if the agent is continued to be added to the sewage. On the contrary, if suspended matter continues to appear in the sewage, it means that the amount of the drug added during the first dosing process is too little, and the amount of the drug added needs to be increased.

[0077] The sewage after mixing and adding drugs flows from the drug-adding chamber 311 to the concentration measuring chamber 306. At this time, the concentration measuring chamber 306 measures the concentration of suspended matter in the sewage. When the concentration of suspended matter is greater than or equal to the first preset concentration, it means that the impurities in the sewage need further drug addition and sedimentation. At this time, the controller 500 controls the flow control valve 211 to increase the flow rate of drug addition. At the same time, after the sewage passes through the concentration measuring chamber 306, it flows into the reflux mechanism 400 to filter the suspended matter, and then flows back to the main pipe 301 for secondary treatment.

[0078] When the concentration of suspended matter measured by the concentration measuring chamber 306 is less than the first preset concentration, it means that the first dosing treatment has basically completely removed the impurities in the sewage and no dosing treatment is needed again. When the suspended matter concentration value measured by the concentration measuring chamber 306 is always less than the first preset concentration within the preset time period, the controller 500 controls the first solenoid valve 303 and the fourth solenoid valve 309 to close, and controls the fourth diversion pipe 304 and the third solenoid valve 308 to open. At the same time, 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 diversion pipe 304 and discharged to the outside.

[0079] In the above working process, when the suspended solid concentration measured by the concentration measuring chamber 306 is less than the second preset concentration (the second preset concentration is less than the first preset concentration), it is considered whether the amount of drug added is too much. At this time, under the control of the controller 500, the flow control valve 211 reduces the flow rate of drug addition, the fourth solenoid valve 309 is closed, and the third solenoid valve 308 is opened, and the concentration of subsequent suspended solids is always monitored through the concentration measuring chamber 306 until the measured suspended solid concentration is always greater than or equal to the second preset concentration and less than the first preset concentration within the preset time period. Under the control of the controller 500, the first solenoid valve 303 is closed, the second solenoid valve 305 is opened, and at the same time, 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 diversion pipe 304 and discharged to the outside.

[0080] For further explanation of the present invention, see Figure 7 , Figure 1 The reflux mechanism 400 includes a reflux pipe 401 , an inlet pipe 402 , a separation barrel 403 , a separation layer 404 , an outlet pipe 405 , a reflux pipe 406 , a second transmission pump 407 , a drain pipe 408 , and a drain valve 409 .

[0081] The fourth solenoid valve 309 is fixedly connected and communicated with the first end of the reflux pipe 401, the second end of the reflux 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, a separation layer 404 is fixedly installed 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 reflux pipe 406, a second transmission pump 407 is installed on the reflux pipe 406, the second transmission pump 407 is connected to the controller 500, and the second end of the reflux pipe 406 is fixedly connected and communicated with the water inlet end of the mainstream pipe 301.

[0082] The bottom of the separation barrel 403 close to the inlet pipe 402 is fixedly connected to and communicated with the first end of the sewage pipe 408 . A sewage valve 409 is fixedly installed on the second end of the sewage pipe 408 . The sewage valve 409 is connected to the controller 500 .

[0083] In the present invention, the sewage flowing through the concentration measuring chamber 306 flows into the separation barrel 403 through the fourth solenoid valve 309, the reflux pipe 401, and the inlet pipe 402. The suspended matter in the sewage is isolated in the separation barrel 403 through the filtering effect of the separation layer 404. The filtered sewage flows back to the main pipe 301 through the outlet pipe 405, the reflux pipe 406, and the second transmission pump 407 to continue the dosing treatment.

[0084] When the controller 500 controls the fourth solenoid valve 309 to close, the controller 500 also controls the second transmission pump 407 to stop working. At this time, sewage no longer flows into and out of the reflux mechanism 400.

[0085] In addition, when the suspended matter in the separation barrel 403 accumulates to a certain extent, the controller 500 can control the drain valve 409 to open, so as to discharge the filtered matter in the separation barrel 403, which is convenient and quick to operate.

[0086] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment device for treating sewage with a chemical, comprising a sedimentation tank (101), characterized in that: The water inlet end of the sedimentation tank (101) is connected to a dosing mechanism (200), the dosing mechanism (200) comprising a water inlet main pipe (201) and a dosing unit (210), the dosing unit (210) adding drugs to sewage, the dosing unit (210) comprising a flow control valve (211), the flow control valve (211) being capable of controlling the dosing flow rate; The water outlet of the sedimentation tank (101) is connected to a detection mechanism (300), the detection mechanism (300) comprising a main flow pipe (301), the water outlet of the sedimentation tank (101) is connected to the main flow pipe (301) via a first transmission pump (103), the main flow pipe (301) is connected to a concentration measurement chamber (306) via a third branch pipe (302) and a fourth branch pipe (304), the concentration of suspended matter is detected in the concentration measurement chamber (306), the third branch pipe (302) is provided with a second dosing unit (310), the second dosing unit (310) is used to add drugs to the sewage in the third branch pipe (302); The concentration measurement chamber (306) can be in communication with a reflux mechanism (400) and a drain pipe (104), the reflux mechanism (400) is used to filter suspended matter, and the reflux mechanism (400) is in communication with the main flow pipe (301); The first transmission pump (103), the flow control valve (211), the detection mechanism (300), and the reflux mechanism (400) are respectively connected to the controller (500); The detection mechanism (300) further comprises a first solenoid valve (303), the first solenoid valve (303) is installed on the third shunt pipe (302), the second solenoid valve (305) is installed on the fourth shunt pipe (304), and the first solenoid valve (303) and the second solenoid valve (305) are respectively connected to the controller (500); The concentration measuring chamber (306) is fixedly connected to the water inlet end of the three-way pipe (307); a third solenoid valve (308) is installed on the first water outlet end of the three-way pipe (307); the third solenoid valve (308) is fixedly connected to the drain pipe (104); a fourth solenoid valve (309) is installed on the second water outlet end of the three-way pipe (307); the fourth solenoid valve (309) is connected to the reflux mechanism (400); and the third solenoid valve (308) and the fourth solenoid valve (309) are respectively connected to the controller (500); The second dosing section (310) comprises a dosing chamber (311), the water outlet end of the third diversion pipe (302) is fixedly connected to the water inlet end of the dosing chamber (311), and the water outlet end of the dosing chamber (311) is fixedly connected to the concentration measuring chamber (306).

2. The chemical-doped sewage treatment device for sewage treatment according to claim 1 is characterized in that: The dosing mechanism (200) further comprises a first diverter pipe (202), the first diverter pipe (202) being fixedly connected to the water inlet main pipe (201), a diverter block (203) being fixedly provided in the first diverter pipe (202), a side surface of the first diverter pipe (202) being fixedly connected to the first ends of a plurality of second diverter pipes (204), the second ends of the plurality of second diverter pipes (204) being sealed and arranged in a first mixing chamber (205) and being arranged opposite to each other, the first mixing chamber (205) being fixedly connected to the circulation pipe (206), the circulation pipe (206) being fixedly connected to the second mixing chamber (207), the second mixing chamber (207) being fixedly connected to the water outlet main pipe (208), and the water outlet main pipe (208) being connected to the sedimentation tank (101); The structure consisting of the first diverter pipe (202), the diverter block (203), the second diverter pipe (204), the first mixing chamber (205), and the circulating pipe (206) is symmetrically distributed in two groups about the axis of the water inlet main pipe (201).

3. The chemical-doped sewage treatment device for sewage treatment according to claim 2 is characterized in that: The dosing section (210) further comprises a dosing main pipe (212), the flow control valve (211) being mounted on the dosing main pipe (212), the dosing main pipe (212) being fixedly connected to a dosing branch pipe (213), a first end of the dosing branch pipe (213) being sealed through a side wall of the water inlet main pipe (201) and being fixedly connected to a first material distribution nozzle (214) arranged in the water inlet main pipe (201), and a second end of the dosing branch pipe (213) being sealed through a side wall of the second mixing chamber (207) and being fixedly connected to a second material distribution nozzle (215) arranged in the second mixing chamber (207).

4. The chemical-doped sewage treatment device for sewage treatment according to claim 1 is characterized in that: The dosing chamber (311) is fixed to the motor (312), the motor (312) is connected to the controller (500), the output end of the motor (312) is sealed and passes through the dosing chamber (311) and is fixed to an impeller (313) arranged in the dosing chamber (311), the dosing chamber (311) is fixed to the dosing pump (314), the dosing pump (314) is connected to the controller (500), the dosing pump (314) is fixedly connected to a first end of a dosing tube (315), and the second end of the dosing tube (315) is arranged in the dosing chamber (311).

5. The chemical-doped sewage treatment device for sewage treatment according to claim 4 is characterized in that: The reflux mechanism (400) comprises a reflux pipe (401), the fourth solenoid valve (309) is fixedly connected to the reflux pipe (401), the reflux pipe (401) is fixedly connected to an inlet pipe (402), the inlet pipe (402) is fixedly connected to a first end of a separation barrel (403) in the reflux mechanism (400), a separation layer (404) is fixedly provided in the middle of the separation barrel (403), the second end of the separation barrel (403) is fixedly connected to an outlet pipe (405), the outlet pipe (405) is fixedly connected to a reflux pipe (406), a second transmission pump (407) is installed on the reflux pipe (406), the second transmission pump (407) is connected to the controller (500), and the reflux pipe (406) is fixedly connected to a water inlet end of the main pipe (301); The bottom of the separation barrel (403) close to the inlet pipe (402) is fixedly connected to the end of a sewage pipe (408). A sewage valve (409) is installed on the sewage pipe (408), and the sewage valve (409) is connected to the controller (500).

6. The chemical-doped sewage treatment device for sewage treatment according to claim 1 is characterized in that: The water inlet end of the sedimentation tank (101) is located in the middle of one side of the sedimentation tank (101), and the water outlet end of the sedimentation tank (101) is located in the upper part of the other side of the sedimentation tank (101).

7. The chemical-doped sewage treatment device for sewage treatment according to claim 2 is characterized in that: The profile shape of the second diversion pipe (204) is a thread shape.

8. The chemical-doped sewage treatment device for sewage treatment according to claim 7 is characterized in that: The contour shape of the circulating flow pipe (206) is a volute shape, and the pipe diameter at the water outlet end of the circulating flow pipe (206) is larger than the pipe diameter at the water inlet end of the circulating flow pipe (206).

9. The chemical-doped sewage treatment device for sewage treatment according to claim 4 is characterized in that: The impeller (313) is directly opposite to the water inlet end of the medicine adding chamber (311), and the axis of the water outlet end of the medicine adding chamber (311) is perpendicular to the axis of the impeller (313).

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