Sewage treatment system for thermal power plant

Abstract

The invention provides a sewage treatment system for a thermal power plant, which relates to the technical field of sewage treatment and comprises a tank body, a coagulation assembly is arranged on the left side of the tank body, a floating removal assembly and a sedimentation assembly are arranged on the right side of the tank body, the floating removal assembly is arranged above the sedimentation assembly, and an air flotation assembly is arranged between the coagulation assembly and the sedimentation assembly. An inclined plate is dredged and cleaned through a dredging mechanism in the precipitation assembly; the air flotation device further comprises an air dissolution monitoring assembly, and the air dissolution monitoring assembly is used for monitoring the air dissolution condition in the air flotation assembly. The invention solves the technical problems that the sewage treatment by adopting single air floatation or inclined plate precipitation in the sewage treatment process of the thermal power plant does not reach the standard, and the inclined plate in the inclined plate precipitation is difficult to clean.

Description

Technical Field

[0001] The invention belongs to the field of sewage treatment, and in particular relates to a sewage treatment system of a thermal power plant. Background Art

[0002] The wastewater from thermal power plants mainly comes from multiple production links, including fuel combustion and power generation process, water treatment and circulating cooling system, coal transportation and dust removal system, flue gas desulfurization system and living facilities. These wastewaters contain a variety of pollutants, such as suspended solids, oil, organic matter, heavy metal ions, acid and alkali substances, salt and difficult-to-degrade organic matter.

[0003] Among them, in the process of treating inorganic matter in the wastewater of thermal power plants, flocculation plus flotation or flocculation plus inclined plate sedimentation is usually used. Since the types of wastewater in thermal power plants are relatively complex, single flotation or inclined plate sedimentation will cause the sewage treatment to fail to meet the standards, and there is a problem of inclined plate clogging and difficulty in cleaning during the inclined plate sedimentation process. Summary of the invention

[0004] The present invention provides a wastewater treatment system for a thermal power plant, which is used to solve at least one technical problem raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a wastewater treatment system for a thermal power plant, comprising: a tank body, a coagulation component is arranged on the left side of the tank body, a defloating component and a sedimentation component are arranged on the right side of the tank body, the defloating component is arranged above the sedimentation component, an air flotation component is arranged between the coagulation component and the sedimentation component, and a dredging mechanism is used to dredge and clean the inclined plate in the sedimentation component;

[0006] It also includes an aerosol monitoring component, which is used to monitor the aerosol situation in the air flotation component.

[0007] Preferably, the coagulation component includes a flocculation baffle, which is fixed in the tank body, a support frame is fixed above the tank body, a stirring motor is installed on the support frame, a stirring rod is installed at the output end of the stirring motor, a plurality of stirring blades are bolted on the stirring rod, a dosing pipe is provided on one side of the tank body, the dosing pipe is fixed to the tank body through a pipe clamp, a uniform distribution pipe is installed at the output end of the dosing pipe, a plurality of diffusion holes are provided on the uniform distribution pipe, and a flow gap is provided below the flocculation baffle.

[0008] Preferably, the flotation component includes an overflow weir plate, a guide plate is provided between the flocculation partition and the overflow weir plate, the overflow weir plate and the guide plate are both fixed in the pool body, a guide tube is installed in the center of the guide plate, a guide motor is connected to the top of the guide tube, the guide motor bolts are installed on a support frame on the pool body, a number of flocculant tubes are installed through the guide tube, an air flotation tube is provided between the guide plate and the overflow weir plate, a pressure reducing valve air flotation nozzle is installed at the bottom of the air flotation tube, the input end of the air flotation tube is connected to the air dissolution structure, and the air dissolution structure is installed on the pool body.

[0009] Preferably, the aerosol structure includes an aerosol tank, which is fixedly mounted on the pool body. The water inlet end of the aerosol tank is flange-connected with an expansion pipe, the water outlet end of the aerosol tank is connected to the air flotation tube, the top of the expansion pipe is connected with a jet tube, the input end of the jet tube is connected to a water pump, the middle input end of the jet tube is connected to a pressurized gas pipeline, the input end of the water pump is connected to a return pipe, and the return pipe is connected to the pool body.

[0010] Preferably, the defloating assembly includes an electric transmission shaft, two electric transmission shafts are rotatably connected between the pool bodies, sprockets are symmetrically installed on the two electric transmission shafts, the sprockets between the two electric transmission shafts are connected by a transmission chain, the sprockets and the transmission chain are meshed with each other, a plurality of scraper plates are bolted between the transmission chains, a foam collecting trough is installed between the pool bodies, the scraper plates and the foam collecting trough cooperate with each other, and one side of the foam collecting trough is connected to the slag discharge pipe.

[0011] Preferably, the sedimentation assembly includes an inclined partition wall, which is fixed on the pool body, a foam collecting trough is provided above the inclined partition wall, a plurality of support frames are bolted together below the inclined partition wall, a plurality of inclined plates are installed above the support frames, an overflow plate is provided above the plurality of inclined plates, the overflow plate is installed on the pool body, a clean water outflow port is provided at the overflow plate of the pool body, a sedimentation cleaning structure is provided below the inclined plate, and a dredging mechanism is provided above the inclined plate.

[0012] Preferably, the sedimentation and cleaning structure includes a movable groove, and the two movable grooves are respectively provided on both sides of the bottom of the pool body. A lead screw 1 is rotatably connected in the two movable grooves, and one end of the lead screw 1 is connected to a cleaning motor. The cleaning motor is installed on the outside of the pool body. A movable partition is threadedly connected on the lead screw 1, and the movable partition cooperates with the pool body. A linkage rod is fixedly connected between the two movable partitions, and a sedimentation scraper is rotatably connected to the linkage rod. A limit card is installed on the linkage rod, and the limit card and the sedimentation scraper cooperate with each other. A sedimentation groove is provided on the right side of the pool body, and a sewage pipe is provided in the sedimentation groove.

[0013] Preferably, the dredging mechanism includes a lead screw two, which is rotatably connected to the front and rear sides of the pool body, one end of which is connected to the dredging motor, and the dredging motor is installed on the outside of the pool body. A linkage plate is threadedly connected to the lead screw two, and a number of dredging displacement plates are fixedly connected below the linkage plate, and the dredging displacement plates are slidably connected between adjacent inclined plates.

[0014] Preferably, the aerosol monitoring component includes a control module, a data processing module, a detection module and an execution module, and the detection module includes:

[0015] Water flow pressure sensor 1: used to detect the water flow pressure in the jet tube, which is arranged in the jet tube;

[0016] Water flow pressure sensor 2: used to detect the water flow pressure in the expansion pipe, which is arranged in the expansion pipe;

[0017] Water flow velocity sensor: used to detect the water flow velocity in the jet tube, which is arranged in the jet tube;

[0018] Air flow pressure sensor: used to detect the air flow pressure in the pressurized gas pipeline, which is arranged in the pressurized gas pipeline;

[0019] Air flow velocity sensor: used to detect the air flow velocity in the pressurized gas pipeline, which is arranged in the pressurized gas pipeline;

[0020] Temperature sensor: used to detect the water flow temperature in the jet tube, which is arranged in the jet tube;

[0021] Salinity sensor: used to detect the salinity of water flow in the jet tube, which is arranged in the jet tube;

[0022] pH sensor: used to detect the pH of water flow in the jet tube, which is arranged in the jet tube;

[0023] The first acquisition unit is used to acquire the flocculent flotation thickness and is arranged in the tank body;

[0024] The second acquisition unit is used to acquire the floc sedimentation thickness, and is arranged in the tank body;

[0025] The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution module to work based on the data results of the data processing module.

[0026] Preferably, the control module controls the execution module based on the data result of the data processing module, including the following steps:

[0027] Step 1: Calculate the flotation coefficient A of the flotation component based on the data of the water flow pressure sensor 1, the water flow pressure sensor 2, the water flow velocity sensor, the air flow pressure sensor, the air flow velocity sensor, the temperature sensor, the salinity sensor, the pH value sensor, the first acquisition unit and the second acquisition unit. f :

[0028] Among them: A fis the air flotation coefficient of the air flotation component, k is the air flotation loss coefficient, T is the detection value of the temperature sensor, μ is the sewage viscosity coefficient, S t is the detection value of the salinity sensor, P h is the detection value of the pH sensor, P w1 is the detection value of the water flow pressure sensor 1, V w is the detection value of the water flow velocity sensor, S is the cross-sectional area of the jet pipe, P w2 is the detection value of the water flow pressure sensor 2, P a is the detection value of the air flow pressure sensor, V a is the detection value of the air flow velocity sensor;

[0029] Step 2: The data processing module calculates and compares the air flotation precipitation ratio coefficient AS:

[0030] where AS is the air flotation precipitation ratio coefficient, H1 is the detection value of the first acquisition unit, and H2 is the detection value of the second acquisition unit;

[0031] When AS < AS0, according to the air flotation coefficient A f calculate the pressurization coefficient P t :

[0032] where AS0 is the standard air flotation precipitation ratio coefficient, P t is the pressurization coefficient;

[0033] Step 3: The control module controls the execution module to adjust the pressure in the pressurized gas pipeline and the jet pipe according to the pressurization coefficient. Description of the Drawings

[0034] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0035] Figure 1 is the structural schematic diagram of the present invention Figure 1 ;

[0036] Figure 2 is the structural schematic diagram of the present invention Figure 2 ;

[0037] Figure 3 is the structural schematic diagram of the present invention Figure 3 ;

[0038] Figure 4 is of the present invention Figure 2 Local enlarged view of part A.

[0039] In the figure: 1, tank body; 2, coagulation component; 21, flocculation baffle; 22, support frame; 23, stirring motor; 24, stirring rod; 25, stirring blade; 26, dosing pipe; 27, pipe clamp; 28, uniform dispersion pipe; 29, diffusion hole; 210, flow gap; 3, air flotation component; 31, overflow weir plate; 32, guide plate; 33, guide tube; 34, guide motor; 35, flocculant tube; 36, air flotation tube; 37, pressure reducing valve air flotation nozzle; 4, aerosol structure; 41, aerosol tank; 42, expansion pipe; 43, jet pipe; 44, water pump; 45, pressurized gas pipeline; 46, return pipe; 5, defloating group Parts; 51. Electric drive shaft; 52. Sprocket; 53. Drive chain; 54. Scraper plate; 55. Scraper tank; 56. Slag discharge pipe; 6. Sedimentation assembly; 61. Inclined partition wall; 62. Support frame; 63. Inclined plate; 64. Overflow plate; 65. Clean water outlet; 7. Sedimentation cleaning structure; 71. Moving tank; 72. Lead screw one; 73. Cleaning motor; 74. Moving partition; 75. Linkage rod; 76. Sedimentation scraper; 77. Limit card; 78. Sedimentation tank; 79. Drain pipe; 8. Dredging mechanism; 81. Lead screw two; 82. Dredging motor; 83. Linkage plate; 84. Dredging displacement plate. DETAILED DESCRIPTION

[0040] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0041] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The present invention provides the following embodiments

[0043] Example 1

[0044] The embodiment of the present invention provides a wastewater treatment system for a thermal power plant, such as Figure 1-4As shown, it comprises: a tank body 1, a coagulation component 2 is arranged on the left side of the tank body 1, a defloating component 5 and a sedimentation component 6 are arranged on the right side of the tank body 1, the defloating component 5 is arranged above the sedimentation component 6, an air flotation component 3 is arranged between the coagulation component 2 and the sedimentation component 6, and a dredging mechanism 8 is used to dredge and clean the inclined plate 63 in the sedimentation component 6;

[0045] It also includes an aerosol monitoring component, which is used to monitor the aerosol situation in the air flotation component.

[0046] The working principle and beneficial effects of the above technical solution are as follows: when the sewage enters the tank body 1, it is firstly subjected to coagulation treatment in the coagulation component 2, so that the suspended matter and colloidal substances in the sewage are destabilized, thereby aggregating together to form tiny flocs. The coagulated sewage enters the flotation component 3 again, and the flotation component 3 performs flocculation treatment on the coagulated sewage again, aggregating the tiny flocs in the sewage into larger flocs. Then, the flotation component 3 generates a number of tiny bubbles, which act on some flocs to make them float on the surface of the sewage, and then the sewage mixed with the flocs enters the flotation component 3. The floating floccules are pushed into the defloating component 5 and the sedimentation component 6, and the defloating component 5 pushes and scrapes the floating floccules out of the sewage body, while the remaining floccules are accumulated at the bottom of the tank body 1 through free sedimentation and the action of the inclined plate 63 in the sedimentation component 6. When the floccules are accumulated to a certain extent, the sedimentation cleaning structure 7 scrapes and collects them, and the dredging mechanism 8 dredges and cleans the inclined plate 63, and the purified sewage then flows out from one side of the tank body. The aerosol monitoring component monitors the flotation effect of the flotation component 3 on the floccules, and adjusts the flotation component 3 in time according to the flotation state of the floccules.

[0047] The present invention utilizes a coagulation component 2 and an air flotation component 3 to sequentially treat sewage. This design can significantly improve the removal efficiency, shorten the treatment time, effectively remove suspended matter, colloids and soluble substances in the water, and can also reduce the content of harmful substances such as organic matter and heavy metals in the water. In addition, the air flotation component 3 has an air flotation effect on flocs, which can float most of the flocs on the water surface and discharge the flocs from the water body in time to avoid all the flocs being precipitated at the bottom of the pool body, thereby complicating the cleaning process. The air flotation component 3 and the sedimentation component 6 can ensure that after most of the flocs are removed from the water surface, the remaining flocs in the water body will be precipitated and separated under the action of gravity and the inclined plate 63. This design can completely remove the flocs in the water body under the action of double separation to ensure that the sewage treatment meets the standards. The design of the dredging mechanism 8 can ensure that the inclined plate 63 in the sedimentation component 6 remains unobstructed, avoiding the flocs from settling on the inclined plate 63 and gradually accumulating and clogging, as well as the difficulty in cleaning the inclined plate 63.

[0048] Example 2

[0049] On the basis of Example 1, the coagulation component 2 includes a flocculation baffle 21, which is fixed in the tank body 1. A support frame 22 is fixed above the tank body 1. A stirring motor 23 is installed on the support frame 22. A stirring rod 24 is installed at the output end of the stirring motor 23. A plurality of stirring blades 25 are bolted to the stirring rod 24. A dosing pipe 26 is provided on one side of the tank body 1. The dosing pipe 26 is fixed to the tank body through a pipe clamp 27. A uniform distribution pipe 28 is installed at the output end of the dosing pipe 26. A plurality of diffusion holes 29 are provided on the uniform distribution pipe 28. A flow gap 210 is provided below the flocculation baffle 21.

[0050] The working principle and beneficial effects of the above technical solution are as follows: after the sewage enters the tank body 1, the stirring motor 23 is started to rotate the stirring rod 24 and the stirring blade 25 to generate a vortex in the sewage water body, and then the coagulant is introduced into the dosing pipe 26, and the coagulant diffuses into the water body from the diffusion hole 29 on the uniform dispersion pipe 28, and tiny floccules are generated under the action of the vortex, and the coagulated sewage enters the air flotation component 3 from the flow gap 210 of the flocculation partition 21;

[0051] The present invention utilizes a stirring rod 24 and a stirring blade 25 to generate a vortex in the sewage water body. This design promotes and accelerates the coagulant to destabilize fine suspended particles and colloids in the water body to form tiny floccules, thereby improving the coagulation efficiency. At the same time, the design of the dispersion tube 28 and the diffusion hole 29 can ensure that the coagulant is evenly dispersed in all layers of the water body, avoiding dead corners in the water body where the coagulant cannot act.

[0052] Example 3

[0053] On the basis of Example 1, the flotation component 3 includes an overflow weir plate 31, a guide plate 32 is provided between the flocculation partition plate 21 and the overflow weir plate 31, the overflow weir plate 31 and the guide plate 32 are both fixed in the pool body 1, a guide tube 33 is installed at the center of the guide plate 32, a guide motor 34 is connected to the top of the guide tube 33, the guide motor 34 is bolted to the support frame 22 on the pool body 1, a plurality of flocculant tubes 35 are installed through the guide tube 33, an air flotation tube 36 is provided between the guide plate 32 and the overflow weir plate 31, a pressure reducing valve air flotation nozzle 37 is installed at the bottom of the air flotation tube 36, the input end of the air flotation tube 36 is connected to the aerosol structure 4, and the aerosol structure 4 is installed on the pool body 1.

[0054] The aerosol structure 4 includes an aerosol tank 41, which is fixedly installed on the pool body 1. The water inlet end of the aerosol tank 41 is flange-connected with an expansion pipe 42, the water outlet end of the aerosol tank 41 is connected to the air flotation tube 36, the top of the expansion pipe 42 is connected with a jet tube 43, the input end of the jet tube 43 is connected with a water pump 44, the middle input end of the jet tube 43 is connected with a pressurized gas pipeline 45, the input end of the water pump 44 is connected with a return pipe 46, and the return pipe 46 is connected to the pool body 1.

[0055] The beneficial effects of the above technical solution are as follows: after the sewage enters the air flotation component 3, the guide motor 34 drives the guide tube 33 to rotate. Under the action of the guide plate 32, the sewage water body forms a circulating flow on both sides of the guide plate 32. At the same time, the flocculant discharged from the flocculant tube 35 falls into the guide tube 33. The flocculant is evenly mixed into the sewage water body under the action of the guide tube 33, so that the tiny floccules in the sewage water body are aggregated into flocs. After the flocculated sewage passes over the guide plate 32, the air flotation tube 36 sprays out dissolved oxygen water through the air flotation nozzle 37 of the pressure reducing valve. The dissolved oxygen water releases a number of tiny bubbles under the action of the pressure drop. The tiny bubbles attach to the flocs to make them float. After the flocs pass over the overflow weir plate 31, part of the flocs float on the surface of the sewage water body, and part of the flocs settle or suspend in the sewage water body.

[0056] When the purified sewage in the return pipe 46 enters the jet pipe 43 under the pressure of the water pump 44, the water body enters the expansion pipe 42 from the jet pipe 43. Due to the sudden change in the pipe diameter, the volume of the water body diffuses under the pressure. At the same time, after the pressurized gas is input into the pressurized gas pipeline 45, part of the gas is dissolved into the diffused water body under the pressure, and the subsequent water body continues to squeeze the remaining gas to make it dissolve again. Then the aerosolized water body enters the aerosol tank 41, and the aerosolized water body enters the air flotation pipe 36 from the aerosol tank 41.

[0057] The present invention utilizes the guide tube 33 and the guide plate 32 to circulate the sewage water body. This design cooperates with the action of the flocculant tube 35 to make the flocculant evenly mixed into the sewage water body and circulate the entire water body through the diversion effect, avoiding the existence of dead corners in the sewage water body and failing to flocculate all the water bodies. The design of the flotation tube 36 and the pressure reducing valve flotation nozzle 37 can make the aerosol water quickly release tiny bubbles due to the pressure drop after release, which can quickly make the flocs float. At the same time, in the aerosol structure 4, the design of double dissolution of gas through the jet tube 43 and the expansion tube 42 can effectively improve the dissolution efficiency of the gas.

[0058] Example 4

[0059] On the basis of Example 1, the defloating assembly 5 includes an electric transmission shaft 51, and the two electric transmission shafts 51 are rotatably connected between the pool bodies 1. Sprockets 52 are symmetrically installed on the two electric transmission shafts 51. The sprockets 52 between the two electric transmission shafts 51 are connected by a transmission chain 53. The sprockets 52 and the transmission chain 53 are meshed with each other. A plurality of scraper plates 54 are bolted between the transmission chains 53. A foam collecting trough 55 is installed between the pool bodies 1. The scraper plates 54 and the foam collecting trough 55 cooperate with each other. One side of the foam collecting trough 55 is connected to a slag discharge pipe 56.

[0060] The beneficial effects of the above technical solution are as follows: when flocs float on the sewage water body, the electric transmission shaft 51 starts to drive the sprocket 52 to rotate, and the transmission chain 53 rotates with the sprocket 52. The scraper plate 54 on the transmission chain 53 slides along the water surface, so that the flocs on the water surface are scraped into the foam collecting tank 55, and then the flocs are discharged through the slag discharge pipe 56. The present invention utilizes the scraper plate 54 and the foam collecting tank 55 to discharge the flocs from the water body. This design can skim off the flocs through a cyclic reciprocating transmission, thereby avoiding the accumulation of flocs and improving the cleaning efficiency.

[0061] Example 5

[0062] On the basis of Example 1, the sedimentation assembly 6 includes an inclined partition wall 61, which is fixed on the pool body 1. A foam collecting trough 55 is provided above the inclined partition wall 61. A plurality of support frames 62 are bolted together below the inclined partition wall 61. A plurality of inclined plates 63 are installed above the support frames 62. An overflow plate 64 is provided above the plurality of inclined plates 63. The overflow plate 64 is installed on the pool body 1. The pool body 1 is provided with a clean water flow outlet 65 at the overflow plate 64. A sedimentation cleaning structure 7 is provided below the inclined plate 63, and a dredging mechanism 8 is provided above the inclined plate 63.

[0063] The sedimentation and cleaning structure 7 includes a movable groove 71, and the two movable grooves 71 are respectively arranged on both sides of the bottom of the pool body 1. A lead screw 72 is rotatably connected in the two movable grooves 71. One end of the lead screw 72 is connected to a cleaning motor 73. The cleaning motor 73 is installed on the outside of the pool body 1. A movable partition 74 is threadedly connected to the lead screw 72. The movable partition 74 cooperates with the pool body 1. A linkage rod 75 is fixedly connected between the two movable partitions 74. A sedimentation scraper 76 is rotatably connected to the linkage rod 75. A limit card 77 is installed on the linkage rod 75. The limit card 77 and the sedimentation scraper 76 cooperate with each other. A sedimentation groove 78 is provided on the right side of the pool body 1, and a sewage pipe 79 is provided in the sedimentation groove 78.

[0064] The dredging mechanism 8 includes a second screw rod 81, which is rotatably connected to the front and rear sides of the pool body 1. One end of the second screw rod 81 is connected to a dredging motor 82. The dredging motor 82 is installed on the outside of the pool body 1. A linkage plate 83 is threadedly connected to the second screw rod 81, and a plurality of dredging displacement plates 84 are fixedly connected below the linkage plate 83. The dredging displacement plates 84 are slidably connected between adjacent inclined plates 63.

[0065] The beneficial effects of the above technical solution are as follows: when part of the flocs are suspended or precipitated, the precipitated part of the flocs accumulates at the bottom of the tank body 1, and the sewage carries the suspended flocs through the bottom of the inclined partition wall 61 and enters the inclined plate 63. Under the action of the inclined plate 63, the flocs accumulate on the inclined plate 63. When accumulated to a certain extent, they separate and settle to the bottom of the tank along the inclined plate 63. The purified water body rises along the inclined plate 63, and then the water body flows out from the clean water outlet 65 through the overflow plate 64.

[0066] When the deposits on the bottom of the pool are cleaned, the cleaning motor 73 is started, driving the lead screw 72 to rotate, so that the movable partition 74 on the lead screw 72 is moved back and forth, and the displacement of the movable partition 74 enables the linkage rod 75 and the sedimentation scraper 76 thereon to move back and forth. When the sedimentation scraper 76 moves to the left, due to the resistance of the water flow, the sedimentation scraper 76 rotates along the linkage rod 75 and keeps a certain distance from the bottom of the pool. When the sedimentation scraper 76 moves to the right, although there is still water resistance, under the action of the limit card 77, the sedimentation scraper 76 rotates clockwise by a certain angle, and then the sedimentation scraper 76 slides relative to the pool body 1 to push the deposits at the bottom of the pool body 1 into the sedimentation tank 78, and then it is discharged through the sewage pipe 79;

[0067] When the inclined plate 63 is to be cleared, the clearing motor 82 is started to drive the lead screw 81 to rotate, so that the linkage plate 83 moves back and forth along the lead screw 81, and the linkage plate 83 drives the clearing displacement plate 84 to slide relative to the inclined plate 63 to remove the attachments on the inclined plate 63;

[0068] The present invention uses gravity and the inclined plate 63 to clean the sewage. This design can make the floccules that are not cleaned by flotation cleaned again, avoiding the suspended and precipitated floccules from flowing out with the water body, and the overflow plate 64 can prevent a small part of the suspended matter from being discharged from the clean water outlet 65, so as to finally filter the water body;

[0069] The movable partition 74 and the linkage rod 75 are driven by the lead screw 72 to clean the deposits at the bottom of the pool body 1. This design can continuously clean the pool body 1 through reciprocating motion to ensure the cleanliness of the pool bottom. At the same time, the design of the sedimentation scraper 76 makes it not push the deposits to move when it moves to the left during cleaning, and only pushes the deposits when it moves to the right, avoiding the stirring of the deposits at the bottom of the pool;

[0070] The dredging mechanism 8 cleans the inclined plate 63 through the dredging displacement plate 84. This design can prevent flocs from accumulating on the inclined plate 63 and growing under the action of bacteria after the inclined plate 63 has worked for a long time, thereby preventing the inclined plate 63 from being blocked or the sedimentation efficiency of the inclined plate 63 from decreasing.

[0071] Example 6

[0072] On the basis of Example 1, the aerosol monitoring component includes a control module, a data processing module, a detection module and an execution module, and the detection module includes:

[0073] Water flow pressure sensor 1: used to detect the water flow pressure in the jet tube 43, and disposed in the jet tube 43;

[0074] Water flow pressure sensor 2: used to detect the water flow pressure in the expansion tube 42, and disposed in the expansion tube 42;

[0075] Water flow velocity sensor: used to detect the water flow velocity in the jet tube 43, and disposed in the jet tube 43;

[0076] Airflow pressure sensor: used to detect the airflow pressure in the pressurized gas pipeline 45, and disposed in the pressurized gas pipeline 45;

[0077] Air flow velocity sensor: used to detect the air flow velocity in the pressurized gas pipeline 45, and disposed in the pressurized gas pipeline 45;

[0078] Temperature sensor: used to detect the water flow temperature in the jet tube 43, and disposed in the jet tube 43;

[0079] Salinity sensor: used to detect the salinity of water flow in the jet tube 43, and disposed in the jet tube 43;

[0080] pH sensor: used to detect the pH of water flow in the jet tube 43, which is arranged in the jet tube;

[0081] The first acquisition unit is used to acquire the flocculent flotation thickness, and is disposed in the tank body 1;

[0082] The second acquisition unit is used to acquire the floc sedimentation thickness, and is arranged in the tank body 1;

[0083] The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution module to work based on the data results of the data processing module.

[0084] The control module controls the execution module based on the data results of the data processing module, including the following steps:

[0085] Step 1: Calculate the flotation coefficient A of the flotation component 3 based on the data of the water flow pressure sensor 1, the water flow pressure sensor 2, the water flow velocity sensor, the air flow pressure sensor, the air flow velocity sensor, the temperature sensor, the salinity sensor, the pH value sensor, the first acquisition unit and the second acquisition unit. f :

[0086] Among them: A fis the air flotation coefficient of the air flotation component, k is the air flotation loss coefficient, T is the detection value of the temperature sensor, μ is the sewage viscosity coefficient, S t is the detection value of the salinity sensor, P h is the detection value of the pH sensor, P w1 is the detection value of the water flow pressure sensor 1, V w is the detection value of the water flow velocity sensor, S is the cross-sectional area of the jet pipe 43, P w2 is the detection value of the water flow pressure sensor 2, P a is the detection value of the air flow pressure sensor, V a is the detection value of the air flow velocity sensor;

[0087] Step 2: The data processing module calculates and compares the air flotation sedimentation ratio coefficient AS:

[0088] where AS is the air flotation sedimentation ratio coefficient, H1 is the detection value of the first acquisition unit, and H2 is the detection value of the second acquisition unit;

[0089] When AS < AS0, according to the air flotation coefficient A f calculate the pressurization coefficient P t :

[0090] where AS0 is the standard air flotation sedimentation ratio coefficient, P t is the pressurization coefficient;

[0091] Step 3: The control module controls the execution module to adjust the pressure in the pressurized gas pipeline 45 and the jet pipe 43 according to the pressurization coefficient.

[0092] The beneficial effects of the above technical solution are as follows: The air flotation component 3 makes the flocs float through tiny bubbles. Since the air flotation component 3 is mainly used to remove flocs from sewage, when there are较多 flocs precipitated, the load on the precipitation component 6 is较大. Therefore, by monitoring the precipitation and floating ratios of the flocs to monitor the working state of the air flotation component 3, when the precipitation and floating ratios exceed the expected values and there is较多 precipitation, the control module drives the execution module to change the air dissolution degree of the air flotation component 3, thereby changing the number of tiny bubbles generated, and then increasing the floating ratio of the flocs, and finally achieving the expected ratio of floating and precipitation;

[0093] The present invention uses the control module, data processing module, detection module and execution module to monitor the air flotation component 3 and the precipitation and floating ratios, and adjusts the air flotation component 3 according to the change value of the precipitation and floating ratios. This design can ensure the stable operation of the sewage treatment process and avoid the appearance of suspended substances in the subsequent water body.

[0094] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A wastewater treatment system for a thermal power plant, characterized in that: include: A tank body (1), wherein a coagulation component (2) is provided on the left side of the tank body (1), and a defloating component (5) and a sedimentation component (6) are provided on the right side of the tank body (1); the defloating component (5) is provided above the sedimentation component (6), and an air flotation component (3) is provided between the coagulation component (2) and the sedimentation component (6); and a dredging mechanism (8) is used to dredge and clean the inclined plate (63) in the sedimentation component (6); It also includes an aerosol monitoring component, which is used to monitor the aerosol situation in the air flotation component.

2. A wastewater treatment system for a thermal power plant according to claim 1, characterized in that: The coagulation component (2) comprises a flocculation baffle (21), the flocculation baffle (21) is fixed in the tank body (1), a support frame (22) is fixed above the tank body (1), a stirring motor (23) is installed on the support frame (22), a stirring rod (24) is installed at the output end of the stirring motor (23), a plurality of stirring blades (25) are bolted to the stirring rod (24), a dosing pipe (26) is provided on one side of the tank body (1), the dosing pipe (26) is fixed to the tank body through a pipe clamp (27), a uniform distribution pipe (28) is installed at the output end of the dosing pipe (26), a plurality of diffusion holes (29) are provided on the uniform distribution pipe (28), and a flow gap (210) is provided below the flocculation baffle (21).

3. A wastewater treatment system for a thermal power plant according to claim 1, characterized in that: The air flotation assembly (3) comprises an overflow weir plate (31), a guide plate (32) is arranged between the flocculation partition plate (21) and the overflow weir plate (31), the overflow weir plate (31) and the guide plate (32) are both fixed in the pool body (1), a guide tube (33) is installed at the center of the guide plate (32), a guide motor (34) is connected to the top of the guide tube (33), the guide motor (34) is bolted to a support frame (22) on the pool body (1), a plurality of flocculant tubes (35) are installed through the guide tube (33), an air flotation tube (36) is arranged between the guide plate (32) and the overflow weir plate (31), a pressure reducing valve air flotation nozzle (37) is installed at the bottom of the air flotation tube (36), the input end of the air flotation tube (36) is connected to the gas dissolving structure (4), and the gas dissolving structure (4) is installed on the pool body (1).

4. A wastewater treatment system for a thermal power plant according to claim 3, characterized in that: The aerosol structure (4) comprises an aerosol tank (41), which is fixedly mounted on the pool body (1); the water inlet end of the aerosol tank (41) is flange-connected with an expansion pipe (42); the water outlet end of the aerosol tank (41) is connected to an air flotation pipe (36); the top of the expansion pipe (42) is connected with a jet pipe (43); the input end of the jet pipe (43) is connected with a water pump (44); the middle input end of the jet pipe (43) is connected with a pressurized gas pipeline (45); the input end of the water pump (44) is connected with a return pipe (46); and the return pipe (46) is connected to the pool body (1).

5. A wastewater treatment system for a thermal power plant according to claim 1, characterized in that: The defloating assembly (5) comprises an electric transmission shaft (51), wherein the two electric transmission shafts (51) are rotatably connected between the tank bodies (1), sprockets (52) are symmetrically mounted on the two electric transmission shafts (51), the sprockets (52) between the two electric transmission shafts (51) are connected via a transmission chain (53), the sprockets (52) and the transmission chain (53) are meshed with each other, a plurality of foam scraping plates (54) are bolted between the transmission chains (53), a foam collecting groove (55) is mounted between the tank bodies (1), the foam scraping plates (54) and the foam collecting groove (55) are matched with each other, and one side of the foam collecting groove (55) is connected to a slag discharge pipe (56).

6. A wastewater treatment system for a thermal power plant according to claim 1, characterized in that: The sedimentation assembly (6) comprises an inclined partition wall (61), the inclined partition wall (61) is fixed on the pool body (1), a foam collecting groove (55) is arranged above the inclined partition wall (61), a plurality of support frames (62) are bolted to the lower part of the inclined partition wall (61), a plurality of inclined plates (63) are installed above the support frames (62), an overflow plate (64) is arranged above the plurality of inclined plates (63), the overflow plate (64) is installed on the pool body (1), a clean water outlet (65) is arranged at the overflow plate (64) of the pool body (1), a sedimentation cleaning structure (7) is arranged below the inclined plate (63), and a dredging mechanism (8) is arranged above the inclined plate (63).

7. A wastewater treatment system for a thermal power plant according to claim 6, characterized in that: The sedimentation cleaning structure (7) comprises a movable groove (71), wherein two movable grooves (71) are respectively arranged at two sides of the bottom of the pool body (1), and a lead screw rod (72) is rotatably connected in the two movable grooves (71), and one end of the lead screw rod (72) is connected to a cleaning motor (73), and the cleaning motor (73) is installed on the outside of the pool body (1). A movable partition (74) is threadedly connected to the lead screw rod (72), and the movable partition (74) and the pool body (1) cooperate with each other. A linkage rod (75) is fixedly connected between the two movable partitions (74), and a sedimentation scraper (76) is rotatably connected to the linkage rod (75). A limit card (77) is installed on the linkage rod (75), and the limit card (77) and the sedimentation scraper (76) cooperate with each other. A sedimentation groove (78) is arranged on the right side of the pool body (1), and a sewage discharge pipe (79) is arranged in the sedimentation groove (78).

8. A wastewater treatment system for a thermal power plant according to claim 6, characterized in that: The dredging mechanism (8) comprises a second lead screw (81), the second lead screw (81) is rotatably connected to the front and rear sides of the pool body (1), one end of the second lead screw (81) is connected to a dredging motor (82), the dredging motor (82) is installed outside the pool body (1), a linkage plate (83) is threadedly connected to the second lead screw (81), a plurality of dredging displacement plates (84) are fixedly connected below the linkage plate (83), and the dredging displacement plates (84) are slidably connected between adjacent inclined plates (63).

9. A wastewater treatment system for a thermal power plant according to claim 1, characterized in that: The aerosol monitoring component includes a control module, a data processing module, a detection module and an execution module. The detection module includes: Water flow pressure sensor 1: used to detect the water flow pressure in the jet tube (43), which is arranged in the jet tube (43); Water flow pressure sensor 2: used to detect the water flow pressure in the expansion tube (42), and disposed in the expansion tube (42); A water flow velocity sensor: used for detecting the water flow velocity in the jet tube (43), and arranged in the jet tube (43); An air flow pressure sensor: used to detect the air flow pressure in the pressurized gas pipeline (45), and arranged in the pressurized gas pipeline (45); An air flow velocity sensor: used for detecting the air flow velocity in the pressurized gas pipeline (45), and arranged in the pressurized gas pipeline (45); A temperature sensor: used for detecting the temperature of the water flow in the jet tube (43), and arranged in the jet tube (43); A salinity sensor: used for detecting the salinity of the water flow in the jet tube (43), and arranged in the jet tube (43); pH sensor: used to detect the pH of water flow in the jet tube (43), which is arranged in the jet tube; A first acquisition unit is used to acquire the flocculent air floating thickness, and is arranged in the tank body (1); A second acquisition unit is used to acquire the thickness of floc sedimentation, and is arranged in the tank body (1); The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution module to work based on the data results of the data processing module.

10. A wastewater treatment system for a thermal power plant according to claim 9, characterized in that: The control module controls the execution module based on the data results of the data processing module, including the following steps: Step 1: Calculate the flotation coefficient A of the flotation component (3) based on the data of the water flow pressure sensor 1, the water flow pressure sensor 2, the water flow velocity sensor, the air flow pressure sensor, the air flow velocity sensor, the temperature sensor, the salinity sensor, the pH value sensor, the first acquisition unit and the second acquisition unit. f : Among them: A f is the flotation coefficient of the flotation component, k is the flotation loss coefficient, T is the temperature sensor detection value, μ is the sewage viscosity coefficient, S t is the detection value of the salinity sensor, P h is the detection value of the pH sensor, P w1 is the detection value of water flow pressure sensor 1, V w is the detection value of the water flow velocity sensor, S is the cross-sectional area of ​​the jet tube (43), P w2 is the detection value of water flow pressure sensor 2, P a is the detection value of the airflow pressure sensor, V a is the detection value of the air flow velocity sensor; Step 2: The data processing module calculates and compares the air flotation and precipitation ratio coefficient AS: Where AS is the air flotation-sedimentation ratio coefficient, H1 is the detection value of the first acquisition unit, and H2 is the detection value of the second acquisition unit; When AS < AS0, according to the air flotation coefficient A f calculate the pressurization coefficient P t : Where AS0 is the standard air flotation sedimentation ratio coefficient, P t is the pressure coefficient; Step 3: The control module controls the execution module to adjust the pressure in the pressurized gas pipeline (45) and the jet tube (43) according to the pressurization coefficient.

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