Sewage treatment sedimentation tank and sewage treatment system

Abstract

The invention relates to the technical field of sedimentation tanks, in particular to a sewage treatment sedimentation tank which comprises a tank body, a water inlet base body and a cleaning body, the water inlet base body is fixedly mounted in the center of the tank body, a water inlet flow channel is formed in the water inlet base body, and the cleaning body is rotationally mounted below the water inlet base body; the water inlet flow channel comprises a water inlet energy dissipation section, a horizontal flow section and an impurity intercepting section which are sequentially communicated in the water inlet direction, the water inlet energy dissipation section is of a vertically-arranged wave structure, the cross section of the impurity intercepting section is in a funnel shape, a reagent cavity communicated with the water inlet flow channel is formed in the side wall of the water inlet flow channel, and a movable wall is vertically and slidably installed on the side, close to the water inlet flow channel, of the reagent cavity; a cleaning body is rotationally mounted below the water inlet base body, the cleaning body extrudes the movable arm to vertically move during rotation so as to intermittently communicate with the water inlet flow channel and the reagent cavity for intermittent medicine injection, and the cleaning body relatively moves to extrude and puncture sludge while extruding the movable arm; the problem that the water quality is influenced by suspended matter increase caused by floating of gas filled in the sludge in the sedimentation tank is solved.

Description

Technical Field

[0001] The invention relates to the technical field of sedimentation tanks, in particular to a sewage treatment sedimentation tank and a sewage treatment system. Background Art

[0002] In the process of treating sewage in existing sedimentation tanks, anaerobic microorganisms at the bottom of the sedimentation tank will decompose organic matter through metabolic methods such as fermentation, thereby producing gases such as carbon dioxide, methane or nitrogen. The gases will fill the sludge, causing the sludge to expand and reduce the density of the sludge, which will then cause the sludge to float, ultimately increasing the suspended matter in the sedimentation tank and affecting the water quality.

[0003] Therefore, the present invention provides a sewage treatment sedimentation tank and a sewage treatment system to solve the above problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the sludge in the sedimentation tank is filled with gas and floats up, resulting in an increase in suspended matter that affects the water quality.

[0005] The present invention provides the following technical solutions: a sewage treatment sedimentation tank, comprising a tank body, a water inlet matrix and a cleaning body, wherein the water inlet matrix is ​​fixedly installed at the center of the tank body, a water inlet flow channel is provided inside the water inlet matrix, a cleaning body is rotatably installed below the water inlet matrix, the water inlet flow channel comprises a water inlet energy dissipation section, a horizontal flow section and an impurity interception section which are sequentially connected along the water inlet direction, the water inlet energy dissipation section is a vertically arranged wave structure, the horizontal flow section is a horizontal structure, the cross-section of the impurity interception section is funnel-shaped, a reagent cavity connected to the water inlet flow channel is provided on the side wall of the water inlet flow channel, a moving wall is vertically slidably installed on the reagent cavity close to the side of the water inlet flow channel, a cleaning body is rotatably installed below the water inlet matrix, the cleaning body squeezes the moving wall during rotation to move vertically to intermittently connect the water inlet flow channel and the reagent cavity for intermittent injection of medicine, and the cleaning body moves relatively to squeeze and puncture the sludge while squeezing the moving arm. After the sewage enters the impurity interception section, the solid impurities in the sewage with a slow flow rate are located in the lower layer of the sewage, and are thus intercepted at the lowest level of the funnel-shaped impurity interception section, thereby improving the water quality of the sewage entering the sedimentation tank, which is beneficial to improving the effect of the sedimentation tank in treating sewage.

[0006] The cleaning assembly includes a driving motor, a cleaning body and an extrusion body. The driving motor is fixedly installed under the tank body, the driving gear is fixedly installed on the output shaft of the driving motor, the cleaning body is rotatably installed on the outer side of the water inlet pipe, a driven gear ring is axially fixedly installed under the cleaning body, the driving gear is meshed with the driven gear ring, an extrusion body is hinged on the surface of the cleaning body, and a hydraulic damper is hinged between the cleaning body and the extrusion body. The extrusion body squeezes the sludge impurities between the cleaning body and the extrusion body. On the one hand, it can squeeze the sludge to increase the density and cohesion to prevent it from floating, thereby improving the effect of the sedimentation tank in treating sewage. On the other hand, it can discharge the nitrogen generated by the microbial nitrification reaction in the sludge to prevent the sludge from swelling and loosening and floating again.

[0007] The impurity interception section includes a front section, a middle section and a rear section which are fixedly connected in sequence along the water inlet direction, and the horizontal height and length of the rear section are both greater than the front section, so that the sewage can climb the slope and overflow in the process of flowing through the rear section, and the impurities in the sewage are intercepted by their own weight and rolled into the middle section for storage, so that when the sewage enters the sedimentation tank, the amount of impurities entering can be reduced, which is conducive to improving the sewage treatment effect of the sedimentation tank.

[0008] The rear section is in a trapezoidal structure, and the width of the front section is equal to or less than the shortest parallel side of the rear section trapezoidal structure. The rear section is larger than the front section through the trapezoidal structure, so that the sewage fills the expanded space to reduce the sewage flow rate, and then, under the condition of unchanged sewage inlet volume, the impurity precipitation effect is further improved by reducing the sewage flow rate, and the kinetic energy of impurities is reduced, so that they are more easily intercepted by the rear section and rolled back to the middle section.

[0009] A connecting hole connecting the water inlet channel and the reagent chamber is provided on the surface of the movable wall. An inclined body intermittently contacting the cleaning body is fixedly installed below the movable wall, and the inclined body passes through the water inlet matrix.

[0010] A sliding body that matches the bevel is slidably installed above the extrusion body, and the upper and lower ends of the sliding body are both inclined structures. A movable plate is slidably installed on the inclined structure side of the lower end of the sliding body, and the end of the movable plate close to the sliding body is an inclined structure that matches each other. A plurality of knife bodies are fixedly installed on the surface of the movable plate, and the knife bodies slide through the extrusion body.

[0011] The cleaning body includes a main body and a collecting rod. The main body is rotatably mounted on the surface of the water inlet base body. The collecting rod is fixedly mounted on the front section of the main body along the rotation direction. The collecting rod is installed at an angle with the main body. The inclined guidance of the angle allows the sludge to move toward the center of the sedimentation tank, so that it can be discharged from the sewage outlet opened in the center of the sedimentation tank, which is conducive to cleaning and discharging the sludge by the cleaning body.

[0012] The collecting rod is divided into an extrusion section and an extension section. The end of the extrusion section close to the side wall of the sedimentation tank is fixedly installed with the extension section, and the angle of the extension section is greater than that of the extrusion section. The extrusion section cooperates with the extrusion body to slightly extrude the sludge, thereby increasing the sludge density by a small amount and discharging the air in the sludge, thereby preventing the sludge from floating up and reducing the suspended matter in the sedimentation tank. The angle of the extension section is greater than that of the extrusion section, which can increase the speed of the sludge moving to the center of the sedimentation tank without changing the speed, thereby improving the efficiency of cleaning the sludge.

[0013] The middle section is arranged obliquely in a direction perpendicular to the water inlet direction, and a sewage outlet is provided at the horizontal lower end of the middle section.

[0014] The present invention also provides a sewage treatment system comprising the sewage treatment sedimentation tank, wherein a pretreatment tank is connected in front of the sewage treatment sedimentation tank, and a post-treatment tank and a sludge treatment tank are arranged in parallel behind the sewage treatment sedimentation tank. The pre-treatment tank is provided with a plurality of groups of grid filter tanks along the sewage flow direction, and the grid spacing in the plurality of groups of grid filter tanks decreases successively. The post-treatment tank comprises a parallel aeration tank and a biofilm reactor, and a parallel pipe is connected between the aeration tank and the biofilm reactor.

[0015] The beneficial effects of the present invention are as follows: 1. The cleaning component of the present invention can cooperate with the water inlet matrix during the process of cleaning the sludge at the bottom of the sedimentation tank, so that when cleaning the sludge in the sedimentation tank, the sewage entering the water inlet matrix is ​​automatically and quantitatively added with chemicals, and the mixing chemicals are started for flocculation when the sewage enters, which is beneficial to improve the sedimentation efficiency and mixing uniformity, thereby improving the quality of the effluent from the sedimentation tank; and, while automatically adding chemicals to the sewage entering the water inlet matrix, the sludge at the bottom of the sedimentation tank can also be squeezed and punctured, thereby releasing the air in the sludge to prevent the sludge from floating, thereby reducing the suspended matter in the sedimentation tank and improving the quality of the effluent from the sedimentation tank.

[0016] 2. The present invention can intercept and filter impurities in sewage before it enters the sedimentation tank through the coordination of the water inlet energy dissipation section, the horizontal flow section and the impurity interception section in the water inlet matrix, thereby improving the quality of sewage in the sedimentation tank and being beneficial to improving the quality of the effluent from the sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 It is a structural schematic diagram of the cleaning component of the present invention; Figure 4 It is a schematic diagram of the top cross-sectional structure of the water inlet channel and the reagent chamber in the water inlet matrix of the present invention; Figure 5 It is a schematic cross-sectional structure diagram of the water inlet matrix and the reagent chamber being interconnected according to the present invention; Figure 6 It is a schematic cross-sectional structure diagram of the movable wall resetting and blocking the water inlet matrix and the reagent chamber of the present invention; Figure 7 It is a schematic diagram of the inclined surface structure in which the italic body, the sliding body and the moving plate cooperate with each other in the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the extruded body of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional structure of the impurity interception section of the present invention; Fig.10 The figure is a schematic diagram of the sewage treatment process of the sewage treatment system of the present invention.

[0019] In the figure: 1. pool body; 11. water inlet pipe; 12. sewage pipe; 2. water inlet matrix; 21. water inlet energy dissipation section; 211. liquid inlet hole; 22. horizontal flow section; 23. impurity interception section; 231. front section; 232. middle section; 233. rear section; 24. reagent chamber; 25. moving wall; 251. connecting hole; 252. italic body; 26. slide; 3. cleaning assembly; 31. driving motor; 311. driving gear; 32. cleaning body; 321. driven gear ring; 322. main body; 323. collecting rod; 324. extrusion section; 325. extension section; 33. extrusion body; 331. sliding body; 332. moving plate; 333. spring; 334. knife body; 34. hydraulic damping; 4. slag discharge plate; 41. slag discharge port. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "back" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. Such terms are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0023] It should also be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example 1: Based on the technical problem that the sludge in the sedimentation tank is filled with gas and floats up, causing the increase of suspended matter and affecting the water quality, see Figure 1 and 2 A sewage treatment sedimentation tank and a sewage treatment system, comprising a tank body 1, a water inlet matrix 2 and a cleaning component 3, wherein the water inlet matrix 2 is fixedly installed at the center of the tank body 1, an inlet flow channel is opened inside the water inlet matrix 2, and a cleaning component 3 is rotatably installed below the water inlet matrix 2, the inlet flow channel comprises an inlet energy dissipation section 21, a horizontal flow section 22 and an impurity interception section 23 which are sequentially connected along the water inlet direction, the inlet energy dissipation section 21 is a vertically arranged wave structure, and the horizontal flow section 22 is a horizontal structure, The cross-section of the impurity intercepting section 23 is funnel-shaped, and a reagent chamber 24 connected to the water inlet channel is provided on the side wall of the water inlet channel. A movable wall 25 is vertically slidably installed on the reagent chamber 24 close to the side of the water inlet channel. A cleaning component 3 is rotatably installed under the water inlet matrix 2. The cleaning component 3 squeezes the movable wall 25 to move vertically during rotation to intermittently connect the water inlet channel and the reagent chamber 24 for intermittent drug injection. The cleaning component 3 moves relatively while squeezing the movable arm to squeeze and puncture the sludge.

[0025] See also Figure 5 and 6The water inlet energy dissipation section 21 is provided with a liquid inlet hole 211 on the side close to the reagent chamber 24, and the surface of the movable wall 25 is provided with a connecting hole 251. After the movable wall 25 moves upward, the connecting hole 251 will be aligned with the liquid inlet hole 211, thereby connecting the reagent chamber 24 and the water inlet energy dissipation section 21, and then the reagent can be added to the water inlet energy dissipation section 21.

[0026] See also Figure 1 A water inlet pipe 11 for conveying sewage into the water inlet matrix 2 is fixedly installed below the tank body 1, and a sewage discharge pipe 12 for discharging sludge from the bottom of the tank body 1 is fixedly installed at the center below the tank body 1.

[0027] See also Figure 2 , Figure 4 and Figure 6 It should be noted that the movable wall 25 is installed in the reagent chamber 24 by opening a slide groove 26 on the opposite side, and the two ends of the slide groove 26 are the stop points for the movable wall 25 to move up and down.

[0028] See also Figure 1 It should be noted that the scum on the surface of the sedimentation tank is collected by the slag discharge plate 4 in the prior art and discharged from the slag discharge port 41, which will not be described in detail here.

[0029] Sewage is input from the water inlet matrix 2 at the center of the tank body 1. The sewage first enters the water inlet energy dissipation section 21 of the vertical wave structure in the water inlet flow channel. The kinetic energy of the sewage is slowed down and eliminated by the water inlet energy dissipation section 21 of the vertical wave structure, thereby reducing the flow rate of the sewage, which is conducive to the precipitation of solid impurities. After the sewage flows through the water inlet energy dissipation section 21 of the vertical wave structure, it enters the horizontal flow section 22, and then enters the impurity interception section 23 from the horizontal flow section 22. After the sewage enters the impurity interception section 23, the solid impurities in the sewage with a slow flow rate are located in the lower layer of the sewage, and are thus intercepted at the lowest level of the funnel-shaped impurity interception section 23, thereby improving the water quality of the sewage entering the tank body 1 for precipitation, which is conducive to improving the effect of the sedimentation tank in treating sewage.

[0030] After the sewage enters the sedimentation tank, the cleaning component 3 can rotate to clean and scrape away impurities, such as sludge impurities, deposited at the bottom of the sedimentation tank. The impurities cleaned by the cleaning component 3 can be collected by the sludge storage tank in the prior art for partial transport and partial return.

[0031] During the rotation of the cleaning component 3, the slidingly mounted moving wall 25 can be driven to move up and down, thereby intermittently connecting the water inlet channel and the reagent chamber 24, thereby realizing intermittent injection of the reagent. The reagent described in the embodiment of the present disclosure is a flocculant used in the prior art for treating sewage. By intermittently controlling the moving wall 25 to move up and down through the movement of the cleaning component 3, the injection of the reagent can be quantitatively controlled during the process of the cleaning component 3 cleaning the impurities at the bottom of the sedimentation tank, which is conducive to the stable quantitative injection of the flocculant reagent and improves the effect of the sedimentation tank in treating impurities.

[0032] See also Figure 2 and 3 The cleaning assembly 3 includes a driving motor 31, a cleaning body 32 and an extrusion body 33. The driving motor 31 is fixedly installed below the tank body 1, and a driving gear 311 is fixedly installed on the output shaft of the driving motor 31. The cleaning body 32 is rotatably installed on the outer side of the water inlet pipe 11. A driven gear ring 321 is axially fixedly installed below the cleaning body 32. The driving gear 311 meshes with the driven gear ring 321. An extrusion body 33 is hinged on the surface of the cleaning body 32, and a hydraulic damper 34 is hinged between the cleaning body 32 and the extrusion body 33. After the driving motor 31 is started, the driving gear 311 of the output shaft meshes with the driven gear ring 321 to drive the cleaning body 32 to rotate and scrape the sludge at the bottom of the sedimentation tank.

[0033] During the rotation of the cleaning body 32 and the extrusion body 33, the upper side of the extrusion body 33 is intermittently in contact with the lower side of the movable wall 25, thereby driving the movable wall 25 to move upward to connect the water inlet channel and the reagent chamber 24. After the movable wall 25 moves upward, it stops moving, and the rotation of the extrusion body 33 is blocked and approaches the cleaning body 32, so that the extrusion body 33 squeezes the sludge impurities between the cleaning body 32 and the extrusion body 33. On the one hand, it can squeeze the sludge to increase the density and cohesion to prevent it from floating, thereby improving the effect of the sedimentation tank in treating sewage. On the other hand, it can discharge the nitrogen produced by the microbial nitrification reaction in the sludge to prevent the sludge from swelling and loosening and floating again.

[0034] After the extrusion body 33 rotates to release the contact with the bottom of the moving wall 25, the extrusion body 33 is slowly reset by the hydraulic damper 34 to prevent the sludge at the bottom of the sedimentation tank from being stirred up. In addition, the hydraulic damper 34 has a limited range for the angle of the extrusion body 33 rotating close to the cleaning body 32, thereby preventing the extrusion body 33 from over-extruding the sludge so that the sludge agglomeration force is too large, and preventing the sludge from being too hard to be transported and processed later, and ensuring that the sludge remains in a moderately loose state after extrusion, which is convenient for discharge and transportation and not easy to float.

[0035] It should be noted that, during the process in which the extrusion body 33 contacts the movable wall 25, the movable wall 25 and the extrusion body 33 exert force on each other. Since the hydraulic damping rod 34 fixedly installed between the extrusion body 33 and the cleaning body 32 can provide a certain supporting force, during the process in which the movable wall 25 and the extrusion body 33 contact each other, the movable wall 25 moves up first, and then after the movable wall 25 moves up, it presses against the extrusion body 33 and exerts resistance, so that the extrusion body 33 stops moving while the cleaning body 32 continues to rotate, thereby making the extrusion body 33 and the movable body approach each other to squeeze the sludge.

[0036] It should be noted that the movable wall 25 can be reset and moved downward by its own weight after moving upward.

[0037] See also Figure 2 and 9 The impurity interception section 23 includes a front section 231, a middle section 232 and a rear section 233 which are fixedly connected in sequence along the water inlet direction, and the horizontal height and length of the rear section 233 are both greater than the front section 231. When the sewage enters the impurity interception section 23 through the water inlet energy dissipation section 21 and the advection section 22, it first enters the front section 231. Since the cross sections of the front section 231, the middle section 232 and the rear section 233 form a funnel shape, and the horizontal height and length of the rear section 233 are both greater than the front section 231, the sewage climbs the slope and overflows in the process of flowing through the rear section 233, so that the impurities in the sewage are intercepted by their own weight and roll into the middle section 232 for storage, so that the amount of impurities entering the sewage can be reduced when entering the sedimentation tank, which is conducive to improving the sewage treatment effect of the sedimentation tank.

[0038] See also Fig. 9 The rear section 233 is in a trapezoidal structure, and the width of the front section 231 is equal to or less than the shortest parallel side of the trapezoidal structure of the rear section 233. This allows the sewage to enter the area where the space suddenly expands during the process of entering from the front section 231 to the rear section 233, so that the rear section 233 is larger than the space of the front section 231 through the trapezoidal structure, so that the sewage fills the suddenly expanded space to reduce the sewage flow rate, and then, under the condition that the sewage input amount remains unchanged, the impurity precipitation effect is further improved by reducing the sewage flow rate, and the kinetic energy of the impurities is reduced, so that they are more easily intercepted by the rear section 233 and rolled back to the middle section 232.

[0039] See also Figure 5 and 6The surface of the movable wall 25 is provided with a connecting hole 251 connecting the water inlet channel and the reagent chamber 24. An inclined body 252 intermittently contacts the cleaning body 32 and is fixedly installed below the movable wall 25. The inclined body 252 passes through the water inlet matrix 2. A sliding body 331 matching the inclined body 252 is slidably installed above the extrusion body 33. A one-way valve is fixedly installed in the connecting hole 251 to prevent sewage from entering the reagent chamber 24.

[0040] During the process of the extrusion body 33 rotating with the cleaning body 32, the sliding body 331 above the extrusion body 33 contacts the inclined body 252 and drives the inclined body 252 and the movable wall 25 to move upward, thereby driving the movable wall 25 to move upward through the upwardly moving inclined body 252 to connect the water inlet channel and the reagent chamber 24, so that the reagent in the reagent chamber 24 enters the water inlet channel and mixes with the sewage, and then the precipitation effect of impurities in the sewage can be improved by adding reagents, thereby improving the effect of the sedimentation tank in treating sewage.

[0041] See also Figure 3 The upper and lower ends of the sliding body 331 are both inclined structures. A moving plate 332 is slidably installed on the inclined structure side of the lower end of the sliding body 331. The end of the moving plate 332 close to the sliding body 331 is a mutually matching inclined structure. A spring 333 is fixedly installed between the moving plate 332 and the extrusion body 33. A plurality of knife bodies 334 are fixedly installed on the surface of the moving plate 332. The knife bodies 334 slide through the extrusion body 33.

[0042] When the sliding body 331 above the extrusion body 33 contacts the inclined body 252 on the lower side of the movable wall 25, and the movable wall 25 moves up to the stop point to drive the extrusion body 33 to rotate close to the cleaning body 32 to squeeze the sludge, the extrusion body 33 is supported by the hydraulic damping rod 34 and stops moving, thereby increasing the force applied to the sliding body 331 during the contact between the sliding body 331 and the inclined body 252, so that the sliding body 331 continues to move downward to overcome the resistance of the spring 333 and squeeze the inclined surface structure of the moving plate 332 to move horizontally, thereby driving the moving plate 332 and the knife body 334 to move horizontally, so that when the extrusion body 33 approaches the cleaning body 32, the knife body 334 can extend out to puncture the sludge, thereby further releasing the gas in the sludge and preventing the sludge from floating up.

[0043] See also Figure 3The cleaning body 32 includes a main body 322 and a collecting rod 323. The main body 322 is rotatably mounted on the surface of the water inlet base 2. The collecting rod 323 is fixedly mounted on the front section 231 of the main body 322 along the rotation direction. The collecting rod 323 is installed at an angle with the main body 322. The collecting rod 323 can guide the sludge to move toward the center of the sedimentation tank through the inclined angle during the sludge cleaning process, so that the sludge can be discharged from the sewage outlet opened in the center of the sedimentation tank, which is conducive to the cleaning body 32 to clean and discharge the sludge.

[0044] See also Figure 3 The collecting rod 323 is divided into an extrusion section 324 and an extension section 325. The extension section 325 is fixedly installed at the end of the extrusion section 324 close to the side wall of the sedimentation tank, and the angle of the extension section 325 is greater than that of the extrusion section 324. The extrusion section 324 and the position of the extrusion body 33 closest to the cleaning body 32 are parallel to each other, so that the extrusion section 324 and the extrusion body 33 can cooperate with each other to slightly extrude the sludge, thereby increasing the density of the sludge by a small amount and discharging the air in the sludge, thereby preventing the sludge from floating and reducing the suspended matter in the sedimentation tank. The angle of the extension section 325 is greater than that of the extrusion section 324, which can increase the moving speed of the sludge to the center of the sedimentation tank without changing the speed, thereby improving the efficiency of cleaning the sludge.

[0045] It should be noted that the length of the extrusion body 33 is the same as that of the extrusion section 324 .

[0046] The middle section 232 is arranged tilted in a direction perpendicular to the water inlet, and a sewage outlet is provided at the horizontal lower end of the middle section 232. The tilted middle section 232 can facilitate the movement of sludge toward the sewage outlet, thereby facilitating the discharge of sludge. It should be noted that the specific operation means for discharging and cleaning sludge from the sewage outlet is a prior art and will not be described in detail here.

[0047] It should be noted that the entry of sewage, the discharge of sludge and the discharge of clean water in the embodiments of the present disclosure are all existing technologies and will not be elaborated on here.

[0048] See also Fig.10 The disclosed embodiment also provides a sewage treatment system including the sewage treatment sedimentation tank, wherein a pretreatment tank is connected in front of the sewage treatment sedimentation tank, and a post-treatment tank and a sludge treatment tank are arranged in parallel behind the sewage treatment sedimentation tank. The pre-treatment tank is provided with a plurality of groups of grids along the sewage flow direction, and the spacing between the plurality of groups of grids decreases successively. The post-treatment tank includes a parallel aeration tank and a biofilm reactor, and a parallel pipe is connected between the aeration tank and the biofilm reactor.

[0049] Multiple groups of grilles with decreasing spacing can filter impurities of different volumes in layers while ensuring the filtering effect, thereby avoiding reducing the filtering pressure of the grille and preventing the grille from being blocked when filtering impurities.

[0050] The parallel aeration tank and biofilm reactor can be selected as needed according to water quality, thereby improving the effect of sewage treatment. A parallel pipeline is connected between the aeration tank and the biofilm reactor, so that when treating sewage, the sewage can be treated in turn by the aeration tank and the biofilm reactor after sedimentation, further improving the sewage treatment effect.

[0051] It should be noted that the specific structures of the grid for intercepting impurities, the aeration tank and the biofilm reactor are prior arts and will not be elaborated in detail here.

[0052] Working process: In the process of treating sewage in the sedimentation tank, the sewage enters the water inlet matrix 2 in the middle of the sedimentation tank from the water inlet pipe at the bottom of the sedimentation tank. The sewage first enters the water inlet energy dissipation section 21 of the vertical wave structure in the water inlet matrix 2. The kinetic energy of the sewage is slowed down and eliminated by the water inlet energy dissipation section 21 of the vertical wave structure, thereby reducing the flow rate of the sewage, which is conducive to the precipitation of solid impurities. After the sewage flows through the water inlet energy dissipation section 21 of the vertical wave structure, it enters the horizontal flow section 22, and then enters the impurity interception section 23 from the horizontal flow section 22. After the sewage enters the impurity interception section 23, the solid impurities in the sewage with a slow flow rate are located in the lower layer of the sewage, so that the sewage overflows in the process of flowing through the rear section 233, so that the impurities in the sewage are intercepted and rolled into the middle section 232 due to their own weight, so that the sewage can reduce the amount of impurities entering when entering the sedimentation tank, which is conducive to improving the effect of sewage treatment in the sedimentation tank.

[0053] Furthermore, the width of the front section 231 is equal to or less than the shortest parallel side of the trapezoidal structure of the rear section 233, so that the sewage can enter the area of ​​the sudden expansion of the space when entering from the front section 231 to the rear section 233, so that the rear section 233 is larger than the space of the front section 231 through the trapezoidal structure, so that the sewage fills the suddenly expanded space to reduce the sewage flow rate, and then when the amount of sewage entering remains unchanged, the impurity precipitation effect is further improved by reducing the sewage flow rate, and the kinetic energy of impurities is reduced, so that they are more easily intercepted by the rear section 233 and rolled back to the middle section 232. The middle section 232, which is arranged obliquely in a direction perpendicular to the water inlet, can facilitate the movement of sludge toward the sewage outlet, thereby facilitating the discharge of sludge.

[0054] When the sewage enters the sedimentation tank, the driving motor 31 is started and the driving gear 311 of the output shaft engages with the driven gear ring 321 to drive the cleaning body 32 and the extruding body 33 to rotate, thereby scraping and cleaning the sludge at the bottom of the sedimentation tank. During the rotation of the cleaning body 32 and the extruding body 33, the sliding body 331 above the extruding body 33 contacts the inclined body 252 and drives the inclined body 252 and the moving wall 25 to move upward. After the moving wall 25 moves to the dead point, it connects the water inlet flow channel and the reagent chamber 24, so that the reagent in the reagent chamber 24 enters the water inlet flow channel and mixes with the sewage, and then the precipitation effect of impurities in the sewage can be improved by adding reagents, thereby improving the sewage treatment effect of the sedimentation tank.

[0055] After the movable wall 25 moves to the stop point, it cannot move. The inclined body 252 of the movable wall 25 blocks the sliding body 331 and the extrusion body 33. At this time, the spring 333 and the movable plate 332 exert force on the sliding body 331, so that the sliding body 331 remains in place and does not move downward, so that the extrusion body 33 stops rotating while the cleaning body 32 continues to rotate, so that the extrusion body 33 approaches the cleaning body 32 and cooperates with the extrusion section 324 to slightly squeeze the sludge, thereby slightly increasing the sludge density and expelling the air in the sludge, thereby preventing the sludge from floating up and reducing the suspended matter in the sedimentation tank.

[0056] After the extrusion body 33 rotates and approaches the cleaning body 32 to squeeze the sludge, the extrusion body 33 is supported by the hydraulic damping rod 34 to stop moving, thereby increasing the force applied to the sliding body 331 during the contact between the sliding body 331 and the inclined body 252, and then the sliding body 331 overcomes the resistance of the spring 333 and the moving plate 332 and continues to move downward, thereby squeezing the inclined surface structure of the moving plate 332 to move horizontally, thereby driving the moving plate 332 and the blade body 334 to move horizontally, so that during the process of the extrusion body 33 approaching the cleaning body 32, the blade body 334 can extend out to squeeze and puncture the sludge, and then can further release the gas in the sludge to prevent the sludge from floating, which is beneficial to improving the effect of the sedimentation tank in treating sewage and improving the effluent quality.

[0057] The sludge in the sedimentation tank is collected by the cleaning body 32 and discharged by relying on the existing technology, while the clarified clean water is discharged by overflow from the slag retaining plates and triangular weir plates in the existing technology around it.

[0058] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A sewage treatment sedimentation tank, comprising a tank body (1), a water inlet matrix (2) and a cleaning component (3), wherein the center of the tank body (1) is fixedly mounted with the water inlet matrix (2), the water inlet matrix (2) is provided with a water inlet flow channel, and the cleaning component (3) is rotatably mounted below the water inlet matrix (2), characterized in that: The water inlet flow channel comprises a water inlet energy dissipation section (21), a horizontal flow section (22) and an impurity interception section (23) which are sequentially connected along the water inlet direction; the water inlet energy dissipation section (21) is a vertically arranged wave structure; the horizontal flow section (22) is a horizontal structure; the impurity interception section (23) has a funnel-shaped cross section; a reagent chamber (24) connected to the water inlet flow channel is provided on the side wall of the water inlet flow channel; a moving wall (25) is vertically slidably mounted on the reagent chamber (24) near the side of the water inlet flow channel; a cleaning component (3) is rotatably mounted below the water inlet base (2); the cleaning component (3) squeezes the moving wall (25) during rotation to vertically move intermittently to connect the water inlet flow channel and the reagent chamber (24) for intermittent injection of drugs; and the cleaning component (3) moves relatively to squeeze and puncture the sludge while squeezing the moving arm.

2. A sewage treatment sedimentation tank according to claim 1, characterized in that: The cleaning assembly (3) comprises a driving motor (31), a cleaning body (32) and an extrusion body (33); the driving motor (31) is fixedly mounted below the pool body (1); a driving gear (311) is fixedly mounted on the output shaft of the driving motor (31); a cleaning body (32) is rotatably mounted on the outside of the water inlet pipe (11); a driven gear ring (321) is axially fixedly mounted below the cleaning body (32); the driving gear (311) meshes with the driven gear ring (321); an extrusion body (33) is hingedly mounted on the surface of the cleaning body (32); and a hydraulic damper (34) is hingedly mounted between the cleaning body (32) and the extrusion body (33).

3. A sewage treatment sedimentation tank according to claim 2, characterized in that: The impurity interception section (23) comprises a front section (231), a middle section (232), and a rear section (233) which are fixedly connected in sequence along the water inlet direction, and the horizontal height and length of the rear section (233) are both greater than those of the front section (231).

4. A sewage treatment sedimentation tank according to claim 3, characterized in that: The rear section (233) is in a trapezoidal structure, and the width of the front section (231) is equal to or smaller than the shortest parallel side of the trapezoidal structure of the rear section (233).

5. A sewage treatment sedimentation tank according to claim 4, characterized in that: A connecting hole (251) connecting the water inlet channel and the reagent chamber (24) is provided on the surface of the movable wall (25). An inclined body (252) intermittently in contact with the cleaning body (32) is fixedly mounted below the movable wall (25). The inclined body (252) passes through the water inlet matrix (2).

6. A sewage treatment sedimentation tank according to claim 5, characterized in that: A sliding body (331) matching the inclined body (252) is slidably mounted above the extrusion body (33); both upper and lower ends of the sliding body (331) are inclined surface structures; a moving plate (332) is slidably mounted on the inclined surface structure side at the lower end of the sliding body (331); the end of the moving plate (332) close to the sliding body (331) is an inclined surface structure matching each other; a plurality of knife bodies (334) are fixedly mounted on the surface of the moving plate (332); the knife bodies (334) slide through the extrusion body (33).

7. A sewage treatment sedimentation tank according to claim 6, characterized in that: The cleaning body (32) comprises a main body (322) and a collecting rod (323); the main body (322) is rotatably mounted on the surface of the water inlet base (2); the collecting rod (323) is fixedly mounted on the front section (231) of the main body (322) along the rotation direction; the collecting rod (323) is mounted at an angle to the main body (322).

8. A sewage treatment sedimentation tank according to claim 7, characterized in that: The collecting rod (323) is divided into an extrusion section (324) and an extension section (325); the extension section (325) is fixedly mounted at the end of the extrusion section (324) close to the side wall of the sedimentation tank; the included angle of the extension section (325) is greater than that of the extrusion section (324).

9. A sewage treatment sedimentation tank according to claim 8, characterized in that: The middle section (232) is arranged obliquely in a direction perpendicular to the water inlet direction, and a sewage outlet is provided at the horizontal lower end of the middle section (232).

10. A sewage treatment system, characterized in that: It comprises the sewage treatment sedimentation tank as claimed in any one of claims 1 to 9, wherein a pretreatment tank is connected in front of the sewage treatment sedimentation tank, a post-treatment tank and a sludge treatment tank are arranged in parallel at the rear of the sewage treatment sedimentation tank, the pre-treatment tank is provided with a plurality of groups of grid filter tanks along the sewage flow direction, the grid spacings in the plurality of groups of grid filter tanks decrease successively, the post-treatment tank comprises a parallel aeration tank and a biofilm reactor, and a parallel pipe is connected between the aeration tank and the biofilm reactor.

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