A circulating sewage treatment pool

Abstract

The present invention relates to a circulating sewage treatment tank, comprising a tank body, wherein the tank body is provided with a pretreatment tank, a reaction tank, a sedimentation tank, and a clear water tank. The sedimentation tank is provided with a reflux pump for pumping muddy water back to the connection point between the pretreatment tank and the reaction tank. The sedimentation tank is provided with a support assembly, a lifting assembly, and a traction device, wherein the traction device is used to intermittently pull a drop to lift it at equal intervals. The present invention provides a shell and an intermittently lifted drop to enable the shell to locate the position of the sludge layer, so that the shell can rise and fall with the position of the sludge layer, and suck muddy water near the top of the sludge layer. This can ensure, to a certain extent, the stability of the absorbed muddy water concentration, which is conducive to maintaining the high sludge concentration required for uniform flocculation.

Description

Technical Field

[0001] The invention belongs to the field of sewage treatment, and in particular relates to a circulating sewage treatment pool. Background Art

[0002] The sewage treatment tank is a compact and efficient water treatment process, in which a mixer is installed in the mixing tank to quickly disperse the added coagulant. The pre-coagulated raw water flows into the flocculation reaction tank, and after adding the coagulant aid, larger flocs are obtained, which are then precipitated in the sedimentation area.

[0003] A circulating sewage treatment tank uses sludge recirculation to accelerate the growth of alum flocs and increase their density, thereby maintaining the high sludge concentration required for uniform flocculation. However, due to the instability of the sludge level and the suction effect of the sludge layer near the sludge suction port of the return pump, the concentration of the return sludge is very uneven. Summary of the Invention

[0004] The purpose of the present invention is to provide a circulating sewage treatment pool that can absorb muddy water above the sludge layer for circulation in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A circulating sewage treatment tank includes a tank body, wherein the tank body is provided with a pretreatment tank, a reaction tank, a sedimentation tank, and a clear water tank. A reflux pump is provided in the sedimentation tank for pumping muddy water back to the connection point between the pretreatment tank and the reaction tank.

[0007] A support assembly comprising a pipe body, the bottom of which is in external communication with the bottom of the sedimentation tank;

[0008] A lifting assembly includes a hose and a housing slidably disposed outside the hose, wherein one end of the hose is connected to the housing and the other end is connected to a reflux pump, a downwardly opening sliding cavity is provided in the housing, a weight is slidably disposed in the sliding cavity, and a one-way pipe for water suction is further provided at the bottom of the sliding cavity;

[0009] The traction device is used for intermittently traction falling objects and lifting them at equal distances, so as to lift the shell when the bottom of the sliding cavity is blocked by mud.

[0010] As a further preferred scheme, a first stirring component and a first dosing component are provided in the pretreatment tank, and a guide tube is provided in the reaction tank. The guide tube is opened at the top and bottom, and a second stirring component extending into the guide tube and a second dosing component for adding medicine to the opening below the guide tube are provided in the reaction tank. The connection between the pretreatment tank and the reaction tank is provided with an extension pipe extending into the opening below the guide tube. This scheme is the existing technology of the pretreatment tank and the reaction tank. Its principle is: a first stirring component is provided in the pretreatment tank, so that the coagulant added by the first dosing component is quickly dispersed and fully mixed with the raw water in the tank to form fine flocs. The coagulant is generally polyaluminum or iron salt, and its main function is to destabilize suspended particles. The raw water that has been pre-coagulated flows to the bottom of the circular guide tube in the reaction tank. The raw water, return sludge and coagulant are mixed evenly from bottom to top by the stirring paddle in the guide tube to obtain larger flocs, which are then precipitated in the sedimentation tank.

[0011] As a further preferred solution, a filter is provided between the sedimentation tank and the clear water tank, and a sewage pump is provided at the bottom of the sedimentation tank to eliminate excess flocs through the filter, and the sewage pump is used to pump out sludge.

[0012] As a further preferred embodiment, a sludge chamber is further provided in the shell, and a suction hole connected to the sludge chamber is provided on the side surface of the shell. After the hose is connected to the sludge chamber, it enters the tube body from the top of the tube body, and then passes through the bottom of the tube body to connect with the reflux pump. By arranging the sludge suction hole on the shell, it can be ensured that the sucked muddy water is above the sludge layer, so that the concentration of the returned sludge is relatively stable.

[0013] As a further preferred embodiment, the lifting assembly also includes a pull rope, one end of which passes through the sliding cavity from the top of the shell and is connected to the falling object, and the other end enters the tube body from the top of the tube body and is fixed to the inner wall of the tube body. The pull rope is set to intermittently lift the falling object, and the lifting amplitude is the same each time. When the falling object falls, if the shell falls on the sludge, the sliding cavity is blocked. Due to the poor fluidity of the sludge, the mud and water below flow out slowly when the falling object falls, resulting in the next time the rope is pulled, the lifting amplitude of the falling object can cause the shell to rise slightly, so that the shell is always located above the sludge layer and floats slightly.

[0014] As a further preferred solution, a guide wheel is provided on the top of the tube body, and an annular groove is provided on the circumferential surface of the guide wheel. The pull rope cooperates with the annular groove to facilitate the pull rope to change direction.

[0015] As a further preferred solution, the traction device is arranged in the tube body, and is used to periodically clamp the pull rope, pull it down and release it.

[0016] As a further preferred embodiment, the traction device includes a fixed plate arranged on the inner wall of the tube body, a slide cylinder vertically slidably connected to the fixed plate, the slide cylinder has a transverse opening, and a clamping part is arranged inside the slide cylinder for telescopic movement, wherein a spring for pushing the clamping part out is arranged inside the slide cylinder, a quadrilateral guide groove is arranged on the surface of the fixed plate, and a side rod is arranged on the side of the clamping part, and the side rod cooperates with the guide groove to make the clamping part telescopic when the slide cylinder is raised and lowered, and a hinged plate for the unidirectional passage of the side rod is also provided at the bottom of the guide groove. This scheme causes the clamping part to move up and down by lifting the slide cylinder, and telescopically expands and contracts by cooperating with the side rod and the guide groove during movement. The movement cycle of the clamping part is: extension-descend-retraction-upward movement, and the corresponding movement cycle of the pull rope is: compression-pulldown-release-freedom.

[0017] As a further preferred solution, a slider cooperating with the clamping part is further provided inside the tube body, a fixing rod is provided on the inner wall of the tube body, the slider is slidably connected along the fixing rod, and an elastic part is also sleeved on the fixing rod to make the slider be in the highest position, and a limiting ring is also provided on the inner wall of the tube body for limiting the pull rope. By providing a slider to help the clamping part clamp the pull rope, it is convenient to pull the pull rope down.

[0018] As a further preferred solution, the side surface of the slide is provided with a guide bar, the side wall of the fixed plate is provided with a guide groove corresponding to the guide bar, and a gear is further provided inside the tube body, wherein the gear is driven by the secondary teeth of the reflux pump, and an eccentric shaft is provided on the surface of the gear, and a connecting rod is provided between the eccentric shaft and the slide to drive the slide to rise and fall. This solution proposes a specific structure for driving the slide to slide up and down, which is driven by the reflux pump and can also be driven by a separate motor.

[0019] The present invention has at least the following beneficial effects:

[0020] The present invention provides a shell and an intermittently lifted dropper so that the shell can find the position of the sludge layer, so that the shell can rise and fall along with the position of the sludge layer, and suck muddy water near the top of the sludge layer, which can ensure the stability of the sucked muddy water concentration to a certain extent, and is conducive to maintaining the high sludge concentration required for uniform flocculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic cross-sectional structural diagram of the present invention.

[0023] Figure 3 It is a schematic diagram of the lifting assembly and the supporting mechanism of the present invention.

[0024] Figure 4 The present invention Figure 3 Left axonometric view.

[0025] Figure 5 The present invention Figure 3 Right axonometric view.

[0026] Figure 6 The present invention Figure 3 sectional view of .

[0027] Figure 7 The present invention Figure 6 A magnified view of the structure of part A.

[0028] Figure 8 The present invention Figure 7 Middle BB view.

[0029] Figure 9 It is a bottom view of the lifting assembly of the present invention.

[0030] In the figure: 1, tank body; 11, pretreatment tank; 111, first stirring assembly; 112, first dosing assembly; 12, reaction tank; 121, guide tube; 122, second stirring assembly; 123, second dosing assembly; 124, extension pipe; 13, sedimentation tank; 131, filter element; 132, sewage pump; 133, return pump; 134, return pipe; 135, gear; 136, connecting rod; 14, clear water tank; 2, support assembly; 21, pipe body; 22, guide tube Wheel; 23. Fixed rod; 24. Slider; 25. Elastic member; 26. Limiting ring; 3. Lifting assembly; 31. Shell; 32. Sludge chamber; 33. Suction hole; 34. Hose; 35. Sliding chamber; 36. One-way tube; 37. Through groove; 38. Falling object; 39. Pull rope; 4. Traction device; 41. Fixed plate; 42. Guide groove; 43. Slide; 44. Guide strip; 45. Pressing part; 46. Spring; 47. Side rod; 48. Guide groove; 481. Hinge plate. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings. It should be noted that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0032] Example 1

[0033] like Figure 1-9 As shown, a circulating sewage treatment tank includes a tank body 1, which is provided with a pretreatment tank 11, a reaction tank 12, a sedimentation tank 13, and a clear water tank 14. A reflux pump 133 is provided in the sedimentation tank 13 to pump muddy water back to the connection between the pretreatment tank 11 and the reaction tank 12.

[0034] The support assembly 2 includes a pipe body 21, the bottom of which is in external communication with the bottom of the sedimentation tank 13;

[0035] The lifting assembly 3 includes a hose 34 and a housing 31 slidably disposed outside the tube body 21. One end of the hose 34 is connected to the housing 31 and the other end is connected to the reflux pump 133. A downwardly opening sliding cavity 35 is provided within the housing 31. A weight 38 is slidably disposed within the sliding cavity 35. A one-way pipe 36 for water suction is also provided at the bottom of the sliding cavity 35.

[0036] The traction device 4 is used for intermittently traction and equidistant lifting of the falling object 38 so as to lift the housing 31 when the bottom of the sliding cavity 35 is blocked by mud.

[0037] The pretreatment tank 11 is provided with a first stirring component 111 and a first dosing component 112, and the reaction tank 12 is provided with a guide tube 121, which has upper and lower openings. The reaction tank 12 is provided with a second stirring component 122 extending into the guide tube 121 and a second dosing component 123 for adding medicine to the opening below the guide tube 121. The connection between the pretreatment tank 11 and the reaction tank 12 is provided with an extension pipe 124 extending into the opening below the guide tube 121. The treatment principle Yes: a first stirring component 111 is set in the pretreatment tank, so that the coagulant added by the first dosing component 112 can be quickly dispersed and fully mixed with the raw water in the tank to form fine flocs. The coagulant is generally polyaluminum or iron salt, and its main function is to destabilize suspended particles. The raw water after pre-coagulation flows to the bottom of the circular guide tube in the reaction tank 12. The raw water, return sludge and coagulant aid are mixed evenly from bottom to top by the stirring paddle in the guide tube to obtain larger flocs, which are then precipitated in the sedimentation tank 13.

[0038] In addition, a filter element 131 is provided between the sedimentation tank 13 and the clear water tank 14 , and a sewage pump 132 is provided at the bottom of the sedimentation tank 13 . The filter element 131 is used to eliminate excess flocs, and the sewage pump 132 is used to pump out sludge.

[0039] A sludge chamber 32 is also provided in the shell 31. A suction hole 33 connected to the sludge chamber 32 is provided on the side surface of the shell 31. After the hose 34 is connected to the sludge chamber 32, it enters the tube body 21 from above the tube body 21, and then passes through the bottom of the tube body 21 to connect with the reflux pump 133. By setting the sludge suction hole 33 on the shell 31, it can be ensured that the sucked muddy water is above the sludge layer, so that the concentration of the returned sludge is relatively stable.

[0040] The lifting assembly 3 also includes a pull rope 39, one end of the pull rope 39 passes through the sliding cavity 35 from the top of the shell 31 and is connected to the pendant 38, and the other end enters the tube body 21 from the top and is fixed to the inner wall of the tube body 21. By setting the pull rope 39 to intermittently pull the pendant, and the amplitude of each pulling is the same, when the pendant 38 falls, if the shell 31 falls on the sludge, the bottom opening of the sliding cavity 35 is blocked by the sludge. Due to the poor fluidity of the sludge, the mud and water below the sliding cavity 35 flow out slowly when the pendant 38 falls, resulting in a slow falling speed of the pendant 38. The next time the pull rope 39 is pulled, the lifting amplitude of the small amount of pendant 38 that has fallen is fixed, so the lifting amplitude of the pendant 38 can make the shell 31 rise slightly, so that the shell 31 is always located above the sludge layer and floats slightly.

[0041] A guide wheel 22 is provided on the top of the tube body 21 , and an annular groove is provided on the circumferential surface of the guide wheel 22 . The pull rope 39 cooperates with the annular groove to facilitate the pull rope 39 to change direction.

[0042] The traction device 4 is disposed in the tubular body 21 and is used to periodically clamp the pull rope 39 , pull it down, and release it.

[0043] The traction device 4 includes a fixed plate 41 arranged on the inner wall of the tube body 21 and a slide 43 vertically slidably connected to the fixed plate 41. The slide 43 has a transverse opening, and a pressing portion 45 is arranged inside it for extension and contraction. A spring 46 for pushing the pressing portion 45 out is arranged in the slide 43, and a quadrilateral guide groove 48 is provided on the surface of the fixed plate 41. The side of the pressing portion 45 is provided with a side rod 47, which cooperates with the guide groove 48 to make the pressing portion 45 extend and retract when the slide 43 is raised and lowered. A hinged plate 481 for the unidirectional passage of the side rod 47 is also provided at the bottom of the guide groove 48. In this scheme, the pressing portion 45 moves up and down by raising and lowering the slide 43, and is extended and retracted by cooperating with the side rod 47 and the guide groove 48 during movement. The movement cycle of the pressing portion 45 is: extension-descend-retraction-upward, and the corresponding movement cycle of the pull rope 39 is: compression-pull-down-release-free.

[0044] The interior of the tube body 21 is also provided with a slider 24 that cooperates with the clamping part 45. A fixing rod 23 is provided on the inner wall of the tube body 21. The slider 24 is slidably connected along the fixing rod 23, and an elastic member 25 is also sleeved on the fixing rod 23 to make the slider 24 in the highest position. A limiting ring 26 is also provided on the inner wall of the tube body 21 for limiting the pull rope 39. By providing the slider 24, the clamping part 45 is helped to clamp the pull rope 39, making it convenient to pull the pull rope 39 down.

[0045] A guide bar 44 is provided on the side surface of the slide 43, and a guide groove 42 corresponding to the guide bar 44 is provided on the side wall of the fixed plate 41. A gear 135 is also provided inside the tube body 21, wherein the gear 135 is driven by the secondary teeth of the reflux pump 133, and an eccentric shaft is provided on the surface of the gear 135, and a connecting rod 136 is provided between the eccentric shaft and the slide 43 to drive the slide 43 to rise and fall. This scheme proposes a specific structure for driving the slide 43 to slide up and down, which is driven by the reflux pump 133, and the reflux pump 133 is provided with secondary teeth, and drives the gear 135 to rotate after passing through the reducer, and the gear 135 drives the connecting rod 136 to move through the eccentric shaft, and the connecting rod 136 drives the slide 43 to rise and fall, and a motor can also be set separately for driving.

[0046] The specific implementation method is as follows: when the sewage treatment tank is in operation, muddy water is sucked in by the return pump 133 , and the muddy water returns to the inlet of the extension pipe 124 through the suction hole 33 , the sludge chamber 32 , the hose 34 , and the return pipe 134 .

[0047] Height control of the housing 31: Since the pull rope 39 is pulled intermittently and with the same amplitude, in the pulling gap, Figure 6 As shown, the falling object 38 descends along the sliding cavity 35. The sliding cavity 35 has openings at the top and bottom. Therefore, the falling object 38 is only subject to the resistance of the water flow. The pulling interval time of the pull rope 39 is controlled so that the falling speed of the falling object 38 is greater than the pulling speed. Then, the falling object 38 gradually descends in the up and down reciprocating motion. The shell 31 also descends without the pulling power. When the shell 31 falls above the sludge layer, the lower opening of the sliding cavity 35 is blocked. Only the one-way pipe 36 is connected to the upper opening of the sliding cavity 35. When the falling object 38 is lifted, the one-way pipe 36 below the sliding cavity 35 is connected to the upper opening of the sliding cavity 35. Water is sucked in, and when the falling object 38 descends, the sliding chamber 35 is blocked by sludge, the outflow speed is slow, which hinders the falling object 38 from descending, so that the falling object 38 can drive the shell 31 upward when it is pulled by the pull rope 39 next time. After the shell 31 rises, the bottom opening of the sliding chamber 35 is reopened, and the shell 31 falls again. In this reciprocating manner, the shell 31 always rises and falls above the sludge layer, and will not sink into the sludge layer, nor will it move away from the sludge layer. In addition, the up and down rise and fall of the shell 31 causes the local sludge to fluctuate, which is conducive to being sucked in by the suction port 33.

[0048] Specifically, the pull rope 39 is driven by the traction device 4, as shown in FIG. Figure 7-8 As shown, the guide groove 48 is a parallelogram. Figure 7In the position shown, the clamping portion 45 is in a clamping state. When the slide 43 descends, the clamping portion 45 compresses the pull rope 39 and descends. When the side rod 47 enters the bottom slope of the guide groove 48, the clamping portion 45 retracts and the side rod 47 passes over the hinged plate 481. When the slide 43 moves up, the side rod 47 rises along the left side of the guide groove 48. At this time, the clamping portion 45 is in a retracted state. When the slide 43 moves up to the highest point of the guide groove 48, the clamping portion 45 is pushed out by the spring 46 and re-clamps the pull rope 39. During this period, the slider 24 moves downward with the clamping portion 45 after being clamped by the clamping portion 45. When the clamping portion 45 is released, the slider 24 is reset by the elastic member 25. The hose 34 can be provided with an inner lining to prevent it from being sucked into mud and water and being flattened.

[0049] The above embodiments only express several implementation methods of the present invention, and their descriptions should not be understood as limiting the scope of the present invention. For those skilled in the art, several modifications and improvements can be made, all of which should fall within the scope of protection of the present invention.

Claims

1. A circulating sewage treatment pool, comprising a pool body (1), characterized in that: The tank body (1) is provided with a pretreatment tank (11), a reaction tank (12), a sedimentation tank (13), and a clear water tank (14). The sedimentation tank (13) is provided with a reflux pump (133) for pumping muddy water back to the connection point between the pretreatment tank (11) and the reaction tank (12). A support assembly (2) comprising a pipe body (21), the bottom of the pipe body (21) being externally connected to the bottom of the sedimentation tank (13); A lifting assembly (3) comprising a hose (34) and a housing (31) slidably disposed outside the tube body (21), wherein one end of the hose (34) is connected to the housing (31) and the other end is connected to a reflux pump (133), a sliding cavity (35) with a downward opening is provided in the housing (31), a drop (38) is slidably disposed in the sliding cavity (35), and a one-way pipe (36) for absorbing water is further provided at the bottom of the sliding cavity (35); A traction device (4) for intermittently traction-lifting the falling object (38) at equal intervals, so as to lift the housing (31) when the bottom of the sliding chamber (35) is blocked by mud; The lifting assembly (3) further includes a pull rope (39), one end of which passes through the sliding cavity (35) from above the housing (31) and is connected to the falling object (38), and the other end of which enters the tube body (21) from the top of the tube body (21) and is fixed to the inner wall of the tube body (21); The traction device (4) is arranged in the tubular body (21) and is used to periodically clamp the pull rope (39), pull it down, and release it.

2. A circulating sewage treatment pool according to claim 1, characterized in that: A first stirring assembly (111) and a first dosing assembly (112) are provided in the pretreatment tank (11); a guide tube (121) is provided in the reaction tank (12); the guide tube (121) is opened at the top and bottom; a second stirring assembly (122) extending into the guide tube (121) and a second dosing assembly (123) for dosing drugs to the opening below the guide tube (121) are provided in the reaction tank (12); an extension pipe (124) is provided at the connection point between the pretreatment tank (11) and the reaction tank (12) and extends into the opening below the guide tube (121).

3. A circulating sewage treatment pool according to claim 1, characterized in that: A filter element (131) is provided between the sedimentation tank (13) and the clear water tank (14), and a sewage pump (132) is also provided at the bottom of the sedimentation tank (13).

4. A circulating sewage treatment pool according to claim 1, characterized in that: A sludge chamber (32) is further provided in the shell (31), and a suction hole (33) communicating with the sludge chamber (32) is provided on the side surface of the shell (31). After communicating with the sludge chamber (32), the hose (34) enters the tube body (21) from above the tube body (21), and then passes through the bottom of the tube body (21) to communicate with the reflux pump (133).

5. A circulating sewage treatment pool according to claim 1, characterized in that: A guide wheel (22) is provided at the top of the tube body (21), and an annular groove is provided on the circumferential surface of the guide wheel (22), and the pull rope (39) cooperates with the annular groove.

6. A circulating sewage treatment pool according to claim 1, characterized in that: The traction device (4) includes a fixed plate (41) arranged on the inner wall of the tube body (21), a slide (43) vertically slidably connected to the fixed plate (41), the slide (43) having a transverse opening, and a pressing portion (45) is telescopically arranged inside the slide (43), wherein a spring (46) for pushing the pressing portion (45) out is arranged inside the slide (43), a quadrilateral guide groove (48) is arranged on the surface of the fixed plate (41), and a side rod (47) is arranged on the side of the pressing portion (45), the side rod (47) cooperates with the guide groove (48) to make the pressing portion (45) telescopic when the slide (43) is raised or lowered, and a hinge plate (481) for the side rod (47) to pass through in one direction is also arranged at the bottom of the guide groove (48).

7. A circulating sewage treatment pool according to claim 6, characterized in that: The interior of the tube body (21) is further provided with a slider (24) cooperating with the pressing portion (45). The inner wall of the tube body (21) is provided with a fixing rod (23). The slider (24) is slidably connected along the fixing rod (23). An elastic member (25) is also sleeved on the fixing rod (23) to enable the slider (24) to be in the highest position. A limiting ring (26) is also provided on the inner wall of the tube body (21) for limiting the pull rope (39).

8. A circulating sewage treatment pool according to claim 6, characterized in that: The side surface of the slide (43) is provided with a guide bar (44), the side wall of the fixed plate (41) is provided with a guide groove (42) corresponding to the guide bar (44), and the interior of the tube body (21) is further provided with a gear (135), wherein the gear (135) is driven by the secondary teeth of the reflux pump (133), and an eccentric shaft is provided on the surface of the gear (135), and a connecting rod (136) is provided between the eccentric shaft and the slide (43) to drive the slide (43) to rise and fall.

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