Circulating sewage treatment tank

Abstract

The invention relates to a circulating type sewage treatment tank which comprises a tank body, a pretreatment tank, a reaction tank, a sedimentation tank and a clean water tank are arranged in the tank body, a reflux pump is arranged in the sedimentation tank and used for pumping muddy water back to the communication position of the pretreatment tank and the reaction tank, a supporting assembly, a lifting assembly and a traction device are arranged in the sedimentation tank, and the lifting assembly is used for lifting the muddy water. Wherein the traction device is used for intermittently dragging the falling object to lift equidistantly. By arranging the shell and the intermittently lifted falling object, the shell can find the position of the sludge layer, so that the shell can be lifted along with the position of the sludge layer, muddy water is sucked near the position above the sludge layer, the concentration of the sucked muddy water can be ensured to be stable to a certain extent, and the high sludge concentration required by uniform flocculation is favorably maintained.

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 stirrer 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 is one that accelerates the growth of alum flocs and increases the density of alum flocs by sludge return to maintain the high sludge concentration required for uniform flocculation. However, due to the instability of the mud level and the suction effect of the mud layer near the mud 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 which 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 comprises a tank body, wherein a pretreatment tank, a reaction tank, a sedimentation tank and a clean water tank are arranged in the tank body, wherein a reflux pump is arranged in the sedimentation tank for pumping muddy water back to the connection point between the pretreatment tank and the reaction tank, wherein a

[0007] A support assembly, comprising a pipe body, the bottom of which is externally connected to the bottom of the sedimentation tank;

[0008] A lifting assembly, comprising a hose and a shell slidably arranged outside the hose, wherein one end of the hose is connected to the shell and the other end is connected to a reflux pump, a sliding cavity with an opening facing downward is arranged in the shell, a falling object is slidably arranged in the sliding cavity, and a one-way pipe for absorbing water is also arranged 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 the bottom, and a second stirring component extending into the guide tube and a second dosing component for adding drugs to the opening below the guide tube are provided in the reaction tank. An extension pipe is provided at the connection between the pretreatment tank and the reaction tank to extend into the opening below the guide tube. This scheme is the existing technology of the pretreatment tank and the reaction tank, and its principle is: a first stirring component is provided in the pretreatment tank, so that the coagulant added by the first dosing component 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, and 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 clean water tank, and a sewage pump is also 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 be connected to 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 as to make the concentration of the returned sludge more 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 can sink or float slightly.

[0014] As a further preferred solution, a guide wheel is arranged on the top of the tube body, and an annular groove is arranged 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 having a transverse opening, and a clamping part is telescopically arranged inside the slide cylinder, 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 arranged at the bottom of the guide groove. In this scheme, the clamping part moves up and down by lifting the slide cylinder, and telescopes and retracts when moving through the cooperation of the side rod and the guide groove. The movement cycle of the clamping part is: extension-descent-retraction-upward movement, and the corresponding movement cycle of the pull rope is: compression-pull-down-release-freedom.

[0017] As a further preferred embodiment, 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 the slider to help the clamping part clamp the pull rope, it is convenient to pull the pull rope down.

[0018] As a further preferred scheme, the side surface of the slide cylinder is provided with a guide strip, the side wall of the fixed plate is provided with a guide groove corresponding to the guide strip, 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 cylinder to drive the slide cylinder to rise and fall. This scheme proposes a specific structure for driving the slide cylinder 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 drop so that the shell can find the position of the sludge layer, and 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 diagram of the cross-sectional structure 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] Fig. 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 tube; 13, sedimentation tank; 131, filter element; 132, sewage pump; 133, reflux pump; 134, reflux 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, limit ring; 3, lifting assembly; 31, shell; 32, sludge chamber; 33, suction hole; 34, hose; 35, sliding chamber; 36, one-way pipe; 37, through groove; 38, falling object; 39, pull rope; 4, traction device; 41, fixed plate; 42, guide groove; 43, slide cylinder; 44, guide strip; 45, clamping part; 46, spring; 47, side rod; 48, guide groove; 481, hinged 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, in which a pretreatment tank 11, a reaction tank 12, a sedimentation tank 13, and a clean water tank 14 are arranged. A reflux pump 133 is arranged 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 externally connected to the bottom of the sedimentation tank 13;

[0035] The lifting assembly 3 includes a hose 34 and a shell 31 slidably disposed outside the tube body 21, wherein one end of the hose 34 is connected to the shell 31 and the other end is connected to the reflux pump 133, a sliding cavity 35 with an opening facing downward is disposed in the shell 31, a pendant 38 is slidably disposed in the sliding cavity 35, and a one-way pipe 36 for absorbing water is also disposed 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 assembly 111 and a first dosing assembly 112, the reaction tank 12 is provided with a guide tube 121, the guide tube 121 has upper and lower openings, and the reaction tank 12 is provided with 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, and an extension pipe 124 is provided at the connection between the pretreatment tank 11 and the reaction tank 12 to extend into the opening below the guide tube 121. Yes: a first stirring component 111 is arranged 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, and 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 13.

[0038] In addition, a filter element 131 is provided between the sedimentation tank 13 and the clean 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, and 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 be connected with the reflux pump 133. By arranging the sludge suction hole 33 on the shell 31, it can be ensured that the sucked muddy water is above the sludge layer, so as to make the concentration of the returned sludge more 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 of the tube body 21 and is fixed to the inner wall of the tube body 21. The pull rope 39 is set to intermittently lift the pendant, and the amplitude of each lifting 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 under 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. Therefore, 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 for periodically clamping the pull rope 39, pulling it down, and releasing it.

[0043] 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 has a transverse opening, and a clamping portion 45 is telescopically arranged inside the slide, wherein a spring 46 for pushing the clamping portion 45 out is arranged in 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 clamping portion 45, and the side rod 47 cooperates with the guide groove 48 to make the clamping portion 45 telescopic when the slide 43 is raised and lowered, and a hinged plate 481 for the unidirectional passage of the side rod 47 is also arranged at the bottom of the guide groove 48. In this scheme, the clamping portion 45 moves up and down by lifting the slide 43, and telescopes and retracts when moving through the cooperation of the side rod 47 and the guide groove 48. The movement cycle of the clamping portion 45 is: extension-descent-retraction-upward movement, and the corresponding movement cycle of the pull rope 39 is: compression-pull-down-release-freedom.

[0044] A slider 24 cooperating with the clamping portion 45 is also provided inside the tube body 21, 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, and a limiting ring 26 is also provided on the inner wall of the tube body 21 for limiting the pull rope 39. The slider 24 is provided to help the clamping portion 45 clamp the pull rope 39, so that the pull rope 39 can be pulled down conveniently.

[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 meshing of the auxiliary 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 auxiliary 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 reflux pump 133 , and the muddy water returns to the inlet of the extension pipe 124 through the suction hole 33 , the mud chamber 32 , the hose 34 , and the reflux 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 lifting and lowering of 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, and the shell 31 also descends without the pulling power. When the shell 31 falls on the sludge layer, the lower opening of the sliding cavity 35 is blocked, and only the one-way pipe 36 is connected to the upper opening of the sliding cavity 35. Then, 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, and the outflow speed is slow, which hinders the falling object 38 from descending, so that the falling object 38 can drive the shell 31 to move 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, and the shell 31 always rises and falls above the sludge layer, and will not sink into the sludge layer, nor will it be far away from the sludge layer. The up and down rise and fall of the shell 31 causes the local sludge to rise and fall, 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, such as 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 clamps 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 to re-clamp the pull rope 39. During this period, the slider 24 is clamped by the clamping portion 45 and moves downward with 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-mentioned embodiments only express several implementation methods of the present invention, and the description thereof shall not be construed as limiting the scope of the present invention. For those skilled in the art, several modifications and improvements may be made, which shall all fall within the protection scope of the present invention.

Claims

1. A circulating sewage treatment tank, comprising a tank 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 clean 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 a sedimentation tank (13); A lifting assembly (3) comprises a hose (34) and a shell (31) slidably arranged outside a tube body (21), wherein one end of the hose (34) is connected to the shell (31) and the other end is connected to a reflux pump (133), a sliding cavity (35) with an opening facing downward is arranged in the shell (31), a falling object (38) is slidably arranged in the sliding cavity (35), and a one-way pipe (36) for absorbing water is also arranged at the bottom of the sliding cavity (35); 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 chamber (35) is blocked by mud.

2. A circulating sewage treatment pool according to claim 1, characterized in that: The pretreatment tank (11) is provided with a first stirring component (111) and a first dosing component (112), the reaction tank (12) is provided with a guide tube (121), the guide tube (121) is opened at the top and the bottom, and 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 drugs to the opening below the guide tube (121), and an extension pipe (124) is provided at the connection point between the pretreatment tank (11) and the reaction tank (12) to extend 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 clean 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 also provided in the shell (31), and 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 communicate with the reflux pump (133).

5. A circulating sewage treatment pool according to claim 1, characterized in that: The lifting assembly (3) further comprises a pull rope (39), one end of which passes through the sliding cavity (35) from above the shell (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).

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

7. A circulating sewage treatment pool according to claim 5, characterized in that: The traction device (4) is arranged in the tubular body (21) and is used for periodically clamping the pull rope (39), pulling it down and releasing it.

8. A circulating sewage treatment pool according to claim 7, characterized in that: The traction device (4) comprises a fixed plate (41) arranged on the inner wall of the tube body (21), and a slide tube (43) vertically slidably connected to the fixed plate (41), wherein the slide tube (43) has a transverse opening and a clamping portion (45) is telescopically arranged inside the slide tube (43), wherein a spring (46) for pushing out the clamping portion (45) is arranged inside the slide tube (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 clamping portion (45), wherein the side rod (47) cooperates with the guide groove (48) to make the clamping portion (45) telescopic when the slide tube (43) is raised or lowered, and a hinge plate (481) for the unidirectional passage of the side rod (47) is also arranged at the bottom of the guide groove (48).

9. A circulating sewage treatment pool according to claim 8, characterized in that: A slider (24) cooperating with the pressing portion (45) is also provided inside the tube body (21), 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) so that the slider (24) is in the highest position, and a limiting ring (26) is also provided on the inner wall of the tube body (21) for limiting the pull rope (39).

10. A circulating sewage treatment pool according to claim 8, 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 also 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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