Automatic adding mechanism of sewage treatment flocculant

Abstract

The application discloses a kind of sewage treatment flocculants automatic adding mechanism, including the stirring pool of being fixed on rack, the inside of the stirring pool is provided with stirring paddle, the stirring paddle is driven by motor, the outer periphery of the part of the stirring paddle located outside the stirring pool is equipped with liquid addition groove, and the outer periphery of the part of the stirring paddle located inside the stirring pool is fixed with first blade;The lower part of the stirring paddle is hollow to form columnar cavity, the part of the stirring paddle located in the liquid addition groove is provided with through hole, which communicates the inside of the liquid addition groove with the columnar cavity, and the lower end of the cavity is communicated with the inside of the stirring pool.In the application, automatic addition of flocculant solution is realized by stirring, and the amount of flocculant addition is automatically controlled by the speed of stirring, so that the degree of automation is high, the flocculant solution and sewage are mixed evenly, the reaction rate is fast, and the purification effect of sewage is improved.

Description

Technical Field

[0001] This invention relates to an automatic flocculant addition mechanism for wastewater treatment, belonging to the technical field of wastewater treatment equipment. Background Technology

[0002] Flocculants play a crucial role in wastewater treatment, primarily accelerating the purification process. They are widely used in solid-liquid separation processes, including thickening, sludge dewatering, and sedimentation. By adding flocculants, the negative charge of organic colloids in sludge is neutralized, causing colloidal particles to rapidly aggregate into larger flocs, making them easier to separate from the suspension. Furthermore, flocculants can be used for primary sedimentation, flotation treatment, and secondary sedimentation after activated sludge processes, and even in tertiary or advanced wastewater treatment.

[0003] The existing method of adding flocculants in a wastewater treatment plant is as follows: first, the flocculant is dissolved in clean water, then the flow rate of the flocculant solution is set according to the flow rate of the wastewater, and then a stirring device is installed in the wastewater. However, the above method of addition has the following technical problems: the flocculant is prone to insufficient mixing or clumping, which will affect the performance of the flocculant. On the one hand, it leads to the waste of flocculant, and on the other hand, it is easy to block the pipes and pumps, increasing the workload. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic flocculant addition mechanism for sewage treatment, so as to solve the technical problems existing in the prior art.

[0005] The technical solution adopted by this invention is as follows: an automatic flocculant addition mechanism for sewage treatment, comprising a stirring tank fixed on a frame, an agitator installed inside the stirring tank, the agitator being driven by a motor, a liquid addition tank being fitted around the outer periphery of the portion of the agitator located above the stirring tank, the liquid addition tank being fixed on the frame, a flocculant solution being inside the liquid addition tank, the agitator penetrating the bottom of the liquid addition tank and being rotatably and sealingly connected to the liquid addition tank, a second blade being fixed around the outer periphery of the portion of the agitator located inside the liquid addition tank, and a first blade being fixed around the outer periphery of the portion of the agitator located inside the stirring tank; the lower part of the agitator is hollow to form a columnar cavity, and a through hole is provided on the portion of the agitator located inside the liquid addition tank to communicate with the interior of the liquid addition tank and the columnar cavity, the lower end of the cavity communicating with the interior of the stirring tank.

[0006] Preferably, a liquid addition pipe is provided on the first blade along the radial direction of the stirring tank. The liquid addition pipe communicates with the columnar cavity, and a liquid addition hole is connected to the lower end of the liquid addition pipe. The lower end of the liquid addition hole passes through the lower end of the first blade.

[0007] Preferably, the number of liquid filling holes is set to one or more and they are evenly spaced at the lower end of the liquid filling tube.

[0008] Preferably, the upper end of the liquid addition tube closer to the agitator is lower than the upper end of the liquid addition tube farther from the agitator.

[0009] Preferably, a gear is fixed on the portion of the stirring paddle located above the stirring tank. The gear meshes with a rack arranged in a horizontal direction. A scraper is fixed to each end of the rack. The scraper is used to scrape off floating objects on the surface of the liquid in the stirring tank. Two squeeze switches are installed above the stirring tank. When the two scrapers move to their limit positions, they can squeeze the corresponding squeeze switches to turn the motor.

[0010] Preferably, a cylinder with its axis arranged horizontally is fixed on the frame. The axis of the cylinder is parallel to the rack. A slider is slidably and sealed inside the cylinder. A fixed rod is fixed on the slider. The fixed rod is fixed to the rack. The rack drives the fixed rod to move synchronously. A third one-way valve and a fourth one-way valve are provided on the part of the cylinder away from the fixed rod. The outlet end of the third one-way valve faces the inside of the cylinder. The inlet end of the fourth one-way valve faces the inside of the cylinder. The outlet end of the fourth one-way valve is connected to a gas storage tank. An automatic valve is provided at the outlet end of the gas storage tank. The automatic valve is connected to a vortex tube. The hot gas outlet end of the vortex tube is connected to the inside of the mixing tank through a pipe.

[0011] Preferably, an annular cavity is provided on the side wall of the mixing tank, and the hot gas outlet end of the vortex tube is connected to the interior of the annular cavity through a pipe. The annular cavity and the interior of the mixing tank are connected by a first one-way valve, and the outlet end of the first one-way valve faces the interior of the mixing tank.

[0012] Preferably, a three-way pipe is provided at the hot gas outlet end of the vortex tube, and a three-way valve is provided at the connection of the three-way pipe. One outlet of the three-way pipe is connected to the interior of the stirring tank, and the other outlet of the three-way pipe is connected to the interior of the liquid addition tank. A second one-way valve is provided between the three-way pipe and the liquid addition tank, and the outlet end of the second one-way valve faces the interior of the liquid addition tank.

[0013] Preferably, a sealing plate is hinged to the opening of the through hole, and the upper end of the sealing plate is hinged to the upper end of the opening of the through hole. When the stirring paddle stops rotating, the sealing plate blocks the through hole under its own weight. When the stirring paddle rotates, the sealing plate flips upward and opens under the action of centrifugal force.

[0014] The beneficial effects of this invention are:

[0015] 1. Compared with the prior art, the present invention achieves automatic addition of flocculant solution by stirring, and automatically controls the amount of flocculant added by stirring speed. It has a high degree of automation, good uniformity of flocculant solution and sewage, fast reaction rate, and improves sewage purification effect.

[0016] 2. Compared with the prior art, the present invention achieves automatic scraping of floating objects by stirring to drive the scraper to move back and forth.

[0017] 3. Compared with the prior art, in this invention, the scraper moves back and forth to drive the cylinder to form an air pump. The gas discharged from the cylinder is stored in the air tank to form compressed air. When the automatic valve is opened, the compressed air is discharged to the vortex tube for conversion. The hot air discharged from the hot air outlet of the vortex tube can heat the flocculant solution and sewage respectively, thereby accelerating the reaction rate. At the same time, the hot air can also improve the stirring effect, further accelerating the reaction rate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 yes Figure 1 Enlarged view of section A.

[0020] The reference numerals in the accompanying drawings include: stirring tank 10, drain valve 11, annular cavity 12, first check valve 13, motor 14, stirring paddle 15, first blade 16, liquid filling pipe 17, liquid filling hole 18, through hole 19, liquid filling trough 20, second blade 21, sealing plate 22, second check valve 23, gear 30, rack 31, scraper 32, squeeze switch 33, cylinder 40, third check valve 41, fourth check valve 42, slider 43, fixed rod 44, gas storage tank 50, automatic valve 51, vortex tube 60, three-way valve 61. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1:

[0023] An automatic flocculant dosing mechanism for wastewater treatment, such as Figures 1-2As shown, the system includes a mixing tank 10 fixed on a frame. The mixing tank 10 is cylindrical in shape. A drain valve 11 is provided at the bottom of the mixing tank 10. An agitator 15 is provided inside the mixing tank 10. The agitator 15 is driven by a motor 14 fixed on the frame. A liquid addition tank 20 is fitted around the outer periphery of the portion of the agitator 15 located above the mixing tank 10. The liquid addition tank 20 is also cylindrical in shape and is fixed on the frame. The liquid addition tank 20 contains a flocculant solution. The agitator 15 penetrates the bottom of the liquid addition tank 20 and is rotatably and sealingly connected to the liquid addition tank 20. A second blade 21 is fixed around the outer periphery of the portion of the agitator 15 located inside the liquid addition tank 20. A first blade 16 is used to stir the inside of the liquid addition tank 20. The first blade 16 is fixed around the outer periphery of the portion of the agitator 15 located inside the mixing tank 10 and is used to stir the inside of the mixing tank 10. The first blade 16 is arranged in three layers and is evenly spaced from bottom to top.

[0024] like Figure 1 As shown, the lower part of the stirring paddle 15 is hollow, forming a cylindrical cavity. A through hole 19 is provided on the portion of the stirring paddle 15 located inside the liquid addition tank 20, connecting the interior of the liquid addition tank 20 to the cylindrical cavity. A sealing plate 22 is hinged to the opening of the through hole 19, with its upper end hinged to the upper end of the opening of the through hole 19. When the stirring paddle 15 stops rotating, the sealing plate 22 seals the through hole 19 under its own weight. When the stirring paddle 15 rotates, the sealing plate 22, under the action of centrifugal force, moves towards... The top is flipped open; a liquid addition pipe 17 is arranged radially along the mixing tank 10 on the first blade 16. The upper end of the liquid addition pipe 17 near the stirring paddle 15 is lower than the upper end of the liquid addition pipe 17 away from the stirring paddle 15. The liquid addition pipe 17 is connected to the columnar cavity. The lower end of the liquid addition pipe 17 is connected to a liquid addition hole 18. The lower end of the liquid addition hole 18 passes through the lower end of the first blade 16. The number of liquid addition holes 18 is set to more than one and they are evenly arranged at the lower end of the liquid addition pipe 17.

[0025] Motor 14 drives the agitator 15 to rotate, and the sealing plate 22 flips upward and opens under the action of centrifugal force. The flocculant solution inside the liquid addition tank 20 enters the liquid addition pipe 17 through the through hole 19 and the columnar cavity, and then is discharged into the mixing tank 10 through the liquid addition hole 18, thereby realizing the automatic addition of flocculant solution. The faster the rotation speed of the agitator 15, the greater the centrifugal force on the sealing plate 22, the larger the opening angle of the sealing plate 22, and the greater the flow rate of flocculant solution added into the mixing tank 10. This achieves rapid and uniform mixing of flocculant solution and sewage, avoids flocculant agglomeration, and realizes automatic matching between the amount of flocculant added and the rotation speed of the agitator 15.

[0026] A three-layer dosing pipe 17 is installed to achieve uniform addition of flocculant solution and rapid, uniform mixing of the flocculant solution with wastewater. The dosing pipe 17 is angled to facilitate flocculant solution discharge. When the motor 14 rotates at a lower speed, the centrifugal force on the flocculant solution is small, only filling the lower dosing pipe 17 near the agitator 15, and discharging from the dosing hole 18 near the agitator 15. When the motor 14 rotates at a higher speed, the centrifugal force on the flocculant solution is large, filling the entire dosing pipe 17, and preferentially discharging from the dosing hole 18 furthest from the agitator 15. During motor 14 reversal, the motor 14 first decelerates and then accelerates, the centrifugal force gradually decreasing and then gradually increasing, repeating this process continuously. This is equivalent to alternately discharging the flocculant solution from the middle and outer periphery of the mixing tank 10, enhancing the uniform mixing effect of the flocculant solution and wastewater.

[0027] In this embodiment, the flocculant reacts with the sewage and then sits on the surface of the liquid in the mixing tank 10.

[0028] like Figure 1 As shown, a gear 30 is coaxially fixed on the portion of the agitator 15 above the mixing tank 10. The gear 30 meshes with a rack 31 arranged horizontally. The rack 31 is horizontally slidably connected to the frame. A scraper 32 arranged horizontally in the front-back direction is fixed to each end of the rack 31. The front and back ends of the scraper 32 extend beyond the front and back ends of the mixing tank 10. The scraper 32 is used to scrape off floating objects on the surface of the liquid in the mixing tank 10. A squeeze switch 33 is installed above each of the left and right sides of the mixing tank 10. When the scraper 32 on the left moves to its left limit position, it squeezes the left squeeze switch 33, causing the motor 14 to reverse. When the scraper 32 on the right moves to its right limit position, it squeezes the right squeeze switch 33, causing the motor 14 to rotate forward. This achieves the periodic forward and reverse rotation of the motor 14, and thus the periodic left-right reciprocating motion of the scraper 32.

[0029] like Figure 1As shown, a cylinder 40 with its axis arranged horizontally is fixed on the frame. The axis of the cylinder 40 is parallel to the rack 31. A slider 43 is slidably and sealed inside the cylinder 40. A fixing rod 44 is fixed to the right end of the slider 43. The fixing rod 44 is fixed to the rack 31, and the rack 31 drives the fixing rod 44 to move synchronously. A third one-way valve 41 and a fourth one-way valve 42 are provided on the left end of the cylinder 40. The outlet end of the third one-way valve 41 faces the inside of the cylinder 40, and the inlet end of the fourth one-way valve 42 faces the inside of the cylinder 40. The outlet end of the fourth one-way valve 42 is connected to a gas storage tank 50, and an automatic valve 5 is provided at the outlet end of the gas storage tank 50. 1. An automatic valve 51 is connected to a vortex tube 60. An annular cavity 12 is provided on the side wall of the mixing tank 10. A three-way pipe is connected to the hot gas outlet end of the vortex tube 60. A three-way valve 61 is provided at the connection of the three-way pipe. One outlet of the three-way pipe is connected to the inside of the annular cavity 12 through a pipe. The annular cavity 12 is connected to the inside of the mixing tank 10 through a first one-way valve 13. The outlet end of the first one-way valve 13 faces the inside of the mixing tank 10. The other outlet of the three-way pipe is connected to the inside of the liquid addition tank 20. A second one-way valve 23 is provided between the three-way pipe and the liquid addition tank 20. The outlet end of the second one-way valve 23 faces the inside of the liquid addition tank 20.

[0030] The rack 31 reciprocates left and right, driving the fixed rod 44 and the slider 43 to reciprocate left and right. When the slider 43 slides to the right, a negative pressure is generated inside the cylinder 40, the third one-way valve 41 opens, and the fourth one-way valve 42 closes, allowing air to enter the cylinder 40. When the slider 43 slides to the left, a positive pressure is generated inside the cylinder 40, the third one-way valve 41 closes, and the fourth one-way valve 42 opens, allowing air to exit the cylinder 40. During the reciprocating motion of the slider 43, the cylinder 40 intermittently draws in and exhausts air, forming an air pump. The gas discharged from the cylinder 40 is stored in the air tank 50 to form compressed air. When the automatic valve 51 is opened, the compressed air is discharged to the vortex tube 60 for conversion. The hot air discharged from the hot air outlet of the vortex tube 60 can heat the flocculant solution and sewage respectively, accelerating the reaction rate. At the same time, the hot air can also improve the stirring effect, further accelerating the reaction rate.

[0031] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. A sewage treatment flocculant automatic adding mechanism, characterized in that: The device includes a mixing tank fixed to a frame, an agitator inside the mixing tank, the agitator being driven by a motor, a liquid addition tank fixed to the frame on the outer periphery of the portion of the agitator above the mixing tank, the liquid addition tank containing a flocculant solution, the agitator penetrating the bottom of the liquid addition tank and being rotatably and sealingly connected to the liquid addition tank, a second blade fixed to the outer periphery of the portion of the agitator inside the liquid addition tank, and a first blade fixed to the outer periphery of the portion of the agitator inside the mixing tank; the lower part of the agitator is hollow, forming a cylindrical cavity, and the portion of the agitator inside the liquid addition tank has a through hole communicating with the interior of the liquid addition tank and the cylindrical cavity, the lower end of the cavity communicating with the interior of the mixing tank; A liquid addition pipe is provided on the first blade along the radial direction of the stirring tank. The liquid addition pipe communicates with the columnar cavity. A liquid addition hole is connected to the lower end of the liquid addition pipe. The lower end of the liquid addition hole passes through the lower end of the first blade. The number of liquid filling holes is set to one or more and they are evenly spaced at the lower end of the liquid filling tube; The upper end of the liquid addition tube near the agitator is lower than the upper end of the liquid addition tube away from the agitator; A gear is fixed on the part of the stirring paddle located above the stirring tank. The gear meshes with a rack arranged in a horizontal direction. A scraper is fixed to each end of the rack. The scraper is used to scrape off floating objects on the surface of the liquid in the stirring tank. Two squeeze switches are installed above the stirring tank. When the two scrapers move to their limit positions, they can squeeze the corresponding squeeze switches to turn the motor. A cylindrical body with its axis arranged horizontally is fixed on the frame. The axis of the cylindrical body is parallel to the rack. A slider is slidably and sealed inside the cylindrical body. A fixed rod is fixed on the slider. The fixed rod is fixed to the rack. The rack drives the fixed rod to move synchronously. A third one-way valve and a fourth one-way valve are provided on the part of the cylindrical body away from the fixed rod. The outlet end of the third one-way valve faces the inside of the cylindrical body, and the inlet end of the fourth one-way valve faces the inside of the cylindrical body. The outlet end of the fourth one-way valve is connected to a gas storage tank. An automatic valve is provided at the outlet end of the gas storage tank. The automatic valve is connected to a vortex tube. The hot gas outlet end of the vortex tube is connected to the inside of the mixing tank through a pipe. An annular cavity is provided on the side wall of the mixing tank. The hot gas outlet end of the vortex tube is connected to the inside of the annular cavity through a pipe. The annular cavity and the inside of the mixing tank are connected through a first one-way valve. The outlet end of the first one-way valve faces the inside of the mixing tank. A three-way pipe is provided at the hot gas outlet end of the vortex tube, and a three-way valve is provided at the connection of the three-way pipe. One outlet of the three-way pipe is connected to the inside of the stirring tank, and the other outlet of the three-way pipe is connected to the inside of the liquid addition tank. A second one-way valve is provided between the three-way pipe and the liquid addition tank, and the outlet end of the second one-way valve faces the inside of the liquid addition tank. A sealing plate is hinged to the opening of the through hole, and the upper end of the sealing plate is hinged to the upper end of the opening of the through hole. When the stirring paddle stops rotating, the sealing plate blocks the through hole under its own weight. When the stirring paddle rotates, the sealing plate flips upward and opens under the action of centrifugal force.

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