Automatic flocculant adding mechanism for sewage treatment

Abstract

The invention discloses an automatic sewage treatment flocculant adding mechanism which comprises a stirring tank fixed on a rack, a stirring paddle is arranged in the stirring tank and driven by a motor, a liquid adding tank is arranged on the periphery of the part, located outside the stirring tank, of the stirring paddle in a sleeving mode, and the liquid adding tank is arranged in the stirring tank. A first blade is fixed on the periphery of the part, positioned in the stirring tank, of the stirring paddle; the lower part of the stirring paddle is hollow to form a columnar cavity, a through hole for communicating the interior of the liquid adding tank with the columnar cavity is formed in the part, positioned in the liquid adding tank, of the stirring paddle, and the lower end of the cavity is communicated with the interior of the stirring pool. According to the sewage treatment device, automatic adding of a flocculant solution is achieved through stirring, the adding amount of the flocculant is automatically controlled through the rotating speed of stirring, the automation degree is high, the mixing uniformity degree of the flocculant solution and sewage is good, the reaction rate is high, and the sewage purification effect is improved.

Description

Technical Field

[0001] The invention relates to an automatic flocculant adding mechanism for sewage treatment, belonging to the technical field of sewage treatment equipment. Background Art

[0002] Flocculants play an important role in sewage treatment and are mainly used to accelerate the sewage purification process. Flocculants are widely used in solid-liquid separation processes in sewage treatment, including concentration, sludge dehydration and sedimentation. By adding flocculants, the electrical properties of negatively charged organic colloids in the sludge can be neutralized, causing the colloid particles to quickly condense into larger flocs, making it easier to separate from the suspension. In addition, flocculants can also be used for primary sedimentation, flotation treatment of sewage, and secondary sedimentation after the activated sludge process, and are even used in tertiary treatment or deep treatment of sewage.

[0003] The existing flocculant addition method of a sewage treatment plant is: first dissolve the flocculant in clean water, then set the flow rate of the flocculant solution according to the flow rate of the sewage, and then set a stirring device in the sewage. However, the above addition method has the following technical problems: the flocculant is prone to insufficient mixing or agglomeration, which will affect the performance of the flocculant, on the one hand leading to waste of flocculant, and on the other hand easily blocking pipes and pumps, increasing workload. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an automatic flocculant adding mechanism for sewage treatment to solve the technical problems existing in the above-mentioned prior art.

[0005] The technical solution adopted by the present invention is: an automatic flocculant adding mechanism for sewage treatment, comprising a stirring tank fixed on a frame, a stirring paddle arranged inside the stirring tank, the stirring paddle being driven by a motor, a liquid adding tank being sleeved on the outer periphery of a portion of the stirring paddle located above the stirring tank, the liquid adding tank being fixed on the frame, a flocculant solution being contained in the liquid adding tank, the stirring paddle passing through the bottom of the liquid adding tank and being rotatably sealed with the liquid adding tank, a second blade being fixed on the outer periphery of a portion of the stirring paddle located in the liquid adding tank, and a first blade being fixed on the outer periphery of a portion of the stirring paddle located in the stirring tank; the lower portion of the stirring paddle is hollow to form a columnar cavity, a through hole connecting the interior of the liquid adding tank with the columnar cavity is provided on the portion of the stirring paddle located in the liquid adding tank, and the lower end of the cavity is connected with the interior of the stirring tank.

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

[0007] Preferably, the number of the liquid adding holes is set to be more than one and they are evenly spaced and arranged at the lower end of the liquid adding pipe.

[0008] Preferably, an end of the liquid adding tube close to the stirring paddle is lower than an end of the liquid adding tube away from the stirring paddle.

[0009] Preferably, a gear is fixed on the part of the stirring paddle located above the stirring pool, the gear is meshed with a rack arranged in the horizontal direction, a scraper is fixed at each end of the rack, the scraper is used to scrape off floating objects on the liquid surface of the stirring pool, and two squeeze switches are installed above the stirring pool. When the two scrapers move to the extreme position, they can squeeze the corresponding squeeze switches respectively to make the motor turn.

[0010] Preferably, a cylinder with an axis arranged in a horizontal direction is fixed on the frame, the axis of the cylinder is parallel to the rack, a slider is connected to the inside of the cylinder in a sliding seal, a fixing rod is fixed on the slider, the fixing rod is fixed to the rack, the rack drives the fixing rod to move synchronously, a third one-way valve and a fourth one-way valve are provided on a portion of the cylinder away from the fixing 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 an air storage tank, the outlet end of the air storage tank is provided with an automatic valve, the automatic valve is connected to a vortex tube, and the hot gas outlet end of the vortex tube is connected to the inside of the stirring tank through a pipeline.

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

[0012] Preferably, a three-way pipe is provided on the hot gas outlet end of the vortex tube, 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 adding tank, and a second one-way valve is provided between the three-way pipe and the liquid adding tank, and the outlet end of the second one-way valve faces the interior of the liquid adding tank.

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

[0014] Beneficial effects of the present invention: 1. Compared with the prior art, the present invention realizes automatic addition of flocculant solution by stirring, and automatically controls the amount of flocculant added by the stirring speed, has a high degree of automation, and the flocculant solution and sewage are mixed evenly, the reaction rate is fast, and the sewage purification effect is improved.

[0015] 2. Compared with the prior art, the present invention drives the scraper to move back and forth by stirring, thereby achieving automatic scraping of floating objects.

[0016] 3. Compared with the prior art, the scraper in the present invention drives the cylinder to form an air pump by the left and right reciprocating motion. The gas discharged from the cylinder is stored in the gas tank to form compressed air. The automatic valve is opened, and the compressed air is discharged into the vortex tube for conversion. The hot gas discharged from the hot gas outlet end of the vortex tube can heat the flocculant solution and sewage respectively, thereby accelerating the reaction rate. At the same time, the hot gas can also improve the stirring effect, thereby further accelerating the reaction rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0019] The figure marks in the drawings of the specification include: a stirring tank 10, a drain valve 11, an annular cavity 12, a first one-way valve 13, a motor 14, a stirring paddle 15, a first blade 16, a liquid adding pipe 17, a liquid adding hole 18, a through hole 19, a liquid adding tank 20, a second blade 21, a sealing plate 22, a second one-way valve 23, a gear 30, a rack 31, a scraper 32, a squeeze switch 33, a cylinder 40, a third one-way valve 41, a fourth one-way valve 42, a slider 43, a fixing rod 44, an air storage tank 50, an automatic valve 51, a vortex tube 60, and a three-way valve 61. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Embodiment 1: A sewage treatment flocculant automatic adding mechanism, such as Figure 1-Figure 2As shown, it includes a stirring tank 10 fixed on a frame, the shape of the stirring tank 10 is cylindrical, a drain valve 11 is arranged at the bottom of the stirring tank 10, a stirring paddle 15 is arranged inside the stirring tank 10, the stirring paddle 15 is driven by a motor 14 fixed on the frame, the outer periphery of the portion of the stirring paddle 15 located above the stirring tank 10 is sleeved with a liquid adding tank 20, the shape of the liquid adding tank 20 is also cylindrical, the liquid adding tank 20 is fixed on the frame, there is a flocculant solution inside the liquid adding tank 20, the stirring paddle 15 passes through the bottom of the liquid adding tank 20 and is rotatably sealed and connected with the liquid adding tank 20, a second blade 21 is fixed on the outer periphery of the portion of the stirring paddle 15 located in the liquid adding tank 20, a first blade 16 is used for stirring the inside of the liquid adding tank 20, a first blade 16 is fixed on the outer periphery of the portion of the stirring paddle 15 located in the stirring tank 10, the first blade 16 is used for stirring the inside of the stirring tank 10; the first blade 16 is arranged in three layers and is evenly spaced from bottom to top.

[0022] like Figure 1 As shown, the lower part of the stirring paddle 15 is hollow to form a columnar cavity, and the portion of the stirring paddle 15 located in the liquid adding tank 20 is provided with a through hole 19 that connects the inside of the liquid adding tank 20 with the columnar cavity. The mouth of the through hole 19 is hinged with a sealing plate 22, and the upper end of the sealing plate 22 is hinged to the upper end of the mouth of the through hole 19. When the stirring paddle 15 stops rotating, the sealing plate 22 blocks the through hole 19 under its own gravity. When the stirring paddle 15 rotates, the sealing plate 22 moves to the Flip up and open; a liquid adding tube 17 is arranged on the first blade 16 along the radial direction of the stirring tank 10, the end of the liquid adding tube 17 close to the stirring paddle 15 is lower than the end of the liquid adding tube 17 away from the stirring paddle 15, the liquid adding tube 17 is connected to the columnar cavity, the lower end of the liquid adding tube 17 is connected with a liquid adding hole 18, the lower end of the liquid adding hole 18 passes through the lower end of the first blade 16, the number of the liquid adding holes 18 is set to more than one and is evenly spaced at the lower end of the liquid adding tube 17.

[0023] The motor 14 drives the stirring paddle 15 to rotate, and the sealing plate 22 flips upward and opens under the action of centrifugal force. The flocculant solution in the liquid adding tank 20 enters the liquid adding tube 17 through the through hole 19 and the columnar cavity, and then is discharged from the liquid adding hole 18 to the inside of the stirring tank 10, thereby realizing the automatic addition of the flocculant solution. The faster the speed of the stirring paddle 15, the greater the centrifugal force on the sealing plate 22, the greater the angle of the sealing plate 22, and the greater the flow rate of the flocculant solution added to the inside of the stirring tank 10, so as to realize the rapid and uniform mixing of the flocculant solution and the sewage, avoid the flocculant agglomeration, and realize the automatic matching of the flocculant addition amount and the speed of the stirring paddle 15.

[0024] A three-layer liquid adding pipe 17 is provided to achieve uniform addition of flocculant solution and rapid and uniform mixing of flocculant solution and sewage. The liquid adding pipe 17 is arranged to be inclined to facilitate the discharge of the flocculant solution. When the speed of the motor 14 is relatively low, the centrifugal force to which the flocculant solution is subjected is small and can only fill the part of the bottom liquid adding pipe 17 close to the stirring paddle 15, and is discharged from the liquid adding hole 18 close to the stirring paddle 15. When the speed of the motor 14 is relatively high, the centrifugal force to which the flocculant solution is subjected is large and fills the entire liquid adding pipe 17, and is preferentially discharged from the liquid adding hole 18 far away from the stirring paddle 15. During the reversing process of the motor 14, the motor 14 will first decelerate and then accelerate, and the centrifugal force will gradually decrease and then gradually increase, and this is repeated continuously, which is equivalent to alternately discharging the flocculant solution from the middle and periphery of the stirring tank 10, thereby enhancing the uniform mixing effect of the flocculant solution and sewage.

[0025] In this embodiment, the flocculant is located on the liquid surface of the stirring tank 10 after reacting with the sewage.

[0026] like Figure 1 As shown, a gear 30 is coaxially fixed on the part of the stirring paddle 15 located above the stirring pool 10, and the gear 30 is meshed with a rack 31 arranged in the horizontal direction, and the rack 31 is horizontally slidably connected to the frame, and a scraper 32 arranged horizontally in the front-to-back direction is fixed to the left and right ends of the rack 31, and the front and rear ends of the scraper 32 exceed the front and rear ends of the stirring pool 10, and the scraper 32 is used to scrape off the floating objects on the liquid surface of the stirring pool 10, and a squeeze switch 33 is installed above the left and right sides of the stirring pool 10, respectively. When the scraper 32 on the left side moves to the extreme position on the left side, it can squeeze the squeeze switch 33 on the left side to reverse the motor 14, and when the scraper 32 on the right side moves to the extreme position on the right side, it can squeeze the squeeze switch 33 on the right side to make the motor 14 rotate forward. Thereby, the periodic forward and reverse rotation of the motor 14 is realized, and the periodic left and right reciprocating motion of the scraper 32 is realized.

[0027] like Figure 1As shown, a cylinder 40 with an axis arranged in a horizontal direction is fixed on the frame, the axis of the cylinder 40 is parallel to the rack 31, a slider 43 is slidably and sealedly connected inside the cylinder 40, a fixing rod 44 is fixed on 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 arranged 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, 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 the gas storage tank 50, and the outlet end of the gas storage tank 50 is provided with an automatic valve 5 1, the automatic valve 51 is connected to a vortex tube 60, an annular cavity 12 is arranged on the side wall of the stirring tank 10, the hot gas outlet end of the vortex tube 60 is connected to a three-way pipe, a three-way valve 61 is arranged at the connection of the three-way pipe, one outlet of the three-way pipe is communicated with the inside of the annular cavity 12 through a pipeline, the annular cavity 12 is communicated with the inside of the stirring tank 10 through a first one-way valve 13, the outlet end of the first one-way valve 13 faces the inside of the stirring tank 10, the other outlet of the three-way pipe is communicated with the inside of the liquid adding tank 20, a second one-way valve 23 is arranged between the three-way pipe and the liquid adding tank 20, and the outlet end of the second one-way valve 23 faces the inside of the liquid adding tank 20.

[0028] The reciprocating motion of the rack 31 drives the fixed rod 44 and the slider 43 to reciprocate left and right. When the slider 43 slides to the right, negative pressure is generated inside the cylinder 40, the third one-way valve 41 is opened, the fourth one-way valve 42 is closed, and air is taken in to the cylinder 40. When the slider 43 slides to the left, positive pressure is generated inside the cylinder 40, the third one-way valve 41 is closed, the fourth one-way valve 42 is opened, and the cylinder 40 is exhausted. During the reciprocating motion of the slider 43, the cylinder 40 intermittently inhales and exhausts air to form an air pump. The gas discharged from the cylinder 40 is stored in the air storage tank 50 to form compressed air. The automatic valve 51 is opened, and the compressed air is discharged to the vortex tube 60 for conversion. The hot air discharged from the hot air outlet end of the vortex tube 60 can heat the flocculant solution and the sewage respectively, thereby accelerating the reaction rate. At the same time, the hot air can also improve the stirring effect, thereby further accelerating the reaction rate.

[0029] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A sewage treatment flocculant automatic adding mechanism, characterized by: The invention comprises a stirring pool fixed on a frame, wherein a stirring paddle is arranged inside the stirring pool, the stirring paddle is driven by a motor, a liquid adding tank is sleeved on the outer periphery of the portion of the stirring paddle located above the stirring pool, the liquid adding tank is fixed on the frame, a flocculant solution is arranged inside the liquid adding tank, the stirring paddle passes through the bottom of the liquid adding tank and is rotatably sealed with the liquid adding tank, a second blade is fixed on the outer periphery of the portion of the stirring paddle located in the liquid adding tank, and a first blade is fixed on the outer periphery of the portion of the stirring paddle located in the stirring pool; the lower part of the stirring paddle is hollow to form a columnar cavity, a through hole is arranged on the portion of the stirring paddle located in the liquid adding tank to connect the inside of the liquid adding tank with the columnar cavity, and the lower end of the cavity is connected with the inside of the stirring pool.

2. The automatic flocculant adding mechanism for sewage treatment according to claim 1, characterized in that: A liquid adding pipe is arranged on the first blade along the radial direction of the stirring tank, the liquid adding pipe is communicated with the columnar cavity, the lower end of the liquid adding pipe is connected with a liquid adding hole, and the lower end of the liquid adding hole passes through the lower end of the first blade.

3. The automatic flocculant adding mechanism for sewage treatment according to claim 2 is characterized by: The number of the liquid adding holes is set to be more than one and the holes are evenly arranged at the lower end of the liquid adding pipe.

4. The automatic flocculant adding mechanism for sewage treatment according to claim 3 is characterized by: An end of the liquid adding pipe close to the stirring paddle is lower than an end of the liquid adding pipe far away from the stirring paddle.

5. The automatic flocculant adding mechanism for sewage treatment according to claim 1 is characterized by: A gear is fixed on the part of the stirring paddle located above the stirring pool, and the gear is meshed with a rack arranged in the horizontal direction. A scraper is fixed at each end of the rack, and the scraper is used to scrape off floating objects on the liquid surface of the stirring pool. Two squeeze switches are installed above the stirring pool. When the two scrapers move to the extreme position, they can squeeze the corresponding squeeze switches respectively to make the motor turn.

6. The automatic flocculant adding mechanism for sewage treatment according to claim 5, characterized in that: A cylinder with an axis arranged in the horizontal direction is fixed on the frame, the axis of the cylinder is parallel to the rack, a slider is connected to the inside of the cylinder in a sliding seal, a fixing rod is fixed on the slider, the fixing rod is fixed to the rack, the rack drives the fixing rod to move synchronously, a third one-way valve and a fourth one-way valve are arranged on the part of the cylinder away from the fixing 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 an air storage tank, the outlet end of the air storage tank is provided with an automatic valve, the automatic valve is connected to a vortex tube, and the hot gas outlet end of the vortex tube is connected to the inside of the stirring tank through a pipeline.

7. The automatic flocculant adding mechanism for sewage treatment according to claim 6, characterized in that: An annular cavity is provided on the side wall of the stirring pool, the hot gas outlet end of the vortex tube is connected with the interior of the annular cavity through a pipeline, the annular cavity and the interior of the stirring pool are connected through a first one-way valve, and the outlet end of the first one-way valve faces the interior of the stirring pool.

8. The automatic flocculant adding mechanism for sewage treatment according to claim 7, characterized in that: A three-way pipe is arranged on the hot gas outlet end of the vortex tube, a three-way valve is arranged 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 adding tank, a second one-way valve is arranged between the three-way pipe and the liquid adding tank, and the outlet end of the second one-way valve faces the interior of the liquid adding tank.

9. The automatic flocculant adding mechanism for sewage treatment according to claim 8, characterized in that: A sealing plate is hinged at the mouth of the through hole, and the upper end of the sealing plate is hinged at the upper end of the mouth of the through hole. When the stirring paddle stops rotating, the sealing plate seals the through hole under its own gravity. When the stirring paddle rotates, the sealing plate flips upward and opens under the action of centrifugal force.

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