A hydraulically agitated PAC feeder

Abstract

The application discloses a kind of hydraulic stirring PAC material dissolver, including base, the base is installed with material dissolver jar, the material dissolver jar includes jar body, the upper portion of the jar body is equipped with water pipe, the lower portion of the jar body is equipped with blowdown pipe;The upper portion of the jar body is equipped with medicine storage box, the medicine storage box includes box body, the jar body is equipped with a plurality of evenly arranged feeding pipe between box body;Material dissolver jar side is equipped with water pump, the water inlet pipe of water pump is connected with the upper portion of material dissolver jar, the water outlet pipe of water pump is connected with the bottom of material dissolver jar, the water outlet pipe side is equipped with third water outlet branch pipe, the water inlet pipe, water outlet pipe, water pipe, blowdown pipe and third water outlet branch pipe are all equipped with valve.This application makes sewage and PAC in jar body circulate and flow by water pump, forms hydraulic stirring effect, reduces floor area, reduces manufacturing cost and maintenance cost at the same time, significantly improves the dissolution efficiency and mixing uniformity of PAC, ensures the sufficient dissolution and uniform distribution of PAC in water.

Description

Technical Field

[0001] This invention belongs to the field of chemical processing equipment, and specifically relates to a hydraulically agitated PAC chemical processing device. Background Technology

[0002] In the field of water treatment, polyaluminum chloride (PAC), as a highly efficient and economical flocculant, has become the first choice for many water plants in treating wastewater due to its excellent coagulation performance and wide applicability. The dissolution and mixing effect of PAC in the water treatment process directly determines the efficiency of subsequent flocculation and sedimentation and the quality of the effluent. Therefore, how to optimize the dissolution process of PAC and improve the dissolution efficiency and mixing uniformity has become an important problem that urgently needs to be solved in the current water treatment field.

[0003] However, traditional water treatment plants using PAC as a flocculant generally rely on conventional agitation and dissolution systems combining dissolution tanks with large agitators. While this system can achieve PAC dissolution to some extent, its inherent limitations are becoming increasingly apparent. First, traditional PAC dissolution systems are complex in structure, consisting of dissolution tanks, high-power agitators, precisely metered pumping systems, control cabinets, and intricate piping and accessories. This not only occupies a large amount of valuable space resources but also leads to a significant increase in manufacturing and maintenance costs, which is undoubtedly a heavy burden for water treatment plants with limited resources or budgets.

[0004] More importantly, traditional agitators often suffer from uneven mixing and insufficient turbulence during the mixing process. This results in low dissolution efficiency of PAC in the dissolution tank, with some PAC particles failing to dissolve fully, forming sediment or stratification, thus affecting subsequent flocculation. Furthermore, the shear force generated during mixing may break up the flocculent particles, further reducing the flocculation effect. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a hydraulically agitated PAC feeder that significantly improves the dissolution efficiency and mixing uniformity of PAC while reducing the footprint, manufacturing cost and maintenance cost. This ensures that PAC is fully dissolved and evenly distributed in water, thus laying a solid foundation for the subsequent flocculation and sedimentation process and further improving the effluent quality and operating efficiency of the water plant.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A hydraulically agitated PAC (Potentially Aerated Concentrator) feeder includes a base on which a feed tank is mounted. The feed tank includes a tank body, with a water inlet pipe on one side of the upper part of the tank body through which wastewater to be treated is injected into the tank body. A drain pipe is located at the lower part of the tank body through which flocculants are discharged. A chemical storage tank is located at the upper part of the tank body, and the storage tank includes a box body. Several evenly arranged feeding pipes are provided between the tank body and the box body. A water pump is located on one side of the feed tank. The inlet pipe of the water pump is connected to the upper part of the feed tank, and the outlet pipe of the water pump is connected to the bottom of the feed tank. A third outlet branch pipe is located on one side of the outlet pipe. Valves are provided on the inlet pipe, outlet pipe, water inlet pipe, drain pipe, and third outlet branch pipe.

[0008] Furthermore, a first outlet branch pipe and a second outlet branch pipe are connected to one side of the outlet pipe. The first outlet branch pipe is connected to the bottom of the tank, and the second outlet branch pipe extends upward from the bottom of the tank to the surface of the sewage.

[0009] Furthermore, the first outlet branch pipe is tangentially connected to the front of the tank, the inlet pipe is tangentially connected to the rear of the tank, and a spiral guide plate is provided on the inner wall of the tank.

[0010] Furthermore, a nozzle is provided at the upper part of the second water outlet branch pipe, and several water spray holes are provided on the outside of the nozzle.

[0011] Furthermore, the nozzle is rotatably connected to the upper end of the second water outlet branch pipe via a rotary joint, and several baffles are fixedly connected to the outside of the nozzle, with the lower ends of the baffles extending into the sewage.

[0012] Furthermore, the tank body is provided with an insulation layer on the outside, and a heating device is provided inside the insulation layer, the heating device including an electric heating wire or a steam pipe.

[0013] Furthermore, the housing is equipped with a stirring shaft, which has several first stirring blades. The upper part of the housing is equipped with a drive box, and the upper part of the drive box is equipped with a drive motor. The output shaft of the drive motor is connected to the stirring shaft.

[0014] Furthermore, the drive box is equipped with a central gear, the upper part of which is connected to the drive motor, and the lower part of which is connected to the stirring shaft. Several planetary gears mesh on the outer side of the central gear, and the lower part of the planetary gears is connected to a rotating shaft. Several second stirring blades are connected to the rotating shaft, and the second stirring blades and the first stirring blades are arranged alternately in the vertical direction.

[0015] Furthermore, a spiral blade is connected to the lower end of the rotating shaft, and the spiral blade is disposed inside the feeding pipe.

[0016] Furthermore, the third outlet branch pipe is connected to a first bypass pipe and a second bypass pipe on one side. Each of the first bypass pipe and the second bypass pipe is equipped with a valve and a filter, with one filter in use and the other as a backup.

[0017] The beneficial effects of this invention are:

[0018] 1) This invention utilizes a water pump to circulate the sewage and PAC within the tank, creating a hydraulic stirring effect. This significantly improves the dissolution efficiency and mixing uniformity of PAC while reducing the footprint, manufacturing costs, and maintenance expenses, ensuring that PAC is fully dissolved and evenly distributed in the water.

[0019] 2) A first and second outlet branch pipe are installed on one side of the outlet pipe, with the second outlet branch pipe extending upward from the bottom of the tank to the surface of the sewage. The sewage is directly introduced into the bottom of the tank through the first outlet branch pipe, where it is initially mixed with the sewage inside the tank. At the same time, the second outlet branch pipe sprays the sewage down from the top of the tank, creating a spraying effect. This combined top and bottom water intake method greatly promotes the all-round and multi-level mixing of PAC and sewage, ensuring the uniformity of mixing and improving the coagulation effect.

[0020] 3) The first outlet branch pipe is tangentially connected to the front of the tank, and the inlet pipe is tangentially connected to the rear of the tank. A spiral guide plate is installed inside the tank so that after the sewage flows out of the first outlet branch pipe, it forms a swirling flow inside the tank. This swirling flow not only enhances the turbulent mixing between the sewage and PAC, but also promotes the full contact between suspended solids, colloids and other pollutants in the sewage and PAC particles. The swirling effect not only promotes mixing, but also helps the flocs in the sewage to gradually grow during the rotation process; thereby improving the rate and efficiency of the coagulation reaction.

[0021] 4) The upper part of the second water outlet branch pipe is connected to the nozzle through a rotary joint, and several baffles are set on the outside of the nozzle. The sprayed sewage forms a convection with the water flow from bottom to top in the tank. During the mixing process, the sewage forms a vortex inside the tank, which pushes the baffle to rotate, thereby driving the nozzle to rotate. This design makes the spraying process not just a simple static spraying, but a dynamic and active mixing method, which promotes the uniformity of mixing between PAC and sewage.

[0022] 5) By installing an insulation layer on the outside of the tank and incorporating a built-in heating device, the temperature of the wastewater inside the tank can be effectively controlled and maintained. For coagulants such as PAC, their coagulation effect is often affected by water temperature. Adjusting the water temperature through heating equipment ensures that the coagulation reaction takes place within the optimal temperature range, thereby improving coagulation efficiency and effluent quality.

[0023] 6) An agitator shaft is installed inside the housing, with a first agitator blade mounted on it. A rotating shaft is also installed inside the housing, with a second agitator blade mounted on it. The agitator shaft and the rotating shaft are connected by a planetary gear system, enabling the rotation of the agitator shaft to simultaneously drive the planetary gears and the second agitator blade to rotate in the opposite direction. This composite agitation method not only increases the layering and complexity of the agitation but also ensures that PAC is more comprehensively and thoroughly agitated within the housing. The staggered arrangement of the first and second agitator blades in the vertical direction further enhances the uniformity and efficiency of the agitation, effectively preventing PAC from clumping.

[0024] 7) A spiral blade is installed at the lower end of the rotating shaft. The spiral blade is installed inside the feeding pipe. The spiral blade not only avoids the blockage of the feeding pipe, but also helps to accurately control the amount of PAC added, so as to ensure the coagulation effect of the sewage.

[0025] 8) A first bypass pipe and a second bypass pipe are installed on one side of the third outlet branch pipe. Each of the first bypass pipe and the second bypass pipe is equipped with a valve and a filter, which effectively prevents incompletely settled flocs from flowing out of the third outlet branch pipe and entering the subsequent treatment equipment. This avoids the flocs from clogging or damaging the subsequent equipment. The two filters are used in one and standby, which allows one of the filters to be replaced or maintained without stopping the system. This improves the flexibility and reliability of the system, reduces downtime caused by filter maintenance, and ensures the continuous operation of the treatment system. Attached Figure Description

[0026] Appendix Figure 1 This is a schematic diagram of a hydraulically agitated PAC feeder according to the present invention.

[0027] Appendix Figure 2 This is a schematic diagram of the assembly of the chemical tank and the storage tank in a hydraulically stirred PAC chemical feeder of the present invention.

[0028] Appendix Figure 3 This is a schematic diagram of the inside of the chemical tank in a hydraulically stirred PAC chemicalizer of the present invention.

[0029] Appendix Figure 4 This is a schematic diagram of the second water outlet branch pipe in a hydraulically agitated PAC feeder of the present invention.

[0030] Appendix Figure 5 This is a schematic diagram of the internal structure of the medicine storage tank in a hydraulically stirred PAC feeder of the present invention.

[0031] Appendix Figure 6 This is a schematic diagram of the water pump in a hydraulically stirred PAC feeder of the present invention.

[0032] In the diagram: 1. Base; 2. Chemical tank; 21. First water outlet branch pipe; 22. Second water outlet branch pipe; 221. Rotary joint; 222. Nozzle; 223. Baffle; 23. Water inlet pipe; 24. Water filling pipe; 25. Sewage discharge pipe; 26. Tank body; 27. Insulation layer; 28. Feeding pipe; 29. ​​Spiral guide plate; 3. Chemical storage tank; 31. Box body; 32. Stirring shaft; 33. First stirring blade; 34. Rotating shaft; 35. Second stirring blade; 36. Spiral blade; 4. Drive box; 41. Central gear; 42. Planetary gear; 43. Drive motor; 5. Water pump; 51. Water outlet pipe; 52. Third water outlet branch pipe; 53. First bypass pipe; 54. Second bypass pipe; 55. Filter. Detailed Implementation

[0033] The following will be combined with the appendix Figures 1-6 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0035] like Figure 1 As shown, a hydraulically agitated PAC feeder includes a base 1, on which a feed tank 2 is mounted, such as... Figure 3 As shown, the chemical tank 2 includes a tank body 26. A water inlet pipe 24 is provided on one side of the upper part of the tank body 26. Wastewater to be treated is injected into the tank body 26 through the water inlet pipe 24. A drain pipe 25 is provided at the lower part of the tank 26, through which flocculants are discharged. Figure 2 As shown, a medicine storage box 3 is provided on the upper part of the tank 26, and the medicine storage box 3 includes a box body 31, as shown. Figure 3 As shown, a plurality of evenly arranged feeding pipes 28 are provided between the tank 26 and the box 31, and the multiple evenly distributed feeding pipes 28 ensure the uniformity of PAC feeding; as Figure 6As shown, a water pump 5 is provided on one side of the chemical tank 2. The water inlet pipe 23 of the water pump 5 is connected to the upper part of the chemical tank 2, and the water outlet pipe 51 of the water pump 5 is connected to the bottom of the chemical tank 2. A third water outlet branch pipe 52 is provided on one side of the water outlet pipe 51. Valves are provided on the water inlet pipe 23, the water outlet pipe 51, the water supply pipe 24, the sewage discharge pipe 25 and the third water outlet branch pipe 52.

[0036] During water treatment, wastewater is injected into the tank 26, and then PAC is added to the tank 26 in multiple directions through the chemical storage tank 3 at the top of the tank 26. At the same time, the water pump 5 is started. The water inlet pipe 23 of the water pump 5 draws out the wastewater in the tank 26 and injects the wastewater back into the bottom of the tank 26 through the water outlet pipe 51. The wastewater circulates in the tank 26 under the action of the water pump 5. While reducing the footprint, manufacturing cost and maintenance cost, it significantly improves the dissolution efficiency and mixing uniformity of PAC, ensuring that PAC is fully dissolved and evenly distributed in the water.

[0037] like Figure 2 As shown, the outlet pipe 51 is connected to a first outlet branch pipe 21 and a second outlet branch pipe 22 on one side. The first outlet branch pipe 21 is connected to the bottom of the tank 26. Figure 3 As shown, the second outlet branch pipe 22 extends upward from the bottom of the tank 26 to the surface of the sewage; the sewage is directly introduced into the bottom of the tank 26 through the first outlet branch pipe 21, where it is initially mixed with the sewage in the tank. At the same time, the second outlet branch pipe 22 sprays the sewage down from the top of the tank 26, forming a spraying effect. This combined top and bottom water intake method greatly promotes the all-round and multi-level mixing of PAC and sewage, ensuring the uniformity of mixing and improving the coagulation effect.

[0038] like Figure 2 As shown, the first outlet branch pipe 21 is tangentially connected to the front of the tank 26, causing the sewage to form a swirling flow inside the tank 26 after flowing out of the first outlet branch pipe 21. This swirling flow not only enhances the turbulent mixing between the sewage and PAC, but also promotes full contact between suspended solids, colloids, and other pollutants in the sewage and PAC particles. The swirling effect not only promotes mixing but also helps the flocs in the sewage to gradually grow during the rotation, thereby improving the rate and efficiency of the coagulation reaction. The inlet pipe 23 is tangentially connected to the rear of the tank 26. The inlet pipe 23 and the first outlet pipe 51 are installed in the vertical and horizontal directions of the tank 26, and are both tangentially connected to the tank 26, further ensuring the swirling effect of the sewage inside the tank 26. Figure 3As shown, a spiral guide plate 29 is provided on the inner wall of the tank 26. After the sewage flows tangentially into the tank 26, it is guided by the spiral guide plate 29 and forms a strong swirling flow along the inner wall of the tank 26. This design not only prolongs the flow path of the sewage in the tank 26, but also increases the contact time and contact area between the sewage and PAC, thereby significantly enhancing the swirling effect and improving the mixing efficiency. In addition, the design of the spiral guide plate 29 enables the sewage to form a stable and continuous swirling flow in the tank 26, avoiding the mixing dead zones that may occur in traditional stirring methods.

[0039] like Figure 4 As shown, the second outlet branch pipe 22 is provided with a nozzle 222 at the top. The nozzle 222 has several spray holes on the outside. The sprayed sewage forms a convection with the water flow from bottom to top in the tank 26, making the spraying effect more uniform and covering a wider area of ​​the upper part of the tank 26, thereby further promoting the uniformity of the mixing of PAC and sewage.

[0040] like Figure 4 As shown, the nozzle 222 is rotatably connected to the upper end of the second outlet branch pipe 22 via a rotary joint 221. Several baffles 223 are fixedly connected to the outside of the nozzle 222, with the lower ends of the baffles 223 extending into the sewage. After the sewage forms a vortex inside the tank 26, it pushes the baffles 223 to rotate, thereby causing the nozzle 222 to rotate. This design transforms the spraying process from a simple static spraying into a dynamic and active mixing method. The rotation of the nozzle 222 results in a wider coverage area for the sewage spray, and the spray direction constantly changes, thus avoiding the problem of uneven mixing in certain areas. Simultaneously, the presence of the baffles 223 further disrupts the vortex structure, allowing particles and PAC in the sewage to contact and collide more fully, improving the uniformity of mixing. Since the rotation of the nozzle 222 is achieved by the kinetic energy of the vortex, no additional power source is required, thus reducing the system's energy consumption.

[0041] like Figure 3 As shown, the tank 26 is externally equipped with an insulation layer 27, and a heating device is installed inside the insulation layer 27. The heating device includes an electric heating wire or a steam pipe. By setting an insulation layer 27 on the outside of the tank 26 and installing a heating device inside, the temperature of the wastewater inside the tank 26 can be effectively controlled and maintained. For coagulants such as PAC, their coagulation effect is often affected by water temperature. By adjusting the water temperature through the heating device, it can be ensured that the coagulation reaction takes place within the optimal temperature range, thereby improving coagulation efficiency and effluent quality.

[0042] like Figure 5As shown, the tank 31 is equipped with a stirring shaft 32 inside, and a plurality of first stirring blades 33 are provided on the stirring shaft 32. A drive box 4 is provided on the upper part of the tank 31, and a drive motor 43 is provided on the upper part of the drive box 4. The output shaft of the drive motor 43 is connected to the stirring shaft 32. The stirring shaft 32 is used to stir the PAC in the storage tank 3, which avoids PAC clumping. Keeping PAC in a loose state helps it to dissolve and disperse better in the sewage, thereby improving the coagulation effect.

[0043] like Figure 5 As shown, the drive housing 4 is equipped with a central gear 41. The upper part of the central gear 41 is connected to the drive motor 43, and the lower part of the central gear 41 is connected to the stirring shaft 32. Several planetary gears 42 mesh with the outer side of the central gear 41. The lower part of the planetary gears 42 is connected to a rotating shaft 34, and several second stirring blades 35 are connected to the rotating shaft 34. The second stirring blades 35 and the first stirring blades 33 are arranged alternately in the vertical direction. By setting a meshing transmission mechanism of the central gear 41 and the planetary gears 42 inside the drive housing 4, the rotation of the stirring shaft 32 simultaneously drives the planetary gears 42 and the second stirring blades 35 to rotate in the opposite direction. This composite stirring method not only increases the layering and complexity of the stirring, but also makes the PAC more comprehensive and thorough in the housing 31. The alternate arrangement of the first stirring blades 33 and the second stirring blades 35 in the vertical direction further enhances the uniformity and efficiency of the stirring, effectively avoiding the clumping of PAC.

[0044] like Figure 5 As shown, the lower end of the rotating shaft 34 is connected to a spiral blade 36, which is disposed inside the feeding pipe 28. The spiral blade 36 not only avoids clogging of the feeding pipe 28, but also helps to accurately control the amount of PAC added, thus ensuring the coagulation effect of the wastewater.

[0045] like Figure 6 As shown, the third outlet branch pipe 52 is connected to a first bypass pipe 53 and a second bypass pipe 54 on one side. Each of the first bypass pipe 53 and the second bypass pipe 54 is equipped with a valve and a filter 55, which effectively prevents incompletely settled flocs from flowing out of the third outlet branch pipe 52 and entering the subsequent treatment equipment, avoiding clogging or damage to the subsequent equipment caused by the flocs. The two filters 55 are used in one and standby in the other, so that one of the filters 55 can be replaced or maintained without stopping the system, which improves the flexibility and reliability of the system, reduces the downtime caused by filter 55 maintenance, and ensures the continuous operation of the treatment system.

[0046] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A hydraulic stirring PAC material mixing device, comprising a base, a material mixing tank is installed on the base, the material mixing tank comprises a tank body, a water feeding pipe is arranged on one side of the upper part of the tank body, sewage to be treated is injected into the tank body from the water feeding pipe, a sewage discharging pipe is arranged at the lower part of the tank body, and flocculation is discharged from the sewage discharging pipe; a medicine storage box is arranged at the upper part of the tank body, the medicine storage box comprises a box body, and a plurality of uniformly arranged feeding pipes are arranged between the tank body and the box body; characterized in that, The water pump is provided on one side of the tank, the water inlet pipe of the water pump is connected with the upper part of the tank, the water outlet pipe of the water pump is connected with the bottom of the tank, a third water outlet branch pipe is provided on one side of the water outlet pipe, and valves are arranged on the water inlet pipe, the water outlet pipe, the water filling pipe, the sewage pipe and the third water outlet branch pipe; a first water outlet branch pipe and a second water outlet branch pipe are connected with one side of the water outlet pipe, the first water outlet branch pipe is communicated with the bottom of the tank body, the second water outlet branch pipe extends upwards from the bottom of the tank body to above the water surface of the sewage, the first water outlet branch pipe is tangentially connected with the front part of the tank body, the water inlet pipe is tangentially connected with the rear part of the tank body, and spiral guide plates are arranged on the inner wall of the tank body; a spray head is arranged on the upper part of the second water outlet branch pipe, a plurality of water spraying holes are arranged on the outer part of the spray head, the spray head is rotatably connected with the upper end of the second water outlet branch pipe through a rotary joint, and a plurality of baffles are fixedly connected with the outer part of the spray head, and the lower ends of the baffles extend into the sewage.

2. The hydraulic agitation PAC charger according to claim 1, wherein, The tank body is externally provided with a heat preservation layer, and a heating device is arranged in the heat preservation layer.

3. The hydraulic agitation PAC charger according to claim 1, wherein, A stirring shaft is arranged in the box body, a plurality of first stirring paddles are arranged on the stirring shaft, a driving box is arranged on the upper part of the box body, a driving motor is arranged on the upper part of the driving box, and the output shaft of the driving motor is connected with the stirring shaft.

4. The hydraulic agitation PAC charger according to claim 3, wherein, A central gear is arranged in the driving box, the upper part of the central gear is connected with the driving motor, the lower part of the central gear is connected with the stirring shaft, a plurality of planetary gears are meshed with the outer side of the central gear, a rotating shaft is connected with the lower part of each planetary gear, a plurality of second stirring blades are arranged on the rotating shaft, and the second stirring blades and the first stirring paddles are arranged in a staggered manner in the vertical direction.

5. The hydraulic agitation PAC charger according to claim 4, wherein, A spiral blade is connected with the lower end of the rotating shaft, and the spiral blade is arranged in the feeding pipe.

6. A hydraulic agitation PAC charger according to any one of claims 1-5, characterized in that, The first bypass pipe and the second bypass pipe are connected with one side of the third water outlet branch pipe, a valve and a filter are arranged on each of the first bypass pipe and the second bypass pipe, and one filter is used and the other is standby.

Images