Mixed conditioning device for dewatered sludge

Abstract

The utility model belongs to the technical field of dewatered sludge treatment, and particularly discloses a dewatered sludge mixing and conditioning device which comprises a mixing bin, and a mixing component is arranged in the mixing bin; the mixing assembly is used for mixing a sludge conditioner and dewatered sludge and comprises two rotating shafts, and the outer walls of the two rotating shafts are fixedly connected with a plurality of stirring paddles; two rotating shafts are arranged in the mixing bin, two stirring paddles are arranged on the rotating shafts, two liquid inlet pipes are arranged in the mixing bin, the bottoms of the two liquid inlet pipes are communicated with connecting pipes, and the bottoms of the two connecting pipes are communicated with a plurality of nozzles. Dehydrated sludge and a sludge conditioner in the mixing bin are intensively stirred, the sludge can form a complex flowing path in the bin from different angles through the double-rotating-shaft design, stirring dead angles are avoided, meanwhile, the sludge conditioner reaches the multiple nozzles through the liquid inlet pipe and the connecting pipe and is evenly sprayed out, and the stirring effect is improved under continuous stirring of the stirring paddle.

Description

Technical Field

[0001] The present application relates to the technical field of dewatered sludge, and more specifically, to a dewatered sludge mixing and conditioning device. Background Art

[0002] With the acceleration of urbanization and industrial development, wastewater discharge is increasing. Various physical, chemical, and biological methods are widely used in wastewater treatment, inevitably generating large amounts of sludge. This sludge typically contains a large amount of water and is initially liquid or semi-solid. It possesses a complex composition, including organic matter, inorganic matter, microorganisms, and possible contaminants such as heavy metals. According to statistics, sewage treatment plants produce approximately 5-10 tons (dry weight) of sludge for every 10,000 cubic meters of wastewater they treat. If not properly treated, this sludge can cause serious environmental pollution, such as occupying land resources, contaminating soil and water, and spreading pathogens. Sludge conditioning is an effective method for improving the properties of dewatered sludge. Adding conditioners to dewatered sludge can modify its physical and chemical properties, such as reducing sludge viscosity, improving dewatering performance, and promoting sludge particle coagulation. However, achieving the optimal effect of sludge conditioners requires ensuring that they are thoroughly and evenly mixed with the dewatered sludge.

[0003] The existing sludge and conditioner mixing methods have many limitations. Most sludge mixing devices are simple single-axis stirring or traditional stirring forms, which leads to uneven stirring. The sludge close to the stirring shaft moves rapidly, while the area farther away from the stirring shaft becomes a stirring dead corner, which greatly affects the uniformity of mixing of sludge and conditioner. In addition, the drug distribution method also has obvious defects. Traditional drug distribution methods are mostly single-point or simple linear drug distribution. This method will inevitably cause the distribution of the conditioner in the sludge to be extremely uneven. Part of the sludge may receive excessive conditioner due to the passing of the drug distribution point or drug distribution line, while other parts cannot obtain enough conditioner due to insufficient drug distribution, affecting the mixing effect. Utility Model Content

[0004] In order to solve the above problems, the present application provides a dewatered sludge mixing and conditioning device.

[0005] The dewatered sludge mixing and conditioning device provided in this application adopts the following technical solution:

[0006] A dewatered sludge mixing and conditioning device comprises a mixing bin with a mixing assembly provided inside the mixing bin;

[0007] The mixing assembly is used for mixing the sludge conditioner with the dewatered sludge, and includes two rotating shafts, with multiple stirring paddles fixedly connected to the outer walls of the two rotating shafts;

[0008] Two liquid inlet pipes are provided inside the mixing bin, the bottoms of the two liquid inlet pipes are connected with connecting pipes, the bottoms of the two connecting pipes are connected with multiple nozzles, and the spacing between the multiple nozzles is equal to the spacing between the stirring paddles.

[0009] Through the above technical solution, the driving motor drives the two shafts to rotate, and the multiple stirring paddles on the shafts rotate accordingly, vigorously stirring the dewatered sludge and sludge conditioner in the mixing bin. The dual-shaft design can form complex flow paths for the sludge in the bin from different angles, avoiding dead corners of stirring. At the same time, the sludge conditioner reaches multiple nozzles through the liquid inlet pipe and the connecting pipe and is sprayed evenly. Under the continuous stirring of the stirring paddles, the newly sprayed conditioner is continuously mixed with the surrounding sludge. This synchronous and uniform mixing method not only enables the conditioner to fully play its role, but also avoids the problem of local excess or deficiency, thereby improving the stirring effect.

[0010] Furthermore, one end of each liquid inlet pipe extends through the outside of the mixing chamber, and one end of each of the two rotating shafts extends through the outside of the mixing chamber.

[0011] Furthermore, a driving motor is provided on one side of the mixing bin, and an outer end of one rotating shaft is fixedly connected to an output end of the driving motor.

[0012] Furthermore, one of the rotating shafts is connected to the other rotating shaft through a synchronous belt, and an auxiliary mixing component is provided at one end of the mixing chamber away from the driving motor.

[0013] Furthermore, the auxiliary mixing component includes an aeration pump, both ends of the aeration pump are connected with air pipes, and one end of one of the air pipes extends through the interior of the mixing bin and is connected with a diversion pipe.

[0014] Through this technical solution, the air delivered by the aeration pump forms a large number of tiny bubbles in the mixing chamber. These bubbles further disturb the sludge as they rise, working in conjunction with the stirring action of the agitator to more thoroughly mix the sludge and conditioning agent. The agitation of the bubbles also disperses the conditioning agent sprayed from the nozzle more evenly within the sludge in three dimensions, enhancing the mixing effect.

[0015] Furthermore, one-way valves are provided at both ends of the diversion pipe, and a feed port is provided at the top of the mixing bin.

[0016] Through the above technical solution, the one-way valve sludge and conditioning agent enter the inside of the diversion pipe and the gas transmission pipe.

[0017] Furthermore, an end of the mixing bin away from the feed port is connected to a discharge port, and valves are provided inside the feed port and the discharge port.

[0018] Furthermore, a processing box is provided on the top of the mixing bin, and an air pump is provided above the processing box. Both ends of the air pump are connected with pipe bodies, one of which extends through the interior of the mixing bin and is connected with an air collecting hood, and one end of the other pipe extends through the interior of the processing box, and a plurality of filter screens are provided inside the processing box, and one end of the processing box is connected with an air outlet pipe.

[0019] Through the above technical solution, the filtered gas is discharged through the exhaust pipe, avoiding the emission of a large amount of high-concentration odorous gas during discharging, effectively maintaining the air quality around the workplace, and preventing operators from being stimulated by strong odors during discharging operations, thereby improving work comfort and safety.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] (1) The utility model drives two rotating shafts to rotate through a driving motor, and multiple stirring paddles on the rotating shafts rotate accordingly, thereby strongly stirring the dewatered sludge and sludge conditioner in the mixing bin. The dual-rotating shaft design can form a complex flow path for the sludge in the bin from different angles, avoiding stirring dead corners. At the same time, the sludge conditioner reaches multiple nozzles through the liquid inlet pipe and the connecting pipe and is sprayed out evenly. Under the continuous stirring of the stirring paddles, the newly sprayed conditioner is continuously mixed with the surrounding sludge. This synchronous and uniform mixing method not only enables the conditioner to fully play its role, but also avoids the problem of local excess or deficiency, thereby improving the stirring effect;

[0022] (2) The air delivered by the aeration pump of the present invention forms a large number of tiny bubbles in the mixing chamber. These bubbles further disturb the sludge during the rising process, and cooperate with the stirring action of the stirring paddle to make the sludge and conditioning agent mixed more thoroughly. The disturbance of the bubbles can also make the conditioning agent sprayed from the nozzle more evenly dispersed in the sludge in three-dimensional space, thereby enhancing the mixing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of the mixing bin of the present utility model;

[0025] Figure 3 It is a plan view of the utility model;

[0026] Figure 4 This is a schematic diagram of the connection structure between the gas transmission pipe and the diversion pipe of the utility model;

[0027] Figure 5 This is a schematic diagram of the internal structure of the processing box of the present utility model.

[0028] Explanation of the accompanying symbols: 1. Mixing bin; 2. Feed port; 3. Discharge port; 4. Liquid inlet pipe; 5. Drive motor; 6. Connecting pipe; 7. Nozzle; 8. Rotating shaft; 9. Agitator; 10. Aeration pump; 11. Air outlet pipe; 12. Air supply pipe; 13. Diversion pipe; 14. One-way valve; 15. Gas collecting hood; 16. Pipe body; 17. Processing box; 18. Vacuum pump; 19. Filter. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0030] Reference Figure 1-Figure 5 , a dewatered sludge mixing and conditioning device, comprising a mixing bin 1, wherein a mixing assembly is provided inside the mixing bin 1;

[0031] The mixing assembly is used to mix the sludge conditioner with the dewatered sludge, and includes a rotating shaft 8. The number of the rotating shafts 8 is set to two, and a plurality of stirring paddles 9 are fixedly connected to the outer walls of the two rotating shafts 8;

[0032] Two liquid inlet pipes 4 are provided inside the mixing bin 1 , and the bottoms of the two liquid inlet pipes 4 are connected to connecting pipes 6 , and the bottoms of the two connecting pipes 6 are connected to multiple nozzles 7 , and the distance between the multiple nozzles 7 is equal to the spacing between the stirring paddles 9 .

[0033] Driven by a drive motor 5, the two rotating shafts 8 rotate. Multiple agitating paddles 9 are fixedly attached to the outer walls of the rotating shafts 8. As the rotating shafts 8 rotate, the agitating paddles 9 rotate accordingly. These agitating paddles 9 vigorously stir the dewatered sludge and sludge conditioner within the mixing chamber 1. The design of the two rotating shafts 8 allows the materials to be stirred from different angles, creating a complex flow path within the mixing chamber 1 and avoiding dead zones. This ensures that the sludge and conditioner are fully agitated in three dimensions.

[0034] The conditioner enters the bottom connecting pipe 6 through the liquid inlet pipe 4 and then reaches multiple nozzles 7 through the connecting pipe 6. The sludge conditioner sprayed from the nozzles 7 can be evenly distributed in the agitated sludge. Under the continuous stirring of the stirring paddle 9, the newly sprayed conditioner is continuously mixed with the surrounding sludge, so that the conditioner and sludge are mixed synchronously and evenly during the agitation process.

[0035] The dewatered sludge mixing and conditioning device drives two rotating shafts 8 to rotate through a driving motor 5, and multiple stirring paddles 9 on the rotating shafts 8 rotate accordingly, thereby vigorously stirring the dewatered sludge and sludge conditioner in the mixing bin 1. The double rotating shaft 8 design can form complex flow paths for the sludge in the bin from different angles, avoid dead corners of stirring, and achieve sufficient stirring in three-dimensional space; at the same time, the sludge conditioner reaches multiple nozzles 7 through the liquid inlet pipe 4 and the connecting pipe 6 and is sprayed out evenly. Under the continuous stirring of the stirring paddles 9, the newly sprayed conditioner is continuously mixed with the surrounding sludge. This synchronous and uniform mixing method not only enables the conditioner to fully play its role, avoids the problem of local excess or deficiency, effectively improves the physical and chemical properties of the sludge, enhances the dewatering performance of the sludge, but also improves the subsequent treatment efficiency, and ensures the smooth progress of the entire sludge treatment process.

[0036] Reference Figure 1-Figure 2 One end of each liquid inlet pipe 4 extends through the outside of the mixing bin 1, and one end of the two rotating shafts 8 extends through the outside of the mixing bin 1. A driving motor 5 is provided on one side of the mixing bin 1, and the outer end of one rotating shaft 8 is fixedly connected to the output end of the driving motor 5. One of the rotating shafts 8 is connected to the other rotating shaft 8 through a synchronous belt. An auxiliary mixing assembly is provided at the end of the mixing bin 1 away from the driving motor 5.

[0037] Reference Figure 2-Figure 4 The auxiliary mixing assembly includes an aeration pump 10 , both ends of the aeration pump 10 are connected with air pipes 12 , one end of one of the air pipes 12 extends through the interior of the mixing bin 1 and is connected with a diversion pipe 13 .

[0038] After the aeration pump 10 is started, it draws in air from the outside and compresses it. The compressed air is transported through the air pipes 12 at both ends. One of the air pipes 12 transports the air into the mixing bin 1 and passes through the diverter pipe 13 connected to it. The diverter pipe 13 will further disperse the air entering the mixing bin 1, so that the air is more evenly distributed in the mixing bin 1. While the stirring paddle 9 stirs the dewatered sludge and sludge conditioner, and the conditioner is evenly sprayed through the nozzle 7, the air transported by the aeration pump 10 forms a large number of tiny bubbles in the mixing bin 1. These bubbles will further disturb the sludge during the rising process, and cooperate with the stirring action of the stirring paddle 9 to make the sludge and conditioner mix more fully. The disturbance of the bubbles can also make the conditioner sprayed from the nozzle 7 more evenly dispersed in the sludge in three-dimensional space, thereby enhancing the mixing effect.

[0039] Reference Figure 2-Figure 4 A one-way valve 14 is provided at both ends of the diversion pipe 13, a feed port 2 is provided at the top of the mixing bin 1, and a discharge port 3 is provided at the end of the mixing bin 1 away from the feed port 2. Valves are provided inside the feed port 2 and the discharge port 3.

[0040] When aeration pump 10 delivers air to diversion pipe 13 through air delivery pipe 12, the air pushes open check valve 14, allowing air to smoothly enter diversion pipe 13 and diffuse within mixing chamber 1. However, if substances (such as sludge, conditioning agents, etc.) within mixing chamber 1 tend to flow in the opposite direction, check valve 14 closes due to the pressure differential and its own structure, preventing these substances from entering diversion pipe 13 and air delivery pipe 12, thereby protecting aeration pump 10 and related equipment from contamination and damage.

[0041] When dewatered sludge and sludge conditioner need to be added to mixing silo 1, the valve at feed port 2 is opened, and the materials enter mixing silo 1 through feed port 2. After mixing is complete, the valve at discharge port 3 is opened, and the mixed and conditioned sludge is discharged from discharge port 3 for subsequent processing. The presence of the valve precisely controls the material inlet and outlet timing and flow rate, ensuring that the mixing process in mixing silo 1 is not disturbed by external factors and maintaining the sealing of mixing silo 1 when discharge is not required.

[0042] Reference Figure 4-Figure 5 A processing box 17 is provided on the top of the mixing bin 1, and an air pump 18 is provided above the processing box 17. Both ends of the air pump 18 are connected with a pipe body 16. One of the pipe bodies 16 extends through the interior of the mixing bin 1 and is connected with an air collecting hood 15. One end of the other pipe body 16 extends through the interior of the processing box 17. A plurality of filter screens 19 are provided inside the processing box 17. One end of the processing box 17 is connected with an air outlet pipe 11.

[0043] The odorous gas generated in the mixing bin 1 is collected by the vacuum pump 18. The vacuum pump 18 extracts the gas in the mixing bin 1 through the tube body 16 at one end and the gas collecting hood 15 connected thereto, and the extracted gas enters the inside of the processing box 17 through the tube body 16. In the processing box 17, the gas must pass through multiple filters 19. These filters 19 can filter the gas according to their different materials and pore sizes. For example, dust particles, some odorous substances or other impurities in the gas may be filtered out. The filtered gas is discharged through the outlet pipe 11, avoiding the release of a large amount of high-concentration odorous gas during discharging, effectively maintaining the air quality around the workplace, and preventing operators from being stimulated by strong odors during discharging operations, thereby improving work comfort and safety.

[0044] Working principle: First, dewatered sludge is added to the mixing bin 1 through the feed port 2. After the addition is completed, the valves of the feed port 2 and the discharge port 3 are both closed. The sludge conditioner is transported to the nozzle 7 through the liquid inlet pipe 4 by an external drive device and evenly sprayed out. Then the drive motor 5 is started, which drives one of the rotating shafts 8 to rotate. This rotating shaft 8 rotates the other rotating shaft 8 synchronously through a synchronous belt. The multiple stirring paddles 9 on the two rotating shafts 8 then vigorously stir the dewatered sludge and conditioner in the bin. The design of the two rotating shafts 8 allows the sludge to form a complex flow path in the mixing bin 1, avoiding dead corners and achieving sufficient stirring in three dimensions.

[0045] Aeration pump 10 is then activated, drawing in and compressing air from the outside. The compressed air is then transported through air pipes 12, one of which delivers the air to diverter pipes 13 within mixing chamber 1. The air pushes open the one-way valves 14 at either end of diverter pipe 13, allowing the air to evenly diffuse within mixing chamber 1, forming a large number of tiny bubbles. These bubbles further disturb the sludge as they rise, and combined with the stirring action of paddles 9, they ensure a more complete mixing of the sludge and conditioning agent, and a more even dispersion of the conditioning agent within the sludge in three dimensions. If the material within mixing chamber 1 shows signs of reverse flow, the one-way valves 14 close, protecting the aeration pump 10 and other equipment.

[0046] During the mixing process, the vacuum pump 18 works to collect the odorous gas generated in the mixing chamber 1 through the gas collecting hood 15 and the pipe body 16. The gas enters the treatment box 17 through the pipe body 16. The multiple filters 19 in the treatment box 17 filter the gas to remove impurities such as dust particles and some odorous substances. The filtered gas is discharged through the outlet pipe 11.

[0047] After the mixing is completed, the valve of the discharge port 3 is opened, and the mixed and conditioned sludge is discharged from the discharge port 3 and sent to the subsequent processing link. The valves of the feed port 2 and the discharge port 3 can accurately control the material inlet and outlet time and flow rate, ensuring that the mixing process is not disturbed by the outside world and maintaining the sealing of the mixing bin 1 when discharge is not required.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A dewatered sludge mixing and conditioning device, characterized in that: include: A mixing chamber (1), wherein a mixing assembly is provided inside the mixing chamber (1); The mixing assembly is used for mixing a sludge conditioner with dewatered sludge, and comprises a rotating shaft (8), wherein the number of the rotating shafts (8) is set to two, and a plurality of stirring paddles (9) are fixedly connected to the outer walls of the two rotating shafts (8); Two liquid inlet pipes (4) are provided inside the mixing chamber (1), and the bottoms of the two liquid inlet pipes (4) are connected to a connecting pipe (6), and the bottoms of the two connecting pipes (6) are connected to a plurality of nozzles (7), and the spacing between the plurality of nozzles (7) is equal to the spacing between the stirring paddles (9).

2. The dewatered sludge mixing and conditioning device according to claim 1, characterized in that: One end of each of the liquid inlet pipes (4) extends through the outside of the mixing chamber (1), and one end of each of the two rotating shafts (8) extends through the outside of the mixing chamber (1).

3. The dewatered sludge mixing and conditioning device according to claim 1, characterized in that: A drive motor (5) is provided on one side of the mixing bin (1), wherein the outer end of one of the rotating shafts (8) is fixedly connected to the output end of the drive motor (5).

4. The dewatered sludge mixing and conditioning device according to claim 3, characterized in that: One of the rotating shafts (8) is connected to the other rotating shaft (8) via a synchronous belt, and an auxiliary mixing component is provided at one end of the mixing chamber (1) away from the driving motor (5).

5. The dewatered sludge mixing and conditioning device according to claim 4, characterized in that: The auxiliary mixing assembly comprises an aeration pump (10), both ends of the aeration pump (10) are connected to an air delivery pipe (12), and one end of one of the air delivery pipes (12) extends through the interior of the mixing bin (1) and is then connected to a diversion pipe (13).

6. The dewatered sludge mixing and conditioning device according to claim 5, characterized in that: Both ends of the diversion pipe (13) are provided with a one-way valve (14), and the top of the mixing bin (1) is connected to a feed port (2).

7. The dewatered sludge mixing and conditioning device according to claim 1, characterized in that: An end of the mixing bin (1) away from the feed port (2) is connected to a discharge port (3), and valves are provided inside the feed port (2) and the discharge port (3).

8. The dewatered sludge mixing and conditioning device according to claim 1, characterized in that: A processing box (17) is provided on the top of the mixing bin (1), and an air extraction pump (18) is provided above the processing bin (17). Both ends of the air extraction pump (18) are connected to a pipe body (16), one of the pipe bodies (16) extends through the interior of the mixing bin (1) and is connected to an air collecting hood (15), and one end of the other pipe body (16) extends through the interior of the processing bin (17), and a plurality of filter screens (19) are provided inside the processing bin (17). One end of the processing bin (17) is connected to an air outlet pipe (11).

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