A sludge pump for sewage treatment

Abstract

This invention relates to the field of wastewater treatment technology, specifically to a sludge pump for wastewater treatment, comprising a sludge pretreatment device and a sludge conveying device. The sludge pretreatment device includes a sludge inlet pipe and a crushing mechanism disposed within the sludge inlet pipe for crushing the sludge entering the pipe. The crushing mechanism includes a crushing roller assembly and a second drive motor for driving the crushing roller assembly to rotate. The sludge conveying device includes a discharge pipe, a helical impeller disposed along the axis of the discharge pipe, and a first drive motor disposed outside the discharge pipe for driving the helical impeller to rotate. The outlet end of the sludge inlet pipe communicates with the inner cavity of the discharge pipe, allowing the sludge crushed by the crushing mechanism to enter the discharge pipe. This solution reduces damage to the pump body and improves sludge conveying efficiency by crushing lumps in the sludge before conveying it.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically to a sludge pump for wastewater treatment. Background Technology

[0002] Sludge pumps are generally used for transporting sludge generated from wastewater treatment and papermaking. During wastewater treatment, it is necessary to remove the generated sludge in a timely manner to ensure the continuous operation of the wastewater treatment process. However, in the process of wastewater treatment, existing sludge pumps are prone to clogging and damage because the sludge contains a lot of other hard waste or lumpy sludge. When the sludge pump is working, these lumpy materials and hard waste enter the sludge pump, which can affect its normal sludge transport operation, reduce sludge transport efficiency, and further reduce wastewater treatment efficiency. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a sludge pump for sewage treatment, which reduces the damage of sludge to the pump body and improves the sludge conveying efficiency by crushing the lumps in the sludge before conveying it.

[0004] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is: to provide a sludge pump for sewage treatment, including a sludge pretreatment device and a sludge conveying device. The sludge pretreatment device includes a sludge inlet pipe and a crushing mechanism disposed inside the sludge inlet pipe for crushing the sludge entering the sludge inlet pipe. The crushing mechanism includes a crushing roller group and a second drive motor for driving the crushing roller group to rotate. The sludge conveying device includes a sewage discharge pipe, a spiral impeller disposed along the axis of the sewage discharge pipe, and a first drive motor disposed outside the sewage discharge pipe for driving the spiral impeller to rotate. The outlet end of the sludge inlet pipe is connected to the inner cavity of the sewage discharge pipe so that the sludge crushed by the crushing mechanism enters the sewage discharge pipe.

[0005] By using the above settings, the sludge to be transported is first crushed before being transported, which greatly reduces the sludge lumps and hard debris in the sludge, effectively reducing the damage of the sludge to the sludge pump and preventing the sludge pump from being blocked due to the presence of sludge lumps and hard debris in the sludge. Attached Figure Description

[0006] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0007] Figure 1 This is a structural schematic diagram of the present invention from the front view direction.

[0008] Figure 2 for Figure 1Sectional view of AA.

[0009] Figure 3 for Figure 1 BB section view.

[0010] Figure 4 This is a schematic diagram of the conical rotating barrel and connecting rod in the left view direction.

[0011] The meanings of the labels in the attached diagram are as follows:

[0012] Mud inlet pipe-10; outer pipe-101; rear pipe-1011; front pipe-1012; mud inlet hole-1013; inner pipe-102; mud outlet hole-1021; mud outlet channel-1022; annular space-103; square cavity-104; second drive motor-201; main crushing roller-202; drive shaft-2021; drive gear-2022; auxiliary crushing roller-203; driven shaft-2031; driven gear-2032; sewage pipe-30; first drive motor-301; transmission shaft-302; spiral blade-303; conical rotating barrel-40; third drive motor-401; discharge hole-402; first rotating shaft-403; connecting rod-404; spiral plate-405. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0015] This embodiment provides a sludge pump for wastewater treatment, such as... Figures 1-3As shown, the device includes a sludge pretreatment device and a sludge conveying device. The sludge pretreatment device includes a sludge inlet pipe 10, a sludge-water separation mechanism, and a crushing mechanism disposed inside the sludge inlet pipe 10 for crushing the sludge entering the sludge inlet pipe 10. The crushing mechanism includes a crushing roller assembly and a second drive motor 201 for driving the crushing roller assembly to rotate. The sludge conveying device includes a discharge pipe 30, a spiral impeller disposed along the axis of the discharge pipe 30, and a first drive motor 301 disposed outside the discharge pipe 30 for driving the spiral impeller to rotate. The outlet end of the sludge inlet pipe 10 is connected to the inner cavity of the discharge pipe 30 so that the sludge crushed by the crushing mechanism enters the discharge pipe 30.

[0016] Further, the sludge inlet pipe 10 includes an outer pipe 101 and an inner pipe 102. The inner pipe 102 is disposed inside the outer pipe 101 and coaxially disposed with the outer pipe 101. The length of the inner pipe 102 is less than that of the outer pipe 101. An annular space 103 is formed between the outer wall of the inner pipe 102 and the inner wall of the outer pipe 101. The second end of the inner pipe 102 is integrally formed with the second end of the outer pipe 101. A sludge outlet hole 1021 is provided on the side wall of the second end of the inner pipe 102, which connects the annular space 103 with the sludge outlet channel 1022 of the inner pipe 102. A sludge inlet hole 1013 is provided on the side wall of the first end of the outer pipe 101, which allows sludge to enter the inner cavity of the outer pipe 101.

[0017] The mud-water separation mechanism includes a conical rotating barrel 40 and a third drive motor 401 that drives the conical rotating barrel 40 to rotate. The conical rotating barrel 40 is disposed inside the outer tube 101 and is coaxially disposed with the outer tube 101. The large end of the conical rotating barrel 40 is close to the first end of the outer tube 101. The large end of the conical rotating barrel 40 is rotatably connected to the inner wall of the outer tube 101. The small end of the conical rotating barrel 40 is rotatably connected to the first end of the inner tube 102, so that the conical rotating barrel 40 is in sealed communication with the inner cavity of the inner tube 102.

[0018] like Figure 1 , Figure 4 As shown, the conical rotating barrel 40 has several discharge holes 402 evenly distributed on its side wall, which connect the annular space 103 to the inner cavity of the conical rotating barrel 40. The inner wall of the conical rotating barrel 40 has a plurality of spiral plates 405 evenly distributed circumferentially. When the third drive motor 401 drives the conical rotating barrel 40 to rotate, the spiral plates 405 squeeze the sludge towards the inner tube 102.

[0019] The third drive motor 401 is disposed on the outer wall of the first end of the outer tube 101. A first rotating shaft 403 is fixedly connected to the output shaft of the third drive motor 401. The first rotating shaft 403 is coaxially disposed with the conical rotating barrel 40. Four connecting rods 404 are radially distributed on the same circumference coaxial with the first rotating shaft 403. In this embodiment, four connecting rods 404 are provided. In other feasible embodiments, other numbers of connecting rods 404 can be provided according to actual conditions. One end of the connecting rod 404 is fixedly connected to the first rotating shaft 403, and the other end of the connecting rod 404 is fixedly connected to the inner wall of the conical rotating barrel 40. When the third drive motor 401 drives the first rotating shaft 403 to rotate, the first rotating shaft 403 drives the conical rotating barrel 40 to rotate through the connecting rods 404.

[0020] Furthermore, such as Figure 1 As shown, the outer tube 101 includes a rear tube 1011 fixedly connected to the inner tube 102 and a front tube 1012 coaxially arranged with the rear tube 1011. The annular space 103 is formed between the rear tube 1011 and the inner tube 102. The mud inlet hole 1013 is provided on the side wall of the front tube 1012. The large end of the conical rotating barrel 40 is sealed and rotatably connected to the inner wall of the second end of the front tube 1012. The first end of the rear tube 1011 is detachably connected to the second end of the front tube 1012. The third drive motor 401 is fixedly connected to the first end of the front tube 1012.

[0021] like Figure 1 , Figure 2As shown, the middle section of the inner tube 102 is configured as a square cavity 104 that cooperates with the crushing roller assembly. The crushing roller assembly includes a main crushing roller 202 and an auxiliary crushing roller 203, both disposed within the square cavity 104. A drive shaft 2021 is coaxially fixedly connected to the main crushing roller 202, and a driven shaft 2031, parallel to the drive shaft 2021, is coaxially fixedly connected to the auxiliary crushing roller 203. Both the drive shaft 2021 and the driven shaft 2031 horizontally penetrate the rear tube 1011 and the square cavity 104 in a direction perpendicular to the axis of the inner tube 102. Both the drive shaft 2021 and the driven shaft 2031 are rotatably connected to the sidewall of the rear tube 1011 and the sidewall of the square cavity 104. The second drive... The drive motor 201 is fixedly connected to the outer wall of the rear tube 1011. The drive shaft 2021 is fixedly connected to the output shaft of the second drive motor 201. The drive gear 2022 is fixedly connected to the drive shaft 2021 located outside the rear tube 1011. The driven gear 2032, which meshes with the drive gear 2022, is fixedly connected to the driven shaft 2031 located outside the rear tube 1011. When the second drive motor 201 drives the main crushing roller 202 to rotate through the drive shaft 2021, the auxiliary crushing roller 203 rotates synchronously in the opposite direction to the main crushing roller 202 through the meshing of the drive gear 2022 and the driven gear 2032, crushing the mud blocks that enter the square cavity 104. After being crushed, the mud blocks enter the sewage pipe 30 through the mud discharge channel 1022.

[0022] The first drive motor 301 is disposed outside the closed end of the sewage pipe 30 and is fixedly connected to the sewage pipe 30. The output shaft of the first drive motor 301 extends into the sewage pipe 30 and is coaxially arranged with the sewage pipe 30. The spiral impeller includes a drive shaft 302 and a spiral blade 303 fixedly connected to the drive shaft 302. The drive shaft 302 is coaxially fixedly connected to the output shaft of the first drive motor 301.

[0023] The working principle of this solution is as follows:

[0024] The sludge pump is immersed in the sludge, which enters the front pipe 1012, the conical rotating drum 40, and the inner pipe 102 through the sludge inlet 1013. The first drive motor 301, the second drive motor 201, and the third drive motor 401 are activated. The third drive motor 401 drives the conical rotating drum 40 to rotate, and the spiral plate 405 on the conical rotating drum 40 rotates, squeezing the sludge towards the inner pipe 102. Under the rotation of the conical rotating drum 40 and the squeezing of the spiral plate 405, a large amount of water-rich, thin sludge enters the annular space 103 through the discharge hole 402, while a small amount of water-poor, lumpy sludge and other hard waste enters the square cavity 104 inside the inner pipe 102. The second drive motor 201 drives the main crushing roller 202 and the auxiliary crushing roller 203 to rotate in opposite directions. The lumpy sludge and other hard waste in the cavity 104 are crushed. Under the rotation and compression of the conical rotating drum 40, the crushed sludge and other hard waste enter the sewage pipe 30 through the sludge outlet channel 1022. At the same time, the thin sludge in the annular space 103 enters the sludge outlet channel 1022 through the sludge outlet hole 1021 and mixes with the crushed sludge and other hard waste. This increases the water content of the crushed sludge and other hard waste to reduce the overall viscosity of the sludge. The reduced viscosity of the sludge makes it less likely to adhere to the spiral blades 303 and the inner wall of the sewage pipe 30. The mixed sludge enters the sewage pipe 30. Driven by the first drive motor 301, the rotating spiral blades 303 transport the sludge towards the outlet of the sewage pipe 30 and discharge it out of the sewage pipe 30.

[0025] This solution has at least the following beneficial effects:

[0026] 1. This solution facilitates the separate crushing of mud lumps and hard waste in the sludge by separating the sludge into mud and water. The large amount of thin sludge after separation is transported through an annular space, and the thin sludge is not transported through the square cavity used as the crushing space. Compared with directly crushing the whole sludge without separating mud and water, this solution improves the sludge transportation efficiency.

[0027] 2. The crushing mechanism in this scheme only crushes the small amount of mud and other hard waste obtained after separation, which improves the crushing efficiency and thus improves the overall crushing efficiency of the sludge.

[0028] 3. The crushed mud and hard waste are then mixed with the separated thin mud to increase the water content of the crushed mud and other hard waste, thereby reducing the overall viscosity of the sludge. The reduced viscosity of the sludge makes it less likely to adhere to the spiral blades and the inner wall of the sewage pipe, preventing sludge from clogging the sewage pipe and improving the sludge transport efficiency of the sewage pipe, thus further improving the sewage treatment efficiency.

[0029] 4. The crushed sludge contains significantly fewer mud lumps and hard debris, effectively reducing the damage to the sludge pump caused by these materials.

[0030] The above are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics in the solutions is not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A sludge pump for sewage treatment, characterized in that: The system includes a sludge pretreatment device and a sludge conveying device. The sludge pretreatment device includes a sludge inlet pipe and a crushing mechanism disposed inside the sludge inlet pipe for crushing the sludge entering the sludge inlet pipe. The crushing mechanism includes a crushing roller assembly and a second drive motor for driving the crushing roller assembly to rotate. The sludge conveying device includes a discharge pipe, a spiral impeller disposed along the axis of the discharge pipe, and a first drive motor disposed outside the discharge pipe for driving the spiral impeller to rotate. The outlet end of the sludge inlet pipe is connected to the inner cavity of the discharge pipe so that the sludge crushed by the crushing mechanism enters the discharge pipe. The mud inlet pipe includes an outer pipe and an inner pipe located inside the outer pipe and coaxially arranged with the outer pipe. The length of the inner pipe is less than that of the outer pipe. An annular space is formed between the outer wall of the inner pipe and the inner wall of the outer pipe. The second end of the inner pipe is fixedly connected to the second end of the outer pipe. A mud outlet hole is provided on the side wall of the second end of the inner pipe to connect the annular space with the mud outlet channel of the inner pipe. The sludge pretreatment device further includes a sludge-water separation mechanism, which comprises a conical rotating drum and a third drive motor for rotating the conical rotating drum. The conical rotating drum is disposed inside the outer tube and coaxially arranged with the outer tube. The large end of the conical rotating drum is close to the first end of the outer tube, and the large end of the conical rotating drum is rotatably and sealingly connected to the inner wall of the outer tube. The small end of the conical rotating drum is rotatably connected to the first end of the inner tube, so that the inner cavity of the conical rotating drum is in sealed communication with the inner cavity of the inner tube. A plurality of discharge holes are evenly distributed on the side wall of the conical rotating drum, connecting the annular space with the inner cavity of the conical rotating drum. The third drive motor... The machine is installed on the outer wall of the first end of the outer tube. A first rotating shaft is fixedly connected to the output shaft of the third drive motor. The first rotating shaft is coaxially arranged with the conical rotating barrel. Multiple connecting rods are evenly distributed circumferentially on the first rotating shaft. One end of the connecting rod is fixedly connected to the first rotating shaft, and the other end of the connecting rod is fixedly connected to the inner wall of the conical rotating barrel. Multiple spiral plates are evenly distributed circumferentially on the inner wall of the conical rotating barrel. When the third drive motor drives the conical rotating barrel to rotate, the spiral plates squeeze the sludge towards the inner tube. A sludge inlet hole is provided on the side wall of the first end of the outer tube to allow the sludge to enter the inner cavity of the outer tube. The middle section of the inner tube is configured as a square cavity that cooperates with the crushing roller assembly. The crushing roller assembly includes a main crushing roller and an auxiliary crushing roller, both of which are disposed within the square cavity.

2. The sludge pump for wastewater treatment as described in claim 1, characterized in that: The outer tube includes a rear tube fixedly connected to the inner tube and a front tube coaxially arranged with the rear tube. The annular space is formed between the rear tube and the inner tube. The mud inlet is provided on the side wall of the front tube. The large end of the conical rotating barrel is sealed and rotatably connected to the inner wall of the second end of the front tube. The first end of the rear tube is detachably connected to the second end of the front tube. The third drive motor is fixedly connected to the first end of the front tube.

3. The sludge pump for wastewater treatment as described in claim 2, characterized in that: The main crushing roller is coaxially fixedly connected to the drive shaft, and the auxiliary crushing roller is coaxially fixedly connected to the driven shaft. Both the drive shaft and the driven shaft horizontally pass through the rear tube and the square cavity. The second drive motor is fixedly connected to the outer wall of the rear tube. The drive shaft is fixedly connected to the output shaft of the second drive motor. A drive gear is fixedly connected to the drive shaft located outside the rear tube, and a driven gear meshing with the drive gear is fixedly connected to the driven shaft located outside the rear tube.

4. The sludge pump for wastewater treatment as described in claim 3, characterized in that: The first drive motor is disposed outside the closed end of the sewage pipe and is fixedly connected to the sewage pipe. The output shaft of the first drive motor extends into the sewage pipe and is coaxially arranged with the sewage pipe. The spiral impeller includes a drive shaft and spiral blades fixedly connected to the drive shaft. The drive shaft is coaxially fixedly connected to the output shaft of the first drive motor.

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