Tanning wastewater settling device

Abstract

The utility model discloses a tannery wastewater settling device which comprises a box body, the top of an inner cavity of the box body is rotatably connected with a rotating shaft, the top of the box body is fixedly connected with a motor, an output shaft of the motor is fixedly connected with the rotating shaft, the rotating shaft is provided with a plurality of stirring paddles, the bottom of the box body is communicated with a sludge outlet pipe, and the bottom of the sludge outlet pipe is connected with a sewage pump. Wastewater and a precipitant in the conveying cylinder are pushed by the spiral blade to be conveyed downwards, and the stirring effect of the stirring paddle is matched, so that the precipitant can be quickly diffused downwards, the contact time of the wastewater and the precipitant in the lower area is shortened, the settling efficiency is improved, the wastewater in the box body circularly flows in cooperation with the filter screen, and small floccules suspended in water are discharged out of the box body. And the floccules are directly separated from the clear water, so that the clear water is conveniently pumped out, and the floccules are suspended in a small amount of wastewater below the filter screen and are not easy to attach to the filter screen, so that the phenomenon of mesh blockage is avoided, the filter screen does not need to be repeatedly cleaned, and the settling efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of leather making wastewater treatment, in particular to a leather making wastewater settling device. Background Art

[0002] In the treatment of tanning wastewater, our company has filed patent application number 202122949517.3, disclosing a tanning wastewater sedimentation device, including a box, a filter plate, a drain pipe, a rotating shaft and a stirring paddle, etc. The wastewater in the box is stirred by the stirring paddle to fully mix the precipitant and the wastewater, which can improve the sedimentation reaction efficiency; the sludge is discharged by a sewage pump, and the sewage discharge efficiency is high.

[0003] After using this equipment for a long time, the following defects were found: First, after the precipitant is added to the wastewater, although the stirring paddle has a mixing effect, the precipitant diffuses slowly from the top of the wastewater to the bottom, resulting in the wastewater in the lower area requiring a long period of stirring before it can contact the precipitant for reaction, resulting in low sedimentation efficiency; secondly, after the precipitant reacts with the wastewater, smaller flocs are suspended in the water and are not easy to sink directly. The original solution of filtering with a filter will cause the flocs to accumulate on one side of the filter as the water is discharged, which can easily cause the mesh to be blocked. The filter also needs to be cleaned repeatedly, further resulting in low sedimentation efficiency.

[0004] Therefore, in order to improve the sedimentation efficiency, our company proposed a tanning wastewater sedimentation device after improvement. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a tanning wastewater sedimentation device, which pushes the wastewater and precipitant in the conveying cylinder downward by spiral blades, and cooperates with the stirring effect of the stirring paddle to quickly diffuse the precipitant downward, accelerate the contact time between the wastewater and the precipitant in the lower area, and improve the sedimentation efficiency. The filter screen is used to circulate the wastewater in the box, and the smaller flocs suspended in the water are directly separated from the clean water, which is convenient for extracting the clean water. The flocs are suspended in a small amount of wastewater below the filter screen and are not easy to adhere to the filter screen, thus avoiding the phenomenon of mesh clogging. There is no need to repeatedly clean the filter screen, which further improves the sedimentation efficiency.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The top of the inner cavity of the box body is rotatably connected with a rotating shaft, the top of the box body is fixedly connected with a motor, the output shaft of the motor is fixedly connected to the rotating shaft, and a plurality of stirring paddles are arranged on the rotating shaft. The bottom of the box body is connected with a mud discharge pipe, and the bottom of the mud discharge pipe is connected with a sewage pump, which is characterized in that: the top of the inner cavity of the box body is fixedly connected with a conveying cylinder, the rotating shaft passes through the conveying cylinder, the stirring paddle is located below the conveying cylinder, the upper part of the side wall of the conveying cylinder is provided with a through hole 1, the lower part of the side wall of the conveying cylinder is provided with a through hole 2, the rotating shaft is fixedly connected with a spiral blade adapted to the inner cavity of the conveying cylinder, the top of the box body is fixedly connected with an electric push rod, the telescopic end of the electric push rod is fixedly connected with a mounting plate, the bottom of the mounting plate is fixedly connected with a water pump, the water inlet of the water pump is connected with a suction pipe, and the suction pipe The bottom end of the water pipe is bent and extended into the box body, and the water suction pipe is slidably connected to the top of the box body. A filter is fixedly connected below the bent part of the water suction pipe, and the filter is in the shape of a ring. The outer side of the filter fits against the inner wall of the box body, and the inner side of the filter fits against the outer wall of the conveying cylinder. The side wall of the box body is connected to a liquid inlet pipe, and the wastewater and precipitant in the conveying cylinder are pushed downward by spiral blades. Combined with the stirring effect of the stirring paddle, the precipitant can be quickly diffused downward, and the contact time between the wastewater and the precipitant in the lower area can be accelerated, thereby improving the sedimentation efficiency. Combined with the filter, the wastewater in the box body is circulated, and smaller flocs suspended in the water are directly separated from the clean water, which is convenient for extracting the clean water. The flocs are suspended in a small amount of wastewater below the filter and are not easily attached to the filter, thereby avoiding the phenomenon of mesh clogging. There is no need to repeatedly clean the filter, which further improves the sedimentation efficiency.

[0008] Furthermore, a feed pipe is fixedly connected to the top of the box body, and the bottom end of the feed pipe extends into the conveying cylinder. The precipitant can be directly added into the conveying cylinder through the feed pipe, so that the spiral blade can convey and diffuse the precipitant downward.

[0009] Furthermore, a telescopic hose is connected to the water outlet of the water pump, and the telescopic hose makes it unnecessary for the container for collecting clean water to move with the water pump.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The spiral blade pushes the wastewater and precipitant in the conveying cylinder downward. With the stirring effect of the stirring paddle, the precipitant can be quickly diffused downward, the contact time between the wastewater and the precipitant in the lower area can be accelerated, and the sedimentation efficiency can be improved. With the filter, the wastewater in the box can be circulated, and the smaller flocs suspended in the water can be directly separated from the clean water, which is convenient for extracting the clean water. The flocs are suspended in a small amount of wastewater below the filter and are not easy to adhere to the filter, thus avoiding the phenomenon of mesh blockage. There is no need to repeatedly clean the filter, which further improves the sedimentation efficiency.

[0012] 2. The precipitant can be directly added into the delivery cylinder through the feed pipe, so that the spiral blade can transport and diffuse the precipitant downward. The telescopic hose makes it unnecessary for the container for collecting clean water to move with the water pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0015] In the figure: 1 box body, 2 rotating shaft, 3 motor, 4 stirring paddle, 5 mud outlet pipe, 6 sewage pump, 7 conveying cylinder, 8 through hole 1, 9 through hole 2, 10 spiral blade, 11 electric push rod, 12 mounting plate, 13 water pump, 14 water suction pipe, 15 filter screen, 16 liquid inlet pipe, 17 feed pipe, 18 telescopic hose. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention. Example

[0018] See attached Figure 1-2As shown, a tanning wastewater settling device comprises a box body 1, a rotating shaft 2 is rotatably connected to the top of the inner cavity of the box body 1, a motor 3 is fixedly connected to the top of the box body 1, an output shaft of the motor 3 is fixedly connected to the rotating shaft 2, a plurality of stirring paddles 4 are arranged on the rotating shaft 2, a mud outlet pipe 5 is connected to the bottom of the box body 1, a sewage pump 6 is connected to the bottom of the mud outlet pipe 5, a conveying cylinder 7 is fixedly connected to the top of the inner cavity of the box body 1, the rotating shaft 2 passes through the conveying cylinder 7, the stirring paddle 4 is located below the conveying cylinder 7, a through hole 1 8 is opened on the upper part of the side wall of the conveying cylinder 7, a through hole 2 9 is opened on the lower part of the side wall of the conveying cylinder 7, a through hole 1 is fixedly connected to the inner cavity of the conveying cylinder 7 on the rotating shaft 2, and a through hole 2 9 is opened on the lower part of the side wall of the conveying cylinder 7. The top of the box body 1 is fixedly connected with an electric push rod 11, the telescopic end of the electric push rod 11 is fixedly connected with a mounting plate 12, the bottom of the mounting plate 12 is fixedly connected with a water pump 13, the water inlet of the water pump 13 is connected with a water pumping pipe 14, the bottom end of the water pumping pipe 14 is bent and extends into the box body 1, the water pumping pipe 14 is slidably connected to the top of the box body 1, and a filter screen 15 is fixedly connected below the bent portion of the water pumping pipe 14. The shape of the filter screen 15 is annular, the outer side of the filter screen 15 is in contact with the inner wall of the box body 1, the inner side of the filter screen 15 is in contact with the outer wall of the conveying cylinder 7, and the side wall of the box body 1 is connected with a liquid inlet pipe 16.

[0019] A feed pipe 17 is fixedly connected to the top of the box body 1 , and the bottom end of the feed pipe 17 extends into the conveying cylinder 7 .

[0020] The water outlet of the water pump 13 is connected with a telescopic hose 18 .

[0021] Working principle: In the present utility model, before the wastewater is transported to the box 1 for treatment, the electric push rod 11 is started in advance to drive the mounting plate 12 to move upward, and the mounting plate 12 drives the water pump 13, the water pumping pipe 14 and the filter screen 15 to move upward synchronously until the filter screen 15 is located above the through hole 18 and the liquid inlet pipe 16, and the valve on the liquid inlet pipe 16 is opened to transport the wastewater from the liquid inlet pipe 16 to the box 1 until the water level submerges the through hole 18. At this time, the wastewater is located in the box 1 and the conveying tube 7 below the filter screen 15, and the precipitant is added from the feed pipe 17 to the conveying tube 7, and the motor 3 is started to drive the rotating shaft 2 to rotate. The rotating shaft 2 drives the spiral blade 10 and the stirring paddle 4 to rotate. The rotating spiral blade 10 transports the precipitant and the wastewater in the conveying cylinder 7 downward from the through hole 9 during the rotation and mixing, and flows into the wastewater in the area below the box body 1. The rotating stirring paddle 4 stirs the wastewater in the box body 1 to rotate and continue to mix the precipitant with the wastewater. At the same time, as the wastewater in the conveying cylinder 7 decreases, the wastewater in the box body 1 enters the conveying cylinder 7 from the through hole 8, and so on. The wastewater and the precipitant are mixed in a circulating flow until the mixing is completed. At this time, the reactant with a larger volume precipitates downward and falls into the box body. The bottom of the housing 1 forms a muddy state, and some smaller flocculent reactants are still suspended in the water. The electric push rod 11 is started to reset, and then the water pump 13, the water suction pipe 14 and the filter screen 15 move downward to reset. As the filter screen 15 moves downward, the flocculent reactants suspended in the housing 1 are pressed down by the filter screen 15, so that the clean water is located above the filter screen 15, and the flocculent is located below the filter screen 15. The flocculent contained in the water in the conveying cylinder 7 continues to be discharged from the conveying cylinder 7 through the through hole 2 9 as the spiral blade 10 continues to rotate. The water in the housing 1 circulates upward and enters the through hole 1 8, encountering the filter. The net 15 is filtered, and then the conveying cylinder 7 also begins to enter the clean water, until the filter screen 15 is reset to the bottom of the conveying cylinder 7 and is lower than the height of the through hole 29. At this time, the area above the filter screen 15 in the box body 1 and the conveying cylinder 7 are all clean water, and all the flocs are located in the small amount of waste water below the filter screen 15. Start the water pump 13 to transport the clean water from the suction pipe 14 through the telescopic hose 18 to the container for collecting clean water to complete the separation work. Repeat the above steps to continuously treat the wastewater. When the sludge settled below the box body 1 accumulates a lot, start the sewage pump 6 to discharge the sludge from the mud outlet pipe 5.

[0022] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0023] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tannery wastewater settling device, comprising a housing (1), the top of the inner cavity of the housing (1) being rotatably connected to a rotating shaft (2), the top of the housing (1) being fixedly connected to a motor (3), the output shaft of the motor (3) being fixedly connected to the rotating shaft (2), the rotating shaft (2) being provided with a plurality of stirring paddles (4), the bottom of the housing (1) being connected to a mud outlet pipe (5), the bottom of the mud outlet pipe (5) being connected to a sewage pump (6), characterized in that: A conveying cylinder (7) is fixedly connected to the top of the inner cavity of the housing (1), the rotating shaft (2) passes through the conveying cylinder (7), the stirring paddle (4) is located below the conveying cylinder (7), a through hole (8) is opened at the upper part of the side wall of the conveying cylinder (7), a through hole (9) is opened at the lower part of the side wall of the conveying cylinder (7), a spiral blade (10) adapted to the inner cavity of the conveying cylinder (7) is fixedly connected to the rotating shaft (2), an electric push rod (11) is fixedly connected to the top of the housing (1), a mounting plate (12) is fixedly connected to the telescopic end of the electric push rod (11), and the mounting plate (12) is fixedly connected to the telescopic end of the electric push rod (11). 2) is fixedly connected to the bottom of the casing (1), a water pump (13) is connected to the water inlet of the water pump (13), the bottom end of the water pump (14) is bent and extends into the casing (1), the water pump (14) is slidably connected to the top of the casing (1), a filter screen (15) is fixedly connected below the bent portion of the water pump (14), the filter screen (15) is annular in shape, the outer side of the filter screen (15) is in contact with the inner wall of the casing (1), the inner side of the filter screen (15) is in contact with the outer wall of the conveying cylinder (7), and the side wall of the casing (1) is connected to a liquid inlet pipe (16).

2. The tanning wastewater settling device according to claim 1, characterized in that: A feed pipe (17) is fixedly connected to the top of the box body (1), and the bottom end of the feed pipe (17) extends into the conveying cylinder (7).

3. The tanning wastewater settling device according to claim 1, characterized in that: The water outlet of the water pump (13) is connected to a telescopic hose (18).

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