Sludge stabilizing device
By designing a compact sludge stabilization device and utilizing flocculant mixing and cyclone separation technology, the problem of high water content in sludge on floating hulls was solved, achieving efficient mud-water separation and sludge sedimentation, which is suitable for river dredging equipment.
Patent Information
- Application Number
- CN202520117687.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-18
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-18
AI Technical Summary
In the existing technology, the sludge has a high water content after preliminary treatment on the floating hull, which affects the efficiency of subsequent dewatering treatment. Therefore, a compact sludge stabilization device with high sedimentation efficiency is needed.
A sludge stabilization device was designed, comprising a sedimentation chamber, a flocculant dosing system, an inlet pipe, and a propeller. The sedimentation chamber is equipped with a mixing channel, a separation channel, and a sludge channel. Sludge sedimentation is achieved through flocculant mixing and cyclone separation. The flow rate and flocculant dosage are adjusted by the propeller to improve the sludge-water separation effect.
It achieves efficient mud-water separation and sludge sedimentation within a limited space, improving the sedimentation efficiency of sludge treatment. It is suitable for use on the hull of river dredging equipment, and the sedimentation device of the sludge stabilization unit has a compact structure and good separation effect.
Smart Images
Figure CN223766248U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of water treatment, and more specifically, to a sludge stabilization device. Background Technology
[0002] River dredging equipment uses underwater devices to pump riverbed sediment onto a floating hull. The sludge undergoes preliminary treatment on the floating hull before being transported to other equipment on the shore for dewatering and drying. This ensures continuous operation of the underwater equipment and improves sludge treatment efficiency. However, if the sludge still has a high moisture content after preliminary treatment on the floating hull, it will affect subsequent dewatering. Therefore, a compact sludge stabilization device with higher sedimentation efficiency is needed. Utility Model Content
[0003] To address at least one of the aforementioned technical problems, according to one aspect of this disclosure, a sludge stabilization device is provided, comprising a sedimentation chamber, a flocculant dosing system, an inlet pipe, and a propeller. The sedimentation chamber includes a mixing channel, a separation channel, a sludge channel, and a clear water channel. The inlet of the sedimentation chamber is connected to the mixing channel, which is located on the outermost ring within the sedimentation chamber. The separation channel is located inside the mixing channel and is separated by a longitudinal partition. The top of the partition is fixed to the top of the sedimentation chamber, and the bottom of the partition is spaced a certain distance from the bottom of the sedimentation chamber. The sludge channel is located at the bottom of the sedimentation chamber, and the clear water channel is located at the center of the separation channel and has an inlet at the top. The flocculant dosing system includes a metering pump, a valve, and a dosing pipe connected to the metering pump and the valve. The inlet pipe transports a sludge-water mixture into the sedimentation chamber, with one end connected to the dosing pipe and the other end connected to the inlet of the sedimentation chamber. A propeller is located downstream of the inlet pipe, within the mixing channel of the sedimentation chamber. This sludge stabilization device can be installed in river dredging equipment, such as on a floating hull, to settle the pumped sludge. The structure is compact and offers high sedimentation efficiency.
[0004] Optionally, the lower width of the mixing channel is greater than the upper width.
[0005] Optionally, the upper part of the sidewall of the sedimentation chamber is vertical and the lower part is inclined outward, the upper part of the partition is vertical and the lower part is inclined outward, and the distance between the lower part of the sidewall of the sedimentation chamber and the lower part of the partition gradually increases from top to bottom.
[0006] The lower part of the mixing channel is wider than the upper part, which allows the mud and water to flow through the mixing channel and slow down the flow rate when entering the separation channel, preventing the water flow from affecting the bottom sludge channel and facilitating mud-water separation. Setting the side walls of the sedimentation chamber and the upper part of the baffle side walls as vertical structures is beneficial for creating swirling flow under the action of the propeller.
[0007] Optionally, the lower part of the sidewall of the sedimentation chamber has an inclination angle of 18° to 25°, and the lower part of the baffle has an inclination angle of 10° to 15°. If the inclination angle is too small, the slowing effect on the water flow will be relatively small; if the inclination angle is too large, it will increase the volume of the sedimentation chamber and may cause sludge accumulation, affecting the sedimentation efficiency.
[0008] Optionally, the mixing channel of the precipitation chamber includes an infrared camera.
[0009] Optionally, the sludge channel may include a collection hopper and a sludge discharge pipe connected to the collection hopper. The bottom of the sedimentation chamber is funnel-shaped, which facilitates the collection and discharge of sludge.
[0010] Optionally, the clear water channel includes an overflow weir at the top and an outlet pipe connected to the overflow weir.
[0011] Optionally, the inlet pipe is tangentially positioned at the inlet of the sedimentation chamber. This orientation facilitates the formation of vortices.
[0012] Optionally, the flocculant dosing system includes a turbidity detector located upstream of the inlet pipe.
[0013] The sludge stabilization device of this disclosure can achieve good mud-water separation and sludge sedimentation effects within a limited space.
[0014] Implementing any apparatus of this disclosure does not necessarily require achieving all of the advantages described above simultaneously. Other features and advantages of this disclosure will be set forth in the following description and will be apparent in part from the description and embodiments, or may be learned by practicing this disclosure. The objects and advantages of embodiments of this disclosure may be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of this disclosure, and are not intended to limit this disclosure.
[0016] Figure 1 This is a schematic diagram of the structure of a sludge stabilization device according to an embodiment of the present disclosure;
[0017] Figure 2 yes Figure 1 The diagram shows the sludge-water separation process of the sludge stabilization device. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Various different embodiments can be combined with each other to constitute other embodiments not shown in the following description. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0019] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes.
[0020] Figure 1 A sludge stabilization device according to an embodiment of the present disclosure is shown. It can be used as a standalone device to directly receive a sludge-water mixture pumped from an underwater device, or it can be connected to other sludge-water sedimentation or separation devices for sludge sedimentation treatment. The sludge stabilization device can be mounted on the hull of a river dredging vessel. The sludge outlet of the sludge stabilization device can be connected to a sludge dewatering device. The sludge stabilization device includes a sedimentation chamber 1, an inlet pipe 2, a flocculant dosing system 3, and a propeller 4.
[0021] The sedimentation chamber 1 includes a mixing channel 11, a separation channel 12, a sludge channel 13, and a clear water channel 14. An infrared camera 16 can also be installed in the mixing channel 11 of the sedimentation chamber 1 to sense the floc formation. The sedimentation chamber 1 is divided by longitudinal partitions 15. The mixing channel 11 is located on the outermost ring of the sedimentation chamber 1, between the outer side of the partition 15 and the inner wall of the sedimentation chamber 1. The sludge-water mixture and flocculant are thoroughly mixed in the mixing channel 11, promoting sludge sedimentation and sludge-water separation. The separation channel 12 is located inside the partition 15, between the clear water channel 14 and the mixing channel 11, increasing the residence time of the sludge-water mixture in the sedimentation chamber, which is beneficial for sludge-water separation. The sludge channel 13 is located at the bottom of the sedimentation chamber, essentially below the separation channel 12, for discharging sludge. The clear water channel 14 is located at the center of the separation channel 12 and is a basically vertical channel.
[0022] The settling chamber 1 is approximately axially symmetrical and can be shaped with a smaller top and a larger bottom, forming a funnel shape at the bottom to facilitate the downward discharge of settled sludge. A baffle 15 extends downward from the top of the settling chamber 1, with its bottom spaced from the bottom of the settling chamber to allow sludge-water flow through the gap. Optionally, the upper part of the sidewall of the settling chamber forms a vertical channel, while the lower part slopes outward from top to bottom. The upper part of the baffle 15 can be a vertical channel, and the lower part can be outwardly inclined. Optionally, both the lower part of the sidewall of the settling chamber and the lower part of the baffle 15 slope outward, and the distance between them gradually increases from top to bottom. Optionally, the inclination angle (the angle between the lower part of the sidewall of the settling chamber and the vertical direction in cross-section) can be between 18° and 25°. The inclination angle of the lower part of the baffle 15 can be between 10° and 15°. This arrangement makes the upper part of the mixing channel 11 a vertical channel, and the lower part a channel with a gradually increasing flow area. When the mud-water mixture enters the upper vertical channel tangentially, the vertical channel facilitates the formation of a swirling flow, thus promoting uniform mixing. Simultaneously, heavier particles fall along the sidewalls under centrifugal force. The gradually increasing flow area at the bottom further facilitates the falling of heavier particles while slowing the water flow velocity. This structure ensures separation speed while minimizing water flow interference in the sludge channel 13. The reduced water flow velocity in the separation channel 12 increases the residence time of the mud-water mixture within it, thereby improving the sludge-water separation effect.
[0023] The sludge channel 13 includes a collection hopper 131, and a sludge discharge pipe 132 is provided at the bottom of the collection hopper 131. The end of the sludge discharge pipe 132 discharges sludge into the subsequent sludge dewatering device through a sludge discharge pump.
[0024] The clear water channel 14 may include an overflow weir 141 around the top, which facilitates the even and dispersed flow of water into the clear water channel 14. A water outlet pipe 142 is provided at the rear end of the overflow weir 141.
[0025] The inlet pipe 2 is preferably tangentially positioned at its upper end to enter the sedimentation chamber 1, which facilitates the formation of a swirling flow of mud and water along the edge of the sedimentation chamber 1, resulting in more thorough and uniform mixing. A propeller 4 is installed at one end of the inlet pipe 2. Optionally, the propeller 4's thrust direction is the same as the water inlet direction of the inlet pipe 2. This configuration allows for adjustment of the water inlet flow rate of the inlet pipe 2. The propeller 4's thrust can be adjusted by regulating its frequency. An infrared camera 16 detects the floc formation within the mixing channel 11 and can adjust the propeller 4's thrust based on the floc formation status.
[0026] The flocculant dosing system 3 may include a metering pump 31, a valve 32, and a dosing pipeline 33, which is installed upstream of the inlet of the sedimentation chamber to add flocculant into the inlet pipe 2. To detect the turbidity of the mud-water mixture in the inlet pipe 2, a turbidity detector 34 can be installed upstream of the connection between the inlet pipe 2 and the dosing pipeline to determine the flocculant flow rate based on the turbidity of the mud-water, thereby achieving optimal mud-water separation. The flocculant flow rate and the thrust of the propeller can be determined based on mud-water turbidity parameters, floc formation parameters, etc.
[0027] Figure 2 A schematic diagram of the sludge-water separation process in a sludge stabilization device is shown. In the diagram, ① indicates the flow direction of the sludge-water mixture, ② indicates the flow direction of the sludge, and ③ indicates the flow direction of the clean water. First, the sludge-water mixture enters the settling chamber tangentially from the inlet pipe 2, forming a swirling flow within the mixing channel 11, which helps the sludge and flocculant to mix thoroughly. At this point, the heavier substances in the sludge-water flow downwards along the sidewall of the mixing channel 11 (the sidewall of the settling chamber and the baffle 15) and enter the sludge channel 13. The remaining sludge-water mixture flows downwards along the lower part of the baffle 15 towards the separation channel 12. Because the lower width of the mixing channel 11 and the separation channel 12 is greater than the upper width, the flow area of the sludge-water mixture increases in the lower part of the channel, and the flow velocity slows down, reducing the interference of the water flow on the sludge in the sludge channel 13. With the increase of flocculation time and the relatively independent setting of the separation channel 12, the sludge-water is further separated during its flow into the separation channel. In the separation channel 12, the water flows upwards, and the sludge settles downwards; this operating mode further enhances sludge sedimentation. The separated clean water flows into the clean water channel 14 from the overflow weir 141 at the top, while the sludge flows downward into the sludge channel 13. This process achieves sludge sedimentation and separation from the water flow. The structure is relatively compact, has high separation efficiency, and is suitable for installation in spaces with limited volume.
[0028] The above description is merely an exemplary embodiment of this disclosure and is not intended to limit the scope of protection of this disclosure, which is determined by the appended claims.
Claims
1. A sludge stabilizing apparatus characterized by The application relates to a river dredging device, which comprises: a sedimentation chamber, which comprises a mixing channel, a separation channel, a sludge channel and a clear water channel, wherein the inlet of the sedimentation chamber is communicated with the mixing channel, the mixing channel is arranged at the outermost position in the sedimentation chamber, the separation channel is arranged inside the mixing channel, a longitudinal partition plate is arranged between the mixing channel and the separation channel, the top of the partition plate is fixed to the top of the sedimentation chamber, the bottom of the partition plate is spaced apart from the bottom of the sedimentation chamber by a certain distance, the sludge channel is arranged at the bottom of the sedimentation chamber, and the clear water channel is arranged at the central position of the separation channel and is provided with an inlet at the top; a flocculant adding system, which comprises a metering pump, a valve and an adding pipeline connected with the metering pump and the valve; a water inlet pipeline, which conveys a sludge-water mixture into the sedimentation chamber, one end of the water inlet pipeline is connected with the adding pipeline, and the other end is arranged at the inlet of the sedimentation chamber; and a propeller, which is arranged at the downstream of the water inlet pipeline and is located in the mixing channel of the sedimentation chamber. The width of the lower part of the mixing channel is larger than that of the upper part.
2. The sludge stabilizing apparatus as claimed in claim 1, wherein The upper part of the side wall of the sedimentation chamber is vertical, and the lower part is outwardly inclined; the upper part of the partition plate is vertical, and the lower part is outwardly inclined; and the distance between the lower part of the side wall of the sedimentation chamber and the lower part of the partition plate gradually increases from top to bottom.
3. The sludge stabilizing apparatus as claimed in claim 1 or 2, characterized by The inclination angle of the lower part of the side wall of the sedimentation chamber is 18-25 degrees, and the inclination angle of the lower part of the partition plate is 10-15 degrees.
4. The sludge stabilizing apparatus as claimed in claim 3, wherein The mixing channel of the sedimentation chamber comprises an infrared camera.
5. The sludge stabilizing apparatus as claimed in claim 1, wherein The sludge channel comprises a collecting hopper and a sludge discharge pipeline connected with the collecting hopper.
6. The sludge stabilizing apparatus as claimed in claim 1, wherein The clear water channel comprises an overflow weir arranged at the top and a water outlet pipeline connected with the overflow weir.
7. The sludge stabilizing apparatus as claimed in claim 1, wherein The water inlet pipeline is arranged at the inlet of the sedimentation chamber in a tangential direction.
8. The sludge stabilizing apparatus as claimed in claim 1, wherein The flocculant adding system comprises a turbidity detector arranged upstream of the position where the water inlet pipeline is connected with the adding pipeline.
9. The sludge stabilizing apparatus as claimed in claim 1, wherein The sludge stabilizing device is arranged on the ship body in the river dredging device.
10. The sludge stabilizing apparatus as claimed in claim 1, wherein