Sand separation dehydrator

Abstract

A water tank is in a cone shape, a water inlet pipe is tangentially communicated with the upper end of the water tank, an annular water inlet gallery, a sand setting disc and a sawtooth-shaped water outlet weir are arranged at the upper end in the water tank, the annular water inlet gallery is high in outer periphery and low in inner periphery, and the sawtooth-shaped water outlet weir is arranged on the inner wall face of the inner periphery of the annular water inlet gallery. The sand setting disc is located on the outer side wall of the inner periphery of the annular water inlet gallery, and the upper surface of the sand setting disc is lower than the upper surface of the outer periphery of the annular water inlet gallery. The sand-water separator has the advantages that fine gravels are promoted to sink to the inner surface of the sand setting disc under the action of gravity and centrifugal force, and a high sand-water separation effect is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of sand-water separation, and in particular, relates to a sand separation and dehydration machine. Background Art

[0002] The existing spiral sand-water separator is suitable for the sand settling tank of the sewage treatment plant, and is a device used for sand-water mixture in sewage treatment. It generally includes a water tank and a spiral elevator, but in actual use, the larger sand particles fall due to their own weight and settle at the bottom of the spiral groove, but the fine sand takes a long time to settle. If there is not much time for the fine sand to settle during the dehydration process, some fine sand particles may even be directly discharged, resulting in incomplete sand-water separation, and secondary sand separation and dehydration may be required, or a longer time is required for sedimentation, resulting in low sand-water separation efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to solve the problem that fine sand particles are discharged along with liquid in the prior art, resulting in incomplete sand-water separation or low sand-water separation efficiency, thereby providing a sand separation and dehydrating machine.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A sand separation and dehydration machine comprises a water tank, a water inlet pipe for inputting fluid into the water tank, a sand delivery pipe connected to the bottom of the water tank, a shaftless sand lifting screw located in the sand delivery pipe, a speed reducer located at one end of the sand delivery pipe for driving the sand lifting screw to rotate, and a sand outlet located at the output end of the sand delivery pipe;

[0006] The water tank is conical in shape, the water inlet pipe is tangentially connected to the upper end of the water tank, and an annular water inlet gallery, a sand settling tray, and a serrated water outlet weir are provided at the upper end of the water tank. The outer periphery of the annular water inlet gallery is higher than the inner periphery. The serrated water outlet weir is arranged on the inner wall surface of the inner periphery of the annular water inlet gallery, the sand settling tray is located on the outer wall of the inner periphery of the annular water inlet gallery, and the upper surface of the sand settling tray is lower than the outer periphery upper surface of the annular water inlet gallery.

[0007] Furthermore, the sand settling tray is a conical structure that matches the shape of the water tank.

[0008] Furthermore, the invention also includes a backwashing structure provided at the bottom end of the sand conveying pipe.

[0009] Furthermore, the backwashing structure includes a plurality of nozzles connected to the lower end of the sand conveying pipe, and one end of the nozzles located outside the sand conveying pipe is connected to the backwashing pipe through a pipe connector.

[0010] Furthermore, the shaftless sand lifting spiral is changed to a shafted spiral. The traditional shaftless spirals are changed to shafted spirals, and the sand lifting accuracy can reach 75um.

[0011] Furthermore, a top cover is provided on the water tank to cover the annular water inlet gallery.

[0012] The beneficial effects of the utility model are:

[0013] The traditional water tank is changed into a cone, and an annular water inlet gallery, a sand settling tray and a serrated water outlet weir are set inside. When the mixed liquid enters the water tank tangentially at a relatively slow speed, the fluid forms a vortex in the settling tray due to inertia under the restriction of the settling tray pool wall. The water flow spirals downward in the area near the settling tray pool wall, and the water flow direction changes after encountering the conical settling tray. In the area near the center, the sand and gravel settle to the surface of the sand settling tray under the action of gravity and centrifugal force, which promotes the fine sand and gravel to settle to the inner surface of the sand settling tray under the action of gravity and centrifugal force, thereby achieving a higher sand-water separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 is a schematic diagram of the main cross-sectional structure of an embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of the main structure without a top cover of an embodiment of the present application;

[0018] The reference numerals in the figure are:

[0019] 1. Water tank, 2. Water inlet pipe, 3. Sand conveying pipe, 4. Shaftless sand lifting screw, 5. Reducer, 6. Sand outlet, 7. Annular water inlet gallery, 8. Sand settling tray, 9. Sawtooth water outlet weir, 10. Nozzle, 11. Flushing pipe, 12. Top cover. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the present utility model, unless otherwise specified, "multiple" means two or more.

[0022] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0023] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. Example

[0024] The present embodiment provides a sand separation and dewatering machine, comprising a water tank 1, a water inlet pipe 2 for inputting fluid into the water tank 1, a sand delivery pipe 3 connected to the bottom surface of the water tank 1, a shaftless sand lifting screw 4 located in the sand delivery pipe 3, a reducer 5 located at one end of the sand delivery pipe 3 to drive the sand lifting screw 4 to rotate, and a sand outlet 6 located at the output end of the sand delivery pipe 3. The shaftless sand lifting screw 4, the reducer 5 and other structures constitute a shaftless screw elevator;

[0025] The water tank 1 is conical in shape, and the water inlet pipe 2 is arranged at the upper end of the water tank 1 and tangent to the water tank 1. An annular water inlet gallery 7, a sand settling tray 8, and a serrated water outlet weir 9 are arranged at the upper end of the water tank 1. The outer periphery of the annular water inlet gallery 7 is high and the inner periphery is low. The serrated water outlet weir 9 is arranged on the inner wall of the inner periphery of the annular water inlet gallery 7. The sand settling tray 8 is located on the outer wall of the inner periphery of the annular water inlet gallery 7. The upper surface of the sand settling tray 8 is lower than the outer upper surface of the annular water inlet gallery 7, which is conducive to the water in the water tank 1 overflowing from the sand settling tray 8 to the annular water inlet gallery 7. The sand settling tray 8 is a conical structure, which matches the shape of the water tank 1. The water inlet pipe 2 is located in the interlayer between the sand settling tray 8 and the water tank 1, enters the water tank 1 from the water inlet pipe 2, and forms a vortex after colliding with the sand settling tray 8.

[0026] The bottom of the sand conveying pipe 3 is provided with a backwash structure. In actual use, some very fine sand will accumulate at the bottom of the sand-water separator over time, resulting in incomplete spiral sand lifting and the need to empty the box. Fine sand is easy to compact and difficult to empty. By adding a backwash structure and fluidizing it before emptying, emptying becomes very easy.

[0027] The specific structure is that the backwashing structure includes a plurality of nozzles 10 connected to the lower end of the sand conveying pipe 3, and one end of the nozzles 10 located outside the sand conveying pipe 3 is connected to a backwashing pipe 11 through a pipeline connector.

[0028] The shaftless sand lifting spiral 4 is a shafted spiral. The traditional ones are shaftless spirals. When it is changed to a shafted spiral, the sand lifting accuracy can reach 75um.

[0029] A top cover 12 is provided on the water tank 1 to cover the annular water inlet gallery. The top cover 12 is hinged at both ends to be opened, and is fixed on the water tank 1 in the middle.

[0030] The concentrated sand and water mixture from the sand washer enters the water tank tangentially through the water inlet pipe at a relatively slow speed. In the sand cone-type sedimentation plate, the fluid forms a vortex under the restriction of the sedimentation plate pool wall due to inertia; the water flow in the area close to the sedimentation plate pool wall spirals downward, and the water flow direction changes after encountering the conical sedimentation plate. In the area close to the center, the sand and gravel settle to the surface of the sand sedimentation plate under the action of gravity and centrifugal force; at the same time, under the sweeping action of the vortex, the sand particles settled on the surface of the sedimentation plate will quickly gather in the central hole of the sedimentation plate, and finally enter the sand conveying cylinder with an axial spiral. The dehydrated sand and gravel are loaded into the collection vehicle from the discharge port through the screw elevator, and the treated sewage flows out from the sawtooth outlet weir.

[0031] Based on the above ideal embodiments of this application, the relevant staff can make various changes and modifications without departing from the technical concept of this application through the above description. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A sand separation and dehydration machine, comprising a water tank, a water inlet pipe for inputting fluid into the water tank, a sand delivery pipe connected to the bottom of the water tank, a shaftless sand lifting screw located in the sand delivery pipe, a reducer located at one end of the sand delivery pipe to drive the sand lifting screw to rotate, and a sand outlet located at the output end of the sand delivery pipe, characterized in that: The water tank is conical, and the water inlet pipe is tangent to the water tank; an annular water inlet gallery, a sand settling tray, and a serrated water outlet weir are provided at the upper inner end of the water tank; the annular water inlet gallery is higher on the outer periphery and lower on the inner periphery; the serrated water outlet weir is arranged on the inner wall surface of the inner periphery of the annular water inlet gallery; the sand settling tray is located on the outer wall of the inner periphery of the annular water inlet gallery; and the upper surface of the sand settling tray is lower than the upper surface of the outer periphery of the annular water inlet gallery.

2. A sand separation and dewatering machine according to claim 1, characterized in that: The sand settling tray is a conical structure, which matches the shape of the water tank.

3. A sand separation and dewatering machine according to claim 1, characterized in that: The utility model also comprises a backwashing structure arranged at the bottom end of the sand conveying pipe.

4. A sand separation and dewatering machine according to claim 3, characterized in that: The backwashing structure comprises a plurality of nozzles connected to the lower end of the sand conveying pipe, and one end of the nozzles located outside the sand conveying pipe is connected to the backwashing pipe through a pipeline connector.

5. A sand separation and dewatering machine according to any one of claims 1 to 4, characterized in that: The shaftless sand lifting screw is a shafted screw.

6. A sand separation and dewatering machine according to claim 5, characterized in that: A top cover for shielding the annular water inlet gallery is arranged on the water tank.

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