Efficient sand separation device capable of preventing gravel from hardening

Abstract

The efficient sand separating device capable of preventing the gravel from hardening comprises a sand-water separator and a spiral separator, the spiral separator is obliquely arranged at the tail end of the sand-water separator, the input end of the spiral separator is communicated with a sand outlet of the sand-water separator, sand-water mixed liquid is guided into the top of the sand-water separator through a water inlet flow guide volute, and the spiral separator is communicated with the sand outlet of the sand-water separator. A stirring rod is arranged in the sand-water separator, and a spiral stirring belt is arranged at the bottom of the stirring rod. According to the utility model, the backwashing fluidization ring is additionally arranged at the bottom of the sand-water separator close to the sand discharge port, and high-pressure water is jetted through the backwashing fluidization ring to fluidize and dilute deposited gravels, so that the gravels are prevented from being hardened; the stirring plates and the stirring belts on the stirring rods are combined, rotational flow can be formed in the sand-water separator through rotation of the stirring rods, friction between gravels is increased, organic matter on the gravels falls off, the organic matter can be in a suspended state through regular stirring, the concentration of the organic matter is reduced, and the situation that sand is not prone to being produced due to too high concentration of the organic matter is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sand washing and sand separating machines, and more specifically, to a high-efficiency sand separating device for preventing sand and gravel from compacting. Background Art

[0002] In sewage treatment plants, sand-water separators are primarily used to thoroughly separate the sand and water mixture discharged from the grit chamber. They typically consist of a shaftless spiral, lining strips, a U-shaped trough, a water tank, a guide plate, an outlet weir, and a drive device. The sand-water mixture enters the sand-water separator's collection tank. After gravity sedimentation, heavier particles (such as sand) in the mixture settle at the bottom of the spiral trough. Driven by the spiral, the sand and other materials are lifted along the inclined U-shaped trough bottom. After leaving the liquid surface, they continue to move upward. Water flows back into the water tank through the gaps in the spiral trough, and the sand is transported to the discharge port and falls into the sand collection equipment. The supernatant in the water tank is discharged through the outlet (overflow port), thus achieving sand-water separation. The sand-water separator can also serve as an auxiliary facility for sand washing and dewatering, thereby meeting the disposal requirements required for sand transportation to a disposal site.

[0003] The operation of the sand-water separator is generally coordinated with the agitator, blower, and other equipment of the cyclone grit chamber. When the cyclone grit chamber is in operation, the sand-water mixture is washed and pressure-fed by the supporting blower to the sand-water separator, where it is separated. When the cyclone grit chamber stops pressurizing the sand-water mixture, the sand-water separator needs to continue operating. After the sand-water separation process is basically completed, it can be stopped after a few minutes. The selection of the sand-water separator should be determined based on the sedimentation rate of the settling particles, the feed flow rate, and the sand raking capacity. A gentler slope can remove finer sand particles. The transverse slope of the sand-water separator is generally 15° to 30°. In addition to the slope, the appropriate chain plate end speed and tooth pitch, whether the upper part of the U-shaped groove is vertical, whether the coaxiality and circularity of the shaftless spiral are good, whether the pitch and spiral inclination are appropriate, and whether the installation angle is within the appropriate range will all affect the sedimentation of particles.

[0004] A hydrocyclone can be installed at the front end of the sand-water separator, primarily to concentrate the sand through centrifugal action. The size of the hydrocyclone should be determined based on the circulating feed flow rate and the mortar solids concentration. It performs best when the feed solids concentration is less than 1%. The centrifugal action generated by the hydrocyclone can increase the mortar solids content to 5% to 15%.

[0005] However, in actual use, it is found that the above-mentioned sand-water separation device still has the following deficiencies:

[0006] 1. The gravel at the bottom of the sand-water separator is compacted and cannot be discharged smoothly, resulting in the need to empty the equipment and manually discharge the sand. This results in a large maintenance workload, a low degree of operation automation, and a high failure rate.

[0007] 2. The sand and gravel separated by traditional sand-water separators have a high organic matter content and a high water content, which increases the difficulty of subsequent sand and gravel processing and increases the cost of sand and gravel processing.

[0008] 3. The uneven sand-water mixture entering the sand-water separator causes short-circuiting inside the sand separator, a short residence time, many dead zones of sand and gravel, and easy formation of sand and gravel compaction, making it impossible to discharge sand.

[0009] 4. During the use of the sand-water separator, the concentration of organic matter continues to increase, causing the viscosity of the mixed liquid to increase, resulting in the sand and gravel being unable to settle to the bottom of the spiral, and the spiral being unable to remove the sand and gravel normally.

[0010] 5. The sand discharge pipeline is often blocked. During the clearing process, it was found that the blockages in the sand discharge pipeline are mainly located at the elbows and valves. The main blockages are wooden strips, plastic bags, etc., which increases the workload of operation and maintenance.

[0011] Therefore, it is necessary to propose an efficient sand separation device to prevent gravel from compacting to solve the above problems. Utility Model Content

[0012] The utility model provides a high-efficiency sand separation device for preventing gravel from compacting, so as to solve the problem that the existing sand separation device has a short mixing time, resulting in more gravel dead zones and easy compaction.

[0013] According to one aspect of the utility model, a high-efficiency sand separation device for preventing sand and gravel from compacting is provided, comprising a sand-water separator and a spiral separator, wherein the spiral separator is arranged at an angle at the end of the sand-water separator, the input end of the spiral separator is connected to the sand outlet of the sand-water separator, the top of the sand-water separator introduces a sand-water mixture through an inlet guide volute, a stirring rod is installed in the sand-water separator, a spiral stirring belt is provided at the bottom of the stirring rod, and a plurality of stirring plates are spaced apart at one end of the stirring rod close to the inlet guide volute, a backwash fluidizing ring of an external water pump is provided at the bottom of the sand-water separator, and a high-pressure nozzle is provided on the backwash fluidizing ring.

[0014] Preferably, based on the above solution, the stirring plate is arc-shaped and has guide holes on its surface.

[0015] Preferably, based on the above solution, the head of the stirring rod passes through the water inlet guide volute upward and is connected to a stirring motor.

[0016] Preferably, based on the above scheme, the water inlet guide vortex casing includes a guide shell and an output portion with a trumpet-shaped end, the output portion is connected to the guide shell, and the output portion is located in the sand-water separator, and an inlet pipe is tangentially connected to the guide shell.

[0017] Preferably, based on the above scheme, a water outlet weir plate is further installed in the sand-water separator, and the water outlet weir plate is arranged at the upper end of the output part and forms a water outlet cavity with the top plate of the sand-water separator, and the water outlet cavity is connected to a water outlet pipe.

[0018] Preferably, based on the above scheme, the sand-water separator is conical, the sand discharge port is arranged at the bottom of the sand-water separator, and an organic matter vent pipe is installed at 1 / 2-1 / 3 of the distance from the sand discharge port of the sand-water separator, and an electromagnetic valve is installed on the organic matter vent pipe.

[0019] The utility model relates to an efficient sand separation device for preventing sand and gravel from compacting. A backwash fluidizing ring is added at the bottom of the sand and water separator near the sand discharge port. High-pressure water is sprayed through the backwash fluidizing ring to fluidize and dilute the deposited sand and gravel, thereby preventing the sand and gravel from compacting. The device is combined with a stirring plate and a stirring belt on a stirring rod. By rotating, a vortex can be formed in the sand and water separator, thereby increasing the friction between the sand and gravel, cleaning the sand and gravel, and causing organic matter on the sand and gravel to fall off. Regular stirring can keep the organic matter in a suspended state, thereby reducing the concentration of the organic matter and preventing the sand from being difficult to discharge due to an excessively high organic concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 This is a schematic structural diagram of a high-efficiency sand separation device for preventing sand and gravel from compacting according to the present invention;

[0022] Figure 2 This is a cross-sectional view of a high-efficiency sand separation device for preventing sand and gravel from compacting according to the present invention;

[0023] Description of Figure Numbers:

[0024] Sand-water separator 1, stirring rod 11, stirring belt 12, stirring plate 13, guide hole 14, backwash fluidizing ring 15, stirring motor 16, water outlet weir plate 17, water outlet cavity 18, water outlet pipe 19, organic matter vent pipe 20;

[0025] Inlet guide volute 3, guide shell 31, output part 32, inlet pipe 33;

[0026] Spiral separator 4. DETAILED DESCRIPTION

[0027] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] It will be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0029] To simplify the drawings, only the parts relevant to the present invention are schematically shown in each figure. They do not represent the actual structure of the product. In addition, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically depicted or labeled. In this document, "one" not only means "only one" but also "more than one."

[0030] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0031] In the embodiments shown in the accompanying drawings, directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of various components of the present invention are not absolute but relative. These descriptions are applicable when these components are in the positions shown in the accompanying drawings. If the descriptions of the positions of these components are changed, these directional indications will also change accordingly.

[0032] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0034] See also Figure 1 , and combined with Figure 2As shown, the utility model is an efficient sand separation device for preventing sand and gravel from compacting, comprising a sand-water separator 1 and a spiral separator 4. The spiral separator 4 is arranged at an angle at the end of the sand-water separator, and the input end of the spiral separator 4 is connected to the sand outlet of the sand-water separator. The top of the sand-water separator introduces the sand-water mixture through the water inlet guide volute 3. A stirring rod 11 is installed in the sand-water separator, and a spiral stirring belt 12 is provided at the bottom of the stirring rod 11, and a plurality of stirring plates 13 are spaced apart at one end of the stirring rod 11 near the water inlet guide volute 3. A backwash fluidizing ring 15 of an external water pump is provided at the bottom of the sand-water separator, and a high-pressure nozzle is provided on the backwash fluidizing ring 15.

[0035] The water inlet guide volute 3 includes a guide shell 31 and an output portion 32 with a trumpet-shaped end. The output portion 32 is connected to the guide shell 31 and is located in the sand-water separator. An inlet pipe 33 is tangentially connected to the guide shell 31.

[0036] During operation, the inlet pipe 33 is used to tangentially connect the guide shell 31, and the sand and water mixture to be treated is tangentially introduced into the water inlet guide volute 3, so that the sand and gravel will not accumulate inside the feed volute. The trumpet-shaped output part 32 uses the centrifugal effect generated by the vortex to promote the effective aggregation of sand and gravel, and can promote the preliminary separation of sand and gravel and water. Combined with the special structure of the water inlet component, the Coanda effect of the feed is realized, achieving the preliminary concentration function of the sand and water mixture, promoting the separation of sand and gravel and water, and reducing the processing load of the sand-water separator 1.

[0037] After the sand-water mixture enters the conical sand-water separator 1, due to the vortex of the inlet water, the sand and gravel move in an umbrella shape to the pool walls on both sides under the action of centrifugal force and gravity, slide along the pool walls to the bottom of the cone bucket, and are separated out of the system through the shaftless spiral separator 4. The separated mixed liquid overflows to the outlet through the outlet weir.

[0038] In addition, a backwash fluidization ring 15 is installed at the bottom of the sand-water separator 1. Through regular flushing, the deposited sand and gravel are fluidized and diluted to prevent the sand and gravel from compacting. In conjunction with the rotation of the stirring rod 11 inside the cone bucket, when the sand and gravel are compacted under abnormal working conditions and the equipment is shut down, it can be automatically restarted to avoid shutdown for cleaning.

[0039] The stirring plate 13 of the present invention is arc-shaped and has a guide hole 14 on its surface. The head of the stirring rod 11 passes through the water inlet guide volute 3 and is upwardly connected to the stirring motor 16 .

[0040] Please continue reading Figure 1As shown, the sand-water separator of the present invention is further equipped with a water outlet weir plate 17. The water outlet weir plate 17 is arranged at the upper end of the output portion 32 and forms a water outlet chamber 18 with the top plate of the sand-water separator. The water outlet chamber 18 is connected to a water outlet pipe 19. Specifically, the stirring motor 16 drives the stirring rod 11 to rotate. Combined with the curved stirring plate 13 and the stirring belt 12 on the stirring rod 11, the centrifugal force is further increased to enhance the sand-water separation effect. It should be noted that the stirring rod 11 of the present invention has a controlled speed of 10-20 rpm.

[0041] Furthermore, in order to improve its anti-solidification effect, the fluidized loop nozzle of the utility model can be two-layered to achieve double-layer flushing, ensuring that the upper and lower layers of gravel in the sand hopper can be completely fluidized and the gravel will not be compacted.

[0042] like Figure 2 As shown, the sand-water separator of the present invention is conical in shape, the sand outlet is set at the bottom of the sand-water separator, and an organic matter drain pipe 20 is installed at a distance of 1 / 2-1 / 3 from the sand outlet of the sand-water separator. A solenoid valve is installed on the organic matter drain pipe 20. This can achieve the regular discharge of organic matter inside the sand-water separator 1. The discharged organic matter can be returned to the biochemical system as a carbon source, while reducing the organic matter concentration inside the sand-water mixer, avoiding the problem of the sand-water separator 1 not being able to discharge sand due to the increase in the viscosity of the mixed liquid caused by excessive organic matter concentration.

[0043] The utility model discloses an efficient sand separation device for preventing sand and gravel from compacting. A backwash fluidizing ring 15 is added at the bottom of a sand and water separator near a sand discharge port. High-pressure water is sprayed through the backwash fluidizing ring 15 to fluidize and dilute the deposited sand and gravel, thereby preventing the sand and gravel from compacting. The device is combined with a stirring plate 13 and a stirring belt 12 on a stirring rod 11. By rotating, a vortex can be formed in the sand and water separator, thereby increasing friction between the sand and gravel, cleaning the sand and gravel, and causing organic matter on the sand and gravel to fall off. Regular stirring can keep the organic matter in a suspended state, thereby reducing the concentration of the organic matter and preventing the sand from being difficult to discharge due to excessive organic concentration.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] 1. Compared with the traditional sand-water separator 1, it has a higher processing load, better sand and gravel properties, the organic matter content of the separated sand is less than 15%, and the water content is less than 30%.

[0046] 2. Solve the problem that the current sand-water separator 1 is easily blocked and needs maintenance.

[0047] 3. The separated sand and gravel have smaller particle size. The traditional sand-water separator 1 separates sand and gravel above 200um with a separation efficiency of 70%-80%. This device can separate sand and gravel of 106um with a separation efficiency of more than 85%.

[0048] 4. The interior is equipped with agitators and 15 backwash fluidized rings, which eliminates the problem of sand and gravel compaction and the problem of shutdown for flushing. The equipment can automatically restart under abnormal working conditions.

[0049] Finally, the method of this application is only a preferred embodiment and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this utility model should be included in the scope of protection of this utility model.

Claims

1. An efficient sand separation device for preventing gravel from compacting, characterized in that: It includes a sand-water separator and a spiral separator. The spiral separator is arranged at the end of the sand-water separator in an inclined shape. The input end of the spiral separator is connected to the sand outlet of the sand-water separator. The top of the sand-water separator introduces sand and water mixture through the water inlet guide volute. A stirring rod is installed in the sand-water separator. The bottom of the stirring rod is provided with a spiral stirring belt, and a plurality of stirring plates are arranged at intervals at one end of the stirring rod close to the water inlet guide volute. A backwash fluidizing ring of an external water pump is provided at the bottom of the sand-water separator, and a high-pressure nozzle is provided on the backwash fluidizing ring.

2. The high-efficiency sand separation device for preventing gravel from compacting as claimed in claim 1, characterized in that: The stirring plate is arc-shaped, and a guide hole is provided on the surface of the stirring plate.

3. The high-efficiency sand separation device for preventing gravel from compacting as claimed in claim 1, characterized in that: The head of the stirring rod passes through the water inlet guide volute and is upwardly connected to a stirring motor.

4. The high-efficiency sand separation device for preventing gravel from compacting as claimed in claim 1, characterized in that: The water inlet guide volute includes a guide shell and an output portion with a trumpet-shaped end. The output portion is communicated with the guide shell and is located in the sand-water separator. An inlet pipe is tangentially connected to the guide shell.

5. The high-efficiency sand separation device for preventing gravel from compacting as claimed in claim 4, characterized in that: A water outlet weir plate is also installed in the sand-water separator, and the water outlet weir plate is arranged at the upper end of the output part and forms a water outlet cavity with the top plate of the sand-water separator, and the water outlet cavity is connected to a water outlet pipe.

6. The high-efficiency sand separation device for preventing gravel from compacting as claimed in claim 4, characterized in that: The sand-water separator is conical, a sand discharge port is provided at the bottom of the sand-water separator, an organic matter discharge pipe is installed at 1 / 2-1 / 3 of the distance from the sand discharge port, and a solenoid valve is installed on the organic matter discharge pipe.

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