Two-stage rotational flow concentration sand washing and separating device

Abstract

The invention discloses a two-stage rotational flow concentration sand washing and separating device which comprises a sand-water separating structure, first-stage rotational flow concentration sand washing devices and second-stage rotational flow concentration devices are arranged on the upper portion of the sand-water separating structure, the first-stage rotational flow concentration sand washing devices are located on the two sides of the second-stage rotational flow concentration device respectively and communicate with each other, and the second-stage rotational flow concentration sand washing devices communicate with the first-stage rotational flow concentration sand washing devices. The sand-water separation structure comprises a sand setting box body and a spiral sand separation device positioned in the sand setting box body; according to the first-stage rotational flow concentration sand washing device, a tangential water inlet mode is adopted, a rotational flow effect is generated through a rotational flow device, sedimentation and separation of solid particulate matter are accelerated, the separation precision is improved, after sand-water mixed liquid is subjected to two-stage concentration, the sand-water separation efficiency is high, the concentrated sand-water mixed liquid is subjected to backwashing, and the sand-water separation efficiency is improved. Organic matters wrapped on the surfaces of gravels are cleaned, inorganic gravels are separated from the organic matters, the discharged gravels are cleaner and can be used for recycling gravels resources, flushing water is arranged at the position where the equipment is easy to block, and flushing is carried out in time after the operation of the equipment is completed, so that blockage is prevented.

Description

Technical Field

[0001] The present invention relates to a sand - water separation device, and particularly to a two - stage cyclone concentration sand - washing and sand - separating device. Background Art

[0002] In the process of sewage treatment, a sand - water separator is used to separate the sediment and sand precipitated in the sedimentation unit. The separated sand is transported out for disposal, and the effluent after separation flows back to the collecting tank at the front end of the sewage treatment plant and enters the system again for treatment. Traditional sand - water separators (such as spiral type, cyclone type, etc.) are widely used in sewage treatment, but the following problems often exist in actual operation:

[0003] (1) Gravel relies on gravity for natural sedimentation. The sedimentation path is short, the efficiency is low, and the separation effect on gravel with a particle size less than 200 microns is poor, and it often flows out with the overflow effluent and enters the sewage treatment system again.

[0004] (2) The equipment has a large volume. Since sedimentation relies on gravity, a certain volume is required to ensure the residence time for sedimentation. Therefore, under the same efficiency, such equipment has a large volume and high cost.

[0005] (3) It is easy to be blocked. Sand particles, fibrous substances or grease adhere to the spiral blades or the inner wall of the separator, causing the equipment to be blocked and requiring frequent shutdown for cleaning. Summary of the Invention

[0006] The present invention provides a two - stage cyclone concentration sand - washing and sand - separating device to overcome the defects of poor gravel separation effect and easy blockage of the sand - water separation device in the prior art.

[0007] To solve the above - mentioned technical problems, the present invention provides the following technical solutions:

[0008] The present invention discloses a two - stage cyclone concentration sand - washing and sand - separating device, including a sand - water separation structure. An upper part of the sand - water separation structure is respectively provided with a first - stage cyclone concentration sand - washing device and a second - stage cyclone concentration device. The first - stage cyclone concentration sand - washing devices are respectively located on both sides of the second - stage cyclone concentration device and are communicated with each other. The sand - water separation structure includes a sand - settling box body and a spiral sand - separating device located inside it.

[0009] Furthermore, the first - stage cyclone concentration sand - washing device includes a water inlet chamber. The water inlet chamber touches the ground through a support frame. One side of it is tangentially connected with a water inlet A. An overflow chamber is arranged above it, and the two are communicated through a central overflow pipe. An overflow port A is arranged on one side of the overflow chamber, and an exhaust port A is arranged at its upper end. A sand - washing chamber is arranged below the water inlet chamber. The side wall of the sand - washing chamber is tangentially connected with a sand discharge port. An anti - washing water inlet is arranged on the upper part of its side wall, and a flushing water inlet is arranged at the bottom of the side wall of the sand - washing chamber and is 180° with the sand discharge port.

[0010] Furthermore, the secondary cyclone concentration device includes a concentration cylinder body. An exhaust port is provided at the top of the concentration cylinder body, and a water inlet B is tangentially connected to its side wall. An overflow port B is connected to the upper part of the side wall of the concentration cylinder body in a tangential form, and a water outlet is provided at the lower part of the concentration cylinder body.

[0011] Furthermore, the grit chamber body includes a grit chamber. A water inlet C is provided at the top of the grit chamber, and its cross-sectional area is gradually enlarged and matches the water inlet direction. A bend is provided to make it bend towards the grit deposition area of the grit chamber. An overflow port C is provided at the upper part of the side wall of the grit chamber. A diversion plate is provided between the water inlet and the overflow port C for separating the grit deposition area from the overflow water outlet area. A grit hopper is provided at the bottom of the grit chamber for storing the deposited sediment, and a bracket is used to fixedly support the grit chamber.

[0012] Furthermore, the spiral sand separation device includes a U-shaped groove. A shaftless spiral blade is provided in the U-shaped groove, and a motor and a drain port are respectively provided at both ends of its outside. The motor is used to control the rotation of the spiral blade, and a sand dropping port is provided at one end of the U-shaped groove close to the motor.

[0013] Furthermore, the water inlet chamber and the sand washing chamber are two relatively independent chambers, which are only connected through the annular water inlet A and do not affect the swirling state in the water inlet chamber during backwashing.

[0014] The beneficial effects achieved by the present invention are as follows:

[0015] (1) Improve the sand removal accuracy: The first-stage cyclone concentration sand washing device has pressure water inlet and adopts the tangential water inlet method. Through the swirling device, a swirling effect is generated to accelerate the sedimentation and separation of solid particulate matter, and it can separate gravel with a particle size ≥ 75μm. Compared with the traditional sand-water separator that separates gravel with a particle size ≥ 200μm, the separation accuracy is higher.

[0016] (2) Improve the grit sedimentation efficiency: After the sand-water mixture is concentrated in two stages, the volume of the mixture decreases and the solid content increases. Then, when it enters the grit chamber body, the residence time is long, the sedimentation efficiency is high, and the sand-water separation efficiency is high.

[0017] (3) The concentrated sand-water mixture is subjected to backwashing. Through the specific design of the washing path, the organic matter wrapped on the surface of the gravel is cleaned, the inorganic gravel is separated from the organic matter, and the discharged gravel is cleaner and can be used for the recovery of gravel resources.

[0018] (4) Flushing water is provided at the positions where the equipment is prone to blockage, and flushing is carried out in time after the equipment operation is completed to prevent blockage. Description of the Drawings

[0019] The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the drawings: Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structure of the primary cyclone concentration sand washing device of the present invention Figure 1 ; Figure 3 is a schematic structure of the primary cyclone concentration sand washing device of the present invention Figure 2 ; Figure 4 is a schematic structure of the secondary cyclone concentration device of the present invention Figure 1 ; Figure 5 is a schematic structure of the secondary cyclone concentration device of the present invention Figure 2 ; Figure 6 is a schematic structural diagram of the sand-water separation structure of the present invention.

[0026] In the figure: 1. Primary cyclone concentration sand washing device; 1-1. Water inlet A; 1-2. Overflow port A; 1-3. Sand discharge port; 1-4. Backwashing water inlet; 1-5. Flushing water inlet; 1-6. Water inlet chamber; 1-7. Sand washing chamber; 1-8. Overflow chamber; 1-9. Central overflow pipe; 1-10. Exhaust port A; 1-11. Support frame; 2. Secondary cyclone concentration device; 2-1. Concentration cylinder body; 2-2. Water inlet B; 2-3. Overflow port B; 2-4. Water outlet; 2-5. Exhaust port B; 3. Sand settling box body; 3-1. Water inlet C; 3-2. Overflow port C; 3-3. Sand settling box; 3-4. Sand settling hopper; 3-5. Drainage plate; 3-6. Support; 4. Spiral sand separation device; 4-1. Shaftless spiral blade; 4-2. U-shaped groove; 4-3. Motor; 4-4. Sand falling port; 4-5. Emptying port. Specific embodiments

[0027] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0028] Embodiment 1

[0029] As Figures 1 to 6 shown, a two-stage cyclone concentration sand washing and sand separation device includes a sand-water separation structure. The upper part of the sand-water separation structure is respectively provided with a primary cyclone concentration sand washing device 1 and a secondary cyclone concentration device 2. The primary cyclone concentration sand washing device 1 is located on both sides of the secondary cyclone concentration device 2 and is communicated with each other. The sand-water separation structure includes a sand settling box body 3 and a spiral sand separation device 4 located inside it.

[0030] The primary cyclone concentration sand washing device 1 includes a water inlet chamber 1-6. The water inlet chamber 1-6 touches the ground through a support frame 1-11. One side of it is tangentially connected to a water inlet A 1-1. An overflow chamber 1-8 is provided above it, and the two are connected through a central overflow pipe 1-9. One side of the overflow chamber 1-8 is provided with an overflow port A 1-2, and an exhaust port A 1-10 is provided at its upper end. A sand washing chamber 1-7 is provided below the water inlet chamber 1-6. The side wall of the sand washing chamber 1-7 is tangentially connected to a sand discharge port 1-3. An anti-washing water inlet 1-4 is provided at the upper part of its side wall. A flushing water inlet 1-5 is arranged at the bottom of the side wall of the sand washing chamber 1-7 and is 180° from the sand discharge port 1-3.

[0031] The secondary cyclone concentration device 2 includes a concentration cylinder body 2-1. An exhaust port 2-5 is provided at the top of the concentration cylinder body 2-1. One side of its side wall is tangentially connected to a water inlet B 2-2. An overflow port B 2-3 is connected to the upper part of the side wall of the concentration cylinder body 2-1 in a tangential form. A water outlet 2-4 is provided at the lower part of the concentration cylinder body 2-1.

[0032] The sand settling box body 3 includes a sand settling box 3-3. A water inlet C 3-1 is provided at the top of the sand settling box 3-3. Its cross-sectional area is gradually enlarged and matches the water inlet direction. By setting an elbow, it bends towards the sand settling area of the sand settling box 3-3. An overflow port C 3-2 is arranged at the upper part of the side wall of the sand settling box 3-3. A diversion plate 3-5 is arranged between the water inlet 3-1 and the overflow port C 3-2 for separating the sand settling area from the overflow water outlet area. A sand settling hopper 3-4 is arranged at the bottom of the sand settling box 3-3 for storing the deposited mud and sand. A support 3-6 is used to fixedly support the sand settling box 3-3.

[0033] The spiral sand separating device 4 includes a U-shaped groove 4-2. A shaftless spiral blade 4-1 is arranged in the U-shaped groove 4-2. Motors 4-3 and an emptying port 4-5 are respectively arranged at both ends outside it. The motor 4-3 is used to control the rotation of the spiral blade. A sand falling port 4-4 is arranged at one end of the U-shaped groove 4-2 close to the motor 4-3.

[0034] The water inlet chamber 1-6 and the sand washing chamber 1-7 are two relatively independent cavities, and are only connected through an annular water inlet A 1-1, without affecting the cyclone state in the water inlet chamber 1-6 during backwashing.

[0035] Working process: The sand-water mixture enters the inlet chamber 1-6 tangentially through the water inlet A1-1 for swirling motion. Under the action of centrifugal force, sand-water separation and concentration are achieved. The separated supernatant enters the overflow chamber 1-8 through the central overflow pipe 1-9 and is finally discharged through the overflow port A1-2. The separated sand-water concentrated liquid enters the lower sand washing chamber 1-7, where it is subjected to high-pressure flushing through the reverse water washing port 1-4 to wash the sand-water concentrated liquid, separate the inorganic sand and gravel from the organic matter, and then is discharged through the sand discharge port 1-3 into the subsequent treatment unit. When the equipment stops running, the flushing water port 1-5 is opened to flush the easily blocked pipelines to prevent blockage. The exhaust port A1-10 is used to discharge gas during the operation of the equipment. The concentrated sand-water of the primary cyclone concentration sand washing device 1 enters the concentration cylinder body 2-1 tangentially through the water inlet B2-2 for swirling flow, and is concentrated by using centrifugal force to further reduce the volume of the sand and gravel concentrated liquid. The separated supernatant is discharged through the overflow port B2-3. The concentrated sand-water enters the grit chamber body 3 through the water outlet 2-4 for sand and gravel sedimentation. The concentrated sand-water mixture enters the grit chamber 3-3 through the water inlet C3-1 for sand and gravel sedimentation. The cross-sectional area of the water inlet C3-1 gradually enlarges to control the outlet water flow velocity ≤ 0.4 m / s, so that the water enters the grit chamber body 3 in a swirling and low-flow velocity manner, avoiding short-circuit flow caused by too high flow velocity or too concentrated water flow, and thus reducing the sand and gravel sedimentation efficiency. At the same time, the direction of the sand-water entering the grit chamber body 3 is set through the elbow. In this way, the sedimentation movement path of the sand is extended. The longer the path, the higher the sedimentation efficiency. The sand and gravel gradually settle in the grit chamber 3-3, and the supernatant flows along the direction of the diversion plate 3-5 and finally flows out through the overflow port C3-2.

[0036] The setting of the diversion plate 3-5 separates the sand sedimentation area and the overflow area. At the same time, in cooperation with the water inlet orientation of the grit chamber body 3, it extends the water flow path, avoids the problem of short-circuit flow causing fine sand and gravel to flow out directly with the water flow, and also improves the sand and gravel removal accuracy. The settled sand and gravel gradually accumulate in the grit hopper 3-4 and fall into the U-shaped groove 4-2. When the sand and gravel accumulate to a certain extent, the motor 4-3 is started to control the shaftless spiral blade 4-1 to make a spiral motion in the U-shaped groove 4-2. In this way, the deposited sand and gravel are lifted to the sand discharge port 4-4 and finally discharged. When the whole equipment stops running, the emptying port 4-5 is opened for emptying.

[0037] It should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. The terms used in the description of this application are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to this application. For the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / ", generally represents an "or" relationship between the associated objects before and after.

[0039] It should be noted that in the description of this application, the orientation or positional relationships indicated by the orientation terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing this application and simplifying the description. Without contrary instructions, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the protection scope of this application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

Claims

1. A two-stage cyclone concentration sand washing and sand separating device, characterized in that, It includes a sand-water separation structure. The upper part of the sand-water separation structure is respectively provided with a primary cyclone thickening sand washing device and a secondary cyclone thickening device. The primary cyclone thickening sand washing devices are respectively located on both sides of the secondary cyclone thickening device and are communicated with each other. The sand-water separation structure includes a grit chamber body and a spiral sand separation device located inside it; The primary cyclone thickening sand washing device includes a water inlet chamber. One side of the water inlet chamber is tangentially connected with a water inlet A. An overflow chamber is arranged above it, and the two are communicated through a central overflow pipe. An overflow port A is arranged on one side of the overflow chamber, and an exhaust port A is arranged at its upper end. A sand washing chamber is arranged below the water inlet chamber. The side wall of the sand washing chamber is tangentially connected with a sand discharge port. An anti-washing water inlet is arranged at the upper part of its side wall. The flushing water inlet is arranged at the bottom of the side wall of the sand washing chamber and is 180° with the sand discharge port.

2. The two-stage cyclone concentration sand washing and sand separation device according to claim 1, characterized in that, The water inlet chamber touches the ground through a support frame to play a supporting role.

3. The two-stage cyclone concentration sand washing and sand separation device according to claim 1, characterized in that, The secondary cyclone thickening device includes a thickening cylinder body. An exhaust port is arranged at the top of the thickening cylinder body. Its side wall is tangentially connected with a water inlet B. The upper part of the side wall of the thickening cylinder body is tangentially connected with an overflow port B. A water outlet is arranged at the lower part of the thickening cylinder body.

4. The two-stage cyclone concentration sand washing and sand separating device according to claim 1, characterized in that, The grit chamber body includes a grit chamber. A water inlet C is arranged at the top of the grit chamber. Its cross-sectional area is gradually enlarged and matches the water inlet direction. By setting an elbow, it bends towards the grit deposition area of the grit chamber. An overflow port C is arranged at the upper part of the side wall of the grit chamber. A diversion plate is arranged between the water inlet and the overflow port C to separate the grit deposition area from the overflow water outlet area. A grit hopper is arranged at the bottom of the grit chamber to store the deposited mud and sand. A support is used to fixedly support the grit chamber.

5. The two-stage cyclone concentration sand washing and sand separation device according to claim 1, wherein, The spiral sand separation device includes a U-shaped groove. A shaftless spiral blade is arranged in the U-shaped groove. Motors and emptying ports are respectively arranged at both external ends. The motor is used to control the rotation of the spiral blade. A sand falling port is arranged at one end of the U-shaped groove close to the motor.

6. The two-stage swirl concentration sand washing and sand separation device according to claim 1, characterized in that, The water inlet chamber and the sand washing chamber are two relatively independent cavities, and are only connected through an annular water inlet A, and do not affect the swirling state in the water inlet chamber during backwashing.

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