Pressure-reducing anti-floating device for concentration tank

Abstract

The utility model belongs to the technical field of concentration tanks, and particularly relates to a concentration tank pressure reduction anti-floating device which comprises a bottom plate water filtering layer, a water collecting blind ditch, a pump room, a water collecting pipe and a water collecting pit. The bottom plate water filtering layer is positioned between the foundation base surface and the concentration tank bottom plate; the water collecting blind ditch is positioned between the outer side of the central column foundation and the foundation surface; a drainage pump group is arranged in the pump room; the water collecting pit is positioned below the top surface of a bottom plate of the pump room; one end of the water collecting pipe extends into the water collecting blind ditch, and the other end of the water collecting pipe penetrates through the side wall of the pump room and extends into the water collecting pit. Compared with the prior art, the pressure-reducing and anti-floating device for the concentration tank has the advantages that the bottom plate water filtering layer and the water collecting blind ditch are arranged at the lower part of the bottom plate structure of the concentration tank, underground water is collected to the water collecting pit through the drainage pipe embedded in the side wall of the bottom pump room, and the drainage pump group is arranged to drain water to the earth surface drainage ditch; therefore, underground water gravity flow collection and automatic emptying are realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of thickening tanks, and particularly relates to a decompression and anti-floating device for a thickening tank. Background Art

[0002] As a common industrial structure, the thickening tank is widely used in the metallurgical industry and is mainly used for the thickening treatment process of tailings pulp. The thickening tank is generally arranged semi-underground, the bottom of the tank is buried underground, and the bottom of the tank is in an inverted cone shape. During the construction and use of the thickening tank, the groundwater with a relatively high water level generates an upward buoyancy force on it. To ensure its normal use, anti-floating design of the thickening tank is required.

[0003] Draining and decompressing the water in the tank is a common anti-floating treatment method. This method has the characteristics of stability, reliability, simple construction, and low investment. The Chinese utility model patent with the application number CN202221911759.1 discloses an "anti-floating water tank", which drains the groundwater in the filter layer into the drainage well, and the drainage well then drains the water to the outside. By setting a control component, the water level of the drainage well is continuously controlled below the height of the filter layer, so as to ensure that the groundwater at the bottom of the tank can be drained in time during the maintenance period without generating pressure on the bottom plate of the water tank. However, the above patent does not have universal applicability. For water tanks with bottoms not on the same horizontal plane, especially inverted conical water tanks, the drain pipe cannot achieve the function of emptying groundwater through gravity flow.

[0004] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a decompression and anti-floating device for a thickening tank to overcome the technical problems mentioned in the above background art.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A decompression and anti-floating device for a thickening tank includes a bottom plate filter layer, a collecting blind ditch, a pump house, a collecting pipe, and a collecting sump;

[0008] The bottom plate filter layer is located between the foundation base surface and the bottom plate of the thickening tank; the collecting blind ditch is located between the outside of the central column foundation and the foundation base surface; a drainage pump group is arranged in the pump house; the collecting sump is located below the top surface of the bottom plate of the pump house; one end of the collecting pipe extends into the collecting blind ditch, and the other end passes through the side wall of the pump house and extends into the collecting sump.

[0009] Preferably, the bottom plate filter layer is successively composed of an anti-filter geotextile, a thick gravel drainage layer, and a geotextile from top to bottom;

[0010] The specification of the anti-filter geotextile in the bottom plate filter layer is ≥300 g / m 2, the thickness of the thick gravel drainage layer is 300 mm, and the specification of the geotextile is ≥ 200 g / m² 2 .

[0011] Preferably, the water collecting blind ditch from outside to inside is in turn an anti-filter geotextile, a thick gravel drainage layer and a geotextile;

[0012] The specification of the anti-filter geotextile in the water collecting blind ditch is ≥ 300 g / m² 2 , the thickness of the thick gravel drainage layer is 500 mm, and the specification of the geotextile is ≥ 200 g / m² 2 .

[0013] Preferably, a stainless steel perforated pipe is arranged in the thick gravel drainage layer of the water collecting blind ditch, and the stainless steel perforated pipe is communicated with the water collecting pipe.

[0014] Preferably, the length of the water collecting pipe extending into the water collecting blind ditch is not less than 300 mm, and the length of the water collecting pipe extending into the water collecting pit is not less than 200 mm.

[0015] Preferably, the end of the water collecting pipe extending into one side of the water collecting blind ditch is blocked by a steel grate with a pore diameter ≤ 30 mm.

[0016] Preferably, small holes with a pore diameter of φ30 mm are uniformly arranged around the circumference of the water collecting pipe extending into one side of the water collecting blind ditch.

[0017] Preferably, the outer circumference of the water collecting pipe extending into one side of the water collecting blind ditch is wrapped with an anti-filter geotextile of ≥ 300 g / m² 2 and wrapped with an anti-filter geotextile.

[0018] Preferably, a liquid level gauge is arranged in the water collecting pit.

[0019] Preferably, the ultimate compressive strength of the gravel in the thick gravel drainage layer of the water collecting blind ditch and the thick gravel drainage layer of the bottom plate filter layer is not less than 40 MPa, the content of particles less than 2 cm does not exceed 5%, the softening coefficient is not less than 0.9, the Mohs hardness is not less than 3, and the porosity after rolling is not more than 35%.

[0020] Compared with the prior art, a pressure reducing and anti-floating device for a thickener proposed by the present utility model is provided with a bottom plate filter layer and a water collecting blind ditch under the bottom plate structure of the thickener. Groundwater is collected into the water collecting pit through a drain pipe buried on the side wall of the bottom pump house, and a drainage pump group is configured to drain the water to the surface drainage ditch, so as to realize the collection of groundwater by gravity flow and automatic emptying.

[0021] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, the detailed description is as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model, and thus should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a pressure-reducing anti-floating device for a thickener provided by an embodiment of the present utility model.

[0024] Figure 2 For Figure 1 the sectional view taken along A-A in

[0025] It is schematically shown in the figure as follows:

[0026] 1. Bottom plate water filtration layer; 2. Catch water blind ditch; 3. Catch water pipe; 4. Catch water pit; 5. Pump house; 6. Pump house entrance; 7. Center column of thickener; 8. Bottom plate of thickener; 9. Side wall of thickener; 10. Foundation base surface. Specific embodiments

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. The components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] As Figure 1-2 shown, the embodiment of the present utility model provides a pressure-reducing anti-floating device for a thickener. Among them, in the present utility model, the bottom plate of the thickener is conical in shape, and the pressure-reducing anti-floating device includes a bottom plate water filtration layer 1, a catch water blind ditch 2, a pump house 5, a catch water pipe 3, and a catch water pit 4;

[0029] The bottom plate water filtration layer 1 is located between the foundation base surface 10 and the bottom plate 8 of the thickener; the catch water blind ditch 2 is located between the outside of the center column foundation and the foundation base surface 10; a drainage pump group is arranged in the pump house 5; the catch water pit 4 is located below the top surface of the bottom plate of the pump house 5; one end of the catch water pipe 3 extends into the catch water blind ditch 2, and the other end passes through the side wall of the pump house 5 and extends into the catch water pit 4.

[0030] Among them, the bottom plate water filtration layer 1 is successively from top to bottom an inverse filtration geotextile, a thick gravel drainage layer and a geotextile; the specification of the inverse filtration geotextile in the bottom plate water filtration layer 1 is ≥300 g / m2, the thickness of the thick gravel drainage layer is 300 mm, and the specification of the geotextile is ≥200 g / m2. In this embodiment, the water generated on the foundation base surface below the bottom plate water filtration layer 1 will not penetrate below the bottom plate 8 of the thickener, but will flow into the water collection blind ditch 2 along the thick gravel drainage layer in the bottom plate water filtration layer 1. At the same time, an inverse filtration geotextile is arranged on the uppermost layer of the bottom plate water filtration layer 1 to further prevent water from passing through the bottom plate water filtration layer 1 and entering the bottom plate 8 of the thickener, thereby avoiding generating buoyancy on the bottom plate 8 of the thickener.

[0031] The water collection blind ditch 2 is successively from outside to inside an inverse filtration geotextile, a thick gravel drainage layer and a geotextile; the specification of the inverse filtration geotextile in the water collection blind ditch 2 is ≥300 g / m2, the thickness of the thick gravel drainage layer is 500 mm, and the specification of the geotextile is ≥200 g / m2. In this embodiment, the water generated on the foundation base surface outside the foundation of the central column 7 of the thickener will not penetrate outside the foundation of the central column 7 of the thickener, but will be drained away along the thick gravel drainage layer in the water collection blind ditch 2. At the same time, an inverse filtration geotextile is arranged on the innermost layer of the water collection blind ditch 2 to further prevent water from passing through the water collection blind ditch 2 and entering outside the foundation of the central column 7 of the thickener, thereby avoiding generating buoyancy on the outside of the central column foundation. Here, it should be noted that the outside of the foundation of the central column 7 of the thickener refers to the side wall 9 of the thickener.

[0032] A stainless steel perforated pipe is arranged in the thick gravel drainage layer of the water collection blind ditch 2, and the stainless steel perforated pipe is communicated with the water collection pipe 3. In this way, the water in the water collection blind ditch 2 can be further strengthened to flow into the water collection pipe 3 through the stainless steel perforated pipe. In this embodiment, small holes with a pore diameter of φ30 mm are evenly arranged on the surface of the stainless steel pipe perforated pipe, so as to prevent the gravel in the thick gravel drainage layer from entering the stainless steel perforated pipe and affecting the drainage effect of the stainless steel pipe perforated pipe.

[0033] In this embodiment, the length of the water collection pipe 3 extending into the water collection blind ditch 2 is not less than 300 mm, and the length of the water collection pipe 3 extending into the water collection pit 4 is not less than 200 mm. The end of the water collection pipe 3 extending into one side of the water collection blind ditch 2 is blocked by a steel grate with a pore diameter ≤30 mm. Small holes with a pore diameter of φ30 mm are evenly arranged on the circumferential circle of the water collection pipe 3 extending into one side of the water collection blind ditch 2. The outer circumferential circle of the water collection pipe 3 extending into one side of the water collection blind ditch 2 is wrapped with an inverse filtration geotextile with a specification of ≥300 g / m2.

[0034] In this embodiment, a liquid level gauge is arranged in the water collection pit 4. Through the liquid level gauge, the working condition of the drainage pump group can be monitored. If there is a problem, personnel can enter the water collection pit 4 through the pump house entrance 6 for maintenance. At the same time, the water pipe discharging outward in the water collection pit 4 also passes through the pump house entrance 6 and leads to the bottom drainage ditch.

[0035] In this embodiment, the ultimate compressive strength of the gravel in the thick gravel drainage layer of the water-collecting blind ditch 2 and the thick gravel drainage layer of the bottom plate water filtration layer 1 is not less than 40 MPa, the content of particles smaller than 2 cm does not exceed 5%, the softening coefficient is not lower than 0.9, the Mohs hardness is not lower than 3, and the porosity after rolling is not greater than 35%.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. It is only for the convenience of describing the present utility model 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 should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0038] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0039] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model. 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 defined and explained in subsequent drawings.

Claims

1. A decompression anti-floating device for a thickener, characterized in that, It includes a bottom plate water filtration layer, a blind drainage ditch, a pump house, a collecting pipe and a sump pit; The bottom plate water filtration layer is located between the foundation base surface and the bottom plate of the thickener; the blind drainage ditch is located between the outside of the central column foundation and the foundation base surface; a drainage pump set is arranged in the pump house; the sump pit is located below the top surface of the bottom plate of the pump house; one end of the collecting pipe extends into the blind drainage ditch, and the other end passes through the side wall of the pump house and extends into the sump pit.

2. The pressure-reducing anti-floating device for a thickener according to claim 1, wherein The bottom plate water filtration layer is successively composed of an anti-filter geotextile, a thick gravel drainage layer and a geotextile from top to bottom; The specification of the filter geotextile in the bottom plate filter layer is ≥ 300 g / m 2 , the thickness of the thick gravel drainage layer is 300 mm, and the specification of the geotextile is ≥ 200 g / m 2 .

3. The decompression anti-floating device for a thickening tank according to claim 2, wherein, The blind drainage ditch is successively composed of an anti-filter geotextile, a thick gravel drainage layer and a geotextile from outside to inside; The specification of the filter geotextile in the water collection blind ditch is ≥ 300 g / m 2 , the thickness of the thick gravel drainage layer is 500 mm, and the specification of the geotextile is ≥ 200 g / m 2 .

4. The pressure-reducing anti-floating device for a thickener according to claim 3, characterized in that, A stainless steel perforated pipe is arranged in the thick gravel drainage layer in the blind drainage ditch, and the stainless steel perforated pipe is communicated with the collecting pipe.

5. The decompression anti-floating device for a thickener according to claim 4, characterized in that, The length of the collecting pipe extending into the blind drainage ditch is not less than 300 mm, and the length of the collecting pipe extending into the sump pit is not less than 200 mm.

6. The pressure reduction and anti-floating device for a thickening tank according to claim 5, characterized in that, The end of the collecting pipe extending into the blind drainage ditch is blocked by a steel grate with a pore diameter ≤ 30 mm.

7. The decompression and anti-floating device for a thickener according to claim 6, wherein, Small holes with a pore diameter of φ30 mm are uniformly arranged around the circumference of the collecting pipe extending into the blind drainage ditch.

8. A pressure-reducing anti-floating device for a thickening tank according to claim 7, characterized in that, The outer side of the pipe circumference of the collecting pipe extending into one side of the blind drainage ditch is wrapped with a filter geotextile with a weight of ≥ 300 g / m 2 ​ 9. The pressure-reducing anti-floating device for a thickener according to claim 8, wherein, A liquid level gauge is arranged in the sump pit.

10. The decompression and anti-floating device for a thickener according to claim 9, characterized in that, The crushed stone ultimate compressive strength of the thick gravel drainage layer in the blind drainage ditch and the thick gravel drainage layer in the bottom plate water filtration layer is not less than 40 MPa, the content of particles less than 2 cm does not exceed 5%, the softening coefficient is not less than 0.9, the Mohs hardness is not less than 3, and the porosity after rolling is not more than 35%.

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