A sink drainage system applicable to the leachate of solid waste

Abstract

The present invention discloses a sink drain system applicable to the leachate of solid waste, which includes a diversion and filtration device, a shunt pipe, a horizontal flow pipe, a filtration and oil separation tank, a sediment collection device, and a drain pipe; the diversion and filtration device is installed at the inlet end of the shunt pipe and is configured to allow the leachate to enter the shunt pipe at a predetermined rotation angle; the lower end of the shunt pipe is respectively connected to the horizontal flow pipe and the filtration and oil separation tank, and is used for the first diversion of the leachate, and is configured to allow the sediment-laden turbid liquid and the clear liquid to flow down at different speeds, the sediment-laden turbid liquid enters the filtration and oil separation tank, and the initially separated clear liquid enters the horizontal flow pipe; the horizontal flow pipe is respectively connected to the filtration and oil separation tank and the drain pipe, and is used for the re-diversion of the initially separated clear liquid, and is configured to allow the sediment-laden turbid liquid to enter the filtration and oil separation tank, and the clear liquid enters the drain pipe; the filtration and oil separation tank is respectively connected to the sediment collection device and the drain pipe, and is configured to treat the sediment-laden turbid liquid to obtain clear liquid, the clear liquid is discharged into the drain pipe, and the sediment enters the sediment collection device. The present invention can avoid pipeline blockage.

Description

Technical Field

[0001] The present invention relates to a sink drainage system, and particularly to a sink drainage system suitable for leachate of solid waste. Background Art

[0002] At present, municipal solid waste incineration fly ash and medical waste incineration residues need to meet the pollutant concentration limits of leachate in the "Pollution Control Standard for Municipal Solid Waste Landfills" (GB 16889-2008) before they can be landfilled in municipal solid waste landfills. Before detecting the leaching toxicity of 12 metal pollutants such as mercury, copper, zinc, lead, and cadmium, the leachate needs to be prepared according to the "Solid Waste - Leaching Procedure for Leaching Toxicity - Acetic Acid Buffer Solution Method" (HJ / T 300).

[0003] Due to the complex composition of these solid wastes, during the long - time tumbling oscillation process at 30 rpm for 16 ± 2 h, the solid wastes and chelates will disperse and dissolve in the acetic acid solution. Finally, the leachate will be clearly divided into four parts after standing: a small amount of oily suspended matter on the surface layer (mostly chelates added with organic chelating agents), the supernatant on the upper layer, the sediment - containing turbid liquid in the middle and lower layers, and the residue at the bottom layer. In the common "J" - shaped structure sink drain pipe, the fine particles in the sediment - containing turbid liquid will quickly accumulate in the water - seal body of the bending section, resulting in the subsequent residue and sediment directly entering the waste liquid collection / processing device, which is likely to cause pipeline blockage and damage to the subsequent device.

[0004] It should be noted that the information disclosed in the above background art section is only for understanding the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, the present invention provides a sink drainage system suitable for leachate of solid waste.

[0006] The present invention adopts the following technical solutions:

[0007] A sink drainage system applicable to the leachate of solid waste, comprising a diversion and filtration device, a shunt pipe, a horizontal flow pipe, a filtration and oil separation tank, a sediment collection device and a drain pipe; the diversion and filtration device is installed at the inlet end of the shunt pipe, and the diversion and filtration device is configured to make the leachate enter the shunt pipe at a predetermined rotation angle; the lower ends of the shunt pipe are respectively communicated with the horizontal flow pipe and the filtration and oil separation tank, and the shunt pipe is used for the first diversion of the leachate, and is configured to make the sediment turbid liquid and the clear liquid in the leachate flow down at different speeds, so that the slower sediment turbid liquid enters the filtration and oil separation tank, and the faster initially separated clear liquid enters the horizontal flow pipe; the horizontal flow pipe is respectively communicated with the filtration and oil separation tank and the drain pipe, and the horizontal flow pipe is used for the secondary diversion of the initially separated clear liquid, and the horizontal flow pipe is configured to make the slower sediment turbid liquid in the initially separated clear liquid enter the filtration and oil separation tank, and the faster clear liquid enters the drain pipe; the filtration and oil separation tank is respectively communicated with the sediment collection device and the drain pipe, and is configured to sediment the sediment in the sediment turbid liquid entering the filtration and oil separation tank and isolate the suspended matter to obtain clear liquid, and discharge the clear liquid into the drain pipe, and the sediment collection device is used for collecting the deposited sediment.

[0008] Preferably, the horizontal flow pipe has a first sediment discharge hole, a second sediment discharge hole and a deceleration section, the first sediment discharge hole is located at the front end of the deceleration section, the second sediment discharge hole is located at the rear end of the deceleration section, and the horizontal flow pipe is communicated with the filtration and oil separation tank through the first sediment discharge hole and the second sediment discharge hole, wherein the first sediment discharge hole is used for the second diversion of the initially separated clear liquid, and the second sediment discharge hole is used for the third diversion of the clear liquid after the second diversion.

[0009] Preferably, the deceleration section is a section of pipe in the horizontal flow pipe, and a plurality of protrusions are arranged on the inner wall of the pipe; preferably, the protrusions are semi-circular, and the height of the protrusions is 1-2 mm.

[0010] Preferably, the diversion and filtration device is of an inverted frustum structure, and a plurality of diversion gratings are arranged on the side wall of the inverted frustum structure, and the diversion gratings make the leachate enter the shunt pipe at a predetermined rotation angle, and the bottom of the inverted frustum structure is used for collecting residues.

[0011] Preferably, the opening of each diversion grating is diamond-shaped, and two opposite sides of the diamond are parallel to the drainage direction, and the other two opposite sides are inclined in the same direction.

[0012] Preferably, a plurality of diversion gratings on the side wall of the inverted frustum structure are circumferentially distributed in multiple rows, each row of diversion gratings has a uniform interval, and a predetermined interval is provided between the lowermost row of diversion gratings and the bottom of the inverted frustum structure.

[0013] Preferably, the lateral width of each diversion grating is 1-3 mm.

[0014] Preferably, the shunt pipe includes a spiral pipe body and a tee. The inner surface of the pipe body has folds, and a spiral flow guide plate is provided inside to make the leaching solution flow spirally downward. The inlet of the tee communicates with the bottom end of the pipe body. The first outlet of the tee communicates obliquely downward with the horizontal flow pipe, and the second outlet communicates vertically downward with the filtering and oil separation tank.

[0015] Preferably, the folds are evenly distributed on the inner surface of the pipe body, and the depth of the folds is 1-2 mm.

[0016] Preferably, the rotation direction of the leaching solution under the action of the spiral flow guide plate is the same as that under the action of the flow guide grid in the flow guide and filtering device, and the end flow direction of the leaching solution after passing through the spiral flow guide plate is the same as the shunt direction of the tee.

[0017] Preferably, the diameter of the second outlet of the tee is smaller than that of the first outlet.

[0018] Preferably, there is a vertical drop at the connection part between the horizontal flow pipe and the first outlet of the tee, and the first sand discharge hole is located at the bottom of the drop.

[0019] Preferably, the diameters of the first sand discharge hole and the second sand discharge hole are independently 3-5 mm.

[0020] Preferably, the filtering and oil separation tank is provided with a filter screen and a third baffle. The bottom of the filter screen is connected to the top of the third baffle, and the bottom of the third baffle is connected to the bottom inside the filtering and oil separation tank. The inside of the filtering and oil separation tank is separated into a turbid liquid area and a clear liquid area by the filter screen. The bottom inside the turbid liquid area is inclined. The inlet of the sediment collection device is located between the lowest point of the inclined bottom inside the turbid liquid area and the bottom of the third baffle. The turbid liquid area is provided with a first baffle and a second baffle. The first baffle is located between the second outlet of the tee and the first sand discharge hole, and the second baffle is located between the first baffle and the filter screen. The first sand discharge hole and the second sand discharge hole are both located between the first baffle and the second baffle.

[0021] Preferably, the top of the second baffle is flush with the top of the filter screen. The top of the second baffle and the top of the filter screen are connected by an overflow platform. The overflow platform is connected to an overflow slope. The clear liquid area is below the overflow slope. The filtering and oil separation tank also has an overflow area, which is located above the overflow platform and the overflow slope. The position near the bottom of the clear liquid area has a liquid outlet, and the liquid outlet communicates with the sewer pipe. The overflow area also communicates with the sewer pipe.

[0022] Preferably, a retaining net is laid on the overflow inclined surface.

[0023] Preferably, the bottom of the second baffle is lower than the top of the third baffle, and the top of the first baffle is higher than the top of the second baffle.

[0024] The present invention has the following advantages:

[0025] In the sink drainage system of the present invention, the large particle residues in the leachate are intercepted by the diversion and filtration device and then enter the shunt pipe at a predetermined rotation angle. In the shunt pipe, the leachate is first shunted so that the sediment-laden turbid liquid and the clear liquid in the leachate flow down at different speeds. The shunted clear liquid and sediment-laden turbid liquid enter the horizontal flow pipe and the filtration and oil separation tank respectively; after being shunted again in the horizontal flow pipe, the clear liquid is discharged through the drain pipe. After the sediment-laden turbid liquid is treated in the filtration and oil separation tank, the sediment is collected by the sediment collection device, and the clear liquid is discharged through the drain pipe. Through multiple shunt treatments, the problem of pipeline blockage can be avoided.

[0026] In the preferred technical solution, the leachate is first shunted by the diversion effect of the diversion and filtration device and the eddy current formed by the spiral shunt pipe.

[0027] In the preferred technical solution, a first sand discharge hole, a second sand discharge hole and a deceleration section are provided in the horizontal flow pipe. Under the influence of the differential speed, the second shunt and the third shunt are carried out, further reducing the sediment in the clear liquid.

[0028] In the preferred technical solution, baffles are added in the filtration and oil separation tank to achieve the function of oil separation. Connecting the second baffle with the overflow platform and the overflow inclined surface can reduce the pollution of the filter screen by the oil film and suspended matter on the surface of the turbid liquid. Even under the condition of large water flow load, it can be directly discharged into the drain pipe through the overflow inclined surface, avoiding the influence on the clear liquid area.

[0029] In the preferred technical solution, the bottom of the filtration and oil separation tank is designed as an inclined surface, which can better realize the sedimentation of sediment and converge the sediment in the sediment collection device, facilitating the collection and treatment of the sediment of solid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic cross-sectional view of the sink drainage system of the preferred embodiment of the present invention;

[0031] Figure 2 is an enlarged view of the diversion and filtration device 1 in the sink drainage system of the preferred embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of the three-stage shunt in the sink drainage system of the preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0033] The following is a detailed description of the embodiments of the present invention. It should be emphasized that the following description is merely exemplary and not intended to limit the scope of the present invention and its applications. Without conflict, the embodiments and features in the present application can be combined with each other.

[0034] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing or for coupling or communicating.

[0035] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention 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 thus should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0037] The "sediment" in the present invention refers to particulate residues such as fly ash / chelates formed after leaching experiments on hazardous solid waste, which may contain certain toxicity and need to be specially collected and treated. The sink drainage system of the present invention is used to separate the sediment and clear liquid in the leachate obtained after leaching experiments on hazardous solid waste to avoid pipeline blockage.

[0038] Reference Figure 1, an embodiment of the present invention provides a sink drainage system applicable to solid waste leachate, including a diversion and filtration device 1, a shunt pipe 2, a horizontal flow pipe 3, a filtration and oil separation tank 4, a sediment collection device 5, and a drain pipe 6. The diversion and filtration device 1 is installed at the inlet end of the shunt pipe 2 (the inlet end of the solid waste leachate). The diversion and filtration device 1 is configured to allow the leachate to enter the shunt pipe 2 at a predetermined rotation angle. The lower end of the shunt pipe 2 is respectively connected to the horizontal flow pipe 3 and the filtration and oil separation tank 4. The shunt pipe 2 is used for the first diversion of the leachate. It is configured such that the sediment-laden turbid liquid and the clear liquid with a low sediment content in the leachate flow down at different speeds, so that the slower sediment-laden turbid liquid enters the filtration and oil separation tank 4, and the initially separated clear liquid with a faster speed enters the horizontal flow pipe 3. The horizontal flow pipe 3 is respectively connected to the filtration and oil separation tank 4 and the drain pipe 6. The initially separated clear liquid (low sediment content) is decelerated and stratified in the horizontal flow pipe, that is, the horizontal flow pipe 3 is used for the secondary diversion of the initially separated clear liquid. The horizontal flow pipe 3 is configured such that the slower sediment-laden turbid liquid in the initially separated clear liquid enters the filtration and oil separation tank 4, and the faster clear liquid enters the drain pipe 6 and is discharged. The filtration and oil separation tank 4 is respectively connected to the sediment collection device 5 and the drain pipe 6. It is configured to sediment the sediment and isolate the suspended matter in the sediment-laden turbid liquid entering the filtration and oil separation tank 4 to obtain clear liquid, and discharge the clear liquid into the drain pipe 6. The sediment collection device 5 is used to collect the deposited sediment, and the drain pipe 6 is used to discharge the clear liquid therein.

[0039] Reference Figure 1 and Figure 2 , in a preferred embodiment, the diversion and filtration device 1 is in the shape of an inverted frustum. A plurality of diversion grilles 11 are provided on the side wall of the inverted frustum structure. The diversion grilles 11 allow the leachate to enter the shunt pipe 2 at a predetermined rotation angle. The bottom 12 of the inverted frustum structure is used to collect residues. Preferably, the opening of each diversion grille is diamond-shaped. Two opposite sides of the diamond are parallel to the drainage direction (that is, two opposite sides of the diamond are perpendicular downward), and the other two opposite sides are inclined in the same direction. Preferably, a plurality of diversion grilles 11 on the side wall of the inverted frustum structure are circumferentially distributed in multiple rows. Each row of diversion grilles 11 has a uniform spacing. There is a predetermined spacing between the lowermost row of diversion grilles 11 and the bottom 12 of the inverted frustum structure. Preferably, the spacing is about 5 mm. Preferably, the lateral width of each diversion grille 11 is 1 - 3 mm.

[0040] Reference Figure 1 and Figure 3, in a preferred embodiment, the shunt pipe 2 includes a spiral pipe body 22 and a tee pipe 21. The inner surface of the pipe body 22 has wrinkles (not shown in the figure), and the wrinkles are evenly distributed on the inner surface of the pipe body 22 to slow down the flow rate of the edge fluid. And a spiral guide plate 221 is provided inside the pipe body 22 to make the leaching solution flow in a spiral downward direction. The inlet of the tee pipe 21 is connected to the bottom end of the pipe body 22. The first outlet 211 of the tee pipe 21 is obliquely downward and connected to the horizontal flow pipe 3, and the second outlet 212 is vertically downward and connected to the filter oil separation tank 4. Preferably, the wrinkles are evenly distributed on the inner surface of the pipe body, and the depth of the wrinkles is 1-2 mm; preferably, the rotation direction of the leaching solution under the action of the spiral guide plate is the same as the direction under the action of the guide grid in the diversion and filtration device (for example, when viewed from above, the leaching solution rotates counterclockwise), and the end flow direction of the leaching solution after passing through the spiral guide plate is the same as the diversion direction of the tee pipe. Preferably, the diameter of the second outlet 212 of the tee pipe 21 is smaller than the diameter of the first outlet 211.

[0041] Reference Figure 1 and Figure 3 , in a preferred embodiment, the horizontal flow pipe 3 has a first sand discharge hole 31, a second sand discharge hole 32 and a deceleration section 33. The first sand discharge hole 31 is located at the front end of the deceleration section 33, and the second sand discharge hole 32 is located at the rear end of the deceleration section 33. The horizontal flow pipe 3 is connected to the filter oil separation tank 4 through the first sand discharge hole 31 and the second sand discharge hole 32. Among them, the first sand discharge hole 31 is used for the second diversion of the initially separated clear liquid, and the second sand discharge hole 32 is used for the third diversion of the clear liquid after the second diversion. Preferably, the deceleration section 33 is a section of pipe in the horizontal flow pipe 3, and a number of spaced protrusions are arranged on the inner wall of the pipe. More preferably, the protrusions are semicircular, and the height of the protrusions is 1-2 mm. Preferably, there is a vertical drop H at the connection part between the horizontal flow pipe 3 and the first outlet 211 of the tee pipe 21, and the first sand discharge hole 31 is located at the bottom of the drop. Preferably, the diameters of the first sand discharge hole 31 and the second sand discharge hole 32 are independently 3-5 mm.

[0042] Reference Figure 1 and Figure 3 , in a preferred embodiment, the filter oil separation tank 4 is located below the horizontal flow pipe 3. The filter oil separation tank 4 has a filter screen 44 and a third baffle 43. The bottom of the filter screen 44 is connected to the top of the third baffle 43, and the bottom of the third baffle 43 is connected to the bottom inside the filter oil separation tank 4. That is, there is a non-flow area (the third baffle 43) with a certain height at the bottom of the filter screen 44. The filter oil separation tank 4 is separated into a turbid liquid area and a clear liquid area by the filter screen 44 and the third baffle 43 connected thereto (for example, from Figure 1As shown, the left side of the filter screen 44 is the turbid liquid area, and the right side is the clear liquid area). The bottom in the turbid liquid area is inclined. The inlet of the sediment collection device 5 is located between the lowest point of the inclined bottom in the turbid liquid area and the bottom of the third baffle 43. There are a first baffle 41 and a second baffle 42 in the turbid liquid area. The first baffle 41 is located between the second outlet 212 of the tee 21 and the first sand discharge hole 31. The second baffle 42 is located between the first baffle 41 and the filter screen 44. Both the first sand discharge hole 31 and the second sand discharge hole 32 are located between the first baffle 41 and the second baffle 42.

[0043] Reference Figure 1 and Figure 3 , in a preferred embodiment, the top of the second baffle 42 is flush with the top of the filter screen 44. The top of the second baffle 42 and the top of the filter screen 44 are connected by an overflow platform 45. The overflow platform 45 is connected to an overflow slope 46. The clear liquid area is below the overflow slope 46 (that is, the top of the clear liquid area is the overflow slope, that is, the overflow slope 46, the partition net 44, the third baffle 43 and the right side wall of the filter and oil separation tank 4, and a section of the bottom of the filter and oil separation tank 4 together enclose the clear liquid area). There is also an overflow area in the filter and oil separation tank 4, which is located above the overflow platform 45 and the overflow slope 46. A liquid outlet is provided at a position near the bottom of the clear liquid area. The liquid outlet is connected to the sewer pipe. The overflow area is also connected to the sewer pipe (that is, the overflow area and the clear liquid area are separated by the overflow slope 46 and are respectively connected to the sewer pipe 6). Preferably, a retaining net (coarse grille) is laid on the overflow slope 46 to receive the leachate overflowing from the overflow platform 45 and lead it into the sewer pipe 6.

[0044] Reference Figure 1 and Figure 3 , in a preferred embodiment, the bottom of the second baffle 42 is lower than the top of the third baffle 43 (that is, the top of the third baffle 43 exceeds the bottom of the second baffle). The top of the first baffle 41 is higher than the top of the second baffle 42. Preferably, the material of the filter screen 43 is non-metallic chemical fiber, and the aperture of the filter screen is 200 - 400 meshes (0.04 - 0.07 mm).

[0045] In a preferred embodiment, the diversion and filtration device 1 is detachably connected to the inlet end of the shunt pipe 2, the sediment collection device 5 is detachably connected to the filter and oil separation tank 4, and the filter screen 44 is detachably connected to the top of the third baffle 43, thereby improving the durability of the sewage system.

[0046] After the deceleration and sand discharge of the clear liquid through the horizontal flow pipe, the flow rate of the clear liquid will be significantly reduced. In a preferred embodiment, the horizontal flow pipe 3 and the sewer pipe 6 are connected by an arc-shaped connecting pipe to reduce the situation that the clear liquid stops or even flows back to the sand discharge hole during the long-distance horizontal flow process.

[0047] The working process of the sewage system of the water tank applicable to the solid waste leachate in the preferred embodiment of the present invention is as follows:

[0048] Under the action of the spiral flow guide plate 221 and the folds of the pipe body 22, on the one hand, the main body of the leaching solution forms a vortex, and on the other hand, the sediment particles with a larger density are more significantly affected by the deceleration of the folds. In the case of the difference in the inner and outer linear velocities, the leaching solution will be preliminarily shunted, resulting in the sediment turbid liquid tending to flow along the inner wall into the filtration and oil separation tank 4, and the clear liquid tending to flow into the horizontal flow pipe 3 for preliminary separation, and then more precise solid-liquid separation is carried out in the horizontal flow pipe. Specifically, referring to Figures 1-3 , the solid waste leaching solution is preliminarily separated in the diversion and filtration device 1. When passing through the diversion and filtration device 1, the large-particle residues in the sediment will be intercepted by the diversion grille 11 on the inner wall of the diversion and filtration device 1 and fall on the bottom 12 to be collected. Due to a certain lateral offset between the two acute-angled diagonals of the diamond-shaped diversion grille 11 (that is, the two diagonals of the diamond are not on the same vertical line), the leaching solution will pass through the diversion grille 11 at a certain rotation angle (for example, a rotation angle of about 30°) and enter the spiral pipe body 22 of the shunt pipe 2. Under the action of the spiral flow guide plate 221 in the pipe body 22 through the diversion of the diversion grille 11, the leaching solution forms a spiral vortex in the pipe body 22. Affected by the centripetal force, the downward-spiraling leaching solution, combined with the interception effect of the folds on the inner wall of the pipe body 22, the sediment turbid liquid with a larger density (containing more sediment particles) and the clear liquid will flow down at different speeds, so as to achieve the first shunt at the tee 21, where the slow-flowing sediment turbid liquid directly enters the filtration and oil separation tank 4, and the preliminarily separated clear liquid enters the horizontal flow pipe 3. The clear liquid with velocity inertia in the horizontal flow pipe 3 will cross the first sand discharge hole 31, while the slowly flowing sediment turbid liquid will pass through the first sand discharge hole 31 and enter the turbid liquid area of the filtration and oil separation tank 4, realizing the second shunt of the clear liquid and the sediment turbid liquid. The clear liquid passing through the first sand discharge hole 31 decelerates in the deceleration section 33, and the sediment in the clear liquid will further decelerate and stratify, be intercepted and deposited in the deceleration section 33, and gradually flow to the second sand discharge hole 32 driven by the upper clear liquid and enter the turbid liquid area of the filtration and oil separation tank 4, realizing the third shunt of the clear liquid and the turbid liquid. The clear liquid that has undergone the above three shunts is directly discharged into the sewer pipe 6 through the horizontal flow pipe 3.

[0049] The bottom of the turbid liquid area of the oil separation tank 4 with a filter is inclined, and the bottom of the filter screen 42 is not in communication. Therefore, the turbid liquid entering the oil separation tank 4 with a filter will first deposit in the tank of the oil separation tank 4 with a filter. The sediment in the deposit will slowly accumulate in the sediment collection device 5, and the suspended matter in the leachate of the solid waste will float from the surface of the solid waste during the static sedimentation process. Since the bottom of the second baffle 42 is slightly lower than the lower end of the filter screen 42, as the liquid level in the oil separation tank 4 with a filter rises, the suspended matter on the surface of the sediment-laden turbid liquid entering the oil separation tank 4 with a filter from the three-way pipe 21, the first sand discharge hole 31, and the second sand discharge hole 32 will be separated between the first baffle 41 and the second baffle 42, reducing the pollution of the filter screen 44 by the suspended matter. The liquid in the middle layer passes through the filter screen 44 and enters the clear liquid area, and as the liquid level in the clear liquid area rises, it is discharged into the sewer pipe 6. If the treatment load in the oil separation tank 4 with a filter is large, the clear liquid and suspended matter in the upper layer will overflow through the overflow platform 43. The coarse grid on the surface of the overflow slope 44 will disperse and intercept larger suspended matter, and the clear liquid will enter the sewer pipe 6 from the overflow area. Therefore, even in the case of large-load treatment, there will be no blockage of the sewer pipe 6 caused by water flow impact.

[0050] The preferred embodiment of the present invention avoids the problem of pipeline blockage, realizes the targeted treatment of the leachate of solid waste through shunt, further improves the impact resistance of the water drainage system of the water tank, and reduces the burden on subsequent treatment facilities.

[0051] The above content is a further detailed description of the present invention in combination with specific / preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, they can also make several substitutions or modifications to these described embodiments, and these substitution or modification methods should be regarded as belonging to the protection scope of the present invention. In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "preferred embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the protection scope of the patent application.

Claims

1. A sink drain system applicable to the leachate of solid waste, characterized in that: It includes a diversion and filtration device, a shunt pipe, a horizontal flow pipe, a filtration and oil separation tank, a sediment collection device, and a sewer pipe; The diversion and filtration device is installed at the inlet end of the shunt pipe, and the diversion and filtration device is configured to allow the leachate to enter the shunt pipe at a predetermined rotation angle; The lower ends of the shunt pipe are respectively connected to the horizontal flow pipe and the filtration and oil separation tank. The shunt pipe includes a spiral pipe body and a tee. The inner surface of the pipe body has wrinkles, and a spiral guide plate is provided inside to make the leachate flow in a spiral downward manner. The inlet of the tee is connected to the bottom end of the pipe body. The first outlet of the tee is obliquely downward connected to the horizontal flow pipe, and the second outlet is vertically downward connected to the filtration and oil separation tank. The shunt pipe is used for the first diversion of the leachate, and is configured to make the sediment turbid liquid and the clear liquid in the leachate flow down at different speeds, so that the slower sediment turbid liquid enters the filtration and oil separation tank, and the faster initially separated clear liquid enters the horizontal flow pipe; The horizontal flow pipe is respectively connected to the filtration and oil separation tank and the sewer pipe. The horizontal flow pipe has a first sand discharge hole, a second sand discharge hole, and a deceleration section. The first sand discharge hole is located at the front end of the deceleration section, and the second sand discharge hole is located at the rear end of the deceleration section. The horizontal flow pipe is connected to the filtration and oil separation tank through the first sand discharge hole and the second sand discharge hole. The horizontal flow pipe is used for the secondary diversion of the initially separated clear liquid. The horizontal flow pipe is configured to make the slower sediment turbid liquid in the initially separated clear liquid enter the filtration and oil separation tank, and the faster clear liquid enter the sewer pipe; The filtration and oil separation tank is respectively connected to the sediment collection device and the sewer pipe, and is configured to sediment the sediment and isolate the suspended matter in the sediment turbid liquid entering the filtration and oil separation tank to obtain clear liquid, and discharge the clear liquid into the sewer pipe. The sediment collection device is used to collect the deposited sediment. The filtration and oil separation tank has a filter screen and a third baffle. The bottom of the filter screen is connected to the top of the third baffle, and the bottom of the third baffle is connected to the inner bottom of the filtration and oil separation tank. The inside of the filtration and oil separation tank is separated into a turbid liquid area and a clear liquid area by the filter screen. The turbid liquid area has a first baffle and a second baffle. The first baffle is located between the second outlet of the tee and the first sand discharge hole, and the second baffle is located between the first baffle and the filter screen. The first sand discharge hole and the second sand discharge hole are both located between the first baffle and the second baffle. The top of the second baffle is flush with the top of the filter screen, and the top of the second baffle and the top of the filter screen are connected by an overflow platform.

2. The sink drain system according to claim 1, wherein: The first sand discharge hole is used for the second diversion of the initially separated clear liquid, and the second sand discharge hole is used for the third diversion of the clear liquid after the second diversion.

3. The sink drain system according to claim 1, wherein: The deceleration section is a section of pipeline in the horizontal flow pipe, and a number of protrusions are arranged on the inner wall of the pipeline; the protrusions are semi-circular, and the height of the protrusions is 1-2 mm.

4. The sink drain system according to claim 1, wherein: The diversion and filtration device is in the shape of an inverted frustum. A number of diversion grilles are provided on the side wall of the inverted frustum structure. The diversion grilles enable the leaching solution to enter the shunt pipe at a predetermined rotation angle. The bottom of the inverted frustum structure is used to collect residues.

5. The sink drain system according to claim 4, wherein: The opening of each diversion grille is diamond-shaped. Two opposite sides of the diamond are parallel to the downward water flow direction, and the other two opposite sides are inclined in the same direction. The number of diversion grilles on the side wall of the inverted frustum structure is distributed in multiple rows circumferentially. The diversion grilles in each row have uniform intervals. There is a predetermined distance between the lowermost row of diversion grilles and the bottom of the inverted frustum structure. The lateral width of each diversion grille is 1 - 3 mm.

6. The sink drainage system according to claim 4, wherein: The folds are evenly distributed on the inner surface of the pipe body. The depth of the folds is 1 - 2 mm. The rotation direction of the leaching solution under the action of the spiral diversion plate is the same as that under the action of the diversion grilles in the diversion and filtration device. The end flow direction of the leaching solution after passing through the spiral diversion plate is the same as the shunt direction of the tee. The diameter of the second outlet of the tee is smaller than that of the first outlet.

7. The sink drain system according to claim 6, characterized in that: There is a vertical drop at the connection part between the straight flow pipe and the first outlet of the tee. The first sand discharge hole is located at the bottom of the drop. The diameters of the first sand discharge hole and the second sand discharge hole are independently 3 - 5 mm.

8. The sink drainage system according to claim 1, characterized in that: The bottom in the turbid liquid area is inclined. The inlet of the sediment collection device is located between the lowest point of the inclined bottom in the turbid liquid area and the bottom of the third baffle.

9. The sink drain system according to claim 8, characterized in that: The overflow platform is connected to the overflow slope. The clear liquid area is below the overflow slope. There is also an overflow area in the oil filtration tank, which is above the overflow platform and the overflow slope. There is a liquid outlet at a position near the bottom of the clear liquid area. The liquid outlet is connected to the sewer pipe. The overflow area is also connected to the sewer pipe. A retaining net is laid on the overflow slope.

10. The sink drainage system according to claim 8, wherein: The bottom of the second baffle is lower than the top of the third baffle. The top of the first baffle is higher than the top of the second baffle.

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