Wastewater treatment device and system

Abstract

The utility model discloses a waste water treatment device and system.The waste water treatment device comprises a waste water outer bin, a filtering inner bin and a power unit, the filtering inner bin and the power unit are installed in an inner cavity of the waste water outer bin, the power unit drives the filtering inner bin to rotate, and a plurality of water inlet holes are formed in the surface of the filtering inner bin; a spiral sheet is fixed on the surface of the filtering inner bin, a sample inlet is formed in the middle of the wastewater outer bin, the distance between a rotating shaft of the spiral sheet and the inner wall of the wastewater outer bin is a, the distance between the outer side of the spiral sheet and the inner wall of the wastewater outer bin is (1 / 5-1 / 6) a, a bottom slag outlet is formed in the bottom of the filtering inner bin, and a water outlet is formed in the bottom of the filtering inner bin. A clear water outlet is formed in the top of the filtering inner bin. The sedimentation tank is short in sedimentation time and high in efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a wastewater treatment device and system, which is especially suitable for treating cavern wastewater. Background Technology

[0002] Cavern wastewater refers to the inrush water and construction water discharged from the excavation face of underground powerhouses and water systems. In the early stages of construction, the underground powerhouses and water systems primarily involve earthwork excavation, and the discharged wastewater mainly consists of suspended solids and petroleum hydrocarbons (the main pollutants are: SS: 1500mg / L~3000mg / L, petroleum hydrocarbon concentration approximately 2mg / L~10mg / L). In the later stages of construction, the main wastewater is from concrete pouring, and existing treatment technologies include:

[0003] Coagulation sedimentation technology is based on traditional natural sedimentation technology. It involves adding coagulants and coagulant aids, allowing the sludge to settle through a long period of retention, and then manually cleaning the bottom sludge. This technology requires frequent sludge cleaning during application and is prone to various malfunctions.

[0004] Inclined plate / inclined tube sedimentation technology shortens the particle settling distance and improves treatment efficiency by adding inclined plates in the sedimentation tank. However, this technology is prone to sludge accumulation and requires regular backwashing; otherwise, long-term operation can easily affect the quality of the effluent.

[0005] Cyclone separation technology is a method of solid-liquid separation that uses the gravity difference generated by hydraulic cyclone. The internal inclined tube is in a closed state, which makes it difficult to clean and repair when it is blocked. The outlet section is equipped with foam filter media or micro sand filter media, which requires regular backwashing and replacement after adsorption saturation. At the same time, if the tank is too high, the equipment is inconvenient to operate and difficult to maintain.

[0006] Magnetic coagulation sedimentation technology adds magnetic media to conventional coagulation sedimentation, which increases the specific gravity of flocs and accelerates sedimentation. However, this technology is less effective at treating certain metal ions, consumes more energy, and requires a relatively large equipment footprint.

[0007] Super magnetic separation technology is an ultra-high-speed water purification technology based on magnetic flocculation and magnetic separation. Under the action of coagulants and flocculants, magnetic flocs are formed with magnetic seeds, and pollutants are finally removed in the form of magnetic suspended matter. This technology has problems such as unstable quality of magnetic materials, adhesion of small magnetic particles, high requirements for water quality, high technical cost, and high operating cost.

[0008] If untreated wastewater from the cavern is discharged directly into surface water bodies outside the cavern, it will have an adverse impact on the physical and chemical properties of the water, aquatic organisms, and the water landscape. Therefore, it is necessary to treat the wastewater from the cavern construction to meet the discharge standards and reduce the impact on the environment. Existing treatment technologies have problems such as long hydraulic retention time, large footprint, low treatment efficiency, high equipment failure rate, and high operating costs.

[0009] Chinese patent CN210736476U discloses a deep treatment device for dyeing and printing wastewater. A filtration device for filtering sediment is connected between a sedimentation tank and a biochemical treatment tank. The filtration device includes an inclined cylindrical body with an inlet and a slag outlet on its side wall. The slag outlet is located at the upper end of the cylindrical body, while the inlet is located on the side wall in the middle of the cylindrical body. An internal pushing mechanism is provided to push the sediment towards the slag outlet. The pushing mechanism includes a rotating rod with a filter element (a spiral-shaped filter disc) connected to it. The end of the cylindrical body away from the sealing element is a drain outlet for discharging wastewater, with a filter plate connected to it. The filter plate has a through hole communicating with the hollow interior of the rotating rod. This device can only be installed at an incline, has a fixed installation method, requires a large floor space, and its filtration efficiency needs improvement. Utility Model Content

[0010] The technical problem to be solved by this utility model is to provide a wastewater treatment device and system with high wastewater treatment efficiency, which addresses the shortcomings of the existing technology.

[0011] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0012] A wastewater treatment device includes an outer wastewater chamber, a power unit, and an inner filter chamber installed in the inner cavity of the outer wastewater chamber. The power unit drives the inner filter chamber to rotate. The surface of the inner filter chamber has multiple water inlet holes. A spiral blade is fixed on the surface of the inner filter chamber. The sample inlet is located in the middle of the outer wastewater chamber. The distance between the axis of rotation of the spiral blade and the inner wall of the outer wastewater chamber is 'a'. The distance between the outer side of the spiral blade and the inner wall of the outer wastewater chamber is (1 / 5 to 1 / 6)a. The bottom of the inner filter chamber has a bottom slag outlet, and the clean water outlet is located at the top of the inner filter chamber.

[0013] When the spiral blades are running, centrifugal force is used to separate solid waste from clean water. After the power unit stops, under the action of gravity, the solid waste settles downwards along the inner wall of the outer wastewater chamber and eventually falls into the internal slag outlet, improving treatment efficiency.

[0014] The distance between the outer side of the spiral blade and the inner wall of the wastewater outer chamber is (1 / 5 to 1 / 6)a. This distance ensures that the spiral blade does not scrape against the inner wall of the wastewater outer chamber, while the inner wall of the wastewater outer chamber can catch the solid waste.

[0015] In a preferred embodiment of this utility model, the wastewater treatment device is installed vertically or horizontally; preferably, the outer wastewater chamber is hexagonal prism in shape.

[0016] When the wastewater outer chamber is a hexagonal prism, in the cross-section perpendicular to the axis of rotation of the spiral blade, a perpendicular line is drawn from a point on the axis of rotation of the spiral blade to the side length of the hexagonal cross-section, and the length of this perpendicular line is the distance a.

[0017] In a vertical installation, the slag outlet is located at the bottom of the filter chamber, the clean water outlet is located at the top of the filter chamber, and the rotation axis of the filter chamber is perpendicular to the ground. In a horizontal installation, the rotation axis of the filter chamber is parallel to the ground.

[0018] This utility model allows for different placement methods to suit the specific circumstances of different projects, thus saving land.

[0019] In a preferred embodiment of this utility model, a base is installed at the bottom of the wastewater outer chamber. The base consists of a vertically arranged outer shell and an inner shell. An internal slag outlet is provided at the top of the base, and a bottom slag outlet is opened on the surface of the inner shell. The internal slag outlet and the bottom slag outlet are interconnected.

[0020] In a preferred embodiment of this utility model, the plurality of bottom slag outlets are connected to the slag main pipe through slag branch pipes, and the other end of the slag main pipe is connected to the slag pump.

[0021] In a preferred embodiment of this utility model, an inverted frustum-shaped mud guide plate is installed at the bottom of the filter inner chamber, and the bottom of the mud guide plate is located directly above the internal slag outlet.

[0022] The lower end of the filter chamber is the mud guide plate, which can push the settled solid waste outward and finally flow to the bottom internal slag outlet, further improving the treatment effect.

[0023] In a preferred embodiment of this utility model, the outer shell is a regular hexagonal frustum, and the inner shell is a frustum of a cylinder.

[0024] This shape allows the application to be used in either an upright or horizontal position, providing high flexibility. The lower half of the outer wall is inserted obliquely upward into the inner cavity, with two sample inlets. The sample inlets have a threaded structure, which is more stable than the sleeve connection method.

[0025] The base provides support for the outer wastewater chamber, and the inner slag outlet at the bottom of the inner cavity is connected to the bottom slag outlet, so that solid waste can be discharged more easily under the action of gravity.

[0026] In a preferred embodiment of this utility model, an electric switch is installed on the slag discharge main pipe.

[0027] The electric switch is installed on the slag discharge main pipe to control the slag discharge time.

[0028] In a preferred embodiment of the present invention, the inlet includes inlet 1 and inlet 2, which are located in the lower half of the wastewater outer chamber and are inclined downwards in the direction of water inlet 1 and inlet 2.

[0029] When installed upright, the direction facing the bottom slag outlet is downward.

[0030] In a preferred embodiment of this utility model, the top of the filter inner chamber is fixed with an upper sealing cover with the clean water outlet in the middle, a connecting wheel is fixed on the outer periphery of the upper sealing cover, and a belt is sleeved between the connecting wheel and the drive shaft of the power unit.

[0031] The upper end of the inner cavity of the clean water is the upper sealing cover, and the middle opening is the clean water outlet, which can ensure that clean water flows out.

[0032] The upper sealing cover has a connecting wheel on its outer periphery, which is connected to the belt. The other end is connected to the power unit. The main function of the power unit is to drive the filter chamber to rotate intermittently. The rotation cycle is 10 minutes of rotation and 50 minutes of rest. The rotation speed can be adjusted according to the particle size of suspended solids in the wastewater, and is generally around 1500 r / min.

[0033] The outer wall of the filter chamber has four longitudinal strips, which can support the filter chamber more stably. The spiral blades are attached to the longitudinal strips of the inner wall and are not easy to fall off.

[0034] This utility model also discloses a wastewater treatment system, which consists of multiple wastewater treatment devices connected in series. The clean water outlet of the previous wastewater treatment device is connected to the sample inlet of the next wastewater treatment device. Preferably, the diameter of the water inlet of the previous wastewater treatment device is larger than the diameter of the water inlet of the next wastewater treatment device.

[0035] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0036] (1) The sedimentation time is short, the efficiency is high, the treatment cost is reduced, and the sewage can be discharged in compliance with standards.

[0037] (2) This application can increase or decrease the number of equipment according to different water inlet conditions, which is highly adaptable. At the same time, it can adopt two operating modes, horizontal or vertical, according to the actual situation of the project, which is extremely flexible.

[0038] (3) Compared with existing sedimentation technologies, both coagulation sedimentation technology and inclined plate / inclined tube sedimentation technology often require a large area and have a long sedimentation time, while the present application has a very small footprint.

[0039] (4) This application does not require the addition of special chemicals such as magnetic media, and does not require regular backwashing of the equipment. It is simple to operate and has low operating costs. Attached Figure Description

[0040] Figure 1 This is a perspective structural diagram of a wastewater treatment device according to an embodiment of the present invention.

[0041] Figure 2 This is a front view perspective view of the wastewater treatment device in one embodiment of the present utility model;

[0042] Figure 3 This is a detailed drawing of the base of the wastewater treatment device in one embodiment of the present invention;

[0043] Figure 4 This is a detailed drawing of the filter chamber of a wastewater treatment device according to one embodiment of the present invention.

[0044] In the attached image:

[0045] Wastewater treatment device 1, outer wastewater chamber 2, outer wall 2.1, inner cavity 2.2, inlet 1 2.3, inlet 2 2.4, base 2.5, bottom slag outlet 2.6, internal slag outlet 2.7, slag outlet branch pipe 2.8, slag outlet main pipe 2.9, electric switch 2.10, slag outlet pump 2.11, outer casing 2.12, inner casing 2.13, filter inner chamber 3, outer wall of inner chamber 3.1, clear water inner cavity 3.2, clear water outlet 3.3, longitudinal strips on the outer wall of inner cavity 3.4, upper sealing cover 3.5, spiral blade 3.6, water inlet hole 3.7, mud guide plate 3.8, connecting wheel 3.9, belt 3.10, power unit 4. Detailed Implementation

[0046] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0047] See Figure 1-2A wastewater treatment device, characterized in that it includes a treatment device 1, a wastewater outer chamber 2, a filter inner chamber 3, and a power unit 4.

[0048] Wastewater treatment device 1 is a regular hexagonal structure that can be placed either vertically or horizontally.

[0049] The wastewater outer chamber 2 includes an outer wall 2.1, an inner cavity 2.2, a sample inlet 12.3, a sample inlet 22.4, a base 2.5, a bottom slag outlet 2.6, an internal slag outlet 2.7, a slag outlet branch pipe 2.8, a slag outlet main pipe 2.9, an electric switch 2.10, and a slag outlet pump 2.11.

[0050] The outer wall 2.1 is a regular hexahedral sealed structure. The inlet 12.3 and the inlet 22.4 are located on the lower half of the outer wall 2.1 and are inserted into the inner cavity 2.2 at an upward angle.

[0051] See Figure 3 The base 2.5 is shaped like a regular hexagonal platform with a truncated cone in the middle. The bottom slag outlet 2.6 is located at the center of the arc surface of the base 2.5. There is a bottom slag outlet 2.6 at the center of the arc surface of each of the six bases 2.5. The bottom slag outlet 2.7 of the inner cavity 2.2 is connected to the bottom slag outlet 2.6.

[0052] The slag discharge branch pipe 2.8 is connected to the bottom slag discharge port 2.6. The last six slag discharge branch pipes 2.8 are connected together to the slag discharge main pipe 2.9, and finally connected to the slag discharge pump 2.11. An electric switch 2.10 is installed on the slag discharge main pipe 2.9.

[0053] The filter chamber 3 includes an outer wall 3.1, a clean water inner cavity 3.2, a clean water outlet 3.3, longitudinal strips on the outer wall of the inner cavity 3.4, a sealing cover 3.5, a spiral blade 3.6, a water inlet 3.7, a mud guide plate 3.8, a connecting wheel 3.9, and a belt 3.10.

[0054] See Figure 4 The filter inner chamber 3 is cylindrical in shape, with a large contact surface with wastewater. The outer wall of the filter inner chamber has evenly distributed circular inlet holes. The diameter of these circular inlet holes can be adjusted according to different water qualities, making it highly adaptable. The outer wall 3.1 of the filter inner chamber has evenly distributed circular inlet holes 3.7, allowing clean water to pass through.

[0055] The outer wall 3.1 of the filter chamber has four longitudinal strips 3.4, and spiral blades 3.6 are attached to the longitudinal strips 3.4.

[0056] The upper end of the inner cavity 3.2 is covered with a sealing cap 3.5, and the middle opening is the clean water outlet 3.3, which can ensure that clean water flows out.

[0057] The lower end of the filter inner chamber 3 is a mud guide plate 3.8, which can push the settled solid waste outward and finally flow to the bottom inner slag outlet 2.7.

[0058] The outer periphery of the sealing cover 3.5 has a connecting wheel 3.9, which is connected to the belt 3.10, and the other end is connected to the power unit 4.

[0059] The main function of the power unit 4 is to drive the filter chamber 3 to rotate intermittently.

[0060] Specific usage plan:

[0061] The wastewater from the cavern with extremely high SS content enters the inner cavity 2.2 through the inlet 12.3 and inlet 22.4. Generally, such projects will set up an equalization tank, mainly because the flow rate of the cavern wastewater is very unstable. The equalization tank is only used for temporary storage.

[0062] The connecting wheel 3.9 on the filter chamber 3 is connected to the power unit 4 via a belt 3.10. When the power unit rotates, it drives the connecting wheel 3.9 to rotate, which in turn drives the filter chamber 3 to rotate together.

[0063] Under the action of the spiral blades 3.6, the suspended solids in the wastewater in the inner cavity 2.2 are dispersed by centrifugal force, while the solid waste in the outer chamber 2, mainly consisting of suspended solids, is distributed on the outer wall 2.1, and the clean water is close to the inner cavity 3.2.

[0064] After the power unit 4 stops, under the action of gravity, the solid waste settles downward along the inner side of the outer wall 2.1 and eventually falls into the internal slag outlet 2.7 of the base 2.5. In addition, some of the solid waste at the bottom is further pushed towards the internal slag outlet 2.7 by the action of the mud guide plate 3.8.

[0065] After a period of settling, the electric switch 2.10 and the slag discharge pump 2.11 are turned on. Under the action of the slag discharge pump 2.11, the solid waste flows through the slag discharge branch pipe 2.8 to the slag discharge main pipe 2.9, and finally flows to the solid waste treatment system. This application does not include the solid waste treatment system.

[0066] Meanwhile, clean water flows through the inlet 3.7 into the clean water cavity 3.2, and a certain amount of common flocculant, such as PAM, is added to the clean water outlet 3.3 to further precipitate it. Finally, the clean water is discharged from the clean water outlet 3.3 through the pipe.

[0067] When the available site for the project is long and narrow and relatively low, and this application cannot be placed upright, it can be laid horizontally, ensuring that the middle side of the two inlet ports (inlet port 12.3 and inlet port 22.4) faces upwards. Other usage methods are the same as above.

[0068] When the SS distribution in the wastewater is extremely complex, this application can be connected in series, with the clean water outlet 3.3 of the first device flowing to the inlet 12.3 and inlet 22.4 of the second device, ensuring that the inlet holes 3.7 of the two devices are different. At the same time, the inlet hole 3.7 of the first device is larger than that of the second device. The specific size can be determined according to the particle size distribution of the water sample. If the particle size distribution is approximately 50% suspended solids larger than 5mm, 45% suspended solids between 1 and 5mm, and the remainder is suspended solids smaller than 1mm, then the inlet hole 3.7 of the first device should preferably be 4.5mm, and the inlet hole 3.7 of the second device should preferably be 0.8mm.

[0069] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wastewater treatment device, comprising an outer wastewater chamber (2), a power unit (4), and an inner filter chamber (3) installed in the inner cavity (2.2) of the outer wastewater chamber (2), wherein the power unit (4) drives the inner filter chamber (3) to rotate, the inner filter chamber (3) has a plurality of water inlet holes (3.7) on its surface, a spiral blade (3.6) is fixed on the surface of the inner filter chamber (3), and a sample inlet is located in the middle of the outer wastewater chamber (2), characterized in that, The distance between the rotating shaft of the spiral blade (3.6) and the inner wall of the wastewater outer chamber (2) is a, and the distance between the outer side of the spiral blade (3.6) and the inner wall of the wastewater outer chamber (2) is (1 / 5~1 / 6)a. The bottom of the filter inner chamber (3) is provided with a bottom slag outlet (2.6), and the clean water outlet (3.3) is located at the top of the filter inner chamber (3).

2. The wastewater treatment device according to claim 1, characterized in that, The wastewater treatment device is installed vertically or horizontally, and the outer wastewater chamber (2) is hexagonal prism in shape.

3. The wastewater treatment device according to claim 1, characterized in that, The wastewater outer chamber (2) is equipped with a base (2.5) at the bottom. The base (2.5) is composed of a vertically arranged outer shell (2.12) and an inner shell (2.13). The top of the base (2.5) is provided with an internal slag outlet (2.7), and the bottom slag outlet (2.6) is opened on the surface of the inner shell (2.13). The internal slag outlet (2.7) and the bottom slag outlet (2.6) are interconnected.

4. The wastewater treatment device according to claim 3, characterized in that, Multiple bottom slag outlets (2.6) are connected to the main slag outlet (2.9) via slag outlet branch pipes (2.8), and the other end of the main slag outlet (2.9) is connected to the slag outlet pump (2.11).

5. The wastewater treatment device according to claim 3, characterized in that, The bottom of the filter chamber (3) is equipped with an inverted frustum-shaped mud guide plate (3.8), the bottom of which is located directly above the internal slag outlet (2.7).

6. The wastewater treatment device according to claim 3, characterized in that, The outer shell (2.12) is a regular hexagonal truncated cone, and the inner shell (2.13) is a truncated cone.

7. The wastewater treatment apparatus according to claim 4, characterized in that, An electric switch (2.10) is installed on the slag discharge main pipe (2.9).

8. The wastewater treatment device according to claim 1, characterized in that, The inlet includes inlet 1 (2.3) and inlet 2 (2.4). Inlet 1 (2.3) and inlet 2 (2.4) are located in the lower half of the wastewater outer chamber (2). The inlet 1 (2.3) and inlet 2 (2.4) are inclined downwards in the direction of water inlet.

9. The wastewater treatment device according to claim 1, characterized in that, The top of the filter chamber (3) is fixed with an upper sealing cover (3.5) with the clean water outlet (3.3) in the middle. A connecting wheel (3.9) is fixed on the outer periphery of the upper sealing cover (3.5). A belt (3.10) is sleeved between the connecting wheel (3.9) and the drive shaft of the power unit (4).

10. A wastewater treatment system, characterized in that, The device is composed of multiple wastewater treatment devices according to any one of claims 1-9 connected in series, wherein the clean water outlet (3.3) of the preceding wastewater treatment device is connected to the sample inlet of the following wastewater treatment device, and the diameter of the water inlet (3.7) of the preceding wastewater treatment device is larger than the diameter of the water inlet (3.7) of the following wastewater treatment device.

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