A high-altitude tunnel construction wastewater treatment device

Abstract

The application discloses a high-altitude tunnel construction wastewater treatment device and relates to the technical field of sewage treatment. The high-altitude tunnel construction wastewater treatment device comprises a machine table and a cyclone grit chamber, a coagulation reaction tank, an inclined tube sedimentation tank and a sand filter tank which are sequentially connected to the machine table, so that wastewater can sequentially pass through the cyclone grit chamber, the coagulation reaction tank, the inclined tube sedimentation tank and the sand filter tank. The cyclone grit chamber comprises a water inlet pipe, a cyclone tank, a spiral stirring blade and a driving piece. The water inlet pipe is tangent to and communicates with the outer periphery of the cyclone tank. The spiral stirring blade is arranged in the cyclone tank. The driving piece is connected to the spiral stirring blade and drives the spiral stirring blade to rotate. In the direction of rotation of the spiral stirring blade, the spiral stirring blade extends to the bottom of the cyclone tank. The rotation direction of the spiral stirring blade is the same as the rotation direction of wastewater in the cyclone tank. The rotation speed of the spiral stirring blade is greater than the flow speed of water in the water inlet pipe. The scheme is beneficial to improving the ability of the tunnel construction wastewater treatment device to separate fine particles in wastewater.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and more specifically, to a wastewater treatment device for high-altitude tunnel construction. Background Technology

[0002] Industries such as tunnel construction, mining, and aggregate processing generate large amounts of wastewater containing suspended sand and rock powder. Direct discharge of this wastewater without effective treatment will cause severe wear and tear on subsequent treatment equipment and pollute receiving water bodies. Especially in tunnel construction in high-altitude and frigid regions, such as the lower reaches of the Yarlung Tsangpo River in Tibet, tunnel construction wastewater exhibits the following significant characteristics: First, the concentration of suspended solids is extremely high, and the particles are extremely fine; Second, the water temperature is consistently low. Third, the water quality and quantity fluctuate drastically; Fourth, it has extremely high requirements for ecological and environmental protection.

[0003] Currently, the main treatment process for tunnel construction wastewater is a physicochemical treatment route of "coagulation sedimentation + filtration". A typical treatment process involves wastewater passing through a screen to intercept large floating objects before entering a regulating tank for water quality and quantity equalization. It then sequentially passes through coagulation reaction, sedimentation, and filtration units to remove suspended solids, finally reaching discharge standards or being reused. However, existing tunnel construction wastewater treatment equipment has poor separation capabilities for fine particles when used for treating wastewater from high-altitude tunnel construction. This results in a large amount of sand particles entering the subsequent coagulation sedimentation unit, increasing not only reagent consumption and treatment load but also exacerbating wear and tear on pipelines and equipment. Summary of the Invention

[0004] This invention discloses a wastewater treatment device for high-altitude tunnel construction, which solves the technical problem of poor separation ability of fine particles in the existing technology for tunnel construction wastewater treatment.

[0005] To solve the above problems, the present invention adopts the following technical solution: This application provides an embodiment of a wastewater treatment device for high-altitude tunnel construction. The device includes a machine base and a cyclone grit chamber, a coagulation reaction tank, an inclined tube sedimentation tank, and a sand filter tank, all connected sequentially to the machine base. Wastewater can pass through these components sequentially. The cyclone grit chamber includes an inlet pipe, a cyclone pool, a spiral agitator, and a drive unit. The inlet pipe is tangential to and connected to the outer periphery of the cyclone pool. The spiral agitator is positioned within the cyclone pool. The drive unit is connected to and drives the spiral agitator to rotate. Along the direction of rotation, the spiral agitator extends towards the bottom of the cyclone pool. The rotation direction of the spiral agitator is the same as the rotation direction of the wastewater within the cyclone pool, and the rotation speed of the spiral agitator is greater than the water flow velocity in the inlet pipe.

[0006] In some designs, the cyclone separator also includes a first guide plate, which is vertically disposed in the spiral mixing blade and fixedly connected to the spiral mixing blade. The first guide plate is inclined in the direction of rotation of the spiral mixing blade along the radial direction inward of the spiral mixing blade.

[0007] In some designs, the cyclone separator includes multiple first guide plates, which are spaced apart and evenly distributed along the inner circumference of the spiral mixing blades.

[0008] In some designs, the cyclone sand separator also includes an agitator shaft, multiple drive rods, and multiple mounting rings. The mounting rings are fitted onto the agitator shaft and are spaced apart along the shaft. The inner diameter of the mounting rings is larger than that of the agitator shaft, and each mounting ring is fixedly connected to the agitator shaft via a drive rod. The side of the first guide plate away from the spiral agitator blades is fixedly connected to the mounting ring.

[0009] In some designs, the cyclone grit chamber also includes an outlet pipe and a guide tube, with at least a portion of the guide tube located within the spiral agitator blades. The outlet pipe is connected to the guide tube, and the vertical height of the outlet pipe is greater than that of the inlet pipe. The vertical height of the bottom of the guide tube is less than that of the inlet pipe.

[0010] In some designs, the guide tube includes multiple second guide vanes, which are spaced apart and evenly distributed along the inner circumference of the spiral stirring blade. An overflow bevel is formed between two adjacent second guide vanes. The direction of the overflow bevel is opposite to the direction of rotation of the spiral stirring blade in the radial direction inward.

[0011] In some schemes, the coagulation reaction tank is located adjacent to the inclined tube sedimentation tank, and the coagulation reaction tank and the inclined tube sedimentation tank are separated by a first common wall panel, and the bottom of the coagulation reaction tank is connected to the bottom of the inclined tube sedimentation tank.

[0012] In some schemes, the wastewater treatment device for high-altitude tunnel construction also includes a sand-water separator, which is connected to the bottom of the cyclone pool, and the outlet of the sand-water separator is connected to the coagulation reaction tank.

[0013] In some schemes, the wastewater treatment device for high-altitude tunnel construction also includes a water collection tank, which is separated from the inclined tube sedimentation tank by a second common wall panel. An overflow port is formed on the top of the second common wall panel, and the wastewater in the upper part of the inclined tube sedimentation tank can enter the water collection tank from the overflow port.

[0014] In some designs, the inlet pipe of the sand filter tank is connected to the collection tank, and the cyclone sand separator, coagulation reaction tank and / or inclined tube sedimentation tank are equipped with cleaning pipes, and the outlet pipe of the sand filter tank is connected to the cleaning pipes.

[0015] The technical solution adopted in this invention can achieve the following beneficial effects: The high-altitude tunnel construction wastewater treatment device provided in this application is applicable to tunnel construction in high-altitude and cold regions. Specifically, in the process of treating tunnel construction wastewater, the wastewater first passes through a cyclone grit chamber, which effectively separates finer particles from the wastewater. This reduces the treatment load in the subsequent coagulation and sedimentation stages, decreases the consumption of coagulants, and helps reduce sand particles entering the subsequent coagulation reaction tank and inclined tube sedimentation tank, thus reducing wear on pipes and equipment. Furthermore, the cyclone grit chamber, coagulation reaction tank, inclined tube sedimentation tank, and sand filter tank are all integrated into the machine, facilitating rapid relocation as the tunnel construction progresses.

[0016] In the high-altitude tunnel construction wastewater treatment device provided in this application, the spiral stirring blades are beneficial for promoting the sedimentation of particulate matter in the wastewater, improving sedimentation efficiency, shortening the separation path, and thus reducing the height of the cyclone separator. Furthermore, the spiral stirring blades can guide the flow path of the wastewater within the cyclone pool, thereby helping to establish an orderly flow field within the cyclone pool, suppressing short-circuit flow, and facilitating the full separation of fine particles from the wastewater under centrifugal force. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram from a first-view perspective of a wastewater treatment device for high-altitude tunnel construction provided in some embodiments of this application; Figure 2 This is a top view of a cyclone separator provided in some embodiments of this application; Figure 3 This is an internal schematic diagram of a cyclone separator provided in some embodiments of this application; Figure 4 This is an assembly diagram of the spiral stirring blade and stirring shaft provided in some embodiments of this application; Figure 5 This is a schematic diagram from a second perspective of some embodiments of the wastewater treatment device for high-altitude tunnel construction provided in this application; Figure 6 This is a top view of a wastewater treatment device for high-altitude tunnel construction provided in some embodiments of this application.

[0019] Explanation of reference numerals in the attached figures: 100 - Machine base; 200 - Cyclone grit chamber; 210 - Inlet pipe; 220 - Cyclone pool; 230 - Spiral agitator blade; 240 - Drive component; 250 - First guide plate; 260 - Agitator shaft; 270 - Transmission rod; 280 - Mounting ring; 290 - Outlet pipe; 2100 - Guide cylinder; 2101 - Second guide vane; 2102 - Overflow bevel; 2110 - Reinforcing structural component; 300 - Coagulation reaction tank; 310 - First common wall panel; 400 - Inclined tube sedimentation tank; 401 - Overflow port; 410 - Second common wall panel; 420 - Cleaning pipeline; 500 - Sand filter tank; 600 - Sand-water separator; 700 - Water collection tank. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0021] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that these numbers used to distinguish similar objects can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0022] The following is in conjunction with the appendix Figures 1 to 6 The wastewater treatment device for high-altitude tunnel construction provided in this application will be described in detail through specific embodiments and application scenarios.

[0023] The high-altitude tunnel construction wastewater treatment device provided in this application is suitable for treating wastewater with high suspended concentration, fine particles, and low water temperature.

[0024] Reference Figure 1 The wastewater treatment device for high-altitude tunnel construction provided in this application includes a machine base 100 and a cyclone sedimentation tank 200, a coagulation reaction tank 300, an inclined tube sedimentation tank 400 and a sand filter tank 500 arranged on the machine base 100 and connected in sequence, so that the wastewater can pass through the cyclone sedimentation tank 200, the coagulation reaction tank 300, the inclined tube sedimentation tank 400 and the sand filter tank 500 in sequence.

[0025] Specifically, the wastewater first passes through the cyclone grit chamber 200, which effectively separates finer particles from the wastewater. This reduces the treatment load and coagulation agent consumption in the subsequent coagulation and sedimentation stages. It also helps reduce the amount of sand particles entering the subsequent coagulation reaction tank 300 and inclined tube sedimentation tank 400, thus reducing wear on pipes and equipment. Furthermore, the cyclone grit chamber 200, coagulation reaction tank 300, inclined tube sedimentation tank 400, and sand filter tank 500 are all integrated into the machine base 100, facilitating rapid relocation as the tunnel construction progresses.

[0026] Reference Figure 2 and Figure 3 In some embodiments, the cyclone grit chamber 200 includes an inlet pipe 210, a cyclone pool 220, a spiral agitator 230, and a drive unit 240. The inlet pipe 210 is tangential to and communicates with the outer periphery of the cyclone pool 220. The spiral agitator 230 is disposed in the cyclone pool 220. The drive unit 240 is connected to the spiral agitator 230 and drives the spiral agitator 230 to rotate. Along the direction of rotation of the spiral agitator 230, the spiral agitator 230 extends towards the bottom of the cyclone pool 220. The rotation direction of the spiral agitator 230 is the same as the rotation direction of the wastewater in the cyclone pool 220, and the rotation speed of the spiral agitator 230 is greater than the water flow velocity in the inlet pipe 210.

[0027] In the above embodiments, on the one hand, the spiral stirring blades 230 are beneficial for promoting the sedimentation of particulate matter in wastewater, improving sedimentation efficiency, shortening the separation path, and thus reducing the height of the cyclone separator 200, facilitating the relocation and transportation of the wastewater treatment device for high-altitude tunnel construction. On the other hand, the spiral stirring blades 230 can also guide the flow path of wastewater in the cyclone pool 220, thereby helping to establish an orderly flow field in the cyclone pool 220, suppressing short-circuit flow, so as to facilitate the full separation of fine particles from wastewater under the action of centrifugal force.

[0028] In some embodiments, the rotation speed of the spiral stirring blades 230 can be adjusted according to changes in wastewater quality and quantity to adapt to fluctuations in water quality and quantity.

[0029] For example, with a constant water volume, the worse the water quality, the higher the rotational speed of the spiral agitator 230, meaning the rotational speed of the spiral agitator 230 is closer to its maximum permissible rotational speed. For example, the spiral agitator 230 can be driven by a variable frequency speed-regulating motor. For example, the rotational speed of the spiral agitator 230 can be controlled based on online monitoring data of the incoming water to achieve adaptive adjustment of its rotational speed. Specifically, once the rotational speed of the spiral agitator 230 reaches its maximum permissible rotational speed, the rotational speed of the spiral agitator 230 will not increase further. Specifically, the maximum rotational speed of the spiral agitator 230 can be determined through computational fluid dynamics simulation or on-site debugging; therefore, this embodiment does not limit the maximum rotational speed of the spiral agitator 230.

[0030] In some embodiments, with the water quality remaining constant, the greater the water flow rate, the greater the rotational speed of the spiral stirring blade 230, meaning the rotational speed of the spiral stirring blade 230 is closer to the maximum allowable rotational speed. Since the rotational speed of the spiral stirring blade 230 is greater than the water flow velocity in the inlet pipe 210, the spiral stirring blade 230 can further enhance the swirling effect even with a smaller water flow rate.

[0031] Reference Figures 2 to 4 In some embodiments, the cyclone separator 200 further includes a first guide plate 250, which is vertically disposed within the spiral stirring blade 230 and fixedly connected to it. Along the radial direction inward of the spiral stirring blade 230, the first guide plate 250 is inclined toward the direction of rotation of the spiral stirring blade 230, that is, along the direction of rotation of the spiral stirring blade 230, the first guide plate 250 is inclined toward the center of the spiral stirring blade 230.

[0032] In the above embodiment, the first guide plate 250 can force the water flow outward, while the central open area generates a low-pressure effect due to the water flow being drawn away, naturally drawing water from the bottom to replenish it. This forms a dual-zone flow field with a rapidly downward spiral flow in the outer ring and an upward flow in the center, avoiding disordered turbulence throughout the entire pool. This embodiment is beneficial for the rapid settling of fine sand particles and also helps to prevent the settled sand particles from being rolled up.

[0033] Reference Figure 2In some embodiments, the inner diameter of the spiral stirring blade 230 is greater than the radial width of the first guide plate 250 of the spiral stirring blade 230. The inner diameter of the spiral stirring blade 230 is the radius corresponding to the open area at the center of the spiral stirring blade 230. For example, the radial width of the first guide plate 250 of the spiral stirring blade 230 is less than half the inner diameter of the spiral stirring blade 230. Optionally, the radial width of the first guide plate 250 of the spiral stirring blade 230 is greater than one-quarter of the inner diameter of the spiral stirring blade 230.

[0034] The above embodiment can form a columnar open space within the spiral stirring blade 230, extending outward from the axis and with a radius exceeding half the inner diameter of the spiral stirring blade 230, free from blade interference. This embodiment is beneficial for enhancing the function of external swirling separation of sand particles, while forming a relatively stable flow field in the central region of the spiral stirring blade 230, which helps to prevent the settled sand particles from being rolled up.

[0035] In some embodiments, the bottom of the spiral stirring blade 230 extends at least partially beyond the first guide plate 250, meaning that the first guide plate 250 is not provided within a section of the spiral stirring blade 230 near the bottom of the cyclone pool 220. Specifically, the portion of the bottom of the spiral stirring blade 230 extending beyond the first guide plate 250 can be connected and fixed using angle steel or steel pipe with a narrow width. This allows for the formation of a larger diameter central open area at the bottom of the spiral stirring blade 230.

[0036] This embodiment helps to reduce the disturbance of the first guide plate 250 to the bottom of the vortex pool 220, thereby helping to prevent the settled sand particles from being rolled up.

[0037] Reference Figure 2 In some embodiments, the cyclone separator 200 includes a plurality of first guide plates 250, which are spaced apart and evenly distributed along the inner circumference of the helical agitator 230. In some embodiments, along the helical direction of the helical agitator 230, two adjacent first guide plates 250 at least partially overlap radially with each other. This embodiment is beneficial in preventing sand particles from entering the central open area through the gap between two adjacent helical agitator blades 230.

[0038] Reference Figure 2 and Figure 3 In some embodiments, the cyclone sand separator 200 further includes a stirring shaft 260, multiple drive rods 270, and multiple mounting rings 280. The mounting rings 280 are sleeved on the stirring shaft 260 and are spaced apart along the stirring shaft 260. The inner diameter of the mounting rings 280 is larger than that of the stirring shaft 260, and each mounting ring 280 is fixedly connected to the stirring shaft 260 through the drive rods 270. The side of the first guide plate 250 away from the spiral stirring blades 230 is fixedly connected to the mounting rings 280.

[0039] In the above embodiments, the mounting ring 280 can be used to fix the inner side of the first guide plate 250, and the spiral stirring blade 230 can be used to fix the outer side of the first guide plate 250, thereby fixing the first guide plate 250. In some embodiments, a reinforcing structural member 2110 is also provided between the spiral stirring blade 230 and the mounting ring 280. For example, the reinforcing structural member 2110 can be a rod-shaped structure. Optionally, a triangular support structure is formed between the reinforcing structural member, the first guide plate 250, and the spiral stirring blade 230 to improve the torsional strength of the spiral stirring blade 230 and the first guide plate 250.

[0040] Reference Figure 3 In some embodiments, the cyclone grit chamber 200 further includes an outlet pipe 290 and a guide tube 2100. At least a portion of the guide tube 2100 is located within the spiral agitator blades 230. The outlet pipe 290 communicates with the guide tube 2100, and the vertical height of the outlet pipe 290 is greater than the vertical height of the inlet pipe 210. The vertical height of the bottom of the guide tube 2100 is less than the vertical height of the inlet pipe 210, i.e., the bottom of the guide tube 2100 is lower than the vertical height of the inlet pipe 210.

[0041] In the above embodiment, the vertical height of the outlet pipe 290 is greater than that of the inlet pipe 210. This helps to prevent the wastewater entering the vortex pool 220 from flowing directly out of the outlet pipe 290 without undergoing centrifugal separation, thereby helping to ensure the stability of the water quality of the wastewater discharged from the outlet pipe 290.

[0042] The guide tube 2100 helps guide the bottom backflow of clean water to rise, prevents the formation of flow dead zones in the central area, isolates the central area from the water inlet area, helps prevent the formation of short-circuit flow, and avoids direct short-flow from the outlet pipe 290 without undergoing centrifugal separation process.

[0043] Reference Figure 2 In some embodiments, the guide tube 2100 includes a plurality of second guide vanes 2101, which are spaced apart and evenly distributed along the inner circumference of the spiral stirring blade 230, and an overflow bevel 2102 is formed between two adjacent second guide vanes 2101. The guiding direction of the overflow bevel 2102 is opposite to the rotation direction of the spiral stirring blade 230 in the radial direction inward along the spiral stirring blade 230.

[0044] In the above embodiment, the guide tube 2100 is a static component and does not consume additional power. Furthermore, the multiple second guide vanes 2101 are spaced apart, which is beneficial for the centrifugal movement of sand particles and improves sand particle separation efficiency.

[0045] Reference Figure 2In some embodiments, along the helical direction of the helical stirring blade 230, two adjacent second guide vanes 2101 at least partially overlap radially between the two adjacent helical stirring blades 230. This embodiment is beneficial in preventing sand particles from entering the central open area along the gap between the two adjacent helical stirring blades 230.

[0046] Reference Figure 5 and Figure 6 In some embodiments, the coagulation reaction tank 300 is located adjacent to the inclined tube sedimentation tank 400, and the coagulation reaction tank 300 and the inclined tube sedimentation tank 400 are separated by a first common wall plate 310, and the bottom of the coagulation reaction tank 300 is connected to the bottom of the inclined tube sedimentation tank 400.

[0047] The coagulation reaction tank 300 and the inclined tube sedimentation tank 400 share a first common wall panel 310, which helps to reduce the flow path of the wastewater after coagulation, thereby effectively preventing the suspended solids formed after coagulation from dispersing. In addition, the sharing of the first common wall panel 310 between the coagulation reaction tank 300 and the inclined tube sedimentation tank 400 also helps to improve the compactness of the arrangement of the coagulation reaction tank 300 and the inclined tube sedimentation tank 400, reducing the overall volume of the wastewater treatment device for high-altitude tunnel construction, so as to facilitate the relocation and transportation of the wastewater treatment device for high-altitude tunnel construction.

[0048] In addition, the bottom of the coagulation reaction tank 300 is connected to the bottom of the inclined tube sedimentation tank 400, which helps prevent floc breakage. Optionally, the inclined tube assembly of the inclined tube sedimentation tank 400 is installed in the upper middle part to form a water distribution zone and a sludge settling zone in the lower part. After the wastewater undergoes coagulation reaction in the coagulation reaction tank 300, it enters the inclined tube sedimentation tank 400 from the bottom. The water flows from bottom to top through the inclined tube assembly. During this upward process, the flocs are deposited on the inclined tube assembly and slide down the tube wall to the sludge hopper at the bottom of the tank. The bottom-in, top-out flow direction of this embodiment helps to make full use of the entire effective volume of the inclined tube sedimentation tank 400, reduce the volume of the wastewater treatment device for high-altitude tunnel construction, and facilitate the relocation and transportation of the wastewater treatment device for high-altitude tunnel construction.

[0049] Reference Figure 5 and Figure 6 In some embodiments, the wastewater treatment device for high-altitude tunnel construction also includes a sand-water separator 600, which is connected to the bottom of the cyclone pool 220 and the outlet of the sand-water separator 600 is connected to the coagulation reaction tank 300.

[0050] During operation, the cyclone grit chamber 200 needs to periodically or continuously discharge the sand particles deposited in the sand collection hopper at the bottom of the cyclone pool 220. Specifically, the sand discharged from the sand collection hopper at the bottom of the cyclone pool 220 is not dry sand, but a mixture of sand particles, water, and a small amount of residual organic matter, which usually has a high water content and is in a flowing state. Directly transporting and disposing of this mixture is costly and polluting. In the above embodiment, the sand-water separator 600 can separate the sand particles discharged from the sand collection hopper at the bottom of the cyclone pool 220 to reduce the water content of the sand particles. The separated wastewater is similar in quality to the wastewater discharged from the outlet pipe 290 of the cyclone grit chamber 200, and can then be directly fed into the coagulation reaction tank 300 for treatment. The sand-water separator 600 can significantly reduce the water content of the sand particles, reduce the amount of wastewater to be transported, and facilitate transportation and storage.

[0051] Reference Figure 5 and Figure 6 In some embodiments, the wastewater treatment device for high-altitude tunnel construction also includes a collection tank 700. The collection tank 700 and the inclined tube sedimentation tank 400 are separated by a second common wall panel 410. An overflow port 401 is formed on the top of the second common wall panel 410, and the wastewater in the upper part of the inclined tube sedimentation tank 400 can enter the collection tank 700 from the overflow port 401.

[0052] In some embodiments, the inlet pipe of the sand filter tank 500 is connected to the collection tank 700. The cyclone sand separator 200, the coagulation reaction tank 300, and / or the inclined tube sedimentation tank 400 are provided with cleaning pipes 420. At least one branch of the outlet pipe of the sand filter tank 500 is connected to the cleaning pipe 420, i.e., connected.

[0053] For example, wastewater in the collection tank 700 can be pressurized by a water pump and then enter the sand filter tank 500. In some implementations, the operating pressure of the sand filter tank 500 is 0.3 MPa to 0.6 MPa. For example, the design filtration rate of the sand filter tank 500 is 10 m / h to 15 m / h.

[0054] In some embodiments, during normal filtration in the sand filter tank 500, a water pump draws water from the collection tank 700 and delivers it into the sand filter tank 500. The inclined tube sedimentation tank 400 continuously produces water, and the supernatant overflows uninterruptedly into the collection tank 700, maintaining a dynamic equilibrium in the liquid level within the collection tank 700. During backwashing of the sand filter tank 500, filtration is paused, but the effluent from the inclined tube sedimentation tank 400 continues to flow into the collection tank 700 for temporary storage, causing a temporary rise in the liquid level within the collection tank 700. After the backwashing of the sand filter tank 500 is completed, the wastewater temporarily stored in the collection tank 700 is then filtered again by the sand filter tank 500.

[0055] In some embodiments, when it is necessary to clean the cyclone grit chamber 200, the coagulation reaction tank 300, and / or the inclined tube sedimentation tank 400, sufficient wastewater can be stored in the collection tank 700 before shutting down the cyclone grit chamber 200, the coagulation reaction tank 300, and / or the inclined tube sedimentation tank 400. Further, water is pumped from the collection tank 700 into the sand filter tank 500, so that the filtered water discharged from the sand filter tank 500 can be piped to the cyclone grit chamber 200, the coagulation reaction tank 300, and / or the inclined tube sedimentation tank 400 for cleaning.

[0056] Reference Figure 5 and Figure 6 In some optional embodiments, the cyclone grit chamber 200, the coagulation reaction tank 300, and the inclined tube sedimentation tank 400 are arranged along a first direction. The cyclone grit chamber 200, the sand filter tank 500, and the water collection tank 700 are located on the same side of the inclined tube sedimentation tank 400, and are arranged sequentially along the first direction. This embodiment is beneficial for reducing the length of the wastewater treatment device for high-altitude tunnel construction, and can also reduce the length of wastewater delivery pipelines and cleaning pipelines, thus improving the compactness of the wastewater treatment device.

[0057] Reference Figure 5 and Figure 6 In some embodiments, the wastewater treatment device for high-altitude tunnel construction includes three sand filter tanks 500. Optionally, the three sand filter tanks 500 are arranged in parallel, and the three sand filter tanks 500 are arranged sequentially along a first direction on the machine base 100. For example, the operating state of the sand filter tanks 500 can be adjusted according to fluctuations in the wastewater volume. Specifically, when the wastewater volume is large, a larger number of sand filter tanks 500 can be selected to operate. When the wastewater volume is small, a smaller number of sand filter tanks 500 can be selected to operate.

[0058] In some embodiments, when backwashing of the sand filter tank 500 is required, the sand filter tanks 500 can be backwashed sequentially. For example, one sand filter tank 500 can be backwashed while the other two sand filter tanks 500 remain in operation, and all sand filter tanks 500 can be backwashed sequentially.

[0059] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A wastewater treatment device for high-altitude tunnel construction, characterized in that, It includes a machine base (100) and a cyclone grit chamber (200), a coagulation reaction tank (300), an inclined tube sedimentation tank (400) and a sand filter tank (500) arranged on the machine base (100) and connected in sequence, so that wastewater passes through the cyclone grit chamber (200), the coagulation reaction tank (300), the inclined tube sedimentation tank (400) and the sand filter tank (500) in sequence; The cyclone grit chamber (200) includes an inlet pipe (210), a cyclone pool (220), a spiral stirring blade (230), a driving component (240), and a first guide plate (250). The inlet pipe (210) is tangential to and connected to the outer periphery of the cyclone pool (220). The spiral stirring blade (230) is disposed in the cyclone pool (220). The driving component (240) is connected to the spiral stirring blade (230) and drives the spiral stirring blade (230) to rotate. Along the direction of rotation of the spiral stirring blade (230), the spiral stirring blade (230) extends towards the bottom of the cyclone pool (220). The rotation direction of the spiral stirring blade (230) is the same as the rotation direction of the wastewater in the cyclone pool (220). The first guide plate (250) is vertically disposed in the spiral stirring blade (230) and fixedly connected to the spiral stirring blade (230). Along the radial direction of the spiral stirring blade (230), the first guide plate (250) is inclined in the direction of rotation of the spiral stirring blade (230).

2. The wastewater treatment device for high-altitude tunnel construction according to claim 1, characterized in that, The cyclone separator (200) includes a plurality of first guide plates (250), and the first guide plates (250) are spaced apart and evenly distributed along the inner circumference of the spiral stirring blades (230).

3. The wastewater treatment device for high-altitude tunnel construction according to claim 2, characterized in that, The cyclone sedimentation tank (200) further includes a stirring shaft (260), multiple transmission rods (270), and multiple mounting rings (280). The mounting rings (280) are sleeved on the stirring shaft (260) and are spaced apart along the stirring shaft (260). The inner diameter of the mounting rings (280) is larger than that of the stirring shaft (260), and each mounting ring (280) is fixedly connected to the stirring shaft (260) through the transmission rods (270). The side of the first guide plate (250) away from the spiral stirring blades (230) is fixedly connected to the mounting rings (280).

4. The high-altitude tunnel construction wastewater treatment device according to any one of claims 1 to 3, characterized in that, The cyclone sand separator (200) further includes an outlet pipe (290) and a guide tube (2100). At least a portion of the guide tube (2100) is located in the spiral stirring blade (230). The outlet pipe (290) is connected to the guide tube (2100), and the vertical height of the outlet pipe (290) is greater than the vertical height of the inlet pipe (210). The vertical height of the bottom of the guide tube (2100) is less than the vertical height of the inlet pipe (210).

5. The wastewater treatment device for high-altitude tunnel construction according to claim 4, characterized in that, The guide tube (2100) includes a plurality of second guide vanes (2101), which are spaced apart and evenly distributed along the inner circumference of the spiral stirring blade (230), and an overflow bevel (2102) is formed between two adjacent second guide vanes (2101). The flow direction of the overflow bevel (2102) is opposite to the rotation direction of the spiral stirring blade (230) in the radial direction inward of the spiral stirring blade (230).

6. The wastewater treatment device for high-altitude tunnel construction according to claim 5, characterized in that, The coagulation reaction tank (300) is located adjacent to the inclined tube sedimentation tank (400), and the coagulation reaction tank (300) and the inclined tube sedimentation tank (400) are separated by a first common wall panel (310). The bottom of the coagulation reaction tank (300) is connected to the bottom of the inclined tube sedimentation tank (400).

7. The wastewater treatment device for high-altitude tunnel construction according to claim 6, characterized in that, It also includes a sand-water separator (600), which is connected to the bottom of the vortex tank (220), and the outlet of the sand-water separator (600) is connected to the coagulation reaction tank (300).

8. The wastewater treatment device for high-altitude tunnel construction according to claim 6, characterized in that, It also includes a water collection tank (700), which is separated from the inclined tube sedimentation tank (400) by a second common wall panel (410). An overflow port (401) is formed on the top of the second common wall panel (410), and the wastewater in the upper part of the inclined tube sedimentation tank (400) enters the water collection tank (700) from the overflow port (401).

9. The wastewater treatment device for high-altitude tunnel construction according to claim 8, characterized in that, The inlet pipe of the sand filter tank (500) is connected to the water collection tank (700). The cyclone grit chamber (200), coagulation reaction tank (300) and / or the inclined tube sedimentation tank (400) are provided with cleaning pipelines (420), and at least one branch of the outlet pipeline of the sand filter tank (500) is connected to the cleaning pipeline (420).

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