Tunnel gushing wastewater recycling device

Abstract

The invention relates to a tunnel gushing wastewater recycling device, and belongs to the field of tunnel construction wastewater treatment equipment. Comprising a sedimentation tank, a conveying chain and a scraper, conveying chains are arranged on the front inner side face and the rear inner side face of the sedimentation tank respectively, and rotating shafts are rotationally installed between the two conveying chains and arranged along the conveying chains at intervals; a scraping plate is arranged on the rotating shaft, and filtering holes are formed in the scraping plate; one end of the connecting rod is fixedly connected with the rotating shaft, and the other end of the connecting rod is provided with a second guide wheel; guide grooves are formed in the front inner side wall and the rear inner side wall of the sedimentation tank, and the first guide wheel and the second guide wheel are embedded in the guide grooves; the scraping plate forms a filtering surface after being dumped above the sedimentation tank, wastewater is filtered for the first time, filtered substances can be automatically conveyed out leftwards, sediments in the sedimentation tank are gradually scraped off through the scraping plate in the sedimentation tank, water can automatically flow back into the sedimentation tank in the scraping process, and the sedimentation tank is prevented from being scraped off. Therefore, the water content in the discharged sediment is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction wastewater treatment equipment, and in particular to a tunnel wastewater recycling device. Background Art

[0002] The construction of tunnel projects is likely to have a lot of impacts on the local natural ecological environment, such as environmental pollution, water source pollution, soil erosion, vegetation destruction and other natural ecological problems.

[0003] The main sources of wastewater during tunnel construction are as follows:

[0004] (1) Wastewater generated during tunneling. The external circulating cooling water used in the TBM tunneling process is taken from the nearby river and transported to the TBM equipment through pipelines. The cooling water is directly discharged after heat exchange. The discharged wastewater is mixed with stone powder and is turbid white. In the drilling and blasting method, the water used for dust reduction after tunnel blasting contains a large amount of suspended matter and is discharged.

[0005] (2) Rock fissure water in the tunnel. The fissure water flows through the chemical grouting material and concrete on the tunnel wall and flows into the tunnel drainage ditch. Due to the mixture of grouting material and concrete, the water appears turbid white.

[0006] (3) Water gushing from the water-rich area in the rock contact zone. The water volume is large and the water quality varies according to the geological conditions. At the same time, it washes the tunnel and involves a large amount of suspended matter.

[0007] According to past construction experience, the flow rate of wastewater discharged from tunnels varies greatly, ranging from a few cubic meters per hour to several hundred cubic meters per hour, mainly due to the influence of many factors such as poor geology and tunnel construction progress.

[0008] At present, the most common method of treating wastewater in tunnel construction is to lead the wastewater to a sedimentation tank and let it stay for a certain period of time, waiting for the suspended matter to settle before being discharged. Before the wastewater is introduced into the sedimentation tank, it is generally necessary to use filtering equipment to filter the wastewater once to filter out large debris in the wastewater, such as wood fragments and large stones used in construction, so as to facilitate the treatment of the wastewater in the sedimentation tank. However, the construction site of the tunnel is generally relatively small, and the additional filtering equipment not only increases the overall volume of the device, but also, due to the large volume of these debris, they will quickly clog the filtering device, so that the staff needs to frequently clean the filtering equipment, which is inconvenient to use. Summary of the invention

[0009] In order to solve or partially solve the problems existing in the related art, the present invention provides a tunnel wastewater recycling device, aiming to solve the technical problem that the existing sedimentation tank still needs to be equipped with a filtering device.

[0010] The above-mentioned tunnel wastewater recycling device includes a sedimentation tank, a conveyor chain, and a scraper;

[0011] A conveying chain is respectively arranged on the front and rear inner sides of the sedimentation tank, a rotating shaft is rotatably installed between the two conveying chains, and the rotating shaft is arranged at intervals along the conveying chains; a scraper is arranged on the rotating shaft, and a filter hole is arranged on the scraper; a first guide wheel is rotatably installed on the end of the rotating shaft, one end of a connecting rod is fixedly connected to the rotating shaft, and a second guide wheel is arranged on the other end of the connecting rod; guide grooves are constructed on the front and rear inner side walls of the sedimentation tank, and the first guide wheel and the second guide wheel are embedded in the guide grooves;

[0012] The conveying chain has a first horizontal section and a second horizontal section, the first horizontal section is located at the bottom of the sedimentation tank, the second horizontal section is located above the sedimentation tank, and the left end of the first horizontal section protrudes to the left side compared to the left end of the sedimentation tank, and the right end of the first horizontal section protrudes to the right side compared to the right end of the sedimentation tank;

[0013] The right inner end surface of the sedimentation tank is inclined;

[0014] The scraper is roughly horizontal in the first horizontal section, and is combined to form a filtering surface in the first horizontal section. The conveyor chain drives the scraper to move to the left, and the filtered large debris and stones are discharged outward from the left end of the sedimentation tank; the scraper is vertical in the second horizontal section, and is driven by the conveyor chain to move to the right, and the sediment deposited at the bottom of the sedimentation tank is slowly pushed to the right until the sediment is pushed outward from the right end of the sedimentation tank.

[0015] In some solutions, the scraper has a filtering section and a solid section, and the solid section is arranged away from the rotating shaft.

[0016] In some embodiments, the height of the scraper is greater than the interval between two adjacent scrapers.

[0017] In some solutions, an adjustment block is provided below the right end of the first horizontal section, and a spring is provided below the adjustment block;

[0018] The adjusting block pushes up the passing second guide wheel, thereby pushing the scraper to the left.

[0019] In some embodiments, adsorption baffles are vertically installed in the sedimentation tank, and at least two adsorption baffles are spaced apart from left to right.

[0020] In some embodiments, adsorption branches are arranged on the adsorption partition.

[0021] In some schemes, a clamping strip is provided on the top of the adsorption baffle, and clamping grooves are provided on the front and rear side walls of the sedimentation tank, and the two ends of the clamping strip are placed in the clamping grooves.

[0022] In some schemes, a drug adding rack is provided in the sedimentation tank, and the drug adding rack includes a transverse conduit and a longitudinal conduit, and the transverse conduits and the longitudinal conduits are staggered with each other in a grid shape, and the side wall of each grid is provided with a drug placing hole.

[0023] In some schemes, the overflow pipe of the sedimentation tank is connected to the fine filter tank, and a bearing plate is provided at the bottom of the fine filter tank, and a filter cloth layer, a fine sand layer and a pebble layer are provided on the bearing plate in order from bottom to top;

[0024] A water purification chamber is provided below the bearing plate, a first water outlet pipe is provided on the side wall of the water purification chamber, the first water outlet pipe is connected to the liquid inlet end of the output pump, and a first valve is provided on the first water outlet pipe.

[0025] In some schemes, a second water outlet pipe is also provided on the side wall of the water purification chamber, one end of the second water outlet pipe is connected to the liquid inlet end of the output pump, the other end of the second water outlet pipe is connected to the ceramic filter element arranged in the water purification chamber, and a second valve is provided on the second water outlet pipe.

[0026] The technical solution provided by the present invention may include the following beneficial effects:

[0027] The present application provides a rotatable scraper, which is tilted over the sedimentation tank to form a filtering surface, performs a first filtration on the wastewater, and can automatically transport the filtered material to the left, thereby achieving the purpose of automatic cleaning, and there is no need to set up filtering equipment, which effectively reduces the size of the device; in the sedimentation tank, the sediment in the sedimentation tank is gradually scraped off by the scraper, and the water will automatically flow back into the sedimentation tank during the scraping process, thereby effectively reducing the water content in the discharged sediment and reducing the waste of water resources.

[0028] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0030] Figure 1 1 is a schematic structural diagram of a wastewater recycling device according to an embodiment of the present invention;

[0031] Figure 2is another structural schematic diagram of a wastewater recycling device shown in an embodiment of the present invention;

[0032] Figure 3 It is a schematic diagram of the assembly structure of a scraper and a sedimentation tank of a wastewater recycling device shown in an embodiment of the present invention;

[0033] Figure 4 Schematic diagram of the structure of a scraper of a wastewater recycling device shown in an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of the installation of an adjustment block of a wastewater recycling device shown in an embodiment of the present invention;

[0035] Figure 6 is a schematic diagram of the installation of an adsorption partition of a wastewater recycling device shown in an embodiment of the present invention;

[0036] Figure 7 1 is a schematic diagram of the installation of a dosing rack of a wastewater recycling device according to an embodiment of the present invention;

[0037] Figure 8 Schematic diagram of the installation of a fine filter tank of a wastewater recycling device according to an embodiment of the present invention;

[0038] Reference numerals:

[0039] 1. Sedimentation tank; 101. Guide groove; 102. Clamping groove; 103. Overflow pipe; 2. Conveyor chain; 201. First horizontal section; 202. Second horizontal section; 3. Scraper; 301. Filter hole; 302. Filter section; 303. Solid section; 4. Rotating shaft; 401. First guide wheel; 402. Connecting rod; 403. Second guide wheel; 5. Adjustment block; 6. Spring; 7. Adsorption baffle; 701. Adsorption branches; 702, card strip; 8, dosing rack; 801, horizontal conduit; 802, longitudinal conduit; 803, drug release hole; 9, fine filter tank; 901, support plate; 902, filter cloth layer; 903, fine sand layer; 904, pebble layer; 905, clean water chamber; 906, first water outlet pipe; 907, first valve; 908, second water outlet pipe; 909, second valve; 910, ceramic filter element; 10, output pump. DETAILED DESCRIPTION

[0040] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0041] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0042] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing 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 therefore should not be understood as a limitation on the present invention.

[0043] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Embodiment 1:

[0045] See also Figure 1 , Figure 2 and Figure 3 The present application provides a tunnel wastewater recycling device, comprising a sedimentation tank 1, a conveyor chain 2, and a scraper 3; the sedimentation tank 1 is roughly square and is built on one side of a tunnel construction site. The left and right sides of the sedimentation tank 1 are defined in the direction of the longer side, and the front and back sides of the sedimentation tank 1 are defined in the direction of the shorter side. The projection of the sedimentation tank 1 on the front side is roughly a trapezoid with a narrow lower side and a wide upper side, that is, the right inner end face of the sedimentation tank 1 is inclined.

[0046] A conveying chain 2 is respectively disposed on the front and rear inner sides of the sedimentation tank 1, and a rotating shaft 4 is rotatably mounted between some of the chain links of the two conveying chains 2. Specifically, part of the chain plates extend upward to form a mounting portion, and the end of the rotating shaft 4 is rotatably connected to the mounting portion, so that the rotating shaft 4 will not interfere with the sprocket during rotation of the sprocket. The rotating shaft 4 is arranged at intervals along the conveying chain 2; a scraper 3 is disposed on the rotating shaft 4, and a filter hole 301 is disposed on the scraper 3, and the diameter of the filter hole 301 is greater than 10 mm; a first guide wheel 401 is rotatably mounted on the end of the rotating shaft 4, and a connecting rod 402 is vertically disposed with the rotating shaft 4, one end of the connecting rod 402 is fixedly connected to the rotating shaft 4, and a second guide wheel 403 is disposed on the other end of the connecting rod 402; guide grooves 101 are constructed on the front and rear inner walls of the sedimentation tank 1, and the first guide The wheel 401 and the second guide wheel 403 are embedded in the guide groove 101. In this way, when the conveying chain 2 runs into the sedimentation tank 1, the position of the scraper 3 is limited by the first guide wheel 401, the second guide wheel 403 and the guide groove 101, so that it always remains perpendicular to the guide groove 101, that is, it remains in a vertical state. When the conveying chain 2 leaves the sedimentation tank 1, the scraper 3 is no longer restricted by the guide groove 101, and the scraper 3 tilts to the left, thereby forming a filtering surface in the first horizontal section 201.

[0047] The conveying chain 2 has a first horizontal section 201 and a second horizontal section 202. The conveying chain 2 at the connecting part between the right end of the first horizontal section 201 and the right end of the second horizontal section 202 is parallel to the right inner end surface of the sedimentation tank 1. The first horizontal section 201 is located at the bottom of the sedimentation tank 1, and the second horizontal section 202 is located above the sedimentation tank 1. The left end of the first horizontal section 201 protrudes to the left side compared to the left end of the sedimentation tank 1, and the right end of the first horizontal section 201 protrudes to the right side compared to the right end of the sedimentation tank 1.

[0048] The scraper 3 is in a vertical state in the second horizontal section 202 , and is approximately in a horizontal state in the first horizontal section 201 , and is combined in the first horizontal section 201 to form a filtering surface.

[0049] When the present application is used, the tunnel construction wastewater to be filtered is introduced from the upper left side of the filter surface through a pipeline or a water diversion channel. After passing through the filter surface, large debris and stones in the wastewater are filtered out and remain on the scraper 3 located in the first horizontal section 201. As the conveyor chain 2 moves, the scraper 3 is driven to move to the left, thereby conveying the large debris and stones to the left, and then discharging them outward at the leftmost end of the first horizontal section 201, thereby completing the filtering of large debris in the wastewater.

[0050] After passing through the filtering surface, the remaining wastewater falls downward into the sedimentation tank 1; in the sedimentation tank 1, the fine-grained sand and gravel in the wastewater naturally settle at the bottom of the sedimentation tank 1 and gradually accumulate, and the scraper 3 located in the second horizontal section 202 slowly moves to the right driven by the conveyor chain 2, and gradually pushes the sediment accumulated at the bottom of the sedimentation tank 1 to the right, and after reaching the rightmost side of the first horizontal section 201, the sediment is gradually pushed upward along the right inner end surface of the sedimentation tank 1, and finally the sediment is pushed outward from the right end of the sedimentation tank 1, completing the separation of fine-grained debris in the wastewater.

[0051] The scraper 3 of the present application is poured over the sedimentation tank 1 to form a filtering surface, which performs the first filtration on the wastewater and can automatically transport the filtered material to the left. Compared with the conventional filtration method using a filter plate, the present application does not need to consider the problem of filter plate clogging after long-term use, and does not need to regularly clean, maintain or replace the filter plate, which effectively reduces the cost of primary filtration; in the sedimentation tank 1, the sediment in the sedimentation tank 1 is gradually scraped off by the scraper 3. Compared with the method of extracting by a catheter, the water in the present application will automatically flow back to the sedimentation tank 1 during the scraping process, thereby effectively reducing the water content in the discharged sediment and reducing the waste of water resources; furthermore, the present application can perform primary filtration on the wastewater through a set of scraper 3 systems, and can effectively scrape off the sediment at the bottom of the sedimentation tank 1, effectively reducing the production cost of the device.

[0052] In this embodiment, if Figure 4 As shown, the scraper 3 has a filtering section 302 and a solid section 303, and the solid section 303 is arranged away from the rotating shaft 4. In this way, when the scraper 3 runs to the bottom of the sedimentation tank 1 for scraping, it contacts the sediment through the solid section 303 to prevent the sediment from flowing out of the filter hole 301. At the same time, when the scraper 3 runs to the right inner end surface of the sedimentation tank 1, the water on the scraper 3 can flow out from the filtering section 302, thereby effectively reducing the water content in the sediment scraped by the scraper 3. In this embodiment, the height of the scraper 3 is greater than the interval between two adjacent scrapers 3. In this way, when the scraper 3 runs to the first horizontal section 201, after tilting to the left, the end of the tilted scraper 3 rests on the scraper 3 on its left side, so that the scraper 3 can form a filtering surface in the first horizontal section 201; at the same time, with such a design, the end of the scraper 3 forms a plurality of protrusions on the filtering surface, which is conducive to pushing the filtered material to the left.

[0053] In this embodiment, if Figure 5As shown, an adjustment block 5 is provided below the right end of the first horizontal section 201, and a spring 6 is provided below the adjustment block 5, and the lower end of the spring 6 is fixedly installed on the sedimentation tank 1; when the scraper 3 passes through the adjustment block 5, the first guide wheel 401 first rolls over the adjustment block 5, and the adjustment block 5 bounces upward and resets under the action of the spring 6 after being pressed down, and then the second guide wheel 403 rolls over the adjustment block 5. Since the scraper 3 is rotatably connected to the conveyor chain 2 through the rotating shaft 4, the second guide wheel 403 cannot press the adjustment block 5 downward, but is pushed up, thereby causing the scraper 3 to tilt to the left, and then tilts to the left under the action of the scraper 3's own gravity until its end rests on the scraper 3 on its left side.

[0054] Embodiment 2:

[0055] Based on the first embodiment, in this embodiment, if Figure 6 As shown, an adsorption baffle 7 is vertically installed in the sedimentation tank 1, and at least two adsorption baffles 7 are spaced apart from left to right to effectively adsorb and remove impurities in the sewage. At the same time, the adsorption baffle 7 divides the sedimentation tank 1 into compartments one by one from left to right in sequence to reduce the water flow disturbance between adjacent compartments, thereby effectively improving the sedimentation effect of the sewage in the sedimentation tank 1.

[0056] In this embodiment, adsorption branches 701 are arranged on the adsorption baffle 7, which effectively increases the contact area between the adsorption baffle 7 and the sewage, thereby improving its adsorption capacity. Furthermore, the provision of the adsorption branches 701 further improves the anti-disturbance ability of the baffle, which is beneficial to the precipitation of debris in the sewage.

[0057] In this embodiment, a clamping strip 702 is provided on the top of the adsorption partition 7, and a clamping slot 102 is provided on the front and rear side walls of the sedimentation tank 1. The two ends of the clamping strip 702 are placed in the clamping slot 102, so that the adsorption partition 7 is movably installed in the sedimentation tank 1, and the adsorption partition 7 is easy to remove, so as to facilitate cleaning and maintenance. In some specific embodiments, the clamping slots 102 are evenly spaced along the length direction of the sedimentation tank 1. In this way, the position of the adsorption partition 7 can be adjusted by installing the adsorption partition 7 on different clamping slots 102 to adapt to the use of different sewage, which is conducive to improving the applicability of the device.

[0058] Embodiment three:

[0059] Based on the first or second embodiment, in this embodiment, if Figure 6 and Figure 7As shown, a dosing rack 8 is provided in the sedimentation tank 1. Specifically, the dosing rack 8 is arranged on the leftmost side of the sedimentation tank 1, that is, on the left side of the leftmost adsorption partition 7. The dosing rack 8 includes a transverse duct 801 and a longitudinal duct 802. The transverse duct 801 and the longitudinal duct 802 are staggered in a grid shape, that is, a grid structure is formed one by one. The side wall of each square is provided with a drug release hole 803. The interiors of the transverse duct 801 and the longitudinal duct 802 are interconnected. One end of one of the transverse ducts 801 or the longitudinal duct 802 is connected to a drug storage barrel through a pipeline. The drug storage barrel stores flocculation medicine mixed evenly with clean water. When working, the flocculation medicine in the medicine storage barrel flows into the dosing rack 8, and then is evenly mixed into the wastewater through the medicine release hole 803. With this design, the dosing position is evenly distributed in the sedimentation tank 1, thereby effectively improving the mixing uniformity of the medicine and the wastewater, which is beneficial to the flocculation and precipitation of impurities in the wastewater.

[0060] Embodiment 4:

[0061] Based on Embodiments 1 to 3, in this embodiment, if Figure 8 As shown, the overflow pipe 103 of the sedimentation tank 1 is located on the right side of the sedimentation tank 1, and the overflow pipe 103 of the sedimentation tank 1 is connected to the fine filter tank 9. A bearing plate 901 is provided at the bottom of the fine filter tank 9, and a filter cloth layer 902, a fine sand layer 903 and a pebble layer 904 are provided on the bearing plate 901 from bottom to top; a clean water cavity 905 is provided below the bearing plate 901, and a first water outlet pipe 906 is provided on the side wall of the clean water cavity 905, and the first water outlet pipe 906 is connected to the liquid inlet end of the output pump 10, and a first valve 907 is provided on the first water outlet pipe 906.

[0062] During operation, after flocculation, sedimentation and adsorption in the sedimentation tank 1, the wastewater flows into the fine filter tank 9 through the overflow pipe 103. In the fine filter tank 9, the wastewater is further filtered through the pebble layer 904, the fine sand layer 903 and the filter cloth in turn, effectively filtering out finer impurities in the wastewater to improve the cleanliness of the wastewater after treatment, and then flows into the clean water chamber 905, and finally transported to the required location through the output pump 10 for reuse, avoiding environmental pollution caused by indiscriminate discharge of wastewater and effectively improving the utilization rate of water resources.

[0063] In this embodiment, a second water outlet pipe 908 is further provided on the side wall of the clean water chamber 905, one end of the second water outlet pipe 908 is connected to the liquid inlet end of the output pump 10, and the other end of the second water outlet pipe 908 is connected to a ceramic filter element 910 arranged in the clean water chamber 905. A second valve 909 is provided on the second water outlet pipe 908. In this way, when the waste water to be used again needs to have a higher purity, the first valve 907 can be closed, the valve can be opened, and then the treated water can be filtered again through the ceramic filter element 910. The ceramic filter element 910 can make the filtering effect reach the nanometer level, further improving the filtering effect of sewage.

[0064] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein are selected to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A tunnel wastewater recycling device, characterized by: The invention comprises a sedimentation tank (1), a conveyor chain (2), and a scraper (3); a conveyor chain (2) is respectively arranged on the front and rear inner side surfaces of the sedimentation tank (1); a rotating shaft (4) is rotatably installed between the two conveyor chains (2), and the rotating shaft (4) is arranged at intervals along the conveyor chain (2); a scraper (3) is arranged on the rotating shaft (4), and a filter hole (301) is arranged on the scraper (3); a first guide wheel (401) is rotatably installed at the end of the rotating shaft (4), one end of a connecting rod (402) is fixedly connected to the rotating shaft (4), and the other end of the connecting rod (402) is provided with a second guide wheel (403); guide grooves (101) are constructed on the front and rear inner side walls of the sedimentation tank (1), and the first guide wheel (401) and the second guide wheel (403) are embedded in the guide grooves (101); The conveying chain (2) comprises a first horizontal section (201) and a second horizontal section (202), the first horizontal section (201) being located at the bottom of the sedimentation tank (1), the second horizontal section (202) being located above the sedimentation tank (1), and the left end of the first horizontal section (201) protrudes to the left side compared to the left end of the sedimentation tank (1), and the right end of the first horizontal section (201) protrudes to the right side compared to the right end of the sedimentation tank (1); The right inner end surface of the sedimentation tank (1) is inclined; The scraper (3) is approximately horizontal in the first horizontal section (201) and is combined to form a filtering surface in the first horizontal section (201). The conveyor chain (2) drives the scraper (3) to move to the left, and the filtered large debris and stones are discharged outward from the left end of the sedimentation tank (1); the scraper (3) is vertical in the second horizontal section (202), and is driven by the conveyor chain (2) to move to the right, and the sediment deposited at the bottom of the sedimentation tank (1) is slowly pushed to the right until the sediment is pushed outward from the right end of the sedimentation tank (1).

2. The device for recycling tunnel wastewater according to claim 1, characterized in that: The scraper (3) comprises a filtering section (302) and a solid section (303), and the solid section (303) is arranged away from the rotating shaft (4).

3. The device for recycling tunnel wastewater according to claim 1, characterized in that: The height of the scraper (3) is greater than the interval between two adjacent scrapers (3).

4. The device for recycling tunnel wastewater according to claim 1, characterized in that: An adjustment block (5) is provided below the right end of the first horizontal section (201), and a spring (6) is provided below the adjustment block (5); wherein the adjustment block (5) pushes the passing second guide wheel (403) upwards, thereby pushing the scraper (3) to the left.

5. The device for recycling tunnel wastewater according to claim 1, characterized in that: An adsorption baffle (7) is vertically installed in the sedimentation tank (1), and at least two adsorption baffles (7) are spaced apart from left to right.

6. The device for recycling tunnel wastewater according to claim 5, characterized in that: Adsorption branches (701) are arranged on the adsorption partition (7).

7. The device for recycling tunnel wastewater according to claim 6, characterized in that: A clamping strip (702) is provided on the top of the adsorption baffle (7), and clamping grooves (102) are provided on the front and rear side walls of the sedimentation tank (1), and both ends of the clamping strip (702) are placed in the clamping grooves (102).

8. The device for recycling tunnel wastewater according to claim 1, characterized in that: A drug adding rack (8) is provided in the sedimentation tank (1), and the drug adding rack (8) comprises a transverse conduit (801) and a longitudinal conduit (802), wherein the transverse conduit (801) and the longitudinal conduit (802) are interlaced with each other in a grid shape, and a drug placing hole (803) is provided on the side wall of each grid.

9. The device for recycling tunnel wastewater according to claim 1, characterized in that: The overflow pipe (103) of the sedimentation tank (1) is connected to the fine filter tank (9), the bottom of the fine filter tank (9) is provided with a bearing plate (901), and the bearing plate (901) is provided with a filter cloth layer (902), a fine sand layer (903) and a pebble layer (904) in order from bottom to top; A clean water chamber (905) is provided below the supporting plate (901), a first water outlet pipe (906) is provided on the side wall of the clean water chamber (905), the first water outlet pipe (906) is connected to the liquid inlet end of the output pump (10), and a first valve (907) is provided on the first water outlet pipe (906).

10. The device for recycling tunnel wastewater according to claim 9, characterized in that: A second water outlet pipe (908) is also provided on the side wall of the water purification chamber (905); one end of the second water outlet pipe (908) is connected to the liquid inlet end of the output pump (10); the other end of the second water outlet pipe (908) is connected to a ceramic filter element (910) disposed in the water purification chamber (905); and a second valve (909) is provided on the second water outlet pipe (908).

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