A device for recycling concrete production wastewater

Abstract

This application relates to a wastewater reuse device for concrete production, belonging to the field of concrete production technology. It includes a sedimentation tank for introducing wastewater and a reaction tank for acidifying the wastewater. The sedimentation tank and the reaction tank are connected. An inlet pipe is installed on the side wall of the sedimentation tank near the bottom wall, connecting to the bottom of the sedimentation tank. Multiple inlet holes are provided on the inlet pipe facing the bottom of the sedimentation tank. A baffle is installed inside the sedimentation tank, located above the inlet pipe and dividing the sedimentation tank into a sedimentation section and a water conveying section. Multiple conveying holes are provided on the baffle, and the sedimentation section and the water conveying section are connected through the conveying holes. A material adding device is installed in the reaction tank for adding acidic solution to the wastewater to neutralize alkaline solutions in the wastewater. This application has the effect of reducing production costs for enterprises.

Description

Technical Field

[0001] This application relates to the field of concrete production technology, and in particular to a device for reusing concrete production wastewater. Background Technology

[0002] Concrete is a general term for engineering composite materials that bind aggregates together with cementing materials. Generally, the term "concrete" refers to cement concrete, also known as ordinary concrete, which uses cement as the cementing material, sand and gravel as aggregates, and water (which may contain admixtures and additives) in a certain proportion, and is widely used in civil engineering. In recent years, with the continuous acceleration of urbanization in my country, the concrete industry has flourished. The concrete production process generates a large amount of wastewater and waste residue. Producing 1 cubic meter of concrete requires 0.17 tons of clean water, with an average production wastewater and waste slurry of 0.03 tons. my country's annual concrete production exceeds 1.5 billion cubic meters; based on this, the annual wastewater and waste slurry generated in my country is as high as 0.5 billion tons. The main sources of wastewater from concrete production are: wastewater from the separation of waste concrete, washing water from production and transportation equipment, and flushing water from the production site.

[0003] However, the wastewater generated during concrete production is often disposed of directly, which reduces resource utilization and increases production costs for enterprises. Summary of the Invention

[0004] To reduce the production costs of enterprises, this application provides a device for reusing concrete production wastewater.

[0005] The concrete production wastewater reuse device provided in this application adopts the following technical solution:

[0006] A device for reusing concrete production wastewater includes a sedimentation tank through which wastewater is introduced and a reaction tank for acidifying the wastewater. The sedimentation tank is connected to the reaction tank. An inlet pipe is installed on the side wall of the sedimentation tank near the bottom wall, and the inlet pipe is connected to the bottom of the sedimentation tank. The inlet pipe has multiple inlet holes facing the bottom of the sedimentation tank. A baffle is installed inside the sedimentation tank, located above the inlet pipe and dividing the sedimentation tank into a sedimentation section and a water conveying section. The baffle has multiple conveying holes, and the sedimentation section and the water conveying section are connected through the conveying holes. A material adding device is installed in the reaction tank for adding an acidic solution to the wastewater to neutralize the alkaline solution in the wastewater.

[0007] Optionally, the axis of the conveying hole is curved, and the openings at both ends of the conveying hole are located on the two surfaces of the partition.

[0008] Optionally, the conveying holes are evenly arranged on the partition plate, the partition plate includes multiple plates, the plates are spliced ​​together in a horizontal plane to form a partition plate, and conveying grooves are opened on the splicing surfaces on both sides of the plates. After adjacent plates are spliced ​​together, the conveying grooves on the splicing surfaces of the plates are spliced ​​together to form conveying holes.

[0009] Optionally, a connecting pipe is provided between the sedimentation tank and the reaction tank. The connecting pipe is U-shaped and includes a first pipe body and a second pipe body located on both sides of the first pipe body and interconnected with each other. The two second pipe bodies are respectively connected to the sedimentation tank and the reaction tank. A third pipe body is connected to the first pipe body. A filter screen is installed in the first pipe body. After the wastewater transported into the second pipe body enters the first pipe body, the filter screen filters the aggregate and sand. The filtered aggregate and sand fall into the third pipe body.

[0010] Optionally, both the first and third pipes have rectangular cross-sections. The filter screen is inclinedly disposed within the first pipe, with one side of the filter screen located within the first pipe and the other side located within the third pipe. The horizontal sides of the filter screen abut against the side walls of the first and third pipes, respectively. The vertical sides of the filter screen are the top wall of the first pipe and the side wall of the third pipe, respectively. The water flow impact surface of the filter screen faces away from the reaction tank and is inclined downwards.

[0011] Optionally, the filter screen is rotatably disposed within the first pipe body, and the rotation axis of the filter screen is parallel to the bottom surface of the first pipe body and perpendicular to the axial direction of the first pipe body; the wastewater reuse device further includes a first quick-connect pipe disposed on the second pipe body and a second quick-connect pipe disposed on the sedimentation tank and the reaction tank respectively, and the first quick-connect pipe and the second quick-connect pipe are plugged into each other.

[0012] Optionally, the filter screen includes a filter screen frame, a filter screen part disposed within the filter screen frame, and an extension frame slidably disposed on both vertical sides of the filter screen frame. The lateral sides of the extension frame abut against the top wall of the first tube and the side wall of the third tube, respectively. The extension frame is slidably engaged with the filter screen frame and slides along the height direction of the filter screen frame. A support spring is disposed inside the extension frame, with one end of the support spring disposed on the extension frame and the other end disposed on the filter screen frame. The support spring drives the extension frame to abut against the corresponding first and third tubes.

[0013] Optionally, the end of the connecting frame away from the filter frame is provided with a boss, both sides of which abut against the transverse sidewalls of the corresponding first and third tubes. The boss is arc-shaped, and the arc surface of the boss abuts against the top wall of the corresponding first tube and the sidewall of the corresponding third tube.

[0014] Optionally, the material adding device includes a material box disposed at the top of the reaction tank, a feed pipe disposed at the bottom of the material box, the feed pipe extending into the reaction tank, and multiple discharge holes disposed on the feed pipe, the discharge holes being evenly arranged along the length of the feed pipe; the material adding device also includes a sealing pipe coaxially disposed within the feed pipe, the sealing pipe being hollow and having multiple feeding ports, the sealing pipe communicating with the material box, the feeding ports corresponding one-to-one with the discharge holes, the feed pipe being rotatably disposed within the reaction tank, and a driving component disposed within the reaction tank for driving the feed pipe to rotate, thereby connecting the discharge holes and the feeding ports, and thereby delivering the acidic solution into the reaction tank.

[0015] Optionally, the feed pipe is provided with multiple stirring plates, which are evenly arranged along the length and circumference of the feed pipe and staggered with the discharge hole.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. During wastewater recycling, wastewater is fed into a sedimentation tank for initial settling. The wastewater is then continuously fed in at a controlled rate. As the wastewater flows into the sedimentation tank, the aggregates and sand carried in it accumulate at the bottom and gradually rise, eventually burying the inlet pipe. The wastewater, filtered by the aggregates and sand, causes the liquid level in the sedimentation tank to rise. Once the level reaches the baffle, the pre-filtered wastewater flows through a conveying hole into the water conveying section, and then into the reaction tank. Subsequently, an acidic solution is introduced into the reaction tank by a material addition device to neutralize the wastewater, completing the wastewater recycling process. Through this process, the aggregates and sand in the wastewater are separated from the wastewater. After neutralization, the wastewater is restored to a reusable water source, thereby reducing the company's production costs. Furthermore, the baffles and conveying holes allow the wastewater in the sedimentation tank to rise relatively smoothly into the water conveying section. During this process, the possibility of significant agitation of the wastewater is reduced, thus reducing the likelihood of large quantities of aggregates and sand entering the water conveying section and improving the sedimentation effect. Additionally, the aggregates and sand, which are embedded within the inlet pipe, buffer the inflow rate, further reducing the possibility of significant agitation of the settled aggregates and sand during the wastewater's entry, further improving the sedimentation effect. Simultaneously, the aggregates and sand provide preliminary filtration of the wastewater before it enters the sedimentation tank, further enhancing the sedimentation effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a concrete production wastewater reuse device according to an embodiment of this application;

[0019] Figure 2This is a cross-sectional view of a concrete production wastewater reuse device according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the sedimentation tank in a concrete production wastewater reuse device according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the connecting pipe in a concrete production wastewater recycling device according to an embodiment of this application;

[0022] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle;

[0023] Figure 6 This is a schematic diagram of the reaction tank in a concrete production wastewater reuse device according to an embodiment of this application;

[0024] Figure 7 yes Figure 6 Enlarged diagram of part B.

[0025] Explanation of reference numerals in the attached drawings: 1. Sedimentation tank; 111. Sedimentation section; 112. Water conveyance section; 2. Reaction tank; 3. Inlet pipe;

[0026] 4. Partition plate; 41. Plate body; 42. Conveying trough; 43. U-bolt; 5. Conveying hole;

[0027] 6. Material adding device; 61. Material box; 62. Feed pipe; 63. Discharge hole; 64. Sealing pipe; 65. Waterproof motor; 66. First gear; 67. Second gear; 68. Conveying pump;

[0028] 7. Connecting pipe; 71. First pipe body; 72. Second pipe body; 73. Third pipe body;

[0029] 8. Filter screen; 81. Filter screen frame; 82. Filter screen section; 83. Extension frame; 84. Support spring; 85. Boss;

[0030] 9. Discharge port; 10. Blocking head; 11. Drive motor; 12. First quick-connect pipe; 13. Second quick-connect pipe; 14. Mixing plate. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0032] This application discloses a device for reusing concrete production wastewater. (Refer to...) Figure 1 and Figure 2The concrete production wastewater reuse device includes a sedimentation tank 1 through which wastewater is introduced and a reaction tank 2 for acidifying the wastewater. The sedimentation tank 1 is connected to the reaction tank 2. An inlet pipe 3 is provided on the side wall of the sedimentation tank 1 near the bottom wall. The inlet pipe 3 extends into the sedimentation tank 1 and is connected to the bottom of the sedimentation tank 1. The inlet pipe 3 has multiple inlet holes facing the bottom of the sedimentation tank 1. The inlet holes are evenly arranged along the length of the inlet pipe 3 and the arrangement ends of the inlet holes are located inside the sedimentation tank 1.

[0033] Reference Figure 1 and Figure 2 Furthermore, a baffle 4 is provided inside the sedimentation tank 1. The baffle 4 has the same cross-section as the inner cavity of the sedimentation tank 1 and abuts against the inner wall of the sedimentation tank 1. The baffle 4 is located above the water inlet pipe 3 and divides the sedimentation tank 1 into a sedimentation section 111 and a water conveying section 112. The water conveying section 112 is connected to the reaction tank 2 and is located at the upper part of the sedimentation tank 1. Multiple conveying holes 5 are provided on the baffle 4, and the sedimentation section 111 and the water conveying section 112 are connected through the conveying holes 5.

[0034] Reference Figure 1 and Figure 2 The reaction tank 2 is equipped with a material adding device 6, which is used to add acidic solution to the wastewater to neutralize the alkaline solution in the wastewater.

[0035] During wastewater recycling, wastewater is introduced into sedimentation tank 1. The wastewater undergoes sedimentation in sedimentation tank 1 for a period of time. Then, wastewater is continued to be introduced while controlling the flow rate. As the wastewater flows into sedimentation tank 1, the aggregates and sand carried in the wastewater accumulate at the bottom of sedimentation tank 1 and gradually rise. The aggregates and sand bury the inlet pipe 3. The wastewater introduced into sedimentation tank 1 again gradually rises in level due to the filtration effect of the aggregates and sand. When the level rises to the baffle 4, the pre-filtered wastewater flows through the conveying hole 5 into the water conveying section 112 and then flows into the reaction tank 2. Subsequently, under the action of the material adding device 6, an acidic solution is introduced into the reaction tank 2 to neutralize the wastewater and complete the wastewater recycling process.

[0036] Reference Figure 2 and Figure 3In this embodiment, to improve the sedimentation effect of the partition 4 and the conveying hole 5 on the wastewater, the axis of the conveying hole 5 is curved. The axis of the conveying hole 5 can be wavy, arc-shaped, etc., and the openings at both ends of the conveying hole 5 are located on the two plates of the partition 4 respectively. The curved axis of the conveying hole 5 extends the internal conveying length of the conveying hole 5, which facilitates the sedimentation of aggregates and sand carried in the wastewater inside the conveying hole 5, thereby reducing the possibility of aggregates and sand entering the water conveying section 112. Furthermore, under the action of the conveying hole 5, the wastewater with a large degree of shaking in the sedimentation section 111 is reduced after passing through the conveying hole 5, thereby reducing the degree of shaking of the wastewater in the water conveying section 112, which makes it easier for the wastewater in the water conveying section 112 to carry less aggregates and sand into the reaction tank 2.

[0037] Reference Figure 2 and Figure 3 Furthermore, multiple baffles are installed inside the conveying hole 5. These baffles are arranged along the axial direction of the conveying hole 5 and located on the upper and lower sides of the conveying hole 5. The baffles on the upper and lower sides are staggered and extend into the spaces between adjacent baffles on opposite sides. The baffles are inclined in the opposite direction to the wastewater conveying direction. Under the action of the baffles, the wastewater entering the conveying hole 5 undergoes secondary filtration. Aggregates and sand carried in the wastewater are retained within the conveying hole 5, further reducing the amount of aggregates and sand entering the water conveying section 112.

[0038] Reference Figure 2 and Figure 3 To facilitate the removal of aggregates and sand from the conveying holes 5, the conveying holes 5 are evenly arranged on the partition plate 4. In this embodiment, the conveying holes 5 are arranged in a rectangular array. The partition plate 4 includes multiple plates 41, which are spliced ​​together on a horizontal plane to form the partition plate 4. Conveying grooves 42 are provided on the splicing surfaces on both sides of the plates 41. After adjacent plates 41 are spliced ​​together, the conveying grooves 42 on the splicing surfaces of the plates 41 are spliced ​​together to form the conveying holes 5. Adjacent plates 41 are connected by U-bolts 43. When removing aggregates and sand from the conveying holes 5, the U-bolts 43 are removed from the adjacent plates 41, and then the adjacent plates 41 are separated. After the plates 41 are separated, the cross-section of the conveying groove 42 faces the operator. Then, the aggregates and sand in the conveying groove 42 are removed. The operation is simple and convenient.

[0039] In other embodiments of this application, the baffle can be replaced with activated carbon disposed in the conveying hole 5; activated carbon filters aggregates and sand in wastewater, and the operation is simple and convenient.

[0040] Reference Figure 2 and Figure 4In this embodiment of the application, a connecting pipe 7 is provided between the sedimentation tank 1 and the reaction tank 2. The connecting pipe 7 is used to connect the water conveying section 112 and the reaction tank 2. The connecting pipe 7 is U-shaped and includes a first pipe body 71 and a second pipe body 72 located on both sides of the first pipe body 71 and connected to each other. The two second pipe bodies 72 are respectively connected to the water conveying section 112 and the reaction tank 2. A third pipe body 73 is connected to the first pipe body 71. A filter screen 8 is provided inside the first pipe body 71. After the wastewater conveyed by the second pipe body 72 enters the first pipe body 71, the filter screen 8 filters the aggregate and sand. The filtered aggregate and sand fall into the third pipe body 73.

[0041] Wastewater in the water conveyance section 112 enters the second pipe body 72 and flows into the first pipe body 71. When the wastewater flows through the first pipe body 71, it is filtered by the filter screen 8. The aggregates and sands carried in the wastewater are retained in front of the filter screen 8 and fall into the third pipe body 73, so as to achieve deep filtration of the wastewater and further reduce the aggregates and sands entering the reaction tank 2.

[0042] Reference Figure 2 and Figure 4 In this embodiment of the application, the end of the third pipe 73 opposite to the first pipe 71 is provided with a discharge port 9. A plug head 10 is detachably provided on the third pipe 73 and plugs the discharge port 9. The plug head 10 is inserted into the discharge port 9. When the aggregate and sand in the third pipe 73 are removed, the plug head 10 is pulled out from the third pipe 73, and the aggregate and sand in the third pipe 73 fall out through the discharge port 9.

[0043] Reference Figure 4 and Figure 5 To facilitate the entry of aggregates and gravel filtered through the filter screen 8 into the third pipe body 73, both the first pipe body 71 and the third pipe body 73 have rectangular cross-sections. The filter screen 8 is inclinedly installed inside the first pipe body 71, with one side of the filter screen 8 located inside the first pipe body 71 and the other side located inside the third pipe body 73. The horizontal sides of the filter screen 8 abut against the side walls of the first pipe body 71 and the third pipe body 73, respectively. The vertical sides of the filter screen 8 are the top wall of the first pipe body 71 and the side wall of the third pipe body 73, respectively. The water flow impact surface of the filter screen 8 faces away from the reaction tank 2 and is inclined downwards. The inclined installation of the filter screen 8 allows the aggregates and gravel to slide along the filter screen 8 under the influence of the water flow after the wastewater impacts the filter screen 8, thereby allowing the aggregates and gravel to enter the third pipe body 73.

[0044] Reference Figure 2 , Figure 4 and Figure 5To facilitate the removal of aggregate stuck in the filter screen 8 and improve the water passage capacity of the filter screen 8, the filter screen 8 is rotatably installed inside the first tube 71. The rotation axis of the filter screen 8 is parallel to the bottom surface of the first tube 71 and perpendicular to the axial direction of the first tube 71. Furthermore, a drive motor 11 is installed on the outside of the first tube 71, and the output shaft of the drive motor 11 enters the first tube 71. Furthermore, the output shaft of the drive motor 11 is located directly above the third tube 73 and in the middle of the projection of the third tube 73 onto the first tube 71. The filter screen 8 is fixedly installed on the output shaft of the drive motor 11. The wastewater reuse device also includes a first quick-connect pipe 12 installed on the second tube 72 and a second quick-connect pipe 13 installed on the sedimentation tank 1 and the reaction tank 2 respectively. The first quick-connect pipe 12 and the second quick-connect pipe 13 are plugged into each other.

[0045] When removing the aggregate stuck on the filter screen 8, firstly, the connecting pipe 7 is removed from the sedimentation tank 1 and the reaction tank 2, and the positions of the two sides of the connecting pipe 7 are reversed. Then, the connecting pipe 7 is reconnected to the sedimentation tank 1 and the reaction tank 2. During this process, the first quick-connect pipe 12 is inserted into the second quick-connect pipe 13, thus completing the connection of the connecting pipe 7. Then, the drive motor 11 is started, and the drive motor 11 drives the filter screen 8 to rotate. The filter screen 8 rotates to the other side, and then the wastewater filtration operation is carried out. At this time, the water flow impact surface and the back side of the filter screen 8 are reversed, so that when the wastewater passes through the filter screen 8, the aggregate stuck in the filter screen 8 is removed. The operation is simple and convenient.

[0046] Reference Figure 2 , Figure 4 and Figure 5 To facilitate the rotation of the filter screen 8 within the first tube 71, the filter screen 8 includes a filter frame 81, a filter part 82 disposed within the filter frame 81, and extension frames 83 slidably disposed on both vertical sides of the filter frame 81. The lateral sides of the extension frames 83 abut against the top wall of the first tube 71 and the side wall of the third tube 73, respectively. The extension frames 83 are slidably engaged with the filter frame 81 and slide along the height direction of the filter frame 81. A support spring 84 is disposed within the extension frame 83, with one end of the support spring 84 disposed on the extension frame 83. The other end is set on the filter screen frame 81, and the support spring 84 drives the extension frame 83 to abut against the corresponding first tube 71 and third tube 73. Under the action of the extension frame 83, both sides of the filter screen 8 have a certain amount of room for movement, which makes it easier for the filter screen 8 to rotate to the other side. Under the action of the support spring 84, the extension frame 83 abuts against the corresponding first tube 71 and third tube 73, reducing the gap between the filter screen 8 and the first tube 71 and third tube 73, thereby improving the filtration effect of wastewater.

[0047] Reference Figure 2 , Figure 4 and Figure 5Furthermore, the end of the connecting frame 83 facing away from the filter frame 81 is provided with a boss 85. Both sides of the boss 85 abut against the transverse sidewalls of the corresponding first tube 71 and third tube 73. The boss 85 is arc-shaped, and the arc surface of the boss 85 abuts against the top wall of the corresponding first tube 71 and the side wall of the corresponding third tube 73. Under the action of the boss 85, it is convenient for the boss 85 to abut against the sidewalls of the first tube 71 and the third tube 73. At the same time, it is convenient for the boss 85 to slide along the top wall of the first tube 71 and the side wall of the third tube 73 when the filter frame 81 rotates.

[0048] Reference Figure 2 , Figure 6 and Figure 7 In this embodiment, the material adding device 6 includes a material box 61 disposed at the top of the reaction tank 2. An acidic solution is added to the material box 61. A feed pipe 62 is connected to the bottom of the material box 61 and extends into the reaction tank 2. The feed pipe 62 has multiple discharge holes 63 evenly arranged along its length. The material adding device 6 also includes a sealing pipe 64 coaxially disposed within the feed pipe 62. The sealing pipe 64 is hollow and has multiple feeding ports 69. The sealing pipe 64 is connected to the material box 61, and the feeding ports 69 correspond one-to-one with the discharge holes 63. The feed pipe 62 rotates... The device is installed inside the reaction tank 2. The reaction tank 2 is equipped with a drive unit for driving the feed pipe 62 to rotate, connecting the discharge hole 63 and the feed port 69, so as to send the acidic solution into the reaction tank 2. The drive unit includes a waterproof motor 65 installed at the top of the reaction tank 2. A first gear 66 is installed on the output shaft of the waterproof motor 65, and a second gear 67 that meshes with the first gear 66 is fixedly installed on the feed pipe 62. When the waterproof motor 65 is started, the waterproof motor 65 drives the first gear 66 to rotate. The rotation of the first gear 66 drives the second gear 67 to rotate, and the rotation of the second gear 67 drives the feed pipe 62 to rotate. The operation is simple and convenient.

[0049] Reference Figure 2 , Figure 6 and Figure 7 Furthermore, a conveying pump 68 is installed inside the material box 61, and a sealing pipe 64 is installed at the output end of the conveying pump 68. The conveying pump 68 is submerged in the acidic solution. When the conveying pump 68 is started, the conveying pump 68 injects the acidic solution into the sealing pipe 64 and removes the acidic solution from the feed pipe 62.

[0050] Reference Figure 2 , Figure 6 and Figure 7To facilitate thorough mixing of the acidic solution and wastewater, multiple stirring plates 14 are installed on the feed pipe 62. The stirring plates 14 are evenly arranged along the length and circumference of the feed pipe 62 and are staggered with the discharge hole 63. When the feed pipe 62 rotates, it drives the stirring plates 14 to rotate. The rotation of the stirring plates 14 stirs the wastewater, making the wastewater and acidic solution mix more thoroughly and improving the neutralization effect of the wastewater.

[0051] The implementation principle of a concrete production wastewater reuse device according to an embodiment of this application is as follows:

[0052] During wastewater recycling, wastewater is introduced into sedimentation tank 1. The wastewater undergoes sedimentation in sedimentation tank 1 for a period of time. Then, wastewater is introduced again while controlling the flow rate. As the wastewater flows into sedimentation tank 1, the aggregates and sand carried in the wastewater accumulate at the bottom of sedimentation tank 1 and gradually rise. The aggregates and sand bury the inlet pipe 3. The wastewater introduced into sedimentation tank 1 again gradually rises in level due to the filtration effect of the aggregates and sand. When the level rises to the baffle 4, the pre-filtered wastewater flows through the conveying hole 5 into the water conveying section 112 and then flows into the reaction tank 2. Subsequently, the waterproof motor 65 is started, which drives the first gear 66 to rotate. The rotation of the first gear 66 drives the second gear 67 to rotate, and the rotation of the second gear 67 drives the feed pipe 62 to rotate. After the feed pipe 62 is connected to the sealing pipe 64, an acidic solution is introduced into the reaction tank 2 to neutralize the wastewater and complete the wastewater recycling process.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for reusing concrete production wastewater, characterized in that: The system includes a sedimentation tank (1) for introducing wastewater and a reaction tank (2) for acidifying the wastewater. The sedimentation tank (1) is connected to the reaction tank (2). An inlet pipe (3) is provided on the side wall of the sedimentation tank (1) near the bottom wall. The inlet pipe (3) is connected to the bottom of the sedimentation tank (1). The inlet pipe (3) has multiple inlet holes facing the bottom of the sedimentation tank (1). A partition (4) is provided inside the sedimentation tank (1). The partition (4) is located above the inlet pipe (3) and divides the sedimentation tank (1) into a sedimentation section (111) and a water conveying section (112). Multiple conveying holes (5) are provided on the partition (4). The sedimentation section (111) and the water conveying section (112) are connected through the conveying holes (5). A material adding device (6) is provided inside the reaction tank (2). The material adding device (6) is used to add acidic solution to the wastewater to neutralize the alkaline solution in the wastewater. The axis of the conveying hole (5) is curved, and the openings at both ends of the conveying hole (5) are located on the two plates of the partition (4).

2. The device for reusing concrete production wastewater according to claim 1, characterized in that: The conveying holes (5) are evenly arranged on the partition (4). The partition (4) includes multiple plates (41). The plates (41) are spliced ​​together on the horizontal plane to form the partition (4). The splicing surfaces on both sides of the plates (41) are provided with conveying grooves (42). After the adjacent plates (41) are spliced ​​together, the conveying grooves (42) on the splicing surfaces of the plates (41) are spliced ​​together to form conveying holes (5).

3. The device for reusing concrete production wastewater according to claim 1, characterized in that: A connecting pipe (7) is provided between the sedimentation tank (1) and the reaction tank (2). The connecting pipe (7) is U-shaped and includes a first pipe body (71) and a second pipe body (72) located on both sides of the first pipe body (71) and connected to each other. The two second pipe bodies (72) are respectively connected to the sedimentation tank (1) and the reaction tank (2). A third pipe body (73) is connected to the first pipe body (71). A filter screen (8) is provided inside the first pipe body (71). After the wastewater transported into the second pipe body (72) enters the first pipe body (71), the filter screen (8) filters the aggregate and sand. The filtered aggregate and sand fall into the third pipe body (73).

4. The device for reusing concrete production wastewater according to claim 3, characterized in that: The first tube (71) and the third tube (73) are both rectangular in cross-section. The filter screen (8) is inclinedly arranged inside the first tube (71). One side of the filter screen (8) is located inside the first tube (71) and the other side is located inside the third tube (73). The two lateral sides of the filter screen (8) abut against the side walls of the first tube (71) and the third tube (73) respectively. The two vertical sides of the filter screen (8) are the top wall of the first tube (71) and the side wall of the third tube (73) respectively. The water flow impact surface of the filter screen (8) faces away from the reaction tank (2) and is inclined downwards.

5. The concrete production wastewater reuse device according to claim 4, characterized in that: The filter screen (8) is rotatably disposed inside the first pipe body (71), and the rotation axis of the filter screen (8) is parallel to the bottom surface of the first pipe body (71) and perpendicular to the axial direction of the first pipe body (71); the wastewater reuse device also includes a first quick-connect pipe (12) disposed on the second pipe body (72) and a second quick-connect pipe (13) disposed on the sedimentation tank (1) and the reaction tank (2) respectively, and the first quick-connect pipe (12) and the second quick-connect pipe (13) are plugged into each other.

6. A device for reusing concrete production wastewater according to claim 5, characterized in that: The filter screen (8) includes a filter screen frame (81), a filter screen part (82) disposed in the filter screen frame (81), and an extension frame (83) slidably disposed on both vertical sides of the filter screen frame (81). The two horizontal sides of the extension frame (83) respectively abut against the top wall of the first tube (71) and the side wall of the third tube (73). The extension frame (83) is slidably engaged on the filter screen frame (81). The extension frame (83) slides along the height direction of the filter screen frame (81). A support spring (84) is disposed inside the extension frame (83). One end of the support spring (84) is disposed on the extension frame (83), and the other end is disposed on the filter screen frame (81). The support spring (84) drives the extension frame (83) to abut against the corresponding first tube (71) and third tube (73).

7. A device for reusing concrete production wastewater according to claim 6, characterized in that: The extension frame (83) is provided with a boss (85) at the end away from the filter frame (81). Both sides of the boss (85) abut against the transverse sidewalls of the corresponding first tube (71) and third tube (73). The boss (85) is arc-shaped, and the arc surface of the boss (85) abuts against the top wall of the corresponding first tube (71) and the side wall of the corresponding third tube (73).

8. A device for reusing concrete production wastewater according to claim 1, characterized in that: The material adding device (6) includes a material box (61) set at the top of the reaction tank (2), and a feed pipe (62) is set at the bottom of the material box (61). The feed pipe (62) extends into the reaction tank (2). Multiple discharge holes (63) are opened on the feed pipe (62). The discharge holes (63) are evenly arranged along the length of the feed pipe (62). The material adding device (6) also includes a sealing pipe (64) coaxially set in the feed pipe (62). The sealing pipe (64) is hollow and has multiple feeding ports. The sealing pipe (64) is connected to the material box (61). The feeding ports correspond one-to-one with the discharge holes (63). The feed pipe (62) is rotatably set in the reaction tank (2). The reaction tank (2) is provided with a driving component for driving the feed pipe (62) to rotate, so as to connect the discharge holes (63) and the feeding ports, so as to send the acidic solution into the reaction tank (2).

9. A device for reusing concrete production wastewater according to claim 8, characterized in that: The feed pipe (62) is provided with a plurality of stirring plates (14), which are evenly arranged along the length and circumference of the feed pipe (62) and intersect with the discharge hole (63).

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