Sedimentation tank for pretreatment of acid-containing wastewater

Abstract

The sedimentation tank comprises a sedimentation tank main body, a partition plate is arranged in the sedimentation tank main body, a first sedimentation area and a second sedimentation area which are located at the top end of the partition plate and communicated with each other are arranged in the sedimentation tank main body, and a waste material cavity located at the bottom end of the partition plate is arranged in the sedimentation tank main body. A waste barrel communicated with the first sedimentation area and the second sedimentation area is arranged in the waste cavity, a spiral discharging blade is rotationally arranged in the waste barrel, a bearing plate is arranged on the top surface of the sedimentation tank main body, and a group of hydraulic telescopic rods extending into the first sedimentation area and the second sedimentation area are symmetrically arranged on the bearing plate; and the bottom end of the hydraulic telescopic rod is connected with a cleaning scraping plate. Compared with the prior art, the cleaning device has the advantages that the cleaning scraper blade can be pushed to clean the inner wall of the sedimentation tank through stretching and retracting of the hydraulic telescopic rod, and finally impurities can be smoothly taken out under the action of the spiral discharging blade, so that the cleaning work is simple and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of acid-containing wastewater treatment, in particular to a sedimentation tank used for pretreatment of acid-containing wastewater. Background Art

[0002] Acidic wastewater is wastewater with a pH value less than 6, mainly from wastewater discharged by metallurgy, metal processing, petrochemical, chemical fiber, electroplating and other enterprises; alkaline wastewater is wastewater with a pH value greater than 9, mainly from papermaking, leather making, oil refining, petrochemical, chemical fiber and other industries. Acidic and alkaline wastewater entering the water body will destroy the natural neutralization effect, change the pH value of the water body, affect the normal growth of aquatic organisms, and reduce the self-purification function of the water body. Acidic and alkaline wastewater infiltrates into the soil, which will destroy the physical and chemical properties of the soil, cause the soil to acidify or alkalinize, and affect the normal growth of crops. Acidification of water bodies can also cause damage to ships, bridges and other water buildings. Therefore, it is necessary to neutralize the acidic and alkaline wastewater before discharging it to reduce the risk of pollution.

[0003] Suspended matter and other particulate impurities inevitably exist in acidic wastewater, and it needs to be pretreated before neutralization treatment. The impurities in it are filtered out by sedimentation to improve the efficiency of subsequent treatment. The existing sedimentation tank for pretreatment of acidic wastewater directly introduces the acidic wastewater into the sedimentation tank during use. As time goes by, impurities accumulate at the bottom of the sedimentation tank. The pretreated wastewater is taken out through the guide pipe for neutralization treatment. However, the accumulated impurities are easy to adhere to the inner wall of the sedimentation tank, affecting its use, and it is very easy to get blocked, which requires a lot of manpower and material resources to clean it. Therefore, a sedimentation tank for pretreatment of acidic wastewater that is easy to clean is needed. Utility Model Content

[0004] The technical problem to be solved by the utility model is that long-term accumulation of impurities easily leads to blockage and is difficult to clean, and a sedimentation tank for pretreatment of acid-containing wastewater which is easy to clean is provided.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is as follows: a sedimentation tank for pretreatment of acid-containing wastewater, comprising a sedimentation tank main body, a water inlet pipe is connected to the top of the left wall of the sedimentation tank main body, a guide pipe is connected to the right wall of the sedimentation tank main body, a partition plate is fixedly arranged horizontally in the sedimentation tank main body, a sedimentation cavity located at the top of the partition plate is arranged in the sedimentation tank main body, a waste cavity located at the bottom of the partition plate is arranged in the sedimentation tank main body, a partition plate located in the center of the top surface of the partition plate is arranged in the sedimentation cavity, a first sedimentation area and a second sedimentation area connected to each other are arranged on the left and right sides of the partition plate, a waste barrel connected to the first sedimentation area and the second sedimentation area is horizontally arranged in the waste cavity, a spiral unloading blade is horizontally rotatable in the waste barrel, a load-bearing plate is fixedly arranged on the top surface of the sedimentation tank main body, a group of hydraulic telescopic rods extending into the first sedimentation area and the second sedimentation area are symmetrically arranged on the bottom surface of the load-bearing plate, and a cleaning scraper close to the inner wall of the sedimentation tank main body and the partition plate is connected to the bottom end of the hydraulic telescopic rod.

[0006] As an improvement, a drive motor for driving the spiral discharge blades is fixedly provided on the left outer wall of the sedimentation tank body. The setting of the drive motor can cooperate with the driving spiral discharge blades to rotate, so that impurities can be discharged smoothly.

[0007] As an improvement, the right outer wall of the sedimentation tank body is provided with an extrusion pipe connected to the waste barrel, and the provision of the extrusion pipe facilitates the discharge of impurities.

[0008] As an improvement, the partition plate is evenly provided with a plurality of overflow ports connected to the first sedimentation zone and the second sedimentation zone. The overflow ports allow the liquid after sedimentation in the first sedimentation zone to be smoothly discharged to the second sedimentation zone for secondary sedimentation, thereby improving the impurity removal effect.

[0009] As an improvement, the first sedimentation zone and the second sedimentation zone are both provided with a conical conduit at the bottom, and the partition plate is provided with a through hole connected to the conical conduit and the waste bucket, so that all impurities can be smoothly released into the waste bucket.

[0010] Compared with the prior art, the utility model has the advantages that the precipitated impurities are released into the waste barrel, and then the extension and retraction of the hydraulic telescopic rod can push the cleaning scraper to clean the inner wall of the sedimentation tank, and finally the impurities can be smoothly taken out under the action of the spiral feeding blades, making the cleaning work simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a first stereoscopic diagram of a sedimentation tank for pretreatment of acid-containing wastewater according to the utility model.

[0012] Figure 2 It is a second stereoscopic diagram of a sedimentation tank for pretreatment of acid-containing wastewater according to the utility model.

[0013] Figure 3 It is a first sectional stereoscopic diagram of a sedimentation tank for pretreatment of acid-containing wastewater according to the utility model.

[0014] Figure 4 It is a second cross-sectional stereoscopic diagram of a sedimentation tank for pretreatment of acid-containing wastewater according to the utility model.

[0015] As shown in the figure: 1. Sedimentation tank body; 2. Water inlet pipe; 3. Guide pipe; 4. Partition plate; 5. Sedimentation chamber; 6. Waste chamber; 7. Partition plate; 8. First sedimentation area; 9. Second sedimentation area; 10. Waste barrel; 11. Spiral discharge blade; 12. Load-bearing plate; 13. Hydraulic telescopic rod; 14. Cleaning scraper; 15. Drive motor; 16. Extrusion tube; 17. Overflow port; 18. Conical conduit; 19. Through hole. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0017] Embodiment 1

[0018] Combined with Figure 1-2 As shown in Figure 4, a sedimentation tank for pretreatment of acid-containing wastewater comprises a sedimentation tank body 1, a water inlet pipe 2 is connected to the top of the left wall of the sedimentation tank body 1, a flow guide pipe 3 is connected to the right wall of the sedimentation tank body 1, a partition plate 4 is fixedly arranged horizontally in the sedimentation tank body 1, a sedimentation cavity 5 located at the top of the partition plate 4 is arranged in the sedimentation tank body 1, a waste cavity 6 located at the bottom of the partition plate 4 is arranged in the sedimentation tank body 1, a partition plate 7 located at the center of the top surface of the partition plate 4 is arranged in the sedimentation cavity 5, a first sedimentation area 8 and a second sedimentation area 9 are respectively arranged on the left and right sides of the partition plate 7, and a plurality of overflow ports 17 connected to the first sedimentation area 8 and the second sedimentation area 9 are evenly arranged on the partition plate 7;

[0019] Through the above structure, the acid-containing wastewater is introduced into the sedimentation tank body 1 through the water inlet pipe 2, so that it first enters the first sedimentation area 8 of the sedimentation chamber 5, and the wastewater after precipitation in the first sedimentation area 8 enters the second sedimentation area 9 through the overflow port 17 for secondary precipitation. All impurities in the wastewater are accumulated at the bottom of the first sedimentation area 8 and the second sedimentation area 9. Finally, the wastewater after precipitation is discharged from the sedimentation tank through the guide pipe 3 and then neutralized.

[0020] A waste barrel 10 connected to the first sedimentation area 8 and the second sedimentation area 9 is horizontally arranged in the waste cavity 6, a conical conduit 18 is arranged at the bottom of each of the first sedimentation area 8 and the second sedimentation area 9, a through hole 19 connected to the conical conduit 18 and the waste barrel 10 is arranged on the partition plate 4, a spiral feed blade 11 is horizontally rotated in the waste barrel 10, a driving motor 15 for driving the spiral feed blade 11 is fixedly arranged on the left outer wall of the sedimentation tank body 1, and an extrusion pipe 16 connected to the waste barrel 10 is arranged on the right outer wall of the sedimentation tank body 1;

[0021] Through the above structure, the wastewater impurities accumulated in the first sedimentation area 8 and the second sedimentation area 9 are concentrated in the conical conduit 18, and finally discharged into the waste barrel 10 through the through hole 19. The drive motor 15 is started at a fixed time, and the spiral feeding blade 11 rotates to discharge the impurities in the waste barrel 10 through the extrusion tube 16, thereby completing the cleaning of the waste barrel 10 and avoiding blockage.

[0022] Embodiment 2

[0023] Based on the first embodiment, combined with the attached Figure 3 As shown, a load-bearing plate 12 is fixedly arranged on the top surface of the sedimentation tank body 1, and a group of hydraulic telescopic rods 13 extending into the first sedimentation area 8 and the second sedimentation area 9 are symmetrically arranged on the bottom surface of the load-bearing plate 12, and a cleaning scraper 14 is connected to the bottom end of the hydraulic telescopic rod 13 and is close to the inner wall of the sedimentation tank body 1 and the partition plate 7;

[0024] Through the above structure, after the wastewater in the sedimentation tank body 1 is released and taken out, the hydraulic telescopic rod 13 is extended to push the cleaning scraper 14 to scrape and remove the impurities adhered to the inner wall of the sedimentation tank body 1 and the partition plate 7, and finally released into the waste barrel 10 through the conical conduit 18 for centralized treatment.

[0025] During the specific implementation of the utility model, the acid-containing wastewater is first introduced into the sedimentation tank body 1 through the water inlet pipe 2, and the acid-containing wastewater enters the first sedimentation area 8 of the sedimentation chamber 5. After the wastewater is precipitated in the first sedimentation area 8, it enters the second sedimentation area 9 through the overflow port 17 for secondary sedimentation. The impurities in the wastewater are all accumulated at the conical conduit 18 at the bottom of the first sedimentation area 8 and the second sedimentation area 9. Finally, the wastewater after precipitation is discharged through the guide pipe 3 for neutralization treatment. The wastewater impurities accumulated in the conical conduit 18 are discharged into the waste bucket 10 through the through hole 19. The driving motor 15 is started at a fixed time, and the spiral feeding blade 11 rotates to discharge the impurities in the waste bucket 10 through the extrusion tube 16. At the same time, the hydraulic telescopic rod 13 is extended to push the cleaning scraper 14 to scrape and remove the impurities adhered to the inner wall of the sedimentation tank body 1 and the partition plate 7, and finally released into the waste bucket 10 through the conical conduit 18 for centralized treatment.

[0026] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A sedimentation tank for pretreatment of acidic wastewater, comprising a sedimentation tank body (1), wherein the top of the left wall of the sedimentation tank body (1) is connected to a water inlet pipe (2), and the right wall of the sedimentation tank body (1) is connected to a flow guide pipe (3), characterized in that: A partition plate (4) is fixedly arranged horizontally in the sedimentation tank body (1), a sedimentation chamber (5) is arranged in the sedimentation tank body (1) and is located at the top of the partition plate (4), a waste chamber (6) is arranged in the sedimentation tank body (1) and is located at the bottom of the partition plate (4), a partition plate (7) is arranged in the sedimentation chamber (5) and is located at the center of the top surface of the partition plate (4), a first sedimentation area (8) and a second sedimentation area (9) are arranged on the left and right sides of the partition plate (7) and are connected to each other, and a waste chamber (6) is arranged horizontally in the waste chamber (6) and is connected to the waste chamber (7). A waste barrel (10) is connected to the first sedimentation area (8) and the second sedimentation area (9), wherein a spiral material discharge blade (11) is provided in the waste barrel (10) for horizontal rotation, a load-bearing plate (12) is fixedly provided on the top surface of the sedimentation tank body (1), and a group of hydraulic telescopic rods (13) extending into the first sedimentation area (8) and the second sedimentation area (9) are symmetrically provided on the bottom surface of the load-bearing plate (12), and a cleaning scraper (14) is connected to the bottom end of the hydraulic telescopic rod (13) and is closely attached to the inner wall of the sedimentation tank body (1) and the partition plate (7).

2. A sedimentation tank for pretreatment of acidic wastewater according to claim 1, characterized in that: A driving motor (15) for driving the spiral unloading blades (11) is fixedly provided on the left outer wall of the sedimentation tank body (1).

3. A sedimentation tank for pretreatment of acidic wastewater according to claim 1, characterized in that: The right outer wall of the sedimentation tank body (1) is provided with an extrusion pipe (16) which is in communication with the waste barrel (10).

4. A sedimentation tank for pretreatment of acidic wastewater according to claim 1, characterized in that: The partition plate (7) is evenly provided with a plurality of overflow ports (17) that are in communication with the first sedimentation zone (8) and the second sedimentation zone (9).

5. A sedimentation tank for pretreatment of acidic wastewater according to claim 1, characterized in that: The first sedimentation zone (8) and the second sedimentation zone (9) are both provided with a conical conduit (18) at their inner bottom ends, and the partition plate (4) is provided with a through hole (19) communicating with the conical conduit (18) and the waste bucket (10).

Images