Embedded efficient sedimentation tank structure

Abstract

The utility model discloses an embedded efficient sedimentation tank structure. A slow flow area, a mixed reaction area, a plug flow reaction area, a pre-sedimentation area, a sludge concentration area and an inclined tube sedimentation area are arranged in the device; the device comprises a water inlet, a guide pipe, a water passing port, a coagulation stirrer, a flow guide pipe, an external flow guide pipe, a flow guide cylinder, a flocculation stirrer, a partition plate, a sludge storage hopper, a sludge scraper, a sludge scraping device, a sludge storage hopper valve, a check valve, a sludge pump, a backflow valve, a sludge discharge valve, inclined pipe filler, an overflow weir (19) and a water outlet. Compared with the conventional common structure, the embedded high-efficiency sedimentation tank structure has the following advantages: 1, the reaction areas (the mixed reaction area and the plug flow reaction area) are embedded into the sedimentation area according to the volume of the process reaction area, so that the process volume is ensured, the whole equipment is more compact, and the space utilization rate is improved; 2, a flow slowing area is additionally arranged at the water inlet, so that the flow speed of sewage entering is slowed down, and the sewage in the coagulation area can be fully mixed with PAC (polyaluminum chloride); therefore, the influence of flow fluctuation on the coagulation effect is reduced.

Description

Technical Field

[0001] The utility model relates to the field of sludge sedimentation, and more specifically to an embedded high-efficiency sedimentation tank structure. Background Art

[0002] The interior of a high-efficiency sludge sedimentation tank is usually divided into multiple functional areas, including a reaction area (a mixing reaction area and a plug-flow reaction area) and a clarification area (a pre-sedimentation area, an inclined-tube sedimentation area, and a thickening area). This zoning design enables processes such as coagulation, flocculation, sedimentation, and sludge treatment to be carried out efficiently in their respective independent areas.

[0003] Currently, the existing high-efficiency sedimentation tanks mainly have the following problems:

[0004] 1. Although the high-efficiency sedimentation tank has better treatment effects than traditional sedimentation tanks, its zoning design makes its floor area relatively large, which is not easy to implement for sites with tight on-site land use and upgrading projects of existing equipment.

[0005] 2. The incoming water of the existing high-efficiency sedimentation tank directly enters the coagulation area without buffering. When the sewage enters, the flow rate is too fast, and the mixing with PAC (polyaluminum chloride) is insufficient, affecting the effect of the coagulation reaction. Content of the Utility Model

[0006] Therefore, to address the above deficiencies, the present utility model provides an embedded high-efficiency sedimentation tank structure herein. This patent mainly solves the following defects: The high-efficiency sedimentation tank realizes the effective removal of suspended solids in wastewater through two main processes of gravitational sedimentation and particle collision and coagulation, as well as reasonable tank design and the addition of chemical agents. Its working principle is simple and efficient, and it is widely used in industries such as water treatment, sewage treatment, mining, petrochemical, pharmaceutical, food and beverage, etc. (1) The high-efficiency sedimentation tank has better treatment effects than traditional sedimentation tanks, but due to its zoning design characteristics, its floor area is relatively large. (2) There is no buffering during water inlet, affecting the coagulation effect.

[0007] The present utility model is implemented as follows. A structure of an embedded high-efficiency sedimentation tank is constructed, characterized in that;

[0008] The device internally has a slow-flow area, a mixing reaction area, a plug-flow reaction area, a pre-sedimentation area, a sludge thickening area, and an inclined-tube sedimentation area;

[0009] The device comprises a water inlet (1), a conduit (2), a water outlet (3), a coagulation mixer (4), a flow guide pipe (5), an external flow guide pipe (6), a flow guide tube (7), a flocculation mixer (8), a baffle (9), a mud storage hopper (10), a mud scraper (11), a mud scraper device (12), a mud storage hopper valve (13), a check valve (14), a sludge pump (15), a reflux valve (16), a mud discharge valve (17), an inclined tube filler (18), an overflow weir (19), and a water outlet (20);

[0010] The water inlet (1) is connected to the conduit (2). The sewage to be precipitated enters the slow flow zone through the water inlet (1) and the conduit (2) to reduce the flow rate. A water outlet (3) is provided at the top of the slow flow zone. The slow flow zone enters the mixing reaction zone through the water outlet (3) at the top. A coagulation mixer (4) is provided in the mixing reaction zone.

[0011] The mixed reaction zone enters the plug flow reaction zone through the flow guide pipe (5) and the external flow guide pipe (6).

[0012] A guide tube (7) is provided inside the plug flow reaction zone. Sewage enters from the lower part of the guide tube (7) and is stirred and mixed by a flocculation stirrer (8). The mixed sewage is driven upward by the flocculation stirrer (8) inside the guide tube (7) and then flows downward from the outside of the guide tube (7) to pass over the partition (9) and enter the pre-sedimentation zone. The supernatant rises and passes through the internal gap of the inclined tube filler (18). The supernatant is then collected by an overflow weir (19) and discharged from a water outlet (20). A sludge concentration zone is provided below the inclined tube sedimentation zone. The sludge deposited on the inclined cone surface is scraped into a sludge storage hopper (10) by a sludge scraper (11) and a sludge scraper (12).

[0013] According to the structure of an embedded high-efficiency sedimentation tank described in the present application, the characteristics are as follows: the mud storage hopper (10) is designed with a mud discharge port connected to an external mud storage hopper valve (13) and a check valve (14) for suction by a sludge pump (15); the sludge pump (15) has an outlet divided into two paths, one of which is a sludge return pipe controlled by a return valve (16) to flow back to an external guide pipe (6) to improve the mixing sedimentation efficiency; and the other is a mud discharge pipe controlled by a mud discharge valve (17) to discharge externally to a sludge thickening tank for drying treatment.

[0014] The utility model has the following advantages: Compared with the currently commonly used structures, the embedded high-efficiency sedimentation tank structure has the following advantages: 1. The reaction zone (mixing reaction zone and plug flow reaction zone) is embedded in the sedimentation zone according to the volume of the process reaction zone, which not only ensures the process volume but also makes the overall equipment more compact and improves the space utilization rate. 2. A slow flow zone is added at the water inlet to slow down the flow rate of sewage entering, and the sewage in the coagulation zone can be fully mixed with PAC (polyaluminium chloride). This reduces the impact of flow fluctuations on the coagulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the implementation structure of this application.

[0016] Among them: water inlet 1, conduit 2, water passing port 3, coagulation mixer 4, diversion pipe 5, external diversion pipe 6, draft tube 7, flocculation stirrer 8, partition plate 9, sludge hopper 10, sludge scraper 11, sludge scraping device 12, sludge hopper valve 13, check valve 14, sludge pump 15, return valve 16, sludge discharge valve 17, inclined tube packing 18, overflow weir 19, water outlet 20. Specific implementation mode

[0017] The following will be combined with the attached Figure 1 The present utility model will be described in detail. The technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0018] The present utility model provides an embedded high-efficiency sedimentation tank structure herein. As Figure 1 shown, it can be implemented in the following manner; the structure internally has a slow flow zone, a mixing reaction zone, a plug flow reaction zone, a pre-sedimentation zone, a sludge thickening zone, and an inclined tube sedimentation zone;

[0019] The structure includes a water inlet 1, a conduit 2, a water passing port 3, a coagulation mixer 4, a diversion pipe 5, an external diversion pipe 6, a draft tube 7, a flocculation stirrer 8, a partition plate 9, a sludge hopper 10, a sludge scraper 11, a sludge scraping device 12, a sludge hopper valve 13, a check valve 14, a sludge pump 15, a return valve 16, a sludge discharge valve 17, an inclined tube packing 18, an overflow weir 19, and a water outlet 20;

[0020] The following will describe the operation process of the present application in detail with reference to the accompanying drawings:

[0021] The sewage to be precipitated enters the slow flow area through the conduit 2 from the water inlet 1 to reduce the flow rate, and enters the mixing reaction area through the upper water outlet 3. The mixed reaction area is added with PAC (polyaluminium chloride) and stirred by the coagulation mixer 4 to make the suspended matter, colloid and soluble matter in the sewage gather together to form large particles. After mixing, it enters the plug flow reaction area through the guide tube 5 and the external guide tube 6. There is a guide tube 7 with PAM (polyacrylamide) inside the plug flow reaction area. The sewage enters from the lower part of the guide tube 7 and is stirred and mixed by the flocculation mixer 8, so that the destabilized colloid or tiny suspended matter is aggregated into large flocs under the action of the flocculant to form high-density homogeneous alum flowers. The mixed sewage is driven upward by the flocculation mixer 8 inside the guide tube 7 and then flows downward from the outside of the guide tube 7 to cross the partition 9 and enter the pre-sedimentation area. The alum flowers slowly enter from the pre-sedimentation area, so that most of the alum flowers are precipitated in this area, and the remaining alum flowers enter the inclined tube sedimentation area to complete the remaining alum flower precipitation process. The supernatant rises through the internal gap of the inclined tube filler 18, which increases the sedimentation area and improves the sedimentation efficiency. The supernatant is then collected by the overflow weir 19 and discharged from the outlet 20. There is a sludge concentration area below the inclined tube sedimentation area. The scraper 11 drives the scraper device 12 to scrape the sludge deposited on the inclined cone surface into the sludge storage hopper 10. The sludge storage hopper 10 is designed with a sludge discharge port connected to the sludge storage hopper valve 13 and the check valve 14 to be sucked out by the sludge pump 15. The outlet of the sludge pump 15 is divided into two routes. One sludge return pipe is controlled by the reflux valve 16 to return the flow to the external guide pipe 6 to improve the mixing sedimentation efficiency. The other sludge discharge pipe is controlled by the sludge discharge valve 17 to be discharged to the sludge concentration tank for drying treatment.

[0022] The advantages and beneficial effects of this patent are as follows: Compared with the currently commonly used structures, the embedded high-efficiency sedimentation tank structure has the following advantages: 1. The reaction zone (mixing reaction zone and plug flow reaction zone) is embedded in the sedimentation zone according to the volume of the process reaction zone, which not only ensures the process volume but also makes the equipment more compact as a whole and improves the space utilization rate. 2. A slow flow zone is added at the water inlet to slow down the flow rate of sewage entering, so that the sewage in the coagulation zone can be fully mixed with PAC (polyaluminium chloride). This reduces the impact of flow fluctuations on the coagulation effect.

[0023] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An embedded high-efficiency sedimentation tank structure, characterized in that ； Inside this structure, there are a slow-flow zone, a mixing reaction zone, a plug-flow reaction zone, a pre-sedimentation zone, a sludge thickening zone, and an inclined-tube sedimentation zone; This structure includes an inlet (1), a conduit (2), a water passing port (3), a coagulation mixer (4), a diversion pipe (5), an external diversion pipe (6), a draft tube (7), a flocculation stirrer (8), a partition plate (9), a sludge hopper (10), a sludge scraper (11), a sludge scraping device (12), a sludge hopper valve (13), a check valve (14), a sludge pump (15), a reflux valve (16), a sludge discharge valve (17), inclined-tube packing (18), an overflow weir (19), and an outlet (20); The inlet (1) is connected to the conduit (2). The sewage to be sedimented enters the slow-flow zone through the conduit (2) from the inlet (1) to reduce the flow rate. A water passing port (3) is arranged in the upper part of the slow-flow zone. The slow-flow zone enters the mixing reaction zone through the upper water passing port (3). A coagulation mixer (4) is arranged in the mixing reaction zone. The mixing reaction zone enters the plug-flow reaction zone through the diversion pipe (5) and the external diversion pipe (6). Inside the plug-flow reaction zone, there is a draft tube (7). The sewage enters from the lower part of the draft tube (7), is stirred and mixed by the flocculation stirrer (8). The mixed sewage is driven upward by the flocculation stirrer (8) inside the draft tube (7) and then flows downward outside the draft tube (7) to cross the partition plate (9) and enter the pre-sedimentation zone. The supernatant rises through the internal gaps of the inclined-tube packing (18), and the supernatant is collected by the overflow weir (19) and discharged from the outlet (20). There is a sludge thickening zone below the inclined-tube sedimentation zone. The sludge scraper (11) drives the sludge scraping device (12) to scrape the sludge deposited on the inclined cone surface into the sludge hopper (10).

2. The structure of an inlaid high-efficiency sedimentation tank according to claim 1, characterized in that; The sludge hopper (10) is designed with a sludge discharge port externally connected to the sludge hopper valve (13) and the check valve (14), and is sucked out by the sludge pump (15). The outlet of the sludge pump (15) is divided into two paths. One sludge reflux pipe is controlled by the reflux valve (16) to flow back to the external diversion pipe (6) to improve the mixing and sedimentation efficiency. The other sludge discharge pipe is controlled by the sludge discharge valve (17) to be discharged externally to the sludge thickening tank for drying treatment.

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