A hierarchical sewage purification system

Abstract

The utility model discloses a hierarchical sewage purification system, including a primary treatment subsystem, a secondary treatment subsystem and a tertiary treatment subsystem, wherein the primary treatment subsystem includes a filter tank, a sand settling tank and a primary sedimentation tank, the secondary treatment subsystem includes a secondary sedimentation tank, and the tertiary treatment subsystem includes a coagulation sedimentation tank, an adsorption tank and a disinfection tank; further comprising a cache box, wherein the cache box includes an inlet and an outlet 1, wherein the inlet is connected to a water inlet pipe, wherein the water inlet pipe is connected to two branch pipes, and the two branch pipes are respectively connected to the bottom of the secondary sedimentation tank and the coagulation sedimentation tank; wherein the outlet 1 is connected to a mud discharge pipe, and the mud discharge pipe is connected to the primary sedimentation tank. The utility model can separate and treat sewage, can treat the precipitated impurities in the sewage for multiple times, and can effectively realize sewage treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, and more specifically, to a graded sewage purification system. Background Art

[0002] In the field of industrial wastewater treatment, we face challenges of various pollutants, including silt, particle precipitation, toxic and harmful chemicals, and organic pollutants. Among them, particle precipitation is particularly common. They are mixed in the sewage, making the water turbid. In order to deal with this problem, the traditional treatment method is usually to use filtration or precipitation.

[0003] The sedimentation method can effectively separate the solid and liquid in sewage. The treatment effect of impurities in sewage through single sedimentation is limited. In addition, it will prolong the time of single sedimentation and affect the treatment efficiency of sewage. Therefore, in actual process projects, sewage is often treated multiple times to gradually improve the fineness of the treatment and finally meet the requirements of sewage treatment.

[0004] However, in the process of multiple separation treatments, especially the sedimentation treatment, corresponding sediment residues will be produced, and the sediment residues in each tank need to be discharged and treated separately. The state of the sediment residues and the content of sediments at the bottom of treatment tanks of different levels are also different, and they often need to be treated separately. For example, there are relatively more sediment residues in the first few processes of sewage treatment, and the solid content in the muddy water at the bottom is relatively high, which can be directly formed into solid impurities by scraping or squeezing; while in the last few processes of sewage treatment, the sediment is usually less, but there is still muddy water at the bottom, but its solid content is low and cannot meet the technical requirements of extrusion separation. Therefore, it is often only possible to treat the muddy water in different processes separately.

[0005] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a graded sewage purification system capable of separating and treating sewage and treating precipitated impurities in the sewage multiple times.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hierarchical sewage purification system, including a primary treatment subsystem, a secondary treatment subsystem and a tertiary treatment subsystem, the primary treatment subsystem includes a filter tank, a grit tank and a primary sedimentation tank, the secondary treatment subsystem includes a secondary sedimentation tank, and the tertiary treatment subsystem includes a coagulation sedimentation tank, an adsorption tank and a disinfection tank; it also includes a cache box, the cache box includes an inlet and an outlet one, the inlet is connected to a water inlet pipe, the water inlet pipe is connected to two branches, and the two branches are respectively connected to the bottom of the secondary sedimentation tank and the coagulation sedimentation tank; the outlet one is connected to a mud discharge pipe, and the mud discharge pipe is connected to the primary sedimentation tank.

[0008] The utility model is further configured such that the cache box also includes a second outlet, the second outlet is connected to a drain pipe, and the drain pipe is connected to a secondary sedimentation tank; the drain pipe is provided with a water pump, and the water pump is used to pump toward the secondary sedimentation tank.

[0009] The utility model is further configured such that the first outlet is located at the bottom of the buffer box, the second outlet is located at the upper part of the buffer box, and the inlet is located between the first outlet and the second outlet.

[0010] The utility model is further configured such that a blocking module 1 and a blocking module 2 are provided in the cache box, wherein the blocking module 1 is located in the cache box at a position corresponding to between the inlet and the outlet 1, and the blocking module 2 is located in the cache box at a position corresponding to between the inlet and the outlet 2.

[0011] The utility model is further configured that the blocking module 1 includes a plurality of baffles 1, the baffles 1 are arranged in an inclined manner, and the baffles 1 are arranged parallel to each other.

[0012] The utility model is further configured that the blocking module 2 includes a plurality of baffles 2, the baffles 2 are arranged obliquely, and the baffles 2 are arranged parallel to each other; the gap between adjacent baffles 2 is smaller than the gap between adjacent baffles 1.

[0013] The utility model is further configured such that the inclination direction of the second baffle is opposite to the inclination direction of the first baffle.

[0014] The utility model is further configured such that the water inlet pipe is provided with a pump device, and the pump device is used to pump from the branch pipe toward the inlet direction; it also includes a bypass pipe, a first end of the bypass pipe is connected to the position of the water inlet pipe corresponding to the pump device and the inlet, and a second end is connected to the mud discharge pipe.

[0015] The utility model is further configured that the water inlet pipe is provided with a valve 1 at a position corresponding to between the pump device and the inlet, and the bypass pipe is provided with a valve 2.

[0016] The utility model is further configured that the mud discharge pipe is provided with a valve three, and the position where the bypass pipe is connected to the mud discharge pipe is located between the valve three and the outlet one.

[0017] In summary, the utility model has the following beneficial effects:

[0018] The sewage treatment system consists of three hierarchical subsystems, which are designed to gradually remove impurities from sewage to meet reuse or discharge standards. The primary subsystem mainly performs preliminary separation filtration and preliminary sedimentation, effectively removing large lumps and large particles of impurities in sewage. The secondary subsystem further precipitates and separates, significantly reducing most of the impurities in sewage. The tertiary subsystem plays a refined treatment role, coagulating the sewage by adding flocculants to remove suspended particles and small particles. Then, it is adsorbed by activated carbon in the adsorption tank, and then disinfected in the disinfection tank to ensure that the sewage quality meets the requirements.

[0019] In these three subsystems, there are sedimentation-related tanks, which produce corresponding sediments during the treatment process. In order to effectively gather the sediment residues, the sediment residues at the bottom of the secondary sedimentation tank and the sludge sedimentation tank are transported to the primary sedimentation tank through pipelines for recycling and sedimentation again, thus realizing the centralized treatment of sediment residues. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a hierarchical sewage purification system in this embodiment;

[0021] Figure 2 This is a schematic diagram of the structure of the primary sedimentation tank, the secondary sedimentation tank and the coagulation sedimentation tank in this embodiment;

[0022] Figure 3 Schematic diagram of the structure of the cache box in this embodiment.

[0023] Figure numerals: 1. Cache box; 11. Inlet; 12. Outlet one; 13. Outlet two; 14. Blocking module one; 141. Baffle one; 15. Blocking module two; 151. Baffle two; 2. Water inlet pipe; 21. Branch pipe; 3. Mud discharge pipe; 4. Drain pipe; 5. Pump device; 6. Bypass pipe; 7. Valve one; 8. Valve two; 9. Valve three. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] This embodiment discloses a hierarchical sewage purification system, referring to Figure 1 As shown, it includes a filtration tank, a grit tank, a primary sedimentation tank, a secondary sedimentation tank, a coagulation sedimentation tank, an adsorption tank and a disinfection tank. Each tank body is divided into three subsystems, namely a primary treatment subsystem, a secondary treatment subsystem and a tertiary treatment subsystem, which can carry out three-stage treatment of sewage. Among them, the primary treatment subsystem includes a filtration tank, a grit tank and a primary sedimentation tank, the secondary treatment subsystem includes a secondary sedimentation tank, and the tertiary treatment subsystem includes a coagulation sedimentation tank, an adsorption tank and a disinfection tank.

[0026] The first-level subsystem separates, filters and precipitates the sewage to remove large pieces and large particles of impurities; the second-level subsystem further precipitates and separates the sewage to remove most of the impurities in the sewage; the tertiary subsystem refines the sewage by adding flocculants to coagulate it to remove suspended particles and small particles of impurities, and then performs activated carbon adsorption and disinfection on the sewage, so that the sewage can finally meet the requirements for reuse or discharge.

[0027] There are sedimentation-related tanks in all three subsystems, and corresponding sedimentation will occur during the treatment process. The sedimentation residue at the bottom of the secondary sedimentation tank and the sludge sedimentation tank is discharged and transported to the primary sedimentation tank through pipelines for circulation sedimentation again, thereby achieving the concentration of sedimentation residue.

[0028] Reference Figure 2 As shown, the graded sewage evolution system also includes a cache box 1, which includes an inlet 11, an outlet 1 12 and an outlet 2 13. The inlet 11 is connected to an inlet pipe 2, and the inlet pipe 2 is connected to two branch pipes 21, which are connected to the inlet pipe 2 through a three-way structure. The two branch pipes 21 are respectively connected to the bottom of the secondary sedimentation tank and the coagulation sedimentation tank. In addition, a pump device 5 is installed on the inlet pipe 2. Through the pumping action of the pump device 5, the sediment residue at the bottom of the secondary sedimentation tank and the coagulation sedimentation tank can be discharged, so that the sediment residue can flow back to the cache box 1 first.

[0029] The sediment is in the buffer box 1, where large particles of impurities gather downward and relatively clear liquid gathers upward. The lower layer of mud is passed into the primary sedimentation tank for re-sedimentation treatment, while the upper layer of clear liquid is discharged into the secondary sedimentation tank for re-treatment. Through the circulation treatment, the sediment and impurities in the sewage can be removed as much as possible, and the solid-liquid separation can be effectively achieved.

[0030] The first outlet 12 is located at the bottom of the cache box 1 , the second outlet 13 is located at the top of the cache box 1 , and the inlet 11 is located between the first outlet 12 and the second outlet 13 , approximately in the middle of the cache box 1 .

[0031] The outlet 12 is connected to a mud discharge pipe 3, and the drain pipe 4 is connected to the primary sedimentation tank. The mud residue accumulated in the cache box 1 can be discharged into the primary sedimentation tank through the mud discharge pipe 3. Specifically, it can be driven by a separate pump for pumping. The outlet 2 13 is connected to a drain pipe 4, and the drain pipe 4 is connected to the secondary sedimentation tank; the drain pipe 4 is provided with a water pump, and through the pumping action of the water pump, the clear liquid on the upper side of the cache box 1 can be pumped toward the secondary sedimentation tank to realize the circulation of the clear liquid. The clear liquid and mud residue in the cache box 1 can be separated by two sets of pipelines to prevent excessive clear liquid from entering the primary sedimentation tank and generating unnecessary circulation process.

[0032] In addition, a blocking module 14 and a blocking module 2 15 are provided in the cache box 1. The blocking module 1 14 is located at a position corresponding to between the inlet 11 and the outlet 1 12 in the cache box 1, and the blocking module 2 15 is located at a position corresponding to between the inlet 11 and the outlet 2 13 in the cache box 1. The blocking module 1 14 and the blocking module 2 15 can reduce the flow rate of water and play a role in blocking flow. The muddy water entering the cache box 1 from the inlet 11 will first enter the blocking module 1 14 and the blocking module 2 15, slowing down the movement of the water flow and preventing the muddy water from disturbing the clear liquid on the upper side of the cache box 1 and the mud residue gathered in the lower layer.

[0033] Reference Figure 3 As shown, the blocking module 14 includes a plurality of baffles 141, which are arranged in an inclined manner, and each baffle 141 is arranged parallel to each other. The blocking module 2 15 includes a plurality of baffles 151, which are arranged in an inclined manner, and each baffle 151 is arranged parallel to each other. The gap width between adjacent baffles 141 is relatively large, and the gap between adjacent baffles 2 151 is smaller. After the precipitated slag enters between the blocking module 14 and the blocking module 2 15 from the inlet 11, the precipitated slag can smoothly fall from the gap between the baffles 141, and the baffles 2 151 of the blocking module 2 15 can limit the upward movement of the precipitate, and the relatively clear clear liquid can gather to the upper layer of the buffer tank, which is conducive to the clear liquid gathering and discharge.

[0034] Since the baffle 1 141 and the baffle 2 151 are both in an inclined state, the water flow in the middle can be blocked when it moves in both the upward and downward directions, and the sediment residue can slowly gather to the lower side of the blocking module 14, that is, the bottom position of the buffer box 1, under the influence of its own gravity. Moreover, the inclination direction of the baffle 2 151 is opposite to that of the baffle 1 141. When the water flow in the vertical direction and the impurities in the water move in the upward and downward directions, the baffle 1 141 and the baffle 2 151 with different inclination directions can form two blocks and direction changes, which can reduce the mechanical energy of the water flow and impurities, and facilitate the sediment to gather and sink to the bottom.

[0035] A pump device 5 is provided at the water inlet pipe 2 , and the pump device 5 provides power for conveying water flow at the water inlet pipe 2 , and can pump water from the branch pipe 21 toward the inlet 11 .

[0036] In addition, a bypass pipe 6 is provided between the water inlet pipe 2 and the mud discharge pipe 3. The first end of the bypass pipe 6 is connected to the position of the water inlet pipe 2 corresponding to the pump device 5 and the inlet 11, and the second end is connected to the mud discharge pipe 3. The mud residue output from the secondary sedimentation tank and the coagulation sedimentation tank can be directly introduced into the mud discharge pipe 3 through the bypass pipe 6 without passing through the buffer box 1. When the pressure of mud and water separation in the buffer box 1 is relatively high, if sewage is continuously introduced into the buffer box 1, the clear liquid in the upper layer of the buffer box 1 will become obviously turbid, making it difficult for the buffer box 1 to play the role of buffer separation. Therefore, direct discharge can be temporarily performed through the bypass pipe 6.

[0037] The water inlet pipe 2 is provided with a valve 1 7 at a position corresponding to the position between the pump device 5 and the inlet 11, and the bypass pipe 6 is provided with a valve 2 8. By switching the valve 1 7 and the valve 2 8, the route through which the sewage flows can be selected, and the buffer box 1 can be connected to the pipeline, or the buffer box 1 can be temporarily separated from the pipeline.

[0038] In addition, a valve 3 9 is provided on the mud discharge pipe 3, and the position where the bypass pipe 6 is connected to the mud discharge pipe 3 is located between the valve 3 9 and the outlet 12. The valve 3 9 is in a normally open state, so that the mud water transported from the mud discharge pipe 3 can smoothly flow back to the primary sedimentation tank to continue the subsequent circulation sedimentation treatment. When the valve 3 9 is closed, the mud discharge pipe 3 will be cut off, and at the same time, the valve 1 7 can also be cut off, and the valve 2 8 is opened. At this time, the water flow input by the pump device 5 will pass through the bypass pipe 6 and directly enter the bottom of the buffer tank from the outlet 12 of the buffer tank. The input of large water flow can backwash the bottom of the buffer tank, play a role in flushing the area near the outlet 12, and at the same time, it can also backwash the lower side of the baffle 141.

[0039] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hierarchical sewage purification system, characterized in that: The invention comprises a primary treatment subsystem, a secondary treatment subsystem and a tertiary treatment subsystem, wherein the primary treatment subsystem comprises a filtration tank, a grit chamber and a primary sedimentation tank, the secondary treatment subsystem comprises a secondary sedimentation tank, and the tertiary treatment subsystem comprises a coagulation sedimentation tank, an adsorption tank and a disinfection tank; the invention also comprises a buffer box (1), wherein the buffer box (1) comprises an inlet (11) and an outlet (12), wherein the inlet (11) is connected to a water inlet pipe (2), wherein the water inlet pipe (2) is connected to two branch pipes (21), wherein the two branch pipes (21) are respectively connected to the bottom of the secondary sedimentation tank and the coagulation sedimentation tank; and the outlet (12) is connected to a mud discharge pipe (3), wherein the mud discharge pipe (3) is connected to the primary sedimentation tank.

2. A hierarchical sewage purification system according to claim 1, characterized in that: The cache box (1) also includes a second outlet (13), the second outlet (13) is connected to a drainage pipe (4), and the drainage pipe (4) is connected to a secondary sedimentation tank; the drainage pipe (4) is provided with a water pump, and the water pump is used to pump toward the secondary sedimentation tank.

3. A hierarchical sewage purification system according to claim 2, characterized in that: The outlet one (12) is located at the bottom of the buffer box (1), the outlet two (13) is located at the upper part of the buffer box, and the inlet (11) is located between the outlet one (12) and the outlet two (13).

4. A hierarchical sewage purification system according to claim 3, characterized in that: The cache box (1) is provided with a blocking module one (14) and a blocking module two (15); the blocking module one (14) is located at a position corresponding to between the inlet (11) and the outlet one (12) in the cache box (1); and the blocking module two (15) is located at a position corresponding to between the inlet (11) and the outlet two (13) in the cache box (1).

5. A hierarchical sewage purification system according to claim 4, characterized in that: The blocking module (14) comprises a plurality of baffles (141), wherein the baffles (141) are arranged in an inclined manner, and the baffles (141) are arranged parallel to each other.

6. A hierarchical sewage purification system according to claim 5, characterized in that: The blocking module 2 (15) comprises a plurality of baffles 2 (151), wherein the baffles 2 (151) are arranged in an inclined manner, and each baffle 2 (151) is arranged parallel to each other; and the gap between adjacent baffles 2 (151) is smaller than the gap between adjacent baffles 1 (141).

7. A hierarchical sewage purification system according to claim 6, characterized in that: The inclination direction of the baffle plate 2 (151) is opposite to the inclination direction of the baffle plate 1 (141).

8. A hierarchical sewage purification system according to claim 1, characterized in that: The water inlet pipe (2) is provided with a pump device (5) for pumping from the branch pipe (21) in the direction of the inlet (11); and further comprises a bypass pipe (6), wherein a first end of the bypass pipe (6) is connected to a position of the water inlet pipe (2) corresponding to the pump device (5) and the inlet (11), and a second end is connected to the mud discharge pipe (3).

9. A hierarchical sewage purification system according to claim 8, characterized in that: The water inlet pipe (2) is provided with a valve one (7) at a position corresponding to between the pump device (5) and the inlet (11), and the bypass pipe (6) is provided with a valve two (8).

10. A hierarchical sewage purification system according to claim 9, characterized in that: The mud discharge pipe (3) is provided with a valve three (9), and the position where the bypass pipe (6) is connected to the mud discharge pipe (3) is located between the valve three (9) and the outlet one (12).

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