Circulating precipitation device for sewage treatment

Abstract

The utility model belongs to the technical field of sewage treatment, and relates to a circulating sedimentation device for sewage treatment, which comprises a tank body, a stirring device, a feeding chamber and a backflow device, the tank body is divided into a coagulation tank, a flocculation tank and a sedimentation tank, the coagulation tank is provided with a water inlet pipe and is communicated with the flocculation tank through a water outlet at the bottom of a partition plate; the flocculation basin is communicated with the sedimentation basin through an overflow port in the top of the clapboard; the stirring device comprises a motor, a stirring shaft and blades and extends into the coagulating basin and the flocculation basin; the feeding chamber is divided into two chambers which respectively correspond to the coagulating basin and the flocculating basin, and a flocculating agent feeding box, a sludge separator and a coagulant aid feeding box are arranged in the feeding chamber; the reflux device is connected with a sludge discharge port at the bottom of the sedimentation tank and the feeding chamber, comprises a reflux pump and a reflux pipe and realizes sludge recycling; the stirring devices and the turbulent flow columns are additionally arranged in the coagulating basin and the sedimentation basin, so that the phenomenon that the flow speed of sewage is too high or too low in the flowing process is avoided, the phenomenon of short flow of the sewage in the treatment stage is avoided, and the treatment efficiency of sewage treatment is improved.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a circulating sedimentation device used in wastewater treatment. Background Technology

[0002] A sedimentation tank is a structure that uses sedimentation to remove suspended solids from water, thus purifying the water. It utilizes the natural sedimentation or coagulation sedimentation process to remove suspended solids from the water.

[0003] In existing technologies, the water flow entering the sedimentation tank is prone to short-circuiting. Short-circuiting reduces the residence time of some water, preventing it from settling sufficiently and reducing sedimentation efficiency; while the residence time of other water may be very long, even resulting in a stagnant zone where the water flow is basically still, reducing the effective volume of the sedimentation tank. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a circulating sedimentation device for wastewater treatment.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0006] A circulating sedimentation device for wastewater treatment includes a tank body, a stirring device, a feeding chamber, and a reflux device. The tank body is divided into a coagulation tank, a flocculation tank, and a sedimentation tank. The coagulation tank is equipped with an inlet pipe. The coagulation tank and the flocculation tank are connected through a bottom outlet of a partition. Turbulence columns are installed on the side walls of the coagulation tank and the flocculation tank. The flocculation tank and the sedimentation tank are connected through an overflow outlet at the top of the partition. The feeding chamber is located above the tank body. The stirring device is installed in the feeding chamber and extends into the coagulation tank and the flocculation tank. The reflux device connects the sludge discharge port at the bottom of the sedimentation tank to the feeding chamber.

[0007] Furthermore, the bottom of the sedimentation tank is bucket-shaped with a sludge discharge port at the bottom, and a filter inclined plate is installed above the sedimentation tank. A water outlet is opened in the tank body above the filter inclined plate.

[0008] Furthermore, the stirring device includes a motor, a stirring shaft, and stirring blades. The motor is installed in the feeding chamber, the stirring shaft is installed in the tank, the power output end of the motor is connected to the power input end of the stirring shaft, and the stirring blades are installed on the stirring shaft.

[0009] Furthermore, the feeding chamber includes a flocculant feeding box, a sludge separator, and a coagulant aid feeding box. The feeding chamber is divided into two chambers corresponding to the coagulation tank and the flocculation tank respectively. The flocculant feeding box is fixed in the feeding chamber. The sludge separator and the coagulant aid feeding box are installed in the feeding chamber above the flocculation tank. The discharge port of the sludge separator is connected to the flocculant feeding box, and the sludge discharge port of the sludge separator extends out of the housing.

[0010] Furthermore, the reflux device includes a reflux pump and a reflux pipe. The sludge discharge port at the bottom of the sedimentation tank is connected to the reflux pump, and the two ends of the reflux pipe are respectively connected to the outlet of the reflux pump and the inlet of the sludge separator.

[0011] According to the above technical solution, the beneficial effects of this utility model are as follows: This utility model adds a stirring device and a turbulence column to the coagulation tank and sedimentation tank, so that the sewage will not flow too fast or too slow during the flow process, avoid short-flow phenomenon in the sewage treatment stage, and improve the treatment efficiency of sewage treatment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a circulating sedimentation device used in wastewater treatment.

[0013] Figure 2 This is a schematic diagram of the internal structure of a circulating sedimentation device used in wastewater treatment.

[0014] 1-Pool body; 11-Coagulation tank; 111-Inlet pipe; 12-Flocculation tank; 13-Sedimentation tank; 131-Sludge discharge port; 132-Filter inclined plate; 14-Turbulence column; 2-Agitator; 21-Motor; 22-Agitator shaft; 23-Agitator blades; 3-Feeding chamber; 31-Flocculant feeding box; 32-Sludge separator; 33-Coagulant feeding box; 4-Recirculation device; 41-Recirculation pump; 42-Recirculation pipe. Detailed Implementation

[0015] To more clearly illustrate the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0016] See Figure 1-2 A circulating sedimentation device for wastewater treatment includes a tank body 1, a stirring device 2, a feeding chamber 3, and a return device 4. The tank body 1, as the main site for wastewater treatment, is divided into a coagulation tank 11, a flocculation tank 12, and a sedimentation tank 13 to ensure the orderly flow of wastewater at different treatment stages. The stirring device 2 is installed in the feeding chamber 3 and extends into the coagulation tank 11 and the flocculation tank 12 to stir and promote the full mixing of coagulant and flocculant with wastewater, avoiding short-circuiting during sedimentation. The feeding chamber 3 is located above the tank body 1 and is used to add coagulant and flocculant to ensure uniform distribution of the agents. The return device 4 connects the sludge discharge port 131 at the bottom of the sedimentation tank 13 to the feeding chamber 3, returning the settled sludge to the feeding chamber for reuse or further treatment.

[0017] See Figure 1-2The pool body 1 is divided into a coagulation tank 11, a flocculation tank 12, and a sedimentation tank 13. The coagulation tank 11 is equipped with an inlet pipe 111. The coagulation tank 11 and the flocculation tank 12 are connected through a bottom outlet of a partition. Turbulence columns 14 are installed on the side walls of the coagulation tank 11 and the flocculation tank 12. The flocculation tank 12 and the sedimentation tank 13 are connected through an overflow outlet at the top of the partition. A feeding chamber 3 is located above the pool body 1. A stirring device 2 is installed in the feeding chamber 3 and extends into the coagulation tank 11 and the flocculation tank 12. A reflux device 4 connects the sludge discharge port 131 at the bottom of the sedimentation tank 13 and the feeding chamber 3. The division of the pool body 1 into the coagulation tank 11, flocculation tank 12, and sedimentation tank 13 ensures the orderly flow of wastewater at different treatment stages, improving treatment efficiency. The coagulation tank 11 is equipped with an inlet pipe 111 to introduce wastewater to be treated, ensuring stable water flow. The coagulation tank 11 and the flocculation tank 12 are connected through a bottom outlet of a partition. The system ensures that water flows smoothly from the coagulation tank 11 into the flocculation tank 12, avoiding water flow impact. Turbulence columns 14 are installed on the side walls of the coagulation tank 11 and the flocculation tank 12 to prevent short-circuiting of the water flow and ensure thorough mixing of the coagulant and flocculant with the wastewater. The flocculation tank 12 and the sedimentation tank 13 are connected by an overflow outlet at the top of a partition, ensuring smooth water flow into the sedimentation tank 13, avoiding water flow impact, and improving sedimentation efficiency. The feeding chamber 3 is located above the tank body 1, facilitating the addition of coagulant and flocculant and ensuring uniform distribution of the agents. The stirring device 2 is installed inside the feeding chamber 3 and extends into the coagulation tank 11 and the flocculation tank 12, promoting thorough mixing of the coagulant and flocculant with the wastewater through stirring, and preventing short-circuiting during sedimentation. The return device 4 connects the sludge discharge port 131 at the bottom of the sedimentation tank 13 to the feeding chamber 3, returning the settled sludge to the feeding chamber for reuse or further treatment.

[0018] See Figure 1-2 The sedimentation tank 13 has a bucket-shaped bottom with a sludge discharge port 131. A filter inclined plate 132 is installed above the sedimentation tank 13, and a water outlet is provided in the tank body 1 above the filter inclined plate 132. The bucket-shaped bottom of the sedimentation tank 13 facilitates the collection and discharge of sludge, improving sludge collection efficiency. The sludge discharge port 131 at the bottom is used to discharge the settled sludge, ensuring the normal operation of the sedimentation tank. The filter inclined plate 132 installed above the sedimentation tank 13 further improves the sedimentation effect through the filtration action of the filter inclined plate, ensuring the quality of the effluent. The water outlet in the tank body 1 above the filter inclined plate 132 is used to discharge the treated clean water, ensuring smooth water flow.

[0019] See Figure 1-2The stirring device 2 includes a motor 21, a stirring shaft 22, and stirring blades 23. The motor 21 is installed in the feeding chamber 3, and the stirring shaft 22 is installed in the tank body 1. The power output end of the motor 21 is connected to the power input end of the stirring shaft 22, and the stirring blades 23 are installed on the stirring shaft 22. The motor 21, installed in the feeding chamber 3, provides power to the stirring device, ensuring the continuity and stability of the stirring process. The stirring shaft 22, installed in the tank body 1, drives the stirring blades 23 to rotate through the motor 21, ensuring that the coagulant and flocculant are fully mixed with the wastewater. The stirring blades 23, installed on the stirring shaft 22, promote the full mixing of the coagulant and flocculant with the wastewater through rotation and stirring, avoiding short-circuiting during sedimentation.

[0020] See Figure 1-2 The feeding chamber 3 includes a flocculant feeding box 31, a sludge separator 32, and a coagulant aid feeding box 33. The feeding chamber 3 is divided into two chambers corresponding to the coagulation tank 11 and the flocculation tank 12 respectively. The flocculant feeding box 31 is fixed inside the feeding chamber 3. The sludge separator 32 and the coagulant aid feeding box 33 are installed in the feeding chamber 3 above the flocculation tank 12. The discharge port of the sludge separator 32 is connected to the flocculant feeding box 31, and the discharge port of the sludge separator 32 extends out of the chamber. The flocculant feeding box 31 is used to add flocculant to ensure the flocculant... The sludge separator 32 is used to separate sludge and improve the efficiency of sludge recycling. The coagulant feeding box 33 is used to add coagulant to further improve the coagulation effect. The feeding chamber 3 is divided into two chambers corresponding to the coagulation tank 11 and the flocculation tank 12 respectively, to ensure the rational distribution and use of the agent and improve the treatment effect. The discharge port of the sludge separator 32 is connected to the flocculant feeding box 31, so that the separated sludge is returned to the flocculant feeding box for reuse. The sewage outlet of the sludge separator 32 extends out of the box body to facilitate sludge discharge and treatment.

[0021] See Figure 1-2 The reflux device 4 includes a reflux pump 41 and a reflux pipe 42. The sludge discharge port 131 at the bottom of the sedimentation tank 13 is connected to the reflux pump 41, and the two ends of the reflux pipe 42 are respectively connected to the outlet of the reflux pump 41 and the inlet of the sludge separator 32. The reflux pump 41 is used to extract the sludge from the bottom of the sedimentation tank 13 for reflux or further treatment. The reflux pipe 42 connects the reflux pump 41 and the sludge separator 32 to ensure smooth sludge flow. The reflux device 4, through the reflux pump 41 and the reflux pipe 42, returns the settled sludge to the feeding chamber 3 for reuse or further treatment, thereby improving the sludge utilization efficiency and reducing sludge discharge.

[0022] According to the above embodiments, the working process of this utility model is as follows:

[0023] Wastewater enters coagulation tank 11 through inlet pipe 111. In coagulation tank 11, stirring device 2, driven by motor 21, rotates stirring shaft 22 and stirring blades 23, ensuring thorough mixing of coagulant and wastewater to form tiny flocs. Coagulation tank 11 is connected to flocculation tank 12 via an outlet at the bottom of a baffle. The water flow is prevented from short-circuiting by turbulence column 14, ensuring a smooth flow into flocculation tank 12. In flocculation tank 12, more flocculant is added, and stirring device 2 continues to operate, further enlarging the flocs. Flocculation tank 12 is connected to sedimentation tank 13. Water flows smoothly into sedimentation tank 13 through the overflow port at the top of the partition. The bottom of sedimentation tank 13 is funnel-shaped, which facilitates the collection and discharge of sludge. Filter plates 132 are installed in the tank to further improve the sedimentation effect. The clear water after sedimentation is discharged through the outlet, while the sludge is returned to the feeding chamber 3 through the sludge discharge port 131 and the return device 4 for reuse or further treatment. Throughout the process, the stirring device 2 and the turbulence column 14 work together to ensure that the coagulant and flocculant are fully mixed with the sewage, avoid short-circuiting during sedimentation, and improve sewage treatment efficiency.

[0024] The above-disclosed embodiments of the present invention are only for illustrating the present invention. The preferred embodiments do not describe all details exhaustively, nor do they limit the present invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A circulating sedimentation device for wastewater treatment, characterized in that: Includes a tank body (1), a stirring device (2), a feeding chamber (3), and a reflux device (4); The pool body (1) is divided into a coagulation pool (11), a flocculation pool (12), and a sedimentation pool (13). The coagulation pool (11) is equipped with an inlet pipe (111). The coagulation pool (11) and the flocculation pool (12) are connected through the bottom outlet of the partition. The side walls of the coagulation pool (11) and the flocculation pool (12) are equipped with turbulence columns (14). The flocculation pool (12) and the sedimentation pool (13) are connected through the top overflow port of the partition. The feeding chamber (3) is located above the pool body (1). The stirring device (2) is installed in the feeding chamber (3) and extends into the coagulation pool (11) and the flocculation pool (12). The return device (4) is connected to the sludge discharge port (131) at the bottom of the sedimentation pool (13) and the feeding chamber (3).

2. The circulating sedimentation device for wastewater treatment according to claim 1, characterized in that: The bottom of the sedimentation tank (13) is shaped like a bucket, and a sludge discharge port (131) is provided at the bottom. A filter inclined plate (132) is installed above the sedimentation tank (13), and a water outlet is provided in the tank body (1) above the filter inclined plate (132).

3. The circulating sedimentation device for wastewater treatment according to claim 1, characterized in that: The stirring device (2) includes a motor (21), a stirring shaft (22), and stirring blades (23). The motor (21) is installed in the feeding chamber (3), the stirring shaft (22) is installed in the tank body (1), the power output end of the motor (21) is connected to the power input end of the stirring shaft (22), and the stirring blades (23) are installed on the stirring shaft (22).

4. The circulating sedimentation device for wastewater treatment according to claim 1, characterized in that: The feeding chamber (3) includes a flocculant feeding box (31), a sludge separator (32), and a coagulant aid feeding box (33). The feeding chamber (3) is divided into two chambers corresponding to the coagulation tank (11) and the flocculation tank (12) respectively. The flocculant feeding box (31) is fixed in the feeding chamber (3). The sludge separator (32) and the coagulant aid feeding box (33) are installed in the feeding chamber (3) above the flocculation tank (12). The discharge port of the sludge separator (32) is connected to the flocculant feeding box (31), and the discharge port of the sludge separator (32) extends out of the box.

5. The circulating sedimentation device for wastewater treatment according to claim 1, characterized in that: The reflux device (4) includes a reflux pump (41) and a reflux pipe (42). The sludge discharge port (131) at the bottom of the sedimentation tank (13) is connected to the reflux pump (41), and the two ends of the reflux pipe (42) are connected to the outlet of the reflux pump (41) and the inlet of the sludge separator (32), respectively.

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