Sewage solid separation flotation device for environmental treatment

Abstract

The utility model discloses a solid separation flotation device for sewage in environmental treatment, which belongs to the technical field of sewage treatment and comprises a flotation box, a stirring tank, a dissolved air tank, a flotation tank, a filter residue tank and a clear water sedimentation tank are arranged in an inner cavity of the flotation box, and a mixing mechanism is arranged in the dissolved air tank; the novel mixing mechanism is arranged in the air dissolving tank of the sewage flotation equipment, the mixing motor drives the three groups of spiral shafts to rotate through the driving assembly, sewage and air dissolving water components in the three independent mixing barrels are mixed, sewage discharging power is improved, oil residues at an outlet are prevented from being blocked, sewage entering is not facilitated, and the service life of the sewage flotation equipment is prolonged. And moreover, air-dissolved water and bubbles sheared by spiral shaft blades can uniformly enter the sewage, the efficiency of separating suspended matters by bubble flotation is improved, the scraper at the bottom rotates synchronously to scrape mud, and the air dissolving device is kept to efficiently enter the air-dissolved water.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a solid separation flotation device for environmental treatment wastewater. Background Technology

[0002] Flotation machines are mainly used to remove suspended solids, oils, and other insoluble pollutants from wastewater. Their working principle involves injecting microbubbles into the wastewater; these bubbles attach to the pollutants, causing them to float to the surface for easy removal. This process is called air flotation and is an important technology in wastewater treatment.

[0003] In existing air flotation machines, when treating wastewater, the wastewater with added flotation agent is pre-treated and stirred by a stirring device to ensure that the flotation agent and wastewater are fully mixed before entering the dissolved air zone. The release device releases clear water containing air bubbles into the wastewater. The air bubbles combine with the suspended solids and float to the surface, then enter the flotation tank for further flotation separation.

[0004] The wastewater has a short mixing time in the dissolved air zone and flows horizontally from the top outlet into the flotation tank, where it mixes with the oil sludge flotated from the top of the flotation tank. This oil sludge not only affects the normal entry of subsequent wastewater into the flotation tank, but also increases the collection difficulty of the sludge scraping mechanism due to the increasing amount of oil sludge. In addition, due to the short mixing time, it is difficult for the air bubbles discharged from the dissolved air device to enter the wastewater evenly, reducing the efficiency of air bubble utilization. The sludge that settles to the bottom in the dissolved air zone also affects the normal entry of dissolved air water.

[0005] To address the aforementioned issues, a solids separation flotation device for wastewater treatment in environmental remediation is proposed. Utility Model Content

[0006] The main purpose of this invention is to provide a solid separation flotation device for wastewater treatment in environmental remediation, which solves the problems mentioned in the background art.

[0007] The objective of this utility model can be achieved by adopting the following technical solution:

[0008] A solid separation flotation device for wastewater treatment in environmental remediation includes a flotation tank, wherein the inner cavity of the flotation tank is provided with a stirring tank, a dissolved air tank, a flotation tank, a filter residue tank and a clear water sedimentation tank, and the dissolved air tank is provided with a mixing mechanism.

[0009] The mixing mechanism includes a mixing cylinder that is sealed and fixed to the inner wall of the dissolved gas tank. A spiral shaft is rotatably installed inside the mixing cylinder. A scraper is coaxially installed at the bottom of the spiral shaft. A dissolved gas plate is installed against the bottom of the scraper. The dissolved gas plate is embedded in the bottom of the dissolved gas tank. A drive assembly is sleeved on the top of the spiral shaft. A mixing motor is installed on one side of the drive assembly.

[0010] Furthermore, the mixing motor is fixed to the top of the flotation tank, and the outer edge of the spiral blades of the spiral shaft is 3-5 mm away from the inner wall of the mixing cylinder.

[0011] Furthermore, a water outlet is formed on the top of one side of the outer wall of the mixing cylinder, and a water inlet is formed on the bottom of the other side of the outer wall of the mixing cylinder.

[0012] Furthermore, the mixing tank is equipped with a mixing mechanism, and a partition plate is formed at the bottom of the mixing tank. The top of the partition plate is 25cm away from the top of the flotation tank. A sewage inlet pipe is inserted and connected to the outside side of the mixing tank.

[0013] Furthermore, a slag scraping mechanism is rotatably mounted on the top of the flotation tank via a bearing.

[0014] Furthermore, a movable filter frame is provided in the filter cake tank, the bottom of the filter cake frame is connected to the inside of the flotation tank, and a clear water discharge pipe is inserted into one side of the outer wall of the clear water sedimentation tank.

[0015] Furthermore, a dissolved air mechanism is provided on the outer wall of the flotation tank. The output pipe of the dissolved air mechanism is connected to the dissolved air plate, and the input pipe of the dissolved air mechanism is connected to the clear water discharge pipe through a tee.

[0016] The beneficial technical effects of this utility model are as follows:

[0017] This invention features a novel mixing mechanism installed in the dissolved air tank of a wastewater flotation device. A mixing motor drives three sets of spiral shafts to rotate via a drive assembly, mixing the wastewater and dissolved air water components in three independent mixing cylinders. This not only improves the power of wastewater discharge and avoids oil sludge blockage at the outlet, which hinders wastewater entry, but also allows dissolved air water, sheared by the spiral shaft blades, to evenly enter the wastewater, improving the efficiency of bubble flotation separation of suspended solids. The scraper at the bottom rotates synchronously to scrape sludge, ensuring efficient entry of dissolved air water into the dissolved air device. Attached Figure Description

[0018] Figure 1 This is a front view schematic diagram of a preferred embodiment of a wastewater solid separation flotation device for environmental treatment according to the present invention;

[0019] Figure 2 This is a bottom view schematic diagram of a preferred embodiment of a wastewater solid separation flotation device for environmental treatment according to the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the flotation tank after opening the top, according to a preferred embodiment of the wastewater solid separation flotation device for environmental treatment according to this utility model;

[0021] Figure 4This is a half-sectional schematic diagram of the dissolved air tank in a preferred embodiment of an environmental treatment wastewater solid separation flotation device according to the present invention;

[0022] Figure 5 This is a schematic diagram of the mixing mechanism in a preferred embodiment of an environmental treatment wastewater solid separation flotation device according to the present invention.

[0023] The annotations in the attached figures are explained as follows:

[0024] 1. Flotation tank; 101. Mixing tank; 102. Dissolved air tank; 103. Flotation tank; 104. Filter tank; 105. Clear water sedimentation tank; 2. Mixing mechanism; 3. Wastewater inlet pipe; 4. Mixing mechanism; 401. Mixing cylinder; 401a. Water outlet; 401b. Water inlet; 402. Mixing motor; 403. Drive assembly; 404. Spiral shaft; 405. Dissolved air plate; 406. Scraper; 5. Sludge scraping mechanism; 6. Dissolved air mechanism; 7. Clear water discharge pipe. Detailed Implementation

[0025] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0026] like Figures 1-5 As shown in the figure, the wastewater solid separation flotation device provided in this embodiment includes a flotation tank 1. The inner cavity of the flotation tank 1 is provided with a stirring tank 101, a dissolved air tank 102, a flotation tank 103, a filter cake tank 104, and a clear water sedimentation tank 105. A mixing mechanism 4 is provided in the dissolved air tank 102. The mixing mechanism 4 includes a mixing cylinder 401 that is sealed and fixedly installed to the inner wall of the dissolved air tank 102. A spiral shaft 404 is rotatably installed inside the mixing cylinder 401. A scraper 406 is coaxially installed at the bottom of the spiral shaft 404. A dissolved air plate 405 is installed at the bottom of the scraper 406. The dissolved air plate 405 is embedded in the bottom of the dissolved air tank 102. A drive assembly 403 is sleeved on the top of the spiral shaft 404. A mixing motor 402 is installed on one side of the drive assembly 403.

[0027] In the above structure, the scraper 406 rotates synchronously with the spiral shaft 404 to scrape and wash the water outlet 401a of the dissolved air plate 405, so as to prevent the sediment in the sewage from clogging the water outlet 401a and affecting the discharge of dissolved air water.

[0028] The mixing motor 402 is fixed to the top of the flotation tank 1. The outer edge of the spiral blades of the spiral shaft 404 is 3-5mm away from the inner wall of the mixing cylinder 401. This setting is based on the normal flow of sewage in the mixing cylinder 401. With the spiral pushing action of the spiral shaft 404 blades, the sewage discharge speed is increased. It can also achieve the shearing of suspended solids in the sewage after they are combined with the flotation agent, increase the distribution range of dissolved air water in the sewage, and make it evenly distributed inside the suspended solids.

[0029] A water outlet 401a is formed on the top of one side of the outer wall of the mixing cylinder 401, and a water inlet 401b is formed on the bottom of the other side of the outer wall of the mixing cylinder 401. The water inlet 401b is used to enter sewage, and the water outlet 401a is used to discharge sewage.

[0030] A stirring mechanism 2 is installed inside the stirring tank 101. A partition plate is formed at the bottom of the stirring tank 101. The top of the partition plate is 25cm away from the top of the flotation tank 1. A sewage inlet pipe 3 is inserted and connected to the outside of the stirring tank 101. The stirring mechanism 2 consists of a stirring motor and a stirring frame. A flotation agent dropper is installed on one side of the stirring motor to achieve full mixing of sewage and flotation agent.

[0031] A scraping mechanism 5 is rotatably installed on the top of the flotation tank 103 via bearings. The scraping mechanism 5 consists of a chain conveyor, an elastic scraper, and a drive motor. After the elastic scraper scrapes the oil residue onto the inclined plate, it scrapes the oil residue into the collection device through elastic and moving action, and then rotates to scrape the residue in a cyclic manner.

[0032] A movable filter frame is installed in the filter cake tank 104. The bottom of the filter cake frame is connected to the inside of the flotation tank 103. A clear water discharge pipe 7 is inserted into one side of the outer wall of the clear water sedimentation tank 105. The filter cake frame can be moved to discharge sludge. After filtering the oil sludge at the bottom, the sewage re-enters the flotation tank 103. In the flotation tank 103, the upper layer of oil sludge floats to the top and is treated by the sludge scraping mechanism 5 through the flotation action of air bubbles. The bottom sludge is discharged by the sludge treatment mechanism. The clear water in the middle is drawn into the clear water sedimentation tank 105 through the water pump and pipe for further sedimentation and is finally discharged from the clear water discharge pipe 7.

[0033] A dissolved air mechanism 6 is installed on the outer wall of the flotation tank 1. The dissolved air mechanism 6 consists of a pump body, a venturi tube, and a dissolved air tank. When high-pressure water flows through the venturi tube, it draws in external air, injects it into the dissolved air tank, mixes it with the clean water, and then inputs it into the wastewater. Through the pressure reduction effect, dense fine bubbles are formed. The output pipe of the dissolved air mechanism 6 is connected to the dissolved air plate 405, and the input pipe of the dissolved air mechanism 6 is connected to the clean water discharge pipe 7 through a tee to replenish the dissolved air mechanism 6 with clean water.

[0034] The working principle of this device is as follows: When in use, this device is connected to an external power supply and an external control device.

[0035] Wastewater with excessively large particles is pretreated and fed into the flotation tank 1 through the wastewater inlet pipe 3. It first enters the mixing tank 101, where the flotation agent is mixed with the wastewater by the stirring mechanism 2, causing the suspended solids in the wastewater to aggregate. The aggregated solids then flow into the dissolved air tank 102 along with the wastewater flow. The dissolved air enters the mixing cylinder 401 through the water inlet 401b on one side of the bottom. Simultaneously, dissolved air water from the dissolved air mechanism 6 is introduced through the dissolved air plate 405. The dissolved air water is discharged from the dissolved air plate 405 and mixed with the wastewater. The mixing motor 402 drives the screw shaft 404 to rotate synchronously through the drive assembly 403. The process accelerates the upward discharge of sewage in the three mixing cylinders 401, while also shearing the sewage internally, dispersing and pressing air bubbles evenly into various positions within the sewage, and finally discharging them from the outlet hole 401a into the flotation tank 103 for further flotation separation. The air bubbles carry away small suspended solids, which rise and accumulate, and are then scraped into the filter tank 104 by the chain plate scraper of the scraping mechanism 5, further filtering the sewage. Large suspended solids settle at the bottom of the flotation tank 103 and are removed by the sludge scraping mechanism. The clear water in the middle is pumped into the clear water sedimentation tank 105 and discharged through the clear water discharge pipe 7.

[0036] The above are merely further embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed by this utility model, based on the technical solution and concept of this utility model, shall fall within the protection scope of this utility model.

Claims

1. An environmental remediation wastewater solids separation flotation device comprising a flotation tank (1) characterised in that: The inner cavity of the flotation tank (1) is provided with a stirring pool (101), a dissolved gas pool (102), a flotation pool (103), a filter residue pool (104) and a clean water sedimentation pool (105), and the dissolved gas pool (102) is provided with a mixing mechanism (4). The mixing mechanism (4) comprises a mixing cylinder (401) sealingly and fixedly installed on the inner wall of the dissolved gas pool (102), a spiral shaft (404) rotatably installed in the mixing cylinder (401), a scraper (406) coaxially installed at the bottom of the spiral shaft (404), a dissolved gas plate (405) abuttingly installed at the bottom of the scraper (406), the dissolved gas plate (405) being embedded in the inner bottom of the dissolved gas pool (102), and a driving assembly (403) sleeved on the top of the spiral shaft (404), and a mixing motor (402) cooperatively installed on one side of the driving assembly (403).

2. The device according to claim 1, characterized in that: The mixing motor (402) is fixed to the top of the flotation tank (1), and the outer edge of the spiral blade of the spiral shaft (404) is 3-5 mm away from the inner wall of the mixing cylinder (401).

3. The device according to claim 2, characterized in that: An outlet hole (401a) is formed at the top of one side of the outer wall of the mixing cylinder (401), and an inlet hole (401b) is formed at the bottom of the other side of the outer wall of the mixing cylinder (401).

4. The device according to claim 3, characterized in that: A stirring mechanism (2) is arranged in the stirring pool (101), a partition plate is formed at the inner bottom of the stirring pool (101), the top of the partition plate is 25 cm away from the inner top of the flotation tank (1), and a sewage introduction pipe (3) is inserted and connected to one side of the outer portion of the stirring pool (101).

5. A sewage solid separation and flotation device for environmental remediation according to claim 4 wherein: A residue scraping mechanism (5) is rotatably installed on the outer top of the flotation pool (103).

6. The device according to claim 5, wherein: A movable filter residue frame is arranged in the filter residue pool (104), the bottom of the filter residue frame is in communication with the inner portion of the flotation pool (103), and a clean water discharge pipe (7) is inserted to one side of the outer wall of the clean water sedimentation pool (105).

7. An environmental governance sewage solid separation and flotation device according to claim 6, characterized in that: A dissolved gas mechanism (6) is arranged on the outer wall of the flotation tank (1), an output pipe of the dissolved gas mechanism (6) is in communication with the dissolved gas plate (405), and an input pipe of the dissolved gas mechanism (6) is connected to the clean water discharge pipe (7) through a tee joint.

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