Novel precipitation air flotation machine

Abstract

The utility model provides a novel precipitation air flotation machine, which relates to the technical field of environmental protection and sewage treatment, solves the problems that scum treatment is not clean, scum cannot be scraped at one time and sludge cannot be cleared, and comprises a machine body, a contact chamber, a separation chamber and a clear water chamber are arranged in the machine body, and a sludge hopper is arranged at the bottom of the machine body. A slag scraper is arranged at the top of the contact chamber, a scum cleaning device is arranged at the top of the contact chamber, wastewater passes through a dissolved air release device in the contact chamber, and scum with large specific gravity sinks to a sludge hopper and then is discharged; the scum with small specific gravity forms a scum layer at the top of the separation chamber, and the scum is scraped into the scum cleaning device after being treated by the scum scraper, so that scum cleaning is completed. According to the utility model, wastewater with large specific gravity and wastewater with small specific gravity can be treated at the same time; the influence of the dross sinking to the bottom on the effluent quality can be effectively reduced; the baffle plate is arranged to be arc-shaped and keeps the same radian as the scraper of the slag scraper, so that the backflow of the scum can be reduced, and the sinking probability of the scum is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection sewage treatment, in particular to a novel sedimentation flotation machine. Background Art

[0002] Dissolved air flotation is a very commonly used treatment equipment in sewage treatment. Flotation is a sewage treatment equipment that uses small bubbles or tiny bubbles to make impurities in the medium float to the surface. It has a good effect on some fine particles in the water body with a specific gravity close to that of water. It can usually be divided into electrolytic flotation, dissolved air flotation, etc.; the commonly used equipment is dissolved air flotation, and the most common is horizontal flow partially dissolved air pressurized dissolved air flotation.

[0003] In actual use, certain improvements have been made to the horizontal flow pressurized dissolved air flotation. For example, a mud bucket is set at the bottom of the tank to precipitate some heavier sludge that cannot form a scum layer. Although certain improvements have been made to the horizontal flow pressurized dissolved air flotation, there are still certain problems.

[0004] It works well in treating floating oil and suspended solids with smaller specific gravity, but is not ideal in treating suspended solids with larger specific gravity, and scum often settles and falls to the bottom of the pool.

[0005] The flotation scum plates are designed to be flat, which is inconsistent with the arc-shaped walking trajectory of the chain-type scraper plates. As a result, a lot of scum cannot be scraped off in one go during the scraping process, and some scum returns to the flotation tank. In addition, each scraping process causes the scum to become unstable and sink to the bottom of the tank, affecting the scraping effect.

[0006] The scum trough is set at the end of the clean water trough. The scum that is destabilized during the scraping process will pass through the clean water collection pipe, affecting the water discharge effect.

[0007] The flotation contact chamber does not take into account sludge sedimentation and collection measures. In actual operation, when the concentration of suspended solids in the influent is high, sludge often sinks to the bottom of the contact chamber, resulting in sludge sedimentation. Utility Model Content

[0008] To this end, the utility model provides a new type of sedimentation flotation machine, which is used to solve the problems that scum cannot be cleaned, scum cannot be scraped off in one go, and sludge cannot be removed.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a novel sedimentation flotation machine, comprising a machine body, wherein a contact chamber, a separation chamber, and a clean water chamber are provided in the machine body, wherein the separation chamber is provided between the contact chamber and the clean water chamber, a scraper is provided on the top of the machine body, and a sludge hopper is provided at the bottom of the machine body, wherein the receiving port of the sludge hopper is provided at the bottom of the contact chamber and the separation chamber; an air dissolving pump and an air dissolving tank are further provided outside the machine body, wherein the air dissolving pump and the air dissolving tank are connected;

[0010] Among them, the contact chamber is provided with a dissolved air release device, a filler is provided between the separation chamber and the sludge hopper, a water outlet, a clean water collection device and a water level regulating device are provided between the separation chamber and the clean water chamber, the clean water collection device is connected to the water level regulating device, the water level regulating device is provided in the clean water chamber, and a scum cleaning device is provided on the top of the contact chamber

[0011] Preferably, the contact chamber is further provided with a water inlet and a dissolved air release port, and the water inlet, the dissolved air release port and the dissolved air release device are connected.

[0012] Preferably, the scum cleaning device includes a scum trough, a scum separation plate and a scum discharge port, the scum separation plate is arranged on the side of the scum trough close to the scraper and is located at the edge of the scum trough, and the scum discharge port connects the scum trough and the outer port of the machine body.

[0013] Preferably, the scraper includes a frame, a scraper and a transmission device, the scraper and the transmission device are arranged on the frame, the transmission device includes a motor, a reducer, a chain and a gear, the scraper is arranged on the chain, the gear and the chain are meshed and connected, the reducer is connected to the gear, and the motor is connected to the reducer shaft.

[0014] Preferably, the edge of the scum groove is configured to be in an arc shape having the same curvature as the concentric circle of the gear.

[0015] Preferably, the width of the scum trough is smaller than the width of the contact chamber.

[0016] Preferably, the filler is configured as a plurality of inclined tube fillers.

[0017] Preferably, a partition is provided between the separation chamber and the clean water chamber, and the clean water collecting device is provided in the middle of the partition.

[0018] Preferably, the clean water collecting device is provided with a square strip-shaped collecting port.

[0019] Preferably, the sludge hopper is configured as an inverted trapezoid, and a sludge discharge port is provided at the bottom thereof.

[0020] This application adopts the above technical solution, which has at least the following beneficial effects:

[0021] Through the setting of flotation and inclined tube filler, this device can simultaneously treat wastewater with high specific gravity and low specific gravity; the operation mode of the flotation scraper can effectively reduce the impact of scum sinking to the bottom on the effluent water quality; the flotation scum baffle is set to be arc-shaped and maintains the same arc as the scraper of the scraper, which can reduce the backflow of scum, reduce the chance of scum sinking and the efficiency of scraping; the clean water collection system adopts the upward flow water inlet method of rectangular water inlet. On the one hand, the water flow is stable to reduce the scum being carried into the clean water collection system by the water flow, and on the other hand, it can reduce the impact of sinking scum on the clean water collection system.

[0022] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the machine body provided by an embodiment of the utility model;

[0025] Figure 2 This is a schematic structural diagram of a scraper provided by an embodiment of the utility model;

[0026] In the figure: 1. Machine body; 2. Contact chamber; 3. Separation chamber; 4. Clean water chamber; 5. Slag scraper; 6. Sludge hopper; 7. Dissolved air release device; 8. Filler; 9. Water outlet; 10. Clean water collection device; 11. Water level regulating device; 12. Scum cleaning device; 13. Partition; 21. Water inlet; 22. Dissolved air release port; 51. Frame; 52. Scraper; 53. Reducer; 54. Chain; 55. Gear; 61. Sludge discharge port; 121. Scum trough; 122. Scum separation plate; 123. Scum discharge port. DETAILED DESCRIPTION

[0027] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0028] The specific embodiment of the utility model provides a new type of sedimentation flotation machine, combined with the attached Figure 1 and Figure 2 As shown, it mainly includes a body 1, in which a contact chamber 2, a separation chamber 3 and a clean water chamber 4 are provided. The separation chamber 3 is arranged between the contact chamber 2 and the clean water chamber 4. A scraper 5 is provided on the top of the body 1, and a sludge hopper 6 is provided at the bottom of the body 1. The receiving port of the sludge hopper 6 is provided at the bottom of the contact chamber 2 and the separation chamber 3; an air dissolving pump and an air dissolving tank are also provided outside the body 1, and the air dissolving pump and the air dissolving tank are connected;

[0029] Among them, the contact chamber 2 is provided with a dissolved air release device 7, a filler 8 is provided between the separation chamber 3 and the sludge hopper 6, the clean water chamber 4 is provided with a water outlet 9, a clean water collecting device 10 is provided between the separation chamber 3 and the clean water chamber 4, a water level regulating device 11 is provided in the clean water chamber 4, the clean water collecting device 10 and the water level regulating device 11 are connected, and a scum cleaning device 12 is provided on the top of the contact chamber 2.

[0030] Specifically, a dissolved air release device 7 is provided at the lower part of the contact chamber 2. At the same time, the contact chamber 2 is provided with a water inlet 21 and a dissolved air release port 22. The production wastewater enters the contact chamber 2 through the water inlet 21 and passes through the dissolved air release device 7, whereupon the production wastewater is mixed with pressurized dissolved air water. Suspended matter or floating oil with a smaller specific gravity passes through the dissolved air water entering from the dissolved air release port 22 and is mixed with the dissolved air release device 22, then rises in the contact chamber 2 into the top of the separation chamber 3 and forms a scum layer.

[0031] Specifically, the scum cleaning device 12 includes a scum trough 121, a scum separation plate 122, and a scum discharge port 123. The scum separation plate 122 is located on the side of the scum trough 121 near the scraper 5 and at the edge of the scum trough 121. The scum discharge port 123 connects the scum trough 121 to the outer port of the machine body 1. The scum cleaning device 12 is located at the top of the contact chamber 2. The width of the scum trough 121 is smaller than that of the contact chamber 2. When the scum is scraped into the scum trough 121, if any scum sinks, it will enter the contact chamber 3. On the one hand, fine scum can combine with dissolved air and water to float up to form a scum layer, and on the other hand, large scum will fall directly from the contact chamber 2 and slide into the sludge hopper 6. This effectively solves the problem of heavy sludge sinking to the bottom and scum sinking.

[0032] Specifically, the scraper 5 includes a frame 51, a scraper 52 and a transmission device, wherein the transmission device includes a motor, a reducer 53, a chain 54 and a gear 55, wherein the frame 51 is arranged on the top of the body 1, and is used to fix the transmission device and the scraper 52 for normal operation, wherein the motor and the reducer 53 are connected to the rotating shaft, the reducer 53 is connected to the gear 55, the outer ring of the gear 55 is meshed with the chain 54, and the scraper 52 is covered on the outer ring of the chain 54. The motor drives the reducer 53 to move, and the reducer 53 drives the gear 55 to rotate, so that the scraper 52 cleans the scum layer along the moving direction of the chain 54; Figure 2As shown, the scraper 52 moves from the top of the separation chamber 3 toward the top of the contact chamber 2. Under the action of the scraper 5, the scum layer passes through the edge of the scum groove 121, where an arc-shaped scum separation plate 122 with the same curvature as the concentric circle of the gear is provided. When the scraper 5 is running, the running trajectory of the scraper 52 coincides with the arc-shaped scum separation plate 122. In this way, all the scum can be scraped into the scum groove 121 in each round of scraping. On the one hand, it can reduce the backflow of scum to the separation chamber 3. On the other hand, it can also reduce the number of scum separation plates 122 and the operating frequency of the scraper 5, and it can also reduce the scum sinking to the bottom due to water surface fluctuations when the scraper 5 is running.

[0033] Specifically, the filler 8 is configured as a plurality of inclined tube fillers. The inclined tube fillers have a smaller pore size and have a good and efficient separation effect on the sludge containing sediment with a larger specific gravity passing through the bottom of the contact chamber 2 .

[0034] Specifically, the clean water collection device 10 is arranged in the middle of the partition 13 between the separation chamber 3 and the clean water chamber 4. This ensures that the production wastewater can pass through the longest path and stay for the longest time after being treated by flotation or sedimentation, thereby ensuring the separation effect; the clean water collection device 10 uses a lower opening to collect clean water. On the one hand, it allows the suspended matter in the clean water to continue to settle. On the other hand, the external baffle of the clean water collection system is conducive to separating the sinking scum in the separation chamber 3 and dropping it into the inclined tube filling area; the clean water collection device 10 uses a square strip-shaped clean water collection port. The clean water collection port has a large water flow area and a low water flow rate, which can reduce the suspended matter in the water from being carried into the clean water system by the water flow. In addition, the low water flow rate and small head loss of the clean water collection device 10 can reduce the ineffective height of the equipment.

[0035] The working principle of this embodiment is as follows:

[0036] After the production wastewater enters the contact chamber 2 through the water inlet 21 and passes through the dissolved air release device 7, the production wastewater is mixed with the pressurized dissolved air water, and the sludge with a larger specific gravity enters the sludge hopper 6 through the channel at the bottom of the contact chamber 2. The settled sludge is discharged through the sludge discharge port 61. The settled clean water passes through the inclined tube filler 8 and enters the separation chamber 3, then enters the clean water collection device 10 and then passes through the water level regulating device 11 to enter the clean water chamber 4.

[0037] The suspended matter or floating oil with a smaller specific gravity is mixed with the dissolved air water entering from the dissolved air release port 22 and the dissolved air release device 7, and then rises in the contact chamber 2 and enters the top of the separation chamber 3 to form a scum layer. The scraper 52 of the scraper 5 is made as follows. Figure 2As shown, the scum layer rotates counterclockwise, and the scraper 5 is scraped to pass through the scraper trough and the scum separation plate 122 under the action of the scraper. The scum separation plate 122 is set to an arc shape with a curvature radius consistent with the rotation radius of the scraper gear. During the rotation of the scraper 5, the scraper 52 and the scum separation plate 122 maintain good combination throughout the whole process. The scum layer can be scraped into the scum trough 121 at one time, and the scum is discharged through the scum discharge port 123. The clean water separated by flotation enters the separation chamber 3, and then enters the clean water collection device 10. After the water level is adjusted by the water level adjustment device 11, it enters the clean water chamber 4.

[0038] The clean water in the clean water chamber 4 is discharged from the device through the water outlet 9.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new type of sedimentation flotation machine, comprising a machine body (1), characterized in that: A contact chamber (2), a separation chamber (3) and a clean water chamber (4) are provided in the machine body, wherein the separation chamber (3) is provided between the contact chamber (2) and the clean water chamber (4); a scraper (5) is provided on the top of the machine body (1); a sludge hopper (6) is provided at the bottom of the machine body (1); a receiving port of the sludge hopper (6) is provided at the bottom of the contact chamber (2) and the separation chamber (3); an air dissolving pump and an air dissolving tank are also provided outside the machine body (1); the air dissolving pump and the air dissolving tank are connected; The contact chamber (2) is provided with a dissolved air release device (7), a filler (8) is provided between the separation chamber (3) and the sludge hopper (6), the clean water chamber (4) is provided with a water outlet (9), a clean water collecting device (10) is provided between the separation chamber (3) and the clean water chamber (4), the water level regulating device (11) is provided in the clean water chamber (4), the clean water collecting device (10) and the water level regulating device (11) are connected, and a scum cleaning device (12) is provided on the top of the contact chamber (2).

2. A new type of sedimentation flotation machine according to claim 1, characterized in that: The contact chamber (2) is further provided with a water inlet (21) and a dissolved air release port (22), and the water inlet (21), the dissolved air release port (22) and the dissolved air release device (7) are connected.

3. A new type of sedimentation flotation machine according to claim 1, characterized in that: The scum cleaning device (12) comprises a scum trough (121), a scum separation plate (122) and a scum discharge port (123); the scum separation plate (122) is arranged on a side of the scum trough (121) close to the scraper (5) and located at the edge of the scum trough (121); and the scum discharge port (123) connects the scum trough (121) and an outer port of the machine body (1).

4. A new type of sedimentation flotation machine according to claim 3, characterized in that: The scraper (5) comprises a frame (51), a scraper (52) and a transmission device, wherein the scraper (52) and the transmission device are arranged on the frame (51), and the transmission device comprises a motor, a reducer (53), a chain (54) and a gear (55), wherein the scraper (52) is arranged on the chain (54), the gear (55) and the chain (54) are meshed and connected, the reducer (53) and the gear (55) are connected, and the motor and the reducer (53) are connected by a rotating shaft.

5. A new type of sedimentation flotation machine according to claim 4, characterized in that: The scum separation plate (122) is configured to be in an arc shape having the same curvature as the concentric circle of the gear (55).

6. A new type of sedimentation flotation machine according to claim 5, characterized in that: The width of the scum trough (121) is smaller than the width of the contact chamber (2).

7. A new type of sedimentation flotation machine according to claim 1, characterized in that: The packing (8) is configured as a plurality of inclined tube packings.

8. A new type of sedimentation flotation machine according to claim 1, characterized in that: A partition (13) is provided between the separation chamber (3) and the clean water chamber (4), and the clean water collecting device (10) is provided in the middle of the partition (13).

9. A new type of sedimentation flotation machine according to claim 8, characterized in that: The clean water collecting device (10) is provided with a square strip-shaped collecting port.

10. A new type of sedimentation flotation machine according to claim 1, characterized in that: The sludge hopper (6) is configured as an inverted trapezoid, and a sludge discharge port (61) is provided at the bottom thereof.

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