Air floating type oil-water separation system

Abstract

The utility model discloses an air floating type oil-water separation system which comprises a stirring tank and an air floating tank, the bottom of the stirring tank is communicated with the air floating tank, at least one side of the air floating tank is provided with an oil collecting tank, and an oil scraping assembly is arranged above the air floating tank. The oil scraping assembly comprises a plurality of oil scraping pieces extending below the liquid level of the air floatation tank and a driving device for driving the oil scraping pieces to move, a plurality of aeration pipes are arranged at the bottom of the air floatation tank in the moving direction of the oil scraping pieces, and the airflow direction of the aeration pipes is upward; the air flow of the plurality of aeration pipes is sequentially increased or decreased along the moving direction of the oil scraping blade; the air flow of the aeration pipe is sequentially increased or decreased in the moving direction of the oil scraping piece, so that the liquid level is inclined at a certain gradient, the separated oil dirt is pushed and concentrated by the bubbles, the oil dirt is conveniently scraped into the oil collecting groove by the oil scraping piece, the oil scraping frequency is reduced, and the oil scraping efficiency is improved. The problem that the oil scraping efficiency of the oil scraping piece is low is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage oil removal technical field, concretely relates to a kind of air floatation oil-water separation systems. BACKGROUND

[0002] Air floatation oil removal is one of the methods of sewage oil removal, which is widely used in petrochemical industry and other fields. In the separation of oil and water, gas pipes are arranged at the bottom to output gas to separate oil and water in sewage, so that the oil floats above the water surface. Then, the oil is scraped into the oil collecting tank by scraper, and the separation of oil and water is completed.

[0003] The air flow of the gas pipe arranged at the bottom of the existing air floatation oil-water separation system is the same, so that the separated oil and water are uniformly dispersed above the water surface. During the movement of the oil scraping piece, the oil moves freely on the water surface, and the oil needs to be scraped into the oil collecting tank by the oil scraping piece multiple times, which reduces the oil scraping efficiency of the oil scraping piece. UTILITY MODEL CONTENT

[0004] The utility model provides an air floatation oil-water separation system to solve the problem of low oil scraping efficiency of the oil scraping piece. The liquid surface is inclined at a certain slope, and the separated oil is concentrated and floats above the water surface, which facilitates the scraping of the oil scraping piece into the oil collecting tank and improves the oil separation efficiency.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] An air floatation oil-water separation system includes a stirring tank and an air floatation tank. A stirrer is arranged in the stirring tank. The bottom of the stirring tank is connected to the air floatation tank. An oil collecting tank is arranged on at least one side of the air floatation tank. An oil scraping assembly is arranged above the air floatation tank. The oil scraping assembly includes a plurality of oil scraping pieces that extend below the liquid surface of the air floatation tank and a driving device that drives the movement of the oil scraping pieces. A plurality of aeration pipes are arranged at the bottom of the air floatation tank along the moving direction of the oil scraping pieces. The airflow direction of the aeration pipes is upward. The air flow of the plurality of aeration pipes increases or decreases along the moving direction of the oil scraping pieces. The liquid surface is inclined at a certain slope. The separated oil is pushed and concentrated by bubbles, which facilitates the scraping of the oil scraping piece into the oil collecting tank, reduces the number of oil scraping, and solves the problem of low oil scraping efficiency of the oil scraping piece.

[0007] As a preferred solution, the driving device is a servo motor. The output end of the servo motor is provided with a chain. The chain is located above the air floatation tank and extends above the oil collecting tank. The plurality of oil scraping pieces are arranged on the chain at intervals.

[0008] As a preferred solution, the oil collecting tank is arranged on the inner side of the air floatation tank.

[0009] As a preferred solution, the number of the oil collecting groove is two, and the two oil collecting grooves are arranged on the opposite inner side walls of the air flotation tank.

[0010] As a preferred solution, each of the aeration pipes is communicated with an external air compression device through a compressed air inlet pipe, and each of the aeration pipes is provided with a control valve for controlling the air flow.

[0011] As a preferred solution, the sewage collecting tank is further provided, the stirring tank is provided with a first sewage outlet, the air flotation tank is provided with a plurality of second sewage outlets, and the oil collecting groove, the first sewage outlet and the second sewage outlets are communicated with the sewage collecting tank through a sewage pipe.

[0012] As a preferred solution, the first sewage outlet is arranged at the bottom of the side wall of the stirring tank, the second sewage outlet is arranged at the bottom of the side wall of the air flotation tank, and the second sewage outlets are arranged at intervals along the moving direction of the oil scraping piece.

[0013] As a preferred solution, the stirring tank is arranged on one side of the air flotation tank, and the stirring tank and the air flotation tank have a common side wall.

[0014] As a preferred solution, the air flotation tank is further provided with a water outlet, and the water outlet is arranged above the second sewage outlet.

[0015] As a preferred solution, a first sewage valve is arranged between the first sewage outlet and the sewage pipe, a second sewage valve is arranged between the first sewage outlet and the sewage pipe, and a third sewage valve is arranged between the oil collecting groove and the sewage pipe.

[0016] Compared with the prior art, the present application has obvious advantages and beneficial effects, specifically, by arranging a plurality of aeration pipes at the bottom of the air flotation tank along the moving direction of the oil scraping piece and making the air flow of the aeration pipes increase or decrease along the moving direction of the oil scraping piece, the liquid surface is inclined at a certain slope, the separated oil stains are pushed and concentrated by the bubbles, the oil scraping piece is convenient to scrape the oil stains into the oil collecting groove, the oil scraping frequency is reduced, the oil scraping efficiency of the oil scraping piece is improved, the oil stain separation efficiency is improved, and the cost of sewage oil removal is reduced.

[0017] In order to more clearly illustrate the structural features, technical means and specific purposes and functions of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments: BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the total structure connection schematic diagram of the embodiment of the present application.

[0019] Explanation of the drawing:

[0020] 10 - stirring tank; 11 - stirrer; 111 - stirring blade; 12 - sewage inlet; 13 - first sewage outlet; 14 - first sewage valve; 15 - sewage pipeline; 16 - common side wall;

[0021] 20 - air floatation tank; 21 - servo motor; 212 - chain; 22 - oil scraping piece; 23 - aeration pipe; 231 - control valve; 24 - compressed air inlet pipe; 25 - second sewage outlet; 251 - second sewage valve; 26 - oil collecting tank; 261 - third sewage valve; 27 - water outlet;

[0022] 30 - sewage collecting tank. DETAILED DESCRIPTION

[0023] In the description of the present application, it should be pointed out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the indicated position or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the application.

[0024] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] As Figure 1The utility model discloses a kind of air floatation oil-water separation systems, including mixing pool 10 and air floatation pool 20, the stirrer 11 is equipped in the mixing pool 10, the bottom of the mixing pool 10 is communicated air floatation pool 20, the two sides of the air floatation pool 20 are equipped with oil collection groove 26, the air floatation pool 20 upper is equipped with oil scraping assembly, the oil scraping assembly includes several oil scraping pieces 22 that extend into the liquid surface of air floatation pool 20 and the driving device that drives oil scraping piece 22 moves, the bottom of the air floatation pool 20 is equipped with several aeration pipes 23 along the moving direction of oil scraping piece 22, the airflow direction of several aeration pipes 23 is set upwards, the gas flow of several the aeration pipe 23 gradually increases or decreases along the moving direction of oil scraping piece 22;By being equipped with several aeration pipes 23 along the moving direction of oil scraping piece 22 at the bottom of air floatation pool 20 and making the gas flow of aeration pipe 23 gradually increases or decreases along the moving direction of oil scraping piece 22, liquid surface is inclined with certain gradient, separated oil dirt is pushed together by bubble, it is convenient for oil scraping piece 22 to scrape into oil collection groove 26, reduce the number of oil scraping, solve the problem of low oil scraping efficiency of oil scraping piece 22.

[0026] In the utility model, the stirrer 11 includes stirring motor, stirring blade 111 and the like, and the stirrer 11 adopts the structure of a common stirrer for those skilled in the art, which will not be described herein.

[0027] The driving device is a servo motor 21, the output end of the servo motor 21 is provided with a chain 212, the chain 212 is located above the air floatation pool 20, and a plurality of the oil scraping pieces 22 are arranged on the chain 212 at intervals, and the oil collection groove 26 is arranged on the inner side of the air floatation pool 20.

[0028] It should be understood that one or more oil collection grooves 26 can be arranged according to requirements, and meanwhile, in order to improve the capacity of the air floatation pool 20, the oil collection groove 26 can also be arranged on the outer side of the air floatation pool 20.

[0029] Each of the aeration pipes 23 is connected to an external air compression device through a compressed air inlet pipe 24, and each aeration pipe 23 is separately provided with a control valve 231 for controlling the gas flow.

[0030] The sewage collecting tank 30 is communicated with the oil collecting groove 26, the first sewage outlet 13 and the second sewage outlets 25 through the sewage pipes 15.

[0031] The first sewage outlet 13 is arranged at the bottom of the side wall of the stirring tank 10, and the second sewage outlets 25 are arranged at the bottom of the side wall of the air flotation tank 20 and are arranged at intervals along the moving direction of the oil scraping pieces 22.

[0032] The air flotation tank 20 is further provided with a water outlet 27 above the second sewage outlets 25.

[0033] The first sewage valve 14 is arranged between the first sewage outlet 13 and the sewage pipe 15, the second sewage valve 251 is arranged between the first sewage outlet 13 and the sewage pipe 15, and the third sewage valve 261 is arranged between the oil collecting groove 26 and the sewage pipe 15.

[0034] In the utility model, the sewage inlet 12 is further arranged on the stirring tank 10.

[0035] The use method of the utility model is as follows: the sewage treated by the dissolved air tank is discharged into the stirring tank 10 through the sewage inlet 12, the agitator 11 is started to drive the stirring blade 111 to stir, the gas and the sewage are mixed more uniformly, and flow to the air flotation tank 20 under the driving of the agitator 11 to separate, the air pipe 23 outputs the gas to separate the moisture and the oil stain, the oil stain is floated to the water surface under the driving of the gas due to the different densities, the impurities sink to the bottom and are discharged from the first sewage outlet 13 and the second sewage outlets 25 to the sewage collecting tank 30; the gas flow of the air pipe 23 increases or decreases along the moving direction of the oil scraping piece 22 in sequence, so that the liquid surface presents a certain slope, the oil stain floating on the moisture is concentrated together, the servo motor 21 drives the chain 212 to make the chain 212 drive the oil scraping piece 22 to scrape the oil stain into the oil collecting groove 26 and discharge into the sewage collecting tank 30

[0036] In summary, the utility model discloses a plurality of aeration pipes 23 are arranged along the moving direction of the oil scraping piece 22 at the bottom of the air floatation tank 20 and make the gas flow of the aeration pipe 23 gradually increase or decrease along the moving direction of the oil scraping piece 22, so that the separated oil dirt is pushed and concentrated by the bubbles, the oil scraping piece 22 is convenient for scraping the oil dirt into the oil collecting groove 26, the oil scraping frequency is reduced, the oil scraping efficiency of the oil scraping piece 22 is improved, the oil dirt separation efficiency is further improved, and the cost of oil removal of sewage is reduced.

[0037] The above is only the preferred embodiment of the utility model, and does not limit the utility model, so any modification, equivalent replacement, improvement and the like made according to the technical actuality of the utility model to the above embodiment still belong to the range of the technical scheme of the utility model.

Claims

1. A gas floatation oil water separation system characterized by, The device comprises a stirring tank and a gas float tank, the stirring tank is provided with a stirrer, the bottom of the stirring tank is communicated with the gas float tank, at least one side of the gas float tank is provided with an oil collecting groove, the gas float tank is provided with an oil scraping assembly above, the oil scraping assembly comprises a plurality of oil scraping pieces extending into the liquid surface of the gas float tank and a driving device for driving the oil scraping pieces to move, the bottom of the gas float tank is provided with a plurality of aeration pipes along the moving direction of the oil scraping pieces, the airflow direction of the aeration pipes is upward, and the air flow of the plurality of aeration pipes increases or decreases along the moving direction of the oil scraping pieces.

2. The gas floatation oil-water separation system of claim 1, wherein, The driving device is a servo motor, the output end of the servo motor is provided with a chain, the chain is located above the gas float tank and extends to the upper side of the oil collecting groove, and a plurality of oil scraping pieces are arranged on the chain in an interval.

3. The gas floatation oil-water separation system of claim 1, wherein, The oil collecting groove is arranged on the inner side of the gas float tank.

4. A gas floatation oil-water separation system according to claim 3, wherein, The number of the oil collecting grooves is two, and the two oil collecting grooves are arranged on the opposite inner side walls of the gas float tank.

5. The gas floatation oil-water separation system of claim 1, wherein, The plurality of aeration pipes are communicated with external air compression equipment through compressed air inlet pipes, and each aeration pipe is separately provided with a control valve for controlling the air flow.

6. The gas floatation oil-water separation system of claim 1, wherein, The device further comprises a sewage collecting tank, the stirring tank is provided with a first sewage outlet, the gas float tank is provided with a plurality of second sewage outlets, and the oil collecting groove, the first sewage outlet and the second sewage outlet are communicated with the sewage collecting tank through a sewage pipe.

7. A gas floatation oil-water separation system according to claim 6, wherein, The first sewage outlet is arranged at the bottom of the side wall of the stirring tank, the second sewage outlet is arranged at the bottom of the side wall of the gas float tank, and the second sewage outlets are arranged in an interval along the moving direction of the oil scraping pieces.

8. A gas floatation oil-water separation system according to claim 7, wherein, The stirring tank is located on one side of the gas float tank, and the stirring tank and the gas float tank have a common side wall.

9. The gas floatation oil-water separation system of claim 6, wherein, The gas float tank is further provided with a water outlet above the second sewage outlet.

10. The gas floatation oil-water separation system of claim 6, wherein, The first sewage outlet and the sewage pipe are provided with a first sewage valve, the first sewage outlet and the sewage pipe are provided with a second sewage valve, and the oil collecting groove and the sewage pipe are provided with a third sewage valve.

Images