Efficient microbubble air floatation oil and suspended solid removal system and process for salt-containing wastewater of an oil and gas field
A technology for salty wastewater and air flotation oil removal, which is applied in mining wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. and other problems, to achieve the effect of reducing labor intensity, reducing drug consumption and ensuring stability
Inactive Publication Date: 2019-06-07
CHINA PETROLEUM ENG & CONSTR +2
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Problems solved by technology
However, these processes mostly focus on removing oil droplets with a particle size of more than 20 μm, and it is basically difficult to remove oil droplets or suspended solids below 20 μm
At the same time, the contribution of air flotation to CODcr removal in oil and gas field saline wastewater mainly comes from the removal of oil and suspended solids, and the initial oxidation effect is very weak
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[0016] A high-efficiency micro-bubble air flotation degreasing and suspended solids system for saline wastewater in oil and gas fields, such as figure 1 As shown, it includes: regulating water tank 1, lift pump 4, air flotation separation tank 5, sludge tank 8, pH meter 9, dosing tank 10, metering pump 12, air compressor 14, high-efficiency swirl mixer 16, Mud bucket 18, slag scraper 19, etc., wherein:
[0017] The salty waste water from the oil and gas field is discharged into the regulating water tank 1 first, and the regulating water tank 1 is connected to the lifting pump 4 through the pipeline 2, and the lifting pump 4 is connected to the high-efficiency cyclone mixer 16 through the pipeline 3, and the air compressor 14 is connected to the high-efficiency cyclone mixer through the air pipe 15. The flow mixer 16 is connected; the dosing tank 10 is connected with the metering pump 12 through the dosing pipe 11, and the metering pump 12 is connected with the high-efficiency ...
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The invention discloses a high-efficiency microbubble air flotation oil and suspended matter removal system and process for salt-containing wastewater of an oil and gas field. The system comprises a regulating water tank, a lifting pump, a microbubble air floatation separation tank and a sludge pump, which are sequentially connected. An efficient cyclone mixer is arranged between the water outletend of the lift pump and the water inlet end of the microbubble air flotation separation tank. The efficient cyclone mixer is respectively connected with the air compressor and the dosing and meteringdevice. A slag scraper is arranged at the top of the microbubble air flotation separation tank, a sludge hopper is arranged below the slag scraper, and the sludge hopper and the microbubble air flotation separation tank are connected with a sludge pump through pipelines. A pH on-line instrument and a liquid level meter are arranged in the water tank. Compared with the prior art, the system and the process have the positive effects that the investment is saved, the occupied area is small, the effluent quality is stable, the management and the operation are convenient, the automatic control canbe completely realized, and the problem of removing oil drops and suspended solids in various sizes is thoroughly solved.
Description
technical field [0001] The invention relates to oil and gas field saline wastewater treatment process for removing oil and suspended matter, in particular to a high-efficiency micro-bubble air flotation, oil removal and suspended matter removal system and process for oil and gas field saline wastewater treatment in oil and gas fields containing high concentration of oil and suspended matter . Background technique [0002] At present, for the removal of oil and suspended solids in oil and gas field saline wastewater, the main processes are demulsification + flocculation sedimentation and air flotation. In terms of material technology, air flotation is the main method, and there are many types of vortex air flotation, shallow air flotation and dissolved air flotation. However, most of these processes focus on removing oil droplets with a particle size of more than 20 μm, and it is basically difficult to remove oil droplets or suspended solids below 20 μm. At the same time, t...
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IPC IPC(8): C02F9/04C02F103/10
Inventor 张永红于建国郭成华宋兴福汤晓勇何化金艳吴福平张建海连伟周宁肖芳赵琼李宇童富良
Owner CHINA PETROLEUM ENG & CONSTR