Device for treating oil extraction waste water by coagulation-electrocoagulation-ultrafiltration method and the method
A technology of oil production wastewater and electrocoagulation, which is applied in the direction of flocculation/sedimentation water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., to achieve the effects of small footprint, simple and compact equipment structure, and easy management and control
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Embodiment 1
[0054] Coagulation-electrocoagulation-ultrafiltration treatment of oil production wastewater equipment such as figure 1 As shown, the DC stabilized power supply 1 is MPS-1820L-1 type DC stabilized current power supply, the electrode plate 3 connected to the DC stabilized voltage power supply 1 is made of low carbon steel, and the single surface area of the electrode plate 3 is 10×12cm 2 , convex shape, thickness of 3mm, the electrode plate 3 is vertically suspended in the waste water treatment tank 2 during the experiment, the bottom edge of the electrode plate 3 is 2 cm away from the bottom of the waste water treatment tank 2, and the distance between the two electrodes is 2 cm; the waste water treatment tank 2 is self-made and adjustable The thermoelectric coagulation reaction tank has an effective volume of 4.5L; the agitator is a 7312-I type electric agitator, and the bottom of the stirring paddle 4 of the agitator is 2 cm away from the bottom of the wastewater treatment ...
Embodiment 2
[0060] The coagulation-electrocoagulation-ultrafiltration method of Example 1 is used to treat the oil production wastewater device.
[0061] Take 4L of tap water and tertiary oil recovery wastewater water samples respectively, adjust the liquid temperature in the wastewater treatment tank to 40°C, turn on the vacuum pump, open the valve, and adjust the transmembrane pressure difference of the hollow fiber ultrafiltration membrane module to 0.02, 0.04, 0.06, 0.08, 0.1MPa, measure the ultrafiltration membrane flux, the experimental results are shown in Table 2 and figure 2 As shown, curve a in the figure reflects the relationship between transmembrane pressure difference and clear water membrane flux, and curve b reflects the relationship between transmembrane pressure difference and tertiary oil recovery wastewater membrane flux.
[0062] Table 2 Effect of transmembrane pressure difference on membrane flux
[0063] Transmembrane pressure difference / MPa
Embodiment 3
[0065] The coagulation-electrocoagulation-ultrafiltration method of Example 1 is used to treat the oil production wastewater device.
[0066] Take 4L of wastewater samples, use steel electrodes, the distance between the plates is 2cm, adjust the pH value to 7.00, and control the current density to 12.5A / m 2 , the dosage of coagulant aluminum sulfate is 300mg / L, the temperature of the liquid in the wastewater treatment tank is adjusted to 40°C, the stirring speed is 500r / min, after 30 minutes of power-on reaction, turn on the vacuum pump, open the valve, and adjust the hollow fiber ultrafiltration membrane module The transmembrane pressure difference is 0.08MPa, and the outlet water flow rate is adjusted to 0.01m / s, 0.03m / s, 0.05m / s, 0.08m / s through the valve, and the hydraulic retention time and outlet water COD are measured. Cr , the experimental results are shown in Table 3 and image 3 Shown:
[0067] Table 3 Effect of flow rate on hydraulic retention time
[0068] ...
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