Membrane separating process for purifying high temperature condensated water
A high-temperature condensed water and membrane separation technology, applied in permeation/dialysis water/sewage treatment, etc., can solve the problems of oil particles clogging pores, small absorption capacity, unstable effect, etc., to achieve high recycling rate, good effluent quality, Good effluent quality
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[0024] Example 1 (The process is shown in Figure 1)
[0025] Pass 50L of 85°C steam condensate water A into the membrane treatment system. The water quality of the steam condensate is shown in the column of "Influent Water Quality" in Table 1.
[0026] As shown in Figure 1, the microfiltration or ultrafiltration membrane module 3 uses a 19-channel tubular ceramic microfiltration membrane with a pore size of 200nm, with a membrane area of 1m 2 , The pump 2 provides the pressure conditions required for filtration, the working pressure is 0.25MPa, and the cross-flow filtration method is adopted, that is, the unpermeated liquid circulates between the microfiltration membrane module 3 and the liquid storage tank 1, and the membrane surface flow velocity of the cross-flow 2.5m / s, under this condition, the stable flux of ceramic microfiltration membrane is 0.8m 3 / h, the effluent water quality is shown in the column of "Pretreatment Effluent Water Quality" in Table 1.
[0027] The effl...
Example Embodiment
[0031] Example 2
[0032] Pass 50L of 65°C steam condensate water A into the membrane treatment system. The water quality of the steam condensate water is shown in the column of "Influent Water Quality" in Table 2.
[0033] As shown in Figure 2, the microfiltration or ultrafiltration membrane module 3 uses a polyethersulfone hollow fiber ultrafiltration membrane with a pore size of 20nm and a membrane area of 8m. 2 , The working pressure is 0.03MPa, the ultrafiltration membrane module 3 is placed in the high-temperature condensate material liquid of the liquid storage tank 1, and the dead-end suction negative pressure filtration method is adopted. The suction pump 2 provides the pressure conditions required for filtration. The average flux of the lower ultrafiltration membrane is 1.2m 3 / h, the effluent water quality is shown in the column of "Pretreatment Effluent Water Quality" in Table 2.
[0034] The above-mentioned ultrafiltration membrane effluent enters the intermediate t...
Example Embodiment
[0037] Example 3 (The process is shown in Figure 3)
[0038] Pass 50L of 75°C steam condensate A into the membrane treatment system. The water quality of the steam condensate is shown in the column of "Influent Water Quality" in Table 3.
[0039] As shown in Figure 3, the microfiltration module 3 uses a stainless steel tubular microfiltration membrane with a pore size of 0.8μm, and the membrane area is 0.5m. 2 , The working pressure is 0.12MPa, the dead-end filtration method is adopted, and the pressure condition required for filtration is provided by the pump 2. Under this condition, the average flux of the microfiltration membrane is 1.2m 3 / h, the effluent water quality is shown in Table 3 "Pretreatment Effluent Water Quality".
[0040] The effluent of the microfiltration membrane enters the intermediate liquid tank 4, and is pressurized by the pump 5 to feed the polyethersulfone roll-type nanofiltration membrane module 6, during which a cross-flow filtration cycle is formed. T...
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