A system for treating salty wastewater and a method for using the system to treat salty wastewater
A treatment system and technology for salty wastewater, applied in the field of wastewater treatment, can solve the problems of poor corrosion resistance, low treatment efficiency, and high operating costs, and achieve the effects of high water production efficiency, high treatment efficiency, and good water quality.
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Embodiment 1
[0043] Such as Figure 1A and Figure 1B As shown (not shown in part of the structure diagram), the present embodiment provides a membrane distillation device, the membrane distillation device includes an evaporator, the evaporator has a water inlet 1 and a water outlet 2; a hydrophobic membrane 3, the The hydrophobic film is arranged in the evaporator; the condensation film 4, the condensation film is arranged in the evaporator; the secondary steam booster device 5, the secondary steam booster device is arranged outside the evaporator, And communicate with the hydrophobic film 3 and the condensation film 4 respectively; and the condensation water collection tank 6, the condensation water collection tank 6 is arranged outside the evaporator, and communicates with the condensation film 4.
[0044]Wherein, the water inlet 1 is used to supply waste water to the evaporator, the water outlet 2 is used to discharge the waste water from the evaporator, and the evaporator is used to e...
Embodiment 2
[0048] Such as figure 2 As shown (not shown in part of the structural diagram), this embodiment provides a saline wastewater treatment system, which includes the membrane distillation device described in Embodiment 1. The treatment system also includes a waste water collection device, a pretreatment device, and a filter device located outside the membrane distillation equipment. The waste water collection device, pretreatment device, and filter device are connected in series to the water inlet of the membrane distillation equipment.
[0049] The treatment system also includes a concentrated liquid collection device located outside the membrane distillation equipment, and the concentrated liquid collection device communicates with the water outlet of the membrane distillation equipment.
[0050] The treatment system also includes a self-cleaning device located outside the membrane distillation equipment, the self-cleaning device is a membrane distillation cleaning supporting d...
Embodiment 3
[0053] In this embodiment, the system described in Example 2 is used to treat various saline wastewater from a chemical plant in Shandong (average water quality is COD 2265mg / L, TP 47mg / L, TN 652mg / L, TDS 4500mg / L, SS 1749mg / L , pH 7.56).
[0054] Such as figure 2 As shown, the above-mentioned saline wastewater is pretreated to remove hardness, suspended solids and degassed, and then the temperature is raised to 50°C by the heating system in the factory area, and then directly lifted by the pump into the membrane distillation device, and the influent flow rate is 5m 3 / h, the steam inside the hydrophobic film 3 enters the inside of the condensation film 4 through the secondary steam booster device 5 to be liquefied, and the steam liquefaction heat is transferred to the saline wastewater inside the evaporator to maintain a temperature of 50°C. The steam pressure inside the hydrophobic membrane 3 is 100 mbar, and the steam pressure inside the hydrophobic membrane 3 is 800 mbar...
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Abstract
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