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Ultrasonic-assisted membrane distilled water treatment system and method

An ultrasonic-assisted membrane and treatment system technology, applied in water/sewage treatment, pressure-condition water treatment, water/sludge/sewage treatment, etc. Affecting the effect of membrane distillation and other problems, to achieve the effect of simple process, slowing down the phenomenon of concentration polarization, controllable processing rate and effect

Pending Publication Date: 2020-06-16
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flux of membrane distillation is low, and the surface of the membrane is easy to crystallize or be wetted after long-term operation, which affects the effect of membrane distillation, etc.

Method used

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  • Ultrasonic-assisted membrane distilled water treatment system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]The waste water in the raw water tank 1 is preheated to 80°C by the heater 2, and pumped into the cavity of the ultrasonic-assisted membrane distillation tank 4 through the water inlet pump 3; the cooling water in the cooling water tank 8 is cooled to 20°C by the cooler 7, and then The water circulation pump 6 is driven into the inside of the membrane module 5; since the outside of the membrane module is wastewater with a higher temperature and the inside is cooling water with a lower temperature, there is a difference in steam pressure on both sides, driving the water on the wastewater side to enter through the membrane in the form of steam. On the cooling water side, due to the temperature drop, it condenses into a liquid on the cooling water side; turn on the ultrasonic generator, adjust the working frequency to 40kHz, and the power density to 0.3W / cm 2 , adopt the intermittent action mode, open for 1 minute every 10 minutes, the permeation flux of the membrane is impr...

Embodiment 2

[0047] like figure 1 As shown, the ultrasonic-assisted membrane distilled water treatment system of this embodiment includes a raw water tank 1, a heater 2, an inlet water pump 3, an ultrasonic-assisted membrane distillation tank 4, a membrane module 5, a cooling water circulation pump 6, a cooler 7 and a cooling water tank 8, The microporous filter membrane in the membrane module 5 adopts a combined membrane module of PVDF membrane and PP membrane.

[0048] The wastewater in the raw water tank 1 is preheated to 40°C by the heater 2, and pumped into the chamber of the ultrasonic-assisted membrane distillation tank 4 through the water inlet pump 3; the cooling water in the cooling water tank 8 is cooled to 5°C by the cooler 7, and then The water circulation pump 6 is driven into the inside of the membrane module 5; since the outside of the membrane module is wastewater with a higher temperature and the inside is cooling water with a lower temperature, there is a difference in s...

Embodiment 3

[0050] like figure 1 As shown, the ultrasonic-assisted membrane distilled water treatment system of this embodiment includes a raw water tank 1, a heater 2, an inlet pump 3, an ultrasonic-assisted membrane distillation tank 4, a membrane module 5, a cooling water circulation pump 6, a cooler 7 and a cooling water tank 8; The membrane module 5 adopts a combined membrane module of hollow fiber filter membrane, plate filter membrane and tubular filter membrane, and the material is PTFE membrane.

[0051] The waste water in the raw water tank 1 is preheated to 100°C by the heater 2, and pumped into the cavity of the ultrasonic-assisted membrane distillation tank 4 through the water inlet pump 3; the cooling water in the cooling water tank 8 is cooled to 20°C by the cooler 7, and then The water circulation pump 6 is driven into the inside of the membrane module 5; since the outside of the membrane module is wastewater with a higher temperature and the inside is cooling water with a...

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Abstract

The invention discloses an ultrasonic-assisted membrane distilled water treatment system and method. The system comprises a raw water tank, a heater, a water feeding pump, an ultrasonic-assisted membrane distillation tank, a membrane assembly, a cooling water circulating pump, a cooler and a cooling water tank, wherein the membrane assembly is arranged in the ultrasonic-assisted membrane distillation tank, and ultrasonic generators are arranged around the inner wall of the ultrasonic-assisted membrane distillation tank; the raw water tank, the heater, the water feeding pump and the ultrasonic-assisted membrane distillation tank are sequentially communicated, and an outlet of the ultrasonic-assisted membrane distillation tank is communicated with the raw water tank to form a circulation loop; the cooling water tank, the cooler, the cooling water circulating pump and the membrane assembly are connected; an outlet of the membrane assembly communicates with the cooling water tank to form acirculating loop. The ultrasonic generators are additionally arranged in the working environment of the membrane assembly, so that the mass transfer effect of the membrane surface is enhanced, the concentration polarization phenomenon is relieved, the permeation flux of the membrane is improved, the surface of the membrane assembly can be cleaned, the pollution of the membrane assembly is relieved, the requirement of wastewater desalination can be fully met, and produced water with relatively high quality is obtained.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an ultrasonic-assisted membrane distilled water treatment system and method. Background technique [0002] With the rapid development of my country's economy, the continuous advancement of urbanization and industrialization, on the one hand, the demand for water is increasing rapidly, and on the other hand, water pollution is becoming more and more serious. In addition, the uneven distribution of water resources in my country has exacerbated the contradiction of water shortage. Therefore, treating sewage and improving the efficiency of water recycling are important measures to solve the shortage of water resources. [0003] Desalination is an important process in water treatment, especially in the current zero discharge process of wastewater, desalination process is widely used. Among them, membrane separation processes such as nanofiltration and reverse osmo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/36C02F1/44
CPCC02F1/36C02F1/447C02F2301/043C02F2301/06Y02A20/131
Inventor 余智勇任志博张畅郜时旺刘练波
Owner HUANENG CLEAN ENERGY RES INST
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