Forward osmosis coupled membrane distillation wastewater treatment apparatus and method thereof

A technology for wastewater treatment and forward osmosis membrane, which is applied in osmosis/dialysis water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc. It can solve problems such as no treatment method given, ecological environment troubles, etc.

Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent does not provide a treatment method for the concentrated water problem of membrane distillation, which brings new troubles to the ecological environment

Method used

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  • Forward osmosis coupled membrane distillation wastewater treatment apparatus and method thereof
  • Forward osmosis coupled membrane distillation wastewater treatment apparatus and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0080] The forward osmosis coupled membrane distillation device involved in this embodiment is a primary device, such as figure 1 shown.

[0081] The main components of the primary processing device and the connection sequence between the components are the same as those in Embodiment 1.

[0082] Using the above-mentioned primary treatment device, the method for treating wastewater by forward osmosis coupling membrane distillation is the same as that in Example 1.

[0083] In the above steps, the forward osmosis raw water 1 is a whey protein solution with a mass concentration of 5%, and the forward osmosis membrane module used is a cellulose acetate plate-and-frame membrane module. Membrane distillation concentrated water with a conductivity of 150,000μs / cm is used as the driving fluid, and forward osmosis raw water and membrane distillation concentrated water flow countercurrently. After 6 hours, the mass concentration of whey protein solution became 10%, and the conductivi...

Embodiment 3

[0085] The forward osmosis coupled membrane distillation device involved in this embodiment is a primary device, such as figure 1 shown.

[0086] The main components of the primary processing device and the connection sequence between the components are the same as those in Embodiment 1.

[0087] Using the above-mentioned primary treatment device, the method for treating wastewater by forward osmosis coupling membrane distillation is the same as that in Example 1.

[0088] In the above steps, the forward osmosis raw water 1 is brackish water with a conductivity of 5000 μs / cm, and the forward osmosis membrane module used is a cellulose acetate plate-and-frame membrane module. Membrane distillation concentrated water with a conductivity of 200,000μs / cm is used as the driving fluid, and forward osmosis raw water and membrane distillation concentrated water flow countercurrently. After 4 hours, the conductivity of brackish water changed to 8600μs / cm, and that of membrane distill...

Embodiment 4

[0090] The device for treating waste water with forward osmosis coupling membrane distillation involved in this embodiment is a secondary device, such as figure 2 shown.

[0091] The secondary treatment device mainly includes: forward osmosis raw water tank 2 and second forward osmosis raw water tank 18: for storing raw water to be forward osmosis; forward osmosis membrane module 4 and second forward osmosis module 20: for separating forward osmosis raw water Forward osmosis raw water pump 3 and the second forward osmosis raw water pump 19: used to pump forward osmosis raw water into the forward osmosis module 4 and the second forward osmosis module 20; forward osmosis drive solution pool 5: used to store as forward osmosis drive solution Forward osmosis drive liquid pump 6: used to pump the membrane distillation concentrated water used as the forward osmosis drive liquid into the forward osmosis membrane module 4 and the second forward osmosis module 20; membrane distillatio...

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Abstract

The invention provides a forward osmosis coupled membrane distillation wastewater treatment apparatus and a method thereof. The apparatus includes a first stage forward osmosis unit or a second stage forward osmosis unit and a membrane distillation unit. The above forward osmosis unit is composed of a forward osmosis raw water pool, a forward osmosis raw water pump, a forward osmosis membrane module, a forward osmosis driving liquid pool and a forward osmosis driving liquid pump; the membrane distillation unit is composed of a membrane distillation thick water raw water pool, a membrane distillation thick water pump, membrane distillation, a membrane distillation water heating pool, a membrane distillation thick water raw water pump, a membrane distillation water feeding pump and a membrane distillation assembly; and the forward osmosis unit is connected with the membrane distillation unit through a pipeline and a valve. The method comprises the following steps: high salinity wastewater treated by the membrane distillation unit is used as a forward osmosis driving liquid, membrane distillation thick water is diluted through continuous concentration of forward osmosis feeding liquid side raw water, the diluted membrane distillation thick water returns to the membrane distillation unit and is continuously treated, and above steps are cycled. The apparatus and the method effectively solve the treatment problem of the membrane distillation thick water, and maximally recover the water resource in the wastewater.

Description

technical field [0001] The invention relates to a device and method for treating wastewater by using membrane separation technology, more specifically, relates to a device and method for treating wastewater with forward osmosis coupling membrane distillation. It belongs to the field of industrial wastewater treatment. Background technique [0002] In recent years, with the widespread application of membrane sewage treatment and reuse devices, the high-salt wastewater produced by petrochemical enterprises, especially the concentrated reverse osmosis water, has become a difficult problem to deal with. Great trouble. [0003] Membrane distillation (MD) has gradually attracted the attention of experts from various countries and conducted extensive research due to its ability to remove higher concentrations of salt and higher desalination rates. It can be regarded as the membrane technology with the highest desalination efficiency so far. Membrane distillation is a hydrophobic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F1/44
Inventor 张新妙栾金义谢梓峰
Owner CHINA PETROLEUM & CHEM CORP
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