Unlock instant, AI-driven research and patent intelligence for your innovation.

Membrane seawater desalination pretreatment system

A pretreatment and membrane technology, applied in seawater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of accelerating membrane treatment system fouling, membrane generation of inorganic salt scale, and complex operation to reduce the risk of post-flocculation, improve the quality of effluent water, and simplify the operation

Active Publication Date: 2012-12-26
ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECH CO LTD
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a membrane-based seawater desalination pretreatment system, which mainly solves the poor water quality of seawater desalination pretreatment in the prior art, and long-term operation will speed up the fouling of the membrane treatment system, and the operation is complicated. The treatment dosing system needs to be linked with the water quality, and the flocculant occurs post-flocculation in the membrane treatment system, which leads to the technical problems of inorganic salt scale in the membrane in a short time, affecting the service life, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Membrane seawater desalination pretreatment system
  • Membrane seawater desalination pretreatment system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: This process is applied in the Zhoushan Liuheng Island sea area project. The salinity of the sea area near the plant site is mainly affected by the weather, and the salt content of the sea water is about 27000-31000mg / L. The source of sediment in the sea area near the plant site is mainly from the Yangtze River, and the sediment concentration in winter is greater than that in summer. According to relevant hydrological test data, the average sediment concentration in spring tide in the sea area near the plant site is 0.217kg / m 3 , the measured sediment concentration at ebb tide is 0.554kg / m 3 ~0.079kg / m 3 , the maximum sediment concentration in the tidal cycle generally appears after the tide rises or falls.

[0029] A membrane seawater desalination pretreatment system in this example, such as figure 1 , its processing steps are:

[0030] a. Seawater boosting: the seawater stored in the seawater raw water tank 1 is transported to the grid flocculation ...

Embodiment 2

[0038] Example 2: The salt content of the sea water near the Ningbo Xiangshan factory site is about 28000-32000mg / L, and the average sand concentration of the spring tide in the nearby sea area is 0.242kg / m 3 , the measured sediment concentration at ebb tide is 0.563kg / m 3 ~0.08k2g / m 3 , the maximum sediment concentration in the tidal cycle generally appears after the tide rises or falls.

[0039] A membrane seawater desalination pretreatment system in this example, such as figure 1 , its processing steps are:

[0040] a. Seawater boosting: the seawater stored in the seawater raw water tank 1 is transported to the grid flocculation reaction tank 3 through the seawater booster pump 2;

[0041]b. Dosing for water supply: Static pipeline mixer 4 is installed on the inlet water pipe of the reaction tank, and flocculant and bactericide are added through the dosing metering pump, wherein the flocculant is ferric chloride and the bactericide is sodium hypochlorite;

[0042] c. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of seawater desalination, in particular to a membrane seawater desalination pretreatment system. The invention mainly solves the technical problems that in the prior art, the water quality of effluent subjected to seawater desalination pretreatment is poor, the dirt blockage of a membrane treatment system can be accelerated after a device in the prior art operates for a long time, the operation is complex, a pretreatment dosing system needs to be linked with the water quality and a flocculating agent generates the post-flocculation phenomenon in the membrane treatment system to cause the results that inorganic salt deposit is generated by a membrane in short time, the service life is influenced and the like. A method disclosed by the invention comprises the following steps of: seawater boosting, water supply and medicine addition, flocculation reaction, inclined plate precipitation, tail-end filtration, filter backwashing and sludge discharge. A crossed panel separator reactor is arranged in a mesh flocculation reaction tank.

Description

technical field [0001] The invention relates to the field of seawater desalination, in particular to a membrane-based seawater desalination pretreatment system. Background technique [0002] With the rapid development of the seawater desalination industry, reverse osmosis membrane seawater desalination technology has been widely used in coastal cities in my country due to its advantages of low energy consumption, reliable effluent quality, and fully automated operation. As the core component of seawater desalination, the reverse osmosis system has high requirements on the quality of influent water. The treatment effect of the seawater pretreatment system will play a very critical role in the success or failure of the reverse osmosis membrane seawater desalination system. [0003] At present, conventional seawater pretreatment generally adopts flocculation reaction sedimentation tank process. However, the quality of seawater not only fluctuates greatly with the seasons, but ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/44C02F1/50C02F1/52C02F103/08
CPCY02A20/131
Inventor 赵国萍王润得楼振纲阙勇明汤赫男
Owner ZHEJIANG TIANDI ENVIRONMENTAL PROTECTION TECH CO LTD