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Seawater desalination water taking emergency process for red tide outbreak period

A red tide and process technology, applied in seawater treatment, water/sewage treatment, general water supply conservation, etc., can solve the problems of poor removal of intracellular substances and poor removal of algae, so as to facilitate collection and treatment and reduce chemical cleaning. frequency, turbidity reduction effect

Inactive Publication Date: 2018-11-20
BEIJING BEIKONG HAICHUANG TECH
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Problems solved by technology

However, the removal effect on algae is not very good, and the removal effect on algae metabolites and intracellular substances released by dead algae is poor

Method used

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  • Seawater desalination water taking emergency process for red tide outbreak period

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Embodiment Construction

[0018] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0019] like figure 1 As shown, an emergency process for seawater desalination water intake during the red tide outbreak period. During the red tide outbreak period in the sea area, the following steps are adopted in the water intake section to ensure that the influent water quality does not affect the work of the seawater desalination system:

[0020] Step 1) Dosing sodium hypochlorite: the dosage is 8-15mg / L, and the dosing method is impact dosing;

[0021] Step 2) Dosing powdered activated carbon: the dosage is 10-50mg / L, the activated carbon is 8-20 mesh, and the dosing method is continuous dosing;

[0022] Step 3) Coagulation and sedimentation: The dosage of flocculant polymerized ferric chloride is 7mg / L, mixed by water pump, and the settlement of suspended solids is completed in the inclined plate sedimentation tank. The hydraulic retenti...

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Abstract

The invention relates to a seawater desalination water taking emergency process for a red tide outbreak period. In the red tide outbreak period of a sea area, in a water taking stage, influent water quality is guaranteed not to influence working of a seawater desalination system by adopting the steps as follows: 1, adding sodium hypochlorite to kill algae and plankton in seawater and prevent propagation of shellfish and the like on the wall of a water taking pipe; 2, adding powder activated carbon to absorb algal metabolites and intracellular organic matter released by dead algae; and 3, carrying out coagulation and sedimentation, i.e., adding a flocculating agent polyferric chloride in a sloping plate sedimentation tank to carry out coagulation and sedimentation so as to remove the activated carbon and reduce turbidity of seawater. By the treatment, the organic content and the turbidity of the seawater are greatly reduced, the fouling rate of a reverse osmosis membrane in the subsequent reverse osmosis stage is retarded, the frequency of chemical cleaning of the reverse osmosis membrane is reduced, a great amount of drugs are saved, and stable operation of a seawater desalinationfactory in the red tide outbreak period is ensured.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination, and in particular relates to an emergency process for taking water from seawater desalination during red tide outbreaks. Background technique [0002] Red tides, also known as harmful algal blooms (HABs), are marine ecological disasters caused by the abnormal proliferation of plankton (mainly algae) in certain environments and conditions. From the point of view of environment and systematics, the occurrence of red tide is the result of the accumulation of external adverse environmental factors. Recently, marine red tides in my country's coastal waters have shown a trend of increasing occurrence frequency, expanding disaster scale and aggravating damage. For seawater desalination, due to the increase of seawater turbidity and organic matter content caused by the outbreak of red tides, the original The working efficiency of the seawater desalination pretreatment system is greatly redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/08
CPCC02F1/001C02F1/281C02F1/5236C02F1/76C02F9/00C02F2001/007C02F2103/08Y02A20/131
Inventor 叶萌朱光磊王小水朱坤
Owner BEIJING BEIKONG HAICHUANG TECH
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