Method for preparing fresh-water ice by utilizing seawater and brackish water

A technology of brackish water and fresh water ice, applied in ice making, ice making, seawater treatment, etc., can solve inevitable problems and achieve simple and reliable technology

Active Publication Date: 2013-05-08
NINGBO WANJIE WATER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the comparative invention patent with the patent number CN100414219C, the name is "marine ice machine with double adsorption bed chemical adsorption driven by waste heat", which is characterized in that part of the waste heat on the fishi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step (1). Pass seawater or brackish water through a multi-media filter for primary filtration to remove suspended matter with a diameter greater than 0.1 mm in seawater or brackish water to obtain a primary filtrate;

[0017] Step (2). Pass the primary filtrate through a security filter for secondary filtration to remove colloidal particles with a diameter of 1 to 20 microns in the primary filtrate to obtain a secondary filtrate;

[0018] Step (3). The second-stage filtrate is subjected to three-stage filtration through a microfiltration membrane to remove colloids and macromolecular organic matter with a diameter of 0.1 to 0.11 microns in the second-stage filtrate to obtain a third-stage filtrate;

[0019] Step (4). The third-stage filtrate is subjected to four-stage filtration through an ultrafiltration membrane to remove bacteria with a diameter of 0.01 to 0.1 microns in the third-stage filtrate to obtain a fourth-stage filtrate;

[0020] Step (5). The fourth stage f...

Embodiment 2

[0023] Step (1). Pass seawater or brackish water through a multi-media filter for primary filtration to remove suspended matter with a diameter greater than 0.1 mm in seawater or brackish water to obtain a primary filtrate;

[0024] Step (2). Pass the primary filtrate through a security filter for secondary filtration to remove colloidal particles with a diameter of 1 to 20 microns in the primary filtrate to obtain a secondary filtrate;

[0025] Step (3). The second-stage filtrate is subjected to three-stage filtration through a microfiltration membrane to remove colloids and macromolecular organic matter with a diameter of 0.1 to 0.11 microns in the second-stage filtrate to obtain a third-stage filtrate;

[0026] Step (4). The third-stage filtrate is subjected to four-stage filtration through an ultrafiltration membrane to remove bacteria with a diameter of 0.01 to 0.1 microns in the third-stage filtrate to obtain a fourth-stage filtrate;

[0027] Step (5). The fourth stage f...

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PUM

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Abstract

The invention relates to a method for preparing fresh-water ice by utilizing sweater and brackish water. The existing ice marker only has a pure ice making function and does not have a desalting function. The method comprises the following steps of: performing primary filtration, secondary filtration, tertiary filtration and quaternary filtration on the seawater or the brackish water sequentially through a multi-medium filter, a security filter, a micro-filtration membrane and an ultra-filtration membrane, so as to obtain the quaternary filtered fluid; desalting the quaternary filtered fluid by virtue of a separating method of membrane distillation, forward osmosis or electro-osmosis to obtain desalted water with the purity greater than and equal to 99.9%; and obtaining the fresh-water ice through air-cooling or water-cooling condensing of the desalted water. According to the method disclosed by the invention, the fresh-water ice can be automatically prepared by utilizing the seawater or the brackish water; when the inlet water is the seawater or the brackish water with salinity higher than 2%, the fresh-water ice can be prepared through multi-medium filtration, security filtration, micro filtration, ultra-filtration and salt-water separating systems as well as an ice making system, so that the method is especially applicable to the needs of catching and fresh-keeping of ocean fishing vessels.

Description

technical field [0001] The invention belongs to the field of desalination of seawater and brackish water, in particular to a method for preparing freshwater ice from seawater and brackish water. Background technique [0002] At present, with the development of the economy and the improvement of people's living standards, the demand and quality requirements for freshwater ice in all walks of life are getting higher and higher. For example, in the processing of aquatic products, meat, and food, flake ice can keep the products fresh; in supermarkets and aquatic product markets, freshwater ice can prolong their storage period and ensure freshness; during long-distance transportation, such as ocean Fishing, long-distance transportation of vegetables, and fresh water ice can also ensure their freshness. In addition, fresh water ice also has an important application in concrete engineering: when concrete is poured on a large scale in hot seasons, the pouring temperature of concret...

Claims

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Application Information

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IPC IPC(8): C02F9/02F25C1/00C02F1/44C02F103/08
CPCY02A20/131
Inventor 毛波杰刘富
Owner NINGBO WANJIE WATER TECH
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