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Treatment method for sea water decalcification through equilibrium adsorption of centrifuge

A treatment method and centrifuge technology, applied in seawater treatment, ion exchange water/sewage treatment, water/sewage multi-stage treatment, etc., to achieve the effects of solving equipment fouling, increasing water production ratio, and shortening time

Inactive Publication Date: 2013-02-27
TIANJIN BINHUAN CHEM ENG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, these two common methods are currently difficult to increase the concentration of concentrated seawater to the level that can directly produce salt in seawater desalination due to the limitation of calcium deposition.

Method used

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  • Treatment method for sea water decalcification through equilibrium adsorption of centrifuge

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Experimental program
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Effect test

Embodiment 1

[0037] 1. Centrifuge seawater decalcification test

[0038] A centrifuge equilibrium adsorption seawater decalcification processing method, the steps are as follows:

[0039] (1) Mix 12 kg of adsorption material with 30 kg of water to make a slurry;

[0040] (2) Let the slurry in step (1) stand for 5 minutes, settle the material, and then pour the upper layer of clear water to obtain the lower layer material-water mixture;

[0041] (3) The mixture is controlled by the pump to feed at a speed of 0.8 m 3 / h enters the centrifuge, centrifuges through the filter cake and flows out from the water outlet, and the obtained filtrate is decalcified seawater.

Embodiment 2

[0043] 1. Centrifuge seawater decalcification test

[0044] A centrifuge equilibrium adsorption seawater decalcification processing method, the steps are as follows:

[0045] (1) Mix 12 kg of adsorption material with 24 kg of water to make a slurry;

[0046] (2) Set aside the slurry in step (1) for 4 minutes to settle the material, then pour the upper layer of clear water to obtain the lower layer material-water mixture;

[0047] (3) The mixture is controlled by a pump to feed at a speed of 0.6 m 3 / h enters the centrifuge, centrifuges through the filter cake and flows out from the water outlet, and the obtained filtrate is decalcified seawater.

Embodiment 3

[0049] 1. Centrifuge seawater decalcification test

[0050] A centrifuge equilibrium adsorption seawater decalcification processing method, the steps are as follows:

[0051] (1) Mix 12 kg of adsorption material with 36 kg of water to make a slurry;

[0052] (2) Set aside the slurry in step (1) for 6 minutes to settle the material, then pour the upper layer of clear water to obtain the lower layer material-water mixture;

[0053] (3) The mixture is controlled by a pump to feed at a speed of 1 m 3 / h enters the centrifuge, centrifuges through the filter cake and flows out from the water outlet, and the obtained filtrate is decalcified seawater.

[0054] Result detection and data analysis:

[0055]After inspecting the seawater in a container with a depth (height) of 1.2 meters, the material was stirred for 5 minutes, and it was found that the material has basically sunk to the bottom, and most (> 85% or even more than 90%) of the seawater can be removed by pouring. Pour off ...

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Abstract

The invention relates to a treatment method for sea water decalcification through equilibrium adsorption of a centrifuge, comprising the specific steps of: (1) mixing an adsorption material with water and preparing slurry; (2) standing the slurry obtained in the step (1) for 4-6 minutes, precipitating the material and pouring out the supernatant water, thereby obtaining the subsurface material which is a water mixture; (3) feeding the water mixture into the centrifuge at the feeding speed of 0.6-1 m3 / h under the control of a pump, and centrifuging to obtain the filtrate, namely the decalcified sea water. The method for sea water decalcification provided by the invention is simple, the ion exchange capacity in the method is greater than 2 mol Ca<2+> / kg, adsorptione equilibrium is established in 0.3 seconds, and therefore, the sea water decalcification time is greatly shortened and the production cost of the enterprise is saved. The adsorption material used in the method is an amorphous-state inorganic ion exchange material; and the adsorption material can be used under the condition of 0-250 DEG C, and as a result, the method is convenient to operate and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of seawater desalination pretreatment, and relates to a seawater desalination method, in particular to a centrifuge equilibrium adsorption seawater decalcification treatment method. Background technique [0002] In the Bohai Rim region, the shortage of fresh water resources has become an important factor restricting economic and social development. The solution, in addition to saving water, must also actively seek open source. Desalination of seawater is considered to be an effective means of open source in the region. In addition, the rapid development of industry in this area has occupied a large number of salt fields, thus restricting the development of salt production and salt chemical industry, which are indispensable to the national economy and people's livelihood. People are actively seeking various ways to simultaneously solve seawater desalination to alleviate water shortage and develop salt chemic...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/42C02F103/08
Inventor 罗坚于雪琴陈明玉蒋凯亮
Owner TIANJIN BINHUAN CHEM ENG TECH RES INST
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