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Treatment method of equilibrium adsorption seawater decalcification of plate-and-frame filter press

The technology of a plate and frame filter press and a treatment method is applied in seawater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve the effects of saving production costs, fast filtration, and sufficient response.

Inactive Publication Date: 2013-02-20
TIANJIN BINHUAN CHEM ENG TECH RES INST +1
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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 of equilibrium adsorption seawater decalcification of plate-and-frame filter press

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A treatment method for balanced adsorption of seawater decalcification by a plate and frame filter press, the specific steps are as follows:

[0039] (1) Disperse 130 kg of powdered adsorption material with 260 kg of tap water to make a slurry;

[0040] (2) Add seawater to the slurry adsorbent material in step (1), the adsorbent material is to Ca 2+ The exchange capacity is 2mol-3mol / kg, stirring for 1 to 2 minutes to form a mixed slurry;

[0041] (3) Inject the mixed slurry into the plate-and-frame filter press, the adsorbent material remains in the filter press, and the obtained filtrate is decalcified seawater.

Embodiment 2

[0043] A treatment method for balanced adsorption of seawater decalcification by a plate and frame filter press, the specific steps are as follows:

[0044] (1) Disperse 260 kg of powdered adsorption material with 260 kg of tap water to make a slurry;

[0045] (2) Add seawater to the slurry adsorbent material in step (1), the adsorbent material is to Ca 2+ The exchange capacity is 2mol-3mol / kg, stirring for 10 minutes to form a mixed slurry;

[0046] (3) Inject the mixed slurry into the plate-and-frame filter press, the adsorbent material remains in the filter press, and the obtained filtrate is decalcified seawater.

Embodiment 3

[0048] A treatment method for balanced adsorption of seawater decalcification by a plate and frame filter press, the specific steps are as follows:

[0049] (1) Disperse 180 kg of powdered adsorption material with 260 kg of tap water to make a slurry;

[0050] (2) Add seawater to the slurry adsorbent material in step (1), the adsorbent material is to Ca 2+ The exchange capacity is 2mol-3mol / kg, stirring for 5 minutes to form a mixed slurry;

[0051](3) Inject the mixed slurry into the plate-and-frame filter press, the adsorbent material remains in the filter press, and the obtained filtrate is decalcified seawater.

[0052] Decalcification experiment design and data analysis:

[0053] 1. Data analysis of laboratory test results

[0054] Our previous work showed that ion exchange can be completed in less than a minute under well-stirred and well-mixed equilibrium conditions. In this experiment, we used the method of adding material powder and stirring in seawater for 5 minu...

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Abstract

The invention relates to a treatment method of equilibrium adsorption seawater decalcification of a plate-and-frame filter press. The treatment method comprises the following steps: (1) dispersing an adsorption material by water, and preparing into size; (2) adding the seawater to the size type adsorption material prepared in step (1), and stirring for 1 to 2 minutes so as to obtain the mixed size; and (3) pouring the mixed size into the plate-and-frame filter press, and remaining the adsorption material in the plate-and-frame filter press, so as to obtain the filtrate which is the decalcified seawater. The treatment method of equilibrium adsorption seawater decalcification of the plate-and-frame filter press is simple in process, sufficient in reaction, good in decalcification effect, fast in filtering, and high in production efficiency. By adopting the scheme, the filtering area reaches 600m<2>, and the solution flow is of about 500m<3> per hour. According to the treatment method, the ion exchange capacity is more than 2mol Ca2+ / kg, and the equilibrium adsorption can be realized by 0.3 second, so that the decalcification time of seawater is greatly reduced, and the producing cost of an enterprise can be saved.

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 treatment method for decalcification of seawater by balanced adsorption of a plate-and-frame filter press. 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 sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/42C02F103/08
Inventor 罗坚于雪琴陈明玉蒋凯亮张仂
Owner TIANJIN BINHUAN CHEM ENG TECH RES INST
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