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Lime ultrafiltration combined method for removing groundwater hardness

A groundwater and lime technology, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as turbid water, increased turbidity of effluent, filter penetration, etc. Achieve the effects of simple separation, stable operation and short process flow

Inactive Publication Date: 2014-10-15
PIPE NETWORK MANAGEMENT BRANCH OF BEIJING WATERWORKS GRP CO LTD +2
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Problems solved by technology

In addition, when using a filter to filter, occasionally the filter will be suddenly penetrated (the pressure increases instantaneously, causing the turbidity in the filter material aperture in the filter to be pressed out by the water body, causing the water body to suddenly become turbid). As a result, the turbidity of the effluent increases instantaneously, causing serious consequences

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  • Lime ultrafiltration combined method for removing groundwater hardness
  • Lime ultrafiltration combined method for removing groundwater hardness
  • Lime ultrafiltration combined method for removing groundwater hardness

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Embodiment Construction

[0033]An embodiment of a method for removing groundwater hardness through lime ultrafiltration according to the present invention, the method includes the following steps: lift high-hardness groundwater into the reaction tank through a pump, and feed the reaction tank through a chemical dosing device while entering the reaction tank. Add lime powder (calcium hydroxide) into the pool, and fully stir it, and ensure sufficient reaction time to ensure that the lime powder (calcium hydroxide) chemical reacts fully with groundwater to generate CaCO which is insoluble in water. 3 , Mg(OH) 2 The floc turbid liquid; the floc turbid liquid flows to the ultrafiltration membrane tank, and the floc turbid liquid is filtered through the ultrafiltration membrane in the pool, and the CaCO trapped on the liquid inlet side of the ultrafiltration membrane is rapidly settled. 3 , Mg(OH) 2 And the insoluble compounds of Fe and Si in the original high hardness water body, the settled compounds ent...

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Abstract

The invention relates to a method for removing underground water hardness by combination of lime and ultrafiltration. The method comprises the following steps: pumping high-hardness underground water into a reaction pond through a pump, adding lime powder into the reaction pond through a chemical liquid adding device while the underground water is pumped into the reaction pond, fully mixing to guarantee full chemical reaction of the lime powder and the underground water, and generating a CaCO3 floc turbid solution difficultly soluble in the water; and enabling the floc turbid solution to flow to an ultrafiltration membrane for filtering, quickly depositing CaCO3 intercepted on a liquid inlet side of the ultrafiltration membrane and difficultly soluble compounds of Fe, Si in an original high-hardness water body so as to greatly reduce turbidity of the water, and obtaining safe and good-quality drinking water through a permeating solution of the ultrafiltration membrane. The method has the advantages as follows: an effect of quickly and efficiently removing hardness and turbidity of the underground water is obtained by organic combination of a lime method and an ultrafiltration membrane process, and good-quality qualified domestic drinking water is produced; and the method is high in water production efficiency, stable to implement and small in occupied area, and can greatly reduce investment and operation costs.

Description

technical field [0001] The invention relates to a method for removing hardness in groundwater in the field of water supply by combining a lime method and an ultrafiltration membrane combination process. The lime method can effectively remove the temporary hardness in groundwater, and the ultrafiltration membrane can effectively filter the lime produced by the reaction of hardness in water. The application of the organic combination of the two processes in the field of water treatment will become one of the viable water treatment technologies in the future. Background technique [0002] At present, the commonly used methods to reduce hardness in water include ion exchange, electrodialysis, reverse osmosis and chemical softening. However, ion exchange, electrodialysis and reverse osmosis all have disadvantages such as high cost, high operating cost, and low water production rate. Lime is the most commonly used agent in the agent softening method, which is characterized by sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/44
Inventor 刘永康潘俊杰杨芃张谦刘朝晖曹楠陈杰高亚男吴艳
Owner PIPE NETWORK MANAGEMENT BRANCH OF BEIJING WATERWORKS GRP CO LTD
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