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Method for treating ultrahigh-hardness and ultrahigh-conductivity waste water

A high-conductivity, conductivity technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Low operating cost, low conductivity, and simple operation

Active Publication Date: 2013-07-10
云南江豪科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] 1. The life of the membrane itself is short;
[0005] 2. During the life span of 2-3 years, the treatment effect decays quickly;
[0006] 3. It is easy to cause system blockage;
[0007] 4. High operating cost;
[0008] 5. The average water production rate is less than 75%;
[0009] 6. Operation and maintenance trouble

Method used

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  • Method for treating ultrahigh-hardness and ultrahigh-conductivity waste water

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Embodiment Construction

[0041] Such as figure 1 Shown, the method for processing extra-high hardness extra-high conductivity waste water of the present invention is carried out as follows:

[0042] step one:

[0043] Mix all kinds of wastewater into the adjustment tank for 15-20 minutes and then test the total hardness of the water. When the total hardness is <550 mg / L and the pH value is 7.5-11, it can directly enter step 2 for treatment. If the total hardness is ≥550 mg / L , introduce the water into the sodium carbonate stirring tank, add sodium carbonate to the water and stir for 20-35 minutes until the total hardness of the water is <550 mg / L, (after adding sodium carbonate, a large amount of calcium carbonate will be generated in the water), precipitation 3-6 hours, the supernatant after precipitation enters step 2 for treatment, and the rest of the calcium carbonate-containing sludge is pumped to the sludge dewatering machine for solid-liquid separation, and the separated water returns to the s...

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Abstract

The invention relates to a method for treating ultrahigh-hardness and ultrahigh-conductivity waste water. The method comprises the steps of: leading waste water of all ways to flow in a regulation pool, mixing and detecting the total hardness of the water, adding sodium carbonate in water with high hardness so as to generate indissolvable calcium carbonate with calcium in the water, thus achieving the purpose of softening water; electrifying an adsorption system, removing the majority of cations and anions in the water, purifying outflowing water after being adsorbed by the electrode until water reaches the standard to be directly recycled after flowing in a recycling pool. The method can effectively reduce the hardness and conductivity of the waste water, is simple and convenient for data observation, simple to operate, low in running cost, and high in outflow rate up to 90-96%, and can not cause secondary pollution due to introduction of new matters.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating wastewater with ultra-high hardness and ultra-high conductivity. Background technique [0002] There are many industrial products in the metallurgical industry, and the production processes are divided into series, which discharge a large amount of wastewater, which is an important source of wastewater that pollutes the environment. Its composition is complex and changeable, and the metallurgical wastewater with extremely high hardness and high conductivity is extremely difficult to treat. one. Recycling of wastewater after treatment is an important measure for metallurgical wastewater treatment. [0003] At present, the most widely used method for treating wastewater with high hardness and high conductivity is reverse osmosis membrane technology. However, after using the membrane system to filter for a certain period of time, the filtrati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10
Inventor 孙成余晏祥树罗永光谢益民杨跃红王帆蒋嵩谢小艳
Owner 云南江豪科技有限公司
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