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High-efficiency method for recovery treatment of saliferous wastewater under zero emission through residual heat utilization

A technology for the recovery and treatment of salty wastewater, applied in energy wastewater treatment, water/sewage multi-stage treatment, degassed water/sewage treatment, etc. , to achieve the effect of reducing investment and operating costs, reducing operating costs and minimizing volume

Active Publication Date: 2013-02-27
JIANGSU SUNPOWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to address the high cost of currently commonly used brine membrane treatment, concentrators and crystallizers, especially the problem that zero discharge cannot be achieved once in pretreatment or membrane treatment processes. If it is necessary to use an evaporator for secondary treatment, the result will be It is because the evaporator is large-scale, uses more precious metals, and the cost of wastewater treatment is high, so it cannot be popularized and used

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  • High-efficiency method for recovery treatment of saliferous wastewater under zero emission through residual heat utilization

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Effect test

Embodiment 1

[0040] like figure 1 shown.

[0041] A zero-discharge recovery and treatment method for high-efficiency saline wastewater using waste heat. It adopts the zero-discharge technology (ZLD) of chemical pretreatment + membrane process pretreatment + evaporation crystallization + drying, which can treat saline sewage and other wastewater, from high Daily recovery of high quality boiler make-up water and utility water from concentrated saline wastewater and other wastewater. In the end, it will help the factory to achieve green environmental protection and zero emission requirements with less project investment and operating costs.

[0042] The specific processing method is:

[0043] After saline waste water or waste water enters the sewage zero discharge (ZLD) device, it is respectively subjected to acid and alkali stirring, membrane chemical pretreatment (removing 90% of saline waste water), preheating with desalted water, degassing treatment, membrane chemical pretreatment Treatm...

Embodiment 2

[0066] like figure 1 shown.

[0067] A zero-discharge recovery system for saline wastewater, which mainly consists of an agitator 1, a membrane preprocessor 2, a preheat exchange device 3, a degasser 4, a second membrane preprocessor 5, a second heat exchanger 6, The second degasser 7, evaporator 8, separator 9 and crystal salt dryer 10 are composed, such as figure 1 As shown, wherein: the agitator 1 is provided with a dosing port to stir the saline wastewater and the dosing liquid evenly, so that the pH value of the wastewater is between 5 and 6; the membrane processor 2 can make the pH value The salt content of the adjusted saline wastewater is less than 10%; the pre-heat exchange device is used to heat the wastewater filtered by the membrane processor from normal temperature to close to the boiling point; the degasser 4 is used to heat the wastewater heated by the pre-heater 3 degassing to remove the gas generated in the saline wastewater; the second membrane preprocessor...

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Abstract

The invention discloses a high-efficiency method for recovery treatment of saliferous wastewater under zero emission through residual heat utilization. In the method, zero-emission recovery treatment is performed on waste liquid through the steps of chemical pretreatment, membrane process pretreatment, evaporation crystallization and drying, residual heat of factories is fully utilized, saliferous sewage and other wastewater can be treated, and high-quality pure water is recovered from the high-concentration saliferous wastewater and other wastewater. According to the invention, the requirements on high efficiency, environment friendliness and zero emission can be met with lower project investment and fewer operation expenses.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for high-concentration inorganic or organic wastewater, in particular to a zero-discharge recycling treatment method for waste heat utilizing high-efficiency saline wastewater. Background technique [0002] "Zero emission" refers to activities that reduce pollutants and energy emissions to zero indefinitely: that is, to use technologies such as clean production, 3R (Reduce, Reuse, Recycle) and ecological industries to realize the complete recycling of natural resources, so as not to Leave any waste to the atmosphere, water bodies and soil. [0003] At present, various industries, such as electric power, chemical industry, oil refining, pharmaceutical and other industries, will produce some high-concentration wastewater. It is difficult for these wastewater to be 100% treated by traditional wastewater treatment processes to meet the discharge requirements. Many...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F1/44C02F1/20
CPCY02W10/37
Inventor 郭宏新刘丰马明刘世平王红丽李晖王永华
Owner JIANGSU SUNPOWER TECH