Industrial high salinity wastewater separating and purifying method
A technology of high-salt wastewater and purification method, applied in chemical instruments and methods, water/sewage treatment, heating water/sewage treatment, etc., can solve the problem of restricting the speed of salt separation in industrial high-salt wastewater and nowhere to store industrial high-salt wastewater , low efficiency and other problems, to achieve the effect of improving separation and purification efficiency, accumulation efficiency and efficiency improvement
Active Publication Date: 2018-11-27
山东三岳化工有限公司
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Problems solved by technology
However, sodium sulfate and sodium chloride cannot be removed by conventional membrane methods
[0004] At present, the multi-effect evaporation and crystallization method commonly used in the separation technology of industrial high-salt wastewater can realize the separation of salt in industrial high-salt wastewater until the wastewater is evaporated to dryness. The separation speed of salt makes a large amount of industrial high-salt wastewater waiting for separation and has no place to store, and the coarse salt obtained from separation contains high impurities, which cannot be reused and can only be treated as waste, resulting in waste
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[0030] use Figure 1 to Figure 5 The method for separating and purifying industrial high-salt wastewater according to one embodiment of the present invention is described as follows.
[0031] Such as figure 1 and figure 2 As shown, the specific embodiment of the present invention is a kind of industrial high-salt wastewater separation and purification method, the method comprises the following steps:
[0032] Step 1: Preliminarily evaporate and concentrate the wastewater with high salt content to form wastewater with higher salt content, so that the salt content of the wastewater is between 500 and 500,000 mg / l;
[0033] Step 2: After the waste water is preliminarily evaporated and concentrated in Step 1, the obtained waste water is treated at low temperature to reduce the temperature of the waste water to 1.5-2°C, so that the sodium sulfate in the waste water is precipitated, and the sodium sulfate is separated from the waste water ;
[0034] Step 3: After the sodium sul...
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The invention belongs to the technical field of industrial high salinity wastewater treatment, and particularly relates to an industrial high salinity wastewater separating and purifying method. The method comprises the following steps: carrying out preliminary evaporation and concentration on wastewater with high salt content to form wastewater with higher salt content; carrying out low-temperature treatment on the obtained waste water, reducing the temperature of the wastewater by 1.5-2 DEG C to separate out sodium sulfate in the wastewater, and separating the sodium sulfate from the wastewater; guiding the rest wastewater in an industrial high salinity wastewater separating and purifying device for salt separation and purification, and enabling salt to be gathered on balls; and after the wastewater is separated and purified, retaining and storing the separated and purified salt and discharging the wastewater. The sodium sulfate is separated from the wastewater by preliminary evaporation and concentration and low-temperature treatment on the wastewater; and by the industrial high salinity wastewater separating and purifying device, the salt in the wastewater is automatically separated out, and the separating effect is good, the purifying efficiency is high, and the salt can be effectively separated from the wastewater.
Description
technical field [0001] The invention belongs to the technical field of industrial high-salt wastewater treatment, in particular to a method for separating and purifying industrial high-salt wastewater. Background technique [0002] Industrial high-salt wastewater comes from the membrane concentrate, and the calcium and magnesium ions and a small amount of heavy metal ions in the concentrate are basically removed in the lime soda softening section and ion exchange section in the membrane concentration process. Therefore, the discharged wastewater mainly contains sodium sulfate and sodium chloride salts. Among them, the sodium sulfate content is as high as 7%-13%, and the sodium chloride is 5%-8%; [0003] Sodium sulfate, an inorganic compound, sodium sulfate decahydrate, also known as Glauber's salt, high-purity, fine-grained anhydrous substance called Yuanmingfen; Yuanmingfen, white, odorless, bitter crystal or powder, hygroscopic. Appearance is colorless, transparent, lar...
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Patent Timeline
Login to View More IPC IPC(8): C02F9/10C02F1/02C02F1/30C01D5/00
CPCC01D5/00C02F1/02C02F1/04C02F1/302C02F2001/5218C02F2303/26
Inventor 彭圆
Owner 山东三岳化工有限公司