A kind of easy-scaling salty wastewater treatment method
A technology of salty wastewater and treatment method, applied in water/sewage treatment, water/sludge/sewage treatment, separation method, etc., can solve problems such as high cost of chemicals and sludge
Active Publication Date: 2021-03-09
ZHEJIANG DOWAY ADVANCED TECH CO LTD
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Problems solved by technology
However, the conventional double-alkali softening pretreatment process needs to add a large amount of chemical agents, which are expensive and produce a large amount of sludge
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[0044] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.
[0045] Such as Figure 1 to Figure 7 As shown, the present invention discloses a method for treating salty wastewater that is prone to scaling, comprising the following steps:
[0046] A. Preliminary clarification and filtration of wastewater to remove suspended particles in wastewater;
[0047] First, neutralize, coagulate and precipitate the wastewater, add calcium hydroxide to the wastewater to adjust the pH value of the wastewater to 9 to 9.5, and add organic sulfur and coagulant to the wastewater, wherein the amount of organic sulfur added is 10 to 9.5 100mg / L, polyferric sulfate chloride (coagulant) 40 to 120mg / L, pass the above waste water into the triple tank for preliminary clarification and then filter, the suspended solids in the filtered waste water are less than 5mg / L, to prevent equipment polluti...
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Abstract
The invention discloses a treatment method for fouling-prone saline wastewater, which comprises the following steps: A. preliminary clarification and filtration of the wastewater to remove suspended particles in the wastewater; B. ion grouping of the wastewater by a first electrodialyzer; C. The produced water in the first compartment and the produced water in the third compartment are independently concentrated for the second time on the waste water; the produced water in the first compartment is sent to the second concentration device to obtain the corresponding first fresh water and first concentrated water; A fresh water is sent to the first compartment, and pure water is added to the first compartment; the water produced in the third compartment is sent to the third concentration device to obtain the third fresh water and the third concentrated water; the third fresh water is sent to the The third compartment is described above, and pure water is added to the third compartment to serve as the water supply for the third compartment; this invention can realize the grouping of ions that are prone to scaling, prevent scaling in the equipment, low operating costs, small volume of concentrated water, and return Use a large amount of fresh water.
Description
technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for fouling-prone saline wastewater. Background technique [0002] With the deteriorating problem of water shortage in our country, the problem of overexploitation of groundwater in northern China is serious. Industrial water is a major user of water resources in my country. my country's long-term plan is to achieve a reuse rate of more than 80% for industrial wastewater, but currently it is generally only about 50%. Therefore, there will be a lot of room for growth in the reuse of industrial wastewater. At the same time, my country's environmental protection policy requires thermal power plants, electroplating, coal chemical industry and other industries to achieve zero discharge of wastewater. [0003] However, the current production cost of reclaimed water for industrial wastewater is too high, the quality of reclaimed water is not good, and the investment a...
Claims
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IPC IPC(8): B01D61/48C02F1/469
CPCC02F1/444C02F1/4602C02F1/4693C02F5/00
Inventor 施小东刘泽宇施秦峰金伟平
Owner ZHEJIANG DOWAY ADVANCED TECH CO LTD