CN211712862U - Wastewater treatment system for removing COD in high-salinity wastewater - Google Patents
Wastewater treatment system for removing COD in high-salinity wastewater Download PDFInfo
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- CN211712862U CN211712862U CN202020212507.4U CN202020212507U CN211712862U CN 211712862 U CN211712862 U CN 211712862U CN 202020212507 U CN202020212507 U CN 202020212507U CN 211712862 U CN211712862 U CN 211712862U
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Abstract
The utility model discloses a waste water treatment system of desorption COD in high salt waste water, including equalizing basin (1), characterized by specifically includes equalizing basin (1), pH value equalizing basin (2), first solid-liquid separation equipment (3), evaporation plant (4), second solid-liquid separation equipment (5) that communicate in proper order, still includes mixed pond (6) and takes off COD device (7), evaporation plant (4) with second solid-liquid separation equipment (5) communicate with mixed pond (6) respectively, mixed pond (6) again with take off COD device (7) intercommunication. The system can well solve the problems that concentrated water of high-salinity wastewater after evaporation cannot be treated and can only return to the regulating reservoir, so that COD (chemical oxygen demand) is cyclically accumulated, and the subsequent treatment effect is influenced.
Description
Technical Field
The utility model relates to a high salt waste water treatment field specifically is to the effluent disposal system that COD can't effectively get rid of under the high salt condition.
Background
The high-salinity wastewater refers to wastewater with the total dissolved solids of more than 3.5 percent, at least measures the mass fraction of sodium chloride which is more than 1 percent, and contains inorganic salts of chloride ions, sodium ions, sulfate ions and other components, and a great amount of high-salinity wastewater can be generated in the production process of various industries, such as materials, metallurgy, chemical industry, paper making and the like. The waste water has complex properties, has high salt characteristics, and usually has COD due to the existence of other reducing substances and organic matters, so that the direct discharge causes great harm to the environment, particularly, the environmental protection requirement is increasingly strict at present, and the zero discharge requirement is even made in some places.
To treat this type of wastewater, researchers have developed a number of processes. In principle, the treatment techniques can be broadly divided into three categories, with the goal of COD removal:
(1) the technological burning technology is to atomize the high-salt waste water and spray the atomized water into a high-temperature burning furnace.
(2) Biological desalination, namely, COD is degraded by utilizing the metabolism of microorganisms.
(3) The physical and chemical methods, such as oxidation, adsorption, membrane concentration, evaporation, etc., can be selected by different means or combined processes according to the COD property and the treatment purpose. At present, the common method is to use multi-effect evaporation crystallization or MVR evaporation crystallization for treatment, the generated distilled water is recycled, and the crystallization is carried out to obtain the miscellaneous salt for stockpiling.
The utility model mainly researches the method (3). Aiming at high-salt COD-containing wastewater (salt content meets the conditions) of a certain enterprise, COD is removed as a target, means such as oxidation (adding hydrogen peroxide, ozone, Fenton reagent and the like) and adsorption (adding activated carbon, activated aluminum and the like) are adopted, the removal effect of the COD is very poor, if separation means such as membrane concentration or evaporation are adopted, the COD is enriched in concentrated water, the concentrated water has high concentration and cannot be discharged outside, and the concentrated water can only return to an adjusting tank, so the COD is accumulated continuously in a return process, the efficiency of subsequent separation means is reduced to a great extent, and even the COD is completely ineffective. At present, no research is clearly reported on the method to solve the technical problem.
Disclosure of Invention
The utility model aims at: a targeted treatment scheme is researched aiming at the high-salt COD-containing wastewater in the background, and the problems that the concentrated water of the high-salt wastewater after evaporation cannot be treated and can only return to a regulating tank, so that COD (chemical oxygen demand) is circularly accumulated, and the subsequent treatment effect is influenced can be solved. The utility model provides a with the processing scheme that the COD was handled again to the high salt waste water dense water after "the evaporation condensate water dilutes the evaporation," not only do not increase the waste water total amount, still make salinity and COD obtain effective desorption, can further realize the zero release of this type of waste water even, solved the difficult problem of handling of this type of waste water.
The technical scheme of the utility model is that:
the utility model provides a waste water treatment system of desorption COD in high salt waste water, specifically includes equalizing basin, pH value equalizing basin, first solid-liquid separation equipment, evaporation plant, the second solid-liquid separation equipment that communicate in proper order, still includes the mixing tank and takes off the COD device, evaporation plant with second solid-liquid separation equipment communicates with the mixing tank respectively, the mixing tank again with take off the COD device intercommunication.
The pH value adjusting pool is communicated with the pH value adjusting storage device.
Each sub-component in the processing system is an existing device and can be obtained directly through purchase. The utility model discloses a key lies in novel design and design combination, through the utility model discloses system design's improvement, high salt waste water concentrate after diluting the evaporation with the evaporation comdenstion water removes COD and handles again, reduces waste water salt content, makes COD can further handle through conventional means, adopts the comdenstion water as the dilution water, can guarantee that waste water exhaust's total amount is unchangeable, does not increase the treatment cost of enterprise's waste water when having solved the difficult problem of enterprise.
Drawings
FIG. 1 is a schematic structural diagram of a wastewater treatment system for removing COD from high-salinity wastewater.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1, the system for treating wastewater for removing COD from high-salinity wastewater specifically comprises a regulating reservoir 1, a pH regulating reservoir 2, a first solid-liquid separation device 3, an evaporation device 4, a second solid-liquid separation device 5, a mixing reservoir 6 and a COD removing device 7 which are sequentially communicated, wherein the evaporation device 4 and the second solid-liquid separation device 5 are respectively communicated with the mixing reservoir 6, and the mixing reservoir 6 is communicated with the COD removing device 7. The pH value adjusting pool 2 is communicated with the pH value adjusting storage device 8.
The method of operation of the processing system is as follows:
(1) the wastewater enters a regulating tank 1, the wastewater generated in each relevant process is collected, the water quality is regulated, and the water quantity is buffered;
(2) the wastewater enters a pH adjusting tank 2, and a pH adjusting agent is added to adjust the pH of the wastewater to 3-12; the pH regulator is an existing product and can be one or the combination of sodium hydroxide, sodium carbonate, calcium oxide, calcium hydroxide and calcium carbonate;
(3) the wastewater after pH adjustment enters a first liquid-solid separation device 3 for liquid-solid separation to obtain liquid before evaporation and filter residue;
(4) the obtained liquid before evaporation enters an evaporation device 4 for evaporation treatment to obtain condensed water and a concentrated solution containing crystal salt;
(5) the obtained concentrated solution containing the crystal salt enters a second solid-liquid separation device 5 for liquid-solid separation to obtain concentrated solution and crystal salt;
(6) mixing the obtained condensed water and the obtained concentrated solution in a mixing tank 6, and supplementing 0.2-1.5 times of condensed water according to the water content of the crystallized salt to obtain a salt diluted solution;
(7) and (3) feeding the salt diluted solution into a COD removing device 7, and removing COD in the obtained salt diluted solution by adopting the conventional method to obtain low-COD low-salt solution. The existing method can be one or a combination of oxidation or adsorption.
The above description is a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its concept within the technical scope of the present invention.
Claims (2)
1. The utility model provides a waste water treatment system of desorption COD in high salt waste water, includes equalizing basin (1), characterized by, specifically includes equalizing basin (1), pH value equalizing basin (2), first solid-liquid separation equipment (3), evaporation plant (4), second solid-liquid separation equipment (5) that communicate in proper order, still includes mixing tank (6) and takes off COD device (7), evaporation plant (4) with second solid-liquid separation equipment (5) communicate with mixing tank (6) respectively, mixing tank (6) communicate with taking off COD device (7) again.
2. The wastewater treatment system for removing COD from high-salinity wastewater according to claim 1, characterized in that the pH value adjusting tank (2) is communicated with the pH value adjusting storage device (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020212507.4U CN211712862U (en) | 2020-02-26 | 2020-02-26 | Wastewater treatment system for removing COD in high-salinity wastewater |
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| CN202020212507.4U CN211712862U (en) | 2020-02-26 | 2020-02-26 | Wastewater treatment system for removing COD in high-salinity wastewater |
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| CN211712862U true CN211712862U (en) | 2020-10-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804471A (en) * | 2021-01-27 | 2022-07-29 | 苏州科舵工程技术有限公司 | Utilize effluent disposal system of active carbon |
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2020
- 2020-02-26 CN CN202020212507.4U patent/CN211712862U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804471A (en) * | 2021-01-27 | 2022-07-29 | 苏州科舵工程技术有限公司 | Utilize effluent disposal system of active carbon |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yang Kang Inventor after: Hu Kewei Inventor after: Yao Liwei Inventor after: Xu Yuebing Inventor after: He Jian Inventor before: Yang Kang Inventor before: Hu Kewei Inventor before: Yao Liwei Inventor before: Xu Yuebing Inventor before: He Jian Inventor before: Official brave tide Inventor before: Li Xiwei |
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| CB03 | Change of inventor or designer information |