CN212051010U - Concentrated retrieval and utilization device of reverse osmosis dense water - Google Patents
Concentrated retrieval and utilization device of reverse osmosis dense water Download PDFInfo
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- CN212051010U CN212051010U CN202020596116.7U CN202020596116U CN212051010U CN 212051010 U CN212051010 U CN 212051010U CN 202020596116 U CN202020596116 U CN 202020596116U CN 212051010 U CN212051010 U CN 212051010U
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Abstract
The utility model discloses a reverse osmosis concentrated water concentration and reuse device, which comprises a biochemical treatment system, a clarification softening tank, an advanced treatment system, a softening bed, a concentrated water reverse osmosis device, a nanofiltration system and a salt extraction tank which are sequentially connected through pipelines; the clarification softening tank is connected with a sludge treatment system; the device also comprises a collecting water tank for respectively collecting the advanced treatment system, the concentrated water reverse osmosis device and the nanofiltration system produced water. The wastewater is treated to the allowable range through the cooperation of all the parts and is recycled, the produced water after the wastewater treatment can be used as circulating water, the rest part of the super-concentrated water is blended with coal, and the recovery rate of the system can reach more than 95%.
Description
Technical Field
The utility model relates to a waste water treatment device, concretely relates to concentrated retrieval and utilization device of reverse osmosis dense water.
Background
A large amount of waste water is generated in the coking and metallurgy industries, a reverse osmosis membrane technology is generally adopted in the current waste water treatment, reverse osmosis is a reverse migration motion of osmosis, and a solvent and a solute in a solution are forced to be separated by the aid of the interception effect of a semipermeable membrane under the pushing of pressure. The technology can generate about 25-30% of concentrated brine in the use process. If the reverse osmosis concentrated water is directly discharged, not only the environment is polluted, but also the waste of water resources is caused. If the part of reverse osmosis concentrated drainage can be recycled, good environmental and economic benefits can be formed.
Disclosure of Invention
The utility model discloses the technical problem that will solve is: aiming at the defects in the prior art, the reverse osmosis concentrated water concentration and reuse device is provided, and the wastewater treatment quality and the subsequent water resource recovery and utilization rate can be improved.
In order to solve the technical problem, the technical scheme of the utility model is that:
a reverse osmosis concentrated water concentration and reuse device comprises a salt extraction tank, a biochemical treatment system, an organic matter clarification and softening tank, an advanced treatment system, a softening bed, a concentrated water reverse osmosis device and a nanofiltration system which are sequentially communicated;
the advanced treatment system comprises a multi-medium filter, an ultrafiltration device, a DEC filter and a reverse osmosis device;
the device also comprises a water collecting tank which is respectively communicated with the reverse osmosis device, the concentrated water reverse osmosis device and the fresh water end of the nanofiltration system; and the concentrated water end of the reverse osmosis device is communicated with the softening bed.
As a preferred technical scheme, a clear water tank and a clear water lift pump are connected with a pipeline between the clarification softening tank and the advanced treatment system; an intermediate water tank and a reverse osmosis concentrated water lift pump are connected with a pipeline between the advanced treatment system and the softening bed; and a pipeline between the concentrated water reverse osmosis device and the nanofiltration system is connected with a concentrated water tank and a concentrated water lift pump.
As a preferred technical scheme, the biochemical treatment system comprises a pretreatment section and a biochemical section.
As a preferable technical scheme, a sludge outlet of the clarification softening tank is connected with a sludge treatment system.
As a preferred technical scheme, the sludge treatment system comprises a sludge concentration tank, wherein the sludge concentration tank is connected with a lifting device, and the lifting device is connected with a filter pressing device.
As a preferable technical solution, the softening bed includes an adsorption layer, and the adsorption layer is a macroporous weak acid sodium type cation resin adsorption layer.
As a preferred technical scheme, backwash water generated by the ultrafiltration device is lifted to the clarification softening tank through a backwash water lifting pump.
Since the technical scheme is used, the beneficial effects of the utility model are that:
the utility model relates to a reverse osmosis concentrated water concentration and reuse device, which comprises a salt extracting tank, a biochemical treatment system, an organic matter clarification softening tank, an advanced treatment system, a softening bed, a concentrated water reverse osmosis device and a nanofiltration system which are sequentially communicated; the advanced treatment system comprises a multi-medium filter, an ultrafiltration device, a filter and a reverse osmosis device; the device also comprises a water collecting tank which is respectively communicated with the reverse osmosis device, the concentrated water reverse osmosis device and the fresh water end of the nanofiltration system; and the concentrated water end of the reverse osmosis device is communicated with the softening bed. The biochemical treatment system is used for carrying out water quality balance adjustment, adjusting the pH value, removing oil and macromolecular particles in water, controlling COD (chemical oxygen demand), ammonia nitrogen and the like in a certain range, and then removing the ammonia nitrogen, the COD and the like in the water through nitrification and denitrification; the clarifying and softening tank is added with sodium hydroxide, a coagulant, soda ash and a flocculating agent for reaction so as to remove most of hardness, alkalinity, turbidity and partial organic matters in water; the advanced treatment system carries out advanced filtration on the wastewater; the softening bed takes out calcium and magnesium ions in the wastewater; the concentrated water reverse osmosis device removes most of salt and organic matters in water; sodium sulfate and sodium chloride are intercepted by the nanofiltration system for recovery, wastewater is treated to be within an allowable range through the cooperation of all parts and is recycled, produced water can be used as circulating water after the wastewater is treated, the rest part of super-concentrated water is blended with coal, and the recovery rate of the system can reach more than 95%.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
wherein: 1. coking wastewater; 2. a biochemical treatment system; 21. biochemical effluent; 3. a clarification softening tank; 31. supernatant fluid; 32. sludge; 33. a clear water tank; 34. a clean water lift pump; 4. a multi-media filter; 5. an ultrafiltration device; 51. backwashing water; 52. a backwash water lift pump; a DEC filter; 7. a reverse osmosis unit; 71. producing water I; 72. reverse osmosis concentrated water; 73. an intermediate water tank; 74. a reverse osmosis concentrated water lift pump; 8. a softening bed; 81. softening the bed effluent; 9, a concentrated water reverse osmosis device; 91. producing water II; 92. the reverse osmosis of the concentrated water is carried out to obtain water; 93. a concentrated water tank; 94. a concentrated water lift pump; 10. a nanofiltration system; 101. producing water III; 102. nanofiltration water outlet; 11. a salt extraction pool; 12. a water collection tank; 13, a mud thickener; 14. a filter pressing device.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
As shown in fig. 1, the reverse osmosis concentrated water concentration and reuse device comprises a salt extraction tank 11, and further comprises a biochemical treatment system 2, an organic matter clarification and softening tank 3, an advanced treatment system, a softening bed 8, a concentrated water reverse osmosis device 9 and a nanofiltration system 10 which are sequentially communicated;
the advanced treatment system comprises a multi-media filter 4, an ultrafiltration device 5, a filter 6 and a reverse osmosis device 7 which are connected in sequence; the backwash water 51 generated by the ultrafiltration device 5 is lifted to the clarification softening tank 6 through a backwash water lifting pump 52, a reverse osmosis membrane is arranged in the reverse osmosis device 7, impurities are left at the concentrated water end through filtration and separation, and the produced water 71 enters the collection water tank 12 through the reverse osmosis membrane; the reverse osmosis concentrated water 72 produced thereby enters an intermediate water tank 73 and is lifted to the softening bed 8 by a reverse osmosis concentrated water lift pump 74.
The fresh water ends of the reverse osmosis device 7, the concentrated water reverse osmosis device 9 and the nanofiltration system 10 are respectively provided with the collecting water tank 12; the concentrated water end of the reverse osmosis device 7 is communicated with the softening bed 8.
The biochemical treatment system 2 comprises a pretreatment section and a biochemical section, biochemical effluent 21 generated by the biochemical treatment system is connected with the clarification softening tank 3 through a pipeline, supernatant 31 generated by the clarification softening tank 3 enters a clear water tank 33 and is lifted 34 to the advanced treatment system by a clear water pump; the sludge 32 generated by the clarification softening tank 3 enters a sludge treatment system, the sludge treatment system comprises a sludge concentration tank 13, the sludge concentration tank 13 is connected with a lifting device, and the lifting device is connected with a filter pressing device 14.
The softening bed 8 comprises an adsorption layer, the adsorption layer is a macroporous weak acid sodium type cation resin adsorption layer, the outlet water 81 of the softening bed generated by the softening bed 8 enters a concentrated water reverse osmosis device 9, and the second 91 of the produced water generated by the concentrated water reverse osmosis device 9 enters a collection water tank 12; the produced concentrated water reverse osmosis effluent 92 enters a concentrated water tank 93 and is lifted to the nanofiltration system 10 through a concentrated water lift pump 94.
The produced water III 101 generated by the nanofiltration system 10 enters a water collection tank 12; the generated nanofiltration effluent 102 enters a salt extraction tank 11.
The utility model discloses a theory of operation does:
taking the coking wastewater 1 as an example, the coking wastewater 1 enters a biochemical treatment system 2, the coking wastewater 1 is subjected to water quality balance adjustment through a pretreatment working section, the pH value is adjusted, oils and macromolecular particles in water are removed, COD (chemical oxygen demand) and ammonia nitrogen are controlled within a certain range, and then the wastewater passes through an anoxic tank, an aerobic tank and a sedimentation tank, and is subjected to nitrification and denitrification to remove ammonia nitrogen, COD and the like in the water to generate biochemical effluent.
The biochemical effluent 21 enters a clarification softening tank 3, most of hardness, alkalinity, turbidity and partial organic matters in the water are removed by adding sodium hydroxide, a coagulant, soda ash and a flocculating agent for reaction, the supernatant 31 generated by the clarification softening tank 3 automatically flows into a clear water tank 32, is lifted by a clear water lifting pump 33 and enters an advanced treatment system for treatment, and the sludge 32 generated by the clarification softening tank 3 enters a sludge treatment system.
The advanced treatment system comprises a multi-media filter 4, an ultrafiltration device 5, a filter 6 and a reverse osmosis device 7, the advanced treatment system mainly generates backwash water 51, produced water I71 and reverse osmosis concentrated water 72, the backwash water 51 is produced water by the ultrafiltration device 5, the backwash water 51 enters a clarification softening tank 3 through a backwash water lifting pump 52, the reverse osmosis concentrated water 72 enters an intermediate water tank 73 and is lifted to a softening bed 8 through a reverse osmosis concentrated water lifting pump 74, a reverse osmosis membrane is arranged in the reverse osmosis device 7, impurities are left at a concentrated water end through filtration and separation, and the produced water I71 penetrates through the reverse osmosis membrane and enters a collection water tank 12.
The reverse osmosis concentrated water 72 removes the residual hardness in the water in the softening bed 8 by means of ion exchange to generate softened bed outlet water 81, and the softened bed outlet water 81 enters the concentrated water reverse osmosis device 9.
The concentrated water reverse osmosis device 9 removes most of salt and organic matters in water, the generated produced water II 91 enters the collection water tank 12, the generated concentrated water reverse osmosis effluent 92 enters the concentrated water tank 93, and the concentrated water reverse osmosis effluent 92 is lifted by the concentrated water lift pump 94 to enter the nanofiltration system 10.
The nanofiltration system 10 intercepts sodium sulfate and sodium chloride for recovery, nanofiltration effluent 102 enters a salt extraction pool 11 for salt extraction, and generated product water III 101 enters a collection water tank 12.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.
Claims (7)
1. The utility model provides a concentrated retrieval and utilization device of reverse osmosis which characterized in that: comprises a salt extraction tank, a biochemical treatment system, an organic matter clarifying and softening tank, an advanced treatment system, a softening bed, a concentrated water reverse osmosis device and a nanofiltration system which are sequentially communicated;
the advanced treatment system comprises a multi-medium filter, an ultrafiltration device, a DEC filter and a reverse osmosis device;
the device also comprises a water collecting tank which is respectively communicated with the reverse osmosis device, the concentrated water reverse osmosis device and the fresh water end of the nanofiltration system; and the concentrated water end of the reverse osmosis device is communicated with the softening bed.
2. The reverse osmosis concentrated water concentrating and recycling device according to claim 1, wherein: a clear water tank and a clear water lift pump are connected with a pipeline between the clarification softening tank and the advanced treatment system; an intermediate water tank and a reverse osmosis concentrated water lift pump are connected with a pipeline between the advanced treatment system and the softening bed; and a pipeline between the concentrated water reverse osmosis device and the nanofiltration system is connected with a concentrated water tank and a concentrated water lift pump.
3. The reverse osmosis concentrated water concentrating and recycling device according to claim 1, wherein: the biochemical treatment system comprises a pretreatment section and a biochemical section.
4. The reverse osmosis concentrated water concentrating and recycling device according to claim 1, wherein: and a sludge outlet of the clarification softening tank is connected with a sludge treatment system.
5. The apparatus of claim 4, wherein the apparatus comprises: the sludge treatment system comprises a sludge concentration tank, wherein the sludge concentration tank is connected with a lifting device, and the lifting device is connected with a filter pressing device.
6. The reverse osmosis concentrated water concentrating and recycling device according to claim 1, wherein: the softening bed comprises an adsorption layer, and the adsorption layer is a macroporous weak acid sodium type cation resin adsorption layer.
7. The reverse osmosis concentrated water concentrating and recycling device according to claim 1, wherein: and the backwash water generated by the ultrafiltration device is lifted to the clarification softening tank by a backwash water lifting pump.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113461204A (en) * | 2021-06-30 | 2021-10-01 | 国核电力规划设计研究院有限公司 | Heat supply network supplementing water treatment device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113461204A (en) * | 2021-06-30 | 2021-10-01 | 国核电力规划设计研究院有限公司 | Heat supply network supplementing water treatment device and method |
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