CN211847515U - Reverse osmosis concentrated water recovery processing system - Google Patents
Reverse osmosis concentrated water recovery processing system Download PDFInfo
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- CN211847515U CN211847515U CN201922111658.0U CN201922111658U CN211847515U CN 211847515 U CN211847515 U CN 211847515U CN 201922111658 U CN201922111658 U CN 201922111658U CN 211847515 U CN211847515 U CN 211847515U
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Abstract
The utility model provides a dense water recovery processing system of reverse osmosis, dense water is earlier through the buffer pool storage buffering water volume impact, get into mechanical acceleration clarification tank through the elevator pump, add alkali here, sodium carbonate, PAC, make the calcium ion of aquatic deposit get rid of, and the absorption by the precipitate wraps up in the clamp and acts on the part organic matter of detach, the aquatic acidification adjusts the pH value and flows to the clean water basin after the clarification, it separates out and does not deposit the calcium carbonate of getting rid of to get into two medium filter and fine sand filter removal aquatic in proper order through the clean water pump, get rid of remaining calcium ion through removing calcium ion filter again, it carries out the concentration and separates to get into the electrodialysis device at last, the fresh water that produces goes the retrieval and utilization water tank and carries out cyclic utilization through the retrieval and utilization water pump.
Description
Technical Field
The technical field relates to the field of high-salt industrial wastewater treatment, in particular to a reverse osmosis concentrated water recovery treatment system.
Background
With the pollution of water resources in the world, available water resources tend to be exhausted increasingly, the country requires that the water consumption in industrial production must be reduced, the total water consumption of each ten thousand yuan national production is reduced by 30% in 2017, and is further required to be reduced by 50% in 2018, so that a new round of water-saving technology development must be generated. It is common in industrial processes to treat industrial water using reverse osmosis systems, where the recovery rate of reverse osmosis is typically no more than 75% for better product quality and production safety, and is lower if the raw water is high in salinity or pollution, resulting in at least 25% of the water being discharged as waste water with little waste. The recovery rate of reverse osmosis is directly improved, scaling and pollution blockage of the membrane can be caused, and the operation is unsafe by using a high-pressure pump with higher pressure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a method for the recovery treatment of reverse osmosis concentrated water, which has the characteristics of simple use, safety and stability, and the utilization rate of reverse osmosis concentrated water reaches 75-90 percent.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a reverse osmosis concentrated water recovery treatment system comprises a buffer tank, a lift pump, a mechanical accelerated clarification tank, a clean water pump, a double-medium filter, a fine sand filter, a calcium ion removal filter, an electrodialysis device, a recycling water tank and a recycling water pump which are sequentially communicated; the alkali storage and addition device and the sodium carbonate storage and addition device are respectively arranged above the chemical dosing port of the mechanical accelerated clarification tank; the acid storage and feeding device is arranged above the chemical feeding port of the clean water tank.
The PAC storage and feeding device is arranged above the feeding port of the mechanical accelerated clarification tank.
The alkali storage and addition device and the sodium carbonate storage and addition device are respectively communicated with a chemical dosing port of the mechanical accelerated clarification tank through pipelines; the acid storage and adding device is communicated with the chemical feeding port of the clean water tank through a pipeline.
And the PAC storage and feeding device is communicated with a drug feeding port of the mechanical accelerated clarification tank through a pipeline.
The device also comprises a Roots blower and a backwashing water pump which are used for backwashing the double-medium filter and the fine sand filter; the outlet end of the Roots blower is respectively connected with the air inlets of the double-medium filter and the fine sand filter, and the outlet end of the backwashing water pump is respectively connected with the water inlets of the double-medium filter and the fine sand filter.
The system also comprises a metering pump and a regeneration pump which are used for regenerating the calcium ion removal filter; one end of an inlet of the metering pump is communicated with the acid storage and adding device, and one end of an outlet of the metering pump is communicated with an inlet of the pipeline mixer; one end of the inlet of the regeneration pump is communicated with the recycling water tank, one end of the outlet of the regeneration pump is communicated with the inlet of the pipeline mixer, and one end of the outlet of the pipeline mixer is communicated with the calcium ion removal filter.
The design of the mechanical accelerated clarification tank has the ascending flow velocity of 0.25-0.3 mm/s.
The flow velocity of the cross section of the double-medium filter and the fine sand filter is designed to be 5-7 m/h.
The cross-sectional flow velocity of the calcium ion removal filter is designed to be 20-25 m/h; the filling resin of the calcium ion removal filter adopts calcium ion chelating weak acid resin.
The electrodialysis device adopts an alloy membrane or a homogeneous membrane.
By adopting the treatment system, concentrated water firstly passes through the buffer tank to store buffer water volume impact, enters the mechanical acceleration clarification tank through the lifting pump, alkali, sodium carbonate and PAC are added, calcium ions in the water are precipitated and removed, partial organic matters are removed by the adsorption and wrapping effect of precipitates, acid is added into the clarified water to adjust the pH value, the clarified water automatically flows to a clean water tank, the clarified water sequentially enters the double-medium filter and the fine sand filter through the clean water pump to remove calcium carbonate which is separated out and not precipitated and removed in the water, the residual calcium ions are removed through the calcium ion removal filter, and finally the clarified water enters the electrodialysis device to be concentrated and separated, the produced fresh water is recycled through the recycling water tank, and the concentrated water is discharged.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Wherein 1 is the buffer pool, 2 is the elevator pump, 3 is mechanical acceleration clarification tank, 4 is the clean water basin, 5 is the clean water pump, 6 is the double medium filter, 7 is the fine sand filter, 8 is the decalcification filter, 9 is the electrodialysis device, 10 is the retrieval and utilization water tank, 11 is the retrieval and utilization water pump, 12 is that alkali stores and throws the feeder apparatus, 13 is sodium carbonate charge device, 14 is PAC charge device, 15 is that acid stores and throws the feeder apparatus, 16 is the backwash water pump, 17 is the roots's fan, 18 is the line mixer, 19 is the measuring pump, 20 is the regeneration pump.
Detailed Description
As shown in fig. 1, a reverse osmosis concentrated water recovery treatment system comprises a buffer tank 1, a lift pump 2, a mechanical accelerated clarification tank 3, a clean water tank 4, a clean water pump 5, a double-medium filter 6, a fine sand filter 7, a calcium ion removal filter 8, an electrodialysis device 9, a recycling water tank 10 and a recycling water pump 11 which are sequentially communicated; the alkali storage and addition device 12 and the sodium carbonate storage and addition device 13 are respectively arranged above the chemical feeding port of the mechanical accelerated clarification tank 3 and used for feeding chemicals into the mechanical accelerated clarification tank 3; the acid storage and feeding device is arranged above the feeding opening of the clean water tank and is used for feeding medicines into the clean water tank 4.
The device also comprises a PAC storage and adding device 14 which is arranged above the medicine adding port of the mechanical accelerated clarification tank 3 and is used for adding medicines into the mechanical accelerated clarification tank 3.
The alkali storage and addition device and the sodium carbonate storage and addition device are respectively communicated with a chemical dosing port of the mechanical accelerated clarification tank through pipelines; the acid storage and adding device is communicated with the chemical feeding port of the clean water tank through a pipeline. The PAC storage and feeding device is communicated with a drug feeding port of the mechanical accelerated clarification tank through a pipeline.
The alkali storage and feeding device, the PAC storage and feeding device and the acid storage and feeding device are all devices in the prior art and comprise a storage tank, a metering pump and a medicine unloading pump, wherein the storage tank is used for throwing medicines into the medicine storage and feeding device through the medicine unloading pump, and the medicine storage and feeding device is used for throwing the medicines into corresponding reaction tanks through the metering pump for reaction. The sodium carbonate storage and adding device is independently arranged and is configured into a common configuration of the existing water treatment process technology, and comprises a silo, a dust remover, an unloading device, a dissolving and stirring device and a conveying device.
The device also comprises a Roots blower 17 for backwashing the filter and a backwashing water pump 16; the outlet end of the Roots blower 17 is respectively connected with the air inlets of the double-medium filter 6 and the fine sand filter 7, and the outlet end of the backwashing water pump 16 is respectively connected with the water inlets of the double-medium filter 6 and the fine sand filter 7.
A metering pump 19 and a regeneration pump 20 for regenerating the calcium ion removal filter 8; one end of an inlet of the metering pump 19 is communicated with the acid storage and adding device 15, and one end of an outlet of the metering pump is communicated with an inlet of the pipeline mixer 18; one end of the inlet of the regeneration pump 20 is communicated with the recycling water tank 10, one end of the outlet is communicated with the inlet of the pipeline mixer 18, and one end of the outlet of the pipeline mixer is communicated with the calcium ion removal filter 8.
The mechanical accelerated clarification tank 3 is designed to have an ascending flow velocity of 0.25-0.3 mm/s.
The cross-sectional flow velocity of the double-medium filter 6 and the fine sand filter 7 is designed to be 5-7 m/h.
The cross-sectional flow velocity of the calcium ion removal filter 8 is designed to be 20-25 m/h.
The filling resin of the calcium ion removing filter 8 adopts calcium ion chelating weak acid resin.
The electrodialysis device 9 adopts an alloy membrane or a homogeneous membrane.
The utility model discloses concentrated water recovery system of reverse osmosis is applicable to the concentrated water of reverse osmosis that contains salt content 10000-.
The first-stage reverse osmosis inlet water is not subjected to hardness removal generally, the reverse osmosis system is ensured not to be scaled by adding acid and a scale inhibitor, and inlet water suspended matters and organic pollutants are qualified after pretreatment. Therefore, the reverse osmosis concentrated water contains a large amount of salt, and pollutants influencing the recovery treatment are calcium ions and organic matters generated by adding the scale inhibitor.
The reverse osmosis concentrated water firstly enters the buffer tank 1, the reverse osmosis usually runs for a plurality of sets, and the start-stop time is not uniform, so that the buffer tank is arranged for adjusting the water quantity of the concentrated water generated by the reverse osmosis to be balanced, and the volume of the buffer tank is the designed flow of 12 hours.
The reverse osmosis concentrated water enters a mechanical accelerated clarification tank 3 through a lifting pump 2, alkali is added to adjust the pH value to 9-9.5, sodium carbonate and calcium ions are added to combine to generate calcium carbonate precipitation, the magnesium ions in the water inevitably generate fine magnesium hydroxide precipitates due to the alkaline environment, but the magnesium hydroxide is not easy to precipitate, PAC is added to generate flocculation reaction, the calcium carbonate and the magnesium hydroxide are coagulated into larger particles to precipitate, and in the process, the calcium carbonate and the magnesium hydroxide particles have adsorption action to adsorb organic matters which are generated by a scale inhibitor in the water and are wrapped by the organic matters, so that the organic matters and the precipitates are changed into sludge to be removed. The mechanical acceleration clarification tank 3 is designed to have the ascending flow velocity of 0.25-0.3 mm/s.
And adding acid into the clarified clear water to adjust the pH value to 6.5-7.5, and automatically flowing into a clear water tank 4, wherein the volume of the clear water tank 4 is designed to be the designed flow rate of 4 hours.
Clear water enters the double-medium filter 6 and the fine sand filter 7 in sequence through the clear water pump 4 to remove calcium carbonate which is separated out from the water but not removed by precipitation, and the flow velocity of the designed cross section of the filter is 5-7 m/h. The filling height of the double-medium filter 6 is 1200mm, the upper layer anthracite is 400mm, the grain diameter is 0.8-1.2mm, and the lower layer quartz sand is 800mm, the grain diameter is 0.6-1.2 mm. The filling height of the fine sand filter 7 is 1000mm, wherein the filling height of the upper layer of quartz sand is 700mm, the grain diameter is 0.35-0.6mm, and the filling height of the lower layer of quartz sand is 300mm, and the grain diameter is 0.6-1.2 mm. Anthracite and quartz sand are selected from green source water treatment materials of the company Limited in the Guyi city.
The clean water is passed through a calcium ion removing filter 8 to remove residual calcium ions, the design cross-sectional flow rate of the calcium ion removing filter 8 is 20-25m/h, the resin filling height is 1600-2000mm, weak acid type calcium ion chelating resin is adopted as the resin, and macroporous amino phosphoric acid type calcium ion chelating resin D402-II of Jiangyin Suqing water treatment engineering group Limited company is selected.
And finally, the clean water enters an electrodialysis device 9 for concentration and separation, the produced fresh water is sent to a reuse water tank 10 and recycled through a reuse water pump, and the concentrated water is discharged. The salt content of concentrated water generated by concentration of the electrodialysis device can reach 130000-150000mg/L, the salt content of fresh water can reach 500-1000 mg/L, and the membrane adopts Hangzhou blue alloy membrane SED250 or Japanese ASTOM homogeneous phase membrane AC 50-1200.
Claims (10)
1. The utility model provides a dense water recovery processing system of reverse osmosis which characterized in that: comprises a buffer tank, a lift pump, a mechanical accelerated clarification tank, a clean water pump, a double-medium filter, a fine sand filter, a calcium ion removal filter, an electrodialysis device, a recycling water tank and a recycling water pump which are sequentially communicated; the alkali storage and addition device and the sodium carbonate storage and addition device are respectively arranged above the chemical dosing port of the mechanical accelerated clarification tank; the acid storage and feeding device is arranged above the chemical feeding port of the clean water tank.
2. The reverse osmosis concentrated water recovery processing system of claim 1, wherein: the PAC storage and feeding device is arranged above the feeding port of the mechanical accelerated clarification tank.
3. The reverse osmosis concentrated water recovery processing system of claim 1, wherein: the alkali storage and addition device and the sodium carbonate storage and addition device are respectively communicated with a chemical dosing port of the mechanical accelerated clarification tank through pipelines; the acid storage and adding device is communicated with the chemical feeding port of the clean water tank through a pipeline.
4. The reverse osmosis concentrated water recovery processing system of claim 2, wherein: and the PAC storage and feeding device is communicated with a drug feeding port of the mechanical accelerated clarification tank through a pipeline.
5. The reverse osmosis concentrated water recovery processing system of claim 1, wherein: the device also comprises a Roots blower and a backwashing water pump which are used for backwashing the double-medium filter and the fine sand filter; the outlet end of the Roots blower is respectively connected with the air inlets of the double-medium filter and the fine sand filter, and the outlet end of the backwashing water pump is respectively connected with the water inlets of the double-medium filter and the fine sand filter.
6. The reverse osmosis concentrated water recovery processing system of claim 1, wherein: the system also comprises a metering pump and a regeneration pump which are used for regenerating the calcium ion removal filter; one end of an inlet of the metering pump is communicated with the acid storage and adding device, and one end of an outlet of the metering pump is communicated with an inlet of the pipeline mixer; one end of the inlet of the regeneration pump is communicated with the recycling water tank, one end of the outlet of the regeneration pump is communicated with the inlet of the pipeline mixer, and one end of the outlet of the pipeline mixer is communicated with the calcium ion removal filter.
7. The reverse osmosis concentrated water recovery processing system of claim 1, wherein: the design of the mechanical accelerated clarification tank has the ascending flow velocity of 0.25-0.3 mm/s.
8. The reverse osmosis concentrated water recovery processing system of claim 1, wherein: the flow velocity of the cross section of the double-medium filter and the fine sand filter is designed to be 5-7 m/h.
9. The reverse osmosis concentrated water recovery processing system of claim 1, wherein: the cross-sectional flow velocity of the calcium ion removal filter is designed to be 20-25 m/h; the filling resin of the calcium ion removal filter adopts calcium ion chelating weak acid resin.
10. The reverse osmosis concentrated water recovery processing system of claim 1, wherein: the electrodialysis device adopts an alloy membrane or a homogeneous membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922111658.0U CN211847515U (en) | 2019-11-30 | 2019-11-30 | Reverse osmosis concentrated water recovery processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922111658.0U CN211847515U (en) | 2019-11-30 | 2019-11-30 | Reverse osmosis concentrated water recovery processing system |
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| CN211847515U true CN211847515U (en) | 2020-11-03 |
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| CN201922111658.0U Active CN211847515U (en) | 2019-11-30 | 2019-11-30 | Reverse osmosis concentrated water recovery processing system |
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