CN212375084U - Reverse osmosis system for ultrapure water manufacturing - Google Patents

Abstract

The utility model provides a reverse osmosis system for ultrapure water manufacturing, it can be arranged in ultrapure water manufacturing process to carry out the desalination and take off boron to the running water and the running cost is low. It includes former pond, former pond is connected with heat exchanger, multi-media filter, decarbonization tower, decarbonization pond, active carbon filter, UV sterilizer, cartridge filter, sea water desalination type reverse osmosis unit in order, sea water desalination type reverse osmosis unit is connected with product pond and dense pond respectively, dense pond with multi-media filter with active carbon filter connects.

Description

Reverse osmosis system for ultrapure water manufacturing

Technical Field

The utility model relates to a water treatment system technical field specifically is a reverse osmosis system for ultrapure water makes.

Background

In the existing ultrapure water manufacturing system, the tap water needs to be desalted and boron removed, different combinations of an ion exchange device and a reverse osmosis membrane device are generally adopted to meet the water inlet requirement of a rear-end treatment system, the current common combination is a cation exchange device, a decarbonization tower, an anion exchange device (2B 3T) and a one-stage reverse osmosis membrane or a two-stage reverse osmosis membrane device, the system is quite complex, the early investment and the operation cost are high, the low boron removal rate of the reverse osmosis membrane of the common pure water series can cause the load of the rear-end treatment system to be high, and the use of the ion exchange device of the 2B3T system can require a large amount of acid and alkali to regenerate, so that a large amount of acid and alkali waste liquid needs to be treated, the high treatment cost is needed, and a large amount of acid and alkali waste can be caused by achieving a better regeneration effect, in addition, impurities and organic matters in the acid-base solution for regeneration also bring more potential risks to the operation of the equipment.

SUMMERY OF THE UTILITY MODEL

To the problem that the system running cost is high that has now to be used for running water desalination and boron removal to handle, the utility model provides a reverse osmosis system for ultrapure water makes, it can be used for the ultrapure water preparation in-process to carry out the desalination and take off boron to the running water and the running cost is low.

The technical scheme is as follows: the utility model provides a reverse osmosis system for ultrapure water makes, its includes former pond, former pond is connected with heat exchanger, many media filter, decarbonization tower, decarbonization pond, active carbon filter, UV sterilizer, cartridge filter, sea water desalination type reverse osmosis unit in order, sea water desalination type reverse osmosis unit is connected with product pond and dense water pond respectively, the dense water pond with many media filter with active carbon filter connects.

Preferably, a decarburization water pump is arranged between the decarburization water tank and the activated carbon filter; a reverse osmosis high-pressure pump is arranged between the cartridge filter and the seawater desalination type reverse osmosis device; the concentrated water tank is connected with the multi-media filter and the activated carbon filter through a backwashing water pump.

Preferably, the heat exchanger is connected with the raw water tank through a raw water pump.

Preferably, a first dosing port is arranged between the raw water tank and the multi-media filter and used for dosing hydrochloric acid, a bactericide and a coagulant.

Preferably, a second dosing port is arranged between the multi-medium filter and the decarbonization tower and is used for dosing hydrochloric acid.

Preferably, a third dosing port is arranged between the activated carbon filter and the UV sterilizer and used for dosing sodium hydroxide.

The utility model discloses the beneficial effect who brings: compare in traditional reverse osmosis system, this application is under the condition that quality of water is the same basically at the intaking, have good desalination, boron removal and TOC get rid of the effect, can alleviate follow-up system's operational load, reverse osmosis system's washing number of times has been reduced, and then reverse osmosis system's cleaning cost is practiced thrift, simultaneously because traditional 2B3T ion exchange device has been reduced, the emission of a large amount of acid-base waste liquid when having avoided traditional ion exchange technology regeneration, the expense of the regenerated acid-base of ion exchange resin has been practiced thrift, acid-base regeneration system's investment cost has been saved, the expense of dangerous waste disposal has also been caused when having avoided waste resin to change.

Drawings

Fig. 1 is a schematic view of the system of the present invention.

Detailed Description

As shown in fig. 1, a reverse osmosis system for ultrapure water production comprises a raw water tank 1, wherein the raw water tank 1 is connected with a raw water pump 2 and a heat exchanger 3, and further comprises a multimedia filter 4, a decarbonization tower 5, a decarbonization water tank 6, a decarbonization water pump 7, an activated carbon filter 8, a UV sterilizer 9, a cartridge filter 10, a reverse osmosis high-pressure pump 11 and a seawater desalination type reverse osmosis device 12 which are sequentially connected with the raw water tank 1, the seawater desalination type reverse osmosis device 12 is respectively connected with a water production tank and a concentrated water tank 14, the water production tank is connected with a deep desalination system 13 to perform subsequent deep desalination treatment and polishing treatment on the produced water to obtain ultrapure water, the concentrated water tank 14 is connected with the multimedia filter 4 and the activated carbon filter 8 through a reverse osmosis water pump 15, the related devices can be directly purchased into finished devices, particularly the seawater desalination type reverse osmosis device 12 is a device adopting a seawater desalination membrane, the seawater desalination membrane can be a seawater desalination membrane SW30HRLE-440i produced by the Dow chemical company. In addition, a dosing port is arranged between the raw water tank 1 and the multi-media filter 4 and is used for dosing: hydrochloric acid for pH adjustment, biocides such as sodium hypochlorite for sterilization, coagulants such as PAC; a dosing port is arranged between the multi-medium filter 4 and the decarbonization tower 5 and is used for dosing hydrochloric acid; a dosing port is arranged between the activated carbon filter 8 and the UV sterilizer 9 and is used for adding sodium hydroxide.

The process method for treating raw water by adopting the system comprises the following steps: raw water (the conductivity is 250-350 mu S/cm, TOC 2-2.5 mg/L) enters a raw water tank 1, the water in the raw water tank 1 enters a heat exchanger through a water pump, the water temperature is adjusted to 21-25 ℃, then the water passes through a multi-media filter 4 (the adopted filter material can be anthracite, quartz sand and gravel), the pH is adjusted to 6.5-6.8 by adding hydrochloric acid before entering the multi-media filter 4, then sodium hypochlorite and PAC are simultaneously added, the adding amount of the sodium hypochlorite and the PAC is controlled to be 5ppm, the sodium hypochlorite is added to sterilize tap water, the PAC is added to flocculate suspended matters in the water into larger floaters so as to effectively intercept the multi-media filter 4, and the turbidity of filtered water passing through the multi-media filter 4 is less than 0.01 NTU. Adding hydrochloric acid into water passing through a multi-media filter 4 to adjust pH to 3-4, and then feeding into a decarbonization tower 5, H⁺With HCO₃ ^-Combined to CO₂And CO is passed through a decarbonizing column 5₂And (5) removing.

The water produced by the decarbonization tower 5 enters a decarbonization water tank 6 and is conveyed to an active carbon filter 8 through a water pump, the filler of the active carbon filter 8 is mainly active carbon and is mainly used for removing organic substances and residual chlorine in the water so as to protect a rear RO (reverse osmosis) membrane from oxidation and organic pollution, and the residual chlorine in the effluent of the active carbon filter is less than 0.1 mg/L. The pH value of the produced water of the activated carbon filter 8 is adjusted to 8.5-9.5 by adding sodium hydroxide, the desalination rate and the TOC (total organic carbon) removal rate of a subsequent reverse osmosis system are improved to a certain extent, then the UV sterilizer 9 sterilizes by adopting ultraviolet rays with the wavelength of 254nm, and the sterilization can effectively prevent the RO membrane from being polluted and blocked by bacteria before entering the reverse osmosis device.

The water from the UV sterilizer 9 passes through a 5 mu m filter diameter security filter 10, enters a first-stage seawater desalination type reverse osmosis device 12 through the pressurization of an RO high-pressure pump, the water inlet pressure of the reverse osmosis system is adjusted to be more than or equal to 2.0MPa by the reverse osmosis high-pressure pump, the TDS of the inlet water is 150-250 mg/L, the TOC of the inlet water is 1.5-3 mg/L, the reverse osmosis device adopts a seawater desalination reverse osmosis membrane element with high desalination rate and low energy consumption to replace the traditional 2B3T + first-stage reverse osmosis system or two-stage reverse osmosis system, compared with a common reverse osmosis membrane, the seawater desalination reverse osmosis membrane (seawater desalination membrane) has the characteristics of high desalination rate, corrosion resistance, high pressure resistance, pollution resistance and the like, the water inlet pressure is higher than that of the common reverse osmosis membrane, the water inlet pressure is more than 2.0MPa, the removal rate of TDS (total dissolved solids) can exceed 99.2 percent, can be under the condition of higher salinity intake and higher pressure of intaking, realize sustainable higher desalination and boron removal rate, also have the clearance of the TOC of higher play water simultaneously, reverse osmosis membrane system's antipollution also promotes greatly simultaneously, has reduced reverse osmosis system's washing number of times. Under the condition of reducing a whole set of 2B3T ion exchange devices or reverse osmosis systems, the same water yield and water quality of produced water can be still achieved, the reverse osmosis operation cost can be effectively reduced by 30%, the discharge of regeneration wastewater of the ion exchange devices is also reduced, and the investment and operation cost of the regeneration system are reduced. The recovery rate of the reverse osmosis system is about 80 percent, the TDS of the effluent is 0.8-1.5 mg/L, and the TOC is 30-80 mug/L. And the reverse osmosis produced water enters a water producing tank, the concentrated water enters a backwashing water tank, and the concentrated water can be used for backwashing the front-end activated carbon filter and the multi-media filter.

The utility model provides an ultrapure water manufacturing system adopts "preliminary treatment + sea water desalination reverse osmosis", and it is less than 2 mu S/cm that the play water quality of water can reach the conductivity, and TDS is 0.8-1.5 mg/L, and TOC is 30-80 mu g/L, and the process flow is more succinct, can stop the use of regeneration acid and alkali before the reverse osmosis system completely, reduces the emission of a large amount of regeneration waste liquids.

Compared with the traditional cation exchange device, the decarbonization acid tower and the anion exchange device (2B 3T) + the first-stage reverse osmosis membrane or the two-stage reverse osmosis membrane device, the system adopts the pretreatment system and the first-stage seawater desalination type reverse osmosis device, and the process route is simplified. And a first-stage reverse osmosis system composed of the seawater desalination reverse osmosis membrane elements with high desalination rate and low energy consumption is selected to replace a traditional 2B3T + first-stage reverse osmosis system or a two-stage reverse osmosis system, compared with a common reverse osmosis membrane, the seawater desalination reverse osmosis membrane has the characteristics of high desalination rate, corrosion resistance, high pressure resistance, pollution resistance and the like, and has better effects of desalination, boron removal and TOC removal under the condition that the quality of inlet water is basically the same, the running load of a subsequent system can be greatly reduced, the cleaning frequency of the reverse osmosis system is reduced, the cleaning cost of the reverse osmosis system is saved, the ultrapure water treatment process is greatly simplified, and the floor area of equipment is reduced. Meanwhile, the traditional 2B3T ion exchange device is reduced, the discharge of a large amount of acid-base waste liquid in the regeneration of the traditional ion exchange process is avoided, the cost of all acid-base regenerated by ion exchange resin is saved, the investment cost of all acid-base regenerated acid-base systems is saved, and the cost of dangerous waste disposal caused by the replacement of waste resin is also avoided.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. A reverse osmosis system for ultrapure water production comprising a raw water tank, characterized in that: the raw water pool is sequentially connected with a heat exchanger, a multi-media filter, a decarbonization tower, a decarbonization water pool, an activated carbon filter, a UV sterilizer, a cartridge filter and a seawater desalination type reverse osmosis device, the seawater desalination type reverse osmosis device is respectively connected with a water production pool and a concentrated water pool, and the concentrated water pool is connected with the multi-media filter and the activated carbon filter.

2. A reverse osmosis system for ultrapure water manufacture according to claim 1 wherein: a decarburization water pump is arranged between the decarburization water tank and the activated carbon filter; a reverse osmosis high-pressure pump is arranged between the cartridge filter and the seawater desalination type reverse osmosis device; the concentrated water tank is connected with the multi-media filter and the activated carbon filter through a backwashing water pump.

3. A reverse osmosis system for ultrapure water manufacture according to claim 1 wherein: the heat exchanger is connected with the raw water tank through a raw water pump.

4. A reverse osmosis system for ultrapure water production according to claim 1 or 2 wherein: and a first dosing port is arranged between the raw water tank and the multi-media filter and is used for dosing hydrochloric acid, a bactericide and a coagulant.

5. A reverse osmosis system for ultrapure water production according to claim 1 or 2 wherein: and a second dosing port is arranged between the multi-medium filter and the decarburization tower and is used for dosing hydrochloric acid.

6. A reverse osmosis system for ultrapure water production according to claim 1 or 2 wherein: and a third dosing port is arranged between the activated carbon filter and the UV sterilizer and is used for dosing sodium hydroxide.

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