CN201052990Y - Device for treating water by using oxidation-resisting composite reverse osmosis membrane - Google Patents

Abstract

The utility model discloses a water treatment device adopting an oxidation resistant composite reverse osmosis membrane. The device comprises a water storage tank for need-to-be-purified water, wherein, the water storage tank is connected with a multi-medium filter tank through a pipe which is connected with a water pump and a flocculant dispenser; the multi-medium filter tank is connected with a static mixer through a pipe which is connected with a sodium hypochlorite dispenser and an antisludging agent dispenser; the static mixer is connected with a security filter through a pipe; the security filter is connected with a filtering device with the inside provided with an oxidation resistant composite reverse osmosis membrane through a pipe which is connected with a high pressure pump; moreover, the filtering device is connected with an active carbon filter through a pipe, and the active carbon filter is also connected with an output pipe. The utility model simplifies the equipment of a water treatment system and saves equipment investment, equipment maintenance cost and floor space; moreover, the utility model lowers the cleaning frequency of the reverse osmosis membrane to prolong the service life of a reverse osmosis system, thereby having enormous popularization value.

Description

A treatment device for water treatment using an oxidation-resistant composite reverse osmosis membrane

technical field

The utility model relates to a purification treatment device for water treatment, in particular to a treatment device for water treatment with an oxidation-resistant composite reverse osmosis membrane.

Background technique

The reverse osmosis membrane is a kind of pore size as small as nanometers. Under a certain pressure, water molecules can pass through the surface of the membrane, thereby removing impurities such as inorganic salts, heavy metal ions, organic matter, colloids, bacteria, and viruses in the water. Therefore, reverse osmosis technology occupies an important position in the field of water and liquid separation with its new, efficient and energy-saving separation technology. It is currently widely used in many fields such as seawater desalination, reclaimed water reuse, and micro-polluted surface water treatment.

However, microbial contamination during the use of ordinary reverse osmosis membranes is one of the main problems in the actual use of reverse osmosis. Since the tap water used in my country comes from rivers, lakes or reservoirs, the dissolved oxygen in the water of rivers, lakes or reservoirs ( DO) content is high, phosphorus, nitrogen and other eutrophic substances are abundant, water has high TOC, COD, and BOD values, and high air temperature and water temperature. The reverse osmosis membrane is fouled by microorganisms. At the same time, the adsorption and reproduction of microorganisms on the surface of the reverse osmosis membrane will lead to fouling on the surface of the reverse osmosis. This kind of fouling is often irreversible by cleaning and other means, and leads to the presence of microorganisms in the reverse osmosis product water. Therefore, the current application of reverse osmosis membrane technology in water treatment requires a very good pretreatment of the water source before entering the reverse osmosis system. The existing method is a multi-stage treatment based on disinfection, flocculation, clarification and media filtration. Even after the above methods are adopted, there is still a very high potential pollution to the reverse osmosis membrane. In order to maintain the water production rate of the water treatment system and the requirements after water treatment, the reverse osmosis membrane must be cleaned frequently and regularly. At the same time, most suppliers of reverse osmosis membrane components have strict requirements on the free chlorine in the feed water, requiring the free chlorine content to be less than 0.1mg/L, otherwise the membrane structure of the osmotic membrane will be damaged, so some water treatment systems are designed as To meet this water inlet requirement, it is necessary to use a reducing agent to reduce the residual chlorine in the water, or install an activated carbon filter before the reverse osmosis system to absorb the residual chlorine in the water.

Utility model content

The purpose of the utility model is to provide a treatment device for water treatment using an oxidation-resistant composite reverse osmosis membrane. By applying the anti-oxidation reverse osmosis membrane in water treatment, the treatment steps of the water treatment system are simplified, the treatment device is simpler, the service life of the reverse osmosis system is improved and the water treatment effect is good, and the shortcomings of the existing technology can be overcome .

Embodiment of the utility model:

A treatment device for water treatment with an oxidation-resistant composite reverse osmosis membrane: it includes a water storage tank 1 that needs to be purified, and is characterized in that: the water storage tank 1 is connected to a multimedia filter tank 3 through a pipeline 2, and connected to the pipeline 2 Water pump 4 and flocculant dispenser 5 are arranged; Multi-media filter tank 3 is connected with static mixer 9 through pipeline 6, and sodium hypochlorite dispenser 8 and antiscalant dispenser 18 are connected on pipeline 6, and static mixer 9 passes pipeline and The security filter 7 is connected, and the security filter 7 is connected to the filter device 11 with the oxidation-resistant composite reverse osmosis membrane through the pipeline 10, and the high-pressure pump 12 is connected to the pipeline 10, and the filter device with the oxidation-resistant composite reverse osmosis membrane inside 11 is connected with active carbon filter 14 by pipeline, is also connected with output pipeline 15 on active carbon filter 14

Compared with the prior art, the utility model replaces the existing permeable membrane by the oxidation-resistant composite reverse osmosis membrane used in water treatment, because the oxidation-resistant composite reverse osmosis membrane has a chlorine resistance capacity of 26000ppm/hrs, that is, at the concentration of chlorine It can run stably for 6 years under the condition of 0.5mg/L. By using the strong chlorine resistance of the oxidation-resistant composite reverse osmosis membrane, sodium hypochlorite is added to the water to be purified, and sodium hypochlorite forms hypochlorous acid in the water. Because hypochlorous acid acts on the bacterial protein, it can not only interact with the cell wall, but also Chloric acid molecules are small and uncharged, so it invades cells to oxidize proteins or destroy their phosphate dehydrogenase, causing glucose metabolism disorders and cell death. In addition, hypochlorous acid will disinfect the product water side when it passes through the reverse osmosis membrane, which reduces the irreversible pollution of the reverse osmosis membrane and the harsh chemical cleaning and disinfection requirements, prolongs the service life of the osmosis membrane, and makes the reverse osmosis system more likely to be contaminated by microorganisms Greatly reduce and extend the cleaning cycle. At the same time, the application of the anti-oxidation osmotic membrane not only omits the reducing agent or activated carbon filter process for the adsorption of residual chlorine in the prior art, but also the addition of sodium hypochlorite can replace the existing water treatment process for the adsorption of organic matter, colloid Activated carbon filter with silicone-based substances. This not only simplifies the technological process of the water treatment system, saves equipment investment, equipment maintenance costs and floor space, but also improves the service life of the reverse osmosis system and improves the water treatment effect. Therefore the utility model has good popularization value, has good economic benefit and social benefit.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Embodiment of the present utility model; As shown in Figure 1, the water storage tank 1 of purified water can be a storage tank, a river, a lake or an artesian water pipe, and the water to be purified can be river water, surface water or seawater, and the water storage tank 1 passes through the pipeline 2 is connected with the multimedia filter tank 3, the pipeline can be a water channel or a water pipe, and the medium in the multimedia filter tank 3 can be filter materials such as quartz sand, anthracite or manganese sand, in order to ensure the water energy in the water storage tank 1 It flows into the multimedia filter tank 3, and a water pump 4 is connected to the pipeline 2. At the same time, in order to make the suspended solid particles and metal ions in the purified water generate precipitation, the pipeline 2 is also connected with a flocculant dispenser 5; the water in the water needs to be purified The precipitate formed after the suspended solid particles and metal ions react with the flocculant is filtered by the multimedia filter tank 3 and then connected to the static mixer 9 through the pipeline 6. On the pipeline 6 connecting the multimedia filter tank 3 and the static mixer 9 Connect the sodium hypochlorite dispenser 8 and the antiscalant dispenser 18, mix and dissociate the sodium hypochlorite mixed into the water to be purified by the static mixer 9, the sodium hypochlorite is dissociated into sodium hydroxide and hypochlorous acid in the water to be purified, and the static mixer 9 passes through the pipeline and The security filter 7 is connected, and through the security filter 7, the water to be purified is filtered twice. The security filter 7 is connected to the filter device 11 with the oxidation-resistant composite reverse osmosis membrane through the pipeline 10, because the oxidation-resistant composite reverse osmosis The membrane must overcome the osmotic pressure of the reverse osmosis membrane to achieve the filtering effect, so the high-pressure pump 12 is connected to the pipeline 10, and the oxidation-resistant composite reverse osmosis membrane in the device 11 with the oxidation-resistant composite reverse osmosis membrane will need to purify the inorganic in the water. Salt, heavy metal ions, organic matter, colloids, bacteria and viruses are filtered. The sodium hypochlorite added in the water to be purified simultaneously is fully mixed and dissociated in the static mixer 9 to dissociate the hypochlorous acid, and the hypochlorous acid is used to control and kill the microorganisms attached to the surface of the oxidation-resistant composite reverse osmosis membrane in the filtration process. The content of free chlorine should not exceed the chlorine resistance capacity of 26000ppm/hrs of the oxidation-resistant composite reverse osmosis membrane as the upper limit, and the recommended dosage of chlorine-containing disinfectant promulgated by the Ministry of Health of the People's Republic of China can be referred to. The purified water filtered through the filter 11 with an oxidation-resistant composite reverse osmosis membrane is connected to the activated carbon filter 14 through the pipeline, and the residual chlorine in the purified water is removed through the activated carbon filter 14, so that the purified water finally meets the use requirements. After being filtered by the carbon filter 14, it can be supplied to users through the output pipeline 15. According to different users, the activated carbon filter 14 for removing residual chlorine can be adjusted so that the residual chlorine in the purified water can meet the customer's requirements. Also can be provided with security filter 17 on output pipeline 15, the active carbon powder that leaks in active carbon filter 14 is further filtered.

Claims (1)

1. treatment unit that carries out water treatment with anti-oxide composite reverse osmosis membrane: comprise the water tank (1) that to purify waste water, it is characterized in that: water tank (1) is connected with multi-medium filtering jar (3) by pipeline (2), is connected with water pump (4) and flocculation agent dispenser (5) on pipeline (2); Multi-medium filtering jar (3) is connected with static mixer (9) by pipeline (6), on pipeline (6), be connected with clorox dispenser (8) and Scale inhibitors dispenser (18), static mixer (9) is connected with security personnel's strainers (7) by pipeline, security personnel strainers (7) by pipeline (10) with in have the filtration unit (11) of anti-oxide composite reverse osmosis membrane to be connected, on pipeline (10), be connected with high-pressure pump (12), in have the filtration unit (11) of anti-oxide composite reverse osmosis membrane to be connected with charcoal filter (14) by pipeline, on charcoal filter (14), also be connected with output channel (15).

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