KR100221225B1 - Apparatus for brine conversion - Google Patents

Abstract

The present invention relates to a seawater capable of filtering water containing a high concentration salt such as seawater and coastal ground water with high-quality treated water to make it into water and potable water, and a water and water treatment apparatus having a high concentration of salt, Or coastal groundwater is taken and stored in the raw water storage tank 1 and is sequentially introduced into the first and second filters 3 and 4 through the transfer pump 2 and is passed therethrough to remove odorous substances and odors, A pre-treatment step of precisely filtering through a fine filter (5); The prefiltered filtered water is sequentially introduced into the reverse osmosis separator (7) (13), which is composed of 1-6 reverse osmosis membranes through the raw water transfer pump (6) and arranged in two stages in series. The primary reverse osmosis separator The concentrated water that has not passed through the reverse osmosis membrane of the first reverse osmosis membrane 7 is drained and the concentrated water that has not passed through the second reverse osmosis separator 13 is returned to the raw water storage tank 1 and further passes through the reverse osmosis separator 13, The removed permeated water is stored in the washing tub 8 and is used to clean the surface of the reverse osmosis membrane of the reverse osmosis separators 7 and 13 by the washing pump 17 and at the same time, Two-step; The treated water stored in the treated water storage tank 9 is introduced into the quartz filter 10 by the feed pump 11 to replenish the mineral components and the treated water supplemented with mineral components is circulated to the treated water storage tank 9 And a post-treatment step in which water is supplied as drinking water or water as water via the water supply pump (12).

Description

Water and potable water containing salt water and high concentration of salt

FIG. 1 is a layout diagram schematically showing a seawater according to the present invention and a water-containing and water-harvesting apparatus containing a high concentration of saline.

DESCRIPTION OF THE REFERENCE NUMERALS

1: raw water reservoir 2: feed pump

3: primary filter 4: secondary filter

5: precision filter 6: raw water transfer pump

7,13: Reverse osmosis separator 8: Washing tank

9: treated water storage tank 10: elvan filter

11: Feed pump 12: Feed pump

14: UV sterilizer 15: Process water quality meter

16: Disinfecting agent supply tank 17: Cleaning pump

[TECHNICAL FIELD]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to water and a water-containing apparatus for water containing salt water and high concentration of salt, and more particularly, to a water- And water for drinking water and water containing water having a high concentration of salt.

[0003]

As a result of the rapid development of the industry, the use of industrial water has been greatly increased. In addition, the use of daily living water has been increasing due to the improvement of dietary life, and the pollution of the dam due to global drought due to recent environmental pollution Of course, not only is the supply of drinking water threatened, but also water supply in industry is becoming a serious problem.

In developed countries, seawater has been desalinated for a long time and is being used for drinking water or industrial water. As a countermeasure to solve the water shortage that is getting worse and worse in Korea at the end of the year, the sea surface is fully desalinated And the methods of making them come to be actively promoted.

On the other hand, as a method of desalinating seawater containing high concentration salt, a crystallization method such as a multi-stage flash method, a multi-effusion method, a vapor compression method, a permeation vaporization method such as a permeation method, a freezing method, a gas hydrate method, A membrane method such as an electrodialysis method, a solvent extraction method, and an ion exchange resin method in which phase change does not occur and a reverse ion exchange resin method are used. In recent years, a reverse osmosis method having a small electricity requirement and easy maintenance is widely used have.

[Object of the invention]

Disclosure of the Invention The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method and apparatus for filtering water containing high salt content such as seawater and coastal groundwater by using reverse osmosis The present invention has been made to solve the above problems.

SUMMARY OF THE INVENTION [

In order to accomplish the above object, the present invention relates to a seawater, a high-concentration saline-containing water, and a water-containing crematoric tooth which are stored in a raw water reservoir capable of automatically controlling the water level by taking seawater or coastal groundwater, The raw water from the raw water storage tank is sequentially introduced into the primary filter, which is a rapid sand filter and the secondary filter, which is an activated carbon filter, through a transfer pump, and the floating oil and odor are removed, and the filtered water is made of polypropylene To 1-5 A pretreatment step in which fine filtration is carried out through a fine filter having pores of cartridges built therein; Through the pretreatment step, the microfiltered filtrate is sequentially introduced into the high-pressure vessel of stainless steel or reinforced plastic through the raw water transfer pump and the reverse osmosis separator having the 1-6 reverse osmosis membranes in a two-stage serial arrangement. The concentrated water that has not passed through the reverse osmosis membrane of the second reverse osmosis separator is drained and the concentrated water that has not passed through the second reverse osmosis separator is returned to the raw water storage tank. Further, the permeated water through which the salt is removed through the reverse osmosis separator is stored in the washing tank, A reverse osmosis process used to clean the surface of the reverse osmosis membrane of the reverse osmosis separator and to be transferred to the treated water storage tank; The treated water stored in the treated water storage tank, which is a high-pressure vessel made of reinforced plastic or polyethylene or stainless steel, is introduced into the quartz filter by the feed pump to replenish the mineral component, and the treated water supplemented with the mineral component is circulated to the treated water storage tank, And a post-treatment step in which the water is supplied to the drinking water or the water is supplied through the pump.

The primary filter mixes sand and anthracite as a filter medium or uses sand alone, while the secondary filter is configured to mix anthracite coal, sand and activated carbon as a filter medium, or use the filter medium alone.

In addition, the precision filter used in the pre-treatment step before the reverse osmosis step is not limited to 1-5 Of the groundwater, or by using a microfiltration filter capable of removing particles of 0.01-0.1 And an ultrafilter ultrafilter capable of removing particles and organic matter of the filter.

In addition, an ultraviolet sterilizer may be installed between the reverse osmosis separator and the reverse osmosis separator to prevent contamination by microbial propagation in the microfilter, or to prevent oxidization and scale of the filtration membrane together with hydrochloric acid or sulfuric acid to adjust the pH of the raw water Which is capable of automatically injecting a disinfectant such as sodium hexafluorophosphate and sodium bisulfite or sodium sulfite at a rate of 0.2-10 ppm.

Also, the reverse osmosis membrane, which is contained in the reverse osmosis separator and removes microorganisms and organic substances contained in the raw water, is a cellulose acetate or polyamide material and has a diameter of 37-203 And a length of 298-1,524 Sized composite membrane in the form of a hollow tube, a plate, a spiral or a rotating oscillating circular structure.

In addition, the raw water transfer pump, which is a high-pressure pump, is configured to be used as a plunger pump, a piston pump, or an underwater torpedo pump according to the salt concentration of raw water.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 schematically shows a water and a water-containing apparatus for water containing salt water and salt of high concentration according to the present invention. The raw water of seawater or coastal groundwater is taken from seawater and coastal groundwater, (Not shown), and is collected in a raw water storage tank 1 made of reinforced plastic (FRP) or polyethylene (PE) material through a pipe, and the raw water storage tank 1 is automatically controlled A water level control sensor (not shown) can be installed and a monitoring pipe made of a transparent material such as an acrylic pipe can be installed so that the water level can be visually observed.

The raw water collected in the raw water storage tank 1 is sent to a primary filter 3 as a rapid sand filter through a transfer pump 2 provided adjacent to the raw water tank and the water is circulated through the raw water to collect clay components, plankton, seaweed and colloidal substances And the substances not removed from the primary filter 3, i.e., taste, odor, color, and organic matter, are removed while passing through the secondary filter 4, which is an activated carbon filter, The primary filter 3 mixes sand with anthracite as a filter medium or uses only sand, while the secondary filter 4 mixes sand and anthracite with activated carbon as a filter medium Or can be used alone.

The filtered water that has passed through the primary filter (3) and the secondary filter (4) in order to filter suspended substances and fine particles, And then sent to a fine filter 5 having pores of cartridges, and subjected to a pre-treatment step in which fine filtration is performed.

Particularly, in the pretreatment step, when the seawater or the groundwater is heavy in the eutrophication of the muddy water or the plankton and the algae, the chemical treatment is preferably carried out before the introduction of the primary filter 3 into the inorganic aggregate and the organic aggregate.

The precision filter (5) has a number A polypropylene (PP) cartridge in which pores of the pores are formed is embedded in a stainless steel housing, and 1-5 Of the groundwater, or by using a microfiltration filter capable of removing particles of 0.01-0.1 An ultrafilter ultrafilter capable of removing particles and organic matter of the filter can be used.

The raw water having passed through the fine filter 5 is introduced into the high-pressure vessel made of stainless steel or reinforced plastic by the raw water transfer pump 6, and the reverse osmosis separator 7 The brine water which has not passed through the reverse osmosis membrane of the first reverse osmosis separator 7 is drained and the second reverse osmosis The concentrated water that has not passed through the reverse osmosis membrane of the separator 13 is conveyed to the raw water storage tank 1 while the premeate water from which the salt is removed through the reverse osmosis membrane of the reverse osmosis separator 7 Is subjected to a reverse osmosis step which is stored in the pre-treatment tank 8 and is used to clean the surface of the reverse osmosis membrane of the reverse osmosis separator (7) (13) by a washing pump (17) and is sent to the treatment water storage tank (9).

Particularly, in the reverse osmosis step, when the raw water is seawater, only the first reverse osmosis separator 7 passes through the first and second reverse osmosis separators 7 and 13 when the salt concentration of the seawater is below 5,000 ppm So that it can be used immediately as drinking water.

Since the raw water transfer pump 6 has a high salt concentration in seawater, / A high pressure pump such as a plunger pump and a piston pump or an underwater torpedo pump can be installed in various ways according to the salt concentration of the raw water.

The ultrafilter 14 may be installed between the reverse osmosis separator 7 and the reverse osmosis separator 7 to prevent contamination by microbial propagation in the microfilter 5, Hydrochloric acid or sulfuric acid together with a disinfecting agent dispenser 16 capable of automatically injecting a disinfectant such as sodium hexafluorophosphate and sodium bisulfite or sodium sulfite to prevent oxidation and scaling of the filtrate.

The reverse osmosis membrane, which is contained in the reverse osmosis separator (7) (13) and removes microorganisms and organic substances contained in the raw water, is made of cellulose acetate or polyamide, and has a diameter of 37-203 And a length of 298-1,524 Sized composite membrane in the form of a hollow fiber, a plate, a spiral or a rotating oscillating circular structure.

The treated water having passed through the reverse osmosis step is stored in a treated water storage tank 9 made of reinforced plastic, high-pressure polyethylene or stainless steel, while water is introduced into the elvan filter 10 to replenish minerals, And returns to the treated water storage tank 9 again in an improved state.

The treated water stored in the treated water storage tank 9 can be directly supplied to the water and drinking water through the water supply pump 12 or can be supplied with drinking water through the separately installed ultraviolet sterilizer 14, It is possible to suppress the contamination of the treated water by the propagation of the microorganisms when the supply distance is long, while the treated water can be supplied through the disinfectant supply vessel 16, which can automatically inject the chlorochalline dioxide at 0.2 ppm-10 ppm. Disinfected and supplied to the drinking water.

On the other hand, a process capable of automatically measuring the quality of the treated water between the reverse osmosis separator 7 (13) in the reverse osmosis step and the treatment water recovering part 9 in the post-treatment step and between the reverse osmosis separator (7) A water quality meter 15 can be installed in the process water quality measurement meter 15. The process water meter 15 can be manually or automatically controlled by attaching a used power meter, process water quality conductivity, water quality temperature, water quality pressure, flow rate indicator, So that the automatic operation can be performed.

[Example]

The specifications of the experimental apparatus used in the embodiment of the present invention are as follows.

Design criteria: Based on 35,000 ppm of TDS in seawater

Based on 5,000 ppm of TDS in coastal groundwater

Treatment quantity: 101 / min

Treatment water quality: Based on drinking water

Seawater inflow: 651 / min

Quantity processed: min 101 / min

Concentrated water discharge: 551 / min

Design temperature: 15

High Pressure Pump: Underwater torpedo for sea water

Piston type for coastal groundwater

Reverse osmosis membrane: Seawater USA Filmtech (4040 SWHR)

For coastal groundwater, USA Hydrogenotics (4040-HSA-SWC2)

Raw water pump: 40A, 2HP (inner FRP coating)

1st and 2nd filter: 260Φ × 950mmH (stainless steel 316L)

Precision filter: 260Φ × 950mmH (stainless steel 316L)

Cleaning tank: 400Φ × 500mmH (polyethylene)

The seawater containing a high concentration of saline was carried out by the following processing steps with an experimental apparatus having the above specifications.

Grain size The seawater taken through a water intake pump with two mesh strainer is transferred to the primary filter (3), where the filter medium used in the primary filter (3) is sand and anthracite.

In order to improve the filtration rate and sterilization rate of the raw water, 10 ppm of sodium hypochlorite and 0.3-0.5 ppm of iron sulfate were injected into the primary filter (3), and the treatment flow rate was 0.15-0.2 m / min.

Anthracite and sand were used for the secondary filter (4), and the treatment flow rate was about 5 m / min.

The seawater sequentially passed through the first and second filters (3,4) is treated with polypropylene (Not shown) through a fine filter 5 having pores as a cartridge and sends filtered water filtered by a raw water transfer pump 6 which is a plunger type high pressure pump through a transfer pump 2, A strainer (not shown) of 1 / 18mesh was installed behind the transfer pump 2 of the apparatus.

In addition, when sodium hypochlorite is used to inhibit and remove microbes such as algae, bacteria, and plankton in seawater, the reverse osmosis membrane of the polyamide material built in the reverse osmosis separators 7 and 13 may be damaged, In order to solve this problem, in this embodiment, Of the ultraviolet sterilizer (14).

Meanwhile, the seawater having passed through the ultraviolet sterilizer 14 is pressurized to pass through the primary reverse osmosis separator 7, and the recovery rate at this time is 30-35 (TDS) was 1006ppm.

The seawater as the permeated water treated in the primary reverse osmosis membrane separator 7 is supplied through a booster pump (not shown) at a rate of 24 to 32 kgf / And then passed through the secondary reverse osmosis separator 13 arranged in series with the primary reverse osmosis membrane separator 7. At this time, the recovery rate was 45 And 40 ~ 60ppm of total quality was obtained.

In order to prevent the oxidation and scale of the reverse osmosis membrane before the second reverse osmosis separator 13 was introduced, / And sodium hexafluorophosphate 0.015k / (7) and (13), and the electricity consumed in the first and second reverse osmosis separators (7) and (13) About 7.4 kwh was required.

The reverse osmosis membrane built in the reverse osmosis separator (7) (13) has a diameter of 37-203 Length 298-1,524 (FRP) for low pressure pipe, PVC (Sch 80) for low pressure pipe and stainless steel (SUS 316L) for high pressure side of reverse osmosis membrane were used as piping material for reverse osmosis membrane pressure vessel.

In addition, the SDI (Silt Density Index) of seawater was measured in the pretreatment stage for 5 minutes and 12 to 24 hours, and for 15 minutes after the primary filtration and the secondary filtration, it was measured to be 5-6 and 1.8-3.1, respectively.

On the other hand, a process water quality measuring instrument 15 capable of automatically measuring the quality of the filtered water of the seawater is installed between the reverse osmosis separator 7 (13) of the reverse osmosis stage and the treated water storage tank 9 of the post- Automatic and manual operation were made possible.

In order to remove contaminants adhering to the reverse osmosis membrane by the seawater to be filtered, EDTA and the like are mixed and then 20-25 Lt; RTI ID = 0.0 > For about 30 minutes to 1 hour.

The results of the measured water quality analysis of the sea water treatment water which has been filtered through the above-mentioned experiment and introduced into the treatment water storage tank 9 are as follows.

[Effects of the Invention]

As described above, according to the seawater of the present invention and the apparatus for drinking water containing salt at a high concentration, reverse osmosis can be used for a large amount of water containing high concentration salts such as seawater and coastal groundwater, It is possible to provide an effect of filtering industrial water and living water by filtering it with treated water.

Claims (3)

The present invention relates to a filtration apparatus for water containing a high concentration of saline, which is capable of filtering high-concentration saline-containing water through high-quality treated water through a reverse osmosis system, and is capable of automatically adjusting the water level by taking seawater or coastal groundwater The raw water from the raw water storage tank 1 is stored in a raw water storage tank 1 which can be visually distinguished. The raw water from the raw water storage tank 1 is mixed with sand and anthracite as a filter medium through the transfer pump 2, The filter material 3 and the filter material are mixed with the anthracite and sand and the activated carbon, or sequentially passed through the second filter 4, which is an activated carbon filter used singly, to remove the floating substances and odors, and the filtered water is passed through the stainless steel housing Polypropylene material 1-5 A pretreatment step of finely filtering through a precision filter (5) used as a disposable or semipermanently backwashed cartridge having pores therein; The filtered water filtered through the pretreatment step is passed through the raw water transfer pump (6) to the high pressure vessel made of stainless steel or reinforced plastic, and it is made of cellulose acetate or polyamide material and has a diameter of 37-203 And a length of 298-1,524 Sized reverse osmosis membrane, which is formed of a hollow fiber type, a plate type, a spiral type, or a rotational vibration type, is sequentially introduced into a reverse osmosis separator (7) (13) arranged in two stages in series, The raw water flowing into the reverse osmosis separator 7 from the reverse osmosis separator 7 is prevented from being contaminated by the microbial propagation through the ultraviolet sterilizer 14 while passing through the reverse osmosis separator 7, The permeated water is stored in the washing tub 8 and is used to clean the surface of the reverse osmosis membrane of the reverse osmosis separators 7 and 13 by the washing pump 17 and is transferred to the treated water storage tank 9, In order to prevent the oxidation and scale of the filtration membrane with hydrochloric acid or sulfuric acid which adjusts the pH of the raw water through the feed tank 16, it is possible to automatically inject the disinfectant such as sodium hydrogencarbonate and sodium bisulfite or sodium sulfite, Station An osmotic phase; The treated water stored in the treated water storage tank 9, which is a high-pressure vessel made of reinforced plastic or polyethylene or stainless steel, is introduced into the crush stone filter 10 by the supply fence 11 to replenish mineral components, And a post-treatment step of circulating the treated water to the treated water storage tank (9) and supplying it as potable water or water to the potable water via the water supply pump (12). 2. The method of claim 1, wherein the microfilter (5) used in the pretreatment step prior to the reverse osmosis step comprises 1-5 Of the groundwater, or by using a microfiltration filter capable of removing particles of 0.01-0.1 Wherein the water and water content of the seawater is higher than that of the seawater. The water system according to claim 1, wherein the raw water transfer pump (6) as a high-pressure pump is used as a plunger pump, a piston pump or an underwater torpedo pump according to the salt concentration of raw water.