KR100744742B1 - Limewater consecutive product and injention device for product of high-quality tap water - Google Patents

Abstract

A consecutive limewater production and injection apparatus for producing high-quality tap water which can maximize the utilization of slaked lime by continuously producing and injecting slaked lime saturated water(limewater) of low turbidity into filtered or purified water, and reusing separated slurry in the front part of the coagulation process is provided. A consecutive limewater production and injection apparatus for producing high-quality tap water comprises: an aqueous slaked lime solution supplying part including a dissolution water supplying unit, a continuous slaked lime injecting unit, a slaked lime diluting tank, and an aqueous slaked lime solution-supplying unit; a saturator part including a saturator(300) having a coagulation chamber(26), a central pipe(76), a peripheral pipe(77), a settling chamber(27), a saturated water producing chamber(24), a calcium carbonate formation preventing film(22), a packing material finger(80), and a saturated water collecting pipe(29); a saturated water supplying part including a saturated water tank(400), a saturated water supplying pump(34), and a diffuser(36) for saturated water pipe injection; and a slaked lime slurry treating part including a slurry storing and dissolving tank(500), a carbon dioxide injecting ejector(49), and an inline mixer(50). The dissolution water supplying unit comprises a dissolution water control valve(11), a dissolution water flow meter(12), and a dissolution water thermometer(13). The continuous slaked lime injecting unit comprises a slaked lime powder storage hopper(14), a slaked lime feeder(15), a crushing screw(58), a gate(59), and an agitating plate(57). The slaked lime diluting tank comprises a rotating pipe(62), a slaked lime diluted water ejector(18), and a feeding pump(17). The aqueous slaked lime solution-supplying unit comprises an agitating vane(91), an agitation shaft(90), an agitation motor(20), radial separating plates(92), and a perforated plate(23).

Description

Limewater consecutive product and injention device for product of high-quality tap water}

Figure 1a is a schematic block diagram of a saturated water continuous injection facility according to an embodiment of the present invention.

FIG. 1B schematically illustrates a control unit for controlling the valve of FIG. 1A.

2 is a schematic of a synergistic fill finger.

3 is a bottom view of a synergistic filler finger.

Figure 4 is a graph of treated water pH, turbidity change according to the application of the corrosive process.

Figure 5 is a graph of disinfection byproduct production evaluation (THMFP concentration change) by the injection of lime and carbonated water.

6 is a graph of disinfection byproduct production evaluation (HAAFP concentration change) by injection of lime and carbonated water.

7 is a graph of the corrosive water improvement effect (pH change according to CO 2 injection amount change) according to the continuous process application.

8 is a graph of corrosive water quality improvement effect (LI index change according to pH control) according to a continuous process application.

<Brief description of the main parts of the drawing>

11: Dissolved water shutoff valve 12: Dissolved water flow meter

13: dissolved water thermometer 14: powdered lime lime storage hopper

15: slaked lime feeder 16: slaked lime dilution tank

17: slaked lime dilution water supply pump 18: slaked lime dilution water ejector

19: dissolved water refill tube 20: stirring motor

21: stirring motor 22: calcium carbonate formation prevention film

23: perforated plate 24: saturated water generating chamber

25: alarm water level 26: agglomeration chamber

27: sedimentation chamber 28: washing water supply pipe

29: saturated water collection pipe 30: turbidimeter

31: stirring motor 32: saturated water tank water gauge

33: Alarm level 34: Saturated water supply pump

35: flow meter 36: saturated water pipe injection diffuser

37: carbon dioxide supply unit 38: carbon dioxide pipeline injection diffuser

41: discharge valve 43: slurry supply pump

44: stirring motor 45: water gauge

46: slurry injection pump 47: slurry flowmeter

48: carbon dioxide supply 49: carbon dioxide injection

50: in-line mixer 51: water level adjustment overflow tank

52: saturated water inlet pipe 53: stirrer

54: discharge valve 55: stirring shaft

56: stirring blade 57: stirring plate

58: grinding screw 59: gate

60: stirring motor 61: slaked lime inlet

62: swirl tube 63: molten water control valve

64: manual control valve 65: control valve

67: control valve 70: slaked lime dilution water supply pipe

71: discharge valve 72: discharge valve

73: second slurry discharge pipe 74: stirring blade

75: stirring shaft 76: center tube

77: perimeter tube 78: isolation wall

79: perforated plate 80: filling finger

81: restraining plate 82: finger body

84: washing nozzle 85: filling

86,87: Separation Perforated Plate 90: Stirring Shaft

91: stirring blade 92: separation plate

93: third slurry discharge pipe 95: first slurry discharge pipe

96: purified water pipe 97: purified water flow meter

98: purified water system 100: slaked lime continuous injection device

200: aqueous solution of slaked lime 300: saturator

400: saturated water tank 500: slurry storage melting tank

600: control unit

The present invention relates to a continuous manufacture and injection device of hydrated lime water for the production of high-quality tap water, to increase the concentration of powdered lime in order to prevent corrosion of drainage and water supply pipes in filtered or purified water, and to minimize the amount of slurry generated while carbonate and carbonate Low turbidity (less than 10NTU) slaked lime containing lime containing a large amount of saturated lime (lime water) is produced and injected in a continuous process, and the separated slurry is reused at the front end of the flocculation process to make high quality tap water to maximize the use of slaked lime. Saturated water continuous production and injection device.

Although water quality factors such as pH, alkalinity, calcium, and magnesium vary slightly depending on the raw water intake area, in terms of corrosion of water supply pipes, domestic water sources are protected from the internal surface of soft water with low hardness and alkalinity. There is a characteristic of not forming a film.

In addition, the use of pre and post chlorine treatment, sulfuric acid, a flocculant containing chlorine ions in the water purification process, the corrosivity of the purified water is further increased, the corrosion of the tubular body is promoted.

The inner surface of the pipe is promoted by the corrosive water quality to promote the corrosion of the inner surface of the pipe, resulting in the accumulation of corrosion products, resulting in a decrease in the cross-sectional area of the water or causing water, black water, etc., which is the main cause of tap distrust.

As a method of suppressing the corrosiveness of the water supply pipe, the water treatment method by controlling the corrosive water quality by controlling pH, alkalinity and calcium hardness is the most economical and good way to reduce the corrosion of the water supply pipe. No water treatment for water quality control.

This is because they have anxiety such as excessive pH rise and turbidity of turbidity, and they are not able to cope with it actively, and there is a lack of recognition that controlling corrosion is an economical and effective way to reduce corrosion with water pipes.

Currently, the only water treatment for corrosion control of water supply pipes that is applied in Korea is to use an inhibitor to prevent corrosion of public houses or large buildings.

Existing powdered lime is mixed with dilution water to make lime water in the form of slurry and injected immediately, or when stored and stored in a storage tank, and in contact with atmospheric carbon dioxide by stirring in the storage tank as time passes. A large amount of white suspended insoluble matter is generated, and due to impurities contained in powdered lime, the concentration of lime is low, and thus, even when carbon dioxide is injected into the filtered water or purified water, it is impossible to completely dissolve, leading to an increase in turbidity.

An object of the present invention devised to solve the above problems is to increase the concentration of powdered lime in order to prevent corrosion of drainage and water supply pipes in filtered or purified water, and to minimize the amount of slurry, while containing a large amount of carbonate and calcium carbonate. Continuous production of low-water turbidity (less than 10NTU) of hydrated lime (lime water) in a continuous process, and the separated slurry is reused at the front of the coagulation process to continuously produce saturated limewater for high-quality tap water to maximize the use of lime. It is to provide an injection device.

Another object of the present invention, by using carbon dioxide together to achieve the ease of pH adjustment of the treated water while reducing the corrosion of the tap water to form a protective film on the inner surface of the pipe to prevent corrosion of the pipeline, Minimize the formation of calcium carbonate (contact with carbon dioxide in the air), produce clean saturated water (less than 10NTU) with few microsuspension insoluble substances, and inject it into filtered or purified water, and then easily control the injection rate by using carbon dioxide together. In addition, the present invention provides an apparatus for continuously manufacturing and injecting saturated lime water that enables high quality tap water production by controlling the corrosiveness of tap water without causing an increase in purified turbidity.

It is another object of the present invention to minimize the formation of calcium carbonate (contact with carbon dioxide in the air) of saturated lime water (lime water), thereby producing clean saturated water (less than 10 NTU) with little suspended insoluble matter and filtering or purifying it. By directly injecting water and using a carbon dioxide aqueous solution together with the pH value, it hardly causes an increase in water turbidity and controls the corrosiveness of tap water to prevent corrosive corrosion, forming a protective film on the inner surface of the pipe to produce high-quality tap water. It is to provide a hydrated saturated water continuous production and injection device that makes it possible.

The present invention for achieving the above object is an aqueous solution of slaked lime which continuously supplies the mixed lime with dissolved water; A saturator for continuously depositing and sedimenting the diluted lime water supplied from the aqueous solution of slaked lime to obtain saturated water; Saturated water supply unit for injecting the saturated water obtained from the saturator unit with the carbon dioxide to the purified water pipe; And adding a dissolved lime and carbon dioxide to the slurry produced from the limestone aqueous solution, the saturation base, and the saturated water supply to form calcium carbonate to supply calcium hydroxide to supply the pH adjusting agent of raw water. Slaked lime saturated water continuous production and injection device.

The calcined lime solution supply portion and the saturated base portion is characterized in that the contact with the air to prevent the formation of calcium carbonate.

In addition, the temperature of the dissolved water is 4 ~ 20 ℃, the lime is characterized in that the input to have a concentration of 1,200 ~ 1,600PPM compared to the dissolved water.

In addition, the slaked lime aqueous solution supply unit, the melted water supply device for supplying the dissolved water at a constant flow rate; Sintered lime continuous injection device for continuously injecting powdered hydrated lime into the dissolved water by the dissolved water supply device; A slaked lime dilution tank for dissolving dissolved water and slaked lime supplied from the dissolved water supply device and the continuous lime injection device; And a slaked lime dilution water supplied from the slaked lime dilution tank for secondary dissolution and supplying a slaked lime aqueous solution to the saturated portion.

In addition, the molten water supply apparatus is installed in a pipe connected to the molten water supply source, the melted water control valve for adjusting the flow rate of the melted water, a melted water flow rate for measuring the flow rate of the dissolved water in the pipe, and the dissolved in the pipe It characterized in that it comprises a dissolved water thermometer for measuring the temperature of the water.

In addition, the continuous lime injection device, the powdered lime lime storage hopper receiving the slaked lime through the slaked lime inlet connected to the source of the slaked lime; A slaked lime feeder installed at a lower end of the powdered slaked lime storage hopper for forcibly discharging slaked lime; A crushed screw installed at the top of the slaked lime feeder to break up the aggregated slaked lime; A gate installed at an upper side of the grinding screw to control the amount of slaked lime sent to the slaked lime feeder; And it is characterized in that it comprises a stirring blade for supplying the hydrated lime in the powdered lime storage hopper toward the gate while rotating by a stirring motor.

In addition, an upper portion of the slaked lime dilution tank is connected to the continuous slaked lime injection device, a side thereof is connected to the dissolved water supply device, and a spiral protrusion is formed therein to dissolve the slaked lime by turning of the dissolved water. Swivel hall; A slaked lime dilution water ejector connected to the molten water supply device for ejecting and supplying the molten water at a high speed; And a feed pump for supplying the first diluted slaked lime diluted water to the slaked lime aqueous solution supply device.

In the calcined lime aqueous solution supply device, a stirring blade for dilution is provided in a stirring shaft in a normal body, and the stirring shaft is integrated with a stirring motor and rotated by the stirring motor. A radial separation plate for promoting agitation dissolution and separating and discharging the undissolved solids is provided outside, and a porous plate for generating a circulation flow above the stirring blade is installed.

In addition, the saturation base portion is formed with an agglomeration chamber that is separated by a separation wall at the bottom of a normal body, and the agglomeration chamber and an open central tube are integrally formed. The circumferential tube opened to the lower side of the furnace is formed, and a settling chamber communicating with the circumferential tube to the upper side of the agglomeration chamber is formed by a porous plate, and a saturated water generating chamber is formed above the settling chamber, A calcium carbonate formation preventive film is provided to prevent contact between saturated water and air. A filler finger for filtering slaked lime dilution water is provided in each hole of the porous plate in the saturated water generating chamber, and the carbonic acid on top of the saturated water snow chamber is installed. Characterized in that the saturator is provided with a saturated water intake pipe for collecting and discharging saturated water at the bottom of the calcium formation prevention film.

In addition, the bottom surface of the flocculation chamber, the sedimentation chamber, and the saturated aquatic production chamber is formed to be inclined, and each of the slurry discharge ports is provided.

In addition, the saturation base portion is the same level as the saturation water intake pipe and is further provided with a water level adjustment overflow tank receiving the saturated water from the saturation water intake pipe, the turbidity of the saturated water in the water level adjustment overflow tank A turbidimeter for detecting is installed.

The saturated water supply unit may include a saturated water tank connected to the saturated water supply unit to receive saturated water, and a saturated water pipe injection diffuser for injecting saturated water from the saturated water tank into a purified water pipe through a saturated water supply pump. Characterized in that.

In addition, the saturated water inlet pipe connected to the saturator to supply the saturated water to the saturated water tank is introduced into the curved pipe along the inner wall of the saturated water tank to prevent internal disturbance of the saturated water tank when saturated water is introduced. do.

In addition, the slaked lime slurry treatment unit, a slurry storage melting tank for storing and stirring the collected slaked lime slurry; A carbon dioxide injection ejector that receives the slaked lime slurry discharged from the slurry storage melting tank through a slurry injection pump, receives carbon dioxide from a carbon dioxide supply device, and mixes and discharges the mixed slurry with the slaked lime slurry; And an inline mixer connected to the carbon dioxide injection ejector and having a spiral mixing baffle installed therein to dissolve and discharge the carbon dioxide and the slaked lime slurry.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described. In adding reference numerals to the components of the following drawings, the same components only have the same reference numerals as much as possible even if displayed on different drawings, it is determined that may unnecessarily obscure the subject matter of the present invention Detailed descriptions of well-known functions and configurations will be omitted.

When powdered lime is mixed with dissolved water to make a diluent and stored in a storage tank for a long period of stirring, contact with carbon dioxide in the air produces a large amount of white suspended insoluble matter (CaCo ₃ ). Accordingly, it is difficult to settle sediment of sedimented water in the saturator, and due to the increase in turbidity, even when injecting carbon dioxide (CO ₂ ) by PH control, complete dissolution is not achieved and water turbidity is not lowered to less than 0.1 NTU. It is not possible to inject directly into filtered water or purified water pipe.

In addition, when the required amount of slaked lime is temporarily added to a container of a certain volume to produce saturated water, the cumbersome operation of the intermittent operation, the equipment cost, and the installation area are excessively required.

Therefore, in order to compensate for this, by precisely weighing powdered lime continuously and directly injecting it into dissolved water, it blocks contact with atmospheric carbon dioxide and produces low saturated turbidity (less than 10 NTU) lime water in a continuous process. The system was configured to inject directly into the system, and the dilution water concentration (PPM) was adjusted to 1600PPM at 4 ° C and 1200PPM at 20 ° C by measuring the real-time dissolved water temperature in the dissolved water thermometer.

In addition, by injecting a separate high pressure carbon dioxide (CO ₂ ) gas solution in parallel with lime saturated water, it is designed to maintain turbidity, adjust pH value and improve pipe corrosion index (LI) according to water quality standards.

Slurry lime saturated water continuous injection dissolution equipment for corrosion protection of water pipes can be divided largely into the limestone aqueous solution supply, saturated base portion. It comprises a saturated water supply unit and the slaked lime slurry treatment unit.

First, the slaked lime aqueous solution supply unit will be described.

The slaked lime aqueous solution supply unit comprises a melted water supply device, a continuous slaked lime injection device, a slaked lime dilution tank, and a slaked lime aqueous solution supply device.

The melted water supply device includes a melted water control valve 63 installed in a pipe connected to a melted water source (not shown) to block the flow of the melted water, and a melted water flow meter for measuring the flow rate of the dissolved water in the pipe. And a dissolved water thermometer (13) for measuring the temperature of the dissolved water in the pipe.

In addition, the shutoff valve 11 is placed in front of the dissolved water flowmeter 12 to control the supply of the dissolved water.

In addition, the hydrated lime continuous injection device 100 is a roughly cone-shaped powder hydrated lime storage hopper 14 which receives the hydrated lime through the hydrated lime inlet 61 connected to the source of hydrated lime (not shown), the lower portion of the hydrated lime storage hopper Is installed in the slaked lime feeder 15 forcibly discharging the hydrated lime, the crushed screw feeder 15 is provided on the crushed screw 58 to crush the aggregated hydrated lime, installed on the upper side of the crushed screw 58 And a gate 59 for controlling the amount of slaked lime sent to the feeder 15, and a stirring plate 57 for feeding the slaked lime in the powdered lime lime storage hopper toward the gate while rotating by the stirring motor 60. .

The slaked lime feeder 15 is connected to the turning tube 62 to supply the slaked lime vertically, and the pipe connected to the control valve 63 is connected to the side of the turning tube 62 to supply dissolved water, The slaked lime is primarily mixed with the dissolved water in the swirl tube 62. At this time, a spiral protrusion (not shown) is formed inside the swirl tube 62 to help the dissolved water and the lime water mix by turning the dissolved water along the spiral protrusion.

A manual control valve 64 is installed between the swirl tube 62 and the control valve 63 to adjust the flow rate of the dissolved water.

Further, the slaked lime dilution tank 16 is integrally installed at the lower end of the swirl tube 62, and the slaked lime dilution tank 16 is connected to the slaked lime dilution water ejector 18 for ejecting and supplying the dissolved water at high speed.

Therefore, in the slaked lime dilution tank 16, the slaked lime is first diluted by the dissolved water and lime water mixed from the swirl tube 62 and the dissolved water supplied from the slaked lime dilution water ejector 18.

The slaked lime dilution tank 16 is connected to the slaked lime dilution water supply pump 17 to supply the first diluted slaked lime diluted solution toward the slaked lime aqueous solution supply device 200.

The slaked lime dilution water supply pump 17 may be installed as a pair in order to prepare for failure due to clogging.

The slaked lime dilution water ejector (18) is connected to the control valve (63) on which the dissolved water is input, the output is two directions, one direction is connected to the slaked lime dilution tank (16), and two directions of the slaked lime solution supply device. Connected with 200.

In order to adjust the input of the slaked lime dilution water ejector 18 and the output in two directions, control valves 65 and 67 are provided, respectively.

The slaked lime aqueous solution supply device 200 has three inputs, the first is the slaked lime dilution water supply pump 17 of the slaked lime dilution tank 16, the second two-way output of the slaked lime dilution water ejector 18, Third is by the dissolved water replenishment pipe (19).

The dissolved water replenishment pipe 19 is connected to the control valve 63, the control valve 66, 68 for adjusting the flow rate is installed.

The slaked lime aqueous solution supply device 200 dilutes slaked lime secondly, and the diluted slaked lime dissolved water is supplied to the saturator 300.

In addition, the slurry in the slurry aqueous solution supply device 200 is supplied to the slurry storage dissolution tank 500 side.

In the calcined lime aqueous solution supply device 200, a stirring blade 91 for dilution is installed on the stirring shaft 90, and the stirring shaft 90 is integrated with the stirring motor 20 to the stirring motor 20. Rotating by generating a plurality of separation plates 92 radially to generate strong turbulence outside the stirring blade 91 to promote stirring dissolution and to separate and discharge the undissolved solids.

The calcined lime aqueous solution supply device 200 is a rising flow is suppressed by the porous plate 23 installed on the upper side of the stirring blade 91 to generate a circulating flow, thereby generating a micro floc sedimentation settling of the saturator 300 This facilitates the production of saturated water of low turbidity (less than 10 NTU).

In addition, a discharge valve 41 is installed at a lower side of the separator plate 92 of the slaked lime solution supply device 200 to secure a predetermined space to store the cosmetics and discharge the slurry, thereby periodically determining the discharge of the slurry. do.

Hereinafter, a saturator 300 for generating saturated water will be described.

The saturator 300 is a tank having a conical shape so that the bottom portion of the body has an inclined surface.

The above shape is intended to allow the sludge to easily collect downward, and other shapes are possible.

Agglomeration chamber 26 is isolated from the outside by the isolation wall 78 in the bottom center portion, the agitation blade 74 connected to the stirring shaft 75 is installed in the center of the agglomeration chamber 26, The stirring shaft 75 is rotated by the stirring motor 21.

A slaked lime dilution water supply pipe 70 connected to the slaked lime solution supply device 200 is installed in the agglomeration chamber 26, and the slaked lime dilution water is supplied into the saturator 300.

The first slurry discharge pipe 95 is formed below the agglomeration chamber 26 to discharge the slaked lime which is not dissolved in the reception chamber 26 and becomes a slurry.

A central tube 76 is integrally formed above the agglomeration chamber 26, and the stirring shaft 75 extends inside the central tube 76.

In addition, the center tube 76 is formed to open upward from the upper end of the saturator 300, the circumference tube 77 is provided to the outside of the center tube 76.

In addition, the circumferential tube 77 has a lower side, and a lowering chamber 27 is formed below the circumferential tube 77, and the settling chamber 27 is located above the agglomeration chamber 26.

In addition, the settling chamber 27 has an upper wall formed of a porous plate 79.

In addition, the isolation wall 78 is inclined downward toward the outside of the saturator 300, so that undissolved slaked lime is accumulated in the settling chamber 27 to the outside, and the settling chamber 27 It is discharged through the second slurry discharge pipe (73) installed on the lower one side.

The saturated water production chamber 24 is formed above the settling chamber 27, and the filler finger 80 is installed in each of the holes of the porous plate 79.

Accordingly, the slaked lime dilution water introduced into the agglomeration chamber 26 is upwardly passed through the center tube 76, and downwardly through the circumferential tube 77, and introduced into the settling chamber 27. The slaked dilution water introduced into (27) passes through the porous plate 79 and the filling finger 80 to the saturated water producing chamber 24.

Most importantly, no drastic changes in the flow rate should be made. This is by adjusting the flow rate of the unsaturated lime lime dilution water supplied.

As shown in FIGS. 2 and 3, the filler finger 80 is provided with a hat-shaped suppressor plate 81 on the upper side of the cylindrical finger body 82, and the cylindrical finger body 82 of the cylindrical finger body 82 is provided. The upper and lower ends are provided with separate porous plates 86 and 87, respectively.

Inside the finger body 82, a washing nozzle 84 integral with the washing water supply pipe 28 is installed, and a filling 85 is installed.

The washing water supply pipe 28 is branched to receive the washing water from an external washing water source (not shown) and to supply the filling finger 80 with each of the filling water.

The cleaning nozzle 84 is made by creating a plurality of holes around the pipe.

As the filler 85, a sphere or a tube made of a polypropylene or polyethylene material may be used.

Accordingly, the diluted lime water introduced into the filler finger 80 through the settling chamber 27 is a saturated water in a complete state while the undissolved slaked lime particles are removed by the filler 85 and thus the saturated water production room ( 24).

In addition, when hydrated lime accumulates on the filler 85 of the filler finger 80 and the filler finger 80 loses the removal of the hydrated lime particles, the filler 85 is sprayed with the washing water 84 to spray the wash water. Drain the lime from

At this time, the slaked lime discharged from the filler 85 is sedimented by its own weight, is accumulated on the upper side of the porous plate 79, and the porous plate 79 inclined downward toward the outer circumferential surface of the saturator 300. ) Is sent to the outside, and is discharged to the third slurry discharge pipe (93) provided on one side of the lower portion of the saturated water production chamber (24).

In order to detect the filling clogging of the filling finger 23 by monitoring the filling finger clogging alarm water level 25 to recognize the filling washing time, the filling was to be washed by the injection of the washing water.

A calcium carbonate formation preventing film 22 is provided above the saturated water production chamber 24 to prevent calcium carbonate formation of saturated water, and the saturated water production chamber 24 below the calcium carbonate formation preventing film 22. Saturated water collection pipe 29 for collecting and discharging the saturated water generated in is installed.

The saturated water intake pipe 29 is a finger-type submersible orifice intake pipe, and the collection pipe is installed at the center of the saturator 300 in order to prevent turbidity increase due to the drift of the rising water of the saturated water in the saturated water production chamber 24. , Radially arranging branch pipes punctured with a plurality of suction balls along the inner wall surface of the saturator 300, and installing a "T" shaped suction ball on the upper part of the branch pipes for the distribution of the suction flow, and smoothly distributing the flow of the entire surface of the upper It is supposed to take a sedimentary supernatant.

The calcium carbonate formation preventing film 22 functions to prevent the formation of calcium carbonate (in contact with carbon dioxide in the air) of saturated water, and to suppress the flow at the highest water level of the saturator 300 and to maintain a constant pressure.

Saturated water generated from the saturator 300 is supplied to the water level adjustment overflow tank 51, and a turbidity meter 30 is installed in the water level adjustment overflow tank 51, thereby continuously detecting the turbidity of the saturated water. do.

The water level adjustment overflow tank 51 is a sealed water level adjustment overflow tank having the same level as the saturation water intake pipe 29, and the saturated water generation chamber 24 due to the minute water level drop of the saturator 300 when the operation is stopped. It serves to prevent the inflow of the calcium carbonate film formed in the upper portion into the saturated water tank (400).

The saturated water supply unit includes a saturated water tank 400, a saturated water supply pump 34, and a diffuser 36 for supplying a saturated water pipe.

The saturated water passing through the water level adjustment overflow tank 51 is supplied to the saturated water tank 400 through a saturated water inlet pipe 52 connected to the water level adjustment overflow tank 51.

The saturated water inlet pipe 52 is introduced into the curved pipe along the inner wall of the saturated water tank 400 to prevent internal disturbance of the saturated water tank 400 when saturated water is introduced.

The saturated water tank 400 is provided with a saturated water tank level gauge 32 and an alarm water level meter 33 to adjust the amount of saturated water in the saturated water tank 400.

In addition, the saturated water tank 400 is provided with a stirrer 53 for continuously stirring so that the slaked lime is not separated from the saturated water again, and a stirring motor 31 for rotating the stirrer 53.

Then, the slurry of slaked lime which is precipitated again in the saturated water tank 400 is sent to the slurry storage melting tank 500 side through the discharge valve 54.

A saturated water supply pump 34 is installed outside the saturated water tank 400, and a flow meter 35 is installed at a rear end of the saturated water supply pump 34.

In addition, a diffuser 36 for injecting saturated water pipes connected to the flow meter 35 is installed in the purified water pipe 96. Further, a carbon dioxide pipeline injection diffuser 38 connected to the carbon dioxide supply device 37 is installed downstream from the saturated water pipe injection diffuser 36 of the purified water pipe 96.

Therefore, purified water may be generated due to inflow of saturated water and inflow of carbon dioxide in the purified water pipe 96.

A purified water flow meter 97 is installed in the purified water pipe 96 to measure the flow rate flowing in the purified water pipe 96 in real time, and a purified water pH meter 98 is provided to diffuse the saturated water pipe. The pH of the purified water flowing in the purified water pipe 96 may be measured by the influence of the 36 and the carbon dioxide pipe injection diffuser 38.

The slaked lime slurry treatment part includes a slurry storage dissolution tank 500, a slurry supply pump 43, a slurry injection pump 46, a carbon dioxide injection ejector 49, and an inline mixer 50.

Slurry lime solution discharged through the slaked lime aqueous solution supply device 200, the first to third slurry discharge pipe (95, 73, 93), and the saturated water tank 400 of the saturator 300 is a slurry storage melting tank ( 500).

To this end, a slurry supply pump 43 may be installed at the front end of the slurry storage melting tank 500.

The slurry storage dissolution tank 500 includes a stirring blade 56 for stirring, a stirring shaft 55 on which the stirring blade 56 is installed, and a stirring motor 44 for rotating the stirring shaft 55. Is installed.

Slurry lime slurry stored as described above because the precipitation and precipitation phenomenon easily occurs, in order to prevent this it is necessary to continuously stir the stirring blade 56.

Then, a water gauge 45 is installed in the slurry storage dissolution tank 500 to adjust the amount of the internal slurry.

A discharge port for discharging the slurry therein is formed on one side of the slurry storage dissolution tank 500, the discharge port is connected to the slurry injection pump 46.

The slurry injection pump 46 may be configured in pairs to prevent failure.

In addition, a slurry flow meter 47 is provided at the rear end of the slurry injection pump 46 to check the flow rate of the slurry.

The slurry is injected into the carbon dioxide injection ejector 49 together with the dissolved water supplied from the dissolved water source, and the carbon dioxide injection ejector 49 is injected with carbon dioxide from the carbon dioxide supply device 48.

In addition, the dissimilar carbon dioxide injection ejector 49 is connected to the inline mixer 50, and the dissolved water, the slurry, and the carbon dioxide are completely dissolved in the inline mixer 50 into which the spiral mixing baffle is inserted.

Then, the produced mixture is injected into the pre-aggregation step for controlling the raw water PH.

In order to monitor and control all the above processes, as shown in FIG. 1B, various valves and measuring devices were electrically connected to one control unit 600.

Example 1

Saturated lime water by applying the invention process described above was applied to the actual process filtration effluent and analyzed by measuring turbidity, pH, disinfection by-product, and LI index according to the injected amount.

The turbidity of the applied slaked saturation water was about 6NTU, pH was about 12.7, strong alkaline water quality, and the injection concentration was 16, 32, 48mg / L and the pH and turbidity change according to the injection were measured. .6) was injected until the pH of the process water reached 7.5, 7.8, and 8 to show the turbidity treatment capacity for each injection volume.

The pH increased from 6.79 up to 11 and the turbidity increased from 0.05 to 0.5 NTU, but the turbidity dropped to about 0.07 NTU in both the CO2 injection ratios.

The initial turbidity was increased at all the lime-melted precipitated water injection ratios, but after the injection of carbon dioxide water, all the treated waters were found to have a lower turbidity of less than 0.1 NTU (see FIG. 4).

Example 2

The degree of disinfection by-products (FP) was analyzed according to the amount of saturated lime water injected and the amount of carbon dioxide applied (pH 7.5, 7.8, 8.2, 8.5).

Next, FIG. 5 shows the THMFP change as a graph. When only the lime-melted water is injected, it is increased from 0.03 to 0.048 mg / L as the injection amount increases. The concentration was decreased to 0.02 mg / L, which is similar to 0.0024 mg / L.

Figure 6 shows the change in HAAFP as a graph, when only lime was injected, it was higher than the dissolved concentration of 0.0167 mg / L of the effluent, but decreased again after the carbon dioxide injection process and was reduced to the same concentration as the filtered water before the process.

The generation of disinfection by-products from the injection of saturated limestone water did not show any significant problem due to the decrease in pH due to the injection of carbonated water and the FP concentration, which temporarily increased due to forced dissolution of residual limestone.

[Table 1] Filtrate Disinfection Byproduct Concentration

THMFP CHFP HAAFP Dissolved amount (mg / L) 0.0207 0.0044 0.0167

Example 3

The change of pH and pipe corrosion index (LI index) of treated water according to the change of injection amount of slaked lime and carbonated water

Injection of slaked lime 8, 16, 32mg / L and adjusted the pH to 7, 7.5, 7.8 using carbonated water and compared the turbidity and LI index.

The higher the amount of slaked lime injected, the more the amount of CO ₂ required to adjust the pH, but the most effective in improving corrosive water quality. Set the applied amount of saturated lime water

[Table 2] Effect of Corrosive Water Quality Improvement on Injection of Lime and Carbonated Water

Water temperature (℃) pH Cond. (umhos / cm) Alkality (mg / L) Ca ²⁺ (mg / L) CO ₂ injection amount (mg / L) LI index Turbidity (NTU) filtrate 19.8 6.74 93.8 14.9 26 - -1.99 0.051 Injection of hydrated lime 8mg / L  21.4 7.8 110.4 25.5  37 6.84 -0.58 0.071 7.5 105.8 25.8 7.18 -0.82 0.069 7.0 108.8 25.9 11.91 -1.05 0.069 Slaked lime 16mg / L  22.9 7.8 128.5 35.6  47 15.12 -0.25 0.069 7.5 130.8 35.5 16.3 -0.45 0.066 7.0 131.8 35.8 20.53 -0.78 0.067 Injection of hydrated lime 32mg / L  22.3 7.8 157.9 45.9  57 41.39 -0.05 0.068 7.5 158.1 46.0 46.54 -0.24 0.069 7.0 158.4 45.7 50.59 -0.75 0.071

In the above embodiment, the lime dissolution process due to the precipitation process may dissolve the diluted lime water in a high concentration. When the lime was dissolved in carbonated water, it was found that the application of low concentration dilution water showed excellent ability, and there was little concern about inducing turbidity and disinfection by-products by the process application.

The application of the corrosive control process according to the present invention does not affect the turbidity of the water quality, and can exhibit an effective ability in the control of the corrosive control and the production of high-quality tap water.

As described above, it has been described with reference to the preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

As described above, the pure calcined lime water and carbon dioxide according to the present invention is directly put into the filtered water or purified water pipeline by PH control to prevent corrosion of the water supply pipe with a coating coating for maximizing the corrosion protection of the water purification plant pipeline, metal elution and microbial regrowth In addition, the cost of astronomical replacement can be reduced by extending the life of the pipeline, and consequently, the water quality change of the tap water produced in the purification plant and the tap water taken from each household can be minimized, thereby maximizing the production of high quality tap water.

In addition, through the present invention, it is possible to recycle the slaked lime slurry produced after producing the slaked lime saturated water.

Claims (14)

An aqueous solution of slaked lime which is continuously mixed with the dissolved lime with dissolved water; A saturator for continuously depositing and sedimenting the diluted lime water supplied from the aqueous solution of slaked lime to obtain saturated water; Saturated water supply unit for injecting the saturated water obtained from the saturator unit with the carbon dioxide to the purified water pipe; And Slaked lime for the production of high-quality tap water, including a slaked lime slurry treatment unit for supplying to the pH adjuster of the raw water by forming the calcium carbonate by adding dissolved water and carbon dioxide to the slaked lime slurry generated from the aqueous solution of lime, the saturation base, the saturated water supply Saturated water continuous production and injection device. The method of claim 1, wherein the aqueous solution of the lime lime supply and the saturated base portion is a continuous production and injection of saturated lime water for producing high-quality tap water, characterized in that the contact with air to prevent the formation of calcium carbonate. The method according to claim 1, wherein the temperature of the dissolved water is 4 ~ 20 ℃, the hydrated lime is continuously manufactured and injected apparatus for high-quality tap water, characterized in that the input is so as to have a concentration of 1,200 ~ 1,600PPM compared to the dissolved water . The method of claim 1, wherein the aqueous solution of slaked lime, Dissolved water supply device for supplying the dissolved water at a constant flow rate; Sintered lime continuous injection device for continuously injecting powdered hydrated lime into the dissolved water by the dissolved water supply device; A slaked lime dilution tank for dissolving dissolved water and slaked lime supplied from the dissolved water supply device and the continuous lime injection device; And Slurry lime saturated water continuous production and injection apparatus for dissolving the slaked lime dilution water supplied from the slaked lime dilution tank secondary, supplying the aqueous solution of slaked lime to the saturation part. The molten water supply apparatus of claim 4, wherein the molten water supply device is installed in a pipe connected to the molten water supply source, and a molten water control valve for adjusting the flow rate of the molten water, a molten water flow meter for measuring the flow rate of the molten water in the pipe; Sintered lime saturated water continuous production and injection device for producing high-quality tap water, characterized in that it comprises a dissolved water thermometer for measuring the temperature of the dissolved water in the pipe. According to claim 4, The slaked lime continuous injection device, Powdered hydrated lime storage hopper supplied with hydrated lime through a hydrated lime inlet connected to the source of hydrated lime; A slaked lime feeder installed at a lower end of the powdered slaked lime storage hopper for forcibly discharging slaked lime; A crushed screw installed at the top of the slaked lime feeder to break up the aggregated slaked lime; A gate installed at an upper side of the grinding screw to control the amount of slaked lime sent to the slaked lime feeder; And Saturated lime continuous water production and injection device for producing high-quality tap water, characterized in that it comprises a stirring blade for supplying the slaked lime in the powdered lime storage hopper toward the gate while rotating by a stirring motor. The said slaked lime dilution tank is a A swivel tube having an upper portion connected to the continuous lime injection device, a side portion connected to the molten water supply device, and having a spiral protrusion formed therein to dissolve the slaked lime by swirling the dissolved water; A slaked lime dilution water ejector connected to the molten water supply device for ejecting and supplying the molten water at a high speed; And Saturated lime continuous water production and injection device for producing high-quality tap water, characterized in that the supply pump for supplying the first diluted slaked lime dilution water to the aqueous solution of limestone supply. The apparatus of claim 4, wherein the aqueous solution of slaked lime, The stirring blade for dilution is installed in the stirring shaft inside the normal body, The stirring shaft is integrated with the stirring motor to rotate by the stirring motor, A radial separation plate is installed on the outside of the stirring blade to promote stirring dissolution and to separate and discharge undissolved solids. Sintered lime saturated water continuous production and injection device for producing high-quality tap water, characterized in that the porous plate is installed to generate a circulation flow to the upper side of the stirring blade. The method of claim 1, wherein the saturation base unit, In the bottom part of the normal body, an agglomeration chamber is formed which is isolated by a separation wall, The agglomeration chamber and the central tube opened upwards are integrally formed, A peripheral tube opened downward around the center tube, The settling chamber communicating with the circumferential tube to the upper side of the agglomeration chamber is formed by the porous plate, A saturated water generating chamber is formed above the settling chamber, A calcium carbonate formation preventing film is installed at the top of the saturated water generating chamber to prevent contact between saturated water and air. Filling fingers for filtering the diluted lime water in each hole of the porous plate in the saturated water generating chamber, Saturated lime continuous water production and injection device for producing high-quality tap water, characterized in that it has a saturator is installed in the saturated water collecting pipe for collecting and discharging the saturated water at the bottom of the calcium carbonate formation prevention film on the top of the saturated water tank. 10. The method of claim 9, wherein the bottom surface of the flocculation chamber, the sedimentation chamber and the saturated water production room is inclined, the slurry discharge port is continuously produced and injection apparatus for producing high-quality tap water, characterized in that each slurry outlet is installed . 10. The method of claim 9, wherein the saturation base unit has the same level as the saturation water intake pipe and is further provided with a level control overflow tank for receiving saturated water from the saturation water intake pipe, Saturated lime continuous water production and injection device for producing high-quality tap water, characterized in that a turbidity meter for detecting the turbidity of the saturated water is installed in the water level adjustment overflow tank. According to claim 1, wherein the saturated water supply unit is connected to the saturation unit and the saturated water tank receiving the saturated water, and the saturated water pipe injecting the saturated water of the saturated water tank to the purified water pipe through the saturated water supply pump Sintered lime water continuous production and injection device for producing high-quality tap water, characterized in that it comprises a diffuser for. The saturated water inlet pipe connected to the saturator to supply the saturated water to the saturated water tank is introduced into the curved pipe along the inner wall of the saturated water tank to prevent internal disturbance of the saturated water tank. Sintered lime continuous water production and injection device for producing high-quality tap water, characterized in that. According to claim 1, The slaked lime slurry treatment unit, A slurry storage melting tank for storing and stirring the collected slaked lime slurry; A carbon dioxide injection ejector that receives the slaked lime slurry discharged from the slurry storage melting tank through a slurry injection pump, receives carbon dioxide from a carbon dioxide supply device, and mixes and discharges the mixed slurry with the slaked lime slurry; And Sintered limestone continuous production and injection device for producing high-quality tap water, characterized in that it is connected to the carbon dioxide injection ejector is installed inside the spiral mixing baffle dissolving and discharging the carbon dioxide and the lime lime slurry.

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