KR200432593Y1 - Calcium hydroxide feeding apparatus - Google Patents

Abstract

The present invention relates to a filter-applied slaked lime input device, and according to the present invention, the slab is made up of a body, a partition wall bisecting an area excluding the lower part of the body, and an inlet pipe communicating with an upper side of the body. A slaked lime slurry filtration tank for filtering the dissolved water; The slaked lime slurry filtration tank is connected through a filtration tube, and the inflow of the slaked lime provides a slaked lime input device, characterized in that made of a water quality stabilizer to reduce the turbidity by increasing the residence time of the dissolved water, according to the present invention Maintaining proper alkalinity can improve and improve the efficiency of flocculation and sedimentation of raw water, while maintaining proper alkalinity of purified water to prevent corrosion and sludge of the pipe due to the presence of excessive amount of free erosive free carbonic acid. It can reduce the amount of water and prevent the clouding phenomenon to prevent watering phenomenon and to prevent the coloring phenomenon due to the increase in acidity, and can improve the taste of the constant water to the spring water level.

Description

Calcium hydroxide feeding apparatus

1 is a flow chart illustrating a conventional general purified water and effluent treatment process.

2 is a conventional general water treatment system diagram.

Figure 3 is a schematic diagram showing a slaked lime input device according to an embodiment of the present invention.

Figure 4 is a schematic diagram showing a slaked lime input device according to another embodiment of the present invention.

5 and 6 are a longitudinal sectional view and a plan view showing a basic ice of the slaked lime slurry filtration tank which can be preferably used in the slaked lime injecting device according to the present invention shown in FIG.

Figure 7 is a schematic diagram showing the lime slurry slurry filtration tank of the slaked lime input device according to another embodiment of the present invention.

-Explanation of symbols for the main parts in the drawings-

1, 1 ': slaked lime input device according to the present invention

1a: slaked lime slurry filtration tank 1b: water quality stabilizer

2: body 3: bulkhead

4: axis of rotation 4a: impeller

5: primary filter 6: secondary filter

7: Water purification introduction pipe 7a, 207a: float valve

8: Slaked lime inlet 9, 9a: drain

10: Initiation Well 11: Flowmeter

20: Mixing Paper 21: Mixing Machine

30: flocculator 31: flocculator

40: settler 41: settler

50: filter paper 51: residual chlorine measuring system

52: filter medium 60: water purification paper

61: level gauge 62: residual chlorine measuring system

70: chemical injector 71: chemical mixing tank

72: stirrer 73: water tank

74: water tank 75: pump

76: conveyor 77: dust collector

80: chlorine injector 81: ejector

82: evaporator 83: chlorine bath

84: neutralizing device 85: duct

90: control panel 100: water treatment device

101: Sludge or slurry pass-through funnel pipe

102: third filter

110: first thickener 111: second thickener

120: sludge reservoir 130: dehydrator

160: hydrated water collection tank 171: primary filtration tube

172: secondary filtration tube 181: reduction motor

182, 182a: base 190: mixed water of purified water and slaked lime

200: slaked lime melt input tank

The present invention relates to a slaked lime dosing device, and more particularly, by maintaining the proper alkalinity of the raw water can further improve the flocculation and sedimentation efficiency of the raw water and at the same time stabilize, while maintaining the proper alkalinity of the purified water This prevents the corrosion of the pipe due to the excessive amount of erosion free carbonic acid, reduces the amount of sludge, prevents the clouding phenomenon, prevents water drainage, and prevents the coloring phenomenon due to the increase in acidity. It relates to a slaked lime dosing device that can be improved to a level of spring water.

Generally, water treatment methods for obtaining drinking water include flocculation of suspended solids, solid-liquid separation, condensation of dissolved components, oxidation, biochemical denaturation, adsorption, ion exchange, and bacteria. And agglutination, filtration, sterilization against viruses, and neutralization of acids and alkalis. Such methods are purified by appropriate combinations according to various requirements such as water quality of raw water and water purification purposes.

1 and 2 are a flow chart illustrating a conventional general purified water and wastewater treatment process and a conventional general purified water treatment system diagram, which will be briefly described with reference to this for convenience of description.

First, the pressurized raw water in a non-drinkable state, taken from a water intake source such as a river or a reservoir, is embarked on the landing well 10 through the flow meter 11. The impingement well (10) stabilizes the water level fluctuations at the time of initiation in accommodating the pressurized raw water and controls the quantity of raw water, and evenly distributes the raw water to the facility following the impingement well (10) to determine and control the amount of raw water Purification work such as chemical injection, flocculation sedimentation and filtration can be performed accurately and easily.

The mixed paper 20 inputs various chemicals necessary for water purification to the raw water introduced from the landing well 10 through the chemical injector 70 and rapidly mixes them with the mixed water 21 to generate a micro floc. It is a facility, and as a dosing agent, as an flocculant for effectively coagulating and removing various suspended substances, for example, Poly Aluminum Hydroxy Chloride (PAC), Poly Aluminum Hydroxy Chloride Silicate (PACS), Aluminum based such as poly aluminum hydroxy silicate sulfate (PASS) and inorganic based such as iron based iron (sulfur, FeSO ₄ ㆍ 7H ₂ O) and ferric chloride (FeCl ₃ · 6H ₂ O), and Organic systems such as sodium alginate, and the like, and adjust the alkalinity lowered by the use of the flocculant and maintain an appropriate pH. The water works as an alkali agent for exhibited a cohesive effect sufficient lime (CaO 72%), water works soda ash (Na ₂ CO ₃ 99%) and caustic soda (NaOH 45% solution and a 20% solution) and the bird synthesized in the raw water Mention may be made of activated carbon powders for the removal of detergents, phenols and other organic substances.

The flocculant has two effects, one is to induce particle destabilization as an original function, and the other is to cause pH due to the hydration reaction. The input of slaked lime is essential in the treatment.

Examples of the chemical injector 70 may include a flocculant injector, an alkali injector, an activated carbon injector, and the like, which may be installed separately or in a mixed form (in the illustrated example, the chlorine injector is indicated by reference numeral 80). Separately as a city).

The example shown in FIG. 2 is for a solid medicine injector, wherein the solid medicine conveyed by the conveyor 76 is transferred to the medicine injector 70 and then introduced into the chemical mixing tank 71, and the conveyor 76 described above. The dust collector 77 is usually installed on the upper part. On the other hand, the purified water from the water supply source 74 is stored in the water supply tank 73 by the pump 75, and then introduced into the chemical mixing tank 71 described above and mixed with the injected chemicals. In the figure, reference numeral 72 is an agitator.

In general, a belt conveyor type, a cylinder type, a screw type, and the like are used for conveying a solid chemical, and an orifice type, a rota meta type, a rotary dipper type, a diaphragm type, and the like are used for conveying a liquid chemical.

The agglomeration paper 30 is to increase the sedimentation effect in the sedimentation basin 40 by agglomerating the microfloc particles produced in the mixed paper 20 by increasing the volume and weight. The bulkhead is installed so as not to form, and a plurality of agglomerators 31 are installed in order to generate a large and hard floc, and the speed of each agglomerator 31 is increased to increase the effect of the deceleration agglomeration, so that the floc is not destroyed. 40).

Sludge removal of the sedimentation basin 40 is carried out through the settling device 41 and the sludge collector (not shown). In general, the sedimentation basin 40 is a simple installation, easy to maintain and hydraulically stable horizontal flow type is widely used.

The filter paper 50 is a facility for removing suspended substances which have not been removed during pretreatment such as flocculation and sedimentation by physical and chemical action. As a filtration method, a rapid static filtration (attenuation filtration) method is widely used. As 52, filtration sand (25 cm thick) and / or anthracite (50 cm thick) are mainly used.

The purified water 60 is a facility for storing the purified water prior to the water supply, and ensures sufficient capacity and prevents the supply of purified water to the water supply area or the customer by the pump.

On the other hand, the disinfection of the raw water flowing into the water purification plant and the filtered purified water flowing out of the purification plant is performed by adding dilute chlorine water.

The pre-chlorine treatment not only prevents the growth of algae at the inlet of the mixed paper 20, but also inhibits the growth of microorganisms that inhibit aggregation and consequently prevents slime or mud from adhering to the media. In order to prevent the growth of anaerobic bacteria. On the other hand, the post-chlorine treatment is carried out in the purified water 60, for the sterilization of microorganisms that were not removed during the pre-chlorine treatment.

Referring to FIG. 2, chlorine stored in the chlorine tank (still) 83 is transferred to the chlorine injector 80, mixed with water supplied from the water supply source 74, and then supplied through the ejector 81. In general, pre-chlorine input is performed at the inlet of the rapid mixing paper 20, heavy chlorine input for maximizing the chlorine treatment effect is performed at the sedimentation basin 40, and post-chlorine input is performed at the purified water 60.

A duct 85 is installed above the chlorine injector 80, the ejector 81, and the chlorine tank 83 to collect evaporated harmful chlorine gas, and then neutralize it by the neutralizing device 84, and then discharge it into the atmosphere. Let's do it.

In the figure, reference numeral 61 is a water gauge, 62 is a residual chlorine meter, and 82 is an evaporator.

On the other hand, the control panel 90 by controlling the amount of the flocculant, alkali agent, chlorine, and the like and the timing of the addition, as described above, so that the water purification process can be carried out efficiently as a whole.

Subsequently, referring briefly to the wastewater treatment apparatus with reference again to FIG. 1, the primary concentration tank 110 and the secondary concentration tank 111 for concentrating the sludge sedimented from the sedimentation basin 40 and the concentrated supply supplied therefrom Dehydrator for sludge storage tank 120 for storing sludge and concentrated sludge conveyed from sludge storage tank 120 to dehydrate and cake to facilitate final disposal and transport of sludge to reduce volume and facilitate transportation and disposal. 130. Dewatered and caked sludge is landfilled in a landfill.

According to the above-mentioned chemical input device and method, especially alkali chemicals input device and method in the conventional general water treatment equipment as described above, calcined lime is injected in the form of liquid by using dilution water or through a hopper in the form of powder. Although the solubility of hydrated lime is very low at about 1.02% even in the case of liquid injection, it is very difficult to make a quantitative injection. There is a concern that this may occur, and in this case, there is a concern that the sedimentation basin will become cloudy, and as the amount of sludge generated increases, the sludge treatment cost increases, and if it does not meet the standard value, the pipeline includes an increase in acidity. Not only will it cause premature wear and loss of facilities, There is a problem that the coloring phenomenon (iron-green water, zinc-mold product, copper-blue product, etc.) is also high.

As a conventional method for solving the above-mentioned problems, NaOH (45% or 20%) is simply used for the purpose of increasing the OH ^- component in order to efficiently maintain the hydration reaction rate of the coagulant and obtain a good coagulation reaction effect. Is proposed, but since alkalinity basically uses OH ^- of divalent cation metal, this method violates the principle, which is incorrect because of low solubility of Ca (OH) ₂ . It is an input method, and there is a serious problem that an increase in Na ⁺ ions in purified water causes high blood pressure in locals to drink, and furthermore, NaOH is expensive and basically toxic.

In addition, LI (Langelier Index), which is represented by the following formula presented in the 「Maintenance Management」 section of the water supply facility standard, has a negative value indicating corrosiveness in almost all water purification plants in Korea that adopts the rapid filtration method.

LI = pH value of water-pHs

Where pHs = 8.313-log [Ca ⁺⁺ ]-log [A] -S)

In the above equation, pHs exceed 7.5 for most of Korea's water systems except for the upstream areas of the Nakdong and Bukhan rivers, and most of the raw water is 7.5> pH except when the algae thrives, so LI is almost negative.

In spite of this fact, there is no interest in increasing alkalinity in water purification treatment, but focuses only on lowering turbidity.

From the foregoing, it is possible to have an improved taste of tap water and to effectively inject a quantity of water, thereby avoiding the water drainage caused by the excessive injection of lime, and to prevent sludge increase and settling and downstream turbidity. There has been a need in the art for the development of an effective slaked lime dosing device, a slaked lime dosing method and a water purification treatment method which can prevent wear and loss of metals and concrete facilities by maintaining a weak acidity downstream of the chemical injection chamber of a water purification plant.

Therefore, the purpose of the present invention is to commercialize the continuous process and to enable the quantitative injection of slaked lime to maintain the proper alkalinity of the raw water to effectively improve the efficiency and stability of the coagulation and precipitation of the raw water, while maintaining the appropriate alkalinity of the purified water It can make a significant contribution to preventing corrosion of pipes and concrete structures caused by erosion free carbonic acid at the source and to improve the taste of tap water to the level of spring water. An object of the present invention is to provide a slaked lime injecting device that is applicable as an auxiliary facility in water purification equipment such as a complex.

The slaked lime injecting device according to the present invention for achieving the object of the present invention is made up of a body, a partition wall dividing the area except the lower portion of the body, and an introduction tube connected to the upper side of the body. A slaked lime slurry filtration tank for filtering the water in which the slaked lime is dissolved; The slaked lime slurry is connected to the filtration tank through a filter tube, and the inflow of the slaked lime is characterized in that it consists of a water quality stabilizer to increase the residence time of the dissolved water and to separate the undiluted solid liquid to reduce its turbidity.

Here, the slaked lime slurry filtration tank is preferably further provided with a slaked lime dissolved water input means for injecting the water in which the slaked lime is dissolved through the introduction pipe.

In addition, the slaked lime slurry filtration tank is further provided with a deceleration motor installed above the body, a rotating shaft extending therefrom, an impeller fixed to the lower end of the rotating shaft, a slaked lime injecting portion into which the slaked lime is added, and is introduced through the slaked lime injecting unit. It is also possible to stir the hydrated lime and water introduced through the introduction tube by the rotation of the impeller.

The calcined lime slurry filtration tank may further include a primary filter installed in an area defined by the body inner periphery of the other side facing the inlet pipe and the partition wall, and a secondary filter formed above the primary filter. It may be.

In addition, the water quality stabilizer has a buffering function of a aging tank in which calcium carbonate reacted with sludge and sludge or slurry remaining in the completely dissolved water of the slaked lime is separated into solid solution, and a flow load due to the increase and decrease of the incoming water. , It is preferable that the flow rate adjustment tank for feeding the reservoir by a predetermined amount is further connected.

In addition, it is preferable that at least one drain from which the sludge or the slurry settled is formed below the slaked lime slurry filtration tank, the water quality stabilizer, the aging tank, and the flow adjustment tank.

In addition, the slaked lime slurry filtration tank and the water quality stabilizer may be integral or separate.

In addition, the slaked lime slurry filtration tank may further include at least one slaked lime sludge or slurry passage preventing funnel pipe installed in the area defined by the body inner periphery of the other side facing the inlet pipe and the partition wall.

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

3 is a schematic view showing a slaked lime input device 1 according to an embodiment of the present invention.

As shown in FIG. 3, the slaked lime injector 1 according to an embodiment of the present invention includes a slaked lime dissolved water inlet 200, a slaked lime slurry filtration tank 1a, a water quality stabilizer 1b, and a water tank. It consists of 160.

First, in the cylindrical cylindrical slaked lime discharging tank 200 (in the illustrated example, a cylindrical or square cylindrical shape is possible, the shape of which is arbitrary in the present invention), the purified water (or raw water or process water) and slaked lime in advance. The mixed water (solid or liquid) is reacted and stirred through an impeller or the like to receive the water in which the slaked lime is dissolved, and from the slaked lime dissolved water introduction pipe 207 to the slaked lime slurry filtration tank 1a by operating the float valve 207a. Will be committed. Here, in the illustrated example, the cylindrical slaked lime lysate injection tank 200 has been described as an example, but the slaked lime slurry filtration tank through a pump or the like at a predetermined distance from the slaked lime dissolved water reacted and stirred in advance with purified water and slaked lime. It is also possible to inject to (1a), and if the slaked lime dissolved water which stirred the mixed water of purified water and slaked lime beforehand can be thrown into the slaked lime slurry filtration tank 1a, the form of slaked lime dissolved water input means is not limited.

Next, the above-described slaked lime slurry filtration tank 1a for filtering the slaked lime melt reacted by reacting with the slaked lime while solid-liquid separation will be described. The basic configuration is the body 2 (cylindrical or square cylindrical diagram in the illustrated example). And the shape thereof is arbitrary in the present invention), and a partition wall 3 having a hollow part and bisecting an area excluding the lower part of the body 2; A slaked lime dissolved water introduction pipe 207 communicating with an upper side of the body 2; The primary filter 5 which is horizontally installed in the area | region defined by the inner periphery of the main body 2 of the other side which opposes the said slaked lime melt water introduction pipe 207, and the said partition 3, and said primary It consists of the secondary filter 6 formed perpendicular to the filter 5 upper direction. Here, the primary and secondary filters (5) and (6) described above are optional in the present invention and do not need to be installed.

The position of the primary filter 5 is any other of the compartments other than the compartment in which the slaked lime melt introduction pipe 207 is located among the two compartments (not shown) which are bisected by the partition 3 above. It is installed at a position, preferably in the middle or lower portion thereof, the primary filter 5 serves to prevent the sludge or slurry from moving due to the addition of slaked lime, and various kinds suitable for achieving this purpose. Although it may be a filter, it may be preferable from the viewpoint of durability and maintenance that it is a disc-shaped or box-shaped sieve type filter, especially a metal sieve filter.

The position of the secondary filter 6 is above the primary filter 5 described above, and is preferably installed vertically slightly below the position of the calcined lime lysate introduction pipe 207. The filter 6 is composed of a microfilter and / or a nanofilter, and these filters themselves are well known and commercially available, so a detailed description thereof will be omitted.

Meanwhile, one or more drains 9 may be formed below the body 2 to discharge sludge or slurry to be precipitated, and a base 182 may be formed below the body 2. Can be installed.

Of course, the continuous process can be commercialized by providing the float valve 207a in the opening part of the said slaked lime melt water introduction pipe 207.

Therefore, after the mixed water of purified water and slaked lime is stirred in the slaked lime dissolved water input tank 200 in advance, water in which slaked lime is dissolved is introduced from the slaked lime dissolved water introduction pipe 207 by the operation of the float valve 7a, and then Slurry sludge or slurry cannot be moved upward by the filter 5, and only the water in which the slaked lime is completely dissolved by the secondary filter 6 is discharged through the (primary) filtration tube 171.

The shape of the (primary) filtration tube 171 is preferably one in which the end portion contacting the primary filter 6 has a large area and the cross-sectional area is reduced to the other end in terms of filtration efficiency, but the shape thereof is limited. It is not.

Subsequently, in the substantially cylindrical water quality stabilizer 1b, the residence time of the dissolved water of the slaked lime flowing through the (primary) filtration tube 171 is increased to increase the turbidity of about 10 NTU (Nephelometric Turbidity Units). It serves to reduce the spillage. That is, in the water quality stabilizer (1b) described above, the turbidity of the water in which the slaked lime is dissolved is effectively and remarkably improved by using a conventional mixing or precipitation process, increasing the stagnation and residence time, and separating the undiluted solid liquid. It can be reduced. Since the water stabilizer 1b is known and commercially available, further description thereof will be omitted.

In addition, the secondary filtration tube 172 is connected to one side of the water quality stabilizer (1b) facing the primary filtration tube 171 is connected to the reservoir 160.

Here, the water quality stabilizer (1b) has a flow rate according to the sensitization tank (not shown) or the flow of water flowing into the hydrated lime to separate the calcium carbonate reacted with sludge or slurry into solid solution remaining in the water in which hydrated lime is completely dissolved By the buffering effect of the load, by a predetermined amount to be transferred to the reservoir 160 may be included a flow rate adjustment tank to maintain a proper environment for water treatment using the slaked lime injecting device according to the present invention. Such a aging tank or a flow adjustment tank is also known and commercially available, so further description thereof will be omitted.

One or more drains 9a through which sludge or slurry that is deposited may be discharged may also be provided in the lower portion of the water stabilizer 1b, and the water stabilizer 1b may be located on the base 182a. have.

In the illustrated example, the slaked lime slurry filtration tank 1a and the water quality stabilizer 1b are formed separately, but the slaked lime slurry filtration tank 1a and the water quality stabilizer 1b may be integrally formed.

Therefore, the slaked lime mixed water which has passed through the water quality stabilizer 1b can secure the completely dissolved state of slaked lime.

4 is a schematic view showing a slaked lime input device 1 'according to another embodiment of the present invention. 5 and 6 are longitudinal sectional views and a plan view, respectively, showing a basic outline of the slaked lime slurry filtration tank 1a which can be preferably used in the slaked lime injecting apparatus 1 'according to the present invention shown in FIG. 4, for convenience of explanation. Let's explain together. Here, in the slaked lime injecting device 1 ′ according to another embodiment of the present invention, the slaked lime slurry filtration tank 1a is fixed to the reduction shaft 181 and the rotating shaft 4 extending therefrom and the lower end of the impeller 4a. It differs from the slaked lime injecting apparatus 1 shown in FIG. 3 by the point provided with the stirring means which consists of a), and a separate slaked lime melt injecting tank.

That is, the slaked lime injecting apparatus 1 ′ according to another embodiment of the present invention includes a slaked lime inlet stirring tank combined slaked lime slurry filtration tank 1a, a water quality stabilizer 1b, and a water storage tank 160.

First, the above-described slaked lime slurry filtration tank combined use of the slaked lime added stirring tank 1a, the basic configuration is the body 2 (cylindrical or square cylindrical shape in the illustrated example is possible, the shape is arbitrary in the present invention And a partition wall 3 having a hollow part and bisecting an area excluding the lower part of the body 2; A reduction motor 181 installed above the body 2, a rotating shaft 4 extending therefrom, and an impeller 4a fixed to a lower end of the rotating shaft; A purified water introduction pipe 7 communicating with an upper side of the body 2; A primary filter 5 installed horizontally in an area defined by the inner periphery of the body 2 on the other side facing the water purification introduction pipe 7 and the partition wall 3, and the primary filter ( 5) It consists of the secondary filter 6 formed perpendicularly upwards. Here, as described above, the primary and secondary filters 5, 6 are optional in the present invention and may not be installed.

The position, type, and function of the primary and secondary filters 5 and 6 are the same as described above, and thus, further description thereof will be omitted.

Meanwhile, quicklime or slaked lime introduction part 8 may be formed above the body 2, and a drain 9 may be formed below the base 2, and a base 182 may be installed below the body 2. Can be.

Moreover, by providing the float valve 7a in the opening part of the above-mentioned purified water introduction pipe 7, a continuous process can be commercialized.

Therefore, the mixed water 190 and purified water introduced by the operation of the float valve 7a from the purified water introduction pipe 7 are thoroughly stirred by the rotation of the impeller 4a, and then the primary filter 5 As a result, the slaked lime sludge or the slurry is not moved upward, and only the water in which the slaked lime is completely dissolved by the secondary filter 6 is discharged through the (primary) filter tube 171.

As described above, the shape of the (primary) filtration tube 171 is preferably, in terms of filtration efficiency, such that one end portion in contact with the primary filter 6 has a large area and a cross-sectional area is reduced to the other end. However, the shape is not limited.

Since the substantially cylindrical water quality stabilizer 1b is substantially the same as the description of FIG. 3, a detailed description thereof will be omitted.

Of course, as described above, the water quality stabilization tank (1b) is introduced into a aging tank (not shown) in which calcium carbonate reacted with sludge or sludge or slurry that remains in the water in which hydrated lime is completely dissolved is separated into solid solution. It may include a flow adjustment tank to buffer the flow load according to the increase and decrease of water, and to maintain a proper environment in the purified water treatment using the slaked lime input device according to the present invention by transferring to the reservoir tank by a predetermined amount.

In the illustrated example, the slaked lime slurry filtration tank for combined use of the slaked lime input stirring tank and the water stabilizer 1b for the water quality stabilizer 1b are separated from each other. ) And the water quality stabilizer 1b can also be prepared.

Therefore, the slaked lime mixed water which has passed through the water quality stabilizer 1b can secure the completely dissolved state of slaked lime.

FIG. 7 is a schematic view showing the slaked lime slurry filtration tank 1a of the slaked lime input device according to another embodiment of the present invention, the other side of which the slaked lime slurry filtration tank 1a according to the present embodiment is opposed to the purified water introduction pipe 7. At least one slaked lime sludge or slurry passage preventing funnel tube 101 installed in an area defined by the inner periphery of the body 2 and the partition 3, and the slaked lime sludge or slurry passing prevention funnel tube 101 described above. It is substantially the same as that of FIG. 4 except that the 3rd order filter 102 installed in the upper part of a neck part is comprised, and the difference is demonstrated.

Here, in the illustrated example, only one sludge or slurry passage prevention funnel tube 101 is formed, but in some cases, 2-3 may be installed, and in the present invention, the number of funnel tubes 101 is limited. no.

The location of the slaked lime sludge or slurry passage preventing funnel tube 101 is a compartment other than the compartment in which the purified water introduction pipe 7 is located among the two compartments (not shown) which are bisected by the partition wall 3. Arranged at any position, preferably about the middle portion of, the primary filter (5) serves to prevent the movement of sludge or slurry due to the addition of slaked lime. That is, in the narrow neck portion of the lower side of the lime-lime sludge or slurry passage preventing funnel tube 101 by Bernoulli theorem, the flow rate of the water (including the lime-lime sludge or slurry) in which the rising slaked lime is dissolved is increased and the upper portion of the neck portion is increased. As the width gradually increases, the flow velocity decreases, so that the relatively large slaked lime sludge or slurry does not move upward but falls to the lower side and is agitated again, so that only the dissolved slaked lime can pass. The material of the slaked lime sludge or the slurry passage prevention funnel tube 101 may be made of metal in terms of durability and maintenance, but the material is not limited thereto.

The position of the secondary filter 6 is above the hydrated lime sludge or slurry passage preventing funnel tube 101 and is preferably installed vertically slightly below the position of the purified water introduction tube 7. One secondary filter 6 is composed of a microfilter and / or nanofilter (nanofilter), these filters themselves are known, commercially available and will not be described in detail.

Therefore, the mixed water 200 of purified water and slaked lime introduced by the operation of the float valve 7a from the purified water introduction pipe 7 is thoroughly stirred by the rotation of the impeller 4a, and then prevents the passage of slaked lime sludge or slurry. The funnel tube 101 and the primary and tertiary filters 5 and 102 are prevented from moving upward in the slaked lime sludge or slurry, and again, only the water in which the slaked lime is completely dissolved by the secondary filter 6 is filtered. Discharged through the reservoir 160).

Further, in the illustrated example, the slaked lime slurry filtration tank 1a 'includes a reduction motor 181, an agitating means composed of the above-described rotary shaft 4 extending therefrom and an impeller 4a fixed to the lower end thereof, Although a structure having a separate slaked lime input stirring tank is shown, the same applies to a slaked lime slurry filtration tank having a structure not having such a separate stirring means as in the structure of FIG. 3.

As described above, according to the slaked lime injecting device according to the present invention, it is possible to quantitatively inject the slaked lime to maintain the proper alkalinity of raw water, thereby effectively improving the efficiency and stability of the flocculation and sedimentation of raw water, Water can be avoided, and sludge increase and sedimentation basin and downstream turbidity can be prevented, and by maintaining proper alkalinity of purified water, it is possible to prevent corrosion of metal pipes and concrete structures due to erosion free carbonic acid. At the same time, the taste of tap water can be improved to the level of spring water.

Although the present invention has been described in detail, a person of ordinary skill in the art may make various changes and modifications from the present invention without departing from the scope of the present invention, but this is also within the scope of the present invention. You must understand.

Claims (8)

A slaked lime slurry filtration tank consisting of a body, a partition wall bisecting an area excluding the lower part of the body, and an introduction tube communicating with an upper side of the body and filtering the water in which slaked lime is dissolved; The slaked lime slurry filtration tank is connected to the slurry through a filter tube, the slaked lime flowing in the device is characterized in that it is made of a water quality stabilizer to increase the residence time of the dissolved water and to separate the solid liquid that is not separated to reduce the turbidity . The method of claim 1, The slaked lime slurry filtration tank further comprises a slaked lime dissolved water injecting means for injecting water in which the slaked lime is dissolved through the introduction pipe. The method of claim 1, The calcined lime slurry filtration tank further includes a deceleration motor installed above the body, a rotating shaft extending therefrom, an impeller fixed to the lower end of the rotating shaft, and a calcined lime injecting portion into which the slaked lime is added. And a slaked lime injector, characterized in that the water introduced through the introduction pipe is stirred by the rotation of the impeller. The method of claim 1, The calcined lime slurry filtration tank further includes a primary filter installed in an area defined by the body inner circumference of the other side facing the inlet pipe and the partition wall, and a secondary filter formed above the primary filter. Slaked lime feeding device. The method of claim 1, The water quality stabilization tank has a aging tank in which calcium carbonate reacted with sludge or sludge or sludge remaining in the completely dissolved water of the slaked lime is separated into solid solution, and buffers a flow load due to the increase and decrease of the incoming water. A slaked lime input device, characterized in that the flow rate adjustment tank to be transferred to the reservoir each time. The method of claim 5, The slaked lime filtration tank, the water quality stabilizer, the aging tank, the slaked lime input device, characterized in that at least one drain is formed which can be discharged sludge or slurry is formed. The method of claim 1, The slaked lime slurry filtration tank and the water quality stabilizer is a slaked lime input device, characterized in that the integral or separate type. The method of claim 1, The calcined lime slurry filtration tank further includes a calcined lime injector further comprising at least one slaked lime sludge or slurry passage preventing funnel tube installed in an area defined by the body inner periphery of the other side facing the inlet pipe and the partition wall. .

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