KR20150091929A - Improved ability to remove fluoride method of producing a coagulant for water treatment and its preparation method of manufacturing a coagulant for water treatment - Google Patents

Improved ability to remove fluoride method of producing a coagulant for water treatment and its preparation method of manufacturing a coagulant for water treatment Download PDF

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KR20150091929A
KR20150091929A KR1020140012755A KR20140012755A KR20150091929A KR 20150091929 A KR20150091929 A KR 20150091929A KR 1020140012755 A KR1020140012755 A KR 1020140012755A KR 20140012755 A KR20140012755 A KR 20140012755A KR 20150091929 A KR20150091929 A KR 20150091929A
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aluminum
weight
chloride
water treatment
parts
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KR1020140012755A
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염복철
박민자
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삼구화학공업 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities

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  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The present invention relates to a method for producing a flocculant for water treatment having improved fluorine removal capability and a coagulant for water treatment prepared by the method, and a method for producing aluminum chloride by reacting aluminum hydroxide with hydrochloric acid at a predetermined ratio, The present invention has been made in order to improve the fluorine removal ability by producing aluminum chloride as a water treatment coagulant by mixing and reacting at a predetermined ratio. (A) preparing a primary mixture at a ratio of 220 to 310 parts by weight of hydrochloric acid (HCl) and 12 to 92.5 parts by weight of water to 100 parts by weight of aluminum hydroxide (Al (OH) 3 ); (b) preparing aluminum chloride by reacting the mixed mixture in the step (a) under a predetermined temperature condition; (c) 2 to 25 parts by weight and 4 to 145 parts by weight, based on 100 parts by weight of aluminum hydroxide (Al (OH) 3 ) into which aluminum sulfate and water (H 2 O) Forming a second mixture at a ratio of parts by weight; And (d) allowing the reaction to be carried out while stirring the secondary mixture mixed in the step (c) under a predetermined temperature condition to complete the bonding of the sulfate ion to the aluminum chloride, thereby producing the aluminum chloride in a stabilized state Step.

Description

TECHNICAL FIELD [0001] The present invention relates to a flocculant for water treatment having improved fluorine removal ability and a coagulant for water treatment prepared by the method,

The present invention relates to a coagulant for water treatment, and more particularly, to a method for producing a coagulant for water treatment having improved fluorine removal capability for reducing fluorine content, which is a major impurity in wastewater discharged from an electronic component factory, To a flocculant for water treatment improved in fluorine removal ability.

In general, the role of coagulants belonging to physical and chemical treatments in water treatment is very important. Al 2 (SO 4 ) 3 · 16H 2 O or Al 2 (SO 4 ) 3 · 18H 2 O, which is a first-generation coagulant, Alum (alum sulfate), was mainly used as a coagulant, And there is a disadvantage in that the coagulation effect is low and the alkalinity and the pH decrease greatly after the treatment.

 Recently, poly aluminum sulfate (PAS) has been widely used as a second generation coagulant (PAC), which overcomes the disadvantages of the first generation coagulant as described above. A coagulant such as poly aluminum sulfate silicate (PASS) or poly alumium chloride silicate (PACS) is used.

On the other hand, the second-generation coagulant as described above has a wide range of cohesion with respect to pH and turbidity, has excellent cohesive power, and does not consume much alkalinity, unlike the first-generation coagulant. It is advantageous that the amount of the coagulant used is small.

However, the above-mentioned second-generation coagulants have a problem in that the basicity of the second-generation coagulants is sufficiently high that a pH adjusting agent (alkaline agent) is unnecessary, while the product precipitates and the degree of degradation may occur. As a solution to this problem, Korean Patent Laid-Open Publication No. 1998-0009116 (published on April 30, 1998) discloses an invention for polyaluminum chloride chloride.

Although the known polychlorinated aluminum chloride as described above has an advantage that the basicity thereof is sufficiently high, there is a problem that the stability of the waste water containing fluorine and phosphorus is reduced, and the fluorine treatment efficiency is poor .

In addition, since the above-described poly (aluminum chloride) is manufactured under severe conditions under a very high pressure of about 12 atm in the production process, mass production is not easy and unsafe due to problems of equipment.

On the other hand, in recent years, the use of fluorine as a surface treatment or cleaning agent for semiconductors has been gradually increasing, and the importance of countermeasures against environmental pollution caused by fluorine has been increasing. Especially in the environmental industry, steel industry, semiconductor industry, hydrofluoric acid manufacturing industry and metal processing industry, there is an increasing demand for development of coagulant for effective fluorine treatment.

1. Korean Patent Publication No. 1999-0046414 (published on July 5, 1999) 2. Korean Patent Publication No. 1999-030427 (published on April 26, 1999) 3. Korean Patent Publication No. 2010-0021259 (Feb. 24, 2010)

The present invention has been devised to solve all the problems of the prior art, and it is an object of the present invention to provide a process for producing aluminum chloride by reacting aluminum hydroxide and hydrochloric acid at a constant ratio, The present invention provides a method for producing a coagulant for water treatment having improved fluorine removal capability for further improving the fluorine removal capability and a coagulant for water treatment manufactured by the method.

Another object of the present invention is to provide a process for producing aluminum chloride as a water treatment coagulant by reacting aluminum hydroxide with hydrochloric acid at a predetermined ratio to produce aluminum chloride, So as to prevent economic loss.

In addition, the technology of the present invention increases the treatment efficiency by producing aluminum chloride by reacting aluminum hydroxide with hydrochloric acid at a certain ratio, and then aluminum sulfate as a water treatment coagulant by mixing and reacting aluminum sulfate at a predetermined ratio under proper conditions, Thereby reducing the amount of the coagulant used and reducing the treatment cost.

Further, according to the present invention, aluminum hydroxide and hydrochloric acid are reacted at a certain ratio to produce aluminum chloride, and aluminum sulfate is mixed and reacted at a predetermined ratio under appropriate conditions to produce aluminum chloride as a water treatment coagulant, It is an object of the present invention to solve both of the problems of eliminating phosphorus in waste water treatment and increasing the fluorine removal rate of fluorine wastewater containing a large amount of fluorine.

The present invention configured to achieve the above-described object is as follows. That is, the method for producing a coagulant for water treatment having improved fluorine removal capability according to the present invention is characterized in that coagulation of phosphorus and fluorine, which are degradable, contained in sewage or waste water and wastewater is carried out by chemical treatment to form a flocculant, (A) preparing a primary mixture at a ratio of 220 to 310 parts by weight of hydrochloric acid (HCl) and 12 to 92.5 parts by weight of water relative to 100 parts by weight of aluminum hydroxide (Al (OH) 3 ); (b) preparing aluminum chloride by reacting the mixed mixture in the step (a) under a predetermined temperature condition; (c) 2 to 25 parts by weight and 4 to 145 parts by weight, based on 100 parts by weight of aluminum hydroxide (Al (OH) 3 ) into which aluminum sulfate and water (H 2 O) Forming a second mixture at a ratio of parts by weight; And (d) allowing the reaction to be carried out while stirring the secondary mixture mixed in the step (c) under a predetermined temperature condition to complete the bonding of the sulfate ion to the aluminum chloride, thereby producing the aluminum chloride in a stabilized state Step.

In step (a) of the composition according to the present invention as described above, aluminum hydroxide (Al (OH) 3 ) can be used in which the concentration of aluminum oxide (Al 2 O 3 ) is 50 to 65% ), Hydrochloric acid (HCl) having a concentration of 30 to 35% can be used.

In step (a) of the composition according to the present invention, aluminum hydroxide (Al (OH) 3 ) may be used in place of another compound in the aluminum salt state. In step (a), hydrochloric acid (HCl) in the step (a) may be used in combination with another compound in the state of the 2A group chloride, 3B group chloride or 4B group chloride in the Periodic Table of the Elements.

In addition, the reaction temperature condition of the first mixture in the step (b) of the composition according to the present invention may be such that the reaction is carried out at a temperature of 90 to 160 캜 for 4 to 12 hours, The aluminum chloride can be produced with a concentration of aluminum oxide (Al 2 O 3 ) of 7 to 21%.

Meanwhile, in the step (c) of the composition according to the present invention as described above, the aluminum sulfate has a concentration of aluminum oxide (Al 2 O 3 ) of 5 to 17% and a concentration of sulfate ions (SO 4 2- ) 50% can be used.

In step (c) of the present invention, the aluminum sulfate may be used in place of other compounds in the sulfate ion salt state. In step (c), the aluminum sulfate may be used in the form of 1A, 2A, And 4B group element compounds, and the like.

In the step (d) of the composition according to the present invention, it is preferable that the secondary mixture can be stabilized while stirring at a stirring speed of 35 to 90 rpm for 0.5 to 4 hours under a temperature condition of 30 to 90 캜 .

Aluminum Chloride (AC) in a stabilized state through the above-described step (d) has a concentration of aluminum oxide (Al 2 O 3 ) of 7 to 15%, a concentration of sulfuric acid ion of 0.001 to 5.0% and a basicity of 0.1 To 10.0% is satisfied.

The flocculant for water treatment, which is another feature of the present invention, is a flocculant for water treatment which flocculates and coagulates the poorly decomposable phosphorus and fluorine contained in sewage or waste water and wastewater through a chemical treatment to form a flocculant. (HCl), and 12 to 92.5 parts by weight of water, based on 100 parts by weight of aluminum (Al (OH) 3 ), and aluminum chloride is produced through a reaction at a constant temperature, A secondary mixture is prepared in a proportion of 2 to 25 parts by weight and 4 to 145 parts by weight based on 100 parts by weight of aluminum hydroxide (Al (OH) 3 ) into which aluminum sulfate and water (H 2 O) And the reaction is carried out under a constant temperature condition to complete the bonding of the sulfate ion to the aluminum chloride through the reaction to produce aluminum chloride in a stabilized state.

In the structure according to the present invention as described above, aluminum hydroxide (Al (OH) 3 ) can be used in which the concentration of aluminum oxide (Al 2 O 3 ) is 50 to 65%, hydrochloric acid (HCl) 35% can be used.

In the composition according to the present invention, aluminum hydroxide (Al (OH) 3 ) can be used in place of another compound in an aluminum salt state, and hydrochloric acid (HCl) can be used in place of another compound in a chloride state. In addition, hydrochloric acid (HCl) may be used in combination with other compounds in the 2A-family chloride or 3B-family chloride or 4B-family chloride state on the Periodic Table of the Elements.

In addition, in the composition according to the present invention, the reaction temperature condition of the primary mixture may be such that the reaction is carried out at a temperature of 90 to 160 ° C for 4 to 12 hours, and the aluminum chloride produced is aluminum oxide (Al 2 O 3 ) And a concentration of 7 to 21%.

On the other hand, in the constitution according to the present invention, the aluminum sulfate may have a concentration of aluminum oxide (Al 2 O 3 ) of 5 to 17% and a concentration of sulfate ion (SO 4 2 - ) of 10 to 50%.

In the composition according to the present invention, the aluminum sulfate may be used in place of other compounds in the form of sulfate ion salt. In order to ensure the stability of the product, the aluminum sulfate is preferably selected from the group consisting of elemental compounds 1A, 2A, 3B and 4B A chlorine compound, and the like.

In the composition according to the present invention, the secondary mixture is preferably stabilized while stirring at a stirring speed of 35 to 90 rpm under a temperature condition of 30 to 90 캜 for 0.5 to 4 hours.

Aluminum Chloride (AC) in a stabilized state according to the present invention has a concentration of aluminum oxide (Al 2 O 3 ) of 7 to 15%, a concentration of sulfuric acid ion of 0.001 to 5.0% and a basicity of 0.1 to 10.0% Is satisfied.

According to the present invention, aluminum hydroxide and hydrochloric acid are reacted at a certain ratio to produce aluminum chloride, and then aluminum sulfate is mixed and reacted at a predetermined ratio under appropriate conditions to produce aluminum chloride as a water treatment coagulant, thereby further improving the fluorine removing ability There is a number.

In addition, the aluminum chloride of the present invention can improve the size of flocs to prevent economic loss, as well as increase the treatment efficiency, thereby reducing the amount of the flocculant used, thereby reducing the treatment cost.

In addition, the aluminum chloride of the present invention overcomes the limitations of conventional flocculants and improves the removal rate of phosphorus in treatment of wastewater and the removal of fluorine contained in fluoride wastewater. It can be solved at the same time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a manufacturing process of a flocculant for water treatment with improved fluorine removal capability according to the present invention. FIG.

Hereinafter, a method for manufacturing a coagulant for water treatment having improved fluorine removal capability according to a preferred embodiment of the present invention and a coagulant for water treatment manufactured by the method will be described in detail.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a method for producing a flocculant for water treatment with improved fluorine removal capability according to the present invention. FIG.

First, the technology of the flocculant for water treatment according to the present invention, which has improved fluorine removing ability, is a method for improving the performance of the existing product by maintaining the proper content of aluminum and sulfate ions, Inorganic coagulant.

The aluminum chloride salt inorganic coagulant according to the present invention may be prepared by reacting aluminum hydroxide with hydrochloric acid at a predetermined ratio to produce aluminum chloride, and then subjecting the aluminum sulfate to a mixed reaction at a predetermined ratio under appropriate conditions to form a chloride Aluminum.

On the other hand, the above-described aluminum chloride has a disadvantage in that the existing polychlorinated aluminum is contained in the wastewater and the ability of removing fluoride such as fluorine is closely related to the concentration of aluminum, so that a high concentration of aluminum or a large amount of coagulant should be added Thereby improving the fluorine removal ability and improving the floc size, thereby preventing economic loss and increasing the treatment efficiency, thereby reducing the amount of the flocculant used, thereby reducing the treatment cost.

In addition, the inorganic coagulant in the aluminum chloride salt state according to the present invention can achieve high efficiency by supplying a small amount of water in the raw water maintaining the high alkalinity from December to April when the water is being treated in the sewage treatment.

As shown in FIG. 1, aluminum chloride (Al (OH) 3 ), hydrochloric acid (HCl) and water are mixed at a predetermined ratio to prepare a primary aluminum chloride (B) a step (c) of producing aluminum chloride by reacting the primary mixture mixed in the step (a) under a predetermined temperature condition (S110), (c) a step (S120), (d) a step of mixing the aluminum chloride with aluminum sulfate and water (H 2 O) at a predetermined ratio to form a secondary mixture, (d) a step (c) And a step (S130) of forming an aluminum chloride (Aluminum Chloride (AC)) by stabilizing the aluminum chloride so that the reaction can be performed while stirring the aluminum chloride under stirring.

In other words, the process for producing aluminum chloride, which is an inorganic coagulant having improved fluorine removal capability according to the present invention, is firstly carried out by mixing aluminum hydroxide (Al (OH) 3 ), hydrochloric acid (HCl) (S100), and then the primary mixture is reacted under a constant temperature condition to produce aluminum chloride (S110).

Next, the aluminum chloride produced as described above is mixed with aluminum sulfate and water (H 2 O) at a certain ratio to form a secondary mixture (S120), and then the mixed secondary mixture is stirred at a predetermined temperature (Aluminum Chloride: AC) having improved fluorine removal ability, which is to be prepared in the present invention, is prepared by reacting the aluminum chloride with an alkali.

On the other hand, the first mixture of aluminum hydroxide in the composition process of step (a) from the configuration according to the invention the process as described above (Al (OH) 3) and acid aluminum oxide to (HCl) and the mole fraction of water (Al 2 O 3 220 to 310 parts by weight of hydrochloric acid (HCl) having a concentration of 30 to 35% and 12 to 92.5 parts by weight of water are mixed with 100 parts by weight of aluminum hydroxide (Al (OH) 3 ) having a concentration of 50 to 65% The primary mixture is formulated.

In the process of forming the secondary mixture of the step (c) in the composition according to the present invention, the aluminum sulfate produced in the step (b) is mixed with the aluminum sulfate and water (H 2 O) aluminum sulphate and water, but the composition ratio of aluminum hydroxide of step (a) the process of (H 2 O) (Al ( OH) 3) the concentration is 5-17% of aluminum oxide (Al 2 O 3) based on 100 parts by weight, and 2 to 25 parts by weight of aluminum sulfate having a concentration of sulfate ions (SO 4 2- ) of 10 to 50% and 4 to 145 parts by weight of water (H 2 O) are mixed.

The constitution of the method for producing aluminum chloride with improved fluorine removal capability according to the present invention will be described in detail as follows. First, in step (a) process of aluminum hydroxide (Al (OH) 3) and hydrochloric acid (HCl) and water, the primary mixture composition process (S100) according to (H 2 O) that make up the present invention, such steps (a 1), the aluminum hydroxide (Al (OH) 3 ), hydrochloric acid (HCl), and water (H 2 O) are mixed at a predetermined ratio to form a first mixture To be established.

On the other hand, the concentration of step (a) process (S100) aluminum hydroxide (Al (OH) 3) and hydrochloric acid (HCl) and water ratio of aluminum oxide (Al 2 O 3) a (H 2 O) in the above-described 50-65% of aluminum hydroxide (Al (OH) 3) mixed at a concentration of 30-35% with respect to 100 parts by weight of hydrochloric acid (HCl) 220~310 parts by weight ratio of water (H 2 O) 12~92.5 parts by weight of .

In addition, aluminum hydroxide (Al (OH) 3 ) may be used in place of another compound in the aluminum salt state in the process of preparing the primary mixture of the step (a) (S100) according to the present invention as described above.

In addition, in the process of forming the primary mixture of the step (a) (S100) constituting the present invention as described above, hydrochloric acid (HCl) may be used in place of other compounds in the chloride state.

In step (a) of the present invention, hydrochloric acid (HCl) can be used in combination with hydrochloric acid (HCl) and other compounds in the 2A group chloride, 3B group chloride or 4B group chloride on the periodic table have.

The step (b) of the present invention comprises a step (S110) of reacting the primary mixture formed in the step (a) (S100) under a predetermined temperature condition (S110) The aluminum chloride is produced by reacting the primary mixture mixed in the step (a) (S100) at a predetermined temperature condition as shown in FIG.

The reaction condition in the step (b) (S110) as described above is that the primary mixture mixed in the step (a) (S100) is reacted for 4 to 12 hours under the temperature condition of 90 to 160 캜 to form aluminum chloride . The aluminum chloride produced through the reaction of step (S110) in step (b) is aluminum chloride having a concentration of aluminum oxide (Al 2 O 3 ) of 7 to 21%.

On the other hand, in the aluminum chloride prepared through the reaction process of the above-described step (b) (S110), aluminum chloride, which has been used for removing fluorine in the related art, It is an unstabilized aluminum chloride as a simple mixture due to the mixing of chlorides.

Therefore, the unstable aluminum chloride produced through the reaction process of the step (b) (S110) as described above can not produce high quality aluminum chloride because the treatment efficiency is remarkably decreased, and even if the production is made, It is not possible to maintain economic efficiency.

Therefore, in order to stabilize the unstable aluminum chloride produced through the reaction process of the step (b) (S110) as described above, the bonding of the sulfate ion (SO 4 2- ) to the aluminum chloride is completed to stabilize the aluminum chloride There is a need to improve the treatment efficiency and maintain a constant quality. The process after step (b) (S110) is a process for stabilizing aluminum chloride.

Next, the step (c) constituting the present invention is a step (S120) for binding sulfuric acid ions (SO 4 2- ) to the unstable aluminum chloride produced in the step (b) In step (c), as shown in FIG. 1, the aluminum chloride prepared in step (b) (S110) is mixed with aluminum sulfate and water (H 2 O) at a predetermined ratio to form a second mixture do.

In other words, the secondary mixture forming process in the step (c) (S120) as described above is performed by adding aluminum sulphate and water (H 2 O) to the unstable aluminum chloride produced in the step (b) (Al 2 O 3 ) is added to 100 parts by weight of aluminum hydroxide (Al (OH) 3 ) in the step (a), and the ratio of aluminum sulfate to water (H 2 O) 2 to 25 parts by weight of aluminum sulfate having a concentration of 5 to 17% and a concentration of sulfuric acid ions (SO 4 2- ) of 10 to 50% and 4 to 145 parts by weight of water (H 2 O) .

That is, in the step (c) (S120), the concentration of aluminum oxide (Al 2 O 3 ) is 5 to 17% in the unstable aluminum chloride prepared in the step (b) a sulfate ion (SO 4 2 -), aluminum sulphate and water (H 2 O) and aluminum hydroxide (Al (OH) 3) for each concentration is 10 to 50% of 2-25 parts by weight for 100 parts by weight and 4 to And 145 parts by weight, respectively, to prepare a secondary mixture.

On the other hand, the aluminum sulfate in step (c) (S120) may be used in place of other compounds in the sulfate ion salt state.

In order to ensure the stability of the product, the aluminum sulfate in the step (c) (S120) may be replaced with a compound consisting of chlorine compounds selected from the group consisting of 1A, 2A, 3B and 4B elemental compounds have.

Next, aluminum sulfate and water (H 2 O) are mixed with the unstable aluminum chloride produced in the step (b) 110 at a predetermined ratio through the step (c) (S120) (B) in step (d), the secondary mixture is reacted with sulfuric acid ions (SO 4 2 ) in the unstable aluminum chloride prepared in step (b) - ) is completed.

In other words, the process for stabilizing an aluminum chloride, the secondary composition mix at a predetermined temperature and the reaction time for step (d) the process (S130) is aluminum sulphate and water (H 2 O) in the aluminum chloride, which constitutes the present invention (S130 ), And the step (d) (S130) is carried out by reacting the mixed mixture in the step (c) (S120) while stirring under a constant temperature condition as shown in FIG. 1, by completion of the combination of (SO 4 2-) it is manufactured of aluminum chloride in a stabilized state.

Meanwhile, in the step (d) (S130) as described above, the secondary mixture is reacted while stirring at a stirring speed of 35 to 90 rpm under a temperature condition of 30 to 80 캜 for 0.5 to 4 hours, SO 4 2- ) is completed and stabilized in aluminum chloride (Aluminum Chloride: AC).

Then, through the step (d) (S130) of the composition according to the present invention as described above, the reaction is carried out at a stirring speed of 35 to 90 rpm under a temperature condition of 30 to 80 캜 for 0.5 to 4 hours, The aluminum chloride (Aluminum Chloride: AC) in which the binding of the sulfate ion (SO 4 2- ) is completed and stabilized has a concentration of aluminum oxide (Al 2 O 3 ) of 7 to 15%, a basicity of 0.1 to 10% SO 4 2 - ) is 0.001 to 5.0%.

As described above, the aluminum fluoride (AC) improved in fluorine removal ability according to the present invention is prepared by mixing 100 parts by weight of aluminum hydroxide (Al (OH) 3 ) having a concentration of aluminum oxide (Al 2 O 3 ) (HCl) at a concentration of 30 to 35% and 12 to 92.5 parts by weight of water (H 2 O) to prepare an aluminum chloride by reaction under a constant temperature condition Next, aluminum sulfate and water (H 2 O) each having a concentration of aluminum oxide (Al 2 O 3 ) of 5 to 17% and a concentration of sulfate ion (SO 4 2 - ) of 10 to 50% aluminum hydroxide (Al (OH) 3) 100 parts by weight of the reaction by ion-sulfate in which aluminum chloride and stirred at a constant temperature conditions, the composition of the second mixture is 2-25 parts by weight and 4-145 parts by weight ratio of the (SO 4 2- ), the aluminum chloride, which is in a stabilized state, (Aluminum Chloride (AC)) to be manufactured in accordance with the present invention. This aluminum chloride is a product that not only degrades the treatment efficiency but also solves the problems caused by imbalance in quality and destabilization of the product.

Meanwhile, aluminum chloride which is finally stabilized through the above-described process is aluminum chloride (AC) which is the object of the present invention. Aluminum Chloride (AC) is an aluminum chloride (Aluminum Chloride) that improves the performance of existing products by maintaining a proper content of aluminum, basicity and sulfate ion (SO 4 2 - ), Inorganic coagulant.

As described above, aluminum chloride (Al (OH) 3 ), hydrochloric acid (HCl) and water (H 2 O) are reacted at a constant ratio to produce an unstable aluminum chloride. Then, aluminum sulfate is reacted at a constant ratio (Aluminum Chloride: AC) as a coagulant for water treatment, the existing polychlorinated aluminum is contained in the wastewater and the fluorine removal ability is closely related to the concentration of aluminum, so that a high concentration of aluminum or a large amount of coagulant And to compensate for the disadvantages.

Accordingly, the aluminum chloride (AC) according to the present invention manufactured as described above can improve the fluorine removal capability and improve the floc size, thereby preventing economic loss, The treatment efficiency is increased, and consequently, the amount of the flocculant used is reduced, thereby reducing the treatment cost.

[Example 1]

In Example 1, the aluminum (Al 2 O 3) of aluminum hydroxide (Al (OH) 3) the concentration is 58% of 250g and a concentration of 34% hydrochloric acid (HCl) 550g, and water (H 2 O) oxidation according to the invention And then reacted at a temperature of 160 ° C for 6 hours to prepare aluminum chloride having a concentration of aluminum oxide (Al 2 O 3 ) of 14.5%.

[Example 2]

In Example 2 according to the present invention, 5 g of aluminum sulfate having a concentration of aluminum oxide (Al 2 O 3 ) of 7.5% and a concentration of sulfate ion (SO 4 2- ) of 21% was added to the aluminum chloride prepared in Example 1, (H 2 O), and stabilized for 2 hours at a temperature of 80 ° C. to produce the desired aluminum chloride (AC).

In the reaction of Example 2 as described above, 1,000 kg of aluminum chloride having a concentration of 14.8% of aluminum oxide (Al 2 O 3 ) and 0.1% of sulfate ion (SO 4 2 - ) was produced. At this time, the basicity of the product, which is one of important manufacturing characteristics of aluminum chloride, was maintained at 0.8%.

[Example 3]

In Example 3 according to the present invention, 200 g of aluminum hydroxide (Al (OH) 3 ) having a concentration of aluminum oxide (Al 2 O 3 ) of 62%, 550 g of hydrochloric acid having a concentration of 33% and 80 ml of water (H 2 O) And then reacted for 8 hours at a temperature of 155 ° C to produce aluminum chloride having a concentration of aluminum oxide (Al 2 O 3 ) of 14.4%.

[Example 4]

In Example 4 according to the present invention, 50 g of aluminum sulfate having an aluminum oxide (Al 2 O 3 ) concentration of 17% and a sulfate ion (SO 4 2- ) concentration of 45% was added to the aluminum chloride prepared in Example 3, (H 2 O), and then stabilized at a temperature of 50 ° C for 2.5 hours to produce the desired aluminum chloride (AC).

Through the reaction of Example 4 as described above, 1,000 kg of aluminum chloride having a concentration of aluminum oxide (Al 2 O 3 ) of 12.3%, sulfate ions (SO 4 2 - ) of 2.0% and a basicity of 0.2% was produced.

[Example 5]

Example 5, aluminum (Al 2 O 3) the concentration is 55% of aluminum hydroxide (Al (OH) 3) 250g and a concentration of 35% hydrochloric acid (HCl) 620g, and water (H 2 O) of the oxidation according to the invention And then reacted at a temperature of 127 ° C for 10 hours to prepare aluminum chloride having a concentration of aluminum oxide (Al 2 O 3 ) of 15.3%.

[Example 6]

In Example 6 according to the present invention, 10 g of aluminum sulfate having a concentration of aluminum oxide (Al 2 O 3 ) of 16.5% and a concentration of sulfate ion (SO 4 2- ) of 42% was added to the aluminum chloride prepared in Example 5, (H 2 O), and stabilized at a temperature of 45 ° C. for 2 hours to prepare the desired aluminum chloride (AC).

In the reaction of Example 6 as described above, 1,000 kg of aluminum chloride having a concentration of aluminum oxide (Al 2 O 3 ) of 11.5%, sulfuric acid ion (SO 4 2 - ) of 1.1% and a basicity of 1.5% was produced.

On the other hand, aluminum chloride (AC) finally produced through Example 2, Example 4 and Example 6 in Examples 1 to 6 as described above is aluminum chloride (AC) as the object of the present invention. At this time, the components of aluminum chloride (AC) produced have the characteristics of 7-15% of aluminum oxide, 0.001-5.0% of sulfuric acid ion and 0.1-10.0% of basicity.

[Experimental Example 1]

Experimental results of aluminum chloride prepared in Example 2 (concentration of aluminum oxide of 14.8%, sulfate ion of 0.1% and basicity of 0.8%) were as follows. Poly (aluminum chloride) (PAC 17%) was used as a comparative test group.

1. Characteristics of raw water: A Final treatment of fluorine wastewater Aluminum chloride (AC) and polychlorinated aluminum (PAC) 500mg / l were uniformly injected into the raw water.

enemy Water temperature (℃) pH F - (mg / l) 22.4 10.02 22.6

The aluminum chloride solution (AC) PAC 17% Injection amount (ppm) 500 500 Water temperature (℃) 23.2 23.2 pH 6.78 6.81 F - (mg / l) 6.2 8.7 F - Removal rate (%) 72.6 61.5

2. Characteristics of raw water: A Final treatment of fluorine wastewater 500 mg / l of aluminum chloride (AC) and aluminum chloride (PAC) were uniformly added to the raw water.

enemy Water temperature (℃) pH F - (mg / l) 23.3 10.11 17.9

The aluminum chloride solution (AC) PAC 17% Injection amount (ppm) 500 500 Water temperature (℃) 23.7 23.6 pH 6.81 6.82 F - (mg / l) 5.7 7.9 F - Removal rate (%) 68.2 55.9

3. Characteristics of raw water: A Final treatment of fluorine wastewater 500 mg / l of aluminum chloride (AC) and polychlorinated aluminum (PAC) were uniformly added to the raw water.

enemy Water temperature (℃) pH F - (mg / l) 23.4 10.4 19.0

The aluminum chloride solution (AC) PAC 17% Injection amount (ppm) 500 500 Water temperature (℃) 23.7 23.6 pH 6.92 6.95 F - (mg / l) 5.5 8.1 F - Removal rate (%) 71.1 57.3

[Experimental Example 2]

The results of the experiment with aluminum chloride (concentration of aluminum oxide of 12.3%, basicity of 2.0% and sulfate of 0.2%) prepared in Example 4 are as follows.

4. Characteristics of raw water: B Final treatment of fluorine wastewater 700 mg / l of aluminum chloride (AC) and polychlorinated aluminum (PAC) were uniformly added to the raw water.

enemy Water temperature (℃) pH F - (mg / l) 22.1 10.3 190

The aluminum chloride solution (AC) PAC 17% Injection amount (ppm) 700 700 Water temperature (℃) 23.3 23.3 pH 6.72 6.72 F - (mg / l) 8.5 24.0 F - Removal rate (%) 95.5 87.4

5. Characteristics of raw water: B Final treatment of fluorine wastewater 700 mg / l of aluminum chloride (AC) and polychlorinated aluminum (PAC) were uniformly injected into the raw water.

enemy Water temperature (℃) pH F - (mg / l) 22.8 10.42 188

The aluminum chloride solution (AC) PAC 17% Injection amount (ppm) 700 700 Water temperature (℃) 23.1 23.3 pH 6.80 6.81 F - (mg / l) 7.2 17.4 F - Removal rate (%) 96.2 90.7

[Experimental Example 3]

Experimental results of the aluminum chloride prepared in Example 6 (concentration of aluminum oxide of 11.5%, basicity of 1.5% and sulfuric acid ion of 1.1%) were as follows.

6. Characteristics of raw water: C Final treatment of fluorine wastewater 800 mg / l of aluminum chloride (AC) and polychlorinated aluminum (PAC) were uniformly injected into the raw water.

enemy Water temperature (℃) pH F - (mg / l) 23.3 10.2 685

The aluminum chloride solution (AC) PAC 17% Injection amount (ppm) 800 800 Water temperature (℃) 24.1 24.2 pH 6.59 6.61 F - (mg / l) 9.2 20.5 F - Removal rate (%) 98.7 97.0

7. Characteristics of raw water: C Final treatment of fluorine wastewater 800 mg / l of aluminum chloride (AC) and polychlorinated aluminum (PAC) were uniformly added to the raw water.

enemy Water temperature (℃) pH F - (mg / l) 23.4 10.5 1193

The aluminum chloride solution (AC) PAC 17% Injection amount (ppm) 800 800 Water temperature (℃) 24.1 24.3 pH 6.67 6.69 F - (mg / l) 9.8 27.5 F - Removal rate (%) 99.2 97.7

As in the experimental example described above, the concentration of aluminum oxide (Al 2 O 3 ) finally prepared according to the production method of the present invention is 7 to 15%, the basicity is 0.1 to 10.0%, and the sulfuric acid (AC) which satisfies the concentration of ions in the range of 0.001 to 5.0%.

As described above, aluminum chloride (AC) produced according to the present invention exhibits an excellent effect on fluorine removal efficiency. Conventional polychlorinated aluminum (PAC) maintains a concentration of aluminum oxide of 10 to 17% and a basicity of 35 to 65%, resulting in outstanding effects on waterworks and industrial floats, It is well known that it has been maintained.

However, the conventional polychlorinated aluminum (PAC) as described above does not exceed the limit of the removal rate of fluorine (F), and due to an excess amount of the injection amount of expected value, It is difficult to expect a stable removal rate as well as an increase in cost. However, it has been difficult for a technician to handle and manage water. However, due to the aluminum chloride (AC) according to the present invention, do.

The present invention is not limited to the above-described embodiments, and various modifications may be made within the scope of the technical idea of the present invention.

S100. The first mixture composition step
S110. Aluminum chloride production step
S120. Secondary mixture composition step
S130. Production step of aluminum chloride

Claims (26)

A method for producing a coagulant for water treatment, comprising precipitating phosphorus and fluorine contained in sewage or waste water by coagulation through chemical treatment to form a flocculant,
(a) preparing a primary mixture at a ratio of 220 to 310 parts by weight of hydrochloric acid (HCl) and 12 to 92.5 parts by weight of water relative to 100 parts by weight of aluminum hydroxide (Al (OH) 3 );
(b) preparing aluminum chloride by reacting the mixed mixture in the step (a) under a predetermined temperature condition;
(c) 2 to 25 parts by weight and 4 to 145 parts by weight, based on 100 parts by weight of aluminum hydroxide (Al (OH) 3 ) into which aluminum sulfate and water (H 2 O) Forming a second mixture at a ratio of parts by weight; And
(d) preparing a stabilized aluminum chloride by completing the bonding of sulfate ions in the aluminum chloride so that the reaction can be performed while stirring the secondary mixture mixed in the step (c) under a predetermined temperature condition The method for producing a flocculant for water treatment according to any one of claims 1 to 3, The method according to claim 1, wherein the aluminum hydroxide (Al (OH) 3 ) in the step (a) has a concentration of aluminum oxide (Al 2 O 3 ) of 50 to 65% ≪ / RTI > [3] The method of claim 2, wherein the concentration of hydrochloric acid (HCl) in the step (a) is 30 to 35%. The method for producing a flocculant for water treatment according to claim 3, wherein the aluminum hydroxide (Al (OH) 3 ) can be used in place of other aluminum compounds in the step (a) . The method of claim 4, wherein the hydrochloric acid (HCl) is used in place of other compounds in the chloride state in the step (a). [7] The method of claim 6, wherein the hydrochloric acid (HCl) in the step (a) is mixed with another compound in the 2A group chloride or the 3B group chloride or the 4B group chloride in the periodic table of the elements. (EN) METHOD FOR MANUFACTURING COEFFICIENT FOR WATER TREATMENT. The method according to claim 1, wherein the reaction temperature of the first mixture in the step (b) is in the range of 90 to 160 캜 for 4 to 12 hours. . The method of claim 7, wherein the aluminum chloride produced in the step (b) has a concentration of aluminum oxide (Al 2 O 3 ) of 7 to 21%. The method according to claim 1, wherein the aluminum sulfate in the step (c) is characterized in that the concentration of aluminum oxide (Al 2 O 3 ) is 5 to 17% and the concentration of sulfate ion (SO 4 2- ) is 10 to 50% By weight based on the total weight of the flocculant. The method of claim 9, wherein the aluminum sulfate in the step (c) can be used in place of another compound in the sulfate ion salt state. [10] The method according to claim 10, wherein in step (c), the aluminum sulfate is used in place of the compound consisting of the elemental compounds 1A, 2A, 3B and 4B in order to ensure the stability of the product Wherein the fluorine removal capability is improved. The method according to claim 1, wherein in the step (d), the secondary mixture is stabilized while stirring at a stirring speed of 35 to 90 rpm under a temperature condition of 30 to 90 캜 for 0.5 to 4 hours A method for producing a coagulant for water treatment improved in fluorine removing ability. The method according to claim 12, wherein the aluminum chloride (Al) is stabilized through the step (d) in a concentration of 7-15% of aluminum oxide (Al 2 O 3 ), 0.001-5.0% And a basicity of 0.1 to 10.0%. The method for producing a coagulant for water treatment according to claim 1, A coagulant for water treatment, which precipitates by forming a floc by coagulating a poorly decomposable phosphorus and fluorine contained in sewage or sewage or wastewater through a chemical treatment,
Aluminum hydroxide (Al (OH) 3 ) was prepared by preparing a primary mixture at a ratio of 220 to 310 parts by weight of hydrochloric acid (HCl) and 12 to 92.5 parts by weight of water to 100 parts by weight of aluminum hydroxide Next, 2 to 25 parts by weight and 4 to 145 parts by weight of a secondary mixture are mixed with 100 parts by weight of aluminum hydroxide (Al (OH) 3 ) into which aluminum sulfate and water (H 2 O) Wherein the aluminum chloride is reacted with the aluminum chloride under stirring at a predetermined temperature to complete the bonding of the sulfate ion to the aluminum chloride to form aluminum chloride in a stabilized state. 15. The flocculant for water treatment according to claim 14, wherein the aluminum hydroxide (Al (OH) 3 ) has a concentration of aluminum oxide (Al 2 O 3 ) of 50 to 65%. 16. The flocculant for water treatment according to claim 15, wherein the hydrochloric acid (HCl) has a concentration of 30 to 35%. The flocculant for water treatment according to claim 16, wherein the aluminum hydroxide (Al (OH) 3 ) can be used in place of another compound in an aluminum salt state. The flocculant for water treatment according to claim 17, wherein the hydrochloric acid (HCl) can be used in place of other compounds in a chloride state. The flocculant for water treatment according to claim 18, wherein the hydrochloric acid (HCl) can be mixed with other compounds in the 2A-family chloride, 3B-family chloride or 4B-family chloride state on the periodic table of the elements. 15. The flocculant for water treatment according to claim 14, wherein the reaction temperature of the first mixture is in the range of 90 to 160 DEG C for 4 to 12 hours. The flocculant for water treatment according to claim 20, wherein the aluminum chloride has a concentration of aluminum oxide (Al 2 O 3 ) of 7 to 21%. 15. The method as claimed in claim 14, wherein the aluminum sulfate has a fluorine removal capability of 5 to 17% in aluminum oxide (Al 2 O 3 ) and 10 to 50% in sulfate ion (SO 4 2 - ) Improved flocculant for water treatment. The flocculant for water treatment according to claim 22, wherein the aluminum sulfate can be used in place of other compounds in the form of sulfate ion salt. [Claim 24] The method according to claim 23, wherein the aluminum sulfate is used in place of a compound consisting of an elemental compound of groups 1A, 2A, 3B and 4B in order to ensure the stability of the product. This improved flocculant for water treatment. 15. The method according to claim 14, wherein the secondary mixture is stabilized while stirring at a stirring speed of 35 to 90 rpm under a temperature condition of 30 to 90 DEG C for 0.5 to 4 hours. Coagulant for. The method according to claim 15, wherein the aluminum chloride (AC) satisfies the conditions of a concentration of aluminum oxide (Al 2 O 3 ) of 7 to 15%, a concentration of sulfuric acid ions of 0.001 to 5.0% and a basicity of 0.1 to 10.0% Wherein the fluorine removing ability is improved.
KR1020140012755A 2014-02-04 2014-02-04 Improved ability to remove fluoride method of producing a coagulant for water treatment and its preparation method of manufacturing a coagulant for water treatment KR20150091929A (en)

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KR20180080562A (en) * 2017-01-04 2018-07-12 이용원 Polyaluminium chloride coagulants having low basicity and manufacturing method thereof
KR102016722B1 (en) * 2018-12-07 2019-09-02 삼구화학공업 주식회사 Preparation method for flocculant composition for treating wastewater with improved water treatment efficiency
KR102093994B1 (en) * 2019-10-10 2020-05-26 고도화학(주) Preparation method of low basicity coagulant using strong acid hypochlorite water and water treatment method using same
KR20210038506A (en) * 2019-08-19 2021-04-07 삼구화학공업 주식회사 Preparation method for flocculant composition for treating wastewater with improved water treatment efficiency
KR102438805B1 (en) * 2022-05-18 2022-09-01 주식회사 에스엠씨엔지니어링 Purifying method of wastewater containing fluoride ions
CN115571963A (en) * 2022-10-17 2023-01-06 西安西热水务环保有限公司 Synchronous turbidity-reducing and fluorine-removing medicament and use method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180080562A (en) * 2017-01-04 2018-07-12 이용원 Polyaluminium chloride coagulants having low basicity and manufacturing method thereof
KR102016722B1 (en) * 2018-12-07 2019-09-02 삼구화학공업 주식회사 Preparation method for flocculant composition for treating wastewater with improved water treatment efficiency
KR20210038506A (en) * 2019-08-19 2021-04-07 삼구화학공업 주식회사 Preparation method for flocculant composition for treating wastewater with improved water treatment efficiency
KR102093994B1 (en) * 2019-10-10 2020-05-26 고도화학(주) Preparation method of low basicity coagulant using strong acid hypochlorite water and water treatment method using same
KR102438805B1 (en) * 2022-05-18 2022-09-01 주식회사 에스엠씨엔지니어링 Purifying method of wastewater containing fluoride ions
CN115571963A (en) * 2022-10-17 2023-01-06 西安西热水务环保有限公司 Synchronous turbidity-reducing and fluorine-removing medicament and use method thereof

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