KR100457692B1 - Drinking water inhibitor a method of manufacture system - Google Patents

Abstract

The present invention is a manufacturing method and manufacturing apparatus for drinking water rust inhibitor, silicate (corrosion inhibitor used in the rust prevention method for drinking water and industrial pipe line) The present invention relates to a manufacturing method and a manufacturing apparatus of Quality Standard No. 3, No. 1 and No. 2 of the Water Quality Anticorrosive Agent established by the Ministry of Environment.

The present invention supplements the application No. 94-1229 filed by the inventor, the silicate rust inhibitor is a silicate powder or natural silica sand (Si0 ₂ : more than 99.9% purity) of about 0.1mm particle size and anhydrous sodium carbonate (Na ₂ Sodium silicate is produced by melting with CO ₃ ) and maintains weak alkalinity. Phosphoric anhydride (P) plays a role in water purification and silicate coating on the metal surface, and removes iron and removes iron. ₂ O ₅ ) and a metal ion blocking agent that reacts with hardness components in water and has a hard water softening effect and prevents pipe scale (SCALE). the phosphate coating hyeongseongryeok Among good tree forest sodium phosphate (Na ₅ P ₃ O _10), a condensed phosphate having the most stable high solubility in water also have surfactant properties of the inorganic metal in the line Containment capability is also and with fatigue combination of potassium phosphate (K ₄ P ₂ O _7), and carbon Carry (K ₂ CO ₃₎ to the bubble removal role of the melt, a composite salt rust inhibitor also increases the strength of the melt in addition to the combination of the By dispersing calcium carbonate (CaCO ₃ ) to increase the solubility strength when dissolved in water, it is melted in the manufacturing apparatus of the present invention, followed by tapping and fixing to a molding mold to obtain a crystallized glassy solid, which is the high pressure reaction It is a manufacturing method of anti-corrosive agent for drinking water that meets the enacted standard by the Ministry of Environment by liquefying by using the equipment (Autoclave). The manufacturing apparatus for obtaining the above crystals is a ground tunnel-type flat system which does not have pollution due to fuel and contains no impurities. A burner (GAS-BURNER) is used, and the bottom of the furnace uses a graphite crucible so that the melt does not come into contact with the refractory, and the main body of the furnace makes the upper and lower parts separate and combined Convenient for maintenance, and a manufacturing apparatus of a corrosion inhibitor equipped with automatic temperature sensor to measure the furnace temperature.

Description

Drinking water inhibitor a method of manufacture system

The present invention relates to a manufacturing method and a manufacturing apparatus for rust inhibitors for drinking water.

The present invention is a supplementary application of 'No. 94-1992' Preparation method of corrosion inhibitors based on silica powder, '' which the inventors pre- filed. ), Two kinds (silicates), and three kinds (complex salts) are classified into one type of phosphoric acid, two kinds of silicate powder or silica sand, and the three kinds of compounds are known to be composites of phosphoric acid and silicic acid. In addition, silicate-based AQUA-CLEAR (US), POLYECRON (Japan) and commercially available sodium silicate (Na ₂ SiO ₃ ), which are imported and sold in Korea, are also melts of silica sand and sodium carbonate. It is manufactured by dividing by wet method Dry method: Na ₂ CO ₃ + nSiO ₂ → Na ₂ O · nSiO ₂ + CO ₂

In addition, the SiO ₂ / Na ₂ 0 molar ratio (mol ratio) of sodium silicate (anhydrous powder) is well known that dozens of different types of sodium silicate are scattered in addition to 3.0 to 3.3. It is considered to be a technical standard according to suitable melt condensation of additives.

Prior arts confronting the present invention include Korean Patent Publication Nos. '92 -4017, '94 -24110, '96 -013482, and Publication No. '92 -4017 is made of 80% silica sand powder, which is almost It is considered that there is a disadvantage that it is difficult to dissolve in water because it is close to vitrification. Publication No. 94-24110 uses an additive different from the present invention, and Publication No. 96-013482 is a phosphate series. There is no prior art.

As the rust inhibitor composition suitable for the silicate corrosion inhibitor of the present invention is based on water treatment agent Environment specification, the particle size of 0.1mm silica powder or silica (SiO _2: purity ^99.9%), anhydrous sodium carbonate (Na ₂ CO _3), phosphoric acid anhydride (P ₂ O ₅ ), potassium pyrophosphate (K ₄ P ₂ 0 ₇ ), sodium trifoliate phosphate (Na ₅ P ₃ O ₁₀ ), and carbonic acid (K ₂ CO ₃ ) to melt the anhydrous sodium carbonate that acts as a SiO ₂ solubilizer. Dissolution by titration

Sodium silicate (Na ₂ SiO ₃ ) in the form of SiO ₂ + Na ₂ CO ₃ → Na ₂ SiO ₃ + CO ₂ ↑ and soluble in water, the more the sodium carbonate contained, the higher the solubility in water. As the melting temperature and melting time of compounding melting decrease in proportion to 4 to 5 hours at 1,500 ° C., the manufacturing cost of the product can be reduced. All of the described prior art describe high temperatures of more than 1,600 ° C. and excessive melt times upon melting. Silicate rust inhibitors of water quality rust preventives, enacted by the Ministry of Environment (1984), are classified into Class 2 (No. 1) and No. 2 (Liquid), and the content of SiO ₂ is No. 1 (solid) 64-75%, It is prescribed by No. 2 (liquid) 13-30%.

The composite salt rust preventive agent of the present invention is a manufacturing method in contrast to the present invention because the prior art application number '98 -32929 is a manufacturing method using the prepared silicate rust preventive agent. The compositions of the present invention is silica powder or silica (SiO _2: purity of at least 99. ^9%), anhydrous sodium carbonate (Na ₂ CO _3), phosphoric acid anhydride (P ₂ O _5), potassium pyrophosphate (K ₄ P ₂ O ₇ ), A mixture of sodium trifolio phosphate (Na ₅ P ₃ O ₁₀ ), carbonic carbonate (K ₂ CO ₃ ), calcium carbonate (CaCO ₃ ), and a composite of phosphate and silicate. When dissolved in water, it maintains an anionization with electrochemical affinity to prevent corrosion and rust on the surface of metal or nonferrous metal with soft composite film. , Composite salt rust inhibitors are classified into Class 3 No. 1 (solid) and No. 2 (liquid), and the content of SiO ₂ + P ₂ O ₅ is No. 1 (solid); 58-79%; No. 2 (liquid) 12- 46%. The liquefied rust preventive agent (2) is controlled based on the main component content of the Ministry of Environment by liquefying and fixing the crystals in a high pressure reactor (AUTOCLAVE) to liquefy at a certain temperature.

The manufacturing apparatus of the present invention is a ground tunnel type furnace, which maintains a high calorific value by using gas (GAS) fuel without pollution and containing no impurities, and the melt is melted in a graphite crucible to melt impurities or raw materials of refractory materials. It prevents the mixing of foreign substances by erosion of refractory by acid, and the upper part of the furnace is separated, so it is convenient for shaft and partial repair, and it is easy to move the manufacturing equipment. It is a manufacturing device that can.

The drinking water rust preventive preparation method of this invention can be divided roughly into the silicate rust preventive agent (class 2, 1, 2) and the complex salt rust preventive agent (class 3, 1, 2) suitable for the water treatment agent standard of the Ministry of Environment.

Sodium carbonate anhydrous (Na ₂ CO ₃ ) and anhydrous phosphoric acid (P ₂ O ₅ ), potassium pyrophosphate (K ₄ P ₃ P ₇ ), sodium triphosphate (Na ₅ P ₃ O ₁₀ ), carbonic carbonate (K ₂ CO ₃ ) By combining and melting calcium carbonate (CaCO ₃ ) respectively, the synergistic action between phosphate and silicate reduces the melting temperature and melting time, contributing to the reduction of production cost, and it does not melt well in water and crumbles after a certain period of time. The value of the product is upgraded by the continuous rust prevention effect which compensates for the shortcomings.

The manufacturing apparatus of the present invention can reduce pollution by using a gas fuel containing no pollution and impurities, can produce a large amount of melt according to the size of the furnace, and impurities and foreign substances are mixed into the melt using a graphite crucible. By separating and assembling the upper end of the furnace, the object is achieved as a manufacturing apparatus having convenience and mobility of the shaft and maintenance work.

1 is an embodiment diagram of the rust inhibitor composition of the present invention

Figure 2 is a water treatment standard test results of the rust inhibitor prepared by the rust inhibitor composition of the present invention

3 is a table of rust preventive standards of the Ministry of Environment, Japan Environment Agency

4 is a deposition test and corrosion rate measurement results of the anti-corrosive prepared with the composition of the present invention

5 is a cross-sectional view of the manufacturing apparatus of the present invention.

Figure 6 is a top separation cross-sectional view of the manufacturing apparatus of the present invention

7 is a plan view of the manufacturing apparatus of the present invention

8 is a manufacturing process diagram of the anti-corrosive agent

9 is a perspective view of the working table is installed in the manufacturing apparatus of the present invention

※ Explanation of reference numerals of the present invention

1. Iron flue 2. Refractory flue 3. Heat storage chamber 4. Graphite crucible 5. H beam

6. Hot water outlet 7. Gas outlet 8. Clasp 9. Steel plate (heavy plate) 10. Fireproof castable

11.Insulation material 12.Burner Settlement 13.Refractory Brick 14.H Beam 15.Hook

16. Raw material input tank 17. Automatic temperature sensor 18. Bolt assembly hole

Hereinafter, the configuration and operation of the present invention with reference to the accompanying drawings.

1 is an embodiment according to the composition of the silicate rust inhibitor of the present invention as a silica powder or silica (SiO ₂ : purity more than 99.9%) 54% by weight, sodium carbonate anhydrous (Na ₂ CO ₃ ) 33% by weight, phosphoric anhydride (P ₂ O ₅ ) 4% by weight, ₅ % by weight of potassium pyrophosphate (K ₄ P ₂ O ₇ ), 3% by weight of sodium triphosphate (Na ₅ P ₃ O ₁₀ ), 1% by weight of carbonic acid (K ₂ CO ₃ ) It was carried out by compounding.

The silica powder and silica sand (SiO ₂ ) have a particle size of about 0.1 mm and are alkalized by melting with anhydrous sodium carbonate (Na ₂ CO ₃ ) to form sodium silicate.

Anhydrous sodium carbonate (Na ₂ CO ₃ ) has a lower melting temperature as the amount added to SiO ₂ , alkali buffering ability, softening hard water, and also plays a role in pH control.

Phosphoric anhydride (P ₂ O ₅ ) is a white amorphous crystal that has iron rust removal and cleaning effect, forms a phosphate coating, is dissolved in water and replaced with phosphorous acid (H ₃ PO ₄ ).

Potassium Pyrophosphate (K ₄ P ₂ O ₇ ) is an alkaline solution, has a strong buffering effect, inorganic surfactant performance, and metal ion blocking action, which is the most stable among condensed phosphates and has high solubility in water. Since it is 11 times of sodium polyphosphate and 30 times of sodium pyrophosphate, it plays an important role in the solubility of rust inhibitors.

Sodium triphosphate (Na ₅ P ₃ O ₁₀ ) makes stable complexes with metal ions in hard water, which effectively softens hard water, disperses and removes corrosion factors of metal surface, and reattaches dispersed dispersion factors. It serves as a preventive metal ion blocker, and also prevents cake formation that becomes agglomerated in the compounding process and increases the corrosion inhibitory effect in the pipe.

The aqueous solution of carbonate (K ₂ CO ₃ ) exhibits strong alkalinity, increases the pH of the rust preventive agent, improves the commerciality of the rust preventive agent by dehydration and defoaming action, and dissolves and fixes the crystals (second type 1) dissolved in the above composition. It is placed in an autoclave made of heat-treated 4340 alloy (ALLOY STEEL), dissolved in a pressurized steam of 5-6 atm, and liquefied according to the standards of the Ministry of Environment (No. 2).

Silicates have long been used as corrosion inhibitors in drinking water systems in Gumi, where they are hydrolyzed in water to produce colloidal particulates that diffuse to form films and the resulting film is formed throughout the pipeline metal. In drinking water treatment systems, 8-16 ppm silica is usually found in water, but this monomer silica has no pipe protection, and the common form of molten silicate rust inhibitor is Na ₂ SiO ₃ , which can be used for corrosion control. It is this glassy amorphous polymer silicate rust inhibitor.

Complex salt corrosion inhibitor composition of the present invention is silica powder or silica (SiO _2: purity of at least 99. ^9%) 40% by weight, anhydrous sodium carbonate (Na ₂ CO ₃₎ 32% by weight, and phosphoric acid anhydride (P ₂ O _{5) 5%} wt. , potassium pyrophosphate _{(K 4 P 2 O 7)} 13 % by weight, the tree forest sodium phosphate _{(Na 5 P 3 O 10)} 8. 5 % by weight carbonate, Kari (K ₂ CO ₃₎ 1% by weight, calcium carbonate (CaCO ₃₎ it was blended with the composition of ^0.5% by weight. Calcium carbonate (CaCO ₃ ) is added only to the composite salt rust preventive agent to increase the strength of the melt, when dissolved in water, delayed control of the rapid dissolution of phosphate-based, the performance of the other additives are as described above. The crystals (Class 3 No. 1) dissolved and fixed in the composition were put into a high pressure reactor (AUTOCLAVE) made of heat treated 4340 alloy (ALLOY STEEL), dissolved in a pressurized steam at 5-6 atmospheres, and liquefied according to the standards of the Ministry of Environment. Third kind 2).

Figure 2 shows the results of the water treatment agent loading test of the rust inhibitor prepared by the rust inhibitor composition of the present invention. By melting and dissolving the composition of the present invention, the exact content values are 2 type 1 67.6%, 3 type 1 72.5%, 2 type 2 14.8%, 3 type 2 23.7%, as shown in the water treatment standard set by the Ministry of Environment. Suitability proved to be.

Figure 3 shows the water treatment agent specification table of the Ministry of Environment and the Japan Environment Agency.

Figure 4 is a result table of the deposition test and corrosion rate measurement test of the rust inhibitor prepared from the composition of the present invention. The carbon steel specimens were cut into rectangles to form holes at the top of a size of 75mm × 13mm × 1.2mm. The pretreatment of the specimens was polished with # 180 sandpaper, washed with distilled water and degreased with methanol. 4 is a picture of the test apparatus, the glass rod is placed horizontally on the beaker (A), tied to the upper hole of the specimen (B) as a fishing line, and then placed in an electromagnetic magnetic stirrer (for C: 15 spheres) and distilled water Each rust inhibitor was injected and tested for 12 days. Although the corrosion rate of the city water is about 20-25 mpy (Corrosion Rate), 2.93 mpy was confirmed in the distilled water of this test, and as shown in FIG. 4, the corrosion inhibitor of the present invention had a significantly lower corrosion rate (mpy). As a result, the rust prevention effect due to the passivation phenomenon is proved to be excellent.

5 is a cross-sectional view of the manufacturing apparatus of the present invention. The upper part is separated as shown in the drawing, the iron plate 9 is manufactured, and the lower part is also made of the iron plate, and the completed hardware is fixed on the steel frame of the H beams 5 and 14. The entire surface is covered with the heat insulating material 11 in the iron plate skeleton, and the fire brick (SK40: refractory degree 1,800 to 2,000 ° C.) is deformed according to the standard, and the bottom surface of the furnace maintains the same slope as the gas burner (GAS BURNER). Fix the studs (12) firmly. A tapping hole 6 is made at 3/5 of the melt area of the furnace to allow the melt to tap. At the bottom of the furnace, a graphite crucible (4) whose angle toward the hemispherical spout is kept at a slope of 15 ° is fixed with refractory mortar, and the heat storage chamber (3) storing and discharging heat directed to the chimney is exhausted by refractories. Directly connect with A gas outlet 7 is provided at the top center of the furnace to discharge the gas generated during melting, and an automatic temperature sensor (Senser) is installed next to the raw material inlet of the furnace to automatically sense the temperature in the furnace to automatically adjust the burner temperature. It is connected to the device to cut off and restore power according to the set temperature.

6 is a cross-sectional view of the separated upper end of the ground tunnel type. Manufacture the skeleton of the upper end with the iron plate (9), fix the clasp (8) that can be moved and lifted by fixing the left and right centers, and the gas outlet (7) to make a straight line with the tap of the lower end of the furnace, Dozens of "a" -type hooks 15 are attached so that the heat insulating material 11 and the refractory castable (10: 1,800 ° C refractory degree) are firmly constructed. The refractory cylinder 2 is fixed with the heat insulating material 11 and the refractory castable 10 to complete the axis of the upper end. After the drying operation, the upper end is lifted using the clasp 8, and the refractory mortar is applied to the joint and the upper and lower ends are assembled to complete the shaft work. The hopper of the raw material feeder is installed at the raw material inlet.

7 is a plan view of the ground tunnel type of the present invention. A screw hopper is installed through the blender 16 to feed raw materials.

8 is a manufacturing process chart of the rust preventive agent.

Figure 9 is a perspective view of the workbench installed around the furnace to facilitate the melting operation.

As the above-mentioned ground tunnel type furnace is melted on the surface of graphite crucible where the melt does not touch the refractory, the hygienic quality without refractory impurity is increased, and the upper and lower parts of the furnace are separated, so it is convenient to work on the shaft and repair. Is accomplished.

The preparation method of the anticorrosive for drinking water according to the present invention has the advantage of lowering the conventional melting temperature to 1,500 ° C. and doubling the productivity due to the shortening of the melting time by the proper mixing of the additives, and greatly affecting the cost reduction and melting using the graphite crucible. The crystals are produced by hygienic rust preventives that do not contain impurities of conventional refractory materials. Also, the liquefaction process is difficult to control precisely because water is supplemented with tap water when it is evaporated in a manner of melting 24 hours in the conventional direct heating liquefaction process. However, by using the vacuum distillation type high pressure reactor (AUTOCLAVE), product quality uniformity is achieved, and it is a corrosion inhibitor of drinking water pipe line and various pipe lines of all industries, and it has the effect of solubility certainty and antirust effect. It is an environmentally friendly corrosion inhibitor that is tasteless, colorless, odorless and nontoxic.

In order to achieve the above object, the manufacturing apparatus of the present invention uses a gas-free fuel, and the bottom of the furnace uses a graphite crucible, and a conventional raw material is melted in a refractory material and melted by erosion of an acid in the raw material. Although it contained a lot of impurities, it was able to compensate for these shortcomings. It can move the furnace itself, and it is separated into the upper and lower parts, which is convenient for shaft and repair work, and the partial repair can be completed in a short time. Can have

Claims (3)

Silicate corrosion inhibitor composition comprises silica powder (particle size 0.1mm) or natural silica (SILICA SAND: SiO ₂ purity of at least 99. ^9%) 54% Jungnang, anhydrous sodium carbonate (Na ₂ CO ₃₎ 33% by weight, and phosphoric acid anhydride (P ₂ O ₅ ) 4% by weight, 5% by weight of potassium pyrophosphate (K ₄ P ₂ O ₇ ), 3% by weight of sodium triphosphate (Na ₅ P ₃ O ₁₀ ), 1% by weight of carbonic acid (K ₂ CO ₃ ) crystals of the glass phase to the tapping within 4-5 hours at the melting temperature of 1,500 ℃ (2 jong No. 1) for getting into the crystals to a high temperature reactor (AUTOCLAVE) was dissolved in steam pressure of 5-6 atm SiO ₂ content (13 - Antirust method to liquefy (30%) to 30%). Complex salt corrosion inhibitor composition is silica powder (particle size 0.1mm) or silica (SILICA SAND: SiO ₂ purity of at least 99. ^9%) 40% by weight, anhydrous sodium carbonate (Na ₂ CO ₃₎ 32% by weight, and phosphoric acid anhydride (P ₂ O ₅ ) 5% by weight, potassium pyrophosphate (K ₄ P ₂ O ₇ ) 13% by weight, sodium tripolyphosphate (Na ₅ P ₃ O ₁₀ ) 8. ⁵ % by weight, 1% by weight of carbonic acid (K ₂ CO ₃ ), calcium carbonate (CaCO ₃₎ 0. ⁵ to tapping-in evenly blended, melt temperature 1,500 ℃ melted by 4-5 hours the weight percent gained crystals (three No. 1) of the glass phase into the crystals to a high temperature reactor (AUTOCLAVE) A rust preventive method that dissolves in pressurized steam at 5 to 6 atmospheres and liquefies SiO ₂ + P ₂ O ₅ content (12 to 46%). The melting furnace is movable as a ground tunnel type furnace, and the upper and lower parts are separated and manufactured to be coupled up and down through the bolt assembling holes, and the heat storage chamber 3 is installed to reduce the fuel consumption by latent heat in the furnace, and the bottom of the melting chamber. Has a hemispherical 15 ° inclined surface and installs the graphite crucible so that the melt flows well to the spout 6, and controls the melting temperature at 1,500 ° C through the automatic temperature sensor 17, An anti-corrosive manufacturing apparatus using a gas burner to allow the melt to tap into the tap (6).