TW573011B - Organic anti-scaling agent and method for producing the same, and anti-scaling method for scrubber - Google Patents

Abstract

An organic anti-scaling agent includes octadecyl amine reactive with hydrochloric acid, and chitosan reactive with hydrochloric acid; the organic anti-scaling agent is injected into a scrubber through an injection inlet by an automatic pump; water circulates through the scrubber by a circulation pump in order to diffuse the organic anti-scaling agent; or alternatively, the organic anti-scaling agent is injected into a maintenance inlet of the scrubber and a circulation pump delivers the anti-scaling agent into the scrubber to diffuse naturally; such that the scrubber can be effectively prevented from scaling or the scaling can be removed without stopping the operation or being damaged.

Description

573011 V. Description of the invention (1) Technical field to which the invention belongs

The present invention relates to an organic anti-fouling agent, a process and application thereof, and more particularly, to an anti-fouling formulation and method for washing a column (S c r u b be r). In the prior art, factory waste gas is generally divided into organic waste gas (VOCs) and acid-base inorganic waste gas. Most of the acid-base inorganic waste gas is treated by scrubbing towers to treat gaseous pollutants in the waste gas, such as HF, HC1, H2S04, and so on. For example, Si02, through the contact between the gas and the liquid, the pollutants in the gas are transferred to the liquid to achieve the purpose of cleaning the gas. However, problems such as the accumulation of scale deposits, nozzle clogging and machine parts wear often occur in washing towers, especially the accumulation of scale deposits can quickly and lead to excessive system pressure loss, which not only consumes energy, but also requires frequent 4 machine processing, these cause great loss of production costs and unexpected accidents. In order to solve the problem of scaling of the washing tower, the traditional solution is to soak it with an acid or alkali solution under controlled time, and to dissolve the scales which etch the equipment of the washing tower to remove the scales, or use high pressure The water column rinses the scale to remove the scale. Because it is difficult to accurately control the dissolution and erosion time by using acid or alkali solution to soak the scale, so the scale cannot be effectively removed, and the soaking of the acid or alkali solution will corrode the washing tower device, so it is easy to cause the washing tower. Reduced service life. When the high-pressure water column is used to flush the washing tower to remove scale, the narrow device of the washing tower will generate dead angles for washing, so f high-pressure water column cannot

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573011 V. Description of the invention (2) The scale was washed efficiently, and when washing with a pressure water column, the washing tower must withstand the impact of high pressure to easily deform the washing tower and shorten the service life. In addition, when using acid or test solution soaking or high-pressure water column for manual cleaning, the operation of the washing tower must be stopped for manual cleaning, which not only causes production interruption, but also takes time. Furthermore, the use of manual cleaning to treat the scale can not be effectively removed, and it is easy to produce dead spots for cleaning. In particular, the washing tower is mainly composed of small and narrow inner tube walls. The accumulation of scale is still easy to form, and manual washing causes the washing tower. Shortened service life is also an unavoidable problem. On the other hand, in many experiments and papers, f-octadecylamine has the effect of decomposing scale, but there is no actual response f, and in practical applications, the use of octadecylamine still requires g problem. In addition, the treatment of scale in the washing tower has two problems. One is that the water used in the washing tower is not purified or treated, which is very easy to generate and accumulate scale. The other is in industrial applications. To the south, as mentioned above, various gaseous pollutants and particles are transported into the water. Therefore, any agent applied to the water must not cause harmful chemical reactions and can coexist with it. Therefore, it is desirable that a simple method for fouling the washing tower prevents the washing tower from shortening the service life due to the treatment method. Summary of the Invention i The main object of the present invention is to provide an organic anti-scaling agent used in a washing tower, a method for preparing the anti-scaling agent ^, and using the anti-scaling agent.

573011 V. Description of the invention (3) The method of the scale agent in the washing tower can effectively prevent or remove the scale deposits in the washing tower without stopping the washing tower and damaging the washing tower. According to the present invention, a method for preparing an organic antiscalant includes reacting octadecylamine with a first concentration of hydrochloric acid to produce a first product and reacting chitosan with a second concentration of hydrochloric acid to produce a second product. And adding the second product to the first product to form the organic anti-fouling agent. i Organic anti-fouling agents prepared according to this method include jh octylamine reacted with hydrochloric acid to generate positively charged compounds, which can form scale and metal corrosion on the surface of the aging system, and the reaction between chitosan and hydrochloric acid. Cationic amine-based polymer compounds can promote the sedimentation of suspended matter and inhibit microorganisms. According to an embodiment of the present invention, an anti-scaling method for a washing tower includes installing an automatic dosing pump on an injection port of the washing tower, and driving the automatic dosing pump to automatically inject the organic anti-scaling Agent at the injection port; and driving a circulation pump to diffuse the organic anti-fouling agent. According to another embodiment of the present invention, an anti-fouling method of a washing tower includes injecting the organic anti-fouling agent into a maintenance port of the washing tower, the maintenance port being connected to a suction port i of a circulation pump of the washing tower, This allows the organic anti-fouling agent to diffuse naturally in the washing tower. |: The organic anti-scaling agent of the present invention forms r-nh3 + in water by octadecyl amine, which causes the cationic end of the molecule to be anionically charged | the surface is bound by adsorption and charge, and the molecule is non-polar The end extends into the ginseng solution to form a monomolecular film (water-repellent) on the surface of the system.

573011 V. Description of the invention (4) repellent film), which can prevent the deposition of suspended inorganic solids in the washing tower of semiconductor and liquid crystal display manufacturing industry. Octadecylamine forms R-NH3 + in water, and has the function of the polar and non-polar ends of the molecular cation. It can change the polarity of the material in the system and reduce the surface tension in the water to effectively form a dispersing and dissolving effect in the water. Original inorganic scale deposits. Both octadecylamine and chitosan can inhibit the growth of microorganisms and algae in water, and thus can control the production of microorganisms in the polyester tower. Chitosan (reacted as a polymer compound with a polycationic amine group) can be neutralized by charge neutralization (neutralization of charge with a cationic 1 suspended substance) and bridging action (molecular bonding) to remove The suspended matter in the cooling water system maintains the water quality of the water in the washing tower within the normal operating range. Embodiments The raw materials required for preparing the organic anti-scaling agent of the present invention include water, hydrochloric acid, chitosan, octadecylamine, and non-ionic surfactant (polyxyethylene sorbitan monolaurate) ° Preparation of the organic anti-scaling agent The method involves reacting octadecylamine and chitosan with hydrochloric acid to produce an A product and a B f product, and then mixing the A product and the B product to form the organic anti-scaling agent. The detailed steps for making A product include adding octadecyl | amine to deionized water containing a nonionic surfactant. Preferably, the amount of the nonionic surfactant used is 0 |. 5 times, and mixed by a stirrer to disperse octadecylamine in water uniformly. Then 0.5: 1 Moore

573011 V. Description of the invention (5)

In contrast, hydrochloric acid reacts with octadecylamine, and the reaction temperature is controlled to 50 ° C. During the reaction, a stirrer is used to mix uniformly, and the reaction time is 10 to 15 minutes, so that 50% of octadecylamine becomes a band. A compound with a positive charge (-NH3 + Cr) is the product of A. The product A has the characteristics of a surfactant, so that the original compound can be uniformly dispersed in water and completely dissolved in water. At this time, the solution of the product A presents a viscous translucent white liquid A. The reaction equation of the product A is: ;

CH3 (CH2) 17NH2 + 0. 5HC1 — 0 · 5CH3 (CH2) 17NH2 + 0. 5CH3 (CH2) 17NH3 + C1- On the other hand, the detailed steps for making the B product include hydrochloric acid with a weight ratio of 1: 4 · 5. The chitosan is reacted in deionized water, and the reaction temperature is controlled to 40 ° C. During the reaction, a homomixer is used to mix the homo sentences. The reaction time is 20 to 25 minutes, so that all the chitosan forms water-soluble. It has polycationic amine-NH3 + C1_ polymer compound, that is, the substance presents a transparent liquid with high viscosity.

The reaction equation of product B is:

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I chitosan-NH2 + HCl-> chitosan-NH3 + Cl '

Page 10 573011 V. Description of the invention (6) will have a higher content, and the control will be completely uniform and continue to stir. All organic residues, microbial characteristics, the organic anti-caking agent

Then, the process of mixing the A product and the β product includes the viscous B product in a gradual manner, and slowly enters the A product. The system is about 10 minutes: Tim: Finish, make it mutually interact with each other, and control the reaction temperature to 40 t. After the addition, stir evenly with a blender. Minutes, that is, the formation of the J is to consider the organic anti-scaling agent; ", the weight ratio of ingredients does not exceed 10% of the weight of deionized water. Octadecylamine has the ability to prevent system surface scaling and properties Ding Juku has the ability to promote the sedimentation of suspended matter and 'manufacturing' rather than ionic boundary. The addition of active agent is to improve the dispersibility of scale in water 'to avoid the organic anti-scaling degree. The occurrence of agglomeration phenomenon' is better The weight ratio of the organic anti-caking agent is: 1 A product + 0 · 5 B product + 0 · 5 non-ionic surfactant—organic anti-scaling agent The above-mentioned organic anti-scaling agent is used to achieve anti-scaling in the washing tower The main feature of the effect is that the cationic end of the molecule of the long-chain fatty amine in the organic anti-scaling agent is combined with the anionic surface of the metal wall of the washing tower due to adsorption and charge, and the non-polarity of the molecule is The end extends into the aqueous solution, so a monomolecular water-repellent film characteristic is formed on the surface of the system, which can prevent the scale of suspended inorganic solids (C a C 0 3, M g C 〇 3). Deposition and control

573011 V. Description of the invention (7) Physical and soft moving (Microbial system with one picture and one washing system) The connection to the front end and the scaling method include the addition of octadecylamine to Pushen 16 or 18, and Huanpu 1 The 4 drive is diffused and protects or prevents Laxi. The present invention to a proper high scale agent injection maintenance port 20 to the internal scale on the natural diffusion wall is particularly similar to the application of the scrubbing tower in the waste acid plus the 彳 / L scale. Ground use, minus IC)! Xihuan 12 is the height of the washing process invented by the circulation, the adhesion of scale additives on the metal surface, thereby preventing the biological 1y Influenced Corrosion, a top view of the polyester tower 10, which has a cycle to pull the washing tower 10 Pump 1 4 is between the rear end injection ports 16 and 18. In the washing tower 10, water is added to an organic anti-caking agent suitable for chitosan formulation. The automatic dosing pump is installed at the front or rear end to inject the organic anti-scaling agent into the washing tower 1 〇 The water was circulated through the washing tower 10 internally, and the organic anti-holding concentration was more than one within the washing tower 10, so the scale on the wall of the system wall of the ring 12 and the washing tower 10 was obtained. Another method embodiment includes inhaling the maintenance port 20 of the washing tower with octadecylamine and chitosan in the washing tower 10, and the suction of the anti-tightening circulation pump 14 Mouth, and then _ cloth to wash, to remove or prevent Laxihuan 丨 2 and polyester tower 〇 物 0 |, the anti-scalant agent of the present invention does not erode & polyester tower, the pollution gas or particles adversely react The waste alkali washing tower and the water in the washing tower can also be used. The method of the present invention can reduce the number of shutdowns of the washing strip tower 10 in the washing tower system 〇 and improve the system's sexual rot. # 生生. The 14th stuffing Pu Pu Suta Kang automatically injected the above one. When the scaling agent is removed, water is added. The organic anti-oxidant passes through the polyester tower 10 system tube and is not directly added to the medium. Stable 573011

The method of the present invention can also directly add the organic anti-scaling agent to the washing process because the organic anti-scaling agent does not have rot. Therefore, the downtime maintenance time and liquid immersion are destroyed by manual cleaning. Disadvantages of water column and acid shutdown maintenance, and reduce the use of the system when the system is shut down due to the loss of 0. It is easy to implement by the corrosive and f method, and avoid dissolving the Raxi ring due to high pressure f and acid or alkali. The method described in this article can be used in the system conversion of the column 10 system, and the micro mechanism of the organic anti-scaling agent that is damaged by manual maintenance such as immersion in alkaline solution and dipping will be as follows: Organic, 20 has a polar head 22 (Polar head) 22 and a non-polar tail (Nonpourat II and Li 'Tong are used in Ying Pi Pi IT0, the polar head 22 is often attached to the surface of the wall 26 The surface 26 is caused by the heap of organic matter 20, and the organic antiscalant 28 used for the characteristics of the scale adsorbs the polar head 22 of the organic matter, affecting the crystallization process of the organic matter 20. The scale agent 2 8 has the property of changing the polarity. Therefore, the particles will remain dispersed and suspended in the medium. At a low disturbance, 1 will be in a loose gel state, which can increase the chance of the organic anti-scale agent 2 8 to adsorb organic matter 2. Anti-fouling = 28 and the surface tension can be changed to improve the solubility of salts. The first graph is the change of the scale removal rate of the organic anti-fouling agent of the present invention when applied to the Laxihuan. The curve 30 is per liter. 50,000 mg of organic anti-fouling agent added to the system cycle ^ The measured Rasig ring scale removal rate 'curve 3 2 is the measured Rasig ring scale removal rate when 5,000 mg of an organic anti-scaling agent is added per liter of system circulating water, Curve 3 4 is the scale removal rate of Raschig ring measured with deionized water.

Page 13 573011 V. Description of the invention (9) The deionized water is pure water which has been ion exchanged and distilled. As shown in the third figure, the organic anti-fouling agent has a better fouling removal rate than the deionized water, and the more the organic anti-fouling agent is used, the faster the fouling treatment speed. Define the total weight of scale as ws, g in water (total body weight as Ww, total solid weight Wt of the system as ^ and ^, ie i:

Wt = Ws + Ww! [EQ-1], where Ww can be learned:

Ww = V X C [EQ-2], where V represents the volume of water in the tank, and C represents the solid concentration in water. Assume that before discharge, Wt before dosing is equal to WT after dosing, that is:

Before Wt dosing = after Wt dosing [EQ-3], the efficiency of scaling removal can be calculated from the mathematical formula EQ-3 as follows: ί Cleaning efficiency = (Before Ws-After Ws) / Before ws = (Ww Before -Ww) / Before Ws [EQ-4], through the derivation of the mathematical formulas EQ-1 to EQ-4, and measuring ^ and ^, you can get the scale removal rate, and compare which methods can be used to get Best clear

Page 14 573011 xly ο 11 The illustration of the hair agent scale * is clearly explained. The xi hair change is based on the solution of the collapse of the 50 series into the scale. The ring-washing of the middle-rate water-efficient block of the four knots makes the same inequality of the follow-up system '1 equal to 6 3 per kilogram of knots. Foul scale scale ring-shaped loop-shaped system-by-block system measurement measurement of the volume of the public place every time the water in the agent system scale leaves 8 knots 3 line resistance using a curved machine, with a system rate of 40 4- In addition to grams of line to milliqu 00, the scale 50 rate resistance machine has this indication, the map is the same as the four kinds of water • Ν Ο rate of water through a series of water 0 to the more pure water and steam away and To change the cross ratio agent, the descaling machine has a higher rate, and when it is removed, the physical scale at the same time is in the same block, and the high-rate removal of the scale removes the scale. The formation of scale is good. High-scale scale-like block J1. There is a Mingfa machine that uses the scale parameter of Figure 5 to change the parameters of the parameters. Gram ο ο 5 Entrance I force detection. After the water number loop ginseng, the scale resistance mechanism is useful. 42 In the graph system, the length of the graph is shown in Figure 4 and the length of the graph. The resistance machine has to add d and 4 • J2 and the additive value are not tied to the addition of the tower, the scale is not cleaned, the specific corrosion resistance is far away, I-machine-rotten electricity has a liquid to guide the dissolution of the alkali to strengthen Agent, or scale, due to strong resistance, the machine becomes small and the difference is caused by the phase PΗ. ) The water pipe of the wall P is affected by the scale and the scale. The scale is scaled. That is, the high degree of electricity can lead to the scaling of the additive, the scale absorption and the addition of anti-organic additives. After the agent, the agent should be attached to the inhalation to increase the uniformity of the antibody. Use sink and indicator to show the concentration, and the post-caking resistance of the floating agent when the solid is high.

Page 15 573011 V. Description of the invention (11) Fouling to remove the accumulation of the fouling. In order to maintain a better anti-fouling effect, in the system of the first figure, the organic anti-fouling agent and water in the washing tower 10 are maintained at a ratio of & and the concentration is periodically detected. The invention aims at washing scales on the wall of the Talaxi ring and its system.

I has obvious and effective softening and cleaning effects. After actual test results, it can improve pressure loss problems caused by scaling over 70% ~ 80%. Therefore, it can replace acid or alkali solution soaking and extreme pressure. Water column and other manual cleaning methods, and reduce the cost of using manual cleaning and reduce the damage to the filler such as Raschig ring and the wall of the system. Furthermore, in terms of industrial safety and environmental protection, the use of the method of the present invention on site can avoid the problems of wastewater and sludge treatment caused by the removal of the Laxihuan outside the factory for cleaning. The above description of the preferred embodiment of the present invention is for the purpose of illustration, and is not intended to limit the present invention to the precise form disclosed. Modifications or changes are possible based on the above teachings or learning from the embodiments of the present invention. The embodiments are selected and described in order to explain the principles of the present invention and allow those skilled in the art to use the present invention in practical applications through various embodiments. The technical idea of the present invention is intended to be derived from the following "application scope of patents and their equivalence" Decide.

573011 Schematic illustration for the person skilled in the art, from the detailed description made with V and accompanying drawings, the present invention can be understood more clearly, its above and other purposes And advantages will become more obvious |, where: the first picture is a top view of a washing tower; the second picture shows the micro-mechanism of the organic anti-scaling agent; the third picture is the application of the organic anti-scaling agent of the present invention in Change graph of scale removal rate of Laxihuan; the fourth graph is the change graph of using the organic anti-scalant of the present invention to disintegrate the massive scale at different concentrations; and the fifth graph is the use of the present invention Of various water quality parameters for the treatment of massive scale by organic anti-scale agents. Drawing number description 10 Washing tower 12 Laxihuan 14 Cyclic pump 16 Front end injection σ 18 Back end injection V20 Organic material 22 Polar head 24 Non-polar tail 26 Lacy ring and the surface of the system tube 28 Organic anti-scaling agent

Page 573011 Simple illustration

30 Raschig scale removal rate curve measured when adding 500 mg of organic anti-fouling agent per liter of system circulating water 32 Adding 5000 mg of organic anti-fouling agent per liter of system circulating water Rasig ring scale removal rate curve measured with scaling agent 34 Rasig ring scale removal rate curve measured with deionized water Add 500 mg of liters per liter of system circulating water Curvature removal rate of bulk scale measured when using organic anti-fouling agent f 38 Mass scale measured when adding 5000 pg of organic anti-scale agent per liter of system circulating water Removal rate ^ line 40 Mass scale f removal rate curve measured when using deionized water 4 2 Water quality without organic anti-scaling agent is shown in the bar chart 44 Items with organic anti-scaling agent Bar chart of water quality parameters

Page 18

Claims (1)

573011 _ Case No. 92109557_ Year Month Day Amendment. _ 6. Scope of patent application Add one dose of the organic anti-scaling agent in a time period. 6. The anti-fouling method according to item 5 of the scope of the patent application, wherein the organic anti-fouling agent is more than a certain proportion of the water in the washing tower. 7. If the anti-fouling method in item 5 of the patent application scope includes detecting the concentration of the organic anti-fouling agent in the washing tower. 8. An organic anti-fouling agent, comprising: a first solution having octadecylamine and hydrochloric acid; the octadecylamine reacts with the hydrochloric acid to form a compound having a positive charge; Ear ratio is 0.5: 1; a second solution of chitosan and hydrochloric acid, the chitosan reacts with the hydrochloric acid to form a polycationic amino polymer compound, and the weight ratio of the hydrochloric acid to the chitosan 1: 4.5; and a nonionic surfactant to improve the dispersibility of the octadecylamine and chitin polymerase in water; the first and second solutions are uniformly mixed in a deionized water, and the organic anti- The weight of the organic component of the scaling agent is not more than 10% of the weight of the deionized water. 9. A method for preparing an organic anti-scaling agent, comprising the following steps: reacting a first concentration of hydrochloric acid with octadecylamine to produce a first product and reacting a second concentration of hydrochloric acid with chitosan to produce a first A second product; and the second product is slowly added to the first product to form the organic anti-fouling agent. 10. The method according to item 9 of the scope of patent application, wherein the first product 573011 _Case No. 92109557_ Modification of Year of the Year_ 6. The generation of the scope of patent application includes the following steps: adding the octadecylamine to deionized water with a non-ionic surfactant; and adding the hydrochloric acid to the containing 18 Base amine and non-ionic surfactant in deionized water. 11. The method according to item 9 of the scope of patent application, wherein the production of the second product includes the following steps: adding the chitosan to deionized water with a nonionic surfactant; and This hydrochloric acid was added to the deionized water containing octadecylamine and a nonionic surfactant. 12. The method of claim 9 in which the second product is added to the first product includes the following steps: 〃 adding the second product to the first product in drops; and stirring the first and second products. A mixed solution of the two products. 13. The method of claim 9 in the scope of patent application, wherein the molar ratio of the first concentration of hydrochloric acid to the octadecylamine is 0.5: 1. 14. The method according to item 9 of the scope of patent application, wherein the first concentration of hydrochloric acid reacts with the stearylamine system at a temperature of 50 ° C. 15. The method according to item 9 of the scope of patent application, wherein the reaction time of the first concentration of hydrochloric acid and the octadecylamine is 10 to 15 minutes. 16. The method according to item 9 of the scope of patent application, wherein the weight ratio of the second concentration of hydrochloric acid to the chitosan is 1: 4.5. 17. The method according to item 9 of the scope of patent application, wherein the second concentration Page 21 573011 Case No. 92109557 Amendment 6. The patent application scope of hydrochloric acid reacts with the chitosan system at a temperature of 40 ° C. 18. The method according to item 9 of the scope of patent application, wherein the reaction time of the second concentration of hydrochloric acid and the chitosan is 20 to 25 minutes. 19. The method of claim 9 in the scope of patent application, wherein the step of adding the second product to the first product is at a temperature of 40 ° C. 20. The method according to item 12 of the scope of patent application, wherein the dropwise addition of the second product to the first product is completed within 10 minutes. Page 22