TW452640B - Semi-offline feedback-type ozone water processing system for circulation water of cooling tower - Google Patents

Abstract

A semi-offline feedback-type ozone water processing system for circulation water of cooling tower uses the water characteristics in the cooling tower of a cooling circulation water system to alter the auxiliary system of a conventional cooling tower, and adds a neutralization agent into the replenishing water to pre-dissolve ozone gas into a high concentration ozone water which is injected into the top of the cooling water tower to sterilize and remove algae from the water. When ozone is used to treat the cooling water tower, the recycle water is bypassed and isolated as a backwash water required by the sand filtration tank. The invented method is different from a split-flow continuous ozone injection treatment used in the bottom tank of the current cooling water tower, and forms an ozone treatment process that has a high efficiency and a low cost.

Description

452640 V. Description of the Invention (1) [Field of the Invention] The present invention relates to a treatment system for circulating water in a cooling water tower using ozone as a disinfectant, and more particularly, to a semi-offline return-type ozone water treatment system. [Background of the Invention] 1. Yuelu · In many industries, the cooling water of the process or cold room often uses a cooling water tower to exchange heat with the atmosphere to return the high-temperature water exchanged in the equipment and recycle it after cooling. When the water quality deteriorates, it will be partially discharged. During the period, some water will be lost due to heat absorption and evaporation and the cooling water tower operation. The reduction of these circulating water quantities will be supplemented with clean water, which will form a cooling cycle process. In the long-term operation of circulating water of cooling water towers, in addition to the above-mentioned water balance problem, there is still a problem of qualitative changes in water quality. Since the cooling water tower system uses the atmosphere for heat exchange, the circulating water system must be open in this section and not completely closed. In the system, there will be many problems in the open process section. The common ones are: (1) The acidity of the circulating water is caused by the heat exchange, which causes the pH value of the circulating water to rise. (2) Evaporation of water, accumulation of impurities in the circulating water, increase in concentration, and obvious changes in water quality, such as increase in ion concentration, conductivity concentration, and solid concentration, which will cause scale, scale, or deposits on the cooling system. (3) In the cooling water tower, microorganisms are prone to growth due to foreign food sources, nutrition sources and sufficient dissolved oxygen, and even algae due to sufficient sunlight

Page 4 452640 V. Description of the invention (2) The species, protozoa, and mosquitoes breed. Once the debris of these organisms flows into the circulation system, it often forms problems of obstacles, blockages, attachment, and deposition. (4) In the microbiome in the water tower, if the presence of vector-borne bacteria exists, it will be scattered and attached to the atmosphere during the heat exchange process of the cooling tower, causing harm. The well-known "Veterans' Disease" is one of them. For these reasons, the operation of cooling water towers requires additional routine operations such as sterilization and algae killing. In the past, chlorine gas, which has a low price and good effect, was used as a disinfectant. However, in recent years, gas has been combined with organic substances to form carcinogenic toxicity. Substances have been banned in many advanced countries and areas with higher living standards. WHO (World Health Organization) has also urged to stop using other alternative agents, such as NaOC 1 (sodium hypochlorite), but in addition to the significant reduction in disinfection effect There are still negative effects such as Na +, C 1 and electrolyte increase after dissolution. Recently, some systems have introduced the 0 treatment method with good performance, but because 0 is a gas that will decompose on its own, its operating cost is still high, and under the operating conditions of high circulating temperature, high pH and large flow of cooling water, etc. The utilization rate is lower. At present, 0 has a self-decomposition effect and cannot be left. The injection method is a continuous injection process, so that the total cost of 0 treatment is still high. The high corrosiveness and toxicity of ozone are easier for users. It is questioned, so that the practical application is limited to a small number of special conditions and cannot be popularized. Therefore, the development of an effective treatment with low cost and high utilization rate is a topic worthy of discussion. Second, the analysis of the circulating water flow of the cooling water tower method The cooling circulating water flow using the cooling water tower as a heat sink is basically the hot water that is returned after heat exchange through the process equipment and passes through the cooling water tower.

Page 5 452640 V. Description of the invention ¢ 3) Dispersed water and heat exchange with the atmosphere, the heat energy is taken out by the air, and the water cooled by the gas is collected and filtered, and then sent to the process through a pressurized pumping machine for cooling Use, so constitute a continuous cycle process. Outside of the main circulation process, there is water loss due to evaporation of rising water temperature and atmospheric carryover. Concentration of components contained in water due to evaporation of water and accumulation of foreign substances cause water quality degradation, which must be discharged and diluted. Therefore, it must be supplemented by clean water, and these auxiliary measures of discharge and make-up water have also become an integral part of the circulation process. Dirt and debris intervening outside the circulation system, microorganisms generated in the water, and reaction products formed under oxidation and high temperature, will accumulate and become solids with larger particle sizes, which will settle and adhere in the circulation flow path to form scale. Fouling and fouling can hinder or block the circulation flow path and reduce the heat exchange efficiency. Therefore, filtration is generally used to remove these solids. In addition, due to temperature rise, the pH value in water quality rises, electrolyte scale (SCALE) is formed due to temperature, and the growth of microorganisms affects hygiene. Generally, there are medicating devices such as neutralizers, inhibitors and disinfectants. In the cooling water tower, the continuous return water flowing from the top is divided by the cooling water tower to disperse the scattered water to form water droplets, and it drops down in a free-fall manner. The atmosphere is introduced into the travel space of the drop to exchange heat with the water droplets. The warmed gas flows out of the water tower and is distributed in the air. The falling water droplets are collected and pressurized, and then sent to the process heat exchange device for continuous pressure flow for cooling. It is that the water body in the cooling water tower section is not a continuous water body, and its role is different from that of a continuous flow path. As far as the characteristics of the cooling water tower are concerned, it is actually contrary to the general method of scattered water.

Page 6 452640 V. Description of the invention (4) The devices should be similar. If the water treatment is similar, the cooling water tower is only used for the purpose of cooling water tower. The cooling water tower must be exposed to the atmosphere, foreign matter, air flow, dirt and debris. Under the physics of microbe, fineness and dissolution, many disadvantages will be formed to resolve. Microorganisms in the water, because of the source, it is easy to grow. The suspended matter that these microbiota fluidize in the water tower mainly uses the biofilm method to inhabit, theoretic biological filter bed. Therefore, it has always become a place where continuous injection of sterilization and loss of biofilm purification can be seen in its limited purification energy. Increasing the contact of the medium. Table III. Discussion of the treatment methods 1.0. Characteristics of ozone applied to water treatment : The device (STRIPPER), trickle filter, bed or contact bed uses are different for heat exchange. Therefore, its hydrological effect is being considered. For heat exchange, it must be open, so meeting things and other materials enter the circulation system, such as soil sand bacteria, etc. These substances in the water due to fluid force, temperature, chemical and biochemical reactions, the problem of long-term operation1 is therefore in operation Nutrient sources, food sources, oxygen and light energy must be added in a timely manner. Especially in the suitable environment of the cooling water tower, this process does not receive continuous water and becomes the structure in the fluid cooling water tower as a medium. The formation of these biofilms is beneficial Purification of water quality (Small surface area, limited results, and the trouble caused by the barrier operation due to the accumulation of falling media into the cooling process. In the way of bactericides, because microorganisms cannot physiologically function, sterilization is added in batches. Time, it is convenient, so if it can be in the environmental area of the cooling water tower, the biochemical treatment effect can be enhanced. It has a history of many years, mainly based on the following characteristics

Page 7 452640 V. Description of the invention (5) Points: (1) The ability to kill algae is extremely strong. When the necessary concentration is reached, the dose is about one-thousandth of the gas, and the sterilization time can be achieved in only a few seconds. Inactivation 99.9%. (2) High decoloring and deodorizing ability, it can decompose many kinds of high molecular substances and degrade COD. (3) The reaction mechanism is a unified reaction, and it is not necessary to deal with it separately for the purpose of use. . The by-products produced by mud pollution should be reduced, and the harmful water or the living body's associated air should not be reduced. After the residue of the poisonous poisonous substance is left, it should not be reversed. XI / 4 5 XIV Γν?-Ίϊ Subsequent mud sludge is beneficial for water removal and sludge reduction. Good quantity change 2. The difficulty of treating cooling circulating water with 0 is basically 0 holes in the cooling circulating water flow, and the above effect can also be obtained, but in fact, because the cooling circulating water is originally a closed circuit system, an open system of a section is sandwiched in between. Therefore, the benefits obtained are reduced, and zero treatment has the following problems with the cooling circulating water: (1) The cooling water circulating flow is very large, and the amount of 0 paint required to reach the necessary 0 concentration is large. (2) The production cost is still high, and the continuous injection operation cost is high. (3) 0 has the characteristic of self-decomposition, and the excess amount cannot be reused in the circulation system ^ (4) 0 the ammonia body has the time required for the dissolution reaction, and the self-decomposed amount is also

Page 8 V. Description of the invention (6) As time increases, how to master the time limit to improve the utilization rate becomes an important key. (5) The water temperature and ρ Η value of the cooling circulating water can accelerate the self-decomposition rate of 0 3, which may reduce the effective utilization rate of 0. 3.0 Itching method At present, the reaction is selected in the cooling circulating water, and the gas phase enters the liquid phase, but it will fail because the bubbles in the liquid will rise to the surface of the liquid, and it will fail at the injection point. The pressure must be able to overcome the limitation of the back pressure of the liquid, so that the gas-liquid contact actually has a contact reaction effect only within the time and stroke of the 0 sen bubble rising from the bottom to the liquid surface, so its effect is limited. Two types: (1) Continuous injection can use a lower concentration of 0.3mg / 1 ~ 1. Omg / 1 continuous injection, which has the advantages of producing 0 Θ smaller device capacity, and can stop the problem at any time, the disadvantage is Daily injections are large. (2) The batch injection method is about twice a day, 15 minutes each time, and the concentration is about 1.0 mg / I, which has the advantage of lower operating costs, the disadvantage is that the capacity of the device generating 03 is large, and the warm-up time is wasted. More motivation. 4. 0 夂 injection point 0 The main considerations of the A injection point are (a) before the return water enters the cooling water tower, (b) after the cooling water tower collects the water and sends it to the process, and (c) the cooling water tower bottom tank is partially circulated. Water injection, which will be analyzed later, as for discontinuous fluid injection from cooling towers, or process cooling systems

-4 5 2 6 4 0 V. Description of the invention (7) Injection is not considered because of poor utility. (1) Injecting reflux water into the reflux water can be treated in the cooling water tower, so that the problems caused by the cooling water tower can be dealt with. It is a more effective injection location, but the temperature and pH of the return water are high. In order to increase the invalid self-decomposition rate, more 0 3 must be used. At present, there are few successful cases. (2) Injected into the bottom tank of the cooling water tower. Because it is a continuous fluid, the mixing reaction effect is better, and the water temperature and pH value are lower than the reflux water, so it can maintain a good utilization rate, but the cycle time is longer. When the process heat exchange device is at a high temperature, the dissolved 0 3 in the water may quickly decompose and fail, and the internal treatment of the cooling water tower is also difficult to maintain effectively. Therefore, this injection point is gradually not used, or it is used only in a few conditions. (3) Part of circulating water is injected at the bottom tank of the cooling water tower. This method is applied with the concept of 0 treatment in the swimming pool, that is, part of the water is pumped from the bottom tank as a bypass, which has storage. Water flows back into the bottom tank. Because the operation is simple and the technology is well-known, although the effect is still limited, most of them are mainly in this way. 5. Resistance and questioning of 0 cooling cooling water treatment Although the use of 0% cooling cooling water treatment in science and laboratory has been given a high evaluation in terms of 0% characteristics and effects, but in practical applications , Still exists in the technical and economic aspects

Page 10 V. Description of the invention (8) A lot of resistance and doubt, the key lies in the mastery of the self-decomposition characteristics and aging 'and the question of the corrosiveness and toxicity caused by the strong oxidizing power. Select general items for analysis: (I) 0 A injection amount 0 and the theoretical value required should be too far from the actual value. This is based on the fact that 0 is self-decomposed in the process of dissolution, contact and reaction, and becomes inefficient. 〇2 'makes the ratio of effective 〇 utilization low, so the cost is high, but if you improve the process parameters or operating conditions to increase the utilization rate of 0, the price to be paid is more considerable' 'so practical 〇 utilization The rate is less than half of the injection volume, that is, the zero swing of practical applications is often multiples of science. (2) Control of 0 itching rate. The reaction demand of A can generally be estimated. Even if there are variables in the water treatment process, the actual process parameters and operating conditions not only affect the solubility, contact, and reaction rate, but also It will also have a significant impact on the self-decomposition rate. Therefore, when theoretically estimating the injection amount of the table, once the process parameters and operating conditions have changed, the response rate of the crazy response will change greatly. In practice, it is not easy for those who can fully grasp these variables (including the time factor). Adding an excessive amount of ’not only increases the processing cost, but also causes problems of corrosion and poisoning. (3) Questions about the effect of the derivation of 〇Zan. The chemicals used in water treatment have not been as strong as oxidizing power and have only the characteristics of self-decomposition.

4 ο 2 6 4 Ο V. Description of the invention (9) During the process, problems that may be encountered will come out one after another, such as 0 watts of dissolved water in the exhaust gas _ 0 ring points, reaction associated gases and reaction products, etc. on the equipment and The human body may be corrosive and toxic, and the existing equipment and process conditions are applicable. These cognitions basically exist, but if the technical aspects cannot be properly overcome, doubts become a major resistance to adoption. Ⅳ. Discussion on the current treatment method of circulating water in cooling water towers. 0 The circulating water treatment for cooling water towers has more than ten years of history. It was only used by about 300 to 500 plants in the United States in 195. The original purpose is to focus on sterilization and algae replacement to replace chemicals (including chlorine gas, etc.), so when the traditional design uses 0 treatment, the filling method also follows the tradition. In the bottom tank of the cooling water tower, take part of the water as the Dissolved gas is homogeneous, and then dissolves 0 water back to the bottom tank of the cooling water tower. This method not only greatly reduces the function and effect of 0 images, but also reduces the treatment efficiency of circulating water. On the other hand, it also makes a lot of cooling water treatment processes. limit. From previous reports, it has been pointed out that although 0 is used for cooling water tower water treatment, there are many successful cases, and there are also many failure cases. In the failure cases, the manufacturer or supplier often blame the poor design, and 0 The quality of the occurrence device is not good. The fact that after recent product improvement and technical experience accumulation, it should be able to resolve the existing deficiencies. Unfortunately, due to its blind spots in traditional application technology, which cannot be broken, it has not been widely used in practice. Even if the current cases considered by manufacturers, suppliers, users, etc. are successful, if they are analyzed and evaluated, it will still be obvious.

Page 12 452640 V. Description of the invention G) It can be seen that only a small part of the spine energy is used. Although its return on investment is already very good, it is difficult to qualify as the "success" level, that is, There is still a lot of application space to be developed. Treating cooling water as a general purpose water treatment and performing 0 treatment is basically not appropriate. Although the appearance of the circulation process is almost similar, there are significant differences in the reaction mechanism, and 0 3 is regarded as a chemical drug. Substitute agents are even more strangling the advantages of 0 and highlight their weaknesses. How to coordinate and coordinate the two in order to make the most of their functions, we must review the methods and procedures of the company. The current process of cooling water towers treated with 0, as shown in Figure 1, its data source: FEDERAL TECHNOLOGY ALERTS, OZONE TREATMENT FOR COOLING TOWERS. 1.0 The practical limitation of the treatment method: The conventional method of circulating water treatment of cooling water towers, the problems and limitations that have been recognized so far include the following: A. Circulating water flow C 1) The water temperature must not be too high, If possible, it is lower than 丨 0 0 and below. (2) The lower the p Η value of the circulating water, the better β (3) The content of organic or inorganic matter that can be compatible with the product is low. (4) The hardness in water and the content of S. S. are low. (5) The cycle time cannot be too long (less than 10 minutes). (6) The processing flow should not be too large (under 10,000 gallons). (7) The water tower capacity and system water volume should not be too large. Β (8) The air quality near the water tower must be clean.

Page 丨 3 452640 V. Explanation of the invention (π) Β. 0 瘩 解 和 反应 (1) Gaseous 0 itchy solution in water, there must be appropriate operating conditions. (2) Sufficient concentration should be maintained before the contact between dissolved 0 and circulating water. (3) When circulating water returns to hot water to the top of the cooling water tower, there must be enough residual 0 concentration to complete the treatment of the cooling water tower for sterilization, algae killing and decontamination. (4) There must be a proper 0 addition rate (injection rate) to avoid excessive and insufficient. (5) The self-decomposition rate should be minimized. C. Other requirements U) The quality of the make-up water should be clean, low temperature and low pH. (2) The larger the concentration period, the better. (3) Corrosion should not be caused to pipelines and structures. (4) No scaling is desired. (5) The harm to human body is minimized. (6) The amount of discharged water is small, the water quality is improved, and no harmful or toxic substances are contained, which reduces the impact on the environment. (7) Minimize the manpower and power required for operation and maintenance. (8) The lack of existing processes must be improved to meet the needs of 0. 〇 2. Corrosion and scaling phenomenon 2.1 Corrosion is the surface of matter and materials in general concepts, and in some functions or anti-

Page 14 452640 Description of the Five 'Inventions (12) It should be collectively referred to as being gradually damaged or deteriorated. Although the reaction mechanisms are different, most of them have negative effects on substances and materials. (Except for some special uses). First of all, the reasons for its occurrence are briefly described as follows: (1) Erosion: The erosion caused by the friction of the fluid force may be generated by ordinary fluids or fluidized substances. Such as hydraulic flushing, air jet, etc. (2) Abrasion: It is the surface damage caused by friction when solid and solid are in close relative motion. For example, sharpening, sanding, etc. are all. (3) Dissolution: In certain soluble or reactive solutions, the contact surface is first affected and dissolved. For example, it can be produced in acid, salt or other solvents. (4) Corrosion: The surface of the object is deteriorated, deteriorated or detached due to the reaction conditions. For example, the rust of various metals is generally caused by oxidation reduction. (5) Corrosion: Because microorganisms inhabit material sources and materials, this material is used as a food source or nutrient base. As a result, the material is worn or deteriorated. Examples include ironophilic, phosphorophilic, sulfurophilic, nitrobacteria, and various microorganisms. (6) Electrolysis: The surface is ionized and separated or aggregated due to the movement of electrons. Examples include electrolysis, electroplating, cathodic corrosion prevention, or electrochemical reactions. Please note that there may be multiple interactions in the general process, so it is very

P.15 4 5 2 6 4 0 The degree of corrosion is the result. In addition to the motto's emphasis, the time-consuming rust removal using waterjet cutting and printing should be made impurities in time, commonly known as people, coating (some coatings caused by unnecessary unnecessary often in the process, mainly divided into the next five, description of the invention (13) It is difficult to clearly distinguish the reason. The reason is that the dripping water can penetrate the stone because of its great corrosion effect, so the factors can not be ignored. Corrosion is used for positive effect acid pickling, descaling salt washing, and circuit board etching etc. Both are controlled to prevent excessive erosion. 2.2 Fouling Fouling is the accumulation of a protective layer intentionally added on the solids), and the coating (1 i nn i ng) is troublesome, thus preventing fouling For the necessary treatment, there are several types of knots: (1) mineral solid particles (2) soluble solids are produced in certain (3) substances and structures (4) microorganisms are formed by structures. (5) Solid particles are generated by biological (6) van der potential (van product.) (7) It has a sticky substance or is formed, and another small and time-shaped corrosive ability must also be available, such as sandblasting, Anti-rust, but these positive effects cause damage. One layer is not the same as expected. For example, the difference in electricity and minerals. Scale often or descaling procedures, scale causes a lot of adhesion and accumulation. Dissolution and adhesion under conditions. Combination after reaction. Substrate (medium ) Dwelling, and the debris accumulated in the cement as a glue, resulting in stratification. Der waals), the attraction of particles and the existence of a solvent to bind.

Page 16 452640 V. Description of the invention (14) (8) External energy (such as heating) causes solid particles or dissolved solids to release and attach. In view of the above-mentioned mechanism of scaling, it is possible to reduce its formation by adding appropriate inhibitors. However, in many cases, the causes of scaling are not generated separately, but may be mixed and coexist. Therefore, the inhibitor also has its effectiveness limitation. After a period of time, it must still be descaled by physical or chemical methods. Similarly, the degree of scaling is related to the ability to scale and the elapsed time. 2.3 Correlation between corrosion and fouling (1) Corrosion and fouling seem to have opposite effects on the surface of fixed objects. Fouling can reduce corrosion and corrosion can remove fouling. In some conditions, it exists. . For example: pickling for rust removal, strong acid or salty for descaling. (2) Biological scaling may increase the corrosion effect, because it becomes a good medium and creates an environment conducive to biological growth, but also accelerates the corrosion in the scale and the surface of the medium, such as maintaining water, nutrients and solids. A biofilm. (3) Fouling provides protection against physical erosion, but uneven scaling may cause local accelerated corrosion. (4) Many scales are not fully covered, but are permeable, so they do not protect most corrosion effects. (5) Corrosion will damage the material, and scaling is also possible. The barrier formed by scaling is more likely to hinder the original function and effect. (6) Biological corrosion and structure must be removed as soon as possible, otherwise it will form

Page 452 640

_______—--------- V. Description of the Invention (15) Multiplication effect. 3. Existing problems The current reason is that the 0 祚 cooling water tower circulating water treatment has a low effect. Although 0 拃 is reported in the cooling water tower circulating treatment application, it is mostly positive and positive * but also There are many cases that point out that its limited benefits are not high. The reason for this may be the following: ^ '(1) Existing process conditions, equipment and operating methods' cannot be adapted. Play. '(2) The on-site environment is too harsh and damaging, resulting in inability to handle the equipment and smooth operation, and often fails. 'Sigh (3) There are many shortcomings in the current method adopted. It has a lot of shortcomings, which limits its use efficiency. ^ Xi, Mi (4) Set up. The estimated considerations before the period are insufficient, you are miscellaneous. Xinxing's actual (or existing) conditions are too wide, and the subsequent operations have failed to make appropriate adjustments to various changes β μ & '(5) The pre-period survey of the design unit, the data acquisition was not detailed, special # Insufficient ability, and lack of consideration for future management operations, operations, and maintenance, leading to the so-called improper design. (6) Purchasing focuses on equipment and equipment. The degree of technical ability and wisdom of KNOW HOW is rarely considered. Therefore, it is only focused on the setting of physical items (H a r d w a r e), but it is difficult to obtain the effect of functional technology (software). (7) The construction and supervisors themselves do not have sufficient professional knowledge, causing many defects and defects, affecting normal operation and efficiency, and often causing failures.

Page 18 45264 0 V. Description of the invention (16) Obstacles and damages and reduced durable life. (8) The operation camp was not implemented accurately, and the routine operation flowed into shape. For various kinds of silver, and η Λ, the changes could not be effectively responded to in a timely manner. (9) Insufficient special environment and cooperating equipment required for processing η and 1 f, the functional gap of μ, and & leads to the function of 乂, such as: cooling water, raw materials, gas 舻 ', and %% Provide environment. (1 0) For g M t 唆 operation, maintenance, management, and workload and difficulty 'can be comprehensively considered beforehand, and seek for countermeasures, guidance stations, ^, power, old force 4 双人 Wide η * Expense cost is unreasonable ° The current analysis is based on 〇. The problem analysis is based on the procedures and methods adopted by Wang Li's water tower, Wangli '. ^ The general circulating water, and the traditional concept of ○ treatment, & proposed bypass points I ^ r >, So. Xia (side stream by pass) even mackerel * ^ corner of the bottom of the water tower of the water tower ~ A treatment cooling: 倌 之 通 裎. In fact, the circulating water of the cooling water tower and-'Ye, breeding oil hall ~ β-stroke swimming number: its :: Yu ^ characteristics have a more significant impact, the following reasons for the difference of its heterogeneous number of analysis' will be easy to see. (1) The bottom tank of the cooling water tower is used as a place for the reaction. The path formed by the bottom tank is dissolved into 0. 'Refill the bottom tank of the cooling water tower'. It was originally expected that the reaction could be fully mixed in the bottom tank to cool the cooling cycle. The microbial lesions of the water system 'react adequately, but the bottom tank volume of the cooling water tower is usually limited. It is a confluence pool instead of a storage tank.' Dissolved in water,

45 26 4 0 V. The description of the invention (π) is the desire to fully mix the reaction and sufficient contact time to make it difficult. Most of the 03's that did not react in the bottom tank were pumped by the ring water pump and sent to the heat exchange via the cooling water pipeline. ≫ > Porosity rate in preparation 'Actually used for cooling water tower bottom tank reaction Low 0 (2) dissolved gas, like water, dissolves the water used by the 0 generator, passed from the cold head

waft vfrt ilC bottom tank water 'In fact, the quality of the water in the bottom tank, except for the return water after the water overflow is performed as a heat exchange (because it is dispersed through the cooling water tower), and other water quality conditions are similar or more unfavorable '(Evaporation of cooling water tower. Action, pH value, s · S concentration, Ma. As for reactants and contaminants increased by water tower washing and concentration) The degree of decomposition of gas will decrease, and the self-decomposition rate T Acceleration, on the other hand, due to the return of dissolved water, the bottom tank will spread and hope to spread, so that all the bottom tank can contact the reaction. There are high concentrations of dissolution. Residues, these residuals also affect the gas solubility. (3) The method of injecting gas into gas is the currently used method of dissolving ammonia. There are Dif fusor, Venturi and Jet or mechanical mixing methods. The method has the best effect, and it can achieve high concentration, and the fluid suction method has the lowest effect. Because of the limitation (LIQUID / GAS RATIO), the concentration of the solution is limited to a very low range, so the solubility is very low, and the cooling is used. water

Page 20 V. Description of the invention (18) The bottom tank water is a solution, the water quality is poor, the solubility is low, and it is easy to consume the dissolved 03 due to the reaction and self-decomposition. Therefore, the concentration of the dissolved 0 injected into the bottom tank is usually very low. Many laboratories and practices have proved that the efficacy at the same dose of 0 high concentration is lower, and the efficacy of concentration is several times. Therefore, the use of low-storage 0-spins is reduced. At present, due to the limitation of the process method, the 0-fluoride dissolution can only be achieved by the flow force (Venturi) method. (4) Although the target of 0 treatment is a continuous process during the cooling cycle, it can be divided into: cooling water transportation, equipment heat exchange heat absorption, reflux hot water transportation and cooling water tower. Except for the four parts of heat removal, except that the cooling water tower is open to the outside, the rest are flowing in a closed system. Therefore, the cooling water tower is used as the focus of various foreign objects and biological growth. General chemical treatment or introduction of 0 treatment, also the main focus of cooling water tower, especially the use of 0 treatment, the most important use is in sterilization, algae killing, the current 0 treatment method is only injected into the bottom tank, and then input into the system and return to the hot water It is almost impossible to have residual 0, so unless there is a sufficiently high concentration of dissolved 0 3, which can cope with the reaction loss and self-decomposition in the process, the cooling water tower from the top to the bottom tank, microorganisms, germs, biofilms, etc. are most likely to breed. However, the effect of zero treatment cannot be obtained, and it will continue to fall into the solid burden of the system. This is also the main reason why zero addition treatment must be continued when the current zero treatment of cooling water towers.

rA3J2 ^ JLQ _______ V. Description of the invention ¢ 19) C 5) 0 Use of treatment 0 is used to treat circulating water in cooling water towers. It is mainly used for the purpose of killing bacteria, microorganisms and biofilms. 'Apply ▼ the role of decolorization , Deodorization, descaling and degradation of COD are associated effects, and the purification effect of ordinary water treatment, such as reducing hardness, conductivity, SS, etc. are not their strengths, and may be interfering factors, even in general water treatment. The role they play is not in removing s, S, hardness, or COD. These are technically or economically considered. 'Most of them are processed by other methods. Due to the zero-inclusive reaction, its oxidation occurs simultaneously and is difficult to separate.' Therefore, in the usual way, its total consumption can only be regarded as the system's demand. However, if it can be characterized by zero, its dissolved concentration will decrease with time due to decomposition, and the decomposition rate will change with operating factors. The use of the object, the required concentration and the difference in contact time 'and the choice of the most suitable place in the circulation process can make 0 a reasonable high utilization rate. (6) Process parameter monitoring and 0 Xiang injection rate # The water tower generally does not require the use of highly purified water, and in actual operation, there are still day and night temperature differences, rain temperature differences, seasonal changes, and The phenomenon of physical invasion, biological growth, and evaporation and concentration cause various components of circulating water such as PH value, water temperature, minerals, solid dissolved matter, hardness, biological residues, scale accumulations, etc., often change, and when Each BLOWN DOWN, MAKE-UP water operation of CYCLE, and

Page 22 452640 V. Description of the invention (20) will cause great changes, which is a phenomenon not found in general circulating water systems. Measure various parameters of circulating water as the monitoring and control of injection 0 #. For example, some use ORP, pH, Tempe rature, Conductivity, residual dissolved 0 shore, as a control to control the amount of 0, it is difficult to achieve in practice. This is the result of following the traditional concept, and the "time" factor that has a very important impact on 0 3 is often ignored, which causes the problem of 0 main entry rate to appear and fail. So far, there is no appropriate response method. However, Because the circulation process has a homogenizing effect, and the dissolved 0 has a time-effectiveness, there should be a method that can simplify its operation control. (7) Bactericidal and algae killing effect. After the sun dissolves in water, it forms hydroxide radicals, the oxidation-reduction potential rises greatly, and the bactericidal and algae killing ability also improves. 0 # For sterilization, no matter the reaction mechanism is to destroy the cell membrane or The inhibition of gene growth is covered by the word "inactivation". Generally, when the degree of inactivation reaches 99.9%, it is regarded as complete sterilization. For inactivation of living organisms, it depends on biological objects, categories, and body types. The difference is generally based on the concentration X time (CT value). In the concentration X time, the concentration is from the lower limit concentration with "inactivation" to the upper limit of complete sterilization. The concentration is too low to be sterilized. It is impossible to accelerate the sterilization if the concentration is too high, which is different from the general disinfectant with the dosage. It is learned from the actual operation of the cooling water tower that under normal conditions, if the dissolved 0 3 concentration is 0.1 mg / 1, it will reach 80% killing after 3 hours.

Page 23 ^ 45 26 4 0 V. Description of the invention (21) Bacterial effect, inferred from CT value CT1: 0.4mg / l X 3min = 1.2mg / l-minl00% CT2: O.ling / 1 x 180min = 1 8mg / 1-min 8 0% It can be seen that when the dissolved 0 concentration is 0.1 mg / 1, it is at the edge of the lower limit of the effective concentration, so the effect is not large and the time is prolonged, and if the dissolved 0 concentration is increased to 0.4 mg / 1 At the time, the bactericidal effect was significantly increased. According to the results of laboratory tests, taking coliform as an example, the lower limit of the effective concentration is 0. 0mg / I, the upper limit is about 0.5 2mg / l, and the general drinking water is bactericidal. When the concentration is 0, the concentration is about 0.3 to 0.5 mg / 1, and the contact time is about 6 minutes. In fact, the higher the concentration, the shorter the time can be shortened to seconds. Please note that the so-called time here refers to the contact time. , Not hydraulic retention time. From the above analysis, it is known that if the concentration of dissolved 0 is too low, the effect is limited, and if the concentration of dissolved 0 can be 100% inactivated, and then injected into the aseptic to kill, forming the dissolved 0 concentration to maintain the equilibrium value, Facing difficult decisions. (8) Corrosion effect 0 is a strong oxidant, which will produce oxidative corrosion effect on some materials. This is a fact of existence. Therefore, in the general concept, 0-resistant materials must be considered when contacting 0 potassium, but generally so-called The degree of corrosion is related to the ability to corrode with the contact time. The low-concentration corrosive agent is exposed for a long time, or the high-concentration corrosive agent is exposed for a short time. The degree of corrosion is limited. For example, high concentrations of strong acids and alkalis are commonly used. As a material

Page 24 452640 V. Description of the invention (22) The purpose of rust and scale removal is the positive effect of corrosion in short-term contact. In the circulation process of the cooling water tower, based on different functions and efficiency, there are different materials to choose from, such as cooling water towers, heat exchangers, pipeline pumps, etc., because the cooling water towers are exchanged, the dripping water drops have a high The effect of aeration and dissolved oxygen, so when designing cooling water tower systems, the oxidizing power of dissolved oxygen has usually been taken into account. Chemical agents with a high degree of oxidizing power may exceed the material tolerance range, and are excluded from use. In this way, not to mention that the oxidizing power of ozone is stronger than that of air, so when using 0 treatment, the problem of corrosion of materials can be understood. Many circulating cooling water tower cooling water treatments show no significant difference in corrosion degree compared with common chemicals and have the positive effect of scrubbing and scaling. It is considered that the treatment of cooling water tower systems does not cause corrosion. The fact is that the residual dissolved O concentration is very low, which is only enough to remove the surface scale. Due to the high reactivity and self-decomposition characteristics of 0 in the environment of circulating water in the cooling water tower, the concentration of dissolved 0 will drop sharply in a very short period of time, especially after heating up by the heat exchanger, the self-decomposition will accelerate (for every 1 0 ° C approximately doubled), so the 0 manufacturers pointed out that the circulation process should not exceed 10 minutes, and if there is a residual dissolved 0 concentration, the concentration of the previous process must be greatly increased, so not only The injection has greatly increased the demand, and it will also cause severe corrosion to the previous process.

Page 25 452640 V. Description of the invention (23) This is the reason why there are restrictions on material selection and process cycle time in current methods. In terms of 0 < characteristics and degree of corrosion, "time" has become an important operational key, so if you can choose the relative demand to dissolve 0 concentration in the process, and cooperate with the process time, injection location and contact time, you can get a reasonable Prevents corrosion and reduces the amount required. (9) The descaling effect 0 itself is not an inhibitor (丨 11} 1 to & 1: 〇1 ') nor a descaling agent. In many long-term reports, it is pointed out that after using 0 to treat the circulating water of the cooling water tower, The scaling phenomenon is significantly reduced, and some cases further point out that the surface of the material is as clean as re-brushing, so it is often regarded as one of the important benefits of 0 treatment, but it is not always the case. 0 has a strong ability to kill microorganisms. Therefore, if the surface is scaled and the biofilm cement is used as the adhesive, the biofilm will be killed and the cement will be oxidized, losing its adhesion, and will naturally detach from the surface. Some scale materials can be decomposed due to oxidation to form soluble oxides, and some materials are consumed by 0%, such as iron, fierce, and other scales. Therefore, formula 0 is the main factor for descaling. The extension effect of the reaction, the effect obtained indirectly, but it must be noted that descaling is closely related to corrosion, and good descaling effects are often accompanied by corrosion, especially to maintain the solubility above a certain concentration. In the previous process, Dissolved 0 concentration

Page 26 452640 V. The description of the invention (24) must be very high. In this case, the test of the material in the previous process will corrode the surface. How to hold it properly is a technical difficulty.

Q here again reminds me that the table descaling mechanism 'reaction increases at high concentrations, and the time required is very short, so if it is used with the property of self-decomposition of 0', it is expected to reduce corrosion and reduce the amount required. Can achieve. C1 0) human safety # 〇 has a strong biocidal ability, although it is not a poison, but it is still a harmful toxic substance, which has always been concerned by users. Generally, the dose in the air exposed for 8 hours is used as a safety indicator. At 0 degrees 0.2 ppmVol, there will be no feeling. '〇 When the concentration exceeds 0.2ppmVol to 0.5ppmVol', it can smell irritating, but it is still harmless, and at 0 concentration exceeding 0.5 PPm Vol to 30 ppm. For Vo 1, it is a temporary harmful effect. 'If the concentration of 〇3 exceeds 30ppmVol to 400ppmVol, permanent damage will occur. As for the lethal concentration of 0, it is above 400 ppm V0l. Please note that these concentrations are based on the content of 0% of air from the source of diffusion and dilution through the air, and the distance of personnel from the source, The actual inhalable dose is much lower than this value. In terms of contact time, when people can smell 0 irritating and harmless areas, i minutes are e ^ 30 0ppmVol within 10 minutes is 50ppm Vo is actually more than family gas More secure.

Page 27 452640 V. Description of the invention (25) In the United States and Japan, the limit of 0 concentration in the air is less than 0.1 ppm. When there is an excess, it is decomposed, or the 0 generator is stopped. Currently, cooling is used. The treatment of water tower 0 is continuous injection, and the allowable concentration is low, and there is no problem because the addition amount is small. However, even if the high concentration of 0 3 is injected, as long as the contact time is short or the personnel is far away from the source, there are no safety concerns. 0 itself is not explosive, and the explosive concentration mixed with the probable gas ranges from 20 to 100 wt%, which is actually more than 48 wt%, but no matter what the value is, it exceeds the maximum limit of the current 0 generating device. Above the concentration, there is no such concern. [Objective and Summary of the Invention] The object of the present invention is to provide an ozone treatment system for circulating water in a cooling water tower with a low cost and high utilization rate. In order to achieve the above object, the present invention changes the auxiliary system of the conventional cooling water tower, and uses a supplementary water to add a neutralizing agent to dissolve ozone gas into high-concentration ozone water. The high-concentration ozone water is injected from the top of the cooling water tower to Disinfection, sterilization and algae elimination are performed. During the ozone cooling water tower treatment, the reflux water is bypassed as a backwash water required for the sand filter tank. As 〇 is the only one with the characteristics of self-decomposition, 〇3 dissolved in water decomposes faster, and the pH, temperature, and time all have a great influence on the self-decomposition. The operation method is different, otherwise it will cause a high proportion of self-decomposition loss, so currently there are patents for various 0 A application methods. Because the efficiency utilization rate of 0 3 by different construction methods may differ by thousands of times, this construction method is based on the current cold _ 111 ill 111 page 28 452640 V. Description of the invention (26) However, the treatment of circulating water system 0 is the object. It is estimated that the cost of 0: f is still expensive, and its efficiency can be dozens of times higher than that of the traditional 0 processing method. [Brief description of the drawings] For those skilled in the art, the present invention will be more clearly understood from the detailed descriptions and accompanying drawings made below, and its various purposes and advantages will become more apparent. Description of drawing number: 10 Cooling water tower 12 Bottom tank of cooling water tower 14 Sand filter tank 16 Water pump 18 Process equipment 20 Dissolving tank 22 Ozone decomposition device [Detailed description] The traditional cooling circulating water system is shown in Figure 2. The main system cooling circulating water The cooling water tower 10 exchanges heat with the atmosphere, collects it in the bottom tank 12, and then passes through the sand filter tank 14 to remove the solids, and then sends it to the process equipment (heat exchanger) 18 by the pressure pump 16. As the cooling water, the temperature rises through the heat exchange of the equipment, and the return water enters from the top of the cooling water tower 10. In order to promote air convection to facilitate the heat exchange in the cooling water tower, a fan (not shown) is usually provided to extract air. In the secondary system, supplemental water is used to replenish the amount of water lost due to evaporation loss, discharge loss, and sand washing and drainage loss. A neutralizing agent is injected to increase the pH of the cooled circulating water due to evaporation, and is usually an acid agent. Disinfectants are used to sterilize and algae to maintain water quality and safety, and to suppress odors caused by microbial growth and obstruct the flow path. Drainage water is discharged through a drain (not shown)

Page 29 45 ^ 640 5. Description of the invention (27) It is generally stated that in order to avoid excessive electric conductivity to form wall scale, hinder the flow path and heat exchange effect, at the upper limit, a part of the water is discharged and diluted with supplemental water. Finally, the waste water from the sand washing (sand washing waste water) is discharged from the sand filter tank 14, and the sand filter tank 14 is filled with backwash water through the pressure water pipe (not shown) for the backwash of the sand bed. After a certain period of filtration, when the head loss is too large, a backwash is performed. Due to the consideration of many reasons, the disinfectant-gas often used in the past has been gradually stopped. Other alternative disinfectants are not yet suitable. Recently, the number of people who use 0 to treat cooling circulating water is increasing, but 0 3 will decompose on its own. The main obstacles are the absence of residual accumulation and the high cost. When using 0 as a disinfectant, 0 is lacking, so it is a source of major microorganisms. When disinfecting, sterilizing, and algae killing, the injection port must be on the top of the cooling water tower, and the return water inlet is effective. The running water temperature and pH are both high, and the content of impure reactants is high, which increases the amount of ozone required, which has become the biggest difficulty at present. The method and problems of using the cooling water tower bottom tank injection have been described previously, and will not be repeated here. The present invention is shown in Fig. 3, please compare it with Fig. 2. The processes of its main system remain unchanged. In the secondary system process, supplementary water, neutralizer, and gas are introduced into the dissolution tank 20 to dissolve into high-concentration 0 ice, and then injected from the top of the cooling water tower 10 to sterilize and sterilize and kill algae. High-concentration 0 3 water The injection method is based on the requirements of the processing site in the cooling cycle system, divided into sections, and the appropriate amount is injected sequentially in a return-type manner. Another different point is the use of reflux water as the backwash water of the sand filter tank 14. During the processing of the cooling water tower, the circulating return water is isolated by side flow, and it flows into the sand filter tank 14 instead.

Page 30 452640 V. Description of the invention (28) It is the backwash water, so the discharged wastewater has both BLOW DOWN and sand washing wastewater, which reduces the amount of water used and drainage. The ozone-decomposing device 2 2 is provided in some special occasions to protect the process equipment 18 from 0 corrosion. In addition, the sand filter tank 14 can be formed by laying sand particles in the bottom tank of the cooling water tower. Now, the zero-treatment and sand-bed cleaning procedures of the present invention are listed in detail to enable a better understanding of the semi-offline return-type ozone water treatment method of the present invention. First assume that the system is equipped with a fan exhaust. 1. Preparation for treatment and cleaning (1) Acid injection, 0 equipment startup. (2) The dissolution tank 20 starts to dissolve 0 gas, and the concentration increases. 2. Start of treatment and cleaning (1) The cooling water tower 10 flows in, and the return water is switched to 0 treatment water, and the return water is shared by the cooling water tower of the BY-PASS pipeline or other units. (2) After the supplementary water is turned on and enters the 0 槔 solution tank, 0 water is made to flow into the cold water tower 10. (3) The cooling tower fan stops. 3.0 Processing Stop (1) Turn off the OZONE generator. (2) Make-up water continues to flow. (3) The fan is enabled. 4. Start of backwash Π) Makeup water is stopped, drainage is turned on, and backwash water (backwash water) is turned on

P. 31 w ^ 6 4 〇 V. Description of the invention (29) Kai. (2) Β Υ-P A S S is switched back and the inflow is switched to reflux water. 5. Washing is completed. Close the backwash, and drain the outflow. 6. The biofilm begins to grow. After washing, the biofilm starts from the beginning and undergoes a micro-biotreatment period to the next cycle. If only from the surface of the system process, it is difficult to understand the existence of its functional characteristics, but if it is used for the characteristics of zero bombardment, it can be applied to the needs of many functions, especially for increasing solubility, reaction efficiency, inhibiting self-decomposition, and reducing consumption. Side 0: It is very helpful in other aspects, so it has a close relationship with the operation, which will be explained separately below. 1. When high concentration 0 water is used to treat the lesion of the cooling circulating water system, the cooling water tower 10, and 0, the 0 must be able to make full contact with the attachments in the cooling water tower 10 and the nourishing organisms at the bottom manifold 12 to have Efficiency, because the cooling water tower 10 is a non-continuous flow of free fall, so the inflow contains zero hot water, which must be injected through the original flow path, that is, the outlet of the return water is the inlet of the cooling water tower. It is unfortunate that the return water outlet is the most unfavorable place in the cooling circulation system for the reaction conditions of 0 contact, so the effect is very low, and it becomes an important reason for the uneconomical use of 0. Disadvantages for dissolving gas phase 0 in water are high PΗ value, high temperature, high content of consumed 0 objects, insufficient water depth for 0 ammonia bubble contact stroke, and insufficient time to form hydroxyl radicals. High pH and high temperature will promote the self-decomposition of 〇3. If there is not enough water depth and dissolution time, 0 will be discharged in the bubble.

Page 32 • 45 26 4 0 V. Description of the invention (30) The liquid surface overflow cannot be fully utilized. These factors are the upper limit of the system in the return water. Under the condition that the injection point cannot be changed, explore whether it is feasible to change the ownership of the return water. The answer is no, because a higher price is required. The invention adopts make-up water, which is indispensable for the cooling circulation system, as a high-concentration 0-water, in addition to the low temperature and cleanness of the make-up water, and in accordance with the needs of the system, the acidifier used for neutralization It is used intensively to reduce pH during 0 water treatment. Because the high-concentration 0-ice processing time is short and the flow rate is low, it is easy to create a variety of conditions that are favorable for the dissolution and the generation of hydroxyl radicals. The high-concentration 0-water containing a high proportion of hydroxyl radicals is introduced into a contact dissolution tank, and supplemental water, an acid agent, and 0-ammonia are introduced. The contact is dissolved at a sufficient depth and residence time, and reacts with water to form a high concentration. The redox potential of the hydrogen and oxygen radicals is immediately injected into a cooling water tower for processing. Because the high-concentration 0 拃 treatment, the contact reaction is also carried out in the form of a free-falling drop. Therefore, the lower flow limit of the water can be used. Generally speaking, it is about 15% to 20% of the circulating water flow. The supplementary water used for treatment is only about 10 minutes. For the total amount of daily supplementary water required, the proportion is very low, so the amount of water is acceptable. The acidifying agent required to neutralize the cooling cycle water can be estimated or empirically obtained. Because the cooling water is a circulating system, the neutralizing agent can be injected into the system centrally. If only a small amount of supplementary water is used as the object, the neutralizing agent is neutralized. And acid will reduce its pH value a lot, which does not need to increase the burden on the system, and only the neutralizing acid is first introduced into the make-up water for use, it is not consumed, basically

Page 33 452640 V. Description of the invention (31) No problem. The gas phase 0 rises in the form of bubbles in water, and dissolves and reacts with water in contact with the water during the upward floating process. The efficiency of the water depth is about 4-5 μm when using a general air dispersing device. The time required for the contact dissolution process is between 1 and 3 Μ Ν. Because the flow of dissolved water is not large, the volume of the tank needs to be limited. With the necessary water depth, a cylindrical dissolution tank can be designed, or mechanically The centrifugal dissolution method is used to increase the concentration of 0 water. From the above analysis, a high concentration of 0 ice containing a high proportion of hydroxyl radicals is produced. As long as the existing facilities are introduced into the dissolution tank 20, the reaction with 0 fluoride is performed first, and then the deployment operation is performed. The method can be easily formed, but the high-concentration 0-water not only accelerates the reaction rate, but also reduces the demand, especially because the flow rate is reduced, the equipment pipeline capacity is reduced, which is highly feasible technically and economically = 2 In the high-concentration 0-water injection method, in the cooling circulating water process, the cooling unit of the cooling water tower 10 is an open space, and many pollutants and microorganisms enter the system from here. The environment is particularly suitable for the growth of obstacles, such as the growth of bacteria, algae, biofilms, and the accumulation of sediments, attachments, etc., to form medically known lesions. Therefore, when the zero treatment is lacking, Since the cooling water tower 10 is the main object, that is, 0 夂 injection, it must be upstream of or inside the cooling water tower 10. Due to the liquid flow path in the cooling water tower 10, due to the need for heat dissipation, the fluid is dispersed into It is granular and falls as a free-fall body. It is a discontinuous fluid. Therefore, 0 3 of the gas phase is injected into the cooling water tower 10, and it is difficult to have a good contact reaction. Most of them may be forced out with convection air.

Page 34 4 5 2 b '4 〇 V. Description of the invention (32) The confluence at the bottom of the cooling water tower 10 is low, and it is located in the downstream' no response '. In the return water flow process, you can find the exit of the combined return water in the process, which is close to its large flow and short distance. Even if the hydraulic stop has a water diversion channel, the water depth and time in the water are very short, plus the return water. The water temperature and pH value should promote the cleavage rate component of 〇3, and some of the dissolved bottom tank 12 will also be used to a limited depth. The method of dissolving 〇 > into the upper cooling water tower 10 ^ 'is why Cooling tower 1 0 0 0 ticks' This is not the same as the normal injection point of non-zero treatment. At the inlet above the cooling water tower 10, the retention time is usually measured in seconds, and the return water is very limited, so that the percentage of air bubbles staying in the gas 0 to dissolve is low and high, which is not conducive to the dissolution of argon. 'Additionally' various kinds of O3 contained in the return water, so as to reduce the loss in the cooling water tower 10 and zero buckle loss' are not affected by changes in the return water parameters. The 0-degree after-treatment water treatment method, which is a conventional gas-phase injection method, is actually not applicable to the treatment flow of a discontinuous flow such as a cooling water tower 1 0 '. 〇 Water injection method is to completely abandon the above-mentioned gas injection process. Instead, the gas phase 0 is converted into fluidized dissolved water in advance by the pre-equipment, and then injected into the cooling water tower with the same water treatment to operate, so its contact reaction The same 'same as the original circulating water' enables the high concentration of 0 3 water in the cooling water tower 10 to be treated 'and there will be no shortage of gas phase into the return water. The water is injected into the cooling water tower 10, except for Except for the contact reaction with attachments, other losses are small, so it can maintain a high degree of certainty above a certain level. It can fully exert its sterilization, thinning, and promote the shedding of biofilms and attachments.

45 ^ 640 V. Description of the invention (33) 3 · 0 of the cooling water tower's confluence bottom tank handles the water drops falling from the cooling water tower 10, and the bottom of the cooling water tower 10 is usually equipped with a confluence bottom tank 12 to facilitate the pump 1 6 Extraction and pressure, and then sent to the process for cooling, because the confluence bottom tank 12 is converted from a discontinuous water body to a continuous fluid, so its hydraulics is the same as that of a general continuous fluid. The water dripping through the cooling water tower 10 is a place where various substances gather. Therefore, the bottom tank 12 of the cooling water tower 10 often becomes a breeding ground for microorganisms, bacteria, and algae. It is also another focus of the cooling circulation system. Because of the discontinuous flow contact reaction in the tower 10, the consumption of 0 is not large (short time, sterilization, algae consumption 0 side: small), so there is still a relatively high concentration of 0 water, so 0 Water is used as a continuous fluid contact reaction of the bottom of the tank, and is stirred and homogenized under the action of the flow force, so that the bottom tank 12 can obtain a good 0 treatment effect. The bottom tank 12 is a continuous fluid and has a long residence time. Therefore, various reaction mechanisms may be performed to reduce the concentration of effluent water 0. In addition, in a plurality of cooling water towers 10 operating in parallel, when a single tower is treated with 0 water, the effluent water is caused by After mixing with other towers and diluting or reacting with other ingredients, it can reduce its 0 concentration, basically until the pump 16 or the cooling water sent to the process, which has a low concentration of 0, and due to subsequent reactions and self-decomposition, Reduce the 0 concentration even more. 4. Dispensing 0 ice by section · In the cooling water tower 10 cycle flow, there are places that need to be treated with 0 and sections suitable for 0 reaction, and a large cooling circulating water system often contains multiple equipment , Such as cooling water towers, freezers, condensers and heat exchangers, etc., because 0 3 will decompose and react on its own, high concentration of solvent

P.36 45264〇1 ----- V. Description of the invention (34) 扃 〇 扃 Causes corrosion damage 'and accelerated decomposition, and each component in the system _ -W Ⅰ,' / U t -Ιψ — two products in the place Feng You's needs are different in the use and degree of treatment, so it is inappropriate and meaningless to take the residual pain level with the amount of music. Passing and washing places that require 0 treatments, the required 0 treatment concentration is the standard, and according to the operating conditions of the interval, the injection of 0 production can be compared, the effect is economical, and it is also self-decomposed by the 0 speed Effect, to avoid excessive residual accumulation of 0 meters, and cause damage to the system. In order to make the 0 treatment effective, not to cause excessive corrosion, and economic cost considerations, the value of 0 3 'can be set in a retrospective way to set the value in multiple devices. In the system, you can use sequential operations and processing to reduce the capacity of the generating device. With the above-mentioned 0-water re-dispensing treatment according to the location and sector, the problems of excessively long circulation flow time, multi-purpose use of most water towers and heat exchangers, and excessive capacity (10,000 gal) can be solved. The following is an example to explain the following: (1) The amount of 0 in each place: In the cooling water tower circulation system, the zero value of each reference point must be adjusted according to the water quality. The range of the zero value of the preferred embodiment is as follows: Show: Dissolve at each material point. 05 value, bottom eaves, smelly dry water ii. 0 ^ ppm-1.5ppm. Slots are O.G25ppmO25ppm, slanted by wooden port 0.075ρρπΗ). 15ppm heat exchanger inlet 0.04ppmO_08ppm (Scatter reduction 0.010ppnK) .04ppm

Page 37 V. Description of the invention (35) According to the technical discussion with China Iron and Steel Corporation and Winbond Electronics Corporation, 'think that moss and algae have formed to a visible level for about 3-5 days'. Therefore, if the return water can enter the cooling tower every day, At the top, 'spray at a high concentration for a short period of time, then the accumulated scale and algae spores can be removed in the early stage when this bottleneck can be resolved. ~ Generally, a 0 ~ 5 ppm concentration of 0 water is used for about a cycle. The injection can reduce the fouling phenomenon of the whole system. Due to the short-term corrosiveness, it will not cause cumulative damage to the pipeline material. Therefore, even if a short-term excess is selected, it will not cause serious corrosiveness caused by long-term effects, let alone 0 Feng's own decomposition There is no residual accumulation, so it is more suitable to use 0 as the treatment method. (2) Cooling water volume: The water volume of the cooling water tower treated with 0 refers to the system water volume, which is injected by using the existing bypass method. When the system water volume is 20000 gallons, it will take about 7 kg per day. The offline batch injection method is used to quadruple the amount of itching once a day for about 10-30 minutes, and the demand for removing scale and algae can be achieved. In contrast, continuous injection at 80% usually requires 0 edges: 70Kgx 80% = 5. 6kg ... (ι) 7kgx 400% xl / 24x 1/2 = 0.6kg ... (2) Consumption of 0 sides per day = (1) + (2) = 6. 2kg < 7.0kg [saving 0 supply compared with the current bypass method] Other related cooling water 'is based on system demand conditions,

Page 38 4 5 2 6 4 〇 V. Description of the invention (36) For example, the cycle period, heat exchange rate, temperature difference, etc. vary depending on the environmental situation β (3) Backwash water volume: Because the cooling circulating water is a closed circuit system, The pollutants in the system are cumulative. Blow down and supplemental water are used to reduce the concentration of solids and conductivity in the system. Therefore, the amount of Blow down water is based on the conductivity in the system as an indicator, that is, the concentration cycle. Generally speaking, 'the closed-loop system requires a longer backwash cycle than the open-circuit filter tank, that is, it takes longer to break through and leak.' Currently, B 1 0w down water is used as a backwash sand filter tank, so it does not cause Requires additional backwash water. The author himself has domestic and foreign tap water purification plants, and the sewage water treatment plants have "experience with many filtration tanks". The backwash water is filtered according to the filtering method (upward flow or downward flow). The filter material is "washing method." There are discrepancies, which are not fixed values. During the backwash process, the amount of backwash water is 5 to 丨 0 times that of the transitional flow. However, this method is enough to discharge the secondary use of water, so it is not necessary to consider the water in the crossing. Loss situation ', and the total amount of Blow down water is used as the backwash water for the aqueduct. (4) Temperatures in various places: The cooling water use' heat absorption and temperature increase through heat exchange to the highest value, which can be reflected at the return water outlet 'will cause Circulating flow rate, heat exchanger temperature and heat conduction change, it is best to be lower than Π 5 ° F in the treatment system.

Page 39 4 5 2 64 0 V. Description of the invention U7) It is related to air temperature and cooling tower efficiency. Generally, the atmospheric temperature is the lower limit. For 0 rain words, the water temperature cooling capacity is related. Experience shows that for each additional cooling ton 1 ppm must be increased by 0 ticks ° In the system, the temperature of the outlet of the pump is slightly increased due to mechanical heat dissipation, and the temperature of the water is slightly reduced due to the heat released by the gas, but the impact is limited and often ignored. Therefore, the cooling system uses The inflow and outflow of the water tower, and the water temperature at the inlet and outlet of the heat exchanger are the more obvious boundaries. These two have been estimated in the system design and must be corrected in actual operation. Not every system is fixed. The value is not the same every time. In 5.0 biological membrane filtration and bed cooling circulation system, there is an open space at 10 of the cooling water tower, and foreign objects are inevitably involved. Organic matter and microorganisms are combined to breed and produce a biochemical reaction, which has positive significance for water purification. However, the massive solids produced by biofilms and algae debris often become obstacles to the cooling system flow path, affecting normal operation and becoming a headache. Because the cooling circulating water is not a completely closed system, foreign objects involved in the build-up or the debris of microorganisms and algae must be removed. Therefore, in the cooling circulating water system, filtering equipment is usually provided, but the filtering equipment is only suitable for screening. Large solids have low functions for small and dissolved substances, and are not suitable for medicinal flocculation due to cooling circulating water, which usually has limited purification effect on water quality. When the circulating water causes the component concentration to rise due to the evaporation of water, or the accumulation of foreign substances causes the water quality to reach a certain limit, it must be discharged.

Page 40 452640 V. Description of the invention (38) The replacement of clean water will increase water consumption. According to the above analysis, if it can produce biochemical effects in the cooling and circulating water system, it will be quite helpful for water purification, but the main key is that it cannot make microorganisms and algae grow excessively, and the debris must be removed outside the system to achieve. . In traditional disinfectants, if you want to sterilize and kill algae in a short time, you must use a higher dose, but because of the short cycle of the cooling cycle (several minutes to ten minutes), the residual disinfectant will still return to the microorganisms. The source of the effect can inhibit the growth of microorganisms, and cannot receive the effect of biological treatment. However, if the disinfection dose is insufficient, the algae cannot be completely disinfected, and macroliths may be formed, which will harm the process of the cooling circulation system and it is difficult to achieve the best of both worlds. . The use of ozone for disinfection, sterilization, and algae killing has its effectiveness, but the cost is high. In addition to 〇 拃 for disinfection, sterilization, and algae killing, this method also has 0 A self-decomposition characteristics, which is beneficial for biological treatment. The mechanism. The method is to use sand pools 12 or water collecting channels at the bottom of the tower to spread sand grains to form a filter bed, or to directly carry out the sand filtration unit 14 after the cooling water tower, and then use the sand grains as a biofilm medium to form a biological filter bed. Microorganisms grow on the surface of medium sand and naturally produce a purification effect. After a period of time, when the biofilm grows to a certain thickness, it kills the microorganisms and oxidizes the biofilm with 0, destroys its cement, and forces it to detach from the surface of the medium. The biofilm and sand bed sieve are removed and discharged by backwashing with clean water. After the 0 treatment is stopped, the biofilm action starts to grow again, so in this cycle, the biological purification effect can be achieved. Because 0 sterilization, algae killing and oxidizing power are very strong, high concentration ο β can reduce its reaction time, so using high concentration 0 樵 for short time sterilization, it is possible

Page 41 462640 V. Description of the invention (39) There is a high concentration of residues. 0 Crazy, but after dilution in water, the reactants take another long time to decompose on their own, and in the process of high temperature decomposition, there is almost no residue in the reflux water. 3. Generally, the biofilm is shed, because the biofilm is thickened, it is decomposed by the internal anaerobic bacteria, which reduces the adhesion of the biofilm and the cement, and then it is peeled off by gravity or fluid force, but it must go through the anaerobic digestion process. The time is long, the volume is large, and it is not easy to grasp. The purpose of using 0 treatment is to destroy the biological activity, and to oxidize and decompose the cement, so that its adhesion is forcibly reduced and detached in a short time, without relying on the growth of the biofilm. Therefore, no excessively large volume of falling debris is formed. In general, the growth of biofilms has not reached a harmful level within a few days, and so is algae. Therefore, if a period of several days is used for 0 treatment and sand layer cleaning, and then restarted, it will not form an obstacle to the system. During this period, the biological purification effect can be used. 6. Decompose the residual dissolved ozone, protect the equipment from corrosion. Ozone is a strong oxide, which will disappear due to the reaction, self-decomposition and disappear, disappear due to the rapid chain reaction of hydroxyl radicals, and it can also be caused by pyrolysis and catalyst reaction. , Activated carbon adsorption or UV destruction and forced disappearance. Based on this characteristic, for some process equipment to avoid zero corrosion, you can use the ozone decomposition device 22 and other methods to resolve, that is, when necessary, you can borrow Due to these measures, the dissolved 0 concentration is greatly reduced to a safe value, which is a special application that is difficult to achieve by other chemicals. Furthermore, the technology of the present invention is further explained.

1. pH 452640 in ozone water V. Description of the invention (40) The dissolution rate and saturation dissolution rate of ozone are better with a low P 丨 丨 value, and hydrogen radicals are also more likely to exist in acidic solutions. Conversely, 0 3 self-decomposes The rate 'logarithmically increases with the rise of pH value', so the solution is dissolved and hydrolyzed at 0 celsius, and its pH should preferably be low during the reaction. 'Because the pH value of the cooling water is at high temperature,' the acidic components are prone to form gas overflows', so it is high plHt, which must be neutralized over time. Use make-up water to adjust its pH value drop 'because its water volume is only about 5%-10% of the circulation system, and water purification, reducing 1) 11 value, less acid doses must be added, and after injection into the circulation process' can be linked with It turns out that the circulating water is mixed and neutralized, and there is no need to make continuous injection adjustments, so it is feasible. Usually the acid test required for neutralization = pH concentration X flow. For circulating water and the required acid-base flow rate: (when ρ Η = 8) 4 times XQ c (Q c: cooling water circulation flow rate) For make-up water to reduce PW acid flow: (p Η = 5) 8 times XQ m (Q πι: make-up water flow) Because Qc is about 10-20 times of Qm, even when the pH value of make-up water is reduced to 5, the amount of acid required is still lower than the amount of acid required to neutralize the pH of the circulating cooling water 'Basically still feasible. At low pH, the ozone water has a higher dissolution rate, saturation concentration, and the proportion of oxygen radicals that are combined. On the contrary, the 03 self-decomposition rate decreases, and high-concentration, high-efficiency 0 water can be formed in a short time. 2. Water temperature in ozone water Water temperature has a dissolution 0 3, saturation 0 concentration and the formation of hydrogen and oxygen radicals ’decreases with increasing temperature, on the contrary, 0A self-decomposition rate’ increases with temperature

P.43 452640 V. Explanation of the invention (41) It is accelerated. According to the empirical evidence, the self-decomposition rate doubles for every 10 ° C increase in temperature. The temperature of the reflux water in the cooling cycle is usually 50 ° C-7 Between 0 ° C, it is extremely detrimental to 0. Generally, the temperature of the supplementary water is about 15 ° C to 25 ° C. Therefore, the effect of 0 in the supplementary water and 0 in the circulating reflux water Compared with the wiping effect, it is also several times. Because the flow of returning circulating water is large, cooling is not easy, and the cost is high, it is usually not considered as cooling. However, in terms of the amount of make-up water, only And the amount of circulating water is 5% -10%, even if the temperature is reduced, the energy cost is relatively reduced. 3.0 When reacting substances in water are decomposed and reacted with water, in addition to self-decomposition, there is still a need to consume 0 reeds due to the reaction. These reaction objects vary in composition and concentration, which is difficult. Master, for the purpose of use, the zero treatment of cooling circulating water is mainly for sterilization and algae killing. It must maintain a dose of a certain concentration or higher to have an effect, and it can reduce its contact time to seconds. Due to the reaction contained in the reflux water, There are more materials, which will consume part of the 3, and the injection of 0 must include the reaction consumption part to increase. The water of this method uses clean supplemental water as the dissolution object, and the water contains low reaction components. Consumption of 0 蘧 is very limited, and it is stable, so it can be processed directly at the necessary concentration. Because 0 elephant has the fastest sterilization and algae killing functions and the least consumption, it can be quickly completed under high concentration. 4. The amount of 0 ice shower disinfection water is to maintain the hydraulic distribution in the cooling water tower, and to obtain the full contact between 0 and the reacting substances. Therefore, the 0 water flow rate for sterilization and algae killing should not be lower than the circulating cooling flow rate. In other words, the make-up water flow is about 1 5% -20%

Page 44 d526 d 0 V. Description of the invention (42), but if it is concentrated within 10-20 minutes, the flow rate can reach above the regular cooling circulating water flow rate, so it is also feasible in terms of hydraulics. 5.0 Table 0 Corrosiveness 0 is a strong oxidant and naturally has a high degree of corrosiveness. In dry gas, 0 夂 is limited to be corrosive, but it will become highly corrosive if combined with moisture, and it is more corrosive in aqueous solution. Strong, so in contact with 0 gas or 0 water solution materials, the material is generally stainless steel or plastic, wood and other corrosion-resistant materials are suitable. 0 has the characteristics of self-decomposition, so if time can be assumed, 0 weeks will decompose to 0 2 by itself, which will reduce its corrosion ability. Therefore, in a process, 〇3 will decrease its concentration with time _, generally speaking In deionized neutral pure water, its half-life (half-life) is about 3 OM I N under normal temperature and pressure. When the pH value is 8, the half-life is shortened to one quarter and the temperature rises to 4 5 At ° C, it is also shortened to a quarter. Under this process condition, the zero-burning half-life is only about tens of seconds to several minutes, and the residual 0 concentration is greatly reduced, and its corrosion ability is also reduced. Those discussed above are all self-decomposing effects in pure water without reaction. In the actual processing process, many impurities will consume 0.3. From low consumption, short time sterilization, algae elimination, Deodorization, decolorization, and competition with oxide formation, oxidative decomposition to COD with large consumption and long time, can consume many dissolved 0 3, or its converted hydroxyl radicals, so the residual 0 concentration is with the process The response decreases sharply, and the corrosion capacity is relatively reduced. The degree of corrosion is related to the corrosiveness and contact time. If the time is short, its corrosion effect is limited. Even if it has a highly corrosive solution, if it is used only for a short time,

Page 45 4 5 2 6 ^ -0 V. Description of the invention (43) Not only has little effect on the wetted material (WET PART), but also has the effect of removing surface attachments such as scale and iron scale. For example, highly corrosive liquids such as hydrochloric acid, sulfuric acid, and caustic are often used for surface cleaning or pipeline washing. Therefore, if time can be grasped, it will not only be non-harmful substances, but will also be helpful for removing attachments. 6. 0 A toxicity 0 is toxic, but because 0 is a transient gas, it does not have the phenomenon of cumulative concentration like ordinary toxic agents, and the main mechanism is to inhibit DNA in cells and cause inactivation. Before reaching the inactive concentration, there is no bactericidal effect even if the time is longer, and when it reaches the highest inactive concentration, even if the concentration is increased or continued, there is no room to play. Therefore, the so-called concentration is theoretically called The time value actually starts at the concentration that has the inactivation inhibitory effect, and the interval to the highest concentration of inactivity is applicable. The toxicity is related to the following factors: (1) 0 A concentration. (2) 0 continuous contact time with the target organism. (3) The CT value that the organism can withstand. Because 0 is used for sterilization, disinfection, algae killing, etc., it will be associated with its toxicity to humans. This concept is very different from the actual one, because the CT value of the human body is 50 0 0x 6 = 30, 0 0 0 PPM—seconds are harmless, CT value is 48, 0 00 PPM—seconds— 6 0, 0 0 0 PPM—seconds are temporary poisoning, if dissolved in water at a concentration of 0. 12 mg / 1, pH = 7.2, VIRUS Type 1 inactivation rate is 99.9%, the time required is about 2 minutes, the converted CT value is 144 PPM-seconds, and the distance is very large.

A526 ^ l0 on page 46 V. Description of the invention (44) Concentration, the high value is about 50, 0 0-1 0 0, 0 0 0 After dilution with air, it will probably not exceed 1,000 PPM ( VOL / VOL), that is, in general, immediately alert and stay away, and because it will decompose and react on its own, the concentration is not large. As for the concentration used in the injection process, it is usually below a few tens of PP Μ, And immediately dissolve and react, the zero concentration of emissions is almost less than 1 PPM, and when there is zero leakage or the concentration of emissions is too high, as long as the power is cut off or the amount is adjusted, it can be resolved immediately, so it is actually not toxic Existing examples, the monitoring value of 0 concentration in the environment is 1. 0 PPM, which can be used for warning and control. In the past, due to the question of harmfulness, a 0 ammonia emission decomposition device was set up, such as thermal decomposition, contact Media decomposition or activated carbon adsorption, but most of them have never been used, because even if the 0 concentration in the environment is high, as long as it is allowed to dissipate and decompose by itself, it can be completely eliminated. 7. Occurrence of 0 Occurrence of 0 is the amount of 0% required for processing according to the process, including the amount of effective reaction and the amount of invalid loss. In general continuous fluids, the 0 required for process processing is usually referred to as the injection rate, that is, relative to the flow rate. In the traditional method of injecting 0: with cooling circulating reflux water, although it is not intended to treat water quality, it is Maintain a sufficient concentration, so it is still calculated based on the injection rate, and the return water only serves as a dilution effect. In other words, if the 0 concentration in the same water is to be maintained, the amount of 0 ammonia is proportional to the flow rate. This is why the cooling circulating water is blocked. For the sex flow path, when the 0 treatment is carried out, an important reason for the large volume of 0 generation is required. According to the flow required for disinfection in the aforementioned 0 # of this construction method, the flow is only 0.2 to 0 of the cooling circulating water. Between 5, that is, the amount of 0 can be reduced to 0.2

Page 47 d5264〇 5. Description of the invention (45)-0.5. On the other hand, because the high-concentration 0-water injection method improves the dissolution rate and the generation rate of hydroxyl radicals, the self-decomposition and reaction consumption are reduced. Compared with the reflux water injection method, the utilization rate is several times, so The amount of gas required is even lower, which is a feature of this construction method. 8. The flow rate of water The liquid in the cooling water tower is a discontinuous fluid. Its dropping speed is affected by the effect of gravity and air resistance and pressure, and the relationship between the horizontal section of the cooling tower. In other words, the flow in the water tower has a relationship with the particle size and spacing of the water droplets. The processor in the cooling water tower is not a gas space, but a dirt or debris attached to the structure, or a biofilm with the structure as the medium. Object, so long as the 0 #drop can collide with the fixed object in the tower, it can produce the function of infiltration. It is different from the heat exchange between the cooling water and the atmosphere, so it is used to shower the ice flow attached to the structure. The demand is small (as long as the drip interval is not too long, and it has little effect on the particle size of the water droplets), so the flow of 0 water can be about 10-30% of the cooling circulating water. The suspension, inhabiting microorganisms, bacteria, algae, etc. at the bottom of the pond are converted into continuous fluids after confluence, and their residence time is affected by the flow rate. In the same volume, reducing the flow rate can extend the residence time and make the contact reaction more complete. In summary, the present invention is based on the hydrological characteristics of the cooling water tower in the cooling circulating water system, supplementary water, neutralizer, drainage water and sand filter tank, etc. The continuous on-line 0 3 injection method constitutes a process system suitable for 0 processing. Λ 6 2 6 4- 〇 5. Description of the invention (46) The invention has the following features and benefits: 1. The 0 treatment inside the cooling water tower is more thorough. (1) Cooperating with dripping and converging hydraulic application in cooling water tower, the water consumption of 0 treatment is small. (2) High-concentration 0-water, containing a high proportion of hydroxyl radicals, strong performance, rapid reaction completion, and low consumption. [3] The processing time is short and the influence on normal operation is low. 2. Gas phase 0 conversion and dissolved 0 # ratio is high. (1) Low pH and low water temperature, promote dissolution rate and reduce self-decomposition rate. (2) There are few reactants in the make-up water, and the loss is 0 J: less. (3) Dissolution tank with proper water depth and residence time to improve the effect of contact dissolution reaction. 3. Biological treatment function is exerted to purify water quality. (1) Combined with sand filtration equipment, the production of media biofilms improves the high purification capacity. (2) Mandatory sterilization of algae, oxidative peeling of biofilm, inhibiting the appearance of macroblocks, and dissolving the problems of biological mechanisms. (3) Backwash the sand bed and use it to remove the debris. (4) Periodic return to zero is safe and reliable. 4. It has less corrosion effect on the equipment, and has the function of surface rust removal. (1) After the cooling water tower is processed, the concentration of 0 is rapidly reduced, and the corrosion effect on the cooling equipment is reduced. (2) The processing time is less than ten minutes.

Page 49 d 5 2 B 4 〇 5. Description of the invention (47) surface, will not erode the inside of the structure. (3) Surface deposits such as scale and rust accumulated during long-term operation can be removed with a short time of 0 treatment. 5. Make full use of resources, no need to set up or increase, still save water. (1) Use make-up water as 0 dehydration water, and reduce ρ Η value with neutralizing acid. (2) Use B L 0 W D 0 W Ν water for backwashing of sand filter bed and removal of dirt. (3) Use biofilm purification to improve water quality and reduce inferior water discharge. 6.0 small capacity, small initial investment savings. (1) Increase the gas phase 0 decomposition rate and increase the energy conversion efficiency. (2) Treated with a high concentration of 0 containing a high proportion of hydroxyl radicals, with high efficiency, short time, and low consumption. (3) The amount of treatment water is reduced and the required injection volume is reduced. 7.0 The processing period is short and the running cost is low. (0 high concentration 0 processing time is extremely limited. (2) Periodic batch processing, only one short time treatment per cycle. 0) (3) In combination with the biofilm processing cycle, the cycle time is long and the actual operating time proportion is small. 8. Selective processing time, convenient operation and energy saving. (1) The processing selection in the cycle to meet the needs of the process operation. (2) Low night temperature, which is beneficial for maintaining 0 concentration and cooling water requirements.

P.50 4526 ^ 0 V. Description of the invention (48) Reduced. (3) Use off-peak time operation to save electricity costs. 9. Reduced toxicity. (1) 0 conversion and storage 0 This example is high and the emission rate is small. (2) Operation at low temperature and low ρ Η value, and small external 戌 amount. (3) Fully reacted with less residual 0 #. (4) 0 # The amount of production is small, the total amount is small, and it is easy to disperse. (5) Short operating time and limited hazards. 10. Control operation is simple and easy to automate. (1) Not affected by changes in flow, water quality, water temperature, and pH. (Injection rate is adjusted by independent processing system operation) (2) Various parameters can be operated with set amount, and no adjustment of variables is required. (3) Simple controls such as timing and linkage can be used to achieve automation. 11. Low setup fee. (1) It is necessary to reduce the capacity of the generating device. (2) Cooperate with facilities to dissolve tanks and pipes only. (3) There are not many modification parts and it is easy. Both existing and new installations are suitable for application. Ϋ́ 1 2. Operation cost savings. (1) Most of them are originally necessary facilities and will not increase operating costs. (2) 0 temples are small in amount, short in time, and low in power costs. (3) Save water consumption. (4) Simple and quick automation, saving manpower.

Page 51 V. Description of the invention (49) 1 3. The application of conventional technology is easy to implement. (1) Dissolution technology in water. (2) 0 Spread bacteria, kill algae, decolorize, deodorize, and oxidize, and integrate reaction treatment. (3) The cooling water tower is in contact with water. (4) a medium biofilm to generate a purification process. (5) Backwashing technology of sand filtration. The descriptions of the above embodiments are expressed for the purpose of explaining and describing the present invention, and they are not intended to limit or limit the present invention to the definite forms described; and, based on the above teachings or learning from the embodiments of the present invention, obviously Many modifications or changes are possible. This embodiment was chosen to most clearly explain the principles of the invention and its practical application, so that others skilled in the art may use the invention most effectively in various embodiments and with various modifications for the appropriate specific use intent. The technical idea of the present invention is determined by the following patent application scopes and their equivalence.

I 5 2 6 厶 Q

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Claims (1)

Α5? Β4〇_ 6. Scope of patent application Patent scope: 1. A semi-offline recycling type ozone water treatment system for cooling water circulating water, using a cooling water tower for cooling and circulating water to exchange heat with the atmosphere, and removing a sand filter tank The solids of the cooling circulating water are sent to the process equipment by a pressurized pumping machine to become cooling water, and the reflux water after heating up by the process equipment is returned to the cooling water tower, which is characterized by: A dissolution tank is used to introduce supplemental water, neutralizing agent and ozone gas to dissolve into high-concentration ozone water. The high-concentration ozone water is injected from the top of the cooling water tower for disinfection and sterilization and algae elimination, and the return water is used as the Backwash water required for sand filter tank. 2. The system described in item 1 of the scope of the patent application further includes an ozone decomposition device. The cooling circulating water is first introduced into the ozone decomposition device and then sent to the process equipment to protect the process equipment from ozone. corrosion. 3. The system according to item 1 of the scope of patent application, wherein the dissolution tank is dissolved by mechanical centrifugal force to increase the concentration of the ozone water. 4. The system as described in item 1 of the scope of the patent application, wherein the injection method of the high-concentration ozone water is 'injected into a proper amount in a back-to-back manner using the method of segmentation> main method'. 5. The system according to item 1 of the scope of the patent application, wherein during the cooling water tower treatment of the high-concentration ozone water, the return water is separated by side flow, and flows into the sand filter tank as the sand filter tank. Reverse washing water. 6. —Semi-offline return-type ozone water treatment device for circulating water of cooling water tower, including: a dissolving tank, introducing supplementary water, neutralizing agent and ozone gas to dissolve into high concentration Page 54 ^ 5 2640 6. Ozone water with patent application scope; A cooling water tower is a device for cooling circulation water to heat exchange with the atmosphere. The high-concentration ozone water is injected from the top of the cooling water tower for disinfection and sterilization. Algae; a sand filter tank, which uses sand filtration to remove the solids of the cooling circulating water and discharge the waste water, and then uses a pressurized pump to send the cooling circulating water into the process equipment to become cooling water, which is heat exchanged by the process equipment The heated return water is returned to the cooling water tower, and during the cooling water tower treatment using the ozone water, the return water is separated by side flow, and then flows into the sand filter tank as a backwash of the sand filter tank. water. 7. The device described in item 6 of the scope of patent application, further comprising an ozone decomposition device, the cooling circulating water is first introduced into the ozone decomposition device, and then sent to the process equipment to protect the process equipment from ozone. corrosion. 8. A semi-offline return-type ozone water treatment method for circulating water of a cooling water tower, which is characterized by mixing and dissolving make-up water, a neutralizing agent and ozone gas into high-concentration ozone water, and then dividing them into sections, respectively Sequentially inject a proper amount into a cooling water tower to disinfect, sterilize, and kill algae of the cooling circulating water, and during the cooling water tower treatment using the ozone water, isolate the return circulating water sidestream, and change it into a sand filter The tank is used as the backwash water of the sand filter tank. 9. The method according to item 8 of the scope of patent application, wherein the ozone water is injected from the top of the cooling water tower. 1 0. —A semi-offline return-type ozone water treatment method for circulating water in a cooling water tower, the procedure of which includes: Page 55 6. Scope of patent application a. Preparatory procedures for treatment and cleaning: a neutralization agent is injected into a dissolution tank, an ozone generating device is started, and ozone gas is dissolved in the dissolution tank; b. Processing and cleaning start procedures : Initiate make-up water into the dissolution tank to make ozone water, switch the cooling water tower inflow from return water to flow into the ozone water, and the return water flows to a sand filter tank as a backwash water through a bypass line; c Ozone treatment stop procedure: Turn off the ozone generating equipment, at this time the makeup water continues to flow; and d. Backwash start procedure: The makeup water stops, drainage of the sand aqueduct, recoil backwash water starts, and the cooling water tower enters. The flow is switched back to the return water; and e. Washing completion procedure: Close the backwash and backwash water inflow and the drainage outflow of the sand filter tank. Page 56