Technical Support

After 5-8 years of normal use of general cooling tower, it is necessary to replace the pvc fill. In case of no normal maintenance, the fill needs to be replaced once every two years. If the following abnormalities occur to the fill in the tower, it shall be replaced in time to make the thermal efficiency of the whole tower reach the predetermined goal. 1. Scaling. The packing in the tower has scale, which is generally calcium carbonate scale attached to the fill, which is stone like and hard in texture. 2. Sinking. The fill of the tower body is stained with heavy mud ash, and sometimes a large number of algae grow, which makes the fill sink and cannot be used. 3. Aging. After long-term use, due to the erosion of water and air, the fill is gradually old, brittle and easy to be damaged. The aging of high temperature tower packing is faster than that of ordinary tower, and it is generally replaced once every 4 to 6 years. 4. The fill of cooling tower is seriously damaged due to improper selection or operation. Each type of cooling tower has design work index value, and improper selection will directly lead to serious damage and scrap of cooling tower. However, in the important working indexes such as inlet water temperature and configuration tonnage, if the working index is greater than the design index value due to improper operation, it will also cause serious damage to the filler.

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Fan maintenance of closed cooling tower? Fan is the main component of closed cooling tower. The quality of fan and the air volume of fan affect the working efficiency of cooling tower. The fans used in the closed cooling tower are made of FRP, aluminum alloy and other materials. Different materials also have great differences in quality and service year. Therefore, proper maintenance is more important. Pay attention to a few points in the maintenance of fans of closed cooling tower. Fan maintenance of closed cooling tower? 1.Add lubricating oil regularly. The blade rotation of the fan is driven by the high-speed fan. The shaft of the motor is prone to lack of oil, resulting in poor rotation and increased friction. Reduce the service life of the fan, improve the damage rate, add lubricating oil regularly and keep the speed smooth. 2. Calibrate the air duct regularly. When some wind turbines, especially those made of glass, are rotating at high speed, there will be the problem of improper inclination of the wind turbines, and the friction of the wind blades will be damaged. It is necessary to regularly send professional maintenance personnel to correct the position of the wind turbines, or to reinstall the position. Ensure the average and reasonable clearance between the air duct and the air blade. 3. Replace the damaged blades in time. Generally, there are three blades. If one of the blades is damaged, the wind force will be different early, and the wind force will be unbal...

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Daily maintenance of closed cooling tower.Closed cooling tower is not suitable for direct contact with the outside air, which may cause corrosion and oxidation, greatly reducing the service life of cooling. Daily maintenance of closed cooling tower? For the cooling fluid of closed cooling tower, if it contacts with the outside world for a long time, it is easy to be polluted and produce toxic and harmful substances. The closed cooling tower must be cleaned in time. In addition, we should pay attention to the problem of clogging the spray buckle, because if we do not clean it for a long time, especially if the water quality of the cooling tower is not clean, it will form scale, biological algae sludge and other dirt, it will block the heat exchanger and its filter and a series of problems, which will directly cause the low heat exchange efficiency. For the closed cooling tower, it can not be in the state of high-temperature heat load for a long time. In this case, it actually causes the fatigue and corrosion damage of its metal, which will directly lead to the perforation and leakage of the closed cooling tower equipment.

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When is the refrigerant added to the closed cooling tower? When the ambient temperature is about 0 ° C, it can be considered to add coolant on the pipeline or the circulating water tank, so as to increase the surface temperature of the closed cooling tower, so as to facilitate anti freezing. When is the refrigerant added to the closed cooling tower? Add antifreeze: when the local low ambient dry bulb temperature (air temperature) is – 10 ° C or lower than – 10 ° C, 20-30% high content antifreeze should be added, with the actual ice free freezing as the criterion, and the user can grasp it flexibly according to the actual situation. The working fluid (water, oil or other liquid) of the closed cooling tower flows in the coil, the outer wall of the coil is wrapped by spray water, the heat of the fluid is transferred through the pipe wall, and the water and air are saturated with hot and humid steam. The heat is discharged into the atmosphere by the fan. The spray water is cooled by PVC radiator during the circulation, and flows in the same direction with the fresh air into the air. The coil mainly depends on the wet The important feature of the operation principle is that it is possible to inhibit the formation of scale on the outer wall of the coil. The closed cooling tower adopts totally closed circulation, without impurities entering and with small pollution; the application of the closed cooling tower can effectively improve the utilization coefficient of the ...

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Why the cooling tower can only drop to the temperature near the wet bulb? When the cooling tower is used, it can cool down quickly, but the temperature is about the wet bulb temperature, but it can’t be lowered to 3 ℃ lower than the wet bulb temperature. The temperature drop of the cooling tower can be said to be close to the local wet bulb temperature! But not more. Cooling tower is a large-scale refrigeration and cooling equipment which takes away heat through water evaporation and heat absorption. Want to know why, need to know what is wet bulb temperature first, want to measure wet bulb temperature, need to put wet bulb thermometer in ventilated place, read wet bulb temperature in air flow remember scale, it is wet bulb temperature. Because the water we spray on the surface of the condenser absorbs heat. As the temperature rises, it condenses into water vapor and evaporates continuously. The water vapor will mix with the air, and the water vapor with high temperature will exchange heat with the air continuously. To achieve a balance, on the contrary, if the temperature of the condenser is lower than that of the wet bulb, the temperature in the air will be absorbed. When cooling, because of the influence of various factors, it is only near the wet bulb temperature. There is an error. We control the error within 3 degrees of the wet bulb temperature!

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There is a large height difference between the air inlet and the air outlet, so it is not easy for the air to flow in and out, and the temperature of the intake air can be lower. The heat exchange power of the countercurrent tower is high. The air inlet louvers of the closed cooling tower can be arranged along the circumference or around it, so the air inlet is more uniform and the cooling effect is good. On the external dimensions, the diameter of the circular tower is larger than that of the square tower with the same function, and the side length is also larger. For these reasons, the application of the circular tower that is constrained by the area is affected. When the direct cooling beam of the closed cooling tower fill block has a small support, the supporting beam should have a small width, and the structure and ventilation resistance should be small. The beam spacing should be equipped with a simple support lining plan. When the grid is supported, the span of the grid simply supported and the span of the support beam should be together, and the grid corrosion function should be compatible with the fill. The fill function and thermal function should be combined with the general comments of the fan function, and the cooling capacity should be selected under the same planning conditions. For film packaging, when the combination of the same type of paper and the height are different, it should be calculated. When the planned temperature difference is large, a larger p...

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The main parameters affecting the selection of closed cooling towers are as follows: Cooling water quantity Q (m / h): When selecting a cooling tower, the calculated cooling water quantity must be multiplied by an appropriate (usually 1.1 ~ 1.3) coefficient. Inlet water temperature t (℃): Standard design conditions for civil cooling towers are: inlet water temperature 37 ℃, outlet water 32 ℃, temperature difference between inlet and outlet water is 5 ℃; industrial cooling tower design conditions are generally 65 ℃ ~ 45 ℃, 43 ℃ ~ 33 ℃, 40 ℃ ~ 32 ℃, etc., the temperature difference between the inlet and outlet towers can reach 8 ℃ -20 ℃. Outlet water temperature t (° C): The difference between the temperature of the cooling tower inlet water and the outlet water temperature is generally called the cooling range, which mainly depends on the wet bulb temperature of the surrounding air. The cooling water effectiveness of a cooling tower is measured by the difference between the temperature of the effluent and the temperature of the wet bulb, or a close value. Therefore, changes in the local wet bulb temperature directly affect the cooling effect of the cooling tower. Wet bulb temperature o (° C): Wet the gauze on the thermometer with wet gauze, and immerse the lower end of the gauze in a water-filled container to become a wet bulb thermometer. Place the wet bulb thermometer in a ventilated place to allow continuous air circulation. At this time, the thermometer reads the wet bu...

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Because the cooling water mostly contains calcium, aluminum ions and acid carbonates. When cooling water flows through the stainless steel to passivate, there is conversion of carbonate. In addition, the oxygen dissolved in the cooling water can cause metal corrosion and rust. Due to rust, the actual effectiveness of heat transfer in closed cooling towers is reduced. When it is more serious, it is unavoidable to spray cooling water outside the casing, and when the scale is more serious, the water pipe is blocked, so that the actual effect of heat transfer is ineffective. Scientific research data show that the damage of dirt alluvium to heat transmission is very harmful, and the rise of the alluvium will lead to an increase in electricity and energy costs. Even a thin layer of dirt will increase the operating cost of about 40% of the dirt in the machinery and equipment. Maintaining water-cooled safe passages that can contain mineral alluvial materials can rise well, save resources, increase the life of machinery and equipment, and save production time and costs. Traditional cleaning methods such as mechanical equipment methods (scraping, brushing), pressurized water, and pickling passivation have encountered many problems when cleaning machinery and equipment: it is not possible to completely remove alluvial deposits such as scale, acid liquid, etc. Equipment and equipment lead to erosion resulting in system loopholes. Residual acid causes re-etching or sub-scale erosion of...

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The noise of cooling tower is mainly dominated by fan noise and falling water noise. Fan noise is the noise generated by the fan when it is running, mainly aerodynamic noise, including rotation noise and eddy current noise. It also has reducer noise and motor noise that drives the fan. The falling water noise is the sound of falling water that collides with the tower chassis and the water accumulated in the tray when the cooling tower falls from the water spray device. Its value is related to the falling water height and the water flow per unit time. In addition to the noise mentioned above, there are noise from circulating water pumps, matched motors, and radiated noise from pipes. Because the noise of the cooling tower affects the prediction mode and the size of the cooling tower, and the distance between the prediction point and the cooling tower, the delimitation of the range of different prediction modes is not clear at present. You can consult the manufacturer on the selection and range of the cooling tower mode. 的 The noise of the cooling tower affects work and life and brings inconvenience to people. There are four main ways to reduce the noise pollution of cooling towers: reasonable layout, reasonable selection of cooling towers, control of propagation channels, and protection of sound receiving bodies.

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The main principle of the closed cooling tower is that the spray water is evaporated on the outer wall of the coil to cool the fluid in the tube, and the fan is used to take away the generated water vapor in time. A small part of the spray water evaporates, and the rest is collected and circulated by the chassis. In addition to being used in air conditioning systems, it can also be used in metallurgy, chemical, and petroleum industries. But its use also increases manufacturing investment and operating costs. Therefore, optimization design is needed to achieve the purpose of economical energy saving. Its main component is a tube evaporative cooler, and its structural parameters have an important influence on the optimal design of the closed cooling tower. Therefore, the optimization of its structure focuses on the optimization of the tube evaporative cooler. 1.Optimization of objective function structure Through the cooperation of different cooling components, its operating efficiency is reduced. 2.Coolant optimization Different coolants have an important decisive effect on its cooling. 3.Working environment of closed cooling tower (environmental optimization) Installing it in a ventilated environment can increase operating efficiency and facilitate air circulation in the tower.

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Industrial installation instructions for FRP cooling towers? Glass fiber reinforced plastic cooling tower is a type of closed cooling tower. As a type of installation that uses repeated cooling of water to attract thermal energy to raise the temperature of water, it is widely used. FRP cooling towers are mostly made of polyester FRP. Because it is used in the open air, the effects of water resistance and aging resistance must also be considered. It is better to add fiber-reinforced materials to manufacture the glass fiber reinforced plastic cooling tower shell. It is better to use glass fiber exterior felt with high natural resin content, and pay attention to the following points in specific installation. The place where the FRP cooling tower is installed is generally a roof or a place with air circulation. For some special requirements, a sunken installation can also be used. Do not install too close to the waterproof channel, high volume wall that is easy to reflect the volume, and pay attention to the distance between the tower body and the external wall. Two or more FRP cooling towers can be used in series, but the distance between the towers should be paid attention to. It should not be installed in a place with poor ventilation, especially in a sealed place. Pay attention to installing in a clean environment. Although the closed cooling tower is closed, if it is installed in a place with soot and dust, it may be blocked. Pay attention to the surrounding environment....

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What should I pay attention to when the closed cooling tower is shut down? The heat removal design of the closed cooling tower is mostly selected according to the hot summer climate. For the closed cooling tower in winter, the heat removal may be too large. A closed cooling tower is a device that puts a tube heat exchanger (heat exchange coil) in the tower and reduces the temperature through ventilation, spray water and heat exchange with circulating water. Closed cooling towers are operated, and the ambient temperature is higher than zero degrees. The closed cooling towers may also reduce the water in the pipes to zero degrees and even freeze. The closed cycle can guarantee less water consumption and less possibility of water quality pollution, which can better ensure the operation of the main equipment and increase the service life. The water collecting tank, spray pipe, spray and other components inside the tower body timely arrange the dust to ensure the cleanness of the heat exchange environment and reduce the backlog of scale and dirt. Check whether there is dust on the components and the inner wall, and handle the dust in time. For the appearance of dirt, check whether the size of the fan blades, the gap between the fan blades and the wind blade is reasonable. Check whether the copper ball valve float in the water collecting tank of the closed cooling tower is damaged, and whether there are any leaking points in the water collecting tank and tower feet. Check whethe...

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Closed cooling tower is effective in applying natural cold sources, and have cooling effects in many occasions. Closed cooling towers have a wide range of applications, have a strong ability to adapt to the environment, can cool water at high temperatures, and use machinery Ventilated closed cooling towers are used as research objects. Through theoretical analysis and specific experiments, the heat transfer performance of closed cooling towers has been studied, and the performance of closed cooling towers has been strengthened according to changes in the diameter of cooling coils. About the efficiency of wet exchange. According to the characteristics of the heat in the cooling tower, mechanical ventilation cooling, according to theoretical analysis and condition assumptions, the mathematical model established by the principle determines the thermal balance and calculation theory, the total heat transfer coefficient of the water spray and the total water spray from outside the pipe According to the experimental data, the thermal efficiency mechanical ventilation of the closed cooling tower is analyzed from five aspects. By analyzing the factors affecting the cooling effect of the closed cooling tower, the ideal operating parameters and structure of the cooling tower are known. VIEW MORE

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