Add time: 2015-03-16 Entry: Website Source: Original
Structural diagram of cooling tower With the development of industrial production and the continuous improvement of people's living standards, the control of water environment pollution and the rational development and utilization of water resources are imminent. For this reason, many units generally use FRP cooling towers, which are ideal equipment for energy efficiency, to implement closed-cycle internal water use, which improves repeated utilization and effectively reduces costs. At the same time, it makes people adjust the temperature, humidity, cleanliness, and Noise-affected desires become reality. FRP cooling towers are corrosion-resistant, high-strength, light-weight, small in size, occupy less land, beautiful and durable, and are more convenient to transport, install and maintain. Therefore, it is widely used in various sectors of the national economy, and is particularly suitable for cooling water circulation systems such as air conditioning, refrigeration, air compressor stations, heating furnaces, and condensation processes. Round counterflow glass fiber reinforced plastic cooling tower Round counterflow glass fiber reinforced plastic cooling tower adopts counterflow gas heat exchange technology, and the filler uses high-quality modified polyvinyl chloride wave plate to spread the water spray area; the water distribution is achieved by rotating the water distribution method , To enhance the cooling effect. Our factory has made partial improvements to the shape design of this series of products, making it more reliable, durable, and easy to assemble. Main structure cooling water tower structure diagram (1) DBNL3 series low-noise glass fiber reinforced plastic cooling tower-suitable for water temperature drop 3— 8 degree air-conditioning refrigeration unit and other general cooling occasions. (2) CDBNL3 series ultra-low-noise glass fiber reinforced plastic cooling towers-suitable for hotels, hospitals, public buildings and places closer to residential areas with stricter noise requirements. (3) GBNL3 series medium and high temperature industrial glass fiber reinforced plastic cooling towers-suitable for industrial water circulation cooling system with water temperature drop of 10-25 degrees. The model is composed of three series of circular counterflow glass fiber reinforced plastic cooling towers: DBNL3, CDBNL3, GBNL3 Performance and selection 1. Design parameters: 1) Standard working conditions: water inlet temperature t1 = 37 ℃, water outlet temperature t2 = 32 ℃, design wet bulb Temperature τ = 28 ° C, that is, water temperature Δt = 5 ° C, cold range height t2-τ = 5 ° C 2) Moderate temperature conditions: water inlet temperature t1 = 43 ° C, water outlet temperature t2 = 33 ° C, design wet bulb temperature τ = 28 ℃, namely water temperature Δt = 10 ℃, cold range height t2-τ = 6 ℃ 3) High temperature conditions: water inlet temperature t1 = 60 ℃, water outlet temperature t2 = 35 ℃, design wet bulb temperature τ = 28 ℃, ie Water temperature Δt = 25 ° C cold range height t2-τ = 8 ° C 2. When selecting, you must know the amount of water Q, inlet temperature t1, outlet temperature t2 and design wet bulb temperature τ. The cooling tower then determines the model based on the thermal performance curve. See Table 1 and Table 2 for the thermal performance curve. For working conditions other than the curve table, thermal calculation can be performed. The bulk bulk coefficient β × ν of the filler is as follows: at 1.2 times nominal flow rate: β × ν = 18600 at 1.0 times nominal flow rate: β × ν = 17800 0.8 times nominal Flow rate: β × ν = 17000 3. Operating weight is calculated by half the depth of water stored in the tower. If it is calculated based on full water, it should be multiplied by 1.5. 4. This series of cooling towers are used in areas where the average temperature of the coldest month is not lower than -10 ° C. Users who have too low temperature should put forward the requirement to prevent freezing in order to configure the water guide ring to prevent the water from flowing on the louvers. During the intermittent operation in winter, electric heating pipes can be added in the water tank. This series of cooling towers are used in areas where the average temperature of the coldest month is not lower than -10 ° C. Users who have too low temperature should put forward the requirement of preventing freezing in order to configure the water guide ring to prevent the water from flowing onto the louvers. During the intermittent operation in winter, electric heating pipes can be added in the water tank. 5. The turbidity of circulating water is not more than 50 mg / L, and not more than 100 mg / L in the short term. It should not contain oil pollution and mechanical impurities. If necessary, take measures to eliminate algae and stabilize water quality. 6. The applicable water temperature does not exceed 60 ° C. If it exceeds, it can be stated at the time of ordering. Our factory will solve it from the selection of materials. If flame-retardant cooling tower is required, please specify when ordering, our factory can meet the requirements. 7. The water distribution pipe is opened according to the nominal flow rate. If the actual flow rate differs from the nominal flow rate by more than ± 15%, the user of the cooling water tower should specify it when ordering. 8. The water pressure of the inlet pipe is about 2-5 meters of water column. Do not design the pressure too high, otherwise the phenomenon of floating water will occur. 9. The motors and fans are all supplied. The factory needs to send personnel to install or provide technical guidance on site, plus additional fees. 10. When users need to directly absorb water under the cooling tower, they need to install "automatic water supply pipe", "rapid water supply pipe", "sewage pipe" and "overflow pipe", which must be specially put forward when ordering. Structural features (1) Tower body: reasonable profile, stable airflow, excellent material, bright colors, UV-resistant agent contained in the surface gel coat resin, aging resistance, high strength, light weight, and corrosion resistance. The lower tower body can be equipped with overflow, sewage, and automatic water supply pipes according to the order requirements. Water can be directly absorbed here, eliminating the need for a cooling pool, and a noise-proof and muffler pad is installed on it, which effectively reduces the sound of dripping water. (2) Filler: Modified polyvinyl chloride wave plate is used, and the ribs are increased in the horizontal direction. The water redistribution ability is strong, the resistance is small, the thermal performance is good, the high temperature resistance is 70 degrees, the low temperature is -50 degrees, and the flame resistance is good. (3) Rotary water distributor and water distribution pipe: equipped with stainless steel ball bearings, flexible and reliable operation, low head, uniform water distribution, water distribution pipe made of aluminum alloy cooling water tower or glass fiber reinforced plastic. Water drift phenomenon. (4) Fan: a low-noise, high-efficiency fan designed by the Department of Engineering Mechanics of Tsinghua University based on a series of cooling tower parameters, aluminum alloy plate airfoil or FRP blade, with low noise and high efficiency. (5) Motor: Low-noise and energy-saving motor designed for cooling towers based on Y-series installation dimensions by the Department of Electrical Engineering of Tsinghua University, with good sealing and waterproof performance, high temperature resistance, high efficiency, and low noise. (6) Deceleration device: It adopts polyester fiber reinforced neoprene power belt transmission, high temperature resistance, high efficiency, does not stretch in water, overcomes the slip phenomenon, and has low noise. (7) Sound-absorbing facilities: Ultra-low-noise cooling towers have added shielding with sound-absorbing materials outside the air inlets, and are equipped with sound-absorbing grilles on the upper and lower parts to achieve maximum noise reduction. The bell mouth shield with sound-absorbing material and sound-absorbing grille are installed at the air outlet of the upper tower body, which reduces the noise from the fan and the motor. (8) Intake window: It is equipped with fiberglass louvers, which reduces water drift and small airflow resistance. It is especially suitable for units that need to use cooling towers in northern regions and throughout the year. (9) Bracket: All steel brackets for fans, fillers, intake windows, towers, etc. are assembled, galvanized or painted for corrosion protection. Fasteners are galvanized or stainless steel bolts. Notes for installation, commissioning and use 1. The basic drawings and installation dimensions in this manual are for reference during installation. The direction of the inlet and outlet pipes of the small counterflow tower can be arbitrarily selected in the horizontal position, but it must not collide with the foundation. If there is a foundation in the middle, its load shall be 25% of the operating weight, and the remaining 75% shall be equally borne by the peripheral rectangular foundation. If the roof is installed, additional pressure caused by the load shall be considered. 2. A bracket should be installed at the connection between the cooling tower and the inlet and outlet pipes to prevent excessive weight from being pressed on the tower wall. Cooling tower 3, fan blade should be adjusted before installation and use to keep the same angle. The method is to mark the front and back edges of each leaf at a distance of 150 mm between the leaves, and then measure the distance between the front and back edges of each leaf by the lower chord of the bracket to calculate the height of the front and back edges of each leaf. Poor. Pass the adjustment several times to make the height difference consistent. 4. Seal the junction box after the motor is connected, and pay attention that the current test value does not exceed the rated current of the motor. 5. When starting the cooling tower, you must turn on the water pump first and then the fan. It is not allowed to run the fan without water spray. The fan can be reversed and deiced at low speed for a short time. 6. The reducer should be filled with oil before use. It can be lubricated with No. 50 anti-wear gear oil or oil. It should be replaced with new oil after 100-300 hours of initial operation, and once every 3000-5000 hours after operation. The oil level should be moderate and the oil level should be easy to observe. 7. When the cooling tower is running, there should be someone to manage it, pay attention to the changes in current and water temperature, and inspect the motor, reducer, water distributor, etc. regularly.
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Shandong Anqiu Yatai FRP Co., Ltd.
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