Industrial circular cooling tower

Industrial circular cooling towerCorrosion resistance, high strength, light weight, small size, small footprint, beautiful and durable, and convenient transportation, installation and maintenance. Therefore, it is widely used in various sectors of the national economy, especially suitable for cooling water circulation systems such as air conditioning, refrigeration, air compression stations, heating furnaces, and condensation processes.
The circular counterflow fiberglass cooling tower adopts counterflow gas heat exchange technology, and the packing material uses high-quality modified polyvinyl chloride waveplates to diffuse the water spraying area; By rotating the water distribution method, uniform water distribution is achieved, enhancing the cooling effect. Our factory has made partial improvements to the exterior design of this series of products, making them more reliable, durable, and easy to assemble

Industrial circular cooling towermain purpose
(1) DBNL3 series low-noise fiberglass cooling tower - suitable for general cooling applications such as air conditioning refrigeration units with water temperature drops of 3-8 degrees.
(2) CDBNL3 series ultra-low noise fiberglass cooling tower - suitable for hotels, hospitals, public buildings, and places close to residential areas with stricter noise requirements.
(3) GBNL3 series medium high temperature industrial fiberglass cooling tower - suitable for industrial water circulation cooling systems with a water temperature drop of 10-25 degrees.
Model composition and significance
There are three main series of circular counterflow fiberglass cooling towers: DBNL3, CDBNL3, and GBNL3
Performance and Selection
1. Design parameters:
1) Standard operating conditions: Inlet water temperature t1=37 ℃, outlet water temperature t2=32 ℃, design wet bulb temperature τ=28 ℃, i.e. water temperature Δ t=5 ℃, cooling amplitude height t2- τ=5 ℃
2) Medium temperature condition: Inlet water temperature t1=43 ℃, outlet water temperature t2=33 ℃, design wet bulb temperature τ=28 ℃, i.e. water temperature Δ t=10 ℃, high cooling amplitude t2- τ=6 ℃
3) High temperature condition: inlet water temperature t1=60 ℃, outlet water temperature t2=35 ℃, design wet bulb temperature τ=28 ℃, i.e. water temperature Δ t=25 ℃, high cooling amplitude t2- τ=8 ℃
2. When selecting, it is important to note the water quantity Q, inlet temperature t1, outlet temperature t2, and design wet bulb temperature τ, and then determine the model based on the thermodynamic performance curve. The thermal performance curves are shown in Appendix 1 and Appendix 2. For operating conditions outside the curve table, thermal calculations can be performed, and the volumetric mass dispersion coefficient of the packing material, β × ν, is as follows:
When 1.2 times the nominal flow rate: β × ν=18600 When 1.0 times the nominal flow rate: β × ν=17800 When 0.8 times the nominal flow rate: β × ν=17000
3. The operating weight is calculated based on half the depth of water stored in the tower body. If calculated based on full water, it should be multiplied by 1.5.
4. This series of cooling towers is used in areas where the average temperature in the coldest month is not lower than -10 ℃. Users in areas with excessively low temperatures should request to prevent freezing in order to install sprinkler guide rings to prevent water from flowing onto the louvers. During the intermittent operation in winter, an electric heating tube can be added to the water tank. This series of cooling towers is used in areas where the average temperature in the coldest month is not lower than -10 ℃. Users in areas with excessively low temperatures should request to prevent freezing in order to install sprinkler guide rings to prevent water from flowing onto the louvers. During the intermittent operation in winter, an electric heating tube can be added to the water tank.
5. The turbidity of the circulating water should not exceed 50 milligrams per liter, and should not exceed 100 milligrams per liter in the short term. It should not contain oil stains or mechanical impurities, and algae killing and water quality stabilization measures should be taken if necessary.
6. The applicable water temperature does not exceed 60 ℃. If it exceeds, it can be explained at the time of ordering, and our factory will solve the problem in terms of material selection. If you need a flame-retardant cooling tower, please indicate at the time of ordering that our factory can meet the requirements.
7. The water pipe is perforated according to the nominal flow rate. If the actual flow rate differs from the nominal flow rate by more than ± 15%, the user should provide an explanation when placing an order.
8. The water pressure in the inlet pipe is approximately 2-5 meters of water column. When designing, do not use excessive pressure, otherwise floating water may occur.
9. Both the motor and fan are supplied as accessories, and on-site installation or technical guidance by our factory personnel is required. Additional fees will be charged.
10. When users need to directly absorb water from the lower body of the cooling tower, they need to install "automatic water supply pipe", "rapid water supply pipe", "sewage pipe", and "overflow pipe", which need to be specifically mentioned when ordering.

structural characteristics
(1) Tower body: Reasonable profile, smooth airflow, excellent material, bright colors, surface coating resin containing anti UV agent, aging resistance, high strength, light weight, corrosion resistance. According to the ordering requirements, the lower tower body can be equipped with overflow, sewage, and automatic water supply pipes, which can directly absorb water from here, eliminating the need for a cooling pool. It is also equipped with noise reduction pads, effectively reducing dripping sound.
(2) Filler: Modified polyvinyl chloride wave plate is used, with convex ribs added horizontally. It has strong water redistribution ability, low resistance, good thermal performance, high temperature resistance of 70 degrees, low temperature of -50 degrees, and good flame retardancy.
(3) Rotating water distributor and water distribution pipe: equipped with stainless steel ball bearings, it operates flexibly and reliably, with low water head and uniform water distribution. The water distribution pipe is made of aluminum alloy or fiberglass, and a water collection plate is installed on the pipe to overcome the phenomenon of floating water.
(4) Fan: A low-noise, high-efficiency fan designed by the Department of Engineering Mechanics at Tsinghua University based on a series of cooling tower parameters, with aluminum alloy plate airfoil or fiberglass blades, low noise, and high efficiency.
(5) Motor: A low-noise energy-saving motor designed by the Department of Electrical Engineering at Tsinghua University for cooling towers based on the Y-series installation dimensions. It has good sealing and waterproof performance, high temperature resistance, high efficiency, and low noise.
(6) Deceleration device: It adopts polyester fiber-reinforced chloroprene rubber power belt transmission, which is heat-resistant, efficient, does not stretch when encountering water, overcomes slipping phenomenon, and has very low noise.
(7) Sound absorption facilities: The ultra-low noise cooling tower has added a shield with sound-absorbing materials outside the air inlet, and is equipped with sound-absorbing grilles in the upper and lower parts to achieve the maximum noise reduction effect. A horn shaped shield and sound-absorbing grille with sound-absorbing material were installed at the outlet of the upper tower, reducing the noise emitted by the fan and motor.
(8) Air intake window: equipped with fiberglass louvers to reduce floating water and low airflow resistance, especially suitable for units in northern regions and those that need to use cooling towers all year round.
(9) Bracket: All steel brackets for fans, fillers, air inlet windows, tower bodies, etc. are prefabricated, galvanized or painted for corrosion protection. Fasteners are made of galvanized or stainless steel bolts.
Installation, debugging, and usage instructions
1. The basic diagram and installation dimensions in this manual are for reference during installation.
The direction of the inlet and outlet pipes of a small counter current tower can be arbitrarily selected in a horizontal position, but it must not collide with the foundation.
If there is a foundation in the middle, its load should be 25% of the operating weight, and the remaining 75% should be evenly borne by the peripheral rectangular foundation. If installed on the roof, the additional pressure caused by the load should 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 pressing on the tower wall.
3. The fan blades should be adjusted and maintained at an angle * before installation and use. The method is to mark the front and rear edges of each blade at a distance of 150 millimeters near the inter leaf space, and then measure the distance between the front and rear edges of each blade using the lower chord of the support to calculate the height difference between the front and rear edges of each blade at this point. By adjusting the height difference several times to reach *, it is considered qualified.
4. After connecting the motor, the junction box should be sealed, and attention should be paid to ensuring that the current test value does not exceed the motor's rated current.
5. When starting the cooling tower, be sure to start the water pump first and then turn on the fan. It is not allowed to operate the fan without pouring water. The fan can be turned in reverse at low speed for a short period of time to remove ice.
6. The reducer should be lubricated with 50 # anti-wear gear oil or engine oil before use. The oil should be replaced after 100-300 hours of initial operation and every 3000-5000 hours thereafter. The oil level should be moderate, and the oil gauge should be easy to observe.
7. When the cooling tower is in operation, there should be a dedicated person to manage it, regularly pay attention to changes in current and water temperature, and regularly inspect the motor, reducer, water distributor, and other parts.

Related technical parameters: