Square
type crossflow closed circuit cooling tower
Cooling tower profile
The cooling tower adopts steel frame and
glass fiber reinforced plastic enclosure structure, and is equipped with energy
recovery type FRP air cylinder low-resistance high-efficiency flame-retardant
strength water-filling filler, high-efficiency fan, low-resistance
high-efficiency water collector.
The product can reduce the energy
consumption of the chiller, save energy, ensure the efficient operation of the
chiller, and is suitable for a variety of climates. Small in size, low in
height, light in weight, beautiful in appearance, compact in structure and
light in height, especially suitable for installation in indoors and balconies
where the narrow height of the site is restricted, and the cooling effect is
good and the running noise is low.
Difference between
square type crossflow
closed circuit cooling tower and Traditional open cooling tower
The cooling water of the open cooling tower is in direct contact with the air in the packing for heat exchange, so the purity of the cooling water system cannot be maintained, and the cooling water inevitably absorbs dust and bacteria in the air. In the closed cooling tower, the cooling water flows in the coil, and the spray water and air are outside the disc, so the cooling water and the outside air are not in contact, and the purity of the cooling water system can be kept forever.
Square type crossflow closed circuit
cooling tower working principle
The working fluid (water, oil or other
liquid) flows in the coil clock, the outer wall of the coil is wrapped by the
spray water, the heat of the fluid is transmitted through the wall of the tube,
and the saturated hot and humid air is formed with the water and the air, and
the heat is discharged into the atmosphere by the fan. The parts are blocked
and sprayed back to the sink, and the consumption is very small. The spray
water reduces the water temperature through the PVC heat-dissipating material
during the circulation process, and flows in the same direction as the fresh
air. The coil mainly relies on the sensible heat conduction mode. An important
feature of the principle is the maximum possible suppression of scale formation
on the outer wall of the coil.
Square type crossflow closed circuit
cooling tower Application industry
The cooling water of the cooling tower can
provide cooling for the production process and the machine. The industries it
adapts to are:
Air conditioning equipment industry
Metal processing industry
Energy industry
Chemical industry
Plastic products industry
Pharmaceutical Industry
Video processing industry
Square type crossflow closed circuit
cooling tower working principle
The working fluid (water, oil or other
liquid) flows in the coil clock, the outer wall of the coil is wrapped by the
spray water, the heat of the fluid is transmitted through the wall of the tube,
and the saturated hot and humid air is formed with the water and the air, and
the heat is discharged into the atmosphere by the fan. The parts are blocked
and sprayed back to the sink, and the consumption is very small. The spray
water reduces the water temperature through the PVC heat-dissipating material
during the circulation process, and flows in the same direction as the fresh
air. The coil mainly relies on the sensible heat conduction mode. An important
feature of the principle is the maximum possible suppression of scale formation
on the outer wall of the coil.
Square type crossflow closed circuit
cooling tower Features:
1. Convenient transportation and
installation
Factory assembly
Modular organization
Single-sided air intake and two-sided air
intake
2. Excellent heat exchange performance
Low energy consumption, simple and reliable
operation, and low maintenance costs. The product uses the combination of
coiled water and coiled pre-cooling of the air and water co-flow mixed-flow
secondary heat exchange to achieve efficient heat transfer. The air and cooling
water flow in the same direction through the surface of the coil, ensuring that
the cooling water can completely cover the surface of the coil, and the surface
of the coil is always completely wet. Compared with the reverse structure of air
and water, the formation of dry spots and scale on the surface of the coil is
effectively avoided, and efficient heat exchange is realized. The cross-type
water collection design strictly controls the drifting water loss, and its
water rinsing rate is less than 0.001%.
3. Convenient maintenance, can achieve
non-stop maintenance
The huge space inside the tower provides
revolutionary convenience for the routine maintenance of the equipment. The
repair of the coils at the key parts is simple and easy due to the structure of
the equipment; the float valve and the filter can be repaired without stopping
the machine. The nozzle and coil can be easily inspected while the unit is in
operation.
4. Low operating costs, energy saving and
environmental protection
The unique structure of this product, as
well as its unique high thermal performance, so the working medium temperature
is low, running nodes, water saving, low noise, no drifting and low maintenance
costs, is a true energy-saving and environmentally friendly product.
5. Low failure rate
Both the fan and the pump are made of high
quality bearings, and there are no other running wear parts.
The fan adopts a direct-connected structure
and has no transmission loss caused by the pulley structure. Low noise and low
failure rate.
6. Available for auxiliary equipment
For some small cooling projects, we can
connect the closed cooling tower with the circulating water pump, circulating
water tank and control system to form an integral model, which is convenient
for users to use the product.
Structure diagram
1.Hot and humid air outlet
2.Fresh air inlet
3.Process fluid outlet
4.Process fluid inlet
5.Fan motor
6.Coil (copper pipe or steel pipe)
7.Water collector
8.Spray pump
9.PVC heat sink
10.Sprinkler system
Fan motor
The fan adopts aluminum alloy blade cooling
tower special axial flow fan, which has high strength, large air volume, low
energy consumption, low noise and long service life. The streamlined
high-strength air cylinder ensures the inlet of the fan and the outlet airflow
is uniform, minimizing the fan energy. Consumption.
The motor adopts a motor for the fully
enclosed cooling tower, which is suitable for long-term continuous operation in
a humid and hot environment. It has high efficiency, low noise, long life and
high reliability.
Heat exchange coil
The heat exchange coil is a key component
of the cooling tower, and is made of a copper tube or a high-quality copper
tube; the interior is cooled by a cooling medium, and the external water is
sprayed to achieve cooling requirements;
Steel pipe (G type) or stainless steel pipe
(S type), after grading and overall three 2.5Mpa strong pressure test, to
ensure that the weld quality is 100% qualified, the whole pipe bundle is hot
dip galvanized in the high temperature melting tank as a whole to ensure the
coil Excellent performance.
Copper tube (T type): Deoxidized T2 high
quality copper tube is used. The connection between copper tube and elbow is
welded by silver electrode. The welding point is small and the quality is good.
The design pressure is 1.2Mpa.
Stainless steel tube (S type): optional
from 304 or 316 stainless steel. Its anti-corrosion ability can reach: NaCI
solution with chlorine content of 750ppm; sulfide (such as S04) content of
1200ppm; calcification (such as CaCo3) content of 800ppm; silicon content (such
as SiO2) of 150ppm, design operation temperature difference of 27.8 °C. The
circulating water should not contain oil, fatty acids or organic dissolved
substances.
Protective panel
The cooling tower
protective panel is made of imported galvanized sheet. It is one of the
strongest corrosion-resistant galvanized sheets. Its service life is 3-6 times
that of ordinary galvanized sheet, and it has strong heat resistance and
excellent heat resistance. Beautiful appearance, etc.
Spray pump
It adopts
high-quality mechanical seal that is not restricted by steering, has no leakage,
long service life, and uses special outdoor type motor and special imported
bearing to ensure long-term reliable operation of the pump, with low power, low
lift, large flow, low noise, etc. Features.
PVC heat sink
PVC
heat-dissipating filler is a film-type filler with an oxygen index of 33, which
meets the national B1 flame-retardant standard. Each piece of packing has its
own water collector and louver. The packing is suspended from a galvanized
steel pipe supported by the tower structure.
Water collector
The detachable
water collector adopts high-quality PVC material, and its structure can
effectively remove the moisture in the humid air by changing the flow direction
of the air, so that the water drips rate is below 0.001%; maximally save
water resources and ensure the tower body There is no pollution around, which
can prevent the spread of Legionella bacteria.
Spray distribution
system
The large-flow
basket type nozzle is used to ensure that the cloth water is continuously and
evenly sprayed on the wall of the coil. Under the action of the air, the water
is wrapped to the surface of the coil to the maximum extent, so that the water,
fresh air and the medium in the tube are fully exchanged. The nozzle and the nozzle
are connected to the spray pipe for easy removal.
Electronic
descaler (optional accessory)
Using electronic
pulse technology to descale the circulating water, sterilizing and algae treatment,
using 220V power supply, effectively reducing the formation of coil structure
and filler surface structure
Immersion electric
heater (optional accessory)
The heater is a
stainless steel heater. During shutdown, in order to prevent the water in the
collection basin from freezing, it is necessary to provide a system consisting
of an electric heater and control immersed in water in each tower.
Application in the photovoltaic industry
In the photovoltaic industry, the safety of
ingot PCW systems for single crystal furnaces and polycrystalline furnaces is
extremely important, so the water quality of circulating water is extremely
high.
Application in the machinery industry
High-speed equipment in industrial production
will generate heat. These waste heats need to be drained in time to prevent
high temperature damage, such as air compressor water jacket, reverse mold
cooling, transformer cooling, and engine water jacket cooling.
Application in the air conditioning
industry
Evaporative condenser is used in the
air-conditioning industry, and the condensing temperature and pressure are
significantly reduced. The water-source heat pump system room air-conditioning
system
Application in special industries
Cooling of special fluids in some industries because fluids cannot come into contact with the outside world. Quenching oil, sewage, emulsion, etc., need to use closed cooling method, the heat exchanger arm is generally tube box type, to facilitate maintenance.
Ground source heat pump air conditioning system
Water ring heat conditioning system cooling
The safety of the equipment that needs to
be cooled in the metallurgical industry clock is important, so the water
quality of the circulating water is extremely high, such as the blast furnace
circulating water in the iron making, the crystal library in the continuous
casting, the oxygen furnace in the electric furnace, etc. High cooling water.
1, The requirements of the use of the environment
(1) Locations where acid exhaust, explosive
dust, severe soot, and excessive water vapor should be avoided
(2) Placed beside the building and should
be kept at a sufficient distance from the air inlet (05-3M, depending on the
model)
(3) Placed in the well wall, should be
alert to the hot air return caused by the hot air return, special circumstances
can consider the air intake device
2, Piping problems
(1) Piping and pump valves should be
installed below the operating water level of the cooling tower to prevent
overflow and air inhalation.
(2) When considering the location of the
equipment, there should be sufficient pump head, and the pressure loss along
the path and the pressure loss of the cooling coil should be considered.
(3) The fluid flanged interface flange
pressure is designed to be 1Mpa, all pipes are considered for hangers or
supports
3, Consider fluid compatibility
(1) The fluid to be cooled by the fluid
cooler must be compatible with the cooling coil, otherwise it will cause
corrosion or blasting of the coil. For example, refrigerant ammonia is not
compatible with copper tubes, and brine alkaline water is not compatible with
carbon steel tubes and copper tubes.
4. Application in special industries
Cooling of special fluids in some industries
because fluids cannot come into contact with the outside world. For example,
quenching oil, sewage, emulsion, etc., need to use closed cooling method, the
heat exchange arm is generally tube box type, to facilitate maintenance.
5, Capacity control
For multi-closed closed cooling towers, the
number of running towers can be changed
For towers with multiple fans, the number
of fans that can be changed
6, Spray system requirements
(1) With the operation of the closed
cooling tower (evaporation cooling), part of the water evaporates, and the
minerals and other impurities left in the water accumulate in the water tank,
because the water quality must be checked regularly, and the sewage is cleaned
regularly. Good control of water quality and prevention of scaling. The
cleaning of the sink is generally recommended once a week in the summer and
once every two weeks in the winter.
(2) Sprinkler water quality requirements:
areas with particularly poor water quality should be treated with
decontamination (softening), and it is recommended to use stainless steel.
(3) Replenishing amount of spray water
(4) Evaporation ≤ flow rate
08% + water liberation rate ≤ 0.1% + sewage discharge ≤ 03% = circulation
flow ≤ 1.2
Sprinkler system antifreeze needs to
consider one of the following three methods:
1. Set indoor insulation water tank, the
flow tank has enough capacity, and all the spray water can be collected and
moisturized when the machine is stopped.
2. Set the heater in the spray tank,
generally using a submerged electric heater steam coil for heat injection
3. When the system stops running, drain the
spray water clean.
7, Exhaust
The closed system of the fluid is operated.
The steel pipe can be considered as a cooling coil. It can be fully enclosed or
semi-closed. The steel pipe is used as a cold coil and must be fully sealed.
The fluid is used to replenish the fluid. The gas in the pipe can be the
highest in the pipeline. Install the automatic exhaust valve at the point. When
the gas pressure reaches the set value, the valve will automatically open the
gas. It can also be equipped with a manual exhaust device.
8, Supplementary water
The circulating water of the closed system
can be demineralized water, demineralized water or condensed water, etc. due to
the requirements of the production process for water quality.
9, The cooling coil of the closed cooling
tower antifreeze problem (very important)
When the temperature is low in winter, the
circulating water of the closed system will not freeze even if the circulating
water keeps flowing. There must be proper antifreeze measures. Generally, the
following two methods are most suitable:
(1) Keep the circulating water at a certain
heat load and ensure that the circulating water temperature is not lower than 7
°C (the warm area can be no less than 3 °C). To ensure this heat load, an
immersed electric heater can generally be installed in the piping system. Or
steam coil heat injector (Figure 1: set the electric heater in the water tank
or set the auxiliary heater in the pipeline as shown in Figure 2) while
maintaining a small flow of circulating water in the closed system.
(2) The most effective method is to inject
antifreeze, ethylene glycol or propylene glycol solution in a closed system.
The proportion of the filling is as follows.
Antifreeze fitting ratio table
please contact me
Ann
Sales Engineer
H'Stars (Guangzhou) Refrigerating Equipment Group Ltd.
No.1 Guoyuan 4th Road,the Northern Part of the Eastern Section of Guangzhou Econmic &Technology Development District,Guangzhou,China.
Tex : +86 -20-62266755 ext 673| Fax: +86 -20-62266081
Mobile/WhatsApp/Wechat: +8615800240365
Web: www.hstarschiller.com www.heatexchangermaker.com
