Description

Technical Field of the Invention:

The technical field of the invention relates to the water evaporation recovery on the cooling towers of industries and power plants.

Background of the invention:

Water is one of the most integral components of industry and the industries are the most extravagant consumers of water. Water plays a critical role in the production process all around the world. As the water consumption increasingly rises in the industries and no proper solution is developed to lower the use of it, we are daily witnessing the waste of outstanding extent of water in various industries.

The technical problems of cooling towers include:

• The impossibility of water evaporation recovery

• In a 100 thousand gallon per minute (GPM) cooling tower (with the cooling range of 24 degrees Fahrenheit), 5 pools of 25 thousand gallon water is evaporated per hour in the industries (ref. International Resources)

• The high cost of blowdown due to evaporated water, mineral deposits, the impossibility of reusing in industries, and the need for fresh water from the rivers ...

• The high cost of supplying fresh water from the rivers and its refinement in the refineries for industrial application

• The need for expert manpower in the current processes of water and chemical material supply and maintenance and industrial water system maintenance controls.

Prior Art:

So far no practical solution has been provided to recycle the evaporated water from the cooling towers and the industrial companies at the best conditions establish their industrial units near the seas in order to gain the required water. This is not a possible solution for all of countries and regions. Meanwhile, the sea water is not directly usable in the cooling towers and it needs to be refined.

Summary of the invention:

The purpose of this invention is to recycle cooling tower water evaporation of the industries and power plants known as cooling tower. The evaporation flow returns to the consumption cycle after being changed into the light water thereby decreasing water consumption and anti-fouling chemicals usage. Moreover, applying this system reduces high mineral content water discharge into the sewage.

This system, in the shape of an evaporation collector head, is inserted on the top of the cooling towers as a result of which the maximum water evaporation released into the air is collected.

The insertion style, the device function and the exchange of evaporation into light water creates a relative vacuum inside the cooling tower.

Using snail-like molecular sieve with the microfiber internal layer to trap water evaporation molecules in the vacuum container increases the density of water droplets since water evaporation hits the microfiber and the condensation of at least 70% occurs due to the the negative pressure in the container.

In the molecular sieve method, some practical methods are used to separate the water molecules floating on the air carrying heat flow and to trap these molecules in the microfiber snails. The molecules change into bigger separable droplets of water in the microfiber snails and are separated. They are put in the negative pressure flow of the molecular sieve tanks. By doing so, the cooling systems work with up to a million cubic meters of air per hour.

The simultaneous use of rotational torque intensifier fans in the snail-like container of molecular sieve causes the relative separation of water molecules from air (regarding the difference in molecular density) and guides the water droplets in the vacuum container using the centrifugal force caused by the rotational torque of the fans.

While this system prevents the escape of saturated droplets in the hot air coming out of the fans of cooling towers, saves the evaporation changed into the light water in its tank and then discharges it into the required place through the pump. The pump has a liquid -identifying sensor.

To estimate the speed of cubic meter air absorbed by the molecular sieve fans, the extent of air coming out of the external fan of cooling towers must be taken into account. The number of molecular sieve snails required for the device are developed and installed accordingly.

The air passing through the system must maximize its speed while passing the snaillike separation system (molecular sieve) based on the molecular weight of water and air so that the water molecules in the air can hit the microfiber water absorption layer. The entire required molecular sieve snails (36 ones for a 6 - meter diameter cooling) must be placed in a fiberglass black box and a vacuum space (negative pressure) so that the system can gain the required efficiency.

This system must pass the air thrown out of the cooling tower fans through itself in a concentrated way. To do so, the holder bases movable to the sides need to be used in order to reach the gear box engine and propeller of the main fan for its repair.

In this invention, the humidity test is performed using the calibrated hygrometer equipment. The cooled water and the input hot water and the output evaporation are compared with the percentage of the evaporation entering into the container.

Brief description of the drawings:

Figure 1 : The general view of the device

Figure 2: Exploded view of molecular sieve device

Figure 3: The evaporation collector body

Figure 4: The internal view of the device

Figure 5: The schematic view of the molecular sieve coils

Detaille description of the drawings:

Figure 1 :

The general view of the device is the assembled pieces the dimensions of which change according to the size of industrial cooling towers tanks ordered to be installed in the industry (for example, the molecular sieve with outside diameter of 3 meters with the air output volume of 120 thousand cubic meters per hour is used for the 120 thousand cubic meter per hour cooling tower and ...)

Figure 2:

Exploded view of molecular sieve device including:

1 - Chassis made of bending steel (beam) and anti-corrosion coating and an PVC insulating layer

2- The floor of molecular sieve body is made of fiberglass which are molded in pieces at the required numbers and are assembled beside each other with the fiberglass paste to form the circle of tank floor (in this sample there are 12 pieces)

3- Molecular sieve central evaporation collector body and the installing place of molecular sieve coils - this part is also molded with separate slices and assembled beside each other using the fiberglass paste (in this picture it is made of 6 slices) 4- The external body of Molecular sieve tank - in this sample, to avoid the traffic load, 24 molded slices are assembled together with fiberglass paste and constructed in two separate halves. These slices form a cylindrical tank.

5- Cylinder (two attached halves) is constructed to complete the height and maintain the interior part of the ceiling and connected together with the special fiberglass paste.

6- Molecular sieve coil pieces (molecular sieve means molecular separation) which is developed according to the capacity of required air for the refinement (in this device with the capacity of 120 thousand cubic meters per hour, 36 pieces are installed)

7- Molecular sieve ceiling is made of 12 molded slices and is installed to the external and internal body of the device in two separate halves.

8- Exhaust system (12 ones) of coaxial fans kind with the high aeration capacity and 3000 rounds per minute (along with 12 dampers) for 120 thousand cubic meters per hour capacity (in higher capacities, the number of exhausts increases according to the required capacity)

9- The maintenance railings of the ceiling are welded to the joint points of transportation legs.

10- The access ladder to the device ceiling from the separate entrance doors to the device which is connected and welded to the chassis.

1 1 - Intensifier fans in the snail-like container of molecular sieve causes the relative separation of water molecules from air.

Figure 3:

The evaporation collector body is designed and divided in 36 coil molecular sieve (in this sample) and installed in the center of the device at 6 slices (connected from the bottom to the tank floor and from the top to the ceiling holder by the special fiberglass paste).

Figure 4:

The internal view of the device and the form of molecular sieve coils insertion on the evaporation collector body.

Figure 5:

The schematic view of the molecular sieve coils are shown which are molded and assembled with the specified rounds compatible with the extent and intensity of the humidity in the development area and in separate pieces (the internal diameter of the coil opening depends on the amount of aeration and the diameter of air exhaust and the capacity of the devices, (in this sample the diameter is 200 mm)

The advantages of the invention

Since the molecular sieve system for separating the droplets and water evaporation molecules is developed from the output air of cooling system, it has multiple advantages and applications as follows:

1 . The ability to recover over 70% of output evaporation of cooling towers

2. Change the water cooling process entered into the cooling tower system

3. Reduce the use of anti-fouling chemicals applied in the cooling towers

4. Lower the need for discharging the blowdown which is created as a result of water evaporation in the system

5. Decrease the cost of supplying required water and changing the river water into the industrial water in the refineries

6. Reducing the costs and recovering the water evaporation increases the opportunity of production

7. The water evaporations of this device are in the form of light water and can be returned to the system.

Invention Application

The principal application of these systems include separating the water molecules from air, changing them into the recyclable droplets and returning the water in the form of light water (occasionally with the added chemical material during evaporation) to the cycle of consumption and reducing the water consumption.

Moreover, the abilities of the invention include:

1 . Separating the output water evaporation of industrial cooling towers with the high speed and high volume of output air.

2. Molecular sieve system based on the molecular weight of water and air

3. Recovering millions of cubic meters of evaporated water from the cooling systems of industries (power plants, steel industries, ..) and changing them into the water as light as distilled water.

4. Reducing the use of chemical material used for preventing the water mineral sediment

5. Eliminating the need for water blowdown, the minerals of which are very high due to rotation and cooling

6. Reducing the use of water in the industries located in dry areas

7. The possibility to transfer this technical knowledge to the industrial sectors and related power plants worldwide The executive method for the application of the invention:

This device is made on the holding platforms, assembled near the cooling tower exit and then installed on the opening of cooling tower. This connection is performed in a way that the output evaporations are not able to escape from the surrounding areas of the device and all of the output evaporation is guided into the device.

When the required power for device feeding is connected, the device starts working as the cooling towers turns on and off.

The output of water pump collected in the device tank is transferred to the considered tanks for being reused.

This system can vary in size and dimensions regarding the requirements and the dimensions of cooling towers. Even in the super-heavy cooling towers, the device will be placed beside the cooling tower instead of being placed on its top and the evaporations are transferred into the system through the special channels with high pressure air.