Issue 20/2014 - Energy Saving in Chemical Processes

Recently, Zhejiang Wanxiang Technology Co.
, Ltd.
cooperated with University of Shanghai for Science and Technology to apply the plate heat exchange structure to evaporative cooling equipment and developed a high-efficiency and energy-saving evaporative cooling (condenser) device
.
Application tests show that the series of new equipment has 1.
3 times higher cooling efficiency than traditional heat exchangers, and the comprehensive energy and material saving is more than 40%, which adds a sharp tool
for energy saving and consumption reduction in the chemical production process.

According to reports, the R & D personnel have improved the product structure, heat exchange form and control mode, so that its power consumption, water consumption, material consumption, noise and so on have been greatly reduced
.
Due to the small size and the fact that the new plate is not easy to scale, the related costs such as transportation and maintenance are also greatly reduced
.

Traditional evaporative cooling (condensing) is mostly a serpentine coil heat exchanger made of round or elliptical tubes, which consumes a lot of energy and materials, and consumes a lot of water and electricity
in the rain area formed by its water spray space.
Through market research and theoretical analysis, the technical R&D personnel of Wanxiang Technology believe that the high-efficiency plate heat exchange structure applied in the field of liquid heat exchange can be applied to evaporative cooling (condensing) products, which can improve heat exchange efficiency and reduce power consumption
.
Since the end of 2012, they have cooperated with University of Shanghai for Science and Technology to complete the research and development of high-efficiency plate evaporative cooling (condensing) device and put it on the market through a series of processes such as theoretical analysis and calculation, sample production, sample testing, product improvement, and product launch, and the products have won unanimous praise
from users.

Zhang Lixin, director of the Education and Training Committee of the Cooling Equipment Branch of China General Machinery Industry Association and leader of the cooling technology knowledge service team of University of Shanghai for Science and Technology, said that the product adopts a new plate heat exchanger structure and intelligent control system, which is easy to change the spray water distribution to directional water distribution, not only the water film is evenly distributed, it is not easy to produce floating water, but also reduces the resistance of air flow, which is conducive to reducing the loss of floating water, fan power consumption and aerodynamic noise, and can realize the design of rain-free areas.
It can also completely eliminate the noise of water showering; The reasonable design of the internal solder joint distribution of the plate and the special treatment of the inner and outer surfaces of the plate not only improve the strength of the plate, but also increase the heat transfer coefficient and surface dispersion coefficient caused by the disturbance of the internal and external fluids; For the intelligent control of different seasons and different loads, the use of frequency conversion to adjust the air volume to achieve energy saving, and can be divided into dry and wet mode operation, dry operation mode to achieve zero water consumption, wet operation mode to ensure the cooling (condensation) capacity
of the design conditions.

In addition, the series of equipment does not need to worry about the scaling on the water-sprayed side of the plate can not be treated, only need to brush with a wire brush, can be restored as new, such as the choice of corrosion-resistant stainless steel plate material can be used
almost permanently.

At present, the project has applied for 8 national patents, the products are also mass-produced and sold, and this year more than 20 new products have been exported to the United States, Japan, Australia, New Zealand, Latin America, Africa, Southeast Asia and other countries and regions
.
In addition to the chemical industry, the series of equipment can also be used in medicine, hydropower, beer, coal mine, steel, aquatic products and other industries, with broad
market prospects.
(Qian Yan)