The application problem of heat exchanger in the pharmaceutical industry is solved from the point of view of technology
Heat exchangers are commonly used in petroleum, chemical, metallurgy, electric power, shipping, central heating, refrigeration and air conditioning, machinery, food, pharmaceutical and other fields. According to the relevant data, the demand structure of the pharmaceutical industry for heat exchangers accounts for about 5% of the main application fields and is increasing.
In fact, there are many types of heat exchangers in our country, which can be divided into tube type, version type and other types of heat exchangers according to the shape and structure of the heat transfer surface. Among them, tube heat exchanger can be divided into shell heat exchanger, tube heat exchanger, snake heat exchanger; Plate heat exchanger can be divided into a plate heat exchanger, plate-fin heat exchanger, plate-shell heat exchanger and spiral plate heat exchanger.
In addition to a variety of heat exchangers have many advantages. Take shell and tube heat exchanger as an example. It is an internal heat exchanger with the wall of the tube bundle enclosed in the shell as the heat transfer surface. This kind of heat exchanger has simple structure and reliable operation. It can be made of various structural materials (mainly metal materials) and can be used under high temperature and high pressure.
In China’s pharmaceutical industry, shell and tube heat exchangers have been widely used by pharmaceutical enterprises because of their strong structure, high reliability and strong adaptability. In addition, shell and tube heat exchangers also cover a small area, can be more effective to save materials, has a strong reliability and other advantages. This is of great significance in the pharmaceutical industry, which requires GMP certification and a high level of safety. The successful replacement of shell to plate has also become one of the main reasons for pharmaceutical companies to choose and buy.
Depending on the industry, the demand of the pharmaceutical industry for heat exchangers is still increasing. It is estimated that the compound growth rate of China’s heat exchanger industry will be 11% from 2015 to 2020. Although the demand is large, the growth rate is fast, but the heat exchanger industry still has many problems to be resolved. For example, the development of products, the supply of upstream raw materials and the lack of production equipment lead to the low manufacturing process. In addition, there are all walks of life in the emphasis on energy conservation and environmental protection. In these circumstances, the low efficiency of ordinary heat exchangers will be eliminated.
To solve the problem, heat exchanger enterprises need to start from the process. For example, the application of heat exchanger in the biopharmaceutical industry, biopharmaceutical has higher requirements on equipment sanitation, and heat exchanger is an important part of the process of water injection. After many processes, heat exchanger is required to exchange heat before the next process. Therefore, the enterprises concerned should focus on the technology of heat exchanger.
Some enterprises on the traditional heat exchanger innovation and improvement. Taking the traditional baffle shell and tube heat exchanger as an example, the equipment has many significant problems, such as the flow dead zone is too large, the pressure drop loss is high, the heat transfer efficiency is poor complex structure, and so on, the existence of these problems make its application hindered.
In view of the above problems, the company has designed a new type of spiral wire shell heat exchanger. According to the designer’s introduction, the device adopts the simplified idea of dividing the bundle support structure into parts, which simplifies the manufacture of the large spiral surface covering the whole bundle.
The fluid between adjacent pipes will inevitably interfere with each other in the process of flow, and new disturbances will occur in the process of interference, causing many vortexes to flow and promoting the fluid microcluster fusion. This can enhance the convective heat transfer coefficient to some extent, further promote the improvement of energy utilization, and achieve the goal of energy saving.
“Spiral-wound type heat exchangers not only have very good heat transfer performance, but also require less manufacturing cost, and can also make a great contribution to energy conservation and emission reduction.” “Said the designer.
As far as the heat exchanger in the pharmaceutical industry is concerned, although some progress has been made in some aspects, the development level of heat exchanger may not keep pace with that of the pharmaceutical industry. Therefore, relevant enterprises should solve practical problems, actively research and develop, improve the performance of heat exchangers, and strengthen their in-depth research and application in the pharmaceutical industry.
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